os_solaris.cpp revision 10847:f3788f7eccd4
1/* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25// no precompiled headers 26#include "classfile/classLoader.hpp" 27#include "classfile/systemDictionary.hpp" 28#include "classfile/vmSymbols.hpp" 29#include "code/icBuffer.hpp" 30#include "code/vtableStubs.hpp" 31#include "compiler/compileBroker.hpp" 32#include "compiler/disassembler.hpp" 33#include "interpreter/interpreter.hpp" 34#include "jvm_solaris.h" 35#include "logging/log.hpp" 36#include "memory/allocation.inline.hpp" 37#include "memory/filemap.hpp" 38#include "mutex_solaris.inline.hpp" 39#include "oops/oop.inline.hpp" 40#include "os_share_solaris.hpp" 41#include "os_solaris.inline.hpp" 42#include "prims/jniFastGetField.hpp" 43#include "prims/jvm.h" 44#include "prims/jvm_misc.hpp" 45#include "runtime/arguments.hpp" 46#include "runtime/atomic.inline.hpp" 47#include "runtime/extendedPC.hpp" 48#include "runtime/globals.hpp" 49#include "runtime/interfaceSupport.hpp" 50#include "runtime/java.hpp" 51#include "runtime/javaCalls.hpp" 52#include "runtime/mutexLocker.hpp" 53#include "runtime/objectMonitor.hpp" 54#include "runtime/orderAccess.inline.hpp" 55#include "runtime/osThread.hpp" 56#include "runtime/perfMemory.hpp" 57#include "runtime/sharedRuntime.hpp" 58#include "runtime/statSampler.hpp" 59#include "runtime/stubRoutines.hpp" 60#include "runtime/thread.inline.hpp" 61#include "runtime/threadCritical.hpp" 62#include "runtime/timer.hpp" 63#include "runtime/vm_version.hpp" 64#include "semaphore_posix.hpp" 65#include "services/attachListener.hpp" 66#include "services/memTracker.hpp" 67#include "services/runtimeService.hpp" 68#include "utilities/decoder.hpp" 69#include "utilities/defaultStream.hpp" 70#include "utilities/events.hpp" 71#include "utilities/growableArray.hpp" 72#include "utilities/macros.hpp" 73#include "utilities/vmError.hpp" 74 75// put OS-includes here 76# include <dlfcn.h> 77# include <errno.h> 78# include <exception> 79# include <link.h> 80# include <poll.h> 81# include <pthread.h> 82# include <pwd.h> 83# include <schedctl.h> 84# include <setjmp.h> 85# include <signal.h> 86# include <stdio.h> 87# include <alloca.h> 88# include <sys/filio.h> 89# include <sys/ipc.h> 90# include <sys/lwp.h> 91# include <sys/machelf.h> // for elf Sym structure used by dladdr1 92# include <sys/mman.h> 93# include <sys/processor.h> 94# include <sys/procset.h> 95# include <sys/pset.h> 96# include <sys/resource.h> 97# include <sys/shm.h> 98# include <sys/socket.h> 99# include <sys/stat.h> 100# include <sys/systeminfo.h> 101# include <sys/time.h> 102# include <sys/times.h> 103# include <sys/types.h> 104# include <sys/wait.h> 105# include <sys/utsname.h> 106# include <thread.h> 107# include <unistd.h> 108# include <sys/priocntl.h> 109# include <sys/rtpriocntl.h> 110# include <sys/tspriocntl.h> 111# include <sys/iapriocntl.h> 112# include <sys/fxpriocntl.h> 113# include <sys/loadavg.h> 114# include <string.h> 115# include <stdio.h> 116 117# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 118# include <sys/procfs.h> // see comment in <sys/procfs.h> 119 120#define MAX_PATH (2 * K) 121 122// for timer info max values which include all bits 123#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 124 125 126// Here are some liblgrp types from sys/lgrp_user.h to be able to 127// compile on older systems without this header file. 128 129#ifndef MADV_ACCESS_LWP 130 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 131#endif 132#ifndef MADV_ACCESS_MANY 133 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 134#endif 135 136#ifndef LGRP_RSRC_CPU 137 #define LGRP_RSRC_CPU 0 /* CPU resources */ 138#endif 139#ifndef LGRP_RSRC_MEM 140 #define LGRP_RSRC_MEM 1 /* memory resources */ 141#endif 142 143// Values for ThreadPriorityPolicy == 1 144int prio_policy1[CriticalPriority+1] = { 145 -99999, 0, 16, 32, 48, 64, 146 80, 96, 112, 124, 127, 127 }; 147 148// System parameters used internally 149static clock_t clock_tics_per_sec = 100; 150 151// Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 152static bool enabled_extended_FILE_stdio = false; 153 154// For diagnostics to print a message once. see run_periodic_checks 155static bool check_addr0_done = false; 156static sigset_t check_signal_done; 157static bool check_signals = true; 158 159address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 160address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 161 162address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 163 164os::Solaris::pthread_setname_np_func_t os::Solaris::_pthread_setname_np = NULL; 165 166// "default" initializers for missing libc APIs 167extern "C" { 168 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 169 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 170 171 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 172 static int lwp_cond_destroy(cond_t *cv) { return 0; } 173} 174 175// "default" initializers for pthread-based synchronization 176extern "C" { 177 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 178 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 179} 180 181static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); 182 183static inline size_t adjust_stack_size(address base, size_t size) { 184 if ((ssize_t)size < 0) { 185 // 4759953: Compensate for ridiculous stack size. 186 size = max_intx; 187 } 188 if (size > (size_t)base) { 189 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 190 size = (size_t)base; 191 } 192 return size; 193} 194 195static inline stack_t get_stack_info() { 196 stack_t st; 197 int retval = thr_stksegment(&st); 198 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 199 assert(retval == 0, "incorrect return value from thr_stksegment"); 200 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 201 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 202 return st; 203} 204 205address os::current_stack_base() { 206 int r = thr_main(); 207 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 208 bool is_primordial_thread = r; 209 210 // Workaround 4352906, avoid calls to thr_stksegment by 211 // thr_main after the first one (it looks like we trash 212 // some data, causing the value for ss_sp to be incorrect). 213 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 214 stack_t st = get_stack_info(); 215 if (is_primordial_thread) { 216 // cache initial value of stack base 217 os::Solaris::_main_stack_base = (address)st.ss_sp; 218 } 219 return (address)st.ss_sp; 220 } else { 221 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 222 return os::Solaris::_main_stack_base; 223 } 224} 225 226size_t os::current_stack_size() { 227 size_t size; 228 229 int r = thr_main(); 230 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 231 if (!r) { 232 size = get_stack_info().ss_size; 233 } else { 234 struct rlimit limits; 235 getrlimit(RLIMIT_STACK, &limits); 236 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 237 } 238 // base may not be page aligned 239 address base = current_stack_base(); 240 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 241 return (size_t)(base - bottom); 242} 243 244struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 245 return localtime_r(clock, res); 246} 247 248void os::Solaris::try_enable_extended_io() { 249 typedef int (*enable_extended_FILE_stdio_t)(int, int); 250 251 if (!UseExtendedFileIO) { 252 return; 253 } 254 255 enable_extended_FILE_stdio_t enabler = 256 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 257 "enable_extended_FILE_stdio"); 258 if (enabler) { 259 enabler(-1, -1); 260 } 261} 262 263static int _processors_online = 0; 264 265jint os::Solaris::_os_thread_limit = 0; 266volatile jint os::Solaris::_os_thread_count = 0; 267 268julong os::available_memory() { 269 return Solaris::available_memory(); 270} 271 272julong os::Solaris::available_memory() { 273 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 274} 275 276julong os::Solaris::_physical_memory = 0; 277 278julong os::physical_memory() { 279 return Solaris::physical_memory(); 280} 281 282static hrtime_t first_hrtime = 0; 283static const hrtime_t hrtime_hz = 1000*1000*1000; 284static volatile hrtime_t max_hrtime = 0; 285 286 287void os::Solaris::initialize_system_info() { 288 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 289 _processors_online = sysconf(_SC_NPROCESSORS_ONLN); 290 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * 291 (julong)sysconf(_SC_PAGESIZE); 292} 293 294int os::active_processor_count() { 295 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 296 pid_t pid = getpid(); 297 psetid_t pset = PS_NONE; 298 // Are we running in a processor set or is there any processor set around? 299 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 300 uint_t pset_cpus; 301 // Query the number of cpus available to us. 302 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 303 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 304 _processors_online = pset_cpus; 305 return pset_cpus; 306 } 307 } 308 // Otherwise return number of online cpus 309 return online_cpus; 310} 311 312static bool find_processors_in_pset(psetid_t pset, 313 processorid_t** id_array, 314 uint_t* id_length) { 315 bool result = false; 316 // Find the number of processors in the processor set. 317 if (pset_info(pset, NULL, id_length, NULL) == 0) { 318 // Make up an array to hold their ids. 319 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 320 // Fill in the array with their processor ids. 321 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 322 result = true; 323 } 324 } 325 return result; 326} 327 328// Callers of find_processors_online() must tolerate imprecise results -- 329// the system configuration can change asynchronously because of DR 330// or explicit psradm operations. 331// 332// We also need to take care that the loop (below) terminates as the 333// number of processors online can change between the _SC_NPROCESSORS_ONLN 334// request and the loop that builds the list of processor ids. Unfortunately 335// there's no reliable way to determine the maximum valid processor id, 336// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 337// man pages, which claim the processor id set is "sparse, but 338// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 339// exit the loop. 340// 341// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 342// not available on S8.0. 343 344static bool find_processors_online(processorid_t** id_array, 345 uint* id_length) { 346 const processorid_t MAX_PROCESSOR_ID = 100000; 347 // Find the number of processors online. 348 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 349 // Make up an array to hold their ids. 350 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 351 // Processors need not be numbered consecutively. 352 long found = 0; 353 processorid_t next = 0; 354 while (found < *id_length && next < MAX_PROCESSOR_ID) { 355 processor_info_t info; 356 if (processor_info(next, &info) == 0) { 357 // NB, PI_NOINTR processors are effectively online ... 358 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 359 (*id_array)[found] = next; 360 found += 1; 361 } 362 } 363 next += 1; 364 } 365 if (found < *id_length) { 366 // The loop above didn't identify the expected number of processors. 367 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 368 // and re-running the loop, above, but there's no guarantee of progress 369 // if the system configuration is in flux. Instead, we just return what 370 // we've got. Note that in the worst case find_processors_online() could 371 // return an empty set. (As a fall-back in the case of the empty set we 372 // could just return the ID of the current processor). 373 *id_length = found; 374 } 375 376 return true; 377} 378 379static bool assign_distribution(processorid_t* id_array, 380 uint id_length, 381 uint* distribution, 382 uint distribution_length) { 383 // We assume we can assign processorid_t's to uint's. 384 assert(sizeof(processorid_t) == sizeof(uint), 385 "can't convert processorid_t to uint"); 386 // Quick check to see if we won't succeed. 387 if (id_length < distribution_length) { 388 return false; 389 } 390 // Assign processor ids to the distribution. 391 // Try to shuffle processors to distribute work across boards, 392 // assuming 4 processors per board. 393 const uint processors_per_board = ProcessDistributionStride; 394 // Find the maximum processor id. 395 processorid_t max_id = 0; 396 for (uint m = 0; m < id_length; m += 1) { 397 max_id = MAX2(max_id, id_array[m]); 398 } 399 // The next id, to limit loops. 400 const processorid_t limit_id = max_id + 1; 401 // Make up markers for available processors. 402 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 403 for (uint c = 0; c < limit_id; c += 1) { 404 available_id[c] = false; 405 } 406 for (uint a = 0; a < id_length; a += 1) { 407 available_id[id_array[a]] = true; 408 } 409 // Step by "boards", then by "slot", copying to "assigned". 410 // NEEDS_CLEANUP: The assignment of processors should be stateful, 411 // remembering which processors have been assigned by 412 // previous calls, etc., so as to distribute several 413 // independent calls of this method. What we'd like is 414 // It would be nice to have an API that let us ask 415 // how many processes are bound to a processor, 416 // but we don't have that, either. 417 // In the short term, "board" is static so that 418 // subsequent distributions don't all start at board 0. 419 static uint board = 0; 420 uint assigned = 0; 421 // Until we've found enough processors .... 422 while (assigned < distribution_length) { 423 // ... find the next available processor in the board. 424 for (uint slot = 0; slot < processors_per_board; slot += 1) { 425 uint try_id = board * processors_per_board + slot; 426 if ((try_id < limit_id) && (available_id[try_id] == true)) { 427 distribution[assigned] = try_id; 428 available_id[try_id] = false; 429 assigned += 1; 430 break; 431 } 432 } 433 board += 1; 434 if (board * processors_per_board + 0 >= limit_id) { 435 board = 0; 436 } 437 } 438 if (available_id != NULL) { 439 FREE_C_HEAP_ARRAY(bool, available_id); 440 } 441 return true; 442} 443 444void os::set_native_thread_name(const char *name) { 445 if (Solaris::_pthread_setname_np != NULL) { 446 // Only the first 31 bytes of 'name' are processed by pthread_setname_np 447 // but we explicitly copy into a size-limited buffer to avoid any 448 // possible overflow. 449 char buf[32]; 450 snprintf(buf, sizeof(buf), "%s", name); 451 buf[sizeof(buf) - 1] = '\0'; 452 Solaris::_pthread_setname_np(pthread_self(), buf); 453 } 454} 455 456bool os::distribute_processes(uint length, uint* distribution) { 457 bool result = false; 458 // Find the processor id's of all the available CPUs. 459 processorid_t* id_array = NULL; 460 uint id_length = 0; 461 // There are some races between querying information and using it, 462 // since processor sets can change dynamically. 463 psetid_t pset = PS_NONE; 464 // Are we running in a processor set? 465 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 466 result = find_processors_in_pset(pset, &id_array, &id_length); 467 } else { 468 result = find_processors_online(&id_array, &id_length); 469 } 470 if (result == true) { 471 if (id_length >= length) { 472 result = assign_distribution(id_array, id_length, distribution, length); 473 } else { 474 result = false; 475 } 476 } 477 if (id_array != NULL) { 478 FREE_C_HEAP_ARRAY(processorid_t, id_array); 479 } 480 return result; 481} 482 483bool os::bind_to_processor(uint processor_id) { 484 // We assume that a processorid_t can be stored in a uint. 485 assert(sizeof(uint) == sizeof(processorid_t), 486 "can't convert uint to processorid_t"); 487 int bind_result = 488 processor_bind(P_LWPID, // bind LWP. 489 P_MYID, // bind current LWP. 490 (processorid_t) processor_id, // id. 491 NULL); // don't return old binding. 492 return (bind_result == 0); 493} 494 495// Return true if user is running as root. 496 497bool os::have_special_privileges() { 498 static bool init = false; 499 static bool privileges = false; 500 if (!init) { 501 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 502 init = true; 503 } 504 return privileges; 505} 506 507 508void os::init_system_properties_values() { 509 // The next steps are taken in the product version: 510 // 511 // Obtain the JAVA_HOME value from the location of libjvm.so. 512 // This library should be located at: 513 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 514 // 515 // If "/jre/lib/" appears at the right place in the path, then we 516 // assume libjvm.so is installed in a JDK and we use this path. 517 // 518 // Otherwise exit with message: "Could not create the Java virtual machine." 519 // 520 // The following extra steps are taken in the debugging version: 521 // 522 // If "/jre/lib/" does NOT appear at the right place in the path 523 // instead of exit check for $JAVA_HOME environment variable. 524 // 525 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 526 // then we append a fake suffix "hotspot/libjvm.so" to this path so 527 // it looks like libjvm.so is installed there 528 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 529 // 530 // Otherwise exit. 531 // 532 // Important note: if the location of libjvm.so changes this 533 // code needs to be changed accordingly. 534 535// Base path of extensions installed on the system. 536#define SYS_EXT_DIR "/usr/jdk/packages" 537#define EXTENSIONS_DIR "/lib/ext" 538 539 char cpu_arch[12]; 540 // Buffer that fits several sprintfs. 541 // Note that the space for the colon and the trailing null are provided 542 // by the nulls included by the sizeof operator. 543 const size_t bufsize = 544 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. 545 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path 546 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir 547 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); 548 549 // sysclasspath, java_home, dll_dir 550 { 551 char *pslash; 552 os::jvm_path(buf, bufsize); 553 554 // Found the full path to libjvm.so. 555 // Now cut the path to <java_home>/jre if we can. 556 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. 557 pslash = strrchr(buf, '/'); 558 if (pslash != NULL) { 559 *pslash = '\0'; // Get rid of /{client|server|hotspot}. 560 } 561 Arguments::set_dll_dir(buf); 562 563 if (pslash != NULL) { 564 pslash = strrchr(buf, '/'); 565 if (pslash != NULL) { 566 *pslash = '\0'; // Get rid of /<arch>. 567 pslash = strrchr(buf, '/'); 568 if (pslash != NULL) { 569 *pslash = '\0'; // Get rid of /lib. 570 } 571 } 572 } 573 Arguments::set_java_home(buf); 574 set_boot_path('/', ':'); 575 } 576 577 // Where to look for native libraries. 578 { 579 // Use dlinfo() to determine the correct java.library.path. 580 // 581 // If we're launched by the Java launcher, and the user 582 // does not set java.library.path explicitly on the commandline, 583 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 584 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 585 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 586 // /usr/lib), which is exactly what we want. 587 // 588 // If the user does set java.library.path, it completely 589 // overwrites this setting, and always has. 590 // 591 // If we're not launched by the Java launcher, we may 592 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 593 // settings. Again, dlinfo does exactly what we want. 594 595 Dl_serinfo info_sz, *info = &info_sz; 596 Dl_serpath *path; 597 char *library_path; 598 char *common_path = buf; 599 600 // Determine search path count and required buffer size. 601 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 602 FREE_C_HEAP_ARRAY(char, buf); 603 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 604 } 605 606 // Allocate new buffer and initialize. 607 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal); 608 info->dls_size = info_sz.dls_size; 609 info->dls_cnt = info_sz.dls_cnt; 610 611 // Obtain search path information. 612 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 613 FREE_C_HEAP_ARRAY(char, buf); 614 FREE_C_HEAP_ARRAY(char, info); 615 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 616 } 617 618 path = &info->dls_serpath[0]; 619 620 // Note: Due to a legacy implementation, most of the library path 621 // is set in the launcher. This was to accomodate linking restrictions 622 // on legacy Solaris implementations (which are no longer supported). 623 // Eventually, all the library path setting will be done here. 624 // 625 // However, to prevent the proliferation of improperly built native 626 // libraries, the new path component /usr/jdk/packages is added here. 627 628 // Determine the actual CPU architecture. 629 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 630#ifdef _LP64 631 // If we are a 64-bit vm, perform the following translations: 632 // sparc -> sparcv9 633 // i386 -> amd64 634 if (strcmp(cpu_arch, "sparc") == 0) { 635 strcat(cpu_arch, "v9"); 636 } else if (strcmp(cpu_arch, "i386") == 0) { 637 strcpy(cpu_arch, "amd64"); 638 } 639#endif 640 641 // Construct the invariant part of ld_library_path. 642 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch); 643 644 // Struct size is more than sufficient for the path components obtained 645 // through the dlinfo() call, so only add additional space for the path 646 // components explicitly added here. 647 size_t library_path_size = info->dls_size + strlen(common_path); 648 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal); 649 library_path[0] = '\0'; 650 651 // Construct the desired Java library path from the linker's library 652 // search path. 653 // 654 // For compatibility, it is optimal that we insert the additional path 655 // components specific to the Java VM after those components specified 656 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 657 // infrastructure. 658 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it. 659 strcpy(library_path, common_path); 660 } else { 661 int inserted = 0; 662 int i; 663 for (i = 0; i < info->dls_cnt; i++, path++) { 664 uint_t flags = path->dls_flags & LA_SER_MASK; 665 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 666 strcat(library_path, common_path); 667 strcat(library_path, os::path_separator()); 668 inserted = 1; 669 } 670 strcat(library_path, path->dls_name); 671 strcat(library_path, os::path_separator()); 672 } 673 // Eliminate trailing path separator. 674 library_path[strlen(library_path)-1] = '\0'; 675 } 676 677 // happens before argument parsing - can't use a trace flag 678 // tty->print_raw("init_system_properties_values: native lib path: "); 679 // tty->print_raw_cr(library_path); 680 681 // Callee copies into its own buffer. 682 Arguments::set_library_path(library_path); 683 684 FREE_C_HEAP_ARRAY(char, library_path); 685 FREE_C_HEAP_ARRAY(char, info); 686 } 687 688 // Extensions directories. 689 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); 690 Arguments::set_ext_dirs(buf); 691 692 FREE_C_HEAP_ARRAY(char, buf); 693 694#undef SYS_EXT_DIR 695#undef EXTENSIONS_DIR 696} 697 698void os::breakpoint() { 699 BREAKPOINT; 700} 701 702bool os::obsolete_option(const JavaVMOption *option) { 703 if (!strncmp(option->optionString, "-Xt", 3)) { 704 return true; 705 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 706 return true; 707 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 708 return true; 709 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 710 return true; 711 } 712 return false; 713} 714 715bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 716 address stackStart = (address)thread->stack_base(); 717 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 718 if (sp < stackStart && sp >= stackEnd) return true; 719 return false; 720} 721 722extern "C" void breakpoint() { 723 // use debugger to set breakpoint here 724} 725 726static thread_t main_thread; 727 728// Thread start routine for all new Java threads 729extern "C" void* java_start(void* thread_addr) { 730 // Try to randomize the cache line index of hot stack frames. 731 // This helps when threads of the same stack traces evict each other's 732 // cache lines. The threads can be either from the same JVM instance, or 733 // from different JVM instances. The benefit is especially true for 734 // processors with hyperthreading technology. 735 static int counter = 0; 736 int pid = os::current_process_id(); 737 alloca(((pid ^ counter++) & 7) * 128); 738 739 int prio; 740 Thread* thread = (Thread*)thread_addr; 741 742 thread->initialize_thread_current(); 743 744 OSThread* osthr = thread->osthread(); 745 746 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound 747 thread->_schedctl = (void *) schedctl_init(); 748 749 log_info(os, thread)("Thread is alive (tid: " UINTX_FORMAT ").", 750 os::current_thread_id()); 751 752 if (UseNUMA) { 753 int lgrp_id = os::numa_get_group_id(); 754 if (lgrp_id != -1) { 755 thread->set_lgrp_id(lgrp_id); 756 } 757 } 758 759 // If the creator called set priority before we started, 760 // we need to call set_native_priority now that we have an lwp. 761 // We used to get the priority from thr_getprio (we called 762 // thr_setprio way back in create_thread) and pass it to 763 // set_native_priority, but Solaris scales the priority 764 // in java_to_os_priority, so when we read it back here, 765 // we pass trash to set_native_priority instead of what's 766 // in java_to_os_priority. So we save the native priority 767 // in the osThread and recall it here. 768 769 if (osthr->thread_id() != -1) { 770 if (UseThreadPriorities) { 771 int prio = osthr->native_priority(); 772 if (ThreadPriorityVerbose) { 773 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 774 INTPTR_FORMAT ", setting priority: %d\n", 775 osthr->thread_id(), osthr->lwp_id(), prio); 776 } 777 os::set_native_priority(thread, prio); 778 } 779 } else if (ThreadPriorityVerbose) { 780 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 781 } 782 783 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 784 785 // initialize signal mask for this thread 786 os::Solaris::hotspot_sigmask(thread); 787 788 thread->run(); 789 790 // One less thread is executing 791 // When the VMThread gets here, the main thread may have already exited 792 // which frees the CodeHeap containing the Atomic::dec code 793 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 794 Atomic::dec(&os::Solaris::_os_thread_count); 795 } 796 797 log_info(os, thread)("Thread finished (tid: " UINTX_FORMAT ").", os::current_thread_id()); 798 799 if (UseDetachedThreads) { 800 thr_exit(NULL); 801 ShouldNotReachHere(); 802 } 803 return NULL; 804} 805 806static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 807 // Allocate the OSThread object 808 OSThread* osthread = new OSThread(NULL, NULL); 809 if (osthread == NULL) return NULL; 810 811 // Store info on the Solaris thread into the OSThread 812 osthread->set_thread_id(thread_id); 813 osthread->set_lwp_id(_lwp_self()); 814 thread->_schedctl = (void *) schedctl_init(); 815 816 if (UseNUMA) { 817 int lgrp_id = os::numa_get_group_id(); 818 if (lgrp_id != -1) { 819 thread->set_lgrp_id(lgrp_id); 820 } 821 } 822 823 if (ThreadPriorityVerbose) { 824 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 825 osthread->thread_id(), osthread->lwp_id()); 826 } 827 828 // Initial thread state is INITIALIZED, not SUSPENDED 829 osthread->set_state(INITIALIZED); 830 831 return osthread; 832} 833 834void os::Solaris::hotspot_sigmask(Thread* thread) { 835 //Save caller's signal mask 836 sigset_t sigmask; 837 pthread_sigmask(SIG_SETMASK, NULL, &sigmask); 838 OSThread *osthread = thread->osthread(); 839 osthread->set_caller_sigmask(sigmask); 840 841 pthread_sigmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 842 if (!ReduceSignalUsage) { 843 if (thread->is_VM_thread()) { 844 // Only the VM thread handles BREAK_SIGNAL ... 845 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); 846 } else { 847 // ... all other threads block BREAK_SIGNAL 848 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 849 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); 850 } 851 } 852} 853 854bool os::create_attached_thread(JavaThread* thread) { 855#ifdef ASSERT 856 thread->verify_not_published(); 857#endif 858 OSThread* osthread = create_os_thread(thread, thr_self()); 859 if (osthread == NULL) { 860 return false; 861 } 862 863 // Initial thread state is RUNNABLE 864 osthread->set_state(RUNNABLE); 865 thread->set_osthread(osthread); 866 867 // initialize signal mask for this thread 868 // and save the caller's signal mask 869 os::Solaris::hotspot_sigmask(thread); 870 871 log_info(os, thread)("Thread attached (tid: " UINTX_FORMAT ").", 872 os::current_thread_id()); 873 874 return true; 875} 876 877bool os::create_main_thread(JavaThread* thread) { 878#ifdef ASSERT 879 thread->verify_not_published(); 880#endif 881 if (_starting_thread == NULL) { 882 _starting_thread = create_os_thread(thread, main_thread); 883 if (_starting_thread == NULL) { 884 return false; 885 } 886 } 887 888 // The primodial thread is runnable from the start 889 _starting_thread->set_state(RUNNABLE); 890 891 thread->set_osthread(_starting_thread); 892 893 // initialize signal mask for this thread 894 // and save the caller's signal mask 895 os::Solaris::hotspot_sigmask(thread); 896 897 return true; 898} 899 900// Helper function to trace thread attributes, similar to os::Posix::describe_pthread_attr() 901static char* describe_thr_create_attributes(char* buf, size_t buflen, 902 size_t stacksize, long flags) { 903 stringStream ss(buf, buflen); 904 ss.print("stacksize: " SIZE_FORMAT "k, ", stacksize / 1024); 905 ss.print("flags: "); 906 #define PRINT_FLAG(f) if (flags & f) ss.print( #f " "); 907 #define ALL(X) \ 908 X(THR_SUSPENDED) \ 909 X(THR_DETACHED) \ 910 X(THR_BOUND) \ 911 X(THR_NEW_LWP) \ 912 X(THR_DAEMON) 913 ALL(PRINT_FLAG) 914 #undef ALL 915 #undef PRINT_FLAG 916 return buf; 917} 918 919bool os::create_thread(Thread* thread, ThreadType thr_type, 920 size_t stack_size) { 921 // Allocate the OSThread object 922 OSThread* osthread = new OSThread(NULL, NULL); 923 if (osthread == NULL) { 924 return false; 925 } 926 927 if (ThreadPriorityVerbose) { 928 char *thrtyp; 929 switch (thr_type) { 930 case vm_thread: 931 thrtyp = (char *)"vm"; 932 break; 933 case cgc_thread: 934 thrtyp = (char *)"cgc"; 935 break; 936 case pgc_thread: 937 thrtyp = (char *)"pgc"; 938 break; 939 case java_thread: 940 thrtyp = (char *)"java"; 941 break; 942 case compiler_thread: 943 thrtyp = (char *)"compiler"; 944 break; 945 case watcher_thread: 946 thrtyp = (char *)"watcher"; 947 break; 948 default: 949 thrtyp = (char *)"unknown"; 950 break; 951 } 952 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 953 } 954 955 // Calculate stack size if it's not specified by caller. 956 if (stack_size == 0) { 957 // The default stack size 1M (2M for LP64). 958 stack_size = (BytesPerWord >> 2) * K * K; 959 960 switch (thr_type) { 961 case os::java_thread: 962 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 963 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 964 break; 965 case os::compiler_thread: 966 if (CompilerThreadStackSize > 0) { 967 stack_size = (size_t)(CompilerThreadStackSize * K); 968 break; 969 } // else fall through: 970 // use VMThreadStackSize if CompilerThreadStackSize is not defined 971 case os::vm_thread: 972 case os::pgc_thread: 973 case os::cgc_thread: 974 case os::watcher_thread: 975 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 976 break; 977 } 978 } 979 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 980 981 // Initial state is ALLOCATED but not INITIALIZED 982 osthread->set_state(ALLOCATED); 983 984 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 985 // We got lots of threads. Check if we still have some address space left. 986 // Need to be at least 5Mb of unreserved address space. We do check by 987 // trying to reserve some. 988 const size_t VirtualMemoryBangSize = 20*K*K; 989 char* mem = os::reserve_memory(VirtualMemoryBangSize); 990 if (mem == NULL) { 991 delete osthread; 992 return false; 993 } else { 994 // Release the memory again 995 os::release_memory(mem, VirtualMemoryBangSize); 996 } 997 } 998 999 // Setup osthread because the child thread may need it. 1000 thread->set_osthread(osthread); 1001 1002 // Create the Solaris thread 1003 thread_t tid = 0; 1004 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED; 1005 int status; 1006 1007 // Mark that we don't have an lwp or thread id yet. 1008 // In case we attempt to set the priority before the thread starts. 1009 osthread->set_lwp_id(-1); 1010 osthread->set_thread_id(-1); 1011 1012 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1013 1014 char buf[64]; 1015 if (status == 0) { 1016 log_info(os, thread)("Thread started (tid: " UINTX_FORMAT ", attributes: %s). ", 1017 (uintx) tid, describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags)); 1018 } else { 1019 log_warning(os, thread)("Failed to start thread - thr_create failed (%s) for attributes: %s.", 1020 os::errno_name(status), describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags)); 1021 } 1022 1023 if (status != 0) { 1024 thread->set_osthread(NULL); 1025 // Need to clean up stuff we've allocated so far 1026 delete osthread; 1027 return false; 1028 } 1029 1030 Atomic::inc(&os::Solaris::_os_thread_count); 1031 1032 // Store info on the Solaris thread into the OSThread 1033 osthread->set_thread_id(tid); 1034 1035 // Remember that we created this thread so we can set priority on it 1036 osthread->set_vm_created(); 1037 1038 // Initial thread state is INITIALIZED, not SUSPENDED 1039 osthread->set_state(INITIALIZED); 1040 1041 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1042 return true; 1043} 1044 1045// defined for >= Solaris 10. This allows builds on earlier versions 1046// of Solaris to take advantage of the newly reserved Solaris JVM signals. 1047// With SIGJVM1, SIGJVM2, ASYNC_SIGNAL is SIGJVM2. Previously INTERRUPT_SIGNAL 1048// was SIGJVM1. 1049// 1050#if !defined(SIGJVM1) 1051 #define SIGJVM1 39 1052 #define SIGJVM2 40 1053#endif 1054 1055debug_only(static bool signal_sets_initialized = false); 1056static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1057 1058int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1059 1060bool os::Solaris::is_sig_ignored(int sig) { 1061 struct sigaction oact; 1062 sigaction(sig, (struct sigaction*)NULL, &oact); 1063 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1064 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1065 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) { 1066 return true; 1067 } else { 1068 return false; 1069 } 1070} 1071 1072// Note: SIGRTMIN is a macro that calls sysconf() so it will 1073// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1074static bool isJVM1available() { 1075 return SIGJVM1 < SIGRTMIN; 1076} 1077 1078void os::Solaris::signal_sets_init() { 1079 // Should also have an assertion stating we are still single-threaded. 1080 assert(!signal_sets_initialized, "Already initialized"); 1081 // Fill in signals that are necessarily unblocked for all threads in 1082 // the VM. Currently, we unblock the following signals: 1083 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1084 // by -Xrs (=ReduceSignalUsage)); 1085 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1086 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1087 // the dispositions or masks wrt these signals. 1088 // Programs embedding the VM that want to use the above signals for their 1089 // own purposes must, at this time, use the "-Xrs" option to prevent 1090 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1091 // (See bug 4345157, and other related bugs). 1092 // In reality, though, unblocking these signals is really a nop, since 1093 // these signals are not blocked by default. 1094 sigemptyset(&unblocked_sigs); 1095 sigemptyset(&allowdebug_blocked_sigs); 1096 sigaddset(&unblocked_sigs, SIGILL); 1097 sigaddset(&unblocked_sigs, SIGSEGV); 1098 sigaddset(&unblocked_sigs, SIGBUS); 1099 sigaddset(&unblocked_sigs, SIGFPE); 1100 1101 // Always true on Solaris 10+ 1102 guarantee(isJVM1available(), "SIGJVM1/2 missing!"); 1103 os::Solaris::set_SIGasync(SIGJVM2); 1104 1105 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1106 1107 if (!ReduceSignalUsage) { 1108 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1109 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1110 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1111 } 1112 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1113 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1114 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1115 } 1116 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1117 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1118 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1119 } 1120 } 1121 // Fill in signals that are blocked by all but the VM thread. 1122 sigemptyset(&vm_sigs); 1123 if (!ReduceSignalUsage) { 1124 sigaddset(&vm_sigs, BREAK_SIGNAL); 1125 } 1126 debug_only(signal_sets_initialized = true); 1127 1128 // For diagnostics only used in run_periodic_checks 1129 sigemptyset(&check_signal_done); 1130} 1131 1132// These are signals that are unblocked while a thread is running Java. 1133// (For some reason, they get blocked by default.) 1134sigset_t* os::Solaris::unblocked_signals() { 1135 assert(signal_sets_initialized, "Not initialized"); 1136 return &unblocked_sigs; 1137} 1138 1139// These are the signals that are blocked while a (non-VM) thread is 1140// running Java. Only the VM thread handles these signals. 1141sigset_t* os::Solaris::vm_signals() { 1142 assert(signal_sets_initialized, "Not initialized"); 1143 return &vm_sigs; 1144} 1145 1146// These are signals that are blocked during cond_wait to allow debugger in 1147sigset_t* os::Solaris::allowdebug_blocked_signals() { 1148 assert(signal_sets_initialized, "Not initialized"); 1149 return &allowdebug_blocked_sigs; 1150} 1151 1152 1153void _handle_uncaught_cxx_exception() { 1154 VMError::report_and_die("An uncaught C++ exception"); 1155} 1156 1157 1158// First crack at OS-specific initialization, from inside the new thread. 1159void os::initialize_thread(Thread* thr) { 1160 int r = thr_main(); 1161 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 1162 if (r) { 1163 JavaThread* jt = (JavaThread *)thr; 1164 assert(jt != NULL, "Sanity check"); 1165 size_t stack_size; 1166 address base = jt->stack_base(); 1167 if (Arguments::created_by_java_launcher()) { 1168 // Use 2MB to allow for Solaris 7 64 bit mode. 1169 stack_size = JavaThread::stack_size_at_create() == 0 1170 ? 2048*K : JavaThread::stack_size_at_create(); 1171 1172 // There are rare cases when we may have already used more than 1173 // the basic stack size allotment before this method is invoked. 1174 // Attempt to allow for a normally sized java_stack. 1175 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1176 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1177 } else { 1178 // 6269555: If we were not created by a Java launcher, i.e. if we are 1179 // running embedded in a native application, treat the primordial thread 1180 // as much like a native attached thread as possible. This means using 1181 // the current stack size from thr_stksegment(), unless it is too large 1182 // to reliably setup guard pages. A reasonable max size is 8MB. 1183 size_t current_size = current_stack_size(); 1184 // This should never happen, but just in case.... 1185 if (current_size == 0) current_size = 2 * K * K; 1186 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1187 } 1188 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1189 stack_size = (size_t)(base - bottom); 1190 1191 assert(stack_size > 0, "Stack size calculation problem"); 1192 1193 if (stack_size > jt->stack_size()) { 1194#ifndef PRODUCT 1195 struct rlimit limits; 1196 getrlimit(RLIMIT_STACK, &limits); 1197 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1198 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1199#endif 1200 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n" 1201 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1202 "See limit(1) to increase the stack size limit.", 1203 stack_size / K, jt->stack_size() / K); 1204 vm_exit(1); 1205 } 1206 assert(jt->stack_size() >= stack_size, 1207 "Attempt to map more stack than was allocated"); 1208 jt->set_stack_size(stack_size); 1209 } 1210 1211 // With the T2 libthread (T1 is no longer supported) threads are always bound 1212 // and we use stackbanging in all cases. 1213 1214 os::Solaris::init_thread_fpu_state(); 1215 std::set_terminate(_handle_uncaught_cxx_exception); 1216} 1217 1218 1219 1220// Free Solaris resources related to the OSThread 1221void os::free_thread(OSThread* osthread) { 1222 assert(osthread != NULL, "os::free_thread but osthread not set"); 1223 1224 1225 // We are told to free resources of the argument thread, 1226 // but we can only really operate on the current thread. 1227 // The main thread must take the VMThread down synchronously 1228 // before the main thread exits and frees up CodeHeap 1229 guarantee((Thread::current()->osthread() == osthread 1230 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1231 if (Thread::current()->osthread() == osthread) { 1232 // Restore caller's signal mask 1233 sigset_t sigmask = osthread->caller_sigmask(); 1234 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); 1235 } 1236 delete osthread; 1237} 1238 1239void os::pd_start_thread(Thread* thread) { 1240 int status = thr_continue(thread->osthread()->thread_id()); 1241 assert_status(status == 0, status, "thr_continue failed"); 1242} 1243 1244 1245intx os::current_thread_id() { 1246 return (intx)thr_self(); 1247} 1248 1249static pid_t _initial_pid = 0; 1250 1251int os::current_process_id() { 1252 return (int)(_initial_pid ? _initial_pid : getpid()); 1253} 1254 1255// gethrtime() should be monotonic according to the documentation, 1256// but some virtualized platforms are known to break this guarantee. 1257// getTimeNanos() must be guaranteed not to move backwards, so we 1258// are forced to add a check here. 1259inline hrtime_t getTimeNanos() { 1260 const hrtime_t now = gethrtime(); 1261 const hrtime_t prev = max_hrtime; 1262 if (now <= prev) { 1263 return prev; // same or retrograde time; 1264 } 1265 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1266 assert(obsv >= prev, "invariant"); // Monotonicity 1267 // If the CAS succeeded then we're done and return "now". 1268 // If the CAS failed and the observed value "obsv" is >= now then 1269 // we should return "obsv". If the CAS failed and now > obsv > prv then 1270 // some other thread raced this thread and installed a new value, in which case 1271 // we could either (a) retry the entire operation, (b) retry trying to install now 1272 // or (c) just return obsv. We use (c). No loop is required although in some cases 1273 // we might discard a higher "now" value in deference to a slightly lower but freshly 1274 // installed obsv value. That's entirely benign -- it admits no new orderings compared 1275 // to (a) or (b) -- and greatly reduces coherence traffic. 1276 // We might also condition (c) on the magnitude of the delta between obsv and now. 1277 // Avoiding excessive CAS operations to hot RW locations is critical. 1278 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate 1279 return (prev == obsv) ? now : obsv; 1280} 1281 1282// Time since start-up in seconds to a fine granularity. 1283// Used by VMSelfDestructTimer and the MemProfiler. 1284double os::elapsedTime() { 1285 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1286} 1287 1288jlong os::elapsed_counter() { 1289 return (jlong)(getTimeNanos() - first_hrtime); 1290} 1291 1292jlong os::elapsed_frequency() { 1293 return hrtime_hz; 1294} 1295 1296// Return the real, user, and system times in seconds from an 1297// arbitrary fixed point in the past. 1298bool os::getTimesSecs(double* process_real_time, 1299 double* process_user_time, 1300 double* process_system_time) { 1301 struct tms ticks; 1302 clock_t real_ticks = times(&ticks); 1303 1304 if (real_ticks == (clock_t) (-1)) { 1305 return false; 1306 } else { 1307 double ticks_per_second = (double) clock_tics_per_sec; 1308 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1309 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1310 // For consistency return the real time from getTimeNanos() 1311 // converted to seconds. 1312 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1313 1314 return true; 1315 } 1316} 1317 1318bool os::supports_vtime() { return true; } 1319 1320bool os::enable_vtime() { 1321 int fd = ::open("/proc/self/ctl", O_WRONLY); 1322 if (fd == -1) { 1323 return false; 1324 } 1325 1326 long cmd[] = { PCSET, PR_MSACCT }; 1327 int res = ::write(fd, cmd, sizeof(long) * 2); 1328 ::close(fd); 1329 if (res != sizeof(long) * 2) { 1330 return false; 1331 } 1332 return true; 1333} 1334 1335bool os::vtime_enabled() { 1336 int fd = ::open("/proc/self/status", O_RDONLY); 1337 if (fd == -1) { 1338 return false; 1339 } 1340 1341 pstatus_t status; 1342 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1343 ::close(fd); 1344 if (res != sizeof(pstatus_t)) { 1345 return false; 1346 } 1347 return status.pr_flags & PR_MSACCT; 1348} 1349 1350double os::elapsedVTime() { 1351 return (double)gethrvtime() / (double)hrtime_hz; 1352} 1353 1354// Used internally for comparisons only 1355// getTimeMillis guaranteed to not move backwards on Solaris 1356jlong getTimeMillis() { 1357 jlong nanotime = getTimeNanos(); 1358 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1359} 1360 1361// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1362jlong os::javaTimeMillis() { 1363 timeval t; 1364 if (gettimeofday(&t, NULL) == -1) { 1365 fatal("os::javaTimeMillis: gettimeofday (%s)", os::strerror(errno)); 1366 } 1367 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1368} 1369 1370void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) { 1371 timeval t; 1372 if (gettimeofday(&t, NULL) == -1) { 1373 fatal("os::javaTimeSystemUTC: gettimeofday (%s)", os::strerror(errno)); 1374 } 1375 seconds = jlong(t.tv_sec); 1376 nanos = jlong(t.tv_usec) * 1000; 1377} 1378 1379 1380jlong os::javaTimeNanos() { 1381 return (jlong)getTimeNanos(); 1382} 1383 1384void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1385 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1386 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1387 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1388 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1389} 1390 1391char * os::local_time_string(char *buf, size_t buflen) { 1392 struct tm t; 1393 time_t long_time; 1394 time(&long_time); 1395 localtime_r(&long_time, &t); 1396 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1397 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1398 t.tm_hour, t.tm_min, t.tm_sec); 1399 return buf; 1400} 1401 1402// Note: os::shutdown() might be called very early during initialization, or 1403// called from signal handler. Before adding something to os::shutdown(), make 1404// sure it is async-safe and can handle partially initialized VM. 1405void os::shutdown() { 1406 1407 // allow PerfMemory to attempt cleanup of any persistent resources 1408 perfMemory_exit(); 1409 1410 // needs to remove object in file system 1411 AttachListener::abort(); 1412 1413 // flush buffered output, finish log files 1414 ostream_abort(); 1415 1416 // Check for abort hook 1417 abort_hook_t abort_hook = Arguments::abort_hook(); 1418 if (abort_hook != NULL) { 1419 abort_hook(); 1420 } 1421} 1422 1423// Note: os::abort() might be called very early during initialization, or 1424// called from signal handler. Before adding something to os::abort(), make 1425// sure it is async-safe and can handle partially initialized VM. 1426void os::abort(bool dump_core, void* siginfo, const void* context) { 1427 os::shutdown(); 1428 if (dump_core) { 1429#ifndef PRODUCT 1430 fdStream out(defaultStream::output_fd()); 1431 out.print_raw("Current thread is "); 1432 char buf[16]; 1433 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1434 out.print_raw_cr(buf); 1435 out.print_raw_cr("Dumping core ..."); 1436#endif 1437 ::abort(); // dump core (for debugging) 1438 } 1439 1440 ::exit(1); 1441} 1442 1443// Die immediately, no exit hook, no abort hook, no cleanup. 1444void os::die() { 1445 ::abort(); // dump core (for debugging) 1446} 1447 1448// DLL functions 1449 1450const char* os::dll_file_extension() { return ".so"; } 1451 1452// This must be hard coded because it's the system's temporary 1453// directory not the java application's temp directory, ala java.io.tmpdir. 1454const char* os::get_temp_directory() { return "/tmp"; } 1455 1456static bool file_exists(const char* filename) { 1457 struct stat statbuf; 1458 if (filename == NULL || strlen(filename) == 0) { 1459 return false; 1460 } 1461 return os::stat(filename, &statbuf) == 0; 1462} 1463 1464bool os::dll_build_name(char* buffer, size_t buflen, 1465 const char* pname, const char* fname) { 1466 bool retval = false; 1467 const size_t pnamelen = pname ? strlen(pname) : 0; 1468 1469 // Return error on buffer overflow. 1470 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1471 return retval; 1472 } 1473 1474 if (pnamelen == 0) { 1475 snprintf(buffer, buflen, "lib%s.so", fname); 1476 retval = true; 1477 } else if (strchr(pname, *os::path_separator()) != NULL) { 1478 int n; 1479 char** pelements = split_path(pname, &n); 1480 if (pelements == NULL) { 1481 return false; 1482 } 1483 for (int i = 0; i < n; i++) { 1484 // really shouldn't be NULL but what the heck, check can't hurt 1485 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1486 continue; // skip the empty path values 1487 } 1488 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1489 if (file_exists(buffer)) { 1490 retval = true; 1491 break; 1492 } 1493 } 1494 // release the storage 1495 for (int i = 0; i < n; i++) { 1496 if (pelements[i] != NULL) { 1497 FREE_C_HEAP_ARRAY(char, pelements[i]); 1498 } 1499 } 1500 if (pelements != NULL) { 1501 FREE_C_HEAP_ARRAY(char*, pelements); 1502 } 1503 } else { 1504 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1505 retval = true; 1506 } 1507 return retval; 1508} 1509 1510// check if addr is inside libjvm.so 1511bool os::address_is_in_vm(address addr) { 1512 static address libjvm_base_addr; 1513 Dl_info dlinfo; 1514 1515 if (libjvm_base_addr == NULL) { 1516 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { 1517 libjvm_base_addr = (address)dlinfo.dli_fbase; 1518 } 1519 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1520 } 1521 1522 if (dladdr((void *)addr, &dlinfo) != 0) { 1523 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1524 } 1525 1526 return false; 1527} 1528 1529typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int); 1530static dladdr1_func_type dladdr1_func = NULL; 1531 1532bool os::dll_address_to_function_name(address addr, char *buf, 1533 int buflen, int * offset, 1534 bool demangle) { 1535 // buf is not optional, but offset is optional 1536 assert(buf != NULL, "sanity check"); 1537 1538 Dl_info dlinfo; 1539 1540 // dladdr1_func was initialized in os::init() 1541 if (dladdr1_func != NULL) { 1542 // yes, we have dladdr1 1543 1544 // Support for dladdr1 is checked at runtime; it may be 1545 // available even if the vm is built on a machine that does 1546 // not have dladdr1 support. Make sure there is a value for 1547 // RTLD_DL_SYMENT. 1548#ifndef RTLD_DL_SYMENT 1549 #define RTLD_DL_SYMENT 1 1550#endif 1551#ifdef _LP64 1552 Elf64_Sym * info; 1553#else 1554 Elf32_Sym * info; 1555#endif 1556 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1557 RTLD_DL_SYMENT) != 0) { 1558 // see if we have a matching symbol that covers our address 1559 if (dlinfo.dli_saddr != NULL && 1560 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1561 if (dlinfo.dli_sname != NULL) { 1562 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1563 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1564 } 1565 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1566 return true; 1567 } 1568 } 1569 // no matching symbol so try for just file info 1570 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1571 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1572 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1573 return true; 1574 } 1575 } 1576 } 1577 buf[0] = '\0'; 1578 if (offset != NULL) *offset = -1; 1579 return false; 1580 } 1581 1582 // no, only dladdr is available 1583 if (dladdr((void *)addr, &dlinfo) != 0) { 1584 // see if we have a matching symbol 1585 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { 1586 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1587 jio_snprintf(buf, buflen, dlinfo.dli_sname); 1588 } 1589 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1590 return true; 1591 } 1592 // no matching symbol so try for just file info 1593 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1594 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1595 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1596 return true; 1597 } 1598 } 1599 } 1600 buf[0] = '\0'; 1601 if (offset != NULL) *offset = -1; 1602 return false; 1603} 1604 1605bool os::dll_address_to_library_name(address addr, char* buf, 1606 int buflen, int* offset) { 1607 // buf is not optional, but offset is optional 1608 assert(buf != NULL, "sanity check"); 1609 1610 Dl_info dlinfo; 1611 1612 if (dladdr((void*)addr, &dlinfo) != 0) { 1613 if (dlinfo.dli_fname != NULL) { 1614 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1615 } 1616 if (dlinfo.dli_fbase != NULL && offset != NULL) { 1617 *offset = addr - (address)dlinfo.dli_fbase; 1618 } 1619 return true; 1620 } 1621 1622 buf[0] = '\0'; 1623 if (offset) *offset = -1; 1624 return false; 1625} 1626 1627int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) { 1628 Dl_info dli; 1629 // Sanity check? 1630 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 || 1631 dli.dli_fname == NULL) { 1632 return 1; 1633 } 1634 1635 void * handle = dlopen(dli.dli_fname, RTLD_LAZY); 1636 if (handle == NULL) { 1637 return 1; 1638 } 1639 1640 Link_map *map; 1641 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1642 if (map == NULL) { 1643 dlclose(handle); 1644 return 1; 1645 } 1646 1647 while (map->l_prev != NULL) { 1648 map = map->l_prev; 1649 } 1650 1651 while (map != NULL) { 1652 // Iterate through all map entries and call callback with fields of interest 1653 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) { 1654 dlclose(handle); 1655 return 1; 1656 } 1657 map = map->l_next; 1658 } 1659 1660 dlclose(handle); 1661 return 0; 1662} 1663 1664int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) { 1665 outputStream * out = (outputStream *) param; 1666 out->print_cr(PTR_FORMAT " \t%s", base_address, name); 1667 return 0; 1668} 1669 1670void os::print_dll_info(outputStream * st) { 1671 st->print_cr("Dynamic libraries:"); st->flush(); 1672 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) { 1673 st->print_cr("Error: Cannot print dynamic libraries."); 1674 } 1675} 1676 1677// Loads .dll/.so and 1678// in case of error it checks if .dll/.so was built for the 1679// same architecture as Hotspot is running on 1680 1681void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { 1682 void * result= ::dlopen(filename, RTLD_LAZY); 1683 if (result != NULL) { 1684 // Successful loading 1685 return result; 1686 } 1687 1688 Elf32_Ehdr elf_head; 1689 1690 // Read system error message into ebuf 1691 // It may or may not be overwritten below 1692 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1693 ebuf[ebuflen-1]='\0'; 1694 int diag_msg_max_length=ebuflen-strlen(ebuf); 1695 char* diag_msg_buf=ebuf+strlen(ebuf); 1696 1697 if (diag_msg_max_length==0) { 1698 // No more space in ebuf for additional diagnostics message 1699 return NULL; 1700 } 1701 1702 1703 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1704 1705 if (file_descriptor < 0) { 1706 // Can't open library, report dlerror() message 1707 return NULL; 1708 } 1709 1710 bool failed_to_read_elf_head= 1711 (sizeof(elf_head)!= 1712 (::read(file_descriptor, &elf_head,sizeof(elf_head)))); 1713 1714 ::close(file_descriptor); 1715 if (failed_to_read_elf_head) { 1716 // file i/o error - report dlerror() msg 1717 return NULL; 1718 } 1719 1720 typedef struct { 1721 Elf32_Half code; // Actual value as defined in elf.h 1722 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1723 char elf_class; // 32 or 64 bit 1724 char endianess; // MSB or LSB 1725 char* name; // String representation 1726 } arch_t; 1727 1728 static const arch_t arch_array[]={ 1729 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1730 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1731 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1732 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1733 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1734 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1735 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1736 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1737 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 1738 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 1739 }; 1740 1741#if (defined IA32) 1742 static Elf32_Half running_arch_code=EM_386; 1743#elif (defined AMD64) 1744 static Elf32_Half running_arch_code=EM_X86_64; 1745#elif (defined IA64) 1746 static Elf32_Half running_arch_code=EM_IA_64; 1747#elif (defined __sparc) && (defined _LP64) 1748 static Elf32_Half running_arch_code=EM_SPARCV9; 1749#elif (defined __sparc) && (!defined _LP64) 1750 static Elf32_Half running_arch_code=EM_SPARC; 1751#elif (defined __powerpc64__) 1752 static Elf32_Half running_arch_code=EM_PPC64; 1753#elif (defined __powerpc__) 1754 static Elf32_Half running_arch_code=EM_PPC; 1755#elif (defined ARM) 1756 static Elf32_Half running_arch_code=EM_ARM; 1757#else 1758 #error Method os::dll_load requires that one of following is defined:\ 1759 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 1760#endif 1761 1762 // Identify compatability class for VM's architecture and library's architecture 1763 // Obtain string descriptions for architectures 1764 1765 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1766 int running_arch_index=-1; 1767 1768 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) { 1769 if (running_arch_code == arch_array[i].code) { 1770 running_arch_index = i; 1771 } 1772 if (lib_arch.code == arch_array[i].code) { 1773 lib_arch.compat_class = arch_array[i].compat_class; 1774 lib_arch.name = arch_array[i].name; 1775 } 1776 } 1777 1778 assert(running_arch_index != -1, 1779 "Didn't find running architecture code (running_arch_code) in arch_array"); 1780 if (running_arch_index == -1) { 1781 // Even though running architecture detection failed 1782 // we may still continue with reporting dlerror() message 1783 return NULL; 1784 } 1785 1786 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 1787 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 1788 return NULL; 1789 } 1790 1791 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 1792 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 1793 return NULL; 1794 } 1795 1796 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 1797 if (lib_arch.name!=NULL) { 1798 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1799 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 1800 lib_arch.name, arch_array[running_arch_index].name); 1801 } else { 1802 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1803 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 1804 lib_arch.code, 1805 arch_array[running_arch_index].name); 1806 } 1807 } 1808 1809 return NULL; 1810} 1811 1812void* os::dll_lookup(void* handle, const char* name) { 1813 return dlsym(handle, name); 1814} 1815 1816void* os::get_default_process_handle() { 1817 return (void*)::dlopen(NULL, RTLD_LAZY); 1818} 1819 1820int os::stat(const char *path, struct stat *sbuf) { 1821 char pathbuf[MAX_PATH]; 1822 if (strlen(path) > MAX_PATH - 1) { 1823 errno = ENAMETOOLONG; 1824 return -1; 1825 } 1826 os::native_path(strcpy(pathbuf, path)); 1827 return ::stat(pathbuf, sbuf); 1828} 1829 1830static bool _print_ascii_file(const char* filename, outputStream* st) { 1831 int fd = ::open(filename, O_RDONLY); 1832 if (fd == -1) { 1833 return false; 1834 } 1835 1836 char buf[32]; 1837 int bytes; 1838 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 1839 st->print_raw(buf, bytes); 1840 } 1841 1842 ::close(fd); 1843 1844 return true; 1845} 1846 1847void os::print_os_info_brief(outputStream* st) { 1848 os::Solaris::print_distro_info(st); 1849 1850 os::Posix::print_uname_info(st); 1851 1852 os::Solaris::print_libversion_info(st); 1853} 1854 1855void os::print_os_info(outputStream* st) { 1856 st->print("OS:"); 1857 1858 os::Solaris::print_distro_info(st); 1859 1860 os::Posix::print_uname_info(st); 1861 1862 os::Solaris::print_libversion_info(st); 1863 1864 os::Posix::print_rlimit_info(st); 1865 1866 os::Posix::print_load_average(st); 1867} 1868 1869void os::Solaris::print_distro_info(outputStream* st) { 1870 if (!_print_ascii_file("/etc/release", st)) { 1871 st->print("Solaris"); 1872 } 1873 st->cr(); 1874} 1875 1876void os::get_summary_os_info(char* buf, size_t buflen) { 1877 strncpy(buf, "Solaris", buflen); // default to plain solaris 1878 FILE* fp = fopen("/etc/release", "r"); 1879 if (fp != NULL) { 1880 char tmp[256]; 1881 // Only get the first line and chop out everything but the os name. 1882 if (fgets(tmp, sizeof(tmp), fp)) { 1883 char* ptr = tmp; 1884 // skip past whitespace characters 1885 while (*ptr != '\0' && (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')) ptr++; 1886 if (*ptr != '\0') { 1887 char* nl = strchr(ptr, '\n'); 1888 if (nl != NULL) *nl = '\0'; 1889 strncpy(buf, ptr, buflen); 1890 } 1891 } 1892 fclose(fp); 1893 } 1894} 1895 1896void os::Solaris::print_libversion_info(outputStream* st) { 1897 st->print(" (T2 libthread)"); 1898 st->cr(); 1899} 1900 1901static bool check_addr0(outputStream* st) { 1902 jboolean status = false; 1903 const int read_chunk = 200; 1904 int ret = 0; 1905 int nmap = 0; 1906 int fd = ::open("/proc/self/map",O_RDONLY); 1907 if (fd >= 0) { 1908 prmap_t *p = NULL; 1909 char *mbuff = (char *) calloc(read_chunk, sizeof(prmap_t)); 1910 if (NULL == mbuff) { 1911 ::close(fd); 1912 return status; 1913 } 1914 while ((ret = ::read(fd, mbuff, read_chunk*sizeof(prmap_t))) > 0) { 1915 //check if read() has not read partial data 1916 if( 0 != ret % sizeof(prmap_t)){ 1917 break; 1918 } 1919 nmap = ret / sizeof(prmap_t); 1920 p = (prmap_t *)mbuff; 1921 for(int i = 0; i < nmap; i++){ 1922 if (p->pr_vaddr == 0x0) { 1923 st->print("Warning: Address: " PTR_FORMAT ", Size: " SIZE_FORMAT "K, ",p->pr_vaddr, p->pr_size/1024); 1924 st->print("Mapped file: %s, ", p->pr_mapname[0] == '\0' ? "None" : p->pr_mapname); 1925 st->print("Access: "); 1926 st->print("%s",(p->pr_mflags & MA_READ) ? "r" : "-"); 1927 st->print("%s",(p->pr_mflags & MA_WRITE) ? "w" : "-"); 1928 st->print("%s",(p->pr_mflags & MA_EXEC) ? "x" : "-"); 1929 st->cr(); 1930 status = true; 1931 } 1932 p++; 1933 } 1934 } 1935 free(mbuff); 1936 ::close(fd); 1937 } 1938 return status; 1939} 1940 1941void os::get_summary_cpu_info(char* buf, size_t buflen) { 1942 // Get MHz with system call. We don't seem to already have this. 1943 processor_info_t stats; 1944 processorid_t id = getcpuid(); 1945 int clock = 0; 1946 if (processor_info(id, &stats) != -1) { 1947 clock = stats.pi_clock; // pi_processor_type isn't more informative than below 1948 } 1949#ifdef AMD64 1950 snprintf(buf, buflen, "x86 64 bit %d MHz", clock); 1951#else 1952 // must be sparc 1953 snprintf(buf, buflen, "Sparcv9 64 bit %d MHz", clock); 1954#endif 1955} 1956 1957void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) { 1958 // Nothing to do for now. 1959} 1960 1961void os::print_memory_info(outputStream* st) { 1962 st->print("Memory:"); 1963 st->print(" %dk page", os::vm_page_size()>>10); 1964 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 1965 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 1966 st->cr(); 1967 (void) check_addr0(st); 1968} 1969 1970// Moved from whole group, because we need them here for diagnostic 1971// prints. 1972#define OLDMAXSIGNUM 32 1973static int Maxsignum = 0; 1974static int *ourSigFlags = NULL; 1975 1976int os::Solaris::get_our_sigflags(int sig) { 1977 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1978 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1979 return ourSigFlags[sig]; 1980} 1981 1982void os::Solaris::set_our_sigflags(int sig, int flags) { 1983 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1984 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1985 ourSigFlags[sig] = flags; 1986} 1987 1988 1989static const char* get_signal_handler_name(address handler, 1990 char* buf, int buflen) { 1991 int offset; 1992 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 1993 if (found) { 1994 // skip directory names 1995 const char *p1, *p2; 1996 p1 = buf; 1997 size_t len = strlen(os::file_separator()); 1998 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 1999 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2000 } else { 2001 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2002 } 2003 return buf; 2004} 2005 2006static void print_signal_handler(outputStream* st, int sig, 2007 char* buf, size_t buflen) { 2008 struct sigaction sa; 2009 2010 sigaction(sig, NULL, &sa); 2011 2012 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2013 2014 address handler = (sa.sa_flags & SA_SIGINFO) 2015 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2016 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2017 2018 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2019 st->print("SIG_DFL"); 2020 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2021 st->print("SIG_IGN"); 2022 } else { 2023 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2024 } 2025 2026 st->print(", sa_mask[0]="); 2027 os::Posix::print_signal_set_short(st, &sa.sa_mask); 2028 2029 address rh = VMError::get_resetted_sighandler(sig); 2030 // May be, handler was resetted by VMError? 2031 if (rh != NULL) { 2032 handler = rh; 2033 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2034 } 2035 2036 st->print(", sa_flags="); 2037 os::Posix::print_sa_flags(st, sa.sa_flags); 2038 2039 // Check: is it our handler? 2040 if (handler == CAST_FROM_FN_PTR(address, signalHandler)) { 2041 // It is our signal handler 2042 // check for flags 2043 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2044 st->print( 2045 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2046 os::Solaris::get_our_sigflags(sig)); 2047 } 2048 } 2049 st->cr(); 2050} 2051 2052void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2053 st->print_cr("Signal Handlers:"); 2054 print_signal_handler(st, SIGSEGV, buf, buflen); 2055 print_signal_handler(st, SIGBUS , buf, buflen); 2056 print_signal_handler(st, SIGFPE , buf, buflen); 2057 print_signal_handler(st, SIGPIPE, buf, buflen); 2058 print_signal_handler(st, SIGXFSZ, buf, buflen); 2059 print_signal_handler(st, SIGILL , buf, buflen); 2060 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2061 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2062 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2063 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2064 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2065 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2066} 2067 2068static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2069 2070// Find the full path to the current module, libjvm.so 2071void os::jvm_path(char *buf, jint buflen) { 2072 // Error checking. 2073 if (buflen < MAXPATHLEN) { 2074 assert(false, "must use a large-enough buffer"); 2075 buf[0] = '\0'; 2076 return; 2077 } 2078 // Lazy resolve the path to current module. 2079 if (saved_jvm_path[0] != 0) { 2080 strcpy(buf, saved_jvm_path); 2081 return; 2082 } 2083 2084 Dl_info dlinfo; 2085 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2086 assert(ret != 0, "cannot locate libjvm"); 2087 if (ret != 0 && dlinfo.dli_fname != NULL) { 2088 realpath((char *)dlinfo.dli_fname, buf); 2089 } else { 2090 buf[0] = '\0'; 2091 return; 2092 } 2093 2094 if (Arguments::sun_java_launcher_is_altjvm()) { 2095 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical 2096 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". 2097 // If "/jre/lib/" appears at the right place in the string, then 2098 // assume we are installed in a JDK and we're done. Otherwise, check 2099 // for a JAVA_HOME environment variable and fix up the path so it 2100 // looks like libjvm.so is installed there (append a fake suffix 2101 // hotspot/libjvm.so). 2102 const char *p = buf + strlen(buf) - 1; 2103 for (int count = 0; p > buf && count < 5; ++count) { 2104 for (--p; p > buf && *p != '/'; --p) 2105 /* empty */ ; 2106 } 2107 2108 if (strncmp(p, "/jre/lib/", 9) != 0) { 2109 // Look for JAVA_HOME in the environment. 2110 char* java_home_var = ::getenv("JAVA_HOME"); 2111 if (java_home_var != NULL && java_home_var[0] != 0) { 2112 char cpu_arch[12]; 2113 char* jrelib_p; 2114 int len; 2115 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2116#ifdef _LP64 2117 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2118 if (strcmp(cpu_arch, "sparc") == 0) { 2119 strcat(cpu_arch, "v9"); 2120 } else if (strcmp(cpu_arch, "i386") == 0) { 2121 strcpy(cpu_arch, "amd64"); 2122 } 2123#endif 2124 // Check the current module name "libjvm.so". 2125 p = strrchr(buf, '/'); 2126 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2127 2128 realpath(java_home_var, buf); 2129 // determine if this is a legacy image or modules image 2130 // modules image doesn't have "jre" subdirectory 2131 len = strlen(buf); 2132 assert(len < buflen, "Ran out of buffer space"); 2133 jrelib_p = buf + len; 2134 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2135 if (0 != access(buf, F_OK)) { 2136 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2137 } 2138 2139 if (0 == access(buf, F_OK)) { 2140 // Use current module name "libjvm.so" 2141 len = strlen(buf); 2142 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2143 } else { 2144 // Go back to path of .so 2145 realpath((char *)dlinfo.dli_fname, buf); 2146 } 2147 } 2148 } 2149 } 2150 2151 strncpy(saved_jvm_path, buf, MAXPATHLEN); 2152 saved_jvm_path[MAXPATHLEN - 1] = '\0'; 2153} 2154 2155 2156void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2157 // no prefix required, not even "_" 2158} 2159 2160 2161void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2162 // no suffix required 2163} 2164 2165// This method is a copy of JDK's sysGetLastErrorString 2166// from src/solaris/hpi/src/system_md.c 2167 2168size_t os::lasterror(char *buf, size_t len) { 2169 if (errno == 0) return 0; 2170 2171 const char *s = os::strerror(errno); 2172 size_t n = ::strlen(s); 2173 if (n >= len) { 2174 n = len - 1; 2175 } 2176 ::strncpy(buf, s, n); 2177 buf[n] = '\0'; 2178 return n; 2179} 2180 2181 2182// sun.misc.Signal 2183 2184extern "C" { 2185 static void UserHandler(int sig, void *siginfo, void *context) { 2186 // Ctrl-C is pressed during error reporting, likely because the error 2187 // handler fails to abort. Let VM die immediately. 2188 if (sig == SIGINT && is_error_reported()) { 2189 os::die(); 2190 } 2191 2192 os::signal_notify(sig); 2193 // We do not need to reinstate the signal handler each time... 2194 } 2195} 2196 2197void* os::user_handler() { 2198 return CAST_FROM_FN_PTR(void*, UserHandler); 2199} 2200 2201struct timespec PosixSemaphore::create_timespec(unsigned int sec, int nsec) { 2202 struct timespec ts; 2203 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2204 2205 return ts; 2206} 2207 2208extern "C" { 2209 typedef void (*sa_handler_t)(int); 2210 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2211} 2212 2213void* os::signal(int signal_number, void* handler) { 2214 struct sigaction sigAct, oldSigAct; 2215 sigfillset(&(sigAct.sa_mask)); 2216 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2217 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2218 2219 if (sigaction(signal_number, &sigAct, &oldSigAct)) { 2220 // -1 means registration failed 2221 return (void *)-1; 2222 } 2223 2224 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2225} 2226 2227void os::signal_raise(int signal_number) { 2228 raise(signal_number); 2229} 2230 2231// The following code is moved from os.cpp for making this 2232// code platform specific, which it is by its very nature. 2233 2234// a counter for each possible signal value 2235static int Sigexit = 0; 2236static int Maxlibjsigsigs; 2237static jint *pending_signals = NULL; 2238static int *preinstalled_sigs = NULL; 2239static struct sigaction *chainedsigactions = NULL; 2240static sema_t sig_sem; 2241typedef int (*version_getting_t)(); 2242version_getting_t os::Solaris::get_libjsig_version = NULL; 2243static int libjsigversion = NULL; 2244 2245int os::sigexitnum_pd() { 2246 assert(Sigexit > 0, "signal memory not yet initialized"); 2247 return Sigexit; 2248} 2249 2250void os::Solaris::init_signal_mem() { 2251 // Initialize signal structures 2252 Maxsignum = SIGRTMAX; 2253 Sigexit = Maxsignum+1; 2254 assert(Maxsignum >0, "Unable to obtain max signal number"); 2255 2256 Maxlibjsigsigs = Maxsignum; 2257 2258 // pending_signals has one int per signal 2259 // The additional signal is for SIGEXIT - exit signal to signal_thread 2260 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2261 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2262 2263 if (UseSignalChaining) { 2264 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2265 * (Maxsignum + 1), mtInternal); 2266 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2267 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2268 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2269 } 2270 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2271 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2272} 2273 2274void os::signal_init_pd() { 2275 int ret; 2276 2277 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2278 assert(ret == 0, "sema_init() failed"); 2279} 2280 2281void os::signal_notify(int signal_number) { 2282 int ret; 2283 2284 Atomic::inc(&pending_signals[signal_number]); 2285 ret = ::sema_post(&sig_sem); 2286 assert(ret == 0, "sema_post() failed"); 2287} 2288 2289static int check_pending_signals(bool wait_for_signal) { 2290 int ret; 2291 while (true) { 2292 for (int i = 0; i < Sigexit + 1; i++) { 2293 jint n = pending_signals[i]; 2294 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2295 return i; 2296 } 2297 } 2298 if (!wait_for_signal) { 2299 return -1; 2300 } 2301 JavaThread *thread = JavaThread::current(); 2302 ThreadBlockInVM tbivm(thread); 2303 2304 bool threadIsSuspended; 2305 do { 2306 thread->set_suspend_equivalent(); 2307 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2308 while ((ret = ::sema_wait(&sig_sem)) == EINTR) 2309 ; 2310 assert(ret == 0, "sema_wait() failed"); 2311 2312 // were we externally suspended while we were waiting? 2313 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2314 if (threadIsSuspended) { 2315 // The semaphore has been incremented, but while we were waiting 2316 // another thread suspended us. We don't want to continue running 2317 // while suspended because that would surprise the thread that 2318 // suspended us. 2319 ret = ::sema_post(&sig_sem); 2320 assert(ret == 0, "sema_post() failed"); 2321 2322 thread->java_suspend_self(); 2323 } 2324 } while (threadIsSuspended); 2325 } 2326} 2327 2328int os::signal_lookup() { 2329 return check_pending_signals(false); 2330} 2331 2332int os::signal_wait() { 2333 return check_pending_signals(true); 2334} 2335 2336//////////////////////////////////////////////////////////////////////////////// 2337// Virtual Memory 2338 2339static int page_size = -1; 2340 2341// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2342// clear this var if support is not available. 2343static bool has_map_align = true; 2344 2345int os::vm_page_size() { 2346 assert(page_size != -1, "must call os::init"); 2347 return page_size; 2348} 2349 2350// Solaris allocates memory by pages. 2351int os::vm_allocation_granularity() { 2352 assert(page_size != -1, "must call os::init"); 2353 return page_size; 2354} 2355 2356static bool recoverable_mmap_error(int err) { 2357 // See if the error is one we can let the caller handle. This 2358 // list of errno values comes from the Solaris mmap(2) man page. 2359 switch (err) { 2360 case EBADF: 2361 case EINVAL: 2362 case ENOTSUP: 2363 // let the caller deal with these errors 2364 return true; 2365 2366 default: 2367 // Any remaining errors on this OS can cause our reserved mapping 2368 // to be lost. That can cause confusion where different data 2369 // structures think they have the same memory mapped. The worst 2370 // scenario is if both the VM and a library think they have the 2371 // same memory mapped. 2372 return false; 2373 } 2374} 2375 2376static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2377 int err) { 2378 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2379 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2380 os::strerror(err), err); 2381} 2382 2383static void warn_fail_commit_memory(char* addr, size_t bytes, 2384 size_t alignment_hint, bool exec, 2385 int err) { 2386 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2387 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2388 alignment_hint, exec, os::strerror(err), err); 2389} 2390 2391int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2392 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2393 size_t size = bytes; 2394 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2395 if (res != NULL) { 2396 if (UseNUMAInterleaving) { 2397 numa_make_global(addr, bytes); 2398 } 2399 return 0; 2400 } 2401 2402 int err = errno; // save errno from mmap() call in mmap_chunk() 2403 2404 if (!recoverable_mmap_error(err)) { 2405 warn_fail_commit_memory(addr, bytes, exec, err); 2406 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2407 } 2408 2409 return err; 2410} 2411 2412bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2413 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2414} 2415 2416void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2417 const char* mesg) { 2418 assert(mesg != NULL, "mesg must be specified"); 2419 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2420 if (err != 0) { 2421 // the caller wants all commit errors to exit with the specified mesg: 2422 warn_fail_commit_memory(addr, bytes, exec, err); 2423 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2424 } 2425} 2426 2427size_t os::Solaris::page_size_for_alignment(size_t alignment) { 2428 assert(is_size_aligned(alignment, (size_t) vm_page_size()), 2429 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, 2430 alignment, (size_t) vm_page_size()); 2431 2432 for (int i = 0; _page_sizes[i] != 0; i++) { 2433 if (is_size_aligned(alignment, _page_sizes[i])) { 2434 return _page_sizes[i]; 2435 } 2436 } 2437 2438 return (size_t) vm_page_size(); 2439} 2440 2441int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2442 size_t alignment_hint, bool exec) { 2443 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2444 if (err == 0 && UseLargePages && alignment_hint > 0) { 2445 assert(is_size_aligned(bytes, alignment_hint), 2446 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint); 2447 2448 // The syscall memcntl requires an exact page size (see man memcntl for details). 2449 size_t page_size = page_size_for_alignment(alignment_hint); 2450 if (page_size > (size_t) vm_page_size()) { 2451 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2452 } 2453 } 2454 return err; 2455} 2456 2457bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2458 bool exec) { 2459 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2460} 2461 2462void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2463 size_t alignment_hint, bool exec, 2464 const char* mesg) { 2465 assert(mesg != NULL, "mesg must be specified"); 2466 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2467 if (err != 0) { 2468 // the caller wants all commit errors to exit with the specified mesg: 2469 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2470 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2471 } 2472} 2473 2474// Uncommit the pages in a specified region. 2475void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2476 if (madvise(addr, bytes, MADV_FREE) < 0) { 2477 debug_only(warning("MADV_FREE failed.")); 2478 return; 2479 } 2480} 2481 2482bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2483 return os::commit_memory(addr, size, !ExecMem); 2484} 2485 2486bool os::remove_stack_guard_pages(char* addr, size_t size) { 2487 return os::uncommit_memory(addr, size); 2488} 2489 2490// Change the page size in a given range. 2491void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2492 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2493 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2494 if (UseLargePages) { 2495 size_t page_size = Solaris::page_size_for_alignment(alignment_hint); 2496 if (page_size > (size_t) vm_page_size()) { 2497 Solaris::setup_large_pages(addr, bytes, page_size); 2498 } 2499 } 2500} 2501 2502// Tell the OS to make the range local to the first-touching LWP 2503void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2504 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2505 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2506 debug_only(warning("MADV_ACCESS_LWP failed.")); 2507 } 2508} 2509 2510// Tell the OS that this range would be accessed from different LWPs. 2511void os::numa_make_global(char *addr, size_t bytes) { 2512 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2513 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2514 debug_only(warning("MADV_ACCESS_MANY failed.")); 2515 } 2516} 2517 2518// Get the number of the locality groups. 2519size_t os::numa_get_groups_num() { 2520 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2521 return n != -1 ? n : 1; 2522} 2523 2524// Get a list of leaf locality groups. A leaf lgroup is group that 2525// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2526// board. An LWP is assigned to one of these groups upon creation. 2527size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2528 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2529 ids[0] = 0; 2530 return 1; 2531 } 2532 int result_size = 0, top = 1, bottom = 0, cur = 0; 2533 for (int k = 0; k < size; k++) { 2534 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2535 (Solaris::lgrp_id_t*)&ids[top], size - top); 2536 if (r == -1) { 2537 ids[0] = 0; 2538 return 1; 2539 } 2540 if (!r) { 2541 // That's a leaf node. 2542 assert(bottom <= cur, "Sanity check"); 2543 // Check if the node has memory 2544 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2545 NULL, 0, LGRP_RSRC_MEM) > 0) { 2546 ids[bottom++] = ids[cur]; 2547 } 2548 } 2549 top += r; 2550 cur++; 2551 } 2552 if (bottom == 0) { 2553 // Handle a situation, when the OS reports no memory available. 2554 // Assume UMA architecture. 2555 ids[0] = 0; 2556 return 1; 2557 } 2558 return bottom; 2559} 2560 2561// Detect the topology change. Typically happens during CPU plugging-unplugging. 2562bool os::numa_topology_changed() { 2563 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2564 if (is_stale != -1 && is_stale) { 2565 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2566 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2567 assert(c != 0, "Failure to initialize LGRP API"); 2568 Solaris::set_lgrp_cookie(c); 2569 return true; 2570 } 2571 return false; 2572} 2573 2574// Get the group id of the current LWP. 2575int os::numa_get_group_id() { 2576 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2577 if (lgrp_id == -1) { 2578 return 0; 2579 } 2580 const int size = os::numa_get_groups_num(); 2581 int *ids = (int*)alloca(size * sizeof(int)); 2582 2583 // Get the ids of all lgroups with memory; r is the count. 2584 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2585 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2586 if (r <= 0) { 2587 return 0; 2588 } 2589 return ids[os::random() % r]; 2590} 2591 2592// Request information about the page. 2593bool os::get_page_info(char *start, page_info* info) { 2594 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2595 uint64_t addr = (uintptr_t)start; 2596 uint64_t outdata[2]; 2597 uint_t validity = 0; 2598 2599 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2600 return false; 2601 } 2602 2603 info->size = 0; 2604 info->lgrp_id = -1; 2605 2606 if ((validity & 1) != 0) { 2607 if ((validity & 2) != 0) { 2608 info->lgrp_id = outdata[0]; 2609 } 2610 if ((validity & 4) != 0) { 2611 info->size = outdata[1]; 2612 } 2613 return true; 2614 } 2615 return false; 2616} 2617 2618// Scan the pages from start to end until a page different than 2619// the one described in the info parameter is encountered. 2620char *os::scan_pages(char *start, char* end, page_info* page_expected, 2621 page_info* page_found) { 2622 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2623 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2624 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1]; 2625 uint_t validity[MAX_MEMINFO_CNT]; 2626 2627 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2628 uint64_t p = (uint64_t)start; 2629 while (p < (uint64_t)end) { 2630 addrs[0] = p; 2631 size_t addrs_count = 1; 2632 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2633 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2634 addrs_count++; 2635 } 2636 2637 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2638 return NULL; 2639 } 2640 2641 size_t i = 0; 2642 for (; i < addrs_count; i++) { 2643 if ((validity[i] & 1) != 0) { 2644 if ((validity[i] & 4) != 0) { 2645 if (outdata[types * i + 1] != page_expected->size) { 2646 break; 2647 } 2648 } else if (page_expected->size != 0) { 2649 break; 2650 } 2651 2652 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2653 if (outdata[types * i] != page_expected->lgrp_id) { 2654 break; 2655 } 2656 } 2657 } else { 2658 return NULL; 2659 } 2660 } 2661 2662 if (i < addrs_count) { 2663 if ((validity[i] & 2) != 0) { 2664 page_found->lgrp_id = outdata[types * i]; 2665 } else { 2666 page_found->lgrp_id = -1; 2667 } 2668 if ((validity[i] & 4) != 0) { 2669 page_found->size = outdata[types * i + 1]; 2670 } else { 2671 page_found->size = 0; 2672 } 2673 return (char*)addrs[i]; 2674 } 2675 2676 p = addrs[addrs_count - 1] + page_size; 2677 } 2678 return end; 2679} 2680 2681bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2682 size_t size = bytes; 2683 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2684 // uncommitted page. Otherwise, the read/write might succeed if we 2685 // have enough swap space to back the physical page. 2686 return 2687 NULL != Solaris::mmap_chunk(addr, size, 2688 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2689 PROT_NONE); 2690} 2691 2692char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2693 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2694 2695 if (b == MAP_FAILED) { 2696 return NULL; 2697 } 2698 return b; 2699} 2700 2701char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, 2702 size_t alignment_hint, bool fixed) { 2703 char* addr = requested_addr; 2704 int flags = MAP_PRIVATE | MAP_NORESERVE; 2705 2706 assert(!(fixed && (alignment_hint > 0)), 2707 "alignment hint meaningless with fixed mmap"); 2708 2709 if (fixed) { 2710 flags |= MAP_FIXED; 2711 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2712 flags |= MAP_ALIGN; 2713 addr = (char*) alignment_hint; 2714 } 2715 2716 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2717 // uncommitted page. Otherwise, the read/write might succeed if we 2718 // have enough swap space to back the physical page. 2719 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2720} 2721 2722char* os::pd_reserve_memory(size_t bytes, char* requested_addr, 2723 size_t alignment_hint) { 2724 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, 2725 (requested_addr != NULL)); 2726 2727 guarantee(requested_addr == NULL || requested_addr == addr, 2728 "OS failed to return requested mmap address."); 2729 return addr; 2730} 2731 2732// Reserve memory at an arbitrary address, only if that area is 2733// available (and not reserved for something else). 2734 2735char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2736 const int max_tries = 10; 2737 char* base[max_tries]; 2738 size_t size[max_tries]; 2739 2740 // Solaris adds a gap between mmap'ed regions. The size of the gap 2741 // is dependent on the requested size and the MMU. Our initial gap 2742 // value here is just a guess and will be corrected later. 2743 bool had_top_overlap = false; 2744 bool have_adjusted_gap = false; 2745 size_t gap = 0x400000; 2746 2747 // Assert only that the size is a multiple of the page size, since 2748 // that's all that mmap requires, and since that's all we really know 2749 // about at this low abstraction level. If we need higher alignment, 2750 // we can either pass an alignment to this method or verify alignment 2751 // in one of the methods further up the call chain. See bug 5044738. 2752 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2753 2754 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2755 // Give it a try, if the kernel honors the hint we can return immediately. 2756 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2757 2758 volatile int err = errno; 2759 if (addr == requested_addr) { 2760 return addr; 2761 } else if (addr != NULL) { 2762 pd_unmap_memory(addr, bytes); 2763 } 2764 2765 if (log_is_enabled(Warning, os)) { 2766 char buf[256]; 2767 buf[0] = '\0'; 2768 if (addr == NULL) { 2769 jio_snprintf(buf, sizeof(buf), ": %s", os::strerror(err)); 2770 } 2771 log_info(os)("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 2772 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2773 "%s", bytes, requested_addr, addr, buf); 2774 } 2775 2776 // Address hint method didn't work. Fall back to the old method. 2777 // In theory, once SNV becomes our oldest supported platform, this 2778 // code will no longer be needed. 2779 // 2780 // Repeatedly allocate blocks until the block is allocated at the 2781 // right spot. Give up after max_tries. 2782 int i; 2783 for (i = 0; i < max_tries; ++i) { 2784 base[i] = reserve_memory(bytes); 2785 2786 if (base[i] != NULL) { 2787 // Is this the block we wanted? 2788 if (base[i] == requested_addr) { 2789 size[i] = bytes; 2790 break; 2791 } 2792 2793 // check that the gap value is right 2794 if (had_top_overlap && !have_adjusted_gap) { 2795 size_t actual_gap = base[i-1] - base[i] - bytes; 2796 if (gap != actual_gap) { 2797 // adjust the gap value and retry the last 2 allocations 2798 assert(i > 0, "gap adjustment code problem"); 2799 have_adjusted_gap = true; // adjust the gap only once, just in case 2800 gap = actual_gap; 2801 log_info(os)("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2802 unmap_memory(base[i], bytes); 2803 unmap_memory(base[i-1], size[i-1]); 2804 i-=2; 2805 continue; 2806 } 2807 } 2808 2809 // Does this overlap the block we wanted? Give back the overlapped 2810 // parts and try again. 2811 // 2812 // There is still a bug in this code: if top_overlap == bytes, 2813 // the overlap is offset from requested region by the value of gap. 2814 // In this case giving back the overlapped part will not work, 2815 // because we'll give back the entire block at base[i] and 2816 // therefore the subsequent allocation will not generate a new gap. 2817 // This could be fixed with a new algorithm that used larger 2818 // or variable size chunks to find the requested region - 2819 // but such a change would introduce additional complications. 2820 // It's rare enough that the planets align for this bug, 2821 // so we'll just wait for a fix for 6204603/5003415 which 2822 // will provide a mmap flag to allow us to avoid this business. 2823 2824 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2825 if (top_overlap >= 0 && top_overlap < bytes) { 2826 had_top_overlap = true; 2827 unmap_memory(base[i], top_overlap); 2828 base[i] += top_overlap; 2829 size[i] = bytes - top_overlap; 2830 } else { 2831 size_t bottom_overlap = base[i] + bytes - requested_addr; 2832 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2833 if (bottom_overlap == 0) { 2834 log_info(os)("attempt_reserve_memory_at: possible alignment bug"); 2835 } 2836 unmap_memory(requested_addr, bottom_overlap); 2837 size[i] = bytes - bottom_overlap; 2838 } else { 2839 size[i] = bytes; 2840 } 2841 } 2842 } 2843 } 2844 2845 // Give back the unused reserved pieces. 2846 2847 for (int j = 0; j < i; ++j) { 2848 if (base[j] != NULL) { 2849 unmap_memory(base[j], size[j]); 2850 } 2851 } 2852 2853 return (i < max_tries) ? requested_addr : NULL; 2854} 2855 2856bool os::pd_release_memory(char* addr, size_t bytes) { 2857 size_t size = bytes; 2858 return munmap(addr, size) == 0; 2859} 2860 2861static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2862 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2863 "addr must be page aligned"); 2864 int retVal = mprotect(addr, bytes, prot); 2865 return retVal == 0; 2866} 2867 2868// Protect memory (Used to pass readonly pages through 2869// JNI GetArray<type>Elements with empty arrays.) 2870// Also, used for serialization page and for compressed oops null pointer 2871// checking. 2872bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2873 bool is_committed) { 2874 unsigned int p = 0; 2875 switch (prot) { 2876 case MEM_PROT_NONE: p = PROT_NONE; break; 2877 case MEM_PROT_READ: p = PROT_READ; break; 2878 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2879 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2880 default: 2881 ShouldNotReachHere(); 2882 } 2883 // is_committed is unused. 2884 return solaris_mprotect(addr, bytes, p); 2885} 2886 2887// guard_memory and unguard_memory only happens within stack guard pages. 2888// Since ISM pertains only to the heap, guard and unguard memory should not 2889/// happen with an ISM region. 2890bool os::guard_memory(char* addr, size_t bytes) { 2891 return solaris_mprotect(addr, bytes, PROT_NONE); 2892} 2893 2894bool os::unguard_memory(char* addr, size_t bytes) { 2895 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 2896} 2897 2898// Large page support 2899static size_t _large_page_size = 0; 2900 2901// Insertion sort for small arrays (descending order). 2902static void insertion_sort_descending(size_t* array, int len) { 2903 for (int i = 0; i < len; i++) { 2904 size_t val = array[i]; 2905 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 2906 size_t tmp = array[key]; 2907 array[key] = array[key - 1]; 2908 array[key - 1] = tmp; 2909 } 2910 } 2911} 2912 2913bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 2914 const unsigned int usable_count = VM_Version::page_size_count(); 2915 if (usable_count == 1) { 2916 return false; 2917 } 2918 2919 // Find the right getpagesizes interface. When solaris 11 is the minimum 2920 // build platform, getpagesizes() (without the '2') can be called directly. 2921 typedef int (*gps_t)(size_t[], int); 2922 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 2923 if (gps_func == NULL) { 2924 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 2925 if (gps_func == NULL) { 2926 if (warn) { 2927 warning("MPSS is not supported by the operating system."); 2928 } 2929 return false; 2930 } 2931 } 2932 2933 // Fill the array of page sizes. 2934 int n = (*gps_func)(_page_sizes, page_sizes_max); 2935 assert(n > 0, "Solaris bug?"); 2936 2937 if (n == page_sizes_max) { 2938 // Add a sentinel value (necessary only if the array was completely filled 2939 // since it is static (zeroed at initialization)). 2940 _page_sizes[--n] = 0; 2941 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 2942 } 2943 assert(_page_sizes[n] == 0, "missing sentinel"); 2944 trace_page_sizes("available page sizes", _page_sizes, n); 2945 2946 if (n == 1) return false; // Only one page size available. 2947 2948 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 2949 // select up to usable_count elements. First sort the array, find the first 2950 // acceptable value, then copy the usable sizes to the top of the array and 2951 // trim the rest. Make sure to include the default page size :-). 2952 // 2953 // A better policy could get rid of the 4M limit by taking the sizes of the 2954 // important VM memory regions (java heap and possibly the code cache) into 2955 // account. 2956 insertion_sort_descending(_page_sizes, n); 2957 const size_t size_limit = 2958 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 2959 int beg; 2960 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */; 2961 const int end = MIN2((int)usable_count, n) - 1; 2962 for (int cur = 0; cur < end; ++cur, ++beg) { 2963 _page_sizes[cur] = _page_sizes[beg]; 2964 } 2965 _page_sizes[end] = vm_page_size(); 2966 _page_sizes[end + 1] = 0; 2967 2968 if (_page_sizes[end] > _page_sizes[end - 1]) { 2969 // Default page size is not the smallest; sort again. 2970 insertion_sort_descending(_page_sizes, end + 1); 2971 } 2972 *page_size = _page_sizes[0]; 2973 2974 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 2975 return true; 2976} 2977 2978void os::large_page_init() { 2979 if (UseLargePages) { 2980 // print a warning if any large page related flag is specified on command line 2981 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 2982 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 2983 2984 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 2985 } 2986} 2987 2988bool os::Solaris::is_valid_page_size(size_t bytes) { 2989 for (int i = 0; _page_sizes[i] != 0; i++) { 2990 if (_page_sizes[i] == bytes) { 2991 return true; 2992 } 2993 } 2994 return false; 2995} 2996 2997bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 2998 assert(is_valid_page_size(align), SIZE_FORMAT " is not a valid page size", align); 2999 assert(is_ptr_aligned((void*) start, align), 3000 PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align); 3001 assert(is_size_aligned(bytes, align), 3002 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align); 3003 3004 // Signal to OS that we want large pages for addresses 3005 // from addr, addr + bytes 3006 struct memcntl_mha mpss_struct; 3007 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3008 mpss_struct.mha_pagesize = align; 3009 mpss_struct.mha_flags = 0; 3010 // Upon successful completion, memcntl() returns 0 3011 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 3012 debug_only(warning("Attempt to use MPSS failed.")); 3013 return false; 3014 } 3015 return true; 3016} 3017 3018char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 3019 fatal("os::reserve_memory_special should not be called on Solaris."); 3020 return NULL; 3021} 3022 3023bool os::release_memory_special(char* base, size_t bytes) { 3024 fatal("os::release_memory_special should not be called on Solaris."); 3025 return false; 3026} 3027 3028size_t os::large_page_size() { 3029 return _large_page_size; 3030} 3031 3032// MPSS allows application to commit large page memory on demand; with ISM 3033// the entire memory region must be allocated as shared memory. 3034bool os::can_commit_large_page_memory() { 3035 return true; 3036} 3037 3038bool os::can_execute_large_page_memory() { 3039 return true; 3040} 3041 3042// Read calls from inside the vm need to perform state transitions 3043size_t os::read(int fd, void *buf, unsigned int nBytes) { 3044 size_t res; 3045 JavaThread* thread = (JavaThread*)Thread::current(); 3046 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3047 ThreadBlockInVM tbiv(thread); 3048 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3049 return res; 3050} 3051 3052size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) { 3053 size_t res; 3054 JavaThread* thread = (JavaThread*)Thread::current(); 3055 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3056 ThreadBlockInVM tbiv(thread); 3057 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res); 3058 return res; 3059} 3060 3061size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3062 size_t res; 3063 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 3064 "Assumed _thread_in_native"); 3065 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3066 return res; 3067} 3068 3069void os::naked_short_sleep(jlong ms) { 3070 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 3071 3072 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 3073 // Solaris requires -lrt for this. 3074 usleep((ms * 1000)); 3075 3076 return; 3077} 3078 3079// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3080void os::infinite_sleep() { 3081 while (true) { // sleep forever ... 3082 ::sleep(100); // ... 100 seconds at a time 3083 } 3084} 3085 3086// Used to convert frequent JVM_Yield() to nops 3087bool os::dont_yield() { 3088 if (DontYieldALot) { 3089 static hrtime_t last_time = 0; 3090 hrtime_t diff = getTimeNanos() - last_time; 3091 3092 if (diff < DontYieldALotInterval * 1000000) { 3093 return true; 3094 } 3095 3096 last_time += diff; 3097 3098 return false; 3099 } else { 3100 return false; 3101 } 3102} 3103 3104// Note that yield semantics are defined by the scheduling class to which 3105// the thread currently belongs. Typically, yield will _not yield to 3106// other equal or higher priority threads that reside on the dispatch queues 3107// of other CPUs. 3108 3109void os::naked_yield() { 3110 thr_yield(); 3111} 3112 3113// Interface for setting lwp priorities. If we are using T2 libthread, 3114// which forces the use of BoundThreads or we manually set UseBoundThreads, 3115// all of our threads will be assigned to real lwp's. Using the thr_setprio 3116// function is meaningless in this mode so we must adjust the real lwp's priority 3117// The routines below implement the getting and setting of lwp priorities. 3118// 3119// Note: T2 is now the only supported libthread. UseBoundThreads flag is 3120// being deprecated and all threads are now BoundThreads 3121// 3122// Note: There are three priority scales used on Solaris. Java priotities 3123// which range from 1 to 10, libthread "thr_setprio" scale which range 3124// from 0 to 127, and the current scheduling class of the process we 3125// are running in. This is typically from -60 to +60. 3126// The setting of the lwp priorities in done after a call to thr_setprio 3127// so Java priorities are mapped to libthread priorities and we map from 3128// the latter to lwp priorities. We don't keep priorities stored in 3129// Java priorities since some of our worker threads want to set priorities 3130// higher than all Java threads. 3131// 3132// For related information: 3133// (1) man -s 2 priocntl 3134// (2) man -s 4 priocntl 3135// (3) man dispadmin 3136// = librt.so 3137// = libthread/common/rtsched.c - thrp_setlwpprio(). 3138// = ps -cL <pid> ... to validate priority. 3139// = sched_get_priority_min and _max 3140// pthread_create 3141// sched_setparam 3142// pthread_setschedparam 3143// 3144// Assumptions: 3145// + We assume that all threads in the process belong to the same 3146// scheduling class. IE. an homogenous process. 3147// + Must be root or in IA group to change change "interactive" attribute. 3148// Priocntl() will fail silently. The only indication of failure is when 3149// we read-back the value and notice that it hasn't changed. 3150// + Interactive threads enter the runq at the head, non-interactive at the tail. 3151// + For RT, change timeslice as well. Invariant: 3152// constant "priority integral" 3153// Konst == TimeSlice * (60-Priority) 3154// Given a priority, compute appropriate timeslice. 3155// + Higher numerical values have higher priority. 3156 3157// sched class attributes 3158typedef struct { 3159 int schedPolicy; // classID 3160 int maxPrio; 3161 int minPrio; 3162} SchedInfo; 3163 3164 3165static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3166 3167#ifdef ASSERT 3168static int ReadBackValidate = 1; 3169#endif 3170static int myClass = 0; 3171static int myMin = 0; 3172static int myMax = 0; 3173static int myCur = 0; 3174static bool priocntl_enable = false; 3175 3176static const int criticalPrio = FXCriticalPriority; 3177static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3178 3179 3180// lwp_priocntl_init 3181// 3182// Try to determine the priority scale for our process. 3183// 3184// Return errno or 0 if OK. 3185// 3186static int lwp_priocntl_init() { 3187 int rslt; 3188 pcinfo_t ClassInfo; 3189 pcparms_t ParmInfo; 3190 int i; 3191 3192 if (!UseThreadPriorities) return 0; 3193 3194 // If ThreadPriorityPolicy is 1, switch tables 3195 if (ThreadPriorityPolicy == 1) { 3196 for (i = 0; i < CriticalPriority+1; i++) 3197 os::java_to_os_priority[i] = prio_policy1[i]; 3198 } 3199 if (UseCriticalJavaThreadPriority) { 3200 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3201 // See set_native_priority() and set_lwp_class_and_priority(). 3202 // Save original MaxPriority mapping in case attempt to 3203 // use critical priority fails. 3204 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3205 // Set negative to distinguish from other priorities 3206 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3207 } 3208 3209 // Get IDs for a set of well-known scheduling classes. 3210 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3211 // the system. We should have a loop that iterates over the 3212 // classID values, which are known to be "small" integers. 3213 3214 strcpy(ClassInfo.pc_clname, "TS"); 3215 ClassInfo.pc_cid = -1; 3216 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3217 if (rslt < 0) return errno; 3218 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3219 tsLimits.schedPolicy = ClassInfo.pc_cid; 3220 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3221 tsLimits.minPrio = -tsLimits.maxPrio; 3222 3223 strcpy(ClassInfo.pc_clname, "IA"); 3224 ClassInfo.pc_cid = -1; 3225 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3226 if (rslt < 0) return errno; 3227 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3228 iaLimits.schedPolicy = ClassInfo.pc_cid; 3229 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3230 iaLimits.minPrio = -iaLimits.maxPrio; 3231 3232 strcpy(ClassInfo.pc_clname, "RT"); 3233 ClassInfo.pc_cid = -1; 3234 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3235 if (rslt < 0) return errno; 3236 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3237 rtLimits.schedPolicy = ClassInfo.pc_cid; 3238 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3239 rtLimits.minPrio = 0; 3240 3241 strcpy(ClassInfo.pc_clname, "FX"); 3242 ClassInfo.pc_cid = -1; 3243 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3244 if (rslt < 0) return errno; 3245 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3246 fxLimits.schedPolicy = ClassInfo.pc_cid; 3247 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3248 fxLimits.minPrio = 0; 3249 3250 // Query our "current" scheduling class. 3251 // This will normally be IA, TS or, rarely, FX or RT. 3252 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3253 ParmInfo.pc_cid = PC_CLNULL; 3254 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3255 if (rslt < 0) return errno; 3256 myClass = ParmInfo.pc_cid; 3257 3258 // We now know our scheduling classId, get specific information 3259 // about the class. 3260 ClassInfo.pc_cid = myClass; 3261 ClassInfo.pc_clname[0] = 0; 3262 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3263 if (rslt < 0) return errno; 3264 3265 if (ThreadPriorityVerbose) { 3266 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3267 } 3268 3269 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3270 ParmInfo.pc_cid = PC_CLNULL; 3271 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3272 if (rslt < 0) return errno; 3273 3274 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3275 myMin = rtLimits.minPrio; 3276 myMax = rtLimits.maxPrio; 3277 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3278 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3279 myMin = iaLimits.minPrio; 3280 myMax = iaLimits.maxPrio; 3281 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3282 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3283 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3284 myMin = tsLimits.minPrio; 3285 myMax = tsLimits.maxPrio; 3286 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3287 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3288 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3289 myMin = fxLimits.minPrio; 3290 myMax = fxLimits.maxPrio; 3291 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3292 } else { 3293 // No clue - punt 3294 if (ThreadPriorityVerbose) { 3295 tty->print_cr("Unknown scheduling class: %s ... \n", 3296 ClassInfo.pc_clname); 3297 } 3298 return EINVAL; // no clue, punt 3299 } 3300 3301 if (ThreadPriorityVerbose) { 3302 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax); 3303 } 3304 3305 priocntl_enable = true; // Enable changing priorities 3306 return 0; 3307} 3308 3309#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3310#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3311#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3312#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3313 3314 3315// scale_to_lwp_priority 3316// 3317// Convert from the libthread "thr_setprio" scale to our current 3318// lwp scheduling class scale. 3319// 3320static int scale_to_lwp_priority(int rMin, int rMax, int x) { 3321 int v; 3322 3323 if (x == 127) return rMax; // avoid round-down 3324 v = (((x*(rMax-rMin)))/128)+rMin; 3325 return v; 3326} 3327 3328 3329// set_lwp_class_and_priority 3330int set_lwp_class_and_priority(int ThreadID, int lwpid, 3331 int newPrio, int new_class, bool scale) { 3332 int rslt; 3333 int Actual, Expected, prv; 3334 pcparms_t ParmInfo; // for GET-SET 3335#ifdef ASSERT 3336 pcparms_t ReadBack; // for readback 3337#endif 3338 3339 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3340 // Query current values. 3341 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3342 // Cache "pcparms_t" in global ParmCache. 3343 // TODO: elide set-to-same-value 3344 3345 // If something went wrong on init, don't change priorities. 3346 if (!priocntl_enable) { 3347 if (ThreadPriorityVerbose) { 3348 tty->print_cr("Trying to set priority but init failed, ignoring"); 3349 } 3350 return EINVAL; 3351 } 3352 3353 // If lwp hasn't started yet, just return 3354 // the _start routine will call us again. 3355 if (lwpid <= 0) { 3356 if (ThreadPriorityVerbose) { 3357 tty->print_cr("deferring the set_lwp_class_and_priority of thread " 3358 INTPTR_FORMAT " to %d, lwpid not set", 3359 ThreadID, newPrio); 3360 } 3361 return 0; 3362 } 3363 3364 if (ThreadPriorityVerbose) { 3365 tty->print_cr ("set_lwp_class_and_priority(" 3366 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3367 ThreadID, lwpid, newPrio); 3368 } 3369 3370 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3371 ParmInfo.pc_cid = PC_CLNULL; 3372 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3373 if (rslt < 0) return errno; 3374 3375 int cur_class = ParmInfo.pc_cid; 3376 ParmInfo.pc_cid = (id_t)new_class; 3377 3378 if (new_class == rtLimits.schedPolicy) { 3379 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3380 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3381 rtLimits.maxPrio, newPrio) 3382 : newPrio; 3383 rtInfo->rt_tqsecs = RT_NOCHANGE; 3384 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3385 if (ThreadPriorityVerbose) { 3386 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3387 } 3388 } else if (new_class == iaLimits.schedPolicy) { 3389 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3390 int maxClamped = MIN2(iaLimits.maxPrio, 3391 cur_class == new_class 3392 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3393 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3394 maxClamped, newPrio) 3395 : newPrio; 3396 iaInfo->ia_uprilim = cur_class == new_class 3397 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3398 iaInfo->ia_mode = IA_NOCHANGE; 3399 if (ThreadPriorityVerbose) { 3400 tty->print_cr("IA: [%d...%d] %d->%d\n", 3401 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3402 } 3403 } else if (new_class == tsLimits.schedPolicy) { 3404 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3405 int maxClamped = MIN2(tsLimits.maxPrio, 3406 cur_class == new_class 3407 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3408 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3409 maxClamped, newPrio) 3410 : newPrio; 3411 tsInfo->ts_uprilim = cur_class == new_class 3412 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3413 if (ThreadPriorityVerbose) { 3414 tty->print_cr("TS: [%d...%d] %d->%d\n", 3415 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3416 } 3417 } else if (new_class == fxLimits.schedPolicy) { 3418 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3419 int maxClamped = MIN2(fxLimits.maxPrio, 3420 cur_class == new_class 3421 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3422 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3423 maxClamped, newPrio) 3424 : newPrio; 3425 fxInfo->fx_uprilim = cur_class == new_class 3426 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3427 fxInfo->fx_tqsecs = FX_NOCHANGE; 3428 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3429 if (ThreadPriorityVerbose) { 3430 tty->print_cr("FX: [%d...%d] %d->%d\n", 3431 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3432 } 3433 } else { 3434 if (ThreadPriorityVerbose) { 3435 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3436 } 3437 return EINVAL; // no clue, punt 3438 } 3439 3440 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3441 if (ThreadPriorityVerbose && rslt) { 3442 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3443 } 3444 if (rslt < 0) return errno; 3445 3446#ifdef ASSERT 3447 // Sanity check: read back what we just attempted to set. 3448 // In theory it could have changed in the interim ... 3449 // 3450 // The priocntl system call is tricky. 3451 // Sometimes it'll validate the priority value argument and 3452 // return EINVAL if unhappy. At other times it fails silently. 3453 // Readbacks are prudent. 3454 3455 if (!ReadBackValidate) return 0; 3456 3457 memset(&ReadBack, 0, sizeof(pcparms_t)); 3458 ReadBack.pc_cid = PC_CLNULL; 3459 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3460 assert(rslt >= 0, "priocntl failed"); 3461 Actual = Expected = 0xBAD; 3462 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3463 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3464 Actual = RTPRI(ReadBack)->rt_pri; 3465 Expected = RTPRI(ParmInfo)->rt_pri; 3466 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3467 Actual = IAPRI(ReadBack)->ia_upri; 3468 Expected = IAPRI(ParmInfo)->ia_upri; 3469 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3470 Actual = TSPRI(ReadBack)->ts_upri; 3471 Expected = TSPRI(ParmInfo)->ts_upri; 3472 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3473 Actual = FXPRI(ReadBack)->fx_upri; 3474 Expected = FXPRI(ParmInfo)->fx_upri; 3475 } else { 3476 if (ThreadPriorityVerbose) { 3477 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 3478 ParmInfo.pc_cid); 3479 } 3480 } 3481 3482 if (Actual != Expected) { 3483 if (ThreadPriorityVerbose) { 3484 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3485 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3486 } 3487 } 3488#endif 3489 3490 return 0; 3491} 3492 3493// Solaris only gives access to 128 real priorities at a time, 3494// so we expand Java's ten to fill this range. This would be better 3495// if we dynamically adjusted relative priorities. 3496// 3497// The ThreadPriorityPolicy option allows us to select 2 different 3498// priority scales. 3499// 3500// ThreadPriorityPolicy=0 3501// Since the Solaris' default priority is MaximumPriority, we do not 3502// set a priority lower than Max unless a priority lower than 3503// NormPriority is requested. 3504// 3505// ThreadPriorityPolicy=1 3506// This mode causes the priority table to get filled with 3507// linear values. NormPriority get's mapped to 50% of the 3508// Maximum priority an so on. This will cause VM threads 3509// to get unfair treatment against other Solaris processes 3510// which do not explicitly alter their thread priorities. 3511 3512int os::java_to_os_priority[CriticalPriority + 1] = { 3513 -99999, // 0 Entry should never be used 3514 3515 0, // 1 MinPriority 3516 32, // 2 3517 64, // 3 3518 3519 96, // 4 3520 127, // 5 NormPriority 3521 127, // 6 3522 3523 127, // 7 3524 127, // 8 3525 127, // 9 NearMaxPriority 3526 3527 127, // 10 MaxPriority 3528 3529 -criticalPrio // 11 CriticalPriority 3530}; 3531 3532OSReturn os::set_native_priority(Thread* thread, int newpri) { 3533 OSThread* osthread = thread->osthread(); 3534 3535 // Save requested priority in case the thread hasn't been started 3536 osthread->set_native_priority(newpri); 3537 3538 // Check for critical priority request 3539 bool fxcritical = false; 3540 if (newpri == -criticalPrio) { 3541 fxcritical = true; 3542 newpri = criticalPrio; 3543 } 3544 3545 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3546 if (!UseThreadPriorities) return OS_OK; 3547 3548 int status = 0; 3549 3550 if (!fxcritical) { 3551 // Use thr_setprio only if we have a priority that thr_setprio understands 3552 status = thr_setprio(thread->osthread()->thread_id(), newpri); 3553 } 3554 3555 int lwp_status = 3556 set_lwp_class_and_priority(osthread->thread_id(), 3557 osthread->lwp_id(), 3558 newpri, 3559 fxcritical ? fxLimits.schedPolicy : myClass, 3560 !fxcritical); 3561 if (lwp_status != 0 && fxcritical) { 3562 // Try again, this time without changing the scheduling class 3563 newpri = java_MaxPriority_to_os_priority; 3564 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 3565 osthread->lwp_id(), 3566 newpri, myClass, false); 3567 } 3568 status |= lwp_status; 3569 return (status == 0) ? OS_OK : OS_ERR; 3570} 3571 3572 3573OSReturn os::get_native_priority(const Thread* const thread, 3574 int *priority_ptr) { 3575 int p; 3576 if (!UseThreadPriorities) { 3577 *priority_ptr = NormalPriority; 3578 return OS_OK; 3579 } 3580 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3581 if (status != 0) { 3582 return OS_ERR; 3583 } 3584 *priority_ptr = p; 3585 return OS_OK; 3586} 3587 3588 3589// Hint to the underlying OS that a task switch would not be good. 3590// Void return because it's a hint and can fail. 3591void os::hint_no_preempt() { 3592 schedctl_start(schedctl_init()); 3593} 3594 3595static void resume_clear_context(OSThread *osthread) { 3596 osthread->set_ucontext(NULL); 3597} 3598 3599static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 3600 osthread->set_ucontext(context); 3601} 3602 3603static PosixSemaphore sr_semaphore; 3604 3605void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) { 3606 // Save and restore errno to avoid confusing native code with EINTR 3607 // after sigsuspend. 3608 int old_errno = errno; 3609 3610 OSThread* osthread = thread->osthread(); 3611 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 3612 3613 os::SuspendResume::State current = osthread->sr.state(); 3614 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 3615 suspend_save_context(osthread, uc); 3616 3617 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 3618 os::SuspendResume::State state = osthread->sr.suspended(); 3619 if (state == os::SuspendResume::SR_SUSPENDED) { 3620 sigset_t suspend_set; // signals for sigsuspend() 3621 3622 // get current set of blocked signals and unblock resume signal 3623 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); 3624 sigdelset(&suspend_set, os::Solaris::SIGasync()); 3625 3626 sr_semaphore.signal(); 3627 // wait here until we are resumed 3628 while (1) { 3629 sigsuspend(&suspend_set); 3630 3631 os::SuspendResume::State result = osthread->sr.running(); 3632 if (result == os::SuspendResume::SR_RUNNING) { 3633 sr_semaphore.signal(); 3634 break; 3635 } 3636 } 3637 3638 } else if (state == os::SuspendResume::SR_RUNNING) { 3639 // request was cancelled, continue 3640 } else { 3641 ShouldNotReachHere(); 3642 } 3643 3644 resume_clear_context(osthread); 3645 } else if (current == os::SuspendResume::SR_RUNNING) { 3646 // request was cancelled, continue 3647 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 3648 // ignore 3649 } else { 3650 // ignore 3651 } 3652 3653 errno = old_errno; 3654} 3655 3656void os::print_statistics() { 3657} 3658 3659bool os::message_box(const char* title, const char* message) { 3660 int i; 3661 fdStream err(defaultStream::error_fd()); 3662 for (i = 0; i < 78; i++) err.print_raw("="); 3663 err.cr(); 3664 err.print_raw_cr(title); 3665 for (i = 0; i < 78; i++) err.print_raw("-"); 3666 err.cr(); 3667 err.print_raw_cr(message); 3668 for (i = 0; i < 78; i++) err.print_raw("="); 3669 err.cr(); 3670 3671 char buf[16]; 3672 // Prevent process from exiting upon "read error" without consuming all CPU 3673 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3674 3675 return buf[0] == 'y' || buf[0] == 'Y'; 3676} 3677 3678static int sr_notify(OSThread* osthread) { 3679 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync()); 3680 assert_status(status == 0, status, "thr_kill"); 3681 return status; 3682} 3683 3684// "Randomly" selected value for how long we want to spin 3685// before bailing out on suspending a thread, also how often 3686// we send a signal to a thread we want to resume 3687static const int RANDOMLY_LARGE_INTEGER = 1000000; 3688static const int RANDOMLY_LARGE_INTEGER2 = 100; 3689 3690static bool do_suspend(OSThread* osthread) { 3691 assert(osthread->sr.is_running(), "thread should be running"); 3692 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 3693 3694 // mark as suspended and send signal 3695 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 3696 // failed to switch, state wasn't running? 3697 ShouldNotReachHere(); 3698 return false; 3699 } 3700 3701 if (sr_notify(osthread) != 0) { 3702 ShouldNotReachHere(); 3703 } 3704 3705 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 3706 while (true) { 3707 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) { 3708 break; 3709 } else { 3710 // timeout 3711 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 3712 if (cancelled == os::SuspendResume::SR_RUNNING) { 3713 return false; 3714 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 3715 // make sure that we consume the signal on the semaphore as well 3716 sr_semaphore.wait(); 3717 break; 3718 } else { 3719 ShouldNotReachHere(); 3720 return false; 3721 } 3722 } 3723 } 3724 3725 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 3726 return true; 3727} 3728 3729static void do_resume(OSThread* osthread) { 3730 assert(osthread->sr.is_suspended(), "thread should be suspended"); 3731 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 3732 3733 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 3734 // failed to switch to WAKEUP_REQUEST 3735 ShouldNotReachHere(); 3736 return; 3737 } 3738 3739 while (true) { 3740 if (sr_notify(osthread) == 0) { 3741 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { 3742 if (osthread->sr.is_running()) { 3743 return; 3744 } 3745 } 3746 } else { 3747 ShouldNotReachHere(); 3748 } 3749 } 3750 3751 guarantee(osthread->sr.is_running(), "Must be running!"); 3752} 3753 3754void os::SuspendedThreadTask::internal_do_task() { 3755 if (do_suspend(_thread->osthread())) { 3756 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 3757 do_task(context); 3758 do_resume(_thread->osthread()); 3759 } 3760} 3761 3762class PcFetcher : public os::SuspendedThreadTask { 3763 public: 3764 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} 3765 ExtendedPC result(); 3766 protected: 3767 void do_task(const os::SuspendedThreadTaskContext& context); 3768 private: 3769 ExtendedPC _epc; 3770}; 3771 3772ExtendedPC PcFetcher::result() { 3773 guarantee(is_done(), "task is not done yet."); 3774 return _epc; 3775} 3776 3777void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { 3778 Thread* thread = context.thread(); 3779 OSThread* osthread = thread->osthread(); 3780 if (osthread->ucontext() != NULL) { 3781 _epc = os::Solaris::ucontext_get_pc((const ucontext_t *) context.ucontext()); 3782 } else { 3783 // NULL context is unexpected, double-check this is the VMThread 3784 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); 3785 } 3786} 3787 3788// A lightweight implementation that does not suspend the target thread and 3789// thus returns only a hint. Used for profiling only! 3790ExtendedPC os::get_thread_pc(Thread* thread) { 3791 // Make sure that it is called by the watcher and the Threads lock is owned. 3792 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3793 // For now, is only used to profile the VM Thread 3794 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3795 PcFetcher fetcher(thread); 3796 fetcher.run(); 3797 return fetcher.result(); 3798} 3799 3800 3801// This does not do anything on Solaris. This is basically a hook for being 3802// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3803void os::os_exception_wrapper(java_call_t f, JavaValue* value, 3804 const methodHandle& method, JavaCallArguments* args, 3805 Thread* thread) { 3806 f(value, method, args, thread); 3807} 3808 3809// This routine may be used by user applications as a "hook" to catch signals. 3810// The user-defined signal handler must pass unrecognized signals to this 3811// routine, and if it returns true (non-zero), then the signal handler must 3812// return immediately. If the flag "abort_if_unrecognized" is true, then this 3813// routine will never retun false (zero), but instead will execute a VM panic 3814// routine kill the process. 3815// 3816// If this routine returns false, it is OK to call it again. This allows 3817// the user-defined signal handler to perform checks either before or after 3818// the VM performs its own checks. Naturally, the user code would be making 3819// a serious error if it tried to handle an exception (such as a null check 3820// or breakpoint) that the VM was generating for its own correct operation. 3821// 3822// This routine may recognize any of the following kinds of signals: 3823// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3824// os::Solaris::SIGasync 3825// It should be consulted by handlers for any of those signals. 3826// 3827// The caller of this routine must pass in the three arguments supplied 3828// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3829// field of the structure passed to sigaction(). This routine assumes that 3830// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3831// 3832// Note that the VM will print warnings if it detects conflicting signal 3833// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3834// 3835extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo, 3836 siginfo_t* siginfo, 3837 void* ucontext, 3838 int abort_if_unrecognized); 3839 3840 3841void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3842 int orig_errno = errno; // Preserve errno value over signal handler. 3843 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3844 errno = orig_errno; 3845} 3846 3847// This boolean allows users to forward their own non-matching signals 3848// to JVM_handle_solaris_signal, harmlessly. 3849bool os::Solaris::signal_handlers_are_installed = false; 3850 3851// For signal-chaining 3852bool os::Solaris::libjsig_is_loaded = false; 3853typedef struct sigaction *(*get_signal_t)(int); 3854get_signal_t os::Solaris::get_signal_action = NULL; 3855 3856struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3857 struct sigaction *actp = NULL; 3858 3859 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 3860 // Retrieve the old signal handler from libjsig 3861 actp = (*get_signal_action)(sig); 3862 } 3863 if (actp == NULL) { 3864 // Retrieve the preinstalled signal handler from jvm 3865 actp = get_preinstalled_handler(sig); 3866 } 3867 3868 return actp; 3869} 3870 3871static bool call_chained_handler(struct sigaction *actp, int sig, 3872 siginfo_t *siginfo, void *context) { 3873 // Call the old signal handler 3874 if (actp->sa_handler == SIG_DFL) { 3875 // It's more reasonable to let jvm treat it as an unexpected exception 3876 // instead of taking the default action. 3877 return false; 3878 } else if (actp->sa_handler != SIG_IGN) { 3879 if ((actp->sa_flags & SA_NODEFER) == 0) { 3880 // automaticlly block the signal 3881 sigaddset(&(actp->sa_mask), sig); 3882 } 3883 3884 sa_handler_t hand; 3885 sa_sigaction_t sa; 3886 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 3887 // retrieve the chained handler 3888 if (siginfo_flag_set) { 3889 sa = actp->sa_sigaction; 3890 } else { 3891 hand = actp->sa_handler; 3892 } 3893 3894 if ((actp->sa_flags & SA_RESETHAND) != 0) { 3895 actp->sa_handler = SIG_DFL; 3896 } 3897 3898 // try to honor the signal mask 3899 sigset_t oset; 3900 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); 3901 3902 // call into the chained handler 3903 if (siginfo_flag_set) { 3904 (*sa)(sig, siginfo, context); 3905 } else { 3906 (*hand)(sig); 3907 } 3908 3909 // restore the signal mask 3910 pthread_sigmask(SIG_SETMASK, &oset, 0); 3911 } 3912 // Tell jvm's signal handler the signal is taken care of. 3913 return true; 3914} 3915 3916bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 3917 bool chained = false; 3918 // signal-chaining 3919 if (UseSignalChaining) { 3920 struct sigaction *actp = get_chained_signal_action(sig); 3921 if (actp != NULL) { 3922 chained = call_chained_handler(actp, sig, siginfo, context); 3923 } 3924 } 3925 return chained; 3926} 3927 3928struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 3929 assert((chainedsigactions != (struct sigaction *)NULL) && 3930 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3931 if (preinstalled_sigs[sig] != 0) { 3932 return &chainedsigactions[sig]; 3933 } 3934 return NULL; 3935} 3936 3937void os::Solaris::save_preinstalled_handler(int sig, 3938 struct sigaction& oldAct) { 3939 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 3940 assert((chainedsigactions != (struct sigaction *)NULL) && 3941 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3942 chainedsigactions[sig] = oldAct; 3943 preinstalled_sigs[sig] = 1; 3944} 3945 3946void os::Solaris::set_signal_handler(int sig, bool set_installed, 3947 bool oktochain) { 3948 // Check for overwrite. 3949 struct sigaction oldAct; 3950 sigaction(sig, (struct sigaction*)NULL, &oldAct); 3951 void* oldhand = 3952 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3953 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3954 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 3955 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 3956 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 3957 if (AllowUserSignalHandlers || !set_installed) { 3958 // Do not overwrite; user takes responsibility to forward to us. 3959 return; 3960 } else if (UseSignalChaining) { 3961 if (oktochain) { 3962 // save the old handler in jvm 3963 save_preinstalled_handler(sig, oldAct); 3964 } else { 3965 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal."); 3966 } 3967 // libjsig also interposes the sigaction() call below and saves the 3968 // old sigaction on it own. 3969 } else { 3970 fatal("Encountered unexpected pre-existing sigaction handler " 3971 "%#lx for signal %d.", (long)oldhand, sig); 3972 } 3973 } 3974 3975 struct sigaction sigAct; 3976 sigfillset(&(sigAct.sa_mask)); 3977 sigAct.sa_handler = SIG_DFL; 3978 3979 sigAct.sa_sigaction = signalHandler; 3980 // Handle SIGSEGV on alternate signal stack if 3981 // not using stack banging 3982 if (!UseStackBanging && sig == SIGSEGV) { 3983 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 3984 } else { 3985 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 3986 } 3987 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 3988 3989 sigaction(sig, &sigAct, &oldAct); 3990 3991 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3992 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3993 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 3994} 3995 3996 3997#define DO_SIGNAL_CHECK(sig) \ 3998 do { \ 3999 if (!sigismember(&check_signal_done, sig)) { \ 4000 os::Solaris::check_signal_handler(sig); \ 4001 } \ 4002 } while (0) 4003 4004// This method is a periodic task to check for misbehaving JNI applications 4005// under CheckJNI, we can add any periodic checks here 4006 4007void os::run_periodic_checks() { 4008 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4009 // thereby preventing a NULL checks. 4010 if (!check_addr0_done) check_addr0_done = check_addr0(tty); 4011 4012 if (check_signals == false) return; 4013 4014 // SEGV and BUS if overridden could potentially prevent 4015 // generation of hs*.log in the event of a crash, debugging 4016 // such a case can be very challenging, so we absolutely 4017 // check for the following for a good measure: 4018 DO_SIGNAL_CHECK(SIGSEGV); 4019 DO_SIGNAL_CHECK(SIGILL); 4020 DO_SIGNAL_CHECK(SIGFPE); 4021 DO_SIGNAL_CHECK(SIGBUS); 4022 DO_SIGNAL_CHECK(SIGPIPE); 4023 DO_SIGNAL_CHECK(SIGXFSZ); 4024 4025 // ReduceSignalUsage allows the user to override these handlers 4026 // see comments at the very top and jvm_solaris.h 4027 if (!ReduceSignalUsage) { 4028 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4029 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4030 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4031 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4032 } 4033 4034 // See comments above for using JVM1/JVM2 4035 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4036 4037} 4038 4039typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4040 4041static os_sigaction_t os_sigaction = NULL; 4042 4043void os::Solaris::check_signal_handler(int sig) { 4044 char buf[O_BUFLEN]; 4045 address jvmHandler = NULL; 4046 4047 struct sigaction act; 4048 if (os_sigaction == NULL) { 4049 // only trust the default sigaction, in case it has been interposed 4050 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4051 if (os_sigaction == NULL) return; 4052 } 4053 4054 os_sigaction(sig, (struct sigaction*)NULL, &act); 4055 4056 address thisHandler = (act.sa_flags & SA_SIGINFO) 4057 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4058 : CAST_FROM_FN_PTR(address, act.sa_handler); 4059 4060 4061 switch (sig) { 4062 case SIGSEGV: 4063 case SIGBUS: 4064 case SIGFPE: 4065 case SIGPIPE: 4066 case SIGXFSZ: 4067 case SIGILL: 4068 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4069 break; 4070 4071 case SHUTDOWN1_SIGNAL: 4072 case SHUTDOWN2_SIGNAL: 4073 case SHUTDOWN3_SIGNAL: 4074 case BREAK_SIGNAL: 4075 jvmHandler = (address)user_handler(); 4076 break; 4077 4078 default: 4079 int asynsig = os::Solaris::SIGasync(); 4080 4081 if (sig == asynsig) { 4082 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4083 } else { 4084 return; 4085 } 4086 break; 4087 } 4088 4089 4090 if (thisHandler != jvmHandler) { 4091 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4092 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4093 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4094 // No need to check this sig any longer 4095 sigaddset(&check_signal_done, sig); 4096 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN 4097 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { 4098 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", 4099 exception_name(sig, buf, O_BUFLEN)); 4100 } 4101 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4102 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4103 tty->print("expected:"); 4104 os::Posix::print_sa_flags(tty, os::Solaris::get_our_sigflags(sig)); 4105 tty->cr(); 4106 tty->print(" found:"); 4107 os::Posix::print_sa_flags(tty, act.sa_flags); 4108 tty->cr(); 4109 // No need to check this sig any longer 4110 sigaddset(&check_signal_done, sig); 4111 } 4112 4113 // Print all the signal handler state 4114 if (sigismember(&check_signal_done, sig)) { 4115 print_signal_handlers(tty, buf, O_BUFLEN); 4116 } 4117 4118} 4119 4120void os::Solaris::install_signal_handlers() { 4121 bool libjsigdone = false; 4122 signal_handlers_are_installed = true; 4123 4124 // signal-chaining 4125 typedef void (*signal_setting_t)(); 4126 signal_setting_t begin_signal_setting = NULL; 4127 signal_setting_t end_signal_setting = NULL; 4128 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4129 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4130 if (begin_signal_setting != NULL) { 4131 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4132 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4133 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4134 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4135 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4136 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4137 libjsig_is_loaded = true; 4138 if (os::Solaris::get_libjsig_version != NULL) { 4139 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4140 } 4141 assert(UseSignalChaining, "should enable signal-chaining"); 4142 } 4143 if (libjsig_is_loaded) { 4144 // Tell libjsig jvm is setting signal handlers 4145 (*begin_signal_setting)(); 4146 } 4147 4148 set_signal_handler(SIGSEGV, true, true); 4149 set_signal_handler(SIGPIPE, true, true); 4150 set_signal_handler(SIGXFSZ, true, true); 4151 set_signal_handler(SIGBUS, true, true); 4152 set_signal_handler(SIGILL, true, true); 4153 set_signal_handler(SIGFPE, true, true); 4154 4155 4156 if (os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4157 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4158 // can not register overridable signals which might be > 32 4159 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4160 // Tell libjsig jvm has finished setting signal handlers 4161 (*end_signal_setting)(); 4162 libjsigdone = true; 4163 } 4164 } 4165 4166 set_signal_handler(os::Solaris::SIGasync(), true, true); 4167 4168 if (libjsig_is_loaded && !libjsigdone) { 4169 // Tell libjsig jvm finishes setting signal handlers 4170 (*end_signal_setting)(); 4171 } 4172 4173 // We don't activate signal checker if libjsig is in place, we trust ourselves 4174 // and if UserSignalHandler is installed all bets are off. 4175 // Log that signal checking is off only if -verbose:jni is specified. 4176 if (CheckJNICalls) { 4177 if (libjsig_is_loaded) { 4178 if (PrintJNIResolving) { 4179 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4180 } 4181 check_signals = false; 4182 } 4183 if (AllowUserSignalHandlers) { 4184 if (PrintJNIResolving) { 4185 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4186 } 4187 check_signals = false; 4188 } 4189 } 4190} 4191 4192 4193void report_error(const char* file_name, int line_no, const char* title, 4194 const char* format, ...); 4195 4196// (Static) wrapper for getisax(2) call. 4197os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4198 4199// (Static) wrappers for the liblgrp API 4200os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4201os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4202os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4203os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4204os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4205os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4206os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4207os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4208os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4209 4210// (Static) wrapper for meminfo() call. 4211os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4212 4213static address resolve_symbol_lazy(const char* name) { 4214 address addr = (address) dlsym(RTLD_DEFAULT, name); 4215 if (addr == NULL) { 4216 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4217 addr = (address) dlsym(RTLD_NEXT, name); 4218 } 4219 return addr; 4220} 4221 4222static address resolve_symbol(const char* name) { 4223 address addr = resolve_symbol_lazy(name); 4224 if (addr == NULL) { 4225 fatal(dlerror()); 4226 } 4227 return addr; 4228} 4229 4230void os::Solaris::libthread_init() { 4231 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4232 4233 lwp_priocntl_init(); 4234 4235 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4236 if (func == NULL) { 4237 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4238 // Guarantee that this VM is running on an new enough OS (5.6 or 4239 // later) that it will have a new enough libthread.so. 4240 guarantee(func != NULL, "libthread.so is too old."); 4241 } 4242 4243 int size; 4244 void (*handler_info_func)(address *, int *); 4245 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4246 handler_info_func(&handler_start, &size); 4247 handler_end = handler_start + size; 4248} 4249 4250 4251int_fnP_mutex_tP os::Solaris::_mutex_lock; 4252int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4253int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4254int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4255int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4256int os::Solaris::_mutex_scope = USYNC_THREAD; 4257 4258int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4259int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4260int_fnP_cond_tP os::Solaris::_cond_signal; 4261int_fnP_cond_tP os::Solaris::_cond_broadcast; 4262int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4263int_fnP_cond_tP os::Solaris::_cond_destroy; 4264int os::Solaris::_cond_scope = USYNC_THREAD; 4265 4266void os::Solaris::synchronization_init() { 4267 if (UseLWPSynchronization) { 4268 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4269 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4270 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4271 os::Solaris::set_mutex_init(lwp_mutex_init); 4272 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4273 os::Solaris::set_mutex_scope(USYNC_THREAD); 4274 4275 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4276 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4277 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4278 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4279 os::Solaris::set_cond_init(lwp_cond_init); 4280 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4281 os::Solaris::set_cond_scope(USYNC_THREAD); 4282 } else { 4283 os::Solaris::set_mutex_scope(USYNC_THREAD); 4284 os::Solaris::set_cond_scope(USYNC_THREAD); 4285 4286 if (UsePthreads) { 4287 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4288 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4289 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4290 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4291 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4292 4293 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4294 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4295 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4296 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4297 os::Solaris::set_cond_init(pthread_cond_default_init); 4298 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4299 } else { 4300 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4301 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4302 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4303 os::Solaris::set_mutex_init(::mutex_init); 4304 os::Solaris::set_mutex_destroy(::mutex_destroy); 4305 4306 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4307 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4308 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4309 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4310 os::Solaris::set_cond_init(::cond_init); 4311 os::Solaris::set_cond_destroy(::cond_destroy); 4312 } 4313 } 4314} 4315 4316bool os::Solaris::liblgrp_init() { 4317 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4318 if (handle != NULL) { 4319 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4320 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4321 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4322 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4323 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4324 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4325 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4326 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4327 dlsym(handle, "lgrp_cookie_stale"))); 4328 4329 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4330 set_lgrp_cookie(c); 4331 return true; 4332 } 4333 return false; 4334} 4335 4336void os::Solaris::misc_sym_init() { 4337 address func; 4338 4339 // getisax 4340 func = resolve_symbol_lazy("getisax"); 4341 if (func != NULL) { 4342 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4343 } 4344 4345 // meminfo 4346 func = resolve_symbol_lazy("meminfo"); 4347 if (func != NULL) { 4348 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4349 } 4350} 4351 4352uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4353 assert(_getisax != NULL, "_getisax not set"); 4354 return _getisax(array, n); 4355} 4356 4357// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4358typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4359static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4360 4361void init_pset_getloadavg_ptr(void) { 4362 pset_getloadavg_ptr = 4363 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4364 if (pset_getloadavg_ptr == NULL) { 4365 log_warning(os)("pset_getloadavg function not found"); 4366 } 4367} 4368 4369int os::Solaris::_dev_zero_fd = -1; 4370 4371// this is called _before_ the global arguments have been parsed 4372void os::init(void) { 4373 _initial_pid = getpid(); 4374 4375 max_hrtime = first_hrtime = gethrtime(); 4376 4377 init_random(1234567); 4378 4379 page_size = sysconf(_SC_PAGESIZE); 4380 if (page_size == -1) { 4381 fatal("os_solaris.cpp: os::init: sysconf failed (%s)", os::strerror(errno)); 4382 } 4383 init_page_sizes((size_t) page_size); 4384 4385 Solaris::initialize_system_info(); 4386 4387 // Initialize misc. symbols as soon as possible, so we can use them 4388 // if we need them. 4389 Solaris::misc_sym_init(); 4390 4391 int fd = ::open("/dev/zero", O_RDWR); 4392 if (fd < 0) { 4393 fatal("os::init: cannot open /dev/zero (%s)", os::strerror(errno)); 4394 } else { 4395 Solaris::set_dev_zero_fd(fd); 4396 4397 // Close on exec, child won't inherit. 4398 fcntl(fd, F_SETFD, FD_CLOEXEC); 4399 } 4400 4401 clock_tics_per_sec = CLK_TCK; 4402 4403 // check if dladdr1() exists; dladdr1 can provide more information than 4404 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4405 // and is available on linker patches for 5.7 and 5.8. 4406 // libdl.so must have been loaded, this call is just an entry lookup 4407 void * hdl = dlopen("libdl.so", RTLD_NOW); 4408 if (hdl) { 4409 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4410 } 4411 4412 // (Solaris only) this switches to calls that actually do locking. 4413 ThreadCritical::initialize(); 4414 4415 main_thread = thr_self(); 4416 4417 // Constant minimum stack size allowed. It must be at least 4418 // the minimum of what the OS supports (thr_min_stack()), and 4419 // enough to allow the thread to get to user bytecode execution. 4420 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4421 4422 // retrieve entry point for pthread_setname_np 4423 void * handle = dlopen("libc.so.1", RTLD_LAZY); 4424 if (handle != NULL) { 4425 Solaris::_pthread_setname_np = 4426 (Solaris::pthread_setname_np_func_t)dlsym(handle, "pthread_setname_np"); 4427 } 4428} 4429 4430// To install functions for atexit system call 4431extern "C" { 4432 static void perfMemory_exit_helper() { 4433 perfMemory_exit(); 4434 } 4435} 4436 4437// this is called _after_ the global arguments have been parsed 4438jint os::init_2(void) { 4439 // try to enable extended file IO ASAP, see 6431278 4440 os::Solaris::try_enable_extended_io(); 4441 4442 // Allocate a single page and mark it as readable for safepoint polling. Also 4443 // use this first mmap call to check support for MAP_ALIGN. 4444 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4445 page_size, 4446 MAP_PRIVATE | MAP_ALIGN, 4447 PROT_READ); 4448 if (polling_page == NULL) { 4449 has_map_align = false; 4450 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4451 PROT_READ); 4452 } 4453 4454 os::set_polling_page(polling_page); 4455 log_info(os)("SafePoint Polling address: " INTPTR_FORMAT, p2i(polling_page)); 4456 4457 if (!UseMembar) { 4458 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE); 4459 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4460 os::set_memory_serialize_page(mem_serialize_page); 4461 log_info(os)("Memory Serialize Page address: " INTPTR_FORMAT, p2i(mem_serialize_page)); 4462 } 4463 4464 // Check minimum allowable stack size for thread creation and to initialize 4465 // the java system classes, including StackOverflowError - depends on page 4466 // size. Add a page for compiler2 recursion in main thread. 4467 // Add in 2*BytesPerWord times page size to account for VM stack during 4468 // class initialization depending on 32 or 64 bit VM. 4469 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4470 JavaThread::stack_guard_zone_size() + 4471 JavaThread::stack_shadow_zone_size() + 4472 (2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 4473 4474 size_t threadStackSizeInBytes = ThreadStackSize * K; 4475 if (threadStackSizeInBytes != 0 && 4476 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 4477 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4478 os::Solaris::min_stack_allowed/K); 4479 return JNI_ERR; 4480 } 4481 4482 // For 64kbps there will be a 64kb page size, which makes 4483 // the usable default stack size quite a bit less. Increase the 4484 // stack for 64kb (or any > than 8kb) pages, this increases 4485 // virtual memory fragmentation (since we're not creating the 4486 // stack on a power of 2 boundary. The real fix for this 4487 // should be to fix the guard page mechanism. 4488 4489 if (vm_page_size() > 8*K) { 4490 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4491 ? threadStackSizeInBytes + 4492 JavaThread::stack_red_zone_size() + 4493 JavaThread::stack_yellow_zone_size() 4494 : 0; 4495 ThreadStackSize = threadStackSizeInBytes/K; 4496 } 4497 4498 // Make the stack size a multiple of the page size so that 4499 // the yellow/red zones can be guarded. 4500 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4501 vm_page_size())); 4502 4503 Solaris::libthread_init(); 4504 4505 if (UseNUMA) { 4506 if (!Solaris::liblgrp_init()) { 4507 UseNUMA = false; 4508 } else { 4509 size_t lgrp_limit = os::numa_get_groups_num(); 4510 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 4511 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4512 FREE_C_HEAP_ARRAY(int, lgrp_ids); 4513 if (lgrp_num < 2) { 4514 // There's only one locality group, disable NUMA. 4515 UseNUMA = false; 4516 } 4517 } 4518 if (!UseNUMA && ForceNUMA) { 4519 UseNUMA = true; 4520 } 4521 } 4522 4523 Solaris::signal_sets_init(); 4524 Solaris::init_signal_mem(); 4525 Solaris::install_signal_handlers(); 4526 4527 if (libjsigversion < JSIG_VERSION_1_4_1) { 4528 Maxlibjsigsigs = OLDMAXSIGNUM; 4529 } 4530 4531 // initialize synchronization primitives to use either thread or 4532 // lwp synchronization (controlled by UseLWPSynchronization) 4533 Solaris::synchronization_init(); 4534 4535 if (MaxFDLimit) { 4536 // set the number of file descriptors to max. print out error 4537 // if getrlimit/setrlimit fails but continue regardless. 4538 struct rlimit nbr_files; 4539 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4540 if (status != 0) { 4541 log_info(os)("os::init_2 getrlimit failed: %s", os::strerror(errno)); 4542 } else { 4543 nbr_files.rlim_cur = nbr_files.rlim_max; 4544 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4545 if (status != 0) { 4546 log_info(os)("os::init_2 setrlimit failed: %s", os::strerror(errno)); 4547 } 4548 } 4549 } 4550 4551 // Calculate theoretical max. size of Threads to guard gainst 4552 // artifical out-of-memory situations, where all available address- 4553 // space has been reserved by thread stacks. Default stack size is 1Mb. 4554 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4555 JavaThread::stack_size_at_create() : (1*K*K); 4556 assert(pre_thread_stack_size != 0, "Must have a stack"); 4557 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4558 // we should start doing Virtual Memory banging. Currently when the threads will 4559 // have used all but 200Mb of space. 4560 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4561 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4562 4563 // at-exit methods are called in the reverse order of their registration. 4564 // In Solaris 7 and earlier, atexit functions are called on return from 4565 // main or as a result of a call to exit(3C). There can be only 32 of 4566 // these functions registered and atexit() does not set errno. In Solaris 4567 // 8 and later, there is no limit to the number of functions registered 4568 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4569 // functions are called upon dlclose(3DL) in addition to return from main 4570 // and exit(3C). 4571 4572 if (PerfAllowAtExitRegistration) { 4573 // only register atexit functions if PerfAllowAtExitRegistration is set. 4574 // atexit functions can be delayed until process exit time, which 4575 // can be problematic for embedded VM situations. Embedded VMs should 4576 // call DestroyJavaVM() to assure that VM resources are released. 4577 4578 // note: perfMemory_exit_helper atexit function may be removed in 4579 // the future if the appropriate cleanup code can be added to the 4580 // VM_Exit VMOperation's doit method. 4581 if (atexit(perfMemory_exit_helper) != 0) { 4582 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4583 } 4584 } 4585 4586 // Init pset_loadavg function pointer 4587 init_pset_getloadavg_ptr(); 4588 4589 return JNI_OK; 4590} 4591 4592// Mark the polling page as unreadable 4593void os::make_polling_page_unreadable(void) { 4594 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) { 4595 fatal("Could not disable polling page"); 4596 } 4597} 4598 4599// Mark the polling page as readable 4600void os::make_polling_page_readable(void) { 4601 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) { 4602 fatal("Could not enable polling page"); 4603 } 4604} 4605 4606// OS interface. 4607 4608bool os::check_heap(bool force) { return true; } 4609 4610// Is a (classpath) directory empty? 4611bool os::dir_is_empty(const char* path) { 4612 DIR *dir = NULL; 4613 struct dirent *ptr; 4614 4615 dir = opendir(path); 4616 if (dir == NULL) return true; 4617 4618 // Scan the directory 4619 bool result = true; 4620 char buf[sizeof(struct dirent) + MAX_PATH]; 4621 struct dirent *dbuf = (struct dirent *) buf; 4622 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4623 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4624 result = false; 4625 } 4626 } 4627 closedir(dir); 4628 return result; 4629} 4630 4631// This code originates from JDK's sysOpen and open64_w 4632// from src/solaris/hpi/src/system_md.c 4633 4634int os::open(const char *path, int oflag, int mode) { 4635 if (strlen(path) > MAX_PATH - 1) { 4636 errno = ENAMETOOLONG; 4637 return -1; 4638 } 4639 int fd; 4640 4641 fd = ::open64(path, oflag, mode); 4642 if (fd == -1) return -1; 4643 4644 // If the open succeeded, the file might still be a directory 4645 { 4646 struct stat64 buf64; 4647 int ret = ::fstat64(fd, &buf64); 4648 int st_mode = buf64.st_mode; 4649 4650 if (ret != -1) { 4651 if ((st_mode & S_IFMT) == S_IFDIR) { 4652 errno = EISDIR; 4653 ::close(fd); 4654 return -1; 4655 } 4656 } else { 4657 ::close(fd); 4658 return -1; 4659 } 4660 } 4661 4662 // 32-bit Solaris systems suffer from: 4663 // 4664 // - an historical default soft limit of 256 per-process file 4665 // descriptors that is too low for many Java programs. 4666 // 4667 // - a design flaw where file descriptors created using stdio 4668 // fopen must be less than 256, _even_ when the first limit above 4669 // has been raised. This can cause calls to fopen (but not calls to 4670 // open, for example) to fail mysteriously, perhaps in 3rd party 4671 // native code (although the JDK itself uses fopen). One can hardly 4672 // criticize them for using this most standard of all functions. 4673 // 4674 // We attempt to make everything work anyways by: 4675 // 4676 // - raising the soft limit on per-process file descriptors beyond 4677 // 256 4678 // 4679 // - As of Solaris 10u4, we can request that Solaris raise the 256 4680 // stdio fopen limit by calling function enable_extended_FILE_stdio. 4681 // This is done in init_2 and recorded in enabled_extended_FILE_stdio 4682 // 4683 // - If we are stuck on an old (pre 10u4) Solaris system, we can 4684 // workaround the bug by remapping non-stdio file descriptors below 4685 // 256 to ones beyond 256, which is done below. 4686 // 4687 // See: 4688 // 1085341: 32-bit stdio routines should support file descriptors >255 4689 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files 4690 // 6431278: Netbeans crash on 32 bit Solaris: need to call 4691 // enable_extended_FILE_stdio() in VM initialisation 4692 // Giri Mandalika's blog 4693 // http://technopark02.blogspot.com/2005_05_01_archive.html 4694 // 4695#ifndef _LP64 4696 if ((!enabled_extended_FILE_stdio) && fd < 256) { 4697 int newfd = ::fcntl(fd, F_DUPFD, 256); 4698 if (newfd != -1) { 4699 ::close(fd); 4700 fd = newfd; 4701 } 4702 } 4703#endif // 32-bit Solaris 4704 4705 // All file descriptors that are opened in the JVM and not 4706 // specifically destined for a subprocess should have the 4707 // close-on-exec flag set. If we don't set it, then careless 3rd 4708 // party native code might fork and exec without closing all 4709 // appropriate file descriptors (e.g. as we do in closeDescriptors in 4710 // UNIXProcess.c), and this in turn might: 4711 // 4712 // - cause end-of-file to fail to be detected on some file 4713 // descriptors, resulting in mysterious hangs, or 4714 // 4715 // - might cause an fopen in the subprocess to fail on a system 4716 // suffering from bug 1085341. 4717 // 4718 // (Yes, the default setting of the close-on-exec flag is a Unix 4719 // design flaw) 4720 // 4721 // See: 4722 // 1085341: 32-bit stdio routines should support file descriptors >255 4723 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed 4724 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 4725 // 4726#ifdef FD_CLOEXEC 4727 { 4728 int flags = ::fcntl(fd, F_GETFD); 4729 if (flags != -1) { 4730 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 4731 } 4732 } 4733#endif 4734 4735 return fd; 4736} 4737 4738// create binary file, rewriting existing file if required 4739int os::create_binary_file(const char* path, bool rewrite_existing) { 4740 int oflags = O_WRONLY | O_CREAT; 4741 if (!rewrite_existing) { 4742 oflags |= O_EXCL; 4743 } 4744 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4745} 4746 4747// return current position of file pointer 4748jlong os::current_file_offset(int fd) { 4749 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4750} 4751 4752// move file pointer to the specified offset 4753jlong os::seek_to_file_offset(int fd, jlong offset) { 4754 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4755} 4756 4757jlong os::lseek(int fd, jlong offset, int whence) { 4758 return (jlong) ::lseek64(fd, offset, whence); 4759} 4760 4761char * os::native_path(char *path) { 4762 return path; 4763} 4764 4765int os::ftruncate(int fd, jlong length) { 4766 return ::ftruncate64(fd, length); 4767} 4768 4769int os::fsync(int fd) { 4770 RESTARTABLE_RETURN_INT(::fsync(fd)); 4771} 4772 4773int os::available(int fd, jlong *bytes) { 4774 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 4775 "Assumed _thread_in_native"); 4776 jlong cur, end; 4777 int mode; 4778 struct stat64 buf64; 4779 4780 if (::fstat64(fd, &buf64) >= 0) { 4781 mode = buf64.st_mode; 4782 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 4783 int n,ioctl_return; 4784 4785 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return); 4786 if (ioctl_return>= 0) { 4787 *bytes = n; 4788 return 1; 4789 } 4790 } 4791 } 4792 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 4793 return 0; 4794 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 4795 return 0; 4796 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 4797 return 0; 4798 } 4799 *bytes = end - cur; 4800 return 1; 4801} 4802 4803// Map a block of memory. 4804char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4805 char *addr, size_t bytes, bool read_only, 4806 bool allow_exec) { 4807 int prot; 4808 int flags; 4809 4810 if (read_only) { 4811 prot = PROT_READ; 4812 flags = MAP_SHARED; 4813 } else { 4814 prot = PROT_READ | PROT_WRITE; 4815 flags = MAP_PRIVATE; 4816 } 4817 4818 if (allow_exec) { 4819 prot |= PROT_EXEC; 4820 } 4821 4822 if (addr != NULL) { 4823 flags |= MAP_FIXED; 4824 } 4825 4826 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4827 fd, file_offset); 4828 if (mapped_address == MAP_FAILED) { 4829 return NULL; 4830 } 4831 return mapped_address; 4832} 4833 4834 4835// Remap a block of memory. 4836char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 4837 char *addr, size_t bytes, bool read_only, 4838 bool allow_exec) { 4839 // same as map_memory() on this OS 4840 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4841 allow_exec); 4842} 4843 4844 4845// Unmap a block of memory. 4846bool os::pd_unmap_memory(char* addr, size_t bytes) { 4847 return munmap(addr, bytes) == 0; 4848} 4849 4850void os::pause() { 4851 char filename[MAX_PATH]; 4852 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4853 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4854 } else { 4855 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4856 } 4857 4858 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4859 if (fd != -1) { 4860 struct stat buf; 4861 ::close(fd); 4862 while (::stat(filename, &buf) == 0) { 4863 (void)::poll(NULL, 0, 100); 4864 } 4865 } else { 4866 jio_fprintf(stderr, 4867 "Could not open pause file '%s', continuing immediately.\n", filename); 4868 } 4869} 4870 4871#ifndef PRODUCT 4872#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4873// Turn this on if you need to trace synch operations. 4874// Set RECORD_SYNCH_LIMIT to a large-enough value, 4875// and call record_synch_enable and record_synch_disable 4876// around the computation of interest. 4877 4878void record_synch(char* name, bool returning); // defined below 4879 4880class RecordSynch { 4881 char* _name; 4882 public: 4883 RecordSynch(char* name) :_name(name) { record_synch(_name, false); } 4884 ~RecordSynch() { record_synch(_name, true); } 4885}; 4886 4887#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 4888extern "C" ret name params { \ 4889 typedef ret name##_t params; \ 4890 static name##_t* implem = NULL; \ 4891 static int callcount = 0; \ 4892 if (implem == NULL) { \ 4893 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 4894 if (implem == NULL) fatal(dlerror()); \ 4895 } \ 4896 ++callcount; \ 4897 RecordSynch _rs(#name); \ 4898 inner; \ 4899 return implem args; \ 4900} 4901// in dbx, examine callcounts this way: 4902// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 4903 4904#define CHECK_POINTER_OK(p) \ 4905 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 4906#define CHECK_MU \ 4907 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 4908#define CHECK_CV \ 4909 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 4910#define CHECK_P(p) \ 4911 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 4912 4913#define CHECK_MUTEX(mutex_op) \ 4914 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 4915 4916CHECK_MUTEX( mutex_lock) 4917CHECK_MUTEX( _mutex_lock) 4918CHECK_MUTEX( mutex_unlock) 4919CHECK_MUTEX(_mutex_unlock) 4920CHECK_MUTEX( mutex_trylock) 4921CHECK_MUTEX(_mutex_trylock) 4922 4923#define CHECK_COND(cond_op) \ 4924 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV); 4925 4926CHECK_COND( cond_wait); 4927CHECK_COND(_cond_wait); 4928CHECK_COND(_cond_wait_cancel); 4929 4930#define CHECK_COND2(cond_op) \ 4931 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV); 4932 4933CHECK_COND2( cond_timedwait); 4934CHECK_COND2(_cond_timedwait); 4935CHECK_COND2(_cond_timedwait_cancel); 4936 4937// do the _lwp_* versions too 4938#define mutex_t lwp_mutex_t 4939#define cond_t lwp_cond_t 4940CHECK_MUTEX( _lwp_mutex_lock) 4941CHECK_MUTEX( _lwp_mutex_unlock) 4942CHECK_MUTEX( _lwp_mutex_trylock) 4943CHECK_MUTEX( __lwp_mutex_lock) 4944CHECK_MUTEX( __lwp_mutex_unlock) 4945CHECK_MUTEX( __lwp_mutex_trylock) 4946CHECK_MUTEX(___lwp_mutex_lock) 4947CHECK_MUTEX(___lwp_mutex_unlock) 4948 4949CHECK_COND( _lwp_cond_wait); 4950CHECK_COND( __lwp_cond_wait); 4951CHECK_COND(___lwp_cond_wait); 4952 4953CHECK_COND2( _lwp_cond_timedwait); 4954CHECK_COND2( __lwp_cond_timedwait); 4955#undef mutex_t 4956#undef cond_t 4957 4958CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4959CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4960CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 4961CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 4962CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4963CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4964CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4965CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4966 4967 4968// recording machinery: 4969 4970enum { RECORD_SYNCH_LIMIT = 200 }; 4971char* record_synch_name[RECORD_SYNCH_LIMIT]; 4972void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 4973bool record_synch_returning[RECORD_SYNCH_LIMIT]; 4974thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 4975int record_synch_count = 0; 4976bool record_synch_enabled = false; 4977 4978// in dbx, examine recorded data this way: 4979// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 4980 4981void record_synch(char* name, bool returning) { 4982 if (record_synch_enabled) { 4983 if (record_synch_count < RECORD_SYNCH_LIMIT) { 4984 record_synch_name[record_synch_count] = name; 4985 record_synch_returning[record_synch_count] = returning; 4986 record_synch_thread[record_synch_count] = thr_self(); 4987 record_synch_arg0ptr[record_synch_count] = &name; 4988 record_synch_count++; 4989 } 4990 // put more checking code here: 4991 // ... 4992 } 4993} 4994 4995void record_synch_enable() { 4996 // start collecting trace data, if not already doing so 4997 if (!record_synch_enabled) record_synch_count = 0; 4998 record_synch_enabled = true; 4999} 5000 5001void record_synch_disable() { 5002 // stop collecting trace data 5003 record_synch_enabled = false; 5004} 5005 5006#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5007#endif // PRODUCT 5008 5009const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5010const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5011 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5012 5013 5014// JVMTI & JVM monitoring and management support 5015// The thread_cpu_time() and current_thread_cpu_time() are only 5016// supported if is_thread_cpu_time_supported() returns true. 5017// They are not supported on Solaris T1. 5018 5019// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5020// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5021// of a thread. 5022// 5023// current_thread_cpu_time() and thread_cpu_time(Thread *) 5024// returns the fast estimate available on the platform. 5025 5026// hrtime_t gethrvtime() return value includes 5027// user time but does not include system time 5028jlong os::current_thread_cpu_time() { 5029 return (jlong) gethrvtime(); 5030} 5031 5032jlong os::thread_cpu_time(Thread *thread) { 5033 // return user level CPU time only to be consistent with 5034 // what current_thread_cpu_time returns. 5035 // thread_cpu_time_info() must be changed if this changes 5036 return os::thread_cpu_time(thread, false /* user time only */); 5037} 5038 5039jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5040 if (user_sys_cpu_time) { 5041 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5042 } else { 5043 return os::current_thread_cpu_time(); 5044 } 5045} 5046 5047jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5048 char proc_name[64]; 5049 int count; 5050 prusage_t prusage; 5051 jlong lwp_time; 5052 int fd; 5053 5054 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5055 getpid(), 5056 thread->osthread()->lwp_id()); 5057 fd = ::open(proc_name, O_RDONLY); 5058 if (fd == -1) return -1; 5059 5060 do { 5061 count = ::pread(fd, 5062 (void *)&prusage.pr_utime, 5063 thr_time_size, 5064 thr_time_off); 5065 } while (count < 0 && errno == EINTR); 5066 ::close(fd); 5067 if (count < 0) return -1; 5068 5069 if (user_sys_cpu_time) { 5070 // user + system CPU time 5071 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5072 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5073 (jlong)prusage.pr_stime.tv_nsec + 5074 (jlong)prusage.pr_utime.tv_nsec; 5075 } else { 5076 // user level CPU time only 5077 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5078 (jlong)prusage.pr_utime.tv_nsec; 5079 } 5080 5081 return (lwp_time); 5082} 5083 5084void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5085 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5086 info_ptr->may_skip_backward = false; // elapsed time not wall time 5087 info_ptr->may_skip_forward = false; // elapsed time not wall time 5088 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5089} 5090 5091void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5092 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5093 info_ptr->may_skip_backward = false; // elapsed time not wall time 5094 info_ptr->may_skip_forward = false; // elapsed time not wall time 5095 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5096} 5097 5098bool os::is_thread_cpu_time_supported() { 5099 return true; 5100} 5101 5102// System loadavg support. Returns -1 if load average cannot be obtained. 5103// Return the load average for our processor set if the primitive exists 5104// (Solaris 9 and later). Otherwise just return system wide loadavg. 5105int os::loadavg(double loadavg[], int nelem) { 5106 if (pset_getloadavg_ptr != NULL) { 5107 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5108 } else { 5109 return ::getloadavg(loadavg, nelem); 5110 } 5111} 5112 5113//--------------------------------------------------------------------------------- 5114 5115bool os::find(address addr, outputStream* st) { 5116 Dl_info dlinfo; 5117 memset(&dlinfo, 0, sizeof(dlinfo)); 5118 if (dladdr(addr, &dlinfo) != 0) { 5119 st->print(PTR_FORMAT ": ", addr); 5120 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 5121 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5122 } else if (dlinfo.dli_fbase != NULL) { 5123 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5124 } else { 5125 st->print("<absolute address>"); 5126 } 5127 if (dlinfo.dli_fname != NULL) { 5128 st->print(" in %s", dlinfo.dli_fname); 5129 } 5130 if (dlinfo.dli_fbase != NULL) { 5131 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 5132 } 5133 st->cr(); 5134 5135 if (Verbose) { 5136 // decode some bytes around the PC 5137 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 5138 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 5139 address lowest = (address) dlinfo.dli_sname; 5140 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5141 if (begin < lowest) begin = lowest; 5142 Dl_info dlinfo2; 5143 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 5144 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) { 5145 end = (address) dlinfo2.dli_saddr; 5146 } 5147 Disassembler::decode(begin, end, st); 5148 } 5149 return true; 5150 } 5151 return false; 5152} 5153 5154// Following function has been added to support HotSparc's libjvm.so running 5155// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5156// src/solaris/hpi/native_threads in the EVM codebase. 5157// 5158// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5159// libraries and should thus be removed. We will leave it behind for a while 5160// until we no longer want to able to run on top of 1.3.0 Solaris production 5161// JDK. See 4341971. 5162 5163#define STACK_SLACK 0x800 5164 5165extern "C" { 5166 intptr_t sysThreadAvailableStackWithSlack() { 5167 stack_t st; 5168 intptr_t retval, stack_top; 5169 retval = thr_stksegment(&st); 5170 assert(retval == 0, "incorrect return value from thr_stksegment"); 5171 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5172 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5173 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5174 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5175 } 5176} 5177 5178// ObjectMonitor park-unpark infrastructure ... 5179// 5180// We implement Solaris and Linux PlatformEvents with the 5181// obvious condvar-mutex-flag triple. 5182// Another alternative that works quite well is pipes: 5183// Each PlatformEvent consists of a pipe-pair. 5184// The thread associated with the PlatformEvent 5185// calls park(), which reads from the input end of the pipe. 5186// Unpark() writes into the other end of the pipe. 5187// The write-side of the pipe must be set NDELAY. 5188// Unfortunately pipes consume a large # of handles. 5189// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5190// Using pipes for the 1st few threads might be workable, however. 5191// 5192// park() is permitted to return spuriously. 5193// Callers of park() should wrap the call to park() in 5194// an appropriate loop. A litmus test for the correct 5195// usage of park is the following: if park() were modified 5196// to immediately return 0 your code should still work, 5197// albeit degenerating to a spin loop. 5198// 5199// In a sense, park()-unpark() just provides more polite spinning 5200// and polling with the key difference over naive spinning being 5201// that a parked thread needs to be explicitly unparked() in order 5202// to wake up and to poll the underlying condition. 5203// 5204// Assumption: 5205// Only one parker can exist on an event, which is why we allocate 5206// them per-thread. Multiple unparkers can coexist. 5207// 5208// _Event transitions in park() 5209// -1 => -1 : illegal 5210// 1 => 0 : pass - return immediately 5211// 0 => -1 : block; then set _Event to 0 before returning 5212// 5213// _Event transitions in unpark() 5214// 0 => 1 : just return 5215// 1 => 1 : just return 5216// -1 => either 0 or 1; must signal target thread 5217// That is, we can safely transition _Event from -1 to either 5218// 0 or 1. 5219// 5220// _Event serves as a restricted-range semaphore. 5221// -1 : thread is blocked, i.e. there is a waiter 5222// 0 : neutral: thread is running or ready, 5223// could have been signaled after a wait started 5224// 1 : signaled - thread is running or ready 5225// 5226// Another possible encoding of _Event would be with 5227// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5228// 5229// TODO-FIXME: add DTRACE probes for: 5230// 1. Tx parks 5231// 2. Ty unparks Tx 5232// 3. Tx resumes from park 5233 5234 5235// value determined through experimentation 5236#define ROUNDINGFIX 11 5237 5238// utility to compute the abstime argument to timedwait. 5239// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5240 5241static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5242 // millis is the relative timeout time 5243 // abstime will be the absolute timeout time 5244 if (millis < 0) millis = 0; 5245 struct timeval now; 5246 int status = gettimeofday(&now, NULL); 5247 assert(status == 0, "gettimeofday"); 5248 jlong seconds = millis / 1000; 5249 jlong max_wait_period; 5250 5251 if (UseLWPSynchronization) { 5252 // forward port of fix for 4275818 (not sleeping long enough) 5253 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5254 // _lwp_cond_timedwait() used a round_down algorithm rather 5255 // than a round_up. For millis less than our roundfactor 5256 // it rounded down to 0 which doesn't meet the spec. 5257 // For millis > roundfactor we may return a bit sooner, but 5258 // since we can not accurately identify the patch level and 5259 // this has already been fixed in Solaris 9 and 8 we will 5260 // leave it alone rather than always rounding down. 5261 5262 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5263 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5264 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5265 max_wait_period = 21000000; 5266 } else { 5267 max_wait_period = 50000000; 5268 } 5269 millis %= 1000; 5270 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5271 seconds = max_wait_period; 5272 } 5273 abstime->tv_sec = now.tv_sec + seconds; 5274 long usec = now.tv_usec + millis * 1000; 5275 if (usec >= 1000000) { 5276 abstime->tv_sec += 1; 5277 usec -= 1000000; 5278 } 5279 abstime->tv_nsec = usec * 1000; 5280 return abstime; 5281} 5282 5283void os::PlatformEvent::park() { // AKA: down() 5284 // Transitions for _Event: 5285 // -1 => -1 : illegal 5286 // 1 => 0 : pass - return immediately 5287 // 0 => -1 : block; then set _Event to 0 before returning 5288 5289 // Invariant: Only the thread associated with the Event/PlatformEvent 5290 // may call park(). 5291 assert(_nParked == 0, "invariant"); 5292 5293 int v; 5294 for (;;) { 5295 v = _Event; 5296 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5297 } 5298 guarantee(v >= 0, "invariant"); 5299 if (v == 0) { 5300 // Do this the hard way by blocking ... 5301 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5302 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5303 // Only for SPARC >= V8PlusA 5304#if defined(__sparc) && defined(COMPILER2) 5305 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5306#endif 5307 int status = os::Solaris::mutex_lock(_mutex); 5308 assert_status(status == 0, status, "mutex_lock"); 5309 guarantee(_nParked == 0, "invariant"); 5310 ++_nParked; 5311 while (_Event < 0) { 5312 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5313 // Treat this the same as if the wait was interrupted 5314 // With usr/lib/lwp going to kernel, always handle ETIME 5315 status = os::Solaris::cond_wait(_cond, _mutex); 5316 if (status == ETIME) status = EINTR; 5317 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5318 } 5319 --_nParked; 5320 _Event = 0; 5321 status = os::Solaris::mutex_unlock(_mutex); 5322 assert_status(status == 0, status, "mutex_unlock"); 5323 // Paranoia to ensure our locked and lock-free paths interact 5324 // correctly with each other. 5325 OrderAccess::fence(); 5326 } 5327} 5328 5329int os::PlatformEvent::park(jlong millis) { 5330 // Transitions for _Event: 5331 // -1 => -1 : illegal 5332 // 1 => 0 : pass - return immediately 5333 // 0 => -1 : block; then set _Event to 0 before returning 5334 5335 guarantee(_nParked == 0, "invariant"); 5336 int v; 5337 for (;;) { 5338 v = _Event; 5339 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5340 } 5341 guarantee(v >= 0, "invariant"); 5342 if (v != 0) return OS_OK; 5343 5344 int ret = OS_TIMEOUT; 5345 timestruc_t abst; 5346 compute_abstime(&abst, millis); 5347 5348 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5349 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5350 // Only for SPARC >= V8PlusA 5351#if defined(__sparc) && defined(COMPILER2) 5352 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5353#endif 5354 int status = os::Solaris::mutex_lock(_mutex); 5355 assert_status(status == 0, status, "mutex_lock"); 5356 guarantee(_nParked == 0, "invariant"); 5357 ++_nParked; 5358 while (_Event < 0) { 5359 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5360 assert_status(status == 0 || status == EINTR || 5361 status == ETIME || status == ETIMEDOUT, 5362 status, "cond_timedwait"); 5363 if (!FilterSpuriousWakeups) break; // previous semantics 5364 if (status == ETIME || status == ETIMEDOUT) break; 5365 // We consume and ignore EINTR and spurious wakeups. 5366 } 5367 --_nParked; 5368 if (_Event >= 0) ret = OS_OK; 5369 _Event = 0; 5370 status = os::Solaris::mutex_unlock(_mutex); 5371 assert_status(status == 0, status, "mutex_unlock"); 5372 // Paranoia to ensure our locked and lock-free paths interact 5373 // correctly with each other. 5374 OrderAccess::fence(); 5375 return ret; 5376} 5377 5378void os::PlatformEvent::unpark() { 5379 // Transitions for _Event: 5380 // 0 => 1 : just return 5381 // 1 => 1 : just return 5382 // -1 => either 0 or 1; must signal target thread 5383 // That is, we can safely transition _Event from -1 to either 5384 // 0 or 1. 5385 // See also: "Semaphores in Plan 9" by Mullender & Cox 5386 // 5387 // Note: Forcing a transition from "-1" to "1" on an unpark() means 5388 // that it will take two back-to-back park() calls for the owning 5389 // thread to block. This has the benefit of forcing a spurious return 5390 // from the first park() call after an unpark() call which will help 5391 // shake out uses of park() and unpark() without condition variables. 5392 5393 if (Atomic::xchg(1, &_Event) >= 0) return; 5394 5395 // If the thread associated with the event was parked, wake it. 5396 // Wait for the thread assoc with the PlatformEvent to vacate. 5397 int status = os::Solaris::mutex_lock(_mutex); 5398 assert_status(status == 0, status, "mutex_lock"); 5399 int AnyWaiters = _nParked; 5400 status = os::Solaris::mutex_unlock(_mutex); 5401 assert_status(status == 0, status, "mutex_unlock"); 5402 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 5403 if (AnyWaiters != 0) { 5404 // Note that we signal() *after* dropping the lock for "immortal" Events. 5405 // This is safe and avoids a common class of futile wakeups. In rare 5406 // circumstances this can cause a thread to return prematurely from 5407 // cond_{timed}wait() but the spurious wakeup is benign and the victim 5408 // will simply re-test the condition and re-park itself. 5409 // This provides particular benefit if the underlying platform does not 5410 // provide wait morphing. 5411 status = os::Solaris::cond_signal(_cond); 5412 assert_status(status == 0, status, "cond_signal"); 5413 } 5414} 5415 5416// JSR166 5417// ------------------------------------------------------- 5418 5419// The solaris and linux implementations of park/unpark are fairly 5420// conservative for now, but can be improved. They currently use a 5421// mutex/condvar pair, plus _counter. 5422// Park decrements _counter if > 0, else does a condvar wait. Unpark 5423// sets count to 1 and signals condvar. Only one thread ever waits 5424// on the condvar. Contention seen when trying to park implies that someone 5425// is unparking you, so don't wait. And spurious returns are fine, so there 5426// is no need to track notifications. 5427 5428#define MAX_SECS 100000000 5429 5430// This code is common to linux and solaris and will be moved to a 5431// common place in dolphin. 5432// 5433// The passed in time value is either a relative time in nanoseconds 5434// or an absolute time in milliseconds. Either way it has to be unpacked 5435// into suitable seconds and nanoseconds components and stored in the 5436// given timespec structure. 5437// Given time is a 64-bit value and the time_t used in the timespec is only 5438// a signed-32-bit value (except on 64-bit Linux) we have to watch for 5439// overflow if times way in the future are given. Further on Solaris versions 5440// prior to 10 there is a restriction (see cond_timedwait) that the specified 5441// number of seconds, in abstime, is less than current_time + 100,000,000. 5442// As it will be 28 years before "now + 100000000" will overflow we can 5443// ignore overflow and just impose a hard-limit on seconds using the value 5444// of "now + 100,000,000". This places a limit on the timeout of about 3.17 5445// years from "now". 5446// 5447static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5448 assert(time > 0, "convertTime"); 5449 5450 struct timeval now; 5451 int status = gettimeofday(&now, NULL); 5452 assert(status == 0, "gettimeofday"); 5453 5454 time_t max_secs = now.tv_sec + MAX_SECS; 5455 5456 if (isAbsolute) { 5457 jlong secs = time / 1000; 5458 if (secs > max_secs) { 5459 absTime->tv_sec = max_secs; 5460 } else { 5461 absTime->tv_sec = secs; 5462 } 5463 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5464 } else { 5465 jlong secs = time / NANOSECS_PER_SEC; 5466 if (secs >= MAX_SECS) { 5467 absTime->tv_sec = max_secs; 5468 absTime->tv_nsec = 0; 5469 } else { 5470 absTime->tv_sec = now.tv_sec + secs; 5471 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5472 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5473 absTime->tv_nsec -= NANOSECS_PER_SEC; 5474 ++absTime->tv_sec; // note: this must be <= max_secs 5475 } 5476 } 5477 } 5478 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5479 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5480 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5481 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5482} 5483 5484void Parker::park(bool isAbsolute, jlong time) { 5485 // Ideally we'd do something useful while spinning, such 5486 // as calling unpackTime(). 5487 5488 // Optional fast-path check: 5489 // Return immediately if a permit is available. 5490 // We depend on Atomic::xchg() having full barrier semantics 5491 // since we are doing a lock-free update to _counter. 5492 if (Atomic::xchg(0, &_counter) > 0) return; 5493 5494 // Optional fast-exit: Check interrupt before trying to wait 5495 Thread* thread = Thread::current(); 5496 assert(thread->is_Java_thread(), "Must be JavaThread"); 5497 JavaThread *jt = (JavaThread *)thread; 5498 if (Thread::is_interrupted(thread, false)) { 5499 return; 5500 } 5501 5502 // First, demultiplex/decode time arguments 5503 timespec absTime; 5504 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all 5505 return; 5506 } 5507 if (time > 0) { 5508 // Warning: this code might be exposed to the old Solaris time 5509 // round-down bugs. Grep "roundingFix" for details. 5510 unpackTime(&absTime, isAbsolute, time); 5511 } 5512 5513 // Enter safepoint region 5514 // Beware of deadlocks such as 6317397. 5515 // The per-thread Parker:: _mutex is a classic leaf-lock. 5516 // In particular a thread must never block on the Threads_lock while 5517 // holding the Parker:: mutex. If safepoints are pending both the 5518 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5519 ThreadBlockInVM tbivm(jt); 5520 5521 // Don't wait if cannot get lock since interference arises from 5522 // unblocking. Also. check interrupt before trying wait 5523 if (Thread::is_interrupted(thread, false) || 5524 os::Solaris::mutex_trylock(_mutex) != 0) { 5525 return; 5526 } 5527 5528 int status; 5529 5530 if (_counter > 0) { // no wait needed 5531 _counter = 0; 5532 status = os::Solaris::mutex_unlock(_mutex); 5533 assert(status == 0, "invariant"); 5534 // Paranoia to ensure our locked and lock-free paths interact 5535 // correctly with each other and Java-level accesses. 5536 OrderAccess::fence(); 5537 return; 5538 } 5539 5540#ifdef ASSERT 5541 // Don't catch signals while blocked; let the running threads have the signals. 5542 // (This allows a debugger to break into the running thread.) 5543 sigset_t oldsigs; 5544 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5545 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5546#endif 5547 5548 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5549 jt->set_suspend_equivalent(); 5550 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5551 5552 // Do this the hard way by blocking ... 5553 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5554 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5555 // Only for SPARC >= V8PlusA 5556#if defined(__sparc) && defined(COMPILER2) 5557 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5558#endif 5559 5560 if (time == 0) { 5561 status = os::Solaris::cond_wait(_cond, _mutex); 5562 } else { 5563 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5564 } 5565 // Note that an untimed cond_wait() can sometimes return ETIME on older 5566 // versions of the Solaris. 5567 assert_status(status == 0 || status == EINTR || 5568 status == ETIME || status == ETIMEDOUT, 5569 status, "cond_timedwait"); 5570 5571#ifdef ASSERT 5572 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); 5573#endif 5574 _counter = 0; 5575 status = os::Solaris::mutex_unlock(_mutex); 5576 assert_status(status == 0, status, "mutex_unlock"); 5577 // Paranoia to ensure our locked and lock-free paths interact 5578 // correctly with each other and Java-level accesses. 5579 OrderAccess::fence(); 5580 5581 // If externally suspended while waiting, re-suspend 5582 if (jt->handle_special_suspend_equivalent_condition()) { 5583 jt->java_suspend_self(); 5584 } 5585} 5586 5587void Parker::unpark() { 5588 int status = os::Solaris::mutex_lock(_mutex); 5589 assert(status == 0, "invariant"); 5590 const int s = _counter; 5591 _counter = 1; 5592 status = os::Solaris::mutex_unlock(_mutex); 5593 assert(status == 0, "invariant"); 5594 5595 if (s < 1) { 5596 status = os::Solaris::cond_signal(_cond); 5597 assert(status == 0, "invariant"); 5598 } 5599} 5600 5601extern char** environ; 5602 5603// Run the specified command in a separate process. Return its exit value, 5604// or -1 on failure (e.g. can't fork a new process). 5605// Unlike system(), this function can be called from signal handler. It 5606// doesn't block SIGINT et al. 5607int os::fork_and_exec(char* cmd) { 5608 char * argv[4]; 5609 argv[0] = (char *)"sh"; 5610 argv[1] = (char *)"-c"; 5611 argv[2] = cmd; 5612 argv[3] = NULL; 5613 5614 // fork is async-safe, fork1 is not so can't use in signal handler 5615 pid_t pid; 5616 Thread* t = Thread::current_or_null_safe(); 5617 if (t != NULL && t->is_inside_signal_handler()) { 5618 pid = fork(); 5619 } else { 5620 pid = fork1(); 5621 } 5622 5623 if (pid < 0) { 5624 // fork failed 5625 warning("fork failed: %s", os::strerror(errno)); 5626 return -1; 5627 5628 } else if (pid == 0) { 5629 // child process 5630 5631 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5632 execve("/usr/bin/sh", argv, environ); 5633 5634 // execve failed 5635 _exit(-1); 5636 5637 } else { 5638 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5639 // care about the actual exit code, for now. 5640 5641 int status; 5642 5643 // Wait for the child process to exit. This returns immediately if 5644 // the child has already exited. */ 5645 while (waitpid(pid, &status, 0) < 0) { 5646 switch (errno) { 5647 case ECHILD: return 0; 5648 case EINTR: break; 5649 default: return -1; 5650 } 5651 } 5652 5653 if (WIFEXITED(status)) { 5654 // The child exited normally; get its exit code. 5655 return WEXITSTATUS(status); 5656 } else if (WIFSIGNALED(status)) { 5657 // The child exited because of a signal 5658 // The best value to return is 0x80 + signal number, 5659 // because that is what all Unix shells do, and because 5660 // it allows callers to distinguish between process exit and 5661 // process death by signal. 5662 return 0x80 + WTERMSIG(status); 5663 } else { 5664 // Unknown exit code; pass it through 5665 return status; 5666 } 5667 } 5668} 5669 5670// is_headless_jre() 5671// 5672// Test for the existence of xawt/libmawt.so or libawt_xawt.so 5673// in order to report if we are running in a headless jre 5674// 5675// Since JDK8 xawt/libmawt.so was moved into the same directory 5676// as libawt.so, and renamed libawt_xawt.so 5677// 5678bool os::is_headless_jre() { 5679 struct stat statbuf; 5680 char buf[MAXPATHLEN]; 5681 char libmawtpath[MAXPATHLEN]; 5682 const char *xawtstr = "/xawt/libmawt.so"; 5683 const char *new_xawtstr = "/libawt_xawt.so"; 5684 char *p; 5685 5686 // Get path to libjvm.so 5687 os::jvm_path(buf, sizeof(buf)); 5688 5689 // Get rid of libjvm.so 5690 p = strrchr(buf, '/'); 5691 if (p == NULL) { 5692 return false; 5693 } else { 5694 *p = '\0'; 5695 } 5696 5697 // Get rid of client or server 5698 p = strrchr(buf, '/'); 5699 if (p == NULL) { 5700 return false; 5701 } else { 5702 *p = '\0'; 5703 } 5704 5705 // check xawt/libmawt.so 5706 strcpy(libmawtpath, buf); 5707 strcat(libmawtpath, xawtstr); 5708 if (::stat(libmawtpath, &statbuf) == 0) return false; 5709 5710 // check libawt_xawt.so 5711 strcpy(libmawtpath, buf); 5712 strcat(libmawtpath, new_xawtstr); 5713 if (::stat(libmawtpath, &statbuf) == 0) return false; 5714 5715 return true; 5716} 5717 5718size_t os::write(int fd, const void *buf, unsigned int nBytes) { 5719 size_t res; 5720 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 5721 return res; 5722} 5723 5724int os::close(int fd) { 5725 return ::close(fd); 5726} 5727 5728int os::socket_close(int fd) { 5729 return ::close(fd); 5730} 5731 5732int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 5733 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5734 "Assumed _thread_in_native"); 5735 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags)); 5736} 5737 5738int os::send(int fd, char* buf, size_t nBytes, uint flags) { 5739 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5740 "Assumed _thread_in_native"); 5741 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5742} 5743 5744int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 5745 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5746} 5747 5748// As both poll and select can be interrupted by signals, we have to be 5749// prepared to restart the system call after updating the timeout, unless 5750// a poll() is done with timeout == -1, in which case we repeat with this 5751// "wait forever" value. 5752 5753int os::connect(int fd, struct sockaddr *him, socklen_t len) { 5754 int _result; 5755 _result = ::connect(fd, him, len); 5756 5757 // On Solaris, when a connect() call is interrupted, the connection 5758 // can be established asynchronously (see 6343810). Subsequent calls 5759 // to connect() must check the errno value which has the semantic 5760 // described below (copied from the connect() man page). Handling 5761 // of asynchronously established connections is required for both 5762 // blocking and non-blocking sockets. 5763 // EINTR The connection attempt was interrupted 5764 // before any data arrived by the delivery of 5765 // a signal. The connection, however, will be 5766 // established asynchronously. 5767 // 5768 // EINPROGRESS The socket is non-blocking, and the connec- 5769 // tion cannot be completed immediately. 5770 // 5771 // EALREADY The socket is non-blocking, and a previous 5772 // connection attempt has not yet been com- 5773 // pleted. 5774 // 5775 // EISCONN The socket is already connected. 5776 if (_result == OS_ERR && errno == EINTR) { 5777 // restarting a connect() changes its errno semantics 5778 RESTARTABLE(::connect(fd, him, len), _result); 5779 // undo these changes 5780 if (_result == OS_ERR) { 5781 if (errno == EALREADY) { 5782 errno = EINPROGRESS; // fall through 5783 } else if (errno == EISCONN) { 5784 errno = 0; 5785 return OS_OK; 5786 } 5787 } 5788 } 5789 return _result; 5790} 5791 5792// Get the default path to the core file 5793// Returns the length of the string 5794int os::get_core_path(char* buffer, size_t bufferSize) { 5795 const char* p = get_current_directory(buffer, bufferSize); 5796 5797 if (p == NULL) { 5798 assert(p != NULL, "failed to get current directory"); 5799 return 0; 5800 } 5801 5802 jio_snprintf(buffer, bufferSize, "%s/core or core.%d", 5803 p, current_process_id()); 5804 5805 return strlen(buffer); 5806} 5807 5808#ifndef PRODUCT 5809void TestReserveMemorySpecial_test() { 5810 // No tests available for this platform 5811} 5812#endif 5813 5814bool os::start_debugging(char *buf, int buflen) { 5815 int len = (int)strlen(buf); 5816 char *p = &buf[len]; 5817 5818 jio_snprintf(p, buflen-len, 5819 "\n\n" 5820 "Do you want to debug the problem?\n\n" 5821 "To debug, run 'dbx - %d'; then switch to thread " INTX_FORMAT "\n" 5822 "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n" 5823 "Otherwise, press RETURN to abort...", 5824 os::current_process_id(), os::current_thread_id()); 5825 5826 bool yes = os::message_box("Unexpected Error", buf); 5827 5828 if (yes) { 5829 // yes, user asked VM to launch debugger 5830 jio_snprintf(buf, sizeof(buf), "dbx - %d", os::current_process_id()); 5831 5832 os::fork_and_exec(buf); 5833 yes = false; 5834 } 5835 return yes; 5836} 5837