os_solaris.cpp revision 79:82db0859acbe
154359Sroberto/* 254359Sroberto * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. 354359Sroberto * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 454359Sroberto * 554359Sroberto * This code is free software; you can redistribute it and/or modify it 654359Sroberto * under the terms of the GNU General Public License version 2 only, as 754359Sroberto * published by the Free Software Foundation. 854359Sroberto * 954359Sroberto * This code is distributed in the hope that it will be useful, but WITHOUT 1054359Sroberto * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1154359Sroberto * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12132451Sroberto * version 2 for more details (a copy is included in the LICENSE file that 13132451Sroberto * accompanied this code). 14132451Sroberto * 1582498Sroberto * You should have received a copy of the GNU General Public License version 1654359Sroberto * 2 along with this work; if not, write to the Free Software Foundation, 1754359Sroberto * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1854359Sroberto * 1954359Sroberto * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 2054359Sroberto * CA 95054 USA or visit www.sun.com if you need additional information or 2154359Sroberto * have any questions. 2254359Sroberto * 2354359Sroberto */ 2454359Sroberto 2554359Sroberto// do not include precompiled header file 2654359Sroberto# include "incls/_os_solaris.cpp.incl" 2754359Sroberto 2854359Sroberto// put OS-includes here 2954359Sroberto# include <dlfcn.h> 3054359Sroberto# include <errno.h> 3182498Sroberto# include <link.h> 32132451Sroberto# include <poll.h> 33132451Sroberto# include <pthread.h> 34132451Sroberto# include <pwd.h> 35132451Sroberto# include <schedctl.h> 36132451Sroberto# include <setjmp.h> 37132451Sroberto# include <signal.h> 3882498Sroberto# include <stdio.h> 39132451Sroberto# include <alloca.h> 40132451Sroberto# include <sys/filio.h> 41132451Sroberto# include <sys/ipc.h> 4282498Sroberto# include <sys/lwp.h> 43182007Sroberto# include <sys/machelf.h> // for elf Sym structure used by dladdr1 44182007Sroberto# include <sys/mman.h> 45182007Sroberto# include <sys/processor.h> 46182007Sroberto# include <sys/procset.h> 47182007Sroberto# include <sys/pset.h> 48182007Sroberto# include <sys/resource.h> 49182007Sroberto# include <sys/shm.h> 50182007Sroberto# include <sys/socket.h> 51182007Sroberto# include <sys/stat.h> 52182007Sroberto# include <sys/systeminfo.h> 53182007Sroberto# include <sys/time.h> 5454359Sroberto# include <sys/times.h> 55182007Sroberto# include <sys/types.h> 56182007Sroberto# include <sys/wait.h> 57182007Sroberto# include <sys/utsname.h> 58182007Sroberto# include <thread.h> 59182007Sroberto# include <unistd.h> 60182007Sroberto# include <sys/priocntl.h> 61182007Sroberto# include <sys/rtpriocntl.h> 62182007Sroberto# include <sys/tspriocntl.h> 63182007Sroberto# include <sys/iapriocntl.h> 64182007Sroberto# include <sys/loadavg.h> 65182007Sroberto# include <string.h> 66182007Sroberto 67182007Sroberto# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 68182007Sroberto# include <sys/procfs.h> // see comment in <sys/procfs.h> 69182007Sroberto 70182007Sroberto#define MAX_PATH (2 * K) 71182007Sroberto 72182007Sroberto// for timer info max values which include all bits 7354359Sroberto#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 7482498Sroberto 7582498Sroberto#ifdef _GNU_SOURCE 7654359Sroberto// See bug #6514594 7754359Srobertoextern "C" int madvise(caddr_t, size_t, int); 7882498Srobertoextern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 7982498Sroberto int attr, int mask); 8054359Sroberto#endif //_GNU_SOURCE 8154359Sroberto 8254359Sroberto/* 8382498Sroberto MPSS Changes Start. 8482498Sroberto The JVM binary needs to be built and run on pre-Solaris 9 8582498Sroberto systems, but the constants needed by MPSS are only in Solaris 9 8682498Sroberto header files. They are textually replicated here to allow 8754359Sroberto building on earlier systems. Once building on Solaris 8 is 8854359Sroberto no longer a requirement, these #defines can be replaced by ordinary 8954359Sroberto system .h inclusion. 9054359Sroberto 9154359Sroberto In earlier versions of the JDK and Solaris, we used ISM for large pages. 9254359Sroberto But ISM requires shared memory to achieve this and thus has many caveats. 9382498Sroberto MPSS is a fully transparent and is a cleaner way to get large pages. 9454359Sroberto Although we still require keeping ISM for backward compatiblitiy as well as 9554359Sroberto giving the opportunity to use large pages on older systems it is 9654359Sroberto recommended that MPSS be used for Solaris 9 and above. 9754359Sroberto 9854359Sroberto*/ 9954359Sroberto 10054359Sroberto#ifndef MC_HAT_ADVISE 10154359Sroberto 10254359Srobertostruct memcntl_mha { 10356746Sroberto uint_t mha_cmd; /* command(s) */ 10456746Sroberto uint_t mha_flags; 10556746Sroberto size_t mha_pagesize; 10682498Sroberto}; 10756746Sroberto#define MC_HAT_ADVISE 7 /* advise hat map size */ 10882498Sroberto#define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 10982498Sroberto#define MAP_ALIGN 0x200 /* addr specifies alignment */ 11056746Sroberto 11156746Sroberto#endif 11254359Sroberto// MPSS Changes End. 11354359Sroberto 11454359Sroberto 11554359Sroberto// Here are some liblgrp types from sys/lgrp_user.h to be able to 116182007Sroberto// compile on older systems without this header file. 11754359Sroberto 11882498Sroberto#ifndef MADV_ACCESS_LWP 11982498Sroberto# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 12082498Sroberto#endif 12182498Sroberto#ifndef MADV_ACCESS_MANY 12282498Sroberto# define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 12382498Sroberto#endif 12454359Sroberto 12554359Sroberto// Some more macros from sys/mman.h that are not present in Solaris 8. 12654359Sroberto 12756746Sroberto#ifndef MAX_MEMINFO_CNT 12856746Sroberto/* 12956746Sroberto * info_req request type definitions for meminfo 13056746Sroberto * request types starting with MEMINFO_V are used for Virtual addresses 13156746Sroberto * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 132182007Sroberto * addresses 13356746Sroberto */ 13456746Sroberto# define MEMINFO_SHIFT 16 13554359Sroberto# define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 13654359Sroberto# define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 137182007Sroberto# define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 13854359Sroberto# define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 13954359Sroberto# define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 14056746Sroberto# define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 14156746Sroberto# define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 14256746Sroberto# define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 14356746Sroberto 14454359Sroberto/* maximum number of addresses meminfo() can process at a time */ 14554359Sroberto# define MAX_MEMINFO_CNT 256 146132451Sroberto 147132451Sroberto/* maximum number of request types */ 148132451Sroberto# define MAX_MEMINFO_REQ 31 14954359Sroberto#endif 15054359Sroberto 15182498Sroberto// see thr_setprio(3T) for the basis of these numbers 15254359Sroberto#define MinimumPriority 0 15354359Sroberto#define NormalPriority 64 15454359Sroberto#define MaximumPriority 127 15554359Sroberto 15654359Sroberto// Values for ThreadPriorityPolicy == 1 15754359Srobertoint prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64, 15882498Sroberto 80, 96, 112, 124, 127 }; 15954359Sroberto 16054359Sroberto// System parameters used internally 16154359Srobertostatic clock_t clock_tics_per_sec = 100; 16254359Sroberto 16354359Sroberto// For diagnostics to print a message once. see run_periodic_checks 164132451Srobertostatic bool check_addr0_done = false; 165132451Srobertostatic sigset_t check_signal_done; 166132451Srobertostatic bool check_signals = true; 167132451Sroberto 168132451Srobertoaddress os::Solaris::handler_start; // start pc of thr_sighndlrinfo 169132451Srobertoaddress os::Solaris::handler_end; // end pc of thr_sighndlrinfo 170132451Sroberto 171132451Srobertoaddress os::Solaris::_main_stack_base = NULL; // 4352906 workaround 17282498Sroberto 17382498Sroberto 17482498Sroberto// "default" initializers for missing libc APIs 17582498Srobertoextern "C" { 17682498Sroberto static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 17782498Sroberto static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 17882498Sroberto 17982498Sroberto static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 18082498Sroberto static int lwp_cond_destroy(cond_t *cv) { return 0; } 18182498Sroberto} 18282498Sroberto 18382498Sroberto// "default" initializers for pthread-based synchronization 18482498Srobertoextern "C" { 18582498Sroberto static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 18682498Sroberto static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 18782498Sroberto} 18882498Sroberto 18982498Sroberto// Thread Local Storage 19082498Sroberto// This is common to all Solaris platforms so it is defined here, 19182498Sroberto// in this common file. 19282498Sroberto// The declarations are in the os_cpu threadLS*.hpp files. 19382498Sroberto// 19482498Sroberto// Static member initialization for TLS 19582498SrobertoThread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 19682498Sroberto 19782498Sroberto#ifndef PRODUCT 19882498Sroberto#define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 19982498Sroberto 20082498Srobertoint ThreadLocalStorage::_tcacheHit = 0; 20182498Srobertoint ThreadLocalStorage::_tcacheMiss = 0; 20282498Sroberto 20382498Srobertovoid ThreadLocalStorage::print_statistics() { 20482498Sroberto int total = _tcacheMiss+_tcacheHit; 20582498Sroberto tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 20682498Sroberto _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 20782498Sroberto} 20882498Sroberto#undef _PCT 20982498Sroberto#endif // PRODUCT 21082498Sroberto 21182498SrobertoThread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 21282498Sroberto int index) { 21382498Sroberto Thread *thread = get_thread_slow(); 21482498Sroberto if (thread != NULL) { 21554359Sroberto address sp = os::current_stack_pointer(); 21654359Sroberto guarantee(thread->_stack_base == NULL || 21782498Sroberto (sp <= thread->_stack_base && 21882498Sroberto sp >= thread->_stack_base - thread->_stack_size) || 21982498Sroberto is_error_reported(), 22054359Sroberto "sp must be inside of selected thread stack"); 22154359Sroberto 222132451Sroberto thread->_self_raw_id = raw_id; // mark for quick retrieval 22354359Sroberto _get_thread_cache[ index ] = thread; 22454359Sroberto } 22554359Sroberto return thread; 22682498Sroberto} 22754359Sroberto 228132451Sroberto 22954359Srobertostatic const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 23054359Sroberto#define NO_CACHED_THREAD ((Thread*)all_zero) 23154359Sroberto 23282498Srobertovoid ThreadLocalStorage::pd_set_thread(Thread* thread) { 23354359Sroberto 23454359Sroberto // Store the new value before updating the cache to prevent a race 23582498Sroberto // between get_thread_via_cache_slowly() and this store operation. 23682498Sroberto os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 23782498Sroberto 23882498Sroberto // Update thread cache with new thread if setting on thread create, 23982498Sroberto // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 24082498Sroberto uintptr_t raw = pd_raw_thread_id(); 24182498Sroberto int ix = pd_cache_index(raw); 24282498Sroberto _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 243132451Sroberto} 244132451Sroberto 24582498Srobertovoid ThreadLocalStorage::pd_init() { 24654359Sroberto for (int i = 0; i < _pd_cache_size; i++) { 24754359Sroberto _get_thread_cache[i] = NO_CACHED_THREAD; 24854359Sroberto } 24982498Sroberto} 25054359Sroberto 25182498Sroberto// Invalidate all the caches (happens to be the same as pd_init). 25254359Srobertovoid ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 25382498Sroberto 25482498Sroberto#undef NO_CACHED_THREAD 25582498Sroberto 25682498Sroberto// END Thread Local Storage 25782498Sroberto 258182007Srobertostatic inline size_t adjust_stack_size(address base, size_t size) { 259132451Sroberto if ((ssize_t)size < 0) { 26082498Sroberto // 4759953: Compensate for ridiculous stack size. 261132451Sroberto size = max_intx; 262132451Sroberto } 263132451Sroberto if (size > (size_t)base) { 264132451Sroberto // 4812466: Make sure size doesn't allow the stack to wrap the address space. 265132451Sroberto size = (size_t)base; 266182007Sroberto } 267182007Sroberto return size; 268132451Sroberto} 269132451Sroberto 27082498Srobertostatic inline stack_t get_stack_info() { 27182498Sroberto stack_t st; 27282498Sroberto int retval = thr_stksegment(&st); 27382498Sroberto st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 274132451Sroberto assert(retval == 0, "incorrect return value from thr_stksegment"); 27554359Sroberto assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 27654359Sroberto assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 277132451Sroberto return st; 278132451Sroberto} 27954359Sroberto 280132451Srobertoaddress os::current_stack_base() { 281132451Sroberto int r = thr_main() ; 282132451Sroberto guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 283132451Sroberto bool is_primordial_thread = r; 284132451Sroberto 28582498Sroberto // Workaround 4352906, avoid calls to thr_stksegment by 28654359Sroberto // thr_main after the first one (it looks like we trash 28754359Sroberto // some data, causing the value for ss_sp to be incorrect). 288132451Sroberto if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 289132451Sroberto stack_t st = get_stack_info(); 290132451Sroberto if (is_primordial_thread) { 291182007Sroberto // cache initial value of stack base 292132451Sroberto os::Solaris::_main_stack_base = (address)st.ss_sp; 293132451Sroberto } 294132451Sroberto return (address)st.ss_sp; 29582498Sroberto } else { 296132451Sroberto guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 29754359Sroberto return os::Solaris::_main_stack_base; 29854359Sroberto } 29954359Sroberto} 30054359Sroberto 30154359Srobertosize_t os::current_stack_size() { 302132451Sroberto size_t size; 303132451Sroberto 304132451Sroberto int r = thr_main() ; 305132451Sroberto guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 306132451Sroberto if(!r) { 307132451Sroberto size = get_stack_info().ss_size; 308132451Sroberto } else { 309132451Sroberto struct rlimit limits; 310132451Sroberto getrlimit(RLIMIT_STACK, &limits); 31154359Sroberto size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 312132451Sroberto } 313132451Sroberto // base may not be page aligned 314132451Sroberto address base = current_stack_base(); 315132451Sroberto address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 316132451Sroberto return (size_t)(base - bottom); 317132451Sroberto} 318132451Sroberto 319132451Sroberto// interruptible infrastructure 320132451Sroberto 321132451Sroberto// setup_interruptible saves the thread state before going into an 322132451Sroberto// interruptible system call. 323132451Sroberto// The saved state is used to restore the thread to 324132451Sroberto// its former state whether or not an interrupt is received. 325132451Sroberto// Used by classloader os::read 326132451Sroberto// hpi calls skip this layer and stay in _thread_in_native 327132451Sroberto 328132451Srobertovoid os::Solaris::setup_interruptible(JavaThread* thread) { 329132451Sroberto 33082498Sroberto JavaThreadState thread_state = thread->thread_state(); 331132451Sroberto 332132451Sroberto assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 33382498Sroberto assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 33482498Sroberto OSThread* osthread = thread->osthread(); 33582498Sroberto osthread->set_saved_interrupt_thread_state(thread_state); 33682498Sroberto thread->frame_anchor()->make_walkable(thread); 33782498Sroberto ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 338132451Sroberto} 33982498Sroberto 340132451Sroberto// Version of setup_interruptible() for threads that are already in 34182498Sroberto// _thread_blocked. Used by os_sleep(). 34282498Srobertovoid os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 34382498Sroberto thread->frame_anchor()->make_walkable(thread); 34482498Sroberto} 34582498Sroberto 34682498SrobertoJavaThread* os::Solaris::setup_interruptible() { 347132451Sroberto JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 348132451Sroberto setup_interruptible(thread); 34982498Sroberto return thread; 35082498Sroberto} 35154359Sroberto 35254359Srobertovoid os::Solaris::try_enable_extended_io() { 35354359Sroberto typedef int (*enable_extended_FILE_stdio_t)(int, int); 35454359Sroberto 35554359Sroberto if (!UseExtendedFileIO) { 35654359Sroberto return; 35754359Sroberto } 358182007Sroberto 35954359Sroberto enable_extended_FILE_stdio_t enabler = 36054359Sroberto (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 36154359Sroberto "enable_extended_FILE_stdio"); 36254359Sroberto if (enabler) { 36354359Sroberto enabler(-1, -1); 36482498Sroberto } 36554359Sroberto} 36654359Sroberto 36756746Sroberto 36854359Sroberto#ifdef ASSERT 36954359Sroberto 37082498SrobertoJavaThread* os::Solaris::setup_interruptible_native() { 37154359Sroberto JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 37256746Sroberto JavaThreadState thread_state = thread->thread_state(); 37354359Sroberto assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 37482498Sroberto return thread; 37582498Sroberto} 37682498Sroberto 37782498Srobertovoid os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 378132451Sroberto JavaThreadState thread_state = thread->thread_state(); 379132451Sroberto assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 380132451Sroberto} 38182498Sroberto#endif 38282498Sroberto 383132451Sroberto// cleanup_interruptible reverses the effects of setup_interruptible 384132451Sroberto// setup_interruptible_already_blocked() does not need any cleanup. 385132451Sroberto 386132451Srobertovoid os::Solaris::cleanup_interruptible(JavaThread* thread) { 38782498Sroberto OSThread* osthread = thread->osthread(); 38882498Sroberto 38982498Sroberto ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 39082498Sroberto} 39182498Sroberto 39282498Sroberto// I/O interruption related counters called in _INTERRUPTIBLE 39382498Sroberto 39482498Srobertovoid os::Solaris::bump_interrupted_before_count() { 39582498Sroberto RuntimeService::record_interrupted_before_count(); 396132451Sroberto} 39782498Sroberto 39882498Srobertovoid os::Solaris::bump_interrupted_during_count() { 39982498Sroberto RuntimeService::record_interrupted_during_count(); 40082498Sroberto} 40182498Sroberto 40282498Srobertostatic int _processors_online = 0; 40382498Sroberto 40482498Sroberto jint os::Solaris::_os_thread_limit = 0; 40582498Srobertovolatile jint os::Solaris::_os_thread_count = 0; 406132451Sroberto 407132451Srobertojulong os::available_memory() { 408132451Sroberto return Solaris::available_memory(); 409182007Sroberto} 410132451Sroberto 41182498Srobertojulong os::Solaris::available_memory() { 41282498Sroberto return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 41382498Sroberto} 41482498Sroberto 41554359Srobertojulong os::Solaris::_physical_memory = 0; 41654359Sroberto 41754359Srobertojulong os::physical_memory() { 418132451Sroberto return Solaris::physical_memory(); 419132451Sroberto} 420132451Sroberto 421132451Srobertojulong os::allocatable_physical_memory(julong size) { 422132451Sroberto#ifdef _LP64 423132451Sroberto return size; 424132451Sroberto#else 425132451Sroberto julong result = MIN2(size, (julong)3835*M); 426132451Sroberto if (!is_allocatable(result)) { 427132451Sroberto // Memory allocations will be aligned but the alignment 428132451Sroberto // is not known at this point. Alignments will 429132451Sroberto // be at most to LargePageSizeInBytes. Protect 430132451Sroberto // allocations from alignments up to illegal 431132451Sroberto // values. If at this point 2G is illegal. 432132451Sroberto julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 433132451Sroberto result = MIN2(size, reasonable_size); 434132451Sroberto } 435132451Sroberto return result; 436132451Sroberto#endif 437132451Sroberto} 438132451Sroberto 439132451Srobertostatic hrtime_t first_hrtime = 0; 440132451Srobertostatic const hrtime_t hrtime_hz = 1000*1000*1000; 441132451Srobertoconst int LOCK_BUSY = 1; 442132451Srobertoconst int LOCK_FREE = 0; 443132451Srobertoconst int LOCK_INVALID = -1; 444132451Srobertostatic volatile hrtime_t max_hrtime = 0; 445132451Srobertostatic volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 446132451Sroberto 447132451Sroberto 448132451Srobertovoid os::Solaris::initialize_system_info() { 449132451Sroberto _processor_count = sysconf(_SC_NPROCESSORS_CONF); 450182007Sroberto _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 451182007Sroberto _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 452132451Sroberto} 453132451Sroberto 454132451Srobertoint os::active_processor_count() { 455132451Sroberto int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 456132451Sroberto pid_t pid = getpid(); 457132451Sroberto psetid_t pset = PS_NONE; 458132451Sroberto // Are we running in a processor set? 459132451Sroberto if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 460182007Sroberto if (pset != PS_NONE) { 461182007Sroberto uint_t pset_cpus; 462132451Sroberto // Query number of cpus in processor set 463132451Sroberto if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 464132451Sroberto assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 465132451Sroberto _processors_online = pset_cpus; 466132451Sroberto return pset_cpus; 467132451Sroberto } 468132451Sroberto } 469132451Sroberto } 470132451Sroberto // Otherwise return number of online cpus 471132451Sroberto return online_cpus; 472132451Sroberto} 473132451Sroberto 474132451Srobertostatic bool find_processors_in_pset(psetid_t pset, 475132451Sroberto processorid_t** id_array, 476132451Sroberto uint_t* id_length) { 477132451Sroberto bool result = false; 478132451Sroberto // Find the number of processors in the processor set. 479132451Sroberto if (pset_info(pset, NULL, id_length, NULL) == 0) { 480132451Sroberto // Make up an array to hold their ids. 48154359Sroberto *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 482132451Sroberto // Fill in the array with their processor ids. 483132451Sroberto if (pset_info(pset, NULL, id_length, *id_array) == 0) { 484132451Sroberto result = true; 485132451Sroberto } 486132451Sroberto } 487132451Sroberto return result; 48854359Sroberto} 48954359Sroberto 490132451Sroberto// Callers of find_processors_online() must tolerate imprecise results -- 491132451Sroberto// the system configuration can change asynchronously because of DR 49282498Sroberto// or explicit psradm operations. 493182007Sroberto// 494182007Sroberto// We also need to take care that the loop (below) terminates as the 49554359Sroberto// number of processors online can change between the _SC_NPROCESSORS_ONLN 49654359Sroberto// request and the loop that builds the list of processor ids. Unfortunately 49754359Sroberto// there's no reliable way to determine the maximum valid processor id, 49854359Sroberto// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 49954359Sroberto// man pages, which claim the processor id set is "sparse, but 50054359Sroberto// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 50154359Sroberto// exit the loop. 50254359Sroberto// 50354359Sroberto// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 50482498Sroberto// not available on S8.0. 50554359Sroberto 50654359Srobertostatic bool find_processors_online(processorid_t** id_array, 50754359Sroberto uint* id_length) { 50854359Sroberto const processorid_t MAX_PROCESSOR_ID = 100000 ; 50954359Sroberto // Find the number of processors online. 51054359Sroberto *id_length = sysconf(_SC_NPROCESSORS_ONLN); 51154359Sroberto // Make up an array to hold their ids. 51254359Sroberto *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 51354359Sroberto // Processors need not be numbered consecutively. 51454359Sroberto long found = 0; 51554359Sroberto processorid_t next = 0; 51654359Sroberto while (found < *id_length && next < MAX_PROCESSOR_ID) { 51754359Sroberto processor_info_t info; 51854359Sroberto if (processor_info(next, &info) == 0) { 51954359Sroberto // NB, PI_NOINTR processors are effectively online ... 52056746Sroberto if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 52154359Sroberto (*id_array)[found] = next; 52254359Sroberto found += 1; 52354359Sroberto } 52482498Sroberto } 52554359Sroberto next += 1; 52654359Sroberto } 52754359Sroberto if (found < *id_length) { 52854359Sroberto // The loop above didn't identify the expected number of processors. 52954359Sroberto // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 53054359Sroberto // and re-running the loop, above, but there's no guarantee of progress 531182007Sroberto // if the system configuration is in flux. Instead, we just return what 53254359Sroberto // we've got. Note that in the worst case find_processors_online() could 53354359Sroberto // return an empty set. (As a fall-back in the case of the empty set we 534182007Sroberto // could just return the ID of the current processor). 535182007Sroberto *id_length = found ; 53654359Sroberto } 53754359Sroberto 53854359Sroberto return true; 539132451Sroberto} 540132451Sroberto 541132451Srobertostatic bool assign_distribution(processorid_t* id_array, 542132451Sroberto uint id_length, 543132451Sroberto uint* distribution, 544132451Sroberto uint distribution_length) { 545132451Sroberto // We assume we can assign processorid_t's to uint's. 546132451Sroberto assert(sizeof(processorid_t) == sizeof(uint), 547132451Sroberto "can't convert processorid_t to uint"); 54854359Sroberto // Quick check to see if we won't succeed. 54954359Sroberto if (id_length < distribution_length) { 55082498Sroberto return false; 55182498Sroberto } 55282498Sroberto // Assign processor ids to the distribution. 55382498Sroberto // Try to shuffle processors to distribute work across boards, 554132451Sroberto // assuming 4 processors per board. 555132451Sroberto const uint processors_per_board = ProcessDistributionStride; 55682498Sroberto // Find the maximum processor id. 55754359Sroberto processorid_t max_id = 0; 55882498Sroberto for (uint m = 0; m < id_length; m += 1) { 559132451Sroberto max_id = MAX2(max_id, id_array[m]); 560132451Sroberto } 56182498Sroberto // The next id, to limit loops. 56282498Sroberto const processorid_t limit_id = max_id + 1; 56382498Sroberto // Make up markers for available processors. 564132451Sroberto bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); 565132451Sroberto for (uint c = 0; c < limit_id; c += 1) { 56654359Sroberto available_id[c] = false; 56782498Sroberto } 56882498Sroberto for (uint a = 0; a < id_length; a += 1) { 56982498Sroberto available_id[id_array[a]] = true; 57082498Sroberto } 57182498Sroberto // Step by "boards", then by "slot", copying to "assigned". 57282498Sroberto // NEEDS_CLEANUP: The assignment of processors should be stateful, 573182007Sroberto // remembering which processors have been assigned by 574182007Sroberto // previous calls, etc., so as to distribute several 57554359Sroberto // independent calls of this method. What we'd like is 576182007Sroberto // It would be nice to have an API that let us ask 577182007Sroberto // how many processes are bound to a processor, 578182007Sroberto // but we don't have that, either. 57954359Sroberto // In the short term, "board" is static so that 580182007Sroberto // subsequent distributions don't all start at board 0. 581182007Sroberto static uint board = 0; 582182007Sroberto uint assigned = 0; 583182007Sroberto // Until we've found enough processors .... 584182007Sroberto while (assigned < distribution_length) { 585182007Sroberto // ... find the next available processor in the board. 586182007Sroberto for (uint slot = 0; slot < processors_per_board; slot += 1) { 587182007Sroberto uint try_id = board * processors_per_board + slot; 588182007Sroberto if ((try_id < limit_id) && (available_id[try_id] == true)) { 589182007Sroberto distribution[assigned] = try_id; 590182007Sroberto available_id[try_id] = false; 591182007Sroberto assigned += 1; 592182007Sroberto break; 593182007Sroberto } 594182007Sroberto } 595182007Sroberto board += 1; 596182007Sroberto if (board * processors_per_board + 0 >= limit_id) { 597182007Sroberto board = 0; 598182007Sroberto } 599182007Sroberto } 600182007Sroberto if (available_id != NULL) { 601182007Sroberto FREE_C_HEAP_ARRAY(bool, available_id); 602182007Sroberto } 60354359Sroberto return true; 60454359Sroberto} 605182007Sroberto 606182007Srobertobool os::distribute_processes(uint length, uint* distribution) { 607182007Sroberto bool result = false; 608182007Sroberto // Find the processor id's of all the available CPUs. 609182007Sroberto processorid_t* id_array = NULL; 610132451Sroberto uint id_length = 0; 611182007Sroberto // There are some races between querying information and using it, 612182007Sroberto // since processor sets can change dynamically. 613182007Sroberto psetid_t pset = PS_NONE; 614182007Sroberto // Are we running in a processor set? 615132451Sroberto if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 616132451Sroberto result = find_processors_in_pset(pset, &id_array, &id_length); 617182007Sroberto } else { 618182007Sroberto result = find_processors_online(&id_array, &id_length); 619182007Sroberto } 620182007Sroberto if (result == true) { 621182007Sroberto if (id_length >= length) { 622182007Sroberto result = assign_distribution(id_array, id_length, distribution, length); 623182007Sroberto } else { 624182007Sroberto result = false; 625182007Sroberto } 626182007Sroberto } 627182007Sroberto if (id_array != NULL) { 628182007Sroberto FREE_C_HEAP_ARRAY(processorid_t, id_array); 629182007Sroberto } 630182007Sroberto return result; 631182007Sroberto} 632182007Sroberto 633182007Srobertobool os::bind_to_processor(uint processor_id) { 634182007Sroberto // We assume that a processorid_t can be stored in a uint. 635182007Sroberto assert(sizeof(uint) == sizeof(processorid_t), 636182007Sroberto "can't convert uint to processorid_t"); 637182007Sroberto int bind_result = 638182007Sroberto processor_bind(P_LWPID, // bind LWP. 639182007Sroberto P_MYID, // bind current LWP. 640182007Sroberto (processorid_t) processor_id, // id. 641182007Sroberto NULL); // don't return old binding. 642182007Sroberto return (bind_result == 0); 643182007Sroberto} 644132451Sroberto 645132451Srobertobool os::getenv(const char* name, char* buffer, int len) { 646132451Sroberto char* val = ::getenv( name ); 647132451Sroberto if ( val == NULL 648132451Sroberto || strlen(val) + 1 > len ) { 649132451Sroberto if (len > 0) buffer[0] = 0; // return a null string 650132451Sroberto return false; 651132451Sroberto } 652182007Sroberto strcpy( buffer, val ); 653132451Sroberto return true; 654132451Sroberto} 655132451Sroberto 656132451Sroberto 657132451Sroberto// Return true if user is running as root. 658132451Sroberto 659132451Srobertobool os::have_special_privileges() { 660132451Sroberto static bool init = false; 661132451Sroberto static bool privileges = false; 662132451Sroberto if (!init) { 663132451Sroberto privileges = (getuid() != geteuid()) || (getgid() != getegid()); 664132451Sroberto init = true; 665132451Sroberto } 666132451Sroberto return privileges; 667132451Sroberto} 668132451Sroberto 669132451Sroberto 670132451Srobertostatic char* get_property(char* name, char* buffer, int buffer_size) { 671132451Sroberto if (os::getenv(name, buffer, buffer_size)) { 672132451Sroberto return buffer; 673132451Sroberto } 674132451Sroberto static char empty[] = ""; 675132451Sroberto return empty; 676132451Sroberto} 677132451Sroberto 678132451Sroberto 679132451Srobertovoid os::init_system_properties_values() { 680132451Sroberto char arch[12]; 681132451Sroberto sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 682132451Sroberto 683132451Sroberto // The next steps are taken in the product version: 684132451Sroberto // 685132451Sroberto // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 686132451Sroberto // This library should be located at: 687132451Sroberto // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 688132451Sroberto // 689132451Sroberto // If "/jre/lib/" appears at the right place in the path, then we 690132451Sroberto // assume libjvm[_g].so is installed in a JDK and we use this path. 691132451Sroberto // 692132451Sroberto // Otherwise exit with message: "Could not create the Java virtual machine." 693132451Sroberto // 694132451Sroberto // The following extra steps are taken in the debugging version: 695132451Sroberto // 696132451Sroberto // If "/jre/lib/" does NOT appear at the right place in the path 697132451Sroberto // instead of exit check for $JAVA_HOME environment variable. 698132451Sroberto // 699132451Sroberto // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 700132451Sroberto // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 701132451Sroberto // it looks like libjvm[_g].so is installed there 702132451Sroberto // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 703132451Sroberto // 704182007Sroberto // Otherwise exit. 705182007Sroberto // 706132451Sroberto // Important note: if the location of libjvm.so changes this 707182007Sroberto // code needs to be changed accordingly. 708182007Sroberto 709182007Sroberto // The next few definitions allow the code to be verbatim: 710182007Sroberto#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) 711132451Sroberto#define free(p) FREE_C_HEAP_ARRAY(char, p) 712132451Sroberto#define getenv(n) ::getenv(n) 713182007Sroberto 714132451Sroberto#define EXTENSIONS_DIR "/lib/ext" 715132451Sroberto#define ENDORSED_DIR "/lib/endorsed" 716132451Sroberto#define COMMON_DIR "/usr/jdk/packages" 717132451Sroberto 718132451Sroberto { 719132451Sroberto /* sysclasspath, java_home, dll_dir */ 720132451Sroberto { 721132451Sroberto char *home_path; 722132451Sroberto char *dll_path; 723132451Sroberto char *pslash; 724132451Sroberto char buf[MAXPATHLEN]; 725132451Sroberto os::jvm_path(buf, sizeof(buf)); 726132451Sroberto 727132451Sroberto // Found the full path to libjvm.so. 728132451Sroberto // Now cut the path to <java_home>/jre if we can. 729132451Sroberto *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 730132451Sroberto pslash = strrchr(buf, '/'); 731132451Sroberto if (pslash != NULL) 732132451Sroberto *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 733132451Sroberto dll_path = malloc(strlen(buf) + 1); 734132451Sroberto if (dll_path == NULL) 735132451Sroberto return; 736132451Sroberto strcpy(dll_path, buf); 737132451Sroberto Arguments::set_dll_dir(dll_path); 738132451Sroberto 739132451Sroberto if (pslash != NULL) { 740132451Sroberto pslash = strrchr(buf, '/'); 741132451Sroberto if (pslash != NULL) { 742132451Sroberto *pslash = '\0'; /* get rid of /<arch> */ 743132451Sroberto pslash = strrchr(buf, '/'); 744132451Sroberto if (pslash != NULL) 745132451Sroberto *pslash = '\0'; /* get rid of /lib */ 746132451Sroberto } 747132451Sroberto } 748132451Sroberto 749132451Sroberto home_path = malloc(strlen(buf) + 1); 750132451Sroberto if (home_path == NULL) 751132451Sroberto return; 752132451Sroberto strcpy(home_path, buf); 753132451Sroberto Arguments::set_java_home(home_path); 754132451Sroberto 755132451Sroberto if (!set_boot_path('/', ':')) 756132451Sroberto return; 757132451Sroberto } 758132451Sroberto 759132451Sroberto /* 760132451Sroberto * Where to look for native libraries 761132451Sroberto */ 762132451Sroberto { 763132451Sroberto // Use dlinfo() to determine the correct java.library.path. 764132451Sroberto // 765132451Sroberto // If we're launched by the Java launcher, and the user 766132451Sroberto // does not set java.library.path explicitly on the commandline, 767182007Sroberto // the Java launcher sets LD_LIBRARY_PATH for us and unsets 768182007Sroberto // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 769132451Sroberto // dlinfo returns LD_LIBRARY_PATH + crle settings (including 770182007Sroberto // /usr/lib), which is exactly what we want. 771182007Sroberto // 77256746Sroberto // If the user does set java.library.path, it completely 77356746Sroberto // overwrites this setting, and always has. 77456746Sroberto // 77556746Sroberto // If we're not launched by the Java launcher, we may 776182007Sroberto // get here with any/all of the LD_LIBRARY_PATH[_32|64] 77756746Sroberto // settings. Again, dlinfo does exactly what we want. 77856746Sroberto 77956746Sroberto Dl_serinfo _info, *info = &_info; 78056746Sroberto Dl_serpath *path; 78182498Sroberto char* library_path; 78256746Sroberto char *common_path; 78356746Sroberto int i; 784182007Sroberto 785182007Sroberto // determine search path count and required buffer size 786182007Sroberto if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 787182007Sroberto vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 78854359Sroberto } 789182007Sroberto 790182007Sroberto // allocate new buffer and initialize 791182007Sroberto info = (Dl_serinfo*)malloc(_info.dls_size); 79254359Sroberto if (info == NULL) { 793182007Sroberto vm_exit_out_of_memory(_info.dls_size, 794182007Sroberto "init_system_properties_values info"); 79556746Sroberto } 796182007Sroberto info->dls_size = _info.dls_size; 797182007Sroberto info->dls_cnt = _info.dls_cnt; 798182007Sroberto 799182007Sroberto // obtain search path information 800182007Sroberto if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 801182007Sroberto free(info); 802182007Sroberto vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 803182007Sroberto } 804182007Sroberto 805182007Sroberto path = &info->dls_serpath[0]; 806182007Sroberto 807182007Sroberto // Note: Due to a legacy implementation, most of the library path 808182007Sroberto // is set in the launcher. This was to accomodate linking restrictions 809182007Sroberto // on legacy Solaris implementations (which are no longer supported). 810182007Sroberto // Eventually, all the library path setting will be done here. 811182007Sroberto // 81254359Sroberto // However, to prevent the proliferation of improperly built native 813182007Sroberto // libraries, the new path component /usr/jdk/packages is added here. 81454359Sroberto 81554359Sroberto // Determine the actual CPU architecture. 81656746Sroberto char cpu_arch[12]; 817132451Sroberto sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 81882498Sroberto#ifdef _LP64 819132451Sroberto // If we are a 64-bit vm, perform the following translations: 820132451Sroberto // sparc -> sparcv9 82182498Sroberto // i386 -> amd64 822182007Sroberto if (strcmp(cpu_arch, "sparc") == 0) 823182007Sroberto strcat(cpu_arch, "v9"); 824132451Sroberto else if (strcmp(cpu_arch, "i386") == 0) 825132451Sroberto strcpy(cpu_arch, "amd64"); 826132451Sroberto#endif 827132451Sroberto 82882498Sroberto // Construct the invariant part of ld_library_path. Note that the 829182007Sroberto // space for the colon and the trailing null are provided by the 830182007Sroberto // nulls included by the sizeof operator. 831182007Sroberto size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 832182007Sroberto common_path = malloc(bufsize); 833182007Sroberto if (common_path == NULL) { 834182007Sroberto free(info); 835182007Sroberto vm_exit_out_of_memory(bufsize, 83656746Sroberto "init_system_properties_values common_path"); 837182007Sroberto } 83854359Sroberto sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 839132451Sroberto 840132451Sroberto // struct size is more than sufficient for the path components obtained 84156746Sroberto // through the dlinfo() call, so only add additional space for the path 842132451Sroberto // components explicitly added here. 843132451Sroberto bufsize = info->dls_size + strlen(common_path); 844132451Sroberto library_path = malloc(bufsize); 845132451Sroberto if (library_path == NULL) { 846132451Sroberto free(info); 847132451Sroberto free(common_path); 848132451Sroberto vm_exit_out_of_memory(bufsize, 849132451Sroberto "init_system_properties_values library_path"); 850132451Sroberto } 851182007Sroberto library_path[0] = '\0'; 852182007Sroberto 853132451Sroberto // Construct the desired Java library path from the linker's library 854132451Sroberto // search path. 855132451Sroberto // 856132451Sroberto // For compatibility, it is optimal that we insert the additional path 857132451Sroberto // components specific to the Java VM after those components specified 858132451Sroberto // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 859132451Sroberto // infrastructure. 860132451Sroberto if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 861132451Sroberto strcpy(library_path, common_path); 862132451Sroberto } else { 863132451Sroberto int inserted = 0; 864182007Sroberto for (i = 0; i < info->dls_cnt; i++, path++) { 865132451Sroberto uint_t flags = path->dls_flags & LA_SER_MASK; 866182007Sroberto if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 867132451Sroberto strcat(library_path, common_path); 868132451Sroberto strcat(library_path, os::path_separator()); 869132451Sroberto inserted = 1; 870182007Sroberto } 871182007Sroberto strcat(library_path, path->dls_name); 872182007Sroberto strcat(library_path, os::path_separator()); 873182007Sroberto } 874182007Sroberto // eliminate trailing path separator 875182007Sroberto library_path[strlen(library_path)-1] = '\0'; 876132451Sroberto } 877132451Sroberto 87854359Sroberto // happens before argument parsing - can't use a trace flag 87954359Sroberto // tty->print_raw("init_system_properties_values: native lib path: "); 880132451Sroberto // tty->print_raw_cr(library_path); 881132451Sroberto 882132451Sroberto // callee copies into its own buffer 883182007Sroberto Arguments::set_library_path(library_path); 884182007Sroberto 885182007Sroberto free(common_path); 886182007Sroberto free(library_path); 887132451Sroberto free(info); 888132451Sroberto } 889132451Sroberto 890132451Sroberto /* 891132451Sroberto * Extensions directories. 892132451Sroberto * 893132451Sroberto * Note that the space for the colon and the trailing null are provided 894132451Sroberto * by the nulls included by the sizeof operator (so actually one byte more 895132451Sroberto * than necessary is allocated). 896132451Sroberto */ 897132451Sroberto { 898132451Sroberto char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 899132451Sroberto sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 900132451Sroberto sizeof(EXTENSIONS_DIR)); 901132451Sroberto sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 902132451Sroberto Arguments::get_java_home()); 903132451Sroberto Arguments::set_ext_dirs(buf); 904132451Sroberto } 905132451Sroberto 906132451Sroberto /* Endorsed standards default directory. */ 907132451Sroberto { 908132451Sroberto char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 909132451Sroberto sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 910132451Sroberto Arguments::set_endorsed_dirs(buf); 911132451Sroberto } 912132451Sroberto } 913132451Sroberto 914132451Sroberto#undef malloc 915132451Sroberto#undef free 916132451Sroberto#undef getenv 917132451Sroberto#undef EXTENSIONS_DIR 918182007Sroberto#undef ENDORSED_DIR 919132451Sroberto#undef COMMON_DIR 920182007Sroberto 921182007Sroberto} 922182007Sroberto 923132451Srobertovoid os::breakpoint() { 924132451Sroberto BREAKPOINT; 925132451Sroberto} 926132451Sroberto 927132451Srobertobool os::obsolete_option(const JavaVMOption *option) 928132451Sroberto{ 929132451Sroberto if (!strncmp(option->optionString, "-Xt", 3)) { 930132451Sroberto return true; 931132451Sroberto } else if (!strncmp(option->optionString, "-Xtm", 4)) { 932132451Sroberto return true; 933132451Sroberto } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 934132451Sroberto return true; 935132451Sroberto } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 936132451Sroberto return true; 937132451Sroberto } 938132451Sroberto return false; 939132451Sroberto} 940132451Sroberto 941132451Srobertobool os::Solaris::valid_stack_address(Thread* thread, address sp) { 942132451Sroberto address stackStart = (address)thread->stack_base(); 943132451Sroberto address stackEnd = (address)(stackStart - (address)thread->stack_size()); 944132451Sroberto if (sp < stackStart && sp >= stackEnd ) return true; 945132451Sroberto return false; 946132451Sroberto} 947132451Sroberto 948132451Srobertoextern "C" void breakpoint() { 949132451Sroberto // use debugger to set breakpoint here 950132451Sroberto} 951132451Sroberto 952132451Sroberto// Returns an estimate of the current stack pointer. Result must be guaranteed to 953132451Sroberto// point into the calling threads stack, and be no lower than the current stack 954132451Sroberto// pointer. 955132451Srobertoaddress os::current_stack_pointer() { 956132451Sroberto volatile int dummy; 957182007Sroberto address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 958182007Sroberto return sp; 959182007Sroberto} 960182007Sroberto 96154359Srobertostatic thread_t main_thread; 96254359Sroberto 963132451Sroberto// Thread start routine for all new Java threads 964182007Srobertoextern "C" void* java_start(void* thread_addr) { 965182007Sroberto // Try to randomize the cache line index of hot stack frames. 966182007Sroberto // This helps when threads of the same stack traces evict each other's 967182007Sroberto // cache lines. The threads can be either from the same JVM instance, or 968182007Sroberto // from different JVM instances. The benefit is especially true for 96954359Sroberto // processors with hyperthreading technology. 970182007Sroberto static int counter = 0; 971182007Sroberto int pid = os::current_process_id(); 972132451Sroberto alloca(((pid ^ counter++) & 7) * 128); 973132451Sroberto 974132451Sroberto int prio; 975132451Sroberto Thread* thread = (Thread*)thread_addr; 976132451Sroberto OSThread* osthr = thread->osthread(); 977132451Sroberto 978132451Sroberto osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 979132451Sroberto thread->_schedctl = (void *) schedctl_init () ; 980182007Sroberto 981132451Sroberto if (UseNUMA) { 982132451Sroberto int lgrp_id = os::numa_get_group_id(); 983132451Sroberto if (lgrp_id != -1) { 984132451Sroberto thread->set_lgrp_id(lgrp_id); 985132451Sroberto } 986132451Sroberto } 987132451Sroberto 988132451Sroberto // If the creator called set priority before we started, 989132451Sroberto // we need to call set priority now that we have an lwp. 990132451Sroberto // Get the priority from libthread and set the priority 991132451Sroberto // for the new Solaris lwp. 992132451Sroberto if ( osthr->thread_id() != -1 ) { 993132451Sroberto if ( UseThreadPriorities ) { 994132451Sroberto thr_getprio(osthr->thread_id(), &prio); 995132451Sroberto if (ThreadPriorityVerbose) { 996132451Sroberto tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", 997132451Sroberto osthr->thread_id(), osthr->lwp_id(), prio ); 998182007Sroberto } 999182007Sroberto os::set_native_priority(thread, prio); 1000132451Sroberto } 100154359Sroberto } else if (ThreadPriorityVerbose) { 1002132451Sroberto warning("Can't set priority in _start routine, thread id hasn't been set\n"); 100354359Sroberto } 100456746Sroberto 100556746Sroberto assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 100654359Sroberto 100754359Sroberto // initialize signal mask for this thread 100854359Sroberto os::Solaris::hotspot_sigmask(thread); 100982498Sroberto 101054359Sroberto thread->run(); 101154359Sroberto 101254359Sroberto // One less thread is executing 101354359Sroberto // When the VMThread gets here, the main thread may have already exited 101454359Sroberto // which frees the CodeHeap containing the Atomic::dec code 101554359Sroberto if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 101682498Sroberto Atomic::dec(&os::Solaris::_os_thread_count); 101782498Sroberto } 101882498Sroberto 101982498Sroberto if (UseDetachedThreads) { 102082498Sroberto thr_exit(NULL); 102182498Sroberto ShouldNotReachHere(); 102282498Sroberto } 102354359Sroberto return NULL; 102482498Sroberto} 102554359Sroberto 102654359Srobertostatic OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 102754359Sroberto // Allocate the OSThread object 102854359Sroberto OSThread* osthread = new OSThread(NULL, NULL); 102954359Sroberto if (osthread == NULL) return NULL; 103054359Sroberto 103154359Sroberto // Store info on the Solaris thread into the OSThread 103254359Sroberto osthread->set_thread_id(thread_id); 103354359Sroberto osthread->set_lwp_id(_lwp_self()); 103454359Sroberto thread->_schedctl = (void *) schedctl_init () ; 103554359Sroberto 103654359Sroberto if (UseNUMA) { 103754359Sroberto int lgrp_id = os::numa_get_group_id(); 103854359Sroberto if (lgrp_id != -1) { 103954359Sroberto thread->set_lgrp_id(lgrp_id); 104054359Sroberto } 104154359Sroberto } 104254359Sroberto 104354359Sroberto if ( ThreadPriorityVerbose ) { 104454359Sroberto tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 104554359Sroberto osthread->thread_id(), osthread->lwp_id() ); 104654359Sroberto } 104754359Sroberto 104854359Sroberto // Initial thread state is INITIALIZED, not SUSPENDED 1049132451Sroberto osthread->set_state(INITIALIZED); 1050132451Sroberto 105154359Sroberto return osthread; 105254359Sroberto} 105354359Sroberto 105454359Srobertovoid os::Solaris::hotspot_sigmask(Thread* thread) { 105554359Sroberto 105654359Sroberto //Save caller's signal mask 105754359Sroberto sigset_t sigmask; 105854359Sroberto thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 105954359Sroberto OSThread *osthread = thread->osthread(); 106054359Sroberto osthread->set_caller_sigmask(sigmask); 106154359Sroberto 106254359Sroberto thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 106354359Sroberto if (!ReduceSignalUsage) { 106454359Sroberto if (thread->is_VM_thread()) { 106554359Sroberto // Only the VM thread handles BREAK_SIGNAL ... 106654359Sroberto thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 106754359Sroberto } else { 106882498Sroberto // ... all other threads block BREAK_SIGNAL 106982498Sroberto assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 107082498Sroberto thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1071132451Sroberto } 107282498Sroberto } 107354359Sroberto} 107482498Sroberto 107554359Srobertobool os::create_attached_thread(JavaThread* thread) { 107654359Sroberto#ifdef ASSERT 107782498Sroberto thread->verify_not_published(); 107882498Sroberto#endif 107982498Sroberto OSThread* osthread = create_os_thread(thread, thr_self()); 108082498Sroberto if (osthread == NULL) { 108182498Sroberto return false; 108282498Sroberto } 108354359Sroberto 108454359Sroberto // Initial thread state is RUNNABLE 108554359Sroberto osthread->set_state(RUNNABLE); 108654359Sroberto thread->set_osthread(osthread); 108754359Sroberto 108882498Sroberto // initialize signal mask for this thread 108954359Sroberto // and save the caller's signal mask 109054359Sroberto os::Solaris::hotspot_sigmask(thread); 1091132451Sroberto 1092132451Sroberto return true; 109354359Sroberto} 1094132451Sroberto 1095132451Srobertobool os::create_main_thread(JavaThread* thread) { 1096132451Sroberto#ifdef ASSERT 1097132451Sroberto thread->verify_not_published(); 1098132451Sroberto#endif 1099132451Sroberto if (_starting_thread == NULL) { 1100132451Sroberto _starting_thread = create_os_thread(thread, main_thread); 110182498Sroberto if (_starting_thread == NULL) { 110282498Sroberto return false; 1103132451Sroberto } 1104132451Sroberto } 1105132451Sroberto 1106132451Sroberto // The primodial thread is runnable from the start 1107132451Sroberto _starting_thread->set_state(RUNNABLE); 1108132451Sroberto 110982498Sroberto thread->set_osthread(_starting_thread); 111082498Sroberto 111182498Sroberto // initialize signal mask for this thread 1112132451Sroberto // and save the caller's signal mask 111382498Sroberto os::Solaris::hotspot_sigmask(thread); 111482498Sroberto 111582498Sroberto return true; 1116132451Sroberto} 1117132451Sroberto 1118132451Sroberto// _T2_libthread is true if we believe we are running with the newer 1119132451Sroberto// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1120132451Srobertobool os::Solaris::_T2_libthread = false; 112154359Sroberto 112254359Srobertobool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 112354359Sroberto // Allocate the OSThread object 112454359Sroberto OSThread* osthread = new OSThread(NULL, NULL); 112554359Sroberto if (osthread == NULL) { 112654359Sroberto return false; 112754359Sroberto } 112854359Sroberto 112954359Sroberto if ( ThreadPriorityVerbose ) { 1130182007Sroberto char *thrtyp; 1131182007Sroberto switch ( thr_type ) { 1132132451Sroberto case vm_thread: 113354359Sroberto thrtyp = (char *)"vm"; 113454359Sroberto break; 1135182007Sroberto case cgc_thread: 1136182007Sroberto thrtyp = (char *)"cgc"; 1137182007Sroberto break; 1138182007Sroberto case pgc_thread: 1139182007Sroberto thrtyp = (char *)"pgc"; 1140182007Sroberto break; 1141182007Sroberto case java_thread: 1142182007Sroberto thrtyp = (char *)"java"; 1143182007Sroberto break; 1144182007Sroberto case compiler_thread: 1145182007Sroberto thrtyp = (char *)"compiler"; 1146182007Sroberto break; 114782498Sroberto case watcher_thread: 114854359Sroberto thrtyp = (char *)"watcher"; 1149182007Sroberto break; 1150182007Sroberto default: 1151182007Sroberto thrtyp = (char *)"unknown"; 1152182007Sroberto break; 1153182007Sroberto } 1154132451Sroberto tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 115554359Sroberto } 115654359Sroberto 115756746Sroberto // Calculate stack size if it's not specified by caller. 115856746Sroberto if (stack_size == 0) { 115956746Sroberto // The default stack size 1M (2M for LP64). 116054359Sroberto stack_size = (BytesPerWord >> 2) * K * K; 116182498Sroberto 116256746Sroberto switch (thr_type) { 116356746Sroberto case os::java_thread: 116456746Sroberto // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 116556746Sroberto if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 116656746Sroberto break; 116756746Sroberto case os::compiler_thread: 116856746Sroberto if (CompilerThreadStackSize > 0) { 116956746Sroberto stack_size = (size_t)(CompilerThreadStackSize * K); 117056746Sroberto break; 117156746Sroberto } // else fall through: 117256746Sroberto // use VMThreadStackSize if CompilerThreadStackSize is not defined 117356746Sroberto case os::vm_thread: 117456746Sroberto case os::pgc_thread: 117556746Sroberto case os::cgc_thread: 117682498Sroberto case os::watcher_thread: 117756746Sroberto if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 117882498Sroberto break; 117982498Sroberto } 118082498Sroberto } 118182498Sroberto stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 118282498Sroberto 118356746Sroberto // Initial state is ALLOCATED but not INITIALIZED 118456746Sroberto osthread->set_state(ALLOCATED); 118582498Sroberto 118682498Sroberto if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 118782498Sroberto // We got lots of threads. Check if we still have some address space left. 118856746Sroberto // Need to be at least 5Mb of unreserved address space. We do check by 118956746Sroberto // trying to reserve some. 119082498Sroberto const size_t VirtualMemoryBangSize = 20*K*K; 119182498Sroberto char* mem = os::reserve_memory(VirtualMemoryBangSize); 119282498Sroberto if (mem == NULL) { 119382498Sroberto delete osthread; 119456746Sroberto return false; 119556746Sroberto } else { 119656746Sroberto // Release the memory again 119756746Sroberto os::release_memory(mem, VirtualMemoryBangSize); 119856746Sroberto } 119956746Sroberto } 120056746Sroberto 120156746Sroberto // Setup osthread because the child thread may need it. 120282498Sroberto thread->set_osthread(osthread); 120354359Sroberto 120456746Sroberto // Create the Solaris thread 120554359Sroberto // explicit THR_BOUND for T2_libthread case in case 120654359Sroberto // that assumption is not accurate, but our alternate signal stack 120754359Sroberto // handling is based on it which must have bound threads 120854359Sroberto thread_t tid = 0; 120954359Sroberto long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 121054359Sroberto | ((UseBoundThreads || os::Solaris::T2_libthread() || 121154359Sroberto (thr_type == vm_thread) || 121282498Sroberto (thr_type == cgc_thread) || 121354359Sroberto (thr_type == pgc_thread) || 121456746Sroberto (thr_type == compiler_thread && BackgroundCompilation)) ? 121554359Sroberto THR_BOUND : 0); 121654359Sroberto int status; 121754359Sroberto 121854359Sroberto // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 121954359Sroberto // 122054359Sroberto // On multiprocessors systems, libthread sometimes under-provisions our 122154359Sroberto // process with LWPs. On a 30-way systems, for instance, we could have 122282498Sroberto // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 122354359Sroberto // to our process. This can result in under utilization of PEs. 122454359Sroberto // I suspect the problem is related to libthread's LWP 122556746Sroberto // pool management and to the kernel's SIGBLOCKING "last LWP parked" 122654359Sroberto // upcall policy. 122754359Sroberto // 122854359Sroberto // The following code is palliative -- it attempts to ensure that our 122954359Sroberto // process has sufficient LWPs to take advantage of multiple PEs. 123082498Sroberto // Proper long-term cures include using user-level threads bound to LWPs 123154359Sroberto // (THR_BOUND) or using LWP-based synchronization. Note that there is a 123254359Sroberto // slight timing window with respect to sampling _os_thread_count, but 123356746Sroberto // the race is benign. Also, we should periodically recompute 123454359Sroberto // _processors_online as the min of SC_NPROCESSORS_ONLN and the 123554359Sroberto // the number of PEs in our partition. You might be tempted to use 123654359Sroberto // THR_NEW_LWP here, but I'd recommend against it as that could 123754359Sroberto // result in undesirable growth of the libthread's LWP pool. 123854359Sroberto // The fix below isn't sufficient; for instance, it doesn't take into count 123954359Sroberto // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 124054359Sroberto // 124154359Sroberto // Some pathologies this scheme doesn't handle: 124254359Sroberto // * Threads can block, releasing the LWPs. The LWPs can age out. 124354359Sroberto // When a large number of threads become ready again there aren't 124482498Sroberto // enough LWPs available to service them. This can occur when the 124582498Sroberto // number of ready threads oscillates. 124682498Sroberto // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 124782498Sroberto // 124882498Sroberto // Finally, we should call thr_setconcurrency() periodically to refresh 124982498Sroberto // the LWP pool and thwart the LWP age-out mechanism. 125054359Sroberto // The "+3" term provides a little slop -- we want to slightly overprovision. 125154359Sroberto 125256746Sroberto if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 125354359Sroberto if (!(flags & THR_BOUND)) { 125454359Sroberto thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 125554359Sroberto } 125654359Sroberto } 125754359Sroberto // Although this doesn't hurt, we should warn of undefined behavior 125854359Sroberto // when using unbound T1 threads with schedctl(). This should never 125954359Sroberto // happen, as the compiler and VM threads are always created bound 126054359Sroberto DEBUG_ONLY( 126154359Sroberto if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 126254359Sroberto (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 126382498Sroberto ((thr_type == vm_thread) || (thr_type == cgc_thread) || 126482498Sroberto (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 126582498Sroberto warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 126682498Sroberto } 126782498Sroberto ); 126882498Sroberto 126956746Sroberto 127054359Sroberto // Mark that we don't have an lwp or thread id yet. 127154359Sroberto // In case we attempt to set the priority before the thread starts. 127282498Sroberto osthread->set_lwp_id(-1); 127354359Sroberto osthread->set_thread_id(-1); 127482498Sroberto 127554359Sroberto status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1276132451Sroberto if (status != 0) { 1277132451Sroberto if (PrintMiscellaneous && (Verbose || WizardMode)) { 127882498Sroberto perror("os::create_thread"); 127982498Sroberto } 128082498Sroberto thread->set_osthread(NULL); 128182498Sroberto // Need to clean up stuff we've allocated so far 128282498Sroberto delete osthread; 128382498Sroberto return false; 128482498Sroberto } 1285132451Sroberto 128682498Sroberto Atomic::inc(&os::Solaris::_os_thread_count); 1287132451Sroberto 128882498Sroberto // Store info on the Solaris thread into the OSThread 1289132451Sroberto osthread->set_thread_id(tid); 1290132451Sroberto 1291132451Sroberto // Remember that we created this thread so we can set priority on it 1292132451Sroberto osthread->set_vm_created(); 1293132451Sroberto 129454359Sroberto // Set the default thread priority otherwise use NormalPriority 129554359Sroberto 129654359Sroberto if ( UseThreadPriorities ) { 129754359Sroberto thr_setprio(tid, (DefaultThreadPriority == -1) ? 129854359Sroberto java_to_os_priority[NormPriority] : 129954359Sroberto DefaultThreadPriority); 130054359Sroberto } 130154359Sroberto 130254359Sroberto // Initial thread state is INITIALIZED, not SUSPENDED 130354359Sroberto osthread->set_state(INITIALIZED); 1304132451Sroberto 1305182007Sroberto // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 130654359Sroberto return true; 130782498Sroberto} 130882498Sroberto 130982498Sroberto/* defined for >= Solaris 10. This allows builds on earlier versions 131082498Sroberto * of Solaris to take advantage of the newly reserved Solaris JVM signals 131182498Sroberto * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 131254359Sroberto * and -XX:+UseAltSigs does nothing since these should have no conflict 131382498Sroberto */ 131482498Sroberto#if !defined(SIGJVM1) 131582498Sroberto#define SIGJVM1 39 131682498Sroberto#define SIGJVM2 40 131754359Sroberto#endif 131854359Sroberto 131954359Srobertodebug_only(static bool signal_sets_initialized = false); 132054359Srobertostatic sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 132154359Srobertoint os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1322132451Srobertoint os::Solaris::_SIGasync = ASYNC_SIGNAL; 132354359Sroberto 132482498Srobertobool os::Solaris::is_sig_ignored(int sig) { 132554359Sroberto struct sigaction oact; 132654359Sroberto sigaction(sig, (struct sigaction*)NULL, &oact); 132754359Sroberto void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 132854359Sroberto : CAST_FROM_FN_PTR(void*, oact.sa_handler); 132954359Sroberto if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 133082498Sroberto return true; 133154359Sroberto else 133254359Sroberto return false; 133354359Sroberto} 133454359Sroberto 133554359Sroberto// Note: SIGRTMIN is a macro that calls sysconf() so it will 133654359Sroberto// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 133754359Srobertostatic bool isJVM1available() { 133854359Sroberto return SIGJVM1 < SIGRTMIN; 133954359Sroberto} 134054359Sroberto 134154359Srobertovoid os::Solaris::signal_sets_init() { 134254359Sroberto // Should also have an assertion stating we are still single-threaded. 134354359Sroberto assert(!signal_sets_initialized, "Already initialized"); 134454359Sroberto // Fill in signals that are necessarily unblocked for all threads in 134554359Sroberto // the VM. Currently, we unblock the following signals: 134654359Sroberto // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 134754359Sroberto // by -Xrs (=ReduceSignalUsage)); 134854359Sroberto // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 134954359Sroberto // other threads. The "ReduceSignalUsage" boolean tells us not to alter 135054359Sroberto // the dispositions or masks wrt these signals. 135154359Sroberto // Programs embedding the VM that want to use the above signals for their 135254359Sroberto // own purposes must, at this time, use the "-Xrs" option to prevent 135354359Sroberto // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 135454359Sroberto // (See bug 4345157, and other related bugs). 135554359Sroberto // In reality, though, unblocking these signals is really a nop, since 135654359Sroberto // these signals are not blocked by default. 135754359Sroberto sigemptyset(&unblocked_sigs); 135854359Sroberto sigemptyset(&allowdebug_blocked_sigs); 135954359Sroberto sigaddset(&unblocked_sigs, SIGILL); 136054359Sroberto sigaddset(&unblocked_sigs, SIGSEGV); 136154359Sroberto sigaddset(&unblocked_sigs, SIGBUS); 136254359Sroberto sigaddset(&unblocked_sigs, SIGFPE); 136354359Sroberto 136454359Sroberto if (isJVM1available) { 136554359Sroberto os::Solaris::set_SIGinterrupt(SIGJVM1); 136682498Sroberto os::Solaris::set_SIGasync(SIGJVM2); 136754359Sroberto } else if (UseAltSigs) { 136854359Sroberto os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 136954359Sroberto os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 137054359Sroberto } else { 137154359Sroberto os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1372132451Sroberto os::Solaris::set_SIGasync(ASYNC_SIGNAL); 137356746Sroberto } 137454359Sroberto 137554359Sroberto sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 137654359Sroberto sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 137754359Sroberto 137854359Sroberto if (!ReduceSignalUsage) { 137954359Sroberto if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 138054359Sroberto sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1381182007Sroberto sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 138254359Sroberto } 138382498Sroberto if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1384182007Sroberto sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 138554359Sroberto sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 138682498Sroberto } 138754359Sroberto if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 138882498Sroberto sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 138954359Sroberto sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 139054359Sroberto } 139154359Sroberto } 139254359Sroberto // Fill in signals that are blocked by all but the VM thread. 139354359Sroberto sigemptyset(&vm_sigs); 139482498Sroberto if (!ReduceSignalUsage) 139554359Sroberto sigaddset(&vm_sigs, BREAK_SIGNAL); 139682498Sroberto debug_only(signal_sets_initialized = true); 1397182007Sroberto 139882498Sroberto // For diagnostics only used in run_periodic_checks 139982498Sroberto sigemptyset(&check_signal_done); 1400182007Sroberto} 140182498Sroberto 140282498Sroberto// These are signals that are unblocked while a thread is running Java. 140382498Sroberto// (For some reason, they get blocked by default.) 140482498Srobertosigset_t* os::Solaris::unblocked_signals() { 140582498Sroberto assert(signal_sets_initialized, "Not initialized"); 140654359Sroberto return &unblocked_sigs; 140754359Sroberto} 140854359Sroberto 140982498Sroberto// These are the signals that are blocked while a (non-VM) thread is 141054359Sroberto// running Java. Only the VM thread handles these signals. 141154359Srobertosigset_t* os::Solaris::vm_signals() { 141254359Sroberto assert(signal_sets_initialized, "Not initialized"); 141354359Sroberto return &vm_sigs; 141454359Sroberto} 141554359Sroberto 141682498Sroberto// These are signals that are blocked during cond_wait to allow debugger in 141754359Srobertosigset_t* os::Solaris::allowdebug_blocked_signals() { 141882498Sroberto assert(signal_sets_initialized, "Not initialized"); 1419182007Sroberto return &allowdebug_blocked_sigs; 142082498Sroberto} 142182498Sroberto 1422182007Sroberto// First crack at OS-specific initialization, from inside the new thread. 142382498Srobertovoid os::initialize_thread() { 1424132451Sroberto int r = thr_main() ; 142582498Sroberto guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 142682498Sroberto if (r) { 142782498Sroberto JavaThread* jt = (JavaThread *)Thread::current(); 142882498Sroberto assert(jt != NULL,"Sanity check"); 142982498Sroberto size_t stack_size; 143082498Sroberto address base = jt->stack_base(); 143182498Sroberto if (Arguments::created_by_java_launcher()) { 143282498Sroberto // Use 2MB to allow for Solaris 7 64 bit mode. 1433182007Sroberto stack_size = JavaThread::stack_size_at_create() == 0 1434182007Sroberto ? 2048*K : JavaThread::stack_size_at_create(); 1435182007Sroberto 1436132451Sroberto // There are rare cases when we may have already used more than 143782498Sroberto // the basic stack size allotment before this method is invoked. 143882498Sroberto // Attempt to allow for a normally sized java_stack. 143982498Sroberto size_t current_stack_offset = (size_t)(base - (address)&stack_size); 144082498Sroberto stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 144182498Sroberto } else { 1442182007Sroberto // 6269555: If we were not created by a Java launcher, i.e. if we are 144354359Sroberto // running embedded in a native application, treat the primordial thread 144454359Sroberto // as much like a native attached thread as possible. This means using 144554359Sroberto // the current stack size from thr_stksegment(), unless it is too large 144682498Sroberto // to reliably setup guard pages. A reasonable max size is 8MB. 144754359Sroberto size_t current_size = current_stack_size(); 144854359Sroberto // This should never happen, but just in case.... 144954359Sroberto if (current_size == 0) current_size = 2 * K * K; 145054359Sroberto stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 145154359Sroberto } 145254359Sroberto address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 145354359Sroberto stack_size = (size_t)(base - bottom); 1454132451Sroberto 1455132451Sroberto assert(stack_size > 0, "Stack size calculation problem"); 1456132451Sroberto 1457132451Sroberto if (stack_size > jt->stack_size()) { 145854359Sroberto NOT_PRODUCT( 145954359Sroberto struct rlimit limits; 1460132451Sroberto getrlimit(RLIMIT_STACK, &limits); 1461182007Sroberto size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1462132451Sroberto assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1463132451Sroberto ) 1464132451Sroberto tty->print_cr( 1465132451Sroberto "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1466132451Sroberto "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1467132451Sroberto "See limit(1) to increase the stack size limit.", 1468132451Sroberto stack_size / K, jt->stack_size() / K); 1469132451Sroberto vm_exit(1); 1470182007Sroberto } 1471132451Sroberto assert(jt->stack_size() >= stack_size, 1472132451Sroberto "Attempt to map more stack than was allocated"); 1473132451Sroberto jt->set_stack_size(stack_size); 147454359Sroberto } 1475132451Sroberto 1476132451Sroberto // 5/22/01: Right now alternate signal stacks do not handle 1477132451Sroberto // throwing stack overflow exceptions, see bug 4463178 1478132451Sroberto // Until a fix is found for this, T2 will NOT imply alternate signal 1479132451Sroberto // stacks. 1480132451Sroberto // If using T2 libthread threads, install an alternate signal stack. 1481132451Sroberto // Because alternate stacks associate with LWPs on Solaris, 1482132451Sroberto // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1483132451Sroberto // we prefer to explicitly stack bang. 1484132451Sroberto // If not using T2 libthread, but using UseBoundThreads any threads 1485132451Sroberto // (primordial thread, jni_attachCurrentThread) we do not create, 1486132451Sroberto // probably are not bound, therefore they can not have an alternate 1487132451Sroberto // signal stack. Since our stack banging code is generated and 1488132451Sroberto // is shared across threads, all threads must be bound to allow 1489132451Sroberto // using alternate signal stacks. The alternative is to interpose 1490132451Sroberto // on _lwp_create to associate an alt sig stack with each LWP, 1491132451Sroberto // and this could be a problem when the JVM is embedded. 1492132451Sroberto // We would prefer to use alternate signal stacks with T2 1493132451Sroberto // Since there is currently no accurate way to detect T2 1494132451Sroberto // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1495182007Sroberto // on installing alternate signal stacks 1496182007Sroberto 1497182007Sroberto 1498182007Sroberto // 05/09/03: removed alternate signal stack support for Solaris 1499182007Sroberto // The alternate signal stack mechanism is no longer needed to 1500182007Sroberto // handle stack overflow. This is now handled by allocating 1501182007Sroberto // guard pages (red zone) and stackbanging. 1502182007Sroberto // Initially the alternate signal stack mechanism was removed because 1503182007Sroberto // it did not work with T1 llibthread. Alternate 1504182007Sroberto // signal stacks MUST have all threads bound to lwps. Applications 1505182007Sroberto // can create their own threads and attach them without their being 1506132451Sroberto // bound under T1. This is frequently the case for the primordial thread. 1507132451Sroberto // If we were ever to reenable this mechanism we would need to 1508132451Sroberto // use the dynamic check for T2 libthread. 1509132451Sroberto 1510132451Sroberto os::Solaris::init_thread_fpu_state(); 1511132451Sroberto} 1512132451Sroberto 1513132451Sroberto 1514132451Sroberto 1515132451Sroberto// Free Solaris resources related to the OSThread 1516132451Srobertovoid os::free_thread(OSThread* osthread) { 1517132451Sroberto assert(osthread != NULL, "os::free_thread but osthread not set"); 1518182007Sroberto 1519132451Sroberto 1520132451Sroberto // We are told to free resources of the argument thread, 1521182007Sroberto // but we can only really operate on the current thread. 1522132451Sroberto // The main thread must take the VMThread down synchronously 1523132451Sroberto // before the main thread exits and frees up CodeHeap 1524132451Sroberto guarantee((Thread::current()->osthread() == osthread 1525182007Sroberto || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1526132451Sroberto if (Thread::current()->osthread() == osthread) { 1527132451Sroberto // Restore caller's signal mask 1528132451Sroberto sigset_t sigmask = osthread->caller_sigmask(); 1529182007Sroberto thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1530182007Sroberto } 1531132451Sroberto delete osthread; 1532132451Sroberto} 1533132451Sroberto 1534132451Srobertovoid os::pd_start_thread(Thread* thread) { 1535132451Sroberto int status = thr_continue(thread->osthread()->thread_id()); 1536132451Sroberto assert_status(status == 0, status, "thr_continue failed"); 1537132451Sroberto} 1538132451Sroberto 1539132451Sroberto 1540132451Srobertointx os::current_thread_id() { 1541182007Sroberto return (intx)thr_self(); 1542132451Sroberto} 1543132451Sroberto 1544182007Srobertostatic pid_t _initial_pid = 0; 1545132451Sroberto 1546132451Srobertoint os::current_process_id() { 1547182007Sroberto return (int)(_initial_pid ? _initial_pid : getpid()); 1548132451Sroberto} 1549132451Sroberto 1550182007Srobertoint os::allocate_thread_local_storage() { 1551182007Sroberto // %%% in Win32 this allocates a memory segment pointed to by a 1552132451Sroberto // register. Dan Stein can implement a similar feature in 1553132451Sroberto // Solaris. Alternatively, the VM can do the same thing 1554132451Sroberto // explicitly: malloc some storage and keep the pointer in a 1555132451Sroberto // register (which is part of the thread's context) (or keep it 1556132451Sroberto // in TLS). 1557132451Sroberto // %%% In current versions of Solaris, thr_self and TSD can 1558132451Sroberto // be accessed via short sequences of displaced indirections. 1559132451Sroberto // The value of thr_self is available as %g7(36). 1560132451Sroberto // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1561132451Sroberto // assuming that the current thread already has a value bound to k. 1562132451Sroberto // It may be worth experimenting with such access patterns, 1563132451Sroberto // and later having the parameters formally exported from a Solaris 1564132451Sroberto // interface. I think, however, that it will be faster to 1565182007Sroberto // maintain the invariant that %g2 always contains the 1566132451Sroberto // JavaThread in Java code, and have stubs simply 1567182007Sroberto // treat %g2 as a caller-save register, preserving it in a %lN. 1568132451Sroberto thread_key_t tk; 1569132451Sroberto if (thr_keycreate( &tk, NULL ) ) 1570132451Sroberto fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); 1571132451Sroberto return int(tk); 1572132451Sroberto} 1573132451Sroberto 1574132451Srobertovoid os::free_thread_local_storage(int index) { 1575132451Sroberto // %%% don't think we need anything here 1576132451Sroberto // if ( pthread_key_delete((pthread_key_t) tk) ) 1577132451Sroberto // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1578132451Sroberto} 1579132451Sroberto 1580132451Sroberto#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1581132451Sroberto // small number - point is NO swap space available 1582132451Srobertovoid os::thread_local_storage_at_put(int index, void* value) { 1583182007Sroberto // %%% this is used only in threadLocalStorage.cpp 1584182007Sroberto if (thr_setspecific((thread_key_t)index, value)) { 1585132451Sroberto if (errno == ENOMEM) { 1586132451Sroberto vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1587132451Sroberto } else { 1588132451Sroberto fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); 1589132451Sroberto } 1590132451Sroberto } else { 1591132451Sroberto ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1592132451Sroberto } 1593132451Sroberto} 1594132451Sroberto 1595132451Sroberto// This function could be called before TLS is initialized, for example, when 1596132451Sroberto// VM receives an async signal or when VM causes a fatal error during 1597132451Sroberto// initialization. Return NULL if thr_getspecific() fails. 1598132451Srobertovoid* os::thread_local_storage_at(int index) { 1599132451Sroberto // %%% this is used only in threadLocalStorage.cpp 1600132451Sroberto void* r = NULL; 1601132451Sroberto return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1602132451Sroberto} 1603132451Sroberto 1604132451Sroberto 1605132451Srobertoconst int NANOSECS_PER_MILLISECS = 1000000; 1606132451Sroberto// gethrtime can move backwards if read from one cpu and then a different cpu 1607132451Sroberto// getTimeNanos is guaranteed to not move backward on Solaris 1608132451Sroberto// local spinloop created as faster for a CAS on an int than 1609132451Sroberto// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1610132451Sroberto// supported on sparc v8 or pre supports_cx8 intel boxes. 1611132451Sroberto// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1612132451Sroberto// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1613132451Srobertoinline hrtime_t oldgetTimeNanos() { 1614182007Sroberto int gotlock = LOCK_INVALID; 1615132451Sroberto hrtime_t newtime = gethrtime(); 1616132451Sroberto 1617132451Sroberto for (;;) { 1618132451Sroberto// grab lock for max_hrtime 1619182007Sroberto int curlock = max_hrtime_lock; 1620132451Sroberto if (curlock & LOCK_BUSY) continue; 1621132451Sroberto if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1622132451Sroberto if (newtime > max_hrtime) { 1623132451Sroberto max_hrtime = newtime; 1624132451Sroberto } else { 1625132451Sroberto newtime = max_hrtime; 1626132451Sroberto } 1627132451Sroberto // release lock 1628132451Sroberto max_hrtime_lock = LOCK_FREE; 1629132451Sroberto return newtime; 1630132451Sroberto } 1631132451Sroberto} 1632132451Sroberto// gethrtime can move backwards if read from one cpu and then a different cpu 1633132451Sroberto// getTimeNanos is guaranteed to not move backward on Solaris 1634182007Srobertoinline hrtime_t getTimeNanos() { 1635132451Sroberto if (VM_Version::supports_cx8()) { 1636132451Sroberto bool retry = false; 1637132451Sroberto hrtime_t newtime = gethrtime(); 1638132451Sroberto hrtime_t oldmaxtime = max_hrtime; 1639132451Sroberto hrtime_t retmaxtime = oldmaxtime; 1640132451Sroberto while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) { 1641132451Sroberto oldmaxtime = retmaxtime; 1642132451Sroberto retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime); 1643132451Sroberto retry = true; 1644132451Sroberto } 1645132451Sroberto return (newtime > retmaxtime) ? newtime : retmaxtime; 1646132451Sroberto } else { 1647132451Sroberto return oldgetTimeNanos(); 1648132451Sroberto } 1649132451Sroberto} 1650132451Sroberto 1651132451Sroberto// Time since start-up in seconds to a fine granularity. 1652132451Sroberto// Used by VMSelfDestructTimer and the MemProfiler. 1653132451Srobertodouble os::elapsedTime() { 1654132451Sroberto return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1655132451Sroberto} 1656132451Sroberto 1657182007Srobertojlong os::elapsed_counter() { 1658182007Sroberto return (jlong)(getTimeNanos() - first_hrtime); 1659182007Sroberto} 1660182007Sroberto 1661182007Srobertojlong os::elapsed_frequency() { 1662182007Sroberto return hrtime_hz; 1663182007Sroberto} 1664182007Sroberto 1665182007Sroberto// Return the real, user, and system times in seconds from an 1666182007Sroberto// arbitrary fixed point in the past. 1667182007Srobertobool os::getTimesSecs(double* process_real_time, 1668182007Sroberto double* process_user_time, 1669182007Sroberto double* process_system_time) { 1670182007Sroberto struct tms ticks; 1671132451Sroberto clock_t real_ticks = times(&ticks); 1672132451Sroberto 1673132451Sroberto if (real_ticks == (clock_t) (-1)) { 1674132451Sroberto return false; 1675132451Sroberto } else { 1676132451Sroberto double ticks_per_second = (double) clock_tics_per_sec; 1677182007Sroberto *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1678182007Sroberto *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1679182007Sroberto // For consistency return the real time from getTimeNanos() 1680182007Sroberto // converted to seconds. 1681132451Sroberto *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1682132451Sroberto 1683132451Sroberto return true; 1684132451Sroberto } 1685182007Sroberto} 1686182007Sroberto 1687182007Sroberto// Used internally for comparisons only 1688182007Sroberto// getTimeMillis guaranteed to not move backwards on Solaris 1689182007Srobertojlong getTimeMillis() { 1690182007Sroberto jlong nanotime = getTimeNanos(); 1691182007Sroberto return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1692182007Sroberto} 1693182007Sroberto 1694182007Sroberto// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1695182007Srobertojlong os::javaTimeMillis() { 1696182007Sroberto timeval t; 1697132451Sroberto if (gettimeofday( &t, NULL) == -1) 1698182007Sroberto fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); 1699132451Sroberto return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1700132451Sroberto} 1701132451Sroberto 1702132451Srobertojlong os::javaTimeNanos() { 1703132451Sroberto return (jlong)getTimeNanos(); 1704132451Sroberto} 1705182007Sroberto 1706182007Srobertovoid os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1707182007Sroberto info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1708182007Sroberto info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1709132451Sroberto info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1710132451Sroberto info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1711132451Sroberto} 1712132451Sroberto 1713132451Srobertochar * os::local_time_string(char *buf, size_t buflen) { 1714132451Sroberto struct tm t; 1715182007Sroberto time_t long_time; 1716132451Sroberto time(&long_time); 1717132451Sroberto localtime_r(&long_time, &t); 1718182007Sroberto jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1719132451Sroberto t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1720132451Sroberto t.tm_hour, t.tm_min, t.tm_sec); 1721132451Sroberto return buf; 1722182007Sroberto} 1723132451Sroberto 1724182007Sroberto// Note: os::shutdown() might be called very early during initialization, or 1725132451Sroberto// called from signal handler. Before adding something to os::shutdown(), make 1726132451Sroberto// sure it is async-safe and can handle partially initialized VM. 1727132451Srobertovoid os::shutdown() { 1728132451Sroberto 1729132451Sroberto // allow PerfMemory to attempt cleanup of any persistent resources 1730132451Sroberto perfMemory_exit(); 1731132451Sroberto 1732132451Sroberto // needs to remove object in file system 1733132451Sroberto AttachListener::abort(); 1734132451Sroberto 1735132451Sroberto // flush buffered output, finish log files 1736182007Sroberto ostream_abort(); 1737132451Sroberto 1738132451Sroberto // Check for abort hook 1739132451Sroberto abort_hook_t abort_hook = Arguments::abort_hook(); 174054359Sroberto if (abort_hook != NULL) { 174154359Sroberto abort_hook(); 174254359Sroberto } 1743132451Sroberto} 174454359Sroberto 1745132451Sroberto// Note: os::abort() might be called very early during initialization, or 174682498Sroberto// called from signal handler. Before adding something to os::abort(), make 174782498Sroberto// sure it is async-safe and can handle partially initialized VM. 174882498Srobertovoid os::abort(bool dump_core) { 174982498Sroberto os::shutdown(); 175054359Sroberto if (dump_core) { 175154359Sroberto#ifndef PRODUCT 175254359Sroberto fdStream out(defaultStream::output_fd()); 175354359Sroberto out.print_raw("Current thread is "); 175482498Sroberto char buf[16]; 175554359Sroberto jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 175654359Sroberto out.print_raw_cr(buf); 175754359Sroberto out.print_raw_cr("Dumping core ..."); 175854359Sroberto#endif 175954359Sroberto ::abort(); // dump core (for debugging) 176054359Sroberto } 176182498Sroberto 176282498Sroberto ::exit(1); 176382498Sroberto} 176454359Sroberto 176554359Sroberto// Die immediately, no exit hook, no abort hook, no cleanup. 1766182007Srobertovoid os::die() { 176754359Sroberto _exit(-1); 1768182007Sroberto} 1769132451Sroberto 1770132451Sroberto// unused 1771132451Srobertovoid os::set_error_file(const char *logfile) {} 1772182007Sroberto 177354359Sroberto// DLL functions 1774182007Sroberto 177582498Srobertoconst char* os::dll_file_extension() { return ".so"; } 177654359Sroberto 177754359Srobertoconst char* os::get_temp_directory() { return "/tmp/"; } 177854359Sroberto 177954359Srobertoconst char* os::get_current_directory(char *buf, int buflen) { 178054359Sroberto return getcwd(buf, buflen); 178154359Sroberto} 178254359Sroberto 178354359Sroberto// check if addr is inside libjvm[_g].so 178454359Srobertobool os::address_is_in_vm(address addr) { 178554359Sroberto static address libjvm_base_addr; 178654359Sroberto Dl_info dlinfo; 178754359Sroberto 178854359Sroberto if (libjvm_base_addr == NULL) { 178954359Sroberto dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 179054359Sroberto libjvm_base_addr = (address)dlinfo.dli_fbase; 179154359Sroberto assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 179254359Sroberto } 179354359Sroberto 179454359Sroberto if (dladdr((void *)addr, &dlinfo)) { 179554359Sroberto if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 179654359Sroberto } 1797182007Sroberto 179854359Sroberto return false; 179954359Sroberto} 180054359Sroberto 180154359Srobertotypedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1802132451Srobertostatic dladdr1_func_type dladdr1_func = NULL; 180382498Sroberto 180456746Srobertobool os::dll_address_to_function_name(address addr, char *buf, 1805132451Sroberto int buflen, int * offset) { 180656746Sroberto Dl_info dlinfo; 180756746Sroberto 180882498Sroberto // dladdr1_func was initialized in os::init() 180956746Sroberto if (dladdr1_func){ 181056746Sroberto // yes, we have dladdr1 1811132451Sroberto 181256746Sroberto // Support for dladdr1 is checked at runtime; it may be 181356746Sroberto // available even if the vm is built on a machine that does 181456746Sroberto // not have dladdr1 support. Make sure there is a value for 1815132451Sroberto // RTLD_DL_SYMENT. 181682498Sroberto #ifndef RTLD_DL_SYMENT 1817132451Sroberto #define RTLD_DL_SYMENT 1 1818132451Sroberto #endif 1819132451Sroberto Sym * info; 1820132451Sroberto if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1821132451Sroberto RTLD_DL_SYMENT)) { 1822132451Sroberto if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1823132451Sroberto if (offset) *offset = addr - (address)dlinfo.dli_saddr; 182482498Sroberto 1825132451Sroberto // check if the returned symbol really covers addr 1826132451Sroberto return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); 1827132451Sroberto } else { 182854359Sroberto if (buf) buf[0] = '\0'; 1829132451Sroberto if (offset) *offset = -1; 1830132451Sroberto return false; 1831132451Sroberto } 1832132451Sroberto } else { 183354359Sroberto // no, only dladdr is available 1834132451Sroberto if(dladdr((void *)addr, &dlinfo)) { 1835132451Sroberto if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); 183682498Sroberto if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1837132451Sroberto return true; 183856746Sroberto } else { 183956746Sroberto if (buf) buf[0] = '\0'; 184054359Sroberto if (offset) *offset = -1; 1841132451Sroberto return false; 184254359Sroberto } 184354359Sroberto } 184482498Sroberto} 184554359Sroberto 184654359Srobertobool os::dll_address_to_library_name(address addr, char* buf, 1847132451Sroberto int buflen, int* offset) { 1848132451Sroberto Dl_info dlinfo; 1849132451Sroberto 185054359Sroberto if (dladdr((void*)addr, &dlinfo)){ 1851132451Sroberto if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1852132451Sroberto if (offset) *offset = addr - (address)dlinfo.dli_fbase; 185354359Sroberto return true; 185454359Sroberto } else { 185554359Sroberto if (buf) buf[0] = '\0'; 185654359Sroberto if (offset) *offset = -1; 1857132451Sroberto return false; 1858132451Sroberto } 1859132451Sroberto} 186054359Sroberto 186182498Sroberto// Prints the names and full paths of all opened dynamic libraries 186254359Sroberto// for current process 1863132451Srobertovoid os::print_dll_info(outputStream * st) { 186454359Sroberto Dl_info dli; 186554359Sroberto void *handle; 186682498Sroberto Link_map *map; 186754359Sroberto Link_map *p; 186854359Sroberto 1869132451Sroberto st->print_cr("Dynamic libraries:"); st->flush(); 187054359Sroberto 1871132451Sroberto if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 1872132451Sroberto st->print_cr("Error: Cannot print dynamic libraries."); 1873132451Sroberto return; 1874132451Sroberto } 1875132451Sroberto handle = dlopen(dli.dli_fname, RTLD_LAZY); 187654359Sroberto if (handle == NULL) { 1877132451Sroberto st->print_cr("Error: Cannot print dynamic libraries."); 1878132451Sroberto return; 1879132451Sroberto } 1880132451Sroberto dlinfo(handle, RTLD_DI_LINKMAP, &map); 188156746Sroberto if (map == NULL) { 1882132451Sroberto st->print_cr("Error: Cannot print dynamic libraries."); 188382498Sroberto return; 188482498Sroberto } 188582498Sroberto 1886132451Sroberto while (map->l_prev != NULL) 1887132451Sroberto map = map->l_prev; 1888132451Sroberto 1889132451Sroberto while (map != NULL) { 189082498Sroberto st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 1891132451Sroberto map = map->l_next; 1892132451Sroberto } 1893132451Sroberto 1894132451Sroberto dlclose(handle); 1895132451Sroberto} 1896132451Sroberto 1897132451Sroberto // Loads .dll/.so and 1898132451Sroberto // in case of error it checks if .dll/.so was built for the 189982498Sroberto // same architecture as Hotspot is running on 1900132451Sroberto 1901132451Srobertovoid * os::dll_load(const char *filename, char *ebuf, int ebuflen) 190282498Sroberto{ 1903132451Sroberto void * result= ::dlopen(filename, RTLD_LAZY); 190482498Sroberto if (result != NULL) { 1905132451Sroberto // Successful loading 190682498Sroberto return result; 1907132451Sroberto } 190882498Sroberto 1909132451Sroberto Elf32_Ehdr elf_head; 191082498Sroberto 191182498Sroberto // Read system error message into ebuf 191282498Sroberto // It may or may not be overwritten below 1913132451Sroberto ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1914132451Sroberto ebuf[ebuflen-1]='\0'; 1915132451Sroberto int diag_msg_max_length=ebuflen-strlen(ebuf); 191682498Sroberto char* diag_msg_buf=ebuf+strlen(ebuf); 1917132451Sroberto 1918132451Sroberto if (diag_msg_max_length==0) { 1919132451Sroberto // No more space in ebuf for additional diagnostics message 1920132451Sroberto return NULL; 1921132451Sroberto } 1922132451Sroberto 1923132451Sroberto 1924132451Sroberto int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 192582498Sroberto 1926132451Sroberto if (file_descriptor < 0) { 1927132451Sroberto // Can't open library, report dlerror() message 192882498Sroberto return NULL; 1929132451Sroberto } 193056746Sroberto 1931132451Sroberto bool failed_to_read_elf_head= 193254359Sroberto (sizeof(elf_head)!= 1933132451Sroberto (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 1934132451Sroberto 193582498Sroberto ::close(file_descriptor); 193682498Sroberto if (failed_to_read_elf_head) { 193782498Sroberto // file i/o error - report dlerror() msg 193882498Sroberto return NULL; 1939132451Sroberto } 1940132451Sroberto 194182498Sroberto typedef struct { 1942132451Sroberto Elf32_Half code; // Actual value as defined in elf.h 194382498Sroberto Elf32_Half compat_class; // Compatibility of archs at VM's sense 194482498Sroberto char elf_class; // 32 or 64 bit 194582498Sroberto char endianess; // MSB or LSB 194682498Sroberto char* name; // String representation 194782498Sroberto } arch_t; 1948132451Sroberto 1949132451Sroberto static const arch_t arch_array[]={ 1950132451Sroberto {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 195182498Sroberto {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1952132451Sroberto {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1953132451Sroberto {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1954132451Sroberto {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1955132451Sroberto {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1956132451Sroberto {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1957132451Sroberto {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1958132451Sroberto {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} 195982498Sroberto }; 196082498Sroberto 1961132451Sroberto #if (defined IA32) 1962132451Sroberto static Elf32_Half running_arch_code=EM_386; 1963132451Sroberto #elif (defined AMD64) 1964132451Sroberto static Elf32_Half running_arch_code=EM_X86_64; 1965132451Sroberto #elif (defined IA64) 1966132451Sroberto static Elf32_Half running_arch_code=EM_IA_64; 1967132451Sroberto #elif (defined __sparc) && (defined _LP64) 1968132451Sroberto static Elf32_Half running_arch_code=EM_SPARCV9; 196982498Sroberto #elif (defined __sparc) && (!defined _LP64) 1970132451Sroberto static Elf32_Half running_arch_code=EM_SPARC; 1971132451Sroberto #elif (defined __powerpc64__) 197282498Sroberto static Elf32_Half running_arch_code=EM_PPC64; 1973132451Sroberto #elif (defined __powerpc__) 1974132451Sroberto static Elf32_Half running_arch_code=EM_PPC; 1975132451Sroberto #else 1976132451Sroberto #error Method os::dll_load requires that one of following is defined:\ 1977132451Sroberto IA32, AMD64, IA64, __sparc, __powerpc__ 1978132451Sroberto #endif 1979132451Sroberto 1980132451Sroberto // Identify compatability class for VM's architecture and library's architecture 1981132451Sroberto // Obtain string descriptions for architectures 1982132451Sroberto 1983132451Sroberto arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1984132451Sroberto int running_arch_index=-1; 1985132451Sroberto 1986132451Sroberto for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 1987132451Sroberto if (running_arch_code == arch_array[i].code) { 1988132451Sroberto running_arch_index = i; 1989132451Sroberto } 1990132451Sroberto if (lib_arch.code == arch_array[i].code) { 1991132451Sroberto lib_arch.compat_class = arch_array[i].compat_class; 1992132451Sroberto lib_arch.name = arch_array[i].name; 1993132451Sroberto } 1994132451Sroberto } 1995132451Sroberto 199682498Sroberto assert(running_arch_index != -1, 199782498Sroberto "Didn't find running architecture code (running_arch_code) in arch_array"); 1998132451Sroberto if (running_arch_index == -1) { 1999132451Sroberto // Even though running architecture detection failed 2000132451Sroberto // we may still continue with reporting dlerror() message 2001182007Sroberto return NULL; 2002132451Sroberto } 2003132451Sroberto 2004182007Sroberto if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2005132451Sroberto ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2006132451Sroberto return NULL; 200782498Sroberto } 200854359Sroberto 2009132451Sroberto if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 201054359Sroberto ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2011182007Sroberto return NULL; 201282498Sroberto } 2013132451Sroberto 2014132451Sroberto if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2015132451Sroberto if ( lib_arch.name!=NULL ) { 2016182007Sroberto ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2017132451Sroberto " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2018132451Sroberto lib_arch.name, arch_array[running_arch_index].name); 2019132451Sroberto } else { 2020132451Sroberto ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2021132451Sroberto " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2022132451Sroberto lib_arch.code, 2023132451Sroberto arch_array[running_arch_index].name); 2024132451Sroberto } 2025132451Sroberto } 2026132451Sroberto 2027132451Sroberto return NULL; 2028132451Sroberto} 2029132451Sroberto 2030132451Sroberto 2031132451Sroberto 2032132451Srobertobool _print_ascii_file(const char* filename, outputStream* st) { 2033132451Sroberto int fd = open(filename, O_RDONLY); 2034132451Sroberto if (fd == -1) { 2035132451Sroberto return false; 2036132451Sroberto } 2037132451Sroberto 2038132451Sroberto char buf[32]; 2039132451Sroberto int bytes; 2040132451Sroberto while ((bytes = read(fd, buf, sizeof(buf))) > 0) { 2041132451Sroberto st->print_raw(buf, bytes); 2042132451Sroberto } 2043132451Sroberto 2044132451Sroberto close(fd); 2045132451Sroberto 2046132451Sroberto return true; 2047132451Sroberto} 2048132451Sroberto 2049132451Srobertovoid os::print_os_info(outputStream* st) { 2050132451Sroberto st->print("OS:"); 205182498Sroberto 2052132451Sroberto if (!_print_ascii_file("/etc/release", st)) { 205382498Sroberto st->print("Solaris"); 2054132451Sroberto } 2055132451Sroberto st->cr(); 2056132451Sroberto 2057132451Sroberto // kernel 2058132451Sroberto st->print("uname:"); 2059132451Sroberto struct utsname name; 2060132451Sroberto uname(&name); 2061132451Sroberto st->print(name.sysname); st->print(" "); 2062132451Sroberto st->print(name.release); st->print(" "); 2063132451Sroberto st->print(name.version); st->print(" "); 2064132451Sroberto st->print(name.machine); 206582498Sroberto 2066132451Sroberto // libthread 2067132451Sroberto if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 206882498Sroberto else st->print(" (T1 libthread)"); 2069132451Sroberto st->cr(); 207082498Sroberto 2071132451Sroberto // rlimit 207282498Sroberto st->print("rlimit:"); 2073132451Sroberto struct rlimit rlim; 2074132451Sroberto 2075132451Sroberto st->print(" STACK "); 2076132451Sroberto getrlimit(RLIMIT_STACK, &rlim); 2077132451Sroberto if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2078132451Sroberto else st->print("%uk", rlim.rlim_cur >> 10); 2079132451Sroberto 2080132451Sroberto st->print(", CORE "); 2081182007Sroberto getrlimit(RLIMIT_CORE, &rlim); 2082182007Sroberto if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2083182007Sroberto else st->print("%uk", rlim.rlim_cur >> 10); 2084182007Sroberto 2085182007Sroberto st->print(", NOFILE "); 2086182007Sroberto getrlimit(RLIMIT_NOFILE, &rlim); 2087132451Sroberto if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2088182007Sroberto else st->print("%d", rlim.rlim_cur); 2089182007Sroberto 2090182007Sroberto st->print(", AS "); 2091182007Sroberto getrlimit(RLIMIT_AS, &rlim); 2092182007Sroberto if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2093182007Sroberto else st->print("%uk", rlim.rlim_cur >> 10); 2094182007Sroberto st->cr(); 2095182007Sroberto 2096132451Sroberto // load average 2097182007Sroberto st->print("load average:"); 2098182007Sroberto double loadavg[3]; 2099182007Sroberto os::loadavg(loadavg, 3); 2100182007Sroberto st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2101182007Sroberto st->cr(); 2102182007Sroberto} 2103132451Sroberto 210482498Sroberto 2105182007Srobertostatic bool check_addr0(outputStream* st) { 2106182007Sroberto jboolean status = false; 2107182007Sroberto int fd = open("/proc/self/map",O_RDONLY); 2108182007Sroberto if (fd >= 0) { 2109182007Sroberto prmap_t p; 2110182007Sroberto while(read(fd, &p, sizeof(p)) > 0) { 2111182007Sroberto if (p.pr_vaddr == 0x0) { 2112182007Sroberto st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2113182007Sroberto st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2114182007Sroberto st->print("Access:"); 2115182007Sroberto st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2116182007Sroberto st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2117182007Sroberto st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2118182007Sroberto st->cr(); 2119182007Sroberto status = true; 2120182007Sroberto } 2121182007Sroberto close(fd); 2122182007Sroberto } 2123182007Sroberto } 2124182007Sroberto return status; 2125182007Sroberto} 2126182007Sroberto 2127182007Srobertovoid os::print_memory_info(outputStream* st) { 2128182007Sroberto st->print("Memory:"); 2129182007Sroberto st->print(" %dk page", os::vm_page_size()>>10); 2130182007Sroberto st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2131182007Sroberto st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2132182007Sroberto st->cr(); 2133182007Sroberto (void) check_addr0(st); 2134182007Sroberto} 2135182007Sroberto 2136182007Sroberto// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2137182007Sroberto// but they're the same for all the solaris architectures that we support. 2138182007Srobertoconst char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2139182007Sroberto "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2140182007Sroberto "ILL_COPROC", "ILL_BADSTK" }; 2141182007Sroberto 2142182007Srobertoconst char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 214382498Sroberto "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 214482498Sroberto "FPE_FLTINV", "FPE_FLTSUB" }; 214582498Sroberto 2146132451Srobertoconst char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 214782498Sroberto 2148132451Srobertoconst char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2149132451Sroberto 2150132451Srobertovoid os::print_siginfo(outputStream* st, void* siginfo) { 2151132451Sroberto st->print("siginfo:"); 2152132451Sroberto 2153132451Sroberto const int buflen = 100; 2154132451Sroberto char buf[buflen]; 2155132451Sroberto siginfo_t *si = (siginfo_t*)siginfo; 2156132451Sroberto st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2157132451Sroberto char *err = strerror(si->si_errno); 2158132451Sroberto if (si->si_errno != 0 && err != NULL) { 2159132451Sroberto st->print("si_errno=%s", err); 2160132451Sroberto } else { 2161132451Sroberto st->print("si_errno=%d", si->si_errno); 2162132451Sroberto } 2163132451Sroberto const int c = si->si_code; 216454359Sroberto assert(c > 0, "unexpected si_code"); 2165132451Sroberto switch (si->si_signo) { 2166132451Sroberto case SIGILL: 2167132451Sroberto st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2168132451Sroberto st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2169132451Sroberto break; 2170132451Sroberto case SIGFPE: 2171132451Sroberto st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2172132451Sroberto st->print(", si_addr=" PTR_FORMAT, si->si_addr); 217354359Sroberto break; 2174132451Sroberto case SIGSEGV: 2175132451Sroberto st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2176132451Sroberto st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2177132451Sroberto break; 2178132451Sroberto case SIGBUS: 2179132451Sroberto st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2180132451Sroberto st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2181132451Sroberto break; 2182132451Sroberto default: 2183132451Sroberto st->print(", si_code=%d", si->si_code); 2184182007Sroberto // no si_addr 218554359Sroberto } 2186132451Sroberto 2187132451Sroberto if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2188132451Sroberto UseSharedSpaces) { 2189132451Sroberto FileMapInfo* mapinfo = FileMapInfo::current_info(); 2190132451Sroberto if (mapinfo->is_in_shared_space(si->si_addr)) { 2191132451Sroberto st->print("\n\nError accessing class data sharing archive." \ 2192132451Sroberto " Mapped file inaccessible during execution, " \ 2193132451Sroberto " possible disk/network problem."); 2194182007Sroberto } 2195132451Sroberto } 2196132451Sroberto st->cr(); 2197132451Sroberto} 2198132451Sroberto 219954359Sroberto// Moved from whole group, because we need them here for diagnostic 220054359Sroberto// prints. 2201132451Sroberto#define OLDMAXSIGNUM 32 2202182007Srobertostatic int Maxsignum = 0; 2203132451Srobertostatic int *ourSigFlags = NULL; 2204132451Sroberto 220554359Srobertoextern "C" void sigINTRHandler(int, siginfo_t*, void*); 2206132451Sroberto 2207132451Srobertoint os::Solaris::get_our_sigflags(int sig) { 2208132451Sroberto assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2209132451Sroberto assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2210132451Sroberto return ourSigFlags[sig]; 2211132451Sroberto} 2212132451Sroberto 2213132451Srobertovoid os::Solaris::set_our_sigflags(int sig, int flags) { 2214132451Sroberto assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2215132451Sroberto assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2216132451Sroberto ourSigFlags[sig] = flags; 2217132451Sroberto} 2218132451Sroberto 2219132451Sroberto 2220132451Srobertostatic const char* get_signal_handler_name(address handler, 2221132451Sroberto char* buf, int buflen) { 2222132451Sroberto int offset; 2223132451Sroberto bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2224132451Sroberto if (found) { 2225132451Sroberto // skip directory names 2226132451Sroberto const char *p1, *p2; 2227132451Sroberto p1 = buf; 2228132451Sroberto size_t len = strlen(os::file_separator()); 2229132451Sroberto while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2230132451Sroberto jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2231132451Sroberto } else { 2232132451Sroberto jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2233132451Sroberto } 2234132451Sroberto return buf; 2235132451Sroberto} 2236132451Sroberto 2237132451Srobertostatic void print_signal_handler(outputStream* st, int sig, 2238132451Sroberto char* buf, size_t buflen) { 2239132451Sroberto struct sigaction sa; 2240132451Sroberto 2241132451Sroberto sigaction(sig, NULL, &sa); 2242132451Sroberto 2243132451Sroberto st->print("%s: ", os::exception_name(sig, buf, buflen)); 2244132451Sroberto 2245132451Sroberto address handler = (sa.sa_flags & SA_SIGINFO) 2246132451Sroberto ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2247132451Sroberto : CAST_FROM_FN_PTR(address, sa.sa_handler); 2248132451Sroberto 2249132451Sroberto if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2250132451Sroberto st->print("SIG_DFL"); 2251132451Sroberto } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2252132451Sroberto st->print("SIG_IGN"); 225382498Sroberto } else { 225482498Sroberto st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 225582498Sroberto } 225682498Sroberto 225754359Sroberto st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 225854359Sroberto 2259132451Sroberto address rh = VMError::get_resetted_sighandler(sig); 2260132451Sroberto // May be, handler was resetted by VMError? 2261132451Sroberto if(rh != NULL) { 226254359Sroberto handler = rh; 2263132451Sroberto sa.sa_flags = VMError::get_resetted_sigflags(sig); 226454359Sroberto } 2265132451Sroberto 2266132451Sroberto st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2267132451Sroberto 2268132451Sroberto // Check: is it our handler? 2269132451Sroberto if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2270132451Sroberto handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2271132451Sroberto // It is our signal handler 2272132451Sroberto // check for flags 2273132451Sroberto if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 227454359Sroberto st->print( 227554359Sroberto ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 227654359Sroberto os::Solaris::get_our_sigflags(sig)); 227754359Sroberto } 2278132451Sroberto } 2279132451Sroberto st->cr(); 2280132451Sroberto} 2281132451Sroberto 2282132451Srobertovoid os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2283132451Sroberto st->print_cr("Signal Handlers:"); 2284132451Sroberto print_signal_handler(st, SIGSEGV, buf, buflen); 2285132451Sroberto print_signal_handler(st, SIGBUS , buf, buflen); 2286132451Sroberto print_signal_handler(st, SIGFPE , buf, buflen); 2287132451Sroberto print_signal_handler(st, SIGPIPE, buf, buflen); 2288132451Sroberto print_signal_handler(st, SIGXFSZ, buf, buflen); 2289132451Sroberto print_signal_handler(st, SIGILL , buf, buflen); 2290132451Sroberto print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2291132451Sroberto print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2292132451Sroberto print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2293132451Sroberto print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2294132451Sroberto print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2295132451Sroberto print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2296132451Sroberto print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2297132451Sroberto print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 229882498Sroberto} 2299132451Sroberto 2300132451Srobertostatic char saved_jvm_path[MAXPATHLEN] = { 0 }; 2301132451Sroberto 2302132451Sroberto// Find the full path to the current module, libjvm.so or libjvm_g.so 2303132451Srobertovoid os::jvm_path(char *buf, jint buflen) { 2304132451Sroberto // Error checking. 230582498Sroberto if (buflen < MAXPATHLEN) { 230682498Sroberto assert(false, "must use a large-enough buffer"); 230754359Sroberto buf[0] = '\0'; 2308132451Sroberto return; 230954359Sroberto } 231054359Sroberto // Lazy resolve the path to current module. 231182498Sroberto if (saved_jvm_path[0] != 0) { 231254359Sroberto strcpy(buf, saved_jvm_path); 231354359Sroberto return; 2314132451Sroberto } 231582498Sroberto 2316132451Sroberto Dl_info dlinfo; 2317132451Sroberto int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2318182007Sroberto assert(ret != 0, "cannot locate libjvm"); 2319182007Sroberto realpath((char *)dlinfo.dli_fname, buf); 2320132451Sroberto 2321132451Sroberto if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2322182007Sroberto // Support for the gamma launcher. Typical value for buf is 2323182007Sroberto // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2324132451Sroberto // the right place in the string, then assume we are installed in a JDK and 2325132451Sroberto // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2326132451Sroberto // up the path so it looks like libjvm.so is installed there (append a 2327182007Sroberto // fake suffix hotspot/libjvm.so). 2328182007Sroberto const char *p = buf + strlen(buf) - 1; 2329132451Sroberto for (int count = 0; p > buf && count < 5; ++count) { 2330132451Sroberto for (--p; p > buf && *p != '/'; --p) 2331132451Sroberto /* empty */ ; 2332132451Sroberto } 233382498Sroberto 2334132451Sroberto if (strncmp(p, "/jre/lib/", 9) != 0) { 2335132451Sroberto // Look for JAVA_HOME in the environment. 2336132451Sroberto char* java_home_var = ::getenv("JAVA_HOME"); 2337132451Sroberto if (java_home_var != NULL && java_home_var[0] != 0) { 2338132451Sroberto char cpu_arch[12]; 2339132451Sroberto sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2340132451Sroberto#ifdef _LP64 2341132451Sroberto // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2342132451Sroberto if (strcmp(cpu_arch, "sparc") == 0) { 2343132451Sroberto strcat(cpu_arch, "v9"); 2344132451Sroberto } else if (strcmp(cpu_arch, "i386") == 0) { 2345132451Sroberto strcpy(cpu_arch, "amd64"); 2346132451Sroberto } 2347132451Sroberto#endif 2348132451Sroberto // Check the current module name "libjvm.so" or "libjvm_g.so". 2349132451Sroberto p = strrchr(buf, '/'); 2350132451Sroberto assert(strstr(p, "/libjvm") == p, "invalid library name"); 2351132451Sroberto p = strstr(p, "_g") ? "_g" : ""; 2352132451Sroberto 2353132451Sroberto realpath(java_home_var, buf); 2354132451Sroberto sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); 2355132451Sroberto if (0 == access(buf, F_OK)) { 235682498Sroberto // Use current module name "libjvm[_g].so" instead of 2357132451Sroberto // "libjvm"debug_only("_g")".so" since for fastdebug version 2358132451Sroberto // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2359132451Sroberto // It is used when we are choosing the HPI library's name 2360182007Sroberto // "libhpi[_g].so" in hpi::initialize_get_interface(). 2361182007Sroberto sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); 2362182007Sroberto } else { 2363132451Sroberto // Go back to path of .so 2364132451Sroberto realpath((char *)dlinfo.dli_fname, buf); 2365132451Sroberto } 2366132451Sroberto } 2367132451Sroberto } 2368132451Sroberto } 2369132451Sroberto 2370182007Sroberto strcpy(saved_jvm_path, buf); 2371132451Sroberto} 2372132451Sroberto 2373132451Sroberto 2374132451Srobertovoid os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2375132451Sroberto // no prefix required, not even "_" 2376132451Sroberto} 2377182007Sroberto 2378132451Sroberto 2379132451Srobertovoid os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2380132451Sroberto // no suffix required 2381132451Sroberto} 238282498Sroberto 238382498Sroberto 238482498Sroberto// sun.misc.Signal 238582498Sroberto 238682498Srobertoextern "C" { 238782498Sroberto static void UserHandler(int sig, void *siginfo, void *context) { 2388132451Sroberto // Ctrl-C is pressed during error reporting, likely because the error 2389132451Sroberto // handler fails to abort. Let VM die immediately. 2390132451Sroberto if (sig == SIGINT && is_error_reported()) { 239182498Sroberto os::die(); 239282498Sroberto } 2393132451Sroberto 2394132451Sroberto os::signal_notify(sig); 239582498Sroberto // We do not need to reinstate the signal handler each time... 239682498Sroberto } 239782498Sroberto} 239882498Sroberto 239982498Srobertovoid* os::user_handler() { 240082498Sroberto return CAST_FROM_FN_PTR(void*, UserHandler); 240182498Sroberto} 240282498Sroberto 240382498Srobertoextern "C" { 240482498Sroberto typedef void (*sa_handler_t)(int); 240582498Sroberto typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 240682498Sroberto} 240782498Sroberto 240882498Srobertovoid* os::signal(int signal_number, void* handler) { 240982498Sroberto struct sigaction sigAct, oldSigAct; 2410132451Sroberto sigfillset(&(sigAct.sa_mask)); 241182498Sroberto sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 241282498Sroberto sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2413132451Sroberto 241482498Sroberto if (sigaction(signal_number, &sigAct, &oldSigAct)) 241582498Sroberto // -1 means registration failed 241682498Sroberto return (void *)-1; 2417182007Sroberto 241882498Sroberto return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 241982498Sroberto} 242082498Sroberto 242182498Srobertovoid os::signal_raise(int signal_number) { 242282498Sroberto raise(signal_number); 242382498Sroberto} 2424182007Sroberto 242582498Sroberto/* 2426132451Sroberto * The following code is moved from os.cpp for making this 242782498Sroberto * code platform specific, which it is by its very nature. 242882498Sroberto */ 2429132451Sroberto 2430132451Sroberto// a counter for each possible signal value 2431132451Srobertostatic int Sigexit = 0; 2432132451Srobertostatic int Maxlibjsigsigs; 2433132451Srobertostatic jint *pending_signals = NULL; 2434132451Srobertostatic int *preinstalled_sigs = NULL; 2435132451Srobertostatic struct sigaction *chainedsigactions = NULL; 2436132451Srobertostatic sema_t sig_sem; 2437132451Srobertotypedef int (*version_getting_t)(); 2438132451Srobertoversion_getting_t os::Solaris::get_libjsig_version = NULL; 2439132451Srobertostatic int libjsigversion = NULL; 2440132451Sroberto 2441132451Srobertoint os::sigexitnum_pd() { 2442132451Sroberto assert(Sigexit > 0, "signal memory not yet initialized"); 244382498Sroberto return Sigexit; 244482498Sroberto} 244582498Sroberto 244682498Srobertovoid os::Solaris::init_signal_mem() { 2447132451Sroberto // Initialize signal structures 244882498Sroberto Maxsignum = SIGRTMAX; 2449132451Sroberto Sigexit = Maxsignum+1; 245082498Sroberto assert(Maxsignum >0, "Unable to obtain max signal number"); 245182498Sroberto 245282498Sroberto Maxlibjsigsigs = Maxsignum; 245382498Sroberto 2454132451Sroberto // pending_signals has one int per signal 2455132451Sroberto // The additional signal is for SIGEXIT - exit signal to signal_thread 2456132451Sroberto pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 245782498Sroberto memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 245882498Sroberto 245982498Sroberto if (UseSignalChaining) { 246082498Sroberto chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 246182498Sroberto * (Maxsignum + 1)); 2462132451Sroberto memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2463132451Sroberto preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2464132451Sroberto memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 246582498Sroberto } 246682498Sroberto ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2467132451Sroberto memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 246882498Sroberto} 246982498Sroberto 247082498Srobertovoid os::signal_init_pd() { 247182498Sroberto int ret; 247282498Sroberto 2473132451Sroberto ret = ::sema_init(&sig_sem, 0, NULL, NULL); 247454359Sroberto assert(ret == 0, "sema_init() failed"); 2475132451Sroberto} 2476132451Sroberto 247782498Srobertovoid os::signal_notify(int signal_number) { 2478132451Sroberto int ret; 2479132451Sroberto 2480132451Sroberto Atomic::inc(&pending_signals[signal_number]); 2481132451Sroberto ret = ::sema_post(&sig_sem); 2482132451Sroberto assert(ret == 0, "sema_post() failed"); 2483132451Sroberto} 2484132451Sroberto 2485132451Srobertostatic int check_pending_signals(bool wait_for_signal) { 2486132451Sroberto int ret; 2487132451Sroberto while (true) { 248882498Sroberto for (int i = 0; i < Sigexit + 1; i++) { 2489132451Sroberto jint n = pending_signals[i]; 2490132451Sroberto if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 249154359Sroberto return i; 2492132451Sroberto } 249354359Sroberto } 2494132451Sroberto if (!wait_for_signal) { 2495132451Sroberto return -1; 2496132451Sroberto } 249754359Sroberto JavaThread *thread = JavaThread::current(); 2498132451Sroberto ThreadBlockInVM tbivm(thread); 2499132451Sroberto 2500132451Sroberto bool threadIsSuspended; 2501132451Sroberto do { 2502132451Sroberto thread->set_suspend_equivalent(); 250382498Sroberto // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2504132451Sroberto while((ret = ::sema_wait(&sig_sem)) == EINTR) 2505132451Sroberto ; 250682498Sroberto assert(ret == 0, "sema_wait() failed"); 250782498Sroberto 2508132451Sroberto // were we externally suspended while we were waiting? 2509132451Sroberto threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2510132451Sroberto if (threadIsSuspended) { 2511132451Sroberto // 2512132451Sroberto // The semaphore has been incremented, but while we were waiting 2513132451Sroberto // another thread suspended us. We don't want to continue running 2514132451Sroberto // while suspended because that would surprise the thread that 2515132451Sroberto // suspended us. 2516132451Sroberto // 2517132451Sroberto ret = ::sema_post(&sig_sem); 2518132451Sroberto assert(ret == 0, "sema_post() failed"); 2519132451Sroberto 2520132451Sroberto thread->java_suspend_self(); 2521132451Sroberto } 2522132451Sroberto } while (threadIsSuspended); 2523132451Sroberto } 2524132451Sroberto} 2525132451Sroberto 2526132451Srobertoint os::signal_lookup() { 2527132451Sroberto return check_pending_signals(false); 2528132451Sroberto} 2529132451Sroberto 2530132451Srobertoint os::signal_wait() { 253182498Sroberto return check_pending_signals(true); 2532132451Sroberto} 253382498Sroberto 253482498Sroberto//////////////////////////////////////////////////////////////////////////////// 253582498Sroberto// Virtual Memory 2536132451Sroberto 2537132451Srobertostatic int page_size = -1; 2538132451Sroberto 2539132451Sroberto// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2540132451Sroberto// clear this var if support is not available. 2541132451Srobertostatic bool has_map_align = true; 2542132451Sroberto 2543132451Srobertoint os::vm_page_size() { 2544132451Sroberto assert(page_size != -1, "must call os::init"); 2545132451Sroberto return page_size; 2546132451Sroberto} 2547132451Sroberto 2548132451Sroberto// Solaris allocates memory by pages. 2549132451Srobertoint os::vm_allocation_granularity() { 255082498Sroberto assert(page_size != -1, "must call os::init"); 2551132451Sroberto return page_size; 2552132451Sroberto} 2553132451Sroberto 2554132451Srobertobool os::commit_memory(char* addr, size_t bytes) { 2555132451Sroberto size_t size = bytes; 2556132451Sroberto return 2557132451Sroberto NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, 2558132451Sroberto PROT_READ | PROT_WRITE | PROT_EXEC); 2559132451Sroberto} 256082498Sroberto 2561132451Srobertobool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { 256282498Sroberto if (commit_memory(addr, bytes)) { 2563132451Sroberto if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2564132451Sroberto // If the large page size has been set and the VM 2565132451Sroberto // is using large pages, use the large page size 2566132451Sroberto // if it is smaller than the alignment hint. This is 2567132451Sroberto // a case where the VM wants to use a larger alignment size 2568132451Sroberto // for its own reasons but still want to use large pages 2569132451Sroberto // (which is what matters to setting the mpss range. 2570132451Sroberto size_t page_size = 0; 2571132451Sroberto if (large_page_size() < alignment_hint) { 257282498Sroberto assert(UseLargePages, "Expected to be here for large page use only"); 2573132451Sroberto page_size = large_page_size(); 2574132451Sroberto } else { 2575132451Sroberto // If the alignment hint is less than the large page 2576132451Sroberto // size, the VM wants a particular alignment (thus the hint) 2577132451Sroberto // for internal reasons. Try to set the mpss range using 257882498Sroberto // the alignment_hint. 257982498Sroberto page_size = alignment_hint; 258082498Sroberto } 2581132451Sroberto // Since this is a hint, ignore any failures. 2582132451Sroberto (void)Solaris::set_mpss_range(addr, bytes, page_size); 2583132451Sroberto } 2584132451Sroberto return true; 2585132451Sroberto } 2586132451Sroberto return false; 2587132451Sroberto} 2588132451Sroberto 2589132451Sroberto// Uncommit the pages in a specified region. 2590132451Srobertovoid os::free_memory(char* addr, size_t bytes) { 259182498Sroberto if (madvise(addr, bytes, MADV_FREE) < 0) { 259282498Sroberto debug_only(warning("MADV_FREE failed.")); 259382498Sroberto return; 2594132451Sroberto } 2595132451Sroberto} 2596132451Sroberto 2597132451Sroberto// Change the page size in a given range. 2598132451Srobertovoid os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2599132451Sroberto assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2600132451Sroberto assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2601132451Sroberto Solaris::set_mpss_range(addr, bytes, alignment_hint); 2602132451Sroberto} 2603132451Sroberto 2604132451Sroberto// Tell the OS to make the range local to the first-touching LWP 260582498Srobertovoid os::numa_make_local(char *addr, size_t bytes) { 2606132451Sroberto assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2607132451Sroberto if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2608132451Sroberto debug_only(warning("MADV_ACCESS_LWP failed.")); 2609132451Sroberto } 2610132451Sroberto} 2611132451Sroberto 2612132451Sroberto// Tell the OS that this range would be accessed from different LWPs. 2613132451Srobertovoid os::numa_make_global(char *addr, size_t bytes) { 2614132451Sroberto assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2615132451Sroberto if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2616132451Sroberto debug_only(warning("MADV_ACCESS_MANY failed.")); 2617132451Sroberto } 2618132451Sroberto} 2619132451Sroberto 2620132451Sroberto// Get the number of the locality groups. 2621132451Srobertosize_t os::numa_get_groups_num() { 2622132451Sroberto size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2623132451Sroberto return n != -1 ? n : 1; 2624132451Sroberto} 2625132451Sroberto 262682498Sroberto// Get a list of leaf locality groups. A leaf lgroup is group that 262782498Sroberto// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2628132451Sroberto// board. An LWP is assigned to one of these groups upon creation. 262982498Srobertosize_t os::numa_get_leaf_groups(int *ids, size_t size) { 2630182007Sroberto if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2631182007Sroberto ids[0] = 0; 263282498Sroberto return 1; 2633132451Sroberto } 2634132451Sroberto int result_size = 0, top = 1, bottom = 0, cur = 0; 263582498Sroberto for (int k = 0; k < size; k++) { 2636182007Sroberto int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2637132451Sroberto (Solaris::lgrp_id_t*)&ids[top], size - top); 2638132451Sroberto if (r == -1) { 2639132451Sroberto ids[0] = 0; 2640132451Sroberto return 1; 2641132451Sroberto } 2642132451Sroberto if (!r) { 2643132451Sroberto assert (bottom <= cur, "Sanity check"); 2644132451Sroberto ids[bottom++] = ids[cur]; 2645132451Sroberto } 2646132451Sroberto top += r; 2647132451Sroberto cur++; 2648132451Sroberto } 2649132451Sroberto return bottom; 2650132451Sroberto} 2651132451Sroberto 2652132451Sroberto// Detect the topology change. Typically happens during CPU pluggin-unplugging. 2653132451Srobertobool os::numa_topology_changed() { 2654132451Sroberto int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2655132451Sroberto if (is_stale != -1 && is_stale) { 2656132451Sroberto Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2657132451Sroberto Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2658132451Sroberto assert(c != 0, "Failure to initialize LGRP API"); 2659132451Sroberto Solaris::set_lgrp_cookie(c); 2660132451Sroberto return true; 2661132451Sroberto } 2662132451Sroberto return false; 2663132451Sroberto} 2664132451Sroberto 2665132451Sroberto// Get the group id of the current LWP. 2666132451Srobertoint os::numa_get_group_id() { 2667132451Sroberto int lgrp_id = os::Solaris::lgrp_home(P_LWPID, P_MYID); 2668132451Sroberto if (lgrp_id == -1) { 2669132451Sroberto return 0; 2670132451Sroberto } 2671132451Sroberto return lgrp_id; 2672132451Sroberto} 2673132451Sroberto 2674132451Sroberto// Request information about the page. 2675132451Srobertobool os::get_page_info(char *start, page_info* info) { 267654359Sroberto const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2677132451Sroberto uint64_t addr = (uintptr_t)start; 2678132451Sroberto uint64_t outdata[2]; 2679132451Sroberto uint_t validity = 0; 268054359Sroberto 268154359Sroberto if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2682132451Sroberto return false; 268354359Sroberto } 2684132451Sroberto 2685132451Sroberto info->size = 0; 268682498Sroberto info->lgrp_id = -1; 2687132451Sroberto 2688132451Sroberto if ((validity & 1) != 0) { 2689132451Sroberto if ((validity & 2) != 0) { 2690132451Sroberto info->lgrp_id = outdata[0]; 2691132451Sroberto } 2692132451Sroberto if ((validity & 4) != 0) { 2693132451Sroberto info->size = outdata[1]; 269482498Sroberto } 2695132451Sroberto return true; 2696132451Sroberto } 2697132451Sroberto return false; 2698132451Sroberto} 2699132451Sroberto 2700132451Sroberto// Scan the pages from start to end until a page different than 2701132451Sroberto// the one described in the info parameter is encountered. 270282498Srobertochar *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2703132451Sroberto const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2704132451Sroberto const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2705132451Sroberto uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2706132451Sroberto uint_t validity[MAX_MEMINFO_CNT]; 2707132451Sroberto 2708132451Sroberto size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2709132451Sroberto uint64_t p = (uint64_t)start; 2710132451Sroberto while (p < (uint64_t)end) { 2711132451Sroberto addrs[0] = p; 2712132451Sroberto size_t addrs_count = 1; 2713132451Sroberto while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2714132451Sroberto addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2715132451Sroberto addrs_count++; 2716132451Sroberto } 2717132451Sroberto 2718132451Sroberto if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2719132451Sroberto return NULL; 2720132451Sroberto } 2721132451Sroberto 2722132451Sroberto size_t i = 0; 2723182007Sroberto for (; i < addrs_count; i++) { 2724182007Sroberto if ((validity[i] & 1) != 0) { 2725132451Sroberto if ((validity[i] & 4) != 0) { 2726132451Sroberto if (outdata[types * i + 1] != page_expected->size) { 2727132451Sroberto break; 2728132451Sroberto } 2729132451Sroberto } else 2730132451Sroberto if (page_expected->size != 0) { 2731132451Sroberto break; 273282498Sroberto } 273382498Sroberto 2734132451Sroberto if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2735132451Sroberto if (outdata[types * i] != page_expected->lgrp_id) { 2736132451Sroberto break; 2737132451Sroberto } 273854359Sroberto } 273954359Sroberto } else { 2740132451Sroberto return NULL; 2741132451Sroberto } 2742132451Sroberto } 2743132451Sroberto 2744132451Sroberto if (i != addrs_count) { 2745132451Sroberto if ((validity[i] & 2) != 0) { 2746132451Sroberto page_found->lgrp_id = outdata[types * i]; 274782498Sroberto } else { 2748132451Sroberto page_found->lgrp_id = -1; 274982498Sroberto } 2750132451Sroberto if ((validity[i] & 4) != 0) { 2751132451Sroberto page_found->size = outdata[types * i + 1]; 2752132451Sroberto } else { 275382498Sroberto page_found->size = 0; 275454359Sroberto } 2755132451Sroberto return (char*)addrs[i]; 2756132451Sroberto } 2757132451Sroberto 2758132451Sroberto p = addrs[addrs_count - 1] + page_size; 2759132451Sroberto } 2760132451Sroberto return end; 276182498Sroberto} 2762132451Sroberto 2763132451Srobertobool os::uncommit_memory(char* addr, size_t bytes) { 2764132451Sroberto size_t size = bytes; 2765132451Sroberto // Map uncommitted pages PROT_NONE so we fail early if we touch an 2766132451Sroberto // uncommitted page. Otherwise, the read/write might succeed if we 276782498Sroberto // have enough swap space to back the physical page. 2768132451Sroberto return 2769132451Sroberto NULL != Solaris::mmap_chunk(addr, size, 2770132451Sroberto MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2771132451Sroberto PROT_NONE); 2772132451Sroberto} 277382498Sroberto 2774132451Srobertochar* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2775132451Sroberto char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2776132451Sroberto 2777132451Sroberto if (b == MAP_FAILED) { 2778132451Sroberto return NULL; 2779132451Sroberto } 2780132451Sroberto return b; 2781132451Sroberto} 278282498Sroberto 278382498Srobertochar* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 2784132451Sroberto char* addr = requested_addr; 2785132451Sroberto int flags = MAP_PRIVATE | MAP_NORESERVE; 2786132451Sroberto 2787132451Sroberto assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 2788132451Sroberto 278954359Sroberto if (fixed) { 279054359Sroberto flags |= MAP_FIXED; 2791132451Sroberto } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2792132451Sroberto flags |= MAP_ALIGN; 2793132451Sroberto addr = (char*) alignment_hint; 2794132451Sroberto } 2795132451Sroberto 2796132451Sroberto // Map uncommitted pages PROT_NONE so we fail early if we touch an 2797132451Sroberto // uncommitted page. Otherwise, the read/write might succeed if we 2798132451Sroberto // have enough swap space to back the physical page. 2799132451Sroberto return mmap_chunk(addr, bytes, flags, PROT_NONE); 2800132451Sroberto} 2801132451Sroberto 2802132451Srobertochar* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 2803132451Sroberto char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 2804132451Sroberto 2805132451Sroberto guarantee(requested_addr == NULL || requested_addr == addr, 2806132451Sroberto "OS failed to return requested mmap address."); 2807132451Sroberto return addr; 2808132451Sroberto} 280954359Sroberto 281054359Sroberto// Reserve memory at an arbitrary address, only if that area is 2811132451Sroberto// available (and not reserved for something else). 2812132451Sroberto 2813132451Srobertochar* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2814132451Sroberto const int max_tries = 10; 2815132451Sroberto char* base[max_tries]; 281682498Sroberto size_t size[max_tries]; 281754359Sroberto 281854359Sroberto // Solaris adds a gap between mmap'ed regions. The size of the gap 2819132451Sroberto // is dependent on the requested size and the MMU. Our initial gap 282054359Sroberto // value here is just a guess and will be corrected later. 2821132451Sroberto bool had_top_overlap = false; 2822132451Sroberto bool have_adjusted_gap = false; 2823132451Sroberto size_t gap = 0x400000; 2824132451Sroberto 2825132451Sroberto // Assert only that the size is a multiple of the page size, since 2826132451Sroberto // that's all that mmap requires, and since that's all we really know 2827132451Sroberto // about at this low abstraction level. If we need higher alignment, 2828132451Sroberto // we can either pass an alignment to this method or verify alignment 2829132451Sroberto // in one of the methods further up the call chain. See bug 5044738. 2830132451Sroberto assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 283154359Sroberto 283254359Sroberto // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2833132451Sroberto // Give it a try, if the kernel honors the hint we can return immediately. 2834132451Sroberto char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2835132451Sroberto volatile int err = errno; 283654359Sroberto if (addr == requested_addr) { 2837132451Sroberto return addr; 2838132451Sroberto } else if (addr != NULL) { 2839132451Sroberto unmap_memory(addr, bytes); 284054359Sroberto } 2841132451Sroberto 2842132451Sroberto if (PrintMiscellaneous && Verbose) { 2843132451Sroberto char buf[256]; 2844132451Sroberto buf[0] = '\0'; 2845132451Sroberto if (addr == NULL) { 2846132451Sroberto jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 284756746Sroberto } 284856746Sroberto warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " 2849132451Sroberto PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2850132451Sroberto "%s", bytes, requested_addr, addr, buf); 2851132451Sroberto } 285254359Sroberto 2853132451Sroberto // Address hint method didn't work. Fall back to the old method. 2854132451Sroberto // In theory, once SNV becomes our oldest supported platform, this 285582498Sroberto // code will no longer be needed. 285682498Sroberto // 285782498Sroberto // Repeatedly allocate blocks until the block is allocated at the 2858132451Sroberto // right spot. Give up after max_tries. 285982498Sroberto int i; 2860132451Sroberto for (i = 0; i < max_tries; ++i) { 2861132451Sroberto base[i] = reserve_memory(bytes); 2862132451Sroberto 2863132451Sroberto if (base[i] != NULL) { 2864132451Sroberto // Is this the block we wanted? 2865132451Sroberto if (base[i] == requested_addr) { 2866132451Sroberto size[i] = bytes; 2867132451Sroberto break; 2868132451Sroberto } 286982498Sroberto 2870132451Sroberto // check that the gap value is right 2871132451Sroberto if (had_top_overlap && !have_adjusted_gap) { 2872132451Sroberto size_t actual_gap = base[i-1] - base[i] - bytes; 2873132451Sroberto if (gap != actual_gap) { 2874132451Sroberto // adjust the gap value and retry the last 2 allocations 2875132451Sroberto assert(i > 0, "gap adjustment code problem"); 2876132451Sroberto have_adjusted_gap = true; // adjust the gap only once, just in case 2877132451Sroberto gap = actual_gap; 2878132451Sroberto if (PrintMiscellaneous && Verbose) { 2879132451Sroberto warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2880132451Sroberto } 2881132451Sroberto unmap_memory(base[i], bytes); 2882132451Sroberto unmap_memory(base[i-1], size[i-1]); 2883182007Sroberto i-=2; 2884132451Sroberto continue; 288554359Sroberto } 288654359Sroberto } 288754359Sroberto 288854359Sroberto // Does this overlap the block we wanted? Give back the overlapped 2889132451Sroberto // parts and try again. 2890132451Sroberto // 289182498Sroberto // There is still a bug in this code: if top_overlap == bytes, 289282498Sroberto // the overlap is offset from requested region by the value of gap. 2893132451Sroberto // In this case giving back the overlapped part will not work, 289482498Sroberto // because we'll give back the entire block at base[i] and 2895132451Sroberto // therefore the subsequent allocation will not generate a new gap. 2896132451Sroberto // This could be fixed with a new algorithm that used larger 289782498Sroberto // or variable size chunks to find the requested region - 289882498Sroberto // but such a change would introduce additional complications. 2899132451Sroberto // It's rare enough that the planets align for this bug, 2900132451Sroberto // so we'll just wait for a fix for 6204603/5003415 which 290154359Sroberto // will provide a mmap flag to allow us to avoid this business. 2902132451Sroberto 290354359Sroberto size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2904132451Sroberto if (top_overlap >= 0 && top_overlap < bytes) { 290554359Sroberto had_top_overlap = true; 2906132451Sroberto unmap_memory(base[i], top_overlap); 290754359Sroberto base[i] += top_overlap; 2908132451Sroberto size[i] = bytes - top_overlap; 2909132451Sroberto } else { 2910132451Sroberto size_t bottom_overlap = base[i] + bytes - requested_addr; 2911132451Sroberto if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2912132451Sroberto if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2913132451Sroberto warning("attempt_reserve_memory_at: possible alignment bug"); 2914132451Sroberto } 2915132451Sroberto unmap_memory(requested_addr, bottom_overlap); 2916132451Sroberto size[i] = bytes - bottom_overlap; 2917132451Sroberto } else { 2918132451Sroberto size[i] = bytes; 2919182007Sroberto } 2920132451Sroberto } 2921132451Sroberto } 292254359Sroberto } 292354359Sroberto 2924132451Sroberto // Give back the unused reserved pieces. 292554359Sroberto 2926182007Sroberto for (int j = 0; j < i; ++j) { 2927182007Sroberto if (base[j] != NULL) { 292854359Sroberto unmap_memory(base[j], size[j]); 2929132451Sroberto } 2930132451Sroberto } 2931132451Sroberto 2932132451Sroberto return (i < max_tries) ? requested_addr : NULL; 2933182007Sroberto} 2934182007Sroberto 2935132451Srobertobool os::release_memory(char* addr, size_t bytes) { 2936182007Sroberto size_t size = bytes; 2937182007Sroberto return munmap(addr, size) == 0; 2938132451Sroberto} 293954359Sroberto 2940132451Srobertostatic bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2941132451Sroberto assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2942132451Sroberto "addr must be page aligned"); 294354359Sroberto int retVal = mprotect(addr, bytes, prot); 294454359Sroberto return retVal == 0; 294554359Sroberto} 2946132451Sroberto 294754359Sroberto// Protect memory (make it read-only. (Used to pass readonly pages through 2948132451Sroberto// JNI GetArray<type>Elements with empty arrays.) 2949132451Srobertobool os::protect_memory(char* addr, size_t bytes) { 2950132451Sroberto return solaris_mprotect(addr, bytes, PROT_READ); 2951132451Sroberto} 2952132451Sroberto 2953132451Sroberto// guard_memory and unguard_memory only happens within stack guard pages. 2954132451Sroberto// Since ISM pertains only to the heap, guard and unguard memory should not 2955132451Sroberto/// happen with an ISM region. 2956132451Srobertobool os::guard_memory(char* addr, size_t bytes) { 2957132451Sroberto return solaris_mprotect(addr, bytes, PROT_NONE); 2958132451Sroberto} 2959132451Sroberto 2960132451Srobertobool os::unguard_memory(char* addr, size_t bytes) { 296154359Sroberto return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC); 2962132451Sroberto} 296354359Sroberto 2964132451Sroberto// Large page support 296554359Sroberto 296654359Sroberto// UseLargePages is the master flag to enable/disable large page memory. 2967132451Sroberto// UseMPSS and UseISM are supported for compatibility reasons. Their combined 2968132451Sroberto// effects can be described in the following table: 2969132451Sroberto// 2970132451Sroberto// UseLargePages UseMPSS UseISM 2971132451Sroberto// false * * => UseLargePages is the master switch, turning 2972132451Sroberto// it off will turn off both UseMPSS and 2973132451Sroberto// UseISM. VM will not use large page memory 2974132451Sroberto// regardless the settings of UseMPSS/UseISM. 297554359Sroberto// true false false => Unless future Solaris provides other 297654359Sroberto// mechanism to use large page memory, this 2977132451Sroberto// combination is equivalent to -UseLargePages, 2978132451Sroberto// VM will not use large page memory 2979132451Sroberto// true true false => JVM will use MPSS for large page memory. 2980132451Sroberto// This is the default behavior. 2981132451Sroberto// true false true => JVM will use ISM for large page memory. 2982132451Sroberto// true true true => JVM will use ISM if it is available. 298356746Sroberto// Otherwise, JVM will fall back to MPSS. 298454359Sroberto// Becaues ISM is now available on all 2985132451Sroberto// supported Solaris versions, this combination 2986132451Sroberto// is equivalent to +UseISM -UseMPSS. 2987132451Sroberto 298854359Srobertotypedef int (*getpagesizes_func_type) (size_t[], int); 298954359Srobertostatic size_t _large_page_size = 0; 299054359Sroberto 2991132451Srobertobool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 2992132451Sroberto // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 2993132451Sroberto // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 2994132451Sroberto // can support multiple page sizes. 2995132451Sroberto 2996132451Sroberto // Don't bother to probe page size because getpagesizes() comes with MPSS. 299782498Sroberto // ISM is only recommended on old Solaris where there is no MPSS support. 2998132451Sroberto // Simply choose a conservative value as default. 2999132451Sroberto *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3000132451Sroberto SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); 3001132451Sroberto 3002132451Sroberto // ISM is available on all supported Solaris versions 300382498Sroberto return true; 3004132451Sroberto} 300582498Sroberto 300682498Sroberto// Insertion sort for small arrays (descending order). 3007132451Srobertostatic void insertion_sort_descending(size_t* array, int len) { 3008132451Sroberto for (int i = 0; i < len; i++) { 3009132451Sroberto size_t val = array[i]; 301054359Sroberto for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3011132451Sroberto size_t tmp = array[key]; 3012132451Sroberto array[key] = array[key - 1]; 3013132451Sroberto array[key - 1] = tmp; 3014132451Sroberto } 3015132451Sroberto } 301682498Sroberto} 301782498Sroberto 301882498Srobertobool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3019132451Sroberto getpagesizes_func_type getpagesizes_func = 302054359Sroberto CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3021132451Sroberto if (getpagesizes_func == NULL) { 3022132451Sroberto if (warn) { 3023132451Sroberto warning("MPSS is not supported by the operating system."); 3024132451Sroberto } 3025132451Sroberto return false; 3026132451Sroberto } 3027132451Sroberto 3028132451Sroberto const unsigned int usable_count = VM_Version::page_size_count(); 3029132451Sroberto if (usable_count == 1) { 3030132451Sroberto return false; 3031132451Sroberto } 3032132451Sroberto 3033182007Sroberto // Fill the array of page sizes. 3034132451Sroberto int n = getpagesizes_func(_page_sizes, page_sizes_max); 3035132451Sroberto assert(n > 0, "Solaris bug?"); 3036132451Sroberto if (n == page_sizes_max) { 3037132451Sroberto // Add a sentinel value (necessary only if the array was completely filled 3038132451Sroberto // since it is static (zeroed at initialization)). 3039132451Sroberto _page_sizes[--n] = 0; 3040182007Sroberto DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3041182007Sroberto } 3042182007Sroberto assert(_page_sizes[n] == 0, "missing sentinel"); 3043182007Sroberto 3044182007Sroberto if (n == 1) return false; // Only one page size available. 3045182007Sroberto 3046132451Sroberto // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3047182007Sroberto // select up to usable_count elements. First sort the array, find the first 3048182007Sroberto // acceptable value, then copy the usable sizes to the top of the array and 3049182007Sroberto // trim the rest. Make sure to include the default page size :-). 3050182007Sroberto // 3051132451Sroberto // A better policy could get rid of the 4M limit by taking the sizes of the 3052182007Sroberto // important VM memory regions (java heap and possibly the code cache) into 3053132451Sroberto // account. 3054132451Sroberto insertion_sort_descending(_page_sizes, n); 3055182007Sroberto const size_t size_limit = 3056182007Sroberto FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 305754359Sroberto int beg; 3058132451Sroberto for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3059132451Sroberto const int end = MIN2((int)usable_count, n) - 1; 306054359Sroberto for (int cur = 0; cur < end; ++cur, ++beg) { 306154359Sroberto _page_sizes[cur] = _page_sizes[beg]; 306254359Sroberto } 3063132451Sroberto _page_sizes[end] = vm_page_size(); 306454359Sroberto _page_sizes[end + 1] = 0; 3065132451Sroberto 3066132451Sroberto if (_page_sizes[end] > _page_sizes[end - 1]) { 3067132451Sroberto // Default page size is not the smallest; sort again. 3068132451Sroberto insertion_sort_descending(_page_sizes, end + 1); 3069132451Sroberto } 3070132451Sroberto *page_size = _page_sizes[0]; 307182498Sroberto 3072132451Sroberto return true; 3073132451Sroberto} 3074132451Sroberto 3075132451Srobertobool os::large_page_init() { 3076132451Sroberto if (!UseLargePages) { 307754359Sroberto UseISM = false; 3078132451Sroberto UseMPSS = false; 3079132451Sroberto return false; 3080132451Sroberto } 3081132451Sroberto 3082132451Sroberto // print a warning if any large page related flag is specified on command line 3083132451Sroberto bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3084132451Sroberto !FLAG_IS_DEFAULT(UseISM) || 3085132451Sroberto !FLAG_IS_DEFAULT(UseMPSS) || 3086132451Sroberto !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3087132451Sroberto UseISM = UseISM && 3088132451Sroberto Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3089132451Sroberto if (UseISM) { 3090132451Sroberto // ISM disables MPSS to be compatible with old JDK behavior 3091132451Sroberto UseMPSS = false; 3092132451Sroberto _page_sizes[0] = _large_page_size; 3093132451Sroberto _page_sizes[1] = vm_page_size(); 3094132451Sroberto } 3095132451Sroberto 3096132451Sroberto UseMPSS = UseMPSS && 3097132451Sroberto Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3098132451Sroberto 3099132451Sroberto UseLargePages = UseISM || UseMPSS; 3100132451Sroberto return UseLargePages; 3101132451Sroberto} 3102132451Sroberto 3103132451Srobertobool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3104132451Sroberto // Signal to OS that we want large pages for addresses 3105132451Sroberto // from addr, addr + bytes 3106132451Sroberto struct memcntl_mha mpss_struct; 3107132451Sroberto mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3108132451Sroberto mpss_struct.mha_pagesize = align; 3109132451Sroberto mpss_struct.mha_flags = 0; 3110132451Sroberto if (memcntl(start, bytes, MC_HAT_ADVISE, 3111132451Sroberto (caddr_t) &mpss_struct, 0, 0) < 0) { 3112132451Sroberto debug_only(warning("Attempt to use MPSS failed.")); 3113132451Sroberto return false; 3114132451Sroberto } 3115132451Sroberto return true; 3116132451Sroberto} 3117132451Sroberto 3118132451Srobertochar* os::reserve_memory_special(size_t bytes) { 3119132451Sroberto assert(UseLargePages && UseISM, "only for ISM large pages"); 3120132451Sroberto 3121132451Sroberto size_t size = bytes; 3122132451Sroberto char* retAddr = NULL; 3123132451Sroberto int shmid; 312454359Sroberto key_t ismKey; 312554359Sroberto 312654359Sroberto bool warn_on_failure = UseISM && 3127132451Sroberto (!FLAG_IS_DEFAULT(UseLargePages) || 3128132451Sroberto !FLAG_IS_DEFAULT(UseISM) || 3129132451Sroberto !FLAG_IS_DEFAULT(LargePageSizeInBytes) 313054359Sroberto ); 3131132451Sroberto char msg[128]; 3132132451Sroberto 3133132451Sroberto ismKey = IPC_PRIVATE; 3134132451Sroberto 3135132451Sroberto // Create a large shared memory region to attach to based on size. 3136132451Sroberto // Currently, size is the total size of the heap 3137132451Sroberto shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3138132451Sroberto if (shmid == -1){ 3139132451Sroberto if (warn_on_failure) { 314054359Sroberto jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 314154359Sroberto warning(msg); 314254359Sroberto } 314354359Sroberto return NULL; 314454359Sroberto } 3145132451Sroberto 3146132451Sroberto // Attach to the region 3147132451Sroberto retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 314854359Sroberto int err = errno; 314982498Sroberto 3150132451Sroberto // Remove shmid. If shmat() is successful, the actual shared memory segment 3151132451Sroberto // will be deleted when it's detached by shmdt() or when the process 315254359Sroberto // terminates. If shmat() is not successful this will remove the shared 3153132451Sroberto // segment immediately. 315454359Sroberto shmctl(shmid, IPC_RMID, NULL); 315554359Sroberto 3156132451Sroberto if (retAddr == (char *) -1) { 315754359Sroberto if (warn_on_failure) { 3158132451Sroberto jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3159132451Sroberto warning(msg); 3160132451Sroberto } 316154359Sroberto return NULL; 3162132451Sroberto } 3163132451Sroberto 316454359Sroberto return retAddr; 316554359Sroberto} 316654359Sroberto 316754359Srobertobool os::release_memory_special(char* base, size_t bytes) { 3168132451Sroberto // detaching the SHM segment will also delete it, see reserve_memory_special() 3169132451Sroberto int rslt = shmdt(base); 317054359Sroberto return rslt == 0; 317154359Sroberto} 3172132451Sroberto 3173132451Srobertosize_t os::large_page_size() { 317454359Sroberto return _large_page_size; 3175132451Sroberto} 3176132451Sroberto 3177132451Sroberto// MPSS allows application to commit large page memory on demand; with ISM 3178132451Sroberto// the entire memory region must be allocated as shared memory. 3179132451Srobertobool os::can_commit_large_page_memory() { 3180132451Sroberto return UseISM ? false : true; 3181132451Sroberto} 3182132451Sroberto 3183132451Srobertobool os::can_execute_large_page_memory() { 3184132451Sroberto return UseISM ? false : true; 318554359Sroberto} 3186132451Sroberto 3187132451Srobertostatic int os_sleep(jlong millis, bool interruptible) { 3188132451Sroberto const jlong limit = INT_MAX; 3189132451Sroberto jlong prevtime; 3190132451Sroberto int res; 3191132451Sroberto 3192132451Sroberto while (millis > limit) { 3193132451Sroberto if ((res = os_sleep(limit, interruptible)) != OS_OK) 3194132451Sroberto return res; 319554359Sroberto millis -= limit; 319654359Sroberto } 319754359Sroberto 3198132451Sroberto // Restart interrupted polls with new parameters until the proper delay 3199132451Sroberto // has been completed. 3200132451Sroberto 3201132451Sroberto prevtime = getTimeMillis(); 3202132451Sroberto 320382498Sroberto while (millis > 0) { 3204132451Sroberto jlong newtime; 3205132451Sroberto 320682498Sroberto if (!interruptible) { 320782498Sroberto // Following assert fails for os::yield_all: 3208132451Sroberto // assert(!thread->is_Java_thread(), "must not be java thread"); 3209132451Sroberto res = poll(NULL, 0, millis); 3210132451Sroberto } else { 3211132451Sroberto JavaThread *jt = JavaThread::current(); 321254359Sroberto 3213132451Sroberto INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3214132451Sroberto os::Solaris::clear_interrupted); 321582498Sroberto } 321682498Sroberto 3217132451Sroberto // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3218182007Sroberto // thread.Interrupt. 3219132451Sroberto 3220132451Sroberto if((res == OS_ERR) && (errno == EINTR)) { 3221132451Sroberto newtime = getTimeMillis(); 3222132451Sroberto assert(newtime >= prevtime, "time moving backwards"); 3223132451Sroberto /* Doing prevtime and newtime in microseconds doesn't help precision, 322482498Sroberto and trying to round up to avoid lost milliseconds can result in a 3225132451Sroberto too-short delay. */ 3226132451Sroberto millis -= newtime - prevtime; 3227132451Sroberto if(millis <= 0) 3228132451Sroberto return OS_OK; 3229132451Sroberto prevtime = newtime; 3230132451Sroberto } else 3231132451Sroberto return res; 3232132451Sroberto } 323382498Sroberto 3234132451Sroberto return OS_OK; 3235132451Sroberto} 3236132451Sroberto 3237132451Sroberto// Read calls from inside the vm need to perform state transitions 3238132451Srobertosize_t os::read(int fd, void *buf, unsigned int nBytes) { 3239132451Sroberto INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3240132451Sroberto} 3241132451Sroberto 3242132451Srobertoint os::sleep(Thread* thread, jlong millis, bool interruptible) { 3243132451Sroberto assert(thread == Thread::current(), "thread consistency check"); 3244132451Sroberto 3245132451Sroberto // TODO-FIXME: this should be removed. 324682498Sroberto // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3247132451Sroberto // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3248132451Sroberto // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 324982498Sroberto // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3250132451Sroberto // is fooled into believing that the system is making progress. In the code below we block the 325182498Sroberto // the watcher thread while safepoint is in progress so that it would not appear as though the 3252132451Sroberto // system is making progress. 3253132451Sroberto if (!Solaris::T2_libthread() && 3254132451Sroberto thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3255182007Sroberto // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3256182007Sroberto // the entire safepoint, the watcher thread will line up here during the safepoint. 3257182007Sroberto Threads_lock->lock_without_safepoint_check(); 3258132451Sroberto Threads_lock->unlock(); 325982498Sroberto } 3260132451Sroberto 3261132451Sroberto if (thread->is_Java_thread()) { 3262132451Sroberto // This is a JavaThread so we honor the _thread_blocked protocol 3263132451Sroberto // even for sleeps of 0 milliseconds. This was originally done 3264182007Sroberto // as a workaround for bug 4338139. However, now we also do it 3265132451Sroberto // to honor the suspend-equivalent protocol. 3266132451Sroberto 3267182007Sroberto JavaThread *jt = (JavaThread *) thread; 3268132451Sroberto ThreadBlockInVM tbivm(jt); 3269132451Sroberto 3270182007Sroberto jt->set_suspend_equivalent(); 3271132451Sroberto // cleared by handle_special_suspend_equivalent_condition() or 3272132451Sroberto // java_suspend_self() via check_and_wait_while_suspended() 3273132451Sroberto 3274132451Sroberto int ret_code; 3275132451Sroberto if (millis <= 0) { 327682498Sroberto thr_yield(); 327782498Sroberto ret_code = 0; 327882498Sroberto } else { 3279132451Sroberto // The original sleep() implementation did not create an 3280132451Sroberto // OSThreadWaitState helper for sleeps of 0 milliseconds. 3281132451Sroberto // I'm preserving that decision for now. 3282132451Sroberto OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3283132451Sroberto 3284132451Sroberto ret_code = os_sleep(millis, interruptible); 3285132451Sroberto } 3286132451Sroberto 3287132451Sroberto // were we externally suspended while we were waiting? 3288132451Sroberto jt->check_and_wait_while_suspended(); 3289132451Sroberto 3290132451Sroberto return ret_code; 3291132451Sroberto } 3292132451Sroberto 3293132451Sroberto // non-JavaThread from this point on: 3294132451Sroberto 3295182007Sroberto if (millis <= 0) { 3296132451Sroberto thr_yield(); 3297132451Sroberto return 0; 3298132451Sroberto } 3299132451Sroberto 3300132451Sroberto OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3301132451Sroberto 3302132451Sroberto return os_sleep(millis, interruptible); 3303132451Sroberto} 3304132451Sroberto 3305132451Srobertoint os::naked_sleep() { 3306132451Sroberto // %% make the sleep time an integer flag. for now use 1 millisec. 3307132451Sroberto return os_sleep(1, false); 3308132451Sroberto} 3309132451Sroberto 3310132451Sroberto// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3311132451Srobertovoid os::infinite_sleep() { 3312182007Sroberto while (true) { // sleep forever ... 3313132451Sroberto ::sleep(100); // ... 100 seconds at a time 3314132451Sroberto } 3315132451Sroberto} 3316132451Sroberto 3317132451Sroberto// Used to convert frequent JVM_Yield() to nops 3318132451Srobertobool os::dont_yield() { 3319132451Sroberto if (DontYieldALot) { 3320132451Sroberto static hrtime_t last_time = 0; 3321132451Sroberto hrtime_t diff = getTimeNanos() - last_time; 3322132451Sroberto 3323132451Sroberto if (diff < DontYieldALotInterval * 1000000) 3324132451Sroberto return true; 3325132451Sroberto 332682498Sroberto last_time += diff; 332782498Sroberto 332882498Sroberto return false; 332982498Sroberto } 3330132451Sroberto else { 333182498Sroberto return false; 333254359Sroberto } 3333132451Sroberto} 333454359Sroberto 3335132451Sroberto// Caveat: Solaris os::yield() causes a thread-state transition whereas 333654359Sroberto// the linux and win32 implementations do not. This should be checked. 333754359Sroberto 3338132451Srobertovoid os::yield() { 3339132451Sroberto // Yields to all threads with same or greater priority 3340132451Sroberto os::sleep(Thread::current(), 0, false); 334154359Sroberto} 3342132451Sroberto 3343132451Sroberto// Note that yield semantics are defined by the scheduling class to which 3344132451Sroberto// the thread currently belongs. Typically, yield will _not yield to 3345132451Sroberto// other equal or higher priority threads that reside on the dispatch queues 3346132451Sroberto// of other CPUs. 334754359Sroberto 3348132451Srobertoos::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3349132451Sroberto 3350132451Sroberto 3351132451Sroberto// On Solaris we found that yield_all doesn't always yield to all other threads. 335254359Sroberto// There have been cases where there is a thread ready to execute but it doesn't 3353132451Sroberto// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3354132451Sroberto// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3355132451Sroberto// SIGWAITING signal which will cause a new lwp to be created. So we count the 3356132451Sroberto// number of times yield_all is called in the one loop and increase the sleep 3357132451Sroberto// time after 8 attempts. If this fails too we increase the concurrency level 3358132451Sroberto// so that the starving thread would get an lwp 3359132451Sroberto 3360132451Srobertovoid os::yield_all(int attempts) { 3361132451Sroberto // Yields to all threads, including threads with lower priorities 3362132451Sroberto if (attempts == 0) { 3363132451Sroberto os::sleep(Thread::current(), 1, false); 3364132451Sroberto } else { 3365132451Sroberto int iterations = attempts % 30; 3366132451Sroberto if (iterations == 0 && !os::Solaris::T2_libthread()) { 3367132451Sroberto // thr_setconcurrency and _getconcurrency make sense only under T1. 3368132451Sroberto int noofLWPS = thr_getconcurrency(); 3369132451Sroberto if (noofLWPS < (Threads::number_of_threads() + 2)) { 3370132451Sroberto thr_setconcurrency(thr_getconcurrency() + 1); 3371132451Sroberto } 3372132451Sroberto } else if (iterations < 25) { 337382498Sroberto os::sleep(Thread::current(), 1, false); 3374132451Sroberto } else { 337554359Sroberto os::sleep(Thread::current(), 10, false); 337654359Sroberto } 337782498Sroberto } 3378132451Sroberto} 337982498Sroberto 338082498Sroberto// Called from the tight loops to possibly influence time-sharing heuristics 338182498Srobertovoid os::loop_breaker(int attempts) { 338282498Sroberto os::yield_all(attempts); 338382498Sroberto} 338482498Sroberto 338582498Sroberto 338654359Sroberto// Interface for setting lwp priorities. If we are using T2 libthread, 338754359Sroberto// which forces the use of BoundThreads or we manually set UseBoundThreads, 338854359Sroberto// all of our threads will be assigned to real lwp's. Using the thr_setprio 338954359Sroberto// function is meaningless in this mode so we must adjust the real lwp's priority 339054359Sroberto// The routines below implement the getting and setting of lwp priorities. 339154359Sroberto// 339254359Sroberto// Note: There are three priority scales used on Solaris. Java priotities 339354359Sroberto// which range from 1 to 10, libthread "thr_setprio" scale which range 339454359Sroberto// from 0 to 127, and the current scheduling class of the process we 339554359Sroberto// are running in. This is typically from -60 to +60. 339654359Sroberto// The setting of the lwp priorities in done after a call to thr_setprio 339754359Sroberto// so Java priorities are mapped to libthread priorities and we map from 339854359Sroberto// the latter to lwp priorities. We don't keep priorities stored in 339954359Sroberto// Java priorities since some of our worker threads want to set priorities 340054359Sroberto// higher than all Java threads. 340154359Sroberto// 340254359Sroberto// For related information: 340354359Sroberto// (1) man -s 2 priocntl 340454359Sroberto// (2) man -s 4 priocntl 340554359Sroberto// (3) man dispadmin 340654359Sroberto// = librt.so 340782498Sroberto// = libthread/common/rtsched.c - thrp_setlwpprio(). 340854359Sroberto// = ps -cL <pid> ... to validate priority. 340954359Sroberto// = sched_get_priority_min and _max 341054359Sroberto// pthread_create 341154359Sroberto// sched_setparam 341254359Sroberto// pthread_setschedparam 341354359Sroberto// 341454359Sroberto// Assumptions: 341554359Sroberto// + We assume that all threads in the process belong to the same 3416132451Sroberto// scheduling class. IE. an homogenous process. 3417132451Sroberto// + Must be root or in IA group to change change "interactive" attribute. 341854359Sroberto// Priocntl() will fail silently. The only indication of failure is when 341954359Sroberto// we read-back the value and notice that it hasn't changed. 342054359Sroberto// + Interactive threads enter the runq at the head, non-interactive at the tail. 342154359Sroberto// + For RT, change timeslice as well. Invariant: 342254359Sroberto// constant "priority integral" 342354359Sroberto// Konst == TimeSlice * (60-Priority) 342454359Sroberto// Given a priority, compute appropriate timeslice. 342554359Sroberto// + Higher numerical values have higher priority. 3426132451Sroberto 3427132451Sroberto// sched class attributes 342854359Srobertotypedef struct { 342956746Sroberto int schedPolicy; // classID 343054359Sroberto int maxPrio; 343154359Sroberto int minPrio; 343254359Sroberto} SchedInfo; 343356746Sroberto 3434132451Sroberto 343556746Srobertostatic SchedInfo tsLimits, iaLimits, rtLimits; 343682498Sroberto 343756746Sroberto#ifdef ASSERT 3438132451Srobertostatic int ReadBackValidate = 1; 3439132451Sroberto#endif 3440132451Srobertostatic int myClass = 0; 344182498Srobertostatic int myMin = 0; 344256746Srobertostatic int myMax = 0; 344356746Srobertostatic int myCur = 0; 3444132451Srobertostatic bool priocntl_enable = false; 344556746Sroberto 3446182007Sroberto 3447132451Sroberto// Call the version of priocntl suitable for all supported versions 3448132451Sroberto// of Solaris. We need to call through this wrapper so that we can 3449182007Sroberto// build on Solaris 9 and run on Solaris 8, 9 and 10. 3450132451Sroberto// 3451132451Sroberto// This code should be removed if we ever stop supporting Solaris 8 3452132451Sroberto// and earlier releases. 3453132451Sroberto 3454132451Srobertostatic long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3455132451Srobertotypedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3456132451Srobertostatic priocntl_type priocntl_ptr = priocntl_stub; 345756746Sroberto 345856746Sroberto// Stub to set the value of the real pointer, and then call the real 345956746Sroberto// function. 3460132451Sroberto 3461132451Srobertostatic long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3462132451Sroberto // Try Solaris 8- name only. 3463132451Sroberto priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3464132451Sroberto guarantee(tmp != NULL, "priocntl function not found."); 3465132451Sroberto priocntl_ptr = tmp; 3466182007Sroberto return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3467132451Sroberto} 3468132451Sroberto 3469132451Sroberto 3470132451Sroberto// lwp_priocntl_init 3471132451Sroberto// 3472132451Sroberto// Try to determine the priority scale for our process. 3473132451Sroberto// 3474132451Sroberto// Return errno or 0 if OK. 3475132451Sroberto// 3476132451Srobertostatic 3477132451Srobertoint lwp_priocntl_init () 3478132451Sroberto{ 3479132451Sroberto int rslt; 3480132451Sroberto pcinfo_t ClassInfo; 3481132451Sroberto pcparms_t ParmInfo; 3482132451Sroberto int i; 3483132451Sroberto 3484132451Sroberto if (!UseThreadPriorities) return 0; 3485132451Sroberto 3486132451Sroberto // We are using Bound threads, we need to determine our priority ranges 3487132451Sroberto if (os::Solaris::T2_libthread() || UseBoundThreads) { 3488132451Sroberto // If ThreadPriorityPolicy is 1, switch tables 3489132451Sroberto if (ThreadPriorityPolicy == 1) { 3490132451Sroberto for (i = 0 ; i < MaxPriority+1; i++) 3491132451Sroberto os::java_to_os_priority[i] = prio_policy1[i]; 3492132451Sroberto } 3493132451Sroberto } 3494132451Sroberto // Not using Bound Threads, set to ThreadPolicy 1 3495132451Sroberto else { 3496132451Sroberto for ( i = 0 ; i < MaxPriority+1; i++ ) { 3497132451Sroberto os::java_to_os_priority[i] = prio_policy1[i]; 3498132451Sroberto } 3499132451Sroberto return 0; 3500132451Sroberto } 3501132451Sroberto 3502132451Sroberto 3503132451Sroberto // Get IDs for a set of well-known scheduling classes. 3504132451Sroberto // TODO-FIXME: GETCLINFO returns the current # of classes in the 3505132451Sroberto // the system. We should have a loop that iterates over the 3506132451Sroberto // classID values, which are known to be "small" integers. 3507132451Sroberto 3508132451Sroberto strcpy(ClassInfo.pc_clname, "TS"); 3509132451Sroberto ClassInfo.pc_cid = -1; 3510132451Sroberto rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3511132451Sroberto if (rslt < 0) return errno; 3512132451Sroberto assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3513132451Sroberto tsLimits.schedPolicy = ClassInfo.pc_cid; 3514132451Sroberto tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3515132451Sroberto tsLimits.minPrio = -tsLimits.maxPrio; 3516132451Sroberto 3517132451Sroberto strcpy(ClassInfo.pc_clname, "IA"); 3518132451Sroberto ClassInfo.pc_cid = -1; 3519132451Sroberto rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3520132451Sroberto if (rslt < 0) return errno; 3521132451Sroberto assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3522132451Sroberto iaLimits.schedPolicy = ClassInfo.pc_cid; 3523132451Sroberto iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3524132451Sroberto iaLimits.minPrio = -iaLimits.maxPrio; 3525132451Sroberto 3526132451Sroberto strcpy(ClassInfo.pc_clname, "RT"); 3527132451Sroberto ClassInfo.pc_cid = -1; 3528132451Sroberto rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3529132451Sroberto if (rslt < 0) return errno; 3530132451Sroberto assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3531132451Sroberto rtLimits.schedPolicy = ClassInfo.pc_cid; 3532132451Sroberto rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3533132451Sroberto rtLimits.minPrio = 0; 3534132451Sroberto 3535132451Sroberto 3536132451Sroberto // Query our "current" scheduling class. 3537132451Sroberto // This will normally be IA,TS or, rarely, RT. 3538132451Sroberto memset (&ParmInfo, 0, sizeof(ParmInfo)); 3539132451Sroberto ParmInfo.pc_cid = PC_CLNULL; 3540132451Sroberto rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 354154359Sroberto if ( rslt < 0 ) return errno; 3542132451Sroberto myClass = ParmInfo.pc_cid; 3543132451Sroberto 3544132451Sroberto // We now know our scheduling classId, get specific information 3545132451Sroberto // the class. 3546132451Sroberto ClassInfo.pc_cid = myClass; 3547132451Sroberto ClassInfo.pc_clname[0] = 0; 3548132451Sroberto rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3549132451Sroberto if ( rslt < 0 ) return errno; 3550132451Sroberto 3551132451Sroberto if (ThreadPriorityVerbose) 3552132451Sroberto tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3553132451Sroberto 3554132451Sroberto memset(&ParmInfo, 0, sizeof(pcparms_t)); 3555132451Sroberto ParmInfo.pc_cid = PC_CLNULL; 3556132451Sroberto rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3557132451Sroberto if (rslt < 0) return errno; 3558182007Sroberto 3559132451Sroberto if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 356056746Sroberto myMin = rtLimits.minPrio; 356154359Sroberto myMax = rtLimits.maxPrio; 356256746Sroberto } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 356356746Sroberto iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 356456746Sroberto myMin = iaLimits.minPrio; 3565132451Sroberto myMax = iaLimits.maxPrio; 356656746Sroberto myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 356782498Sroberto } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 356856746Sroberto tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3569132451Sroberto myMin = tsLimits.minPrio; 3570132451Sroberto myMax = tsLimits.maxPrio; 357156746Sroberto myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 357256746Sroberto } else { 3573132451Sroberto // No clue - punt 3574132451Sroberto if (ThreadPriorityVerbose) 3575132451Sroberto tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3576132451Sroberto return EINVAL; // no clue, punt 3577132451Sroberto } 3578132451Sroberto 3579132451Sroberto if (ThreadPriorityVerbose) 3580132451Sroberto tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3581132451Sroberto 3582132451Sroberto priocntl_enable = true; // Enable changing priorities 3583132451Sroberto return 0; 3584132451Sroberto} 3585132451Sroberto 3586132451Sroberto#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3587132451Sroberto#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3588132451Sroberto#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3589132451Sroberto 3590132451Sroberto 3591132451Sroberto// scale_to_lwp_priority 3592132451Sroberto// 3593132451Sroberto// Convert from the libthread "thr_setprio" scale to our current 3594132451Sroberto// lwp scheduling class scale. 3595132451Sroberto// 3596132451Srobertostatic 3597132451Srobertoint scale_to_lwp_priority (int rMin, int rMax, int x) 3598132451Sroberto{ 3599132451Sroberto int v; 3600132451Sroberto 3601132451Sroberto if (x == 127) return rMax; // avoid round-down 360256746Sroberto v = (((x*(rMax-rMin)))/128)+rMin; 360356746Sroberto return v; 360456746Sroberto} 3605132451Sroberto 3606132451Sroberto 3607132451Sroberto// set_lwp_priority 3608132451Sroberto// 3609132451Sroberto// Set the priority of the lwp. This call should only be made 3610132451Sroberto// when using bound threads (T2 threads are bound by default). 361156746Sroberto// 361282498Srobertoint set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3613132451Sroberto{ 3614132451Sroberto int rslt; 361582498Sroberto int Actual, Expected, prv; 361682498Sroberto pcparms_t ParmInfo; // for GET-SET 3617132451Sroberto#ifdef ASSERT 3618132451Sroberto pcparms_t ReadBack; // for readback 361982498Sroberto#endif 3620132451Sroberto 3621132451Sroberto // Set priority via PC_GETPARMS, update, PC_SETPARMS 3622132451Sroberto // Query current values. 3623132451Sroberto // TODO: accelerate this by eliminating the PC_GETPARMS call. 3624132451Sroberto // Cache "pcparms_t" in global ParmCache. 3625132451Sroberto // TODO: elide set-to-same-value 3626132451Sroberto 3627132451Sroberto // If something went wrong on init, don't change priorities. 3628132451Sroberto if ( !priocntl_enable ) { 3629132451Sroberto if (ThreadPriorityVerbose) 3630132451Sroberto tty->print_cr("Trying to set priority but init failed, ignoring"); 3631132451Sroberto return EINVAL; 3632132451Sroberto } 3633132451Sroberto 3634132451Sroberto 3635132451Sroberto // If lwp hasn't started yet, just return 3636132451Sroberto // the _start routine will call us again. 3637132451Sroberto if ( lwpid <= 0 ) { 3638132451Sroberto if (ThreadPriorityVerbose) { 3639132451Sroberto tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3640132451Sroberto ThreadID, newPrio); 3641132451Sroberto } 3642132451Sroberto return 0; 3643132451Sroberto } 3644132451Sroberto 3645132451Sroberto if (ThreadPriorityVerbose) { 3646132451Sroberto tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3647132451Sroberto ThreadID, lwpid, newPrio); 3648132451Sroberto } 3649132451Sroberto 3650132451Sroberto memset(&ParmInfo, 0, sizeof(pcparms_t)); 3651132451Sroberto ParmInfo.pc_cid = PC_CLNULL; 3652132451Sroberto rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3653132451Sroberto if (rslt < 0) return errno; 3654132451Sroberto 3655132451Sroberto if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3656132451Sroberto rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3657132451Sroberto rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3658132451Sroberto rtInfo->rt_tqsecs = RT_NOCHANGE; 3659132451Sroberto rtInfo->rt_tqnsecs = RT_NOCHANGE; 3660132451Sroberto if (ThreadPriorityVerbose) { 3661132451Sroberto tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3662132451Sroberto } 3663132451Sroberto } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3664132451Sroberto iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3665132451Sroberto int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3666132451Sroberto iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3667132451Sroberto iaInfo->ia_uprilim = IA_NOCHANGE; 3668132451Sroberto iaInfo->ia_nice = IA_NOCHANGE; 3669132451Sroberto iaInfo->ia_mode = IA_NOCHANGE; 3670132451Sroberto if (ThreadPriorityVerbose) { 3671132451Sroberto tty->print_cr ("IA: [%d...%d] %d->%d\n", 3672132451Sroberto iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3673132451Sroberto } 3674132451Sroberto } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3675132451Sroberto tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3676132451Sroberto int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 367782498Sroberto prv = tsInfo->ts_upri; 3678132451Sroberto tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 367982498Sroberto tsInfo->ts_uprilim = IA_NOCHANGE; 368082498Sroberto if (ThreadPriorityVerbose) { 368182498Sroberto tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3682132451Sroberto prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3683132451Sroberto } 3684132451Sroberto if (prv == tsInfo->ts_upri) return 0; 3685132451Sroberto } else { 3686132451Sroberto if ( ThreadPriorityVerbose ) { 3687132451Sroberto tty->print_cr ("Unknown scheduling class\n"); 3688132451Sroberto } 3689132451Sroberto return EINVAL; // no clue, punt 3690182007Sroberto } 3691132451Sroberto 3692132451Sroberto rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3693182007Sroberto if (ThreadPriorityVerbose && rslt) { 3694132451Sroberto tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3695132451Sroberto } 3696132451Sroberto if (rslt < 0) return errno; 3697132451Sroberto 3698132451Sroberto#ifdef ASSERT 3699132451Sroberto // Sanity check: read back what we just attempted to set. 3700132451Sroberto // In theory it could have changed in the interim ... 3701132451Sroberto // 3702132451Sroberto // The priocntl system call is tricky. 3703132451Sroberto // Sometimes it'll validate the priority value argument and 3704132451Sroberto // return EINVAL if unhappy. At other times it fails silently. 3705132451Sroberto // Readbacks are prudent. 3706132451Sroberto 3707132451Sroberto if (!ReadBackValidate) return 0; 3708132451Sroberto 3709132451Sroberto memset(&ReadBack, 0, sizeof(pcparms_t)); 3710132451Sroberto ReadBack.pc_cid = PC_CLNULL; 3711132451Sroberto rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3712132451Sroberto assert(rslt >= 0, "priocntl failed"); 3713132451Sroberto Actual = Expected = 0xBAD; 3714132451Sroberto assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3715132451Sroberto if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3716132451Sroberto Actual = RTPRI(ReadBack)->rt_pri; 3717132451Sroberto Expected = RTPRI(ParmInfo)->rt_pri; 3718132451Sroberto } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3719132451Sroberto Actual = IAPRI(ReadBack)->ia_upri; 3720132451Sroberto Expected = IAPRI(ParmInfo)->ia_upri; 3721132451Sroberto } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3722132451Sroberto Actual = TSPRI(ReadBack)->ts_upri; 3723132451Sroberto Expected = TSPRI(ParmInfo)->ts_upri; 3724132451Sroberto } else { 3725132451Sroberto if ( ThreadPriorityVerbose ) { 3726132451Sroberto tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3727132451Sroberto } 3728132451Sroberto } 3729132451Sroberto 373054359Sroberto if (Actual != Expected) { 373154359Sroberto if ( ThreadPriorityVerbose ) { 373254359Sroberto tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3733 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3734 } 3735 } 3736#endif 3737 3738 return 0; 3739} 3740 3741 3742 3743// Solaris only gives access to 128 real priorities at a time, 3744// so we expand Java's ten to fill this range. This would be better 3745// if we dynamically adjusted relative priorities. 3746// 3747// The ThreadPriorityPolicy option allows us to select 2 different 3748// priority scales. 3749// 3750// ThreadPriorityPolicy=0 3751// Since the Solaris' default priority is MaximumPriority, we do not 3752// set a priority lower than Max unless a priority lower than 3753// NormPriority is requested. 3754// 3755// ThreadPriorityPolicy=1 3756// This mode causes the priority table to get filled with 3757// linear values. NormPriority get's mapped to 50% of the 3758// Maximum priority an so on. This will cause VM threads 3759// to get unfair treatment against other Solaris processes 3760// which do not explicitly alter their thread priorities. 3761// 3762 3763 3764int os::java_to_os_priority[MaxPriority + 1] = { 3765 -99999, // 0 Entry should never be used 3766 3767 0, // 1 MinPriority 3768 32, // 2 3769 64, // 3 3770 3771 96, // 4 3772 127, // 5 NormPriority 3773 127, // 6 3774 3775 127, // 7 3776 127, // 8 3777 127, // 9 NearMaxPriority 3778 3779 127 // 10 MaxPriority 3780}; 3781 3782 3783OSReturn os::set_native_priority(Thread* thread, int newpri) { 3784 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3785 if ( !UseThreadPriorities ) return OS_OK; 3786 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 3787 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 3788 status |= (set_lwp_priority (thread->osthread()->thread_id(), 3789 thread->osthread()->lwp_id(), newpri )); 3790 return (status == 0) ? OS_OK : OS_ERR; 3791} 3792 3793 3794OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 3795 int p; 3796 if ( !UseThreadPriorities ) { 3797 *priority_ptr = NormalPriority; 3798 return OS_OK; 3799 } 3800 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3801 if (status != 0) { 3802 return OS_ERR; 3803 } 3804 *priority_ptr = p; 3805 return OS_OK; 3806} 3807 3808 3809// Hint to the underlying OS that a task switch would not be good. 3810// Void return because it's a hint and can fail. 3811void os::hint_no_preempt() { 3812 schedctl_start(schedctl_init()); 3813} 3814 3815void os::interrupt(Thread* thread) { 3816 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3817 3818 OSThread* osthread = thread->osthread(); 3819 3820 int isInterrupted = osthread->interrupted(); 3821 if (!isInterrupted) { 3822 osthread->set_interrupted(true); 3823 OrderAccess::fence(); 3824 // os::sleep() is implemented with either poll (NULL,0,timeout) or 3825 // by parking on _SleepEvent. If the former, thr_kill will unwedge 3826 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 3827 ParkEvent * const slp = thread->_SleepEvent ; 3828 if (slp != NULL) slp->unpark() ; 3829 } 3830 3831 // For JSR166: unpark after setting status but before thr_kill -dl 3832 if (thread->is_Java_thread()) { 3833 ((JavaThread*)thread)->parker()->unpark(); 3834 } 3835 3836 // Handle interruptible wait() ... 3837 ParkEvent * const ev = thread->_ParkEvent ; 3838 if (ev != NULL) ev->unpark() ; 3839 3840 // When events are used everywhere for os::sleep, then this thr_kill 3841 // will only be needed if UseVMInterruptibleIO is true. 3842 3843 if (!isInterrupted) { 3844 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 3845 assert_status(status == 0, status, "thr_kill"); 3846 3847 // Bump thread interruption counter 3848 RuntimeService::record_thread_interrupt_signaled_count(); 3849 } 3850} 3851 3852 3853bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3854 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3855 3856 OSThread* osthread = thread->osthread(); 3857 3858 bool res = osthread->interrupted(); 3859 3860 // NOTE that since there is no "lock" around these two operations, 3861 // there is the possibility that the interrupted flag will be 3862 // "false" but that the interrupt event will be set. This is 3863 // intentional. The effect of this is that Object.wait() will appear 3864 // to have a spurious wakeup, which is not harmful, and the 3865 // possibility is so rare that it is not worth the added complexity 3866 // to add yet another lock. It has also been recommended not to put 3867 // the interrupted flag into the os::Solaris::Event structure, 3868 // because it hides the issue. 3869 if (res && clear_interrupted) { 3870 osthread->set_interrupted(false); 3871 } 3872 return res; 3873} 3874 3875 3876void os::print_statistics() { 3877} 3878 3879int os::message_box(const char* title, const char* message) { 3880 int i; 3881 fdStream err(defaultStream::error_fd()); 3882 for (i = 0; i < 78; i++) err.print_raw("="); 3883 err.cr(); 3884 err.print_raw_cr(title); 3885 for (i = 0; i < 78; i++) err.print_raw("-"); 3886 err.cr(); 3887 err.print_raw_cr(message); 3888 for (i = 0; i < 78; i++) err.print_raw("="); 3889 err.cr(); 3890 3891 char buf[16]; 3892 // Prevent process from exiting upon "read error" without consuming all CPU 3893 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3894 3895 return buf[0] == 'y' || buf[0] == 'Y'; 3896} 3897 3898// A lightweight implementation that does not suspend the target thread and 3899// thus returns only a hint. Used for profiling only! 3900ExtendedPC os::get_thread_pc(Thread* thread) { 3901 // Make sure that it is called by the watcher and the Threads lock is owned. 3902 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3903 // For now, is only used to profile the VM Thread 3904 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3905 ExtendedPC epc; 3906 3907 GetThreadPC_Callback cb(ProfileVM_lock); 3908 OSThread *osthread = thread->osthread(); 3909 const int time_to_wait = 400; // 400ms wait for initial response 3910 int status = cb.interrupt(thread, time_to_wait); 3911 3912 if (cb.is_done() ) { 3913 epc = cb.addr(); 3914 } else { 3915 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 3916 osthread->thread_id(), status);); 3917 // epc is already NULL 3918 } 3919 return epc; 3920} 3921 3922 3923// This does not do anything on Solaris. This is basically a hook for being 3924// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3925void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 3926 f(value, method, args, thread); 3927} 3928 3929// This routine may be used by user applications as a "hook" to catch signals. 3930// The user-defined signal handler must pass unrecognized signals to this 3931// routine, and if it returns true (non-zero), then the signal handler must 3932// return immediately. If the flag "abort_if_unrecognized" is true, then this 3933// routine will never retun false (zero), but instead will execute a VM panic 3934// routine kill the process. 3935// 3936// If this routine returns false, it is OK to call it again. This allows 3937// the user-defined signal handler to perform checks either before or after 3938// the VM performs its own checks. Naturally, the user code would be making 3939// a serious error if it tried to handle an exception (such as a null check 3940// or breakpoint) that the VM was generating for its own correct operation. 3941// 3942// This routine may recognize any of the following kinds of signals: 3943// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3944// os::Solaris::SIGasync 3945// It should be consulted by handlers for any of those signals. 3946// It explicitly does not recognize os::Solaris::SIGinterrupt 3947// 3948// The caller of this routine must pass in the three arguments supplied 3949// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3950// field of the structure passed to sigaction(). This routine assumes that 3951// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3952// 3953// Note that the VM will print warnings if it detects conflicting signal 3954// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3955// 3956extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 3957 3958 3959void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3960 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3961} 3962 3963/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 3964 is needed to provoke threads blocked on IO to return an EINTR 3965 Note: this explicitly does NOT call JVM_handle_solaris_signal and 3966 does NOT participate in signal chaining due to requirement for 3967 NOT setting SA_RESTART to make EINTR work. */ 3968extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 3969 if (UseSignalChaining) { 3970 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 3971 if (actp && actp->sa_handler) { 3972 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 3973 } 3974 } 3975} 3976 3977// This boolean allows users to forward their own non-matching signals 3978// to JVM_handle_solaris_signal, harmlessly. 3979bool os::Solaris::signal_handlers_are_installed = false; 3980 3981// For signal-chaining 3982bool os::Solaris::libjsig_is_loaded = false; 3983typedef struct sigaction *(*get_signal_t)(int); 3984get_signal_t os::Solaris::get_signal_action = NULL; 3985 3986struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3987 struct sigaction *actp = NULL; 3988 3989 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 3990 // Retrieve the old signal handler from libjsig 3991 actp = (*get_signal_action)(sig); 3992 } 3993 if (actp == NULL) { 3994 // Retrieve the preinstalled signal handler from jvm 3995 actp = get_preinstalled_handler(sig); 3996 } 3997 3998 return actp; 3999} 4000 4001static bool call_chained_handler(struct sigaction *actp, int sig, 4002 siginfo_t *siginfo, void *context) { 4003 // Call the old signal handler 4004 if (actp->sa_handler == SIG_DFL) { 4005 // It's more reasonable to let jvm treat it as an unexpected exception 4006 // instead of taking the default action. 4007 return false; 4008 } else if (actp->sa_handler != SIG_IGN) { 4009 if ((actp->sa_flags & SA_NODEFER) == 0) { 4010 // automaticlly block the signal 4011 sigaddset(&(actp->sa_mask), sig); 4012 } 4013 4014 sa_handler_t hand; 4015 sa_sigaction_t sa; 4016 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4017 // retrieve the chained handler 4018 if (siginfo_flag_set) { 4019 sa = actp->sa_sigaction; 4020 } else { 4021 hand = actp->sa_handler; 4022 } 4023 4024 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4025 actp->sa_handler = SIG_DFL; 4026 } 4027 4028 // try to honor the signal mask 4029 sigset_t oset; 4030 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4031 4032 // call into the chained handler 4033 if (siginfo_flag_set) { 4034 (*sa)(sig, siginfo, context); 4035 } else { 4036 (*hand)(sig); 4037 } 4038 4039 // restore the signal mask 4040 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4041 } 4042 // Tell jvm's signal handler the signal is taken care of. 4043 return true; 4044} 4045 4046bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4047 bool chained = false; 4048 // signal-chaining 4049 if (UseSignalChaining) { 4050 struct sigaction *actp = get_chained_signal_action(sig); 4051 if (actp != NULL) { 4052 chained = call_chained_handler(actp, sig, siginfo, context); 4053 } 4054 } 4055 return chained; 4056} 4057 4058struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4059 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4060 if (preinstalled_sigs[sig] != 0) { 4061 return &chainedsigactions[sig]; 4062 } 4063 return NULL; 4064} 4065 4066void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4067 4068 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4069 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4070 chainedsigactions[sig] = oldAct; 4071 preinstalled_sigs[sig] = 1; 4072} 4073 4074void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4075 // Check for overwrite. 4076 struct sigaction oldAct; 4077 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4078 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4079 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4080 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4081 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4082 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4083 if (AllowUserSignalHandlers || !set_installed) { 4084 // Do not overwrite; user takes responsibility to forward to us. 4085 return; 4086 } else if (UseSignalChaining) { 4087 if (oktochain) { 4088 // save the old handler in jvm 4089 save_preinstalled_handler(sig, oldAct); 4090 } else { 4091 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4092 } 4093 // libjsig also interposes the sigaction() call below and saves the 4094 // old sigaction on it own. 4095 } else { 4096 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); 4097 } 4098 } 4099 4100 struct sigaction sigAct; 4101 sigfillset(&(sigAct.sa_mask)); 4102 sigAct.sa_handler = SIG_DFL; 4103 4104 sigAct.sa_sigaction = signalHandler; 4105 // Handle SIGSEGV on alternate signal stack if 4106 // not using stack banging 4107 if (!UseStackBanging && sig == SIGSEGV) { 4108 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4109 // Interruptible i/o requires SA_RESTART cleared so EINTR 4110 // is returned instead of restarting system calls 4111 } else if (sig == os::Solaris::SIGinterrupt()) { 4112 sigemptyset(&sigAct.sa_mask); 4113 sigAct.sa_handler = NULL; 4114 sigAct.sa_flags = SA_SIGINFO; 4115 sigAct.sa_sigaction = sigINTRHandler; 4116 } else { 4117 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4118 } 4119 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4120 4121 sigaction(sig, &sigAct, &oldAct); 4122 4123 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4124 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4125 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4126} 4127 4128 4129#define DO_SIGNAL_CHECK(sig) \ 4130 if (!sigismember(&check_signal_done, sig)) \ 4131 os::Solaris::check_signal_handler(sig) 4132 4133// This method is a periodic task to check for misbehaving JNI applications 4134// under CheckJNI, we can add any periodic checks here 4135 4136void os::run_periodic_checks() { 4137 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4138 // thereby preventing a NULL checks. 4139 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4140 4141 if (check_signals == false) return; 4142 4143 // SEGV and BUS if overridden could potentially prevent 4144 // generation of hs*.log in the event of a crash, debugging 4145 // such a case can be very challenging, so we absolutely 4146 // check for the following for a good measure: 4147 DO_SIGNAL_CHECK(SIGSEGV); 4148 DO_SIGNAL_CHECK(SIGILL); 4149 DO_SIGNAL_CHECK(SIGFPE); 4150 DO_SIGNAL_CHECK(SIGBUS); 4151 DO_SIGNAL_CHECK(SIGPIPE); 4152 DO_SIGNAL_CHECK(SIGXFSZ); 4153 4154 // ReduceSignalUsage allows the user to override these handlers 4155 // see comments at the very top and jvm_solaris.h 4156 if (!ReduceSignalUsage) { 4157 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4158 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4159 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4160 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4161 } 4162 4163 // See comments above for using JVM1/JVM2 and UseAltSigs 4164 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4165 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4166 4167} 4168 4169typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4170 4171static os_sigaction_t os_sigaction = NULL; 4172 4173void os::Solaris::check_signal_handler(int sig) { 4174 char buf[O_BUFLEN]; 4175 address jvmHandler = NULL; 4176 4177 struct sigaction act; 4178 if (os_sigaction == NULL) { 4179 // only trust the default sigaction, in case it has been interposed 4180 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4181 if (os_sigaction == NULL) return; 4182 } 4183 4184 os_sigaction(sig, (struct sigaction*)NULL, &act); 4185 4186 address thisHandler = (act.sa_flags & SA_SIGINFO) 4187 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4188 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4189 4190 4191 switch(sig) { 4192 case SIGSEGV: 4193 case SIGBUS: 4194 case SIGFPE: 4195 case SIGPIPE: 4196 case SIGXFSZ: 4197 case SIGILL: 4198 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4199 break; 4200 4201 case SHUTDOWN1_SIGNAL: 4202 case SHUTDOWN2_SIGNAL: 4203 case SHUTDOWN3_SIGNAL: 4204 case BREAK_SIGNAL: 4205 jvmHandler = (address)user_handler(); 4206 break; 4207 4208 default: 4209 int intrsig = os::Solaris::SIGinterrupt(); 4210 int asynsig = os::Solaris::SIGasync(); 4211 4212 if (sig == intrsig) { 4213 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4214 } else if (sig == asynsig) { 4215 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4216 } else { 4217 return; 4218 } 4219 break; 4220 } 4221 4222 4223 if (thisHandler != jvmHandler) { 4224 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4225 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4226 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4227 // No need to check this sig any longer 4228 sigaddset(&check_signal_done, sig); 4229 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4230 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4231 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4232 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4233 // No need to check this sig any longer 4234 sigaddset(&check_signal_done, sig); 4235 } 4236 4237 // Print all the signal handler state 4238 if (sigismember(&check_signal_done, sig)) { 4239 print_signal_handlers(tty, buf, O_BUFLEN); 4240 } 4241 4242} 4243 4244void os::Solaris::install_signal_handlers() { 4245 bool libjsigdone = false; 4246 signal_handlers_are_installed = true; 4247 4248 // signal-chaining 4249 typedef void (*signal_setting_t)(); 4250 signal_setting_t begin_signal_setting = NULL; 4251 signal_setting_t end_signal_setting = NULL; 4252 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4253 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4254 if (begin_signal_setting != NULL) { 4255 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4256 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4257 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4258 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4259 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4260 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4261 libjsig_is_loaded = true; 4262 if (os::Solaris::get_libjsig_version != NULL) { 4263 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4264 } 4265 assert(UseSignalChaining, "should enable signal-chaining"); 4266 } 4267 if (libjsig_is_loaded) { 4268 // Tell libjsig jvm is setting signal handlers 4269 (*begin_signal_setting)(); 4270 } 4271 4272 set_signal_handler(SIGSEGV, true, true); 4273 set_signal_handler(SIGPIPE, true, true); 4274 set_signal_handler(SIGXFSZ, true, true); 4275 set_signal_handler(SIGBUS, true, true); 4276 set_signal_handler(SIGILL, true, true); 4277 set_signal_handler(SIGFPE, true, true); 4278 4279 4280 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4281 4282 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4283 // can not register overridable signals which might be > 32 4284 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4285 // Tell libjsig jvm has finished setting signal handlers 4286 (*end_signal_setting)(); 4287 libjsigdone = true; 4288 } 4289 } 4290 4291 // Never ok to chain our SIGinterrupt 4292 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4293 set_signal_handler(os::Solaris::SIGasync(), true, true); 4294 4295 if (libjsig_is_loaded && !libjsigdone) { 4296 // Tell libjsig jvm finishes setting signal handlers 4297 (*end_signal_setting)(); 4298 } 4299 4300 // We don't activate signal checker if libjsig is in place, we trust ourselves 4301 // and if UserSignalHandler is installed all bets are off 4302 if (CheckJNICalls) { 4303 if (libjsig_is_loaded) { 4304 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4305 check_signals = false; 4306 } 4307 if (AllowUserSignalHandlers) { 4308 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4309 check_signals = false; 4310 } 4311 } 4312} 4313 4314 4315void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4316 4317const char * signames[] = { 4318 "SIG0", 4319 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4320 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4321 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4322 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4323 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4324 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4325 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4326 "SIGCANCEL", "SIGLOST" 4327}; 4328 4329const char* os::exception_name(int exception_code, char* buf, size_t size) { 4330 if (0 < exception_code && exception_code <= SIGRTMAX) { 4331 // signal 4332 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4333 jio_snprintf(buf, size, "%s", signames[exception_code]); 4334 } else { 4335 jio_snprintf(buf, size, "SIG%d", exception_code); 4336 } 4337 return buf; 4338 } else { 4339 return NULL; 4340 } 4341} 4342 4343// (Static) wrappers for the new libthread API 4344int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4345int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4346int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4347int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4348int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4349 4350// (Static) wrappers for the liblgrp API 4351os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4352os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4353os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4354os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4355os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4356os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4357os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4358os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4359 4360// (Static) wrapper for meminfo() call. 4361os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4362 4363static address resolve_symbol(const char *name) { 4364 address addr; 4365 4366 addr = (address) dlsym(RTLD_DEFAULT, name); 4367 if(addr == NULL) { 4368 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4369 addr = (address) dlsym(RTLD_NEXT, name); 4370 if(addr == NULL) { 4371 fatal(dlerror()); 4372 } 4373 } 4374 return addr; 4375} 4376 4377 4378 4379// isT2_libthread() 4380// 4381// Routine to determine if we are currently using the new T2 libthread. 4382// 4383// We determine if we are using T2 by reading /proc/self/lstatus and 4384// looking for a thread with the ASLWP bit set. If we find this status 4385// bit set, we must assume that we are NOT using T2. The T2 team 4386// has approved this algorithm. 4387// 4388// We need to determine if we are running with the new T2 libthread 4389// since setting native thread priorities is handled differently 4390// when using this library. All threads created using T2 are bound 4391// threads. Calling thr_setprio is meaningless in this case. 4392// 4393bool isT2_libthread() { 4394 int i, rslt; 4395 static prheader_t * lwpArray = NULL; 4396 static int lwpSize = 0; 4397 static int lwpFile = -1; 4398 lwpstatus_t * that; 4399 int aslwpcount; 4400 char lwpName [128]; 4401 bool isT2 = false; 4402 4403#define ADR(x) ((uintptr_t)(x)) 4404#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4405 4406 aslwpcount = 0; 4407 lwpSize = 16*1024; 4408 lwpArray = ( prheader_t *)NEW_C_HEAP_ARRAY (char, lwpSize); 4409 lwpFile = open ("/proc/self/lstatus", O_RDONLY, 0); 4410 if (lwpArray == NULL) { 4411 if ( ThreadPriorityVerbose ) warning ("Couldn't allocate T2 Check array\n"); 4412 return(isT2); 4413 } 4414 if (lwpFile < 0) { 4415 if ( ThreadPriorityVerbose ) warning ("Couldn't open /proc/self/lstatus\n"); 4416 return(isT2); 4417 } 4418 for (;;) { 4419 lseek (lwpFile, 0, SEEK_SET); 4420 rslt = read (lwpFile, lwpArray, lwpSize); 4421 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4422 break; 4423 } 4424 FREE_C_HEAP_ARRAY(char, lwpArray); 4425 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4426 lwpArray = ( prheader_t *)NEW_C_HEAP_ARRAY (char, lwpSize); 4427 if (lwpArray == NULL) { 4428 if ( ThreadPriorityVerbose ) warning ("Couldn't allocate T2 Check array\n"); 4429 return(isT2); 4430 } 4431 } 4432 4433 // We got a good snapshot - now iterate over the list. 4434 for (i = 0; i < lwpArray->pr_nent; i++ ) { 4435 that = LWPINDEX(lwpArray,i); 4436 if (that->pr_flags & PR_ASLWP) { 4437 aslwpcount++; 4438 } 4439 } 4440 if ( aslwpcount == 0 ) isT2 = true; 4441 4442 FREE_C_HEAP_ARRAY(char, lwpArray); 4443 close (lwpFile); 4444 if ( ThreadPriorityVerbose ) { 4445 if ( isT2 ) tty->print_cr("We are running with a T2 libthread\n"); 4446 else tty->print_cr("We are not running with a T2 libthread\n"); 4447 } 4448 return (isT2); 4449} 4450 4451 4452void os::Solaris::libthread_init() { 4453 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4454 4455 // Determine if we are running with the new T2 libthread 4456 os::Solaris::set_T2_libthread(isT2_libthread()); 4457 4458 lwp_priocntl_init(); 4459 4460 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4461 if(func == NULL) { 4462 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4463 // Guarantee that this VM is running on an new enough OS (5.6 or 4464 // later) that it will have a new enough libthread.so. 4465 guarantee(func != NULL, "libthread.so is too old."); 4466 } 4467 4468 // Initialize the new libthread getstate API wrappers 4469 func = resolve_symbol("thr_getstate"); 4470 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4471 4472 func = resolve_symbol("thr_setstate"); 4473 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4474 4475 func = resolve_symbol("thr_setmutator"); 4476 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4477 4478 func = resolve_symbol("thr_suspend_mutator"); 4479 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4480 4481 func = resolve_symbol("thr_continue_mutator"); 4482 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4483 4484 int size; 4485 void (*handler_info_func)(address *, int *); 4486 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4487 handler_info_func(&handler_start, &size); 4488 handler_end = handler_start + size; 4489} 4490 4491 4492int_fnP_mutex_tP os::Solaris::_mutex_lock; 4493int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4494int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4495int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4496int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4497int os::Solaris::_mutex_scope = USYNC_THREAD; 4498 4499int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4500int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4501int_fnP_cond_tP os::Solaris::_cond_signal; 4502int_fnP_cond_tP os::Solaris::_cond_broadcast; 4503int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4504int_fnP_cond_tP os::Solaris::_cond_destroy; 4505int os::Solaris::_cond_scope = USYNC_THREAD; 4506 4507void os::Solaris::synchronization_init() { 4508 if(UseLWPSynchronization) { 4509 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4510 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4511 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4512 os::Solaris::set_mutex_init(lwp_mutex_init); 4513 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4514 os::Solaris::set_mutex_scope(USYNC_THREAD); 4515 4516 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4517 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4518 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4519 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4520 os::Solaris::set_cond_init(lwp_cond_init); 4521 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4522 os::Solaris::set_cond_scope(USYNC_THREAD); 4523 } 4524 else { 4525 os::Solaris::set_mutex_scope(USYNC_THREAD); 4526 os::Solaris::set_cond_scope(USYNC_THREAD); 4527 4528 if(UsePthreads) { 4529 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4530 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4531 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4532 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4533 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4534 4535 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4536 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4537 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4538 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4539 os::Solaris::set_cond_init(pthread_cond_default_init); 4540 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4541 } 4542 else { 4543 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4544 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4545 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4546 os::Solaris::set_mutex_init(::mutex_init); 4547 os::Solaris::set_mutex_destroy(::mutex_destroy); 4548 4549 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4550 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4551 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4552 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4553 os::Solaris::set_cond_init(::cond_init); 4554 os::Solaris::set_cond_destroy(::cond_destroy); 4555 } 4556 } 4557} 4558 4559void os::Solaris::liblgrp_init() { 4560 void *handle = dlopen("liblgrp.so", RTLD_LAZY); 4561 if (handle != NULL) { 4562 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4563 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4564 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4565 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4566 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4567 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4568 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4569 dlsym(handle, "lgrp_cookie_stale"))); 4570 4571 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4572 set_lgrp_cookie(c); 4573 } else { 4574 warning("your OS does not support NUMA"); 4575 } 4576} 4577 4578void os::Solaris::misc_sym_init() { 4579 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); 4580 if(func == NULL) { 4581 func = (address) dlsym(RTLD_NEXT, "meminfo"); 4582 } 4583 if (func != NULL) { 4584 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4585 } 4586} 4587 4588// Symbol doesn't exist in Solaris 8 pset.h 4589#ifndef PS_MYID 4590#define PS_MYID -3 4591#endif 4592 4593// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4594typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4595static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4596 4597void init_pset_getloadavg_ptr(void) { 4598 pset_getloadavg_ptr = 4599 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4600 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4601 warning("pset_getloadavg function not found"); 4602 } 4603} 4604 4605int os::Solaris::_dev_zero_fd = -1; 4606 4607// this is called _before_ the global arguments have been parsed 4608void os::init(void) { 4609 _initial_pid = getpid(); 4610 4611 max_hrtime = first_hrtime = gethrtime(); 4612 4613 init_random(1234567); 4614 4615 page_size = sysconf(_SC_PAGESIZE); 4616 if (page_size == -1) 4617 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); 4618 init_page_sizes((size_t) page_size); 4619 4620 Solaris::initialize_system_info(); 4621 4622 int fd = open("/dev/zero", O_RDWR); 4623 if (fd < 0) { 4624 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); 4625 } else { 4626 Solaris::set_dev_zero_fd(fd); 4627 4628 // Close on exec, child won't inherit. 4629 fcntl(fd, F_SETFD, FD_CLOEXEC); 4630 } 4631 4632 clock_tics_per_sec = CLK_TCK; 4633 4634 // check if dladdr1() exists; dladdr1 can provide more information than 4635 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4636 // and is available on linker patches for 5.7 and 5.8. 4637 // libdl.so must have been loaded, this call is just an entry lookup 4638 void * hdl = dlopen("libdl.so", RTLD_NOW); 4639 if (hdl) 4640 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4641 4642 // (Solaris only) this switches to calls that actually do locking. 4643 ThreadCritical::initialize(); 4644 4645 main_thread = thr_self(); 4646 4647 // Constant minimum stack size allowed. It must be at least 4648 // the minimum of what the OS supports (thr_min_stack()), and 4649 // enough to allow the thread to get to user bytecode execution. 4650 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4651 // If the pagesize of the VM is greater than 8K determine the appropriate 4652 // number of initial guard pages. The user can change this with the 4653 // command line arguments, if needed. 4654 if (vm_page_size() > 8*K) { 4655 StackYellowPages = 1; 4656 StackRedPages = 1; 4657 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4658 } 4659} 4660 4661// To install functions for atexit system call 4662extern "C" { 4663 static void perfMemory_exit_helper() { 4664 perfMemory_exit(); 4665 } 4666} 4667 4668// this is called _after_ the global arguments have been parsed 4669jint os::init_2(void) { 4670 // try to enable extended file IO ASAP, see 6431278 4671 os::Solaris::try_enable_extended_io(); 4672 4673 // Allocate a single page and mark it as readable for safepoint polling. Also 4674 // use this first mmap call to check support for MAP_ALIGN. 4675 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4676 page_size, 4677 MAP_PRIVATE | MAP_ALIGN, 4678 PROT_READ); 4679 if (polling_page == NULL) { 4680 has_map_align = false; 4681 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4682 PROT_READ); 4683 } 4684 4685 os::set_polling_page(polling_page); 4686 4687#ifndef PRODUCT 4688 if( Verbose && PrintMiscellaneous ) 4689 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4690#endif 4691 4692 if (!UseMembar) { 4693 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4694 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4695 os::set_memory_serialize_page( mem_serialize_page ); 4696 4697#ifndef PRODUCT 4698 if(Verbose && PrintMiscellaneous) 4699 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4700#endif 4701} 4702 4703 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4704 4705 // Check minimum allowable stack size for thread creation and to initialize 4706 // the java system classes, including StackOverflowError - depends on page 4707 // size. Add a page for compiler2 recursion in main thread. 4708 // Add in BytesPerWord times page size to account for VM stack during 4709 // class initialization depending on 32 or 64 bit VM. 4710 guarantee((Solaris::min_stack_allowed >= 4711 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord 4712 COMPILER2_PRESENT(+1)) * page_size), 4713 "need to increase Solaris::min_stack_allowed on this platform"); 4714 4715 size_t threadStackSizeInBytes = ThreadStackSize * K; 4716 if (threadStackSizeInBytes != 0 && 4717 threadStackSizeInBytes < Solaris::min_stack_allowed) { 4718 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4719 Solaris::min_stack_allowed/K); 4720 return JNI_ERR; 4721 } 4722 4723 // For 64kbps there will be a 64kb page size, which makes 4724 // the usable default stack size quite a bit less. Increase the 4725 // stack for 64kb (or any > than 8kb) pages, this increases 4726 // virtual memory fragmentation (since we're not creating the 4727 // stack on a power of 2 boundary. The real fix for this 4728 // should be to fix the guard page mechanism. 4729 4730 if (vm_page_size() > 8*K) { 4731 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4732 ? threadStackSizeInBytes + 4733 ((StackYellowPages + StackRedPages) * vm_page_size()) 4734 : 0; 4735 ThreadStackSize = threadStackSizeInBytes/K; 4736 } 4737 4738 // Make the stack size a multiple of the page size so that 4739 // the yellow/red zones can be guarded. 4740 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4741 vm_page_size())); 4742 4743 Solaris::libthread_init(); 4744 if (UseNUMA) { 4745 Solaris::liblgrp_init(); 4746 } 4747 Solaris::misc_sym_init(); 4748 Solaris::signal_sets_init(); 4749 Solaris::init_signal_mem(); 4750 Solaris::install_signal_handlers(); 4751 4752 if (libjsigversion < JSIG_VERSION_1_4_1) { 4753 Maxlibjsigsigs = OLDMAXSIGNUM; 4754 } 4755 4756 // initialize synchronization primitives to use either thread or 4757 // lwp synchronization (controlled by UseLWPSynchronization) 4758 Solaris::synchronization_init(); 4759 4760 if (MaxFDLimit) { 4761 // set the number of file descriptors to max. print out error 4762 // if getrlimit/setrlimit fails but continue regardless. 4763 struct rlimit nbr_files; 4764 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4765 if (status != 0) { 4766 if (PrintMiscellaneous && (Verbose || WizardMode)) 4767 perror("os::init_2 getrlimit failed"); 4768 } else { 4769 nbr_files.rlim_cur = nbr_files.rlim_max; 4770 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4771 if (status != 0) { 4772 if (PrintMiscellaneous && (Verbose || WizardMode)) 4773 perror("os::init_2 setrlimit failed"); 4774 } 4775 } 4776 } 4777 4778 // Initialize HPI. 4779 jint hpi_result = hpi::initialize(); 4780 if (hpi_result != JNI_OK) { 4781 tty->print_cr("There was an error trying to initialize the HPI library."); 4782 return hpi_result; 4783 } 4784 4785 // Calculate theoretical max. size of Threads to guard gainst 4786 // artifical out-of-memory situations, where all available address- 4787 // space has been reserved by thread stacks. Default stack size is 1Mb. 4788 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4789 JavaThread::stack_size_at_create() : (1*K*K); 4790 assert(pre_thread_stack_size != 0, "Must have a stack"); 4791 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4792 // we should start doing Virtual Memory banging. Currently when the threads will 4793 // have used all but 200Mb of space. 4794 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4795 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4796 4797 // at-exit methods are called in the reverse order of their registration. 4798 // In Solaris 7 and earlier, atexit functions are called on return from 4799 // main or as a result of a call to exit(3C). There can be only 32 of 4800 // these functions registered and atexit() does not set errno. In Solaris 4801 // 8 and later, there is no limit to the number of functions registered 4802 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4803 // functions are called upon dlclose(3DL) in addition to return from main 4804 // and exit(3C). 4805 4806 if (PerfAllowAtExitRegistration) { 4807 // only register atexit functions if PerfAllowAtExitRegistration is set. 4808 // atexit functions can be delayed until process exit time, which 4809 // can be problematic for embedded VM situations. Embedded VMs should 4810 // call DestroyJavaVM() to assure that VM resources are released. 4811 4812 // note: perfMemory_exit_helper atexit function may be removed in 4813 // the future if the appropriate cleanup code can be added to the 4814 // VM_Exit VMOperation's doit method. 4815 if (atexit(perfMemory_exit_helper) != 0) { 4816 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4817 } 4818 } 4819 4820 // Init pset_loadavg function pointer 4821 init_pset_getloadavg_ptr(); 4822 4823 return JNI_OK; 4824} 4825 4826 4827// Mark the polling page as unreadable 4828void os::make_polling_page_unreadable(void) { 4829 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 4830 fatal("Could not disable polling page"); 4831}; 4832 4833// Mark the polling page as readable 4834void os::make_polling_page_readable(void) { 4835 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 4836 fatal("Could not enable polling page"); 4837}; 4838 4839// OS interface. 4840 4841int os::stat(const char *path, struct stat *sbuf) { 4842 char pathbuf[MAX_PATH]; 4843 if (strlen(path) > MAX_PATH - 1) { 4844 errno = ENAMETOOLONG; 4845 return -1; 4846 } 4847 hpi::native_path(strcpy(pathbuf, path)); 4848 return ::stat(pathbuf, sbuf); 4849} 4850 4851 4852bool os::check_heap(bool force) { return true; } 4853 4854typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 4855static vsnprintf_t sol_vsnprintf = NULL; 4856 4857int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 4858 if (!sol_vsnprintf) { 4859 //search for the named symbol in the objects that were loaded after libjvm 4860 void* where = RTLD_NEXT; 4861 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4862 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4863 if (!sol_vsnprintf){ 4864 //search for the named symbol in the objects that were loaded before libjvm 4865 where = RTLD_DEFAULT; 4866 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4867 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4868 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 4869 } 4870 } 4871 return (*sol_vsnprintf)(buf, count, fmt, argptr); 4872} 4873 4874 4875// Is a (classpath) directory empty? 4876bool os::dir_is_empty(const char* path) { 4877 DIR *dir = NULL; 4878 struct dirent *ptr; 4879 4880 dir = opendir(path); 4881 if (dir == NULL) return true; 4882 4883 /* Scan the directory */ 4884 bool result = true; 4885 char buf[sizeof(struct dirent) + MAX_PATH]; 4886 struct dirent *dbuf = (struct dirent *) buf; 4887 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4888 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4889 result = false; 4890 } 4891 } 4892 closedir(dir); 4893 return result; 4894} 4895 4896// create binary file, rewriting existing file if required 4897int os::create_binary_file(const char* path, bool rewrite_existing) { 4898 int oflags = O_WRONLY | O_CREAT; 4899 if (!rewrite_existing) { 4900 oflags |= O_EXCL; 4901 } 4902 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4903} 4904 4905// return current position of file pointer 4906jlong os::current_file_offset(int fd) { 4907 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4908} 4909 4910// move file pointer to the specified offset 4911jlong os::seek_to_file_offset(int fd, jlong offset) { 4912 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4913} 4914 4915// Map a block of memory. 4916char* os::map_memory(int fd, const char* file_name, size_t file_offset, 4917 char *addr, size_t bytes, bool read_only, 4918 bool allow_exec) { 4919 int prot; 4920 int flags; 4921 4922 if (read_only) { 4923 prot = PROT_READ; 4924 flags = MAP_SHARED; 4925 } else { 4926 prot = PROT_READ | PROT_WRITE; 4927 flags = MAP_PRIVATE; 4928 } 4929 4930 if (allow_exec) { 4931 prot |= PROT_EXEC; 4932 } 4933 4934 if (addr != NULL) { 4935 flags |= MAP_FIXED; 4936 } 4937 4938 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4939 fd, file_offset); 4940 if (mapped_address == MAP_FAILED) { 4941 return NULL; 4942 } 4943 return mapped_address; 4944} 4945 4946 4947// Remap a block of memory. 4948char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 4949 char *addr, size_t bytes, bool read_only, 4950 bool allow_exec) { 4951 // same as map_memory() on this OS 4952 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4953 allow_exec); 4954} 4955 4956 4957// Unmap a block of memory. 4958bool os::unmap_memory(char* addr, size_t bytes) { 4959 return munmap(addr, bytes) == 0; 4960} 4961 4962void os::pause() { 4963 char filename[MAX_PATH]; 4964 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4965 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4966 } else { 4967 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4968 } 4969 4970 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4971 if (fd != -1) { 4972 struct stat buf; 4973 close(fd); 4974 while (::stat(filename, &buf) == 0) { 4975 (void)::poll(NULL, 0, 100); 4976 } 4977 } else { 4978 jio_fprintf(stderr, 4979 "Could not open pause file '%s', continuing immediately.\n", filename); 4980 } 4981} 4982 4983#ifndef PRODUCT 4984#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4985// Turn this on if you need to trace synch operations. 4986// Set RECORD_SYNCH_LIMIT to a large-enough value, 4987// and call record_synch_enable and record_synch_disable 4988// around the computation of interest. 4989 4990void record_synch(char* name, bool returning); // defined below 4991 4992class RecordSynch { 4993 char* _name; 4994 public: 4995 RecordSynch(char* name) :_name(name) 4996 { record_synch(_name, false); } 4997 ~RecordSynch() { record_synch(_name, true); } 4998}; 4999 5000#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5001extern "C" ret name params { \ 5002 typedef ret name##_t params; \ 5003 static name##_t* implem = NULL; \ 5004 static int callcount = 0; \ 5005 if (implem == NULL) { \ 5006 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5007 if (implem == NULL) fatal(dlerror()); \ 5008 } \ 5009 ++callcount; \ 5010 RecordSynch _rs(#name); \ 5011 inner; \ 5012 return implem args; \ 5013} 5014// in dbx, examine callcounts this way: 5015// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5016 5017#define CHECK_POINTER_OK(p) \ 5018 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5019#define CHECK_MU \ 5020 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5021#define CHECK_CV \ 5022 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5023#define CHECK_P(p) \ 5024 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5025 5026#define CHECK_MUTEX(mutex_op) \ 5027CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5028 5029CHECK_MUTEX( mutex_lock) 5030CHECK_MUTEX( _mutex_lock) 5031CHECK_MUTEX( mutex_unlock) 5032CHECK_MUTEX(_mutex_unlock) 5033CHECK_MUTEX( mutex_trylock) 5034CHECK_MUTEX(_mutex_trylock) 5035 5036#define CHECK_COND(cond_op) \ 5037CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5038 5039CHECK_COND( cond_wait); 5040CHECK_COND(_cond_wait); 5041CHECK_COND(_cond_wait_cancel); 5042 5043#define CHECK_COND2(cond_op) \ 5044CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5045 5046CHECK_COND2( cond_timedwait); 5047CHECK_COND2(_cond_timedwait); 5048CHECK_COND2(_cond_timedwait_cancel); 5049 5050// do the _lwp_* versions too 5051#define mutex_t lwp_mutex_t 5052#define cond_t lwp_cond_t 5053CHECK_MUTEX( _lwp_mutex_lock) 5054CHECK_MUTEX( _lwp_mutex_unlock) 5055CHECK_MUTEX( _lwp_mutex_trylock) 5056CHECK_MUTEX( __lwp_mutex_lock) 5057CHECK_MUTEX( __lwp_mutex_unlock) 5058CHECK_MUTEX( __lwp_mutex_trylock) 5059CHECK_MUTEX(___lwp_mutex_lock) 5060CHECK_MUTEX(___lwp_mutex_unlock) 5061 5062CHECK_COND( _lwp_cond_wait); 5063CHECK_COND( __lwp_cond_wait); 5064CHECK_COND(___lwp_cond_wait); 5065 5066CHECK_COND2( _lwp_cond_timedwait); 5067CHECK_COND2( __lwp_cond_timedwait); 5068#undef mutex_t 5069#undef cond_t 5070 5071CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5072CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5073CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5074CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5075CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5076CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5077CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5078CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5079 5080 5081// recording machinery: 5082 5083enum { RECORD_SYNCH_LIMIT = 200 }; 5084char* record_synch_name[RECORD_SYNCH_LIMIT]; 5085void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5086bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5087thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5088int record_synch_count = 0; 5089bool record_synch_enabled = false; 5090 5091// in dbx, examine recorded data this way: 5092// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5093 5094void record_synch(char* name, bool returning) { 5095 if (record_synch_enabled) { 5096 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5097 record_synch_name[record_synch_count] = name; 5098 record_synch_returning[record_synch_count] = returning; 5099 record_synch_thread[record_synch_count] = thr_self(); 5100 record_synch_arg0ptr[record_synch_count] = &name; 5101 record_synch_count++; 5102 } 5103 // put more checking code here: 5104 // ... 5105 } 5106} 5107 5108void record_synch_enable() { 5109 // start collecting trace data, if not already doing so 5110 if (!record_synch_enabled) record_synch_count = 0; 5111 record_synch_enabled = true; 5112} 5113 5114void record_synch_disable() { 5115 // stop collecting trace data 5116 record_synch_enabled = false; 5117} 5118 5119#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5120#endif // PRODUCT 5121 5122const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5123const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5124 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5125 5126 5127// JVMTI & JVM monitoring and management support 5128// The thread_cpu_time() and current_thread_cpu_time() are only 5129// supported if is_thread_cpu_time_supported() returns true. 5130// They are not supported on Solaris T1. 5131 5132// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5133// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5134// of a thread. 5135// 5136// current_thread_cpu_time() and thread_cpu_time(Thread *) 5137// returns the fast estimate available on the platform. 5138 5139// hrtime_t gethrvtime() return value includes 5140// user time but does not include system time 5141jlong os::current_thread_cpu_time() { 5142 return (jlong) gethrvtime(); 5143} 5144 5145jlong os::thread_cpu_time(Thread *thread) { 5146 // return user level CPU time only to be consistent with 5147 // what current_thread_cpu_time returns. 5148 // thread_cpu_time_info() must be changed if this changes 5149 return os::thread_cpu_time(thread, false /* user time only */); 5150} 5151 5152jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5153 if (user_sys_cpu_time) { 5154 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5155 } else { 5156 return os::current_thread_cpu_time(); 5157 } 5158} 5159 5160jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5161 char proc_name[64]; 5162 int count; 5163 prusage_t prusage; 5164 jlong lwp_time; 5165 int fd; 5166 5167 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5168 getpid(), 5169 thread->osthread()->lwp_id()); 5170 fd = open(proc_name, O_RDONLY); 5171 if ( fd == -1 ) return -1; 5172 5173 do { 5174 count = pread(fd, 5175 (void *)&prusage.pr_utime, 5176 thr_time_size, 5177 thr_time_off); 5178 } while (count < 0 && errno == EINTR); 5179 close(fd); 5180 if ( count < 0 ) return -1; 5181 5182 if (user_sys_cpu_time) { 5183 // user + system CPU time 5184 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5185 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5186 (jlong)prusage.pr_stime.tv_nsec + 5187 (jlong)prusage.pr_utime.tv_nsec; 5188 } else { 5189 // user level CPU time only 5190 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5191 (jlong)prusage.pr_utime.tv_nsec; 5192 } 5193 5194 return(lwp_time); 5195} 5196 5197void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5198 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5199 info_ptr->may_skip_backward = false; // elapsed time not wall time 5200 info_ptr->may_skip_forward = false; // elapsed time not wall time 5201 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5202} 5203 5204void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5205 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5206 info_ptr->may_skip_backward = false; // elapsed time not wall time 5207 info_ptr->may_skip_forward = false; // elapsed time not wall time 5208 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5209} 5210 5211bool os::is_thread_cpu_time_supported() { 5212 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5213 return true; 5214 } else { 5215 return false; 5216 } 5217} 5218 5219// System loadavg support. Returns -1 if load average cannot be obtained. 5220// Return the load average for our processor set if the primitive exists 5221// (Solaris 9 and later). Otherwise just return system wide loadavg. 5222int os::loadavg(double loadavg[], int nelem) { 5223 if (pset_getloadavg_ptr != NULL) { 5224 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5225 } else { 5226 return ::getloadavg(loadavg, nelem); 5227 } 5228} 5229 5230//--------------------------------------------------------------------------------- 5231#ifndef PRODUCT 5232 5233static address same_page(address x, address y) { 5234 intptr_t page_bits = -os::vm_page_size(); 5235 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5236 return x; 5237 else if (x > y) 5238 return (address)(intptr_t(y) | ~page_bits) + 1; 5239 else 5240 return (address)(intptr_t(y) & page_bits); 5241} 5242 5243bool os::find(address addr) { 5244 Dl_info dlinfo; 5245 memset(&dlinfo, 0, sizeof(dlinfo)); 5246 if (dladdr(addr, &dlinfo)) { 5247#ifdef _LP64 5248 tty->print("0x%016lx: ", addr); 5249#else 5250 tty->print("0x%08x: ", addr); 5251#endif 5252 if (dlinfo.dli_sname != NULL) 5253 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5254 else if (dlinfo.dli_fname) 5255 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5256 else 5257 tty->print("<absolute address>"); 5258 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); 5259#ifdef _LP64 5260 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); 5261#else 5262 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); 5263#endif 5264 tty->cr(); 5265 5266 if (Verbose) { 5267 // decode some bytes around the PC 5268 address begin = same_page(addr-40, addr); 5269 address end = same_page(addr+40, addr); 5270 address lowest = (address) dlinfo.dli_sname; 5271 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5272 if (begin < lowest) begin = lowest; 5273 Dl_info dlinfo2; 5274 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5275 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5276 end = (address) dlinfo2.dli_saddr; 5277 Disassembler::decode(begin, end); 5278 } 5279 return true; 5280 } 5281 return false; 5282} 5283 5284#endif 5285 5286 5287// Following function has been added to support HotSparc's libjvm.so running 5288// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5289// src/solaris/hpi/native_threads in the EVM codebase. 5290// 5291// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5292// libraries and should thus be removed. We will leave it behind for a while 5293// until we no longer want to able to run on top of 1.3.0 Solaris production 5294// JDK. See 4341971. 5295 5296#define STACK_SLACK 0x800 5297 5298extern "C" { 5299 intptr_t sysThreadAvailableStackWithSlack() { 5300 stack_t st; 5301 intptr_t retval, stack_top; 5302 retval = thr_stksegment(&st); 5303 assert(retval == 0, "incorrect return value from thr_stksegment"); 5304 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5305 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5306 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5307 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5308 } 5309} 5310 5311// Just to get the Kernel build to link on solaris for testing. 5312 5313extern "C" { 5314class ASGCT_CallTrace; 5315void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5316 KERNEL_RETURN; 5317} 5318 5319 5320// ObjectMonitor park-unpark infrastructure ... 5321// 5322// We implement Solaris and Linux PlatformEvents with the 5323// obvious condvar-mutex-flag triple. 5324// Another alternative that works quite well is pipes: 5325// Each PlatformEvent consists of a pipe-pair. 5326// The thread associated with the PlatformEvent 5327// calls park(), which reads from the input end of the pipe. 5328// Unpark() writes into the other end of the pipe. 5329// The write-side of the pipe must be set NDELAY. 5330// Unfortunately pipes consume a large # of handles. 5331// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5332// Using pipes for the 1st few threads might be workable, however. 5333// 5334// park() is permitted to return spuriously. 5335// Callers of park() should wrap the call to park() in 5336// an appropriate loop. A litmus test for the correct 5337// usage of park is the following: if park() were modified 5338// to immediately return 0 your code should still work, 5339// albeit degenerating to a spin loop. 5340// 5341// An interesting optimization for park() is to use a trylock() 5342// to attempt to acquire the mutex. If the trylock() fails 5343// then we know that a concurrent unpark() operation is in-progress. 5344// in that case the park() code could simply set _count to 0 5345// and return immediately. The subsequent park() operation *might* 5346// return immediately. That's harmless as the caller of park() is 5347// expected to loop. By using trylock() we will have avoided a 5348// avoided a context switch caused by contention on the per-thread mutex. 5349// 5350// TODO-FIXME: 5351// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5352// objectmonitor implementation. 5353// 2. Collapse the JSR166 parker event, and the 5354// objectmonitor ParkEvent into a single "Event" construct. 5355// 3. In park() and unpark() add: 5356// assert (Thread::current() == AssociatedWith). 5357// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5358// 1-out-of-N park() operations will return immediately. 5359// 5360// _Event transitions in park() 5361// -1 => -1 : illegal 5362// 1 => 0 : pass - return immediately 5363// 0 => -1 : block 5364// 5365// _Event serves as a restricted-range semaphore. 5366// 5367// Another possible encoding of _Event would be with 5368// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5369// 5370// TODO-FIXME: add DTRACE probes for: 5371// 1. Tx parks 5372// 2. Ty unparks Tx 5373// 3. Tx resumes from park 5374 5375 5376// value determined through experimentation 5377#define ROUNDINGFIX 11 5378 5379// utility to compute the abstime argument to timedwait. 5380// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5381 5382static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5383 // millis is the relative timeout time 5384 // abstime will be the absolute timeout time 5385 if (millis < 0) millis = 0; 5386 struct timeval now; 5387 int status = gettimeofday(&now, NULL); 5388 assert(status == 0, "gettimeofday"); 5389 jlong seconds = millis / 1000; 5390 jlong max_wait_period; 5391 5392 if (UseLWPSynchronization) { 5393 // forward port of fix for 4275818 (not sleeping long enough) 5394 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5395 // _lwp_cond_timedwait() used a round_down algorithm rather 5396 // than a round_up. For millis less than our roundfactor 5397 // it rounded down to 0 which doesn't meet the spec. 5398 // For millis > roundfactor we may return a bit sooner, but 5399 // since we can not accurately identify the patch level and 5400 // this has already been fixed in Solaris 9 and 8 we will 5401 // leave it alone rather than always rounding down. 5402 5403 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5404 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5405 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5406 max_wait_period = 21000000; 5407 } else { 5408 max_wait_period = 50000000; 5409 } 5410 millis %= 1000; 5411 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5412 seconds = max_wait_period; 5413 } 5414 abstime->tv_sec = now.tv_sec + seconds; 5415 long usec = now.tv_usec + millis * 1000; 5416 if (usec >= 1000000) { 5417 abstime->tv_sec += 1; 5418 usec -= 1000000; 5419 } 5420 abstime->tv_nsec = usec * 1000; 5421 return abstime; 5422} 5423 5424// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5425// Conceptually TryPark() should be equivalent to park(0). 5426 5427int os::PlatformEvent::TryPark() { 5428 for (;;) { 5429 const int v = _Event ; 5430 guarantee ((v == 0) || (v == 1), "invariant") ; 5431 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5432 } 5433} 5434 5435void os::PlatformEvent::park() { // AKA: down() 5436 // Invariant: Only the thread associated with the Event/PlatformEvent 5437 // may call park(). 5438 int v ; 5439 for (;;) { 5440 v = _Event ; 5441 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5442 } 5443 guarantee (v >= 0, "invariant") ; 5444 if (v == 0) { 5445 // Do this the hard way by blocking ... 5446 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5447 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5448 // Only for SPARC >= V8PlusA 5449#if defined(__sparc) && defined(COMPILER2) 5450 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5451#endif 5452 int status = os::Solaris::mutex_lock(_mutex); 5453 assert_status(status == 0, status, "mutex_lock"); 5454 guarantee (_nParked == 0, "invariant") ; 5455 ++ _nParked ; 5456 while (_Event < 0) { 5457 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5458 // Treat this the same as if the wait was interrupted 5459 // With usr/lib/lwp going to kernel, always handle ETIME 5460 status = os::Solaris::cond_wait(_cond, _mutex); 5461 if (status == ETIME) status = EINTR ; 5462 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5463 } 5464 -- _nParked ; 5465 _Event = 0 ; 5466 status = os::Solaris::mutex_unlock(_mutex); 5467 assert_status(status == 0, status, "mutex_unlock"); 5468 } 5469} 5470 5471int os::PlatformEvent::park(jlong millis) { 5472 guarantee (_nParked == 0, "invariant") ; 5473 int v ; 5474 for (;;) { 5475 v = _Event ; 5476 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5477 } 5478 guarantee (v >= 0, "invariant") ; 5479 if (v != 0) return OS_OK ; 5480 5481 int ret = OS_TIMEOUT; 5482 timestruc_t abst; 5483 compute_abstime (&abst, millis); 5484 5485 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5486 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5487 // Only for SPARC >= V8PlusA 5488#if defined(__sparc) && defined(COMPILER2) 5489 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5490#endif 5491 int status = os::Solaris::mutex_lock(_mutex); 5492 assert_status(status == 0, status, "mutex_lock"); 5493 guarantee (_nParked == 0, "invariant") ; 5494 ++ _nParked ; 5495 while (_Event < 0) { 5496 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5497 assert_status(status == 0 || status == EINTR || 5498 status == ETIME || status == ETIMEDOUT, 5499 status, "cond_timedwait"); 5500 if (!FilterSpuriousWakeups) break ; // previous semantics 5501 if (status == ETIME || status == ETIMEDOUT) break ; 5502 // We consume and ignore EINTR and spurious wakeups. 5503 } 5504 -- _nParked ; 5505 if (_Event >= 0) ret = OS_OK ; 5506 _Event = 0 ; 5507 status = os::Solaris::mutex_unlock(_mutex); 5508 assert_status(status == 0, status, "mutex_unlock"); 5509 return ret; 5510} 5511 5512void os::PlatformEvent::unpark() { 5513 int v, AnyWaiters; 5514 5515 // Increment _Event. 5516 // Another acceptable implementation would be to simply swap 1 5517 // into _Event: 5518 // if (Swap (&_Event, 1) < 0) { 5519 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5520 // if (AnyWaiters) cond_signal (_cond) ; 5521 // } 5522 5523 for (;;) { 5524 v = _Event ; 5525 if (v > 0) { 5526 // The LD of _Event could have reordered or be satisfied 5527 // by a read-aside from this processor's write buffer. 5528 // To avoid problems execute a barrier and then 5529 // ratify the value. A degenerate CAS() would also work. 5530 // Viz., CAS (v+0, &_Event, v) == v). 5531 OrderAccess::fence() ; 5532 if (_Event == v) return ; 5533 continue ; 5534 } 5535 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5536 } 5537 5538 // If the thread associated with the event was parked, wake it. 5539 if (v < 0) { 5540 int status ; 5541 // Wait for the thread assoc with the PlatformEvent to vacate. 5542 status = os::Solaris::mutex_lock(_mutex); 5543 assert_status(status == 0, status, "mutex_lock"); 5544 AnyWaiters = _nParked ; 5545 status = os::Solaris::mutex_unlock(_mutex); 5546 assert_status(status == 0, status, "mutex_unlock"); 5547 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5548 if (AnyWaiters != 0) { 5549 // We intentional signal *after* dropping the lock 5550 // to avoid a common class of futile wakeups. 5551 status = os::Solaris::cond_signal(_cond); 5552 assert_status(status == 0, status, "cond_signal"); 5553 } 5554 } 5555} 5556 5557// JSR166 5558// ------------------------------------------------------- 5559 5560/* 5561 * The solaris and linux implementations of park/unpark are fairly 5562 * conservative for now, but can be improved. They currently use a 5563 * mutex/condvar pair, plus _counter. 5564 * Park decrements _counter if > 0, else does a condvar wait. Unpark 5565 * sets count to 1 and signals condvar. Only one thread ever waits 5566 * on the condvar. Contention seen when trying to park implies that someone 5567 * is unparking you, so don't wait. And spurious returns are fine, so there 5568 * is no need to track notifications. 5569 */ 5570 5571#define NANOSECS_PER_SEC 1000000000 5572#define NANOSECS_PER_MILLISEC 1000000 5573#define MAX_SECS 100000000 5574 5575/* 5576 * This code is common to linux and solaris and will be moved to a 5577 * common place in dolphin. 5578 * 5579 * The passed in time value is either a relative time in nanoseconds 5580 * or an absolute time in milliseconds. Either way it has to be unpacked 5581 * into suitable seconds and nanoseconds components and stored in the 5582 * given timespec structure. 5583 * Given time is a 64-bit value and the time_t used in the timespec is only 5584 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 5585 * overflow if times way in the future are given. Further on Solaris versions 5586 * prior to 10 there is a restriction (see cond_timedwait) that the specified 5587 * number of seconds, in abstime, is less than current_time + 100,000,000. 5588 * As it will be 28 years before "now + 100000000" will overflow we can 5589 * ignore overflow and just impose a hard-limit on seconds using the value 5590 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 5591 * years from "now". 5592 */ 5593static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5594 assert (time > 0, "convertTime"); 5595 5596 struct timeval now; 5597 int status = gettimeofday(&now, NULL); 5598 assert(status == 0, "gettimeofday"); 5599 5600 time_t max_secs = now.tv_sec + MAX_SECS; 5601 5602 if (isAbsolute) { 5603 jlong secs = time / 1000; 5604 if (secs > max_secs) { 5605 absTime->tv_sec = max_secs; 5606 } 5607 else { 5608 absTime->tv_sec = secs; 5609 } 5610 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5611 } 5612 else { 5613 jlong secs = time / NANOSECS_PER_SEC; 5614 if (secs >= MAX_SECS) { 5615 absTime->tv_sec = max_secs; 5616 absTime->tv_nsec = 0; 5617 } 5618 else { 5619 absTime->tv_sec = now.tv_sec + secs; 5620 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5621 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5622 absTime->tv_nsec -= NANOSECS_PER_SEC; 5623 ++absTime->tv_sec; // note: this must be <= max_secs 5624 } 5625 } 5626 } 5627 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5628 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5629 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5630 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5631} 5632 5633void Parker::park(bool isAbsolute, jlong time) { 5634 5635 // Optional fast-path check: 5636 // Return immediately if a permit is available. 5637 if (_counter > 0) { 5638 _counter = 0 ; 5639 return ; 5640 } 5641 5642 // Optional fast-exit: Check interrupt before trying to wait 5643 Thread* thread = Thread::current(); 5644 assert(thread->is_Java_thread(), "Must be JavaThread"); 5645 JavaThread *jt = (JavaThread *)thread; 5646 if (Thread::is_interrupted(thread, false)) { 5647 return; 5648 } 5649 5650 // First, demultiplex/decode time arguments 5651 timespec absTime; 5652 if (time < 0) { // don't wait at all 5653 return; 5654 } 5655 if (time > 0) { 5656 // Warning: this code might be exposed to the old Solaris time 5657 // round-down bugs. Grep "roundingFix" for details. 5658 unpackTime(&absTime, isAbsolute, time); 5659 } 5660 5661 // Enter safepoint region 5662 // Beware of deadlocks such as 6317397. 5663 // The per-thread Parker:: _mutex is a classic leaf-lock. 5664 // In particular a thread must never block on the Threads_lock while 5665 // holding the Parker:: mutex. If safepoints are pending both the 5666 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5667 ThreadBlockInVM tbivm(jt); 5668 5669 // Don't wait if cannot get lock since interference arises from 5670 // unblocking. Also. check interrupt before trying wait 5671 if (Thread::is_interrupted(thread, false) || 5672 os::Solaris::mutex_trylock(_mutex) != 0) { 5673 return; 5674 } 5675 5676 int status ; 5677 5678 if (_counter > 0) { // no wait needed 5679 _counter = 0; 5680 status = os::Solaris::mutex_unlock(_mutex); 5681 assert (status == 0, "invariant") ; 5682 return; 5683 } 5684 5685#ifdef ASSERT 5686 // Don't catch signals while blocked; let the running threads have the signals. 5687 // (This allows a debugger to break into the running thread.) 5688 sigset_t oldsigs; 5689 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5690 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5691#endif 5692 5693 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5694 jt->set_suspend_equivalent(); 5695 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5696 5697 // Do this the hard way by blocking ... 5698 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5699 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5700 // Only for SPARC >= V8PlusA 5701#if defined(__sparc) && defined(COMPILER2) 5702 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5703#endif 5704 5705 if (time == 0) { 5706 status = os::Solaris::cond_wait (_cond, _mutex) ; 5707 } else { 5708 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5709 } 5710 // Note that an untimed cond_wait() can sometimes return ETIME on older 5711 // versions of the Solaris. 5712 assert_status(status == 0 || status == EINTR || 5713 status == ETIME || status == ETIMEDOUT, 5714 status, "cond_timedwait"); 5715 5716#ifdef ASSERT 5717 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5718#endif 5719 _counter = 0 ; 5720 status = os::Solaris::mutex_unlock(_mutex); 5721 assert_status(status == 0, status, "mutex_unlock") ; 5722 5723 // If externally suspended while waiting, re-suspend 5724 if (jt->handle_special_suspend_equivalent_condition()) { 5725 jt->java_suspend_self(); 5726 } 5727 5728} 5729 5730void Parker::unpark() { 5731 int s, status ; 5732 status = os::Solaris::mutex_lock (_mutex) ; 5733 assert (status == 0, "invariant") ; 5734 s = _counter; 5735 _counter = 1; 5736 status = os::Solaris::mutex_unlock (_mutex) ; 5737 assert (status == 0, "invariant") ; 5738 5739 if (s < 1) { 5740 status = os::Solaris::cond_signal (_cond) ; 5741 assert (status == 0, "invariant") ; 5742 } 5743} 5744 5745extern char** environ; 5746 5747// Run the specified command in a separate process. Return its exit value, 5748// or -1 on failure (e.g. can't fork a new process). 5749// Unlike system(), this function can be called from signal handler. It 5750// doesn't block SIGINT et al. 5751int os::fork_and_exec(char* cmd) { 5752 char * argv[4]; 5753 argv[0] = (char *)"sh"; 5754 argv[1] = (char *)"-c"; 5755 argv[2] = cmd; 5756 argv[3] = NULL; 5757 5758 // fork is async-safe, fork1 is not so can't use in signal handler 5759 pid_t pid; 5760 Thread* t = ThreadLocalStorage::get_thread_slow(); 5761 if (t != NULL && t->is_inside_signal_handler()) { 5762 pid = fork(); 5763 } else { 5764 pid = fork1(); 5765 } 5766 5767 if (pid < 0) { 5768 // fork failed 5769 warning("fork failed: %s", strerror(errno)); 5770 return -1; 5771 5772 } else if (pid == 0) { 5773 // child process 5774 5775 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5776 execve("/usr/bin/sh", argv, environ); 5777 5778 // execve failed 5779 _exit(-1); 5780 5781 } else { 5782 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5783 // care about the actual exit code, for now. 5784 5785 int status; 5786 5787 // Wait for the child process to exit. This returns immediately if 5788 // the child has already exited. */ 5789 while (waitpid(pid, &status, 0) < 0) { 5790 switch (errno) { 5791 case ECHILD: return 0; 5792 case EINTR: break; 5793 default: return -1; 5794 } 5795 } 5796 5797 if (WIFEXITED(status)) { 5798 // The child exited normally; get its exit code. 5799 return WEXITSTATUS(status); 5800 } else if (WIFSIGNALED(status)) { 5801 // The child exited because of a signal 5802 // The best value to return is 0x80 + signal number, 5803 // because that is what all Unix shells do, and because 5804 // it allows callers to distinguish between process exit and 5805 // process death by signal. 5806 return 0x80 + WTERMSIG(status); 5807 } else { 5808 // Unknown exit code; pass it through 5809 return status; 5810 } 5811 } 5812} 5813