os_solaris.cpp revision 6683:08a2164660fb
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 "services/attachListener.hpp" 63#include "services/memTracker.hpp" 64#include "services/runtimeService.hpp" 65#include "utilities/decoder.hpp" 66#include "utilities/defaultStream.hpp" 67#include "utilities/events.hpp" 68#include "utilities/growableArray.hpp" 69#include "utilities/vmError.hpp" 70 71// put OS-includes here 72# include <dlfcn.h> 73# include <errno.h> 74# include <exception> 75# include <link.h> 76# include <poll.h> 77# include <pthread.h> 78# include <pwd.h> 79# include <schedctl.h> 80# include <setjmp.h> 81# include <signal.h> 82# include <stdio.h> 83# include <alloca.h> 84# include <sys/filio.h> 85# include <sys/ipc.h> 86# include <sys/lwp.h> 87# include <sys/machelf.h> // for elf Sym structure used by dladdr1 88# include <sys/mman.h> 89# include <sys/processor.h> 90# include <sys/procset.h> 91# include <sys/pset.h> 92# include <sys/resource.h> 93# include <sys/shm.h> 94# include <sys/socket.h> 95# include <sys/stat.h> 96# include <sys/systeminfo.h> 97# include <sys/time.h> 98# include <sys/times.h> 99# include <sys/types.h> 100# include <sys/wait.h> 101# include <sys/utsname.h> 102# include <thread.h> 103# include <unistd.h> 104# include <sys/priocntl.h> 105# include <sys/rtpriocntl.h> 106# include <sys/tspriocntl.h> 107# include <sys/iapriocntl.h> 108# include <sys/fxpriocntl.h> 109# include <sys/loadavg.h> 110# include <string.h> 111# include <stdio.h> 112 113# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 114# include <sys/procfs.h> // see comment in <sys/procfs.h> 115 116#define MAX_PATH (2 * K) 117 118// for timer info max values which include all bits 119#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 120 121 122// Here are some liblgrp types from sys/lgrp_user.h to be able to 123// compile on older systems without this header file. 124 125#ifndef MADV_ACCESS_LWP 126# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 127#endif 128#ifndef MADV_ACCESS_MANY 129# define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 130#endif 131 132#ifndef LGRP_RSRC_CPU 133# define LGRP_RSRC_CPU 0 /* CPU resources */ 134#endif 135#ifndef LGRP_RSRC_MEM 136# define LGRP_RSRC_MEM 1 /* memory resources */ 137#endif 138 139// see thr_setprio(3T) for the basis of these numbers 140#define MinimumPriority 0 141#define NormalPriority 64 142#define MaximumPriority 127 143 144// Values for ThreadPriorityPolicy == 1 145int prio_policy1[CriticalPriority+1] = { 146 -99999, 0, 16, 32, 48, 64, 147 80, 96, 112, 124, 127, 127 }; 148 149// System parameters used internally 150static clock_t clock_tics_per_sec = 100; 151 152// Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 153static bool enabled_extended_FILE_stdio = false; 154 155// For diagnostics to print a message once. see run_periodic_checks 156static bool check_addr0_done = false; 157static sigset_t check_signal_done; 158static bool check_signals = true; 159 160address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 161address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 162 163address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 164 165 166// "default" initializers for missing libc APIs 167extern "C" { 168 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 169 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 170 171 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 172 static int lwp_cond_destroy(cond_t *cv) { return 0; } 173} 174 175// "default" initializers for pthread-based synchronization 176extern "C" { 177 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 178 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 179} 180 181static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); 182 183// Thread Local Storage 184// This is common to all Solaris platforms so it is defined here, 185// in this common file. 186// The declarations are in the os_cpu threadLS*.hpp files. 187// 188// Static member initialization for TLS 189Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 190 191#ifndef PRODUCT 192#define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 193 194int ThreadLocalStorage::_tcacheHit = 0; 195int ThreadLocalStorage::_tcacheMiss = 0; 196 197void ThreadLocalStorage::print_statistics() { 198 int total = _tcacheMiss+_tcacheHit; 199 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 200 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 201} 202#undef _PCT 203#endif // PRODUCT 204 205Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 206 int index) { 207 Thread *thread = get_thread_slow(); 208 if (thread != NULL) { 209 address sp = os::current_stack_pointer(); 210 guarantee(thread->_stack_base == NULL || 211 (sp <= thread->_stack_base && 212 sp >= thread->_stack_base - thread->_stack_size) || 213 is_error_reported(), 214 "sp must be inside of selected thread stack"); 215 216 thread->set_self_raw_id(raw_id); // mark for quick retrieval 217 _get_thread_cache[index] = thread; 218 } 219 return thread; 220} 221 222 223static const double all_zero[sizeof(Thread) / sizeof(double) + 1] = {0}; 224#define NO_CACHED_THREAD ((Thread*)all_zero) 225 226void ThreadLocalStorage::pd_set_thread(Thread* thread) { 227 228 // Store the new value before updating the cache to prevent a race 229 // between get_thread_via_cache_slowly() and this store operation. 230 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 231 232 // Update thread cache with new thread if setting on thread create, 233 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 234 uintptr_t raw = pd_raw_thread_id(); 235 int ix = pd_cache_index(raw); 236 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 237} 238 239void ThreadLocalStorage::pd_init() { 240 for (int i = 0; i < _pd_cache_size; i++) { 241 _get_thread_cache[i] = NO_CACHED_THREAD; 242 } 243} 244 245// Invalidate all the caches (happens to be the same as pd_init). 246void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 247 248#undef NO_CACHED_THREAD 249 250// END Thread Local Storage 251 252static inline size_t adjust_stack_size(address base, size_t size) { 253 if ((ssize_t)size < 0) { 254 // 4759953: Compensate for ridiculous stack size. 255 size = max_intx; 256 } 257 if (size > (size_t)base) { 258 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 259 size = (size_t)base; 260 } 261 return size; 262} 263 264static inline stack_t get_stack_info() { 265 stack_t st; 266 int retval = thr_stksegment(&st); 267 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 268 assert(retval == 0, "incorrect return value from thr_stksegment"); 269 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 270 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 271 return st; 272} 273 274address os::current_stack_base() { 275 int r = thr_main(); 276 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 277 bool is_primordial_thread = r; 278 279 // Workaround 4352906, avoid calls to thr_stksegment by 280 // thr_main after the first one (it looks like we trash 281 // some data, causing the value for ss_sp to be incorrect). 282 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 283 stack_t st = get_stack_info(); 284 if (is_primordial_thread) { 285 // cache initial value of stack base 286 os::Solaris::_main_stack_base = (address)st.ss_sp; 287 } 288 return (address)st.ss_sp; 289 } else { 290 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 291 return os::Solaris::_main_stack_base; 292 } 293} 294 295size_t os::current_stack_size() { 296 size_t size; 297 298 int r = thr_main(); 299 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 300 if (!r) { 301 size = get_stack_info().ss_size; 302 } else { 303 struct rlimit limits; 304 getrlimit(RLIMIT_STACK, &limits); 305 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 306 } 307 // base may not be page aligned 308 address base = current_stack_base(); 309 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 310 return (size_t)(base - bottom); 311} 312 313struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 314 return localtime_r(clock, res); 315} 316 317void os::Solaris::try_enable_extended_io() { 318 typedef int (*enable_extended_FILE_stdio_t)(int, int); 319 320 if (!UseExtendedFileIO) { 321 return; 322 } 323 324 enable_extended_FILE_stdio_t enabler = 325 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 326 "enable_extended_FILE_stdio"); 327 if (enabler) { 328 enabler(-1, -1); 329 } 330} 331 332static int _processors_online = 0; 333 334 jint os::Solaris::_os_thread_limit = 0; 335volatile jint os::Solaris::_os_thread_count = 0; 336 337julong os::available_memory() { 338 return Solaris::available_memory(); 339} 340 341julong os::Solaris::available_memory() { 342 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 343} 344 345julong os::Solaris::_physical_memory = 0; 346 347julong os::physical_memory() { 348 return Solaris::physical_memory(); 349} 350 351static hrtime_t first_hrtime = 0; 352static const hrtime_t hrtime_hz = 1000*1000*1000; 353static volatile hrtime_t max_hrtime = 0; 354 355 356void os::Solaris::initialize_system_info() { 357 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 358 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 359 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 360} 361 362int os::active_processor_count() { 363 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 364 pid_t pid = getpid(); 365 psetid_t pset = PS_NONE; 366 // Are we running in a processor set or is there any processor set around? 367 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 368 uint_t pset_cpus; 369 // Query the number of cpus available to us. 370 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 371 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 372 _processors_online = pset_cpus; 373 return pset_cpus; 374 } 375 } 376 // Otherwise return number of online cpus 377 return online_cpus; 378} 379 380static bool find_processors_in_pset(psetid_t pset, 381 processorid_t** id_array, 382 uint_t* id_length) { 383 bool result = false; 384 // Find the number of processors in the processor set. 385 if (pset_info(pset, NULL, id_length, NULL) == 0) { 386 // Make up an array to hold their ids. 387 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 388 // Fill in the array with their processor ids. 389 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 390 result = true; 391 } 392 } 393 return result; 394} 395 396// Callers of find_processors_online() must tolerate imprecise results -- 397// the system configuration can change asynchronously because of DR 398// or explicit psradm operations. 399// 400// We also need to take care that the loop (below) terminates as the 401// number of processors online can change between the _SC_NPROCESSORS_ONLN 402// request and the loop that builds the list of processor ids. Unfortunately 403// there's no reliable way to determine the maximum valid processor id, 404// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 405// man pages, which claim the processor id set is "sparse, but 406// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 407// exit the loop. 408// 409// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 410// not available on S8.0. 411 412static bool find_processors_online(processorid_t** id_array, 413 uint* id_length) { 414 const processorid_t MAX_PROCESSOR_ID = 100000; 415 // Find the number of processors online. 416 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 417 // Make up an array to hold their ids. 418 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 419 // Processors need not be numbered consecutively. 420 long found = 0; 421 processorid_t next = 0; 422 while (found < *id_length && next < MAX_PROCESSOR_ID) { 423 processor_info_t info; 424 if (processor_info(next, &info) == 0) { 425 // NB, PI_NOINTR processors are effectively online ... 426 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 427 (*id_array)[found] = next; 428 found += 1; 429 } 430 } 431 next += 1; 432 } 433 if (found < *id_length) { 434 // The loop above didn't identify the expected number of processors. 435 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 436 // and re-running the loop, above, but there's no guarantee of progress 437 // if the system configuration is in flux. Instead, we just return what 438 // we've got. Note that in the worst case find_processors_online() could 439 // return an empty set. (As a fall-back in the case of the empty set we 440 // could just return the ID of the current processor). 441 *id_length = found; 442 } 443 444 return true; 445} 446 447static bool assign_distribution(processorid_t* id_array, 448 uint id_length, 449 uint* distribution, 450 uint distribution_length) { 451 // We assume we can assign processorid_t's to uint's. 452 assert(sizeof(processorid_t) == sizeof(uint), 453 "can't convert processorid_t to uint"); 454 // Quick check to see if we won't succeed. 455 if (id_length < distribution_length) { 456 return false; 457 } 458 // Assign processor ids to the distribution. 459 // Try to shuffle processors to distribute work across boards, 460 // assuming 4 processors per board. 461 const uint processors_per_board = ProcessDistributionStride; 462 // Find the maximum processor id. 463 processorid_t max_id = 0; 464 for (uint m = 0; m < id_length; m += 1) { 465 max_id = MAX2(max_id, id_array[m]); 466 } 467 // The next id, to limit loops. 468 const processorid_t limit_id = max_id + 1; 469 // Make up markers for available processors. 470 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 471 for (uint c = 0; c < limit_id; c += 1) { 472 available_id[c] = false; 473 } 474 for (uint a = 0; a < id_length; a += 1) { 475 available_id[id_array[a]] = true; 476 } 477 // Step by "boards", then by "slot", copying to "assigned". 478 // NEEDS_CLEANUP: The assignment of processors should be stateful, 479 // remembering which processors have been assigned by 480 // previous calls, etc., so as to distribute several 481 // independent calls of this method. What we'd like is 482 // It would be nice to have an API that let us ask 483 // how many processes are bound to a processor, 484 // but we don't have that, either. 485 // In the short term, "board" is static so that 486 // subsequent distributions don't all start at board 0. 487 static uint board = 0; 488 uint assigned = 0; 489 // Until we've found enough processors .... 490 while (assigned < distribution_length) { 491 // ... find the next available processor in the board. 492 for (uint slot = 0; slot < processors_per_board; slot += 1) { 493 uint try_id = board * processors_per_board + slot; 494 if ((try_id < limit_id) && (available_id[try_id] == true)) { 495 distribution[assigned] = try_id; 496 available_id[try_id] = false; 497 assigned += 1; 498 break; 499 } 500 } 501 board += 1; 502 if (board * processors_per_board + 0 >= limit_id) { 503 board = 0; 504 } 505 } 506 if (available_id != NULL) { 507 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal); 508 } 509 return true; 510} 511 512void os::set_native_thread_name(const char *name) { 513 // Not yet implemented. 514 return; 515} 516 517bool os::distribute_processes(uint length, uint* distribution) { 518 bool result = false; 519 // Find the processor id's of all the available CPUs. 520 processorid_t* id_array = NULL; 521 uint id_length = 0; 522 // There are some races between querying information and using it, 523 // since processor sets can change dynamically. 524 psetid_t pset = PS_NONE; 525 // Are we running in a processor set? 526 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 527 result = find_processors_in_pset(pset, &id_array, &id_length); 528 } else { 529 result = find_processors_online(&id_array, &id_length); 530 } 531 if (result == true) { 532 if (id_length >= length) { 533 result = assign_distribution(id_array, id_length, distribution, length); 534 } else { 535 result = false; 536 } 537 } 538 if (id_array != NULL) { 539 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal); 540 } 541 return result; 542} 543 544bool os::bind_to_processor(uint processor_id) { 545 // We assume that a processorid_t can be stored in a uint. 546 assert(sizeof(uint) == sizeof(processorid_t), 547 "can't convert uint to processorid_t"); 548 int bind_result = 549 processor_bind(P_LWPID, // bind LWP. 550 P_MYID, // bind current LWP. 551 (processorid_t) processor_id, // id. 552 NULL); // don't return old binding. 553 return (bind_result == 0); 554} 555 556bool os::getenv(const char* name, char* buffer, int len) { 557 char* val = ::getenv(name); 558 if (val == NULL 559 || strlen(val) + 1 > len ) { 560 if (len > 0) buffer[0] = 0; // return a null string 561 return false; 562 } 563 strcpy(buffer, val); 564 return true; 565} 566 567 568// Return true if user is running as root. 569 570bool os::have_special_privileges() { 571 static bool init = false; 572 static bool privileges = false; 573 if (!init) { 574 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 575 init = true; 576 } 577 return privileges; 578} 579 580 581void os::init_system_properties_values() { 582 // The next steps are taken in the product version: 583 // 584 // Obtain the JAVA_HOME value from the location of libjvm.so. 585 // This library should be located at: 586 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 587 // 588 // If "/jre/lib/" appears at the right place in the path, then we 589 // assume libjvm.so is installed in a JDK and we use this path. 590 // 591 // Otherwise exit with message: "Could not create the Java virtual machine." 592 // 593 // The following extra steps are taken in the debugging version: 594 // 595 // If "/jre/lib/" does NOT appear at the right place in the path 596 // instead of exit check for $JAVA_HOME environment variable. 597 // 598 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 599 // then we append a fake suffix "hotspot/libjvm.so" to this path so 600 // it looks like libjvm.so is installed there 601 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 602 // 603 // Otherwise exit. 604 // 605 // Important note: if the location of libjvm.so changes this 606 // code needs to be changed accordingly. 607 608// Base path of extensions installed on the system. 609#define SYS_EXT_DIR "/usr/jdk/packages" 610#define EXTENSIONS_DIR "/lib/ext" 611#define ENDORSED_DIR "/lib/endorsed" 612 613 char cpu_arch[12]; 614 // Buffer that fits several sprintfs. 615 // Note that the space for the colon and the trailing null are provided 616 // by the nulls included by the sizeof operator. 617 const size_t bufsize = 618 MAX4((size_t)MAXPATHLEN, // For dll_dir & friends. 619 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path 620 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir 621 (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir 622 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); 623 624 // sysclasspath, java_home, dll_dir 625 { 626 char *pslash; 627 os::jvm_path(buf, bufsize); 628 629 // Found the full path to libjvm.so. 630 // Now cut the path to <java_home>/jre if we can. 631 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. 632 pslash = strrchr(buf, '/'); 633 if (pslash != NULL) { 634 *pslash = '\0'; // Get rid of /{client|server|hotspot}. 635 } 636 Arguments::set_dll_dir(buf); 637 638 if (pslash != NULL) { 639 pslash = strrchr(buf, '/'); 640 if (pslash != NULL) { 641 *pslash = '\0'; // Get rid of /<arch>. 642 pslash = strrchr(buf, '/'); 643 if (pslash != NULL) { 644 *pslash = '\0'; // Get rid of /lib. 645 } 646 } 647 } 648 Arguments::set_java_home(buf); 649 set_boot_path('/', ':'); 650 } 651 652 // Where to look for native libraries. 653 { 654 // Use dlinfo() to determine the correct java.library.path. 655 // 656 // If we're launched by the Java launcher, and the user 657 // does not set java.library.path explicitly on the commandline, 658 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 659 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 660 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 661 // /usr/lib), which is exactly what we want. 662 // 663 // If the user does set java.library.path, it completely 664 // overwrites this setting, and always has. 665 // 666 // If we're not launched by the Java launcher, we may 667 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 668 // settings. Again, dlinfo does exactly what we want. 669 670 Dl_serinfo info_sz, *info = &info_sz; 671 Dl_serpath *path; 672 char *library_path; 673 char *common_path = buf; 674 675 // Determine search path count and required buffer size. 676 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 677 FREE_C_HEAP_ARRAY(char, buf, mtInternal); 678 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 679 } 680 681 // Allocate new buffer and initialize. 682 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal); 683 info->dls_size = info_sz.dls_size; 684 info->dls_cnt = info_sz.dls_cnt; 685 686 // Obtain search path information. 687 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 688 FREE_C_HEAP_ARRAY(char, buf, mtInternal); 689 FREE_C_HEAP_ARRAY(char, info, mtInternal); 690 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 691 } 692 693 path = &info->dls_serpath[0]; 694 695 // Note: Due to a legacy implementation, most of the library path 696 // is set in the launcher. This was to accomodate linking restrictions 697 // on legacy Solaris implementations (which are no longer supported). 698 // Eventually, all the library path setting will be done here. 699 // 700 // However, to prevent the proliferation of improperly built native 701 // libraries, the new path component /usr/jdk/packages is added here. 702 703 // Determine the actual CPU architecture. 704 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 705#ifdef _LP64 706 // If we are a 64-bit vm, perform the following translations: 707 // sparc -> sparcv9 708 // i386 -> amd64 709 if (strcmp(cpu_arch, "sparc") == 0) { 710 strcat(cpu_arch, "v9"); 711 } else if (strcmp(cpu_arch, "i386") == 0) { 712 strcpy(cpu_arch, "amd64"); 713 } 714#endif 715 716 // Construct the invariant part of ld_library_path. 717 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch); 718 719 // Struct size is more than sufficient for the path components obtained 720 // through the dlinfo() call, so only add additional space for the path 721 // components explicitly added here. 722 size_t library_path_size = info->dls_size + strlen(common_path); 723 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal); 724 library_path[0] = '\0'; 725 726 // Construct the desired Java library path from the linker's library 727 // search path. 728 // 729 // For compatibility, it is optimal that we insert the additional path 730 // components specific to the Java VM after those components specified 731 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 732 // infrastructure. 733 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it. 734 strcpy(library_path, common_path); 735 } else { 736 int inserted = 0; 737 int i; 738 for (i = 0; i < info->dls_cnt; i++, path++) { 739 uint_t flags = path->dls_flags & LA_SER_MASK; 740 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 741 strcat(library_path, common_path); 742 strcat(library_path, os::path_separator()); 743 inserted = 1; 744 } 745 strcat(library_path, path->dls_name); 746 strcat(library_path, os::path_separator()); 747 } 748 // Eliminate trailing path separator. 749 library_path[strlen(library_path)-1] = '\0'; 750 } 751 752 // happens before argument parsing - can't use a trace flag 753 // tty->print_raw("init_system_properties_values: native lib path: "); 754 // tty->print_raw_cr(library_path); 755 756 // Callee copies into its own buffer. 757 Arguments::set_library_path(library_path); 758 759 FREE_C_HEAP_ARRAY(char, library_path, mtInternal); 760 FREE_C_HEAP_ARRAY(char, info, mtInternal); 761 } 762 763 // Extensions directories. 764 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); 765 Arguments::set_ext_dirs(buf); 766 767 // Endorsed standards default directory. 768 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 769 Arguments::set_endorsed_dirs(buf); 770 771 FREE_C_HEAP_ARRAY(char, buf, mtInternal); 772 773#undef SYS_EXT_DIR 774#undef EXTENSIONS_DIR 775#undef ENDORSED_DIR 776} 777 778void os::breakpoint() { 779 BREAKPOINT; 780} 781 782bool os::obsolete_option(const JavaVMOption *option) 783{ 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) { 908 909 //Save caller's signal mask 910 sigset_t sigmask; 911 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 912 OSThread *osthread = thread->osthread(); 913 osthread->set_caller_sigmask(sigmask); 914 915 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 916 if (!ReduceSignalUsage) { 917 if (thread->is_VM_thread()) { 918 // Only the VM thread handles BREAK_SIGNAL ... 919 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 920 } else { 921 // ... all other threads block BREAK_SIGNAL 922 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 923 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 924 } 925 } 926} 927 928bool os::create_attached_thread(JavaThread* thread) { 929#ifdef ASSERT 930 thread->verify_not_published(); 931#endif 932 OSThread* osthread = create_os_thread(thread, thr_self()); 933 if (osthread == NULL) { 934 return false; 935 } 936 937 // Initial thread state is RUNNABLE 938 osthread->set_state(RUNNABLE); 939 thread->set_osthread(osthread); 940 941 // initialize signal mask for this thread 942 // and save the caller's signal mask 943 os::Solaris::hotspot_sigmask(thread); 944 945 return true; 946} 947 948bool os::create_main_thread(JavaThread* thread) { 949#ifdef ASSERT 950 thread->verify_not_published(); 951#endif 952 if (_starting_thread == NULL) { 953 _starting_thread = create_os_thread(thread, main_thread); 954 if (_starting_thread == NULL) { 955 return false; 956 } 957 } 958 959 // The primodial thread is runnable from the start 960 _starting_thread->set_state(RUNNABLE); 961 962 thread->set_osthread(_starting_thread); 963 964 // initialize signal mask for this thread 965 // and save the caller's signal mask 966 os::Solaris::hotspot_sigmask(thread); 967 968 return true; 969} 970 971 972bool os::create_thread(Thread* thread, ThreadType thr_type, 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// Note: SIGRTMIN is a macro that calls sysconf() so it will 1117// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1118static bool isJVM1available() { 1119 return SIGJVM1 < SIGRTMIN; 1120} 1121 1122void os::Solaris::signal_sets_init() { 1123 // Should also have an assertion stating we are still single-threaded. 1124 assert(!signal_sets_initialized, "Already initialized"); 1125 // Fill in signals that are necessarily unblocked for all threads in 1126 // the VM. Currently, we unblock the following signals: 1127 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1128 // by -Xrs (=ReduceSignalUsage)); 1129 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1130 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1131 // the dispositions or masks wrt these signals. 1132 // Programs embedding the VM that want to use the above signals for their 1133 // own purposes must, at this time, use the "-Xrs" option to prevent 1134 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1135 // (See bug 4345157, and other related bugs). 1136 // In reality, though, unblocking these signals is really a nop, since 1137 // these signals are not blocked by default. 1138 sigemptyset(&unblocked_sigs); 1139 sigemptyset(&allowdebug_blocked_sigs); 1140 sigaddset(&unblocked_sigs, SIGILL); 1141 sigaddset(&unblocked_sigs, SIGSEGV); 1142 sigaddset(&unblocked_sigs, SIGBUS); 1143 sigaddset(&unblocked_sigs, SIGFPE); 1144 1145 if (isJVM1available) { 1146 os::Solaris::set_SIGinterrupt(SIGJVM1); 1147 os::Solaris::set_SIGasync(SIGJVM2); 1148 } else if (UseAltSigs) { 1149 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1150 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1151 } else { 1152 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1153 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1154 } 1155 1156 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1157 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1158 1159 if (!ReduceSignalUsage) { 1160 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1161 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1162 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1163 } 1164 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1165 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1166 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1167 } 1168 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1169 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1170 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1171 } 1172 } 1173 // Fill in signals that are blocked by all but the VM thread. 1174 sigemptyset(&vm_sigs); 1175 if (!ReduceSignalUsage) 1176 sigaddset(&vm_sigs, BREAK_SIGNAL); 1177 debug_only(signal_sets_initialized = true); 1178 1179 // For diagnostics only used in run_periodic_checks 1180 sigemptyset(&check_signal_done); 1181} 1182 1183// These are signals that are unblocked while a thread is running Java. 1184// (For some reason, they get blocked by default.) 1185sigset_t* os::Solaris::unblocked_signals() { 1186 assert(signal_sets_initialized, "Not initialized"); 1187 return &unblocked_sigs; 1188} 1189 1190// These are the signals that are blocked while a (non-VM) thread is 1191// running Java. Only the VM thread handles these signals. 1192sigset_t* os::Solaris::vm_signals() { 1193 assert(signal_sets_initialized, "Not initialized"); 1194 return &vm_sigs; 1195} 1196 1197// These are signals that are blocked during cond_wait to allow debugger in 1198sigset_t* os::Solaris::allowdebug_blocked_signals() { 1199 assert(signal_sets_initialized, "Not initialized"); 1200 return &allowdebug_blocked_sigs; 1201} 1202 1203 1204void _handle_uncaught_cxx_exception() { 1205 VMError err("An uncaught C++ exception"); 1206 err.report_and_die(); 1207} 1208 1209 1210// First crack at OS-specific initialization, from inside the new thread. 1211void os::initialize_thread(Thread* thr) { 1212 int r = thr_main(); 1213 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 1214 if (r) { 1215 JavaThread* jt = (JavaThread *)thr; 1216 assert(jt != NULL, "Sanity check"); 1217 size_t stack_size; 1218 address base = jt->stack_base(); 1219 if (Arguments::created_by_java_launcher()) { 1220 // Use 2MB to allow for Solaris 7 64 bit mode. 1221 stack_size = JavaThread::stack_size_at_create() == 0 1222 ? 2048*K : JavaThread::stack_size_at_create(); 1223 1224 // There are rare cases when we may have already used more than 1225 // the basic stack size allotment before this method is invoked. 1226 // Attempt to allow for a normally sized java_stack. 1227 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1228 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1229 } else { 1230 // 6269555: If we were not created by a Java launcher, i.e. if we are 1231 // running embedded in a native application, treat the primordial thread 1232 // as much like a native attached thread as possible. This means using 1233 // the current stack size from thr_stksegment(), unless it is too large 1234 // to reliably setup guard pages. A reasonable max size is 8MB. 1235 size_t current_size = current_stack_size(); 1236 // This should never happen, but just in case.... 1237 if (current_size == 0) current_size = 2 * K * K; 1238 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1239 } 1240 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1241 stack_size = (size_t)(base - bottom); 1242 1243 assert(stack_size > 0, "Stack size calculation problem"); 1244 1245 if (stack_size > jt->stack_size()) { 1246 NOT_PRODUCT( 1247 struct rlimit limits; 1248 getrlimit(RLIMIT_STACK, &limits); 1249 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1250 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1251 ) 1252 tty->print_cr( 1253 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1254 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1255 "See limit(1) to increase the stack size limit.", 1256 stack_size / K, jt->stack_size() / K); 1257 vm_exit(1); 1258 } 1259 assert(jt->stack_size() >= stack_size, 1260 "Attempt to map more stack than was allocated"); 1261 jt->set_stack_size(stack_size); 1262 } 1263 1264 // With the T2 libthread (T1 is no longer supported) threads are always bound 1265 // and we use stackbanging in all cases. 1266 1267 os::Solaris::init_thread_fpu_state(); 1268 std::set_terminate(_handle_uncaught_cxx_exception); 1269} 1270 1271 1272 1273// Free Solaris resources related to the OSThread 1274void os::free_thread(OSThread* osthread) { 1275 assert(osthread != NULL, "os::free_thread but osthread not set"); 1276 1277 1278 // We are told to free resources of the argument thread, 1279 // but we can only really operate on the current thread. 1280 // The main thread must take the VMThread down synchronously 1281 // before the main thread exits and frees up CodeHeap 1282 guarantee((Thread::current()->osthread() == osthread 1283 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1284 if (Thread::current()->osthread() == osthread) { 1285 // Restore caller's signal mask 1286 sigset_t sigmask = osthread->caller_sigmask(); 1287 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1288 } 1289 delete osthread; 1290} 1291 1292void os::pd_start_thread(Thread* thread) { 1293 int status = thr_continue(thread->osthread()->thread_id()); 1294 assert_status(status == 0, status, "thr_continue failed"); 1295} 1296 1297 1298intx os::current_thread_id() { 1299 return (intx)thr_self(); 1300} 1301 1302static pid_t _initial_pid = 0; 1303 1304int os::current_process_id() { 1305 return (int)(_initial_pid ? _initial_pid : getpid()); 1306} 1307 1308int os::allocate_thread_local_storage() { 1309 // %%% in Win32 this allocates a memory segment pointed to by a 1310 // register. Dan Stein can implement a similar feature in 1311 // Solaris. Alternatively, the VM can do the same thing 1312 // explicitly: malloc some storage and keep the pointer in a 1313 // register (which is part of the thread's context) (or keep it 1314 // in TLS). 1315 // %%% In current versions of Solaris, thr_self and TSD can 1316 // be accessed via short sequences of displaced indirections. 1317 // The value of thr_self is available as %g7(36). 1318 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1319 // assuming that the current thread already has a value bound to k. 1320 // It may be worth experimenting with such access patterns, 1321 // and later having the parameters formally exported from a Solaris 1322 // interface. I think, however, that it will be faster to 1323 // maintain the invariant that %g2 always contains the 1324 // JavaThread in Java code, and have stubs simply 1325 // treat %g2 as a caller-save register, preserving it in a %lN. 1326 thread_key_t tk; 1327 if (thr_keycreate( &tk, NULL)) 1328 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed " 1329 "(%s)", strerror(errno))); 1330 return int(tk); 1331} 1332 1333void os::free_thread_local_storage(int index) { 1334 // %%% don't think we need anything here 1335 // if ( pthread_key_delete((pthread_key_t) tk) ) 1336 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1337} 1338 1339#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1340 // small number - point is NO swap space available 1341void os::thread_local_storage_at_put(int index, void* value) { 1342 // %%% this is used only in threadLocalStorage.cpp 1343 if (thr_setspecific((thread_key_t)index, value)) { 1344 if (errno == ENOMEM) { 1345 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR, 1346 "thr_setspecific: out of swap space"); 1347 } else { 1348 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed " 1349 "(%s)", strerror(errno))); 1350 } 1351 } else { 1352 ThreadLocalStorage::set_thread_in_slot((Thread *) value); 1353 } 1354} 1355 1356// This function could be called before TLS is initialized, for example, when 1357// VM receives an async signal or when VM causes a fatal error during 1358// initialization. Return NULL if thr_getspecific() fails. 1359void* os::thread_local_storage_at(int index) { 1360 // %%% this is used only in threadLocalStorage.cpp 1361 void* r = NULL; 1362 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1363} 1364 1365 1366// gethrtime() should be monotonic according to the documentation, 1367// but some virtualized platforms are known to break this guarantee. 1368// getTimeNanos() must be guaranteed not to move backwards, so we 1369// are forced to add a check here. 1370inline hrtime_t getTimeNanos() { 1371 const hrtime_t now = gethrtime(); 1372 const hrtime_t prev = max_hrtime; 1373 if (now <= prev) { 1374 return prev; // same or retrograde time; 1375 } 1376 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1377 assert(obsv >= prev, "invariant"); // Monotonicity 1378 // If the CAS succeeded then we're done and return "now". 1379 // If the CAS failed and the observed value "obsv" is >= now then 1380 // we should return "obsv". If the CAS failed and now > obsv > prv then 1381 // some other thread raced this thread and installed a new value, in which case 1382 // we could either (a) retry the entire operation, (b) retry trying to install now 1383 // or (c) just return obsv. We use (c). No loop is required although in some cases 1384 // we might discard a higher "now" value in deference to a slightly lower but freshly 1385 // installed obsv value. That's entirely benign -- it admits no new orderings compared 1386 // to (a) or (b) -- and greatly reduces coherence traffic. 1387 // We might also condition (c) on the magnitude of the delta between obsv and now. 1388 // Avoiding excessive CAS operations to hot RW locations is critical. 1389 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate 1390 return (prev == obsv) ? now : obsv; 1391} 1392 1393// Time since start-up in seconds to a fine granularity. 1394// Used by VMSelfDestructTimer and the MemProfiler. 1395double os::elapsedTime() { 1396 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1397} 1398 1399jlong os::elapsed_counter() { 1400 return (jlong)(getTimeNanos() - first_hrtime); 1401} 1402 1403jlong os::elapsed_frequency() { 1404 return hrtime_hz; 1405} 1406 1407// Return the real, user, and system times in seconds from an 1408// arbitrary fixed point in the past. 1409bool os::getTimesSecs(double* process_real_time, 1410 double* process_user_time, 1411 double* process_system_time) { 1412 struct tms ticks; 1413 clock_t real_ticks = times(&ticks); 1414 1415 if (real_ticks == (clock_t) (-1)) { 1416 return false; 1417 } else { 1418 double ticks_per_second = (double) clock_tics_per_sec; 1419 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1420 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1421 // For consistency return the real time from getTimeNanos() 1422 // converted to seconds. 1423 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1424 1425 return true; 1426 } 1427} 1428 1429bool os::supports_vtime() { return true; } 1430 1431bool os::enable_vtime() { 1432 int fd = ::open("/proc/self/ctl", O_WRONLY); 1433 if (fd == -1) 1434 return false; 1435 1436 long cmd[] = { PCSET, PR_MSACCT }; 1437 int res = ::write(fd, cmd, sizeof(long) * 2); 1438 ::close(fd); 1439 if (res != sizeof(long) * 2) 1440 return false; 1441 1442 return true; 1443} 1444 1445bool os::vtime_enabled() { 1446 int fd = ::open("/proc/self/status", O_RDONLY); 1447 if (fd == -1) 1448 return false; 1449 1450 pstatus_t status; 1451 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1452 ::close(fd); 1453 if (res != sizeof(pstatus_t)) 1454 return false; 1455 1456 return status.pr_flags & PR_MSACCT; 1457} 1458 1459double os::elapsedVTime() { 1460 return (double)gethrvtime() / (double)hrtime_hz; 1461} 1462 1463// Used internally for comparisons only 1464// getTimeMillis guaranteed to not move backwards on Solaris 1465jlong getTimeMillis() { 1466 jlong nanotime = getTimeNanos(); 1467 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1468} 1469 1470// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1471jlong os::javaTimeMillis() { 1472 timeval t; 1473 if (gettimeofday( &t, NULL) == -1) 1474 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno))); 1475 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1476} 1477 1478jlong os::javaTimeNanos() { 1479 return (jlong)getTimeNanos(); 1480} 1481 1482void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1483 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1484 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1485 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1486 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1487} 1488 1489char * os::local_time_string(char *buf, size_t buflen) { 1490 struct tm t; 1491 time_t long_time; 1492 time(&long_time); 1493 localtime_r(&long_time, &t); 1494 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1495 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1496 t.tm_hour, t.tm_min, t.tm_sec); 1497 return buf; 1498} 1499 1500// Note: os::shutdown() might be called very early during initialization, or 1501// called from signal handler. Before adding something to os::shutdown(), make 1502// sure it is async-safe and can handle partially initialized VM. 1503void os::shutdown() { 1504 1505 // allow PerfMemory to attempt cleanup of any persistent resources 1506 perfMemory_exit(); 1507 1508 // needs to remove object in file system 1509 AttachListener::abort(); 1510 1511 // flush buffered output, finish log files 1512 ostream_abort(); 1513 1514 // Check for abort hook 1515 abort_hook_t abort_hook = Arguments::abort_hook(); 1516 if (abort_hook != NULL) { 1517 abort_hook(); 1518 } 1519} 1520 1521// Note: os::abort() might be called very early during initialization, or 1522// called from signal handler. Before adding something to os::abort(), make 1523// sure it is async-safe and can handle partially initialized VM. 1524void os::abort(bool dump_core) { 1525 os::shutdown(); 1526 if (dump_core) { 1527#ifndef PRODUCT 1528 fdStream out(defaultStream::output_fd()); 1529 out.print_raw("Current thread is "); 1530 char buf[16]; 1531 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1532 out.print_raw_cr(buf); 1533 out.print_raw_cr("Dumping core ..."); 1534#endif 1535 ::abort(); // dump core (for debugging) 1536 } 1537 1538 ::exit(1); 1539} 1540 1541// Die immediately, no exit hook, no abort hook, no cleanup. 1542void os::die() { 1543 ::abort(); // dump core (for debugging) 1544} 1545 1546// unused 1547void os::set_error_file(const char *logfile) {} 1548 1549// DLL functions 1550 1551const char* os::dll_file_extension() { return ".so"; } 1552 1553// This must be hard coded because it's the system's temporary 1554// directory not the java application's temp directory, ala java.io.tmpdir. 1555const char* os::get_temp_directory() { return "/tmp"; } 1556 1557static bool file_exists(const char* filename) { 1558 struct stat statbuf; 1559 if (filename == NULL || strlen(filename) == 0) { 1560 return false; 1561 } 1562 return os::stat(filename, &statbuf) == 0; 1563} 1564 1565bool os::dll_build_name(char* buffer, size_t buflen, 1566 const char* pname, const char* fname) { 1567 bool retval = false; 1568 const size_t pnamelen = pname ? strlen(pname) : 0; 1569 1570 // Return error on buffer overflow. 1571 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1572 return retval; 1573 } 1574 1575 if (pnamelen == 0) { 1576 snprintf(buffer, buflen, "lib%s.so", fname); 1577 retval = true; 1578 } else if (strchr(pname, *os::path_separator()) != NULL) { 1579 int n; 1580 char** pelements = split_path(pname, &n); 1581 if (pelements == NULL) { 1582 return false; 1583 } 1584 for (int i = 0; i < n; i++) { 1585 // really shouldn't be NULL but what the heck, check can't hurt 1586 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1587 continue; // skip the empty path values 1588 } 1589 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1590 if (file_exists(buffer)) { 1591 retval = true; 1592 break; 1593 } 1594 } 1595 // release the storage 1596 for (int i = 0; i < n; i++) { 1597 if (pelements[i] != NULL) { 1598 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); 1599 } 1600 } 1601 if (pelements != NULL) { 1602 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); 1603 } 1604 } else { 1605 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1606 retval = true; 1607 } 1608 return retval; 1609} 1610 1611// check if addr is inside libjvm.so 1612bool os::address_is_in_vm(address addr) { 1613 static address libjvm_base_addr; 1614 Dl_info dlinfo; 1615 1616 if (libjvm_base_addr == NULL) { 1617 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { 1618 libjvm_base_addr = (address)dlinfo.dli_fbase; 1619 } 1620 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1621 } 1622 1623 if (dladdr((void *)addr, &dlinfo) != 0) { 1624 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1625 } 1626 1627 return false; 1628} 1629 1630typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1631static dladdr1_func_type dladdr1_func = NULL; 1632 1633bool os::dll_address_to_function_name(address addr, char *buf, 1634 int buflen, int * offset) { 1635 // buf is not optional, but offset is optional 1636 assert(buf != NULL, "sanity check"); 1637 1638 Dl_info dlinfo; 1639 1640 // dladdr1_func was initialized in os::init() 1641 if (dladdr1_func != NULL) { 1642 // yes, we have dladdr1 1643 1644 // Support for dladdr1 is checked at runtime; it may be 1645 // available even if the vm is built on a machine that does 1646 // not have dladdr1 support. Make sure there is a value for 1647 // RTLD_DL_SYMENT. 1648 #ifndef RTLD_DL_SYMENT 1649 #define RTLD_DL_SYMENT 1 1650 #endif 1651#ifdef _LP64 1652 Elf64_Sym * info; 1653#else 1654 Elf32_Sym * info; 1655#endif 1656 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1657 RTLD_DL_SYMENT) != 0) { 1658 // see if we have a matching symbol that covers our address 1659 if (dlinfo.dli_saddr != NULL && 1660 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1661 if (dlinfo.dli_sname != NULL) { 1662 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { 1663 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1664 } 1665 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1666 return true; 1667 } 1668 } 1669 // no matching symbol so try for just file info 1670 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1671 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1672 buf, buflen, offset, dlinfo.dli_fname)) { 1673 return true; 1674 } 1675 } 1676 } 1677 buf[0] = '\0'; 1678 if (offset != NULL) *offset = -1; 1679 return false; 1680 } 1681 1682 // no, only dladdr is available 1683 if (dladdr((void *)addr, &dlinfo) != 0) { 1684 // see if we have a matching symbol 1685 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { 1686 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { 1687 jio_snprintf(buf, buflen, dlinfo.dli_sname); 1688 } 1689 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1690 return true; 1691 } 1692 // no matching symbol so try for just file info 1693 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1694 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1695 buf, buflen, offset, dlinfo.dli_fname)) { 1696 return true; 1697 } 1698 } 1699 } 1700 buf[0] = '\0'; 1701 if (offset != NULL) *offset = -1; 1702 return false; 1703} 1704 1705bool os::dll_address_to_library_name(address addr, char* buf, 1706 int buflen, int* offset) { 1707 // buf is not optional, but offset is optional 1708 assert(buf != NULL, "sanity check"); 1709 1710 Dl_info dlinfo; 1711 1712 if (dladdr((void*)addr, &dlinfo) != 0) { 1713 if (dlinfo.dli_fname != NULL) { 1714 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1715 } 1716 if (dlinfo.dli_fbase != NULL && offset != NULL) { 1717 *offset = addr - (address)dlinfo.dli_fbase; 1718 } 1719 return true; 1720 } 1721 1722 buf[0] = '\0'; 1723 if (offset) *offset = -1; 1724 return false; 1725} 1726 1727// Prints the names and full paths of all opened dynamic libraries 1728// for current process 1729void os::print_dll_info(outputStream * st) { 1730 Dl_info dli; 1731 void *handle; 1732 Link_map *map; 1733 Link_map *p; 1734 1735 st->print_cr("Dynamic libraries:"); st->flush(); 1736 1737 if (dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli) == 0 || 1738 dli.dli_fname == NULL) { 1739 st->print_cr("Error: Cannot print dynamic libraries."); 1740 return; 1741 } 1742 handle = dlopen(dli.dli_fname, RTLD_LAZY); 1743 if (handle == NULL) { 1744 st->print_cr("Error: Cannot print dynamic libraries."); 1745 return; 1746 } 1747 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1748 if (map == NULL) { 1749 st->print_cr("Error: Cannot print dynamic libraries."); 1750 return; 1751 } 1752 1753 while (map->l_prev != NULL) 1754 map = map->l_prev; 1755 1756 while (map != NULL) { 1757 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 1758 map = map->l_next; 1759 } 1760 1761 dlclose(handle); 1762} 1763 1764 // Loads .dll/.so and 1765 // in case of error it checks if .dll/.so was built for the 1766 // same architecture as Hotspot is running on 1767 1768void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 1769{ 1770 void * result= ::dlopen(filename, RTLD_LAZY); 1771 if (result != NULL) { 1772 // Successful loading 1773 return result; 1774 } 1775 1776 Elf32_Ehdr elf_head; 1777 1778 // Read system error message into ebuf 1779 // It may or may not be overwritten below 1780 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1781 ebuf[ebuflen-1]='\0'; 1782 int diag_msg_max_length=ebuflen-strlen(ebuf); 1783 char* diag_msg_buf=ebuf+strlen(ebuf); 1784 1785 if (diag_msg_max_length==0) { 1786 // No more space in ebuf for additional diagnostics message 1787 return NULL; 1788 } 1789 1790 1791 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1792 1793 if (file_descriptor < 0) { 1794 // Can't open library, report dlerror() message 1795 return NULL; 1796 } 1797 1798 bool failed_to_read_elf_head= 1799 (sizeof(elf_head)!= 1800 (::read(file_descriptor, &elf_head,sizeof(elf_head)))); 1801 1802 ::close(file_descriptor); 1803 if (failed_to_read_elf_head) { 1804 // file i/o error - report dlerror() msg 1805 return NULL; 1806 } 1807 1808 typedef struct { 1809 Elf32_Half code; // Actual value as defined in elf.h 1810 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1811 char elf_class; // 32 or 64 bit 1812 char endianess; // MSB or LSB 1813 char* name; // String representation 1814 } arch_t; 1815 1816 static const arch_t arch_array[]={ 1817 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1818 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1819 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1820 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1821 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1822 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1823 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1824 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1825 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 1826 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 1827 }; 1828 1829 #if (defined IA32) 1830 static Elf32_Half running_arch_code=EM_386; 1831 #elif (defined AMD64) 1832 static Elf32_Half running_arch_code=EM_X86_64; 1833 #elif (defined IA64) 1834 static Elf32_Half running_arch_code=EM_IA_64; 1835 #elif (defined __sparc) && (defined _LP64) 1836 static Elf32_Half running_arch_code=EM_SPARCV9; 1837 #elif (defined __sparc) && (!defined _LP64) 1838 static Elf32_Half running_arch_code=EM_SPARC; 1839 #elif (defined __powerpc64__) 1840 static Elf32_Half running_arch_code=EM_PPC64; 1841 #elif (defined __powerpc__) 1842 static Elf32_Half running_arch_code=EM_PPC; 1843 #elif (defined ARM) 1844 static Elf32_Half running_arch_code=EM_ARM; 1845 #else 1846 #error Method os::dll_load requires that one of following is defined:\ 1847 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 1848 #endif 1849 1850 // Identify compatability class for VM's architecture and library's architecture 1851 // Obtain string descriptions for architectures 1852 1853 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1854 int running_arch_index=-1; 1855 1856 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) { 1857 if (running_arch_code == arch_array[i].code) { 1858 running_arch_index = i; 1859 } 1860 if (lib_arch.code == arch_array[i].code) { 1861 lib_arch.compat_class = arch_array[i].compat_class; 1862 lib_arch.name = arch_array[i].name; 1863 } 1864 } 1865 1866 assert(running_arch_index != -1, 1867 "Didn't find running architecture code (running_arch_code) in arch_array"); 1868 if (running_arch_index == -1) { 1869 // Even though running architecture detection failed 1870 // we may still continue with reporting dlerror() message 1871 return NULL; 1872 } 1873 1874 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 1875 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 1876 return NULL; 1877 } 1878 1879 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 1880 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 1881 return NULL; 1882 } 1883 1884 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 1885 if (lib_arch.name!=NULL) { 1886 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1887 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 1888 lib_arch.name, arch_array[running_arch_index].name); 1889 } else { 1890 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1891 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 1892 lib_arch.code, 1893 arch_array[running_arch_index].name); 1894 } 1895 } 1896 1897 return NULL; 1898} 1899 1900void* os::dll_lookup(void* handle, const char* name) { 1901 return dlsym(handle, name); 1902} 1903 1904void* os::get_default_process_handle() { 1905 return (void*)::dlopen(NULL, RTLD_LAZY); 1906} 1907 1908int os::stat(const char *path, struct stat *sbuf) { 1909 char pathbuf[MAX_PATH]; 1910 if (strlen(path) > MAX_PATH - 1) { 1911 errno = ENAMETOOLONG; 1912 return -1; 1913 } 1914 os::native_path(strcpy(pathbuf, path)); 1915 return ::stat(pathbuf, sbuf); 1916} 1917 1918static bool _print_ascii_file(const char* filename, outputStream* st) { 1919 int fd = ::open(filename, O_RDONLY); 1920 if (fd == -1) { 1921 return false; 1922 } 1923 1924 char buf[32]; 1925 int bytes; 1926 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 1927 st->print_raw(buf, bytes); 1928 } 1929 1930 ::close(fd); 1931 1932 return true; 1933} 1934 1935void os::print_os_info_brief(outputStream* st) { 1936 os::Solaris::print_distro_info(st); 1937 1938 os::Posix::print_uname_info(st); 1939 1940 os::Solaris::print_libversion_info(st); 1941} 1942 1943void os::print_os_info(outputStream* st) { 1944 st->print("OS:"); 1945 1946 os::Solaris::print_distro_info(st); 1947 1948 os::Posix::print_uname_info(st); 1949 1950 os::Solaris::print_libversion_info(st); 1951 1952 os::Posix::print_rlimit_info(st); 1953 1954 os::Posix::print_load_average(st); 1955} 1956 1957void os::Solaris::print_distro_info(outputStream* st) { 1958 if (!_print_ascii_file("/etc/release", st)) { 1959 st->print("Solaris"); 1960 } 1961 st->cr(); 1962} 1963 1964void os::Solaris::print_libversion_info(outputStream* st) { 1965 st->print(" (T2 libthread)"); 1966 st->cr(); 1967} 1968 1969static bool check_addr0(outputStream* st) { 1970 jboolean status = false; 1971 int fd = ::open("/proc/self/map",O_RDONLY); 1972 if (fd >= 0) { 1973 prmap_t p; 1974 while (::read(fd, &p, sizeof(p)) > 0) { 1975 if (p.pr_vaddr == 0x0) { 1976 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 1977 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 1978 st->print("Access:"); 1979 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 1980 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 1981 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 1982 st->cr(); 1983 status = true; 1984 } 1985 } 1986 ::close(fd); 1987 } 1988 return status; 1989} 1990 1991void os::pd_print_cpu_info(outputStream* st) { 1992 // Nothing to do for now. 1993} 1994 1995void os::print_memory_info(outputStream* st) { 1996 st->print("Memory:"); 1997 st->print(" %dk page", os::vm_page_size()>>10); 1998 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 1999 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2000 st->cr(); 2001 (void) check_addr0(st); 2002} 2003 2004void os::print_siginfo(outputStream* st, void* siginfo) { 2005 const siginfo_t* si = (const siginfo_t*)siginfo; 2006 2007 os::Posix::print_siginfo_brief(st, si); 2008 2009 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2010 UseSharedSpaces) { 2011 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2012 if (mapinfo->is_in_shared_space(si->si_addr)) { 2013 st->print("\n\nError accessing class data sharing archive." \ 2014 " Mapped file inaccessible during execution, " \ 2015 " possible disk/network problem."); 2016 } 2017 } 2018 st->cr(); 2019} 2020 2021// Moved from whole group, because we need them here for diagnostic 2022// prints. 2023#define OLDMAXSIGNUM 32 2024static int Maxsignum = 0; 2025static int *ourSigFlags = NULL; 2026 2027extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2028 2029int os::Solaris::get_our_sigflags(int sig) { 2030 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2031 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2032 return ourSigFlags[sig]; 2033} 2034 2035void os::Solaris::set_our_sigflags(int sig, int flags) { 2036 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2037 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2038 ourSigFlags[sig] = flags; 2039} 2040 2041 2042static const char* get_signal_handler_name(address handler, 2043 char* buf, int buflen) { 2044 int offset; 2045 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2046 if (found) { 2047 // skip directory names 2048 const char *p1, *p2; 2049 p1 = buf; 2050 size_t len = strlen(os::file_separator()); 2051 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2052 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2053 } else { 2054 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2055 } 2056 return buf; 2057} 2058 2059static void print_signal_handler(outputStream* st, int sig, 2060 char* buf, size_t buflen) { 2061 struct sigaction sa; 2062 2063 sigaction(sig, NULL, &sa); 2064 2065 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2066 2067 address handler = (sa.sa_flags & SA_SIGINFO) 2068 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2069 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2070 2071 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2072 st->print("SIG_DFL"); 2073 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2074 st->print("SIG_IGN"); 2075 } else { 2076 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2077 } 2078 2079 st->print(", sa_mask[0]="); 2080 os::Posix::print_signal_set_short(st, &sa.sa_mask); 2081 2082 address rh = VMError::get_resetted_sighandler(sig); 2083 // May be, handler was resetted by VMError? 2084 if (rh != NULL) { 2085 handler = rh; 2086 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2087 } 2088 2089 st->print(", sa_flags="); 2090 os::Posix::print_sa_flags(st, sa.sa_flags); 2091 2092 // Check: is it our handler? 2093 if (handler == CAST_FROM_FN_PTR(address, signalHandler) || 2094 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2095 // It is our signal handler 2096 // check for flags 2097 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2098 st->print( 2099 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2100 os::Solaris::get_our_sigflags(sig)); 2101 } 2102 } 2103 st->cr(); 2104} 2105 2106void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2107 st->print_cr("Signal Handlers:"); 2108 print_signal_handler(st, SIGSEGV, buf, buflen); 2109 print_signal_handler(st, SIGBUS , buf, buflen); 2110 print_signal_handler(st, SIGFPE , buf, buflen); 2111 print_signal_handler(st, SIGPIPE, buf, buflen); 2112 print_signal_handler(st, SIGXFSZ, buf, buflen); 2113 print_signal_handler(st, SIGILL , buf, buflen); 2114 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2115 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2116 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2117 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2118 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2119 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2120 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2121 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2122} 2123 2124static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2125 2126// Find the full path to the current module, libjvm.so 2127void os::jvm_path(char *buf, jint buflen) { 2128 // Error checking. 2129 if (buflen < MAXPATHLEN) { 2130 assert(false, "must use a large-enough buffer"); 2131 buf[0] = '\0'; 2132 return; 2133 } 2134 // Lazy resolve the path to current module. 2135 if (saved_jvm_path[0] != 0) { 2136 strcpy(buf, saved_jvm_path); 2137 return; 2138 } 2139 2140 Dl_info dlinfo; 2141 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2142 assert(ret != 0, "cannot locate libjvm"); 2143 if (ret != 0 && dlinfo.dli_fname != NULL) { 2144 realpath((char *)dlinfo.dli_fname, buf); 2145 } else { 2146 buf[0] = '\0'; 2147 return; 2148 } 2149 2150 if (Arguments::sun_java_launcher_is_altjvm()) { 2151 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical 2152 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". 2153 // If "/jre/lib/" appears at the right place in the string, then 2154 // assume we are installed in a JDK and we're done. Otherwise, check 2155 // for a JAVA_HOME environment variable and fix up the path so it 2156 // looks like libjvm.so is installed there (append a fake suffix 2157 // hotspot/libjvm.so). 2158 const char *p = buf + strlen(buf) - 1; 2159 for (int count = 0; p > buf && count < 5; ++count) { 2160 for (--p; p > buf && *p != '/'; --p) 2161 /* empty */ ; 2162 } 2163 2164 if (strncmp(p, "/jre/lib/", 9) != 0) { 2165 // Look for JAVA_HOME in the environment. 2166 char* java_home_var = ::getenv("JAVA_HOME"); 2167 if (java_home_var != NULL && java_home_var[0] != 0) { 2168 char cpu_arch[12]; 2169 char* jrelib_p; 2170 int len; 2171 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2172#ifdef _LP64 2173 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2174 if (strcmp(cpu_arch, "sparc") == 0) { 2175 strcat(cpu_arch, "v9"); 2176 } else if (strcmp(cpu_arch, "i386") == 0) { 2177 strcpy(cpu_arch, "amd64"); 2178 } 2179#endif 2180 // Check the current module name "libjvm.so". 2181 p = strrchr(buf, '/'); 2182 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2183 2184 realpath(java_home_var, buf); 2185 // determine if this is a legacy image or modules image 2186 // modules image doesn't have "jre" subdirectory 2187 len = strlen(buf); 2188 jrelib_p = buf + len; 2189 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2190 if (0 != access(buf, F_OK)) { 2191 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2192 } 2193 2194 if (0 == access(buf, F_OK)) { 2195 // Use current module name "libjvm.so" 2196 len = strlen(buf); 2197 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2198 } else { 2199 // Go back to path of .so 2200 realpath((char *)dlinfo.dli_fname, buf); 2201 } 2202 } 2203 } 2204 } 2205 2206 strcpy(saved_jvm_path, buf); 2207} 2208 2209 2210void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2211 // no prefix required, not even "_" 2212} 2213 2214 2215void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2216 // no suffix required 2217} 2218 2219// This method is a copy of JDK's sysGetLastErrorString 2220// from src/solaris/hpi/src/system_md.c 2221 2222size_t os::lasterror(char *buf, size_t len) { 2223 2224 if (errno == 0) return 0; 2225 2226 const char *s = ::strerror(errno); 2227 size_t n = ::strlen(s); 2228 if (n >= len) { 2229 n = len - 1; 2230 } 2231 ::strncpy(buf, s, n); 2232 buf[n] = '\0'; 2233 return n; 2234} 2235 2236 2237// sun.misc.Signal 2238 2239extern "C" { 2240 static void UserHandler(int sig, void *siginfo, void *context) { 2241 // Ctrl-C is pressed during error reporting, likely because the error 2242 // handler fails to abort. Let VM die immediately. 2243 if (sig == SIGINT && is_error_reported()) { 2244 os::die(); 2245 } 2246 2247 os::signal_notify(sig); 2248 // We do not need to reinstate the signal handler each time... 2249 } 2250} 2251 2252void* os::user_handler() { 2253 return CAST_FROM_FN_PTR(void*, UserHandler); 2254} 2255 2256class Semaphore : public StackObj { 2257 public: 2258 Semaphore(); 2259 ~Semaphore(); 2260 void signal(); 2261 void wait(); 2262 bool trywait(); 2263 bool timedwait(unsigned int sec, int nsec); 2264 private: 2265 sema_t _semaphore; 2266}; 2267 2268 2269Semaphore::Semaphore() { 2270 sema_init(&_semaphore, 0, NULL, NULL); 2271} 2272 2273Semaphore::~Semaphore() { 2274 sema_destroy(&_semaphore); 2275} 2276 2277void Semaphore::signal() { 2278 sema_post(&_semaphore); 2279} 2280 2281void Semaphore::wait() { 2282 sema_wait(&_semaphore); 2283} 2284 2285bool Semaphore::trywait() { 2286 return sema_trywait(&_semaphore) == 0; 2287} 2288 2289bool Semaphore::timedwait(unsigned int sec, int nsec) { 2290 struct timespec ts; 2291 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2292 2293 while (1) { 2294 int result = sema_timedwait(&_semaphore, &ts); 2295 if (result == 0) { 2296 return true; 2297 } else if (errno == EINTR) { 2298 continue; 2299 } else if (errno == ETIME) { 2300 return false; 2301 } else { 2302 return false; 2303 } 2304 } 2305} 2306 2307extern "C" { 2308 typedef void (*sa_handler_t)(int); 2309 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2310} 2311 2312void* os::signal(int signal_number, void* handler) { 2313 struct sigaction sigAct, oldSigAct; 2314 sigfillset(&(sigAct.sa_mask)); 2315 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2316 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2317 2318 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2319 // -1 means registration failed 2320 return (void *)-1; 2321 2322 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2323} 2324 2325void os::signal_raise(int signal_number) { 2326 raise(signal_number); 2327} 2328 2329/* 2330 * The following code is moved from os.cpp for making this 2331 * code platform specific, which it is by its very nature. 2332 */ 2333 2334// a counter for each possible signal value 2335static int Sigexit = 0; 2336static int Maxlibjsigsigs; 2337static jint *pending_signals = NULL; 2338static int *preinstalled_sigs = NULL; 2339static struct sigaction *chainedsigactions = NULL; 2340static sema_t sig_sem; 2341typedef int (*version_getting_t)(); 2342version_getting_t os::Solaris::get_libjsig_version = NULL; 2343static int libjsigversion = NULL; 2344 2345int os::sigexitnum_pd() { 2346 assert(Sigexit > 0, "signal memory not yet initialized"); 2347 return Sigexit; 2348} 2349 2350void os::Solaris::init_signal_mem() { 2351 // Initialize signal structures 2352 Maxsignum = SIGRTMAX; 2353 Sigexit = Maxsignum+1; 2354 assert(Maxsignum >0, "Unable to obtain max signal number"); 2355 2356 Maxlibjsigsigs = Maxsignum; 2357 2358 // pending_signals has one int per signal 2359 // The additional signal is for SIGEXIT - exit signal to signal_thread 2360 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2361 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2362 2363 if (UseSignalChaining) { 2364 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2365 * (Maxsignum + 1), mtInternal); 2366 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2367 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2368 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2369 } 2370 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal); 2371 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2372} 2373 2374void os::signal_init_pd() { 2375 int ret; 2376 2377 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2378 assert(ret == 0, "sema_init() failed"); 2379} 2380 2381void os::signal_notify(int signal_number) { 2382 int ret; 2383 2384 Atomic::inc(&pending_signals[signal_number]); 2385 ret = ::sema_post(&sig_sem); 2386 assert(ret == 0, "sema_post() failed"); 2387} 2388 2389static int check_pending_signals(bool wait_for_signal) { 2390 int ret; 2391 while (true) { 2392 for (int i = 0; i < Sigexit + 1; i++) { 2393 jint n = pending_signals[i]; 2394 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2395 return i; 2396 } 2397 } 2398 if (!wait_for_signal) { 2399 return -1; 2400 } 2401 JavaThread *thread = JavaThread::current(); 2402 ThreadBlockInVM tbivm(thread); 2403 2404 bool threadIsSuspended; 2405 do { 2406 thread->set_suspend_equivalent(); 2407 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2408 while ((ret = ::sema_wait(&sig_sem)) == EINTR) 2409 ; 2410 assert(ret == 0, "sema_wait() failed"); 2411 2412 // were we externally suspended while we were waiting? 2413 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2414 if (threadIsSuspended) { 2415 // 2416 // The semaphore has been incremented, but while we were waiting 2417 // another thread suspended us. We don't want to continue running 2418 // while suspended because that would surprise the thread that 2419 // suspended us. 2420 // 2421 ret = ::sema_post(&sig_sem); 2422 assert(ret == 0, "sema_post() failed"); 2423 2424 thread->java_suspend_self(); 2425 } 2426 } while (threadIsSuspended); 2427 } 2428} 2429 2430int os::signal_lookup() { 2431 return check_pending_signals(false); 2432} 2433 2434int os::signal_wait() { 2435 return check_pending_signals(true); 2436} 2437 2438//////////////////////////////////////////////////////////////////////////////// 2439// Virtual Memory 2440 2441static int page_size = -1; 2442 2443// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2444// clear this var if support is not available. 2445static bool has_map_align = true; 2446 2447int os::vm_page_size() { 2448 assert(page_size != -1, "must call os::init"); 2449 return page_size; 2450} 2451 2452// Solaris allocates memory by pages. 2453int os::vm_allocation_granularity() { 2454 assert(page_size != -1, "must call os::init"); 2455 return page_size; 2456} 2457 2458static bool recoverable_mmap_error(int err) { 2459 // See if the error is one we can let the caller handle. This 2460 // list of errno values comes from the Solaris mmap(2) man page. 2461 switch (err) { 2462 case EBADF: 2463 case EINVAL: 2464 case ENOTSUP: 2465 // let the caller deal with these errors 2466 return true; 2467 2468 default: 2469 // Any remaining errors on this OS can cause our reserved mapping 2470 // to be lost. That can cause confusion where different data 2471 // structures think they have the same memory mapped. The worst 2472 // scenario is if both the VM and a library think they have the 2473 // same memory mapped. 2474 return false; 2475 } 2476} 2477 2478static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2479 int err) { 2480 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2481 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2482 strerror(err), err); 2483} 2484 2485static void warn_fail_commit_memory(char* addr, size_t bytes, 2486 size_t alignment_hint, bool exec, 2487 int err) { 2488 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2489 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2490 alignment_hint, exec, strerror(err), err); 2491} 2492 2493int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2494 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2495 size_t size = bytes; 2496 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2497 if (res != NULL) { 2498 if (UseNUMAInterleaving) { 2499 numa_make_global(addr, bytes); 2500 } 2501 return 0; 2502 } 2503 2504 int err = errno; // save errno from mmap() call in mmap_chunk() 2505 2506 if (!recoverable_mmap_error(err)) { 2507 warn_fail_commit_memory(addr, bytes, exec, err); 2508 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2509 } 2510 2511 return err; 2512} 2513 2514bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2515 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2516} 2517 2518void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2519 const char* mesg) { 2520 assert(mesg != NULL, "mesg must be specified"); 2521 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2522 if (err != 0) { 2523 // the caller wants all commit errors to exit with the specified mesg: 2524 warn_fail_commit_memory(addr, bytes, exec, err); 2525 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2526 } 2527} 2528 2529int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2530 size_t alignment_hint, bool exec) { 2531 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2532 if (err == 0) { 2533 if (UseLargePages && (alignment_hint > (size_t)vm_page_size())) { 2534 // If the large page size has been set and the VM 2535 // is using large pages, use the large page size 2536 // if it is smaller than the alignment hint. This is 2537 // a case where the VM wants to use a larger alignment size 2538 // for its own reasons but still want to use large pages 2539 // (which is what matters to setting the mpss range. 2540 size_t page_size = 0; 2541 if (large_page_size() < alignment_hint) { 2542 assert(UseLargePages, "Expected to be here for large page use only"); 2543 page_size = large_page_size(); 2544 } else { 2545 // If the alignment hint is less than the large page 2546 // size, the VM wants a particular alignment (thus the hint) 2547 // for internal reasons. Try to set the mpss range using 2548 // the alignment_hint. 2549 page_size = alignment_hint; 2550 } 2551 // Since this is a hint, ignore any failures. 2552 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2553 } 2554 } 2555 return err; 2556} 2557 2558bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2559 bool exec) { 2560 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2561} 2562 2563void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2564 size_t alignment_hint, bool exec, 2565 const char* mesg) { 2566 assert(mesg != NULL, "mesg must be specified"); 2567 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2568 if (err != 0) { 2569 // the caller wants all commit errors to exit with the specified mesg: 2570 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2571 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2572 } 2573} 2574 2575// Uncommit the pages in a specified region. 2576void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2577 if (madvise(addr, bytes, MADV_FREE) < 0) { 2578 debug_only(warning("MADV_FREE failed.")); 2579 return; 2580 } 2581} 2582 2583bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2584 return os::commit_memory(addr, size, !ExecMem); 2585} 2586 2587bool os::remove_stack_guard_pages(char* addr, size_t size) { 2588 return os::uncommit_memory(addr, size); 2589} 2590 2591// Change the page size in a given range. 2592void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2593 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2594 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2595 if (UseLargePages) { 2596 Solaris::setup_large_pages(addr, bytes, alignment_hint); 2597 } 2598} 2599 2600// Tell the OS to make the range local to the first-touching LWP 2601void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2602 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2603 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2604 debug_only(warning("MADV_ACCESS_LWP failed.")); 2605 } 2606} 2607 2608// Tell the OS that this range would be accessed from different LWPs. 2609void os::numa_make_global(char *addr, size_t bytes) { 2610 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2611 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2612 debug_only(warning("MADV_ACCESS_MANY failed.")); 2613 } 2614} 2615 2616// Get the number of the locality groups. 2617size_t os::numa_get_groups_num() { 2618 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2619 return n != -1 ? n : 1; 2620} 2621 2622// Get a list of leaf locality groups. A leaf lgroup is group that 2623// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2624// board. An LWP is assigned to one of these groups upon creation. 2625size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2626 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2627 ids[0] = 0; 2628 return 1; 2629 } 2630 int result_size = 0, top = 1, bottom = 0, cur = 0; 2631 for (int k = 0; k < size; k++) { 2632 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2633 (Solaris::lgrp_id_t*)&ids[top], size - top); 2634 if (r == -1) { 2635 ids[0] = 0; 2636 return 1; 2637 } 2638 if (!r) { 2639 // That's a leaf node. 2640 assert(bottom <= cur, "Sanity check"); 2641 // Check if the node has memory 2642 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2643 NULL, 0, LGRP_RSRC_MEM) > 0) { 2644 ids[bottom++] = ids[cur]; 2645 } 2646 } 2647 top += r; 2648 cur++; 2649 } 2650 if (bottom == 0) { 2651 // Handle a situation, when the OS reports no memory available. 2652 // Assume UMA architecture. 2653 ids[0] = 0; 2654 return 1; 2655 } 2656 return bottom; 2657} 2658 2659// Detect the topology change. Typically happens during CPU plugging-unplugging. 2660bool os::numa_topology_changed() { 2661 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2662 if (is_stale != -1 && is_stale) { 2663 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2664 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2665 assert(c != 0, "Failure to initialize LGRP API"); 2666 Solaris::set_lgrp_cookie(c); 2667 return true; 2668 } 2669 return false; 2670} 2671 2672// Get the group id of the current LWP. 2673int os::numa_get_group_id() { 2674 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2675 if (lgrp_id == -1) { 2676 return 0; 2677 } 2678 const int size = os::numa_get_groups_num(); 2679 int *ids = (int*)alloca(size * sizeof(int)); 2680 2681 // Get the ids of all lgroups with memory; r is the count. 2682 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2683 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2684 if (r <= 0) { 2685 return 0; 2686 } 2687 return ids[os::random() % r]; 2688} 2689 2690// Request information about the page. 2691bool os::get_page_info(char *start, page_info* info) { 2692 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2693 uint64_t addr = (uintptr_t)start; 2694 uint64_t outdata[2]; 2695 uint_t validity = 0; 2696 2697 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2698 return false; 2699 } 2700 2701 info->size = 0; 2702 info->lgrp_id = -1; 2703 2704 if ((validity & 1) != 0) { 2705 if ((validity & 2) != 0) { 2706 info->lgrp_id = outdata[0]; 2707 } 2708 if ((validity & 4) != 0) { 2709 info->size = outdata[1]; 2710 } 2711 return true; 2712 } 2713 return false; 2714} 2715 2716// Scan the pages from start to end until a page different than 2717// the one described in the info parameter is encountered. 2718char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2719 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2720 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2721 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1]; 2722 uint_t validity[MAX_MEMINFO_CNT]; 2723 2724 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2725 uint64_t p = (uint64_t)start; 2726 while (p < (uint64_t)end) { 2727 addrs[0] = p; 2728 size_t addrs_count = 1; 2729 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2730 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2731 addrs_count++; 2732 } 2733 2734 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2735 return NULL; 2736 } 2737 2738 size_t i = 0; 2739 for (; i < addrs_count; i++) { 2740 if ((validity[i] & 1) != 0) { 2741 if ((validity[i] & 4) != 0) { 2742 if (outdata[types * i + 1] != page_expected->size) { 2743 break; 2744 } 2745 } else 2746 if (page_expected->size != 0) { 2747 break; 2748 } 2749 2750 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2751 if (outdata[types * i] != page_expected->lgrp_id) { 2752 break; 2753 } 2754 } 2755 } else { 2756 return NULL; 2757 } 2758 } 2759 2760 if (i < addrs_count) { 2761 if ((validity[i] & 2) != 0) { 2762 page_found->lgrp_id = outdata[types * i]; 2763 } else { 2764 page_found->lgrp_id = -1; 2765 } 2766 if ((validity[i] & 4) != 0) { 2767 page_found->size = outdata[types * i + 1]; 2768 } else { 2769 page_found->size = 0; 2770 } 2771 return (char*)addrs[i]; 2772 } 2773 2774 p = addrs[addrs_count - 1] + page_size; 2775 } 2776 return end; 2777} 2778 2779bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2780 size_t size = bytes; 2781 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2782 // uncommitted page. Otherwise, the read/write might succeed if we 2783 // have enough swap space to back the physical page. 2784 return 2785 NULL != Solaris::mmap_chunk(addr, size, 2786 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2787 PROT_NONE); 2788} 2789 2790char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2791 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2792 2793 if (b == MAP_FAILED) { 2794 return NULL; 2795 } 2796 return b; 2797} 2798 2799char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 2800 char* addr = requested_addr; 2801 int flags = MAP_PRIVATE | MAP_NORESERVE; 2802 2803 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 2804 2805 if (fixed) { 2806 flags |= MAP_FIXED; 2807 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2808 flags |= MAP_ALIGN; 2809 addr = (char*) alignment_hint; 2810 } 2811 2812 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2813 // uncommitted page. Otherwise, the read/write might succeed if we 2814 // have enough swap space to back the physical page. 2815 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2816} 2817 2818char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 2819 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 2820 2821 guarantee(requested_addr == NULL || requested_addr == addr, 2822 "OS failed to return requested mmap address."); 2823 return addr; 2824} 2825 2826// Reserve memory at an arbitrary address, only if that area is 2827// available (and not reserved for something else). 2828 2829char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2830 const int max_tries = 10; 2831 char* base[max_tries]; 2832 size_t size[max_tries]; 2833 2834 // Solaris adds a gap between mmap'ed regions. The size of the gap 2835 // is dependent on the requested size and the MMU. Our initial gap 2836 // value here is just a guess and will be corrected later. 2837 bool had_top_overlap = false; 2838 bool have_adjusted_gap = false; 2839 size_t gap = 0x400000; 2840 2841 // Assert only that the size is a multiple of the page size, since 2842 // that's all that mmap requires, and since that's all we really know 2843 // about at this low abstraction level. If we need higher alignment, 2844 // we can either pass an alignment to this method or verify alignment 2845 // in one of the methods further up the call chain. See bug 5044738. 2846 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2847 2848 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2849 // Give it a try, if the kernel honors the hint we can return immediately. 2850 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2851 2852 volatile int err = errno; 2853 if (addr == requested_addr) { 2854 return addr; 2855 } else if (addr != NULL) { 2856 pd_unmap_memory(addr, bytes); 2857 } 2858 2859 if (PrintMiscellaneous && Verbose) { 2860 char buf[256]; 2861 buf[0] = '\0'; 2862 if (addr == NULL) { 2863 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2864 } 2865 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 2866 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2867 "%s", bytes, requested_addr, addr, buf); 2868 } 2869 2870 // Address hint method didn't work. Fall back to the old method. 2871 // In theory, once SNV becomes our oldest supported platform, this 2872 // code will no longer be needed. 2873 // 2874 // Repeatedly allocate blocks until the block is allocated at the 2875 // right spot. Give up after max_tries. 2876 int i; 2877 for (i = 0; i < max_tries; ++i) { 2878 base[i] = reserve_memory(bytes); 2879 2880 if (base[i] != NULL) { 2881 // Is this the block we wanted? 2882 if (base[i] == requested_addr) { 2883 size[i] = bytes; 2884 break; 2885 } 2886 2887 // check that the gap value is right 2888 if (had_top_overlap && !have_adjusted_gap) { 2889 size_t actual_gap = base[i-1] - base[i] - bytes; 2890 if (gap != actual_gap) { 2891 // adjust the gap value and retry the last 2 allocations 2892 assert(i > 0, "gap adjustment code problem"); 2893 have_adjusted_gap = true; // adjust the gap only once, just in case 2894 gap = actual_gap; 2895 if (PrintMiscellaneous && Verbose) { 2896 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2897 } 2898 unmap_memory(base[i], bytes); 2899 unmap_memory(base[i-1], size[i-1]); 2900 i-=2; 2901 continue; 2902 } 2903 } 2904 2905 // Does this overlap the block we wanted? Give back the overlapped 2906 // parts and try again. 2907 // 2908 // There is still a bug in this code: if top_overlap == bytes, 2909 // the overlap is offset from requested region by the value of gap. 2910 // In this case giving back the overlapped part will not work, 2911 // because we'll give back the entire block at base[i] and 2912 // therefore the subsequent allocation will not generate a new gap. 2913 // This could be fixed with a new algorithm that used larger 2914 // or variable size chunks to find the requested region - 2915 // but such a change would introduce additional complications. 2916 // It's rare enough that the planets align for this bug, 2917 // so we'll just wait for a fix for 6204603/5003415 which 2918 // will provide a mmap flag to allow us to avoid this business. 2919 2920 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2921 if (top_overlap >= 0 && top_overlap < bytes) { 2922 had_top_overlap = true; 2923 unmap_memory(base[i], top_overlap); 2924 base[i] += top_overlap; 2925 size[i] = bytes - top_overlap; 2926 } else { 2927 size_t bottom_overlap = base[i] + bytes - requested_addr; 2928 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2929 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2930 warning("attempt_reserve_memory_at: possible alignment bug"); 2931 } 2932 unmap_memory(requested_addr, bottom_overlap); 2933 size[i] = bytes - bottom_overlap; 2934 } else { 2935 size[i] = bytes; 2936 } 2937 } 2938 } 2939 } 2940 2941 // Give back the unused reserved pieces. 2942 2943 for (int j = 0; j < i; ++j) { 2944 if (base[j] != NULL) { 2945 unmap_memory(base[j], size[j]); 2946 } 2947 } 2948 2949 return (i < max_tries) ? requested_addr : NULL; 2950} 2951 2952bool os::pd_release_memory(char* addr, size_t bytes) { 2953 size_t size = bytes; 2954 return munmap(addr, size) == 0; 2955} 2956 2957static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2958 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2959 "addr must be page aligned"); 2960 int retVal = mprotect(addr, bytes, prot); 2961 return retVal == 0; 2962} 2963 2964// Protect memory (Used to pass readonly pages through 2965// JNI GetArray<type>Elements with empty arrays.) 2966// Also, used for serialization page and for compressed oops null pointer 2967// checking. 2968bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2969 bool is_committed) { 2970 unsigned int p = 0; 2971 switch (prot) { 2972 case MEM_PROT_NONE: p = PROT_NONE; break; 2973 case MEM_PROT_READ: p = PROT_READ; break; 2974 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2975 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2976 default: 2977 ShouldNotReachHere(); 2978 } 2979 // is_committed is unused. 2980 return solaris_mprotect(addr, bytes, p); 2981} 2982 2983// guard_memory and unguard_memory only happens within stack guard pages. 2984// Since ISM pertains only to the heap, guard and unguard memory should not 2985/// happen with an ISM region. 2986bool os::guard_memory(char* addr, size_t bytes) { 2987 return solaris_mprotect(addr, bytes, PROT_NONE); 2988} 2989 2990bool os::unguard_memory(char* addr, size_t bytes) { 2991 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 2992} 2993 2994// Large page support 2995static size_t _large_page_size = 0; 2996 2997// Insertion sort for small arrays (descending order). 2998static void insertion_sort_descending(size_t* array, int len) { 2999 for (int i = 0; i < len; i++) { 3000 size_t val = array[i]; 3001 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3002 size_t tmp = array[key]; 3003 array[key] = array[key - 1]; 3004 array[key - 1] = tmp; 3005 } 3006 } 3007} 3008 3009bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 3010 const unsigned int usable_count = VM_Version::page_size_count(); 3011 if (usable_count == 1) { 3012 return false; 3013 } 3014 3015 // Find the right getpagesizes interface. When solaris 11 is the minimum 3016 // build platform, getpagesizes() (without the '2') can be called directly. 3017 typedef int (*gps_t)(size_t[], int); 3018 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 3019 if (gps_func == NULL) { 3020 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 3021 if (gps_func == NULL) { 3022 if (warn) { 3023 warning("MPSS is not supported by the operating system."); 3024 } 3025 return false; 3026 } 3027 } 3028 3029 // Fill the array of page sizes. 3030 int n = (*gps_func)(_page_sizes, page_sizes_max); 3031 assert(n > 0, "Solaris bug?"); 3032 3033 if (n == page_sizes_max) { 3034 // Add a sentinel value (necessary only if the array was completely filled 3035 // since it is static (zeroed at initialization)). 3036 _page_sizes[--n] = 0; 3037 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3038 } 3039 assert(_page_sizes[n] == 0, "missing sentinel"); 3040 trace_page_sizes("available page sizes", _page_sizes, n); 3041 3042 if (n == 1) return false; // Only one page size available. 3043 3044 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3045 // select up to usable_count elements. First sort the array, find the first 3046 // acceptable value, then copy the usable sizes to the top of the array and 3047 // trim the rest. Make sure to include the default page size :-). 3048 // 3049 // A better policy could get rid of the 4M limit by taking the sizes of the 3050 // important VM memory regions (java heap and possibly the code cache) into 3051 // account. 3052 insertion_sort_descending(_page_sizes, n); 3053 const size_t size_limit = 3054 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3055 int beg; 3056 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */; 3057 const int end = MIN2((int)usable_count, n) - 1; 3058 for (int cur = 0; cur < end; ++cur, ++beg) { 3059 _page_sizes[cur] = _page_sizes[beg]; 3060 } 3061 _page_sizes[end] = vm_page_size(); 3062 _page_sizes[end + 1] = 0; 3063 3064 if (_page_sizes[end] > _page_sizes[end - 1]) { 3065 // Default page size is not the smallest; sort again. 3066 insertion_sort_descending(_page_sizes, end + 1); 3067 } 3068 *page_size = _page_sizes[0]; 3069 3070 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 3071 return true; 3072} 3073 3074void os::large_page_init() { 3075 if (UseLargePages) { 3076 // print a warning if any large page related flag is specified on command line 3077 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3078 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3079 3080 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3081 } 3082} 3083 3084bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 3085 // Signal to OS that we want large pages for addresses 3086 // from addr, addr + bytes 3087 struct memcntl_mha mpss_struct; 3088 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3089 mpss_struct.mha_pagesize = align; 3090 mpss_struct.mha_flags = 0; 3091 // Upon successful completion, memcntl() returns 0 3092 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 3093 debug_only(warning("Attempt to use MPSS failed.")); 3094 return false; 3095 } 3096 return true; 3097} 3098 3099char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 3100 fatal("os::reserve_memory_special should not be called on Solaris."); 3101 return NULL; 3102} 3103 3104bool os::release_memory_special(char* base, size_t bytes) { 3105 fatal("os::release_memory_special should not be called on Solaris."); 3106 return false; 3107} 3108 3109size_t os::large_page_size() { 3110 return _large_page_size; 3111} 3112 3113// MPSS allows application to commit large page memory on demand; with ISM 3114// the entire memory region must be allocated as shared memory. 3115bool os::can_commit_large_page_memory() { 3116 return true; 3117} 3118 3119bool os::can_execute_large_page_memory() { 3120 return true; 3121} 3122 3123// Read calls from inside the vm need to perform state transitions 3124size_t os::read(int fd, void *buf, unsigned int nBytes) { 3125 size_t res; 3126 JavaThread* thread = (JavaThread*)Thread::current(); 3127 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3128 ThreadBlockInVM tbiv(thread); 3129 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3130 return res; 3131} 3132 3133size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3134 size_t res; 3135 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 3136 "Assumed _thread_in_native"); 3137 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3138 return res; 3139} 3140 3141void os::naked_short_sleep(jlong ms) { 3142 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 3143 3144 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 3145 // Solaris requires -lrt for this. 3146 usleep((ms * 1000)); 3147 3148 return; 3149} 3150 3151// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3152void os::infinite_sleep() { 3153 while (true) { // sleep forever ... 3154 ::sleep(100); // ... 100 seconds at a time 3155 } 3156} 3157 3158// Used to convert frequent JVM_Yield() to nops 3159bool os::dont_yield() { 3160 if (DontYieldALot) { 3161 static hrtime_t last_time = 0; 3162 hrtime_t diff = getTimeNanos() - last_time; 3163 3164 if (diff < DontYieldALotInterval * 1000000) 3165 return true; 3166 3167 last_time += diff; 3168 3169 return false; 3170 } 3171 else { 3172 return false; 3173 } 3174} 3175 3176// Caveat: Solaris os::yield() causes a thread-state transition whereas 3177// the linux and win32 implementations do not. This should be checked. 3178 3179void os::yield() { 3180 // Yields to all threads with same or greater priority 3181 os::sleep(Thread::current(), 0, false); 3182} 3183 3184// Note that yield semantics are defined by the scheduling class to which 3185// the thread currently belongs. Typically, yield will _not yield to 3186// other equal or higher priority threads that reside on the dispatch queues 3187// of other CPUs. 3188 3189os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3190 3191// Interface for setting lwp priorities. If we are using T2 libthread, 3192// which forces the use of BoundThreads or we manually set UseBoundThreads, 3193// all of our threads will be assigned to real lwp's. Using the thr_setprio 3194// function is meaningless in this mode so we must adjust the real lwp's priority 3195// The routines below implement the getting and setting of lwp priorities. 3196// 3197// Note: T2 is now the only supported libthread. UseBoundThreads flag is 3198// being deprecated and all threads are now BoundThreads 3199// 3200// Note: There are three priority scales used on Solaris. Java priotities 3201// which range from 1 to 10, libthread "thr_setprio" scale which range 3202// from 0 to 127, and the current scheduling class of the process we 3203// are running in. This is typically from -60 to +60. 3204// The setting of the lwp priorities in done after a call to thr_setprio 3205// so Java priorities are mapped to libthread priorities and we map from 3206// the latter to lwp priorities. We don't keep priorities stored in 3207// Java priorities since some of our worker threads want to set priorities 3208// higher than all Java threads. 3209// 3210// For related information: 3211// (1) man -s 2 priocntl 3212// (2) man -s 4 priocntl 3213// (3) man dispadmin 3214// = librt.so 3215// = libthread/common/rtsched.c - thrp_setlwpprio(). 3216// = ps -cL <pid> ... to validate priority. 3217// = sched_get_priority_min and _max 3218// pthread_create 3219// sched_setparam 3220// pthread_setschedparam 3221// 3222// Assumptions: 3223// + We assume that all threads in the process belong to the same 3224// scheduling class. IE. an homogenous process. 3225// + Must be root or in IA group to change change "interactive" attribute. 3226// Priocntl() will fail silently. The only indication of failure is when 3227// we read-back the value and notice that it hasn't changed. 3228// + Interactive threads enter the runq at the head, non-interactive at the tail. 3229// + For RT, change timeslice as well. Invariant: 3230// constant "priority integral" 3231// Konst == TimeSlice * (60-Priority) 3232// Given a priority, compute appropriate timeslice. 3233// + Higher numerical values have higher priority. 3234 3235// sched class attributes 3236typedef struct { 3237 int schedPolicy; // classID 3238 int maxPrio; 3239 int minPrio; 3240} SchedInfo; 3241 3242 3243static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3244 3245#ifdef ASSERT 3246static int ReadBackValidate = 1; 3247#endif 3248static int myClass = 0; 3249static int myMin = 0; 3250static int myMax = 0; 3251static int myCur = 0; 3252static bool priocntl_enable = false; 3253 3254static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4 3255static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3256 3257 3258// lwp_priocntl_init 3259// 3260// Try to determine the priority scale for our process. 3261// 3262// Return errno or 0 if OK. 3263// 3264static int lwp_priocntl_init() { 3265 int rslt; 3266 pcinfo_t ClassInfo; 3267 pcparms_t ParmInfo; 3268 int i; 3269 3270 if (!UseThreadPriorities) return 0; 3271 3272 // If ThreadPriorityPolicy is 1, switch tables 3273 if (ThreadPriorityPolicy == 1) { 3274 for (i = 0; i < CriticalPriority+1; i++) 3275 os::java_to_os_priority[i] = prio_policy1[i]; 3276 } 3277 if (UseCriticalJavaThreadPriority) { 3278 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3279 // See set_native_priority() and set_lwp_class_and_priority(). 3280 // Save original MaxPriority mapping in case attempt to 3281 // use critical priority fails. 3282 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3283 // Set negative to distinguish from other priorities 3284 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3285 } 3286 3287 // Get IDs for a set of well-known scheduling classes. 3288 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3289 // the system. We should have a loop that iterates over the 3290 // classID values, which are known to be "small" integers. 3291 3292 strcpy(ClassInfo.pc_clname, "TS"); 3293 ClassInfo.pc_cid = -1; 3294 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3295 if (rslt < 0) return errno; 3296 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3297 tsLimits.schedPolicy = ClassInfo.pc_cid; 3298 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3299 tsLimits.minPrio = -tsLimits.maxPrio; 3300 3301 strcpy(ClassInfo.pc_clname, "IA"); 3302 ClassInfo.pc_cid = -1; 3303 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3304 if (rslt < 0) return errno; 3305 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3306 iaLimits.schedPolicy = ClassInfo.pc_cid; 3307 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3308 iaLimits.minPrio = -iaLimits.maxPrio; 3309 3310 strcpy(ClassInfo.pc_clname, "RT"); 3311 ClassInfo.pc_cid = -1; 3312 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3313 if (rslt < 0) return errno; 3314 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3315 rtLimits.schedPolicy = ClassInfo.pc_cid; 3316 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3317 rtLimits.minPrio = 0; 3318 3319 strcpy(ClassInfo.pc_clname, "FX"); 3320 ClassInfo.pc_cid = -1; 3321 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3322 if (rslt < 0) return errno; 3323 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3324 fxLimits.schedPolicy = ClassInfo.pc_cid; 3325 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3326 fxLimits.minPrio = 0; 3327 3328 // Query our "current" scheduling class. 3329 // This will normally be IA, TS or, rarely, FX or RT. 3330 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3331 ParmInfo.pc_cid = PC_CLNULL; 3332 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3333 if (rslt < 0) return errno; 3334 myClass = ParmInfo.pc_cid; 3335 3336 // We now know our scheduling classId, get specific information 3337 // about the class. 3338 ClassInfo.pc_cid = myClass; 3339 ClassInfo.pc_clname[0] = 0; 3340 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3341 if (rslt < 0) return errno; 3342 3343 if (ThreadPriorityVerbose) { 3344 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3345 } 3346 3347 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3348 ParmInfo.pc_cid = PC_CLNULL; 3349 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3350 if (rslt < 0) return errno; 3351 3352 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3353 myMin = rtLimits.minPrio; 3354 myMax = rtLimits.maxPrio; 3355 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3356 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3357 myMin = iaLimits.minPrio; 3358 myMax = iaLimits.maxPrio; 3359 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3360 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3361 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3362 myMin = tsLimits.minPrio; 3363 myMax = tsLimits.maxPrio; 3364 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3365 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3366 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3367 myMin = fxLimits.minPrio; 3368 myMax = fxLimits.maxPrio; 3369 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3370 } else { 3371 // No clue - punt 3372 if (ThreadPriorityVerbose) 3373 tty->print_cr("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3374 return EINVAL; // no clue, punt 3375 } 3376 3377 if (ThreadPriorityVerbose) { 3378 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax); 3379 } 3380 3381 priocntl_enable = true; // Enable changing priorities 3382 return 0; 3383} 3384 3385#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3386#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3387#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3388#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3389 3390 3391// scale_to_lwp_priority 3392// 3393// Convert from the libthread "thr_setprio" scale to our current 3394// lwp scheduling class scale. 3395// 3396static 3397int scale_to_lwp_priority (int rMin, int rMax, int x) 3398{ 3399 int v; 3400 3401 if (x == 127) return rMax; // avoid round-down 3402 v = (((x*(rMax-rMin)))/128)+rMin; 3403 return v; 3404} 3405 3406 3407// set_lwp_class_and_priority 3408int set_lwp_class_and_priority(int ThreadID, int lwpid, 3409 int newPrio, int new_class, bool scale) { 3410 int rslt; 3411 int Actual, Expected, prv; 3412 pcparms_t ParmInfo; // for GET-SET 3413#ifdef ASSERT 3414 pcparms_t ReadBack; // for readback 3415#endif 3416 3417 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3418 // Query current values. 3419 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3420 // Cache "pcparms_t" in global ParmCache. 3421 // TODO: elide set-to-same-value 3422 3423 // If something went wrong on init, don't change priorities. 3424 if (!priocntl_enable) { 3425 if (ThreadPriorityVerbose) 3426 tty->print_cr("Trying to set priority but init failed, ignoring"); 3427 return EINVAL; 3428 } 3429 3430 // If lwp hasn't started yet, just return 3431 // the _start routine will call us again. 3432 if (lwpid <= 0) { 3433 if (ThreadPriorityVerbose) { 3434 tty->print_cr("deferring the set_lwp_class_and_priority of thread " 3435 INTPTR_FORMAT " to %d, lwpid not set", 3436 ThreadID, newPrio); 3437 } 3438 return 0; 3439 } 3440 3441 if (ThreadPriorityVerbose) { 3442 tty->print_cr ("set_lwp_class_and_priority(" 3443 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3444 ThreadID, lwpid, newPrio); 3445 } 3446 3447 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3448 ParmInfo.pc_cid = PC_CLNULL; 3449 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3450 if (rslt < 0) return errno; 3451 3452 int cur_class = ParmInfo.pc_cid; 3453 ParmInfo.pc_cid = (id_t)new_class; 3454 3455 if (new_class == rtLimits.schedPolicy) { 3456 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3457 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3458 rtLimits.maxPrio, newPrio) 3459 : newPrio; 3460 rtInfo->rt_tqsecs = RT_NOCHANGE; 3461 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3462 if (ThreadPriorityVerbose) { 3463 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3464 } 3465 } else if (new_class == iaLimits.schedPolicy) { 3466 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3467 int maxClamped = MIN2(iaLimits.maxPrio, 3468 cur_class == new_class 3469 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3470 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3471 maxClamped, newPrio) 3472 : newPrio; 3473 iaInfo->ia_uprilim = cur_class == new_class 3474 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3475 iaInfo->ia_mode = IA_NOCHANGE; 3476 if (ThreadPriorityVerbose) { 3477 tty->print_cr("IA: [%d...%d] %d->%d\n", 3478 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3479 } 3480 } else if (new_class == tsLimits.schedPolicy) { 3481 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3482 int maxClamped = MIN2(tsLimits.maxPrio, 3483 cur_class == new_class 3484 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3485 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3486 maxClamped, newPrio) 3487 : newPrio; 3488 tsInfo->ts_uprilim = cur_class == new_class 3489 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3490 if (ThreadPriorityVerbose) { 3491 tty->print_cr("TS: [%d...%d] %d->%d\n", 3492 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3493 } 3494 } else if (new_class == fxLimits.schedPolicy) { 3495 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3496 int maxClamped = MIN2(fxLimits.maxPrio, 3497 cur_class == new_class 3498 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3499 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3500 maxClamped, newPrio) 3501 : newPrio; 3502 fxInfo->fx_uprilim = cur_class == new_class 3503 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3504 fxInfo->fx_tqsecs = FX_NOCHANGE; 3505 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3506 if (ThreadPriorityVerbose) { 3507 tty->print_cr("FX: [%d...%d] %d->%d\n", 3508 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3509 } 3510 } else { 3511 if (ThreadPriorityVerbose) { 3512 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3513 } 3514 return EINVAL; // no clue, punt 3515 } 3516 3517 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3518 if (ThreadPriorityVerbose && rslt) { 3519 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3520 } 3521 if (rslt < 0) return errno; 3522 3523#ifdef ASSERT 3524 // Sanity check: read back what we just attempted to set. 3525 // In theory it could have changed in the interim ... 3526 // 3527 // The priocntl system call is tricky. 3528 // Sometimes it'll validate the priority value argument and 3529 // return EINVAL if unhappy. At other times it fails silently. 3530 // Readbacks are prudent. 3531 3532 if (!ReadBackValidate) return 0; 3533 3534 memset(&ReadBack, 0, sizeof(pcparms_t)); 3535 ReadBack.pc_cid = PC_CLNULL; 3536 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3537 assert(rslt >= 0, "priocntl failed"); 3538 Actual = Expected = 0xBAD; 3539 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3540 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3541 Actual = RTPRI(ReadBack)->rt_pri; 3542 Expected = RTPRI(ParmInfo)->rt_pri; 3543 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3544 Actual = IAPRI(ReadBack)->ia_upri; 3545 Expected = IAPRI(ParmInfo)->ia_upri; 3546 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3547 Actual = TSPRI(ReadBack)->ts_upri; 3548 Expected = TSPRI(ParmInfo)->ts_upri; 3549 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3550 Actual = FXPRI(ReadBack)->fx_upri; 3551 Expected = FXPRI(ParmInfo)->fx_upri; 3552 } else { 3553 if (ThreadPriorityVerbose) { 3554 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 3555 ParmInfo.pc_cid); 3556 } 3557 } 3558 3559 if (Actual != Expected) { 3560 if (ThreadPriorityVerbose) { 3561 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3562 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3563 } 3564 } 3565#endif 3566 3567 return 0; 3568} 3569 3570// Solaris only gives access to 128 real priorities at a time, 3571// so we expand Java's ten to fill this range. This would be better 3572// if we dynamically adjusted relative priorities. 3573// 3574// The ThreadPriorityPolicy option allows us to select 2 different 3575// priority scales. 3576// 3577// ThreadPriorityPolicy=0 3578// Since the Solaris' default priority is MaximumPriority, we do not 3579// set a priority lower than Max unless a priority lower than 3580// NormPriority is requested. 3581// 3582// ThreadPriorityPolicy=1 3583// This mode causes the priority table to get filled with 3584// linear values. NormPriority get's mapped to 50% of the 3585// Maximum priority an so on. This will cause VM threads 3586// to get unfair treatment against other Solaris processes 3587// which do not explicitly alter their thread priorities. 3588// 3589 3590int os::java_to_os_priority[CriticalPriority + 1] = { 3591 -99999, // 0 Entry should never be used 3592 3593 0, // 1 MinPriority 3594 32, // 2 3595 64, // 3 3596 3597 96, // 4 3598 127, // 5 NormPriority 3599 127, // 6 3600 3601 127, // 7 3602 127, // 8 3603 127, // 9 NearMaxPriority 3604 3605 127, // 10 MaxPriority 3606 3607 -criticalPrio // 11 CriticalPriority 3608}; 3609 3610OSReturn os::set_native_priority(Thread* thread, int newpri) { 3611 OSThread* osthread = thread->osthread(); 3612 3613 // Save requested priority in case the thread hasn't been started 3614 osthread->set_native_priority(newpri); 3615 3616 // Check for critical priority request 3617 bool fxcritical = false; 3618 if (newpri == -criticalPrio) { 3619 fxcritical = true; 3620 newpri = criticalPrio; 3621 } 3622 3623 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3624 if (!UseThreadPriorities) return OS_OK; 3625 3626 int status = 0; 3627 3628 if (!fxcritical) { 3629 // Use thr_setprio only if we have a priority that thr_setprio understands 3630 status = thr_setprio(thread->osthread()->thread_id(), newpri); 3631 } 3632 3633 int lwp_status = 3634 set_lwp_class_and_priority(osthread->thread_id(), 3635 osthread->lwp_id(), 3636 newpri, 3637 fxcritical ? fxLimits.schedPolicy : myClass, 3638 !fxcritical); 3639 if (lwp_status != 0 && fxcritical) { 3640 // Try again, this time without changing the scheduling class 3641 newpri = java_MaxPriority_to_os_priority; 3642 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 3643 osthread->lwp_id(), 3644 newpri, myClass, false); 3645 } 3646 status |= lwp_status; 3647 return (status == 0) ? OS_OK : OS_ERR; 3648} 3649 3650 3651OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 3652 int p; 3653 if (!UseThreadPriorities) { 3654 *priority_ptr = NormalPriority; 3655 return OS_OK; 3656 } 3657 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3658 if (status != 0) { 3659 return OS_ERR; 3660 } 3661 *priority_ptr = p; 3662 return OS_OK; 3663} 3664 3665 3666// Hint to the underlying OS that a task switch would not be good. 3667// Void return because it's a hint and can fail. 3668void os::hint_no_preempt() { 3669 schedctl_start(schedctl_init()); 3670} 3671 3672static void resume_clear_context(OSThread *osthread) { 3673 osthread->set_ucontext(NULL); 3674} 3675 3676static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 3677 osthread->set_ucontext(context); 3678} 3679 3680static Semaphore sr_semaphore; 3681 3682void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) { 3683 // Save and restore errno to avoid confusing native code with EINTR 3684 // after sigsuspend. 3685 int old_errno = errno; 3686 3687 OSThread* osthread = thread->osthread(); 3688 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 3689 3690 os::SuspendResume::State current = osthread->sr.state(); 3691 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 3692 suspend_save_context(osthread, uc); 3693 3694 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 3695 os::SuspendResume::State state = osthread->sr.suspended(); 3696 if (state == os::SuspendResume::SR_SUSPENDED) { 3697 sigset_t suspend_set; // signals for sigsuspend() 3698 3699 // get current set of blocked signals and unblock resume signal 3700 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set); 3701 sigdelset(&suspend_set, os::Solaris::SIGasync()); 3702 3703 sr_semaphore.signal(); 3704 // wait here until we are resumed 3705 while (1) { 3706 sigsuspend(&suspend_set); 3707 3708 os::SuspendResume::State result = osthread->sr.running(); 3709 if (result == os::SuspendResume::SR_RUNNING) { 3710 sr_semaphore.signal(); 3711 break; 3712 } 3713 } 3714 3715 } else if (state == os::SuspendResume::SR_RUNNING) { 3716 // request was cancelled, continue 3717 } else { 3718 ShouldNotReachHere(); 3719 } 3720 3721 resume_clear_context(osthread); 3722 } else if (current == os::SuspendResume::SR_RUNNING) { 3723 // request was cancelled, continue 3724 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 3725 // ignore 3726 } else { 3727 // ignore 3728 } 3729 3730 errno = old_errno; 3731} 3732 3733void os::print_statistics() { 3734} 3735 3736int os::message_box(const char* title, const char* message) { 3737 int i; 3738 fdStream err(defaultStream::error_fd()); 3739 for (i = 0; i < 78; i++) err.print_raw("="); 3740 err.cr(); 3741 err.print_raw_cr(title); 3742 for (i = 0; i < 78; i++) err.print_raw("-"); 3743 err.cr(); 3744 err.print_raw_cr(message); 3745 for (i = 0; i < 78; i++) err.print_raw("="); 3746 err.cr(); 3747 3748 char buf[16]; 3749 // Prevent process from exiting upon "read error" without consuming all CPU 3750 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3751 3752 return buf[0] == 'y' || buf[0] == 'Y'; 3753} 3754 3755static int sr_notify(OSThread* osthread) { 3756 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync()); 3757 assert_status(status == 0, status, "thr_kill"); 3758 return status; 3759} 3760 3761// "Randomly" selected value for how long we want to spin 3762// before bailing out on suspending a thread, also how often 3763// we send a signal to a thread we want to resume 3764static const int RANDOMLY_LARGE_INTEGER = 1000000; 3765static const int RANDOMLY_LARGE_INTEGER2 = 100; 3766 3767static bool do_suspend(OSThread* osthread) { 3768 assert(osthread->sr.is_running(), "thread should be running"); 3769 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 3770 3771 // mark as suspended and send signal 3772 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 3773 // failed to switch, state wasn't running? 3774 ShouldNotReachHere(); 3775 return false; 3776 } 3777 3778 if (sr_notify(osthread) != 0) { 3779 ShouldNotReachHere(); 3780 } 3781 3782 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 3783 while (true) { 3784 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) { 3785 break; 3786 } else { 3787 // timeout 3788 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 3789 if (cancelled == os::SuspendResume::SR_RUNNING) { 3790 return false; 3791 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 3792 // make sure that we consume the signal on the semaphore as well 3793 sr_semaphore.wait(); 3794 break; 3795 } else { 3796 ShouldNotReachHere(); 3797 return false; 3798 } 3799 } 3800 } 3801 3802 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 3803 return true; 3804} 3805 3806static void do_resume(OSThread* osthread) { 3807 assert(osthread->sr.is_suspended(), "thread should be suspended"); 3808 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 3809 3810 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 3811 // failed to switch to WAKEUP_REQUEST 3812 ShouldNotReachHere(); 3813 return; 3814 } 3815 3816 while (true) { 3817 if (sr_notify(osthread) == 0) { 3818 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { 3819 if (osthread->sr.is_running()) { 3820 return; 3821 } 3822 } 3823 } else { 3824 ShouldNotReachHere(); 3825 } 3826 } 3827 3828 guarantee(osthread->sr.is_running(), "Must be running!"); 3829} 3830 3831void os::SuspendedThreadTask::internal_do_task() { 3832 if (do_suspend(_thread->osthread())) { 3833 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 3834 do_task(context); 3835 do_resume(_thread->osthread()); 3836 } 3837} 3838 3839class PcFetcher : public os::SuspendedThreadTask { 3840public: 3841 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} 3842 ExtendedPC result(); 3843protected: 3844 void do_task(const os::SuspendedThreadTaskContext& context); 3845private: 3846 ExtendedPC _epc; 3847}; 3848 3849ExtendedPC PcFetcher::result() { 3850 guarantee(is_done(), "task is not done yet."); 3851 return _epc; 3852} 3853 3854void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { 3855 Thread* thread = context.thread(); 3856 OSThread* osthread = thread->osthread(); 3857 if (osthread->ucontext() != NULL) { 3858 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext()); 3859 } else { 3860 // NULL context is unexpected, double-check this is the VMThread 3861 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); 3862 } 3863} 3864 3865// A lightweight implementation that does not suspend the target thread and 3866// thus returns only a hint. Used for profiling only! 3867ExtendedPC os::get_thread_pc(Thread* thread) { 3868 // Make sure that it is called by the watcher and the Threads lock is owned. 3869 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3870 // For now, is only used to profile the VM Thread 3871 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3872 PcFetcher fetcher(thread); 3873 fetcher.run(); 3874 return fetcher.result(); 3875} 3876 3877 3878// This does not do anything on Solaris. This is basically a hook for being 3879// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3880void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 3881 f(value, method, args, thread); 3882} 3883 3884// This routine may be used by user applications as a "hook" to catch signals. 3885// The user-defined signal handler must pass unrecognized signals to this 3886// routine, and if it returns true (non-zero), then the signal handler must 3887// return immediately. If the flag "abort_if_unrecognized" is true, then this 3888// routine will never retun false (zero), but instead will execute a VM panic 3889// routine kill the process. 3890// 3891// If this routine returns false, it is OK to call it again. This allows 3892// the user-defined signal handler to perform checks either before or after 3893// the VM performs its own checks. Naturally, the user code would be making 3894// a serious error if it tried to handle an exception (such as a null check 3895// or breakpoint) that the VM was generating for its own correct operation. 3896// 3897// This routine may recognize any of the following kinds of signals: 3898// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3899// os::Solaris::SIGasync 3900// It should be consulted by handlers for any of those signals. 3901// It explicitly does not recognize os::Solaris::SIGinterrupt 3902// 3903// The caller of this routine must pass in the three arguments supplied 3904// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3905// field of the structure passed to sigaction(). This routine assumes that 3906// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3907// 3908// Note that the VM will print warnings if it detects conflicting signal 3909// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3910// 3911extern "C" JNIEXPORT int 3912JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, 3913 int abort_if_unrecognized); 3914 3915 3916void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3917 int orig_errno = errno; // Preserve errno value over signal handler. 3918 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3919 errno = orig_errno; 3920} 3921 3922/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 3923 is needed to provoke threads blocked on IO to return an EINTR 3924 Note: this explicitly does NOT call JVM_handle_solaris_signal and 3925 does NOT participate in signal chaining due to requirement for 3926 NOT setting SA_RESTART to make EINTR work. */ 3927extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 3928 if (UseSignalChaining) { 3929 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 3930 if (actp && actp->sa_handler) { 3931 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 3932 } 3933 } 3934} 3935 3936// This boolean allows users to forward their own non-matching signals 3937// to JVM_handle_solaris_signal, harmlessly. 3938bool os::Solaris::signal_handlers_are_installed = false; 3939 3940// For signal-chaining 3941bool os::Solaris::libjsig_is_loaded = false; 3942typedef struct sigaction *(*get_signal_t)(int); 3943get_signal_t os::Solaris::get_signal_action = NULL; 3944 3945struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3946 struct sigaction *actp = NULL; 3947 3948 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 3949 // Retrieve the old signal handler from libjsig 3950 actp = (*get_signal_action)(sig); 3951 } 3952 if (actp == NULL) { 3953 // Retrieve the preinstalled signal handler from jvm 3954 actp = get_preinstalled_handler(sig); 3955 } 3956 3957 return actp; 3958} 3959 3960static bool call_chained_handler(struct sigaction *actp, int sig, 3961 siginfo_t *siginfo, void *context) { 3962 // Call the old signal handler 3963 if (actp->sa_handler == SIG_DFL) { 3964 // It's more reasonable to let jvm treat it as an unexpected exception 3965 // instead of taking the default action. 3966 return false; 3967 } else if (actp->sa_handler != SIG_IGN) { 3968 if ((actp->sa_flags & SA_NODEFER) == 0) { 3969 // automaticlly block the signal 3970 sigaddset(&(actp->sa_mask), sig); 3971 } 3972 3973 sa_handler_t hand; 3974 sa_sigaction_t sa; 3975 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 3976 // retrieve the chained handler 3977 if (siginfo_flag_set) { 3978 sa = actp->sa_sigaction; 3979 } else { 3980 hand = actp->sa_handler; 3981 } 3982 3983 if ((actp->sa_flags & SA_RESETHAND) != 0) { 3984 actp->sa_handler = SIG_DFL; 3985 } 3986 3987 // try to honor the signal mask 3988 sigset_t oset; 3989 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 3990 3991 // call into the chained handler 3992 if (siginfo_flag_set) { 3993 (*sa)(sig, siginfo, context); 3994 } else { 3995 (*hand)(sig); 3996 } 3997 3998 // restore the signal mask 3999 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4000 } 4001 // Tell jvm's signal handler the signal is taken care of. 4002 return true; 4003} 4004 4005bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4006 bool chained = false; 4007 // signal-chaining 4008 if (UseSignalChaining) { 4009 struct sigaction *actp = get_chained_signal_action(sig); 4010 if (actp != NULL) { 4011 chained = call_chained_handler(actp, sig, siginfo, context); 4012 } 4013 } 4014 return chained; 4015} 4016 4017struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4018 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4019 if (preinstalled_sigs[sig] != 0) { 4020 return &chainedsigactions[sig]; 4021 } 4022 return NULL; 4023} 4024 4025void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4026 4027 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4028 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4029 chainedsigactions[sig] = oldAct; 4030 preinstalled_sigs[sig] = 1; 4031} 4032 4033void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4034 // Check for overwrite. 4035 struct sigaction oldAct; 4036 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4037 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4038 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4039 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4040 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4041 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4042 if (AllowUserSignalHandlers || !set_installed) { 4043 // Do not overwrite; user takes responsibility to forward to us. 4044 return; 4045 } else if (UseSignalChaining) { 4046 if (oktochain) { 4047 // save the old handler in jvm 4048 save_preinstalled_handler(sig, oldAct); 4049 } else { 4050 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4051 } 4052 // libjsig also interposes the sigaction() call below and saves the 4053 // old sigaction on it own. 4054 } else { 4055 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4056 "%#lx for signal %d.", (long)oldhand, sig)); 4057 } 4058 } 4059 4060 struct sigaction sigAct; 4061 sigfillset(&(sigAct.sa_mask)); 4062 sigAct.sa_handler = SIG_DFL; 4063 4064 sigAct.sa_sigaction = signalHandler; 4065 // Handle SIGSEGV on alternate signal stack if 4066 // not using stack banging 4067 if (!UseStackBanging && sig == SIGSEGV) { 4068 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4069 // Interruptible i/o requires SA_RESTART cleared so EINTR 4070 // is returned instead of restarting system calls 4071 } else if (sig == os::Solaris::SIGinterrupt()) { 4072 sigemptyset(&sigAct.sa_mask); 4073 sigAct.sa_handler = NULL; 4074 sigAct.sa_flags = SA_SIGINFO; 4075 sigAct.sa_sigaction = sigINTRHandler; 4076 } else { 4077 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4078 } 4079 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4080 4081 sigaction(sig, &sigAct, &oldAct); 4082 4083 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4084 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4085 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4086} 4087 4088 4089#define DO_SIGNAL_CHECK(sig) \ 4090 if (!sigismember(&check_signal_done, sig)) \ 4091 os::Solaris::check_signal_handler(sig) 4092 4093// This method is a periodic task to check for misbehaving JNI applications 4094// under CheckJNI, we can add any periodic checks here 4095 4096void os::run_periodic_checks() { 4097 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4098 // thereby preventing a NULL checks. 4099 if (!check_addr0_done) check_addr0_done = check_addr0(tty); 4100 4101 if (check_signals == false) return; 4102 4103 // SEGV and BUS if overridden could potentially prevent 4104 // generation of hs*.log in the event of a crash, debugging 4105 // such a case can be very challenging, so we absolutely 4106 // check for the following for a good measure: 4107 DO_SIGNAL_CHECK(SIGSEGV); 4108 DO_SIGNAL_CHECK(SIGILL); 4109 DO_SIGNAL_CHECK(SIGFPE); 4110 DO_SIGNAL_CHECK(SIGBUS); 4111 DO_SIGNAL_CHECK(SIGPIPE); 4112 DO_SIGNAL_CHECK(SIGXFSZ); 4113 4114 // ReduceSignalUsage allows the user to override these handlers 4115 // see comments at the very top and jvm_solaris.h 4116 if (!ReduceSignalUsage) { 4117 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4118 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4119 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4120 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4121 } 4122 4123 // See comments above for using JVM1/JVM2 and UseAltSigs 4124 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4125 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4126 4127} 4128 4129typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4130 4131static os_sigaction_t os_sigaction = NULL; 4132 4133void os::Solaris::check_signal_handler(int sig) { 4134 char buf[O_BUFLEN]; 4135 address jvmHandler = NULL; 4136 4137 struct sigaction act; 4138 if (os_sigaction == NULL) { 4139 // only trust the default sigaction, in case it has been interposed 4140 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4141 if (os_sigaction == NULL) return; 4142 } 4143 4144 os_sigaction(sig, (struct sigaction*)NULL, &act); 4145 4146 address thisHandler = (act.sa_flags & SA_SIGINFO) 4147 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4148 : CAST_FROM_FN_PTR(address, act.sa_handler); 4149 4150 4151 switch (sig) { 4152 case SIGSEGV: 4153 case SIGBUS: 4154 case SIGFPE: 4155 case SIGPIPE: 4156 case SIGXFSZ: 4157 case SIGILL: 4158 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4159 break; 4160 4161 case SHUTDOWN1_SIGNAL: 4162 case SHUTDOWN2_SIGNAL: 4163 case SHUTDOWN3_SIGNAL: 4164 case BREAK_SIGNAL: 4165 jvmHandler = (address)user_handler(); 4166 break; 4167 4168 default: 4169 int intrsig = os::Solaris::SIGinterrupt(); 4170 int asynsig = os::Solaris::SIGasync(); 4171 4172 if (sig == intrsig) { 4173 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4174 } else if (sig == asynsig) { 4175 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4176 } else { 4177 return; 4178 } 4179 break; 4180 } 4181 4182 4183 if (thisHandler != jvmHandler) { 4184 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4185 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4186 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4187 // No need to check this sig any longer 4188 sigaddset(&check_signal_done, sig); 4189 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN 4190 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { 4191 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", 4192 exception_name(sig, buf, O_BUFLEN)); 4193 } 4194 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4195 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4196 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4197 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4198 // No need to check this sig any longer 4199 sigaddset(&check_signal_done, sig); 4200 } 4201 4202 // Print all the signal handler state 4203 if (sigismember(&check_signal_done, sig)) { 4204 print_signal_handlers(tty, buf, O_BUFLEN); 4205 } 4206 4207} 4208 4209void os::Solaris::install_signal_handlers() { 4210 bool libjsigdone = false; 4211 signal_handlers_are_installed = true; 4212 4213 // signal-chaining 4214 typedef void (*signal_setting_t)(); 4215 signal_setting_t begin_signal_setting = NULL; 4216 signal_setting_t end_signal_setting = NULL; 4217 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4218 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4219 if (begin_signal_setting != NULL) { 4220 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4221 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4222 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4223 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4224 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4225 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4226 libjsig_is_loaded = true; 4227 if (os::Solaris::get_libjsig_version != NULL) { 4228 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4229 } 4230 assert(UseSignalChaining, "should enable signal-chaining"); 4231 } 4232 if (libjsig_is_loaded) { 4233 // Tell libjsig jvm is setting signal handlers 4234 (*begin_signal_setting)(); 4235 } 4236 4237 set_signal_handler(SIGSEGV, true, true); 4238 set_signal_handler(SIGPIPE, true, true); 4239 set_signal_handler(SIGXFSZ, true, true); 4240 set_signal_handler(SIGBUS, true, true); 4241 set_signal_handler(SIGILL, true, true); 4242 set_signal_handler(SIGFPE, true, true); 4243 4244 4245 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4246 4247 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4248 // can not register overridable signals which might be > 32 4249 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4250 // Tell libjsig jvm has finished setting signal handlers 4251 (*end_signal_setting)(); 4252 libjsigdone = true; 4253 } 4254 } 4255 4256 // Never ok to chain our SIGinterrupt 4257 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4258 set_signal_handler(os::Solaris::SIGasync(), true, true); 4259 4260 if (libjsig_is_loaded && !libjsigdone) { 4261 // Tell libjsig jvm finishes setting signal handlers 4262 (*end_signal_setting)(); 4263 } 4264 4265 // We don't activate signal checker if libjsig is in place, we trust ourselves 4266 // and if UserSignalHandler is installed all bets are off. 4267 // Log that signal checking is off only if -verbose:jni is specified. 4268 if (CheckJNICalls) { 4269 if (libjsig_is_loaded) { 4270 if (PrintJNIResolving) { 4271 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4272 } 4273 check_signals = false; 4274 } 4275 if (AllowUserSignalHandlers) { 4276 if (PrintJNIResolving) { 4277 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4278 } 4279 check_signals = false; 4280 } 4281 } 4282} 4283 4284 4285void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4286 4287const char * signames[] = { 4288 "SIG0", 4289 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4290 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4291 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4292 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4293 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4294 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4295 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4296 "SIGCANCEL", "SIGLOST" 4297}; 4298 4299const char* os::exception_name(int exception_code, char* buf, size_t size) { 4300 if (0 < exception_code && exception_code <= SIGRTMAX) { 4301 // signal 4302 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4303 jio_snprintf(buf, size, "%s", signames[exception_code]); 4304 } else { 4305 jio_snprintf(buf, size, "SIG%d", exception_code); 4306 } 4307 return buf; 4308 } else { 4309 return NULL; 4310 } 4311} 4312 4313// (Static) wrapper for getisax(2) call. 4314os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4315 4316// (Static) wrappers for the liblgrp API 4317os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4318os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4319os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4320os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4321os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4322os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4323os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4324os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4325os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4326 4327// (Static) wrapper for meminfo() call. 4328os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4329 4330static address resolve_symbol_lazy(const char* name) { 4331 address addr = (address) dlsym(RTLD_DEFAULT, name); 4332 if (addr == NULL) { 4333 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4334 addr = (address) dlsym(RTLD_NEXT, name); 4335 } 4336 return addr; 4337} 4338 4339static address resolve_symbol(const char* name) { 4340 address addr = resolve_symbol_lazy(name); 4341 if (addr == NULL) { 4342 fatal(dlerror()); 4343 } 4344 return addr; 4345} 4346 4347void os::Solaris::libthread_init() { 4348 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4349 4350 lwp_priocntl_init(); 4351 4352 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4353 if (func == NULL) { 4354 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4355 // Guarantee that this VM is running on an new enough OS (5.6 or 4356 // later) that it will have a new enough libthread.so. 4357 guarantee(func != NULL, "libthread.so is too old."); 4358 } 4359 4360 int size; 4361 void (*handler_info_func)(address *, int *); 4362 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4363 handler_info_func(&handler_start, &size); 4364 handler_end = handler_start + size; 4365} 4366 4367 4368int_fnP_mutex_tP os::Solaris::_mutex_lock; 4369int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4370int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4371int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4372int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4373int os::Solaris::_mutex_scope = USYNC_THREAD; 4374 4375int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4376int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4377int_fnP_cond_tP os::Solaris::_cond_signal; 4378int_fnP_cond_tP os::Solaris::_cond_broadcast; 4379int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4380int_fnP_cond_tP os::Solaris::_cond_destroy; 4381int os::Solaris::_cond_scope = USYNC_THREAD; 4382 4383void os::Solaris::synchronization_init() { 4384 if (UseLWPSynchronization) { 4385 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4386 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4387 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4388 os::Solaris::set_mutex_init(lwp_mutex_init); 4389 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4390 os::Solaris::set_mutex_scope(USYNC_THREAD); 4391 4392 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4393 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4394 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4395 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4396 os::Solaris::set_cond_init(lwp_cond_init); 4397 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4398 os::Solaris::set_cond_scope(USYNC_THREAD); 4399 } 4400 else { 4401 os::Solaris::set_mutex_scope(USYNC_THREAD); 4402 os::Solaris::set_cond_scope(USYNC_THREAD); 4403 4404 if (UsePthreads) { 4405 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4406 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4407 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4408 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4409 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4410 4411 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4412 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4413 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4414 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4415 os::Solaris::set_cond_init(pthread_cond_default_init); 4416 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4417 } 4418 else { 4419 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4420 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4421 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4422 os::Solaris::set_mutex_init(::mutex_init); 4423 os::Solaris::set_mutex_destroy(::mutex_destroy); 4424 4425 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4426 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4427 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4428 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4429 os::Solaris::set_cond_init(::cond_init); 4430 os::Solaris::set_cond_destroy(::cond_destroy); 4431 } 4432 } 4433} 4434 4435bool os::Solaris::liblgrp_init() { 4436 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4437 if (handle != NULL) { 4438 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4439 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4440 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4441 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4442 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4443 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4444 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4445 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4446 dlsym(handle, "lgrp_cookie_stale"))); 4447 4448 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4449 set_lgrp_cookie(c); 4450 return true; 4451 } 4452 return false; 4453} 4454 4455void os::Solaris::misc_sym_init() { 4456 address func; 4457 4458 // getisax 4459 func = resolve_symbol_lazy("getisax"); 4460 if (func != NULL) { 4461 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4462 } 4463 4464 // meminfo 4465 func = resolve_symbol_lazy("meminfo"); 4466 if (func != NULL) { 4467 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4468 } 4469} 4470 4471uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4472 assert(_getisax != NULL, "_getisax not set"); 4473 return _getisax(array, n); 4474} 4475 4476// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4477typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4478static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4479 4480void init_pset_getloadavg_ptr(void) { 4481 pset_getloadavg_ptr = 4482 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4483 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4484 warning("pset_getloadavg function not found"); 4485 } 4486} 4487 4488int os::Solaris::_dev_zero_fd = -1; 4489 4490// this is called _before_ the global arguments have been parsed 4491void os::init(void) { 4492 _initial_pid = getpid(); 4493 4494 max_hrtime = first_hrtime = gethrtime(); 4495 4496 init_random(1234567); 4497 4498 page_size = sysconf(_SC_PAGESIZE); 4499 if (page_size == -1) 4500 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 4501 strerror(errno))); 4502 init_page_sizes((size_t) page_size); 4503 4504 Solaris::initialize_system_info(); 4505 4506 // Initialize misc. symbols as soon as possible, so we can use them 4507 // if we need them. 4508 Solaris::misc_sym_init(); 4509 4510 int fd = ::open("/dev/zero", O_RDWR); 4511 if (fd < 0) { 4512 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 4513 } else { 4514 Solaris::set_dev_zero_fd(fd); 4515 4516 // Close on exec, child won't inherit. 4517 fcntl(fd, F_SETFD, FD_CLOEXEC); 4518 } 4519 4520 clock_tics_per_sec = CLK_TCK; 4521 4522 // check if dladdr1() exists; dladdr1 can provide more information than 4523 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4524 // and is available on linker patches for 5.7 and 5.8. 4525 // libdl.so must have been loaded, this call is just an entry lookup 4526 void * hdl = dlopen("libdl.so", RTLD_NOW); 4527 if (hdl) 4528 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4529 4530 // (Solaris only) this switches to calls that actually do locking. 4531 ThreadCritical::initialize(); 4532 4533 main_thread = thr_self(); 4534 4535 // Constant minimum stack size allowed. It must be at least 4536 // the minimum of what the OS supports (thr_min_stack()), and 4537 // enough to allow the thread to get to user bytecode execution. 4538 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4539 // If the pagesize of the VM is greater than 8K determine the appropriate 4540 // number of initial guard pages. The user can change this with the 4541 // command line arguments, if needed. 4542 if (vm_page_size() > 8*K) { 4543 StackYellowPages = 1; 4544 StackRedPages = 1; 4545 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4546 } 4547} 4548 4549// To install functions for atexit system call 4550extern "C" { 4551 static void perfMemory_exit_helper() { 4552 perfMemory_exit(); 4553 } 4554} 4555 4556// this is called _after_ the global arguments have been parsed 4557jint os::init_2(void) { 4558 // try to enable extended file IO ASAP, see 6431278 4559 os::Solaris::try_enable_extended_io(); 4560 4561 // Allocate a single page and mark it as readable for safepoint polling. Also 4562 // use this first mmap call to check support for MAP_ALIGN. 4563 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4564 page_size, 4565 MAP_PRIVATE | MAP_ALIGN, 4566 PROT_READ); 4567 if (polling_page == NULL) { 4568 has_map_align = false; 4569 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4570 PROT_READ); 4571 } 4572 4573 os::set_polling_page(polling_page); 4574 4575#ifndef PRODUCT 4576 if (Verbose && PrintMiscellaneous) 4577 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4578#endif 4579 4580 if (!UseMembar) { 4581 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE); 4582 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4583 os::set_memory_serialize_page(mem_serialize_page); 4584 4585#ifndef PRODUCT 4586 if (Verbose && PrintMiscellaneous) 4587 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4588#endif 4589 } 4590 4591 // Check minimum allowable stack size for thread creation and to initialize 4592 // the java system classes, including StackOverflowError - depends on page 4593 // size. Add a page for compiler2 recursion in main thread. 4594 // Add in 2*BytesPerWord times page size to account for VM stack during 4595 // class initialization depending on 32 or 64 bit VM. 4596 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4597 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 4598 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 4599 4600 size_t threadStackSizeInBytes = ThreadStackSize * K; 4601 if (threadStackSizeInBytes != 0 && 4602 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 4603 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4604 os::Solaris::min_stack_allowed/K); 4605 return JNI_ERR; 4606 } 4607 4608 // For 64kbps there will be a 64kb page size, which makes 4609 // the usable default stack size quite a bit less. Increase the 4610 // stack for 64kb (or any > than 8kb) pages, this increases 4611 // virtual memory fragmentation (since we're not creating the 4612 // stack on a power of 2 boundary. The real fix for this 4613 // should be to fix the guard page mechanism. 4614 4615 if (vm_page_size() > 8*K) { 4616 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4617 ? threadStackSizeInBytes + 4618 ((StackYellowPages + StackRedPages) * vm_page_size()) 4619 : 0; 4620 ThreadStackSize = threadStackSizeInBytes/K; 4621 } 4622 4623 // Make the stack size a multiple of the page size so that 4624 // the yellow/red zones can be guarded. 4625 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4626 vm_page_size())); 4627 4628 Solaris::libthread_init(); 4629 4630 if (UseNUMA) { 4631 if (!Solaris::liblgrp_init()) { 4632 UseNUMA = false; 4633 } else { 4634 size_t lgrp_limit = os::numa_get_groups_num(); 4635 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 4636 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4637 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal); 4638 if (lgrp_num < 2) { 4639 // There's only one locality group, disable NUMA. 4640 UseNUMA = false; 4641 } 4642 } 4643 if (!UseNUMA && ForceNUMA) { 4644 UseNUMA = true; 4645 } 4646 } 4647 4648 Solaris::signal_sets_init(); 4649 Solaris::init_signal_mem(); 4650 Solaris::install_signal_handlers(); 4651 4652 if (libjsigversion < JSIG_VERSION_1_4_1) { 4653 Maxlibjsigsigs = OLDMAXSIGNUM; 4654 } 4655 4656 // initialize synchronization primitives to use either thread or 4657 // lwp synchronization (controlled by UseLWPSynchronization) 4658 Solaris::synchronization_init(); 4659 4660 if (MaxFDLimit) { 4661 // set the number of file descriptors to max. print out error 4662 // if getrlimit/setrlimit fails but continue regardless. 4663 struct rlimit nbr_files; 4664 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4665 if (status != 0) { 4666 if (PrintMiscellaneous && (Verbose || WizardMode)) 4667 perror("os::init_2 getrlimit failed"); 4668 } else { 4669 nbr_files.rlim_cur = nbr_files.rlim_max; 4670 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4671 if (status != 0) { 4672 if (PrintMiscellaneous && (Verbose || WizardMode)) 4673 perror("os::init_2 setrlimit failed"); 4674 } 4675 } 4676 } 4677 4678 // Calculate theoretical max. size of Threads to guard gainst 4679 // artifical out-of-memory situations, where all available address- 4680 // space has been reserved by thread stacks. Default stack size is 1Mb. 4681 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4682 JavaThread::stack_size_at_create() : (1*K*K); 4683 assert(pre_thread_stack_size != 0, "Must have a stack"); 4684 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4685 // we should start doing Virtual Memory banging. Currently when the threads will 4686 // have used all but 200Mb of space. 4687 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4688 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4689 4690 // at-exit methods are called in the reverse order of their registration. 4691 // In Solaris 7 and earlier, atexit functions are called on return from 4692 // main or as a result of a call to exit(3C). There can be only 32 of 4693 // these functions registered and atexit() does not set errno. In Solaris 4694 // 8 and later, there is no limit to the number of functions registered 4695 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4696 // functions are called upon dlclose(3DL) in addition to return from main 4697 // and exit(3C). 4698 4699 if (PerfAllowAtExitRegistration) { 4700 // only register atexit functions if PerfAllowAtExitRegistration is set. 4701 // atexit functions can be delayed until process exit time, which 4702 // can be problematic for embedded VM situations. Embedded VMs should 4703 // call DestroyJavaVM() to assure that VM resources are released. 4704 4705 // note: perfMemory_exit_helper atexit function may be removed in 4706 // the future if the appropriate cleanup code can be added to the 4707 // VM_Exit VMOperation's doit method. 4708 if (atexit(perfMemory_exit_helper) != 0) { 4709 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4710 } 4711 } 4712 4713 // Init pset_loadavg function pointer 4714 init_pset_getloadavg_ptr(); 4715 4716 return JNI_OK; 4717} 4718 4719void os::init_3(void) { 4720 return; 4721} 4722 4723// Mark the polling page as unreadable 4724void os::make_polling_page_unreadable(void) { 4725 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) 4726 fatal("Could not disable polling page"); 4727}; 4728 4729// Mark the polling page as readable 4730void os::make_polling_page_readable(void) { 4731 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) 4732 fatal("Could not enable polling page"); 4733}; 4734 4735// OS interface. 4736 4737bool os::check_heap(bool force) { return true; } 4738 4739typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 4740static vsnprintf_t sol_vsnprintf = NULL; 4741 4742int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 4743 if (!sol_vsnprintf) { 4744 //search for the named symbol in the objects that were loaded after libjvm 4745 void* where = RTLD_NEXT; 4746 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4747 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4748 if (!sol_vsnprintf){ 4749 //search for the named symbol in the objects that were loaded before libjvm 4750 where = RTLD_DEFAULT; 4751 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4752 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4753 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 4754 } 4755 } 4756 return (*sol_vsnprintf)(buf, count, fmt, argptr); 4757} 4758 4759 4760// Is a (classpath) directory empty? 4761bool os::dir_is_empty(const char* path) { 4762 DIR *dir = NULL; 4763 struct dirent *ptr; 4764 4765 dir = opendir(path); 4766 if (dir == NULL) return true; 4767 4768 /* Scan the directory */ 4769 bool result = true; 4770 char buf[sizeof(struct dirent) + MAX_PATH]; 4771 struct dirent *dbuf = (struct dirent *) buf; 4772 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4773 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4774 result = false; 4775 } 4776 } 4777 closedir(dir); 4778 return result; 4779} 4780 4781// This code originates from JDK's sysOpen and open64_w 4782// from src/solaris/hpi/src/system_md.c 4783 4784#ifndef O_DELETE 4785#define O_DELETE 0x10000 4786#endif 4787 4788// Open a file. Unlink the file immediately after open returns 4789// if the specified oflag has the O_DELETE flag set. 4790// O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c 4791 4792int os::open(const char *path, int oflag, int mode) { 4793 if (strlen(path) > MAX_PATH - 1) { 4794 errno = ENAMETOOLONG; 4795 return -1; 4796 } 4797 int fd; 4798 int o_delete = (oflag & O_DELETE); 4799 oflag = oflag & ~O_DELETE; 4800 4801 fd = ::open64(path, oflag, mode); 4802 if (fd == -1) return -1; 4803 4804 //If the open succeeded, the file might still be a directory 4805 { 4806 struct stat64 buf64; 4807 int ret = ::fstat64(fd, &buf64); 4808 int st_mode = buf64.st_mode; 4809 4810 if (ret != -1) { 4811 if ((st_mode & S_IFMT) == S_IFDIR) { 4812 errno = EISDIR; 4813 ::close(fd); 4814 return -1; 4815 } 4816 } else { 4817 ::close(fd); 4818 return -1; 4819 } 4820 } 4821 /* 4822 * 32-bit Solaris systems suffer from: 4823 * 4824 * - an historical default soft limit of 256 per-process file 4825 * descriptors that is too low for many Java programs. 4826 * 4827 * - a design flaw where file descriptors created using stdio 4828 * fopen must be less than 256, _even_ when the first limit above 4829 * has been raised. This can cause calls to fopen (but not calls to 4830 * open, for example) to fail mysteriously, perhaps in 3rd party 4831 * native code (although the JDK itself uses fopen). One can hardly 4832 * criticize them for using this most standard of all functions. 4833 * 4834 * We attempt to make everything work anyways by: 4835 * 4836 * - raising the soft limit on per-process file descriptors beyond 4837 * 256 4838 * 4839 * - As of Solaris 10u4, we can request that Solaris raise the 256 4840 * stdio fopen limit by calling function enable_extended_FILE_stdio. 4841 * This is done in init_2 and recorded in enabled_extended_FILE_stdio 4842 * 4843 * - If we are stuck on an old (pre 10u4) Solaris system, we can 4844 * workaround the bug by remapping non-stdio file descriptors below 4845 * 256 to ones beyond 256, which is done below. 4846 * 4847 * See: 4848 * 1085341: 32-bit stdio routines should support file descriptors >255 4849 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files 4850 * 6431278: Netbeans crash on 32 bit Solaris: need to call 4851 * enable_extended_FILE_stdio() in VM initialisation 4852 * Giri Mandalika's blog 4853 * http://technopark02.blogspot.com/2005_05_01_archive.html 4854 */ 4855#ifndef _LP64 4856 if ((!enabled_extended_FILE_stdio) && fd < 256) { 4857 int newfd = ::fcntl(fd, F_DUPFD, 256); 4858 if (newfd != -1) { 4859 ::close(fd); 4860 fd = newfd; 4861 } 4862 } 4863#endif // 32-bit Solaris 4864 /* 4865 * All file descriptors that are opened in the JVM and not 4866 * specifically destined for a subprocess should have the 4867 * close-on-exec flag set. If we don't set it, then careless 3rd 4868 * party native code might fork and exec without closing all 4869 * appropriate file descriptors (e.g. as we do in closeDescriptors in 4870 * UNIXProcess.c), and this in turn might: 4871 * 4872 * - cause end-of-file to fail to be detected on some file 4873 * descriptors, resulting in mysterious hangs, or 4874 * 4875 * - might cause an fopen in the subprocess to fail on a system 4876 * suffering from bug 1085341. 4877 * 4878 * (Yes, the default setting of the close-on-exec flag is a Unix 4879 * design flaw) 4880 * 4881 * See: 4882 * 1085341: 32-bit stdio routines should support file descriptors >255 4883 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed 4884 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 4885 */ 4886#ifdef FD_CLOEXEC 4887 { 4888 int flags = ::fcntl(fd, F_GETFD); 4889 if (flags != -1) 4890 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 4891 } 4892#endif 4893 4894 if (o_delete != 0) { 4895 ::unlink(path); 4896 } 4897 return fd; 4898} 4899 4900// create binary file, rewriting existing file if required 4901int os::create_binary_file(const char* path, bool rewrite_existing) { 4902 int oflags = O_WRONLY | O_CREAT; 4903 if (!rewrite_existing) { 4904 oflags |= O_EXCL; 4905 } 4906 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4907} 4908 4909// return current position of file pointer 4910jlong os::current_file_offset(int fd) { 4911 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4912} 4913 4914// move file pointer to the specified offset 4915jlong os::seek_to_file_offset(int fd, jlong offset) { 4916 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4917} 4918 4919jlong os::lseek(int fd, jlong offset, int whence) { 4920 return (jlong) ::lseek64(fd, offset, whence); 4921} 4922 4923char * os::native_path(char *path) { 4924 return path; 4925} 4926 4927int os::ftruncate(int fd, jlong length) { 4928 return ::ftruncate64(fd, length); 4929} 4930 4931int os::fsync(int fd) { 4932 RESTARTABLE_RETURN_INT(::fsync(fd)); 4933} 4934 4935int os::available(int fd, jlong *bytes) { 4936 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 4937 "Assumed _thread_in_native"); 4938 jlong cur, end; 4939 int mode; 4940 struct stat64 buf64; 4941 4942 if (::fstat64(fd, &buf64) >= 0) { 4943 mode = buf64.st_mode; 4944 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 4945 int n,ioctl_return; 4946 4947 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return); 4948 if (ioctl_return>= 0) { 4949 *bytes = n; 4950 return 1; 4951 } 4952 } 4953 } 4954 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 4955 return 0; 4956 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 4957 return 0; 4958 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 4959 return 0; 4960 } 4961 *bytes = end - cur; 4962 return 1; 4963} 4964 4965// Map a block of memory. 4966char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4967 char *addr, size_t bytes, bool read_only, 4968 bool allow_exec) { 4969 int prot; 4970 int flags; 4971 4972 if (read_only) { 4973 prot = PROT_READ; 4974 flags = MAP_SHARED; 4975 } else { 4976 prot = PROT_READ | PROT_WRITE; 4977 flags = MAP_PRIVATE; 4978 } 4979 4980 if (allow_exec) { 4981 prot |= PROT_EXEC; 4982 } 4983 4984 if (addr != NULL) { 4985 flags |= MAP_FIXED; 4986 } 4987 4988 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4989 fd, file_offset); 4990 if (mapped_address == MAP_FAILED) { 4991 return NULL; 4992 } 4993 return mapped_address; 4994} 4995 4996 4997// Remap a block of memory. 4998char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 4999 char *addr, size_t bytes, bool read_only, 5000 bool allow_exec) { 5001 // same as map_memory() on this OS 5002 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5003 allow_exec); 5004} 5005 5006 5007// Unmap a block of memory. 5008bool os::pd_unmap_memory(char* addr, size_t bytes) { 5009 return munmap(addr, bytes) == 0; 5010} 5011 5012void os::pause() { 5013 char filename[MAX_PATH]; 5014 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5015 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5016 } else { 5017 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5018 } 5019 5020 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5021 if (fd != -1) { 5022 struct stat buf; 5023 ::close(fd); 5024 while (::stat(filename, &buf) == 0) { 5025 (void)::poll(NULL, 0, 100); 5026 } 5027 } else { 5028 jio_fprintf(stderr, 5029 "Could not open pause file '%s', continuing immediately.\n", filename); 5030 } 5031} 5032 5033#ifndef PRODUCT 5034#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5035// Turn this on if you need to trace synch operations. 5036// Set RECORD_SYNCH_LIMIT to a large-enough value, 5037// and call record_synch_enable and record_synch_disable 5038// around the computation of interest. 5039 5040void record_synch(char* name, bool returning); // defined below 5041 5042class RecordSynch { 5043 char* _name; 5044 public: 5045 RecordSynch(char* name) :_name(name) 5046 { record_synch(_name, false); } 5047 ~RecordSynch() { record_synch(_name, true); } 5048}; 5049 5050#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5051extern "C" ret name params { \ 5052 typedef ret name##_t params; \ 5053 static name##_t* implem = NULL; \ 5054 static int callcount = 0; \ 5055 if (implem == NULL) { \ 5056 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5057 if (implem == NULL) fatal(dlerror()); \ 5058 } \ 5059 ++callcount; \ 5060 RecordSynch _rs(#name); \ 5061 inner; \ 5062 return implem args; \ 5063} 5064// in dbx, examine callcounts this way: 5065// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5066 5067#define CHECK_POINTER_OK(p) \ 5068 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 5069#define CHECK_MU \ 5070 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5071#define CHECK_CV \ 5072 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5073#define CHECK_P(p) \ 5074 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5075 5076#define CHECK_MUTEX(mutex_op) \ 5077CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5078 5079CHECK_MUTEX( mutex_lock) 5080CHECK_MUTEX( _mutex_lock) 5081CHECK_MUTEX( mutex_unlock) 5082CHECK_MUTEX(_mutex_unlock) 5083CHECK_MUTEX( mutex_trylock) 5084CHECK_MUTEX(_mutex_trylock) 5085 5086#define CHECK_COND(cond_op) \ 5087CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5088 5089CHECK_COND( cond_wait); 5090CHECK_COND(_cond_wait); 5091CHECK_COND(_cond_wait_cancel); 5092 5093#define CHECK_COND2(cond_op) \ 5094CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5095 5096CHECK_COND2( cond_timedwait); 5097CHECK_COND2(_cond_timedwait); 5098CHECK_COND2(_cond_timedwait_cancel); 5099 5100// do the _lwp_* versions too 5101#define mutex_t lwp_mutex_t 5102#define cond_t lwp_cond_t 5103CHECK_MUTEX( _lwp_mutex_lock) 5104CHECK_MUTEX( _lwp_mutex_unlock) 5105CHECK_MUTEX( _lwp_mutex_trylock) 5106CHECK_MUTEX( __lwp_mutex_lock) 5107CHECK_MUTEX( __lwp_mutex_unlock) 5108CHECK_MUTEX( __lwp_mutex_trylock) 5109CHECK_MUTEX(___lwp_mutex_lock) 5110CHECK_MUTEX(___lwp_mutex_unlock) 5111 5112CHECK_COND( _lwp_cond_wait); 5113CHECK_COND( __lwp_cond_wait); 5114CHECK_COND(___lwp_cond_wait); 5115 5116CHECK_COND2( _lwp_cond_timedwait); 5117CHECK_COND2( __lwp_cond_timedwait); 5118#undef mutex_t 5119#undef cond_t 5120 5121CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5122CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5123CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5124CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5125CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5126CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5127CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5128CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5129 5130 5131// recording machinery: 5132 5133enum { RECORD_SYNCH_LIMIT = 200 }; 5134char* record_synch_name[RECORD_SYNCH_LIMIT]; 5135void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5136bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5137thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5138int record_synch_count = 0; 5139bool record_synch_enabled = false; 5140 5141// in dbx, examine recorded data this way: 5142// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5143 5144void record_synch(char* name, bool returning) { 5145 if (record_synch_enabled) { 5146 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5147 record_synch_name[record_synch_count] = name; 5148 record_synch_returning[record_synch_count] = returning; 5149 record_synch_thread[record_synch_count] = thr_self(); 5150 record_synch_arg0ptr[record_synch_count] = &name; 5151 record_synch_count++; 5152 } 5153 // put more checking code here: 5154 // ... 5155 } 5156} 5157 5158void record_synch_enable() { 5159 // start collecting trace data, if not already doing so 5160 if (!record_synch_enabled) record_synch_count = 0; 5161 record_synch_enabled = true; 5162} 5163 5164void record_synch_disable() { 5165 // stop collecting trace data 5166 record_synch_enabled = false; 5167} 5168 5169#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5170#endif // PRODUCT 5171 5172const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5173const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5174 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5175 5176 5177// JVMTI & JVM monitoring and management support 5178// The thread_cpu_time() and current_thread_cpu_time() are only 5179// supported if is_thread_cpu_time_supported() returns true. 5180// They are not supported on Solaris T1. 5181 5182// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5183// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5184// of a thread. 5185// 5186// current_thread_cpu_time() and thread_cpu_time(Thread *) 5187// returns the fast estimate available on the platform. 5188 5189// hrtime_t gethrvtime() return value includes 5190// user time but does not include system time 5191jlong os::current_thread_cpu_time() { 5192 return (jlong) gethrvtime(); 5193} 5194 5195jlong os::thread_cpu_time(Thread *thread) { 5196 // return user level CPU time only to be consistent with 5197 // what current_thread_cpu_time returns. 5198 // thread_cpu_time_info() must be changed if this changes 5199 return os::thread_cpu_time(thread, false /* user time only */); 5200} 5201 5202jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5203 if (user_sys_cpu_time) { 5204 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5205 } else { 5206 return os::current_thread_cpu_time(); 5207 } 5208} 5209 5210jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5211 char proc_name[64]; 5212 int count; 5213 prusage_t prusage; 5214 jlong lwp_time; 5215 int fd; 5216 5217 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5218 getpid(), 5219 thread->osthread()->lwp_id()); 5220 fd = ::open(proc_name, O_RDONLY); 5221 if (fd == -1) return -1; 5222 5223 do { 5224 count = ::pread(fd, 5225 (void *)&prusage.pr_utime, 5226 thr_time_size, 5227 thr_time_off); 5228 } while (count < 0 && errno == EINTR); 5229 ::close(fd); 5230 if (count < 0) return -1; 5231 5232 if (user_sys_cpu_time) { 5233 // user + system CPU time 5234 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5235 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5236 (jlong)prusage.pr_stime.tv_nsec + 5237 (jlong)prusage.pr_utime.tv_nsec; 5238 } else { 5239 // user level CPU time only 5240 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5241 (jlong)prusage.pr_utime.tv_nsec; 5242 } 5243 5244 return (lwp_time); 5245} 5246 5247void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5248 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5249 info_ptr->may_skip_backward = false; // elapsed time not wall time 5250 info_ptr->may_skip_forward = false; // elapsed time not wall time 5251 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5252} 5253 5254void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5255 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5256 info_ptr->may_skip_backward = false; // elapsed time not wall time 5257 info_ptr->may_skip_forward = false; // elapsed time not wall time 5258 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5259} 5260 5261bool os::is_thread_cpu_time_supported() { 5262 return true; 5263} 5264 5265// System loadavg support. Returns -1 if load average cannot be obtained. 5266// Return the load average for our processor set if the primitive exists 5267// (Solaris 9 and later). Otherwise just return system wide loadavg. 5268int os::loadavg(double loadavg[], int nelem) { 5269 if (pset_getloadavg_ptr != NULL) { 5270 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5271 } else { 5272 return ::getloadavg(loadavg, nelem); 5273 } 5274} 5275 5276//--------------------------------------------------------------------------------- 5277 5278bool os::find(address addr, outputStream* st) { 5279 Dl_info dlinfo; 5280 memset(&dlinfo, 0, sizeof(dlinfo)); 5281 if (dladdr(addr, &dlinfo) != 0) { 5282 st->print(PTR_FORMAT ": ", addr); 5283 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 5284 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5285 } else if (dlinfo.dli_fbase != NULL) 5286 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5287 else 5288 st->print("<absolute address>"); 5289 if (dlinfo.dli_fname != NULL) { 5290 st->print(" in %s", dlinfo.dli_fname); 5291 } 5292 if (dlinfo.dli_fbase != NULL) { 5293 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 5294 } 5295 st->cr(); 5296 5297 if (Verbose) { 5298 // decode some bytes around the PC 5299 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 5300 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 5301 address lowest = (address) dlinfo.dli_sname; 5302 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5303 if (begin < lowest) begin = lowest; 5304 Dl_info dlinfo2; 5305 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 5306 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5307 end = (address) dlinfo2.dli_saddr; 5308 Disassembler::decode(begin, end, st); 5309 } 5310 return true; 5311 } 5312 return false; 5313} 5314 5315// Following function has been added to support HotSparc's libjvm.so running 5316// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5317// src/solaris/hpi/native_threads in the EVM codebase. 5318// 5319// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5320// libraries and should thus be removed. We will leave it behind for a while 5321// until we no longer want to able to run on top of 1.3.0 Solaris production 5322// JDK. See 4341971. 5323 5324#define STACK_SLACK 0x800 5325 5326extern "C" { 5327 intptr_t sysThreadAvailableStackWithSlack() { 5328 stack_t st; 5329 intptr_t retval, stack_top; 5330 retval = thr_stksegment(&st); 5331 assert(retval == 0, "incorrect return value from thr_stksegment"); 5332 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5333 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5334 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5335 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5336 } 5337} 5338 5339// ObjectMonitor park-unpark infrastructure ... 5340// 5341// We implement Solaris and Linux PlatformEvents with the 5342// obvious condvar-mutex-flag triple. 5343// Another alternative that works quite well is pipes: 5344// Each PlatformEvent consists of a pipe-pair. 5345// The thread associated with the PlatformEvent 5346// calls park(), which reads from the input end of the pipe. 5347// Unpark() writes into the other end of the pipe. 5348// The write-side of the pipe must be set NDELAY. 5349// Unfortunately pipes consume a large # of handles. 5350// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5351// Using pipes for the 1st few threads might be workable, however. 5352// 5353// park() is permitted to return spuriously. 5354// Callers of park() should wrap the call to park() in 5355// an appropriate loop. A litmus test for the correct 5356// usage of park is the following: if park() were modified 5357// to immediately return 0 your code should still work, 5358// albeit degenerating to a spin loop. 5359// 5360// An interesting optimization for park() is to use a trylock() 5361// to attempt to acquire the mutex. If the trylock() fails 5362// then we know that a concurrent unpark() operation is in-progress. 5363// in that case the park() code could simply set _count to 0 5364// and return immediately. The subsequent park() operation *might* 5365// return immediately. That's harmless as the caller of park() is 5366// expected to loop. By using trylock() we will have avoided a 5367// avoided a context switch caused by contention on the per-thread mutex. 5368// 5369// TODO-FIXME: 5370// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5371// objectmonitor implementation. 5372// 2. Collapse the JSR166 parker event, and the 5373// objectmonitor ParkEvent into a single "Event" construct. 5374// 3. In park() and unpark() add: 5375// assert (Thread::current() == AssociatedWith). 5376// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5377// 1-out-of-N park() operations will return immediately. 5378// 5379// _Event transitions in park() 5380// -1 => -1 : illegal 5381// 1 => 0 : pass - return immediately 5382// 0 => -1 : block 5383// 5384// _Event serves as a restricted-range semaphore. 5385// 5386// Another possible encoding of _Event would be with 5387// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5388// 5389// TODO-FIXME: add DTRACE probes for: 5390// 1. Tx parks 5391// 2. Ty unparks Tx 5392// 3. Tx resumes from park 5393 5394 5395// value determined through experimentation 5396#define ROUNDINGFIX 11 5397 5398// utility to compute the abstime argument to timedwait. 5399// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5400 5401static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5402 // millis is the relative timeout time 5403 // abstime will be the absolute timeout time 5404 if (millis < 0) millis = 0; 5405 struct timeval now; 5406 int status = gettimeofday(&now, NULL); 5407 assert(status == 0, "gettimeofday"); 5408 jlong seconds = millis / 1000; 5409 jlong max_wait_period; 5410 5411 if (UseLWPSynchronization) { 5412 // forward port of fix for 4275818 (not sleeping long enough) 5413 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5414 // _lwp_cond_timedwait() used a round_down algorithm rather 5415 // than a round_up. For millis less than our roundfactor 5416 // it rounded down to 0 which doesn't meet the spec. 5417 // For millis > roundfactor we may return a bit sooner, but 5418 // since we can not accurately identify the patch level and 5419 // this has already been fixed in Solaris 9 and 8 we will 5420 // leave it alone rather than always rounding down. 5421 5422 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5423 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5424 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5425 max_wait_period = 21000000; 5426 } else { 5427 max_wait_period = 50000000; 5428 } 5429 millis %= 1000; 5430 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5431 seconds = max_wait_period; 5432 } 5433 abstime->tv_sec = now.tv_sec + seconds; 5434 long usec = now.tv_usec + millis * 1000; 5435 if (usec >= 1000000) { 5436 abstime->tv_sec += 1; 5437 usec -= 1000000; 5438 } 5439 abstime->tv_nsec = usec * 1000; 5440 return abstime; 5441} 5442 5443// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5444// Conceptually TryPark() should be equivalent to park(0). 5445 5446int os::PlatformEvent::TryPark() { 5447 for (;;) { 5448 const int v = _Event; 5449 guarantee((v == 0) || (v == 1), "invariant"); 5450 if (Atomic::cmpxchg(0, &_Event, v) == v) return v; 5451 } 5452} 5453 5454void os::PlatformEvent::park() { // AKA: down() 5455 // Invariant: Only the thread associated with the Event/PlatformEvent 5456 // may call park(). 5457 int v; 5458 for (;;) { 5459 v = _Event; 5460 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5461 } 5462 guarantee(v >= 0, "invariant"); 5463 if (v == 0) { 5464 // Do this the hard way by blocking ... 5465 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5466 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5467 // Only for SPARC >= V8PlusA 5468#if defined(__sparc) && defined(COMPILER2) 5469 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5470#endif 5471 int status = os::Solaris::mutex_lock(_mutex); 5472 assert_status(status == 0, status, "mutex_lock"); 5473 guarantee(_nParked == 0, "invariant"); 5474 ++_nParked; 5475 while (_Event < 0) { 5476 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5477 // Treat this the same as if the wait was interrupted 5478 // With usr/lib/lwp going to kernel, always handle ETIME 5479 status = os::Solaris::cond_wait(_cond, _mutex); 5480 if (status == ETIME) status = EINTR; 5481 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5482 } 5483 --_nParked; 5484 _Event = 0; 5485 status = os::Solaris::mutex_unlock(_mutex); 5486 assert_status(status == 0, status, "mutex_unlock"); 5487 // Paranoia to ensure our locked and lock-free paths interact 5488 // correctly with each other. 5489 OrderAccess::fence(); 5490 } 5491} 5492 5493int os::PlatformEvent::park(jlong millis) { 5494 guarantee(_nParked == 0, "invariant"); 5495 int v; 5496 for (;;) { 5497 v = _Event; 5498 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5499 } 5500 guarantee(v >= 0, "invariant"); 5501 if (v != 0) return OS_OK; 5502 5503 int ret = OS_TIMEOUT; 5504 timestruc_t abst; 5505 compute_abstime(&abst, millis); 5506 5507 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5508 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5509 // Only for SPARC >= V8PlusA 5510#if defined(__sparc) && defined(COMPILER2) 5511 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5512#endif 5513 int status = os::Solaris::mutex_lock(_mutex); 5514 assert_status(status == 0, status, "mutex_lock"); 5515 guarantee(_nParked == 0, "invariant"); 5516 ++_nParked; 5517 while (_Event < 0) { 5518 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5519 assert_status(status == 0 || status == EINTR || 5520 status == ETIME || status == ETIMEDOUT, 5521 status, "cond_timedwait"); 5522 if (!FilterSpuriousWakeups) break; // previous semantics 5523 if (status == ETIME || status == ETIMEDOUT) break; 5524 // We consume and ignore EINTR and spurious wakeups. 5525 } 5526 --_nParked; 5527 if (_Event >= 0) ret = OS_OK; 5528 _Event = 0; 5529 status = os::Solaris::mutex_unlock(_mutex); 5530 assert_status(status == 0, status, "mutex_unlock"); 5531 // Paranoia to ensure our locked and lock-free paths interact 5532 // correctly with each other. 5533 OrderAccess::fence(); 5534 return ret; 5535} 5536 5537void os::PlatformEvent::unpark() { 5538 // Transitions for _Event: 5539 // 0 :=> 1 5540 // 1 :=> 1 5541 // -1 :=> either 0 or 1; must signal target thread 5542 // That is, we can safely transition _Event from -1 to either 5543 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back 5544 // unpark() calls. 5545 // See also: "Semaphores in Plan 9" by Mullender & Cox 5546 // 5547 // Note: Forcing a transition from "-1" to "1" on an unpark() means 5548 // that it will take two back-to-back park() calls for the owning 5549 // thread to block. This has the benefit of forcing a spurious return 5550 // from the first park() call after an unpark() call which will help 5551 // shake out uses of park() and unpark() without condition variables. 5552 5553 if (Atomic::xchg(1, &_Event) >= 0) return; 5554 5555 // If the thread associated with the event was parked, wake it. 5556 // Wait for the thread assoc with the PlatformEvent to vacate. 5557 int status = os::Solaris::mutex_lock(_mutex); 5558 assert_status(status == 0, status, "mutex_lock"); 5559 int AnyWaiters = _nParked; 5560 status = os::Solaris::mutex_unlock(_mutex); 5561 assert_status(status == 0, status, "mutex_unlock"); 5562 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 5563 if (AnyWaiters != 0) { 5564 // We intentional signal *after* dropping the lock 5565 // to avoid a common class of futile wakeups. 5566 status = os::Solaris::cond_signal(_cond); 5567 assert_status(status == 0, status, "cond_signal"); 5568 } 5569} 5570 5571// JSR166 5572// ------------------------------------------------------- 5573 5574/* 5575 * The solaris and linux implementations of park/unpark are fairly 5576 * conservative for now, but can be improved. They currently use a 5577 * mutex/condvar pair, plus _counter. 5578 * Park decrements _counter if > 0, else does a condvar wait. Unpark 5579 * sets count to 1 and signals condvar. Only one thread ever waits 5580 * on the condvar. Contention seen when trying to park implies that someone 5581 * is unparking you, so don't wait. And spurious returns are fine, so there 5582 * is no need to track notifications. 5583 */ 5584 5585#define MAX_SECS 100000000 5586/* 5587 * This code is common to linux and solaris and will be moved to a 5588 * common place in dolphin. 5589 * 5590 * The passed in time value is either a relative time in nanoseconds 5591 * or an absolute time in milliseconds. Either way it has to be unpacked 5592 * into suitable seconds and nanoseconds components and stored in the 5593 * given timespec structure. 5594 * Given time is a 64-bit value and the time_t used in the timespec is only 5595 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 5596 * overflow if times way in the future are given. Further on Solaris versions 5597 * prior to 10 there is a restriction (see cond_timedwait) that the specified 5598 * number of seconds, in abstime, is less than current_time + 100,000,000. 5599 * As it will be 28 years before "now + 100000000" will overflow we can 5600 * ignore overflow and just impose a hard-limit on seconds using the value 5601 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 5602 * years from "now". 5603 */ 5604static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5605 assert(time > 0, "convertTime"); 5606 5607 struct timeval now; 5608 int status = gettimeofday(&now, NULL); 5609 assert(status == 0, "gettimeofday"); 5610 5611 time_t max_secs = now.tv_sec + MAX_SECS; 5612 5613 if (isAbsolute) { 5614 jlong secs = time / 1000; 5615 if (secs > max_secs) { 5616 absTime->tv_sec = max_secs; 5617 } 5618 else { 5619 absTime->tv_sec = secs; 5620 } 5621 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5622 } 5623 else { 5624 jlong secs = time / NANOSECS_PER_SEC; 5625 if (secs >= MAX_SECS) { 5626 absTime->tv_sec = max_secs; 5627 absTime->tv_nsec = 0; 5628 } 5629 else { 5630 absTime->tv_sec = now.tv_sec + secs; 5631 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5632 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5633 absTime->tv_nsec -= NANOSECS_PER_SEC; 5634 ++absTime->tv_sec; // note: this must be <= max_secs 5635 } 5636 } 5637 } 5638 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5639 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5640 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5641 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5642} 5643 5644void Parker::park(bool isAbsolute, jlong time) { 5645 // Ideally we'd do something useful while spinning, such 5646 // as calling unpackTime(). 5647 5648 // Optional fast-path check: 5649 // Return immediately if a permit is available. 5650 // We depend on Atomic::xchg() having full barrier semantics 5651 // since we are doing a lock-free update to _counter. 5652 if (Atomic::xchg(0, &_counter) > 0) return; 5653 5654 // Optional fast-exit: Check interrupt before trying to wait 5655 Thread* thread = Thread::current(); 5656 assert(thread->is_Java_thread(), "Must be JavaThread"); 5657 JavaThread *jt = (JavaThread *)thread; 5658 if (Thread::is_interrupted(thread, false)) { 5659 return; 5660 } 5661 5662 // First, demultiplex/decode time arguments 5663 timespec absTime; 5664 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all 5665 return; 5666 } 5667 if (time > 0) { 5668 // Warning: this code might be exposed to the old Solaris time 5669 // round-down bugs. Grep "roundingFix" for details. 5670 unpackTime(&absTime, isAbsolute, time); 5671 } 5672 5673 // Enter safepoint region 5674 // Beware of deadlocks such as 6317397. 5675 // The per-thread Parker:: _mutex is a classic leaf-lock. 5676 // In particular a thread must never block on the Threads_lock while 5677 // holding the Parker:: mutex. If safepoints are pending both the 5678 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5679 ThreadBlockInVM tbivm(jt); 5680 5681 // Don't wait if cannot get lock since interference arises from 5682 // unblocking. Also. check interrupt before trying wait 5683 if (Thread::is_interrupted(thread, false) || 5684 os::Solaris::mutex_trylock(_mutex) != 0) { 5685 return; 5686 } 5687 5688 int status; 5689 5690 if (_counter > 0) { // no wait needed 5691 _counter = 0; 5692 status = os::Solaris::mutex_unlock(_mutex); 5693 assert(status == 0, "invariant"); 5694 // Paranoia to ensure our locked and lock-free paths interact 5695 // correctly with each other and Java-level accesses. 5696 OrderAccess::fence(); 5697 return; 5698 } 5699 5700#ifdef ASSERT 5701 // Don't catch signals while blocked; let the running threads have the signals. 5702 // (This allows a debugger to break into the running thread.) 5703 sigset_t oldsigs; 5704 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5705 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5706#endif 5707 5708 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5709 jt->set_suspend_equivalent(); 5710 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5711 5712 // Do this the hard way by blocking ... 5713 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5714 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5715 // Only for SPARC >= V8PlusA 5716#if defined(__sparc) && defined(COMPILER2) 5717 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5718#endif 5719 5720 if (time == 0) { 5721 status = os::Solaris::cond_wait(_cond, _mutex); 5722 } else { 5723 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5724 } 5725 // Note that an untimed cond_wait() can sometimes return ETIME on older 5726 // versions of the Solaris. 5727 assert_status(status == 0 || status == EINTR || 5728 status == ETIME || status == ETIMEDOUT, 5729 status, "cond_timedwait"); 5730 5731#ifdef ASSERT 5732 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5733#endif 5734 _counter = 0; 5735 status = os::Solaris::mutex_unlock(_mutex); 5736 assert_status(status == 0, status, "mutex_unlock"); 5737 // Paranoia to ensure our locked and lock-free paths interact 5738 // correctly with each other and Java-level accesses. 5739 OrderAccess::fence(); 5740 5741 // If externally suspended while waiting, re-suspend 5742 if (jt->handle_special_suspend_equivalent_condition()) { 5743 jt->java_suspend_self(); 5744 } 5745} 5746 5747void Parker::unpark() { 5748 int s, status; 5749 status = os::Solaris::mutex_lock(_mutex); 5750 assert(status == 0, "invariant"); 5751 s = _counter; 5752 _counter = 1; 5753 status = os::Solaris::mutex_unlock(_mutex); 5754 assert(status == 0, "invariant"); 5755 5756 if (s < 1) { 5757 status = os::Solaris::cond_signal(_cond); 5758 assert(status == 0, "invariant"); 5759 } 5760} 5761 5762extern char** environ; 5763 5764// Run the specified command in a separate process. Return its exit value, 5765// or -1 on failure (e.g. can't fork a new process). 5766// Unlike system(), this function can be called from signal handler. It 5767// doesn't block SIGINT et al. 5768int os::fork_and_exec(char* cmd) { 5769 char * argv[4]; 5770 argv[0] = (char *)"sh"; 5771 argv[1] = (char *)"-c"; 5772 argv[2] = cmd; 5773 argv[3] = NULL; 5774 5775 // fork is async-safe, fork1 is not so can't use in signal handler 5776 pid_t pid; 5777 Thread* t = ThreadLocalStorage::get_thread_slow(); 5778 if (t != NULL && t->is_inside_signal_handler()) { 5779 pid = fork(); 5780 } else { 5781 pid = fork1(); 5782 } 5783 5784 if (pid < 0) { 5785 // fork failed 5786 warning("fork failed: %s", strerror(errno)); 5787 return -1; 5788 5789 } else if (pid == 0) { 5790 // child process 5791 5792 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5793 execve("/usr/bin/sh", argv, environ); 5794 5795 // execve failed 5796 _exit(-1); 5797 5798 } else { 5799 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5800 // care about the actual exit code, for now. 5801 5802 int status; 5803 5804 // Wait for the child process to exit. This returns immediately if 5805 // the child has already exited. */ 5806 while (waitpid(pid, &status, 0) < 0) { 5807 switch (errno) { 5808 case ECHILD: return 0; 5809 case EINTR: break; 5810 default: return -1; 5811 } 5812 } 5813 5814 if (WIFEXITED(status)) { 5815 // The child exited normally; get its exit code. 5816 return WEXITSTATUS(status); 5817 } else if (WIFSIGNALED(status)) { 5818 // The child exited because of a signal 5819 // The best value to return is 0x80 + signal number, 5820 // because that is what all Unix shells do, and because 5821 // it allows callers to distinguish between process exit and 5822 // process death by signal. 5823 return 0x80 + WTERMSIG(status); 5824 } else { 5825 // Unknown exit code; pass it through 5826 return status; 5827 } 5828 } 5829} 5830 5831// is_headless_jre() 5832// 5833// Test for the existence of xawt/libmawt.so or libawt_xawt.so 5834// in order to report if we are running in a headless jre 5835// 5836// Since JDK8 xawt/libmawt.so was moved into the same directory 5837// as libawt.so, and renamed libawt_xawt.so 5838// 5839bool os::is_headless_jre() { 5840 struct stat statbuf; 5841 char buf[MAXPATHLEN]; 5842 char libmawtpath[MAXPATHLEN]; 5843 const char *xawtstr = "/xawt/libmawt.so"; 5844 const char *new_xawtstr = "/libawt_xawt.so"; 5845 char *p; 5846 5847 // Get path to libjvm.so 5848 os::jvm_path(buf, sizeof(buf)); 5849 5850 // Get rid of libjvm.so 5851 p = strrchr(buf, '/'); 5852 if (p == NULL) return false; 5853 else *p = '\0'; 5854 5855 // Get rid of client or server 5856 p = strrchr(buf, '/'); 5857 if (p == NULL) return false; 5858 else *p = '\0'; 5859 5860 // check xawt/libmawt.so 5861 strcpy(libmawtpath, buf); 5862 strcat(libmawtpath, xawtstr); 5863 if (::stat(libmawtpath, &statbuf) == 0) return false; 5864 5865 // check libawt_xawt.so 5866 strcpy(libmawtpath, buf); 5867 strcat(libmawtpath, new_xawtstr); 5868 if (::stat(libmawtpath, &statbuf) == 0) return false; 5869 5870 return true; 5871} 5872 5873size_t os::write(int fd, const void *buf, unsigned int nBytes) { 5874 size_t res; 5875 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5876 "Assumed _thread_in_native"); 5877 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 5878 return res; 5879} 5880 5881int os::close(int fd) { 5882 return ::close(fd); 5883} 5884 5885int os::socket_close(int fd) { 5886 return ::close(fd); 5887} 5888 5889int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 5890 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5891 "Assumed _thread_in_native"); 5892 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags)); 5893} 5894 5895int os::send(int fd, char* buf, size_t nBytes, uint flags) { 5896 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5897 "Assumed _thread_in_native"); 5898 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5899} 5900 5901int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 5902 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5903} 5904 5905// As both poll and select can be interrupted by signals, we have to be 5906// prepared to restart the system call after updating the timeout, unless 5907// a poll() is done with timeout == -1, in which case we repeat with this 5908// "wait forever" value. 5909 5910int os::timeout(int fd, long timeout) { 5911 int res; 5912 struct timeval t; 5913 julong prevtime, newtime; 5914 static const char* aNull = 0; 5915 struct pollfd pfd; 5916 pfd.fd = fd; 5917 pfd.events = POLLIN; 5918 5919 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5920 "Assumed _thread_in_native"); 5921 5922 gettimeofday(&t, &aNull); 5923 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 5924 5925 for (;;) { 5926 res = ::poll(&pfd, 1, timeout); 5927 if (res == OS_ERR && errno == EINTR) { 5928 if (timeout != -1) { 5929 gettimeofday(&t, &aNull); 5930 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000; 5931 timeout -= newtime - prevtime; 5932 if (timeout <= 0) 5933 return OS_OK; 5934 prevtime = newtime; 5935 } 5936 } else return res; 5937 } 5938} 5939 5940int os::connect(int fd, struct sockaddr *him, socklen_t len) { 5941 int _result; 5942 _result = ::connect(fd, him, len); 5943 5944 // On Solaris, when a connect() call is interrupted, the connection 5945 // can be established asynchronously (see 6343810). Subsequent calls 5946 // to connect() must check the errno value which has the semantic 5947 // described below (copied from the connect() man page). Handling 5948 // of asynchronously established connections is required for both 5949 // blocking and non-blocking sockets. 5950 // EINTR The connection attempt was interrupted 5951 // before any data arrived by the delivery of 5952 // a signal. The connection, however, will be 5953 // established asynchronously. 5954 // 5955 // EINPROGRESS The socket is non-blocking, and the connec- 5956 // tion cannot be completed immediately. 5957 // 5958 // EALREADY The socket is non-blocking, and a previous 5959 // connection attempt has not yet been com- 5960 // pleted. 5961 // 5962 // EISCONN The socket is already connected. 5963 if (_result == OS_ERR && errno == EINTR) { 5964 /* restarting a connect() changes its errno semantics */ 5965 RESTARTABLE(::connect(fd, him, len), _result); 5966 /* undo these changes */ 5967 if (_result == OS_ERR) { 5968 if (errno == EALREADY) { 5969 errno = EINPROGRESS; /* fall through */ 5970 } else if (errno == EISCONN) { 5971 errno = 0; 5972 return OS_OK; 5973 } 5974 } 5975 } 5976 return _result; 5977 } 5978 5979int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 5980 if (fd < 0) { 5981 return OS_ERR; 5982 } 5983 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5984 "Assumed _thread_in_native"); 5985 RESTARTABLE_RETURN_INT((int)::accept(fd, him, len)); 5986} 5987 5988int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 5989 sockaddr* from, socklen_t* fromlen) { 5990 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5991 "Assumed _thread_in_native"); 5992 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen)); 5993} 5994 5995int os::sendto(int fd, char* buf, size_t len, uint flags, 5996 struct sockaddr* to, socklen_t tolen) { 5997 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5998 "Assumed _thread_in_native"); 5999 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen)); 6000} 6001 6002int os::socket_available(int fd, jint *pbytes) { 6003 if (fd < 0) { 6004 return OS_OK; 6005 } 6006 int ret; 6007 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); 6008 // note: ioctl can return 0 when successful, JVM_SocketAvailable 6009 // is expected to return 0 on failure and 1 on success to the jdk. 6010 return (ret == OS_ERR) ? 0 : 1; 6011} 6012 6013int os::bind(int fd, struct sockaddr* him, socklen_t len) { 6014 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 6015 "Assumed _thread_in_native"); 6016 return ::bind(fd, him, len); 6017} 6018 6019// Get the default path to the core file 6020// Returns the length of the string 6021int os::get_core_path(char* buffer, size_t bufferSize) { 6022 const char* p = get_current_directory(buffer, bufferSize); 6023 6024 if (p == NULL) { 6025 assert(p != NULL, "failed to get current directory"); 6026 return 0; 6027 } 6028 6029 return strlen(buffer); 6030} 6031 6032#ifndef PRODUCT 6033void TestReserveMemorySpecial_test() { 6034 // No tests available for this platform 6035} 6036#endif 6037