os_solaris.cpp revision 405:2649e5276dd7
1209371Smav/* 2247463Smav * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. 3209371Smav * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4209371Smav * 5209371Smav * This code is free software; you can redistribute it and/or modify it 6209371Smav * under the terms of the GNU General Public License version 2 only, as 7209371Smav * published by the Free Software Foundation. 8209371Smav * 9209371Smav * This code is distributed in the hope that it will be useful, but WITHOUT 10209371Smav * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11209371Smav * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12209371Smav * version 2 for more details (a copy is included in the LICENSE file that 13209371Smav * accompanied this code). 14209371Smav * 15209371Smav * You should have received a copy of the GNU General Public License version 16209371Smav * 2 along with this work; if not, write to the Free Software Foundation, 17209371Smav * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18209371Smav * 19209371Smav * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20209371Smav * CA 95054 USA or visit www.sun.com if you need additional information or 21209371Smav * have any questions. 22209371Smav * 23209371Smav */ 24209371Smav 25209371Smav// do not include precompiled header file 26209371Smav# include "incls/_os_solaris.cpp.incl" 27209371Smav 28209371Smav// put OS-includes here 29209371Smav# include <dlfcn.h> 30209371Smav# include <errno.h> 31209371Smav# include <link.h> 32209371Smav# include <poll.h> 33209371Smav# include <pthread.h> 34209371Smav# include <pwd.h> 35209371Smav# include <schedctl.h> 36209371Smav# include <setjmp.h> 37266347Sian# include <signal.h> 38266347Sian# include <stdio.h> 39209371Smav# include <alloca.h> 40209371Smav# include <sys/filio.h> 41209371Smav# include <sys/ipc.h> 42209371Smav# include <sys/lwp.h> 43212541Smav# include <sys/machelf.h> // for elf Sym structure used by dladdr1 44209371Smav# include <sys/mman.h> 45209371Smav# include <sys/processor.h> 46227309Sed# include <sys/procset.h> 47209371Smav# include <sys/pset.h> 48209371Smav# include <sys/resource.h> 49209371Smav# include <sys/shm.h> 50209371Smav# include <sys/socket.h> 51209371Smav# include <sys/stat.h> 52209371Smav# include <sys/systeminfo.h> 53209371Smav# include <sys/time.h> 54209371Smav# include <sys/times.h> 55209371Smav# include <sys/types.h> 56209371Smav# include <sys/wait.h> 57212479Smav# include <sys/utsname.h> 58212479Smav# include <thread.h> 59212479Smav# include <unistd.h> 60212479Smav# include <sys/priocntl.h> 61212479Smav# include <sys/rtpriocntl.h> 62212479Smav# include <sys/tspriocntl.h> 63212479Smav# include <sys/iapriocntl.h> 64212479Smav# include <sys/loadavg.h> 65212479Smav# include <string.h> 66209371Smav 67247463Smav# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 68209371Smav# include <sys/procfs.h> // see comment in <sys/procfs.h> 69209371Smav 70209371Smav#define MAX_PATH (2 * K) 71217326Smdf 72209371Smav// for timer info max values which include all bits 73209371Smav#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 74217326Smdf 75210346Smav#ifdef _GNU_SOURCE 76209371Smav// See bug #6514594 77209371Smavextern "C" int madvise(caddr_t, size_t, int); 78209371Smavextern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 79209371Smav int attr, int mask); 80209371Smav#endif //_GNU_SOURCE 81209371Smav 82209371Smav/* 83209371Smav MPSS Changes Start. 84209371Smav The JVM binary needs to be built and run on pre-Solaris 9 85209371Smav systems, but the constants needed by MPSS are only in Solaris 9 86209371Smav header files. They are textually replicated here to allow 87209371Smav building on earlier systems. Once building on Solaris 8 is 88209371Smav no longer a requirement, these #defines can be replaced by ordinary 89209371Smav system .h inclusion. 90209371Smav 91209371Smav In earlier versions of the JDK and Solaris, we used ISM for large pages. 92209371Smav But ISM requires shared memory to achieve this and thus has many caveats. 93209371Smav MPSS is a fully transparent and is a cleaner way to get large pages. 94209371Smav Although we still require keeping ISM for backward compatiblitiy as well as 95209371Smav giving the opportunity to use large pages on older systems it is 96209371Smav recommended that MPSS be used for Solaris 9 and above. 97209371Smav 98209371Smav*/ 99209371Smav 100209371Smav#ifndef MC_HAT_ADVISE 101209371Smav 102209371Smavstruct memcntl_mha { 103209371Smav uint_t mha_cmd; /* command(s) */ 104209371Smav uint_t mha_flags; 105209371Smav size_t mha_pagesize; 106209371Smav}; 107209371Smav#define MC_HAT_ADVISE 7 /* advise hat map size */ 108209371Smav#define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 109209371Smav#define MAP_ALIGN 0x200 /* addr specifies alignment */ 110209371Smav 111209371Smav#endif 112209371Smav// MPSS Changes End. 113209371Smav 114209371Smav 115209371Smav// Here are some liblgrp types from sys/lgrp_user.h to be able to 116209371Smav// compile on older systems without this header file. 117209371Smav 118266347Sian#ifndef MADV_ACCESS_LWP 119266347Sian# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 120266347Sian#endif 121266347Sian#ifndef MADV_ACCESS_MANY 122266347Sian# define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 123266347Sian#endif 124266347Sian 125266347Sian#ifndef LGRP_RSRC_CPU 126266347Sian# define LGRP_RSRC_CPU 0 /* CPU resources */ 127266347Sian#endif 128266347Sian#ifndef LGRP_RSRC_MEM 129266347Sian# define LGRP_RSRC_MEM 1 /* memory resources */ 130266347Sian#endif 131266347Sian 132209371Smav// Some more macros from sys/mman.h that are not present in Solaris 8. 133209371Smav 134209371Smav#ifndef MAX_MEMINFO_CNT 135209371Smav/* 136209371Smav * info_req request type definitions for meminfo 137209371Smav * request types starting with MEMINFO_V are used for Virtual addresses 138209371Smav * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 139209371Smav * addresses 140209371Smav */ 141209371Smav# define MEMINFO_SHIFT 16 142209371Smav# define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 143209371Smav# define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 144209371Smav# define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 145209371Smav# define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 146209371Smav# define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 147209371Smav# define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 148209371Smav# define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 149209371Smav# define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 150209371Smav 151209371Smav/* maximum number of addresses meminfo() can process at a time */ 152209371Smav# define MAX_MEMINFO_CNT 256 153209371Smav 154209371Smav/* maximum number of request types */ 155209371Smav# define MAX_MEMINFO_REQ 31 156209371Smav#endif 157209371Smav 158209371Smav// see thr_setprio(3T) for the basis of these numbers 159209371Smav#define MinimumPriority 0 160209371Smav#define NormalPriority 64 161209371Smav#define MaximumPriority 127 162209371Smav 163209371Smav// Values for ThreadPriorityPolicy == 1 164209371Smavint prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64, 165209371Smav 80, 96, 112, 124, 127 }; 166209371Smav 167209371Smav// System parameters used internally 168209371Smavstatic clock_t clock_tics_per_sec = 100; 169209371Smav 170209371Smav// For diagnostics to print a message once. see run_periodic_checks 171209371Smavstatic bool check_addr0_done = false; 172209371Smavstatic sigset_t check_signal_done; 173209371Smavstatic bool check_signals = true; 174209371Smav 175209371Smavaddress os::Solaris::handler_start; // start pc of thr_sighndlrinfo 176209371Smavaddress os::Solaris::handler_end; // end pc of thr_sighndlrinfo 177209371Smav 178209371Smavaddress os::Solaris::_main_stack_base = NULL; // 4352906 workaround 179247463Smav 180209371Smav 181209371Smav// "default" initializers for missing libc APIs 182209371Smavextern "C" { 183209371Smav static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 184247463Smav static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 185247463Smav 186247463Smav static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 187248230Smav static int lwp_cond_destroy(cond_t *cv) { return 0; } 188247463Smav} 189247463Smav 190247463Smav// "default" initializers for pthread-based synchronization 191247463Smavextern "C" { 192247463Smav static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 193247463Smav static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 194210290Smav} 195247463Smav 196247463Smav// Thread Local Storage 197247463Smav// This is common to all Solaris platforms so it is defined here, 198247463Smav// in this common file. 199247463Smav// The declarations are in the os_cpu threadLS*.hpp files. 200210290Smav// 201247463Smav// Static member initialization for TLS 202209371SmavThread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 203209371Smav 204209371Smav#ifndef PRODUCT 205209371Smav#define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 206209371Smav 207209371Smavint ThreadLocalStorage::_tcacheHit = 0; 208209371Smavint ThreadLocalStorage::_tcacheMiss = 0; 209209371Smav 210209371Smavvoid ThreadLocalStorage::print_statistics() { 211209371Smav int total = _tcacheMiss+_tcacheHit; 212209371Smav tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 213209371Smav _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 214209371Smav} 215209371Smav#undef _PCT 216209371Smav#endif // PRODUCT 217209371Smav 218209371SmavThread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 219209371Smav int index) { 220209371Smav Thread *thread = get_thread_slow(); 221209371Smav if (thread != NULL) { 222209371Smav address sp = os::current_stack_pointer(); 223209371Smav guarantee(thread->_stack_base == NULL || 224209371Smav (sp <= thread->_stack_base && 225209371Smav sp >= thread->_stack_base - thread->_stack_size) || 226209371Smav is_error_reported(), 227209371Smav "sp must be inside of selected thread stack"); 228209371Smav 229209371Smav thread->_self_raw_id = raw_id; // mark for quick retrieval 230209371Smav _get_thread_cache[ index ] = thread; 231209371Smav } 232209371Smav return thread; 233209371Smav} 234209371Smav 235209371Smav 236209371Smavstatic const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 237209371Smav#define NO_CACHED_THREAD ((Thread*)all_zero) 238209371Smav 239209371Smavvoid ThreadLocalStorage::pd_set_thread(Thread* thread) { 240209371Smav 241209371Smav // Store the new value before updating the cache to prevent a race 242209371Smav // between get_thread_via_cache_slowly() and this store operation. 243209371Smav os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 244209371Smav 245209371Smav // Update thread cache with new thread if setting on thread create, 246209371Smav // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 247212223Smav uintptr_t raw = pd_raw_thread_id(); 248209371Smav int ix = pd_cache_index(raw); 249209371Smav _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 250209371Smav} 251209371Smav 252209371Smavvoid ThreadLocalStorage::pd_init() { 253209371Smav for (int i = 0; i < _pd_cache_size; i++) { 254209371Smav _get_thread_cache[i] = NO_CACHED_THREAD; 255209371Smav } 256209371Smav} 257209371Smav 258209371Smav// Invalidate all the caches (happens to be the same as pd_init). 259209371Smavvoid ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 260209371Smav 261209371Smav#undef NO_CACHED_THREAD 262209371Smav 263// END Thread Local Storage 264 265static inline size_t adjust_stack_size(address base, size_t size) { 266 if ((ssize_t)size < 0) { 267 // 4759953: Compensate for ridiculous stack size. 268 size = max_intx; 269 } 270 if (size > (size_t)base) { 271 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 272 size = (size_t)base; 273 } 274 return size; 275} 276 277static inline stack_t get_stack_info() { 278 stack_t st; 279 int retval = thr_stksegment(&st); 280 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 281 assert(retval == 0, "incorrect return value from thr_stksegment"); 282 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 283 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 284 return st; 285} 286 287address os::current_stack_base() { 288 int r = thr_main() ; 289 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 290 bool is_primordial_thread = r; 291 292 // Workaround 4352906, avoid calls to thr_stksegment by 293 // thr_main after the first one (it looks like we trash 294 // some data, causing the value for ss_sp to be incorrect). 295 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 296 stack_t st = get_stack_info(); 297 if (is_primordial_thread) { 298 // cache initial value of stack base 299 os::Solaris::_main_stack_base = (address)st.ss_sp; 300 } 301 return (address)st.ss_sp; 302 } else { 303 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 304 return os::Solaris::_main_stack_base; 305 } 306} 307 308size_t os::current_stack_size() { 309 size_t size; 310 311 int r = thr_main() ; 312 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 313 if(!r) { 314 size = get_stack_info().ss_size; 315 } else { 316 struct rlimit limits; 317 getrlimit(RLIMIT_STACK, &limits); 318 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 319 } 320 // base may not be page aligned 321 address base = current_stack_base(); 322 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 323 return (size_t)(base - bottom); 324} 325 326// interruptible infrastructure 327 328// setup_interruptible saves the thread state before going into an 329// interruptible system call. 330// The saved state is used to restore the thread to 331// its former state whether or not an interrupt is received. 332// Used by classloader os::read 333// hpi calls skip this layer and stay in _thread_in_native 334 335void os::Solaris::setup_interruptible(JavaThread* thread) { 336 337 JavaThreadState thread_state = thread->thread_state(); 338 339 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 340 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 341 OSThread* osthread = thread->osthread(); 342 osthread->set_saved_interrupt_thread_state(thread_state); 343 thread->frame_anchor()->make_walkable(thread); 344 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 345} 346 347// Version of setup_interruptible() for threads that are already in 348// _thread_blocked. Used by os_sleep(). 349void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 350 thread->frame_anchor()->make_walkable(thread); 351} 352 353JavaThread* os::Solaris::setup_interruptible() { 354 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 355 setup_interruptible(thread); 356 return thread; 357} 358 359void os::Solaris::try_enable_extended_io() { 360 typedef int (*enable_extended_FILE_stdio_t)(int, int); 361 362 if (!UseExtendedFileIO) { 363 return; 364 } 365 366 enable_extended_FILE_stdio_t enabler = 367 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 368 "enable_extended_FILE_stdio"); 369 if (enabler) { 370 enabler(-1, -1); 371 } 372} 373 374 375#ifdef ASSERT 376 377JavaThread* os::Solaris::setup_interruptible_native() { 378 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 379 JavaThreadState thread_state = thread->thread_state(); 380 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 381 return thread; 382} 383 384void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 385 JavaThreadState thread_state = thread->thread_state(); 386 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 387} 388#endif 389 390// cleanup_interruptible reverses the effects of setup_interruptible 391// setup_interruptible_already_blocked() does not need any cleanup. 392 393void os::Solaris::cleanup_interruptible(JavaThread* thread) { 394 OSThread* osthread = thread->osthread(); 395 396 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 397} 398 399// I/O interruption related counters called in _INTERRUPTIBLE 400 401void os::Solaris::bump_interrupted_before_count() { 402 RuntimeService::record_interrupted_before_count(); 403} 404 405void os::Solaris::bump_interrupted_during_count() { 406 RuntimeService::record_interrupted_during_count(); 407} 408 409static int _processors_online = 0; 410 411 jint os::Solaris::_os_thread_limit = 0; 412volatile jint os::Solaris::_os_thread_count = 0; 413 414julong os::available_memory() { 415 return Solaris::available_memory(); 416} 417 418julong os::Solaris::available_memory() { 419 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 420} 421 422julong os::Solaris::_physical_memory = 0; 423 424julong os::physical_memory() { 425 return Solaris::physical_memory(); 426} 427 428julong os::allocatable_physical_memory(julong size) { 429#ifdef _LP64 430 return size; 431#else 432 julong result = MIN2(size, (julong)3835*M); 433 if (!is_allocatable(result)) { 434 // Memory allocations will be aligned but the alignment 435 // is not known at this point. Alignments will 436 // be at most to LargePageSizeInBytes. Protect 437 // allocations from alignments up to illegal 438 // values. If at this point 2G is illegal. 439 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 440 result = MIN2(size, reasonable_size); 441 } 442 return result; 443#endif 444} 445 446static hrtime_t first_hrtime = 0; 447static const hrtime_t hrtime_hz = 1000*1000*1000; 448const int LOCK_BUSY = 1; 449const int LOCK_FREE = 0; 450const int LOCK_INVALID = -1; 451static volatile hrtime_t max_hrtime = 0; 452static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 453 454 455void os::Solaris::initialize_system_info() { 456 _processor_count = sysconf(_SC_NPROCESSORS_CONF); 457 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 458 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 459} 460 461int os::active_processor_count() { 462 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 463 pid_t pid = getpid(); 464 psetid_t pset = PS_NONE; 465 // Are we running in a processor set? 466 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 467 if (pset != PS_NONE) { 468 uint_t pset_cpus; 469 // Query number of cpus in processor set 470 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 471 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 472 _processors_online = pset_cpus; 473 return pset_cpus; 474 } 475 } 476 } 477 // Otherwise return number of online cpus 478 return online_cpus; 479} 480 481static bool find_processors_in_pset(psetid_t pset, 482 processorid_t** id_array, 483 uint_t* id_length) { 484 bool result = false; 485 // Find the number of processors in the processor set. 486 if (pset_info(pset, NULL, id_length, NULL) == 0) { 487 // Make up an array to hold their ids. 488 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 489 // Fill in the array with their processor ids. 490 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 491 result = true; 492 } 493 } 494 return result; 495} 496 497// Callers of find_processors_online() must tolerate imprecise results -- 498// the system configuration can change asynchronously because of DR 499// or explicit psradm operations. 500// 501// We also need to take care that the loop (below) terminates as the 502// number of processors online can change between the _SC_NPROCESSORS_ONLN 503// request and the loop that builds the list of processor ids. Unfortunately 504// there's no reliable way to determine the maximum valid processor id, 505// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 506// man pages, which claim the processor id set is "sparse, but 507// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 508// exit the loop. 509// 510// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 511// not available on S8.0. 512 513static bool find_processors_online(processorid_t** id_array, 514 uint* id_length) { 515 const processorid_t MAX_PROCESSOR_ID = 100000 ; 516 // Find the number of processors online. 517 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 518 // Make up an array to hold their ids. 519 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 520 // Processors need not be numbered consecutively. 521 long found = 0; 522 processorid_t next = 0; 523 while (found < *id_length && next < MAX_PROCESSOR_ID) { 524 processor_info_t info; 525 if (processor_info(next, &info) == 0) { 526 // NB, PI_NOINTR processors are effectively online ... 527 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 528 (*id_array)[found] = next; 529 found += 1; 530 } 531 } 532 next += 1; 533 } 534 if (found < *id_length) { 535 // The loop above didn't identify the expected number of processors. 536 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 537 // and re-running the loop, above, but there's no guarantee of progress 538 // if the system configuration is in flux. Instead, we just return what 539 // we've got. Note that in the worst case find_processors_online() could 540 // return an empty set. (As a fall-back in the case of the empty set we 541 // could just return the ID of the current processor). 542 *id_length = found ; 543 } 544 545 return true; 546} 547 548static bool assign_distribution(processorid_t* id_array, 549 uint id_length, 550 uint* distribution, 551 uint distribution_length) { 552 // We assume we can assign processorid_t's to uint's. 553 assert(sizeof(processorid_t) == sizeof(uint), 554 "can't convert processorid_t to uint"); 555 // Quick check to see if we won't succeed. 556 if (id_length < distribution_length) { 557 return false; 558 } 559 // Assign processor ids to the distribution. 560 // Try to shuffle processors to distribute work across boards, 561 // assuming 4 processors per board. 562 const uint processors_per_board = ProcessDistributionStride; 563 // Find the maximum processor id. 564 processorid_t max_id = 0; 565 for (uint m = 0; m < id_length; m += 1) { 566 max_id = MAX2(max_id, id_array[m]); 567 } 568 // The next id, to limit loops. 569 const processorid_t limit_id = max_id + 1; 570 // Make up markers for available processors. 571 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); 572 for (uint c = 0; c < limit_id; c += 1) { 573 available_id[c] = false; 574 } 575 for (uint a = 0; a < id_length; a += 1) { 576 available_id[id_array[a]] = true; 577 } 578 // Step by "boards", then by "slot", copying to "assigned". 579 // NEEDS_CLEANUP: The assignment of processors should be stateful, 580 // remembering which processors have been assigned by 581 // previous calls, etc., so as to distribute several 582 // independent calls of this method. What we'd like is 583 // It would be nice to have an API that let us ask 584 // how many processes are bound to a processor, 585 // but we don't have that, either. 586 // In the short term, "board" is static so that 587 // subsequent distributions don't all start at board 0. 588 static uint board = 0; 589 uint assigned = 0; 590 // Until we've found enough processors .... 591 while (assigned < distribution_length) { 592 // ... find the next available processor in the board. 593 for (uint slot = 0; slot < processors_per_board; slot += 1) { 594 uint try_id = board * processors_per_board + slot; 595 if ((try_id < limit_id) && (available_id[try_id] == true)) { 596 distribution[assigned] = try_id; 597 available_id[try_id] = false; 598 assigned += 1; 599 break; 600 } 601 } 602 board += 1; 603 if (board * processors_per_board + 0 >= limit_id) { 604 board = 0; 605 } 606 } 607 if (available_id != NULL) { 608 FREE_C_HEAP_ARRAY(bool, available_id); 609 } 610 return true; 611} 612 613bool os::distribute_processes(uint length, uint* distribution) { 614 bool result = false; 615 // Find the processor id's of all the available CPUs. 616 processorid_t* id_array = NULL; 617 uint id_length = 0; 618 // There are some races between querying information and using it, 619 // since processor sets can change dynamically. 620 psetid_t pset = PS_NONE; 621 // Are we running in a processor set? 622 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 623 result = find_processors_in_pset(pset, &id_array, &id_length); 624 } else { 625 result = find_processors_online(&id_array, &id_length); 626 } 627 if (result == true) { 628 if (id_length >= length) { 629 result = assign_distribution(id_array, id_length, distribution, length); 630 } else { 631 result = false; 632 } 633 } 634 if (id_array != NULL) { 635 FREE_C_HEAP_ARRAY(processorid_t, id_array); 636 } 637 return result; 638} 639 640bool os::bind_to_processor(uint processor_id) { 641 // We assume that a processorid_t can be stored in a uint. 642 assert(sizeof(uint) == sizeof(processorid_t), 643 "can't convert uint to processorid_t"); 644 int bind_result = 645 processor_bind(P_LWPID, // bind LWP. 646 P_MYID, // bind current LWP. 647 (processorid_t) processor_id, // id. 648 NULL); // don't return old binding. 649 return (bind_result == 0); 650} 651 652bool os::getenv(const char* name, char* buffer, int len) { 653 char* val = ::getenv( name ); 654 if ( val == NULL 655 || strlen(val) + 1 > len ) { 656 if (len > 0) buffer[0] = 0; // return a null string 657 return false; 658 } 659 strcpy( buffer, val ); 660 return true; 661} 662 663 664// Return true if user is running as root. 665 666bool os::have_special_privileges() { 667 static bool init = false; 668 static bool privileges = false; 669 if (!init) { 670 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 671 init = true; 672 } 673 return privileges; 674} 675 676 677static char* get_property(char* name, char* buffer, int buffer_size) { 678 if (os::getenv(name, buffer, buffer_size)) { 679 return buffer; 680 } 681 static char empty[] = ""; 682 return empty; 683} 684 685 686void os::init_system_properties_values() { 687 char arch[12]; 688 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 689 690 // The next steps are taken in the product version: 691 // 692 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 693 // This library should be located at: 694 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 695 // 696 // If "/jre/lib/" appears at the right place in the path, then we 697 // assume libjvm[_g].so is installed in a JDK and we use this path. 698 // 699 // Otherwise exit with message: "Could not create the Java virtual machine." 700 // 701 // The following extra steps are taken in the debugging version: 702 // 703 // If "/jre/lib/" does NOT appear at the right place in the path 704 // instead of exit check for $JAVA_HOME environment variable. 705 // 706 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 707 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 708 // it looks like libjvm[_g].so is installed there 709 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 710 // 711 // Otherwise exit. 712 // 713 // Important note: if the location of libjvm.so changes this 714 // code needs to be changed accordingly. 715 716 // The next few definitions allow the code to be verbatim: 717#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) 718#define free(p) FREE_C_HEAP_ARRAY(char, p) 719#define getenv(n) ::getenv(n) 720 721#define EXTENSIONS_DIR "/lib/ext" 722#define ENDORSED_DIR "/lib/endorsed" 723#define COMMON_DIR "/usr/jdk/packages" 724 725 { 726 /* sysclasspath, java_home, dll_dir */ 727 { 728 char *home_path; 729 char *dll_path; 730 char *pslash; 731 char buf[MAXPATHLEN]; 732 os::jvm_path(buf, sizeof(buf)); 733 734 // Found the full path to libjvm.so. 735 // Now cut the path to <java_home>/jre if we can. 736 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 737 pslash = strrchr(buf, '/'); 738 if (pslash != NULL) 739 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 740 dll_path = malloc(strlen(buf) + 1); 741 if (dll_path == NULL) 742 return; 743 strcpy(dll_path, buf); 744 Arguments::set_dll_dir(dll_path); 745 746 if (pslash != NULL) { 747 pslash = strrchr(buf, '/'); 748 if (pslash != NULL) { 749 *pslash = '\0'; /* get rid of /<arch> */ 750 pslash = strrchr(buf, '/'); 751 if (pslash != NULL) 752 *pslash = '\0'; /* get rid of /lib */ 753 } 754 } 755 756 home_path = malloc(strlen(buf) + 1); 757 if (home_path == NULL) 758 return; 759 strcpy(home_path, buf); 760 Arguments::set_java_home(home_path); 761 762 if (!set_boot_path('/', ':')) 763 return; 764 } 765 766 /* 767 * Where to look for native libraries 768 */ 769 { 770 // Use dlinfo() to determine the correct java.library.path. 771 // 772 // If we're launched by the Java launcher, and the user 773 // does not set java.library.path explicitly on the commandline, 774 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 775 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 776 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 777 // /usr/lib), which is exactly what we want. 778 // 779 // If the user does set java.library.path, it completely 780 // overwrites this setting, and always has. 781 // 782 // If we're not launched by the Java launcher, we may 783 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 784 // settings. Again, dlinfo does exactly what we want. 785 786 Dl_serinfo _info, *info = &_info; 787 Dl_serpath *path; 788 char* library_path; 789 char *common_path; 790 int i; 791 792 // determine search path count and required buffer size 793 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 794 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 795 } 796 797 // allocate new buffer and initialize 798 info = (Dl_serinfo*)malloc(_info.dls_size); 799 if (info == NULL) { 800 vm_exit_out_of_memory(_info.dls_size, 801 "init_system_properties_values info"); 802 } 803 info->dls_size = _info.dls_size; 804 info->dls_cnt = _info.dls_cnt; 805 806 // obtain search path information 807 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 808 free(info); 809 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 810 } 811 812 path = &info->dls_serpath[0]; 813 814 // Note: Due to a legacy implementation, most of the library path 815 // is set in the launcher. This was to accomodate linking restrictions 816 // on legacy Solaris implementations (which are no longer supported). 817 // Eventually, all the library path setting will be done here. 818 // 819 // However, to prevent the proliferation of improperly built native 820 // libraries, the new path component /usr/jdk/packages is added here. 821 822 // Determine the actual CPU architecture. 823 char cpu_arch[12]; 824 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 825#ifdef _LP64 826 // If we are a 64-bit vm, perform the following translations: 827 // sparc -> sparcv9 828 // i386 -> amd64 829 if (strcmp(cpu_arch, "sparc") == 0) 830 strcat(cpu_arch, "v9"); 831 else if (strcmp(cpu_arch, "i386") == 0) 832 strcpy(cpu_arch, "amd64"); 833#endif 834 835 // Construct the invariant part of ld_library_path. Note that the 836 // space for the colon and the trailing null are provided by the 837 // nulls included by the sizeof operator. 838 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 839 common_path = malloc(bufsize); 840 if (common_path == NULL) { 841 free(info); 842 vm_exit_out_of_memory(bufsize, 843 "init_system_properties_values common_path"); 844 } 845 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 846 847 // struct size is more than sufficient for the path components obtained 848 // through the dlinfo() call, so only add additional space for the path 849 // components explicitly added here. 850 bufsize = info->dls_size + strlen(common_path); 851 library_path = malloc(bufsize); 852 if (library_path == NULL) { 853 free(info); 854 free(common_path); 855 vm_exit_out_of_memory(bufsize, 856 "init_system_properties_values library_path"); 857 } 858 library_path[0] = '\0'; 859 860 // Construct the desired Java library path from the linker's library 861 // search path. 862 // 863 // For compatibility, it is optimal that we insert the additional path 864 // components specific to the Java VM after those components specified 865 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 866 // infrastructure. 867 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 868 strcpy(library_path, common_path); 869 } else { 870 int inserted = 0; 871 for (i = 0; i < info->dls_cnt; i++, path++) { 872 uint_t flags = path->dls_flags & LA_SER_MASK; 873 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 874 strcat(library_path, common_path); 875 strcat(library_path, os::path_separator()); 876 inserted = 1; 877 } 878 strcat(library_path, path->dls_name); 879 strcat(library_path, os::path_separator()); 880 } 881 // eliminate trailing path separator 882 library_path[strlen(library_path)-1] = '\0'; 883 } 884 885 // happens before argument parsing - can't use a trace flag 886 // tty->print_raw("init_system_properties_values: native lib path: "); 887 // tty->print_raw_cr(library_path); 888 889 // callee copies into its own buffer 890 Arguments::set_library_path(library_path); 891 892 free(common_path); 893 free(library_path); 894 free(info); 895 } 896 897 /* 898 * Extensions directories. 899 * 900 * Note that the space for the colon and the trailing null are provided 901 * by the nulls included by the sizeof operator (so actually one byte more 902 * than necessary is allocated). 903 */ 904 { 905 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 906 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 907 sizeof(EXTENSIONS_DIR)); 908 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 909 Arguments::get_java_home()); 910 Arguments::set_ext_dirs(buf); 911 } 912 913 /* Endorsed standards default directory. */ 914 { 915 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 916 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 917 Arguments::set_endorsed_dirs(buf); 918 } 919 } 920 921#undef malloc 922#undef free 923#undef getenv 924#undef EXTENSIONS_DIR 925#undef ENDORSED_DIR 926#undef COMMON_DIR 927 928} 929 930void os::breakpoint() { 931 BREAKPOINT; 932} 933 934bool os::obsolete_option(const JavaVMOption *option) 935{ 936 if (!strncmp(option->optionString, "-Xt", 3)) { 937 return true; 938 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 939 return true; 940 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 941 return true; 942 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 943 return true; 944 } 945 return false; 946} 947 948bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 949 address stackStart = (address)thread->stack_base(); 950 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 951 if (sp < stackStart && sp >= stackEnd ) return true; 952 return false; 953} 954 955extern "C" void breakpoint() { 956 // use debugger to set breakpoint here 957} 958 959// Returns an estimate of the current stack pointer. Result must be guaranteed to 960// point into the calling threads stack, and be no lower than the current stack 961// pointer. 962address os::current_stack_pointer() { 963 volatile int dummy; 964 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 965 return sp; 966} 967 968static thread_t main_thread; 969 970// Thread start routine for all new Java threads 971extern "C" void* java_start(void* thread_addr) { 972 // Try to randomize the cache line index of hot stack frames. 973 // This helps when threads of the same stack traces evict each other's 974 // cache lines. The threads can be either from the same JVM instance, or 975 // from different JVM instances. The benefit is especially true for 976 // processors with hyperthreading technology. 977 static int counter = 0; 978 int pid = os::current_process_id(); 979 alloca(((pid ^ counter++) & 7) * 128); 980 981 int prio; 982 Thread* thread = (Thread*)thread_addr; 983 OSThread* osthr = thread->osthread(); 984 985 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 986 thread->_schedctl = (void *) schedctl_init () ; 987 988 if (UseNUMA) { 989 int lgrp_id = os::numa_get_group_id(); 990 if (lgrp_id != -1) { 991 thread->set_lgrp_id(lgrp_id); 992 } 993 } 994 995 // If the creator called set priority before we started, 996 // we need to call set priority now that we have an lwp. 997 // Get the priority from libthread and set the priority 998 // for the new Solaris lwp. 999 if ( osthr->thread_id() != -1 ) { 1000 if ( UseThreadPriorities ) { 1001 thr_getprio(osthr->thread_id(), &prio); 1002 if (ThreadPriorityVerbose) { 1003 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", 1004 osthr->thread_id(), osthr->lwp_id(), prio ); 1005 } 1006 os::set_native_priority(thread, prio); 1007 } 1008 } else if (ThreadPriorityVerbose) { 1009 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1010 } 1011 1012 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1013 1014 // initialize signal mask for this thread 1015 os::Solaris::hotspot_sigmask(thread); 1016 1017 thread->run(); 1018 1019 // One less thread is executing 1020 // When the VMThread gets here, the main thread may have already exited 1021 // which frees the CodeHeap containing the Atomic::dec code 1022 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1023 Atomic::dec(&os::Solaris::_os_thread_count); 1024 } 1025 1026 if (UseDetachedThreads) { 1027 thr_exit(NULL); 1028 ShouldNotReachHere(); 1029 } 1030 return NULL; 1031} 1032 1033static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1034 // Allocate the OSThread object 1035 OSThread* osthread = new OSThread(NULL, NULL); 1036 if (osthread == NULL) return NULL; 1037 1038 // Store info on the Solaris thread into the OSThread 1039 osthread->set_thread_id(thread_id); 1040 osthread->set_lwp_id(_lwp_self()); 1041 thread->_schedctl = (void *) schedctl_init () ; 1042 1043 if (UseNUMA) { 1044 int lgrp_id = os::numa_get_group_id(); 1045 if (lgrp_id != -1) { 1046 thread->set_lgrp_id(lgrp_id); 1047 } 1048 } 1049 1050 if ( ThreadPriorityVerbose ) { 1051 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1052 osthread->thread_id(), osthread->lwp_id() ); 1053 } 1054 1055 // Initial thread state is INITIALIZED, not SUSPENDED 1056 osthread->set_state(INITIALIZED); 1057 1058 return osthread; 1059} 1060 1061void os::Solaris::hotspot_sigmask(Thread* thread) { 1062 1063 //Save caller's signal mask 1064 sigset_t sigmask; 1065 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1066 OSThread *osthread = thread->osthread(); 1067 osthread->set_caller_sigmask(sigmask); 1068 1069 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1070 if (!ReduceSignalUsage) { 1071 if (thread->is_VM_thread()) { 1072 // Only the VM thread handles BREAK_SIGNAL ... 1073 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1074 } else { 1075 // ... all other threads block BREAK_SIGNAL 1076 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1077 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1078 } 1079 } 1080} 1081 1082bool os::create_attached_thread(JavaThread* thread) { 1083#ifdef ASSERT 1084 thread->verify_not_published(); 1085#endif 1086 OSThread* osthread = create_os_thread(thread, thr_self()); 1087 if (osthread == NULL) { 1088 return false; 1089 } 1090 1091 // Initial thread state is RUNNABLE 1092 osthread->set_state(RUNNABLE); 1093 thread->set_osthread(osthread); 1094 1095 // initialize signal mask for this thread 1096 // and save the caller's signal mask 1097 os::Solaris::hotspot_sigmask(thread); 1098 1099 return true; 1100} 1101 1102bool os::create_main_thread(JavaThread* thread) { 1103#ifdef ASSERT 1104 thread->verify_not_published(); 1105#endif 1106 if (_starting_thread == NULL) { 1107 _starting_thread = create_os_thread(thread, main_thread); 1108 if (_starting_thread == NULL) { 1109 return false; 1110 } 1111 } 1112 1113 // The primodial thread is runnable from the start 1114 _starting_thread->set_state(RUNNABLE); 1115 1116 thread->set_osthread(_starting_thread); 1117 1118 // initialize signal mask for this thread 1119 // and save the caller's signal mask 1120 os::Solaris::hotspot_sigmask(thread); 1121 1122 return true; 1123} 1124 1125// _T2_libthread is true if we believe we are running with the newer 1126// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1127bool os::Solaris::_T2_libthread = false; 1128 1129bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1130 // Allocate the OSThread object 1131 OSThread* osthread = new OSThread(NULL, NULL); 1132 if (osthread == NULL) { 1133 return false; 1134 } 1135 1136 if ( ThreadPriorityVerbose ) { 1137 char *thrtyp; 1138 switch ( thr_type ) { 1139 case vm_thread: 1140 thrtyp = (char *)"vm"; 1141 break; 1142 case cgc_thread: 1143 thrtyp = (char *)"cgc"; 1144 break; 1145 case pgc_thread: 1146 thrtyp = (char *)"pgc"; 1147 break; 1148 case java_thread: 1149 thrtyp = (char *)"java"; 1150 break; 1151 case compiler_thread: 1152 thrtyp = (char *)"compiler"; 1153 break; 1154 case watcher_thread: 1155 thrtyp = (char *)"watcher"; 1156 break; 1157 default: 1158 thrtyp = (char *)"unknown"; 1159 break; 1160 } 1161 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1162 } 1163 1164 // Calculate stack size if it's not specified by caller. 1165 if (stack_size == 0) { 1166 // The default stack size 1M (2M for LP64). 1167 stack_size = (BytesPerWord >> 2) * K * K; 1168 1169 switch (thr_type) { 1170 case os::java_thread: 1171 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1172 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1173 break; 1174 case os::compiler_thread: 1175 if (CompilerThreadStackSize > 0) { 1176 stack_size = (size_t)(CompilerThreadStackSize * K); 1177 break; 1178 } // else fall through: 1179 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1180 case os::vm_thread: 1181 case os::pgc_thread: 1182 case os::cgc_thread: 1183 case os::watcher_thread: 1184 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1185 break; 1186 } 1187 } 1188 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1189 1190 // Initial state is ALLOCATED but not INITIALIZED 1191 osthread->set_state(ALLOCATED); 1192 1193 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1194 // We got lots of threads. Check if we still have some address space left. 1195 // Need to be at least 5Mb of unreserved address space. We do check by 1196 // trying to reserve some. 1197 const size_t VirtualMemoryBangSize = 20*K*K; 1198 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1199 if (mem == NULL) { 1200 delete osthread; 1201 return false; 1202 } else { 1203 // Release the memory again 1204 os::release_memory(mem, VirtualMemoryBangSize); 1205 } 1206 } 1207 1208 // Setup osthread because the child thread may need it. 1209 thread->set_osthread(osthread); 1210 1211 // Create the Solaris thread 1212 // explicit THR_BOUND for T2_libthread case in case 1213 // that assumption is not accurate, but our alternate signal stack 1214 // handling is based on it which must have bound threads 1215 thread_t tid = 0; 1216 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1217 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1218 (thr_type == vm_thread) || 1219 (thr_type == cgc_thread) || 1220 (thr_type == pgc_thread) || 1221 (thr_type == compiler_thread && BackgroundCompilation)) ? 1222 THR_BOUND : 0); 1223 int status; 1224 1225 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1226 // 1227 // On multiprocessors systems, libthread sometimes under-provisions our 1228 // process with LWPs. On a 30-way systems, for instance, we could have 1229 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1230 // to our process. This can result in under utilization of PEs. 1231 // I suspect the problem is related to libthread's LWP 1232 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1233 // upcall policy. 1234 // 1235 // The following code is palliative -- it attempts to ensure that our 1236 // process has sufficient LWPs to take advantage of multiple PEs. 1237 // Proper long-term cures include using user-level threads bound to LWPs 1238 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1239 // slight timing window with respect to sampling _os_thread_count, but 1240 // the race is benign. Also, we should periodically recompute 1241 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1242 // the number of PEs in our partition. You might be tempted to use 1243 // THR_NEW_LWP here, but I'd recommend against it as that could 1244 // result in undesirable growth of the libthread's LWP pool. 1245 // The fix below isn't sufficient; for instance, it doesn't take into count 1246 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1247 // 1248 // Some pathologies this scheme doesn't handle: 1249 // * Threads can block, releasing the LWPs. The LWPs can age out. 1250 // When a large number of threads become ready again there aren't 1251 // enough LWPs available to service them. This can occur when the 1252 // number of ready threads oscillates. 1253 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1254 // 1255 // Finally, we should call thr_setconcurrency() periodically to refresh 1256 // the LWP pool and thwart the LWP age-out mechanism. 1257 // The "+3" term provides a little slop -- we want to slightly overprovision. 1258 1259 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1260 if (!(flags & THR_BOUND)) { 1261 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1262 } 1263 } 1264 // Although this doesn't hurt, we should warn of undefined behavior 1265 // when using unbound T1 threads with schedctl(). This should never 1266 // happen, as the compiler and VM threads are always created bound 1267 DEBUG_ONLY( 1268 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1269 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1270 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1271 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1272 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1273 } 1274 ); 1275 1276 1277 // Mark that we don't have an lwp or thread id yet. 1278 // In case we attempt to set the priority before the thread starts. 1279 osthread->set_lwp_id(-1); 1280 osthread->set_thread_id(-1); 1281 1282 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1283 if (status != 0) { 1284 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1285 perror("os::create_thread"); 1286 } 1287 thread->set_osthread(NULL); 1288 // Need to clean up stuff we've allocated so far 1289 delete osthread; 1290 return false; 1291 } 1292 1293 Atomic::inc(&os::Solaris::_os_thread_count); 1294 1295 // Store info on the Solaris thread into the OSThread 1296 osthread->set_thread_id(tid); 1297 1298 // Remember that we created this thread so we can set priority on it 1299 osthread->set_vm_created(); 1300 1301 // Set the default thread priority otherwise use NormalPriority 1302 1303 if ( UseThreadPriorities ) { 1304 thr_setprio(tid, (DefaultThreadPriority == -1) ? 1305 java_to_os_priority[NormPriority] : 1306 DefaultThreadPriority); 1307 } 1308 1309 // Initial thread state is INITIALIZED, not SUSPENDED 1310 osthread->set_state(INITIALIZED); 1311 1312 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1313 return true; 1314} 1315 1316/* defined for >= Solaris 10. This allows builds on earlier versions 1317 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1318 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1319 * and -XX:+UseAltSigs does nothing since these should have no conflict 1320 */ 1321#if !defined(SIGJVM1) 1322#define SIGJVM1 39 1323#define SIGJVM2 40 1324#endif 1325 1326debug_only(static bool signal_sets_initialized = false); 1327static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1328int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1329int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1330 1331bool os::Solaris::is_sig_ignored(int sig) { 1332 struct sigaction oact; 1333 sigaction(sig, (struct sigaction*)NULL, &oact); 1334 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1335 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1336 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1337 return true; 1338 else 1339 return false; 1340} 1341 1342// Note: SIGRTMIN is a macro that calls sysconf() so it will 1343// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1344static bool isJVM1available() { 1345 return SIGJVM1 < SIGRTMIN; 1346} 1347 1348void os::Solaris::signal_sets_init() { 1349 // Should also have an assertion stating we are still single-threaded. 1350 assert(!signal_sets_initialized, "Already initialized"); 1351 // Fill in signals that are necessarily unblocked for all threads in 1352 // the VM. Currently, we unblock the following signals: 1353 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1354 // by -Xrs (=ReduceSignalUsage)); 1355 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1356 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1357 // the dispositions or masks wrt these signals. 1358 // Programs embedding the VM that want to use the above signals for their 1359 // own purposes must, at this time, use the "-Xrs" option to prevent 1360 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1361 // (See bug 4345157, and other related bugs). 1362 // In reality, though, unblocking these signals is really a nop, since 1363 // these signals are not blocked by default. 1364 sigemptyset(&unblocked_sigs); 1365 sigemptyset(&allowdebug_blocked_sigs); 1366 sigaddset(&unblocked_sigs, SIGILL); 1367 sigaddset(&unblocked_sigs, SIGSEGV); 1368 sigaddset(&unblocked_sigs, SIGBUS); 1369 sigaddset(&unblocked_sigs, SIGFPE); 1370 1371 if (isJVM1available) { 1372 os::Solaris::set_SIGinterrupt(SIGJVM1); 1373 os::Solaris::set_SIGasync(SIGJVM2); 1374 } else if (UseAltSigs) { 1375 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1376 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1377 } else { 1378 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1379 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1380 } 1381 1382 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1383 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1384 1385 if (!ReduceSignalUsage) { 1386 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1387 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1388 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1389 } 1390 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1391 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1392 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1393 } 1394 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1395 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1396 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1397 } 1398 } 1399 // Fill in signals that are blocked by all but the VM thread. 1400 sigemptyset(&vm_sigs); 1401 if (!ReduceSignalUsage) 1402 sigaddset(&vm_sigs, BREAK_SIGNAL); 1403 debug_only(signal_sets_initialized = true); 1404 1405 // For diagnostics only used in run_periodic_checks 1406 sigemptyset(&check_signal_done); 1407} 1408 1409// These are signals that are unblocked while a thread is running Java. 1410// (For some reason, they get blocked by default.) 1411sigset_t* os::Solaris::unblocked_signals() { 1412 assert(signal_sets_initialized, "Not initialized"); 1413 return &unblocked_sigs; 1414} 1415 1416// These are the signals that are blocked while a (non-VM) thread is 1417// running Java. Only the VM thread handles these signals. 1418sigset_t* os::Solaris::vm_signals() { 1419 assert(signal_sets_initialized, "Not initialized"); 1420 return &vm_sigs; 1421} 1422 1423// These are signals that are blocked during cond_wait to allow debugger in 1424sigset_t* os::Solaris::allowdebug_blocked_signals() { 1425 assert(signal_sets_initialized, "Not initialized"); 1426 return &allowdebug_blocked_sigs; 1427} 1428 1429// First crack at OS-specific initialization, from inside the new thread. 1430void os::initialize_thread() { 1431 int r = thr_main() ; 1432 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1433 if (r) { 1434 JavaThread* jt = (JavaThread *)Thread::current(); 1435 assert(jt != NULL,"Sanity check"); 1436 size_t stack_size; 1437 address base = jt->stack_base(); 1438 if (Arguments::created_by_java_launcher()) { 1439 // Use 2MB to allow for Solaris 7 64 bit mode. 1440 stack_size = JavaThread::stack_size_at_create() == 0 1441 ? 2048*K : JavaThread::stack_size_at_create(); 1442 1443 // There are rare cases when we may have already used more than 1444 // the basic stack size allotment before this method is invoked. 1445 // Attempt to allow for a normally sized java_stack. 1446 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1447 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1448 } else { 1449 // 6269555: If we were not created by a Java launcher, i.e. if we are 1450 // running embedded in a native application, treat the primordial thread 1451 // as much like a native attached thread as possible. This means using 1452 // the current stack size from thr_stksegment(), unless it is too large 1453 // to reliably setup guard pages. A reasonable max size is 8MB. 1454 size_t current_size = current_stack_size(); 1455 // This should never happen, but just in case.... 1456 if (current_size == 0) current_size = 2 * K * K; 1457 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1458 } 1459 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1460 stack_size = (size_t)(base - bottom); 1461 1462 assert(stack_size > 0, "Stack size calculation problem"); 1463 1464 if (stack_size > jt->stack_size()) { 1465 NOT_PRODUCT( 1466 struct rlimit limits; 1467 getrlimit(RLIMIT_STACK, &limits); 1468 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1469 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1470 ) 1471 tty->print_cr( 1472 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1473 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1474 "See limit(1) to increase the stack size limit.", 1475 stack_size / K, jt->stack_size() / K); 1476 vm_exit(1); 1477 } 1478 assert(jt->stack_size() >= stack_size, 1479 "Attempt to map more stack than was allocated"); 1480 jt->set_stack_size(stack_size); 1481 } 1482 1483 // 5/22/01: Right now alternate signal stacks do not handle 1484 // throwing stack overflow exceptions, see bug 4463178 1485 // Until a fix is found for this, T2 will NOT imply alternate signal 1486 // stacks. 1487 // If using T2 libthread threads, install an alternate signal stack. 1488 // Because alternate stacks associate with LWPs on Solaris, 1489 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1490 // we prefer to explicitly stack bang. 1491 // If not using T2 libthread, but using UseBoundThreads any threads 1492 // (primordial thread, jni_attachCurrentThread) we do not create, 1493 // probably are not bound, therefore they can not have an alternate 1494 // signal stack. Since our stack banging code is generated and 1495 // is shared across threads, all threads must be bound to allow 1496 // using alternate signal stacks. The alternative is to interpose 1497 // on _lwp_create to associate an alt sig stack with each LWP, 1498 // and this could be a problem when the JVM is embedded. 1499 // We would prefer to use alternate signal stacks with T2 1500 // Since there is currently no accurate way to detect T2 1501 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1502 // on installing alternate signal stacks 1503 1504 1505 // 05/09/03: removed alternate signal stack support for Solaris 1506 // The alternate signal stack mechanism is no longer needed to 1507 // handle stack overflow. This is now handled by allocating 1508 // guard pages (red zone) and stackbanging. 1509 // Initially the alternate signal stack mechanism was removed because 1510 // it did not work with T1 llibthread. Alternate 1511 // signal stacks MUST have all threads bound to lwps. Applications 1512 // can create their own threads and attach them without their being 1513 // bound under T1. This is frequently the case for the primordial thread. 1514 // If we were ever to reenable this mechanism we would need to 1515 // use the dynamic check for T2 libthread. 1516 1517 os::Solaris::init_thread_fpu_state(); 1518} 1519 1520 1521 1522// Free Solaris resources related to the OSThread 1523void os::free_thread(OSThread* osthread) { 1524 assert(osthread != NULL, "os::free_thread but osthread not set"); 1525 1526 1527 // We are told to free resources of the argument thread, 1528 // but we can only really operate on the current thread. 1529 // The main thread must take the VMThread down synchronously 1530 // before the main thread exits and frees up CodeHeap 1531 guarantee((Thread::current()->osthread() == osthread 1532 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1533 if (Thread::current()->osthread() == osthread) { 1534 // Restore caller's signal mask 1535 sigset_t sigmask = osthread->caller_sigmask(); 1536 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1537 } 1538 delete osthread; 1539} 1540 1541void os::pd_start_thread(Thread* thread) { 1542 int status = thr_continue(thread->osthread()->thread_id()); 1543 assert_status(status == 0, status, "thr_continue failed"); 1544} 1545 1546 1547intx os::current_thread_id() { 1548 return (intx)thr_self(); 1549} 1550 1551static pid_t _initial_pid = 0; 1552 1553int os::current_process_id() { 1554 return (int)(_initial_pid ? _initial_pid : getpid()); 1555} 1556 1557int os::allocate_thread_local_storage() { 1558 // %%% in Win32 this allocates a memory segment pointed to by a 1559 // register. Dan Stein can implement a similar feature in 1560 // Solaris. Alternatively, the VM can do the same thing 1561 // explicitly: malloc some storage and keep the pointer in a 1562 // register (which is part of the thread's context) (or keep it 1563 // in TLS). 1564 // %%% In current versions of Solaris, thr_self and TSD can 1565 // be accessed via short sequences of displaced indirections. 1566 // The value of thr_self is available as %g7(36). 1567 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1568 // assuming that the current thread already has a value bound to k. 1569 // It may be worth experimenting with such access patterns, 1570 // and later having the parameters formally exported from a Solaris 1571 // interface. I think, however, that it will be faster to 1572 // maintain the invariant that %g2 always contains the 1573 // JavaThread in Java code, and have stubs simply 1574 // treat %g2 as a caller-save register, preserving it in a %lN. 1575 thread_key_t tk; 1576 if (thr_keycreate( &tk, NULL ) ) 1577 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); 1578 return int(tk); 1579} 1580 1581void os::free_thread_local_storage(int index) { 1582 // %%% don't think we need anything here 1583 // if ( pthread_key_delete((pthread_key_t) tk) ) 1584 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1585} 1586 1587#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1588 // small number - point is NO swap space available 1589void os::thread_local_storage_at_put(int index, void* value) { 1590 // %%% this is used only in threadLocalStorage.cpp 1591 if (thr_setspecific((thread_key_t)index, value)) { 1592 if (errno == ENOMEM) { 1593 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1594 } else { 1595 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); 1596 } 1597 } else { 1598 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1599 } 1600} 1601 1602// This function could be called before TLS is initialized, for example, when 1603// VM receives an async signal or when VM causes a fatal error during 1604// initialization. Return NULL if thr_getspecific() fails. 1605void* os::thread_local_storage_at(int index) { 1606 // %%% this is used only in threadLocalStorage.cpp 1607 void* r = NULL; 1608 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1609} 1610 1611 1612const int NANOSECS_PER_MILLISECS = 1000000; 1613// gethrtime can move backwards if read from one cpu and then a different cpu 1614// getTimeNanos is guaranteed to not move backward on Solaris 1615// local spinloop created as faster for a CAS on an int than 1616// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1617// supported on sparc v8 or pre supports_cx8 intel boxes. 1618// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1619// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1620inline hrtime_t oldgetTimeNanos() { 1621 int gotlock = LOCK_INVALID; 1622 hrtime_t newtime = gethrtime(); 1623 1624 for (;;) { 1625// grab lock for max_hrtime 1626 int curlock = max_hrtime_lock; 1627 if (curlock & LOCK_BUSY) continue; 1628 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1629 if (newtime > max_hrtime) { 1630 max_hrtime = newtime; 1631 } else { 1632 newtime = max_hrtime; 1633 } 1634 // release lock 1635 max_hrtime_lock = LOCK_FREE; 1636 return newtime; 1637 } 1638} 1639// gethrtime can move backwards if read from one cpu and then a different cpu 1640// getTimeNanos is guaranteed to not move backward on Solaris 1641inline hrtime_t getTimeNanos() { 1642 if (VM_Version::supports_cx8()) { 1643 bool retry = false; 1644 hrtime_t newtime = gethrtime(); 1645 hrtime_t oldmaxtime = max_hrtime; 1646 hrtime_t retmaxtime = oldmaxtime; 1647 while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) { 1648 oldmaxtime = retmaxtime; 1649 retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime); 1650 retry = true; 1651 } 1652 return (newtime > retmaxtime) ? newtime : retmaxtime; 1653 } else { 1654 return oldgetTimeNanos(); 1655 } 1656} 1657 1658// Time since start-up in seconds to a fine granularity. 1659// Used by VMSelfDestructTimer and the MemProfiler. 1660double os::elapsedTime() { 1661 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1662} 1663 1664jlong os::elapsed_counter() { 1665 return (jlong)(getTimeNanos() - first_hrtime); 1666} 1667 1668jlong os::elapsed_frequency() { 1669 return hrtime_hz; 1670} 1671 1672// Return the real, user, and system times in seconds from an 1673// arbitrary fixed point in the past. 1674bool os::getTimesSecs(double* process_real_time, 1675 double* process_user_time, 1676 double* process_system_time) { 1677 struct tms ticks; 1678 clock_t real_ticks = times(&ticks); 1679 1680 if (real_ticks == (clock_t) (-1)) { 1681 return false; 1682 } else { 1683 double ticks_per_second = (double) clock_tics_per_sec; 1684 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1685 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1686 // For consistency return the real time from getTimeNanos() 1687 // converted to seconds. 1688 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1689 1690 return true; 1691 } 1692} 1693 1694bool os::supports_vtime() { return true; } 1695 1696bool os::enable_vtime() { 1697 int fd = open("/proc/self/ctl", O_WRONLY); 1698 if (fd == -1) 1699 return false; 1700 1701 long cmd[] = { PCSET, PR_MSACCT }; 1702 int res = write(fd, cmd, sizeof(long) * 2); 1703 close(fd); 1704 if (res != sizeof(long) * 2) 1705 return false; 1706 1707 return true; 1708} 1709 1710bool os::vtime_enabled() { 1711 int fd = open("/proc/self/status", O_RDONLY); 1712 if (fd == -1) 1713 return false; 1714 1715 pstatus_t status; 1716 int res = read(fd, (void*) &status, sizeof(pstatus_t)); 1717 close(fd); 1718 if (res != sizeof(pstatus_t)) 1719 return false; 1720 1721 return status.pr_flags & PR_MSACCT; 1722} 1723 1724double os::elapsedVTime() { 1725 return (double)gethrvtime() / (double)hrtime_hz; 1726} 1727 1728// Used internally for comparisons only 1729// getTimeMillis guaranteed to not move backwards on Solaris 1730jlong getTimeMillis() { 1731 jlong nanotime = getTimeNanos(); 1732 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1733} 1734 1735// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1736jlong os::javaTimeMillis() { 1737 timeval t; 1738 if (gettimeofday( &t, NULL) == -1) 1739 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); 1740 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1741} 1742 1743jlong os::javaTimeNanos() { 1744 return (jlong)getTimeNanos(); 1745} 1746 1747void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1748 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1749 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1750 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1751 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1752} 1753 1754char * os::local_time_string(char *buf, size_t buflen) { 1755 struct tm t; 1756 time_t long_time; 1757 time(&long_time); 1758 localtime_r(&long_time, &t); 1759 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1760 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1761 t.tm_hour, t.tm_min, t.tm_sec); 1762 return buf; 1763} 1764 1765// Note: os::shutdown() might be called very early during initialization, or 1766// called from signal handler. Before adding something to os::shutdown(), make 1767// sure it is async-safe and can handle partially initialized VM. 1768void os::shutdown() { 1769 1770 // allow PerfMemory to attempt cleanup of any persistent resources 1771 perfMemory_exit(); 1772 1773 // needs to remove object in file system 1774 AttachListener::abort(); 1775 1776 // flush buffered output, finish log files 1777 ostream_abort(); 1778 1779 // Check for abort hook 1780 abort_hook_t abort_hook = Arguments::abort_hook(); 1781 if (abort_hook != NULL) { 1782 abort_hook(); 1783 } 1784} 1785 1786// Note: os::abort() might be called very early during initialization, or 1787// called from signal handler. Before adding something to os::abort(), make 1788// sure it is async-safe and can handle partially initialized VM. 1789void os::abort(bool dump_core) { 1790 os::shutdown(); 1791 if (dump_core) { 1792#ifndef PRODUCT 1793 fdStream out(defaultStream::output_fd()); 1794 out.print_raw("Current thread is "); 1795 char buf[16]; 1796 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1797 out.print_raw_cr(buf); 1798 out.print_raw_cr("Dumping core ..."); 1799#endif 1800 ::abort(); // dump core (for debugging) 1801 } 1802 1803 ::exit(1); 1804} 1805 1806// Die immediately, no exit hook, no abort hook, no cleanup. 1807void os::die() { 1808 _exit(-1); 1809} 1810 1811// unused 1812void os::set_error_file(const char *logfile) {} 1813 1814// DLL functions 1815 1816const char* os::dll_file_extension() { return ".so"; } 1817 1818const char* os::get_temp_directory() { return "/tmp/"; } 1819 1820void os::dll_build_name( 1821 char* buffer, size_t buflen, const char* pname, const char* fname) { 1822 // copied from libhpi 1823 const size_t pnamelen = pname ? strlen(pname) : 0; 1824 1825 /* Quietly truncate on buffer overflow. Should be an error. */ 1826 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1827 *buffer = '\0'; 1828 return; 1829 } 1830 1831 if (pnamelen == 0) { 1832 sprintf(buffer, "lib%s.so", fname); 1833 } else { 1834 sprintf(buffer, "%s/lib%s.so", pname, fname); 1835 } 1836} 1837 1838const char* os::get_current_directory(char *buf, int buflen) { 1839 return getcwd(buf, buflen); 1840} 1841 1842// check if addr is inside libjvm[_g].so 1843bool os::address_is_in_vm(address addr) { 1844 static address libjvm_base_addr; 1845 Dl_info dlinfo; 1846 1847 if (libjvm_base_addr == NULL) { 1848 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1849 libjvm_base_addr = (address)dlinfo.dli_fbase; 1850 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1851 } 1852 1853 if (dladdr((void *)addr, &dlinfo)) { 1854 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1855 } 1856 1857 return false; 1858} 1859 1860typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1861static dladdr1_func_type dladdr1_func = NULL; 1862 1863bool os::dll_address_to_function_name(address addr, char *buf, 1864 int buflen, int * offset) { 1865 Dl_info dlinfo; 1866 1867 // dladdr1_func was initialized in os::init() 1868 if (dladdr1_func){ 1869 // yes, we have dladdr1 1870 1871 // Support for dladdr1 is checked at runtime; it may be 1872 // available even if the vm is built on a machine that does 1873 // not have dladdr1 support. Make sure there is a value for 1874 // RTLD_DL_SYMENT. 1875 #ifndef RTLD_DL_SYMENT 1876 #define RTLD_DL_SYMENT 1 1877 #endif 1878 Sym * info; 1879 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1880 RTLD_DL_SYMENT)) { 1881 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1882 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1883 1884 // check if the returned symbol really covers addr 1885 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); 1886 } else { 1887 if (buf) buf[0] = '\0'; 1888 if (offset) *offset = -1; 1889 return false; 1890 } 1891 } else { 1892 // no, only dladdr is available 1893 if(dladdr((void *)addr, &dlinfo)) { 1894 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); 1895 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1896 return true; 1897 } else { 1898 if (buf) buf[0] = '\0'; 1899 if (offset) *offset = -1; 1900 return false; 1901 } 1902 } 1903} 1904 1905bool os::dll_address_to_library_name(address addr, char* buf, 1906 int buflen, int* offset) { 1907 Dl_info dlinfo; 1908 1909 if (dladdr((void*)addr, &dlinfo)){ 1910 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1911 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 1912 return true; 1913 } else { 1914 if (buf) buf[0] = '\0'; 1915 if (offset) *offset = -1; 1916 return false; 1917 } 1918} 1919 1920// Prints the names and full paths of all opened dynamic libraries 1921// for current process 1922void os::print_dll_info(outputStream * st) { 1923 Dl_info dli; 1924 void *handle; 1925 Link_map *map; 1926 Link_map *p; 1927 1928 st->print_cr("Dynamic libraries:"); st->flush(); 1929 1930 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 1931 st->print_cr("Error: Cannot print dynamic libraries."); 1932 return; 1933 } 1934 handle = dlopen(dli.dli_fname, RTLD_LAZY); 1935 if (handle == NULL) { 1936 st->print_cr("Error: Cannot print dynamic libraries."); 1937 return; 1938 } 1939 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1940 if (map == NULL) { 1941 st->print_cr("Error: Cannot print dynamic libraries."); 1942 return; 1943 } 1944 1945 while (map->l_prev != NULL) 1946 map = map->l_prev; 1947 1948 while (map != NULL) { 1949 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 1950 map = map->l_next; 1951 } 1952 1953 dlclose(handle); 1954} 1955 1956 // Loads .dll/.so and 1957 // in case of error it checks if .dll/.so was built for the 1958 // same architecture as Hotspot is running on 1959 1960void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 1961{ 1962 void * result= ::dlopen(filename, RTLD_LAZY); 1963 if (result != NULL) { 1964 // Successful loading 1965 return result; 1966 } 1967 1968 Elf32_Ehdr elf_head; 1969 1970 // Read system error message into ebuf 1971 // It may or may not be overwritten below 1972 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1973 ebuf[ebuflen-1]='\0'; 1974 int diag_msg_max_length=ebuflen-strlen(ebuf); 1975 char* diag_msg_buf=ebuf+strlen(ebuf); 1976 1977 if (diag_msg_max_length==0) { 1978 // No more space in ebuf for additional diagnostics message 1979 return NULL; 1980 } 1981 1982 1983 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1984 1985 if (file_descriptor < 0) { 1986 // Can't open library, report dlerror() message 1987 return NULL; 1988 } 1989 1990 bool failed_to_read_elf_head= 1991 (sizeof(elf_head)!= 1992 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 1993 1994 ::close(file_descriptor); 1995 if (failed_to_read_elf_head) { 1996 // file i/o error - report dlerror() msg 1997 return NULL; 1998 } 1999 2000 typedef struct { 2001 Elf32_Half code; // Actual value as defined in elf.h 2002 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2003 char elf_class; // 32 or 64 bit 2004 char endianess; // MSB or LSB 2005 char* name; // String representation 2006 } arch_t; 2007 2008 static const arch_t arch_array[]={ 2009 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2010 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2011 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2012 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2013 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2014 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2015 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2016 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2017 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} 2018 }; 2019 2020 #if (defined IA32) 2021 static Elf32_Half running_arch_code=EM_386; 2022 #elif (defined AMD64) 2023 static Elf32_Half running_arch_code=EM_X86_64; 2024 #elif (defined IA64) 2025 static Elf32_Half running_arch_code=EM_IA_64; 2026 #elif (defined __sparc) && (defined _LP64) 2027 static Elf32_Half running_arch_code=EM_SPARCV9; 2028 #elif (defined __sparc) && (!defined _LP64) 2029 static Elf32_Half running_arch_code=EM_SPARC; 2030 #elif (defined __powerpc64__) 2031 static Elf32_Half running_arch_code=EM_PPC64; 2032 #elif (defined __powerpc__) 2033 static Elf32_Half running_arch_code=EM_PPC; 2034 #else 2035 #error Method os::dll_load requires that one of following is defined:\ 2036 IA32, AMD64, IA64, __sparc, __powerpc__ 2037 #endif 2038 2039 // Identify compatability class for VM's architecture and library's architecture 2040 // Obtain string descriptions for architectures 2041 2042 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2043 int running_arch_index=-1; 2044 2045 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2046 if (running_arch_code == arch_array[i].code) { 2047 running_arch_index = i; 2048 } 2049 if (lib_arch.code == arch_array[i].code) { 2050 lib_arch.compat_class = arch_array[i].compat_class; 2051 lib_arch.name = arch_array[i].name; 2052 } 2053 } 2054 2055 assert(running_arch_index != -1, 2056 "Didn't find running architecture code (running_arch_code) in arch_array"); 2057 if (running_arch_index == -1) { 2058 // Even though running architecture detection failed 2059 // we may still continue with reporting dlerror() message 2060 return NULL; 2061 } 2062 2063 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2064 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2065 return NULL; 2066 } 2067 2068 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2069 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2070 return NULL; 2071 } 2072 2073 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2074 if ( lib_arch.name!=NULL ) { 2075 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2076 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2077 lib_arch.name, arch_array[running_arch_index].name); 2078 } else { 2079 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2080 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2081 lib_arch.code, 2082 arch_array[running_arch_index].name); 2083 } 2084 } 2085 2086 return NULL; 2087} 2088 2089void* os::dll_lookup(void* handle, const char* name) { 2090 return dlsym(handle, name); 2091} 2092 2093 2094bool _print_ascii_file(const char* filename, outputStream* st) { 2095 int fd = open(filename, O_RDONLY); 2096 if (fd == -1) { 2097 return false; 2098 } 2099 2100 char buf[32]; 2101 int bytes; 2102 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { 2103 st->print_raw(buf, bytes); 2104 } 2105 2106 close(fd); 2107 2108 return true; 2109} 2110 2111void os::print_os_info(outputStream* st) { 2112 st->print("OS:"); 2113 2114 if (!_print_ascii_file("/etc/release", st)) { 2115 st->print("Solaris"); 2116 } 2117 st->cr(); 2118 2119 // kernel 2120 st->print("uname:"); 2121 struct utsname name; 2122 uname(&name); 2123 st->print(name.sysname); st->print(" "); 2124 st->print(name.release); st->print(" "); 2125 st->print(name.version); st->print(" "); 2126 st->print(name.machine); 2127 2128 // libthread 2129 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2130 else st->print(" (T1 libthread)"); 2131 st->cr(); 2132 2133 // rlimit 2134 st->print("rlimit:"); 2135 struct rlimit rlim; 2136 2137 st->print(" STACK "); 2138 getrlimit(RLIMIT_STACK, &rlim); 2139 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2140 else st->print("%uk", rlim.rlim_cur >> 10); 2141 2142 st->print(", CORE "); 2143 getrlimit(RLIMIT_CORE, &rlim); 2144 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2145 else st->print("%uk", rlim.rlim_cur >> 10); 2146 2147 st->print(", NOFILE "); 2148 getrlimit(RLIMIT_NOFILE, &rlim); 2149 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2150 else st->print("%d", rlim.rlim_cur); 2151 2152 st->print(", AS "); 2153 getrlimit(RLIMIT_AS, &rlim); 2154 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2155 else st->print("%uk", rlim.rlim_cur >> 10); 2156 st->cr(); 2157 2158 // load average 2159 st->print("load average:"); 2160 double loadavg[3]; 2161 os::loadavg(loadavg, 3); 2162 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2163 st->cr(); 2164} 2165 2166 2167static bool check_addr0(outputStream* st) { 2168 jboolean status = false; 2169 int fd = open("/proc/self/map",O_RDONLY); 2170 if (fd >= 0) { 2171 prmap_t p; 2172 while(read(fd, &p, sizeof(p)) > 0) { 2173 if (p.pr_vaddr == 0x0) { 2174 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2175 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2176 st->print("Access:"); 2177 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2178 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2179 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2180 st->cr(); 2181 status = true; 2182 } 2183 close(fd); 2184 } 2185 } 2186 return status; 2187} 2188 2189void os::print_memory_info(outputStream* st) { 2190 st->print("Memory:"); 2191 st->print(" %dk page", os::vm_page_size()>>10); 2192 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2193 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2194 st->cr(); 2195 (void) check_addr0(st); 2196} 2197 2198// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2199// but they're the same for all the solaris architectures that we support. 2200const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2201 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2202 "ILL_COPROC", "ILL_BADSTK" }; 2203 2204const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2205 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2206 "FPE_FLTINV", "FPE_FLTSUB" }; 2207 2208const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2209 2210const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2211 2212void os::print_siginfo(outputStream* st, void* siginfo) { 2213 st->print("siginfo:"); 2214 2215 const int buflen = 100; 2216 char buf[buflen]; 2217 siginfo_t *si = (siginfo_t*)siginfo; 2218 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2219 char *err = strerror(si->si_errno); 2220 if (si->si_errno != 0 && err != NULL) { 2221 st->print("si_errno=%s", err); 2222 } else { 2223 st->print("si_errno=%d", si->si_errno); 2224 } 2225 const int c = si->si_code; 2226 assert(c > 0, "unexpected si_code"); 2227 switch (si->si_signo) { 2228 case SIGILL: 2229 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2230 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2231 break; 2232 case SIGFPE: 2233 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2234 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2235 break; 2236 case SIGSEGV: 2237 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2238 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2239 break; 2240 case SIGBUS: 2241 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2242 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2243 break; 2244 default: 2245 st->print(", si_code=%d", si->si_code); 2246 // no si_addr 2247 } 2248 2249 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2250 UseSharedSpaces) { 2251 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2252 if (mapinfo->is_in_shared_space(si->si_addr)) { 2253 st->print("\n\nError accessing class data sharing archive." \ 2254 " Mapped file inaccessible during execution, " \ 2255 " possible disk/network problem."); 2256 } 2257 } 2258 st->cr(); 2259} 2260 2261// Moved from whole group, because we need them here for diagnostic 2262// prints. 2263#define OLDMAXSIGNUM 32 2264static int Maxsignum = 0; 2265static int *ourSigFlags = NULL; 2266 2267extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2268 2269int os::Solaris::get_our_sigflags(int sig) { 2270 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2271 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2272 return ourSigFlags[sig]; 2273} 2274 2275void os::Solaris::set_our_sigflags(int sig, int flags) { 2276 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2277 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2278 ourSigFlags[sig] = flags; 2279} 2280 2281 2282static const char* get_signal_handler_name(address handler, 2283 char* buf, int buflen) { 2284 int offset; 2285 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2286 if (found) { 2287 // skip directory names 2288 const char *p1, *p2; 2289 p1 = buf; 2290 size_t len = strlen(os::file_separator()); 2291 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2292 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2293 } else { 2294 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2295 } 2296 return buf; 2297} 2298 2299static void print_signal_handler(outputStream* st, int sig, 2300 char* buf, size_t buflen) { 2301 struct sigaction sa; 2302 2303 sigaction(sig, NULL, &sa); 2304 2305 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2306 2307 address handler = (sa.sa_flags & SA_SIGINFO) 2308 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2309 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2310 2311 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2312 st->print("SIG_DFL"); 2313 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2314 st->print("SIG_IGN"); 2315 } else { 2316 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2317 } 2318 2319 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2320 2321 address rh = VMError::get_resetted_sighandler(sig); 2322 // May be, handler was resetted by VMError? 2323 if(rh != NULL) { 2324 handler = rh; 2325 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2326 } 2327 2328 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2329 2330 // Check: is it our handler? 2331 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2332 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2333 // It is our signal handler 2334 // check for flags 2335 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2336 st->print( 2337 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2338 os::Solaris::get_our_sigflags(sig)); 2339 } 2340 } 2341 st->cr(); 2342} 2343 2344void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2345 st->print_cr("Signal Handlers:"); 2346 print_signal_handler(st, SIGSEGV, buf, buflen); 2347 print_signal_handler(st, SIGBUS , buf, buflen); 2348 print_signal_handler(st, SIGFPE , buf, buflen); 2349 print_signal_handler(st, SIGPIPE, buf, buflen); 2350 print_signal_handler(st, SIGXFSZ, buf, buflen); 2351 print_signal_handler(st, SIGILL , buf, buflen); 2352 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2353 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2354 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2355 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2356 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2357 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2358 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2359 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2360} 2361 2362static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2363 2364// Find the full path to the current module, libjvm.so or libjvm_g.so 2365void os::jvm_path(char *buf, jint buflen) { 2366 // Error checking. 2367 if (buflen < MAXPATHLEN) { 2368 assert(false, "must use a large-enough buffer"); 2369 buf[0] = '\0'; 2370 return; 2371 } 2372 // Lazy resolve the path to current module. 2373 if (saved_jvm_path[0] != 0) { 2374 strcpy(buf, saved_jvm_path); 2375 return; 2376 } 2377 2378 Dl_info dlinfo; 2379 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2380 assert(ret != 0, "cannot locate libjvm"); 2381 realpath((char *)dlinfo.dli_fname, buf); 2382 2383 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2384 // Support for the gamma launcher. Typical value for buf is 2385 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2386 // the right place in the string, then assume we are installed in a JDK and 2387 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2388 // up the path so it looks like libjvm.so is installed there (append a 2389 // fake suffix hotspot/libjvm.so). 2390 const char *p = buf + strlen(buf) - 1; 2391 for (int count = 0; p > buf && count < 5; ++count) { 2392 for (--p; p > buf && *p != '/'; --p) 2393 /* empty */ ; 2394 } 2395 2396 if (strncmp(p, "/jre/lib/", 9) != 0) { 2397 // Look for JAVA_HOME in the environment. 2398 char* java_home_var = ::getenv("JAVA_HOME"); 2399 if (java_home_var != NULL && java_home_var[0] != 0) { 2400 char cpu_arch[12]; 2401 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2402#ifdef _LP64 2403 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2404 if (strcmp(cpu_arch, "sparc") == 0) { 2405 strcat(cpu_arch, "v9"); 2406 } else if (strcmp(cpu_arch, "i386") == 0) { 2407 strcpy(cpu_arch, "amd64"); 2408 } 2409#endif 2410 // Check the current module name "libjvm.so" or "libjvm_g.so". 2411 p = strrchr(buf, '/'); 2412 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2413 p = strstr(p, "_g") ? "_g" : ""; 2414 2415 realpath(java_home_var, buf); 2416 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); 2417 if (0 == access(buf, F_OK)) { 2418 // Use current module name "libjvm[_g].so" instead of 2419 // "libjvm"debug_only("_g")".so" since for fastdebug version 2420 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2421 // It is used when we are choosing the HPI library's name 2422 // "libhpi[_g].so" in hpi::initialize_get_interface(). 2423 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); 2424 } else { 2425 // Go back to path of .so 2426 realpath((char *)dlinfo.dli_fname, buf); 2427 } 2428 } 2429 } 2430 } 2431 2432 strcpy(saved_jvm_path, buf); 2433} 2434 2435 2436void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2437 // no prefix required, not even "_" 2438} 2439 2440 2441void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2442 // no suffix required 2443} 2444 2445 2446// sun.misc.Signal 2447 2448extern "C" { 2449 static void UserHandler(int sig, void *siginfo, void *context) { 2450 // Ctrl-C is pressed during error reporting, likely because the error 2451 // handler fails to abort. Let VM die immediately. 2452 if (sig == SIGINT && is_error_reported()) { 2453 os::die(); 2454 } 2455 2456 os::signal_notify(sig); 2457 // We do not need to reinstate the signal handler each time... 2458 } 2459} 2460 2461void* os::user_handler() { 2462 return CAST_FROM_FN_PTR(void*, UserHandler); 2463} 2464 2465extern "C" { 2466 typedef void (*sa_handler_t)(int); 2467 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2468} 2469 2470void* os::signal(int signal_number, void* handler) { 2471 struct sigaction sigAct, oldSigAct; 2472 sigfillset(&(sigAct.sa_mask)); 2473 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2474 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2475 2476 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2477 // -1 means registration failed 2478 return (void *)-1; 2479 2480 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2481} 2482 2483void os::signal_raise(int signal_number) { 2484 raise(signal_number); 2485} 2486 2487/* 2488 * The following code is moved from os.cpp for making this 2489 * code platform specific, which it is by its very nature. 2490 */ 2491 2492// a counter for each possible signal value 2493static int Sigexit = 0; 2494static int Maxlibjsigsigs; 2495static jint *pending_signals = NULL; 2496static int *preinstalled_sigs = NULL; 2497static struct sigaction *chainedsigactions = NULL; 2498static sema_t sig_sem; 2499typedef int (*version_getting_t)(); 2500version_getting_t os::Solaris::get_libjsig_version = NULL; 2501static int libjsigversion = NULL; 2502 2503int os::sigexitnum_pd() { 2504 assert(Sigexit > 0, "signal memory not yet initialized"); 2505 return Sigexit; 2506} 2507 2508void os::Solaris::init_signal_mem() { 2509 // Initialize signal structures 2510 Maxsignum = SIGRTMAX; 2511 Sigexit = Maxsignum+1; 2512 assert(Maxsignum >0, "Unable to obtain max signal number"); 2513 2514 Maxlibjsigsigs = Maxsignum; 2515 2516 // pending_signals has one int per signal 2517 // The additional signal is for SIGEXIT - exit signal to signal_thread 2518 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2519 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2520 2521 if (UseSignalChaining) { 2522 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2523 * (Maxsignum + 1)); 2524 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2525 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2526 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2527 } 2528 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2529 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2530} 2531 2532void os::signal_init_pd() { 2533 int ret; 2534 2535 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2536 assert(ret == 0, "sema_init() failed"); 2537} 2538 2539void os::signal_notify(int signal_number) { 2540 int ret; 2541 2542 Atomic::inc(&pending_signals[signal_number]); 2543 ret = ::sema_post(&sig_sem); 2544 assert(ret == 0, "sema_post() failed"); 2545} 2546 2547static int check_pending_signals(bool wait_for_signal) { 2548 int ret; 2549 while (true) { 2550 for (int i = 0; i < Sigexit + 1; i++) { 2551 jint n = pending_signals[i]; 2552 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2553 return i; 2554 } 2555 } 2556 if (!wait_for_signal) { 2557 return -1; 2558 } 2559 JavaThread *thread = JavaThread::current(); 2560 ThreadBlockInVM tbivm(thread); 2561 2562 bool threadIsSuspended; 2563 do { 2564 thread->set_suspend_equivalent(); 2565 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2566 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2567 ; 2568 assert(ret == 0, "sema_wait() failed"); 2569 2570 // were we externally suspended while we were waiting? 2571 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2572 if (threadIsSuspended) { 2573 // 2574 // The semaphore has been incremented, but while we were waiting 2575 // another thread suspended us. We don't want to continue running 2576 // while suspended because that would surprise the thread that 2577 // suspended us. 2578 // 2579 ret = ::sema_post(&sig_sem); 2580 assert(ret == 0, "sema_post() failed"); 2581 2582 thread->java_suspend_self(); 2583 } 2584 } while (threadIsSuspended); 2585 } 2586} 2587 2588int os::signal_lookup() { 2589 return check_pending_signals(false); 2590} 2591 2592int os::signal_wait() { 2593 return check_pending_signals(true); 2594} 2595 2596//////////////////////////////////////////////////////////////////////////////// 2597// Virtual Memory 2598 2599static int page_size = -1; 2600 2601// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2602// clear this var if support is not available. 2603static bool has_map_align = true; 2604 2605int os::vm_page_size() { 2606 assert(page_size != -1, "must call os::init"); 2607 return page_size; 2608} 2609 2610// Solaris allocates memory by pages. 2611int os::vm_allocation_granularity() { 2612 assert(page_size != -1, "must call os::init"); 2613 return page_size; 2614} 2615 2616bool os::commit_memory(char* addr, size_t bytes) { 2617 size_t size = bytes; 2618 return 2619 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, 2620 PROT_READ | PROT_WRITE | PROT_EXEC); 2621} 2622 2623bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { 2624 if (commit_memory(addr, bytes)) { 2625 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2626 // If the large page size has been set and the VM 2627 // is using large pages, use the large page size 2628 // if it is smaller than the alignment hint. This is 2629 // a case where the VM wants to use a larger alignment size 2630 // for its own reasons but still want to use large pages 2631 // (which is what matters to setting the mpss range. 2632 size_t page_size = 0; 2633 if (large_page_size() < alignment_hint) { 2634 assert(UseLargePages, "Expected to be here for large page use only"); 2635 page_size = large_page_size(); 2636 } else { 2637 // If the alignment hint is less than the large page 2638 // size, the VM wants a particular alignment (thus the hint) 2639 // for internal reasons. Try to set the mpss range using 2640 // the alignment_hint. 2641 page_size = alignment_hint; 2642 } 2643 // Since this is a hint, ignore any failures. 2644 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2645 } 2646 return true; 2647 } 2648 return false; 2649} 2650 2651// Uncommit the pages in a specified region. 2652void os::free_memory(char* addr, size_t bytes) { 2653 if (madvise(addr, bytes, MADV_FREE) < 0) { 2654 debug_only(warning("MADV_FREE failed.")); 2655 return; 2656 } 2657} 2658 2659// Change the page size in a given range. 2660void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2661 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2662 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2663 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2664} 2665 2666// Tell the OS to make the range local to the first-touching LWP 2667void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2668 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2669 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2670 debug_only(warning("MADV_ACCESS_LWP failed.")); 2671 } 2672} 2673 2674// Tell the OS that this range would be accessed from different LWPs. 2675void os::numa_make_global(char *addr, size_t bytes) { 2676 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2677 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2678 debug_only(warning("MADV_ACCESS_MANY failed.")); 2679 } 2680} 2681 2682// Get the number of the locality groups. 2683size_t os::numa_get_groups_num() { 2684 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2685 return n != -1 ? n : 1; 2686} 2687 2688// Get a list of leaf locality groups. A leaf lgroup is group that 2689// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2690// board. An LWP is assigned to one of these groups upon creation. 2691size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2692 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2693 ids[0] = 0; 2694 return 1; 2695 } 2696 int result_size = 0, top = 1, bottom = 0, cur = 0; 2697 for (int k = 0; k < size; k++) { 2698 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2699 (Solaris::lgrp_id_t*)&ids[top], size - top); 2700 if (r == -1) { 2701 ids[0] = 0; 2702 return 1; 2703 } 2704 if (!r) { 2705 // That's a leaf node. 2706 assert (bottom <= cur, "Sanity check"); 2707 // Check if the node has memory 2708 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2709 NULL, 0, LGRP_RSRC_MEM) > 0) { 2710 ids[bottom++] = ids[cur]; 2711 } 2712 } 2713 top += r; 2714 cur++; 2715 } 2716 if (bottom == 0) { 2717 // Handle a situation, when the OS reports no memory available. 2718 // Assume UMA architecture. 2719 ids[0] = 0; 2720 return 1; 2721 } 2722 return bottom; 2723} 2724 2725// Detect the topology change. Typically happens during CPU plugging-unplugging. 2726bool os::numa_topology_changed() { 2727 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2728 if (is_stale != -1 && is_stale) { 2729 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2730 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2731 assert(c != 0, "Failure to initialize LGRP API"); 2732 Solaris::set_lgrp_cookie(c); 2733 return true; 2734 } 2735 return false; 2736} 2737 2738// Get the group id of the current LWP. 2739int os::numa_get_group_id() { 2740 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2741 if (lgrp_id == -1) { 2742 return 0; 2743 } 2744 const int size = os::numa_get_groups_num(); 2745 int *ids = (int*)alloca(size * sizeof(int)); 2746 2747 // Get the ids of all lgroups with memory; r is the count. 2748 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2749 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2750 if (r <= 0) { 2751 return 0; 2752 } 2753 return ids[os::random() % r]; 2754} 2755 2756// Request information about the page. 2757bool os::get_page_info(char *start, page_info* info) { 2758 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2759 uint64_t addr = (uintptr_t)start; 2760 uint64_t outdata[2]; 2761 uint_t validity = 0; 2762 2763 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2764 return false; 2765 } 2766 2767 info->size = 0; 2768 info->lgrp_id = -1; 2769 2770 if ((validity & 1) != 0) { 2771 if ((validity & 2) != 0) { 2772 info->lgrp_id = outdata[0]; 2773 } 2774 if ((validity & 4) != 0) { 2775 info->size = outdata[1]; 2776 } 2777 return true; 2778 } 2779 return false; 2780} 2781 2782// Scan the pages from start to end until a page different than 2783// the one described in the info parameter is encountered. 2784char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2785 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2786 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2787 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2788 uint_t validity[MAX_MEMINFO_CNT]; 2789 2790 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2791 uint64_t p = (uint64_t)start; 2792 while (p < (uint64_t)end) { 2793 addrs[0] = p; 2794 size_t addrs_count = 1; 2795 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2796 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2797 addrs_count++; 2798 } 2799 2800 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2801 return NULL; 2802 } 2803 2804 size_t i = 0; 2805 for (; i < addrs_count; i++) { 2806 if ((validity[i] & 1) != 0) { 2807 if ((validity[i] & 4) != 0) { 2808 if (outdata[types * i + 1] != page_expected->size) { 2809 break; 2810 } 2811 } else 2812 if (page_expected->size != 0) { 2813 break; 2814 } 2815 2816 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2817 if (outdata[types * i] != page_expected->lgrp_id) { 2818 break; 2819 } 2820 } 2821 } else { 2822 return NULL; 2823 } 2824 } 2825 2826 if (i != addrs_count) { 2827 if ((validity[i] & 2) != 0) { 2828 page_found->lgrp_id = outdata[types * i]; 2829 } else { 2830 page_found->lgrp_id = -1; 2831 } 2832 if ((validity[i] & 4) != 0) { 2833 page_found->size = outdata[types * i + 1]; 2834 } else { 2835 page_found->size = 0; 2836 } 2837 return (char*)addrs[i]; 2838 } 2839 2840 p = addrs[addrs_count - 1] + page_size; 2841 } 2842 return end; 2843} 2844 2845bool os::uncommit_memory(char* addr, size_t bytes) { 2846 size_t size = bytes; 2847 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2848 // uncommitted page. Otherwise, the read/write might succeed if we 2849 // have enough swap space to back the physical page. 2850 return 2851 NULL != Solaris::mmap_chunk(addr, size, 2852 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2853 PROT_NONE); 2854} 2855 2856char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2857 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2858 2859 if (b == MAP_FAILED) { 2860 return NULL; 2861 } 2862 return b; 2863} 2864 2865char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 2866 char* addr = requested_addr; 2867 int flags = MAP_PRIVATE | MAP_NORESERVE; 2868 2869 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 2870 2871 if (fixed) { 2872 flags |= MAP_FIXED; 2873 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2874 flags |= MAP_ALIGN; 2875 addr = (char*) alignment_hint; 2876 } 2877 2878 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2879 // uncommitted page. Otherwise, the read/write might succeed if we 2880 // have enough swap space to back the physical page. 2881 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2882} 2883 2884char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 2885 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 2886 2887 guarantee(requested_addr == NULL || requested_addr == addr, 2888 "OS failed to return requested mmap address."); 2889 return addr; 2890} 2891 2892// Reserve memory at an arbitrary address, only if that area is 2893// available (and not reserved for something else). 2894 2895char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2896 const int max_tries = 10; 2897 char* base[max_tries]; 2898 size_t size[max_tries]; 2899 2900 // Solaris adds a gap between mmap'ed regions. The size of the gap 2901 // is dependent on the requested size and the MMU. Our initial gap 2902 // value here is just a guess and will be corrected later. 2903 bool had_top_overlap = false; 2904 bool have_adjusted_gap = false; 2905 size_t gap = 0x400000; 2906 2907 // Assert only that the size is a multiple of the page size, since 2908 // that's all that mmap requires, and since that's all we really know 2909 // about at this low abstraction level. If we need higher alignment, 2910 // we can either pass an alignment to this method or verify alignment 2911 // in one of the methods further up the call chain. See bug 5044738. 2912 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2913 2914 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2915 // Give it a try, if the kernel honors the hint we can return immediately. 2916 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2917 volatile int err = errno; 2918 if (addr == requested_addr) { 2919 return addr; 2920 } else if (addr != NULL) { 2921 unmap_memory(addr, bytes); 2922 } 2923 2924 if (PrintMiscellaneous && Verbose) { 2925 char buf[256]; 2926 buf[0] = '\0'; 2927 if (addr == NULL) { 2928 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2929 } 2930 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " 2931 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2932 "%s", bytes, requested_addr, addr, buf); 2933 } 2934 2935 // Address hint method didn't work. Fall back to the old method. 2936 // In theory, once SNV becomes our oldest supported platform, this 2937 // code will no longer be needed. 2938 // 2939 // Repeatedly allocate blocks until the block is allocated at the 2940 // right spot. Give up after max_tries. 2941 int i; 2942 for (i = 0; i < max_tries; ++i) { 2943 base[i] = reserve_memory(bytes); 2944 2945 if (base[i] != NULL) { 2946 // Is this the block we wanted? 2947 if (base[i] == requested_addr) { 2948 size[i] = bytes; 2949 break; 2950 } 2951 2952 // check that the gap value is right 2953 if (had_top_overlap && !have_adjusted_gap) { 2954 size_t actual_gap = base[i-1] - base[i] - bytes; 2955 if (gap != actual_gap) { 2956 // adjust the gap value and retry the last 2 allocations 2957 assert(i > 0, "gap adjustment code problem"); 2958 have_adjusted_gap = true; // adjust the gap only once, just in case 2959 gap = actual_gap; 2960 if (PrintMiscellaneous && Verbose) { 2961 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2962 } 2963 unmap_memory(base[i], bytes); 2964 unmap_memory(base[i-1], size[i-1]); 2965 i-=2; 2966 continue; 2967 } 2968 } 2969 2970 // Does this overlap the block we wanted? Give back the overlapped 2971 // parts and try again. 2972 // 2973 // There is still a bug in this code: if top_overlap == bytes, 2974 // the overlap is offset from requested region by the value of gap. 2975 // In this case giving back the overlapped part will not work, 2976 // because we'll give back the entire block at base[i] and 2977 // therefore the subsequent allocation will not generate a new gap. 2978 // This could be fixed with a new algorithm that used larger 2979 // or variable size chunks to find the requested region - 2980 // but such a change would introduce additional complications. 2981 // It's rare enough that the planets align for this bug, 2982 // so we'll just wait for a fix for 6204603/5003415 which 2983 // will provide a mmap flag to allow us to avoid this business. 2984 2985 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2986 if (top_overlap >= 0 && top_overlap < bytes) { 2987 had_top_overlap = true; 2988 unmap_memory(base[i], top_overlap); 2989 base[i] += top_overlap; 2990 size[i] = bytes - top_overlap; 2991 } else { 2992 size_t bottom_overlap = base[i] + bytes - requested_addr; 2993 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2994 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2995 warning("attempt_reserve_memory_at: possible alignment bug"); 2996 } 2997 unmap_memory(requested_addr, bottom_overlap); 2998 size[i] = bytes - bottom_overlap; 2999 } else { 3000 size[i] = bytes; 3001 } 3002 } 3003 } 3004 } 3005 3006 // Give back the unused reserved pieces. 3007 3008 for (int j = 0; j < i; ++j) { 3009 if (base[j] != NULL) { 3010 unmap_memory(base[j], size[j]); 3011 } 3012 } 3013 3014 return (i < max_tries) ? requested_addr : NULL; 3015} 3016 3017bool os::release_memory(char* addr, size_t bytes) { 3018 size_t size = bytes; 3019 return munmap(addr, size) == 0; 3020} 3021 3022static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3023 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3024 "addr must be page aligned"); 3025 int retVal = mprotect(addr, bytes, prot); 3026 return retVal == 0; 3027} 3028 3029// Protect memory (Used to pass readonly pages through 3030// JNI GetArray<type>Elements with empty arrays.) 3031bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3032 bool is_committed) { 3033 unsigned int p = 0; 3034 switch (prot) { 3035 case MEM_PROT_NONE: p = PROT_NONE; break; 3036 case MEM_PROT_READ: p = PROT_READ; break; 3037 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3038 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3039 default: 3040 ShouldNotReachHere(); 3041 } 3042 // is_committed is unused. 3043 return solaris_mprotect(addr, bytes, p); 3044} 3045 3046// guard_memory and unguard_memory only happens within stack guard pages. 3047// Since ISM pertains only to the heap, guard and unguard memory should not 3048/// happen with an ISM region. 3049bool os::guard_memory(char* addr, size_t bytes) { 3050 return solaris_mprotect(addr, bytes, PROT_NONE); 3051} 3052 3053bool os::unguard_memory(char* addr, size_t bytes) { 3054 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC); 3055} 3056 3057// Large page support 3058 3059// UseLargePages is the master flag to enable/disable large page memory. 3060// UseMPSS and UseISM are supported for compatibility reasons. Their combined 3061// effects can be described in the following table: 3062// 3063// UseLargePages UseMPSS UseISM 3064// false * * => UseLargePages is the master switch, turning 3065// it off will turn off both UseMPSS and 3066// UseISM. VM will not use large page memory 3067// regardless the settings of UseMPSS/UseISM. 3068// true false false => Unless future Solaris provides other 3069// mechanism to use large page memory, this 3070// combination is equivalent to -UseLargePages, 3071// VM will not use large page memory 3072// true true false => JVM will use MPSS for large page memory. 3073// This is the default behavior. 3074// true false true => JVM will use ISM for large page memory. 3075// true true true => JVM will use ISM if it is available. 3076// Otherwise, JVM will fall back to MPSS. 3077// Becaues ISM is now available on all 3078// supported Solaris versions, this combination 3079// is equivalent to +UseISM -UseMPSS. 3080 3081typedef int (*getpagesizes_func_type) (size_t[], int); 3082static size_t _large_page_size = 0; 3083 3084bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3085 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3086 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3087 // can support multiple page sizes. 3088 3089 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3090 // ISM is only recommended on old Solaris where there is no MPSS support. 3091 // Simply choose a conservative value as default. 3092 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3093 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); 3094 3095 // ISM is available on all supported Solaris versions 3096 return true; 3097} 3098 3099// Insertion sort for small arrays (descending order). 3100static void insertion_sort_descending(size_t* array, int len) { 3101 for (int i = 0; i < len; i++) { 3102 size_t val = array[i]; 3103 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3104 size_t tmp = array[key]; 3105 array[key] = array[key - 1]; 3106 array[key - 1] = tmp; 3107 } 3108 } 3109} 3110 3111bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3112 getpagesizes_func_type getpagesizes_func = 3113 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3114 if (getpagesizes_func == NULL) { 3115 if (warn) { 3116 warning("MPSS is not supported by the operating system."); 3117 } 3118 return false; 3119 } 3120 3121 const unsigned int usable_count = VM_Version::page_size_count(); 3122 if (usable_count == 1) { 3123 return false; 3124 } 3125 3126 // Fill the array of page sizes. 3127 int n = getpagesizes_func(_page_sizes, page_sizes_max); 3128 assert(n > 0, "Solaris bug?"); 3129 if (n == page_sizes_max) { 3130 // Add a sentinel value (necessary only if the array was completely filled 3131 // since it is static (zeroed at initialization)). 3132 _page_sizes[--n] = 0; 3133 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3134 } 3135 assert(_page_sizes[n] == 0, "missing sentinel"); 3136 3137 if (n == 1) return false; // Only one page size available. 3138 3139 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3140 // select up to usable_count elements. First sort the array, find the first 3141 // acceptable value, then copy the usable sizes to the top of the array and 3142 // trim the rest. Make sure to include the default page size :-). 3143 // 3144 // A better policy could get rid of the 4M limit by taking the sizes of the 3145 // important VM memory regions (java heap and possibly the code cache) into 3146 // account. 3147 insertion_sort_descending(_page_sizes, n); 3148 const size_t size_limit = 3149 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3150 int beg; 3151 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3152 const int end = MIN2((int)usable_count, n) - 1; 3153 for (int cur = 0; cur < end; ++cur, ++beg) { 3154 _page_sizes[cur] = _page_sizes[beg]; 3155 } 3156 _page_sizes[end] = vm_page_size(); 3157 _page_sizes[end + 1] = 0; 3158 3159 if (_page_sizes[end] > _page_sizes[end - 1]) { 3160 // Default page size is not the smallest; sort again. 3161 insertion_sort_descending(_page_sizes, end + 1); 3162 } 3163 *page_size = _page_sizes[0]; 3164 3165 return true; 3166} 3167 3168bool os::large_page_init() { 3169 if (!UseLargePages) { 3170 UseISM = false; 3171 UseMPSS = false; 3172 return false; 3173 } 3174 3175 // print a warning if any large page related flag is specified on command line 3176 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3177 !FLAG_IS_DEFAULT(UseISM) || 3178 !FLAG_IS_DEFAULT(UseMPSS) || 3179 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3180 UseISM = UseISM && 3181 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3182 if (UseISM) { 3183 // ISM disables MPSS to be compatible with old JDK behavior 3184 UseMPSS = false; 3185 _page_sizes[0] = _large_page_size; 3186 _page_sizes[1] = vm_page_size(); 3187 } 3188 3189 UseMPSS = UseMPSS && 3190 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3191 3192 UseLargePages = UseISM || UseMPSS; 3193 return UseLargePages; 3194} 3195 3196bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3197 // Signal to OS that we want large pages for addresses 3198 // from addr, addr + bytes 3199 struct memcntl_mha mpss_struct; 3200 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3201 mpss_struct.mha_pagesize = align; 3202 mpss_struct.mha_flags = 0; 3203 if (memcntl(start, bytes, MC_HAT_ADVISE, 3204 (caddr_t) &mpss_struct, 0, 0) < 0) { 3205 debug_only(warning("Attempt to use MPSS failed.")); 3206 return false; 3207 } 3208 return true; 3209} 3210 3211char* os::reserve_memory_special(size_t bytes) { 3212 assert(UseLargePages && UseISM, "only for ISM large pages"); 3213 3214 size_t size = bytes; 3215 char* retAddr = NULL; 3216 int shmid; 3217 key_t ismKey; 3218 3219 bool warn_on_failure = UseISM && 3220 (!FLAG_IS_DEFAULT(UseLargePages) || 3221 !FLAG_IS_DEFAULT(UseISM) || 3222 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3223 ); 3224 char msg[128]; 3225 3226 ismKey = IPC_PRIVATE; 3227 3228 // Create a large shared memory region to attach to based on size. 3229 // Currently, size is the total size of the heap 3230 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3231 if (shmid == -1){ 3232 if (warn_on_failure) { 3233 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3234 warning(msg); 3235 } 3236 return NULL; 3237 } 3238 3239 // Attach to the region 3240 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3241 int err = errno; 3242 3243 // Remove shmid. If shmat() is successful, the actual shared memory segment 3244 // will be deleted when it's detached by shmdt() or when the process 3245 // terminates. If shmat() is not successful this will remove the shared 3246 // segment immediately. 3247 shmctl(shmid, IPC_RMID, NULL); 3248 3249 if (retAddr == (char *) -1) { 3250 if (warn_on_failure) { 3251 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3252 warning(msg); 3253 } 3254 return NULL; 3255 } 3256 3257 return retAddr; 3258} 3259 3260bool os::release_memory_special(char* base, size_t bytes) { 3261 // detaching the SHM segment will also delete it, see reserve_memory_special() 3262 int rslt = shmdt(base); 3263 return rslt == 0; 3264} 3265 3266size_t os::large_page_size() { 3267 return _large_page_size; 3268} 3269 3270// MPSS allows application to commit large page memory on demand; with ISM 3271// the entire memory region must be allocated as shared memory. 3272bool os::can_commit_large_page_memory() { 3273 return UseISM ? false : true; 3274} 3275 3276bool os::can_execute_large_page_memory() { 3277 return UseISM ? false : true; 3278} 3279 3280static int os_sleep(jlong millis, bool interruptible) { 3281 const jlong limit = INT_MAX; 3282 jlong prevtime; 3283 int res; 3284 3285 while (millis > limit) { 3286 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3287 return res; 3288 millis -= limit; 3289 } 3290 3291 // Restart interrupted polls with new parameters until the proper delay 3292 // has been completed. 3293 3294 prevtime = getTimeMillis(); 3295 3296 while (millis > 0) { 3297 jlong newtime; 3298 3299 if (!interruptible) { 3300 // Following assert fails for os::yield_all: 3301 // assert(!thread->is_Java_thread(), "must not be java thread"); 3302 res = poll(NULL, 0, millis); 3303 } else { 3304 JavaThread *jt = JavaThread::current(); 3305 3306 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3307 os::Solaris::clear_interrupted); 3308 } 3309 3310 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3311 // thread.Interrupt. 3312 3313 if((res == OS_ERR) && (errno == EINTR)) { 3314 newtime = getTimeMillis(); 3315 assert(newtime >= prevtime, "time moving backwards"); 3316 /* Doing prevtime and newtime in microseconds doesn't help precision, 3317 and trying to round up to avoid lost milliseconds can result in a 3318 too-short delay. */ 3319 millis -= newtime - prevtime; 3320 if(millis <= 0) 3321 return OS_OK; 3322 prevtime = newtime; 3323 } else 3324 return res; 3325 } 3326 3327 return OS_OK; 3328} 3329 3330// Read calls from inside the vm need to perform state transitions 3331size_t os::read(int fd, void *buf, unsigned int nBytes) { 3332 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3333} 3334 3335int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3336 assert(thread == Thread::current(), "thread consistency check"); 3337 3338 // TODO-FIXME: this should be removed. 3339 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3340 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3341 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3342 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3343 // is fooled into believing that the system is making progress. In the code below we block the 3344 // the watcher thread while safepoint is in progress so that it would not appear as though the 3345 // system is making progress. 3346 if (!Solaris::T2_libthread() && 3347 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3348 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3349 // the entire safepoint, the watcher thread will line up here during the safepoint. 3350 Threads_lock->lock_without_safepoint_check(); 3351 Threads_lock->unlock(); 3352 } 3353 3354 if (thread->is_Java_thread()) { 3355 // This is a JavaThread so we honor the _thread_blocked protocol 3356 // even for sleeps of 0 milliseconds. This was originally done 3357 // as a workaround for bug 4338139. However, now we also do it 3358 // to honor the suspend-equivalent protocol. 3359 3360 JavaThread *jt = (JavaThread *) thread; 3361 ThreadBlockInVM tbivm(jt); 3362 3363 jt->set_suspend_equivalent(); 3364 // cleared by handle_special_suspend_equivalent_condition() or 3365 // java_suspend_self() via check_and_wait_while_suspended() 3366 3367 int ret_code; 3368 if (millis <= 0) { 3369 thr_yield(); 3370 ret_code = 0; 3371 } else { 3372 // The original sleep() implementation did not create an 3373 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3374 // I'm preserving that decision for now. 3375 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3376 3377 ret_code = os_sleep(millis, interruptible); 3378 } 3379 3380 // were we externally suspended while we were waiting? 3381 jt->check_and_wait_while_suspended(); 3382 3383 return ret_code; 3384 } 3385 3386 // non-JavaThread from this point on: 3387 3388 if (millis <= 0) { 3389 thr_yield(); 3390 return 0; 3391 } 3392 3393 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3394 3395 return os_sleep(millis, interruptible); 3396} 3397 3398int os::naked_sleep() { 3399 // %% make the sleep time an integer flag. for now use 1 millisec. 3400 return os_sleep(1, false); 3401} 3402 3403// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3404void os::infinite_sleep() { 3405 while (true) { // sleep forever ... 3406 ::sleep(100); // ... 100 seconds at a time 3407 } 3408} 3409 3410// Used to convert frequent JVM_Yield() to nops 3411bool os::dont_yield() { 3412 if (DontYieldALot) { 3413 static hrtime_t last_time = 0; 3414 hrtime_t diff = getTimeNanos() - last_time; 3415 3416 if (diff < DontYieldALotInterval * 1000000) 3417 return true; 3418 3419 last_time += diff; 3420 3421 return false; 3422 } 3423 else { 3424 return false; 3425 } 3426} 3427 3428// Caveat: Solaris os::yield() causes a thread-state transition whereas 3429// the linux and win32 implementations do not. This should be checked. 3430 3431void os::yield() { 3432 // Yields to all threads with same or greater priority 3433 os::sleep(Thread::current(), 0, false); 3434} 3435 3436// Note that yield semantics are defined by the scheduling class to which 3437// the thread currently belongs. Typically, yield will _not yield to 3438// other equal or higher priority threads that reside on the dispatch queues 3439// of other CPUs. 3440 3441os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3442 3443 3444// On Solaris we found that yield_all doesn't always yield to all other threads. 3445// There have been cases where there is a thread ready to execute but it doesn't 3446// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3447// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3448// SIGWAITING signal which will cause a new lwp to be created. So we count the 3449// number of times yield_all is called in the one loop and increase the sleep 3450// time after 8 attempts. If this fails too we increase the concurrency level 3451// so that the starving thread would get an lwp 3452 3453void os::yield_all(int attempts) { 3454 // Yields to all threads, including threads with lower priorities 3455 if (attempts == 0) { 3456 os::sleep(Thread::current(), 1, false); 3457 } else { 3458 int iterations = attempts % 30; 3459 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3460 // thr_setconcurrency and _getconcurrency make sense only under T1. 3461 int noofLWPS = thr_getconcurrency(); 3462 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3463 thr_setconcurrency(thr_getconcurrency() + 1); 3464 } 3465 } else if (iterations < 25) { 3466 os::sleep(Thread::current(), 1, false); 3467 } else { 3468 os::sleep(Thread::current(), 10, false); 3469 } 3470 } 3471} 3472 3473// Called from the tight loops to possibly influence time-sharing heuristics 3474void os::loop_breaker(int attempts) { 3475 os::yield_all(attempts); 3476} 3477 3478 3479// Interface for setting lwp priorities. If we are using T2 libthread, 3480// which forces the use of BoundThreads or we manually set UseBoundThreads, 3481// all of our threads will be assigned to real lwp's. Using the thr_setprio 3482// function is meaningless in this mode so we must adjust the real lwp's priority 3483// The routines below implement the getting and setting of lwp priorities. 3484// 3485// Note: There are three priority scales used on Solaris. Java priotities 3486// which range from 1 to 10, libthread "thr_setprio" scale which range 3487// from 0 to 127, and the current scheduling class of the process we 3488// are running in. This is typically from -60 to +60. 3489// The setting of the lwp priorities in done after a call to thr_setprio 3490// so Java priorities are mapped to libthread priorities and we map from 3491// the latter to lwp priorities. We don't keep priorities stored in 3492// Java priorities since some of our worker threads want to set priorities 3493// higher than all Java threads. 3494// 3495// For related information: 3496// (1) man -s 2 priocntl 3497// (2) man -s 4 priocntl 3498// (3) man dispadmin 3499// = librt.so 3500// = libthread/common/rtsched.c - thrp_setlwpprio(). 3501// = ps -cL <pid> ... to validate priority. 3502// = sched_get_priority_min and _max 3503// pthread_create 3504// sched_setparam 3505// pthread_setschedparam 3506// 3507// Assumptions: 3508// + We assume that all threads in the process belong to the same 3509// scheduling class. IE. an homogenous process. 3510// + Must be root or in IA group to change change "interactive" attribute. 3511// Priocntl() will fail silently. The only indication of failure is when 3512// we read-back the value and notice that it hasn't changed. 3513// + Interactive threads enter the runq at the head, non-interactive at the tail. 3514// + For RT, change timeslice as well. Invariant: 3515// constant "priority integral" 3516// Konst == TimeSlice * (60-Priority) 3517// Given a priority, compute appropriate timeslice. 3518// + Higher numerical values have higher priority. 3519 3520// sched class attributes 3521typedef struct { 3522 int schedPolicy; // classID 3523 int maxPrio; 3524 int minPrio; 3525} SchedInfo; 3526 3527 3528static SchedInfo tsLimits, iaLimits, rtLimits; 3529 3530#ifdef ASSERT 3531static int ReadBackValidate = 1; 3532#endif 3533static int myClass = 0; 3534static int myMin = 0; 3535static int myMax = 0; 3536static int myCur = 0; 3537static bool priocntl_enable = false; 3538 3539 3540// Call the version of priocntl suitable for all supported versions 3541// of Solaris. We need to call through this wrapper so that we can 3542// build on Solaris 9 and run on Solaris 8, 9 and 10. 3543// 3544// This code should be removed if we ever stop supporting Solaris 8 3545// and earlier releases. 3546 3547static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3548typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3549static priocntl_type priocntl_ptr = priocntl_stub; 3550 3551// Stub to set the value of the real pointer, and then call the real 3552// function. 3553 3554static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3555 // Try Solaris 8- name only. 3556 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3557 guarantee(tmp != NULL, "priocntl function not found."); 3558 priocntl_ptr = tmp; 3559 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3560} 3561 3562 3563// lwp_priocntl_init 3564// 3565// Try to determine the priority scale for our process. 3566// 3567// Return errno or 0 if OK. 3568// 3569static 3570int lwp_priocntl_init () 3571{ 3572 int rslt; 3573 pcinfo_t ClassInfo; 3574 pcparms_t ParmInfo; 3575 int i; 3576 3577 if (!UseThreadPriorities) return 0; 3578 3579 // We are using Bound threads, we need to determine our priority ranges 3580 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3581 // If ThreadPriorityPolicy is 1, switch tables 3582 if (ThreadPriorityPolicy == 1) { 3583 for (i = 0 ; i < MaxPriority+1; i++) 3584 os::java_to_os_priority[i] = prio_policy1[i]; 3585 } 3586 } 3587 // Not using Bound Threads, set to ThreadPolicy 1 3588 else { 3589 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3590 os::java_to_os_priority[i] = prio_policy1[i]; 3591 } 3592 return 0; 3593 } 3594 3595 3596 // Get IDs for a set of well-known scheduling classes. 3597 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3598 // the system. We should have a loop that iterates over the 3599 // classID values, which are known to be "small" integers. 3600 3601 strcpy(ClassInfo.pc_clname, "TS"); 3602 ClassInfo.pc_cid = -1; 3603 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3604 if (rslt < 0) return errno; 3605 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3606 tsLimits.schedPolicy = ClassInfo.pc_cid; 3607 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3608 tsLimits.minPrio = -tsLimits.maxPrio; 3609 3610 strcpy(ClassInfo.pc_clname, "IA"); 3611 ClassInfo.pc_cid = -1; 3612 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3613 if (rslt < 0) return errno; 3614 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3615 iaLimits.schedPolicy = ClassInfo.pc_cid; 3616 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3617 iaLimits.minPrio = -iaLimits.maxPrio; 3618 3619 strcpy(ClassInfo.pc_clname, "RT"); 3620 ClassInfo.pc_cid = -1; 3621 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3622 if (rslt < 0) return errno; 3623 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3624 rtLimits.schedPolicy = ClassInfo.pc_cid; 3625 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3626 rtLimits.minPrio = 0; 3627 3628 3629 // Query our "current" scheduling class. 3630 // This will normally be IA,TS or, rarely, RT. 3631 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3632 ParmInfo.pc_cid = PC_CLNULL; 3633 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3634 if ( rslt < 0 ) return errno; 3635 myClass = ParmInfo.pc_cid; 3636 3637 // We now know our scheduling classId, get specific information 3638 // the class. 3639 ClassInfo.pc_cid = myClass; 3640 ClassInfo.pc_clname[0] = 0; 3641 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3642 if ( rslt < 0 ) return errno; 3643 3644 if (ThreadPriorityVerbose) 3645 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3646 3647 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3648 ParmInfo.pc_cid = PC_CLNULL; 3649 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3650 if (rslt < 0) return errno; 3651 3652 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3653 myMin = rtLimits.minPrio; 3654 myMax = rtLimits.maxPrio; 3655 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3656 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3657 myMin = iaLimits.minPrio; 3658 myMax = iaLimits.maxPrio; 3659 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3660 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3661 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3662 myMin = tsLimits.minPrio; 3663 myMax = tsLimits.maxPrio; 3664 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3665 } else { 3666 // No clue - punt 3667 if (ThreadPriorityVerbose) 3668 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3669 return EINVAL; // no clue, punt 3670 } 3671 3672 if (ThreadPriorityVerbose) 3673 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3674 3675 priocntl_enable = true; // Enable changing priorities 3676 return 0; 3677} 3678 3679#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3680#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3681#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3682 3683 3684// scale_to_lwp_priority 3685// 3686// Convert from the libthread "thr_setprio" scale to our current 3687// lwp scheduling class scale. 3688// 3689static 3690int scale_to_lwp_priority (int rMin, int rMax, int x) 3691{ 3692 int v; 3693 3694 if (x == 127) return rMax; // avoid round-down 3695 v = (((x*(rMax-rMin)))/128)+rMin; 3696 return v; 3697} 3698 3699 3700// set_lwp_priority 3701// 3702// Set the priority of the lwp. This call should only be made 3703// when using bound threads (T2 threads are bound by default). 3704// 3705int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3706{ 3707 int rslt; 3708 int Actual, Expected, prv; 3709 pcparms_t ParmInfo; // for GET-SET 3710#ifdef ASSERT 3711 pcparms_t ReadBack; // for readback 3712#endif 3713 3714 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3715 // Query current values. 3716 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3717 // Cache "pcparms_t" in global ParmCache. 3718 // TODO: elide set-to-same-value 3719 3720 // If something went wrong on init, don't change priorities. 3721 if ( !priocntl_enable ) { 3722 if (ThreadPriorityVerbose) 3723 tty->print_cr("Trying to set priority but init failed, ignoring"); 3724 return EINVAL; 3725 } 3726 3727 3728 // If lwp hasn't started yet, just return 3729 // the _start routine will call us again. 3730 if ( lwpid <= 0 ) { 3731 if (ThreadPriorityVerbose) { 3732 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3733 ThreadID, newPrio); 3734 } 3735 return 0; 3736 } 3737 3738 if (ThreadPriorityVerbose) { 3739 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3740 ThreadID, lwpid, newPrio); 3741 } 3742 3743 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3744 ParmInfo.pc_cid = PC_CLNULL; 3745 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3746 if (rslt < 0) return errno; 3747 3748 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3749 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3750 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3751 rtInfo->rt_tqsecs = RT_NOCHANGE; 3752 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3753 if (ThreadPriorityVerbose) { 3754 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3755 } 3756 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3757 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3758 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3759 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3760 iaInfo->ia_uprilim = IA_NOCHANGE; 3761// iaInfo->ia_nice = IA_NOCHANGE; 3762 iaInfo->ia_mode = IA_NOCHANGE; 3763 if (ThreadPriorityVerbose) { 3764 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3765 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3766 } 3767 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3768 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3769 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3770 prv = tsInfo->ts_upri; 3771 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3772 tsInfo->ts_uprilim = IA_NOCHANGE; 3773 if (ThreadPriorityVerbose) { 3774 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3775 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3776 } 3777 if (prv == tsInfo->ts_upri) return 0; 3778 } else { 3779 if ( ThreadPriorityVerbose ) { 3780 tty->print_cr ("Unknown scheduling class\n"); 3781 } 3782 return EINVAL; // no clue, punt 3783 } 3784 3785 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3786 if (ThreadPriorityVerbose && rslt) { 3787 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3788 } 3789 if (rslt < 0) return errno; 3790 3791#ifdef ASSERT 3792 // Sanity check: read back what we just attempted to set. 3793 // In theory it could have changed in the interim ... 3794 // 3795 // The priocntl system call is tricky. 3796 // Sometimes it'll validate the priority value argument and 3797 // return EINVAL if unhappy. At other times it fails silently. 3798 // Readbacks are prudent. 3799 3800 if (!ReadBackValidate) return 0; 3801 3802 memset(&ReadBack, 0, sizeof(pcparms_t)); 3803 ReadBack.pc_cid = PC_CLNULL; 3804 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3805 assert(rslt >= 0, "priocntl failed"); 3806 Actual = Expected = 0xBAD; 3807 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3808 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3809 Actual = RTPRI(ReadBack)->rt_pri; 3810 Expected = RTPRI(ParmInfo)->rt_pri; 3811 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3812 Actual = IAPRI(ReadBack)->ia_upri; 3813 Expected = IAPRI(ParmInfo)->ia_upri; 3814 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3815 Actual = TSPRI(ReadBack)->ts_upri; 3816 Expected = TSPRI(ParmInfo)->ts_upri; 3817 } else { 3818 if ( ThreadPriorityVerbose ) { 3819 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3820 } 3821 } 3822 3823 if (Actual != Expected) { 3824 if ( ThreadPriorityVerbose ) { 3825 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3826 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3827 } 3828 } 3829#endif 3830 3831 return 0; 3832} 3833 3834 3835 3836// Solaris only gives access to 128 real priorities at a time, 3837// so we expand Java's ten to fill this range. This would be better 3838// if we dynamically adjusted relative priorities. 3839// 3840// The ThreadPriorityPolicy option allows us to select 2 different 3841// priority scales. 3842// 3843// ThreadPriorityPolicy=0 3844// Since the Solaris' default priority is MaximumPriority, we do not 3845// set a priority lower than Max unless a priority lower than 3846// NormPriority is requested. 3847// 3848// ThreadPriorityPolicy=1 3849// This mode causes the priority table to get filled with 3850// linear values. NormPriority get's mapped to 50% of the 3851// Maximum priority an so on. This will cause VM threads 3852// to get unfair treatment against other Solaris processes 3853// which do not explicitly alter their thread priorities. 3854// 3855 3856 3857int os::java_to_os_priority[MaxPriority + 1] = { 3858 -99999, // 0 Entry should never be used 3859 3860 0, // 1 MinPriority 3861 32, // 2 3862 64, // 3 3863 3864 96, // 4 3865 127, // 5 NormPriority 3866 127, // 6 3867 3868 127, // 7 3869 127, // 8 3870 127, // 9 NearMaxPriority 3871 3872 127 // 10 MaxPriority 3873}; 3874 3875 3876OSReturn os::set_native_priority(Thread* thread, int newpri) { 3877 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3878 if ( !UseThreadPriorities ) return OS_OK; 3879 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 3880 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 3881 status |= (set_lwp_priority (thread->osthread()->thread_id(), 3882 thread->osthread()->lwp_id(), newpri )); 3883 return (status == 0) ? OS_OK : OS_ERR; 3884} 3885 3886 3887OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 3888 int p; 3889 if ( !UseThreadPriorities ) { 3890 *priority_ptr = NormalPriority; 3891 return OS_OK; 3892 } 3893 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3894 if (status != 0) { 3895 return OS_ERR; 3896 } 3897 *priority_ptr = p; 3898 return OS_OK; 3899} 3900 3901 3902// Hint to the underlying OS that a task switch would not be good. 3903// Void return because it's a hint and can fail. 3904void os::hint_no_preempt() { 3905 schedctl_start(schedctl_init()); 3906} 3907 3908void os::interrupt(Thread* thread) { 3909 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3910 3911 OSThread* osthread = thread->osthread(); 3912 3913 int isInterrupted = osthread->interrupted(); 3914 if (!isInterrupted) { 3915 osthread->set_interrupted(true); 3916 OrderAccess::fence(); 3917 // os::sleep() is implemented with either poll (NULL,0,timeout) or 3918 // by parking on _SleepEvent. If the former, thr_kill will unwedge 3919 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 3920 ParkEvent * const slp = thread->_SleepEvent ; 3921 if (slp != NULL) slp->unpark() ; 3922 } 3923 3924 // For JSR166: unpark after setting status but before thr_kill -dl 3925 if (thread->is_Java_thread()) { 3926 ((JavaThread*)thread)->parker()->unpark(); 3927 } 3928 3929 // Handle interruptible wait() ... 3930 ParkEvent * const ev = thread->_ParkEvent ; 3931 if (ev != NULL) ev->unpark() ; 3932 3933 // When events are used everywhere for os::sleep, then this thr_kill 3934 // will only be needed if UseVMInterruptibleIO is true. 3935 3936 if (!isInterrupted) { 3937 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 3938 assert_status(status == 0, status, "thr_kill"); 3939 3940 // Bump thread interruption counter 3941 RuntimeService::record_thread_interrupt_signaled_count(); 3942 } 3943} 3944 3945 3946bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3947 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3948 3949 OSThread* osthread = thread->osthread(); 3950 3951 bool res = osthread->interrupted(); 3952 3953 // NOTE that since there is no "lock" around these two operations, 3954 // there is the possibility that the interrupted flag will be 3955 // "false" but that the interrupt event will be set. This is 3956 // intentional. The effect of this is that Object.wait() will appear 3957 // to have a spurious wakeup, which is not harmful, and the 3958 // possibility is so rare that it is not worth the added complexity 3959 // to add yet another lock. It has also been recommended not to put 3960 // the interrupted flag into the os::Solaris::Event structure, 3961 // because it hides the issue. 3962 if (res && clear_interrupted) { 3963 osthread->set_interrupted(false); 3964 } 3965 return res; 3966} 3967 3968 3969void os::print_statistics() { 3970} 3971 3972int os::message_box(const char* title, const char* message) { 3973 int i; 3974 fdStream err(defaultStream::error_fd()); 3975 for (i = 0; i < 78; i++) err.print_raw("="); 3976 err.cr(); 3977 err.print_raw_cr(title); 3978 for (i = 0; i < 78; i++) err.print_raw("-"); 3979 err.cr(); 3980 err.print_raw_cr(message); 3981 for (i = 0; i < 78; i++) err.print_raw("="); 3982 err.cr(); 3983 3984 char buf[16]; 3985 // Prevent process from exiting upon "read error" without consuming all CPU 3986 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3987 3988 return buf[0] == 'y' || buf[0] == 'Y'; 3989} 3990 3991// A lightweight implementation that does not suspend the target thread and 3992// thus returns only a hint. Used for profiling only! 3993ExtendedPC os::get_thread_pc(Thread* thread) { 3994 // Make sure that it is called by the watcher and the Threads lock is owned. 3995 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3996 // For now, is only used to profile the VM Thread 3997 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3998 ExtendedPC epc; 3999 4000 GetThreadPC_Callback cb(ProfileVM_lock); 4001 OSThread *osthread = thread->osthread(); 4002 const int time_to_wait = 400; // 400ms wait for initial response 4003 int status = cb.interrupt(thread, time_to_wait); 4004 4005 if (cb.is_done() ) { 4006 epc = cb.addr(); 4007 } else { 4008 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 4009 osthread->thread_id(), status);); 4010 // epc is already NULL 4011 } 4012 return epc; 4013} 4014 4015 4016// This does not do anything on Solaris. This is basically a hook for being 4017// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4018void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4019 f(value, method, args, thread); 4020} 4021 4022// This routine may be used by user applications as a "hook" to catch signals. 4023// The user-defined signal handler must pass unrecognized signals to this 4024// routine, and if it returns true (non-zero), then the signal handler must 4025// return immediately. If the flag "abort_if_unrecognized" is true, then this 4026// routine will never retun false (zero), but instead will execute a VM panic 4027// routine kill the process. 4028// 4029// If this routine returns false, it is OK to call it again. This allows 4030// the user-defined signal handler to perform checks either before or after 4031// the VM performs its own checks. Naturally, the user code would be making 4032// a serious error if it tried to handle an exception (such as a null check 4033// or breakpoint) that the VM was generating for its own correct operation. 4034// 4035// This routine may recognize any of the following kinds of signals: 4036// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4037// os::Solaris::SIGasync 4038// It should be consulted by handlers for any of those signals. 4039// It explicitly does not recognize os::Solaris::SIGinterrupt 4040// 4041// The caller of this routine must pass in the three arguments supplied 4042// to the function referred to in the "sa_sigaction" (not the "sa_handler") 4043// field of the structure passed to sigaction(). This routine assumes that 4044// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4045// 4046// Note that the VM will print warnings if it detects conflicting signal 4047// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4048// 4049extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 4050 4051 4052void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4053 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4054} 4055 4056/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4057 is needed to provoke threads blocked on IO to return an EINTR 4058 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4059 does NOT participate in signal chaining due to requirement for 4060 NOT setting SA_RESTART to make EINTR work. */ 4061extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4062 if (UseSignalChaining) { 4063 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4064 if (actp && actp->sa_handler) { 4065 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4066 } 4067 } 4068} 4069 4070// This boolean allows users to forward their own non-matching signals 4071// to JVM_handle_solaris_signal, harmlessly. 4072bool os::Solaris::signal_handlers_are_installed = false; 4073 4074// For signal-chaining 4075bool os::Solaris::libjsig_is_loaded = false; 4076typedef struct sigaction *(*get_signal_t)(int); 4077get_signal_t os::Solaris::get_signal_action = NULL; 4078 4079struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4080 struct sigaction *actp = NULL; 4081 4082 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4083 // Retrieve the old signal handler from libjsig 4084 actp = (*get_signal_action)(sig); 4085 } 4086 if (actp == NULL) { 4087 // Retrieve the preinstalled signal handler from jvm 4088 actp = get_preinstalled_handler(sig); 4089 } 4090 4091 return actp; 4092} 4093 4094static bool call_chained_handler(struct sigaction *actp, int sig, 4095 siginfo_t *siginfo, void *context) { 4096 // Call the old signal handler 4097 if (actp->sa_handler == SIG_DFL) { 4098 // It's more reasonable to let jvm treat it as an unexpected exception 4099 // instead of taking the default action. 4100 return false; 4101 } else if (actp->sa_handler != SIG_IGN) { 4102 if ((actp->sa_flags & SA_NODEFER) == 0) { 4103 // automaticlly block the signal 4104 sigaddset(&(actp->sa_mask), sig); 4105 } 4106 4107 sa_handler_t hand; 4108 sa_sigaction_t sa; 4109 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4110 // retrieve the chained handler 4111 if (siginfo_flag_set) { 4112 sa = actp->sa_sigaction; 4113 } else { 4114 hand = actp->sa_handler; 4115 } 4116 4117 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4118 actp->sa_handler = SIG_DFL; 4119 } 4120 4121 // try to honor the signal mask 4122 sigset_t oset; 4123 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4124 4125 // call into the chained handler 4126 if (siginfo_flag_set) { 4127 (*sa)(sig, siginfo, context); 4128 } else { 4129 (*hand)(sig); 4130 } 4131 4132 // restore the signal mask 4133 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4134 } 4135 // Tell jvm's signal handler the signal is taken care of. 4136 return true; 4137} 4138 4139bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4140 bool chained = false; 4141 // signal-chaining 4142 if (UseSignalChaining) { 4143 struct sigaction *actp = get_chained_signal_action(sig); 4144 if (actp != NULL) { 4145 chained = call_chained_handler(actp, sig, siginfo, context); 4146 } 4147 } 4148 return chained; 4149} 4150 4151struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4152 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4153 if (preinstalled_sigs[sig] != 0) { 4154 return &chainedsigactions[sig]; 4155 } 4156 return NULL; 4157} 4158 4159void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4160 4161 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4162 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4163 chainedsigactions[sig] = oldAct; 4164 preinstalled_sigs[sig] = 1; 4165} 4166 4167void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4168 // Check for overwrite. 4169 struct sigaction oldAct; 4170 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4171 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4172 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4173 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4174 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4175 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4176 if (AllowUserSignalHandlers || !set_installed) { 4177 // Do not overwrite; user takes responsibility to forward to us. 4178 return; 4179 } else if (UseSignalChaining) { 4180 if (oktochain) { 4181 // save the old handler in jvm 4182 save_preinstalled_handler(sig, oldAct); 4183 } else { 4184 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4185 } 4186 // libjsig also interposes the sigaction() call below and saves the 4187 // old sigaction on it own. 4188 } else { 4189 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); 4190 } 4191 } 4192 4193 struct sigaction sigAct; 4194 sigfillset(&(sigAct.sa_mask)); 4195 sigAct.sa_handler = SIG_DFL; 4196 4197 sigAct.sa_sigaction = signalHandler; 4198 // Handle SIGSEGV on alternate signal stack if 4199 // not using stack banging 4200 if (!UseStackBanging && sig == SIGSEGV) { 4201 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4202 // Interruptible i/o requires SA_RESTART cleared so EINTR 4203 // is returned instead of restarting system calls 4204 } else if (sig == os::Solaris::SIGinterrupt()) { 4205 sigemptyset(&sigAct.sa_mask); 4206 sigAct.sa_handler = NULL; 4207 sigAct.sa_flags = SA_SIGINFO; 4208 sigAct.sa_sigaction = sigINTRHandler; 4209 } else { 4210 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4211 } 4212 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4213 4214 sigaction(sig, &sigAct, &oldAct); 4215 4216 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4217 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4218 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4219} 4220 4221 4222#define DO_SIGNAL_CHECK(sig) \ 4223 if (!sigismember(&check_signal_done, sig)) \ 4224 os::Solaris::check_signal_handler(sig) 4225 4226// This method is a periodic task to check for misbehaving JNI applications 4227// under CheckJNI, we can add any periodic checks here 4228 4229void os::run_periodic_checks() { 4230 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4231 // thereby preventing a NULL checks. 4232 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4233 4234 if (check_signals == false) return; 4235 4236 // SEGV and BUS if overridden could potentially prevent 4237 // generation of hs*.log in the event of a crash, debugging 4238 // such a case can be very challenging, so we absolutely 4239 // check for the following for a good measure: 4240 DO_SIGNAL_CHECK(SIGSEGV); 4241 DO_SIGNAL_CHECK(SIGILL); 4242 DO_SIGNAL_CHECK(SIGFPE); 4243 DO_SIGNAL_CHECK(SIGBUS); 4244 DO_SIGNAL_CHECK(SIGPIPE); 4245 DO_SIGNAL_CHECK(SIGXFSZ); 4246 4247 // ReduceSignalUsage allows the user to override these handlers 4248 // see comments at the very top and jvm_solaris.h 4249 if (!ReduceSignalUsage) { 4250 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4251 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4252 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4253 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4254 } 4255 4256 // See comments above for using JVM1/JVM2 and UseAltSigs 4257 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4258 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4259 4260} 4261 4262typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4263 4264static os_sigaction_t os_sigaction = NULL; 4265 4266void os::Solaris::check_signal_handler(int sig) { 4267 char buf[O_BUFLEN]; 4268 address jvmHandler = NULL; 4269 4270 struct sigaction act; 4271 if (os_sigaction == NULL) { 4272 // only trust the default sigaction, in case it has been interposed 4273 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4274 if (os_sigaction == NULL) return; 4275 } 4276 4277 os_sigaction(sig, (struct sigaction*)NULL, &act); 4278 4279 address thisHandler = (act.sa_flags & SA_SIGINFO) 4280 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4281 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4282 4283 4284 switch(sig) { 4285 case SIGSEGV: 4286 case SIGBUS: 4287 case SIGFPE: 4288 case SIGPIPE: 4289 case SIGXFSZ: 4290 case SIGILL: 4291 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4292 break; 4293 4294 case SHUTDOWN1_SIGNAL: 4295 case SHUTDOWN2_SIGNAL: 4296 case SHUTDOWN3_SIGNAL: 4297 case BREAK_SIGNAL: 4298 jvmHandler = (address)user_handler(); 4299 break; 4300 4301 default: 4302 int intrsig = os::Solaris::SIGinterrupt(); 4303 int asynsig = os::Solaris::SIGasync(); 4304 4305 if (sig == intrsig) { 4306 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4307 } else if (sig == asynsig) { 4308 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4309 } else { 4310 return; 4311 } 4312 break; 4313 } 4314 4315 4316 if (thisHandler != jvmHandler) { 4317 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4318 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4319 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4320 // No need to check this sig any longer 4321 sigaddset(&check_signal_done, sig); 4322 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4323 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4324 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4325 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4326 // No need to check this sig any longer 4327 sigaddset(&check_signal_done, sig); 4328 } 4329 4330 // Print all the signal handler state 4331 if (sigismember(&check_signal_done, sig)) { 4332 print_signal_handlers(tty, buf, O_BUFLEN); 4333 } 4334 4335} 4336 4337void os::Solaris::install_signal_handlers() { 4338 bool libjsigdone = false; 4339 signal_handlers_are_installed = true; 4340 4341 // signal-chaining 4342 typedef void (*signal_setting_t)(); 4343 signal_setting_t begin_signal_setting = NULL; 4344 signal_setting_t end_signal_setting = NULL; 4345 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4346 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4347 if (begin_signal_setting != NULL) { 4348 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4349 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4350 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4351 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4352 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4353 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4354 libjsig_is_loaded = true; 4355 if (os::Solaris::get_libjsig_version != NULL) { 4356 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4357 } 4358 assert(UseSignalChaining, "should enable signal-chaining"); 4359 } 4360 if (libjsig_is_loaded) { 4361 // Tell libjsig jvm is setting signal handlers 4362 (*begin_signal_setting)(); 4363 } 4364 4365 set_signal_handler(SIGSEGV, true, true); 4366 set_signal_handler(SIGPIPE, true, true); 4367 set_signal_handler(SIGXFSZ, true, true); 4368 set_signal_handler(SIGBUS, true, true); 4369 set_signal_handler(SIGILL, true, true); 4370 set_signal_handler(SIGFPE, true, true); 4371 4372 4373 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4374 4375 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4376 // can not register overridable signals which might be > 32 4377 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4378 // Tell libjsig jvm has finished setting signal handlers 4379 (*end_signal_setting)(); 4380 libjsigdone = true; 4381 } 4382 } 4383 4384 // Never ok to chain our SIGinterrupt 4385 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4386 set_signal_handler(os::Solaris::SIGasync(), true, true); 4387 4388 if (libjsig_is_loaded && !libjsigdone) { 4389 // Tell libjsig jvm finishes setting signal handlers 4390 (*end_signal_setting)(); 4391 } 4392 4393 // We don't activate signal checker if libjsig is in place, we trust ourselves 4394 // and if UserSignalHandler is installed all bets are off 4395 if (CheckJNICalls) { 4396 if (libjsig_is_loaded) { 4397 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4398 check_signals = false; 4399 } 4400 if (AllowUserSignalHandlers) { 4401 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4402 check_signals = false; 4403 } 4404 } 4405} 4406 4407 4408void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4409 4410const char * signames[] = { 4411 "SIG0", 4412 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4413 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4414 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4415 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4416 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4417 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4418 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4419 "SIGCANCEL", "SIGLOST" 4420}; 4421 4422const char* os::exception_name(int exception_code, char* buf, size_t size) { 4423 if (0 < exception_code && exception_code <= SIGRTMAX) { 4424 // signal 4425 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4426 jio_snprintf(buf, size, "%s", signames[exception_code]); 4427 } else { 4428 jio_snprintf(buf, size, "SIG%d", exception_code); 4429 } 4430 return buf; 4431 } else { 4432 return NULL; 4433 } 4434} 4435 4436// (Static) wrappers for the new libthread API 4437int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4438int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4439int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4440int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4441int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4442 4443// (Static) wrappers for the liblgrp API 4444os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4445os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4446os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4447os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4448os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4449os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4450os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4451os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4452os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4453 4454// (Static) wrapper for meminfo() call. 4455os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4456 4457static address resolve_symbol(const char *name) { 4458 address addr; 4459 4460 addr = (address) dlsym(RTLD_DEFAULT, name); 4461 if(addr == NULL) { 4462 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4463 addr = (address) dlsym(RTLD_NEXT, name); 4464 if(addr == NULL) { 4465 fatal(dlerror()); 4466 } 4467 } 4468 return addr; 4469} 4470 4471 4472 4473// isT2_libthread() 4474// 4475// Routine to determine if we are currently using the new T2 libthread. 4476// 4477// We determine if we are using T2 by reading /proc/self/lstatus and 4478// looking for a thread with the ASLWP bit set. If we find this status 4479// bit set, we must assume that we are NOT using T2. The T2 team 4480// has approved this algorithm. 4481// 4482// We need to determine if we are running with the new T2 libthread 4483// since setting native thread priorities is handled differently 4484// when using this library. All threads created using T2 are bound 4485// threads. Calling thr_setprio is meaningless in this case. 4486// 4487bool isT2_libthread() { 4488 static prheader_t * lwpArray = NULL; 4489 static int lwpSize = 0; 4490 static int lwpFile = -1; 4491 lwpstatus_t * that; 4492 char lwpName [128]; 4493 bool isT2 = false; 4494 4495#define ADR(x) ((uintptr_t)(x)) 4496#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4497 4498 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); 4499 if (lwpFile < 0) { 4500 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4501 return false; 4502 } 4503 lwpSize = 16*1024; 4504 for (;;) { 4505 lseek (lwpFile, 0, SEEK_SET); 4506 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4507 if (read(lwpFile, lwpArray, lwpSize) < 0) { 4508 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4509 break; 4510 } 4511 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4512 // We got a good snapshot - now iterate over the list. 4513 int aslwpcount = 0; 4514 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4515 that = LWPINDEX(lwpArray,i); 4516 if (that->pr_flags & PR_ASLWP) { 4517 aslwpcount++; 4518 } 4519 } 4520 if (aslwpcount == 0) isT2 = true; 4521 break; 4522 } 4523 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4524 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4525 } 4526 4527 FREE_C_HEAP_ARRAY(char, lwpArray); 4528 close (lwpFile); 4529 if (ThreadPriorityVerbose) { 4530 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4531 else tty->print_cr("We are not running with a T2 libthread\n"); 4532 } 4533 return isT2; 4534} 4535 4536 4537void os::Solaris::libthread_init() { 4538 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4539 4540 // Determine if we are running with the new T2 libthread 4541 os::Solaris::set_T2_libthread(isT2_libthread()); 4542 4543 lwp_priocntl_init(); 4544 4545 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4546 if(func == NULL) { 4547 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4548 // Guarantee that this VM is running on an new enough OS (5.6 or 4549 // later) that it will have a new enough libthread.so. 4550 guarantee(func != NULL, "libthread.so is too old."); 4551 } 4552 4553 // Initialize the new libthread getstate API wrappers 4554 func = resolve_symbol("thr_getstate"); 4555 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4556 4557 func = resolve_symbol("thr_setstate"); 4558 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4559 4560 func = resolve_symbol("thr_setmutator"); 4561 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4562 4563 func = resolve_symbol("thr_suspend_mutator"); 4564 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4565 4566 func = resolve_symbol("thr_continue_mutator"); 4567 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4568 4569 int size; 4570 void (*handler_info_func)(address *, int *); 4571 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4572 handler_info_func(&handler_start, &size); 4573 handler_end = handler_start + size; 4574} 4575 4576 4577int_fnP_mutex_tP os::Solaris::_mutex_lock; 4578int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4579int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4580int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4581int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4582int os::Solaris::_mutex_scope = USYNC_THREAD; 4583 4584int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4585int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4586int_fnP_cond_tP os::Solaris::_cond_signal; 4587int_fnP_cond_tP os::Solaris::_cond_broadcast; 4588int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4589int_fnP_cond_tP os::Solaris::_cond_destroy; 4590int os::Solaris::_cond_scope = USYNC_THREAD; 4591 4592void os::Solaris::synchronization_init() { 4593 if(UseLWPSynchronization) { 4594 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4595 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4596 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4597 os::Solaris::set_mutex_init(lwp_mutex_init); 4598 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4599 os::Solaris::set_mutex_scope(USYNC_THREAD); 4600 4601 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4602 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4603 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4604 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4605 os::Solaris::set_cond_init(lwp_cond_init); 4606 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4607 os::Solaris::set_cond_scope(USYNC_THREAD); 4608 } 4609 else { 4610 os::Solaris::set_mutex_scope(USYNC_THREAD); 4611 os::Solaris::set_cond_scope(USYNC_THREAD); 4612 4613 if(UsePthreads) { 4614 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4615 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4616 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4617 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4618 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4619 4620 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4621 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4622 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4623 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4624 os::Solaris::set_cond_init(pthread_cond_default_init); 4625 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4626 } 4627 else { 4628 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4629 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4630 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4631 os::Solaris::set_mutex_init(::mutex_init); 4632 os::Solaris::set_mutex_destroy(::mutex_destroy); 4633 4634 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4635 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4636 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4637 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4638 os::Solaris::set_cond_init(::cond_init); 4639 os::Solaris::set_cond_destroy(::cond_destroy); 4640 } 4641 } 4642} 4643 4644void os::Solaris::liblgrp_init() { 4645 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4646 if (handle != NULL) { 4647 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4648 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4649 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4650 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4651 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4652 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4653 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4654 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4655 dlsym(handle, "lgrp_cookie_stale"))); 4656 4657 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4658 set_lgrp_cookie(c); 4659 } else { 4660 warning("your OS does not support NUMA"); 4661 } 4662} 4663 4664void os::Solaris::misc_sym_init() { 4665 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); 4666 if(func == NULL) { 4667 func = (address) dlsym(RTLD_NEXT, "meminfo"); 4668 } 4669 if (func != NULL) { 4670 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4671 } 4672} 4673 4674// Symbol doesn't exist in Solaris 8 pset.h 4675#ifndef PS_MYID 4676#define PS_MYID -3 4677#endif 4678 4679// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4680typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4681static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4682 4683void init_pset_getloadavg_ptr(void) { 4684 pset_getloadavg_ptr = 4685 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4686 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4687 warning("pset_getloadavg function not found"); 4688 } 4689} 4690 4691int os::Solaris::_dev_zero_fd = -1; 4692 4693// this is called _before_ the global arguments have been parsed 4694void os::init(void) { 4695 _initial_pid = getpid(); 4696 4697 max_hrtime = first_hrtime = gethrtime(); 4698 4699 init_random(1234567); 4700 4701 page_size = sysconf(_SC_PAGESIZE); 4702 if (page_size == -1) 4703 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); 4704 init_page_sizes((size_t) page_size); 4705 4706 Solaris::initialize_system_info(); 4707 4708 int fd = open("/dev/zero", O_RDWR); 4709 if (fd < 0) { 4710 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); 4711 } else { 4712 Solaris::set_dev_zero_fd(fd); 4713 4714 // Close on exec, child won't inherit. 4715 fcntl(fd, F_SETFD, FD_CLOEXEC); 4716 } 4717 4718 clock_tics_per_sec = CLK_TCK; 4719 4720 // check if dladdr1() exists; dladdr1 can provide more information than 4721 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4722 // and is available on linker patches for 5.7 and 5.8. 4723 // libdl.so must have been loaded, this call is just an entry lookup 4724 void * hdl = dlopen("libdl.so", RTLD_NOW); 4725 if (hdl) 4726 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4727 4728 // (Solaris only) this switches to calls that actually do locking. 4729 ThreadCritical::initialize(); 4730 4731 main_thread = thr_self(); 4732 4733 // Constant minimum stack size allowed. It must be at least 4734 // the minimum of what the OS supports (thr_min_stack()), and 4735 // enough to allow the thread to get to user bytecode execution. 4736 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4737 // If the pagesize of the VM is greater than 8K determine the appropriate 4738 // number of initial guard pages. The user can change this with the 4739 // command line arguments, if needed. 4740 if (vm_page_size() > 8*K) { 4741 StackYellowPages = 1; 4742 StackRedPages = 1; 4743 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4744 } 4745} 4746 4747// To install functions for atexit system call 4748extern "C" { 4749 static void perfMemory_exit_helper() { 4750 perfMemory_exit(); 4751 } 4752} 4753 4754// this is called _after_ the global arguments have been parsed 4755jint os::init_2(void) { 4756 // try to enable extended file IO ASAP, see 6431278 4757 os::Solaris::try_enable_extended_io(); 4758 4759 // Allocate a single page and mark it as readable for safepoint polling. Also 4760 // use this first mmap call to check support for MAP_ALIGN. 4761 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4762 page_size, 4763 MAP_PRIVATE | MAP_ALIGN, 4764 PROT_READ); 4765 if (polling_page == NULL) { 4766 has_map_align = false; 4767 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4768 PROT_READ); 4769 } 4770 4771 os::set_polling_page(polling_page); 4772 4773#ifndef PRODUCT 4774 if( Verbose && PrintMiscellaneous ) 4775 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4776#endif 4777 4778 if (!UseMembar) { 4779 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4780 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4781 os::set_memory_serialize_page( mem_serialize_page ); 4782 4783#ifndef PRODUCT 4784 if(Verbose && PrintMiscellaneous) 4785 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4786#endif 4787} 4788 4789 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4790 4791 // Check minimum allowable stack size for thread creation and to initialize 4792 // the java system classes, including StackOverflowError - depends on page 4793 // size. Add a page for compiler2 recursion in main thread. 4794 // Add in BytesPerWord times page size to account for VM stack during 4795 // class initialization depending on 32 or 64 bit VM. 4796 guarantee((Solaris::min_stack_allowed >= 4797 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord 4798 COMPILER2_PRESENT(+1)) * page_size), 4799 "need to increase Solaris::min_stack_allowed on this platform"); 4800 4801 size_t threadStackSizeInBytes = ThreadStackSize * K; 4802 if (threadStackSizeInBytes != 0 && 4803 threadStackSizeInBytes < Solaris::min_stack_allowed) { 4804 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4805 Solaris::min_stack_allowed/K); 4806 return JNI_ERR; 4807 } 4808 4809 // For 64kbps there will be a 64kb page size, which makes 4810 // the usable default stack size quite a bit less. Increase the 4811 // stack for 64kb (or any > than 8kb) pages, this increases 4812 // virtual memory fragmentation (since we're not creating the 4813 // stack on a power of 2 boundary. The real fix for this 4814 // should be to fix the guard page mechanism. 4815 4816 if (vm_page_size() > 8*K) { 4817 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4818 ? threadStackSizeInBytes + 4819 ((StackYellowPages + StackRedPages) * vm_page_size()) 4820 : 0; 4821 ThreadStackSize = threadStackSizeInBytes/K; 4822 } 4823 4824 // Make the stack size a multiple of the page size so that 4825 // the yellow/red zones can be guarded. 4826 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4827 vm_page_size())); 4828 4829 Solaris::libthread_init(); 4830 if (UseNUMA) { 4831 Solaris::liblgrp_init(); 4832 } 4833 Solaris::misc_sym_init(); 4834 Solaris::signal_sets_init(); 4835 Solaris::init_signal_mem(); 4836 Solaris::install_signal_handlers(); 4837 4838 if (libjsigversion < JSIG_VERSION_1_4_1) { 4839 Maxlibjsigsigs = OLDMAXSIGNUM; 4840 } 4841 4842 // initialize synchronization primitives to use either thread or 4843 // lwp synchronization (controlled by UseLWPSynchronization) 4844 Solaris::synchronization_init(); 4845 4846 if (MaxFDLimit) { 4847 // set the number of file descriptors to max. print out error 4848 // if getrlimit/setrlimit fails but continue regardless. 4849 struct rlimit nbr_files; 4850 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4851 if (status != 0) { 4852 if (PrintMiscellaneous && (Verbose || WizardMode)) 4853 perror("os::init_2 getrlimit failed"); 4854 } else { 4855 nbr_files.rlim_cur = nbr_files.rlim_max; 4856 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4857 if (status != 0) { 4858 if (PrintMiscellaneous && (Verbose || WizardMode)) 4859 perror("os::init_2 setrlimit failed"); 4860 } 4861 } 4862 } 4863 4864 // Initialize HPI. 4865 jint hpi_result = hpi::initialize(); 4866 if (hpi_result != JNI_OK) { 4867 tty->print_cr("There was an error trying to initialize the HPI library."); 4868 return hpi_result; 4869 } 4870 4871 // Calculate theoretical max. size of Threads to guard gainst 4872 // artifical out-of-memory situations, where all available address- 4873 // space has been reserved by thread stacks. Default stack size is 1Mb. 4874 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4875 JavaThread::stack_size_at_create() : (1*K*K); 4876 assert(pre_thread_stack_size != 0, "Must have a stack"); 4877 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4878 // we should start doing Virtual Memory banging. Currently when the threads will 4879 // have used all but 200Mb of space. 4880 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4881 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4882 4883 // at-exit methods are called in the reverse order of their registration. 4884 // In Solaris 7 and earlier, atexit functions are called on return from 4885 // main or as a result of a call to exit(3C). There can be only 32 of 4886 // these functions registered and atexit() does not set errno. In Solaris 4887 // 8 and later, there is no limit to the number of functions registered 4888 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4889 // functions are called upon dlclose(3DL) in addition to return from main 4890 // and exit(3C). 4891 4892 if (PerfAllowAtExitRegistration) { 4893 // only register atexit functions if PerfAllowAtExitRegistration is set. 4894 // atexit functions can be delayed until process exit time, which 4895 // can be problematic for embedded VM situations. Embedded VMs should 4896 // call DestroyJavaVM() to assure that VM resources are released. 4897 4898 // note: perfMemory_exit_helper atexit function may be removed in 4899 // the future if the appropriate cleanup code can be added to the 4900 // VM_Exit VMOperation's doit method. 4901 if (atexit(perfMemory_exit_helper) != 0) { 4902 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4903 } 4904 } 4905 4906 // Init pset_loadavg function pointer 4907 init_pset_getloadavg_ptr(); 4908 4909 return JNI_OK; 4910} 4911 4912 4913// Mark the polling page as unreadable 4914void os::make_polling_page_unreadable(void) { 4915 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 4916 fatal("Could not disable polling page"); 4917}; 4918 4919// Mark the polling page as readable 4920void os::make_polling_page_readable(void) { 4921 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 4922 fatal("Could not enable polling page"); 4923}; 4924 4925// OS interface. 4926 4927int os::stat(const char *path, struct stat *sbuf) { 4928 char pathbuf[MAX_PATH]; 4929 if (strlen(path) > MAX_PATH - 1) { 4930 errno = ENAMETOOLONG; 4931 return -1; 4932 } 4933 hpi::native_path(strcpy(pathbuf, path)); 4934 return ::stat(pathbuf, sbuf); 4935} 4936 4937 4938bool os::check_heap(bool force) { return true; } 4939 4940typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 4941static vsnprintf_t sol_vsnprintf = NULL; 4942 4943int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 4944 if (!sol_vsnprintf) { 4945 //search for the named symbol in the objects that were loaded after libjvm 4946 void* where = RTLD_NEXT; 4947 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4948 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4949 if (!sol_vsnprintf){ 4950 //search for the named symbol in the objects that were loaded before libjvm 4951 where = RTLD_DEFAULT; 4952 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4953 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4954 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 4955 } 4956 } 4957 return (*sol_vsnprintf)(buf, count, fmt, argptr); 4958} 4959 4960 4961// Is a (classpath) directory empty? 4962bool os::dir_is_empty(const char* path) { 4963 DIR *dir = NULL; 4964 struct dirent *ptr; 4965 4966 dir = opendir(path); 4967 if (dir == NULL) return true; 4968 4969 /* Scan the directory */ 4970 bool result = true; 4971 char buf[sizeof(struct dirent) + MAX_PATH]; 4972 struct dirent *dbuf = (struct dirent *) buf; 4973 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4974 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4975 result = false; 4976 } 4977 } 4978 closedir(dir); 4979 return result; 4980} 4981 4982// create binary file, rewriting existing file if required 4983int os::create_binary_file(const char* path, bool rewrite_existing) { 4984 int oflags = O_WRONLY | O_CREAT; 4985 if (!rewrite_existing) { 4986 oflags |= O_EXCL; 4987 } 4988 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4989} 4990 4991// return current position of file pointer 4992jlong os::current_file_offset(int fd) { 4993 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4994} 4995 4996// move file pointer to the specified offset 4997jlong os::seek_to_file_offset(int fd, jlong offset) { 4998 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4999} 5000 5001// Map a block of memory. 5002char* os::map_memory(int fd, const char* file_name, size_t file_offset, 5003 char *addr, size_t bytes, bool read_only, 5004 bool allow_exec) { 5005 int prot; 5006 int flags; 5007 5008 if (read_only) { 5009 prot = PROT_READ; 5010 flags = MAP_SHARED; 5011 } else { 5012 prot = PROT_READ | PROT_WRITE; 5013 flags = MAP_PRIVATE; 5014 } 5015 5016 if (allow_exec) { 5017 prot |= PROT_EXEC; 5018 } 5019 5020 if (addr != NULL) { 5021 flags |= MAP_FIXED; 5022 } 5023 5024 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5025 fd, file_offset); 5026 if (mapped_address == MAP_FAILED) { 5027 return NULL; 5028 } 5029 return mapped_address; 5030} 5031 5032 5033// Remap a block of memory. 5034char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 5035 char *addr, size_t bytes, bool read_only, 5036 bool allow_exec) { 5037 // same as map_memory() on this OS 5038 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5039 allow_exec); 5040} 5041 5042 5043// Unmap a block of memory. 5044bool os::unmap_memory(char* addr, size_t bytes) { 5045 return munmap(addr, bytes) == 0; 5046} 5047 5048void os::pause() { 5049 char filename[MAX_PATH]; 5050 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5051 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5052 } else { 5053 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5054 } 5055 5056 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5057 if (fd != -1) { 5058 struct stat buf; 5059 close(fd); 5060 while (::stat(filename, &buf) == 0) { 5061 (void)::poll(NULL, 0, 100); 5062 } 5063 } else { 5064 jio_fprintf(stderr, 5065 "Could not open pause file '%s', continuing immediately.\n", filename); 5066 } 5067} 5068 5069#ifndef PRODUCT 5070#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5071// Turn this on if you need to trace synch operations. 5072// Set RECORD_SYNCH_LIMIT to a large-enough value, 5073// and call record_synch_enable and record_synch_disable 5074// around the computation of interest. 5075 5076void record_synch(char* name, bool returning); // defined below 5077 5078class RecordSynch { 5079 char* _name; 5080 public: 5081 RecordSynch(char* name) :_name(name) 5082 { record_synch(_name, false); } 5083 ~RecordSynch() { record_synch(_name, true); } 5084}; 5085 5086#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5087extern "C" ret name params { \ 5088 typedef ret name##_t params; \ 5089 static name##_t* implem = NULL; \ 5090 static int callcount = 0; \ 5091 if (implem == NULL) { \ 5092 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5093 if (implem == NULL) fatal(dlerror()); \ 5094 } \ 5095 ++callcount; \ 5096 RecordSynch _rs(#name); \ 5097 inner; \ 5098 return implem args; \ 5099} 5100// in dbx, examine callcounts this way: 5101// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5102 5103#define CHECK_POINTER_OK(p) \ 5104 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5105#define CHECK_MU \ 5106 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5107#define CHECK_CV \ 5108 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5109#define CHECK_P(p) \ 5110 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5111 5112#define CHECK_MUTEX(mutex_op) \ 5113CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5114 5115CHECK_MUTEX( mutex_lock) 5116CHECK_MUTEX( _mutex_lock) 5117CHECK_MUTEX( mutex_unlock) 5118CHECK_MUTEX(_mutex_unlock) 5119CHECK_MUTEX( mutex_trylock) 5120CHECK_MUTEX(_mutex_trylock) 5121 5122#define CHECK_COND(cond_op) \ 5123CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5124 5125CHECK_COND( cond_wait); 5126CHECK_COND(_cond_wait); 5127CHECK_COND(_cond_wait_cancel); 5128 5129#define CHECK_COND2(cond_op) \ 5130CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5131 5132CHECK_COND2( cond_timedwait); 5133CHECK_COND2(_cond_timedwait); 5134CHECK_COND2(_cond_timedwait_cancel); 5135 5136// do the _lwp_* versions too 5137#define mutex_t lwp_mutex_t 5138#define cond_t lwp_cond_t 5139CHECK_MUTEX( _lwp_mutex_lock) 5140CHECK_MUTEX( _lwp_mutex_unlock) 5141CHECK_MUTEX( _lwp_mutex_trylock) 5142CHECK_MUTEX( __lwp_mutex_lock) 5143CHECK_MUTEX( __lwp_mutex_unlock) 5144CHECK_MUTEX( __lwp_mutex_trylock) 5145CHECK_MUTEX(___lwp_mutex_lock) 5146CHECK_MUTEX(___lwp_mutex_unlock) 5147 5148CHECK_COND( _lwp_cond_wait); 5149CHECK_COND( __lwp_cond_wait); 5150CHECK_COND(___lwp_cond_wait); 5151 5152CHECK_COND2( _lwp_cond_timedwait); 5153CHECK_COND2( __lwp_cond_timedwait); 5154#undef mutex_t 5155#undef cond_t 5156 5157CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5158CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5159CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5160CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5161CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5162CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5163CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5164CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5165 5166 5167// recording machinery: 5168 5169enum { RECORD_SYNCH_LIMIT = 200 }; 5170char* record_synch_name[RECORD_SYNCH_LIMIT]; 5171void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5172bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5173thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5174int record_synch_count = 0; 5175bool record_synch_enabled = false; 5176 5177// in dbx, examine recorded data this way: 5178// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5179 5180void record_synch(char* name, bool returning) { 5181 if (record_synch_enabled) { 5182 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5183 record_synch_name[record_synch_count] = name; 5184 record_synch_returning[record_synch_count] = returning; 5185 record_synch_thread[record_synch_count] = thr_self(); 5186 record_synch_arg0ptr[record_synch_count] = &name; 5187 record_synch_count++; 5188 } 5189 // put more checking code here: 5190 // ... 5191 } 5192} 5193 5194void record_synch_enable() { 5195 // start collecting trace data, if not already doing so 5196 if (!record_synch_enabled) record_synch_count = 0; 5197 record_synch_enabled = true; 5198} 5199 5200void record_synch_disable() { 5201 // stop collecting trace data 5202 record_synch_enabled = false; 5203} 5204 5205#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5206#endif // PRODUCT 5207 5208const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5209const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5210 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5211 5212 5213// JVMTI & JVM monitoring and management support 5214// The thread_cpu_time() and current_thread_cpu_time() are only 5215// supported if is_thread_cpu_time_supported() returns true. 5216// They are not supported on Solaris T1. 5217 5218// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5219// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5220// of a thread. 5221// 5222// current_thread_cpu_time() and thread_cpu_time(Thread *) 5223// returns the fast estimate available on the platform. 5224 5225// hrtime_t gethrvtime() return value includes 5226// user time but does not include system time 5227jlong os::current_thread_cpu_time() { 5228 return (jlong) gethrvtime(); 5229} 5230 5231jlong os::thread_cpu_time(Thread *thread) { 5232 // return user level CPU time only to be consistent with 5233 // what current_thread_cpu_time returns. 5234 // thread_cpu_time_info() must be changed if this changes 5235 return os::thread_cpu_time(thread, false /* user time only */); 5236} 5237 5238jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5239 if (user_sys_cpu_time) { 5240 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5241 } else { 5242 return os::current_thread_cpu_time(); 5243 } 5244} 5245 5246jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5247 char proc_name[64]; 5248 int count; 5249 prusage_t prusage; 5250 jlong lwp_time; 5251 int fd; 5252 5253 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5254 getpid(), 5255 thread->osthread()->lwp_id()); 5256 fd = open(proc_name, O_RDONLY); 5257 if ( fd == -1 ) return -1; 5258 5259 do { 5260 count = pread(fd, 5261 (void *)&prusage.pr_utime, 5262 thr_time_size, 5263 thr_time_off); 5264 } while (count < 0 && errno == EINTR); 5265 close(fd); 5266 if ( count < 0 ) return -1; 5267 5268 if (user_sys_cpu_time) { 5269 // user + system CPU time 5270 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5271 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5272 (jlong)prusage.pr_stime.tv_nsec + 5273 (jlong)prusage.pr_utime.tv_nsec; 5274 } else { 5275 // user level CPU time only 5276 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5277 (jlong)prusage.pr_utime.tv_nsec; 5278 } 5279 5280 return(lwp_time); 5281} 5282 5283void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5284 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5285 info_ptr->may_skip_backward = false; // elapsed time not wall time 5286 info_ptr->may_skip_forward = false; // elapsed time not wall time 5287 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5288} 5289 5290void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5291 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5292 info_ptr->may_skip_backward = false; // elapsed time not wall time 5293 info_ptr->may_skip_forward = false; // elapsed time not wall time 5294 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5295} 5296 5297bool os::is_thread_cpu_time_supported() { 5298 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5299 return true; 5300 } else { 5301 return false; 5302 } 5303} 5304 5305// System loadavg support. Returns -1 if load average cannot be obtained. 5306// Return the load average for our processor set if the primitive exists 5307// (Solaris 9 and later). Otherwise just return system wide loadavg. 5308int os::loadavg(double loadavg[], int nelem) { 5309 if (pset_getloadavg_ptr != NULL) { 5310 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5311 } else { 5312 return ::getloadavg(loadavg, nelem); 5313 } 5314} 5315 5316//--------------------------------------------------------------------------------- 5317#ifndef PRODUCT 5318 5319static address same_page(address x, address y) { 5320 intptr_t page_bits = -os::vm_page_size(); 5321 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5322 return x; 5323 else if (x > y) 5324 return (address)(intptr_t(y) | ~page_bits) + 1; 5325 else 5326 return (address)(intptr_t(y) & page_bits); 5327} 5328 5329bool os::find(address addr) { 5330 Dl_info dlinfo; 5331 memset(&dlinfo, 0, sizeof(dlinfo)); 5332 if (dladdr(addr, &dlinfo)) { 5333#ifdef _LP64 5334 tty->print("0x%016lx: ", addr); 5335#else 5336 tty->print("0x%08x: ", addr); 5337#endif 5338 if (dlinfo.dli_sname != NULL) 5339 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5340 else if (dlinfo.dli_fname) 5341 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5342 else 5343 tty->print("<absolute address>"); 5344 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); 5345#ifdef _LP64 5346 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); 5347#else 5348 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); 5349#endif 5350 tty->cr(); 5351 5352 if (Verbose) { 5353 // decode some bytes around the PC 5354 address begin = same_page(addr-40, addr); 5355 address end = same_page(addr+40, addr); 5356 address lowest = (address) dlinfo.dli_sname; 5357 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5358 if (begin < lowest) begin = lowest; 5359 Dl_info dlinfo2; 5360 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5361 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5362 end = (address) dlinfo2.dli_saddr; 5363 Disassembler::decode(begin, end); 5364 } 5365 return true; 5366 } 5367 return false; 5368} 5369 5370#endif 5371 5372 5373// Following function has been added to support HotSparc's libjvm.so running 5374// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5375// src/solaris/hpi/native_threads in the EVM codebase. 5376// 5377// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5378// libraries and should thus be removed. We will leave it behind for a while 5379// until we no longer want to able to run on top of 1.3.0 Solaris production 5380// JDK. See 4341971. 5381 5382#define STACK_SLACK 0x800 5383 5384extern "C" { 5385 intptr_t sysThreadAvailableStackWithSlack() { 5386 stack_t st; 5387 intptr_t retval, stack_top; 5388 retval = thr_stksegment(&st); 5389 assert(retval == 0, "incorrect return value from thr_stksegment"); 5390 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5391 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5392 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5393 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5394 } 5395} 5396 5397// Just to get the Kernel build to link on solaris for testing. 5398 5399extern "C" { 5400class ASGCT_CallTrace; 5401void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5402 KERNEL_RETURN; 5403} 5404 5405 5406// ObjectMonitor park-unpark infrastructure ... 5407// 5408// We implement Solaris and Linux PlatformEvents with the 5409// obvious condvar-mutex-flag triple. 5410// Another alternative that works quite well is pipes: 5411// Each PlatformEvent consists of a pipe-pair. 5412// The thread associated with the PlatformEvent 5413// calls park(), which reads from the input end of the pipe. 5414// Unpark() writes into the other end of the pipe. 5415// The write-side of the pipe must be set NDELAY. 5416// Unfortunately pipes consume a large # of handles. 5417// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5418// Using pipes for the 1st few threads might be workable, however. 5419// 5420// park() is permitted to return spuriously. 5421// Callers of park() should wrap the call to park() in 5422// an appropriate loop. A litmus test for the correct 5423// usage of park is the following: if park() were modified 5424// to immediately return 0 your code should still work, 5425// albeit degenerating to a spin loop. 5426// 5427// An interesting optimization for park() is to use a trylock() 5428// to attempt to acquire the mutex. If the trylock() fails 5429// then we know that a concurrent unpark() operation is in-progress. 5430// in that case the park() code could simply set _count to 0 5431// and return immediately. The subsequent park() operation *might* 5432// return immediately. That's harmless as the caller of park() is 5433// expected to loop. By using trylock() we will have avoided a 5434// avoided a context switch caused by contention on the per-thread mutex. 5435// 5436// TODO-FIXME: 5437// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5438// objectmonitor implementation. 5439// 2. Collapse the JSR166 parker event, and the 5440// objectmonitor ParkEvent into a single "Event" construct. 5441// 3. In park() and unpark() add: 5442// assert (Thread::current() == AssociatedWith). 5443// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5444// 1-out-of-N park() operations will return immediately. 5445// 5446// _Event transitions in park() 5447// -1 => -1 : illegal 5448// 1 => 0 : pass - return immediately 5449// 0 => -1 : block 5450// 5451// _Event serves as a restricted-range semaphore. 5452// 5453// Another possible encoding of _Event would be with 5454// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5455// 5456// TODO-FIXME: add DTRACE probes for: 5457// 1. Tx parks 5458// 2. Ty unparks Tx 5459// 3. Tx resumes from park 5460 5461 5462// value determined through experimentation 5463#define ROUNDINGFIX 11 5464 5465// utility to compute the abstime argument to timedwait. 5466// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5467 5468static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5469 // millis is the relative timeout time 5470 // abstime will be the absolute timeout time 5471 if (millis < 0) millis = 0; 5472 struct timeval now; 5473 int status = gettimeofday(&now, NULL); 5474 assert(status == 0, "gettimeofday"); 5475 jlong seconds = millis / 1000; 5476 jlong max_wait_period; 5477 5478 if (UseLWPSynchronization) { 5479 // forward port of fix for 4275818 (not sleeping long enough) 5480 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5481 // _lwp_cond_timedwait() used a round_down algorithm rather 5482 // than a round_up. For millis less than our roundfactor 5483 // it rounded down to 0 which doesn't meet the spec. 5484 // For millis > roundfactor we may return a bit sooner, but 5485 // since we can not accurately identify the patch level and 5486 // this has already been fixed in Solaris 9 and 8 we will 5487 // leave it alone rather than always rounding down. 5488 5489 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5490 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5491 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5492 max_wait_period = 21000000; 5493 } else { 5494 max_wait_period = 50000000; 5495 } 5496 millis %= 1000; 5497 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5498 seconds = max_wait_period; 5499 } 5500 abstime->tv_sec = now.tv_sec + seconds; 5501 long usec = now.tv_usec + millis * 1000; 5502 if (usec >= 1000000) { 5503 abstime->tv_sec += 1; 5504 usec -= 1000000; 5505 } 5506 abstime->tv_nsec = usec * 1000; 5507 return abstime; 5508} 5509 5510// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5511// Conceptually TryPark() should be equivalent to park(0). 5512 5513int os::PlatformEvent::TryPark() { 5514 for (;;) { 5515 const int v = _Event ; 5516 guarantee ((v == 0) || (v == 1), "invariant") ; 5517 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5518 } 5519} 5520 5521void os::PlatformEvent::park() { // AKA: down() 5522 // Invariant: Only the thread associated with the Event/PlatformEvent 5523 // may call park(). 5524 int v ; 5525 for (;;) { 5526 v = _Event ; 5527 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5528 } 5529 guarantee (v >= 0, "invariant") ; 5530 if (v == 0) { 5531 // Do this the hard way by blocking ... 5532 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5533 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5534 // Only for SPARC >= V8PlusA 5535#if defined(__sparc) && defined(COMPILER2) 5536 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5537#endif 5538 int status = os::Solaris::mutex_lock(_mutex); 5539 assert_status(status == 0, status, "mutex_lock"); 5540 guarantee (_nParked == 0, "invariant") ; 5541 ++ _nParked ; 5542 while (_Event < 0) { 5543 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5544 // Treat this the same as if the wait was interrupted 5545 // With usr/lib/lwp going to kernel, always handle ETIME 5546 status = os::Solaris::cond_wait(_cond, _mutex); 5547 if (status == ETIME) status = EINTR ; 5548 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5549 } 5550 -- _nParked ; 5551 _Event = 0 ; 5552 status = os::Solaris::mutex_unlock(_mutex); 5553 assert_status(status == 0, status, "mutex_unlock"); 5554 } 5555} 5556 5557int os::PlatformEvent::park(jlong millis) { 5558 guarantee (_nParked == 0, "invariant") ; 5559 int v ; 5560 for (;;) { 5561 v = _Event ; 5562 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5563 } 5564 guarantee (v >= 0, "invariant") ; 5565 if (v != 0) return OS_OK ; 5566 5567 int ret = OS_TIMEOUT; 5568 timestruc_t abst; 5569 compute_abstime (&abst, millis); 5570 5571 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5572 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5573 // Only for SPARC >= V8PlusA 5574#if defined(__sparc) && defined(COMPILER2) 5575 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5576#endif 5577 int status = os::Solaris::mutex_lock(_mutex); 5578 assert_status(status == 0, status, "mutex_lock"); 5579 guarantee (_nParked == 0, "invariant") ; 5580 ++ _nParked ; 5581 while (_Event < 0) { 5582 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5583 assert_status(status == 0 || status == EINTR || 5584 status == ETIME || status == ETIMEDOUT, 5585 status, "cond_timedwait"); 5586 if (!FilterSpuriousWakeups) break ; // previous semantics 5587 if (status == ETIME || status == ETIMEDOUT) break ; 5588 // We consume and ignore EINTR and spurious wakeups. 5589 } 5590 -- _nParked ; 5591 if (_Event >= 0) ret = OS_OK ; 5592 _Event = 0 ; 5593 status = os::Solaris::mutex_unlock(_mutex); 5594 assert_status(status == 0, status, "mutex_unlock"); 5595 return ret; 5596} 5597 5598void os::PlatformEvent::unpark() { 5599 int v, AnyWaiters; 5600 5601 // Increment _Event. 5602 // Another acceptable implementation would be to simply swap 1 5603 // into _Event: 5604 // if (Swap (&_Event, 1) < 0) { 5605 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5606 // if (AnyWaiters) cond_signal (_cond) ; 5607 // } 5608 5609 for (;;) { 5610 v = _Event ; 5611 if (v > 0) { 5612 // The LD of _Event could have reordered or be satisfied 5613 // by a read-aside from this processor's write buffer. 5614 // To avoid problems execute a barrier and then 5615 // ratify the value. A degenerate CAS() would also work. 5616 // Viz., CAS (v+0, &_Event, v) == v). 5617 OrderAccess::fence() ; 5618 if (_Event == v) return ; 5619 continue ; 5620 } 5621 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5622 } 5623 5624 // If the thread associated with the event was parked, wake it. 5625 if (v < 0) { 5626 int status ; 5627 // Wait for the thread assoc with the PlatformEvent to vacate. 5628 status = os::Solaris::mutex_lock(_mutex); 5629 assert_status(status == 0, status, "mutex_lock"); 5630 AnyWaiters = _nParked ; 5631 status = os::Solaris::mutex_unlock(_mutex); 5632 assert_status(status == 0, status, "mutex_unlock"); 5633 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5634 if (AnyWaiters != 0) { 5635 // We intentional signal *after* dropping the lock 5636 // to avoid a common class of futile wakeups. 5637 status = os::Solaris::cond_signal(_cond); 5638 assert_status(status == 0, status, "cond_signal"); 5639 } 5640 } 5641} 5642 5643// JSR166 5644// ------------------------------------------------------- 5645 5646/* 5647 * The solaris and linux implementations of park/unpark are fairly 5648 * conservative for now, but can be improved. They currently use a 5649 * mutex/condvar pair, plus _counter. 5650 * Park decrements _counter if > 0, else does a condvar wait. Unpark 5651 * sets count to 1 and signals condvar. Only one thread ever waits 5652 * on the condvar. Contention seen when trying to park implies that someone 5653 * is unparking you, so don't wait. And spurious returns are fine, so there 5654 * is no need to track notifications. 5655 */ 5656 5657#define NANOSECS_PER_SEC 1000000000 5658#define NANOSECS_PER_MILLISEC 1000000 5659#define MAX_SECS 100000000 5660 5661/* 5662 * This code is common to linux and solaris and will be moved to a 5663 * common place in dolphin. 5664 * 5665 * The passed in time value is either a relative time in nanoseconds 5666 * or an absolute time in milliseconds. Either way it has to be unpacked 5667 * into suitable seconds and nanoseconds components and stored in the 5668 * given timespec structure. 5669 * Given time is a 64-bit value and the time_t used in the timespec is only 5670 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 5671 * overflow if times way in the future are given. Further on Solaris versions 5672 * prior to 10 there is a restriction (see cond_timedwait) that the specified 5673 * number of seconds, in abstime, is less than current_time + 100,000,000. 5674 * As it will be 28 years before "now + 100000000" will overflow we can 5675 * ignore overflow and just impose a hard-limit on seconds using the value 5676 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 5677 * years from "now". 5678 */ 5679static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5680 assert (time > 0, "convertTime"); 5681 5682 struct timeval now; 5683 int status = gettimeofday(&now, NULL); 5684 assert(status == 0, "gettimeofday"); 5685 5686 time_t max_secs = now.tv_sec + MAX_SECS; 5687 5688 if (isAbsolute) { 5689 jlong secs = time / 1000; 5690 if (secs > max_secs) { 5691 absTime->tv_sec = max_secs; 5692 } 5693 else { 5694 absTime->tv_sec = secs; 5695 } 5696 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5697 } 5698 else { 5699 jlong secs = time / NANOSECS_PER_SEC; 5700 if (secs >= MAX_SECS) { 5701 absTime->tv_sec = max_secs; 5702 absTime->tv_nsec = 0; 5703 } 5704 else { 5705 absTime->tv_sec = now.tv_sec + secs; 5706 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5707 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5708 absTime->tv_nsec -= NANOSECS_PER_SEC; 5709 ++absTime->tv_sec; // note: this must be <= max_secs 5710 } 5711 } 5712 } 5713 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5714 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5715 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5716 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5717} 5718 5719void Parker::park(bool isAbsolute, jlong time) { 5720 5721 // Optional fast-path check: 5722 // Return immediately if a permit is available. 5723 if (_counter > 0) { 5724 _counter = 0 ; 5725 return ; 5726 } 5727 5728 // Optional fast-exit: Check interrupt before trying to wait 5729 Thread* thread = Thread::current(); 5730 assert(thread->is_Java_thread(), "Must be JavaThread"); 5731 JavaThread *jt = (JavaThread *)thread; 5732 if (Thread::is_interrupted(thread, false)) { 5733 return; 5734 } 5735 5736 // First, demultiplex/decode time arguments 5737 timespec absTime; 5738 if (time < 0) { // don't wait at all 5739 return; 5740 } 5741 if (time > 0) { 5742 // Warning: this code might be exposed to the old Solaris time 5743 // round-down bugs. Grep "roundingFix" for details. 5744 unpackTime(&absTime, isAbsolute, time); 5745 } 5746 5747 // Enter safepoint region 5748 // Beware of deadlocks such as 6317397. 5749 // The per-thread Parker:: _mutex is a classic leaf-lock. 5750 // In particular a thread must never block on the Threads_lock while 5751 // holding the Parker:: mutex. If safepoints are pending both the 5752 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5753 ThreadBlockInVM tbivm(jt); 5754 5755 // Don't wait if cannot get lock since interference arises from 5756 // unblocking. Also. check interrupt before trying wait 5757 if (Thread::is_interrupted(thread, false) || 5758 os::Solaris::mutex_trylock(_mutex) != 0) { 5759 return; 5760 } 5761 5762 int status ; 5763 5764 if (_counter > 0) { // no wait needed 5765 _counter = 0; 5766 status = os::Solaris::mutex_unlock(_mutex); 5767 assert (status == 0, "invariant") ; 5768 return; 5769 } 5770 5771#ifdef ASSERT 5772 // Don't catch signals while blocked; let the running threads have the signals. 5773 // (This allows a debugger to break into the running thread.) 5774 sigset_t oldsigs; 5775 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5776 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5777#endif 5778 5779 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5780 jt->set_suspend_equivalent(); 5781 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5782 5783 // Do this the hard way by blocking ... 5784 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5785 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5786 // Only for SPARC >= V8PlusA 5787#if defined(__sparc) && defined(COMPILER2) 5788 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5789#endif 5790 5791 if (time == 0) { 5792 status = os::Solaris::cond_wait (_cond, _mutex) ; 5793 } else { 5794 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5795 } 5796 // Note that an untimed cond_wait() can sometimes return ETIME on older 5797 // versions of the Solaris. 5798 assert_status(status == 0 || status == EINTR || 5799 status == ETIME || status == ETIMEDOUT, 5800 status, "cond_timedwait"); 5801 5802#ifdef ASSERT 5803 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5804#endif 5805 _counter = 0 ; 5806 status = os::Solaris::mutex_unlock(_mutex); 5807 assert_status(status == 0, status, "mutex_unlock") ; 5808 5809 // If externally suspended while waiting, re-suspend 5810 if (jt->handle_special_suspend_equivalent_condition()) { 5811 jt->java_suspend_self(); 5812 } 5813 5814} 5815 5816void Parker::unpark() { 5817 int s, status ; 5818 status = os::Solaris::mutex_lock (_mutex) ; 5819 assert (status == 0, "invariant") ; 5820 s = _counter; 5821 _counter = 1; 5822 status = os::Solaris::mutex_unlock (_mutex) ; 5823 assert (status == 0, "invariant") ; 5824 5825 if (s < 1) { 5826 status = os::Solaris::cond_signal (_cond) ; 5827 assert (status == 0, "invariant") ; 5828 } 5829} 5830 5831extern char** environ; 5832 5833// Run the specified command in a separate process. Return its exit value, 5834// or -1 on failure (e.g. can't fork a new process). 5835// Unlike system(), this function can be called from signal handler. It 5836// doesn't block SIGINT et al. 5837int os::fork_and_exec(char* cmd) { 5838 char * argv[4]; 5839 argv[0] = (char *)"sh"; 5840 argv[1] = (char *)"-c"; 5841 argv[2] = cmd; 5842 argv[3] = NULL; 5843 5844 // fork is async-safe, fork1 is not so can't use in signal handler 5845 pid_t pid; 5846 Thread* t = ThreadLocalStorage::get_thread_slow(); 5847 if (t != NULL && t->is_inside_signal_handler()) { 5848 pid = fork(); 5849 } else { 5850 pid = fork1(); 5851 } 5852 5853 if (pid < 0) { 5854 // fork failed 5855 warning("fork failed: %s", strerror(errno)); 5856 return -1; 5857 5858 } else if (pid == 0) { 5859 // child process 5860 5861 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5862 execve("/usr/bin/sh", argv, environ); 5863 5864 // execve failed 5865 _exit(-1); 5866 5867 } else { 5868 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5869 // care about the actual exit code, for now. 5870 5871 int status; 5872 5873 // Wait for the child process to exit. This returns immediately if 5874 // the child has already exited. */ 5875 while (waitpid(pid, &status, 0) < 0) { 5876 switch (errno) { 5877 case ECHILD: return 0; 5878 case EINTR: break; 5879 default: return -1; 5880 } 5881 } 5882 5883 if (WIFEXITED(status)) { 5884 // The child exited normally; get its exit code. 5885 return WEXITSTATUS(status); 5886 } else if (WIFSIGNALED(status)) { 5887 // The child exited because of a signal 5888 // The best value to return is 0x80 + signal number, 5889 // because that is what all Unix shells do, and because 5890 // it allows callers to distinguish between process exit and 5891 // process death by signal. 5892 return 0x80 + WTERMSIG(status); 5893 } else { 5894 // Unknown exit code; pass it through 5895 return status; 5896 } 5897 } 5898} 5899