os_solaris.cpp revision 10632:37c777f2cc9c
12382Spaul/* 22382Spaul * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 32382Spaul * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 42382Spaul * 52382Spaul * This code is free software; you can redistribute it and/or modify it 62382Spaul * under the terms of the GNU General Public License version 2 only, as 72382Spaul * published by the Free Software Foundation. 82382Spaul * 92382Spaul * This code is distributed in the hope that it will be useful, but WITHOUT 102382Spaul * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 112382Spaul * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 122382Spaul * version 2 for more details (a copy is included in the LICENSE file that 132382Spaul * accompanied this code). 142382Spaul * 152382Spaul * You should have received a copy of the GNU General Public License version 162382Spaul * 2 along with this work; if not, write to the Free Software Foundation, 172382Spaul * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 182382Spaul * 192382Spaul * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 202382Spaul * or visit www.oracle.com if you need additional information or have any 212382Spaul * questions. 222382Spaul * 232382Spaul */ 242382Spaul 252382Spaul// no precompiled headers 262382Spaul#include "classfile/classLoader.hpp" 272382Spaul#include "classfile/systemDictionary.hpp" 282382Spaul#include "classfile/vmSymbols.hpp" 292382Spaul#include "code/icBuffer.hpp" 302382Spaul#include "code/vtableStubs.hpp" 312382Spaul#include "compiler/compileBroker.hpp" 322382Spaul#include "compiler/disassembler.hpp" 332382Spaul#include "interpreter/interpreter.hpp" 342382Spaul#include "jvm_solaris.h" 352382Spaul#include "logging/log.hpp" 362382Spaul#include "memory/allocation.inline.hpp" 372382Spaul#include "memory/filemap.hpp" 382382Spaul#include "mutex_solaris.inline.hpp" 392382Spaul#include "oops/oop.inline.hpp" 402382Spaul#include "os_share_solaris.hpp" 412382Spaul#include "os_solaris.inline.hpp" 4259366Ssteve#include "prims/jniFastGetField.hpp" 4359366Ssteve#include "prims/jvm.h" 442382Spaul#include "prims/jvm_misc.hpp" 452382Spaul#include "runtime/arguments.hpp" 462382Spaul#include "runtime/atomic.inline.hpp" 472382Spaul#include "runtime/extendedPC.hpp" 482382Spaul#include "runtime/globals.hpp" 492382Spaul#include "runtime/interfaceSupport.hpp" 502382Spaul#include "runtime/java.hpp" 512382Spaul#include "runtime/javaCalls.hpp" 522382Spaul#include "runtime/mutexLocker.hpp" 532382Spaul#include "runtime/objectMonitor.hpp" 542382Spaul#include "runtime/orderAccess.inline.hpp" 552382Spaul#include "runtime/osThread.hpp" 562382Spaul#include "runtime/perfMemory.hpp" 572382Spaul#include "runtime/sharedRuntime.hpp" 582382Spaul#include "runtime/statSampler.hpp" 592382Spaul#include "runtime/stubRoutines.hpp" 602382Spaul#include "runtime/thread.inline.hpp" 612382Spaul#include "runtime/threadCritical.hpp" 622382Spaul#include "runtime/timer.hpp" 632382Spaul#include "runtime/vm_version.hpp" 642382Spaul#include "semaphore_posix.hpp" 652382Spaul#include "services/attachListener.hpp" 662382Spaul#include "services/memTracker.hpp" 672382Spaul#include "services/runtimeService.hpp" 682382Spaul#include "utilities/decoder.hpp" 692382Spaul#include "utilities/defaultStream.hpp" 702382Spaul#include "utilities/events.hpp" 712382Spaul#include "utilities/growableArray.hpp" 722382Spaul#include "utilities/macros.hpp" 732382Spaul#include "utilities/vmError.hpp" 742382Spaul 752382Spaul// put OS-includes here 762382Spaul# include <dlfcn.h> 772382Spaul# include <errno.h> 782382Spaul# include <exception> 792382Spaul# include <link.h> 802382Spaul# include <poll.h> 812382Spaul# include <pthread.h> 822382Spaul# include <pwd.h> 832382Spaul# include <schedctl.h> 842382Spaul# include <setjmp.h> 852382Spaul# include <signal.h> 862382Spaul# include <stdio.h> 872382Spaul# include <alloca.h> 882382Spaul# include <sys/filio.h> 892382Spaul# include <sys/ipc.h> 902382Spaul# include <sys/lwp.h> 912382Spaul# include <sys/machelf.h> // for elf Sym structure used by dladdr1 922382Spaul# include <sys/mman.h> 932382Spaul# include <sys/processor.h> 942382Spaul# include <sys/procset.h> 952382Spaul# include <sys/pset.h> 962382Spaul# include <sys/resource.h> 972382Spaul# include <sys/shm.h> 982382Spaul# include <sys/socket.h> 992382Spaul# include <sys/stat.h> 10024859Sjkh# include <sys/systeminfo.h> 1012382Spaul# include <sys/time.h> 1022382Spaul# include <sys/times.h> 1032382Spaul# include <sys/types.h> 1042382Spaul# include <sys/wait.h> 1052382Spaul# include <sys/utsname.h> 1062382Spaul# include <thread.h> 1072382Spaul# include <unistd.h> 1082382Spaul# include <sys/priocntl.h> 1092382Spaul# include <sys/rtpriocntl.h> 1102382Spaul# include <sys/tspriocntl.h> 1112382Spaul# include <sys/iapriocntl.h> 1122382Spaul# include <sys/fxpriocntl.h> 1132382Spaul# include <sys/loadavg.h> 1142382Spaul# include <string.h> 1152382Spaul# include <stdio.h> 1162382Spaul 1172382Spaul# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 1182382Spaul# include <sys/procfs.h> // see comment in <sys/procfs.h> 1192382Spaul 1202382Spaul#define MAX_PATH (2 * K) 1212382Spaul 1222382Spaul// for timer info max values which include all bits 1232382Spaul#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 1242382Spaul 1252382Spaul 1262382Spaul// Here are some liblgrp types from sys/lgrp_user.h to be able to 1272382Spaul// compile on older systems without this header file. 1282382Spaul 1292382Spaul#ifndef MADV_ACCESS_LWP 1302382Spaul #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 1312382Spaul#endif 13259366Ssteve#ifndef MADV_ACCESS_MANY 1332382Spaul #define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 1342382Spaul#endif 1352382Spaul 1362382Spaul#ifndef LGRP_RSRC_CPU 1372382Spaul #define LGRP_RSRC_CPU 0 /* CPU resources */ 1382382Spaul#endif 1392382Spaul#ifndef LGRP_RSRC_MEM 1402382Spaul #define LGRP_RSRC_MEM 1 /* memory resources */ 1412382Spaul#endif 1422382Spaul 1432382Spaul// Values for ThreadPriorityPolicy == 1 1442382Spaulint prio_policy1[CriticalPriority+1] = { 1452382Spaul -99999, 0, 16, 32, 48, 64, 1462382Spaul 80, 96, 112, 124, 127, 127 }; 1472382Spaul 1482382Spaul// System parameters used internally 1492382Spaulstatic clock_t clock_tics_per_sec = 100; 1502382Spaul 1512382Spaul// Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 1522382Spaulstatic bool enabled_extended_FILE_stdio = false; 1532382Spaul 1542382Spaul// For diagnostics to print a message once. see run_periodic_checks 1552382Spaulstatic bool check_addr0_done = false; 1562382Spaulstatic sigset_t check_signal_done; 1572382Spaulstatic bool check_signals = true; 1582382Spaul 1592382Spauladdress os::Solaris::handler_start; // start pc of thr_sighndlrinfo 1602382Spauladdress os::Solaris::handler_end; // end pc of thr_sighndlrinfo 1612382Spaul 1622382Spauladdress os::Solaris::_main_stack_base = NULL; // 4352906 workaround 1632382Spaul 1642382Spaul 1652382Spaul// "default" initializers for missing libc APIs 1662382Spaulextern "C" { 1672382Spaul static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 1682382Spaul static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 1692382Spaul 1702382Spaul static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 1712382Spaul static int lwp_cond_destroy(cond_t *cv) { return 0; } 1722382Spaul} 1732382Spaul 1742382Spaul// "default" initializers for pthread-based synchronization 1752382Spaulextern "C" { 1762382Spaul static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 1772382Spaul static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 1782382Spaul} 1792382Spaul 1802382Spaulstatic void unpackTime(timespec* absTime, bool isAbsolute, jlong time); 1812382Spaul 1822382Spaulstatic inline size_t adjust_stack_size(address base, size_t size) { 1832382Spaul if ((ssize_t)size < 0) { 1842382Spaul // 4759953: Compensate for ridiculous stack size. 1852382Spaul size = max_intx; 1862382Spaul } 1872382Spaul if (size > (size_t)base) { 1882382Spaul // 4812466: Make sure size doesn't allow the stack to wrap the address space. 1892382Spaul size = (size_t)base; 1902382Spaul } 1912382Spaul return size; 1922382Spaul} 1932382Spaul 1942382Spaulstatic inline stack_t get_stack_info() { 1952382Spaul stack_t st; 1962382Spaul int retval = thr_stksegment(&st); 1972382Spaul st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 1982382Spaul assert(retval == 0, "incorrect return value from thr_stksegment"); 1992382Spaul assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 2002382Spaul assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 2012382Spaul return st; 2022382Spaul} 2032382Spaul 2042382Spauladdress os::current_stack_base() { 2052382Spaul int r = thr_main(); 2062382Spaul guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 2072382Spaul bool is_primordial_thread = r; 2082382Spaul 2092382Spaul // Workaround 4352906, avoid calls to thr_stksegment by 2102382Spaul // thr_main after the first one (it looks like we trash 2112382Spaul // some data, causing the value for ss_sp to be incorrect). 2122382Spaul if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 2132382Spaul stack_t st = get_stack_info(); 2142382Spaul if (is_primordial_thread) { 2152382Spaul // cache initial value of stack base 2162382Spaul os::Solaris::_main_stack_base = (address)st.ss_sp; 2172382Spaul } 2182382Spaul return (address)st.ss_sp; 2192382Spaul } else { 2202382Spaul guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 2212382Spaul return os::Solaris::_main_stack_base; 2222382Spaul } 2232382Spaul} 2242382Spaul 2252382Spaulsize_t os::current_stack_size() { 2262382Spaul size_t size; 2272382Spaul 2282382Spaul int r = thr_main(); 2292382Spaul guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 2302382Spaul if (!r) { 2312382Spaul size = get_stack_info().ss_size; 2322382Spaul } else { 2332382Spaul struct rlimit limits; 2342382Spaul getrlimit(RLIMIT_STACK, &limits); 2352382Spaul size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 2362382Spaul } 2372382Spaul // base may not be page aligned 2382382Spaul address base = current_stack_base(); 2392382Spaul address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 2402382Spaul return (size_t)(base - bottom); 2412382Spaul} 2422382Spaul 2432382Spaulstruct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 2442382Spaul return localtime_r(clock, res); 2452382Spaul} 2462382Spaul 2472382Spaulvoid os::Solaris::try_enable_extended_io() { 2482382Spaul typedef int (*enable_extended_FILE_stdio_t)(int, int); 2492382Spaul 2502382Spaul if (!UseExtendedFileIO) { 2512382Spaul return; 2522382Spaul } 2532382Spaul 2542382Spaul enable_extended_FILE_stdio_t enabler = 2552382Spaul (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 2562382Spaul "enable_extended_FILE_stdio"); 2572382Spaul if (enabler) { 2582382Spaul enabler(-1, -1); 2592382Spaul } 2602382Spaul} 2612382Spaul 2622382Spaulstatic int _processors_online = 0; 2632382Spaul 2642382Spauljint os::Solaris::_os_thread_limit = 0; 2652382Spaulvolatile jint os::Solaris::_os_thread_count = 0; 2662382Spaul 2672382Spauljulong os::available_memory() { 2682382Spaul return Solaris::available_memory(); 2692382Spaul} 2702382Spaul 2712382Spauljulong os::Solaris::available_memory() { 2722382Spaul return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 2732382Spaul} 2742382Spaul 2752382Spauljulong os::Solaris::_physical_memory = 0; 2762382Spaul 2772382Spauljulong os::physical_memory() { 2782382Spaul return Solaris::physical_memory(); 2792382Spaul} 2802382Spaul 2812382Spaulstatic hrtime_t first_hrtime = 0; 2822382Spaulstatic const hrtime_t hrtime_hz = 1000*1000*1000; 2832382Spaulstatic volatile hrtime_t max_hrtime = 0; 2842382Spaul 2852382Spaul 2862382Spaulvoid os::Solaris::initialize_system_info() { 2872382Spaul set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 2882382Spaul _processors_online = sysconf(_SC_NPROCESSORS_ONLN); 2892382Spaul _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * 2902382Spaul (julong)sysconf(_SC_PAGESIZE); 2912382Spaul} 2922382Spaul 2932382Spaulint os::active_processor_count() { 2942382Spaul int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 2952382Spaul pid_t pid = getpid(); 2962382Spaul psetid_t pset = PS_NONE; 2972382Spaul // Are we running in a processor set or is there any processor set around? 2982382Spaul if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 2992382Spaul uint_t pset_cpus; 3002382Spaul // Query the number of cpus available to us. 3012382Spaul if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 3022382Spaul assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 3032382Spaul _processors_online = pset_cpus; 3042382Spaul return pset_cpus; 3052382Spaul } 3062382Spaul } 3072382Spaul // Otherwise return number of online cpus 3082382Spaul return online_cpus; 3092382Spaul} 3102382Spaul 3112382Spaulstatic bool find_processors_in_pset(psetid_t pset, 3122382Spaul processorid_t** id_array, 3132382Spaul uint_t* id_length) { 3142382Spaul bool result = false; 3152382Spaul // Find the number of processors in the processor set. 3162382Spaul if (pset_info(pset, NULL, id_length, NULL) == 0) { 3172382Spaul // Make up an array to hold their ids. 3182382Spaul *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 3192382Spaul // Fill in the array with their processor ids. 3202382Spaul if (pset_info(pset, NULL, id_length, *id_array) == 0) { 3212382Spaul result = true; 3222382Spaul } 3232382Spaul } 3242382Spaul return result; 3252382Spaul} 3262382Spaul 3272382Spaul// Callers of find_processors_online() must tolerate imprecise results -- 3282382Spaul// the system configuration can change asynchronously because of DR 3292382Spaul// or explicit psradm operations. 3302382Spaul// 3312382Spaul// We also need to take care that the loop (below) terminates as the 3322382Spaul// number of processors online can change between the _SC_NPROCESSORS_ONLN 3332382Spaul// request and the loop that builds the list of processor ids. Unfortunately 3342382Spaul// there's no reliable way to determine the maximum valid processor id, 3352382Spaul// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 3362382Spaul// man pages, which claim the processor id set is "sparse, but 3372382Spaul// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 3382382Spaul// exit the loop. 3392382Spaul// 3402382Spaul// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 3412382Spaul// not available on S8.0. 3422382Spaul 3432382Spaulstatic bool find_processors_online(processorid_t** id_array, 3442382Spaul uint* id_length) { 3452382Spaul const processorid_t MAX_PROCESSOR_ID = 100000; 3462382Spaul // Find the number of processors online. 3472382Spaul *id_length = sysconf(_SC_NPROCESSORS_ONLN); 3482382Spaul // Make up an array to hold their ids. 3492382Spaul *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 3502382Spaul // Processors need not be numbered consecutively. 3512382Spaul long found = 0; 3522382Spaul processorid_t next = 0; 3532382Spaul while (found < *id_length && next < MAX_PROCESSOR_ID) { 3542382Spaul processor_info_t info; 3552382Spaul if (processor_info(next, &info) == 0) { 3562382Spaul // NB, PI_NOINTR processors are effectively online ... 3572382Spaul if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 3582382Spaul (*id_array)[found] = next; 3592382Spaul found += 1; 3602382Spaul } 3612382Spaul } 3622382Spaul next += 1; 3632382Spaul } 3642382Spaul if (found < *id_length) { 3652382Spaul // The loop above didn't identify the expected number of processors. 3662382Spaul // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 3672382Spaul // and re-running the loop, above, but there's no guarantee of progress 3682382Spaul // if the system configuration is in flux. Instead, we just return what 3692382Spaul // we've got. Note that in the worst case find_processors_online() could 3702382Spaul // return an empty set. (As a fall-back in the case of the empty set we 3712382Spaul // could just return the ID of the current processor). 3722382Spaul *id_length = found; 3732382Spaul } 3742382Spaul 3752382Spaul return true; 3762382Spaul} 3772382Spaul 3782382Spaulstatic bool assign_distribution(processorid_t* id_array, 3792382Spaul uint id_length, 3802382Spaul uint* distribution, 3812382Spaul uint distribution_length) { 3822382Spaul // We assume we can assign processorid_t's to uint's. 3832382Spaul assert(sizeof(processorid_t) == sizeof(uint), 3842382Spaul "can't convert processorid_t to uint"); 3852382Spaul // Quick check to see if we won't succeed. 3862382Spaul if (id_length < distribution_length) { 3872382Spaul return false; 3882382Spaul } 3892382Spaul // Assign processor ids to the distribution. 3902382Spaul // Try to shuffle processors to distribute work across boards, 3912382Spaul // assuming 4 processors per board. 3922382Spaul const uint processors_per_board = ProcessDistributionStride; 3932382Spaul // Find the maximum processor id. 3942382Spaul processorid_t max_id = 0; 3952382Spaul for (uint m = 0; m < id_length; m += 1) { 3962382Spaul max_id = MAX2(max_id, id_array[m]); 3972382Spaul } 3982382Spaul // The next id, to limit loops. 3992382Spaul const processorid_t limit_id = max_id + 1; 4002382Spaul // Make up markers for available processors. 4012382Spaul bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 4022382Spaul for (uint c = 0; c < limit_id; c += 1) { 4032382Spaul available_id[c] = false; 4042382Spaul } 4052382Spaul for (uint a = 0; a < id_length; a += 1) { 4062382Spaul available_id[id_array[a]] = true; 4072382Spaul } 4082382Spaul // Step by "boards", then by "slot", copying to "assigned". 4092382Spaul // NEEDS_CLEANUP: The assignment of processors should be stateful, 4102382Spaul // remembering which processors have been assigned by 4112382Spaul // previous calls, etc., so as to distribute several 4122382Spaul // independent calls of this method. What we'd like is 4132382Spaul // It would be nice to have an API that let us ask 4142382Spaul // how many processes are bound to a processor, 4152382Spaul // but we don't have that, either. 4162382Spaul // In the short term, "board" is static so that 4172382Spaul // subsequent distributions don't all start at board 0. 4182382Spaul static uint board = 0; 4192382Spaul uint assigned = 0; 4202382Spaul // Until we've found enough processors .... 4212382Spaul while (assigned < distribution_length) { 4222382Spaul // ... find the next available processor in the board. 4232382Spaul for (uint slot = 0; slot < processors_per_board; slot += 1) { 4242382Spaul uint try_id = board * processors_per_board + slot; 4252382Spaul if ((try_id < limit_id) && (available_id[try_id] == true)) { 4262382Spaul distribution[assigned] = try_id; 4272382Spaul available_id[try_id] = false; 4282382Spaul assigned += 1; 4292382Spaul break; 4302382Spaul } 4312382Spaul } 4322382Spaul board += 1; 4332382Spaul if (board * processors_per_board + 0 >= limit_id) { 4342382Spaul board = 0; 4352382Spaul } 4362382Spaul } 4372382Spaul if (available_id != NULL) { 4382382Spaul FREE_C_HEAP_ARRAY(bool, available_id); 4392382Spaul } 4402382Spaul return true; 4412382Spaul} 4422382Spaul 4432382Spaulvoid os::set_native_thread_name(const char *name) { 4442382Spaul // Not yet implemented. 4452382Spaul return; 4462382Spaul} 4472382Spaul 4482382Spaulbool os::distribute_processes(uint length, uint* distribution) { 4492382Spaul bool result = false; 4502382Spaul // Find the processor id's of all the available CPUs. 4512382Spaul processorid_t* id_array = NULL; 4522382Spaul uint id_length = 0; 4532382Spaul // There are some races between querying information and using it, 4542382Spaul // since processor sets can change dynamically. 4552382Spaul psetid_t pset = PS_NONE; 4562382Spaul // Are we running in a processor set? 4572382Spaul if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 4582382Spaul result = find_processors_in_pset(pset, &id_array, &id_length); 4592382Spaul } else { 4602382Spaul result = find_processors_online(&id_array, &id_length); 4612382Spaul } 4622382Spaul if (result == true) { 4632382Spaul if (id_length >= length) { 4642382Spaul result = assign_distribution(id_array, id_length, distribution, length); 4652382Spaul } else { 4662382Spaul result = false; 4672382Spaul } 4682382Spaul } 4692382Spaul if (id_array != NULL) { 4702382Spaul FREE_C_HEAP_ARRAY(processorid_t, id_array); 4712382Spaul } 4722382Spaul return result; 4732382Spaul} 4742382Spaul 4752382Spaulbool os::bind_to_processor(uint processor_id) { 4762382Spaul // We assume that a processorid_t can be stored in a uint. 4772382Spaul assert(sizeof(uint) == sizeof(processorid_t), 4782382Spaul "can't convert uint to processorid_t"); 4792382Spaul int bind_result = 4802382Spaul processor_bind(P_LWPID, // bind LWP. 4812382Spaul P_MYID, // bind current LWP. 4822382Spaul (processorid_t) processor_id, // id. 4832382Spaul NULL); // don't return old binding. 4842382Spaul return (bind_result == 0); 4852382Spaul} 4862382Spaul 4872382Spaul// Return true if user is running as root. 4882382Spaul 4892382Spaulbool os::have_special_privileges() { 4902382Spaul static bool init = false; 4912382Spaul static bool privileges = false; 4922382Spaul if (!init) { 4932382Spaul privileges = (getuid() != geteuid()) || (getgid() != getegid()); 4942382Spaul init = true; 4952382Spaul } 4962382Spaul return privileges; 4972382Spaul} 4982382Spaul 4992382Spaul 5002382Spaulvoid os::init_system_properties_values() { 5012382Spaul // The next steps are taken in the product version: 5022382Spaul // 5032382Spaul // Obtain the JAVA_HOME value from the location of libjvm.so. 5042382Spaul // This library should be located at: 5052382Spaul // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 5062382Spaul // 5072382Spaul // If "/jre/lib/" appears at the right place in the path, then we 5082382Spaul // assume libjvm.so is installed in a JDK and we use this path. 5092382Spaul // 5102382Spaul // Otherwise exit with message: "Could not create the Java virtual machine." 5112382Spaul // 5122382Spaul // The following extra steps are taken in the debugging version: 5132382Spaul // 5142382Spaul // If "/jre/lib/" does NOT appear at the right place in the path 5152382Spaul // instead of exit check for $JAVA_HOME environment variable. 5162382Spaul // 5172382Spaul // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 5182382Spaul // then we append a fake suffix "hotspot/libjvm.so" to this path so 5192382Spaul // it looks like libjvm.so is installed there 5202382Spaul // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 5212382Spaul // 5222382Spaul // Otherwise exit. 5232382Spaul // 5242382Spaul // Important note: if the location of libjvm.so changes this 5252382Spaul // code needs to be changed accordingly. 5262382Spaul 5272382Spaul// Base path of extensions installed on the system. 5282382Spaul#define SYS_EXT_DIR "/usr/jdk/packages" 5292382Spaul#define EXTENSIONS_DIR "/lib/ext" 5302382Spaul 5312382Spaul char cpu_arch[12]; 5322382Spaul // Buffer that fits several sprintfs. 5332382Spaul // Note that the space for the colon and the trailing null are provided 5342382Spaul // by the nulls included by the sizeof operator. 5352382Spaul const size_t bufsize = 5362382Spaul MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. 5372382Spaul sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path 5382382Spaul (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir 5392382Spaul char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); 5402382Spaul 5412382Spaul // sysclasspath, java_home, dll_dir 5422382Spaul { 5432382Spaul char *pslash; 5442382Spaul os::jvm_path(buf, bufsize); 5452382Spaul 5462382Spaul // Found the full path to libjvm.so. 5472382Spaul // Now cut the path to <java_home>/jre if we can. 5482382Spaul *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. 5492382Spaul pslash = strrchr(buf, '/'); 5502382Spaul if (pslash != NULL) { 5512382Spaul *pslash = '\0'; // Get rid of /{client|server|hotspot}. 5522382Spaul } 5532382Spaul Arguments::set_dll_dir(buf); 5542382Spaul 5552382Spaul if (pslash != NULL) { 5562382Spaul pslash = strrchr(buf, '/'); 5572382Spaul if (pslash != NULL) { 5582382Spaul *pslash = '\0'; // Get rid of /<arch>. 5592382Spaul pslash = strrchr(buf, '/'); 5602382Spaul if (pslash != NULL) { 5612382Spaul *pslash = '\0'; // Get rid of /lib. 5622382Spaul } 5632382Spaul } 5642382Spaul } 5652382Spaul Arguments::set_java_home(buf); 5662382Spaul set_boot_path('/', ':'); 5672382Spaul } 5682382Spaul 5692382Spaul // Where to look for native libraries. 5702382Spaul { 5712382Spaul // Use dlinfo() to determine the correct java.library.path. 5722382Spaul // 5732382Spaul // If we're launched by the Java launcher, and the user 5742382Spaul // does not set java.library.path explicitly on the commandline, 5752382Spaul // the Java launcher sets LD_LIBRARY_PATH for us and unsets 5762382Spaul // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 5772382Spaul // dlinfo returns LD_LIBRARY_PATH + crle settings (including 5782382Spaul // /usr/lib), which is exactly what we want. 5792382Spaul // 5802382Spaul // If the user does set java.library.path, it completely 5812382Spaul // overwrites this setting, and always has. 5822382Spaul // 5832382Spaul // If we're not launched by the Java launcher, we may 5842382Spaul // get here with any/all of the LD_LIBRARY_PATH[_32|64] 5852382Spaul // settings. Again, dlinfo does exactly what we want. 5862382Spaul 5872382Spaul Dl_serinfo info_sz, *info = &info_sz; 5882382Spaul Dl_serpath *path; 5892382Spaul char *library_path; 5902382Spaul char *common_path = buf; 5912382Spaul 5922382Spaul // Determine search path count and required buffer size. 5932382Spaul if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 5942382Spaul FREE_C_HEAP_ARRAY(char, buf); 5952382Spaul vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 5962382Spaul } 5972382Spaul 5982382Spaul // Allocate new buffer and initialize. 5992382Spaul info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal); 6002382Spaul info->dls_size = info_sz.dls_size; 6012382Spaul info->dls_cnt = info_sz.dls_cnt; 6022382Spaul 6032382Spaul // Obtain search path information. 6042382Spaul if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 6052382Spaul FREE_C_HEAP_ARRAY(char, buf); 6062382Spaul FREE_C_HEAP_ARRAY(char, info); 6072382Spaul vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 6082382Spaul } 6092382Spaul 6102382Spaul path = &info->dls_serpath[0]; 6112382Spaul 6122382Spaul // Note: Due to a legacy implementation, most of the library path 6132382Spaul // is set in the launcher. This was to accomodate linking restrictions 6142382Spaul // on legacy Solaris implementations (which are no longer supported). 6152382Spaul // Eventually, all the library path setting will be done here. 6162382Spaul // 6172382Spaul // However, to prevent the proliferation of improperly built native 6182382Spaul // libraries, the new path component /usr/jdk/packages is added here. 6192382Spaul 6202382Spaul // Determine the actual CPU architecture. 6212382Spaul sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 6222382Spaul#ifdef _LP64 6232382Spaul // If we are a 64-bit vm, perform the following translations: 6242382Spaul // sparc -> sparcv9 6252382Spaul // i386 -> amd64 6262382Spaul if (strcmp(cpu_arch, "sparc") == 0) { 6272382Spaul strcat(cpu_arch, "v9"); 6282382Spaul } else if (strcmp(cpu_arch, "i386") == 0) { 6292382Spaul strcpy(cpu_arch, "amd64"); 6302382Spaul } 6312382Spaul#endif 6322382Spaul 6332382Spaul // Construct the invariant part of ld_library_path. 6342382Spaul sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch); 6352382Spaul 6362382Spaul // Struct size is more than sufficient for the path components obtained 6372382Spaul // through the dlinfo() call, so only add additional space for the path 6382382Spaul // components explicitly added here. 6392382Spaul size_t library_path_size = info->dls_size + strlen(common_path); 6402382Spaul library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal); 6412382Spaul library_path[0] = '\0'; 6422382Spaul 6432382Spaul // Construct the desired Java library path from the linker's library 6442382Spaul // search path. 6452382Spaul // 6462382Spaul // For compatibility, it is optimal that we insert the additional path 6472382Spaul // components specific to the Java VM after those components specified 6482382Spaul // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 6492382Spaul // infrastructure. 6502382Spaul if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it. 6512382Spaul strcpy(library_path, common_path); 6522382Spaul } else { 6532382Spaul int inserted = 0; 6542382Spaul int i; 6552382Spaul for (i = 0; i < info->dls_cnt; i++, path++) { 6562382Spaul uint_t flags = path->dls_flags & LA_SER_MASK; 6572382Spaul if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 6582382Spaul strcat(library_path, common_path); 6592382Spaul strcat(library_path, os::path_separator()); 6602382Spaul inserted = 1; 6612382Spaul } 6622382Spaul strcat(library_path, path->dls_name); 6632382Spaul strcat(library_path, os::path_separator()); 6642382Spaul } 6652382Spaul // Eliminate trailing path separator. 6662382Spaul library_path[strlen(library_path)-1] = '\0'; 6672382Spaul } 6682382Spaul 6692382Spaul // happens before argument parsing - can't use a trace flag 6702382Spaul // tty->print_raw("init_system_properties_values: native lib path: "); 6712382Spaul // tty->print_raw_cr(library_path); 6722382Spaul 6732382Spaul // Callee copies into its own buffer. 6742382Spaul Arguments::set_library_path(library_path); 6752382Spaul 6762382Spaul FREE_C_HEAP_ARRAY(char, library_path); 6772382Spaul FREE_C_HEAP_ARRAY(char, info); 6782382Spaul } 6792382Spaul 6802382Spaul // Extensions directories. 6812382Spaul sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); 6822382Spaul Arguments::set_ext_dirs(buf); 6832382Spaul 6842382Spaul FREE_C_HEAP_ARRAY(char, buf); 6852382Spaul 6862382Spaul#undef SYS_EXT_DIR 6872382Spaul#undef EXTENSIONS_DIR 6882382Spaul} 6892382Spaul 6902382Spaulvoid os::breakpoint() { 6912382Spaul BREAKPOINT; 6922382Spaul} 6932382Spaul 6942382Spaulbool os::obsolete_option(const JavaVMOption *option) { 6952382Spaul if (!strncmp(option->optionString, "-Xt", 3)) { 6962382Spaul return true; 6972382Spaul } else if (!strncmp(option->optionString, "-Xtm", 4)) { 6982382Spaul return true; 6992382Spaul } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 7002382Spaul return true; 7012382Spaul } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 7022382Spaul return true; 7032382Spaul } 7042382Spaul return false; 7052382Spaul} 7062382Spaul 7072382Spaulbool os::Solaris::valid_stack_address(Thread* thread, address sp) { 7082382Spaul address stackStart = (address)thread->stack_base(); 7092382Spaul address stackEnd = (address)(stackStart - (address)thread->stack_size()); 7102382Spaul if (sp < stackStart && sp >= stackEnd) return true; 7112382Spaul return false; 7122382Spaul} 7132382Spaul 7142382Spaulextern "C" void breakpoint() { 7152382Spaul // use debugger to set breakpoint here 7162382Spaul} 7172382Spaul 7182382Spaulstatic thread_t main_thread; 7192382Spaul 7202382Spaul// Thread start routine for all new Java threads 7212382Spaulextern "C" void* java_start(void* thread_addr) { 7222382Spaul // Try to randomize the cache line index of hot stack frames. 7232382Spaul // This helps when threads of the same stack traces evict each other's 7242382Spaul // cache lines. The threads can be either from the same JVM instance, or 7252382Spaul // from different JVM instances. The benefit is especially true for 7262382Spaul // processors with hyperthreading technology. 7272382Spaul static int counter = 0; 7282382Spaul int pid = os::current_process_id(); 7292382Spaul alloca(((pid ^ counter++) & 7) * 128); 7302382Spaul 7312382Spaul int prio; 7322382Spaul Thread* thread = (Thread*)thread_addr; 7332382Spaul 7342382Spaul thread->initialize_thread_current(); 7352382Spaul 7362382Spaul OSThread* osthr = thread->osthread(); 7372382Spaul 7382382Spaul osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound 7392382Spaul thread->_schedctl = (void *) schedctl_init(); 7402382Spaul 7412382Spaul log_info(os, thread)("Thread is alive (tid: " UINTX_FORMAT ").", 7422382Spaul os::current_thread_id()); 7432382Spaul 7442382Spaul if (UseNUMA) { 7452382Spaul int lgrp_id = os::numa_get_group_id(); 7462382Spaul if (lgrp_id != -1) { 747 thread->set_lgrp_id(lgrp_id); 748 } 749 } 750 751 // If the creator called set priority before we started, 752 // we need to call set_native_priority now that we have an lwp. 753 // We used to get the priority from thr_getprio (we called 754 // thr_setprio way back in create_thread) and pass it to 755 // set_native_priority, but Solaris scales the priority 756 // in java_to_os_priority, so when we read it back here, 757 // we pass trash to set_native_priority instead of what's 758 // in java_to_os_priority. So we save the native priority 759 // in the osThread and recall it here. 760 761 if (osthr->thread_id() != -1) { 762 if (UseThreadPriorities) { 763 int prio = osthr->native_priority(); 764 if (ThreadPriorityVerbose) { 765 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 766 INTPTR_FORMAT ", setting priority: %d\n", 767 osthr->thread_id(), osthr->lwp_id(), prio); 768 } 769 os::set_native_priority(thread, prio); 770 } 771 } else if (ThreadPriorityVerbose) { 772 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 773 } 774 775 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 776 777 // initialize signal mask for this thread 778 os::Solaris::hotspot_sigmask(thread); 779 780 thread->run(); 781 782 // One less thread is executing 783 // When the VMThread gets here, the main thread may have already exited 784 // which frees the CodeHeap containing the Atomic::dec code 785 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 786 Atomic::dec(&os::Solaris::_os_thread_count); 787 } 788 789 log_info(os, thread)("Thread finished (tid: " UINTX_FORMAT ").", os::current_thread_id()); 790 791 if (UseDetachedThreads) { 792 thr_exit(NULL); 793 ShouldNotReachHere(); 794 } 795 return NULL; 796} 797 798static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 799 // Allocate the OSThread object 800 OSThread* osthread = new OSThread(NULL, NULL); 801 if (osthread == NULL) return NULL; 802 803 // Store info on the Solaris thread into the OSThread 804 osthread->set_thread_id(thread_id); 805 osthread->set_lwp_id(_lwp_self()); 806 thread->_schedctl = (void *) schedctl_init(); 807 808 if (UseNUMA) { 809 int lgrp_id = os::numa_get_group_id(); 810 if (lgrp_id != -1) { 811 thread->set_lgrp_id(lgrp_id); 812 } 813 } 814 815 if (ThreadPriorityVerbose) { 816 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 817 osthread->thread_id(), osthread->lwp_id()); 818 } 819 820 // Initial thread state is INITIALIZED, not SUSPENDED 821 osthread->set_state(INITIALIZED); 822 823 return osthread; 824} 825 826void os::Solaris::hotspot_sigmask(Thread* thread) { 827 //Save caller's signal mask 828 sigset_t sigmask; 829 pthread_sigmask(SIG_SETMASK, NULL, &sigmask); 830 OSThread *osthread = thread->osthread(); 831 osthread->set_caller_sigmask(sigmask); 832 833 pthread_sigmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 834 if (!ReduceSignalUsage) { 835 if (thread->is_VM_thread()) { 836 // Only the VM thread handles BREAK_SIGNAL ... 837 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); 838 } else { 839 // ... all other threads block BREAK_SIGNAL 840 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 841 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); 842 } 843 } 844} 845 846bool os::create_attached_thread(JavaThread* thread) { 847#ifdef ASSERT 848 thread->verify_not_published(); 849#endif 850 OSThread* osthread = create_os_thread(thread, thr_self()); 851 if (osthread == NULL) { 852 return false; 853 } 854 855 // Initial thread state is RUNNABLE 856 osthread->set_state(RUNNABLE); 857 thread->set_osthread(osthread); 858 859 // initialize signal mask for this thread 860 // and save the caller's signal mask 861 os::Solaris::hotspot_sigmask(thread); 862 863 log_info(os, thread)("Thread attached (tid: " UINTX_FORMAT ").", 864 os::current_thread_id()); 865 866 return true; 867} 868 869bool os::create_main_thread(JavaThread* thread) { 870#ifdef ASSERT 871 thread->verify_not_published(); 872#endif 873 if (_starting_thread == NULL) { 874 _starting_thread = create_os_thread(thread, main_thread); 875 if (_starting_thread == NULL) { 876 return false; 877 } 878 } 879 880 // The primodial thread is runnable from the start 881 _starting_thread->set_state(RUNNABLE); 882 883 thread->set_osthread(_starting_thread); 884 885 // initialize signal mask for this thread 886 // and save the caller's signal mask 887 os::Solaris::hotspot_sigmask(thread); 888 889 return true; 890} 891 892// Helper function to trace thread attributes, similar to os::Posix::describe_pthread_attr() 893static char* describe_thr_create_attributes(char* buf, size_t buflen, 894 size_t stacksize, long flags) { 895 stringStream ss(buf, buflen); 896 ss.print("stacksize: " SIZE_FORMAT "k, ", stacksize / 1024); 897 ss.print("flags: "); 898 #define PRINT_FLAG(f) if (flags & f) ss.print( #f " "); 899 #define ALL(X) \ 900 X(THR_SUSPENDED) \ 901 X(THR_DETACHED) \ 902 X(THR_BOUND) \ 903 X(THR_NEW_LWP) \ 904 X(THR_DAEMON) 905 ALL(PRINT_FLAG) 906 #undef ALL 907 #undef PRINT_FLAG 908 return buf; 909} 910 911bool os::create_thread(Thread* thread, ThreadType thr_type, 912 size_t stack_size) { 913 // Allocate the OSThread object 914 OSThread* osthread = new OSThread(NULL, NULL); 915 if (osthread == NULL) { 916 return false; 917 } 918 919 if (ThreadPriorityVerbose) { 920 char *thrtyp; 921 switch (thr_type) { 922 case vm_thread: 923 thrtyp = (char *)"vm"; 924 break; 925 case cgc_thread: 926 thrtyp = (char *)"cgc"; 927 break; 928 case pgc_thread: 929 thrtyp = (char *)"pgc"; 930 break; 931 case java_thread: 932 thrtyp = (char *)"java"; 933 break; 934 case compiler_thread: 935 thrtyp = (char *)"compiler"; 936 break; 937 case watcher_thread: 938 thrtyp = (char *)"watcher"; 939 break; 940 default: 941 thrtyp = (char *)"unknown"; 942 break; 943 } 944 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 945 } 946 947 // Calculate stack size if it's not specified by caller. 948 if (stack_size == 0) { 949 // The default stack size 1M (2M for LP64). 950 stack_size = (BytesPerWord >> 2) * K * K; 951 952 switch (thr_type) { 953 case os::java_thread: 954 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 955 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 956 break; 957 case os::compiler_thread: 958 if (CompilerThreadStackSize > 0) { 959 stack_size = (size_t)(CompilerThreadStackSize * K); 960 break; 961 } // else fall through: 962 // use VMThreadStackSize if CompilerThreadStackSize is not defined 963 case os::vm_thread: 964 case os::pgc_thread: 965 case os::cgc_thread: 966 case os::watcher_thread: 967 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 968 break; 969 } 970 } 971 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 972 973 // Initial state is ALLOCATED but not INITIALIZED 974 osthread->set_state(ALLOCATED); 975 976 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 977 // We got lots of threads. Check if we still have some address space left. 978 // Need to be at least 5Mb of unreserved address space. We do check by 979 // trying to reserve some. 980 const size_t VirtualMemoryBangSize = 20*K*K; 981 char* mem = os::reserve_memory(VirtualMemoryBangSize); 982 if (mem == NULL) { 983 delete osthread; 984 return false; 985 } else { 986 // Release the memory again 987 os::release_memory(mem, VirtualMemoryBangSize); 988 } 989 } 990 991 // Setup osthread because the child thread may need it. 992 thread->set_osthread(osthread); 993 994 // Create the Solaris thread 995 thread_t tid = 0; 996 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED; 997 int status; 998 999 // Mark that we don't have an lwp or thread id yet. 1000 // In case we attempt to set the priority before the thread starts. 1001 osthread->set_lwp_id(-1); 1002 osthread->set_thread_id(-1); 1003 1004 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1005 1006 char buf[64]; 1007 if (status == 0) { 1008 log_info(os, thread)("Thread started (tid: " UINTX_FORMAT ", attributes: %s). ", 1009 (uintx) tid, describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags)); 1010 } else { 1011 log_warning(os, thread)("Failed to start thread - thr_create failed (%s) for attributes: %s.", 1012 os::errno_name(status), describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags)); 1013 } 1014 1015 if (status != 0) { 1016 thread->set_osthread(NULL); 1017 // Need to clean up stuff we've allocated so far 1018 delete osthread; 1019 return false; 1020 } 1021 1022 Atomic::inc(&os::Solaris::_os_thread_count); 1023 1024 // Store info on the Solaris thread into the OSThread 1025 osthread->set_thread_id(tid); 1026 1027 // Remember that we created this thread so we can set priority on it 1028 osthread->set_vm_created(); 1029 1030 // Initial thread state is INITIALIZED, not SUSPENDED 1031 osthread->set_state(INITIALIZED); 1032 1033 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1034 return true; 1035} 1036 1037// defined for >= Solaris 10. This allows builds on earlier versions 1038// of Solaris to take advantage of the newly reserved Solaris JVM signals. 1039// With SIGJVM1, SIGJVM2, ASYNC_SIGNAL is SIGJVM2. Previously INTERRUPT_SIGNAL 1040// was SIGJVM1. 1041// 1042#if !defined(SIGJVM1) 1043 #define SIGJVM1 39 1044 #define SIGJVM2 40 1045#endif 1046 1047debug_only(static bool signal_sets_initialized = false); 1048static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1049 1050int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1051 1052bool os::Solaris::is_sig_ignored(int sig) { 1053 struct sigaction oact; 1054 sigaction(sig, (struct sigaction*)NULL, &oact); 1055 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1056 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1057 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) { 1058 return true; 1059 } else { 1060 return false; 1061 } 1062} 1063 1064// Note: SIGRTMIN is a macro that calls sysconf() so it will 1065// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1066static bool isJVM1available() { 1067 return SIGJVM1 < SIGRTMIN; 1068} 1069 1070void os::Solaris::signal_sets_init() { 1071 // Should also have an assertion stating we are still single-threaded. 1072 assert(!signal_sets_initialized, "Already initialized"); 1073 // Fill in signals that are necessarily unblocked for all threads in 1074 // the VM. Currently, we unblock the following signals: 1075 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1076 // by -Xrs (=ReduceSignalUsage)); 1077 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1078 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1079 // the dispositions or masks wrt these signals. 1080 // Programs embedding the VM that want to use the above signals for their 1081 // own purposes must, at this time, use the "-Xrs" option to prevent 1082 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1083 // (See bug 4345157, and other related bugs). 1084 // In reality, though, unblocking these signals is really a nop, since 1085 // these signals are not blocked by default. 1086 sigemptyset(&unblocked_sigs); 1087 sigemptyset(&allowdebug_blocked_sigs); 1088 sigaddset(&unblocked_sigs, SIGILL); 1089 sigaddset(&unblocked_sigs, SIGSEGV); 1090 sigaddset(&unblocked_sigs, SIGBUS); 1091 sigaddset(&unblocked_sigs, SIGFPE); 1092 1093 // Always true on Solaris 10+ 1094 guarantee(isJVM1available(), "SIGJVM1/2 missing!"); 1095 os::Solaris::set_SIGasync(SIGJVM2); 1096 1097 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1098 1099 if (!ReduceSignalUsage) { 1100 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1101 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1102 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1103 } 1104 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1105 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1106 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1107 } 1108 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1109 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1110 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1111 } 1112 } 1113 // Fill in signals that are blocked by all but the VM thread. 1114 sigemptyset(&vm_sigs); 1115 if (!ReduceSignalUsage) { 1116 sigaddset(&vm_sigs, BREAK_SIGNAL); 1117 } 1118 debug_only(signal_sets_initialized = true); 1119 1120 // For diagnostics only used in run_periodic_checks 1121 sigemptyset(&check_signal_done); 1122} 1123 1124// These are signals that are unblocked while a thread is running Java. 1125// (For some reason, they get blocked by default.) 1126sigset_t* os::Solaris::unblocked_signals() { 1127 assert(signal_sets_initialized, "Not initialized"); 1128 return &unblocked_sigs; 1129} 1130 1131// These are the signals that are blocked while a (non-VM) thread is 1132// running Java. Only the VM thread handles these signals. 1133sigset_t* os::Solaris::vm_signals() { 1134 assert(signal_sets_initialized, "Not initialized"); 1135 return &vm_sigs; 1136} 1137 1138// These are signals that are blocked during cond_wait to allow debugger in 1139sigset_t* os::Solaris::allowdebug_blocked_signals() { 1140 assert(signal_sets_initialized, "Not initialized"); 1141 return &allowdebug_blocked_sigs; 1142} 1143 1144 1145void _handle_uncaught_cxx_exception() { 1146 VMError::report_and_die("An uncaught C++ exception"); 1147} 1148 1149 1150// First crack at OS-specific initialization, from inside the new thread. 1151void os::initialize_thread(Thread* thr) { 1152 int r = thr_main(); 1153 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 1154 if (r) { 1155 JavaThread* jt = (JavaThread *)thr; 1156 assert(jt != NULL, "Sanity check"); 1157 size_t stack_size; 1158 address base = jt->stack_base(); 1159 if (Arguments::created_by_java_launcher()) { 1160 // Use 2MB to allow for Solaris 7 64 bit mode. 1161 stack_size = JavaThread::stack_size_at_create() == 0 1162 ? 2048*K : JavaThread::stack_size_at_create(); 1163 1164 // There are rare cases when we may have already used more than 1165 // the basic stack size allotment before this method is invoked. 1166 // Attempt to allow for a normally sized java_stack. 1167 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1168 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1169 } else { 1170 // 6269555: If we were not created by a Java launcher, i.e. if we are 1171 // running embedded in a native application, treat the primordial thread 1172 // as much like a native attached thread as possible. This means using 1173 // the current stack size from thr_stksegment(), unless it is too large 1174 // to reliably setup guard pages. A reasonable max size is 8MB. 1175 size_t current_size = current_stack_size(); 1176 // This should never happen, but just in case.... 1177 if (current_size == 0) current_size = 2 * K * K; 1178 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1179 } 1180 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1181 stack_size = (size_t)(base - bottom); 1182 1183 assert(stack_size > 0, "Stack size calculation problem"); 1184 1185 if (stack_size > jt->stack_size()) { 1186#ifndef PRODUCT 1187 struct rlimit limits; 1188 getrlimit(RLIMIT_STACK, &limits); 1189 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1190 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1191#endif 1192 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n" 1193 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1194 "See limit(1) to increase the stack size limit.", 1195 stack_size / K, jt->stack_size() / K); 1196 vm_exit(1); 1197 } 1198 assert(jt->stack_size() >= stack_size, 1199 "Attempt to map more stack than was allocated"); 1200 jt->set_stack_size(stack_size); 1201 } 1202 1203 // With the T2 libthread (T1 is no longer supported) threads are always bound 1204 // and we use stackbanging in all cases. 1205 1206 os::Solaris::init_thread_fpu_state(); 1207 std::set_terminate(_handle_uncaught_cxx_exception); 1208} 1209 1210 1211 1212// Free Solaris resources related to the OSThread 1213void os::free_thread(OSThread* osthread) { 1214 assert(osthread != NULL, "os::free_thread but osthread not set"); 1215 1216 1217 // We are told to free resources of the argument thread, 1218 // but we can only really operate on the current thread. 1219 // The main thread must take the VMThread down synchronously 1220 // before the main thread exits and frees up CodeHeap 1221 guarantee((Thread::current()->osthread() == osthread 1222 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1223 if (Thread::current()->osthread() == osthread) { 1224 // Restore caller's signal mask 1225 sigset_t sigmask = osthread->caller_sigmask(); 1226 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); 1227 } 1228 delete osthread; 1229} 1230 1231void os::pd_start_thread(Thread* thread) { 1232 int status = thr_continue(thread->osthread()->thread_id()); 1233 assert_status(status == 0, status, "thr_continue failed"); 1234} 1235 1236 1237intx os::current_thread_id() { 1238 return (intx)thr_self(); 1239} 1240 1241static pid_t _initial_pid = 0; 1242 1243int os::current_process_id() { 1244 return (int)(_initial_pid ? _initial_pid : getpid()); 1245} 1246 1247// gethrtime() should be monotonic according to the documentation, 1248// but some virtualized platforms are known to break this guarantee. 1249// getTimeNanos() must be guaranteed not to move backwards, so we 1250// are forced to add a check here. 1251inline hrtime_t getTimeNanos() { 1252 const hrtime_t now = gethrtime(); 1253 const hrtime_t prev = max_hrtime; 1254 if (now <= prev) { 1255 return prev; // same or retrograde time; 1256 } 1257 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1258 assert(obsv >= prev, "invariant"); // Monotonicity 1259 // If the CAS succeeded then we're done and return "now". 1260 // If the CAS failed and the observed value "obsv" is >= now then 1261 // we should return "obsv". If the CAS failed and now > obsv > prv then 1262 // some other thread raced this thread and installed a new value, in which case 1263 // we could either (a) retry the entire operation, (b) retry trying to install now 1264 // or (c) just return obsv. We use (c). No loop is required although in some cases 1265 // we might discard a higher "now" value in deference to a slightly lower but freshly 1266 // installed obsv value. That's entirely benign -- it admits no new orderings compared 1267 // to (a) or (b) -- and greatly reduces coherence traffic. 1268 // We might also condition (c) on the magnitude of the delta between obsv and now. 1269 // Avoiding excessive CAS operations to hot RW locations is critical. 1270 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate 1271 return (prev == obsv) ? now : obsv; 1272} 1273 1274// Time since start-up in seconds to a fine granularity. 1275// Used by VMSelfDestructTimer and the MemProfiler. 1276double os::elapsedTime() { 1277 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1278} 1279 1280jlong os::elapsed_counter() { 1281 return (jlong)(getTimeNanos() - first_hrtime); 1282} 1283 1284jlong os::elapsed_frequency() { 1285 return hrtime_hz; 1286} 1287 1288// Return the real, user, and system times in seconds from an 1289// arbitrary fixed point in the past. 1290bool os::getTimesSecs(double* process_real_time, 1291 double* process_user_time, 1292 double* process_system_time) { 1293 struct tms ticks; 1294 clock_t real_ticks = times(&ticks); 1295 1296 if (real_ticks == (clock_t) (-1)) { 1297 return false; 1298 } else { 1299 double ticks_per_second = (double) clock_tics_per_sec; 1300 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1301 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1302 // For consistency return the real time from getTimeNanos() 1303 // converted to seconds. 1304 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1305 1306 return true; 1307 } 1308} 1309 1310bool os::supports_vtime() { return true; } 1311 1312bool os::enable_vtime() { 1313 int fd = ::open("/proc/self/ctl", O_WRONLY); 1314 if (fd == -1) { 1315 return false; 1316 } 1317 1318 long cmd[] = { PCSET, PR_MSACCT }; 1319 int res = ::write(fd, cmd, sizeof(long) * 2); 1320 ::close(fd); 1321 if (res != sizeof(long) * 2) { 1322 return false; 1323 } 1324 return true; 1325} 1326 1327bool os::vtime_enabled() { 1328 int fd = ::open("/proc/self/status", O_RDONLY); 1329 if (fd == -1) { 1330 return false; 1331 } 1332 1333 pstatus_t status; 1334 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1335 ::close(fd); 1336 if (res != sizeof(pstatus_t)) { 1337 return false; 1338 } 1339 return status.pr_flags & PR_MSACCT; 1340} 1341 1342double os::elapsedVTime() { 1343 return (double)gethrvtime() / (double)hrtime_hz; 1344} 1345 1346// Used internally for comparisons only 1347// getTimeMillis guaranteed to not move backwards on Solaris 1348jlong getTimeMillis() { 1349 jlong nanotime = getTimeNanos(); 1350 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1351} 1352 1353// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1354jlong os::javaTimeMillis() { 1355 timeval t; 1356 if (gettimeofday(&t, NULL) == -1) { 1357 fatal("os::javaTimeMillis: gettimeofday (%s)", os::strerror(errno)); 1358 } 1359 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1360} 1361 1362void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) { 1363 timeval t; 1364 if (gettimeofday(&t, NULL) == -1) { 1365 fatal("os::javaTimeSystemUTC: gettimeofday (%s)", os::strerror(errno)); 1366 } 1367 seconds = jlong(t.tv_sec); 1368 nanos = jlong(t.tv_usec) * 1000; 1369} 1370 1371 1372jlong os::javaTimeNanos() { 1373 return (jlong)getTimeNanos(); 1374} 1375 1376void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1377 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1378 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1379 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1380 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1381} 1382 1383char * os::local_time_string(char *buf, size_t buflen) { 1384 struct tm t; 1385 time_t long_time; 1386 time(&long_time); 1387 localtime_r(&long_time, &t); 1388 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1389 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1390 t.tm_hour, t.tm_min, t.tm_sec); 1391 return buf; 1392} 1393 1394// Note: os::shutdown() might be called very early during initialization, or 1395// called from signal handler. Before adding something to os::shutdown(), make 1396// sure it is async-safe and can handle partially initialized VM. 1397void os::shutdown() { 1398 1399 // allow PerfMemory to attempt cleanup of any persistent resources 1400 perfMemory_exit(); 1401 1402 // needs to remove object in file system 1403 AttachListener::abort(); 1404 1405 // flush buffered output, finish log files 1406 ostream_abort(); 1407 1408 // Check for abort hook 1409 abort_hook_t abort_hook = Arguments::abort_hook(); 1410 if (abort_hook != NULL) { 1411 abort_hook(); 1412 } 1413} 1414 1415// Note: os::abort() might be called very early during initialization, or 1416// called from signal handler. Before adding something to os::abort(), make 1417// sure it is async-safe and can handle partially initialized VM. 1418void os::abort(bool dump_core, void* siginfo, const void* context) { 1419 os::shutdown(); 1420 if (dump_core) { 1421#ifndef PRODUCT 1422 fdStream out(defaultStream::output_fd()); 1423 out.print_raw("Current thread is "); 1424 char buf[16]; 1425 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1426 out.print_raw_cr(buf); 1427 out.print_raw_cr("Dumping core ..."); 1428#endif 1429 ::abort(); // dump core (for debugging) 1430 } 1431 1432 ::exit(1); 1433} 1434 1435// Die immediately, no exit hook, no abort hook, no cleanup. 1436void os::die() { 1437 ::abort(); // dump core (for debugging) 1438} 1439 1440// DLL functions 1441 1442const char* os::dll_file_extension() { return ".so"; } 1443 1444// This must be hard coded because it's the system's temporary 1445// directory not the java application's temp directory, ala java.io.tmpdir. 1446const char* os::get_temp_directory() { return "/tmp"; } 1447 1448static bool file_exists(const char* filename) { 1449 struct stat statbuf; 1450 if (filename == NULL || strlen(filename) == 0) { 1451 return false; 1452 } 1453 return os::stat(filename, &statbuf) == 0; 1454} 1455 1456bool os::dll_build_name(char* buffer, size_t buflen, 1457 const char* pname, const char* fname) { 1458 bool retval = false; 1459 const size_t pnamelen = pname ? strlen(pname) : 0; 1460 1461 // Return error on buffer overflow. 1462 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1463 return retval; 1464 } 1465 1466 if (pnamelen == 0) { 1467 snprintf(buffer, buflen, "lib%s.so", fname); 1468 retval = true; 1469 } else if (strchr(pname, *os::path_separator()) != NULL) { 1470 int n; 1471 char** pelements = split_path(pname, &n); 1472 if (pelements == NULL) { 1473 return false; 1474 } 1475 for (int i = 0; i < n; i++) { 1476 // really shouldn't be NULL but what the heck, check can't hurt 1477 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1478 continue; // skip the empty path values 1479 } 1480 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1481 if (file_exists(buffer)) { 1482 retval = true; 1483 break; 1484 } 1485 } 1486 // release the storage 1487 for (int i = 0; i < n; i++) { 1488 if (pelements[i] != NULL) { 1489 FREE_C_HEAP_ARRAY(char, pelements[i]); 1490 } 1491 } 1492 if (pelements != NULL) { 1493 FREE_C_HEAP_ARRAY(char*, pelements); 1494 } 1495 } else { 1496 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1497 retval = true; 1498 } 1499 return retval; 1500} 1501 1502// check if addr is inside libjvm.so 1503bool os::address_is_in_vm(address addr) { 1504 static address libjvm_base_addr; 1505 Dl_info dlinfo; 1506 1507 if (libjvm_base_addr == NULL) { 1508 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { 1509 libjvm_base_addr = (address)dlinfo.dli_fbase; 1510 } 1511 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1512 } 1513 1514 if (dladdr((void *)addr, &dlinfo) != 0) { 1515 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1516 } 1517 1518 return false; 1519} 1520 1521typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int); 1522static dladdr1_func_type dladdr1_func = NULL; 1523 1524bool os::dll_address_to_function_name(address addr, char *buf, 1525 int buflen, int * offset, 1526 bool demangle) { 1527 // buf is not optional, but offset is optional 1528 assert(buf != NULL, "sanity check"); 1529 1530 Dl_info dlinfo; 1531 1532 // dladdr1_func was initialized in os::init() 1533 if (dladdr1_func != NULL) { 1534 // yes, we have dladdr1 1535 1536 // Support for dladdr1 is checked at runtime; it may be 1537 // available even if the vm is built on a machine that does 1538 // not have dladdr1 support. Make sure there is a value for 1539 // RTLD_DL_SYMENT. 1540#ifndef RTLD_DL_SYMENT 1541 #define RTLD_DL_SYMENT 1 1542#endif 1543#ifdef _LP64 1544 Elf64_Sym * info; 1545#else 1546 Elf32_Sym * info; 1547#endif 1548 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1549 RTLD_DL_SYMENT) != 0) { 1550 // see if we have a matching symbol that covers our address 1551 if (dlinfo.dli_saddr != NULL && 1552 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1553 if (dlinfo.dli_sname != NULL) { 1554 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1555 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1556 } 1557 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1558 return true; 1559 } 1560 } 1561 // no matching symbol so try for just file info 1562 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1563 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1564 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1565 return true; 1566 } 1567 } 1568 } 1569 buf[0] = '\0'; 1570 if (offset != NULL) *offset = -1; 1571 return false; 1572 } 1573 1574 // no, only dladdr is available 1575 if (dladdr((void *)addr, &dlinfo) != 0) { 1576 // see if we have a matching symbol 1577 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { 1578 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1579 jio_snprintf(buf, buflen, dlinfo.dli_sname); 1580 } 1581 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1582 return true; 1583 } 1584 // no matching symbol so try for just file info 1585 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1586 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1587 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1588 return true; 1589 } 1590 } 1591 } 1592 buf[0] = '\0'; 1593 if (offset != NULL) *offset = -1; 1594 return false; 1595} 1596 1597bool os::dll_address_to_library_name(address addr, char* buf, 1598 int buflen, int* offset) { 1599 // buf is not optional, but offset is optional 1600 assert(buf != NULL, "sanity check"); 1601 1602 Dl_info dlinfo; 1603 1604 if (dladdr((void*)addr, &dlinfo) != 0) { 1605 if (dlinfo.dli_fname != NULL) { 1606 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1607 } 1608 if (dlinfo.dli_fbase != NULL && offset != NULL) { 1609 *offset = addr - (address)dlinfo.dli_fbase; 1610 } 1611 return true; 1612 } 1613 1614 buf[0] = '\0'; 1615 if (offset) *offset = -1; 1616 return false; 1617} 1618 1619int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) { 1620 Dl_info dli; 1621 // Sanity check? 1622 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 || 1623 dli.dli_fname == NULL) { 1624 return 1; 1625 } 1626 1627 void * handle = dlopen(dli.dli_fname, RTLD_LAZY); 1628 if (handle == NULL) { 1629 return 1; 1630 } 1631 1632 Link_map *map; 1633 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1634 if (map == NULL) { 1635 dlclose(handle); 1636 return 1; 1637 } 1638 1639 while (map->l_prev != NULL) { 1640 map = map->l_prev; 1641 } 1642 1643 while (map != NULL) { 1644 // Iterate through all map entries and call callback with fields of interest 1645 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) { 1646 dlclose(handle); 1647 return 1; 1648 } 1649 map = map->l_next; 1650 } 1651 1652 dlclose(handle); 1653 return 0; 1654} 1655 1656int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) { 1657 outputStream * out = (outputStream *) param; 1658 out->print_cr(PTR_FORMAT " \t%s", base_address, name); 1659 return 0; 1660} 1661 1662void os::print_dll_info(outputStream * st) { 1663 st->print_cr("Dynamic libraries:"); st->flush(); 1664 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) { 1665 st->print_cr("Error: Cannot print dynamic libraries."); 1666 } 1667} 1668 1669// Loads .dll/.so and 1670// in case of error it checks if .dll/.so was built for the 1671// same architecture as Hotspot is running on 1672 1673void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { 1674 void * result= ::dlopen(filename, RTLD_LAZY); 1675 if (result != NULL) { 1676 // Successful loading 1677 return result; 1678 } 1679 1680 Elf32_Ehdr elf_head; 1681 1682 // Read system error message into ebuf 1683 // It may or may not be overwritten below 1684 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1685 ebuf[ebuflen-1]='\0'; 1686 int diag_msg_max_length=ebuflen-strlen(ebuf); 1687 char* diag_msg_buf=ebuf+strlen(ebuf); 1688 1689 if (diag_msg_max_length==0) { 1690 // No more space in ebuf for additional diagnostics message 1691 return NULL; 1692 } 1693 1694 1695 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1696 1697 if (file_descriptor < 0) { 1698 // Can't open library, report dlerror() message 1699 return NULL; 1700 } 1701 1702 bool failed_to_read_elf_head= 1703 (sizeof(elf_head)!= 1704 (::read(file_descriptor, &elf_head,sizeof(elf_head)))); 1705 1706 ::close(file_descriptor); 1707 if (failed_to_read_elf_head) { 1708 // file i/o error - report dlerror() msg 1709 return NULL; 1710 } 1711 1712 typedef struct { 1713 Elf32_Half code; // Actual value as defined in elf.h 1714 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1715 char elf_class; // 32 or 64 bit 1716 char endianess; // MSB or LSB 1717 char* name; // String representation 1718 } arch_t; 1719 1720 static const arch_t arch_array[]={ 1721 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1722 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1723 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1724 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1725 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1726 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1727 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1728 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1729 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 1730 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 1731 }; 1732 1733#if (defined IA32) 1734 static Elf32_Half running_arch_code=EM_386; 1735#elif (defined AMD64) 1736 static Elf32_Half running_arch_code=EM_X86_64; 1737#elif (defined IA64) 1738 static Elf32_Half running_arch_code=EM_IA_64; 1739#elif (defined __sparc) && (defined _LP64) 1740 static Elf32_Half running_arch_code=EM_SPARCV9; 1741#elif (defined __sparc) && (!defined _LP64) 1742 static Elf32_Half running_arch_code=EM_SPARC; 1743#elif (defined __powerpc64__) 1744 static Elf32_Half running_arch_code=EM_PPC64; 1745#elif (defined __powerpc__) 1746 static Elf32_Half running_arch_code=EM_PPC; 1747#elif (defined ARM) 1748 static Elf32_Half running_arch_code=EM_ARM; 1749#else 1750 #error Method os::dll_load requires that one of following is defined:\ 1751 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 1752#endif 1753 1754 // Identify compatability class for VM's architecture and library's architecture 1755 // Obtain string descriptions for architectures 1756 1757 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1758 int running_arch_index=-1; 1759 1760 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) { 1761 if (running_arch_code == arch_array[i].code) { 1762 running_arch_index = i; 1763 } 1764 if (lib_arch.code == arch_array[i].code) { 1765 lib_arch.compat_class = arch_array[i].compat_class; 1766 lib_arch.name = arch_array[i].name; 1767 } 1768 } 1769 1770 assert(running_arch_index != -1, 1771 "Didn't find running architecture code (running_arch_code) in arch_array"); 1772 if (running_arch_index == -1) { 1773 // Even though running architecture detection failed 1774 // we may still continue with reporting dlerror() message 1775 return NULL; 1776 } 1777 1778 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 1779 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 1780 return NULL; 1781 } 1782 1783 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 1784 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 1785 return NULL; 1786 } 1787 1788 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 1789 if (lib_arch.name!=NULL) { 1790 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1791 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 1792 lib_arch.name, arch_array[running_arch_index].name); 1793 } else { 1794 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1795 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 1796 lib_arch.code, 1797 arch_array[running_arch_index].name); 1798 } 1799 } 1800 1801 return NULL; 1802} 1803 1804void* os::dll_lookup(void* handle, const char* name) { 1805 return dlsym(handle, name); 1806} 1807 1808void* os::get_default_process_handle() { 1809 return (void*)::dlopen(NULL, RTLD_LAZY); 1810} 1811 1812int os::stat(const char *path, struct stat *sbuf) { 1813 char pathbuf[MAX_PATH]; 1814 if (strlen(path) > MAX_PATH - 1) { 1815 errno = ENAMETOOLONG; 1816 return -1; 1817 } 1818 os::native_path(strcpy(pathbuf, path)); 1819 return ::stat(pathbuf, sbuf); 1820} 1821 1822static bool _print_ascii_file(const char* filename, outputStream* st) { 1823 int fd = ::open(filename, O_RDONLY); 1824 if (fd == -1) { 1825 return false; 1826 } 1827 1828 char buf[32]; 1829 int bytes; 1830 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 1831 st->print_raw(buf, bytes); 1832 } 1833 1834 ::close(fd); 1835 1836 return true; 1837} 1838 1839void os::print_os_info_brief(outputStream* st) { 1840 os::Solaris::print_distro_info(st); 1841 1842 os::Posix::print_uname_info(st); 1843 1844 os::Solaris::print_libversion_info(st); 1845} 1846 1847void os::print_os_info(outputStream* st) { 1848 st->print("OS:"); 1849 1850 os::Solaris::print_distro_info(st); 1851 1852 os::Posix::print_uname_info(st); 1853 1854 os::Solaris::print_libversion_info(st); 1855 1856 os::Posix::print_rlimit_info(st); 1857 1858 os::Posix::print_load_average(st); 1859} 1860 1861void os::Solaris::print_distro_info(outputStream* st) { 1862 if (!_print_ascii_file("/etc/release", st)) { 1863 st->print("Solaris"); 1864 } 1865 st->cr(); 1866} 1867 1868void os::get_summary_os_info(char* buf, size_t buflen) { 1869 strncpy(buf, "Solaris", buflen); // default to plain solaris 1870 FILE* fp = fopen("/etc/release", "r"); 1871 if (fp != NULL) { 1872 char tmp[256]; 1873 // Only get the first line and chop out everything but the os name. 1874 if (fgets(tmp, sizeof(tmp), fp)) { 1875 char* ptr = tmp; 1876 // skip past whitespace characters 1877 while (*ptr != '\0' && (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')) ptr++; 1878 if (*ptr != '\0') { 1879 char* nl = strchr(ptr, '\n'); 1880 if (nl != NULL) *nl = '\0'; 1881 strncpy(buf, ptr, buflen); 1882 } 1883 } 1884 fclose(fp); 1885 } 1886} 1887 1888void os::Solaris::print_libversion_info(outputStream* st) { 1889 st->print(" (T2 libthread)"); 1890 st->cr(); 1891} 1892 1893static bool check_addr0(outputStream* st) { 1894 jboolean status = false; 1895 const int read_chunk = 200; 1896 int ret = 0; 1897 int nmap = 0; 1898 int fd = ::open("/proc/self/map",O_RDONLY); 1899 if (fd >= 0) { 1900 prmap_t *p = NULL; 1901 char *mbuff = (char *) calloc(read_chunk, sizeof(prmap_t)); 1902 if (NULL == mbuff) { 1903 ::close(fd); 1904 return status; 1905 } 1906 while ((ret = ::read(fd, mbuff, read_chunk*sizeof(prmap_t))) > 0) { 1907 //check if read() has not read partial data 1908 if( 0 != ret % sizeof(prmap_t)){ 1909 break; 1910 } 1911 nmap = ret / sizeof(prmap_t); 1912 p = (prmap_t *)mbuff; 1913 for(int i = 0; i < nmap; i++){ 1914 if (p->pr_vaddr == 0x0) { 1915 st->print("Warning: Address: " PTR_FORMAT ", Size: " SIZE_FORMAT "K, ",p->pr_vaddr, p->pr_size/1024); 1916 st->print("Mapped file: %s, ", p->pr_mapname[0] == '\0' ? "None" : p->pr_mapname); 1917 st->print("Access: "); 1918 st->print("%s",(p->pr_mflags & MA_READ) ? "r" : "-"); 1919 st->print("%s",(p->pr_mflags & MA_WRITE) ? "w" : "-"); 1920 st->print("%s",(p->pr_mflags & MA_EXEC) ? "x" : "-"); 1921 st->cr(); 1922 status = true; 1923 } 1924 p++; 1925 } 1926 } 1927 free(mbuff); 1928 ::close(fd); 1929 } 1930 return status; 1931} 1932 1933void os::get_summary_cpu_info(char* buf, size_t buflen) { 1934 // Get MHz with system call. We don't seem to already have this. 1935 processor_info_t stats; 1936 processorid_t id = getcpuid(); 1937 int clock = 0; 1938 if (processor_info(id, &stats) != -1) { 1939 clock = stats.pi_clock; // pi_processor_type isn't more informative than below 1940 } 1941#ifdef AMD64 1942 snprintf(buf, buflen, "x86 64 bit %d MHz", clock); 1943#else 1944 // must be sparc 1945 snprintf(buf, buflen, "Sparcv9 64 bit %d MHz", clock); 1946#endif 1947} 1948 1949void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) { 1950 // Nothing to do for now. 1951} 1952 1953void os::print_memory_info(outputStream* st) { 1954 st->print("Memory:"); 1955 st->print(" %dk page", os::vm_page_size()>>10); 1956 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 1957 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 1958 st->cr(); 1959 (void) check_addr0(st); 1960} 1961 1962// Moved from whole group, because we need them here for diagnostic 1963// prints. 1964#define OLDMAXSIGNUM 32 1965static int Maxsignum = 0; 1966static int *ourSigFlags = NULL; 1967 1968int os::Solaris::get_our_sigflags(int sig) { 1969 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1970 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1971 return ourSigFlags[sig]; 1972} 1973 1974void os::Solaris::set_our_sigflags(int sig, int flags) { 1975 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1976 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1977 ourSigFlags[sig] = flags; 1978} 1979 1980 1981static const char* get_signal_handler_name(address handler, 1982 char* buf, int buflen) { 1983 int offset; 1984 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 1985 if (found) { 1986 // skip directory names 1987 const char *p1, *p2; 1988 p1 = buf; 1989 size_t len = strlen(os::file_separator()); 1990 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 1991 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 1992 } else { 1993 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 1994 } 1995 return buf; 1996} 1997 1998static void print_signal_handler(outputStream* st, int sig, 1999 char* buf, size_t buflen) { 2000 struct sigaction sa; 2001 2002 sigaction(sig, NULL, &sa); 2003 2004 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2005 2006 address handler = (sa.sa_flags & SA_SIGINFO) 2007 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2008 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2009 2010 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2011 st->print("SIG_DFL"); 2012 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2013 st->print("SIG_IGN"); 2014 } else { 2015 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2016 } 2017 2018 st->print(", sa_mask[0]="); 2019 os::Posix::print_signal_set_short(st, &sa.sa_mask); 2020 2021 address rh = VMError::get_resetted_sighandler(sig); 2022 // May be, handler was resetted by VMError? 2023 if (rh != NULL) { 2024 handler = rh; 2025 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2026 } 2027 2028 st->print(", sa_flags="); 2029 os::Posix::print_sa_flags(st, sa.sa_flags); 2030 2031 // Check: is it our handler? 2032 if (handler == CAST_FROM_FN_PTR(address, signalHandler)) { 2033 // It is our signal handler 2034 // check for flags 2035 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2036 st->print( 2037 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2038 os::Solaris::get_our_sigflags(sig)); 2039 } 2040 } 2041 st->cr(); 2042} 2043 2044void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2045 st->print_cr("Signal Handlers:"); 2046 print_signal_handler(st, SIGSEGV, buf, buflen); 2047 print_signal_handler(st, SIGBUS , buf, buflen); 2048 print_signal_handler(st, SIGFPE , buf, buflen); 2049 print_signal_handler(st, SIGPIPE, buf, buflen); 2050 print_signal_handler(st, SIGXFSZ, buf, buflen); 2051 print_signal_handler(st, SIGILL , buf, buflen); 2052 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2053 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2054 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2055 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2056 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2057 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2058} 2059 2060static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2061 2062// Find the full path to the current module, libjvm.so 2063void os::jvm_path(char *buf, jint buflen) { 2064 // Error checking. 2065 if (buflen < MAXPATHLEN) { 2066 assert(false, "must use a large-enough buffer"); 2067 buf[0] = '\0'; 2068 return; 2069 } 2070 // Lazy resolve the path to current module. 2071 if (saved_jvm_path[0] != 0) { 2072 strcpy(buf, saved_jvm_path); 2073 return; 2074 } 2075 2076 Dl_info dlinfo; 2077 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2078 assert(ret != 0, "cannot locate libjvm"); 2079 if (ret != 0 && dlinfo.dli_fname != NULL) { 2080 realpath((char *)dlinfo.dli_fname, buf); 2081 } else { 2082 buf[0] = '\0'; 2083 return; 2084 } 2085 2086 if (Arguments::sun_java_launcher_is_altjvm()) { 2087 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical 2088 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". 2089 // If "/jre/lib/" appears at the right place in the string, then 2090 // assume we are installed in a JDK and we're done. Otherwise, check 2091 // for a JAVA_HOME environment variable and fix up the path so it 2092 // looks like libjvm.so is installed there (append a fake suffix 2093 // hotspot/libjvm.so). 2094 const char *p = buf + strlen(buf) - 1; 2095 for (int count = 0; p > buf && count < 5; ++count) { 2096 for (--p; p > buf && *p != '/'; --p) 2097 /* empty */ ; 2098 } 2099 2100 if (strncmp(p, "/jre/lib/", 9) != 0) { 2101 // Look for JAVA_HOME in the environment. 2102 char* java_home_var = ::getenv("JAVA_HOME"); 2103 if (java_home_var != NULL && java_home_var[0] != 0) { 2104 char cpu_arch[12]; 2105 char* jrelib_p; 2106 int len; 2107 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2108#ifdef _LP64 2109 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2110 if (strcmp(cpu_arch, "sparc") == 0) { 2111 strcat(cpu_arch, "v9"); 2112 } else if (strcmp(cpu_arch, "i386") == 0) { 2113 strcpy(cpu_arch, "amd64"); 2114 } 2115#endif 2116 // Check the current module name "libjvm.so". 2117 p = strrchr(buf, '/'); 2118 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2119 2120 realpath(java_home_var, buf); 2121 // determine if this is a legacy image or modules image 2122 // modules image doesn't have "jre" subdirectory 2123 len = strlen(buf); 2124 assert(len < buflen, "Ran out of buffer space"); 2125 jrelib_p = buf + len; 2126 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2127 if (0 != access(buf, F_OK)) { 2128 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2129 } 2130 2131 if (0 == access(buf, F_OK)) { 2132 // Use current module name "libjvm.so" 2133 len = strlen(buf); 2134 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2135 } else { 2136 // Go back to path of .so 2137 realpath((char *)dlinfo.dli_fname, buf); 2138 } 2139 } 2140 } 2141 } 2142 2143 strncpy(saved_jvm_path, buf, MAXPATHLEN); 2144 saved_jvm_path[MAXPATHLEN - 1] = '\0'; 2145} 2146 2147 2148void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2149 // no prefix required, not even "_" 2150} 2151 2152 2153void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2154 // no suffix required 2155} 2156 2157// This method is a copy of JDK's sysGetLastErrorString 2158// from src/solaris/hpi/src/system_md.c 2159 2160size_t os::lasterror(char *buf, size_t len) { 2161 if (errno == 0) return 0; 2162 2163 const char *s = os::strerror(errno); 2164 size_t n = ::strlen(s); 2165 if (n >= len) { 2166 n = len - 1; 2167 } 2168 ::strncpy(buf, s, n); 2169 buf[n] = '\0'; 2170 return n; 2171} 2172 2173 2174// sun.misc.Signal 2175 2176extern "C" { 2177 static void UserHandler(int sig, void *siginfo, void *context) { 2178 // Ctrl-C is pressed during error reporting, likely because the error 2179 // handler fails to abort. Let VM die immediately. 2180 if (sig == SIGINT && is_error_reported()) { 2181 os::die(); 2182 } 2183 2184 os::signal_notify(sig); 2185 // We do not need to reinstate the signal handler each time... 2186 } 2187} 2188 2189void* os::user_handler() { 2190 return CAST_FROM_FN_PTR(void*, UserHandler); 2191} 2192 2193struct timespec PosixSemaphore::create_timespec(unsigned int sec, int nsec) { 2194 struct timespec ts; 2195 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2196 2197 return ts; 2198} 2199 2200extern "C" { 2201 typedef void (*sa_handler_t)(int); 2202 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2203} 2204 2205void* os::signal(int signal_number, void* handler) { 2206 struct sigaction sigAct, oldSigAct; 2207 sigfillset(&(sigAct.sa_mask)); 2208 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2209 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2210 2211 if (sigaction(signal_number, &sigAct, &oldSigAct)) { 2212 // -1 means registration failed 2213 return (void *)-1; 2214 } 2215 2216 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2217} 2218 2219void os::signal_raise(int signal_number) { 2220 raise(signal_number); 2221} 2222 2223// The following code is moved from os.cpp for making this 2224// code platform specific, which it is by its very nature. 2225 2226// a counter for each possible signal value 2227static int Sigexit = 0; 2228static int Maxlibjsigsigs; 2229static jint *pending_signals = NULL; 2230static int *preinstalled_sigs = NULL; 2231static struct sigaction *chainedsigactions = NULL; 2232static sema_t sig_sem; 2233typedef int (*version_getting_t)(); 2234version_getting_t os::Solaris::get_libjsig_version = NULL; 2235static int libjsigversion = NULL; 2236 2237int os::sigexitnum_pd() { 2238 assert(Sigexit > 0, "signal memory not yet initialized"); 2239 return Sigexit; 2240} 2241 2242void os::Solaris::init_signal_mem() { 2243 // Initialize signal structures 2244 Maxsignum = SIGRTMAX; 2245 Sigexit = Maxsignum+1; 2246 assert(Maxsignum >0, "Unable to obtain max signal number"); 2247 2248 Maxlibjsigsigs = Maxsignum; 2249 2250 // pending_signals has one int per signal 2251 // The additional signal is for SIGEXIT - exit signal to signal_thread 2252 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2253 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2254 2255 if (UseSignalChaining) { 2256 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2257 * (Maxsignum + 1), mtInternal); 2258 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2259 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2260 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2261 } 2262 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2263 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2264} 2265 2266void os::signal_init_pd() { 2267 int ret; 2268 2269 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2270 assert(ret == 0, "sema_init() failed"); 2271} 2272 2273void os::signal_notify(int signal_number) { 2274 int ret; 2275 2276 Atomic::inc(&pending_signals[signal_number]); 2277 ret = ::sema_post(&sig_sem); 2278 assert(ret == 0, "sema_post() failed"); 2279} 2280 2281static int check_pending_signals(bool wait_for_signal) { 2282 int ret; 2283 while (true) { 2284 for (int i = 0; i < Sigexit + 1; i++) { 2285 jint n = pending_signals[i]; 2286 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2287 return i; 2288 } 2289 } 2290 if (!wait_for_signal) { 2291 return -1; 2292 } 2293 JavaThread *thread = JavaThread::current(); 2294 ThreadBlockInVM tbivm(thread); 2295 2296 bool threadIsSuspended; 2297 do { 2298 thread->set_suspend_equivalent(); 2299 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2300 while ((ret = ::sema_wait(&sig_sem)) == EINTR) 2301 ; 2302 assert(ret == 0, "sema_wait() failed"); 2303 2304 // were we externally suspended while we were waiting? 2305 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2306 if (threadIsSuspended) { 2307 // The semaphore has been incremented, but while we were waiting 2308 // another thread suspended us. We don't want to continue running 2309 // while suspended because that would surprise the thread that 2310 // suspended us. 2311 ret = ::sema_post(&sig_sem); 2312 assert(ret == 0, "sema_post() failed"); 2313 2314 thread->java_suspend_self(); 2315 } 2316 } while (threadIsSuspended); 2317 } 2318} 2319 2320int os::signal_lookup() { 2321 return check_pending_signals(false); 2322} 2323 2324int os::signal_wait() { 2325 return check_pending_signals(true); 2326} 2327 2328//////////////////////////////////////////////////////////////////////////////// 2329// Virtual Memory 2330 2331static int page_size = -1; 2332 2333// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2334// clear this var if support is not available. 2335static bool has_map_align = true; 2336 2337int os::vm_page_size() { 2338 assert(page_size != -1, "must call os::init"); 2339 return page_size; 2340} 2341 2342// Solaris allocates memory by pages. 2343int os::vm_allocation_granularity() { 2344 assert(page_size != -1, "must call os::init"); 2345 return page_size; 2346} 2347 2348static bool recoverable_mmap_error(int err) { 2349 // See if the error is one we can let the caller handle. This 2350 // list of errno values comes from the Solaris mmap(2) man page. 2351 switch (err) { 2352 case EBADF: 2353 case EINVAL: 2354 case ENOTSUP: 2355 // let the caller deal with these errors 2356 return true; 2357 2358 default: 2359 // Any remaining errors on this OS can cause our reserved mapping 2360 // to be lost. That can cause confusion where different data 2361 // structures think they have the same memory mapped. The worst 2362 // scenario is if both the VM and a library think they have the 2363 // same memory mapped. 2364 return false; 2365 } 2366} 2367 2368static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2369 int err) { 2370 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2371 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2372 os::strerror(err), err); 2373} 2374 2375static void warn_fail_commit_memory(char* addr, size_t bytes, 2376 size_t alignment_hint, bool exec, 2377 int err) { 2378 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2379 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2380 alignment_hint, exec, os::strerror(err), err); 2381} 2382 2383int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2384 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2385 size_t size = bytes; 2386 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2387 if (res != NULL) { 2388 if (UseNUMAInterleaving) { 2389 numa_make_global(addr, bytes); 2390 } 2391 return 0; 2392 } 2393 2394 int err = errno; // save errno from mmap() call in mmap_chunk() 2395 2396 if (!recoverable_mmap_error(err)) { 2397 warn_fail_commit_memory(addr, bytes, exec, err); 2398 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2399 } 2400 2401 return err; 2402} 2403 2404bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2405 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2406} 2407 2408void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2409 const char* mesg) { 2410 assert(mesg != NULL, "mesg must be specified"); 2411 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2412 if (err != 0) { 2413 // the caller wants all commit errors to exit with the specified mesg: 2414 warn_fail_commit_memory(addr, bytes, exec, err); 2415 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2416 } 2417} 2418 2419size_t os::Solaris::page_size_for_alignment(size_t alignment) { 2420 assert(is_size_aligned(alignment, (size_t) vm_page_size()), 2421 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, 2422 alignment, (size_t) vm_page_size()); 2423 2424 for (int i = 0; _page_sizes[i] != 0; i++) { 2425 if (is_size_aligned(alignment, _page_sizes[i])) { 2426 return _page_sizes[i]; 2427 } 2428 } 2429 2430 return (size_t) vm_page_size(); 2431} 2432 2433int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2434 size_t alignment_hint, bool exec) { 2435 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2436 if (err == 0 && UseLargePages && alignment_hint > 0) { 2437 assert(is_size_aligned(bytes, alignment_hint), 2438 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint); 2439 2440 // The syscall memcntl requires an exact page size (see man memcntl for details). 2441 size_t page_size = page_size_for_alignment(alignment_hint); 2442 if (page_size > (size_t) vm_page_size()) { 2443 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2444 } 2445 } 2446 return err; 2447} 2448 2449bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2450 bool exec) { 2451 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2452} 2453 2454void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2455 size_t alignment_hint, bool exec, 2456 const char* mesg) { 2457 assert(mesg != NULL, "mesg must be specified"); 2458 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2459 if (err != 0) { 2460 // the caller wants all commit errors to exit with the specified mesg: 2461 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2462 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2463 } 2464} 2465 2466// Uncommit the pages in a specified region. 2467void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2468 if (madvise(addr, bytes, MADV_FREE) < 0) { 2469 debug_only(warning("MADV_FREE failed.")); 2470 return; 2471 } 2472} 2473 2474bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2475 return os::commit_memory(addr, size, !ExecMem); 2476} 2477 2478bool os::remove_stack_guard_pages(char* addr, size_t size) { 2479 return os::uncommit_memory(addr, size); 2480} 2481 2482// Change the page size in a given range. 2483void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2484 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2485 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2486 if (UseLargePages) { 2487 size_t page_size = Solaris::page_size_for_alignment(alignment_hint); 2488 if (page_size > (size_t) vm_page_size()) { 2489 Solaris::setup_large_pages(addr, bytes, page_size); 2490 } 2491 } 2492} 2493 2494// Tell the OS to make the range local to the first-touching LWP 2495void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2496 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2497 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2498 debug_only(warning("MADV_ACCESS_LWP failed.")); 2499 } 2500} 2501 2502// Tell the OS that this range would be accessed from different LWPs. 2503void os::numa_make_global(char *addr, size_t bytes) { 2504 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2505 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2506 debug_only(warning("MADV_ACCESS_MANY failed.")); 2507 } 2508} 2509 2510// Get the number of the locality groups. 2511size_t os::numa_get_groups_num() { 2512 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2513 return n != -1 ? n : 1; 2514} 2515 2516// Get a list of leaf locality groups. A leaf lgroup is group that 2517// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2518// board. An LWP is assigned to one of these groups upon creation. 2519size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2520 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2521 ids[0] = 0; 2522 return 1; 2523 } 2524 int result_size = 0, top = 1, bottom = 0, cur = 0; 2525 for (int k = 0; k < size; k++) { 2526 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2527 (Solaris::lgrp_id_t*)&ids[top], size - top); 2528 if (r == -1) { 2529 ids[0] = 0; 2530 return 1; 2531 } 2532 if (!r) { 2533 // That's a leaf node. 2534 assert(bottom <= cur, "Sanity check"); 2535 // Check if the node has memory 2536 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2537 NULL, 0, LGRP_RSRC_MEM) > 0) { 2538 ids[bottom++] = ids[cur]; 2539 } 2540 } 2541 top += r; 2542 cur++; 2543 } 2544 if (bottom == 0) { 2545 // Handle a situation, when the OS reports no memory available. 2546 // Assume UMA architecture. 2547 ids[0] = 0; 2548 return 1; 2549 } 2550 return bottom; 2551} 2552 2553// Detect the topology change. Typically happens during CPU plugging-unplugging. 2554bool os::numa_topology_changed() { 2555 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2556 if (is_stale != -1 && is_stale) { 2557 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2558 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2559 assert(c != 0, "Failure to initialize LGRP API"); 2560 Solaris::set_lgrp_cookie(c); 2561 return true; 2562 } 2563 return false; 2564} 2565 2566// Get the group id of the current LWP. 2567int os::numa_get_group_id() { 2568 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2569 if (lgrp_id == -1) { 2570 return 0; 2571 } 2572 const int size = os::numa_get_groups_num(); 2573 int *ids = (int*)alloca(size * sizeof(int)); 2574 2575 // Get the ids of all lgroups with memory; r is the count. 2576 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2577 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2578 if (r <= 0) { 2579 return 0; 2580 } 2581 return ids[os::random() % r]; 2582} 2583 2584// Request information about the page. 2585bool os::get_page_info(char *start, page_info* info) { 2586 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2587 uint64_t addr = (uintptr_t)start; 2588 uint64_t outdata[2]; 2589 uint_t validity = 0; 2590 2591 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2592 return false; 2593 } 2594 2595 info->size = 0; 2596 info->lgrp_id = -1; 2597 2598 if ((validity & 1) != 0) { 2599 if ((validity & 2) != 0) { 2600 info->lgrp_id = outdata[0]; 2601 } 2602 if ((validity & 4) != 0) { 2603 info->size = outdata[1]; 2604 } 2605 return true; 2606 } 2607 return false; 2608} 2609 2610// Scan the pages from start to end until a page different than 2611// the one described in the info parameter is encountered. 2612char *os::scan_pages(char *start, char* end, page_info* page_expected, 2613 page_info* page_found) { 2614 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2615 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2616 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1]; 2617 uint_t validity[MAX_MEMINFO_CNT]; 2618 2619 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2620 uint64_t p = (uint64_t)start; 2621 while (p < (uint64_t)end) { 2622 addrs[0] = p; 2623 size_t addrs_count = 1; 2624 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2625 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2626 addrs_count++; 2627 } 2628 2629 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2630 return NULL; 2631 } 2632 2633 size_t i = 0; 2634 for (; i < addrs_count; i++) { 2635 if ((validity[i] & 1) != 0) { 2636 if ((validity[i] & 4) != 0) { 2637 if (outdata[types * i + 1] != page_expected->size) { 2638 break; 2639 } 2640 } else if (page_expected->size != 0) { 2641 break; 2642 } 2643 2644 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2645 if (outdata[types * i] != page_expected->lgrp_id) { 2646 break; 2647 } 2648 } 2649 } else { 2650 return NULL; 2651 } 2652 } 2653 2654 if (i < addrs_count) { 2655 if ((validity[i] & 2) != 0) { 2656 page_found->lgrp_id = outdata[types * i]; 2657 } else { 2658 page_found->lgrp_id = -1; 2659 } 2660 if ((validity[i] & 4) != 0) { 2661 page_found->size = outdata[types * i + 1]; 2662 } else { 2663 page_found->size = 0; 2664 } 2665 return (char*)addrs[i]; 2666 } 2667 2668 p = addrs[addrs_count - 1] + page_size; 2669 } 2670 return end; 2671} 2672 2673bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2674 size_t size = bytes; 2675 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2676 // uncommitted page. Otherwise, the read/write might succeed if we 2677 // have enough swap space to back the physical page. 2678 return 2679 NULL != Solaris::mmap_chunk(addr, size, 2680 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2681 PROT_NONE); 2682} 2683 2684char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2685 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2686 2687 if (b == MAP_FAILED) { 2688 return NULL; 2689 } 2690 return b; 2691} 2692 2693char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, 2694 size_t alignment_hint, bool fixed) { 2695 char* addr = requested_addr; 2696 int flags = MAP_PRIVATE | MAP_NORESERVE; 2697 2698 assert(!(fixed && (alignment_hint > 0)), 2699 "alignment hint meaningless with fixed mmap"); 2700 2701 if (fixed) { 2702 flags |= MAP_FIXED; 2703 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2704 flags |= MAP_ALIGN; 2705 addr = (char*) alignment_hint; 2706 } 2707 2708 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2709 // uncommitted page. Otherwise, the read/write might succeed if we 2710 // have enough swap space to back the physical page. 2711 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2712} 2713 2714char* os::pd_reserve_memory(size_t bytes, char* requested_addr, 2715 size_t alignment_hint) { 2716 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, 2717 (requested_addr != NULL)); 2718 2719 guarantee(requested_addr == NULL || requested_addr == addr, 2720 "OS failed to return requested mmap address."); 2721 return addr; 2722} 2723 2724// Reserve memory at an arbitrary address, only if that area is 2725// available (and not reserved for something else). 2726 2727char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2728 const int max_tries = 10; 2729 char* base[max_tries]; 2730 size_t size[max_tries]; 2731 2732 // Solaris adds a gap between mmap'ed regions. The size of the gap 2733 // is dependent on the requested size and the MMU. Our initial gap 2734 // value here is just a guess and will be corrected later. 2735 bool had_top_overlap = false; 2736 bool have_adjusted_gap = false; 2737 size_t gap = 0x400000; 2738 2739 // Assert only that the size is a multiple of the page size, since 2740 // that's all that mmap requires, and since that's all we really know 2741 // about at this low abstraction level. If we need higher alignment, 2742 // we can either pass an alignment to this method or verify alignment 2743 // in one of the methods further up the call chain. See bug 5044738. 2744 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2745 2746 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2747 // Give it a try, if the kernel honors the hint we can return immediately. 2748 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2749 2750 volatile int err = errno; 2751 if (addr == requested_addr) { 2752 return addr; 2753 } else if (addr != NULL) { 2754 pd_unmap_memory(addr, bytes); 2755 } 2756 2757 if (PrintMiscellaneous && Verbose) { 2758 char buf[256]; 2759 buf[0] = '\0'; 2760 if (addr == NULL) { 2761 jio_snprintf(buf, sizeof(buf), ": %s", os::strerror(err)); 2762 } 2763 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 2764 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2765 "%s", bytes, requested_addr, addr, buf); 2766 } 2767 2768 // Address hint method didn't work. Fall back to the old method. 2769 // In theory, once SNV becomes our oldest supported platform, this 2770 // code will no longer be needed. 2771 // 2772 // Repeatedly allocate blocks until the block is allocated at the 2773 // right spot. Give up after max_tries. 2774 int i; 2775 for (i = 0; i < max_tries; ++i) { 2776 base[i] = reserve_memory(bytes); 2777 2778 if (base[i] != NULL) { 2779 // Is this the block we wanted? 2780 if (base[i] == requested_addr) { 2781 size[i] = bytes; 2782 break; 2783 } 2784 2785 // check that the gap value is right 2786 if (had_top_overlap && !have_adjusted_gap) { 2787 size_t actual_gap = base[i-1] - base[i] - bytes; 2788 if (gap != actual_gap) { 2789 // adjust the gap value and retry the last 2 allocations 2790 assert(i > 0, "gap adjustment code problem"); 2791 have_adjusted_gap = true; // adjust the gap only once, just in case 2792 gap = actual_gap; 2793 if (PrintMiscellaneous && Verbose) { 2794 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2795 } 2796 unmap_memory(base[i], bytes); 2797 unmap_memory(base[i-1], size[i-1]); 2798 i-=2; 2799 continue; 2800 } 2801 } 2802 2803 // Does this overlap the block we wanted? Give back the overlapped 2804 // parts and try again. 2805 // 2806 // There is still a bug in this code: if top_overlap == bytes, 2807 // the overlap is offset from requested region by the value of gap. 2808 // In this case giving back the overlapped part will not work, 2809 // because we'll give back the entire block at base[i] and 2810 // therefore the subsequent allocation will not generate a new gap. 2811 // This could be fixed with a new algorithm that used larger 2812 // or variable size chunks to find the requested region - 2813 // but such a change would introduce additional complications. 2814 // It's rare enough that the planets align for this bug, 2815 // so we'll just wait for a fix for 6204603/5003415 which 2816 // will provide a mmap flag to allow us to avoid this business. 2817 2818 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2819 if (top_overlap >= 0 && top_overlap < bytes) { 2820 had_top_overlap = true; 2821 unmap_memory(base[i], top_overlap); 2822 base[i] += top_overlap; 2823 size[i] = bytes - top_overlap; 2824 } else { 2825 size_t bottom_overlap = base[i] + bytes - requested_addr; 2826 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2827 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2828 warning("attempt_reserve_memory_at: possible alignment bug"); 2829 } 2830 unmap_memory(requested_addr, bottom_overlap); 2831 size[i] = bytes - bottom_overlap; 2832 } else { 2833 size[i] = bytes; 2834 } 2835 } 2836 } 2837 } 2838 2839 // Give back the unused reserved pieces. 2840 2841 for (int j = 0; j < i; ++j) { 2842 if (base[j] != NULL) { 2843 unmap_memory(base[j], size[j]); 2844 } 2845 } 2846 2847 return (i < max_tries) ? requested_addr : NULL; 2848} 2849 2850bool os::pd_release_memory(char* addr, size_t bytes) { 2851 size_t size = bytes; 2852 return munmap(addr, size) == 0; 2853} 2854 2855static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2856 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2857 "addr must be page aligned"); 2858 int retVal = mprotect(addr, bytes, prot); 2859 return retVal == 0; 2860} 2861 2862// Protect memory (Used to pass readonly pages through 2863// JNI GetArray<type>Elements with empty arrays.) 2864// Also, used for serialization page and for compressed oops null pointer 2865// checking. 2866bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2867 bool is_committed) { 2868 unsigned int p = 0; 2869 switch (prot) { 2870 case MEM_PROT_NONE: p = PROT_NONE; break; 2871 case MEM_PROT_READ: p = PROT_READ; break; 2872 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2873 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2874 default: 2875 ShouldNotReachHere(); 2876 } 2877 // is_committed is unused. 2878 return solaris_mprotect(addr, bytes, p); 2879} 2880 2881// guard_memory and unguard_memory only happens within stack guard pages. 2882// Since ISM pertains only to the heap, guard and unguard memory should not 2883/// happen with an ISM region. 2884bool os::guard_memory(char* addr, size_t bytes) { 2885 return solaris_mprotect(addr, bytes, PROT_NONE); 2886} 2887 2888bool os::unguard_memory(char* addr, size_t bytes) { 2889 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 2890} 2891 2892// Large page support 2893static size_t _large_page_size = 0; 2894 2895// Insertion sort for small arrays (descending order). 2896static void insertion_sort_descending(size_t* array, int len) { 2897 for (int i = 0; i < len; i++) { 2898 size_t val = array[i]; 2899 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 2900 size_t tmp = array[key]; 2901 array[key] = array[key - 1]; 2902 array[key - 1] = tmp; 2903 } 2904 } 2905} 2906 2907bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 2908 const unsigned int usable_count = VM_Version::page_size_count(); 2909 if (usable_count == 1) { 2910 return false; 2911 } 2912 2913 // Find the right getpagesizes interface. When solaris 11 is the minimum 2914 // build platform, getpagesizes() (without the '2') can be called directly. 2915 typedef int (*gps_t)(size_t[], int); 2916 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 2917 if (gps_func == NULL) { 2918 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 2919 if (gps_func == NULL) { 2920 if (warn) { 2921 warning("MPSS is not supported by the operating system."); 2922 } 2923 return false; 2924 } 2925 } 2926 2927 // Fill the array of page sizes. 2928 int n = (*gps_func)(_page_sizes, page_sizes_max); 2929 assert(n > 0, "Solaris bug?"); 2930 2931 if (n == page_sizes_max) { 2932 // Add a sentinel value (necessary only if the array was completely filled 2933 // since it is static (zeroed at initialization)). 2934 _page_sizes[--n] = 0; 2935 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 2936 } 2937 assert(_page_sizes[n] == 0, "missing sentinel"); 2938 trace_page_sizes("available page sizes", _page_sizes, n); 2939 2940 if (n == 1) return false; // Only one page size available. 2941 2942 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 2943 // select up to usable_count elements. First sort the array, find the first 2944 // acceptable value, then copy the usable sizes to the top of the array and 2945 // trim the rest. Make sure to include the default page size :-). 2946 // 2947 // A better policy could get rid of the 4M limit by taking the sizes of the 2948 // important VM memory regions (java heap and possibly the code cache) into 2949 // account. 2950 insertion_sort_descending(_page_sizes, n); 2951 const size_t size_limit = 2952 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 2953 int beg; 2954 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */; 2955 const int end = MIN2((int)usable_count, n) - 1; 2956 for (int cur = 0; cur < end; ++cur, ++beg) { 2957 _page_sizes[cur] = _page_sizes[beg]; 2958 } 2959 _page_sizes[end] = vm_page_size(); 2960 _page_sizes[end + 1] = 0; 2961 2962 if (_page_sizes[end] > _page_sizes[end - 1]) { 2963 // Default page size is not the smallest; sort again. 2964 insertion_sort_descending(_page_sizes, end + 1); 2965 } 2966 *page_size = _page_sizes[0]; 2967 2968 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 2969 return true; 2970} 2971 2972void os::large_page_init() { 2973 if (UseLargePages) { 2974 // print a warning if any large page related flag is specified on command line 2975 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 2976 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 2977 2978 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 2979 } 2980} 2981 2982bool os::Solaris::is_valid_page_size(size_t bytes) { 2983 for (int i = 0; _page_sizes[i] != 0; i++) { 2984 if (_page_sizes[i] == bytes) { 2985 return true; 2986 } 2987 } 2988 return false; 2989} 2990 2991bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 2992 assert(is_valid_page_size(align), SIZE_FORMAT " is not a valid page size", align); 2993 assert(is_ptr_aligned((void*) start, align), 2994 PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align); 2995 assert(is_size_aligned(bytes, align), 2996 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align); 2997 2998 // Signal to OS that we want large pages for addresses 2999 // from addr, addr + bytes 3000 struct memcntl_mha mpss_struct; 3001 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3002 mpss_struct.mha_pagesize = align; 3003 mpss_struct.mha_flags = 0; 3004 // Upon successful completion, memcntl() returns 0 3005 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 3006 debug_only(warning("Attempt to use MPSS failed.")); 3007 return false; 3008 } 3009 return true; 3010} 3011 3012char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 3013 fatal("os::reserve_memory_special should not be called on Solaris."); 3014 return NULL; 3015} 3016 3017bool os::release_memory_special(char* base, size_t bytes) { 3018 fatal("os::release_memory_special should not be called on Solaris."); 3019 return false; 3020} 3021 3022size_t os::large_page_size() { 3023 return _large_page_size; 3024} 3025 3026// MPSS allows application to commit large page memory on demand; with ISM 3027// the entire memory region must be allocated as shared memory. 3028bool os::can_commit_large_page_memory() { 3029 return true; 3030} 3031 3032bool os::can_execute_large_page_memory() { 3033 return true; 3034} 3035 3036// Read calls from inside the vm need to perform state transitions 3037size_t os::read(int fd, void *buf, unsigned int nBytes) { 3038 size_t res; 3039 JavaThread* thread = (JavaThread*)Thread::current(); 3040 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3041 ThreadBlockInVM tbiv(thread); 3042 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3043 return res; 3044} 3045 3046size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) { 3047 size_t res; 3048 JavaThread* thread = (JavaThread*)Thread::current(); 3049 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3050 ThreadBlockInVM tbiv(thread); 3051 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res); 3052 return res; 3053} 3054 3055size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3056 size_t res; 3057 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 3058 "Assumed _thread_in_native"); 3059 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3060 return res; 3061} 3062 3063void os::naked_short_sleep(jlong ms) { 3064 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 3065 3066 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 3067 // Solaris requires -lrt for this. 3068 usleep((ms * 1000)); 3069 3070 return; 3071} 3072 3073// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3074void os::infinite_sleep() { 3075 while (true) { // sleep forever ... 3076 ::sleep(100); // ... 100 seconds at a time 3077 } 3078} 3079 3080// Used to convert frequent JVM_Yield() to nops 3081bool os::dont_yield() { 3082 if (DontYieldALot) { 3083 static hrtime_t last_time = 0; 3084 hrtime_t diff = getTimeNanos() - last_time; 3085 3086 if (diff < DontYieldALotInterval * 1000000) { 3087 return true; 3088 } 3089 3090 last_time += diff; 3091 3092 return false; 3093 } else { 3094 return false; 3095 } 3096} 3097 3098// Note that yield semantics are defined by the scheduling class to which 3099// the thread currently belongs. Typically, yield will _not yield to 3100// other equal or higher priority threads that reside on the dispatch queues 3101// of other CPUs. 3102 3103void os::naked_yield() { 3104 thr_yield(); 3105} 3106 3107// Interface for setting lwp priorities. If we are using T2 libthread, 3108// which forces the use of BoundThreads or we manually set UseBoundThreads, 3109// all of our threads will be assigned to real lwp's. Using the thr_setprio 3110// function is meaningless in this mode so we must adjust the real lwp's priority 3111// The routines below implement the getting and setting of lwp priorities. 3112// 3113// Note: T2 is now the only supported libthread. UseBoundThreads flag is 3114// being deprecated and all threads are now BoundThreads 3115// 3116// Note: There are three priority scales used on Solaris. Java priotities 3117// which range from 1 to 10, libthread "thr_setprio" scale which range 3118// from 0 to 127, and the current scheduling class of the process we 3119// are running in. This is typically from -60 to +60. 3120// The setting of the lwp priorities in done after a call to thr_setprio 3121// so Java priorities are mapped to libthread priorities and we map from 3122// the latter to lwp priorities. We don't keep priorities stored in 3123// Java priorities since some of our worker threads want to set priorities 3124// higher than all Java threads. 3125// 3126// For related information: 3127// (1) man -s 2 priocntl 3128// (2) man -s 4 priocntl 3129// (3) man dispadmin 3130// = librt.so 3131// = libthread/common/rtsched.c - thrp_setlwpprio(). 3132// = ps -cL <pid> ... to validate priority. 3133// = sched_get_priority_min and _max 3134// pthread_create 3135// sched_setparam 3136// pthread_setschedparam 3137// 3138// Assumptions: 3139// + We assume that all threads in the process belong to the same 3140// scheduling class. IE. an homogenous process. 3141// + Must be root or in IA group to change change "interactive" attribute. 3142// Priocntl() will fail silently. The only indication of failure is when 3143// we read-back the value and notice that it hasn't changed. 3144// + Interactive threads enter the runq at the head, non-interactive at the tail. 3145// + For RT, change timeslice as well. Invariant: 3146// constant "priority integral" 3147// Konst == TimeSlice * (60-Priority) 3148// Given a priority, compute appropriate timeslice. 3149// + Higher numerical values have higher priority. 3150 3151// sched class attributes 3152typedef struct { 3153 int schedPolicy; // classID 3154 int maxPrio; 3155 int minPrio; 3156} SchedInfo; 3157 3158 3159static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3160 3161#ifdef ASSERT 3162static int ReadBackValidate = 1; 3163#endif 3164static int myClass = 0; 3165static int myMin = 0; 3166static int myMax = 0; 3167static int myCur = 0; 3168static bool priocntl_enable = false; 3169 3170static const int criticalPrio = FXCriticalPriority; 3171static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3172 3173 3174// lwp_priocntl_init 3175// 3176// Try to determine the priority scale for our process. 3177// 3178// Return errno or 0 if OK. 3179// 3180static int lwp_priocntl_init() { 3181 int rslt; 3182 pcinfo_t ClassInfo; 3183 pcparms_t ParmInfo; 3184 int i; 3185 3186 if (!UseThreadPriorities) return 0; 3187 3188 // If ThreadPriorityPolicy is 1, switch tables 3189 if (ThreadPriorityPolicy == 1) { 3190 for (i = 0; i < CriticalPriority+1; i++) 3191 os::java_to_os_priority[i] = prio_policy1[i]; 3192 } 3193 if (UseCriticalJavaThreadPriority) { 3194 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3195 // See set_native_priority() and set_lwp_class_and_priority(). 3196 // Save original MaxPriority mapping in case attempt to 3197 // use critical priority fails. 3198 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3199 // Set negative to distinguish from other priorities 3200 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3201 } 3202 3203 // Get IDs for a set of well-known scheduling classes. 3204 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3205 // the system. We should have a loop that iterates over the 3206 // classID values, which are known to be "small" integers. 3207 3208 strcpy(ClassInfo.pc_clname, "TS"); 3209 ClassInfo.pc_cid = -1; 3210 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3211 if (rslt < 0) return errno; 3212 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3213 tsLimits.schedPolicy = ClassInfo.pc_cid; 3214 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3215 tsLimits.minPrio = -tsLimits.maxPrio; 3216 3217 strcpy(ClassInfo.pc_clname, "IA"); 3218 ClassInfo.pc_cid = -1; 3219 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3220 if (rslt < 0) return errno; 3221 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3222 iaLimits.schedPolicy = ClassInfo.pc_cid; 3223 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3224 iaLimits.minPrio = -iaLimits.maxPrio; 3225 3226 strcpy(ClassInfo.pc_clname, "RT"); 3227 ClassInfo.pc_cid = -1; 3228 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3229 if (rslt < 0) return errno; 3230 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3231 rtLimits.schedPolicy = ClassInfo.pc_cid; 3232 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3233 rtLimits.minPrio = 0; 3234 3235 strcpy(ClassInfo.pc_clname, "FX"); 3236 ClassInfo.pc_cid = -1; 3237 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3238 if (rslt < 0) return errno; 3239 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3240 fxLimits.schedPolicy = ClassInfo.pc_cid; 3241 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3242 fxLimits.minPrio = 0; 3243 3244 // Query our "current" scheduling class. 3245 // This will normally be IA, TS or, rarely, FX or RT. 3246 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3247 ParmInfo.pc_cid = PC_CLNULL; 3248 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3249 if (rslt < 0) return errno; 3250 myClass = ParmInfo.pc_cid; 3251 3252 // We now know our scheduling classId, get specific information 3253 // about the class. 3254 ClassInfo.pc_cid = myClass; 3255 ClassInfo.pc_clname[0] = 0; 3256 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3257 if (rslt < 0) return errno; 3258 3259 if (ThreadPriorityVerbose) { 3260 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3261 } 3262 3263 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3264 ParmInfo.pc_cid = PC_CLNULL; 3265 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3266 if (rslt < 0) return errno; 3267 3268 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3269 myMin = rtLimits.minPrio; 3270 myMax = rtLimits.maxPrio; 3271 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3272 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3273 myMin = iaLimits.minPrio; 3274 myMax = iaLimits.maxPrio; 3275 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3276 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3277 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3278 myMin = tsLimits.minPrio; 3279 myMax = tsLimits.maxPrio; 3280 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3281 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3282 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3283 myMin = fxLimits.minPrio; 3284 myMax = fxLimits.maxPrio; 3285 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3286 } else { 3287 // No clue - punt 3288 if (ThreadPriorityVerbose) { 3289 tty->print_cr("Unknown scheduling class: %s ... \n", 3290 ClassInfo.pc_clname); 3291 } 3292 return EINVAL; // no clue, punt 3293 } 3294 3295 if (ThreadPriorityVerbose) { 3296 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax); 3297 } 3298 3299 priocntl_enable = true; // Enable changing priorities 3300 return 0; 3301} 3302 3303#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3304#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3305#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3306#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3307 3308 3309// scale_to_lwp_priority 3310// 3311// Convert from the libthread "thr_setprio" scale to our current 3312// lwp scheduling class scale. 3313// 3314static int scale_to_lwp_priority(int rMin, int rMax, int x) { 3315 int v; 3316 3317 if (x == 127) return rMax; // avoid round-down 3318 v = (((x*(rMax-rMin)))/128)+rMin; 3319 return v; 3320} 3321 3322 3323// set_lwp_class_and_priority 3324int set_lwp_class_and_priority(int ThreadID, int lwpid, 3325 int newPrio, int new_class, bool scale) { 3326 int rslt; 3327 int Actual, Expected, prv; 3328 pcparms_t ParmInfo; // for GET-SET 3329#ifdef ASSERT 3330 pcparms_t ReadBack; // for readback 3331#endif 3332 3333 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3334 // Query current values. 3335 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3336 // Cache "pcparms_t" in global ParmCache. 3337 // TODO: elide set-to-same-value 3338 3339 // If something went wrong on init, don't change priorities. 3340 if (!priocntl_enable) { 3341 if (ThreadPriorityVerbose) { 3342 tty->print_cr("Trying to set priority but init failed, ignoring"); 3343 } 3344 return EINVAL; 3345 } 3346 3347 // If lwp hasn't started yet, just return 3348 // the _start routine will call us again. 3349 if (lwpid <= 0) { 3350 if (ThreadPriorityVerbose) { 3351 tty->print_cr("deferring the set_lwp_class_and_priority of thread " 3352 INTPTR_FORMAT " to %d, lwpid not set", 3353 ThreadID, newPrio); 3354 } 3355 return 0; 3356 } 3357 3358 if (ThreadPriorityVerbose) { 3359 tty->print_cr ("set_lwp_class_and_priority(" 3360 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3361 ThreadID, lwpid, newPrio); 3362 } 3363 3364 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3365 ParmInfo.pc_cid = PC_CLNULL; 3366 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3367 if (rslt < 0) return errno; 3368 3369 int cur_class = ParmInfo.pc_cid; 3370 ParmInfo.pc_cid = (id_t)new_class; 3371 3372 if (new_class == rtLimits.schedPolicy) { 3373 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3374 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3375 rtLimits.maxPrio, newPrio) 3376 : newPrio; 3377 rtInfo->rt_tqsecs = RT_NOCHANGE; 3378 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3379 if (ThreadPriorityVerbose) { 3380 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3381 } 3382 } else if (new_class == iaLimits.schedPolicy) { 3383 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3384 int maxClamped = MIN2(iaLimits.maxPrio, 3385 cur_class == new_class 3386 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3387 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3388 maxClamped, newPrio) 3389 : newPrio; 3390 iaInfo->ia_uprilim = cur_class == new_class 3391 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3392 iaInfo->ia_mode = IA_NOCHANGE; 3393 if (ThreadPriorityVerbose) { 3394 tty->print_cr("IA: [%d...%d] %d->%d\n", 3395 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3396 } 3397 } else if (new_class == tsLimits.schedPolicy) { 3398 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3399 int maxClamped = MIN2(tsLimits.maxPrio, 3400 cur_class == new_class 3401 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3402 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3403 maxClamped, newPrio) 3404 : newPrio; 3405 tsInfo->ts_uprilim = cur_class == new_class 3406 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3407 if (ThreadPriorityVerbose) { 3408 tty->print_cr("TS: [%d...%d] %d->%d\n", 3409 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3410 } 3411 } else if (new_class == fxLimits.schedPolicy) { 3412 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3413 int maxClamped = MIN2(fxLimits.maxPrio, 3414 cur_class == new_class 3415 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3416 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3417 maxClamped, newPrio) 3418 : newPrio; 3419 fxInfo->fx_uprilim = cur_class == new_class 3420 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3421 fxInfo->fx_tqsecs = FX_NOCHANGE; 3422 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3423 if (ThreadPriorityVerbose) { 3424 tty->print_cr("FX: [%d...%d] %d->%d\n", 3425 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3426 } 3427 } else { 3428 if (ThreadPriorityVerbose) { 3429 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3430 } 3431 return EINVAL; // no clue, punt 3432 } 3433 3434 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3435 if (ThreadPriorityVerbose && rslt) { 3436 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3437 } 3438 if (rslt < 0) return errno; 3439 3440#ifdef ASSERT 3441 // Sanity check: read back what we just attempted to set. 3442 // In theory it could have changed in the interim ... 3443 // 3444 // The priocntl system call is tricky. 3445 // Sometimes it'll validate the priority value argument and 3446 // return EINVAL if unhappy. At other times it fails silently. 3447 // Readbacks are prudent. 3448 3449 if (!ReadBackValidate) return 0; 3450 3451 memset(&ReadBack, 0, sizeof(pcparms_t)); 3452 ReadBack.pc_cid = PC_CLNULL; 3453 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3454 assert(rslt >= 0, "priocntl failed"); 3455 Actual = Expected = 0xBAD; 3456 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3457 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3458 Actual = RTPRI(ReadBack)->rt_pri; 3459 Expected = RTPRI(ParmInfo)->rt_pri; 3460 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3461 Actual = IAPRI(ReadBack)->ia_upri; 3462 Expected = IAPRI(ParmInfo)->ia_upri; 3463 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3464 Actual = TSPRI(ReadBack)->ts_upri; 3465 Expected = TSPRI(ParmInfo)->ts_upri; 3466 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3467 Actual = FXPRI(ReadBack)->fx_upri; 3468 Expected = FXPRI(ParmInfo)->fx_upri; 3469 } else { 3470 if (ThreadPriorityVerbose) { 3471 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 3472 ParmInfo.pc_cid); 3473 } 3474 } 3475 3476 if (Actual != Expected) { 3477 if (ThreadPriorityVerbose) { 3478 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3479 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3480 } 3481 } 3482#endif 3483 3484 return 0; 3485} 3486 3487// Solaris only gives access to 128 real priorities at a time, 3488// so we expand Java's ten to fill this range. This would be better 3489// if we dynamically adjusted relative priorities. 3490// 3491// The ThreadPriorityPolicy option allows us to select 2 different 3492// priority scales. 3493// 3494// ThreadPriorityPolicy=0 3495// Since the Solaris' default priority is MaximumPriority, we do not 3496// set a priority lower than Max unless a priority lower than 3497// NormPriority is requested. 3498// 3499// ThreadPriorityPolicy=1 3500// This mode causes the priority table to get filled with 3501// linear values. NormPriority get's mapped to 50% of the 3502// Maximum priority an so on. This will cause VM threads 3503// to get unfair treatment against other Solaris processes 3504// which do not explicitly alter their thread priorities. 3505 3506int os::java_to_os_priority[CriticalPriority + 1] = { 3507 -99999, // 0 Entry should never be used 3508 3509 0, // 1 MinPriority 3510 32, // 2 3511 64, // 3 3512 3513 96, // 4 3514 127, // 5 NormPriority 3515 127, // 6 3516 3517 127, // 7 3518 127, // 8 3519 127, // 9 NearMaxPriority 3520 3521 127, // 10 MaxPriority 3522 3523 -criticalPrio // 11 CriticalPriority 3524}; 3525 3526OSReturn os::set_native_priority(Thread* thread, int newpri) { 3527 OSThread* osthread = thread->osthread(); 3528 3529 // Save requested priority in case the thread hasn't been started 3530 osthread->set_native_priority(newpri); 3531 3532 // Check for critical priority request 3533 bool fxcritical = false; 3534 if (newpri == -criticalPrio) { 3535 fxcritical = true; 3536 newpri = criticalPrio; 3537 } 3538 3539 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3540 if (!UseThreadPriorities) return OS_OK; 3541 3542 int status = 0; 3543 3544 if (!fxcritical) { 3545 // Use thr_setprio only if we have a priority that thr_setprio understands 3546 status = thr_setprio(thread->osthread()->thread_id(), newpri); 3547 } 3548 3549 int lwp_status = 3550 set_lwp_class_and_priority(osthread->thread_id(), 3551 osthread->lwp_id(), 3552 newpri, 3553 fxcritical ? fxLimits.schedPolicy : myClass, 3554 !fxcritical); 3555 if (lwp_status != 0 && fxcritical) { 3556 // Try again, this time without changing the scheduling class 3557 newpri = java_MaxPriority_to_os_priority; 3558 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 3559 osthread->lwp_id(), 3560 newpri, myClass, false); 3561 } 3562 status |= lwp_status; 3563 return (status == 0) ? OS_OK : OS_ERR; 3564} 3565 3566 3567OSReturn os::get_native_priority(const Thread* const thread, 3568 int *priority_ptr) { 3569 int p; 3570 if (!UseThreadPriorities) { 3571 *priority_ptr = NormalPriority; 3572 return OS_OK; 3573 } 3574 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3575 if (status != 0) { 3576 return OS_ERR; 3577 } 3578 *priority_ptr = p; 3579 return OS_OK; 3580} 3581 3582 3583// Hint to the underlying OS that a task switch would not be good. 3584// Void return because it's a hint and can fail. 3585void os::hint_no_preempt() { 3586 schedctl_start(schedctl_init()); 3587} 3588 3589static void resume_clear_context(OSThread *osthread) { 3590 osthread->set_ucontext(NULL); 3591} 3592 3593static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 3594 osthread->set_ucontext(context); 3595} 3596 3597static PosixSemaphore sr_semaphore; 3598 3599void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) { 3600 // Save and restore errno to avoid confusing native code with EINTR 3601 // after sigsuspend. 3602 int old_errno = errno; 3603 3604 OSThread* osthread = thread->osthread(); 3605 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 3606 3607 os::SuspendResume::State current = osthread->sr.state(); 3608 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 3609 suspend_save_context(osthread, uc); 3610 3611 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 3612 os::SuspendResume::State state = osthread->sr.suspended(); 3613 if (state == os::SuspendResume::SR_SUSPENDED) { 3614 sigset_t suspend_set; // signals for sigsuspend() 3615 3616 // get current set of blocked signals and unblock resume signal 3617 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); 3618 sigdelset(&suspend_set, os::Solaris::SIGasync()); 3619 3620 sr_semaphore.signal(); 3621 // wait here until we are resumed 3622 while (1) { 3623 sigsuspend(&suspend_set); 3624 3625 os::SuspendResume::State result = osthread->sr.running(); 3626 if (result == os::SuspendResume::SR_RUNNING) { 3627 sr_semaphore.signal(); 3628 break; 3629 } 3630 } 3631 3632 } else if (state == os::SuspendResume::SR_RUNNING) { 3633 // request was cancelled, continue 3634 } else { 3635 ShouldNotReachHere(); 3636 } 3637 3638 resume_clear_context(osthread); 3639 } else if (current == os::SuspendResume::SR_RUNNING) { 3640 // request was cancelled, continue 3641 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 3642 // ignore 3643 } else { 3644 // ignore 3645 } 3646 3647 errno = old_errno; 3648} 3649 3650void os::print_statistics() { 3651} 3652 3653bool os::message_box(const char* title, const char* message) { 3654 int i; 3655 fdStream err(defaultStream::error_fd()); 3656 for (i = 0; i < 78; i++) err.print_raw("="); 3657 err.cr(); 3658 err.print_raw_cr(title); 3659 for (i = 0; i < 78; i++) err.print_raw("-"); 3660 err.cr(); 3661 err.print_raw_cr(message); 3662 for (i = 0; i < 78; i++) err.print_raw("="); 3663 err.cr(); 3664 3665 char buf[16]; 3666 // Prevent process from exiting upon "read error" without consuming all CPU 3667 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3668 3669 return buf[0] == 'y' || buf[0] == 'Y'; 3670} 3671 3672static int sr_notify(OSThread* osthread) { 3673 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync()); 3674 assert_status(status == 0, status, "thr_kill"); 3675 return status; 3676} 3677 3678// "Randomly" selected value for how long we want to spin 3679// before bailing out on suspending a thread, also how often 3680// we send a signal to a thread we want to resume 3681static const int RANDOMLY_LARGE_INTEGER = 1000000; 3682static const int RANDOMLY_LARGE_INTEGER2 = 100; 3683 3684static bool do_suspend(OSThread* osthread) { 3685 assert(osthread->sr.is_running(), "thread should be running"); 3686 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 3687 3688 // mark as suspended and send signal 3689 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 3690 // failed to switch, state wasn't running? 3691 ShouldNotReachHere(); 3692 return false; 3693 } 3694 3695 if (sr_notify(osthread) != 0) { 3696 ShouldNotReachHere(); 3697 } 3698 3699 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 3700 while (true) { 3701 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) { 3702 break; 3703 } else { 3704 // timeout 3705 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 3706 if (cancelled == os::SuspendResume::SR_RUNNING) { 3707 return false; 3708 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 3709 // make sure that we consume the signal on the semaphore as well 3710 sr_semaphore.wait(); 3711 break; 3712 } else { 3713 ShouldNotReachHere(); 3714 return false; 3715 } 3716 } 3717 } 3718 3719 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 3720 return true; 3721} 3722 3723static void do_resume(OSThread* osthread) { 3724 assert(osthread->sr.is_suspended(), "thread should be suspended"); 3725 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 3726 3727 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 3728 // failed to switch to WAKEUP_REQUEST 3729 ShouldNotReachHere(); 3730 return; 3731 } 3732 3733 while (true) { 3734 if (sr_notify(osthread) == 0) { 3735 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { 3736 if (osthread->sr.is_running()) { 3737 return; 3738 } 3739 } 3740 } else { 3741 ShouldNotReachHere(); 3742 } 3743 } 3744 3745 guarantee(osthread->sr.is_running(), "Must be running!"); 3746} 3747 3748void os::SuspendedThreadTask::internal_do_task() { 3749 if (do_suspend(_thread->osthread())) { 3750 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 3751 do_task(context); 3752 do_resume(_thread->osthread()); 3753 } 3754} 3755 3756class PcFetcher : public os::SuspendedThreadTask { 3757 public: 3758 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} 3759 ExtendedPC result(); 3760 protected: 3761 void do_task(const os::SuspendedThreadTaskContext& context); 3762 private: 3763 ExtendedPC _epc; 3764}; 3765 3766ExtendedPC PcFetcher::result() { 3767 guarantee(is_done(), "task is not done yet."); 3768 return _epc; 3769} 3770 3771void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { 3772 Thread* thread = context.thread(); 3773 OSThread* osthread = thread->osthread(); 3774 if (osthread->ucontext() != NULL) { 3775 _epc = os::Solaris::ucontext_get_pc((const ucontext_t *) context.ucontext()); 3776 } else { 3777 // NULL context is unexpected, double-check this is the VMThread 3778 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); 3779 } 3780} 3781 3782// A lightweight implementation that does not suspend the target thread and 3783// thus returns only a hint. Used for profiling only! 3784ExtendedPC os::get_thread_pc(Thread* thread) { 3785 // Make sure that it is called by the watcher and the Threads lock is owned. 3786 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3787 // For now, is only used to profile the VM Thread 3788 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3789 PcFetcher fetcher(thread); 3790 fetcher.run(); 3791 return fetcher.result(); 3792} 3793 3794 3795// This does not do anything on Solaris. This is basically a hook for being 3796// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3797void os::os_exception_wrapper(java_call_t f, JavaValue* value, 3798 const methodHandle& method, JavaCallArguments* args, 3799 Thread* thread) { 3800 f(value, method, args, thread); 3801} 3802 3803// This routine may be used by user applications as a "hook" to catch signals. 3804// The user-defined signal handler must pass unrecognized signals to this 3805// routine, and if it returns true (non-zero), then the signal handler must 3806// return immediately. If the flag "abort_if_unrecognized" is true, then this 3807// routine will never retun false (zero), but instead will execute a VM panic 3808// routine kill the process. 3809// 3810// If this routine returns false, it is OK to call it again. This allows 3811// the user-defined signal handler to perform checks either before or after 3812// the VM performs its own checks. Naturally, the user code would be making 3813// a serious error if it tried to handle an exception (such as a null check 3814// or breakpoint) that the VM was generating for its own correct operation. 3815// 3816// This routine may recognize any of the following kinds of signals: 3817// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3818// os::Solaris::SIGasync 3819// It should be consulted by handlers for any of those signals. 3820// 3821// The caller of this routine must pass in the three arguments supplied 3822// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3823// field of the structure passed to sigaction(). This routine assumes that 3824// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3825// 3826// Note that the VM will print warnings if it detects conflicting signal 3827// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3828// 3829extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo, 3830 siginfo_t* siginfo, 3831 void* ucontext, 3832 int abort_if_unrecognized); 3833 3834 3835void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3836 int orig_errno = errno; // Preserve errno value over signal handler. 3837 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3838 errno = orig_errno; 3839} 3840 3841// This boolean allows users to forward their own non-matching signals 3842// to JVM_handle_solaris_signal, harmlessly. 3843bool os::Solaris::signal_handlers_are_installed = false; 3844 3845// For signal-chaining 3846bool os::Solaris::libjsig_is_loaded = false; 3847typedef struct sigaction *(*get_signal_t)(int); 3848get_signal_t os::Solaris::get_signal_action = NULL; 3849 3850struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3851 struct sigaction *actp = NULL; 3852 3853 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 3854 // Retrieve the old signal handler from libjsig 3855 actp = (*get_signal_action)(sig); 3856 } 3857 if (actp == NULL) { 3858 // Retrieve the preinstalled signal handler from jvm 3859 actp = get_preinstalled_handler(sig); 3860 } 3861 3862 return actp; 3863} 3864 3865static bool call_chained_handler(struct sigaction *actp, int sig, 3866 siginfo_t *siginfo, void *context) { 3867 // Call the old signal handler 3868 if (actp->sa_handler == SIG_DFL) { 3869 // It's more reasonable to let jvm treat it as an unexpected exception 3870 // instead of taking the default action. 3871 return false; 3872 } else if (actp->sa_handler != SIG_IGN) { 3873 if ((actp->sa_flags & SA_NODEFER) == 0) { 3874 // automaticlly block the signal 3875 sigaddset(&(actp->sa_mask), sig); 3876 } 3877 3878 sa_handler_t hand; 3879 sa_sigaction_t sa; 3880 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 3881 // retrieve the chained handler 3882 if (siginfo_flag_set) { 3883 sa = actp->sa_sigaction; 3884 } else { 3885 hand = actp->sa_handler; 3886 } 3887 3888 if ((actp->sa_flags & SA_RESETHAND) != 0) { 3889 actp->sa_handler = SIG_DFL; 3890 } 3891 3892 // try to honor the signal mask 3893 sigset_t oset; 3894 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); 3895 3896 // call into the chained handler 3897 if (siginfo_flag_set) { 3898 (*sa)(sig, siginfo, context); 3899 } else { 3900 (*hand)(sig); 3901 } 3902 3903 // restore the signal mask 3904 pthread_sigmask(SIG_SETMASK, &oset, 0); 3905 } 3906 // Tell jvm's signal handler the signal is taken care of. 3907 return true; 3908} 3909 3910bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 3911 bool chained = false; 3912 // signal-chaining 3913 if (UseSignalChaining) { 3914 struct sigaction *actp = get_chained_signal_action(sig); 3915 if (actp != NULL) { 3916 chained = call_chained_handler(actp, sig, siginfo, context); 3917 } 3918 } 3919 return chained; 3920} 3921 3922struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 3923 assert((chainedsigactions != (struct sigaction *)NULL) && 3924 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3925 if (preinstalled_sigs[sig] != 0) { 3926 return &chainedsigactions[sig]; 3927 } 3928 return NULL; 3929} 3930 3931void os::Solaris::save_preinstalled_handler(int sig, 3932 struct sigaction& oldAct) { 3933 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 3934 assert((chainedsigactions != (struct sigaction *)NULL) && 3935 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3936 chainedsigactions[sig] = oldAct; 3937 preinstalled_sigs[sig] = 1; 3938} 3939 3940void os::Solaris::set_signal_handler(int sig, bool set_installed, 3941 bool oktochain) { 3942 // Check for overwrite. 3943 struct sigaction oldAct; 3944 sigaction(sig, (struct sigaction*)NULL, &oldAct); 3945 void* oldhand = 3946 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3947 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3948 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 3949 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 3950 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 3951 if (AllowUserSignalHandlers || !set_installed) { 3952 // Do not overwrite; user takes responsibility to forward to us. 3953 return; 3954 } else if (UseSignalChaining) { 3955 if (oktochain) { 3956 // save the old handler in jvm 3957 save_preinstalled_handler(sig, oldAct); 3958 } else { 3959 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal."); 3960 } 3961 // libjsig also interposes the sigaction() call below and saves the 3962 // old sigaction on it own. 3963 } else { 3964 fatal("Encountered unexpected pre-existing sigaction handler " 3965 "%#lx for signal %d.", (long)oldhand, sig); 3966 } 3967 } 3968 3969 struct sigaction sigAct; 3970 sigfillset(&(sigAct.sa_mask)); 3971 sigAct.sa_handler = SIG_DFL; 3972 3973 sigAct.sa_sigaction = signalHandler; 3974 // Handle SIGSEGV on alternate signal stack if 3975 // not using stack banging 3976 if (!UseStackBanging && sig == SIGSEGV) { 3977 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 3978 } else { 3979 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 3980 } 3981 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 3982 3983 sigaction(sig, &sigAct, &oldAct); 3984 3985 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3986 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3987 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 3988} 3989 3990 3991#define DO_SIGNAL_CHECK(sig) \ 3992 do { \ 3993 if (!sigismember(&check_signal_done, sig)) { \ 3994 os::Solaris::check_signal_handler(sig); \ 3995 } \ 3996 } while (0) 3997 3998// This method is a periodic task to check for misbehaving JNI applications 3999// under CheckJNI, we can add any periodic checks here 4000 4001void os::run_periodic_checks() { 4002 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4003 // thereby preventing a NULL checks. 4004 if (!check_addr0_done) check_addr0_done = check_addr0(tty); 4005 4006 if (check_signals == false) return; 4007 4008 // SEGV and BUS if overridden could potentially prevent 4009 // generation of hs*.log in the event of a crash, debugging 4010 // such a case can be very challenging, so we absolutely 4011 // check for the following for a good measure: 4012 DO_SIGNAL_CHECK(SIGSEGV); 4013 DO_SIGNAL_CHECK(SIGILL); 4014 DO_SIGNAL_CHECK(SIGFPE); 4015 DO_SIGNAL_CHECK(SIGBUS); 4016 DO_SIGNAL_CHECK(SIGPIPE); 4017 DO_SIGNAL_CHECK(SIGXFSZ); 4018 4019 // ReduceSignalUsage allows the user to override these handlers 4020 // see comments at the very top and jvm_solaris.h 4021 if (!ReduceSignalUsage) { 4022 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4023 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4024 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4025 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4026 } 4027 4028 // See comments above for using JVM1/JVM2 4029 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4030 4031} 4032 4033typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4034 4035static os_sigaction_t os_sigaction = NULL; 4036 4037void os::Solaris::check_signal_handler(int sig) { 4038 char buf[O_BUFLEN]; 4039 address jvmHandler = NULL; 4040 4041 struct sigaction act; 4042 if (os_sigaction == NULL) { 4043 // only trust the default sigaction, in case it has been interposed 4044 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4045 if (os_sigaction == NULL) return; 4046 } 4047 4048 os_sigaction(sig, (struct sigaction*)NULL, &act); 4049 4050 address thisHandler = (act.sa_flags & SA_SIGINFO) 4051 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4052 : CAST_FROM_FN_PTR(address, act.sa_handler); 4053 4054 4055 switch (sig) { 4056 case SIGSEGV: 4057 case SIGBUS: 4058 case SIGFPE: 4059 case SIGPIPE: 4060 case SIGXFSZ: 4061 case SIGILL: 4062 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4063 break; 4064 4065 case SHUTDOWN1_SIGNAL: 4066 case SHUTDOWN2_SIGNAL: 4067 case SHUTDOWN3_SIGNAL: 4068 case BREAK_SIGNAL: 4069 jvmHandler = (address)user_handler(); 4070 break; 4071 4072 default: 4073 int asynsig = os::Solaris::SIGasync(); 4074 4075 if (sig == asynsig) { 4076 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4077 } else { 4078 return; 4079 } 4080 break; 4081 } 4082 4083 4084 if (thisHandler != jvmHandler) { 4085 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4086 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4087 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4088 // No need to check this sig any longer 4089 sigaddset(&check_signal_done, sig); 4090 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN 4091 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { 4092 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", 4093 exception_name(sig, buf, O_BUFLEN)); 4094 } 4095 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4096 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4097 tty->print("expected:"); 4098 os::Posix::print_sa_flags(tty, os::Solaris::get_our_sigflags(sig)); 4099 tty->cr(); 4100 tty->print(" found:"); 4101 os::Posix::print_sa_flags(tty, act.sa_flags); 4102 tty->cr(); 4103 // No need to check this sig any longer 4104 sigaddset(&check_signal_done, sig); 4105 } 4106 4107 // Print all the signal handler state 4108 if (sigismember(&check_signal_done, sig)) { 4109 print_signal_handlers(tty, buf, O_BUFLEN); 4110 } 4111 4112} 4113 4114void os::Solaris::install_signal_handlers() { 4115 bool libjsigdone = false; 4116 signal_handlers_are_installed = true; 4117 4118 // signal-chaining 4119 typedef void (*signal_setting_t)(); 4120 signal_setting_t begin_signal_setting = NULL; 4121 signal_setting_t end_signal_setting = NULL; 4122 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4123 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4124 if (begin_signal_setting != NULL) { 4125 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4126 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4127 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4128 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4129 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4130 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4131 libjsig_is_loaded = true; 4132 if (os::Solaris::get_libjsig_version != NULL) { 4133 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4134 } 4135 assert(UseSignalChaining, "should enable signal-chaining"); 4136 } 4137 if (libjsig_is_loaded) { 4138 // Tell libjsig jvm is setting signal handlers 4139 (*begin_signal_setting)(); 4140 } 4141 4142 set_signal_handler(SIGSEGV, true, true); 4143 set_signal_handler(SIGPIPE, true, true); 4144 set_signal_handler(SIGXFSZ, true, true); 4145 set_signal_handler(SIGBUS, true, true); 4146 set_signal_handler(SIGILL, true, true); 4147 set_signal_handler(SIGFPE, true, true); 4148 4149 4150 if (os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4151 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4152 // can not register overridable signals which might be > 32 4153 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4154 // Tell libjsig jvm has finished setting signal handlers 4155 (*end_signal_setting)(); 4156 libjsigdone = true; 4157 } 4158 } 4159 4160 set_signal_handler(os::Solaris::SIGasync(), true, true); 4161 4162 if (libjsig_is_loaded && !libjsigdone) { 4163 // Tell libjsig jvm finishes setting signal handlers 4164 (*end_signal_setting)(); 4165 } 4166 4167 // We don't activate signal checker if libjsig is in place, we trust ourselves 4168 // and if UserSignalHandler is installed all bets are off. 4169 // Log that signal checking is off only if -verbose:jni is specified. 4170 if (CheckJNICalls) { 4171 if (libjsig_is_loaded) { 4172 if (PrintJNIResolving) { 4173 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4174 } 4175 check_signals = false; 4176 } 4177 if (AllowUserSignalHandlers) { 4178 if (PrintJNIResolving) { 4179 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4180 } 4181 check_signals = false; 4182 } 4183 } 4184} 4185 4186 4187void report_error(const char* file_name, int line_no, const char* title, 4188 const char* format, ...); 4189 4190// (Static) wrapper for getisax(2) call. 4191os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4192 4193// (Static) wrappers for the liblgrp API 4194os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4195os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4196os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4197os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4198os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4199os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4200os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4201os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4202os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4203 4204// (Static) wrapper for meminfo() call. 4205os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4206 4207static address resolve_symbol_lazy(const char* name) { 4208 address addr = (address) dlsym(RTLD_DEFAULT, name); 4209 if (addr == NULL) { 4210 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4211 addr = (address) dlsym(RTLD_NEXT, name); 4212 } 4213 return addr; 4214} 4215 4216static address resolve_symbol(const char* name) { 4217 address addr = resolve_symbol_lazy(name); 4218 if (addr == NULL) { 4219 fatal(dlerror()); 4220 } 4221 return addr; 4222} 4223 4224void os::Solaris::libthread_init() { 4225 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4226 4227 lwp_priocntl_init(); 4228 4229 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4230 if (func == NULL) { 4231 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4232 // Guarantee that this VM is running on an new enough OS (5.6 or 4233 // later) that it will have a new enough libthread.so. 4234 guarantee(func != NULL, "libthread.so is too old."); 4235 } 4236 4237 int size; 4238 void (*handler_info_func)(address *, int *); 4239 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4240 handler_info_func(&handler_start, &size); 4241 handler_end = handler_start + size; 4242} 4243 4244 4245int_fnP_mutex_tP os::Solaris::_mutex_lock; 4246int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4247int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4248int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4249int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4250int os::Solaris::_mutex_scope = USYNC_THREAD; 4251 4252int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4253int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4254int_fnP_cond_tP os::Solaris::_cond_signal; 4255int_fnP_cond_tP os::Solaris::_cond_broadcast; 4256int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4257int_fnP_cond_tP os::Solaris::_cond_destroy; 4258int os::Solaris::_cond_scope = USYNC_THREAD; 4259 4260void os::Solaris::synchronization_init() { 4261 if (UseLWPSynchronization) { 4262 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4263 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4264 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4265 os::Solaris::set_mutex_init(lwp_mutex_init); 4266 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4267 os::Solaris::set_mutex_scope(USYNC_THREAD); 4268 4269 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4270 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4271 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4272 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4273 os::Solaris::set_cond_init(lwp_cond_init); 4274 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4275 os::Solaris::set_cond_scope(USYNC_THREAD); 4276 } else { 4277 os::Solaris::set_mutex_scope(USYNC_THREAD); 4278 os::Solaris::set_cond_scope(USYNC_THREAD); 4279 4280 if (UsePthreads) { 4281 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4282 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4283 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4284 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4285 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4286 4287 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4288 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4289 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4290 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4291 os::Solaris::set_cond_init(pthread_cond_default_init); 4292 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4293 } else { 4294 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4295 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4296 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4297 os::Solaris::set_mutex_init(::mutex_init); 4298 os::Solaris::set_mutex_destroy(::mutex_destroy); 4299 4300 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4301 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4302 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4303 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4304 os::Solaris::set_cond_init(::cond_init); 4305 os::Solaris::set_cond_destroy(::cond_destroy); 4306 } 4307 } 4308} 4309 4310bool os::Solaris::liblgrp_init() { 4311 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4312 if (handle != NULL) { 4313 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4314 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4315 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4316 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4317 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4318 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4319 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4320 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4321 dlsym(handle, "lgrp_cookie_stale"))); 4322 4323 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4324 set_lgrp_cookie(c); 4325 return true; 4326 } 4327 return false; 4328} 4329 4330void os::Solaris::misc_sym_init() { 4331 address func; 4332 4333 // getisax 4334 func = resolve_symbol_lazy("getisax"); 4335 if (func != NULL) { 4336 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4337 } 4338 4339 // meminfo 4340 func = resolve_symbol_lazy("meminfo"); 4341 if (func != NULL) { 4342 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4343 } 4344} 4345 4346uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4347 assert(_getisax != NULL, "_getisax not set"); 4348 return _getisax(array, n); 4349} 4350 4351// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4352typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4353static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4354 4355void init_pset_getloadavg_ptr(void) { 4356 pset_getloadavg_ptr = 4357 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4358 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4359 warning("pset_getloadavg function not found"); 4360 } 4361} 4362 4363int os::Solaris::_dev_zero_fd = -1; 4364 4365// this is called _before_ the global arguments have been parsed 4366void os::init(void) { 4367 _initial_pid = getpid(); 4368 4369 max_hrtime = first_hrtime = gethrtime(); 4370 4371 init_random(1234567); 4372 4373 page_size = sysconf(_SC_PAGESIZE); 4374 if (page_size == -1) { 4375 fatal("os_solaris.cpp: os::init: sysconf failed (%s)", os::strerror(errno)); 4376 } 4377 init_page_sizes((size_t) page_size); 4378 4379 Solaris::initialize_system_info(); 4380 4381 // Initialize misc. symbols as soon as possible, so we can use them 4382 // if we need them. 4383 Solaris::misc_sym_init(); 4384 4385 int fd = ::open("/dev/zero", O_RDWR); 4386 if (fd < 0) { 4387 fatal("os::init: cannot open /dev/zero (%s)", os::strerror(errno)); 4388 } else { 4389 Solaris::set_dev_zero_fd(fd); 4390 4391 // Close on exec, child won't inherit. 4392 fcntl(fd, F_SETFD, FD_CLOEXEC); 4393 } 4394 4395 clock_tics_per_sec = CLK_TCK; 4396 4397 // check if dladdr1() exists; dladdr1 can provide more information than 4398 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4399 // and is available on linker patches for 5.7 and 5.8. 4400 // libdl.so must have been loaded, this call is just an entry lookup 4401 void * hdl = dlopen("libdl.so", RTLD_NOW); 4402 if (hdl) { 4403 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4404 } 4405 4406 // (Solaris only) this switches to calls that actually do locking. 4407 ThreadCritical::initialize(); 4408 4409 main_thread = thr_self(); 4410 4411 // Constant minimum stack size allowed. It must be at least 4412 // the minimum of what the OS supports (thr_min_stack()), and 4413 // enough to allow the thread to get to user bytecode execution. 4414 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4415} 4416 4417// To install functions for atexit system call 4418extern "C" { 4419 static void perfMemory_exit_helper() { 4420 perfMemory_exit(); 4421 } 4422} 4423 4424// this is called _after_ the global arguments have been parsed 4425jint os::init_2(void) { 4426 // try to enable extended file IO ASAP, see 6431278 4427 os::Solaris::try_enable_extended_io(); 4428 4429 // Allocate a single page and mark it as readable for safepoint polling. Also 4430 // use this first mmap call to check support for MAP_ALIGN. 4431 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4432 page_size, 4433 MAP_PRIVATE | MAP_ALIGN, 4434 PROT_READ); 4435 if (polling_page == NULL) { 4436 has_map_align = false; 4437 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4438 PROT_READ); 4439 } 4440 4441 os::set_polling_page(polling_page); 4442 4443#ifndef PRODUCT 4444 if (Verbose && PrintMiscellaneous) { 4445 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", 4446 (intptr_t)polling_page); 4447 } 4448#endif 4449 4450 if (!UseMembar) { 4451 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE); 4452 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4453 os::set_memory_serialize_page(mem_serialize_page); 4454 4455#ifndef PRODUCT 4456 if (Verbose && PrintMiscellaneous) { 4457 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", 4458 (intptr_t)mem_serialize_page); 4459 } 4460#endif 4461 } 4462 4463 // Check minimum allowable stack size for thread creation and to initialize 4464 // the java system classes, including StackOverflowError - depends on page 4465 // size. Add a page for compiler2 recursion in main thread. 4466 // Add in 2*BytesPerWord times page size to account for VM stack during 4467 // class initialization depending on 32 or 64 bit VM. 4468 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4469 JavaThread::stack_guard_zone_size() + 4470 JavaThread::stack_shadow_zone_size() + 4471 (2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 4472 4473 size_t threadStackSizeInBytes = ThreadStackSize * K; 4474 if (threadStackSizeInBytes != 0 && 4475 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 4476 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4477 os::Solaris::min_stack_allowed/K); 4478 return JNI_ERR; 4479 } 4480 4481 // For 64kbps there will be a 64kb page size, which makes 4482 // the usable default stack size quite a bit less. Increase the 4483 // stack for 64kb (or any > than 8kb) pages, this increases 4484 // virtual memory fragmentation (since we're not creating the 4485 // stack on a power of 2 boundary. The real fix for this 4486 // should be to fix the guard page mechanism. 4487 4488 if (vm_page_size() > 8*K) { 4489 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4490 ? threadStackSizeInBytes + 4491 JavaThread::stack_red_zone_size() + 4492 JavaThread::stack_yellow_zone_size() 4493 : 0; 4494 ThreadStackSize = threadStackSizeInBytes/K; 4495 } 4496 4497 // Make the stack size a multiple of the page size so that 4498 // the yellow/red zones can be guarded. 4499 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4500 vm_page_size())); 4501 4502 Solaris::libthread_init(); 4503 4504 if (UseNUMA) { 4505 if (!Solaris::liblgrp_init()) { 4506 UseNUMA = false; 4507 } else { 4508 size_t lgrp_limit = os::numa_get_groups_num(); 4509 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 4510 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4511 FREE_C_HEAP_ARRAY(int, lgrp_ids); 4512 if (lgrp_num < 2) { 4513 // There's only one locality group, disable NUMA. 4514 UseNUMA = false; 4515 } 4516 } 4517 if (!UseNUMA && ForceNUMA) { 4518 UseNUMA = true; 4519 } 4520 } 4521 4522 Solaris::signal_sets_init(); 4523 Solaris::init_signal_mem(); 4524 Solaris::install_signal_handlers(); 4525 4526 if (libjsigversion < JSIG_VERSION_1_4_1) { 4527 Maxlibjsigsigs = OLDMAXSIGNUM; 4528 } 4529 4530 // initialize synchronization primitives to use either thread or 4531 // lwp synchronization (controlled by UseLWPSynchronization) 4532 Solaris::synchronization_init(); 4533 4534 if (MaxFDLimit) { 4535 // set the number of file descriptors to max. print out error 4536 // if getrlimit/setrlimit fails but continue regardless. 4537 struct rlimit nbr_files; 4538 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4539 if (status != 0) { 4540 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4541 perror("os::init_2 getrlimit failed"); 4542 } 4543 } else { 4544 nbr_files.rlim_cur = nbr_files.rlim_max; 4545 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4546 if (status != 0) { 4547 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4548 perror("os::init_2 setrlimit failed"); 4549 } 4550 } 4551 } 4552 } 4553 4554 // Calculate theoretical max. size of Threads to guard gainst 4555 // artifical out-of-memory situations, where all available address- 4556 // space has been reserved by thread stacks. Default stack size is 1Mb. 4557 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4558 JavaThread::stack_size_at_create() : (1*K*K); 4559 assert(pre_thread_stack_size != 0, "Must have a stack"); 4560 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4561 // we should start doing Virtual Memory banging. Currently when the threads will 4562 // have used all but 200Mb of space. 4563 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4564 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4565 4566 // at-exit methods are called in the reverse order of their registration. 4567 // In Solaris 7 and earlier, atexit functions are called on return from 4568 // main or as a result of a call to exit(3C). There can be only 32 of 4569 // these functions registered and atexit() does not set errno. In Solaris 4570 // 8 and later, there is no limit to the number of functions registered 4571 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4572 // functions are called upon dlclose(3DL) in addition to return from main 4573 // and exit(3C). 4574 4575 if (PerfAllowAtExitRegistration) { 4576 // only register atexit functions if PerfAllowAtExitRegistration is set. 4577 // atexit functions can be delayed until process exit time, which 4578 // can be problematic for embedded VM situations. Embedded VMs should 4579 // call DestroyJavaVM() to assure that VM resources are released. 4580 4581 // note: perfMemory_exit_helper atexit function may be removed in 4582 // the future if the appropriate cleanup code can be added to the 4583 // VM_Exit VMOperation's doit method. 4584 if (atexit(perfMemory_exit_helper) != 0) { 4585 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4586 } 4587 } 4588 4589 // Init pset_loadavg function pointer 4590 init_pset_getloadavg_ptr(); 4591 4592 return JNI_OK; 4593} 4594 4595// Mark the polling page as unreadable 4596void os::make_polling_page_unreadable(void) { 4597 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) { 4598 fatal("Could not disable polling page"); 4599 } 4600} 4601 4602// Mark the polling page as readable 4603void os::make_polling_page_readable(void) { 4604 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) { 4605 fatal("Could not enable polling page"); 4606 } 4607} 4608 4609// OS interface. 4610 4611bool os::check_heap(bool force) { return true; } 4612 4613// Is a (classpath) directory empty? 4614bool os::dir_is_empty(const char* path) { 4615 DIR *dir = NULL; 4616 struct dirent *ptr; 4617 4618 dir = opendir(path); 4619 if (dir == NULL) return true; 4620 4621 // Scan the directory 4622 bool result = true; 4623 char buf[sizeof(struct dirent) + MAX_PATH]; 4624 struct dirent *dbuf = (struct dirent *) buf; 4625 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4626 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4627 result = false; 4628 } 4629 } 4630 closedir(dir); 4631 return result; 4632} 4633 4634// This code originates from JDK's sysOpen and open64_w 4635// from src/solaris/hpi/src/system_md.c 4636 4637int os::open(const char *path, int oflag, int mode) { 4638 if (strlen(path) > MAX_PATH - 1) { 4639 errno = ENAMETOOLONG; 4640 return -1; 4641 } 4642 int fd; 4643 4644 fd = ::open64(path, oflag, mode); 4645 if (fd == -1) return -1; 4646 4647 // If the open succeeded, the file might still be a directory 4648 { 4649 struct stat64 buf64; 4650 int ret = ::fstat64(fd, &buf64); 4651 int st_mode = buf64.st_mode; 4652 4653 if (ret != -1) { 4654 if ((st_mode & S_IFMT) == S_IFDIR) { 4655 errno = EISDIR; 4656 ::close(fd); 4657 return -1; 4658 } 4659 } else { 4660 ::close(fd); 4661 return -1; 4662 } 4663 } 4664 4665 // 32-bit Solaris systems suffer from: 4666 // 4667 // - an historical default soft limit of 256 per-process file 4668 // descriptors that is too low for many Java programs. 4669 // 4670 // - a design flaw where file descriptors created using stdio 4671 // fopen must be less than 256, _even_ when the first limit above 4672 // has been raised. This can cause calls to fopen (but not calls to 4673 // open, for example) to fail mysteriously, perhaps in 3rd party 4674 // native code (although the JDK itself uses fopen). One can hardly 4675 // criticize them for using this most standard of all functions. 4676 // 4677 // We attempt to make everything work anyways by: 4678 // 4679 // - raising the soft limit on per-process file descriptors beyond 4680 // 256 4681 // 4682 // - As of Solaris 10u4, we can request that Solaris raise the 256 4683 // stdio fopen limit by calling function enable_extended_FILE_stdio. 4684 // This is done in init_2 and recorded in enabled_extended_FILE_stdio 4685 // 4686 // - If we are stuck on an old (pre 10u4) Solaris system, we can 4687 // workaround the bug by remapping non-stdio file descriptors below 4688 // 256 to ones beyond 256, which is done below. 4689 // 4690 // See: 4691 // 1085341: 32-bit stdio routines should support file descriptors >255 4692 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files 4693 // 6431278: Netbeans crash on 32 bit Solaris: need to call 4694 // enable_extended_FILE_stdio() in VM initialisation 4695 // Giri Mandalika's blog 4696 // http://technopark02.blogspot.com/2005_05_01_archive.html 4697 // 4698#ifndef _LP64 4699 if ((!enabled_extended_FILE_stdio) && fd < 256) { 4700 int newfd = ::fcntl(fd, F_DUPFD, 256); 4701 if (newfd != -1) { 4702 ::close(fd); 4703 fd = newfd; 4704 } 4705 } 4706#endif // 32-bit Solaris 4707 4708 // All file descriptors that are opened in the JVM and not 4709 // specifically destined for a subprocess should have the 4710 // close-on-exec flag set. If we don't set it, then careless 3rd 4711 // party native code might fork and exec without closing all 4712 // appropriate file descriptors (e.g. as we do in closeDescriptors in 4713 // UNIXProcess.c), and this in turn might: 4714 // 4715 // - cause end-of-file to fail to be detected on some file 4716 // descriptors, resulting in mysterious hangs, or 4717 // 4718 // - might cause an fopen in the subprocess to fail on a system 4719 // suffering from bug 1085341. 4720 // 4721 // (Yes, the default setting of the close-on-exec flag is a Unix 4722 // design flaw) 4723 // 4724 // See: 4725 // 1085341: 32-bit stdio routines should support file descriptors >255 4726 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed 4727 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 4728 // 4729#ifdef FD_CLOEXEC 4730 { 4731 int flags = ::fcntl(fd, F_GETFD); 4732 if (flags != -1) { 4733 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 4734 } 4735 } 4736#endif 4737 4738 return fd; 4739} 4740 4741// create binary file, rewriting existing file if required 4742int os::create_binary_file(const char* path, bool rewrite_existing) { 4743 int oflags = O_WRONLY | O_CREAT; 4744 if (!rewrite_existing) { 4745 oflags |= O_EXCL; 4746 } 4747 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4748} 4749 4750// return current position of file pointer 4751jlong os::current_file_offset(int fd) { 4752 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4753} 4754 4755// move file pointer to the specified offset 4756jlong os::seek_to_file_offset(int fd, jlong offset) { 4757 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4758} 4759 4760jlong os::lseek(int fd, jlong offset, int whence) { 4761 return (jlong) ::lseek64(fd, offset, whence); 4762} 4763 4764char * os::native_path(char *path) { 4765 return path; 4766} 4767 4768int os::ftruncate(int fd, jlong length) { 4769 return ::ftruncate64(fd, length); 4770} 4771 4772int os::fsync(int fd) { 4773 RESTARTABLE_RETURN_INT(::fsync(fd)); 4774} 4775 4776int os::available(int fd, jlong *bytes) { 4777 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 4778 "Assumed _thread_in_native"); 4779 jlong cur, end; 4780 int mode; 4781 struct stat64 buf64; 4782 4783 if (::fstat64(fd, &buf64) >= 0) { 4784 mode = buf64.st_mode; 4785 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 4786 int n,ioctl_return; 4787 4788 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return); 4789 if (ioctl_return>= 0) { 4790 *bytes = n; 4791 return 1; 4792 } 4793 } 4794 } 4795 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 4796 return 0; 4797 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 4798 return 0; 4799 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 4800 return 0; 4801 } 4802 *bytes = end - cur; 4803 return 1; 4804} 4805 4806// Map a block of memory. 4807char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4808 char *addr, size_t bytes, bool read_only, 4809 bool allow_exec) { 4810 int prot; 4811 int flags; 4812 4813 if (read_only) { 4814 prot = PROT_READ; 4815 flags = MAP_SHARED; 4816 } else { 4817 prot = PROT_READ | PROT_WRITE; 4818 flags = MAP_PRIVATE; 4819 } 4820 4821 if (allow_exec) { 4822 prot |= PROT_EXEC; 4823 } 4824 4825 if (addr != NULL) { 4826 flags |= MAP_FIXED; 4827 } 4828 4829 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4830 fd, file_offset); 4831 if (mapped_address == MAP_FAILED) { 4832 return NULL; 4833 } 4834 return mapped_address; 4835} 4836 4837 4838// Remap a block of memory. 4839char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 4840 char *addr, size_t bytes, bool read_only, 4841 bool allow_exec) { 4842 // same as map_memory() on this OS 4843 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4844 allow_exec); 4845} 4846 4847 4848// Unmap a block of memory. 4849bool os::pd_unmap_memory(char* addr, size_t bytes) { 4850 return munmap(addr, bytes) == 0; 4851} 4852 4853void os::pause() { 4854 char filename[MAX_PATH]; 4855 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4856 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4857 } else { 4858 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4859 } 4860 4861 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4862 if (fd != -1) { 4863 struct stat buf; 4864 ::close(fd); 4865 while (::stat(filename, &buf) == 0) { 4866 (void)::poll(NULL, 0, 100); 4867 } 4868 } else { 4869 jio_fprintf(stderr, 4870 "Could not open pause file '%s', continuing immediately.\n", filename); 4871 } 4872} 4873 4874#ifndef PRODUCT 4875#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4876// Turn this on if you need to trace synch operations. 4877// Set RECORD_SYNCH_LIMIT to a large-enough value, 4878// and call record_synch_enable and record_synch_disable 4879// around the computation of interest. 4880 4881void record_synch(char* name, bool returning); // defined below 4882 4883class RecordSynch { 4884 char* _name; 4885 public: 4886 RecordSynch(char* name) :_name(name) { record_synch(_name, false); } 4887 ~RecordSynch() { record_synch(_name, true); } 4888}; 4889 4890#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 4891extern "C" ret name params { \ 4892 typedef ret name##_t params; \ 4893 static name##_t* implem = NULL; \ 4894 static int callcount = 0; \ 4895 if (implem == NULL) { \ 4896 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 4897 if (implem == NULL) fatal(dlerror()); \ 4898 } \ 4899 ++callcount; \ 4900 RecordSynch _rs(#name); \ 4901 inner; \ 4902 return implem args; \ 4903} 4904// in dbx, examine callcounts this way: 4905// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 4906 4907#define CHECK_POINTER_OK(p) \ 4908 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 4909#define CHECK_MU \ 4910 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 4911#define CHECK_CV \ 4912 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 4913#define CHECK_P(p) \ 4914 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 4915 4916#define CHECK_MUTEX(mutex_op) \ 4917 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 4918 4919CHECK_MUTEX( mutex_lock) 4920CHECK_MUTEX( _mutex_lock) 4921CHECK_MUTEX( mutex_unlock) 4922CHECK_MUTEX(_mutex_unlock) 4923CHECK_MUTEX( mutex_trylock) 4924CHECK_MUTEX(_mutex_trylock) 4925 4926#define CHECK_COND(cond_op) \ 4927 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV); 4928 4929CHECK_COND( cond_wait); 4930CHECK_COND(_cond_wait); 4931CHECK_COND(_cond_wait_cancel); 4932 4933#define CHECK_COND2(cond_op) \ 4934 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV); 4935 4936CHECK_COND2( cond_timedwait); 4937CHECK_COND2(_cond_timedwait); 4938CHECK_COND2(_cond_timedwait_cancel); 4939 4940// do the _lwp_* versions too 4941#define mutex_t lwp_mutex_t 4942#define cond_t lwp_cond_t 4943CHECK_MUTEX( _lwp_mutex_lock) 4944CHECK_MUTEX( _lwp_mutex_unlock) 4945CHECK_MUTEX( _lwp_mutex_trylock) 4946CHECK_MUTEX( __lwp_mutex_lock) 4947CHECK_MUTEX( __lwp_mutex_unlock) 4948CHECK_MUTEX( __lwp_mutex_trylock) 4949CHECK_MUTEX(___lwp_mutex_lock) 4950CHECK_MUTEX(___lwp_mutex_unlock) 4951 4952CHECK_COND( _lwp_cond_wait); 4953CHECK_COND( __lwp_cond_wait); 4954CHECK_COND(___lwp_cond_wait); 4955 4956CHECK_COND2( _lwp_cond_timedwait); 4957CHECK_COND2( __lwp_cond_timedwait); 4958#undef mutex_t 4959#undef cond_t 4960 4961CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4962CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4963CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 4964CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 4965CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4966CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4967CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4968CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4969 4970 4971// recording machinery: 4972 4973enum { RECORD_SYNCH_LIMIT = 200 }; 4974char* record_synch_name[RECORD_SYNCH_LIMIT]; 4975void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 4976bool record_synch_returning[RECORD_SYNCH_LIMIT]; 4977thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 4978int record_synch_count = 0; 4979bool record_synch_enabled = false; 4980 4981// in dbx, examine recorded data this way: 4982// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 4983 4984void record_synch(char* name, bool returning) { 4985 if (record_synch_enabled) { 4986 if (record_synch_count < RECORD_SYNCH_LIMIT) { 4987 record_synch_name[record_synch_count] = name; 4988 record_synch_returning[record_synch_count] = returning; 4989 record_synch_thread[record_synch_count] = thr_self(); 4990 record_synch_arg0ptr[record_synch_count] = &name; 4991 record_synch_count++; 4992 } 4993 // put more checking code here: 4994 // ... 4995 } 4996} 4997 4998void record_synch_enable() { 4999 // start collecting trace data, if not already doing so 5000 if (!record_synch_enabled) record_synch_count = 0; 5001 record_synch_enabled = true; 5002} 5003 5004void record_synch_disable() { 5005 // stop collecting trace data 5006 record_synch_enabled = false; 5007} 5008 5009#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5010#endif // PRODUCT 5011 5012const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5013const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5014 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5015 5016 5017// JVMTI & JVM monitoring and management support 5018// The thread_cpu_time() and current_thread_cpu_time() are only 5019// supported if is_thread_cpu_time_supported() returns true. 5020// They are not supported on Solaris T1. 5021 5022// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5023// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5024// of a thread. 5025// 5026// current_thread_cpu_time() and thread_cpu_time(Thread *) 5027// returns the fast estimate available on the platform. 5028 5029// hrtime_t gethrvtime() return value includes 5030// user time but does not include system time 5031jlong os::current_thread_cpu_time() { 5032 return (jlong) gethrvtime(); 5033} 5034 5035jlong os::thread_cpu_time(Thread *thread) { 5036 // return user level CPU time only to be consistent with 5037 // what current_thread_cpu_time returns. 5038 // thread_cpu_time_info() must be changed if this changes 5039 return os::thread_cpu_time(thread, false /* user time only */); 5040} 5041 5042jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5043 if (user_sys_cpu_time) { 5044 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5045 } else { 5046 return os::current_thread_cpu_time(); 5047 } 5048} 5049 5050jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5051 char proc_name[64]; 5052 int count; 5053 prusage_t prusage; 5054 jlong lwp_time; 5055 int fd; 5056 5057 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5058 getpid(), 5059 thread->osthread()->lwp_id()); 5060 fd = ::open(proc_name, O_RDONLY); 5061 if (fd == -1) return -1; 5062 5063 do { 5064 count = ::pread(fd, 5065 (void *)&prusage.pr_utime, 5066 thr_time_size, 5067 thr_time_off); 5068 } while (count < 0 && errno == EINTR); 5069 ::close(fd); 5070 if (count < 0) return -1; 5071 5072 if (user_sys_cpu_time) { 5073 // user + system CPU time 5074 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5075 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5076 (jlong)prusage.pr_stime.tv_nsec + 5077 (jlong)prusage.pr_utime.tv_nsec; 5078 } else { 5079 // user level CPU time only 5080 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5081 (jlong)prusage.pr_utime.tv_nsec; 5082 } 5083 5084 return (lwp_time); 5085} 5086 5087void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5088 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5089 info_ptr->may_skip_backward = false; // elapsed time not wall time 5090 info_ptr->may_skip_forward = false; // elapsed time not wall time 5091 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5092} 5093 5094void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5095 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5096 info_ptr->may_skip_backward = false; // elapsed time not wall time 5097 info_ptr->may_skip_forward = false; // elapsed time not wall time 5098 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5099} 5100 5101bool os::is_thread_cpu_time_supported() { 5102 return true; 5103} 5104 5105// System loadavg support. Returns -1 if load average cannot be obtained. 5106// Return the load average for our processor set if the primitive exists 5107// (Solaris 9 and later). Otherwise just return system wide loadavg. 5108int os::loadavg(double loadavg[], int nelem) { 5109 if (pset_getloadavg_ptr != NULL) { 5110 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5111 } else { 5112 return ::getloadavg(loadavg, nelem); 5113 } 5114} 5115 5116//--------------------------------------------------------------------------------- 5117 5118bool os::find(address addr, outputStream* st) { 5119 Dl_info dlinfo; 5120 memset(&dlinfo, 0, sizeof(dlinfo)); 5121 if (dladdr(addr, &dlinfo) != 0) { 5122 st->print(PTR_FORMAT ": ", addr); 5123 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 5124 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5125 } else if (dlinfo.dli_fbase != NULL) { 5126 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5127 } else { 5128 st->print("<absolute address>"); 5129 } 5130 if (dlinfo.dli_fname != NULL) { 5131 st->print(" in %s", dlinfo.dli_fname); 5132 } 5133 if (dlinfo.dli_fbase != NULL) { 5134 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 5135 } 5136 st->cr(); 5137 5138 if (Verbose) { 5139 // decode some bytes around the PC 5140 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 5141 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 5142 address lowest = (address) dlinfo.dli_sname; 5143 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5144 if (begin < lowest) begin = lowest; 5145 Dl_info dlinfo2; 5146 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 5147 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) { 5148 end = (address) dlinfo2.dli_saddr; 5149 } 5150 Disassembler::decode(begin, end, st); 5151 } 5152 return true; 5153 } 5154 return false; 5155} 5156 5157// Following function has been added to support HotSparc's libjvm.so running 5158// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5159// src/solaris/hpi/native_threads in the EVM codebase. 5160// 5161// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5162// libraries and should thus be removed. We will leave it behind for a while 5163// until we no longer want to able to run on top of 1.3.0 Solaris production 5164// JDK. See 4341971. 5165 5166#define STACK_SLACK 0x800 5167 5168extern "C" { 5169 intptr_t sysThreadAvailableStackWithSlack() { 5170 stack_t st; 5171 intptr_t retval, stack_top; 5172 retval = thr_stksegment(&st); 5173 assert(retval == 0, "incorrect return value from thr_stksegment"); 5174 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5175 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5176 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5177 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5178 } 5179} 5180 5181// ObjectMonitor park-unpark infrastructure ... 5182// 5183// We implement Solaris and Linux PlatformEvents with the 5184// obvious condvar-mutex-flag triple. 5185// Another alternative that works quite well is pipes: 5186// Each PlatformEvent consists of a pipe-pair. 5187// The thread associated with the PlatformEvent 5188// calls park(), which reads from the input end of the pipe. 5189// Unpark() writes into the other end of the pipe. 5190// The write-side of the pipe must be set NDELAY. 5191// Unfortunately pipes consume a large # of handles. 5192// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5193// Using pipes for the 1st few threads might be workable, however. 5194// 5195// park() is permitted to return spuriously. 5196// Callers of park() should wrap the call to park() in 5197// an appropriate loop. A litmus test for the correct 5198// usage of park is the following: if park() were modified 5199// to immediately return 0 your code should still work, 5200// albeit degenerating to a spin loop. 5201// 5202// In a sense, park()-unpark() just provides more polite spinning 5203// and polling with the key difference over naive spinning being 5204// that a parked thread needs to be explicitly unparked() in order 5205// to wake up and to poll the underlying condition. 5206// 5207// Assumption: 5208// Only one parker can exist on an event, which is why we allocate 5209// them per-thread. Multiple unparkers can coexist. 5210// 5211// _Event transitions in park() 5212// -1 => -1 : illegal 5213// 1 => 0 : pass - return immediately 5214// 0 => -1 : block; then set _Event to 0 before returning 5215// 5216// _Event transitions in unpark() 5217// 0 => 1 : just return 5218// 1 => 1 : just return 5219// -1 => either 0 or 1; must signal target thread 5220// That is, we can safely transition _Event from -1 to either 5221// 0 or 1. 5222// 5223// _Event serves as a restricted-range semaphore. 5224// -1 : thread is blocked, i.e. there is a waiter 5225// 0 : neutral: thread is running or ready, 5226// could have been signaled after a wait started 5227// 1 : signaled - thread is running or ready 5228// 5229// Another possible encoding of _Event would be with 5230// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5231// 5232// TODO-FIXME: add DTRACE probes for: 5233// 1. Tx parks 5234// 2. Ty unparks Tx 5235// 3. Tx resumes from park 5236 5237 5238// value determined through experimentation 5239#define ROUNDINGFIX 11 5240 5241// utility to compute the abstime argument to timedwait. 5242// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5243 5244static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5245 // millis is the relative timeout time 5246 // abstime will be the absolute timeout time 5247 if (millis < 0) millis = 0; 5248 struct timeval now; 5249 int status = gettimeofday(&now, NULL); 5250 assert(status == 0, "gettimeofday"); 5251 jlong seconds = millis / 1000; 5252 jlong max_wait_period; 5253 5254 if (UseLWPSynchronization) { 5255 // forward port of fix for 4275818 (not sleeping long enough) 5256 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5257 // _lwp_cond_timedwait() used a round_down algorithm rather 5258 // than a round_up. For millis less than our roundfactor 5259 // it rounded down to 0 which doesn't meet the spec. 5260 // For millis > roundfactor we may return a bit sooner, but 5261 // since we can not accurately identify the patch level and 5262 // this has already been fixed in Solaris 9 and 8 we will 5263 // leave it alone rather than always rounding down. 5264 5265 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5266 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5267 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5268 max_wait_period = 21000000; 5269 } else { 5270 max_wait_period = 50000000; 5271 } 5272 millis %= 1000; 5273 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5274 seconds = max_wait_period; 5275 } 5276 abstime->tv_sec = now.tv_sec + seconds; 5277 long usec = now.tv_usec + millis * 1000; 5278 if (usec >= 1000000) { 5279 abstime->tv_sec += 1; 5280 usec -= 1000000; 5281 } 5282 abstime->tv_nsec = usec * 1000; 5283 return abstime; 5284} 5285 5286void os::PlatformEvent::park() { // AKA: down() 5287 // Transitions for _Event: 5288 // -1 => -1 : illegal 5289 // 1 => 0 : pass - return immediately 5290 // 0 => -1 : block; then set _Event to 0 before returning 5291 5292 // Invariant: Only the thread associated with the Event/PlatformEvent 5293 // may call park(). 5294 assert(_nParked == 0, "invariant"); 5295 5296 int v; 5297 for (;;) { 5298 v = _Event; 5299 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5300 } 5301 guarantee(v >= 0, "invariant"); 5302 if (v == 0) { 5303 // Do this the hard way by blocking ... 5304 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5305 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5306 // Only for SPARC >= V8PlusA 5307#if defined(__sparc) && defined(COMPILER2) 5308 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5309#endif 5310 int status = os::Solaris::mutex_lock(_mutex); 5311 assert_status(status == 0, status, "mutex_lock"); 5312 guarantee(_nParked == 0, "invariant"); 5313 ++_nParked; 5314 while (_Event < 0) { 5315 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5316 // Treat this the same as if the wait was interrupted 5317 // With usr/lib/lwp going to kernel, always handle ETIME 5318 status = os::Solaris::cond_wait(_cond, _mutex); 5319 if (status == ETIME) status = EINTR; 5320 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5321 } 5322 --_nParked; 5323 _Event = 0; 5324 status = os::Solaris::mutex_unlock(_mutex); 5325 assert_status(status == 0, status, "mutex_unlock"); 5326 // Paranoia to ensure our locked and lock-free paths interact 5327 // correctly with each other. 5328 OrderAccess::fence(); 5329 } 5330} 5331 5332int os::PlatformEvent::park(jlong millis) { 5333 // Transitions for _Event: 5334 // -1 => -1 : illegal 5335 // 1 => 0 : pass - return immediately 5336 // 0 => -1 : block; then set _Event to 0 before returning 5337 5338 guarantee(_nParked == 0, "invariant"); 5339 int v; 5340 for (;;) { 5341 v = _Event; 5342 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5343 } 5344 guarantee(v >= 0, "invariant"); 5345 if (v != 0) return OS_OK; 5346 5347 int ret = OS_TIMEOUT; 5348 timestruc_t abst; 5349 compute_abstime(&abst, millis); 5350 5351 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5352 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5353 // Only for SPARC >= V8PlusA 5354#if defined(__sparc) && defined(COMPILER2) 5355 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5356#endif 5357 int status = os::Solaris::mutex_lock(_mutex); 5358 assert_status(status == 0, status, "mutex_lock"); 5359 guarantee(_nParked == 0, "invariant"); 5360 ++_nParked; 5361 while (_Event < 0) { 5362 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5363 assert_status(status == 0 || status == EINTR || 5364 status == ETIME || status == ETIMEDOUT, 5365 status, "cond_timedwait"); 5366 if (!FilterSpuriousWakeups) break; // previous semantics 5367 if (status == ETIME || status == ETIMEDOUT) break; 5368 // We consume and ignore EINTR and spurious wakeups. 5369 } 5370 --_nParked; 5371 if (_Event >= 0) ret = OS_OK; 5372 _Event = 0; 5373 status = os::Solaris::mutex_unlock(_mutex); 5374 assert_status(status == 0, status, "mutex_unlock"); 5375 // Paranoia to ensure our locked and lock-free paths interact 5376 // correctly with each other. 5377 OrderAccess::fence(); 5378 return ret; 5379} 5380 5381void os::PlatformEvent::unpark() { 5382 // Transitions for _Event: 5383 // 0 => 1 : just return 5384 // 1 => 1 : just return 5385 // -1 => either 0 or 1; must signal target thread 5386 // That is, we can safely transition _Event from -1 to either 5387 // 0 or 1. 5388 // See also: "Semaphores in Plan 9" by Mullender & Cox 5389 // 5390 // Note: Forcing a transition from "-1" to "1" on an unpark() means 5391 // that it will take two back-to-back park() calls for the owning 5392 // thread to block. This has the benefit of forcing a spurious return 5393 // from the first park() call after an unpark() call which will help 5394 // shake out uses of park() and unpark() without condition variables. 5395 5396 if (Atomic::xchg(1, &_Event) >= 0) return; 5397 5398 // If the thread associated with the event was parked, wake it. 5399 // Wait for the thread assoc with the PlatformEvent to vacate. 5400 int status = os::Solaris::mutex_lock(_mutex); 5401 assert_status(status == 0, status, "mutex_lock"); 5402 int AnyWaiters = _nParked; 5403 status = os::Solaris::mutex_unlock(_mutex); 5404 assert_status(status == 0, status, "mutex_unlock"); 5405 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 5406 if (AnyWaiters != 0) { 5407 // Note that we signal() *after* dropping the lock for "immortal" Events. 5408 // This is safe and avoids a common class of futile wakeups. In rare 5409 // circumstances this can cause a thread to return prematurely from 5410 // cond_{timed}wait() but the spurious wakeup is benign and the victim 5411 // will simply re-test the condition and re-park itself. 5412 // This provides particular benefit if the underlying platform does not 5413 // provide wait morphing. 5414 status = os::Solaris::cond_signal(_cond); 5415 assert_status(status == 0, status, "cond_signal"); 5416 } 5417} 5418 5419// JSR166 5420// ------------------------------------------------------- 5421 5422// The solaris and linux implementations of park/unpark are fairly 5423// conservative for now, but can be improved. They currently use a 5424// mutex/condvar pair, plus _counter. 5425// Park decrements _counter if > 0, else does a condvar wait. Unpark 5426// sets count to 1 and signals condvar. Only one thread ever waits 5427// on the condvar. Contention seen when trying to park implies that someone 5428// is unparking you, so don't wait. And spurious returns are fine, so there 5429// is no need to track notifications. 5430 5431#define MAX_SECS 100000000 5432 5433// This code is common to linux and solaris and will be moved to a 5434// common place in dolphin. 5435// 5436// The passed in time value is either a relative time in nanoseconds 5437// or an absolute time in milliseconds. Either way it has to be unpacked 5438// into suitable seconds and nanoseconds components and stored in the 5439// given timespec structure. 5440// Given time is a 64-bit value and the time_t used in the timespec is only 5441// a signed-32-bit value (except on 64-bit Linux) we have to watch for 5442// overflow if times way in the future are given. Further on Solaris versions 5443// prior to 10 there is a restriction (see cond_timedwait) that the specified 5444// number of seconds, in abstime, is less than current_time + 100,000,000. 5445// As it will be 28 years before "now + 100000000" will overflow we can 5446// ignore overflow and just impose a hard-limit on seconds using the value 5447// of "now + 100,000,000". This places a limit on the timeout of about 3.17 5448// years from "now". 5449// 5450static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5451 assert(time > 0, "convertTime"); 5452 5453 struct timeval now; 5454 int status = gettimeofday(&now, NULL); 5455 assert(status == 0, "gettimeofday"); 5456 5457 time_t max_secs = now.tv_sec + MAX_SECS; 5458 5459 if (isAbsolute) { 5460 jlong secs = time / 1000; 5461 if (secs > max_secs) { 5462 absTime->tv_sec = max_secs; 5463 } else { 5464 absTime->tv_sec = secs; 5465 } 5466 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5467 } else { 5468 jlong secs = time / NANOSECS_PER_SEC; 5469 if (secs >= MAX_SECS) { 5470 absTime->tv_sec = max_secs; 5471 absTime->tv_nsec = 0; 5472 } else { 5473 absTime->tv_sec = now.tv_sec + secs; 5474 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5475 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5476 absTime->tv_nsec -= NANOSECS_PER_SEC; 5477 ++absTime->tv_sec; // note: this must be <= max_secs 5478 } 5479 } 5480 } 5481 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5482 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5483 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5484 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5485} 5486 5487void Parker::park(bool isAbsolute, jlong time) { 5488 // Ideally we'd do something useful while spinning, such 5489 // as calling unpackTime(). 5490 5491 // Optional fast-path check: 5492 // Return immediately if a permit is available. 5493 // We depend on Atomic::xchg() having full barrier semantics 5494 // since we are doing a lock-free update to _counter. 5495 if (Atomic::xchg(0, &_counter) > 0) return; 5496 5497 // Optional fast-exit: Check interrupt before trying to wait 5498 Thread* thread = Thread::current(); 5499 assert(thread->is_Java_thread(), "Must be JavaThread"); 5500 JavaThread *jt = (JavaThread *)thread; 5501 if (Thread::is_interrupted(thread, false)) { 5502 return; 5503 } 5504 5505 // First, demultiplex/decode time arguments 5506 timespec absTime; 5507 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all 5508 return; 5509 } 5510 if (time > 0) { 5511 // Warning: this code might be exposed to the old Solaris time 5512 // round-down bugs. Grep "roundingFix" for details. 5513 unpackTime(&absTime, isAbsolute, time); 5514 } 5515 5516 // Enter safepoint region 5517 // Beware of deadlocks such as 6317397. 5518 // The per-thread Parker:: _mutex is a classic leaf-lock. 5519 // In particular a thread must never block on the Threads_lock while 5520 // holding the Parker:: mutex. If safepoints are pending both the 5521 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5522 ThreadBlockInVM tbivm(jt); 5523 5524 // Don't wait if cannot get lock since interference arises from 5525 // unblocking. Also. check interrupt before trying wait 5526 if (Thread::is_interrupted(thread, false) || 5527 os::Solaris::mutex_trylock(_mutex) != 0) { 5528 return; 5529 } 5530 5531 int status; 5532 5533 if (_counter > 0) { // no wait needed 5534 _counter = 0; 5535 status = os::Solaris::mutex_unlock(_mutex); 5536 assert(status == 0, "invariant"); 5537 // Paranoia to ensure our locked and lock-free paths interact 5538 // correctly with each other and Java-level accesses. 5539 OrderAccess::fence(); 5540 return; 5541 } 5542 5543#ifdef ASSERT 5544 // Don't catch signals while blocked; let the running threads have the signals. 5545 // (This allows a debugger to break into the running thread.) 5546 sigset_t oldsigs; 5547 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5548 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5549#endif 5550 5551 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5552 jt->set_suspend_equivalent(); 5553 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5554 5555 // Do this the hard way by blocking ... 5556 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5557 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5558 // Only for SPARC >= V8PlusA 5559#if defined(__sparc) && defined(COMPILER2) 5560 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5561#endif 5562 5563 if (time == 0) { 5564 status = os::Solaris::cond_wait(_cond, _mutex); 5565 } else { 5566 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5567 } 5568 // Note that an untimed cond_wait() can sometimes return ETIME on older 5569 // versions of the Solaris. 5570 assert_status(status == 0 || status == EINTR || 5571 status == ETIME || status == ETIMEDOUT, 5572 status, "cond_timedwait"); 5573 5574#ifdef ASSERT 5575 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); 5576#endif 5577 _counter = 0; 5578 status = os::Solaris::mutex_unlock(_mutex); 5579 assert_status(status == 0, status, "mutex_unlock"); 5580 // Paranoia to ensure our locked and lock-free paths interact 5581 // correctly with each other and Java-level accesses. 5582 OrderAccess::fence(); 5583 5584 // If externally suspended while waiting, re-suspend 5585 if (jt->handle_special_suspend_equivalent_condition()) { 5586 jt->java_suspend_self(); 5587 } 5588} 5589 5590void Parker::unpark() { 5591 int status = os::Solaris::mutex_lock(_mutex); 5592 assert(status == 0, "invariant"); 5593 const int s = _counter; 5594 _counter = 1; 5595 status = os::Solaris::mutex_unlock(_mutex); 5596 assert(status == 0, "invariant"); 5597 5598 if (s < 1) { 5599 status = os::Solaris::cond_signal(_cond); 5600 assert(status == 0, "invariant"); 5601 } 5602} 5603 5604extern char** environ; 5605 5606// Run the specified command in a separate process. Return its exit value, 5607// or -1 on failure (e.g. can't fork a new process). 5608// Unlike system(), this function can be called from signal handler. It 5609// doesn't block SIGINT et al. 5610int os::fork_and_exec(char* cmd) { 5611 char * argv[4]; 5612 argv[0] = (char *)"sh"; 5613 argv[1] = (char *)"-c"; 5614 argv[2] = cmd; 5615 argv[3] = NULL; 5616 5617 // fork is async-safe, fork1 is not so can't use in signal handler 5618 pid_t pid; 5619 Thread* t = Thread::current_or_null_safe(); 5620 if (t != NULL && t->is_inside_signal_handler()) { 5621 pid = fork(); 5622 } else { 5623 pid = fork1(); 5624 } 5625 5626 if (pid < 0) { 5627 // fork failed 5628 warning("fork failed: %s", os::strerror(errno)); 5629 return -1; 5630 5631 } else if (pid == 0) { 5632 // child process 5633 5634 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5635 execve("/usr/bin/sh", argv, environ); 5636 5637 // execve failed 5638 _exit(-1); 5639 5640 } else { 5641 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5642 // care about the actual exit code, for now. 5643 5644 int status; 5645 5646 // Wait for the child process to exit. This returns immediately if 5647 // the child has already exited. */ 5648 while (waitpid(pid, &status, 0) < 0) { 5649 switch (errno) { 5650 case ECHILD: return 0; 5651 case EINTR: break; 5652 default: return -1; 5653 } 5654 } 5655 5656 if (WIFEXITED(status)) { 5657 // The child exited normally; get its exit code. 5658 return WEXITSTATUS(status); 5659 } else if (WIFSIGNALED(status)) { 5660 // The child exited because of a signal 5661 // The best value to return is 0x80 + signal number, 5662 // because that is what all Unix shells do, and because 5663 // it allows callers to distinguish between process exit and 5664 // process death by signal. 5665 return 0x80 + WTERMSIG(status); 5666 } else { 5667 // Unknown exit code; pass it through 5668 return status; 5669 } 5670 } 5671} 5672 5673// is_headless_jre() 5674// 5675// Test for the existence of xawt/libmawt.so or libawt_xawt.so 5676// in order to report if we are running in a headless jre 5677// 5678// Since JDK8 xawt/libmawt.so was moved into the same directory 5679// as libawt.so, and renamed libawt_xawt.so 5680// 5681bool os::is_headless_jre() { 5682 struct stat statbuf; 5683 char buf[MAXPATHLEN]; 5684 char libmawtpath[MAXPATHLEN]; 5685 const char *xawtstr = "/xawt/libmawt.so"; 5686 const char *new_xawtstr = "/libawt_xawt.so"; 5687 char *p; 5688 5689 // Get path to libjvm.so 5690 os::jvm_path(buf, sizeof(buf)); 5691 5692 // Get rid of libjvm.so 5693 p = strrchr(buf, '/'); 5694 if (p == NULL) { 5695 return false; 5696 } else { 5697 *p = '\0'; 5698 } 5699 5700 // Get rid of client or server 5701 p = strrchr(buf, '/'); 5702 if (p == NULL) { 5703 return false; 5704 } else { 5705 *p = '\0'; 5706 } 5707 5708 // check xawt/libmawt.so 5709 strcpy(libmawtpath, buf); 5710 strcat(libmawtpath, xawtstr); 5711 if (::stat(libmawtpath, &statbuf) == 0) return false; 5712 5713 // check libawt_xawt.so 5714 strcpy(libmawtpath, buf); 5715 strcat(libmawtpath, new_xawtstr); 5716 if (::stat(libmawtpath, &statbuf) == 0) return false; 5717 5718 return true; 5719} 5720 5721size_t os::write(int fd, const void *buf, unsigned int nBytes) { 5722 size_t res; 5723 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 5724 return res; 5725} 5726 5727int os::close(int fd) { 5728 return ::close(fd); 5729} 5730 5731int os::socket_close(int fd) { 5732 return ::close(fd); 5733} 5734 5735int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 5736 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5737 "Assumed _thread_in_native"); 5738 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags)); 5739} 5740 5741int os::send(int fd, char* buf, size_t nBytes, uint flags) { 5742 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5743 "Assumed _thread_in_native"); 5744 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5745} 5746 5747int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 5748 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5749} 5750 5751// As both poll and select can be interrupted by signals, we have to be 5752// prepared to restart the system call after updating the timeout, unless 5753// a poll() is done with timeout == -1, in which case we repeat with this 5754// "wait forever" value. 5755 5756int os::connect(int fd, struct sockaddr *him, socklen_t len) { 5757 int _result; 5758 _result = ::connect(fd, him, len); 5759 5760 // On Solaris, when a connect() call is interrupted, the connection 5761 // can be established asynchronously (see 6343810). Subsequent calls 5762 // to connect() must check the errno value which has the semantic 5763 // described below (copied from the connect() man page). Handling 5764 // of asynchronously established connections is required for both 5765 // blocking and non-blocking sockets. 5766 // EINTR The connection attempt was interrupted 5767 // before any data arrived by the delivery of 5768 // a signal. The connection, however, will be 5769 // established asynchronously. 5770 // 5771 // EINPROGRESS The socket is non-blocking, and the connec- 5772 // tion cannot be completed immediately. 5773 // 5774 // EALREADY The socket is non-blocking, and a previous 5775 // connection attempt has not yet been com- 5776 // pleted. 5777 // 5778 // EISCONN The socket is already connected. 5779 if (_result == OS_ERR && errno == EINTR) { 5780 // restarting a connect() changes its errno semantics 5781 RESTARTABLE(::connect(fd, him, len), _result); 5782 // undo these changes 5783 if (_result == OS_ERR) { 5784 if (errno == EALREADY) { 5785 errno = EINPROGRESS; // fall through 5786 } else if (errno == EISCONN) { 5787 errno = 0; 5788 return OS_OK; 5789 } 5790 } 5791 } 5792 return _result; 5793} 5794 5795// Get the default path to the core file 5796// Returns the length of the string 5797int os::get_core_path(char* buffer, size_t bufferSize) { 5798 const char* p = get_current_directory(buffer, bufferSize); 5799 5800 if (p == NULL) { 5801 assert(p != NULL, "failed to get current directory"); 5802 return 0; 5803 } 5804 5805 jio_snprintf(buffer, bufferSize, "%s/core or core.%d", 5806 p, current_process_id()); 5807 5808 return strlen(buffer); 5809} 5810 5811#ifndef PRODUCT 5812void TestReserveMemorySpecial_test() { 5813 // No tests available for this platform 5814} 5815#endif 5816 5817bool os::start_debugging(char *buf, int buflen) { 5818 int len = (int)strlen(buf); 5819 char *p = &buf[len]; 5820 5821 jio_snprintf(p, buflen-len, 5822 "\n\n" 5823 "Do you want to debug the problem?\n\n" 5824 "To debug, run 'dbx - %d'; then switch to thread " INTX_FORMAT "\n" 5825 "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n" 5826 "Otherwise, press RETURN to abort...", 5827 os::current_process_id(), os::current_thread_id()); 5828 5829 bool yes = os::message_box("Unexpected Error", buf); 5830 5831 if (yes) { 5832 // yes, user asked VM to launch debugger 5833 jio_snprintf(buf, sizeof(buf), "dbx - %d", os::current_process_id()); 5834 5835 os::fork_and_exec(buf); 5836 yes = false; 5837 } 5838 return yes; 5839} 5840