os_solaris.cpp revision 11586:0df413195ffc
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 newly created threads 729extern "C" void* thread_native_entry(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 // Our priority was set when we were created, and stored in the 760 // osthread, but couldn't be passed through to our LWP until now. 761 // So read back the priority and set it again. 762 763 if (osthr->thread_id() != -1) { 764 if (UseThreadPriorities) { 765 int prio = osthr->native_priority(); 766 if (ThreadPriorityVerbose) { 767 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 768 INTPTR_FORMAT ", setting priority: %d\n", 769 osthr->thread_id(), osthr->lwp_id(), prio); 770 } 771 os::set_native_priority(thread, prio); 772 } 773 } else if (ThreadPriorityVerbose) { 774 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 775 } 776 777 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 778 779 // initialize signal mask for this thread 780 os::Solaris::hotspot_sigmask(thread); 781 782 thread->run(); 783 784 // One less thread is executing 785 // When the VMThread gets here, the main thread may have already exited 786 // which frees the CodeHeap containing the Atomic::dec code 787 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 788 Atomic::dec(&os::Solaris::_os_thread_count); 789 } 790 791 log_info(os, thread)("Thread finished (tid: " UINTX_FORMAT ").", os::current_thread_id()); 792 793 // If a thread has not deleted itself ("delete this") as part of its 794 // termination sequence, we have to ensure thread-local-storage is 795 // cleared before we actually terminate. No threads should ever be 796 // deleted asynchronously with respect to their termination. 797 if (Thread::current_or_null_safe() != NULL) { 798 assert(Thread::current_or_null_safe() == thread, "current thread is wrong"); 799 thread->clear_thread_current(); 800 } 801 802 if (UseDetachedThreads) { 803 thr_exit(NULL); 804 ShouldNotReachHere(); 805 } 806 return NULL; 807} 808 809static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 810 // Allocate the OSThread object 811 OSThread* osthread = new OSThread(NULL, NULL); 812 if (osthread == NULL) return NULL; 813 814 // Store info on the Solaris thread into the OSThread 815 osthread->set_thread_id(thread_id); 816 osthread->set_lwp_id(_lwp_self()); 817 thread->_schedctl = (void *) schedctl_init(); 818 819 if (UseNUMA) { 820 int lgrp_id = os::numa_get_group_id(); 821 if (lgrp_id != -1) { 822 thread->set_lgrp_id(lgrp_id); 823 } 824 } 825 826 if (ThreadPriorityVerbose) { 827 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 828 osthread->thread_id(), osthread->lwp_id()); 829 } 830 831 // Initial thread state is INITIALIZED, not SUSPENDED 832 osthread->set_state(INITIALIZED); 833 834 return osthread; 835} 836 837void os::Solaris::hotspot_sigmask(Thread* thread) { 838 //Save caller's signal mask 839 sigset_t sigmask; 840 pthread_sigmask(SIG_SETMASK, NULL, &sigmask); 841 OSThread *osthread = thread->osthread(); 842 osthread->set_caller_sigmask(sigmask); 843 844 pthread_sigmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 845 if (!ReduceSignalUsage) { 846 if (thread->is_VM_thread()) { 847 // Only the VM thread handles BREAK_SIGNAL ... 848 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); 849 } else { 850 // ... all other threads block BREAK_SIGNAL 851 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 852 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); 853 } 854 } 855} 856 857bool os::create_attached_thread(JavaThread* thread) { 858#ifdef ASSERT 859 thread->verify_not_published(); 860#endif 861 OSThread* osthread = create_os_thread(thread, thr_self()); 862 if (osthread == NULL) { 863 return false; 864 } 865 866 // Initial thread state is RUNNABLE 867 osthread->set_state(RUNNABLE); 868 thread->set_osthread(osthread); 869 870 // initialize signal mask for this thread 871 // and save the caller's signal mask 872 os::Solaris::hotspot_sigmask(thread); 873 874 log_info(os, thread)("Thread attached (tid: " UINTX_FORMAT ").", 875 os::current_thread_id()); 876 877 return true; 878} 879 880bool os::create_main_thread(JavaThread* thread) { 881#ifdef ASSERT 882 thread->verify_not_published(); 883#endif 884 if (_starting_thread == NULL) { 885 _starting_thread = create_os_thread(thread, main_thread); 886 if (_starting_thread == NULL) { 887 return false; 888 } 889 } 890 891 // The primodial thread is runnable from the start 892 _starting_thread->set_state(RUNNABLE); 893 894 thread->set_osthread(_starting_thread); 895 896 // initialize signal mask for this thread 897 // and save the caller's signal mask 898 os::Solaris::hotspot_sigmask(thread); 899 900 return true; 901} 902 903// Helper function to trace thread attributes, similar to os::Posix::describe_pthread_attr() 904static char* describe_thr_create_attributes(char* buf, size_t buflen, 905 size_t stacksize, long flags) { 906 stringStream ss(buf, buflen); 907 ss.print("stacksize: " SIZE_FORMAT "k, ", stacksize / 1024); 908 ss.print("flags: "); 909 #define PRINT_FLAG(f) if (flags & f) ss.print( #f " "); 910 #define ALL(X) \ 911 X(THR_SUSPENDED) \ 912 X(THR_DETACHED) \ 913 X(THR_BOUND) \ 914 X(THR_NEW_LWP) \ 915 X(THR_DAEMON) 916 ALL(PRINT_FLAG) 917 #undef ALL 918 #undef PRINT_FLAG 919 return buf; 920} 921 922bool os::create_thread(Thread* thread, ThreadType thr_type, 923 size_t stack_size) { 924 // Allocate the OSThread object 925 OSThread* osthread = new OSThread(NULL, NULL); 926 if (osthread == NULL) { 927 return false; 928 } 929 930 if (ThreadPriorityVerbose) { 931 char *thrtyp; 932 switch (thr_type) { 933 case vm_thread: 934 thrtyp = (char *)"vm"; 935 break; 936 case cgc_thread: 937 thrtyp = (char *)"cgc"; 938 break; 939 case pgc_thread: 940 thrtyp = (char *)"pgc"; 941 break; 942 case java_thread: 943 thrtyp = (char *)"java"; 944 break; 945 case compiler_thread: 946 thrtyp = (char *)"compiler"; 947 break; 948 case watcher_thread: 949 thrtyp = (char *)"watcher"; 950 break; 951 default: 952 thrtyp = (char *)"unknown"; 953 break; 954 } 955 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 956 } 957 958 // Calculate stack size if it's not specified by caller. 959 if (stack_size == 0) { 960 // The default stack size 1M (2M for LP64). 961 stack_size = (BytesPerWord >> 2) * K * K; 962 963 switch (thr_type) { 964 case os::java_thread: 965 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 966 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 967 break; 968 case os::compiler_thread: 969 if (CompilerThreadStackSize > 0) { 970 stack_size = (size_t)(CompilerThreadStackSize * K); 971 break; 972 } // else fall through: 973 // use VMThreadStackSize if CompilerThreadStackSize is not defined 974 case os::vm_thread: 975 case os::pgc_thread: 976 case os::cgc_thread: 977 case os::watcher_thread: 978 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 979 break; 980 } 981 } 982 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 983 984 // Initial state is ALLOCATED but not INITIALIZED 985 osthread->set_state(ALLOCATED); 986 987 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 988 // We got lots of threads. Check if we still have some address space left. 989 // Need to be at least 5Mb of unreserved address space. We do check by 990 // trying to reserve some. 991 const size_t VirtualMemoryBangSize = 20*K*K; 992 char* mem = os::reserve_memory(VirtualMemoryBangSize); 993 if (mem == NULL) { 994 delete osthread; 995 return false; 996 } else { 997 // Release the memory again 998 os::release_memory(mem, VirtualMemoryBangSize); 999 } 1000 } 1001 1002 // Setup osthread because the child thread may need it. 1003 thread->set_osthread(osthread); 1004 1005 // Create the Solaris thread 1006 thread_t tid = 0; 1007 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED; 1008 int status; 1009 1010 // Mark that we don't have an lwp or thread id yet. 1011 // In case we attempt to set the priority before the thread starts. 1012 osthread->set_lwp_id(-1); 1013 osthread->set_thread_id(-1); 1014 1015 status = thr_create(NULL, stack_size, thread_native_entry, thread, flags, &tid); 1016 1017 char buf[64]; 1018 if (status == 0) { 1019 log_info(os, thread)("Thread started (tid: " UINTX_FORMAT ", attributes: %s). ", 1020 (uintx) tid, describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags)); 1021 } else { 1022 log_warning(os, thread)("Failed to start thread - thr_create failed (%s) for attributes: %s.", 1023 os::errno_name(status), describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags)); 1024 } 1025 1026 if (status != 0) { 1027 thread->set_osthread(NULL); 1028 // Need to clean up stuff we've allocated so far 1029 delete osthread; 1030 return false; 1031 } 1032 1033 Atomic::inc(&os::Solaris::_os_thread_count); 1034 1035 // Store info on the Solaris thread into the OSThread 1036 osthread->set_thread_id(tid); 1037 1038 // Remember that we created this thread so we can set priority on it 1039 osthread->set_vm_created(); 1040 1041 // Most thread types will set an explicit priority before starting the thread, 1042 // but for those that don't we need a valid value to read back in thread_native_entry. 1043 osthread->set_native_priority(NormPriority); 1044 1045 // Initial thread state is INITIALIZED, not SUSPENDED 1046 osthread->set_state(INITIALIZED); 1047 1048 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1049 return true; 1050} 1051 1052// defined for >= Solaris 10. This allows builds on earlier versions 1053// of Solaris to take advantage of the newly reserved Solaris JVM signals. 1054// With SIGJVM1, SIGJVM2, ASYNC_SIGNAL is SIGJVM2. Previously INTERRUPT_SIGNAL 1055// was SIGJVM1. 1056// 1057#if !defined(SIGJVM1) 1058 #define SIGJVM1 39 1059 #define SIGJVM2 40 1060#endif 1061 1062debug_only(static bool signal_sets_initialized = false); 1063static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1064 1065int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1066 1067bool os::Solaris::is_sig_ignored(int sig) { 1068 struct sigaction oact; 1069 sigaction(sig, (struct sigaction*)NULL, &oact); 1070 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1071 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1072 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) { 1073 return true; 1074 } else { 1075 return false; 1076 } 1077} 1078 1079// Note: SIGRTMIN is a macro that calls sysconf() so it will 1080// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1081static bool isJVM1available() { 1082 return SIGJVM1 < SIGRTMIN; 1083} 1084 1085void os::Solaris::signal_sets_init() { 1086 // Should also have an assertion stating we are still single-threaded. 1087 assert(!signal_sets_initialized, "Already initialized"); 1088 // Fill in signals that are necessarily unblocked for all threads in 1089 // the VM. Currently, we unblock the following signals: 1090 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1091 // by -Xrs (=ReduceSignalUsage)); 1092 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1093 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1094 // the dispositions or masks wrt these signals. 1095 // Programs embedding the VM that want to use the above signals for their 1096 // own purposes must, at this time, use the "-Xrs" option to prevent 1097 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1098 // (See bug 4345157, and other related bugs). 1099 // In reality, though, unblocking these signals is really a nop, since 1100 // these signals are not blocked by default. 1101 sigemptyset(&unblocked_sigs); 1102 sigemptyset(&allowdebug_blocked_sigs); 1103 sigaddset(&unblocked_sigs, SIGILL); 1104 sigaddset(&unblocked_sigs, SIGSEGV); 1105 sigaddset(&unblocked_sigs, SIGBUS); 1106 sigaddset(&unblocked_sigs, SIGFPE); 1107 1108 // Always true on Solaris 10+ 1109 guarantee(isJVM1available(), "SIGJVM1/2 missing!"); 1110 os::Solaris::set_SIGasync(SIGJVM2); 1111 1112 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1113 1114 if (!ReduceSignalUsage) { 1115 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1116 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1117 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1118 } 1119 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1120 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1121 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1122 } 1123 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1124 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1125 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1126 } 1127 } 1128 // Fill in signals that are blocked by all but the VM thread. 1129 sigemptyset(&vm_sigs); 1130 if (!ReduceSignalUsage) { 1131 sigaddset(&vm_sigs, BREAK_SIGNAL); 1132 } 1133 debug_only(signal_sets_initialized = true); 1134 1135 // For diagnostics only used in run_periodic_checks 1136 sigemptyset(&check_signal_done); 1137} 1138 1139// These are signals that are unblocked while a thread is running Java. 1140// (For some reason, they get blocked by default.) 1141sigset_t* os::Solaris::unblocked_signals() { 1142 assert(signal_sets_initialized, "Not initialized"); 1143 return &unblocked_sigs; 1144} 1145 1146// These are the signals that are blocked while a (non-VM) thread is 1147// running Java. Only the VM thread handles these signals. 1148sigset_t* os::Solaris::vm_signals() { 1149 assert(signal_sets_initialized, "Not initialized"); 1150 return &vm_sigs; 1151} 1152 1153// These are signals that are blocked during cond_wait to allow debugger in 1154sigset_t* os::Solaris::allowdebug_blocked_signals() { 1155 assert(signal_sets_initialized, "Not initialized"); 1156 return &allowdebug_blocked_sigs; 1157} 1158 1159 1160void _handle_uncaught_cxx_exception() { 1161 VMError::report_and_die("An uncaught C++ exception"); 1162} 1163 1164 1165// First crack at OS-specific initialization, from inside the new thread. 1166void os::initialize_thread(Thread* thr) { 1167 int r = thr_main(); 1168 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 1169 if (r) { 1170 JavaThread* jt = (JavaThread *)thr; 1171 assert(jt != NULL, "Sanity check"); 1172 size_t stack_size; 1173 address base = jt->stack_base(); 1174 if (Arguments::created_by_java_launcher()) { 1175 // Use 2MB to allow for Solaris 7 64 bit mode. 1176 stack_size = JavaThread::stack_size_at_create() == 0 1177 ? 2048*K : JavaThread::stack_size_at_create(); 1178 1179 // There are rare cases when we may have already used more than 1180 // the basic stack size allotment before this method is invoked. 1181 // Attempt to allow for a normally sized java_stack. 1182 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1183 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1184 } else { 1185 // 6269555: If we were not created by a Java launcher, i.e. if we are 1186 // running embedded in a native application, treat the primordial thread 1187 // as much like a native attached thread as possible. This means using 1188 // the current stack size from thr_stksegment(), unless it is too large 1189 // to reliably setup guard pages. A reasonable max size is 8MB. 1190 size_t current_size = current_stack_size(); 1191 // This should never happen, but just in case.... 1192 if (current_size == 0) current_size = 2 * K * K; 1193 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1194 } 1195 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1196 stack_size = (size_t)(base - bottom); 1197 1198 assert(stack_size > 0, "Stack size calculation problem"); 1199 1200 if (stack_size > jt->stack_size()) { 1201#ifndef PRODUCT 1202 struct rlimit limits; 1203 getrlimit(RLIMIT_STACK, &limits); 1204 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1205 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1206#endif 1207 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n" 1208 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1209 "See limit(1) to increase the stack size limit.", 1210 stack_size / K, jt->stack_size() / K); 1211 vm_exit(1); 1212 } 1213 assert(jt->stack_size() >= stack_size, 1214 "Attempt to map more stack than was allocated"); 1215 jt->set_stack_size(stack_size); 1216 } 1217 1218 // With the T2 libthread (T1 is no longer supported) threads are always bound 1219 // and we use stackbanging in all cases. 1220 1221 os::Solaris::init_thread_fpu_state(); 1222 std::set_terminate(_handle_uncaught_cxx_exception); 1223} 1224 1225 1226 1227// Free Solaris resources related to the OSThread 1228void os::free_thread(OSThread* osthread) { 1229 assert(osthread != NULL, "os::free_thread but osthread not set"); 1230 1231 // We are told to free resources of the argument thread, 1232 // but we can only really operate on the current thread. 1233 assert(Thread::current()->osthread() == osthread, 1234 "os::free_thread but not current thread"); 1235 1236 // Restore caller's signal mask 1237 sigset_t sigmask = osthread->caller_sigmask(); 1238 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); 1239 1240 delete osthread; 1241} 1242 1243void os::pd_start_thread(Thread* thread) { 1244 int status = thr_continue(thread->osthread()->thread_id()); 1245 assert_status(status == 0, status, "thr_continue failed"); 1246} 1247 1248 1249intx os::current_thread_id() { 1250 return (intx)thr_self(); 1251} 1252 1253static pid_t _initial_pid = 0; 1254 1255int os::current_process_id() { 1256 return (int)(_initial_pid ? _initial_pid : getpid()); 1257} 1258 1259// gethrtime() should be monotonic according to the documentation, 1260// but some virtualized platforms are known to break this guarantee. 1261// getTimeNanos() must be guaranteed not to move backwards, so we 1262// are forced to add a check here. 1263inline hrtime_t getTimeNanos() { 1264 const hrtime_t now = gethrtime(); 1265 const hrtime_t prev = max_hrtime; 1266 if (now <= prev) { 1267 return prev; // same or retrograde time; 1268 } 1269 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1270 assert(obsv >= prev, "invariant"); // Monotonicity 1271 // If the CAS succeeded then we're done and return "now". 1272 // If the CAS failed and the observed value "obsv" is >= now then 1273 // we should return "obsv". If the CAS failed and now > obsv > prv then 1274 // some other thread raced this thread and installed a new value, in which case 1275 // we could either (a) retry the entire operation, (b) retry trying to install now 1276 // or (c) just return obsv. We use (c). No loop is required although in some cases 1277 // we might discard a higher "now" value in deference to a slightly lower but freshly 1278 // installed obsv value. That's entirely benign -- it admits no new orderings compared 1279 // to (a) or (b) -- and greatly reduces coherence traffic. 1280 // We might also condition (c) on the magnitude of the delta between obsv and now. 1281 // Avoiding excessive CAS operations to hot RW locations is critical. 1282 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate 1283 return (prev == obsv) ? now : obsv; 1284} 1285 1286// Time since start-up in seconds to a fine granularity. 1287// Used by VMSelfDestructTimer and the MemProfiler. 1288double os::elapsedTime() { 1289 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1290} 1291 1292jlong os::elapsed_counter() { 1293 return (jlong)(getTimeNanos() - first_hrtime); 1294} 1295 1296jlong os::elapsed_frequency() { 1297 return hrtime_hz; 1298} 1299 1300// Return the real, user, and system times in seconds from an 1301// arbitrary fixed point in the past. 1302bool os::getTimesSecs(double* process_real_time, 1303 double* process_user_time, 1304 double* process_system_time) { 1305 struct tms ticks; 1306 clock_t real_ticks = times(&ticks); 1307 1308 if (real_ticks == (clock_t) (-1)) { 1309 return false; 1310 } else { 1311 double ticks_per_second = (double) clock_tics_per_sec; 1312 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1313 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1314 // For consistency return the real time from getTimeNanos() 1315 // converted to seconds. 1316 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1317 1318 return true; 1319 } 1320} 1321 1322bool os::supports_vtime() { return true; } 1323bool os::enable_vtime() { return false; } 1324bool os::vtime_enabled() { return false; } 1325 1326double os::elapsedVTime() { 1327 return (double)gethrvtime() / (double)hrtime_hz; 1328} 1329 1330// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1331jlong os::javaTimeMillis() { 1332 timeval t; 1333 if (gettimeofday(&t, NULL) == -1) { 1334 fatal("os::javaTimeMillis: gettimeofday (%s)", os::strerror(errno)); 1335 } 1336 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1337} 1338 1339// Must return seconds+nanos since Jan 1 1970. This must use the same 1340// time source as javaTimeMillis and can't use get_nsec_fromepoch as 1341// we need better than 1ms accuracy 1342void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) { 1343 timeval t; 1344 if (gettimeofday(&t, NULL) == -1) { 1345 fatal("os::javaTimeSystemUTC: gettimeofday (%s)", os::strerror(errno)); 1346 } 1347 seconds = jlong(t.tv_sec); 1348 nanos = jlong(t.tv_usec) * 1000; 1349} 1350 1351 1352jlong os::javaTimeNanos() { 1353 return (jlong)getTimeNanos(); 1354} 1355 1356void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1357 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1358 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1359 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1360 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1361} 1362 1363char * os::local_time_string(char *buf, size_t buflen) { 1364 struct tm t; 1365 time_t long_time; 1366 time(&long_time); 1367 localtime_r(&long_time, &t); 1368 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1369 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1370 t.tm_hour, t.tm_min, t.tm_sec); 1371 return buf; 1372} 1373 1374// Note: os::shutdown() might be called very early during initialization, or 1375// called from signal handler. Before adding something to os::shutdown(), make 1376// sure it is async-safe and can handle partially initialized VM. 1377void os::shutdown() { 1378 1379 // allow PerfMemory to attempt cleanup of any persistent resources 1380 perfMemory_exit(); 1381 1382 // needs to remove object in file system 1383 AttachListener::abort(); 1384 1385 // flush buffered output, finish log files 1386 ostream_abort(); 1387 1388 // Check for abort hook 1389 abort_hook_t abort_hook = Arguments::abort_hook(); 1390 if (abort_hook != NULL) { 1391 abort_hook(); 1392 } 1393} 1394 1395// Note: os::abort() might be called very early during initialization, or 1396// called from signal handler. Before adding something to os::abort(), make 1397// sure it is async-safe and can handle partially initialized VM. 1398void os::abort(bool dump_core, void* siginfo, const void* context) { 1399 os::shutdown(); 1400 if (dump_core) { 1401#ifndef PRODUCT 1402 fdStream out(defaultStream::output_fd()); 1403 out.print_raw("Current thread is "); 1404 char buf[16]; 1405 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1406 out.print_raw_cr(buf); 1407 out.print_raw_cr("Dumping core ..."); 1408#endif 1409 ::abort(); // dump core (for debugging) 1410 } 1411 1412 ::exit(1); 1413} 1414 1415// Die immediately, no exit hook, no abort hook, no cleanup. 1416void os::die() { 1417 ::abort(); // dump core (for debugging) 1418} 1419 1420// DLL functions 1421 1422const char* os::dll_file_extension() { return ".so"; } 1423 1424// This must be hard coded because it's the system's temporary 1425// directory not the java application's temp directory, ala java.io.tmpdir. 1426const char* os::get_temp_directory() { return "/tmp"; } 1427 1428static bool file_exists(const char* filename) { 1429 struct stat statbuf; 1430 if (filename == NULL || strlen(filename) == 0) { 1431 return false; 1432 } 1433 return os::stat(filename, &statbuf) == 0; 1434} 1435 1436bool os::dll_build_name(char* buffer, size_t buflen, 1437 const char* pname, const char* fname) { 1438 bool retval = false; 1439 const size_t pnamelen = pname ? strlen(pname) : 0; 1440 1441 // Return error on buffer overflow. 1442 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1443 return retval; 1444 } 1445 1446 if (pnamelen == 0) { 1447 snprintf(buffer, buflen, "lib%s.so", fname); 1448 retval = true; 1449 } else if (strchr(pname, *os::path_separator()) != NULL) { 1450 int n; 1451 char** pelements = split_path(pname, &n); 1452 if (pelements == NULL) { 1453 return false; 1454 } 1455 for (int i = 0; i < n; i++) { 1456 // really shouldn't be NULL but what the heck, check can't hurt 1457 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1458 continue; // skip the empty path values 1459 } 1460 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1461 if (file_exists(buffer)) { 1462 retval = true; 1463 break; 1464 } 1465 } 1466 // release the storage 1467 for (int i = 0; i < n; i++) { 1468 if (pelements[i] != NULL) { 1469 FREE_C_HEAP_ARRAY(char, pelements[i]); 1470 } 1471 } 1472 if (pelements != NULL) { 1473 FREE_C_HEAP_ARRAY(char*, pelements); 1474 } 1475 } else { 1476 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1477 retval = true; 1478 } 1479 return retval; 1480} 1481 1482// check if addr is inside libjvm.so 1483bool os::address_is_in_vm(address addr) { 1484 static address libjvm_base_addr; 1485 Dl_info dlinfo; 1486 1487 if (libjvm_base_addr == NULL) { 1488 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { 1489 libjvm_base_addr = (address)dlinfo.dli_fbase; 1490 } 1491 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1492 } 1493 1494 if (dladdr((void *)addr, &dlinfo) != 0) { 1495 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1496 } 1497 1498 return false; 1499} 1500 1501typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int); 1502static dladdr1_func_type dladdr1_func = NULL; 1503 1504bool os::dll_address_to_function_name(address addr, char *buf, 1505 int buflen, int * offset, 1506 bool demangle) { 1507 // buf is not optional, but offset is optional 1508 assert(buf != NULL, "sanity check"); 1509 1510 Dl_info dlinfo; 1511 1512 // dladdr1_func was initialized in os::init() 1513 if (dladdr1_func != NULL) { 1514 // yes, we have dladdr1 1515 1516 // Support for dladdr1 is checked at runtime; it may be 1517 // available even if the vm is built on a machine that does 1518 // not have dladdr1 support. Make sure there is a value for 1519 // RTLD_DL_SYMENT. 1520#ifndef RTLD_DL_SYMENT 1521 #define RTLD_DL_SYMENT 1 1522#endif 1523#ifdef _LP64 1524 Elf64_Sym * info; 1525#else 1526 Elf32_Sym * info; 1527#endif 1528 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1529 RTLD_DL_SYMENT) != 0) { 1530 // see if we have a matching symbol that covers our address 1531 if (dlinfo.dli_saddr != NULL && 1532 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1533 if (dlinfo.dli_sname != NULL) { 1534 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1535 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1536 } 1537 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1538 return true; 1539 } 1540 } 1541 // no matching symbol so try for just file info 1542 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1543 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1544 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1545 return true; 1546 } 1547 } 1548 } 1549 buf[0] = '\0'; 1550 if (offset != NULL) *offset = -1; 1551 return false; 1552 } 1553 1554 // no, only dladdr is available 1555 if (dladdr((void *)addr, &dlinfo) != 0) { 1556 // see if we have a matching symbol 1557 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { 1558 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1559 jio_snprintf(buf, buflen, dlinfo.dli_sname); 1560 } 1561 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1562 return true; 1563 } 1564 // no matching symbol so try for just file info 1565 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1566 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1567 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1568 return true; 1569 } 1570 } 1571 } 1572 buf[0] = '\0'; 1573 if (offset != NULL) *offset = -1; 1574 return false; 1575} 1576 1577bool os::dll_address_to_library_name(address addr, char* buf, 1578 int buflen, int* offset) { 1579 // buf is not optional, but offset is optional 1580 assert(buf != NULL, "sanity check"); 1581 1582 Dl_info dlinfo; 1583 1584 if (dladdr((void*)addr, &dlinfo) != 0) { 1585 if (dlinfo.dli_fname != NULL) { 1586 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1587 } 1588 if (dlinfo.dli_fbase != NULL && offset != NULL) { 1589 *offset = addr - (address)dlinfo.dli_fbase; 1590 } 1591 return true; 1592 } 1593 1594 buf[0] = '\0'; 1595 if (offset) *offset = -1; 1596 return false; 1597} 1598 1599int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) { 1600 Dl_info dli; 1601 // Sanity check? 1602 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 || 1603 dli.dli_fname == NULL) { 1604 return 1; 1605 } 1606 1607 void * handle = dlopen(dli.dli_fname, RTLD_LAZY); 1608 if (handle == NULL) { 1609 return 1; 1610 } 1611 1612 Link_map *map; 1613 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1614 if (map == NULL) { 1615 dlclose(handle); 1616 return 1; 1617 } 1618 1619 while (map->l_prev != NULL) { 1620 map = map->l_prev; 1621 } 1622 1623 while (map != NULL) { 1624 // Iterate through all map entries and call callback with fields of interest 1625 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) { 1626 dlclose(handle); 1627 return 1; 1628 } 1629 map = map->l_next; 1630 } 1631 1632 dlclose(handle); 1633 return 0; 1634} 1635 1636int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) { 1637 outputStream * out = (outputStream *) param; 1638 out->print_cr(PTR_FORMAT " \t%s", base_address, name); 1639 return 0; 1640} 1641 1642void os::print_dll_info(outputStream * st) { 1643 st->print_cr("Dynamic libraries:"); st->flush(); 1644 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) { 1645 st->print_cr("Error: Cannot print dynamic libraries."); 1646 } 1647} 1648 1649// Loads .dll/.so and 1650// in case of error it checks if .dll/.so was built for the 1651// same architecture as Hotspot is running on 1652 1653void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { 1654 void * result= ::dlopen(filename, RTLD_LAZY); 1655 if (result != NULL) { 1656 // Successful loading 1657 return result; 1658 } 1659 1660 Elf32_Ehdr elf_head; 1661 1662 // Read system error message into ebuf 1663 // It may or may not be overwritten below 1664 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1665 ebuf[ebuflen-1]='\0'; 1666 int diag_msg_max_length=ebuflen-strlen(ebuf); 1667 char* diag_msg_buf=ebuf+strlen(ebuf); 1668 1669 if (diag_msg_max_length==0) { 1670 // No more space in ebuf for additional diagnostics message 1671 return NULL; 1672 } 1673 1674 1675 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1676 1677 if (file_descriptor < 0) { 1678 // Can't open library, report dlerror() message 1679 return NULL; 1680 } 1681 1682 bool failed_to_read_elf_head= 1683 (sizeof(elf_head)!= 1684 (::read(file_descriptor, &elf_head,sizeof(elf_head)))); 1685 1686 ::close(file_descriptor); 1687 if (failed_to_read_elf_head) { 1688 // file i/o error - report dlerror() msg 1689 return NULL; 1690 } 1691 1692 typedef struct { 1693 Elf32_Half code; // Actual value as defined in elf.h 1694 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1695 char elf_class; // 32 or 64 bit 1696 char endianess; // MSB or LSB 1697 char* name; // String representation 1698 } arch_t; 1699 1700 static const arch_t arch_array[]={ 1701 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1702 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1703 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1704 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1705 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1706 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1707 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1708 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1709 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 1710 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 1711 }; 1712 1713#if (defined IA32) 1714 static Elf32_Half running_arch_code=EM_386; 1715#elif (defined AMD64) 1716 static Elf32_Half running_arch_code=EM_X86_64; 1717#elif (defined IA64) 1718 static Elf32_Half running_arch_code=EM_IA_64; 1719#elif (defined __sparc) && (defined _LP64) 1720 static Elf32_Half running_arch_code=EM_SPARCV9; 1721#elif (defined __sparc) && (!defined _LP64) 1722 static Elf32_Half running_arch_code=EM_SPARC; 1723#elif (defined __powerpc64__) 1724 static Elf32_Half running_arch_code=EM_PPC64; 1725#elif (defined __powerpc__) 1726 static Elf32_Half running_arch_code=EM_PPC; 1727#elif (defined ARM) 1728 static Elf32_Half running_arch_code=EM_ARM; 1729#else 1730 #error Method os::dll_load requires that one of following is defined:\ 1731 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 1732#endif 1733 1734 // Identify compatability class for VM's architecture and library's architecture 1735 // Obtain string descriptions for architectures 1736 1737 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1738 int running_arch_index=-1; 1739 1740 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) { 1741 if (running_arch_code == arch_array[i].code) { 1742 running_arch_index = i; 1743 } 1744 if (lib_arch.code == arch_array[i].code) { 1745 lib_arch.compat_class = arch_array[i].compat_class; 1746 lib_arch.name = arch_array[i].name; 1747 } 1748 } 1749 1750 assert(running_arch_index != -1, 1751 "Didn't find running architecture code (running_arch_code) in arch_array"); 1752 if (running_arch_index == -1) { 1753 // Even though running architecture detection failed 1754 // we may still continue with reporting dlerror() message 1755 return NULL; 1756 } 1757 1758 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 1759 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 1760 return NULL; 1761 } 1762 1763 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 1764 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 1765 return NULL; 1766 } 1767 1768 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 1769 if (lib_arch.name!=NULL) { 1770 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1771 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 1772 lib_arch.name, arch_array[running_arch_index].name); 1773 } else { 1774 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1775 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 1776 lib_arch.code, 1777 arch_array[running_arch_index].name); 1778 } 1779 } 1780 1781 return NULL; 1782} 1783 1784void* os::dll_lookup(void* handle, const char* name) { 1785 return dlsym(handle, name); 1786} 1787 1788void* os::get_default_process_handle() { 1789 return (void*)::dlopen(NULL, RTLD_LAZY); 1790} 1791 1792int os::stat(const char *path, struct stat *sbuf) { 1793 char pathbuf[MAX_PATH]; 1794 if (strlen(path) > MAX_PATH - 1) { 1795 errno = ENAMETOOLONG; 1796 return -1; 1797 } 1798 os::native_path(strcpy(pathbuf, path)); 1799 return ::stat(pathbuf, sbuf); 1800} 1801 1802static inline time_t get_mtime(const char* filename) { 1803 struct stat st; 1804 int ret = os::stat(filename, &st); 1805 assert(ret == 0, "failed to stat() file '%s': %s", filename, strerror(errno)); 1806 return st.st_mtime; 1807} 1808 1809int os::compare_file_modified_times(const char* file1, const char* file2) { 1810 time_t t1 = get_mtime(file1); 1811 time_t t2 = get_mtime(file2); 1812 return t1 - t2; 1813} 1814 1815static bool _print_ascii_file(const char* filename, outputStream* st) { 1816 int fd = ::open(filename, O_RDONLY); 1817 if (fd == -1) { 1818 return false; 1819 } 1820 1821 char buf[32]; 1822 int bytes; 1823 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 1824 st->print_raw(buf, bytes); 1825 } 1826 1827 ::close(fd); 1828 1829 return true; 1830} 1831 1832void os::print_os_info_brief(outputStream* st) { 1833 os::Solaris::print_distro_info(st); 1834 1835 os::Posix::print_uname_info(st); 1836 1837 os::Solaris::print_libversion_info(st); 1838} 1839 1840void os::print_os_info(outputStream* st) { 1841 st->print("OS:"); 1842 1843 os::Solaris::print_distro_info(st); 1844 1845 os::Posix::print_uname_info(st); 1846 1847 os::Solaris::print_libversion_info(st); 1848 1849 os::Posix::print_rlimit_info(st); 1850 1851 os::Posix::print_load_average(st); 1852} 1853 1854void os::Solaris::print_distro_info(outputStream* st) { 1855 if (!_print_ascii_file("/etc/release", st)) { 1856 st->print("Solaris"); 1857 } 1858 st->cr(); 1859} 1860 1861void os::get_summary_os_info(char* buf, size_t buflen) { 1862 strncpy(buf, "Solaris", buflen); // default to plain solaris 1863 FILE* fp = fopen("/etc/release", "r"); 1864 if (fp != NULL) { 1865 char tmp[256]; 1866 // Only get the first line and chop out everything but the os name. 1867 if (fgets(tmp, sizeof(tmp), fp)) { 1868 char* ptr = tmp; 1869 // skip past whitespace characters 1870 while (*ptr != '\0' && (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')) ptr++; 1871 if (*ptr != '\0') { 1872 char* nl = strchr(ptr, '\n'); 1873 if (nl != NULL) *nl = '\0'; 1874 strncpy(buf, ptr, buflen); 1875 } 1876 } 1877 fclose(fp); 1878 } 1879} 1880 1881void os::Solaris::print_libversion_info(outputStream* st) { 1882 st->print(" (T2 libthread)"); 1883 st->cr(); 1884} 1885 1886static bool check_addr0(outputStream* st) { 1887 jboolean status = false; 1888 const int read_chunk = 200; 1889 int ret = 0; 1890 int nmap = 0; 1891 int fd = ::open("/proc/self/map",O_RDONLY); 1892 if (fd >= 0) { 1893 prmap_t *p = NULL; 1894 char *mbuff = (char *) calloc(read_chunk, sizeof(prmap_t)); 1895 if (NULL == mbuff) { 1896 ::close(fd); 1897 return status; 1898 } 1899 while ((ret = ::read(fd, mbuff, read_chunk*sizeof(prmap_t))) > 0) { 1900 //check if read() has not read partial data 1901 if( 0 != ret % sizeof(prmap_t)){ 1902 break; 1903 } 1904 nmap = ret / sizeof(prmap_t); 1905 p = (prmap_t *)mbuff; 1906 for(int i = 0; i < nmap; i++){ 1907 if (p->pr_vaddr == 0x0) { 1908 st->print("Warning: Address: " PTR_FORMAT ", Size: " SIZE_FORMAT "K, ",p->pr_vaddr, p->pr_size/1024); 1909 st->print("Mapped file: %s, ", p->pr_mapname[0] == '\0' ? "None" : p->pr_mapname); 1910 st->print("Access: "); 1911 st->print("%s",(p->pr_mflags & MA_READ) ? "r" : "-"); 1912 st->print("%s",(p->pr_mflags & MA_WRITE) ? "w" : "-"); 1913 st->print("%s",(p->pr_mflags & MA_EXEC) ? "x" : "-"); 1914 st->cr(); 1915 status = true; 1916 } 1917 p++; 1918 } 1919 } 1920 free(mbuff); 1921 ::close(fd); 1922 } 1923 return status; 1924} 1925 1926void os::get_summary_cpu_info(char* buf, size_t buflen) { 1927 // Get MHz with system call. We don't seem to already have this. 1928 processor_info_t stats; 1929 processorid_t id = getcpuid(); 1930 int clock = 0; 1931 if (processor_info(id, &stats) != -1) { 1932 clock = stats.pi_clock; // pi_processor_type isn't more informative than below 1933 } 1934#ifdef AMD64 1935 snprintf(buf, buflen, "x86 64 bit %d MHz", clock); 1936#else 1937 // must be sparc 1938 snprintf(buf, buflen, "Sparcv9 64 bit %d MHz", clock); 1939#endif 1940} 1941 1942void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) { 1943 // Nothing to do for now. 1944} 1945 1946void os::print_memory_info(outputStream* st) { 1947 st->print("Memory:"); 1948 st->print(" %dk page", os::vm_page_size()>>10); 1949 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 1950 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 1951 st->cr(); 1952 (void) check_addr0(st); 1953} 1954 1955// Moved from whole group, because we need them here for diagnostic 1956// prints. 1957#define OLDMAXSIGNUM 32 1958static int Maxsignum = 0; 1959static int *ourSigFlags = NULL; 1960 1961int os::Solaris::get_our_sigflags(int sig) { 1962 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1963 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1964 return ourSigFlags[sig]; 1965} 1966 1967void os::Solaris::set_our_sigflags(int sig, int flags) { 1968 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1969 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1970 ourSigFlags[sig] = flags; 1971} 1972 1973 1974static const char* get_signal_handler_name(address handler, 1975 char* buf, int buflen) { 1976 int offset; 1977 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 1978 if (found) { 1979 // skip directory names 1980 const char *p1, *p2; 1981 p1 = buf; 1982 size_t len = strlen(os::file_separator()); 1983 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 1984 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 1985 } else { 1986 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 1987 } 1988 return buf; 1989} 1990 1991static void print_signal_handler(outputStream* st, int sig, 1992 char* buf, size_t buflen) { 1993 struct sigaction sa; 1994 1995 sigaction(sig, NULL, &sa); 1996 1997 st->print("%s: ", os::exception_name(sig, buf, buflen)); 1998 1999 address handler = (sa.sa_flags & SA_SIGINFO) 2000 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2001 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2002 2003 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2004 st->print("SIG_DFL"); 2005 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2006 st->print("SIG_IGN"); 2007 } else { 2008 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2009 } 2010 2011 st->print(", sa_mask[0]="); 2012 os::Posix::print_signal_set_short(st, &sa.sa_mask); 2013 2014 address rh = VMError::get_resetted_sighandler(sig); 2015 // May be, handler was resetted by VMError? 2016 if (rh != NULL) { 2017 handler = rh; 2018 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2019 } 2020 2021 st->print(", sa_flags="); 2022 os::Posix::print_sa_flags(st, sa.sa_flags); 2023 2024 // Check: is it our handler? 2025 if (handler == CAST_FROM_FN_PTR(address, signalHandler)) { 2026 // It is our signal handler 2027 // check for flags 2028 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2029 st->print( 2030 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2031 os::Solaris::get_our_sigflags(sig)); 2032 } 2033 } 2034 st->cr(); 2035} 2036 2037void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2038 st->print_cr("Signal Handlers:"); 2039 print_signal_handler(st, SIGSEGV, buf, buflen); 2040 print_signal_handler(st, SIGBUS , buf, buflen); 2041 print_signal_handler(st, SIGFPE , buf, buflen); 2042 print_signal_handler(st, SIGPIPE, buf, buflen); 2043 print_signal_handler(st, SIGXFSZ, buf, buflen); 2044 print_signal_handler(st, SIGILL , buf, buflen); 2045 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2046 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2047 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2048 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2049 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2050 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2051} 2052 2053static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2054 2055// Find the full path to the current module, libjvm.so 2056void os::jvm_path(char *buf, jint buflen) { 2057 // Error checking. 2058 if (buflen < MAXPATHLEN) { 2059 assert(false, "must use a large-enough buffer"); 2060 buf[0] = '\0'; 2061 return; 2062 } 2063 // Lazy resolve the path to current module. 2064 if (saved_jvm_path[0] != 0) { 2065 strcpy(buf, saved_jvm_path); 2066 return; 2067 } 2068 2069 Dl_info dlinfo; 2070 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2071 assert(ret != 0, "cannot locate libjvm"); 2072 if (ret != 0 && dlinfo.dli_fname != NULL) { 2073 realpath((char *)dlinfo.dli_fname, buf); 2074 } else { 2075 buf[0] = '\0'; 2076 return; 2077 } 2078 2079 if (Arguments::sun_java_launcher_is_altjvm()) { 2080 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical 2081 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". 2082 // If "/jre/lib/" appears at the right place in the string, then 2083 // assume we are installed in a JDK and we're done. Otherwise, check 2084 // for a JAVA_HOME environment variable and fix up the path so it 2085 // looks like libjvm.so is installed there (append a fake suffix 2086 // hotspot/libjvm.so). 2087 const char *p = buf + strlen(buf) - 1; 2088 for (int count = 0; p > buf && count < 5; ++count) { 2089 for (--p; p > buf && *p != '/'; --p) 2090 /* empty */ ; 2091 } 2092 2093 if (strncmp(p, "/jre/lib/", 9) != 0) { 2094 // Look for JAVA_HOME in the environment. 2095 char* java_home_var = ::getenv("JAVA_HOME"); 2096 if (java_home_var != NULL && java_home_var[0] != 0) { 2097 char cpu_arch[12]; 2098 char* jrelib_p; 2099 int len; 2100 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2101#ifdef _LP64 2102 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2103 if (strcmp(cpu_arch, "sparc") == 0) { 2104 strcat(cpu_arch, "v9"); 2105 } else if (strcmp(cpu_arch, "i386") == 0) { 2106 strcpy(cpu_arch, "amd64"); 2107 } 2108#endif 2109 // Check the current module name "libjvm.so". 2110 p = strrchr(buf, '/'); 2111 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2112 2113 realpath(java_home_var, buf); 2114 // determine if this is a legacy image or modules image 2115 // modules image doesn't have "jre" subdirectory 2116 len = strlen(buf); 2117 assert(len < buflen, "Ran out of buffer space"); 2118 jrelib_p = buf + len; 2119 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2120 if (0 != access(buf, F_OK)) { 2121 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2122 } 2123 2124 if (0 == access(buf, F_OK)) { 2125 // Use current module name "libjvm.so" 2126 len = strlen(buf); 2127 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2128 } else { 2129 // Go back to path of .so 2130 realpath((char *)dlinfo.dli_fname, buf); 2131 } 2132 } 2133 } 2134 } 2135 2136 strncpy(saved_jvm_path, buf, MAXPATHLEN); 2137 saved_jvm_path[MAXPATHLEN - 1] = '\0'; 2138} 2139 2140 2141void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2142 // no prefix required, not even "_" 2143} 2144 2145 2146void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2147 // no suffix required 2148} 2149 2150// This method is a copy of JDK's sysGetLastErrorString 2151// from src/solaris/hpi/src/system_md.c 2152 2153size_t os::lasterror(char *buf, size_t len) { 2154 if (errno == 0) return 0; 2155 2156 const char *s = os::strerror(errno); 2157 size_t n = ::strlen(s); 2158 if (n >= len) { 2159 n = len - 1; 2160 } 2161 ::strncpy(buf, s, n); 2162 buf[n] = '\0'; 2163 return n; 2164} 2165 2166 2167// sun.misc.Signal 2168 2169extern "C" { 2170 static void UserHandler(int sig, void *siginfo, void *context) { 2171 // Ctrl-C is pressed during error reporting, likely because the error 2172 // handler fails to abort. Let VM die immediately. 2173 if (sig == SIGINT && is_error_reported()) { 2174 os::die(); 2175 } 2176 2177 os::signal_notify(sig); 2178 // We do not need to reinstate the signal handler each time... 2179 } 2180} 2181 2182void* os::user_handler() { 2183 return CAST_FROM_FN_PTR(void*, UserHandler); 2184} 2185 2186struct timespec PosixSemaphore::create_timespec(unsigned int sec, int nsec) { 2187 struct timespec ts; 2188 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2189 2190 return ts; 2191} 2192 2193extern "C" { 2194 typedef void (*sa_handler_t)(int); 2195 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2196} 2197 2198void* os::signal(int signal_number, void* handler) { 2199 struct sigaction sigAct, oldSigAct; 2200 sigfillset(&(sigAct.sa_mask)); 2201 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2202 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2203 2204 if (sigaction(signal_number, &sigAct, &oldSigAct)) { 2205 // -1 means registration failed 2206 return (void *)-1; 2207 } 2208 2209 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2210} 2211 2212void os::signal_raise(int signal_number) { 2213 raise(signal_number); 2214} 2215 2216// The following code is moved from os.cpp for making this 2217// code platform specific, which it is by its very nature. 2218 2219// a counter for each possible signal value 2220static int Sigexit = 0; 2221static int Maxlibjsigsigs; 2222static jint *pending_signals = NULL; 2223static int *preinstalled_sigs = NULL; 2224static struct sigaction *chainedsigactions = NULL; 2225static sema_t sig_sem; 2226typedef int (*version_getting_t)(); 2227version_getting_t os::Solaris::get_libjsig_version = NULL; 2228static int libjsigversion = NULL; 2229 2230int os::sigexitnum_pd() { 2231 assert(Sigexit > 0, "signal memory not yet initialized"); 2232 return Sigexit; 2233} 2234 2235void os::Solaris::init_signal_mem() { 2236 // Initialize signal structures 2237 Maxsignum = SIGRTMAX; 2238 Sigexit = Maxsignum+1; 2239 assert(Maxsignum >0, "Unable to obtain max signal number"); 2240 2241 Maxlibjsigsigs = Maxsignum; 2242 2243 // pending_signals has one int per signal 2244 // The additional signal is for SIGEXIT - exit signal to signal_thread 2245 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2246 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2247 2248 if (UseSignalChaining) { 2249 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2250 * (Maxsignum + 1), mtInternal); 2251 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2252 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2253 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2254 } 2255 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2256 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2257} 2258 2259void os::signal_init_pd() { 2260 int ret; 2261 2262 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2263 assert(ret == 0, "sema_init() failed"); 2264} 2265 2266void os::signal_notify(int signal_number) { 2267 int ret; 2268 2269 Atomic::inc(&pending_signals[signal_number]); 2270 ret = ::sema_post(&sig_sem); 2271 assert(ret == 0, "sema_post() failed"); 2272} 2273 2274static int check_pending_signals(bool wait_for_signal) { 2275 int ret; 2276 while (true) { 2277 for (int i = 0; i < Sigexit + 1; i++) { 2278 jint n = pending_signals[i]; 2279 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2280 return i; 2281 } 2282 } 2283 if (!wait_for_signal) { 2284 return -1; 2285 } 2286 JavaThread *thread = JavaThread::current(); 2287 ThreadBlockInVM tbivm(thread); 2288 2289 bool threadIsSuspended; 2290 do { 2291 thread->set_suspend_equivalent(); 2292 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2293 while ((ret = ::sema_wait(&sig_sem)) == EINTR) 2294 ; 2295 assert(ret == 0, "sema_wait() failed"); 2296 2297 // were we externally suspended while we were waiting? 2298 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2299 if (threadIsSuspended) { 2300 // The semaphore has been incremented, but while we were waiting 2301 // another thread suspended us. We don't want to continue running 2302 // while suspended because that would surprise the thread that 2303 // suspended us. 2304 ret = ::sema_post(&sig_sem); 2305 assert(ret == 0, "sema_post() failed"); 2306 2307 thread->java_suspend_self(); 2308 } 2309 } while (threadIsSuspended); 2310 } 2311} 2312 2313int os::signal_lookup() { 2314 return check_pending_signals(false); 2315} 2316 2317int os::signal_wait() { 2318 return check_pending_signals(true); 2319} 2320 2321//////////////////////////////////////////////////////////////////////////////// 2322// Virtual Memory 2323 2324static int page_size = -1; 2325 2326// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2327// clear this var if support is not available. 2328static bool has_map_align = true; 2329 2330int os::vm_page_size() { 2331 assert(page_size != -1, "must call os::init"); 2332 return page_size; 2333} 2334 2335// Solaris allocates memory by pages. 2336int os::vm_allocation_granularity() { 2337 assert(page_size != -1, "must call os::init"); 2338 return page_size; 2339} 2340 2341static bool recoverable_mmap_error(int err) { 2342 // See if the error is one we can let the caller handle. This 2343 // list of errno values comes from the Solaris mmap(2) man page. 2344 switch (err) { 2345 case EBADF: 2346 case EINVAL: 2347 case ENOTSUP: 2348 // let the caller deal with these errors 2349 return true; 2350 2351 default: 2352 // Any remaining errors on this OS can cause our reserved mapping 2353 // to be lost. That can cause confusion where different data 2354 // structures think they have the same memory mapped. The worst 2355 // scenario is if both the VM and a library think they have the 2356 // same memory mapped. 2357 return false; 2358 } 2359} 2360 2361static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2362 int err) { 2363 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2364 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2365 os::strerror(err), err); 2366} 2367 2368static void warn_fail_commit_memory(char* addr, size_t bytes, 2369 size_t alignment_hint, bool exec, 2370 int err) { 2371 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2372 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2373 alignment_hint, exec, os::strerror(err), err); 2374} 2375 2376int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2377 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2378 size_t size = bytes; 2379 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2380 if (res != NULL) { 2381 if (UseNUMAInterleaving) { 2382 numa_make_global(addr, bytes); 2383 } 2384 return 0; 2385 } 2386 2387 int err = errno; // save errno from mmap() call in mmap_chunk() 2388 2389 if (!recoverable_mmap_error(err)) { 2390 warn_fail_commit_memory(addr, bytes, exec, err); 2391 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2392 } 2393 2394 return err; 2395} 2396 2397bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2398 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2399} 2400 2401void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2402 const char* mesg) { 2403 assert(mesg != NULL, "mesg must be specified"); 2404 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2405 if (err != 0) { 2406 // the caller wants all commit errors to exit with the specified mesg: 2407 warn_fail_commit_memory(addr, bytes, exec, err); 2408 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2409 } 2410} 2411 2412size_t os::Solaris::page_size_for_alignment(size_t alignment) { 2413 assert(is_size_aligned(alignment, (size_t) vm_page_size()), 2414 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, 2415 alignment, (size_t) vm_page_size()); 2416 2417 for (int i = 0; _page_sizes[i] != 0; i++) { 2418 if (is_size_aligned(alignment, _page_sizes[i])) { 2419 return _page_sizes[i]; 2420 } 2421 } 2422 2423 return (size_t) vm_page_size(); 2424} 2425 2426int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2427 size_t alignment_hint, bool exec) { 2428 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2429 if (err == 0 && UseLargePages && alignment_hint > 0) { 2430 assert(is_size_aligned(bytes, alignment_hint), 2431 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint); 2432 2433 // The syscall memcntl requires an exact page size (see man memcntl for details). 2434 size_t page_size = page_size_for_alignment(alignment_hint); 2435 if (page_size > (size_t) vm_page_size()) { 2436 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2437 } 2438 } 2439 return err; 2440} 2441 2442bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2443 bool exec) { 2444 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2445} 2446 2447void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2448 size_t alignment_hint, bool exec, 2449 const char* mesg) { 2450 assert(mesg != NULL, "mesg must be specified"); 2451 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2452 if (err != 0) { 2453 // the caller wants all commit errors to exit with the specified mesg: 2454 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2455 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2456 } 2457} 2458 2459// Uncommit the pages in a specified region. 2460void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2461 if (madvise(addr, bytes, MADV_FREE) < 0) { 2462 debug_only(warning("MADV_FREE failed.")); 2463 return; 2464 } 2465} 2466 2467bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2468 return os::commit_memory(addr, size, !ExecMem); 2469} 2470 2471bool os::remove_stack_guard_pages(char* addr, size_t size) { 2472 return os::uncommit_memory(addr, size); 2473} 2474 2475// Change the page size in a given range. 2476void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2477 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2478 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2479 if (UseLargePages) { 2480 size_t page_size = Solaris::page_size_for_alignment(alignment_hint); 2481 if (page_size > (size_t) vm_page_size()) { 2482 Solaris::setup_large_pages(addr, bytes, page_size); 2483 } 2484 } 2485} 2486 2487// Tell the OS to make the range local to the first-touching LWP 2488void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2489 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2490 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2491 debug_only(warning("MADV_ACCESS_LWP failed.")); 2492 } 2493} 2494 2495// Tell the OS that this range would be accessed from different LWPs. 2496void os::numa_make_global(char *addr, size_t bytes) { 2497 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2498 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2499 debug_only(warning("MADV_ACCESS_MANY failed.")); 2500 } 2501} 2502 2503// Get the number of the locality groups. 2504size_t os::numa_get_groups_num() { 2505 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2506 return n != -1 ? n : 1; 2507} 2508 2509// Get a list of leaf locality groups. A leaf lgroup is group that 2510// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2511// board. An LWP is assigned to one of these groups upon creation. 2512size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2513 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2514 ids[0] = 0; 2515 return 1; 2516 } 2517 int result_size = 0, top = 1, bottom = 0, cur = 0; 2518 for (int k = 0; k < size; k++) { 2519 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2520 (Solaris::lgrp_id_t*)&ids[top], size - top); 2521 if (r == -1) { 2522 ids[0] = 0; 2523 return 1; 2524 } 2525 if (!r) { 2526 // That's a leaf node. 2527 assert(bottom <= cur, "Sanity check"); 2528 // Check if the node has memory 2529 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2530 NULL, 0, LGRP_RSRC_MEM) > 0) { 2531 ids[bottom++] = ids[cur]; 2532 } 2533 } 2534 top += r; 2535 cur++; 2536 } 2537 if (bottom == 0) { 2538 // Handle a situation, when the OS reports no memory available. 2539 // Assume UMA architecture. 2540 ids[0] = 0; 2541 return 1; 2542 } 2543 return bottom; 2544} 2545 2546// Detect the topology change. Typically happens during CPU plugging-unplugging. 2547bool os::numa_topology_changed() { 2548 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2549 if (is_stale != -1 && is_stale) { 2550 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2551 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2552 assert(c != 0, "Failure to initialize LGRP API"); 2553 Solaris::set_lgrp_cookie(c); 2554 return true; 2555 } 2556 return false; 2557} 2558 2559// Get the group id of the current LWP. 2560int os::numa_get_group_id() { 2561 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2562 if (lgrp_id == -1) { 2563 return 0; 2564 } 2565 const int size = os::numa_get_groups_num(); 2566 int *ids = (int*)alloca(size * sizeof(int)); 2567 2568 // Get the ids of all lgroups with memory; r is the count. 2569 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2570 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2571 if (r <= 0) { 2572 return 0; 2573 } 2574 return ids[os::random() % r]; 2575} 2576 2577// Request information about the page. 2578bool os::get_page_info(char *start, page_info* info) { 2579 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2580 uint64_t addr = (uintptr_t)start; 2581 uint64_t outdata[2]; 2582 uint_t validity = 0; 2583 2584 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2585 return false; 2586 } 2587 2588 info->size = 0; 2589 info->lgrp_id = -1; 2590 2591 if ((validity & 1) != 0) { 2592 if ((validity & 2) != 0) { 2593 info->lgrp_id = outdata[0]; 2594 } 2595 if ((validity & 4) != 0) { 2596 info->size = outdata[1]; 2597 } 2598 return true; 2599 } 2600 return false; 2601} 2602 2603// Scan the pages from start to end until a page different than 2604// the one described in the info parameter is encountered. 2605char *os::scan_pages(char *start, char* end, page_info* page_expected, 2606 page_info* page_found) { 2607 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2608 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2609 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1]; 2610 uint_t validity[MAX_MEMINFO_CNT]; 2611 2612 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2613 uint64_t p = (uint64_t)start; 2614 while (p < (uint64_t)end) { 2615 addrs[0] = p; 2616 size_t addrs_count = 1; 2617 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2618 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2619 addrs_count++; 2620 } 2621 2622 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2623 return NULL; 2624 } 2625 2626 size_t i = 0; 2627 for (; i < addrs_count; i++) { 2628 if ((validity[i] & 1) != 0) { 2629 if ((validity[i] & 4) != 0) { 2630 if (outdata[types * i + 1] != page_expected->size) { 2631 break; 2632 } 2633 } else if (page_expected->size != 0) { 2634 break; 2635 } 2636 2637 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2638 if (outdata[types * i] != page_expected->lgrp_id) { 2639 break; 2640 } 2641 } 2642 } else { 2643 return NULL; 2644 } 2645 } 2646 2647 if (i < addrs_count) { 2648 if ((validity[i] & 2) != 0) { 2649 page_found->lgrp_id = outdata[types * i]; 2650 } else { 2651 page_found->lgrp_id = -1; 2652 } 2653 if ((validity[i] & 4) != 0) { 2654 page_found->size = outdata[types * i + 1]; 2655 } else { 2656 page_found->size = 0; 2657 } 2658 return (char*)addrs[i]; 2659 } 2660 2661 p = addrs[addrs_count - 1] + page_size; 2662 } 2663 return end; 2664} 2665 2666bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2667 size_t size = bytes; 2668 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2669 // uncommitted page. Otherwise, the read/write might succeed if we 2670 // have enough swap space to back the physical page. 2671 return 2672 NULL != Solaris::mmap_chunk(addr, size, 2673 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2674 PROT_NONE); 2675} 2676 2677char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2678 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2679 2680 if (b == MAP_FAILED) { 2681 return NULL; 2682 } 2683 return b; 2684} 2685 2686char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, 2687 size_t alignment_hint, bool fixed) { 2688 char* addr = requested_addr; 2689 int flags = MAP_PRIVATE | MAP_NORESERVE; 2690 2691 assert(!(fixed && (alignment_hint > 0)), 2692 "alignment hint meaningless with fixed mmap"); 2693 2694 if (fixed) { 2695 flags |= MAP_FIXED; 2696 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2697 flags |= MAP_ALIGN; 2698 addr = (char*) alignment_hint; 2699 } 2700 2701 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2702 // uncommitted page. Otherwise, the read/write might succeed if we 2703 // have enough swap space to back the physical page. 2704 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2705} 2706 2707char* os::pd_reserve_memory(size_t bytes, char* requested_addr, 2708 size_t alignment_hint) { 2709 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, 2710 (requested_addr != NULL)); 2711 2712 guarantee(requested_addr == NULL || requested_addr == addr, 2713 "OS failed to return requested mmap address."); 2714 return addr; 2715} 2716 2717// Reserve memory at an arbitrary address, only if that area is 2718// available (and not reserved for something else). 2719 2720char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2721 const int max_tries = 10; 2722 char* base[max_tries]; 2723 size_t size[max_tries]; 2724 2725 // Solaris adds a gap between mmap'ed regions. The size of the gap 2726 // is dependent on the requested size and the MMU. Our initial gap 2727 // value here is just a guess and will be corrected later. 2728 bool had_top_overlap = false; 2729 bool have_adjusted_gap = false; 2730 size_t gap = 0x400000; 2731 2732 // Assert only that the size is a multiple of the page size, since 2733 // that's all that mmap requires, and since that's all we really know 2734 // about at this low abstraction level. If we need higher alignment, 2735 // we can either pass an alignment to this method or verify alignment 2736 // in one of the methods further up the call chain. See bug 5044738. 2737 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2738 2739 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2740 // Give it a try, if the kernel honors the hint we can return immediately. 2741 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2742 2743 volatile int err = errno; 2744 if (addr == requested_addr) { 2745 return addr; 2746 } else if (addr != NULL) { 2747 pd_unmap_memory(addr, bytes); 2748 } 2749 2750 if (log_is_enabled(Warning, os)) { 2751 char buf[256]; 2752 buf[0] = '\0'; 2753 if (addr == NULL) { 2754 jio_snprintf(buf, sizeof(buf), ": %s", os::strerror(err)); 2755 } 2756 log_info(os)("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 2757 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2758 "%s", bytes, requested_addr, addr, buf); 2759 } 2760 2761 // Address hint method didn't work. Fall back to the old method. 2762 // In theory, once SNV becomes our oldest supported platform, this 2763 // code will no longer be needed. 2764 // 2765 // Repeatedly allocate blocks until the block is allocated at the 2766 // right spot. Give up after max_tries. 2767 int i; 2768 for (i = 0; i < max_tries; ++i) { 2769 base[i] = reserve_memory(bytes); 2770 2771 if (base[i] != NULL) { 2772 // Is this the block we wanted? 2773 if (base[i] == requested_addr) { 2774 size[i] = bytes; 2775 break; 2776 } 2777 2778 // check that the gap value is right 2779 if (had_top_overlap && !have_adjusted_gap) { 2780 size_t actual_gap = base[i-1] - base[i] - bytes; 2781 if (gap != actual_gap) { 2782 // adjust the gap value and retry the last 2 allocations 2783 assert(i > 0, "gap adjustment code problem"); 2784 have_adjusted_gap = true; // adjust the gap only once, just in case 2785 gap = actual_gap; 2786 log_info(os)("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2787 unmap_memory(base[i], bytes); 2788 unmap_memory(base[i-1], size[i-1]); 2789 i-=2; 2790 continue; 2791 } 2792 } 2793 2794 // Does this overlap the block we wanted? Give back the overlapped 2795 // parts and try again. 2796 // 2797 // There is still a bug in this code: if top_overlap == bytes, 2798 // the overlap is offset from requested region by the value of gap. 2799 // In this case giving back the overlapped part will not work, 2800 // because we'll give back the entire block at base[i] and 2801 // therefore the subsequent allocation will not generate a new gap. 2802 // This could be fixed with a new algorithm that used larger 2803 // or variable size chunks to find the requested region - 2804 // but such a change would introduce additional complications. 2805 // It's rare enough that the planets align for this bug, 2806 // so we'll just wait for a fix for 6204603/5003415 which 2807 // will provide a mmap flag to allow us to avoid this business. 2808 2809 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2810 if (top_overlap >= 0 && top_overlap < bytes) { 2811 had_top_overlap = true; 2812 unmap_memory(base[i], top_overlap); 2813 base[i] += top_overlap; 2814 size[i] = bytes - top_overlap; 2815 } else { 2816 size_t bottom_overlap = base[i] + bytes - requested_addr; 2817 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2818 if (bottom_overlap == 0) { 2819 log_info(os)("attempt_reserve_memory_at: possible alignment bug"); 2820 } 2821 unmap_memory(requested_addr, bottom_overlap); 2822 size[i] = bytes - bottom_overlap; 2823 } else { 2824 size[i] = bytes; 2825 } 2826 } 2827 } 2828 } 2829 2830 // Give back the unused reserved pieces. 2831 2832 for (int j = 0; j < i; ++j) { 2833 if (base[j] != NULL) { 2834 unmap_memory(base[j], size[j]); 2835 } 2836 } 2837 2838 return (i < max_tries) ? requested_addr : NULL; 2839} 2840 2841bool os::pd_release_memory(char* addr, size_t bytes) { 2842 size_t size = bytes; 2843 return munmap(addr, size) == 0; 2844} 2845 2846static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2847 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2848 "addr must be page aligned"); 2849 int retVal = mprotect(addr, bytes, prot); 2850 return retVal == 0; 2851} 2852 2853// Protect memory (Used to pass readonly pages through 2854// JNI GetArray<type>Elements with empty arrays.) 2855// Also, used for serialization page and for compressed oops null pointer 2856// checking. 2857bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2858 bool is_committed) { 2859 unsigned int p = 0; 2860 switch (prot) { 2861 case MEM_PROT_NONE: p = PROT_NONE; break; 2862 case MEM_PROT_READ: p = PROT_READ; break; 2863 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2864 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2865 default: 2866 ShouldNotReachHere(); 2867 } 2868 // is_committed is unused. 2869 return solaris_mprotect(addr, bytes, p); 2870} 2871 2872// guard_memory and unguard_memory only happens within stack guard pages. 2873// Since ISM pertains only to the heap, guard and unguard memory should not 2874/// happen with an ISM region. 2875bool os::guard_memory(char* addr, size_t bytes) { 2876 return solaris_mprotect(addr, bytes, PROT_NONE); 2877} 2878 2879bool os::unguard_memory(char* addr, size_t bytes) { 2880 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 2881} 2882 2883// Large page support 2884static size_t _large_page_size = 0; 2885 2886// Insertion sort for small arrays (descending order). 2887static void insertion_sort_descending(size_t* array, int len) { 2888 for (int i = 0; i < len; i++) { 2889 size_t val = array[i]; 2890 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 2891 size_t tmp = array[key]; 2892 array[key] = array[key - 1]; 2893 array[key - 1] = tmp; 2894 } 2895 } 2896} 2897 2898bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 2899 const unsigned int usable_count = VM_Version::page_size_count(); 2900 if (usable_count == 1) { 2901 return false; 2902 } 2903 2904 // Find the right getpagesizes interface. When solaris 11 is the minimum 2905 // build platform, getpagesizes() (without the '2') can be called directly. 2906 typedef int (*gps_t)(size_t[], int); 2907 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 2908 if (gps_func == NULL) { 2909 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 2910 if (gps_func == NULL) { 2911 if (warn) { 2912 warning("MPSS is not supported by the operating system."); 2913 } 2914 return false; 2915 } 2916 } 2917 2918 // Fill the array of page sizes. 2919 int n = (*gps_func)(_page_sizes, page_sizes_max); 2920 assert(n > 0, "Solaris bug?"); 2921 2922 if (n == page_sizes_max) { 2923 // Add a sentinel value (necessary only if the array was completely filled 2924 // since it is static (zeroed at initialization)). 2925 _page_sizes[--n] = 0; 2926 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 2927 } 2928 assert(_page_sizes[n] == 0, "missing sentinel"); 2929 trace_page_sizes("available page sizes", _page_sizes, n); 2930 2931 if (n == 1) return false; // Only one page size available. 2932 2933 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 2934 // select up to usable_count elements. First sort the array, find the first 2935 // acceptable value, then copy the usable sizes to the top of the array and 2936 // trim the rest. Make sure to include the default page size :-). 2937 // 2938 // A better policy could get rid of the 4M limit by taking the sizes of the 2939 // important VM memory regions (java heap and possibly the code cache) into 2940 // account. 2941 insertion_sort_descending(_page_sizes, n); 2942 const size_t size_limit = 2943 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 2944 int beg; 2945 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */; 2946 const int end = MIN2((int)usable_count, n) - 1; 2947 for (int cur = 0; cur < end; ++cur, ++beg) { 2948 _page_sizes[cur] = _page_sizes[beg]; 2949 } 2950 _page_sizes[end] = vm_page_size(); 2951 _page_sizes[end + 1] = 0; 2952 2953 if (_page_sizes[end] > _page_sizes[end - 1]) { 2954 // Default page size is not the smallest; sort again. 2955 insertion_sort_descending(_page_sizes, end + 1); 2956 } 2957 *page_size = _page_sizes[0]; 2958 2959 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 2960 return true; 2961} 2962 2963void os::large_page_init() { 2964 if (UseLargePages) { 2965 // print a warning if any large page related flag is specified on command line 2966 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 2967 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 2968 2969 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 2970 } 2971} 2972 2973bool os::Solaris::is_valid_page_size(size_t bytes) { 2974 for (int i = 0; _page_sizes[i] != 0; i++) { 2975 if (_page_sizes[i] == bytes) { 2976 return true; 2977 } 2978 } 2979 return false; 2980} 2981 2982bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 2983 assert(is_valid_page_size(align), SIZE_FORMAT " is not a valid page size", align); 2984 assert(is_ptr_aligned((void*) start, align), 2985 PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align); 2986 assert(is_size_aligned(bytes, align), 2987 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align); 2988 2989 // Signal to OS that we want large pages for addresses 2990 // from addr, addr + bytes 2991 struct memcntl_mha mpss_struct; 2992 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 2993 mpss_struct.mha_pagesize = align; 2994 mpss_struct.mha_flags = 0; 2995 // Upon successful completion, memcntl() returns 0 2996 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 2997 debug_only(warning("Attempt to use MPSS failed.")); 2998 return false; 2999 } 3000 return true; 3001} 3002 3003char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 3004 fatal("os::reserve_memory_special should not be called on Solaris."); 3005 return NULL; 3006} 3007 3008bool os::release_memory_special(char* base, size_t bytes) { 3009 fatal("os::release_memory_special should not be called on Solaris."); 3010 return false; 3011} 3012 3013size_t os::large_page_size() { 3014 return _large_page_size; 3015} 3016 3017// MPSS allows application to commit large page memory on demand; with ISM 3018// the entire memory region must be allocated as shared memory. 3019bool os::can_commit_large_page_memory() { 3020 return true; 3021} 3022 3023bool os::can_execute_large_page_memory() { 3024 return true; 3025} 3026 3027// Read calls from inside the vm need to perform state transitions 3028size_t os::read(int fd, void *buf, unsigned int nBytes) { 3029 size_t res; 3030 JavaThread* thread = (JavaThread*)Thread::current(); 3031 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3032 ThreadBlockInVM tbiv(thread); 3033 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3034 return res; 3035} 3036 3037size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) { 3038 size_t res; 3039 JavaThread* thread = (JavaThread*)Thread::current(); 3040 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3041 ThreadBlockInVM tbiv(thread); 3042 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res); 3043 return res; 3044} 3045 3046size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3047 size_t res; 3048 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 3049 "Assumed _thread_in_native"); 3050 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3051 return res; 3052} 3053 3054void os::naked_short_sleep(jlong ms) { 3055 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 3056 3057 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 3058 // Solaris requires -lrt for this. 3059 usleep((ms * 1000)); 3060 3061 return; 3062} 3063 3064// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3065void os::infinite_sleep() { 3066 while (true) { // sleep forever ... 3067 ::sleep(100); // ... 100 seconds at a time 3068 } 3069} 3070 3071// Used to convert frequent JVM_Yield() to nops 3072bool os::dont_yield() { 3073 if (DontYieldALot) { 3074 static hrtime_t last_time = 0; 3075 hrtime_t diff = getTimeNanos() - last_time; 3076 3077 if (diff < DontYieldALotInterval * 1000000) { 3078 return true; 3079 } 3080 3081 last_time += diff; 3082 3083 return false; 3084 } else { 3085 return false; 3086 } 3087} 3088 3089// Note that yield semantics are defined by the scheduling class to which 3090// the thread currently belongs. Typically, yield will _not yield to 3091// other equal or higher priority threads that reside on the dispatch queues 3092// of other CPUs. 3093 3094void os::naked_yield() { 3095 thr_yield(); 3096} 3097 3098// Interface for setting lwp priorities. If we are using T2 libthread, 3099// which forces the use of BoundThreads or we manually set UseBoundThreads, 3100// all of our threads will be assigned to real lwp's. Using the thr_setprio 3101// function is meaningless in this mode so we must adjust the real lwp's priority 3102// The routines below implement the getting and setting of lwp priorities. 3103// 3104// Note: T2 is now the only supported libthread. UseBoundThreads flag is 3105// being deprecated and all threads are now BoundThreads 3106// 3107// Note: There are three priority scales used on Solaris. Java priotities 3108// which range from 1 to 10, libthread "thr_setprio" scale which range 3109// from 0 to 127, and the current scheduling class of the process we 3110// are running in. This is typically from -60 to +60. 3111// The setting of the lwp priorities in done after a call to thr_setprio 3112// so Java priorities are mapped to libthread priorities and we map from 3113// the latter to lwp priorities. We don't keep priorities stored in 3114// Java priorities since some of our worker threads want to set priorities 3115// higher than all Java threads. 3116// 3117// For related information: 3118// (1) man -s 2 priocntl 3119// (2) man -s 4 priocntl 3120// (3) man dispadmin 3121// = librt.so 3122// = libthread/common/rtsched.c - thrp_setlwpprio(). 3123// = ps -cL <pid> ... to validate priority. 3124// = sched_get_priority_min and _max 3125// pthread_create 3126// sched_setparam 3127// pthread_setschedparam 3128// 3129// Assumptions: 3130// + We assume that all threads in the process belong to the same 3131// scheduling class. IE. an homogenous process. 3132// + Must be root or in IA group to change change "interactive" attribute. 3133// Priocntl() will fail silently. The only indication of failure is when 3134// we read-back the value and notice that it hasn't changed. 3135// + Interactive threads enter the runq at the head, non-interactive at the tail. 3136// + For RT, change timeslice as well. Invariant: 3137// constant "priority integral" 3138// Konst == TimeSlice * (60-Priority) 3139// Given a priority, compute appropriate timeslice. 3140// + Higher numerical values have higher priority. 3141 3142// sched class attributes 3143typedef struct { 3144 int schedPolicy; // classID 3145 int maxPrio; 3146 int minPrio; 3147} SchedInfo; 3148 3149 3150static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3151 3152#ifdef ASSERT 3153static int ReadBackValidate = 1; 3154#endif 3155static int myClass = 0; 3156static int myMin = 0; 3157static int myMax = 0; 3158static int myCur = 0; 3159static bool priocntl_enable = false; 3160 3161static const int criticalPrio = FXCriticalPriority; 3162static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3163 3164 3165// lwp_priocntl_init 3166// 3167// Try to determine the priority scale for our process. 3168// 3169// Return errno or 0 if OK. 3170// 3171static int lwp_priocntl_init() { 3172 int rslt; 3173 pcinfo_t ClassInfo; 3174 pcparms_t ParmInfo; 3175 int i; 3176 3177 if (!UseThreadPriorities) return 0; 3178 3179 // If ThreadPriorityPolicy is 1, switch tables 3180 if (ThreadPriorityPolicy == 1) { 3181 for (i = 0; i < CriticalPriority+1; i++) 3182 os::java_to_os_priority[i] = prio_policy1[i]; 3183 } 3184 if (UseCriticalJavaThreadPriority) { 3185 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3186 // See set_native_priority() and set_lwp_class_and_priority(). 3187 // Save original MaxPriority mapping in case attempt to 3188 // use critical priority fails. 3189 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3190 // Set negative to distinguish from other priorities 3191 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3192 } 3193 3194 // Get IDs for a set of well-known scheduling classes. 3195 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3196 // the system. We should have a loop that iterates over the 3197 // classID values, which are known to be "small" integers. 3198 3199 strcpy(ClassInfo.pc_clname, "TS"); 3200 ClassInfo.pc_cid = -1; 3201 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3202 if (rslt < 0) return errno; 3203 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3204 tsLimits.schedPolicy = ClassInfo.pc_cid; 3205 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3206 tsLimits.minPrio = -tsLimits.maxPrio; 3207 3208 strcpy(ClassInfo.pc_clname, "IA"); 3209 ClassInfo.pc_cid = -1; 3210 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3211 if (rslt < 0) return errno; 3212 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3213 iaLimits.schedPolicy = ClassInfo.pc_cid; 3214 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3215 iaLimits.minPrio = -iaLimits.maxPrio; 3216 3217 strcpy(ClassInfo.pc_clname, "RT"); 3218 ClassInfo.pc_cid = -1; 3219 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3220 if (rslt < 0) return errno; 3221 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3222 rtLimits.schedPolicy = ClassInfo.pc_cid; 3223 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3224 rtLimits.minPrio = 0; 3225 3226 strcpy(ClassInfo.pc_clname, "FX"); 3227 ClassInfo.pc_cid = -1; 3228 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3229 if (rslt < 0) return errno; 3230 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3231 fxLimits.schedPolicy = ClassInfo.pc_cid; 3232 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3233 fxLimits.minPrio = 0; 3234 3235 // Query our "current" scheduling class. 3236 // This will normally be IA, TS or, rarely, FX or RT. 3237 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3238 ParmInfo.pc_cid = PC_CLNULL; 3239 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3240 if (rslt < 0) return errno; 3241 myClass = ParmInfo.pc_cid; 3242 3243 // We now know our scheduling classId, get specific information 3244 // about the class. 3245 ClassInfo.pc_cid = myClass; 3246 ClassInfo.pc_clname[0] = 0; 3247 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3248 if (rslt < 0) return errno; 3249 3250 if (ThreadPriorityVerbose) { 3251 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3252 } 3253 3254 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3255 ParmInfo.pc_cid = PC_CLNULL; 3256 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3257 if (rslt < 0) return errno; 3258 3259 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3260 myMin = rtLimits.minPrio; 3261 myMax = rtLimits.maxPrio; 3262 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3263 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3264 myMin = iaLimits.minPrio; 3265 myMax = iaLimits.maxPrio; 3266 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3267 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3268 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3269 myMin = tsLimits.minPrio; 3270 myMax = tsLimits.maxPrio; 3271 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3272 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3273 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3274 myMin = fxLimits.minPrio; 3275 myMax = fxLimits.maxPrio; 3276 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3277 } else { 3278 // No clue - punt 3279 if (ThreadPriorityVerbose) { 3280 tty->print_cr("Unknown scheduling class: %s ... \n", 3281 ClassInfo.pc_clname); 3282 } 3283 return EINVAL; // no clue, punt 3284 } 3285 3286 if (ThreadPriorityVerbose) { 3287 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax); 3288 } 3289 3290 priocntl_enable = true; // Enable changing priorities 3291 return 0; 3292} 3293 3294#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3295#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3296#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3297#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3298 3299 3300// scale_to_lwp_priority 3301// 3302// Convert from the libthread "thr_setprio" scale to our current 3303// lwp scheduling class scale. 3304// 3305static int scale_to_lwp_priority(int rMin, int rMax, int x) { 3306 int v; 3307 3308 if (x == 127) return rMax; // avoid round-down 3309 v = (((x*(rMax-rMin)))/128)+rMin; 3310 return v; 3311} 3312 3313 3314// set_lwp_class_and_priority 3315int set_lwp_class_and_priority(int ThreadID, int lwpid, 3316 int newPrio, int new_class, bool scale) { 3317 int rslt; 3318 int Actual, Expected, prv; 3319 pcparms_t ParmInfo; // for GET-SET 3320#ifdef ASSERT 3321 pcparms_t ReadBack; // for readback 3322#endif 3323 3324 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3325 // Query current values. 3326 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3327 // Cache "pcparms_t" in global ParmCache. 3328 // TODO: elide set-to-same-value 3329 3330 // If something went wrong on init, don't change priorities. 3331 if (!priocntl_enable) { 3332 if (ThreadPriorityVerbose) { 3333 tty->print_cr("Trying to set priority but init failed, ignoring"); 3334 } 3335 return EINVAL; 3336 } 3337 3338 // If lwp hasn't started yet, just return 3339 // the _start routine will call us again. 3340 if (lwpid <= 0) { 3341 if (ThreadPriorityVerbose) { 3342 tty->print_cr("deferring the set_lwp_class_and_priority of thread " 3343 INTPTR_FORMAT " to %d, lwpid not set", 3344 ThreadID, newPrio); 3345 } 3346 return 0; 3347 } 3348 3349 if (ThreadPriorityVerbose) { 3350 tty->print_cr ("set_lwp_class_and_priority(" 3351 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3352 ThreadID, lwpid, newPrio); 3353 } 3354 3355 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3356 ParmInfo.pc_cid = PC_CLNULL; 3357 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3358 if (rslt < 0) return errno; 3359 3360 int cur_class = ParmInfo.pc_cid; 3361 ParmInfo.pc_cid = (id_t)new_class; 3362 3363 if (new_class == rtLimits.schedPolicy) { 3364 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3365 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3366 rtLimits.maxPrio, newPrio) 3367 : newPrio; 3368 rtInfo->rt_tqsecs = RT_NOCHANGE; 3369 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3370 if (ThreadPriorityVerbose) { 3371 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3372 } 3373 } else if (new_class == iaLimits.schedPolicy) { 3374 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3375 int maxClamped = MIN2(iaLimits.maxPrio, 3376 cur_class == new_class 3377 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3378 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3379 maxClamped, newPrio) 3380 : newPrio; 3381 iaInfo->ia_uprilim = cur_class == new_class 3382 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3383 iaInfo->ia_mode = IA_NOCHANGE; 3384 if (ThreadPriorityVerbose) { 3385 tty->print_cr("IA: [%d...%d] %d->%d\n", 3386 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3387 } 3388 } else if (new_class == tsLimits.schedPolicy) { 3389 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3390 int maxClamped = MIN2(tsLimits.maxPrio, 3391 cur_class == new_class 3392 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3393 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3394 maxClamped, newPrio) 3395 : newPrio; 3396 tsInfo->ts_uprilim = cur_class == new_class 3397 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3398 if (ThreadPriorityVerbose) { 3399 tty->print_cr("TS: [%d...%d] %d->%d\n", 3400 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3401 } 3402 } else if (new_class == fxLimits.schedPolicy) { 3403 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3404 int maxClamped = MIN2(fxLimits.maxPrio, 3405 cur_class == new_class 3406 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3407 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3408 maxClamped, newPrio) 3409 : newPrio; 3410 fxInfo->fx_uprilim = cur_class == new_class 3411 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3412 fxInfo->fx_tqsecs = FX_NOCHANGE; 3413 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3414 if (ThreadPriorityVerbose) { 3415 tty->print_cr("FX: [%d...%d] %d->%d\n", 3416 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3417 } 3418 } else { 3419 if (ThreadPriorityVerbose) { 3420 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3421 } 3422 return EINVAL; // no clue, punt 3423 } 3424 3425 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3426 if (ThreadPriorityVerbose && rslt) { 3427 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3428 } 3429 if (rslt < 0) return errno; 3430 3431#ifdef ASSERT 3432 // Sanity check: read back what we just attempted to set. 3433 // In theory it could have changed in the interim ... 3434 // 3435 // The priocntl system call is tricky. 3436 // Sometimes it'll validate the priority value argument and 3437 // return EINVAL if unhappy. At other times it fails silently. 3438 // Readbacks are prudent. 3439 3440 if (!ReadBackValidate) return 0; 3441 3442 memset(&ReadBack, 0, sizeof(pcparms_t)); 3443 ReadBack.pc_cid = PC_CLNULL; 3444 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3445 assert(rslt >= 0, "priocntl failed"); 3446 Actual = Expected = 0xBAD; 3447 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3448 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3449 Actual = RTPRI(ReadBack)->rt_pri; 3450 Expected = RTPRI(ParmInfo)->rt_pri; 3451 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3452 Actual = IAPRI(ReadBack)->ia_upri; 3453 Expected = IAPRI(ParmInfo)->ia_upri; 3454 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3455 Actual = TSPRI(ReadBack)->ts_upri; 3456 Expected = TSPRI(ParmInfo)->ts_upri; 3457 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3458 Actual = FXPRI(ReadBack)->fx_upri; 3459 Expected = FXPRI(ParmInfo)->fx_upri; 3460 } else { 3461 if (ThreadPriorityVerbose) { 3462 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 3463 ParmInfo.pc_cid); 3464 } 3465 } 3466 3467 if (Actual != Expected) { 3468 if (ThreadPriorityVerbose) { 3469 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3470 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3471 } 3472 } 3473#endif 3474 3475 return 0; 3476} 3477 3478// Solaris only gives access to 128 real priorities at a time, 3479// so we expand Java's ten to fill this range. This would be better 3480// if we dynamically adjusted relative priorities. 3481// 3482// The ThreadPriorityPolicy option allows us to select 2 different 3483// priority scales. 3484// 3485// ThreadPriorityPolicy=0 3486// Since the Solaris' default priority is MaximumPriority, we do not 3487// set a priority lower than Max unless a priority lower than 3488// NormPriority is requested. 3489// 3490// ThreadPriorityPolicy=1 3491// This mode causes the priority table to get filled with 3492// linear values. NormPriority get's mapped to 50% of the 3493// Maximum priority an so on. This will cause VM threads 3494// to get unfair treatment against other Solaris processes 3495// which do not explicitly alter their thread priorities. 3496 3497int os::java_to_os_priority[CriticalPriority + 1] = { 3498 -99999, // 0 Entry should never be used 3499 3500 0, // 1 MinPriority 3501 32, // 2 3502 64, // 3 3503 3504 96, // 4 3505 127, // 5 NormPriority 3506 127, // 6 3507 3508 127, // 7 3509 127, // 8 3510 127, // 9 NearMaxPriority 3511 3512 127, // 10 MaxPriority 3513 3514 -criticalPrio // 11 CriticalPriority 3515}; 3516 3517OSReturn os::set_native_priority(Thread* thread, int newpri) { 3518 OSThread* osthread = thread->osthread(); 3519 3520 // Save requested priority in case the thread hasn't been started 3521 osthread->set_native_priority(newpri); 3522 3523 // Check for critical priority request 3524 bool fxcritical = false; 3525 if (newpri == -criticalPrio) { 3526 fxcritical = true; 3527 newpri = criticalPrio; 3528 } 3529 3530 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3531 if (!UseThreadPriorities) return OS_OK; 3532 3533 int status = 0; 3534 3535 if (!fxcritical) { 3536 // Use thr_setprio only if we have a priority that thr_setprio understands 3537 status = thr_setprio(thread->osthread()->thread_id(), newpri); 3538 } 3539 3540 int lwp_status = 3541 set_lwp_class_and_priority(osthread->thread_id(), 3542 osthread->lwp_id(), 3543 newpri, 3544 fxcritical ? fxLimits.schedPolicy : myClass, 3545 !fxcritical); 3546 if (lwp_status != 0 && fxcritical) { 3547 // Try again, this time without changing the scheduling class 3548 newpri = java_MaxPriority_to_os_priority; 3549 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 3550 osthread->lwp_id(), 3551 newpri, myClass, false); 3552 } 3553 status |= lwp_status; 3554 return (status == 0) ? OS_OK : OS_ERR; 3555} 3556 3557 3558OSReturn os::get_native_priority(const Thread* const thread, 3559 int *priority_ptr) { 3560 int p; 3561 if (!UseThreadPriorities) { 3562 *priority_ptr = NormalPriority; 3563 return OS_OK; 3564 } 3565 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3566 if (status != 0) { 3567 return OS_ERR; 3568 } 3569 *priority_ptr = p; 3570 return OS_OK; 3571} 3572 3573 3574// Hint to the underlying OS that a task switch would not be good. 3575// Void return because it's a hint and can fail. 3576void os::hint_no_preempt() { 3577 schedctl_start(schedctl_init()); 3578} 3579 3580static void resume_clear_context(OSThread *osthread) { 3581 osthread->set_ucontext(NULL); 3582} 3583 3584static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 3585 osthread->set_ucontext(context); 3586} 3587 3588static PosixSemaphore sr_semaphore; 3589 3590void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) { 3591 // Save and restore errno to avoid confusing native code with EINTR 3592 // after sigsuspend. 3593 int old_errno = errno; 3594 3595 OSThread* osthread = thread->osthread(); 3596 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 3597 3598 os::SuspendResume::State current = osthread->sr.state(); 3599 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 3600 suspend_save_context(osthread, uc); 3601 3602 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 3603 os::SuspendResume::State state = osthread->sr.suspended(); 3604 if (state == os::SuspendResume::SR_SUSPENDED) { 3605 sigset_t suspend_set; // signals for sigsuspend() 3606 3607 // get current set of blocked signals and unblock resume signal 3608 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); 3609 sigdelset(&suspend_set, os::Solaris::SIGasync()); 3610 3611 sr_semaphore.signal(); 3612 // wait here until we are resumed 3613 while (1) { 3614 sigsuspend(&suspend_set); 3615 3616 os::SuspendResume::State result = osthread->sr.running(); 3617 if (result == os::SuspendResume::SR_RUNNING) { 3618 sr_semaphore.signal(); 3619 break; 3620 } 3621 } 3622 3623 } else if (state == os::SuspendResume::SR_RUNNING) { 3624 // request was cancelled, continue 3625 } else { 3626 ShouldNotReachHere(); 3627 } 3628 3629 resume_clear_context(osthread); 3630 } else if (current == os::SuspendResume::SR_RUNNING) { 3631 // request was cancelled, continue 3632 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 3633 // ignore 3634 } else { 3635 // ignore 3636 } 3637 3638 errno = old_errno; 3639} 3640 3641void os::print_statistics() { 3642} 3643 3644bool os::message_box(const char* title, const char* message) { 3645 int i; 3646 fdStream err(defaultStream::error_fd()); 3647 for (i = 0; i < 78; i++) err.print_raw("="); 3648 err.cr(); 3649 err.print_raw_cr(title); 3650 for (i = 0; i < 78; i++) err.print_raw("-"); 3651 err.cr(); 3652 err.print_raw_cr(message); 3653 for (i = 0; i < 78; i++) err.print_raw("="); 3654 err.cr(); 3655 3656 char buf[16]; 3657 // Prevent process from exiting upon "read error" without consuming all CPU 3658 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3659 3660 return buf[0] == 'y' || buf[0] == 'Y'; 3661} 3662 3663static int sr_notify(OSThread* osthread) { 3664 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync()); 3665 assert_status(status == 0, status, "thr_kill"); 3666 return status; 3667} 3668 3669// "Randomly" selected value for how long we want to spin 3670// before bailing out on suspending a thread, also how often 3671// we send a signal to a thread we want to resume 3672static const int RANDOMLY_LARGE_INTEGER = 1000000; 3673static const int RANDOMLY_LARGE_INTEGER2 = 100; 3674 3675static bool do_suspend(OSThread* osthread) { 3676 assert(osthread->sr.is_running(), "thread should be running"); 3677 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 3678 3679 // mark as suspended and send signal 3680 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 3681 // failed to switch, state wasn't running? 3682 ShouldNotReachHere(); 3683 return false; 3684 } 3685 3686 if (sr_notify(osthread) != 0) { 3687 ShouldNotReachHere(); 3688 } 3689 3690 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 3691 while (true) { 3692 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) { 3693 break; 3694 } else { 3695 // timeout 3696 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 3697 if (cancelled == os::SuspendResume::SR_RUNNING) { 3698 return false; 3699 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 3700 // make sure that we consume the signal on the semaphore as well 3701 sr_semaphore.wait(); 3702 break; 3703 } else { 3704 ShouldNotReachHere(); 3705 return false; 3706 } 3707 } 3708 } 3709 3710 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 3711 return true; 3712} 3713 3714static void do_resume(OSThread* osthread) { 3715 assert(osthread->sr.is_suspended(), "thread should be suspended"); 3716 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 3717 3718 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 3719 // failed to switch to WAKEUP_REQUEST 3720 ShouldNotReachHere(); 3721 return; 3722 } 3723 3724 while (true) { 3725 if (sr_notify(osthread) == 0) { 3726 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { 3727 if (osthread->sr.is_running()) { 3728 return; 3729 } 3730 } 3731 } else { 3732 ShouldNotReachHere(); 3733 } 3734 } 3735 3736 guarantee(osthread->sr.is_running(), "Must be running!"); 3737} 3738 3739void os::SuspendedThreadTask::internal_do_task() { 3740 if (do_suspend(_thread->osthread())) { 3741 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 3742 do_task(context); 3743 do_resume(_thread->osthread()); 3744 } 3745} 3746 3747class PcFetcher : public os::SuspendedThreadTask { 3748 public: 3749 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} 3750 ExtendedPC result(); 3751 protected: 3752 void do_task(const os::SuspendedThreadTaskContext& context); 3753 private: 3754 ExtendedPC _epc; 3755}; 3756 3757ExtendedPC PcFetcher::result() { 3758 guarantee(is_done(), "task is not done yet."); 3759 return _epc; 3760} 3761 3762void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { 3763 Thread* thread = context.thread(); 3764 OSThread* osthread = thread->osthread(); 3765 if (osthread->ucontext() != NULL) { 3766 _epc = os::Solaris::ucontext_get_pc((const ucontext_t *) context.ucontext()); 3767 } else { 3768 // NULL context is unexpected, double-check this is the VMThread 3769 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); 3770 } 3771} 3772 3773// A lightweight implementation that does not suspend the target thread and 3774// thus returns only a hint. Used for profiling only! 3775ExtendedPC os::get_thread_pc(Thread* thread) { 3776 // Make sure that it is called by the watcher and the Threads lock is owned. 3777 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3778 // For now, is only used to profile the VM Thread 3779 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3780 PcFetcher fetcher(thread); 3781 fetcher.run(); 3782 return fetcher.result(); 3783} 3784 3785 3786// This does not do anything on Solaris. This is basically a hook for being 3787// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3788void os::os_exception_wrapper(java_call_t f, JavaValue* value, 3789 const methodHandle& method, JavaCallArguments* args, 3790 Thread* thread) { 3791 f(value, method, args, thread); 3792} 3793 3794// This routine may be used by user applications as a "hook" to catch signals. 3795// The user-defined signal handler must pass unrecognized signals to this 3796// routine, and if it returns true (non-zero), then the signal handler must 3797// return immediately. If the flag "abort_if_unrecognized" is true, then this 3798// routine will never retun false (zero), but instead will execute a VM panic 3799// routine kill the process. 3800// 3801// If this routine returns false, it is OK to call it again. This allows 3802// the user-defined signal handler to perform checks either before or after 3803// the VM performs its own checks. Naturally, the user code would be making 3804// a serious error if it tried to handle an exception (such as a null check 3805// or breakpoint) that the VM was generating for its own correct operation. 3806// 3807// This routine may recognize any of the following kinds of signals: 3808// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3809// os::Solaris::SIGasync 3810// It should be consulted by handlers for any of those signals. 3811// 3812// The caller of this routine must pass in the three arguments supplied 3813// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3814// field of the structure passed to sigaction(). This routine assumes that 3815// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3816// 3817// Note that the VM will print warnings if it detects conflicting signal 3818// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3819// 3820extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo, 3821 siginfo_t* siginfo, 3822 void* ucontext, 3823 int abort_if_unrecognized); 3824 3825 3826void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3827 int orig_errno = errno; // Preserve errno value over signal handler. 3828 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3829 errno = orig_errno; 3830} 3831 3832// This boolean allows users to forward their own non-matching signals 3833// to JVM_handle_solaris_signal, harmlessly. 3834bool os::Solaris::signal_handlers_are_installed = false; 3835 3836// For signal-chaining 3837bool os::Solaris::libjsig_is_loaded = false; 3838typedef struct sigaction *(*get_signal_t)(int); 3839get_signal_t os::Solaris::get_signal_action = NULL; 3840 3841struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3842 struct sigaction *actp = NULL; 3843 3844 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 3845 // Retrieve the old signal handler from libjsig 3846 actp = (*get_signal_action)(sig); 3847 } 3848 if (actp == NULL) { 3849 // Retrieve the preinstalled signal handler from jvm 3850 actp = get_preinstalled_handler(sig); 3851 } 3852 3853 return actp; 3854} 3855 3856static bool call_chained_handler(struct sigaction *actp, int sig, 3857 siginfo_t *siginfo, void *context) { 3858 // Call the old signal handler 3859 if (actp->sa_handler == SIG_DFL) { 3860 // It's more reasonable to let jvm treat it as an unexpected exception 3861 // instead of taking the default action. 3862 return false; 3863 } else if (actp->sa_handler != SIG_IGN) { 3864 if ((actp->sa_flags & SA_NODEFER) == 0) { 3865 // automaticlly block the signal 3866 sigaddset(&(actp->sa_mask), sig); 3867 } 3868 3869 sa_handler_t hand; 3870 sa_sigaction_t sa; 3871 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 3872 // retrieve the chained handler 3873 if (siginfo_flag_set) { 3874 sa = actp->sa_sigaction; 3875 } else { 3876 hand = actp->sa_handler; 3877 } 3878 3879 if ((actp->sa_flags & SA_RESETHAND) != 0) { 3880 actp->sa_handler = SIG_DFL; 3881 } 3882 3883 // try to honor the signal mask 3884 sigset_t oset; 3885 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); 3886 3887 // call into the chained handler 3888 if (siginfo_flag_set) { 3889 (*sa)(sig, siginfo, context); 3890 } else { 3891 (*hand)(sig); 3892 } 3893 3894 // restore the signal mask 3895 pthread_sigmask(SIG_SETMASK, &oset, 0); 3896 } 3897 // Tell jvm's signal handler the signal is taken care of. 3898 return true; 3899} 3900 3901bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 3902 bool chained = false; 3903 // signal-chaining 3904 if (UseSignalChaining) { 3905 struct sigaction *actp = get_chained_signal_action(sig); 3906 if (actp != NULL) { 3907 chained = call_chained_handler(actp, sig, siginfo, context); 3908 } 3909 } 3910 return chained; 3911} 3912 3913struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 3914 assert((chainedsigactions != (struct sigaction *)NULL) && 3915 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3916 if (preinstalled_sigs[sig] != 0) { 3917 return &chainedsigactions[sig]; 3918 } 3919 return NULL; 3920} 3921 3922void os::Solaris::save_preinstalled_handler(int sig, 3923 struct sigaction& oldAct) { 3924 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 3925 assert((chainedsigactions != (struct sigaction *)NULL) && 3926 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3927 chainedsigactions[sig] = oldAct; 3928 preinstalled_sigs[sig] = 1; 3929} 3930 3931void os::Solaris::set_signal_handler(int sig, bool set_installed, 3932 bool oktochain) { 3933 // Check for overwrite. 3934 struct sigaction oldAct; 3935 sigaction(sig, (struct sigaction*)NULL, &oldAct); 3936 void* oldhand = 3937 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3938 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3939 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 3940 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 3941 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 3942 if (AllowUserSignalHandlers || !set_installed) { 3943 // Do not overwrite; user takes responsibility to forward to us. 3944 return; 3945 } else if (UseSignalChaining) { 3946 if (oktochain) { 3947 // save the old handler in jvm 3948 save_preinstalled_handler(sig, oldAct); 3949 } else { 3950 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal."); 3951 } 3952 // libjsig also interposes the sigaction() call below and saves the 3953 // old sigaction on it own. 3954 } else { 3955 fatal("Encountered unexpected pre-existing sigaction handler " 3956 "%#lx for signal %d.", (long)oldhand, sig); 3957 } 3958 } 3959 3960 struct sigaction sigAct; 3961 sigfillset(&(sigAct.sa_mask)); 3962 sigAct.sa_handler = SIG_DFL; 3963 3964 sigAct.sa_sigaction = signalHandler; 3965 // Handle SIGSEGV on alternate signal stack if 3966 // not using stack banging 3967 if (!UseStackBanging && sig == SIGSEGV) { 3968 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 3969 } else { 3970 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 3971 } 3972 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 3973 3974 sigaction(sig, &sigAct, &oldAct); 3975 3976 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3977 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3978 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 3979} 3980 3981 3982#define DO_SIGNAL_CHECK(sig) \ 3983 do { \ 3984 if (!sigismember(&check_signal_done, sig)) { \ 3985 os::Solaris::check_signal_handler(sig); \ 3986 } \ 3987 } while (0) 3988 3989// This method is a periodic task to check for misbehaving JNI applications 3990// under CheckJNI, we can add any periodic checks here 3991 3992void os::run_periodic_checks() { 3993 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 3994 // thereby preventing a NULL checks. 3995 if (!check_addr0_done) check_addr0_done = check_addr0(tty); 3996 3997 if (check_signals == false) return; 3998 3999 // SEGV and BUS if overridden could potentially prevent 4000 // generation of hs*.log in the event of a crash, debugging 4001 // such a case can be very challenging, so we absolutely 4002 // check for the following for a good measure: 4003 DO_SIGNAL_CHECK(SIGSEGV); 4004 DO_SIGNAL_CHECK(SIGILL); 4005 DO_SIGNAL_CHECK(SIGFPE); 4006 DO_SIGNAL_CHECK(SIGBUS); 4007 DO_SIGNAL_CHECK(SIGPIPE); 4008 DO_SIGNAL_CHECK(SIGXFSZ); 4009 4010 // ReduceSignalUsage allows the user to override these handlers 4011 // see comments at the very top and jvm_solaris.h 4012 if (!ReduceSignalUsage) { 4013 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4014 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4015 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4016 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4017 } 4018 4019 // See comments above for using JVM1/JVM2 4020 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4021 4022} 4023 4024typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4025 4026static os_sigaction_t os_sigaction = NULL; 4027 4028void os::Solaris::check_signal_handler(int sig) { 4029 char buf[O_BUFLEN]; 4030 address jvmHandler = NULL; 4031 4032 struct sigaction act; 4033 if (os_sigaction == NULL) { 4034 // only trust the default sigaction, in case it has been interposed 4035 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4036 if (os_sigaction == NULL) return; 4037 } 4038 4039 os_sigaction(sig, (struct sigaction*)NULL, &act); 4040 4041 address thisHandler = (act.sa_flags & SA_SIGINFO) 4042 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4043 : CAST_FROM_FN_PTR(address, act.sa_handler); 4044 4045 4046 switch (sig) { 4047 case SIGSEGV: 4048 case SIGBUS: 4049 case SIGFPE: 4050 case SIGPIPE: 4051 case SIGXFSZ: 4052 case SIGILL: 4053 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4054 break; 4055 4056 case SHUTDOWN1_SIGNAL: 4057 case SHUTDOWN2_SIGNAL: 4058 case SHUTDOWN3_SIGNAL: 4059 case BREAK_SIGNAL: 4060 jvmHandler = (address)user_handler(); 4061 break; 4062 4063 default: 4064 int asynsig = os::Solaris::SIGasync(); 4065 4066 if (sig == asynsig) { 4067 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4068 } else { 4069 return; 4070 } 4071 break; 4072 } 4073 4074 4075 if (thisHandler != jvmHandler) { 4076 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4077 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4078 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4079 // No need to check this sig any longer 4080 sigaddset(&check_signal_done, sig); 4081 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN 4082 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { 4083 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", 4084 exception_name(sig, buf, O_BUFLEN)); 4085 } 4086 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4087 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4088 tty->print("expected:"); 4089 os::Posix::print_sa_flags(tty, os::Solaris::get_our_sigflags(sig)); 4090 tty->cr(); 4091 tty->print(" found:"); 4092 os::Posix::print_sa_flags(tty, act.sa_flags); 4093 tty->cr(); 4094 // No need to check this sig any longer 4095 sigaddset(&check_signal_done, sig); 4096 } 4097 4098 // Print all the signal handler state 4099 if (sigismember(&check_signal_done, sig)) { 4100 print_signal_handlers(tty, buf, O_BUFLEN); 4101 } 4102 4103} 4104 4105void os::Solaris::install_signal_handlers() { 4106 bool libjsigdone = false; 4107 signal_handlers_are_installed = true; 4108 4109 // signal-chaining 4110 typedef void (*signal_setting_t)(); 4111 signal_setting_t begin_signal_setting = NULL; 4112 signal_setting_t end_signal_setting = NULL; 4113 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4114 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4115 if (begin_signal_setting != NULL) { 4116 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4117 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4118 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4119 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4120 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4121 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4122 libjsig_is_loaded = true; 4123 if (os::Solaris::get_libjsig_version != NULL) { 4124 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4125 } 4126 assert(UseSignalChaining, "should enable signal-chaining"); 4127 } 4128 if (libjsig_is_loaded) { 4129 // Tell libjsig jvm is setting signal handlers 4130 (*begin_signal_setting)(); 4131 } 4132 4133 set_signal_handler(SIGSEGV, true, true); 4134 set_signal_handler(SIGPIPE, true, true); 4135 set_signal_handler(SIGXFSZ, true, true); 4136 set_signal_handler(SIGBUS, true, true); 4137 set_signal_handler(SIGILL, true, true); 4138 set_signal_handler(SIGFPE, true, true); 4139 4140 4141 if (os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4142 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4143 // can not register overridable signals which might be > 32 4144 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4145 // Tell libjsig jvm has finished setting signal handlers 4146 (*end_signal_setting)(); 4147 libjsigdone = true; 4148 } 4149 } 4150 4151 set_signal_handler(os::Solaris::SIGasync(), true, true); 4152 4153 if (libjsig_is_loaded && !libjsigdone) { 4154 // Tell libjsig jvm finishes setting signal handlers 4155 (*end_signal_setting)(); 4156 } 4157 4158 // We don't activate signal checker if libjsig is in place, we trust ourselves 4159 // and if UserSignalHandler is installed all bets are off. 4160 // Log that signal checking is off only if -verbose:jni is specified. 4161 if (CheckJNICalls) { 4162 if (libjsig_is_loaded) { 4163 if (PrintJNIResolving) { 4164 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4165 } 4166 check_signals = false; 4167 } 4168 if (AllowUserSignalHandlers) { 4169 if (PrintJNIResolving) { 4170 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4171 } 4172 check_signals = false; 4173 } 4174 } 4175} 4176 4177 4178void report_error(const char* file_name, int line_no, const char* title, 4179 const char* format, ...); 4180 4181// (Static) wrapper for getisax(2) call. 4182os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4183 4184// (Static) wrappers for the liblgrp API 4185os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4186os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4187os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4188os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4189os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4190os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4191os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4192os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4193os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4194 4195// (Static) wrapper for meminfo() call. 4196os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4197 4198static address resolve_symbol_lazy(const char* name) { 4199 address addr = (address) dlsym(RTLD_DEFAULT, name); 4200 if (addr == NULL) { 4201 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4202 addr = (address) dlsym(RTLD_NEXT, name); 4203 } 4204 return addr; 4205} 4206 4207static address resolve_symbol(const char* name) { 4208 address addr = resolve_symbol_lazy(name); 4209 if (addr == NULL) { 4210 fatal(dlerror()); 4211 } 4212 return addr; 4213} 4214 4215void os::Solaris::libthread_init() { 4216 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4217 4218 lwp_priocntl_init(); 4219 4220 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4221 if (func == NULL) { 4222 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4223 // Guarantee that this VM is running on an new enough OS (5.6 or 4224 // later) that it will have a new enough libthread.so. 4225 guarantee(func != NULL, "libthread.so is too old."); 4226 } 4227 4228 int size; 4229 void (*handler_info_func)(address *, int *); 4230 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4231 handler_info_func(&handler_start, &size); 4232 handler_end = handler_start + size; 4233} 4234 4235 4236int_fnP_mutex_tP os::Solaris::_mutex_lock; 4237int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4238int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4239int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4240int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4241int os::Solaris::_mutex_scope = USYNC_THREAD; 4242 4243int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4244int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4245int_fnP_cond_tP os::Solaris::_cond_signal; 4246int_fnP_cond_tP os::Solaris::_cond_broadcast; 4247int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4248int_fnP_cond_tP os::Solaris::_cond_destroy; 4249int os::Solaris::_cond_scope = USYNC_THREAD; 4250 4251void os::Solaris::synchronization_init() { 4252 if (UseLWPSynchronization) { 4253 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4254 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4255 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4256 os::Solaris::set_mutex_init(lwp_mutex_init); 4257 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4258 os::Solaris::set_mutex_scope(USYNC_THREAD); 4259 4260 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4261 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4262 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4263 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4264 os::Solaris::set_cond_init(lwp_cond_init); 4265 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4266 os::Solaris::set_cond_scope(USYNC_THREAD); 4267 } else { 4268 os::Solaris::set_mutex_scope(USYNC_THREAD); 4269 os::Solaris::set_cond_scope(USYNC_THREAD); 4270 4271 if (UsePthreads) { 4272 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4273 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4274 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4275 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4276 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4277 4278 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4279 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4280 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4281 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4282 os::Solaris::set_cond_init(pthread_cond_default_init); 4283 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4284 } else { 4285 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4286 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4287 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4288 os::Solaris::set_mutex_init(::mutex_init); 4289 os::Solaris::set_mutex_destroy(::mutex_destroy); 4290 4291 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4292 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4293 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4294 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4295 os::Solaris::set_cond_init(::cond_init); 4296 os::Solaris::set_cond_destroy(::cond_destroy); 4297 } 4298 } 4299} 4300 4301bool os::Solaris::liblgrp_init() { 4302 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4303 if (handle != NULL) { 4304 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4305 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4306 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4307 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4308 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4309 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4310 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4311 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4312 dlsym(handle, "lgrp_cookie_stale"))); 4313 4314 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4315 set_lgrp_cookie(c); 4316 return true; 4317 } 4318 return false; 4319} 4320 4321void os::Solaris::misc_sym_init() { 4322 address func; 4323 4324 // getisax 4325 func = resolve_symbol_lazy("getisax"); 4326 if (func != NULL) { 4327 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4328 } 4329 4330 // meminfo 4331 func = resolve_symbol_lazy("meminfo"); 4332 if (func != NULL) { 4333 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4334 } 4335} 4336 4337uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4338 assert(_getisax != NULL, "_getisax not set"); 4339 return _getisax(array, n); 4340} 4341 4342// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4343typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4344static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4345 4346void init_pset_getloadavg_ptr(void) { 4347 pset_getloadavg_ptr = 4348 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4349 if (pset_getloadavg_ptr == NULL) { 4350 log_warning(os)("pset_getloadavg function not found"); 4351 } 4352} 4353 4354int os::Solaris::_dev_zero_fd = -1; 4355 4356// this is called _before_ the global arguments have been parsed 4357void os::init(void) { 4358 _initial_pid = getpid(); 4359 4360 max_hrtime = first_hrtime = gethrtime(); 4361 4362 init_random(1234567); 4363 4364 page_size = sysconf(_SC_PAGESIZE); 4365 if (page_size == -1) { 4366 fatal("os_solaris.cpp: os::init: sysconf failed (%s)", os::strerror(errno)); 4367 } 4368 init_page_sizes((size_t) page_size); 4369 4370 Solaris::initialize_system_info(); 4371 4372 // Initialize misc. symbols as soon as possible, so we can use them 4373 // if we need them. 4374 Solaris::misc_sym_init(); 4375 4376 int fd = ::open("/dev/zero", O_RDWR); 4377 if (fd < 0) { 4378 fatal("os::init: cannot open /dev/zero (%s)", os::strerror(errno)); 4379 } else { 4380 Solaris::set_dev_zero_fd(fd); 4381 4382 // Close on exec, child won't inherit. 4383 fcntl(fd, F_SETFD, FD_CLOEXEC); 4384 } 4385 4386 clock_tics_per_sec = CLK_TCK; 4387 4388 // check if dladdr1() exists; dladdr1 can provide more information than 4389 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4390 // and is available on linker patches for 5.7 and 5.8. 4391 // libdl.so must have been loaded, this call is just an entry lookup 4392 void * hdl = dlopen("libdl.so", RTLD_NOW); 4393 if (hdl) { 4394 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4395 } 4396 4397 // (Solaris only) this switches to calls that actually do locking. 4398 ThreadCritical::initialize(); 4399 4400 main_thread = thr_self(); 4401 4402 // Constant minimum stack size allowed. It must be at least 4403 // the minimum of what the OS supports (thr_min_stack()), and 4404 // enough to allow the thread to get to user bytecode execution. 4405 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4406 4407 // dynamic lookup of functions that may not be available in our lowest 4408 // supported Solaris release 4409 void * handle = dlopen("libc.so.1", RTLD_LAZY); 4410 if (handle != NULL) { 4411 Solaris::_pthread_setname_np = // from 11.3 4412 (Solaris::pthread_setname_np_func_t)dlsym(handle, "pthread_setname_np"); 4413 } 4414} 4415 4416// To install functions for atexit system call 4417extern "C" { 4418 static void perfMemory_exit_helper() { 4419 perfMemory_exit(); 4420 } 4421} 4422 4423// this is called _after_ the global arguments have been parsed 4424jint os::init_2(void) { 4425 // try to enable extended file IO ASAP, see 6431278 4426 os::Solaris::try_enable_extended_io(); 4427 4428 // Allocate a single page and mark it as readable for safepoint polling. Also 4429 // use this first mmap call to check support for MAP_ALIGN. 4430 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4431 page_size, 4432 MAP_PRIVATE | MAP_ALIGN, 4433 PROT_READ); 4434 if (polling_page == NULL) { 4435 has_map_align = false; 4436 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4437 PROT_READ); 4438 } 4439 4440 os::set_polling_page(polling_page); 4441 log_info(os)("SafePoint Polling address: " INTPTR_FORMAT, p2i(polling_page)); 4442 4443 if (!UseMembar) { 4444 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE); 4445 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4446 os::set_memory_serialize_page(mem_serialize_page); 4447 log_info(os)("Memory Serialize Page address: " INTPTR_FORMAT, p2i(mem_serialize_page)); 4448 } 4449 4450 // Check minimum allowable stack size for thread creation and to initialize 4451 // the java system classes, including StackOverflowError - depends on page 4452 // size. Add two 4K pages for compiler2 recursion in main thread. 4453 // Add in 4*BytesPerWord 4K pages to account for VM stack during 4454 // class initialization depending on 32 or 64 bit VM. 4455 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4456 JavaThread::stack_guard_zone_size() + 4457 JavaThread::stack_shadow_zone_size() + 4458 (4*BytesPerWord COMPILER2_PRESENT(+2)) * 4 * K); 4459 4460 os::Solaris::min_stack_allowed = align_size_up(os::Solaris::min_stack_allowed, os::vm_page_size()); 4461 4462 size_t threadStackSizeInBytes = ThreadStackSize * K; 4463 if (threadStackSizeInBytes != 0 && 4464 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 4465 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4466 os::Solaris::min_stack_allowed/K); 4467 return JNI_ERR; 4468 } 4469 4470 // For 64kbps there will be a 64kb page size, which makes 4471 // the usable default stack size quite a bit less. Increase the 4472 // stack for 64kb (or any > than 8kb) pages, this increases 4473 // virtual memory fragmentation (since we're not creating the 4474 // stack on a power of 2 boundary. The real fix for this 4475 // should be to fix the guard page mechanism. 4476 4477 if (vm_page_size() > 8*K) { 4478 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4479 ? threadStackSizeInBytes + 4480 JavaThread::stack_red_zone_size() + 4481 JavaThread::stack_yellow_zone_size() 4482 : 0; 4483 ThreadStackSize = threadStackSizeInBytes/K; 4484 } 4485 4486 // Make the stack size a multiple of the page size so that 4487 // the yellow/red zones can be guarded. 4488 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4489 vm_page_size())); 4490 4491 Solaris::libthread_init(); 4492 4493 if (UseNUMA) { 4494 if (!Solaris::liblgrp_init()) { 4495 UseNUMA = false; 4496 } else { 4497 size_t lgrp_limit = os::numa_get_groups_num(); 4498 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 4499 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4500 FREE_C_HEAP_ARRAY(int, lgrp_ids); 4501 if (lgrp_num < 2) { 4502 // There's only one locality group, disable NUMA. 4503 UseNUMA = false; 4504 } 4505 } 4506 if (!UseNUMA && ForceNUMA) { 4507 UseNUMA = true; 4508 } 4509 } 4510 4511 Solaris::signal_sets_init(); 4512 Solaris::init_signal_mem(); 4513 Solaris::install_signal_handlers(); 4514 4515 if (libjsigversion < JSIG_VERSION_1_4_1) { 4516 Maxlibjsigsigs = OLDMAXSIGNUM; 4517 } 4518 4519 // initialize synchronization primitives to use either thread or 4520 // lwp synchronization (controlled by UseLWPSynchronization) 4521 Solaris::synchronization_init(); 4522 4523 if (MaxFDLimit) { 4524 // set the number of file descriptors to max. print out error 4525 // if getrlimit/setrlimit fails but continue regardless. 4526 struct rlimit nbr_files; 4527 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4528 if (status != 0) { 4529 log_info(os)("os::init_2 getrlimit failed: %s", os::strerror(errno)); 4530 } else { 4531 nbr_files.rlim_cur = nbr_files.rlim_max; 4532 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4533 if (status != 0) { 4534 log_info(os)("os::init_2 setrlimit failed: %s", os::strerror(errno)); 4535 } 4536 } 4537 } 4538 4539 // Calculate theoretical max. size of Threads to guard gainst 4540 // artifical out-of-memory situations, where all available address- 4541 // space has been reserved by thread stacks. Default stack size is 1Mb. 4542 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4543 JavaThread::stack_size_at_create() : (1*K*K); 4544 assert(pre_thread_stack_size != 0, "Must have a stack"); 4545 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4546 // we should start doing Virtual Memory banging. Currently when the threads will 4547 // have used all but 200Mb of space. 4548 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4549 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4550 4551 // at-exit methods are called in the reverse order of their registration. 4552 // In Solaris 7 and earlier, atexit functions are called on return from 4553 // main or as a result of a call to exit(3C). There can be only 32 of 4554 // these functions registered and atexit() does not set errno. In Solaris 4555 // 8 and later, there is no limit to the number of functions registered 4556 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4557 // functions are called upon dlclose(3DL) in addition to return from main 4558 // and exit(3C). 4559 4560 if (PerfAllowAtExitRegistration) { 4561 // only register atexit functions if PerfAllowAtExitRegistration is set. 4562 // atexit functions can be delayed until process exit time, which 4563 // can be problematic for embedded VM situations. Embedded VMs should 4564 // call DestroyJavaVM() to assure that VM resources are released. 4565 4566 // note: perfMemory_exit_helper atexit function may be removed in 4567 // the future if the appropriate cleanup code can be added to the 4568 // VM_Exit VMOperation's doit method. 4569 if (atexit(perfMemory_exit_helper) != 0) { 4570 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4571 } 4572 } 4573 4574 // Init pset_loadavg function pointer 4575 init_pset_getloadavg_ptr(); 4576 4577 return JNI_OK; 4578} 4579 4580// Mark the polling page as unreadable 4581void os::make_polling_page_unreadable(void) { 4582 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) { 4583 fatal("Could not disable polling page"); 4584 } 4585} 4586 4587// Mark the polling page as readable 4588void os::make_polling_page_readable(void) { 4589 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) { 4590 fatal("Could not enable polling page"); 4591 } 4592} 4593 4594// OS interface. 4595 4596bool os::check_heap(bool force) { return true; } 4597 4598// Is a (classpath) directory empty? 4599bool os::dir_is_empty(const char* path) { 4600 DIR *dir = NULL; 4601 struct dirent *ptr; 4602 4603 dir = opendir(path); 4604 if (dir == NULL) return true; 4605 4606 // Scan the directory 4607 bool result = true; 4608 char buf[sizeof(struct dirent) + MAX_PATH]; 4609 struct dirent *dbuf = (struct dirent *) buf; 4610 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4611 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4612 result = false; 4613 } 4614 } 4615 closedir(dir); 4616 return result; 4617} 4618 4619// This code originates from JDK's sysOpen and open64_w 4620// from src/solaris/hpi/src/system_md.c 4621 4622int os::open(const char *path, int oflag, int mode) { 4623 if (strlen(path) > MAX_PATH - 1) { 4624 errno = ENAMETOOLONG; 4625 return -1; 4626 } 4627 int fd; 4628 4629 fd = ::open64(path, oflag, mode); 4630 if (fd == -1) return -1; 4631 4632 // If the open succeeded, the file might still be a directory 4633 { 4634 struct stat64 buf64; 4635 int ret = ::fstat64(fd, &buf64); 4636 int st_mode = buf64.st_mode; 4637 4638 if (ret != -1) { 4639 if ((st_mode & S_IFMT) == S_IFDIR) { 4640 errno = EISDIR; 4641 ::close(fd); 4642 return -1; 4643 } 4644 } else { 4645 ::close(fd); 4646 return -1; 4647 } 4648 } 4649 4650 // 32-bit Solaris systems suffer from: 4651 // 4652 // - an historical default soft limit of 256 per-process file 4653 // descriptors that is too low for many Java programs. 4654 // 4655 // - a design flaw where file descriptors created using stdio 4656 // fopen must be less than 256, _even_ when the first limit above 4657 // has been raised. This can cause calls to fopen (but not calls to 4658 // open, for example) to fail mysteriously, perhaps in 3rd party 4659 // native code (although the JDK itself uses fopen). One can hardly 4660 // criticize them for using this most standard of all functions. 4661 // 4662 // We attempt to make everything work anyways by: 4663 // 4664 // - raising the soft limit on per-process file descriptors beyond 4665 // 256 4666 // 4667 // - As of Solaris 10u4, we can request that Solaris raise the 256 4668 // stdio fopen limit by calling function enable_extended_FILE_stdio. 4669 // This is done in init_2 and recorded in enabled_extended_FILE_stdio 4670 // 4671 // - If we are stuck on an old (pre 10u4) Solaris system, we can 4672 // workaround the bug by remapping non-stdio file descriptors below 4673 // 256 to ones beyond 256, which is done below. 4674 // 4675 // See: 4676 // 1085341: 32-bit stdio routines should support file descriptors >255 4677 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files 4678 // 6431278: Netbeans crash on 32 bit Solaris: need to call 4679 // enable_extended_FILE_stdio() in VM initialisation 4680 // Giri Mandalika's blog 4681 // http://technopark02.blogspot.com/2005_05_01_archive.html 4682 // 4683#ifndef _LP64 4684 if ((!enabled_extended_FILE_stdio) && fd < 256) { 4685 int newfd = ::fcntl(fd, F_DUPFD, 256); 4686 if (newfd != -1) { 4687 ::close(fd); 4688 fd = newfd; 4689 } 4690 } 4691#endif // 32-bit Solaris 4692 4693 // All file descriptors that are opened in the JVM and not 4694 // specifically destined for a subprocess should have the 4695 // close-on-exec flag set. If we don't set it, then careless 3rd 4696 // party native code might fork and exec without closing all 4697 // appropriate file descriptors (e.g. as we do in closeDescriptors in 4698 // UNIXProcess.c), and this in turn might: 4699 // 4700 // - cause end-of-file to fail to be detected on some file 4701 // descriptors, resulting in mysterious hangs, or 4702 // 4703 // - might cause an fopen in the subprocess to fail on a system 4704 // suffering from bug 1085341. 4705 // 4706 // (Yes, the default setting of the close-on-exec flag is a Unix 4707 // design flaw) 4708 // 4709 // See: 4710 // 1085341: 32-bit stdio routines should support file descriptors >255 4711 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed 4712 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 4713 // 4714#ifdef FD_CLOEXEC 4715 { 4716 int flags = ::fcntl(fd, F_GETFD); 4717 if (flags != -1) { 4718 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 4719 } 4720 } 4721#endif 4722 4723 return fd; 4724} 4725 4726// create binary file, rewriting existing file if required 4727int os::create_binary_file(const char* path, bool rewrite_existing) { 4728 int oflags = O_WRONLY | O_CREAT; 4729 if (!rewrite_existing) { 4730 oflags |= O_EXCL; 4731 } 4732 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4733} 4734 4735// return current position of file pointer 4736jlong os::current_file_offset(int fd) { 4737 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4738} 4739 4740// move file pointer to the specified offset 4741jlong os::seek_to_file_offset(int fd, jlong offset) { 4742 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4743} 4744 4745jlong os::lseek(int fd, jlong offset, int whence) { 4746 return (jlong) ::lseek64(fd, offset, whence); 4747} 4748 4749char * os::native_path(char *path) { 4750 return path; 4751} 4752 4753int os::ftruncate(int fd, jlong length) { 4754 return ::ftruncate64(fd, length); 4755} 4756 4757int os::fsync(int fd) { 4758 RESTARTABLE_RETURN_INT(::fsync(fd)); 4759} 4760 4761int os::available(int fd, jlong *bytes) { 4762 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 4763 "Assumed _thread_in_native"); 4764 jlong cur, end; 4765 int mode; 4766 struct stat64 buf64; 4767 4768 if (::fstat64(fd, &buf64) >= 0) { 4769 mode = buf64.st_mode; 4770 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 4771 int n,ioctl_return; 4772 4773 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return); 4774 if (ioctl_return>= 0) { 4775 *bytes = n; 4776 return 1; 4777 } 4778 } 4779 } 4780 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 4781 return 0; 4782 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 4783 return 0; 4784 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 4785 return 0; 4786 } 4787 *bytes = end - cur; 4788 return 1; 4789} 4790 4791// Map a block of memory. 4792char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4793 char *addr, size_t bytes, bool read_only, 4794 bool allow_exec) { 4795 int prot; 4796 int flags; 4797 4798 if (read_only) { 4799 prot = PROT_READ; 4800 flags = MAP_SHARED; 4801 } else { 4802 prot = PROT_READ | PROT_WRITE; 4803 flags = MAP_PRIVATE; 4804 } 4805 4806 if (allow_exec) { 4807 prot |= PROT_EXEC; 4808 } 4809 4810 if (addr != NULL) { 4811 flags |= MAP_FIXED; 4812 } 4813 4814 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4815 fd, file_offset); 4816 if (mapped_address == MAP_FAILED) { 4817 return NULL; 4818 } 4819 return mapped_address; 4820} 4821 4822 4823// Remap a block of memory. 4824char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 4825 char *addr, size_t bytes, bool read_only, 4826 bool allow_exec) { 4827 // same as map_memory() on this OS 4828 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4829 allow_exec); 4830} 4831 4832 4833// Unmap a block of memory. 4834bool os::pd_unmap_memory(char* addr, size_t bytes) { 4835 return munmap(addr, bytes) == 0; 4836} 4837 4838void os::pause() { 4839 char filename[MAX_PATH]; 4840 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4841 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4842 } else { 4843 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4844 } 4845 4846 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4847 if (fd != -1) { 4848 struct stat buf; 4849 ::close(fd); 4850 while (::stat(filename, &buf) == 0) { 4851 (void)::poll(NULL, 0, 100); 4852 } 4853 } else { 4854 jio_fprintf(stderr, 4855 "Could not open pause file '%s', continuing immediately.\n", filename); 4856 } 4857} 4858 4859#ifndef PRODUCT 4860#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4861// Turn this on if you need to trace synch operations. 4862// Set RECORD_SYNCH_LIMIT to a large-enough value, 4863// and call record_synch_enable and record_synch_disable 4864// around the computation of interest. 4865 4866void record_synch(char* name, bool returning); // defined below 4867 4868class RecordSynch { 4869 char* _name; 4870 public: 4871 RecordSynch(char* name) :_name(name) { record_synch(_name, false); } 4872 ~RecordSynch() { record_synch(_name, true); } 4873}; 4874 4875#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 4876extern "C" ret name params { \ 4877 typedef ret name##_t params; \ 4878 static name##_t* implem = NULL; \ 4879 static int callcount = 0; \ 4880 if (implem == NULL) { \ 4881 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 4882 if (implem == NULL) fatal(dlerror()); \ 4883 } \ 4884 ++callcount; \ 4885 RecordSynch _rs(#name); \ 4886 inner; \ 4887 return implem args; \ 4888} 4889// in dbx, examine callcounts this way: 4890// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 4891 4892#define CHECK_POINTER_OK(p) \ 4893 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 4894#define CHECK_MU \ 4895 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 4896#define CHECK_CV \ 4897 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 4898#define CHECK_P(p) \ 4899 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 4900 4901#define CHECK_MUTEX(mutex_op) \ 4902 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 4903 4904CHECK_MUTEX( mutex_lock) 4905CHECK_MUTEX( _mutex_lock) 4906CHECK_MUTEX( mutex_unlock) 4907CHECK_MUTEX(_mutex_unlock) 4908CHECK_MUTEX( mutex_trylock) 4909CHECK_MUTEX(_mutex_trylock) 4910 4911#define CHECK_COND(cond_op) \ 4912 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV); 4913 4914CHECK_COND( cond_wait); 4915CHECK_COND(_cond_wait); 4916CHECK_COND(_cond_wait_cancel); 4917 4918#define CHECK_COND2(cond_op) \ 4919 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV); 4920 4921CHECK_COND2( cond_timedwait); 4922CHECK_COND2(_cond_timedwait); 4923CHECK_COND2(_cond_timedwait_cancel); 4924 4925// do the _lwp_* versions too 4926#define mutex_t lwp_mutex_t 4927#define cond_t lwp_cond_t 4928CHECK_MUTEX( _lwp_mutex_lock) 4929CHECK_MUTEX( _lwp_mutex_unlock) 4930CHECK_MUTEX( _lwp_mutex_trylock) 4931CHECK_MUTEX( __lwp_mutex_lock) 4932CHECK_MUTEX( __lwp_mutex_unlock) 4933CHECK_MUTEX( __lwp_mutex_trylock) 4934CHECK_MUTEX(___lwp_mutex_lock) 4935CHECK_MUTEX(___lwp_mutex_unlock) 4936 4937CHECK_COND( _lwp_cond_wait); 4938CHECK_COND( __lwp_cond_wait); 4939CHECK_COND(___lwp_cond_wait); 4940 4941CHECK_COND2( _lwp_cond_timedwait); 4942CHECK_COND2( __lwp_cond_timedwait); 4943#undef mutex_t 4944#undef cond_t 4945 4946CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4947CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4948CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 4949CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 4950CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4951CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4952CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4953CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4954 4955 4956// recording machinery: 4957 4958enum { RECORD_SYNCH_LIMIT = 200 }; 4959char* record_synch_name[RECORD_SYNCH_LIMIT]; 4960void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 4961bool record_synch_returning[RECORD_SYNCH_LIMIT]; 4962thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 4963int record_synch_count = 0; 4964bool record_synch_enabled = false; 4965 4966// in dbx, examine recorded data this way: 4967// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 4968 4969void record_synch(char* name, bool returning) { 4970 if (record_synch_enabled) { 4971 if (record_synch_count < RECORD_SYNCH_LIMIT) { 4972 record_synch_name[record_synch_count] = name; 4973 record_synch_returning[record_synch_count] = returning; 4974 record_synch_thread[record_synch_count] = thr_self(); 4975 record_synch_arg0ptr[record_synch_count] = &name; 4976 record_synch_count++; 4977 } 4978 // put more checking code here: 4979 // ... 4980 } 4981} 4982 4983void record_synch_enable() { 4984 // start collecting trace data, if not already doing so 4985 if (!record_synch_enabled) record_synch_count = 0; 4986 record_synch_enabled = true; 4987} 4988 4989void record_synch_disable() { 4990 // stop collecting trace data 4991 record_synch_enabled = false; 4992} 4993 4994#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4995#endif // PRODUCT 4996 4997const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 4998const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 4999 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5000 5001 5002// JVMTI & JVM monitoring and management support 5003// The thread_cpu_time() and current_thread_cpu_time() are only 5004// supported if is_thread_cpu_time_supported() returns true. 5005// They are not supported on Solaris T1. 5006 5007// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5008// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5009// of a thread. 5010// 5011// current_thread_cpu_time() and thread_cpu_time(Thread *) 5012// returns the fast estimate available on the platform. 5013 5014// hrtime_t gethrvtime() return value includes 5015// user time but does not include system time 5016jlong os::current_thread_cpu_time() { 5017 return (jlong) gethrvtime(); 5018} 5019 5020jlong os::thread_cpu_time(Thread *thread) { 5021 // return user level CPU time only to be consistent with 5022 // what current_thread_cpu_time returns. 5023 // thread_cpu_time_info() must be changed if this changes 5024 return os::thread_cpu_time(thread, false /* user time only */); 5025} 5026 5027jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5028 if (user_sys_cpu_time) { 5029 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5030 } else { 5031 return os::current_thread_cpu_time(); 5032 } 5033} 5034 5035jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5036 char proc_name[64]; 5037 int count; 5038 prusage_t prusage; 5039 jlong lwp_time; 5040 int fd; 5041 5042 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5043 getpid(), 5044 thread->osthread()->lwp_id()); 5045 fd = ::open(proc_name, O_RDONLY); 5046 if (fd == -1) return -1; 5047 5048 do { 5049 count = ::pread(fd, 5050 (void *)&prusage.pr_utime, 5051 thr_time_size, 5052 thr_time_off); 5053 } while (count < 0 && errno == EINTR); 5054 ::close(fd); 5055 if (count < 0) return -1; 5056 5057 if (user_sys_cpu_time) { 5058 // user + system CPU time 5059 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5060 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5061 (jlong)prusage.pr_stime.tv_nsec + 5062 (jlong)prusage.pr_utime.tv_nsec; 5063 } else { 5064 // user level CPU time only 5065 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5066 (jlong)prusage.pr_utime.tv_nsec; 5067 } 5068 5069 return (lwp_time); 5070} 5071 5072void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5073 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5074 info_ptr->may_skip_backward = false; // elapsed time not wall time 5075 info_ptr->may_skip_forward = false; // elapsed time not wall time 5076 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5077} 5078 5079void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5080 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5081 info_ptr->may_skip_backward = false; // elapsed time not wall time 5082 info_ptr->may_skip_forward = false; // elapsed time not wall time 5083 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5084} 5085 5086bool os::is_thread_cpu_time_supported() { 5087 return true; 5088} 5089 5090// System loadavg support. Returns -1 if load average cannot be obtained. 5091// Return the load average for our processor set if the primitive exists 5092// (Solaris 9 and later). Otherwise just return system wide loadavg. 5093int os::loadavg(double loadavg[], int nelem) { 5094 if (pset_getloadavg_ptr != NULL) { 5095 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5096 } else { 5097 return ::getloadavg(loadavg, nelem); 5098 } 5099} 5100 5101//--------------------------------------------------------------------------------- 5102 5103bool os::find(address addr, outputStream* st) { 5104 Dl_info dlinfo; 5105 memset(&dlinfo, 0, sizeof(dlinfo)); 5106 if (dladdr(addr, &dlinfo) != 0) { 5107 st->print(PTR_FORMAT ": ", addr); 5108 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 5109 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5110 } else if (dlinfo.dli_fbase != NULL) { 5111 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5112 } else { 5113 st->print("<absolute address>"); 5114 } 5115 if (dlinfo.dli_fname != NULL) { 5116 st->print(" in %s", dlinfo.dli_fname); 5117 } 5118 if (dlinfo.dli_fbase != NULL) { 5119 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 5120 } 5121 st->cr(); 5122 5123 if (Verbose) { 5124 // decode some bytes around the PC 5125 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 5126 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 5127 address lowest = (address) dlinfo.dli_sname; 5128 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5129 if (begin < lowest) begin = lowest; 5130 Dl_info dlinfo2; 5131 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 5132 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) { 5133 end = (address) dlinfo2.dli_saddr; 5134 } 5135 Disassembler::decode(begin, end, st); 5136 } 5137 return true; 5138 } 5139 return false; 5140} 5141 5142// Following function has been added to support HotSparc's libjvm.so running 5143// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5144// src/solaris/hpi/native_threads in the EVM codebase. 5145// 5146// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5147// libraries and should thus be removed. We will leave it behind for a while 5148// until we no longer want to able to run on top of 1.3.0 Solaris production 5149// JDK. See 4341971. 5150 5151#define STACK_SLACK 0x800 5152 5153extern "C" { 5154 intptr_t sysThreadAvailableStackWithSlack() { 5155 stack_t st; 5156 intptr_t retval, stack_top; 5157 retval = thr_stksegment(&st); 5158 assert(retval == 0, "incorrect return value from thr_stksegment"); 5159 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5160 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5161 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5162 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5163 } 5164} 5165 5166// ObjectMonitor park-unpark infrastructure ... 5167// 5168// We implement Solaris and Linux PlatformEvents with the 5169// obvious condvar-mutex-flag triple. 5170// Another alternative that works quite well is pipes: 5171// Each PlatformEvent consists of a pipe-pair. 5172// The thread associated with the PlatformEvent 5173// calls park(), which reads from the input end of the pipe. 5174// Unpark() writes into the other end of the pipe. 5175// The write-side of the pipe must be set NDELAY. 5176// Unfortunately pipes consume a large # of handles. 5177// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5178// Using pipes for the 1st few threads might be workable, however. 5179// 5180// park() is permitted to return spuriously. 5181// Callers of park() should wrap the call to park() in 5182// an appropriate loop. A litmus test for the correct 5183// usage of park is the following: if park() were modified 5184// to immediately return 0 your code should still work, 5185// albeit degenerating to a spin loop. 5186// 5187// In a sense, park()-unpark() just provides more polite spinning 5188// and polling with the key difference over naive spinning being 5189// that a parked thread needs to be explicitly unparked() in order 5190// to wake up and to poll the underlying condition. 5191// 5192// Assumption: 5193// Only one parker can exist on an event, which is why we allocate 5194// them per-thread. Multiple unparkers can coexist. 5195// 5196// _Event transitions in park() 5197// -1 => -1 : illegal 5198// 1 => 0 : pass - return immediately 5199// 0 => -1 : block; then set _Event to 0 before returning 5200// 5201// _Event transitions in unpark() 5202// 0 => 1 : just return 5203// 1 => 1 : just return 5204// -1 => either 0 or 1; must signal target thread 5205// That is, we can safely transition _Event from -1 to either 5206// 0 or 1. 5207// 5208// _Event serves as a restricted-range semaphore. 5209// -1 : thread is blocked, i.e. there is a waiter 5210// 0 : neutral: thread is running or ready, 5211// could have been signaled after a wait started 5212// 1 : signaled - thread is running or ready 5213// 5214// Another possible encoding of _Event would be with 5215// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5216// 5217// TODO-FIXME: add DTRACE probes for: 5218// 1. Tx parks 5219// 2. Ty unparks Tx 5220// 3. Tx resumes from park 5221 5222 5223// value determined through experimentation 5224#define ROUNDINGFIX 11 5225 5226// utility to compute the abstime argument to timedwait. 5227// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5228 5229static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5230 // millis is the relative timeout time 5231 // abstime will be the absolute timeout time 5232 if (millis < 0) millis = 0; 5233 struct timeval now; 5234 int status = gettimeofday(&now, NULL); 5235 assert(status == 0, "gettimeofday"); 5236 jlong seconds = millis / 1000; 5237 jlong max_wait_period; 5238 5239 if (UseLWPSynchronization) { 5240 // forward port of fix for 4275818 (not sleeping long enough) 5241 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5242 // _lwp_cond_timedwait() used a round_down algorithm rather 5243 // than a round_up. For millis less than our roundfactor 5244 // it rounded down to 0 which doesn't meet the spec. 5245 // For millis > roundfactor we may return a bit sooner, but 5246 // since we can not accurately identify the patch level and 5247 // this has already been fixed in Solaris 9 and 8 we will 5248 // leave it alone rather than always rounding down. 5249 5250 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5251 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5252 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5253 max_wait_period = 21000000; 5254 } else { 5255 max_wait_period = 50000000; 5256 } 5257 millis %= 1000; 5258 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5259 seconds = max_wait_period; 5260 } 5261 abstime->tv_sec = now.tv_sec + seconds; 5262 long usec = now.tv_usec + millis * 1000; 5263 if (usec >= 1000000) { 5264 abstime->tv_sec += 1; 5265 usec -= 1000000; 5266 } 5267 abstime->tv_nsec = usec * 1000; 5268 return abstime; 5269} 5270 5271void os::PlatformEvent::park() { // AKA: down() 5272 // Transitions for _Event: 5273 // -1 => -1 : illegal 5274 // 1 => 0 : pass - return immediately 5275 // 0 => -1 : block; then set _Event to 0 before returning 5276 5277 // Invariant: Only the thread associated with the Event/PlatformEvent 5278 // may call park(). 5279 assert(_nParked == 0, "invariant"); 5280 5281 int v; 5282 for (;;) { 5283 v = _Event; 5284 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5285 } 5286 guarantee(v >= 0, "invariant"); 5287 if (v == 0) { 5288 // Do this the hard way by blocking ... 5289 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5290 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5291 // Only for SPARC >= V8PlusA 5292#if defined(__sparc) && defined(COMPILER2) 5293 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5294#endif 5295 int status = os::Solaris::mutex_lock(_mutex); 5296 assert_status(status == 0, status, "mutex_lock"); 5297 guarantee(_nParked == 0, "invariant"); 5298 ++_nParked; 5299 while (_Event < 0) { 5300 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5301 // Treat this the same as if the wait was interrupted 5302 // With usr/lib/lwp going to kernel, always handle ETIME 5303 status = os::Solaris::cond_wait(_cond, _mutex); 5304 if (status == ETIME) status = EINTR; 5305 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5306 } 5307 --_nParked; 5308 _Event = 0; 5309 status = os::Solaris::mutex_unlock(_mutex); 5310 assert_status(status == 0, status, "mutex_unlock"); 5311 // Paranoia to ensure our locked and lock-free paths interact 5312 // correctly with each other. 5313 OrderAccess::fence(); 5314 } 5315} 5316 5317int os::PlatformEvent::park(jlong millis) { 5318 // Transitions for _Event: 5319 // -1 => -1 : illegal 5320 // 1 => 0 : pass - return immediately 5321 // 0 => -1 : block; then set _Event to 0 before returning 5322 5323 guarantee(_nParked == 0, "invariant"); 5324 int v; 5325 for (;;) { 5326 v = _Event; 5327 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5328 } 5329 guarantee(v >= 0, "invariant"); 5330 if (v != 0) return OS_OK; 5331 5332 int ret = OS_TIMEOUT; 5333 timestruc_t abst; 5334 compute_abstime(&abst, millis); 5335 5336 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5337 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5338 // Only for SPARC >= V8PlusA 5339#if defined(__sparc) && defined(COMPILER2) 5340 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5341#endif 5342 int status = os::Solaris::mutex_lock(_mutex); 5343 assert_status(status == 0, status, "mutex_lock"); 5344 guarantee(_nParked == 0, "invariant"); 5345 ++_nParked; 5346 while (_Event < 0) { 5347 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5348 assert_status(status == 0 || status == EINTR || 5349 status == ETIME || status == ETIMEDOUT, 5350 status, "cond_timedwait"); 5351 if (!FilterSpuriousWakeups) break; // previous semantics 5352 if (status == ETIME || status == ETIMEDOUT) break; 5353 // We consume and ignore EINTR and spurious wakeups. 5354 } 5355 --_nParked; 5356 if (_Event >= 0) ret = OS_OK; 5357 _Event = 0; 5358 status = os::Solaris::mutex_unlock(_mutex); 5359 assert_status(status == 0, status, "mutex_unlock"); 5360 // Paranoia to ensure our locked and lock-free paths interact 5361 // correctly with each other. 5362 OrderAccess::fence(); 5363 return ret; 5364} 5365 5366void os::PlatformEvent::unpark() { 5367 // Transitions for _Event: 5368 // 0 => 1 : just return 5369 // 1 => 1 : just return 5370 // -1 => either 0 or 1; must signal target thread 5371 // That is, we can safely transition _Event from -1 to either 5372 // 0 or 1. 5373 // See also: "Semaphores in Plan 9" by Mullender & Cox 5374 // 5375 // Note: Forcing a transition from "-1" to "1" on an unpark() means 5376 // that it will take two back-to-back park() calls for the owning 5377 // thread to block. This has the benefit of forcing a spurious return 5378 // from the first park() call after an unpark() call which will help 5379 // shake out uses of park() and unpark() without condition variables. 5380 5381 if (Atomic::xchg(1, &_Event) >= 0) return; 5382 5383 // If the thread associated with the event was parked, wake it. 5384 // Wait for the thread assoc with the PlatformEvent to vacate. 5385 int status = os::Solaris::mutex_lock(_mutex); 5386 assert_status(status == 0, status, "mutex_lock"); 5387 int AnyWaiters = _nParked; 5388 status = os::Solaris::mutex_unlock(_mutex); 5389 assert_status(status == 0, status, "mutex_unlock"); 5390 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 5391 if (AnyWaiters != 0) { 5392 // Note that we signal() *after* dropping the lock for "immortal" Events. 5393 // This is safe and avoids a common class of futile wakeups. In rare 5394 // circumstances this can cause a thread to return prematurely from 5395 // cond_{timed}wait() but the spurious wakeup is benign and the victim 5396 // will simply re-test the condition and re-park itself. 5397 // This provides particular benefit if the underlying platform does not 5398 // provide wait morphing. 5399 status = os::Solaris::cond_signal(_cond); 5400 assert_status(status == 0, status, "cond_signal"); 5401 } 5402} 5403 5404// JSR166 5405// ------------------------------------------------------- 5406 5407// The solaris and linux implementations of park/unpark are fairly 5408// conservative for now, but can be improved. They currently use a 5409// mutex/condvar pair, plus _counter. 5410// Park decrements _counter if > 0, else does a condvar wait. Unpark 5411// sets count to 1 and signals condvar. Only one thread ever waits 5412// on the condvar. Contention seen when trying to park implies that someone 5413// is unparking you, so don't wait. And spurious returns are fine, so there 5414// is no need to track notifications. 5415 5416#define MAX_SECS 100000000 5417 5418// This code is common to linux and solaris and will be moved to a 5419// common place in dolphin. 5420// 5421// The passed in time value is either a relative time in nanoseconds 5422// or an absolute time in milliseconds. Either way it has to be unpacked 5423// into suitable seconds and nanoseconds components and stored in the 5424// given timespec structure. 5425// Given time is a 64-bit value and the time_t used in the timespec is only 5426// a signed-32-bit value (except on 64-bit Linux) we have to watch for 5427// overflow if times way in the future are given. Further on Solaris versions 5428// prior to 10 there is a restriction (see cond_timedwait) that the specified 5429// number of seconds, in abstime, is less than current_time + 100,000,000. 5430// As it will be 28 years before "now + 100000000" will overflow we can 5431// ignore overflow and just impose a hard-limit on seconds using the value 5432// of "now + 100,000,000". This places a limit on the timeout of about 3.17 5433// years from "now". 5434// 5435static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5436 assert(time > 0, "convertTime"); 5437 5438 struct timeval now; 5439 int status = gettimeofday(&now, NULL); 5440 assert(status == 0, "gettimeofday"); 5441 5442 time_t max_secs = now.tv_sec + MAX_SECS; 5443 5444 if (isAbsolute) { 5445 jlong secs = time / 1000; 5446 if (secs > max_secs) { 5447 absTime->tv_sec = max_secs; 5448 } else { 5449 absTime->tv_sec = secs; 5450 } 5451 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5452 } else { 5453 jlong secs = time / NANOSECS_PER_SEC; 5454 if (secs >= MAX_SECS) { 5455 absTime->tv_sec = max_secs; 5456 absTime->tv_nsec = 0; 5457 } else { 5458 absTime->tv_sec = now.tv_sec + secs; 5459 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5460 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5461 absTime->tv_nsec -= NANOSECS_PER_SEC; 5462 ++absTime->tv_sec; // note: this must be <= max_secs 5463 } 5464 } 5465 } 5466 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5467 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5468 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5469 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5470} 5471 5472void Parker::park(bool isAbsolute, jlong time) { 5473 // Ideally we'd do something useful while spinning, such 5474 // as calling unpackTime(). 5475 5476 // Optional fast-path check: 5477 // Return immediately if a permit is available. 5478 // We depend on Atomic::xchg() having full barrier semantics 5479 // since we are doing a lock-free update to _counter. 5480 if (Atomic::xchg(0, &_counter) > 0) return; 5481 5482 // Optional fast-exit: Check interrupt before trying to wait 5483 Thread* thread = Thread::current(); 5484 assert(thread->is_Java_thread(), "Must be JavaThread"); 5485 JavaThread *jt = (JavaThread *)thread; 5486 if (Thread::is_interrupted(thread, false)) { 5487 return; 5488 } 5489 5490 // First, demultiplex/decode time arguments 5491 timespec absTime; 5492 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all 5493 return; 5494 } 5495 if (time > 0) { 5496 // Warning: this code might be exposed to the old Solaris time 5497 // round-down bugs. Grep "roundingFix" for details. 5498 unpackTime(&absTime, isAbsolute, time); 5499 } 5500 5501 // Enter safepoint region 5502 // Beware of deadlocks such as 6317397. 5503 // The per-thread Parker:: _mutex is a classic leaf-lock. 5504 // In particular a thread must never block on the Threads_lock while 5505 // holding the Parker:: mutex. If safepoints are pending both the 5506 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5507 ThreadBlockInVM tbivm(jt); 5508 5509 // Don't wait if cannot get lock since interference arises from 5510 // unblocking. Also. check interrupt before trying wait 5511 if (Thread::is_interrupted(thread, false) || 5512 os::Solaris::mutex_trylock(_mutex) != 0) { 5513 return; 5514 } 5515 5516 int status; 5517 5518 if (_counter > 0) { // no wait needed 5519 _counter = 0; 5520 status = os::Solaris::mutex_unlock(_mutex); 5521 assert(status == 0, "invariant"); 5522 // Paranoia to ensure our locked and lock-free paths interact 5523 // correctly with each other and Java-level accesses. 5524 OrderAccess::fence(); 5525 return; 5526 } 5527 5528#ifdef ASSERT 5529 // Don't catch signals while blocked; let the running threads have the signals. 5530 // (This allows a debugger to break into the running thread.) 5531 sigset_t oldsigs; 5532 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5533 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5534#endif 5535 5536 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5537 jt->set_suspend_equivalent(); 5538 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5539 5540 // Do this the hard way by blocking ... 5541 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5542 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5543 // Only for SPARC >= V8PlusA 5544#if defined(__sparc) && defined(COMPILER2) 5545 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5546#endif 5547 5548 if (time == 0) { 5549 status = os::Solaris::cond_wait(_cond, _mutex); 5550 } else { 5551 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5552 } 5553 // Note that an untimed cond_wait() can sometimes return ETIME on older 5554 // versions of the Solaris. 5555 assert_status(status == 0 || status == EINTR || 5556 status == ETIME || status == ETIMEDOUT, 5557 status, "cond_timedwait"); 5558 5559#ifdef ASSERT 5560 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); 5561#endif 5562 _counter = 0; 5563 status = os::Solaris::mutex_unlock(_mutex); 5564 assert_status(status == 0, status, "mutex_unlock"); 5565 // Paranoia to ensure our locked and lock-free paths interact 5566 // correctly with each other and Java-level accesses. 5567 OrderAccess::fence(); 5568 5569 // If externally suspended while waiting, re-suspend 5570 if (jt->handle_special_suspend_equivalent_condition()) { 5571 jt->java_suspend_self(); 5572 } 5573} 5574 5575void Parker::unpark() { 5576 int status = os::Solaris::mutex_lock(_mutex); 5577 assert(status == 0, "invariant"); 5578 const int s = _counter; 5579 _counter = 1; 5580 status = os::Solaris::mutex_unlock(_mutex); 5581 assert(status == 0, "invariant"); 5582 5583 if (s < 1) { 5584 status = os::Solaris::cond_signal(_cond); 5585 assert(status == 0, "invariant"); 5586 } 5587} 5588 5589extern char** environ; 5590 5591// Run the specified command in a separate process. Return its exit value, 5592// or -1 on failure (e.g. can't fork a new process). 5593// Unlike system(), this function can be called from signal handler. It 5594// doesn't block SIGINT et al. 5595int os::fork_and_exec(char* cmd) { 5596 char * argv[4]; 5597 argv[0] = (char *)"sh"; 5598 argv[1] = (char *)"-c"; 5599 argv[2] = cmd; 5600 argv[3] = NULL; 5601 5602 // fork is async-safe, fork1 is not so can't use in signal handler 5603 pid_t pid; 5604 Thread* t = Thread::current_or_null_safe(); 5605 if (t != NULL && t->is_inside_signal_handler()) { 5606 pid = fork(); 5607 } else { 5608 pid = fork1(); 5609 } 5610 5611 if (pid < 0) { 5612 // fork failed 5613 warning("fork failed: %s", os::strerror(errno)); 5614 return -1; 5615 5616 } else if (pid == 0) { 5617 // child process 5618 5619 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5620 execve("/usr/bin/sh", argv, environ); 5621 5622 // execve failed 5623 _exit(-1); 5624 5625 } else { 5626 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5627 // care about the actual exit code, for now. 5628 5629 int status; 5630 5631 // Wait for the child process to exit. This returns immediately if 5632 // the child has already exited. */ 5633 while (waitpid(pid, &status, 0) < 0) { 5634 switch (errno) { 5635 case ECHILD: return 0; 5636 case EINTR: break; 5637 default: return -1; 5638 } 5639 } 5640 5641 if (WIFEXITED(status)) { 5642 // The child exited normally; get its exit code. 5643 return WEXITSTATUS(status); 5644 } else if (WIFSIGNALED(status)) { 5645 // The child exited because of a signal 5646 // The best value to return is 0x80 + signal number, 5647 // because that is what all Unix shells do, and because 5648 // it allows callers to distinguish between process exit and 5649 // process death by signal. 5650 return 0x80 + WTERMSIG(status); 5651 } else { 5652 // Unknown exit code; pass it through 5653 return status; 5654 } 5655 } 5656} 5657 5658// is_headless_jre() 5659// 5660// Test for the existence of xawt/libmawt.so or libawt_xawt.so 5661// in order to report if we are running in a headless jre 5662// 5663// Since JDK8 xawt/libmawt.so was moved into the same directory 5664// as libawt.so, and renamed libawt_xawt.so 5665// 5666bool os::is_headless_jre() { 5667 struct stat statbuf; 5668 char buf[MAXPATHLEN]; 5669 char libmawtpath[MAXPATHLEN]; 5670 const char *xawtstr = "/xawt/libmawt.so"; 5671 const char *new_xawtstr = "/libawt_xawt.so"; 5672 char *p; 5673 5674 // Get path to libjvm.so 5675 os::jvm_path(buf, sizeof(buf)); 5676 5677 // Get rid of libjvm.so 5678 p = strrchr(buf, '/'); 5679 if (p == NULL) { 5680 return false; 5681 } else { 5682 *p = '\0'; 5683 } 5684 5685 // Get rid of client or server 5686 p = strrchr(buf, '/'); 5687 if (p == NULL) { 5688 return false; 5689 } else { 5690 *p = '\0'; 5691 } 5692 5693 // check xawt/libmawt.so 5694 strcpy(libmawtpath, buf); 5695 strcat(libmawtpath, xawtstr); 5696 if (::stat(libmawtpath, &statbuf) == 0) return false; 5697 5698 // check libawt_xawt.so 5699 strcpy(libmawtpath, buf); 5700 strcat(libmawtpath, new_xawtstr); 5701 if (::stat(libmawtpath, &statbuf) == 0) return false; 5702 5703 return true; 5704} 5705 5706size_t os::write(int fd, const void *buf, unsigned int nBytes) { 5707 size_t res; 5708 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 5709 return res; 5710} 5711 5712int os::close(int fd) { 5713 return ::close(fd); 5714} 5715 5716int os::socket_close(int fd) { 5717 return ::close(fd); 5718} 5719 5720int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 5721 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5722 "Assumed _thread_in_native"); 5723 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags)); 5724} 5725 5726int os::send(int fd, char* buf, size_t nBytes, uint flags) { 5727 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5728 "Assumed _thread_in_native"); 5729 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5730} 5731 5732int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 5733 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5734} 5735 5736// As both poll and select can be interrupted by signals, we have to be 5737// prepared to restart the system call after updating the timeout, unless 5738// a poll() is done with timeout == -1, in which case we repeat with this 5739// "wait forever" value. 5740 5741int os::connect(int fd, struct sockaddr *him, socklen_t len) { 5742 int _result; 5743 _result = ::connect(fd, him, len); 5744 5745 // On Solaris, when a connect() call is interrupted, the connection 5746 // can be established asynchronously (see 6343810). Subsequent calls 5747 // to connect() must check the errno value which has the semantic 5748 // described below (copied from the connect() man page). Handling 5749 // of asynchronously established connections is required for both 5750 // blocking and non-blocking sockets. 5751 // EINTR The connection attempt was interrupted 5752 // before any data arrived by the delivery of 5753 // a signal. The connection, however, will be 5754 // established asynchronously. 5755 // 5756 // EINPROGRESS The socket is non-blocking, and the connec- 5757 // tion cannot be completed immediately. 5758 // 5759 // EALREADY The socket is non-blocking, and a previous 5760 // connection attempt has not yet been com- 5761 // pleted. 5762 // 5763 // EISCONN The socket is already connected. 5764 if (_result == OS_ERR && errno == EINTR) { 5765 // restarting a connect() changes its errno semantics 5766 RESTARTABLE(::connect(fd, him, len), _result); 5767 // undo these changes 5768 if (_result == OS_ERR) { 5769 if (errno == EALREADY) { 5770 errno = EINPROGRESS; // fall through 5771 } else if (errno == EISCONN) { 5772 errno = 0; 5773 return OS_OK; 5774 } 5775 } 5776 } 5777 return _result; 5778} 5779 5780// Get the default path to the core file 5781// Returns the length of the string 5782int os::get_core_path(char* buffer, size_t bufferSize) { 5783 const char* p = get_current_directory(buffer, bufferSize); 5784 5785 if (p == NULL) { 5786 assert(p != NULL, "failed to get current directory"); 5787 return 0; 5788 } 5789 5790 jio_snprintf(buffer, bufferSize, "%s/core or core.%d", 5791 p, current_process_id()); 5792 5793 return strlen(buffer); 5794} 5795 5796#ifndef PRODUCT 5797void TestReserveMemorySpecial_test() { 5798 // No tests available for this platform 5799} 5800#endif 5801 5802bool os::start_debugging(char *buf, int buflen) { 5803 int len = (int)strlen(buf); 5804 char *p = &buf[len]; 5805 5806 jio_snprintf(p, buflen-len, 5807 "\n\n" 5808 "Do you want to debug the problem?\n\n" 5809 "To debug, run 'dbx - %d'; then switch to thread " INTX_FORMAT "\n" 5810 "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n" 5811 "Otherwise, press RETURN to abort...", 5812 os::current_process_id(), os::current_thread_id()); 5813 5814 bool yes = os::message_box("Unexpected Error", buf); 5815 5816 if (yes) { 5817 // yes, user asked VM to launch debugger 5818 jio_snprintf(buf, sizeof(buf), "dbx - %d", os::current_process_id()); 5819 5820 os::fork_and_exec(buf); 5821 yes = false; 5822 } 5823 return yes; 5824} 5825