os_solaris.cpp revision 9639:f0dcbc6e99b1
1/* 2 * Copyright (c) 1997, 2015, 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 "memory/allocation.inline.hpp" 36#include "memory/filemap.hpp" 37#include "mutex_solaris.inline.hpp" 38#include "oops/oop.inline.hpp" 39#include "os_share_solaris.hpp" 40#include "os_solaris.inline.hpp" 41#include "prims/jniFastGetField.hpp" 42#include "prims/jvm.h" 43#include "prims/jvm_misc.hpp" 44#include "runtime/arguments.hpp" 45#include "runtime/atomic.inline.hpp" 46#include "runtime/extendedPC.hpp" 47#include "runtime/globals.hpp" 48#include "runtime/interfaceSupport.hpp" 49#include "runtime/java.hpp" 50#include "runtime/javaCalls.hpp" 51#include "runtime/mutexLocker.hpp" 52#include "runtime/objectMonitor.hpp" 53#include "runtime/orderAccess.inline.hpp" 54#include "runtime/osThread.hpp" 55#include "runtime/perfMemory.hpp" 56#include "runtime/sharedRuntime.hpp" 57#include "runtime/statSampler.hpp" 58#include "runtime/stubRoutines.hpp" 59#include "runtime/thread.inline.hpp" 60#include "runtime/threadCritical.hpp" 61#include "runtime/timer.hpp" 62#include "runtime/vm_version.hpp" 63#include "semaphore_posix.hpp" 64#include "services/attachListener.hpp" 65#include "services/memTracker.hpp" 66#include "services/runtimeService.hpp" 67#include "utilities/decoder.hpp" 68#include "utilities/defaultStream.hpp" 69#include "utilities/events.hpp" 70#include "utilities/growableArray.hpp" 71#include "utilities/vmError.hpp" 72 73// put OS-includes here 74# include <dlfcn.h> 75# include <errno.h> 76# include <exception> 77# include <link.h> 78# include <poll.h> 79# include <pthread.h> 80# include <pwd.h> 81# include <schedctl.h> 82# include <setjmp.h> 83# include <signal.h> 84# include <stdio.h> 85# include <alloca.h> 86# include <sys/filio.h> 87# include <sys/ipc.h> 88# include <sys/lwp.h> 89# include <sys/machelf.h> // for elf Sym structure used by dladdr1 90# include <sys/mman.h> 91# include <sys/processor.h> 92# include <sys/procset.h> 93# include <sys/pset.h> 94# include <sys/resource.h> 95# include <sys/shm.h> 96# include <sys/socket.h> 97# include <sys/stat.h> 98# include <sys/systeminfo.h> 99# include <sys/time.h> 100# include <sys/times.h> 101# include <sys/types.h> 102# include <sys/wait.h> 103# include <sys/utsname.h> 104# include <thread.h> 105# include <unistd.h> 106# include <sys/priocntl.h> 107# include <sys/rtpriocntl.h> 108# include <sys/tspriocntl.h> 109# include <sys/iapriocntl.h> 110# include <sys/fxpriocntl.h> 111# include <sys/loadavg.h> 112# include <string.h> 113# include <stdio.h> 114 115# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 116# include <sys/procfs.h> // see comment in <sys/procfs.h> 117 118#define MAX_PATH (2 * K) 119 120// for timer info max values which include all bits 121#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 122 123 124// Here are some liblgrp types from sys/lgrp_user.h to be able to 125// compile on older systems without this header file. 126 127#ifndef MADV_ACCESS_LWP 128 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 129#endif 130#ifndef MADV_ACCESS_MANY 131 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 132#endif 133 134#ifndef LGRP_RSRC_CPU 135 #define LGRP_RSRC_CPU 0 /* CPU resources */ 136#endif 137#ifndef LGRP_RSRC_MEM 138 #define LGRP_RSRC_MEM 1 /* memory resources */ 139#endif 140 141// Values for ThreadPriorityPolicy == 1 142int prio_policy1[CriticalPriority+1] = { 143 -99999, 0, 16, 32, 48, 64, 144 80, 96, 112, 124, 127, 127 }; 145 146// System parameters used internally 147static clock_t clock_tics_per_sec = 100; 148 149// Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 150static bool enabled_extended_FILE_stdio = false; 151 152// For diagnostics to print a message once. see run_periodic_checks 153static bool check_addr0_done = false; 154static sigset_t check_signal_done; 155static bool check_signals = true; 156 157address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 158address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 159 160address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 161 162 163// "default" initializers for missing libc APIs 164extern "C" { 165 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 166 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 167 168 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 169 static int lwp_cond_destroy(cond_t *cv) { return 0; } 170} 171 172// "default" initializers for pthread-based synchronization 173extern "C" { 174 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 175 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 176} 177 178static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); 179 180static inline size_t adjust_stack_size(address base, size_t size) { 181 if ((ssize_t)size < 0) { 182 // 4759953: Compensate for ridiculous stack size. 183 size = max_intx; 184 } 185 if (size > (size_t)base) { 186 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 187 size = (size_t)base; 188 } 189 return size; 190} 191 192static inline stack_t get_stack_info() { 193 stack_t st; 194 int retval = thr_stksegment(&st); 195 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 196 assert(retval == 0, "incorrect return value from thr_stksegment"); 197 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 198 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 199 return st; 200} 201 202address os::current_stack_base() { 203 int r = thr_main(); 204 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 205 bool is_primordial_thread = r; 206 207 // Workaround 4352906, avoid calls to thr_stksegment by 208 // thr_main after the first one (it looks like we trash 209 // some data, causing the value for ss_sp to be incorrect). 210 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 211 stack_t st = get_stack_info(); 212 if (is_primordial_thread) { 213 // cache initial value of stack base 214 os::Solaris::_main_stack_base = (address)st.ss_sp; 215 } 216 return (address)st.ss_sp; 217 } else { 218 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 219 return os::Solaris::_main_stack_base; 220 } 221} 222 223size_t os::current_stack_size() { 224 size_t size; 225 226 int r = thr_main(); 227 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 228 if (!r) { 229 size = get_stack_info().ss_size; 230 } else { 231 struct rlimit limits; 232 getrlimit(RLIMIT_STACK, &limits); 233 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 234 } 235 // base may not be page aligned 236 address base = current_stack_base(); 237 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 238 return (size_t)(base - bottom); 239} 240 241struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 242 return localtime_r(clock, res); 243} 244 245void os::Solaris::try_enable_extended_io() { 246 typedef int (*enable_extended_FILE_stdio_t)(int, int); 247 248 if (!UseExtendedFileIO) { 249 return; 250 } 251 252 enable_extended_FILE_stdio_t enabler = 253 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 254 "enable_extended_FILE_stdio"); 255 if (enabler) { 256 enabler(-1, -1); 257 } 258} 259 260static int _processors_online = 0; 261 262jint os::Solaris::_os_thread_limit = 0; 263volatile jint os::Solaris::_os_thread_count = 0; 264 265julong os::available_memory() { 266 return Solaris::available_memory(); 267} 268 269julong os::Solaris::available_memory() { 270 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 271} 272 273julong os::Solaris::_physical_memory = 0; 274 275julong os::physical_memory() { 276 return Solaris::physical_memory(); 277} 278 279static hrtime_t first_hrtime = 0; 280static const hrtime_t hrtime_hz = 1000*1000*1000; 281static volatile hrtime_t max_hrtime = 0; 282 283 284void os::Solaris::initialize_system_info() { 285 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 286 _processors_online = sysconf(_SC_NPROCESSORS_ONLN); 287 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * 288 (julong)sysconf(_SC_PAGESIZE); 289} 290 291int os::active_processor_count() { 292 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 293 pid_t pid = getpid(); 294 psetid_t pset = PS_NONE; 295 // Are we running in a processor set or is there any processor set around? 296 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 297 uint_t pset_cpus; 298 // Query the number of cpus available to us. 299 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 300 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 301 _processors_online = pset_cpus; 302 return pset_cpus; 303 } 304 } 305 // Otherwise return number of online cpus 306 return online_cpus; 307} 308 309static bool find_processors_in_pset(psetid_t pset, 310 processorid_t** id_array, 311 uint_t* id_length) { 312 bool result = false; 313 // Find the number of processors in the processor set. 314 if (pset_info(pset, NULL, id_length, NULL) == 0) { 315 // Make up an array to hold their ids. 316 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 317 // Fill in the array with their processor ids. 318 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 319 result = true; 320 } 321 } 322 return result; 323} 324 325// Callers of find_processors_online() must tolerate imprecise results -- 326// the system configuration can change asynchronously because of DR 327// or explicit psradm operations. 328// 329// We also need to take care that the loop (below) terminates as the 330// number of processors online can change between the _SC_NPROCESSORS_ONLN 331// request and the loop that builds the list of processor ids. Unfortunately 332// there's no reliable way to determine the maximum valid processor id, 333// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 334// man pages, which claim the processor id set is "sparse, but 335// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 336// exit the loop. 337// 338// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 339// not available on S8.0. 340 341static bool find_processors_online(processorid_t** id_array, 342 uint* id_length) { 343 const processorid_t MAX_PROCESSOR_ID = 100000; 344 // Find the number of processors online. 345 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 346 // Make up an array to hold their ids. 347 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 348 // Processors need not be numbered consecutively. 349 long found = 0; 350 processorid_t next = 0; 351 while (found < *id_length && next < MAX_PROCESSOR_ID) { 352 processor_info_t info; 353 if (processor_info(next, &info) == 0) { 354 // NB, PI_NOINTR processors are effectively online ... 355 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 356 (*id_array)[found] = next; 357 found += 1; 358 } 359 } 360 next += 1; 361 } 362 if (found < *id_length) { 363 // The loop above didn't identify the expected number of processors. 364 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 365 // and re-running the loop, above, but there's no guarantee of progress 366 // if the system configuration is in flux. Instead, we just return what 367 // we've got. Note that in the worst case find_processors_online() could 368 // return an empty set. (As a fall-back in the case of the empty set we 369 // could just return the ID of the current processor). 370 *id_length = found; 371 } 372 373 return true; 374} 375 376static bool assign_distribution(processorid_t* id_array, 377 uint id_length, 378 uint* distribution, 379 uint distribution_length) { 380 // We assume we can assign processorid_t's to uint's. 381 assert(sizeof(processorid_t) == sizeof(uint), 382 "can't convert processorid_t to uint"); 383 // Quick check to see if we won't succeed. 384 if (id_length < distribution_length) { 385 return false; 386 } 387 // Assign processor ids to the distribution. 388 // Try to shuffle processors to distribute work across boards, 389 // assuming 4 processors per board. 390 const uint processors_per_board = ProcessDistributionStride; 391 // Find the maximum processor id. 392 processorid_t max_id = 0; 393 for (uint m = 0; m < id_length; m += 1) { 394 max_id = MAX2(max_id, id_array[m]); 395 } 396 // The next id, to limit loops. 397 const processorid_t limit_id = max_id + 1; 398 // Make up markers for available processors. 399 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 400 for (uint c = 0; c < limit_id; c += 1) { 401 available_id[c] = false; 402 } 403 for (uint a = 0; a < id_length; a += 1) { 404 available_id[id_array[a]] = true; 405 } 406 // Step by "boards", then by "slot", copying to "assigned". 407 // NEEDS_CLEANUP: The assignment of processors should be stateful, 408 // remembering which processors have been assigned by 409 // previous calls, etc., so as to distribute several 410 // independent calls of this method. What we'd like is 411 // It would be nice to have an API that let us ask 412 // how many processes are bound to a processor, 413 // but we don't have that, either. 414 // In the short term, "board" is static so that 415 // subsequent distributions don't all start at board 0. 416 static uint board = 0; 417 uint assigned = 0; 418 // Until we've found enough processors .... 419 while (assigned < distribution_length) { 420 // ... find the next available processor in the board. 421 for (uint slot = 0; slot < processors_per_board; slot += 1) { 422 uint try_id = board * processors_per_board + slot; 423 if ((try_id < limit_id) && (available_id[try_id] == true)) { 424 distribution[assigned] = try_id; 425 available_id[try_id] = false; 426 assigned += 1; 427 break; 428 } 429 } 430 board += 1; 431 if (board * processors_per_board + 0 >= limit_id) { 432 board = 0; 433 } 434 } 435 if (available_id != NULL) { 436 FREE_C_HEAP_ARRAY(bool, available_id); 437 } 438 return true; 439} 440 441void os::set_native_thread_name(const char *name) { 442 // Not yet implemented. 443 return; 444} 445 446bool os::distribute_processes(uint length, uint* distribution) { 447 bool result = false; 448 // Find the processor id's of all the available CPUs. 449 processorid_t* id_array = NULL; 450 uint id_length = 0; 451 // There are some races between querying information and using it, 452 // since processor sets can change dynamically. 453 psetid_t pset = PS_NONE; 454 // Are we running in a processor set? 455 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 456 result = find_processors_in_pset(pset, &id_array, &id_length); 457 } else { 458 result = find_processors_online(&id_array, &id_length); 459 } 460 if (result == true) { 461 if (id_length >= length) { 462 result = assign_distribution(id_array, id_length, distribution, length); 463 } else { 464 result = false; 465 } 466 } 467 if (id_array != NULL) { 468 FREE_C_HEAP_ARRAY(processorid_t, id_array); 469 } 470 return result; 471} 472 473bool os::bind_to_processor(uint processor_id) { 474 // We assume that a processorid_t can be stored in a uint. 475 assert(sizeof(uint) == sizeof(processorid_t), 476 "can't convert uint to processorid_t"); 477 int bind_result = 478 processor_bind(P_LWPID, // bind LWP. 479 P_MYID, // bind current LWP. 480 (processorid_t) processor_id, // id. 481 NULL); // don't return old binding. 482 return (bind_result == 0); 483} 484 485// Return true if user is running as root. 486 487bool os::have_special_privileges() { 488 static bool init = false; 489 static bool privileges = false; 490 if (!init) { 491 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 492 init = true; 493 } 494 return privileges; 495} 496 497 498void os::init_system_properties_values() { 499 // The next steps are taken in the product version: 500 // 501 // Obtain the JAVA_HOME value from the location of libjvm.so. 502 // This library should be located at: 503 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 504 // 505 // If "/jre/lib/" appears at the right place in the path, then we 506 // assume libjvm.so is installed in a JDK and we use this path. 507 // 508 // Otherwise exit with message: "Could not create the Java virtual machine." 509 // 510 // The following extra steps are taken in the debugging version: 511 // 512 // If "/jre/lib/" does NOT appear at the right place in the path 513 // instead of exit check for $JAVA_HOME environment variable. 514 // 515 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 516 // then we append a fake suffix "hotspot/libjvm.so" to this path so 517 // it looks like libjvm.so is installed there 518 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 519 // 520 // Otherwise exit. 521 // 522 // Important note: if the location of libjvm.so changes this 523 // code needs to be changed accordingly. 524 525// Base path of extensions installed on the system. 526#define SYS_EXT_DIR "/usr/jdk/packages" 527#define EXTENSIONS_DIR "/lib/ext" 528 529 char cpu_arch[12]; 530 // Buffer that fits several sprintfs. 531 // Note that the space for the colon and the trailing null are provided 532 // by the nulls included by the sizeof operator. 533 const size_t bufsize = 534 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. 535 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path 536 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir 537 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); 538 539 // sysclasspath, java_home, dll_dir 540 { 541 char *pslash; 542 os::jvm_path(buf, bufsize); 543 544 // Found the full path to libjvm.so. 545 // Now cut the path to <java_home>/jre if we can. 546 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. 547 pslash = strrchr(buf, '/'); 548 if (pslash != NULL) { 549 *pslash = '\0'; // Get rid of /{client|server|hotspot}. 550 } 551 Arguments::set_dll_dir(buf); 552 553 if (pslash != NULL) { 554 pslash = strrchr(buf, '/'); 555 if (pslash != NULL) { 556 *pslash = '\0'; // Get rid of /<arch>. 557 pslash = strrchr(buf, '/'); 558 if (pslash != NULL) { 559 *pslash = '\0'; // Get rid of /lib. 560 } 561 } 562 } 563 Arguments::set_java_home(buf); 564 set_boot_path('/', ':'); 565 } 566 567 // Where to look for native libraries. 568 { 569 // Use dlinfo() to determine the correct java.library.path. 570 // 571 // If we're launched by the Java launcher, and the user 572 // does not set java.library.path explicitly on the commandline, 573 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 574 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 575 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 576 // /usr/lib), which is exactly what we want. 577 // 578 // If the user does set java.library.path, it completely 579 // overwrites this setting, and always has. 580 // 581 // If we're not launched by the Java launcher, we may 582 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 583 // settings. Again, dlinfo does exactly what we want. 584 585 Dl_serinfo info_sz, *info = &info_sz; 586 Dl_serpath *path; 587 char *library_path; 588 char *common_path = buf; 589 590 // Determine search path count and required buffer size. 591 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 592 FREE_C_HEAP_ARRAY(char, buf); 593 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 594 } 595 596 // Allocate new buffer and initialize. 597 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal); 598 info->dls_size = info_sz.dls_size; 599 info->dls_cnt = info_sz.dls_cnt; 600 601 // Obtain search path information. 602 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 603 FREE_C_HEAP_ARRAY(char, buf); 604 FREE_C_HEAP_ARRAY(char, info); 605 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 606 } 607 608 path = &info->dls_serpath[0]; 609 610 // Note: Due to a legacy implementation, most of the library path 611 // is set in the launcher. This was to accomodate linking restrictions 612 // on legacy Solaris implementations (which are no longer supported). 613 // Eventually, all the library path setting will be done here. 614 // 615 // However, to prevent the proliferation of improperly built native 616 // libraries, the new path component /usr/jdk/packages is added here. 617 618 // Determine the actual CPU architecture. 619 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 620#ifdef _LP64 621 // If we are a 64-bit vm, perform the following translations: 622 // sparc -> sparcv9 623 // i386 -> amd64 624 if (strcmp(cpu_arch, "sparc") == 0) { 625 strcat(cpu_arch, "v9"); 626 } else if (strcmp(cpu_arch, "i386") == 0) { 627 strcpy(cpu_arch, "amd64"); 628 } 629#endif 630 631 // Construct the invariant part of ld_library_path. 632 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch); 633 634 // Struct size is more than sufficient for the path components obtained 635 // through the dlinfo() call, so only add additional space for the path 636 // components explicitly added here. 637 size_t library_path_size = info->dls_size + strlen(common_path); 638 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal); 639 library_path[0] = '\0'; 640 641 // Construct the desired Java library path from the linker's library 642 // search path. 643 // 644 // For compatibility, it is optimal that we insert the additional path 645 // components specific to the Java VM after those components specified 646 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 647 // infrastructure. 648 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it. 649 strcpy(library_path, common_path); 650 } else { 651 int inserted = 0; 652 int i; 653 for (i = 0; i < info->dls_cnt; i++, path++) { 654 uint_t flags = path->dls_flags & LA_SER_MASK; 655 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 656 strcat(library_path, common_path); 657 strcat(library_path, os::path_separator()); 658 inserted = 1; 659 } 660 strcat(library_path, path->dls_name); 661 strcat(library_path, os::path_separator()); 662 } 663 // Eliminate trailing path separator. 664 library_path[strlen(library_path)-1] = '\0'; 665 } 666 667 // happens before argument parsing - can't use a trace flag 668 // tty->print_raw("init_system_properties_values: native lib path: "); 669 // tty->print_raw_cr(library_path); 670 671 // Callee copies into its own buffer. 672 Arguments::set_library_path(library_path); 673 674 FREE_C_HEAP_ARRAY(char, library_path); 675 FREE_C_HEAP_ARRAY(char, info); 676 } 677 678 // Extensions directories. 679 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); 680 Arguments::set_ext_dirs(buf); 681 682 FREE_C_HEAP_ARRAY(char, buf); 683 684#undef SYS_EXT_DIR 685#undef EXTENSIONS_DIR 686} 687 688void os::breakpoint() { 689 BREAKPOINT; 690} 691 692bool os::obsolete_option(const JavaVMOption *option) { 693 if (!strncmp(option->optionString, "-Xt", 3)) { 694 return true; 695 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 696 return true; 697 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 698 return true; 699 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 700 return true; 701 } 702 return false; 703} 704 705bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 706 address stackStart = (address)thread->stack_base(); 707 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 708 if (sp < stackStart && sp >= stackEnd) return true; 709 return false; 710} 711 712extern "C" void breakpoint() { 713 // use debugger to set breakpoint here 714} 715 716static thread_t main_thread; 717 718// Thread start routine for all new Java threads 719extern "C" void* java_start(void* thread_addr) { 720 // Try to randomize the cache line index of hot stack frames. 721 // This helps when threads of the same stack traces evict each other's 722 // cache lines. The threads can be either from the same JVM instance, or 723 // from different JVM instances. The benefit is especially true for 724 // processors with hyperthreading technology. 725 static int counter = 0; 726 int pid = os::current_process_id(); 727 alloca(((pid ^ counter++) & 7) * 128); 728 729 int prio; 730 Thread* thread = (Thread*)thread_addr; 731 OSThread* osthr = thread->osthread(); 732 733 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound 734 thread->_schedctl = (void *) schedctl_init(); 735 736 if (UseNUMA) { 737 int lgrp_id = os::numa_get_group_id(); 738 if (lgrp_id != -1) { 739 thread->set_lgrp_id(lgrp_id); 740 } 741 } 742 743 // If the creator called set priority before we started, 744 // we need to call set_native_priority now that we have an lwp. 745 // We used to get the priority from thr_getprio (we called 746 // thr_setprio way back in create_thread) and pass it to 747 // set_native_priority, but Solaris scales the priority 748 // in java_to_os_priority, so when we read it back here, 749 // we pass trash to set_native_priority instead of what's 750 // in java_to_os_priority. So we save the native priority 751 // in the osThread and recall it here. 752 753 if (osthr->thread_id() != -1) { 754 if (UseThreadPriorities) { 755 int prio = osthr->native_priority(); 756 if (ThreadPriorityVerbose) { 757 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 758 INTPTR_FORMAT ", setting priority: %d\n", 759 osthr->thread_id(), osthr->lwp_id(), prio); 760 } 761 os::set_native_priority(thread, prio); 762 } 763 } else if (ThreadPriorityVerbose) { 764 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 765 } 766 767 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 768 769 // initialize signal mask for this thread 770 os::Solaris::hotspot_sigmask(thread); 771 772 thread->run(); 773 774 // One less thread is executing 775 // When the VMThread gets here, the main thread may have already exited 776 // which frees the CodeHeap containing the Atomic::dec code 777 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 778 Atomic::dec(&os::Solaris::_os_thread_count); 779 } 780 781 if (UseDetachedThreads) { 782 thr_exit(NULL); 783 ShouldNotReachHere(); 784 } 785 return NULL; 786} 787 788static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 789 // Allocate the OSThread object 790 OSThread* osthread = new OSThread(NULL, NULL); 791 if (osthread == NULL) return NULL; 792 793 // Store info on the Solaris thread into the OSThread 794 osthread->set_thread_id(thread_id); 795 osthread->set_lwp_id(_lwp_self()); 796 thread->_schedctl = (void *) schedctl_init(); 797 798 if (UseNUMA) { 799 int lgrp_id = os::numa_get_group_id(); 800 if (lgrp_id != -1) { 801 thread->set_lgrp_id(lgrp_id); 802 } 803 } 804 805 if (ThreadPriorityVerbose) { 806 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 807 osthread->thread_id(), osthread->lwp_id()); 808 } 809 810 // Initial thread state is INITIALIZED, not SUSPENDED 811 osthread->set_state(INITIALIZED); 812 813 return osthread; 814} 815 816void os::Solaris::hotspot_sigmask(Thread* thread) { 817 //Save caller's signal mask 818 sigset_t sigmask; 819 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 820 OSThread *osthread = thread->osthread(); 821 osthread->set_caller_sigmask(sigmask); 822 823 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 824 if (!ReduceSignalUsage) { 825 if (thread->is_VM_thread()) { 826 // Only the VM thread handles BREAK_SIGNAL ... 827 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 828 } else { 829 // ... all other threads block BREAK_SIGNAL 830 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 831 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 832 } 833 } 834} 835 836bool os::create_attached_thread(JavaThread* thread) { 837#ifdef ASSERT 838 thread->verify_not_published(); 839#endif 840 OSThread* osthread = create_os_thread(thread, thr_self()); 841 if (osthread == NULL) { 842 return false; 843 } 844 845 // Initial thread state is RUNNABLE 846 osthread->set_state(RUNNABLE); 847 thread->set_osthread(osthread); 848 849 // initialize signal mask for this thread 850 // and save the caller's signal mask 851 os::Solaris::hotspot_sigmask(thread); 852 853 return true; 854} 855 856bool os::create_main_thread(JavaThread* thread) { 857#ifdef ASSERT 858 thread->verify_not_published(); 859#endif 860 if (_starting_thread == NULL) { 861 _starting_thread = create_os_thread(thread, main_thread); 862 if (_starting_thread == NULL) { 863 return false; 864 } 865 } 866 867 // The primodial thread is runnable from the start 868 _starting_thread->set_state(RUNNABLE); 869 870 thread->set_osthread(_starting_thread); 871 872 // initialize signal mask for this thread 873 // and save the caller's signal mask 874 os::Solaris::hotspot_sigmask(thread); 875 876 return true; 877} 878 879 880bool os::create_thread(Thread* thread, ThreadType thr_type, 881 size_t stack_size) { 882 // Allocate the OSThread object 883 OSThread* osthread = new OSThread(NULL, NULL); 884 if (osthread == NULL) { 885 return false; 886 } 887 888 if (ThreadPriorityVerbose) { 889 char *thrtyp; 890 switch (thr_type) { 891 case vm_thread: 892 thrtyp = (char *)"vm"; 893 break; 894 case cgc_thread: 895 thrtyp = (char *)"cgc"; 896 break; 897 case pgc_thread: 898 thrtyp = (char *)"pgc"; 899 break; 900 case java_thread: 901 thrtyp = (char *)"java"; 902 break; 903 case compiler_thread: 904 thrtyp = (char *)"compiler"; 905 break; 906 case watcher_thread: 907 thrtyp = (char *)"watcher"; 908 break; 909 default: 910 thrtyp = (char *)"unknown"; 911 break; 912 } 913 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 914 } 915 916 // Calculate stack size if it's not specified by caller. 917 if (stack_size == 0) { 918 // The default stack size 1M (2M for LP64). 919 stack_size = (BytesPerWord >> 2) * K * K; 920 921 switch (thr_type) { 922 case os::java_thread: 923 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 924 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 925 break; 926 case os::compiler_thread: 927 if (CompilerThreadStackSize > 0) { 928 stack_size = (size_t)(CompilerThreadStackSize * K); 929 break; 930 } // else fall through: 931 // use VMThreadStackSize if CompilerThreadStackSize is not defined 932 case os::vm_thread: 933 case os::pgc_thread: 934 case os::cgc_thread: 935 case os::watcher_thread: 936 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 937 break; 938 } 939 } 940 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 941 942 // Initial state is ALLOCATED but not INITIALIZED 943 osthread->set_state(ALLOCATED); 944 945 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 946 // We got lots of threads. Check if we still have some address space left. 947 // Need to be at least 5Mb of unreserved address space. We do check by 948 // trying to reserve some. 949 const size_t VirtualMemoryBangSize = 20*K*K; 950 char* mem = os::reserve_memory(VirtualMemoryBangSize); 951 if (mem == NULL) { 952 delete osthread; 953 return false; 954 } else { 955 // Release the memory again 956 os::release_memory(mem, VirtualMemoryBangSize); 957 } 958 } 959 960 // Setup osthread because the child thread may need it. 961 thread->set_osthread(osthread); 962 963 // Create the Solaris thread 964 thread_t tid = 0; 965 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED; 966 int status; 967 968 // Mark that we don't have an lwp or thread id yet. 969 // In case we attempt to set the priority before the thread starts. 970 osthread->set_lwp_id(-1); 971 osthread->set_thread_id(-1); 972 973 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 974 if (status != 0) { 975 if (PrintMiscellaneous && (Verbose || WizardMode)) { 976 perror("os::create_thread"); 977 } 978 thread->set_osthread(NULL); 979 // Need to clean up stuff we've allocated so far 980 delete osthread; 981 return false; 982 } 983 984 Atomic::inc(&os::Solaris::_os_thread_count); 985 986 // Store info on the Solaris thread into the OSThread 987 osthread->set_thread_id(tid); 988 989 // Remember that we created this thread so we can set priority on it 990 osthread->set_vm_created(); 991 992 // Initial thread state is INITIALIZED, not SUSPENDED 993 osthread->set_state(INITIALIZED); 994 995 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 996 return true; 997} 998 999// defined for >= Solaris 10. This allows builds on earlier versions 1000// of Solaris to take advantage of the newly reserved Solaris JVM signals. 1001// With SIGJVM1, SIGJVM2, ASYNC_SIGNAL is SIGJVM2. Previously INTERRUPT_SIGNAL 1002// was SIGJVM1. 1003// 1004#if !defined(SIGJVM1) 1005 #define SIGJVM1 39 1006 #define SIGJVM2 40 1007#endif 1008 1009debug_only(static bool signal_sets_initialized = false); 1010static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1011 1012int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1013 1014bool os::Solaris::is_sig_ignored(int sig) { 1015 struct sigaction oact; 1016 sigaction(sig, (struct sigaction*)NULL, &oact); 1017 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1018 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1019 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) { 1020 return true; 1021 } else { 1022 return false; 1023 } 1024} 1025 1026// Note: SIGRTMIN is a macro that calls sysconf() so it will 1027// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1028static bool isJVM1available() { 1029 return SIGJVM1 < SIGRTMIN; 1030} 1031 1032void os::Solaris::signal_sets_init() { 1033 // Should also have an assertion stating we are still single-threaded. 1034 assert(!signal_sets_initialized, "Already initialized"); 1035 // Fill in signals that are necessarily unblocked for all threads in 1036 // the VM. Currently, we unblock the following signals: 1037 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1038 // by -Xrs (=ReduceSignalUsage)); 1039 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1040 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1041 // the dispositions or masks wrt these signals. 1042 // Programs embedding the VM that want to use the above signals for their 1043 // own purposes must, at this time, use the "-Xrs" option to prevent 1044 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1045 // (See bug 4345157, and other related bugs). 1046 // In reality, though, unblocking these signals is really a nop, since 1047 // these signals are not blocked by default. 1048 sigemptyset(&unblocked_sigs); 1049 sigemptyset(&allowdebug_blocked_sigs); 1050 sigaddset(&unblocked_sigs, SIGILL); 1051 sigaddset(&unblocked_sigs, SIGSEGV); 1052 sigaddset(&unblocked_sigs, SIGBUS); 1053 sigaddset(&unblocked_sigs, SIGFPE); 1054 1055 // Always true on Solaris 10+ 1056 guarantee(isJVM1available(), "SIGJVM1/2 missing!"); 1057 os::Solaris::set_SIGasync(SIGJVM2); 1058 1059 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1060 1061 if (!ReduceSignalUsage) { 1062 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1063 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1064 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1065 } 1066 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1067 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1068 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1069 } 1070 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1071 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1072 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1073 } 1074 } 1075 // Fill in signals that are blocked by all but the VM thread. 1076 sigemptyset(&vm_sigs); 1077 if (!ReduceSignalUsage) { 1078 sigaddset(&vm_sigs, BREAK_SIGNAL); 1079 } 1080 debug_only(signal_sets_initialized = true); 1081 1082 // For diagnostics only used in run_periodic_checks 1083 sigemptyset(&check_signal_done); 1084} 1085 1086// These are signals that are unblocked while a thread is running Java. 1087// (For some reason, they get blocked by default.) 1088sigset_t* os::Solaris::unblocked_signals() { 1089 assert(signal_sets_initialized, "Not initialized"); 1090 return &unblocked_sigs; 1091} 1092 1093// These are the signals that are blocked while a (non-VM) thread is 1094// running Java. Only the VM thread handles these signals. 1095sigset_t* os::Solaris::vm_signals() { 1096 assert(signal_sets_initialized, "Not initialized"); 1097 return &vm_sigs; 1098} 1099 1100// These are signals that are blocked during cond_wait to allow debugger in 1101sigset_t* os::Solaris::allowdebug_blocked_signals() { 1102 assert(signal_sets_initialized, "Not initialized"); 1103 return &allowdebug_blocked_sigs; 1104} 1105 1106 1107void _handle_uncaught_cxx_exception() { 1108 VMError::report_and_die("An uncaught C++ exception"); 1109} 1110 1111 1112// First crack at OS-specific initialization, from inside the new thread. 1113void os::initialize_thread(Thread* thr) { 1114 int r = thr_main(); 1115 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 1116 if (r) { 1117 JavaThread* jt = (JavaThread *)thr; 1118 assert(jt != NULL, "Sanity check"); 1119 size_t stack_size; 1120 address base = jt->stack_base(); 1121 if (Arguments::created_by_java_launcher()) { 1122 // Use 2MB to allow for Solaris 7 64 bit mode. 1123 stack_size = JavaThread::stack_size_at_create() == 0 1124 ? 2048*K : JavaThread::stack_size_at_create(); 1125 1126 // There are rare cases when we may have already used more than 1127 // the basic stack size allotment before this method is invoked. 1128 // Attempt to allow for a normally sized java_stack. 1129 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1130 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1131 } else { 1132 // 6269555: If we were not created by a Java launcher, i.e. if we are 1133 // running embedded in a native application, treat the primordial thread 1134 // as much like a native attached thread as possible. This means using 1135 // the current stack size from thr_stksegment(), unless it is too large 1136 // to reliably setup guard pages. A reasonable max size is 8MB. 1137 size_t current_size = current_stack_size(); 1138 // This should never happen, but just in case.... 1139 if (current_size == 0) current_size = 2 * K * K; 1140 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1141 } 1142 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1143 stack_size = (size_t)(base - bottom); 1144 1145 assert(stack_size > 0, "Stack size calculation problem"); 1146 1147 if (stack_size > jt->stack_size()) { 1148#ifndef PRODUCT 1149 struct rlimit limits; 1150 getrlimit(RLIMIT_STACK, &limits); 1151 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1152 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1153#endif 1154 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n" 1155 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1156 "See limit(1) to increase the stack size limit.", 1157 stack_size / K, jt->stack_size() / K); 1158 vm_exit(1); 1159 } 1160 assert(jt->stack_size() >= stack_size, 1161 "Attempt to map more stack than was allocated"); 1162 jt->set_stack_size(stack_size); 1163 } 1164 1165 // With the T2 libthread (T1 is no longer supported) threads are always bound 1166 // and we use stackbanging in all cases. 1167 1168 os::Solaris::init_thread_fpu_state(); 1169 std::set_terminate(_handle_uncaught_cxx_exception); 1170} 1171 1172 1173 1174// Free Solaris resources related to the OSThread 1175void os::free_thread(OSThread* osthread) { 1176 assert(osthread != NULL, "os::free_thread but osthread not set"); 1177 1178 1179 // We are told to free resources of the argument thread, 1180 // but we can only really operate on the current thread. 1181 // The main thread must take the VMThread down synchronously 1182 // before the main thread exits and frees up CodeHeap 1183 guarantee((Thread::current()->osthread() == osthread 1184 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1185 if (Thread::current()->osthread() == osthread) { 1186 // Restore caller's signal mask 1187 sigset_t sigmask = osthread->caller_sigmask(); 1188 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1189 } 1190 delete osthread; 1191} 1192 1193void os::pd_start_thread(Thread* thread) { 1194 int status = thr_continue(thread->osthread()->thread_id()); 1195 assert_status(status == 0, status, "thr_continue failed"); 1196} 1197 1198 1199intx os::current_thread_id() { 1200 return (intx)thr_self(); 1201} 1202 1203static pid_t _initial_pid = 0; 1204 1205int os::current_process_id() { 1206 return (int)(_initial_pid ? _initial_pid : getpid()); 1207} 1208 1209// gethrtime() should be monotonic according to the documentation, 1210// but some virtualized platforms are known to break this guarantee. 1211// getTimeNanos() must be guaranteed not to move backwards, so we 1212// are forced to add a check here. 1213inline hrtime_t getTimeNanos() { 1214 const hrtime_t now = gethrtime(); 1215 const hrtime_t prev = max_hrtime; 1216 if (now <= prev) { 1217 return prev; // same or retrograde time; 1218 } 1219 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1220 assert(obsv >= prev, "invariant"); // Monotonicity 1221 // If the CAS succeeded then we're done and return "now". 1222 // If the CAS failed and the observed value "obsv" is >= now then 1223 // we should return "obsv". If the CAS failed and now > obsv > prv then 1224 // some other thread raced this thread and installed a new value, in which case 1225 // we could either (a) retry the entire operation, (b) retry trying to install now 1226 // or (c) just return obsv. We use (c). No loop is required although in some cases 1227 // we might discard a higher "now" value in deference to a slightly lower but freshly 1228 // installed obsv value. That's entirely benign -- it admits no new orderings compared 1229 // to (a) or (b) -- and greatly reduces coherence traffic. 1230 // We might also condition (c) on the magnitude of the delta between obsv and now. 1231 // Avoiding excessive CAS operations to hot RW locations is critical. 1232 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate 1233 return (prev == obsv) ? now : obsv; 1234} 1235 1236// Time since start-up in seconds to a fine granularity. 1237// Used by VMSelfDestructTimer and the MemProfiler. 1238double os::elapsedTime() { 1239 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1240} 1241 1242jlong os::elapsed_counter() { 1243 return (jlong)(getTimeNanos() - first_hrtime); 1244} 1245 1246jlong os::elapsed_frequency() { 1247 return hrtime_hz; 1248} 1249 1250// Return the real, user, and system times in seconds from an 1251// arbitrary fixed point in the past. 1252bool os::getTimesSecs(double* process_real_time, 1253 double* process_user_time, 1254 double* process_system_time) { 1255 struct tms ticks; 1256 clock_t real_ticks = times(&ticks); 1257 1258 if (real_ticks == (clock_t) (-1)) { 1259 return false; 1260 } else { 1261 double ticks_per_second = (double) clock_tics_per_sec; 1262 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1263 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1264 // For consistency return the real time from getTimeNanos() 1265 // converted to seconds. 1266 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1267 1268 return true; 1269 } 1270} 1271 1272bool os::supports_vtime() { return true; } 1273 1274bool os::enable_vtime() { 1275 int fd = ::open("/proc/self/ctl", O_WRONLY); 1276 if (fd == -1) { 1277 return false; 1278 } 1279 1280 long cmd[] = { PCSET, PR_MSACCT }; 1281 int res = ::write(fd, cmd, sizeof(long) * 2); 1282 ::close(fd); 1283 if (res != sizeof(long) * 2) { 1284 return false; 1285 } 1286 return true; 1287} 1288 1289bool os::vtime_enabled() { 1290 int fd = ::open("/proc/self/status", O_RDONLY); 1291 if (fd == -1) { 1292 return false; 1293 } 1294 1295 pstatus_t status; 1296 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1297 ::close(fd); 1298 if (res != sizeof(pstatus_t)) { 1299 return false; 1300 } 1301 return status.pr_flags & PR_MSACCT; 1302} 1303 1304double os::elapsedVTime() { 1305 return (double)gethrvtime() / (double)hrtime_hz; 1306} 1307 1308// Used internally for comparisons only 1309// getTimeMillis guaranteed to not move backwards on Solaris 1310jlong getTimeMillis() { 1311 jlong nanotime = getTimeNanos(); 1312 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1313} 1314 1315// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1316jlong os::javaTimeMillis() { 1317 timeval t; 1318 if (gettimeofday(&t, NULL) == -1) { 1319 fatal("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); 1320 } 1321 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1322} 1323 1324void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) { 1325 timeval t; 1326 if (gettimeofday(&t, NULL) == -1) { 1327 fatal("os::javaTimeSystemUTC: gettimeofday (%s)", strerror(errno)); 1328 } 1329 seconds = jlong(t.tv_sec); 1330 nanos = jlong(t.tv_usec) * 1000; 1331} 1332 1333 1334jlong os::javaTimeNanos() { 1335 return (jlong)getTimeNanos(); 1336} 1337 1338void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1339 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1340 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1341 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1342 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1343} 1344 1345char * os::local_time_string(char *buf, size_t buflen) { 1346 struct tm t; 1347 time_t long_time; 1348 time(&long_time); 1349 localtime_r(&long_time, &t); 1350 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1351 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1352 t.tm_hour, t.tm_min, t.tm_sec); 1353 return buf; 1354} 1355 1356// Note: os::shutdown() might be called very early during initialization, or 1357// called from signal handler. Before adding something to os::shutdown(), make 1358// sure it is async-safe and can handle partially initialized VM. 1359void os::shutdown() { 1360 1361 // allow PerfMemory to attempt cleanup of any persistent resources 1362 perfMemory_exit(); 1363 1364 // needs to remove object in file system 1365 AttachListener::abort(); 1366 1367 // flush buffered output, finish log files 1368 ostream_abort(); 1369 1370 // Check for abort hook 1371 abort_hook_t abort_hook = Arguments::abort_hook(); 1372 if (abort_hook != NULL) { 1373 abort_hook(); 1374 } 1375} 1376 1377// Note: os::abort() might be called very early during initialization, or 1378// called from signal handler. Before adding something to os::abort(), make 1379// sure it is async-safe and can handle partially initialized VM. 1380void os::abort(bool dump_core, void* siginfo, void* context) { 1381 os::shutdown(); 1382 if (dump_core) { 1383#ifndef PRODUCT 1384 fdStream out(defaultStream::output_fd()); 1385 out.print_raw("Current thread is "); 1386 char buf[16]; 1387 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1388 out.print_raw_cr(buf); 1389 out.print_raw_cr("Dumping core ..."); 1390#endif 1391 ::abort(); // dump core (for debugging) 1392 } 1393 1394 ::exit(1); 1395} 1396 1397// Die immediately, no exit hook, no abort hook, no cleanup. 1398void os::die() { 1399 ::abort(); // dump core (for debugging) 1400} 1401 1402// DLL functions 1403 1404const char* os::dll_file_extension() { return ".so"; } 1405 1406// This must be hard coded because it's the system's temporary 1407// directory not the java application's temp directory, ala java.io.tmpdir. 1408const char* os::get_temp_directory() { return "/tmp"; } 1409 1410static bool file_exists(const char* filename) { 1411 struct stat statbuf; 1412 if (filename == NULL || strlen(filename) == 0) { 1413 return false; 1414 } 1415 return os::stat(filename, &statbuf) == 0; 1416} 1417 1418bool os::dll_build_name(char* buffer, size_t buflen, 1419 const char* pname, const char* fname) { 1420 bool retval = false; 1421 const size_t pnamelen = pname ? strlen(pname) : 0; 1422 1423 // Return error on buffer overflow. 1424 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1425 return retval; 1426 } 1427 1428 if (pnamelen == 0) { 1429 snprintf(buffer, buflen, "lib%s.so", fname); 1430 retval = true; 1431 } else if (strchr(pname, *os::path_separator()) != NULL) { 1432 int n; 1433 char** pelements = split_path(pname, &n); 1434 if (pelements == NULL) { 1435 return false; 1436 } 1437 for (int i = 0; i < n; i++) { 1438 // really shouldn't be NULL but what the heck, check can't hurt 1439 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1440 continue; // skip the empty path values 1441 } 1442 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1443 if (file_exists(buffer)) { 1444 retval = true; 1445 break; 1446 } 1447 } 1448 // release the storage 1449 for (int i = 0; i < n; i++) { 1450 if (pelements[i] != NULL) { 1451 FREE_C_HEAP_ARRAY(char, pelements[i]); 1452 } 1453 } 1454 if (pelements != NULL) { 1455 FREE_C_HEAP_ARRAY(char*, pelements); 1456 } 1457 } else { 1458 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1459 retval = true; 1460 } 1461 return retval; 1462} 1463 1464// check if addr is inside libjvm.so 1465bool os::address_is_in_vm(address addr) { 1466 static address libjvm_base_addr; 1467 Dl_info dlinfo; 1468 1469 if (libjvm_base_addr == NULL) { 1470 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { 1471 libjvm_base_addr = (address)dlinfo.dli_fbase; 1472 } 1473 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1474 } 1475 1476 if (dladdr((void *)addr, &dlinfo) != 0) { 1477 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1478 } 1479 1480 return false; 1481} 1482 1483typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int); 1484static dladdr1_func_type dladdr1_func = NULL; 1485 1486bool os::dll_address_to_function_name(address addr, char *buf, 1487 int buflen, int * offset, 1488 bool demangle) { 1489 // buf is not optional, but offset is optional 1490 assert(buf != NULL, "sanity check"); 1491 1492 Dl_info dlinfo; 1493 1494 // dladdr1_func was initialized in os::init() 1495 if (dladdr1_func != NULL) { 1496 // yes, we have dladdr1 1497 1498 // Support for dladdr1 is checked at runtime; it may be 1499 // available even if the vm is built on a machine that does 1500 // not have dladdr1 support. Make sure there is a value for 1501 // RTLD_DL_SYMENT. 1502#ifndef RTLD_DL_SYMENT 1503 #define RTLD_DL_SYMENT 1 1504#endif 1505#ifdef _LP64 1506 Elf64_Sym * info; 1507#else 1508 Elf32_Sym * info; 1509#endif 1510 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1511 RTLD_DL_SYMENT) != 0) { 1512 // see if we have a matching symbol that covers our address 1513 if (dlinfo.dli_saddr != NULL && 1514 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1515 if (dlinfo.dli_sname != NULL) { 1516 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1517 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1518 } 1519 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1520 return true; 1521 } 1522 } 1523 // no matching symbol so try for just file info 1524 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1525 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1526 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1527 return true; 1528 } 1529 } 1530 } 1531 buf[0] = '\0'; 1532 if (offset != NULL) *offset = -1; 1533 return false; 1534 } 1535 1536 // no, only dladdr is available 1537 if (dladdr((void *)addr, &dlinfo) != 0) { 1538 // see if we have a matching symbol 1539 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { 1540 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1541 jio_snprintf(buf, buflen, dlinfo.dli_sname); 1542 } 1543 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1544 return true; 1545 } 1546 // no matching symbol so try for just file info 1547 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1548 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1549 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1550 return true; 1551 } 1552 } 1553 } 1554 buf[0] = '\0'; 1555 if (offset != NULL) *offset = -1; 1556 return false; 1557} 1558 1559bool os::dll_address_to_library_name(address addr, char* buf, 1560 int buflen, int* offset) { 1561 // buf is not optional, but offset is optional 1562 assert(buf != NULL, "sanity check"); 1563 1564 Dl_info dlinfo; 1565 1566 if (dladdr((void*)addr, &dlinfo) != 0) { 1567 if (dlinfo.dli_fname != NULL) { 1568 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1569 } 1570 if (dlinfo.dli_fbase != NULL && offset != NULL) { 1571 *offset = addr - (address)dlinfo.dli_fbase; 1572 } 1573 return true; 1574 } 1575 1576 buf[0] = '\0'; 1577 if (offset) *offset = -1; 1578 return false; 1579} 1580 1581int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) { 1582 Dl_info dli; 1583 // Sanity check? 1584 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 || 1585 dli.dli_fname == NULL) { 1586 return 1; 1587 } 1588 1589 void * handle = dlopen(dli.dli_fname, RTLD_LAZY); 1590 if (handle == NULL) { 1591 return 1; 1592 } 1593 1594 Link_map *map; 1595 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1596 if (map == NULL) { 1597 dlclose(handle); 1598 return 1; 1599 } 1600 1601 while (map->l_prev != NULL) { 1602 map = map->l_prev; 1603 } 1604 1605 while (map != NULL) { 1606 // Iterate through all map entries and call callback with fields of interest 1607 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) { 1608 dlclose(handle); 1609 return 1; 1610 } 1611 map = map->l_next; 1612 } 1613 1614 dlclose(handle); 1615 return 0; 1616} 1617 1618int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) { 1619 outputStream * out = (outputStream *) param; 1620 out->print_cr(PTR_FORMAT " \t%s", base_address, name); 1621 return 0; 1622} 1623 1624void os::print_dll_info(outputStream * st) { 1625 st->print_cr("Dynamic libraries:"); st->flush(); 1626 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) { 1627 st->print_cr("Error: Cannot print dynamic libraries."); 1628 } 1629} 1630 1631// Loads .dll/.so and 1632// in case of error it checks if .dll/.so was built for the 1633// same architecture as Hotspot is running on 1634 1635void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { 1636 void * result= ::dlopen(filename, RTLD_LAZY); 1637 if (result != NULL) { 1638 // Successful loading 1639 return result; 1640 } 1641 1642 Elf32_Ehdr elf_head; 1643 1644 // Read system error message into ebuf 1645 // It may or may not be overwritten below 1646 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1647 ebuf[ebuflen-1]='\0'; 1648 int diag_msg_max_length=ebuflen-strlen(ebuf); 1649 char* diag_msg_buf=ebuf+strlen(ebuf); 1650 1651 if (diag_msg_max_length==0) { 1652 // No more space in ebuf for additional diagnostics message 1653 return NULL; 1654 } 1655 1656 1657 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1658 1659 if (file_descriptor < 0) { 1660 // Can't open library, report dlerror() message 1661 return NULL; 1662 } 1663 1664 bool failed_to_read_elf_head= 1665 (sizeof(elf_head)!= 1666 (::read(file_descriptor, &elf_head,sizeof(elf_head)))); 1667 1668 ::close(file_descriptor); 1669 if (failed_to_read_elf_head) { 1670 // file i/o error - report dlerror() msg 1671 return NULL; 1672 } 1673 1674 typedef struct { 1675 Elf32_Half code; // Actual value as defined in elf.h 1676 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1677 char elf_class; // 32 or 64 bit 1678 char endianess; // MSB or LSB 1679 char* name; // String representation 1680 } arch_t; 1681 1682 static const arch_t arch_array[]={ 1683 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1684 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1685 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1686 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1687 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1688 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1689 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1690 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1691 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 1692 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 1693 }; 1694 1695#if (defined IA32) 1696 static Elf32_Half running_arch_code=EM_386; 1697#elif (defined AMD64) 1698 static Elf32_Half running_arch_code=EM_X86_64; 1699#elif (defined IA64) 1700 static Elf32_Half running_arch_code=EM_IA_64; 1701#elif (defined __sparc) && (defined _LP64) 1702 static Elf32_Half running_arch_code=EM_SPARCV9; 1703#elif (defined __sparc) && (!defined _LP64) 1704 static Elf32_Half running_arch_code=EM_SPARC; 1705#elif (defined __powerpc64__) 1706 static Elf32_Half running_arch_code=EM_PPC64; 1707#elif (defined __powerpc__) 1708 static Elf32_Half running_arch_code=EM_PPC; 1709#elif (defined ARM) 1710 static Elf32_Half running_arch_code=EM_ARM; 1711#else 1712 #error Method os::dll_load requires that one of following is defined:\ 1713 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 1714#endif 1715 1716 // Identify compatability class for VM's architecture and library's architecture 1717 // Obtain string descriptions for architectures 1718 1719 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1720 int running_arch_index=-1; 1721 1722 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) { 1723 if (running_arch_code == arch_array[i].code) { 1724 running_arch_index = i; 1725 } 1726 if (lib_arch.code == arch_array[i].code) { 1727 lib_arch.compat_class = arch_array[i].compat_class; 1728 lib_arch.name = arch_array[i].name; 1729 } 1730 } 1731 1732 assert(running_arch_index != -1, 1733 "Didn't find running architecture code (running_arch_code) in arch_array"); 1734 if (running_arch_index == -1) { 1735 // Even though running architecture detection failed 1736 // we may still continue with reporting dlerror() message 1737 return NULL; 1738 } 1739 1740 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 1741 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 1742 return NULL; 1743 } 1744 1745 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 1746 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 1747 return NULL; 1748 } 1749 1750 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 1751 if (lib_arch.name!=NULL) { 1752 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1753 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 1754 lib_arch.name, arch_array[running_arch_index].name); 1755 } else { 1756 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1757 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 1758 lib_arch.code, 1759 arch_array[running_arch_index].name); 1760 } 1761 } 1762 1763 return NULL; 1764} 1765 1766void* os::dll_lookup(void* handle, const char* name) { 1767 return dlsym(handle, name); 1768} 1769 1770void* os::get_default_process_handle() { 1771 return (void*)::dlopen(NULL, RTLD_LAZY); 1772} 1773 1774int os::stat(const char *path, struct stat *sbuf) { 1775 char pathbuf[MAX_PATH]; 1776 if (strlen(path) > MAX_PATH - 1) { 1777 errno = ENAMETOOLONG; 1778 return -1; 1779 } 1780 os::native_path(strcpy(pathbuf, path)); 1781 return ::stat(pathbuf, sbuf); 1782} 1783 1784static bool _print_ascii_file(const char* filename, outputStream* st) { 1785 int fd = ::open(filename, O_RDONLY); 1786 if (fd == -1) { 1787 return false; 1788 } 1789 1790 char buf[32]; 1791 int bytes; 1792 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 1793 st->print_raw(buf, bytes); 1794 } 1795 1796 ::close(fd); 1797 1798 return true; 1799} 1800 1801void os::print_os_info_brief(outputStream* st) { 1802 os::Solaris::print_distro_info(st); 1803 1804 os::Posix::print_uname_info(st); 1805 1806 os::Solaris::print_libversion_info(st); 1807} 1808 1809void os::print_os_info(outputStream* st) { 1810 st->print("OS:"); 1811 1812 os::Solaris::print_distro_info(st); 1813 1814 os::Posix::print_uname_info(st); 1815 1816 os::Solaris::print_libversion_info(st); 1817 1818 os::Posix::print_rlimit_info(st); 1819 1820 os::Posix::print_load_average(st); 1821} 1822 1823void os::Solaris::print_distro_info(outputStream* st) { 1824 if (!_print_ascii_file("/etc/release", st)) { 1825 st->print("Solaris"); 1826 } 1827 st->cr(); 1828} 1829 1830void os::get_summary_os_info(char* buf, size_t buflen) { 1831 strncpy(buf, "Solaris", buflen); // default to plain solaris 1832 FILE* fp = fopen("/etc/release", "r"); 1833 if (fp != NULL) { 1834 char tmp[256]; 1835 // Only get the first line and chop out everything but the os name. 1836 if (fgets(tmp, sizeof(tmp), fp)) { 1837 char* ptr = tmp; 1838 // skip past whitespace characters 1839 while (*ptr != '\0' && (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')) ptr++; 1840 if (*ptr != '\0') { 1841 char* nl = strchr(ptr, '\n'); 1842 if (nl != NULL) *nl = '\0'; 1843 strncpy(buf, ptr, buflen); 1844 } 1845 } 1846 fclose(fp); 1847 } 1848} 1849 1850void os::Solaris::print_libversion_info(outputStream* st) { 1851 st->print(" (T2 libthread)"); 1852 st->cr(); 1853} 1854 1855static bool check_addr0(outputStream* st) { 1856 jboolean status = false; 1857 int fd = ::open("/proc/self/map",O_RDONLY); 1858 if (fd >= 0) { 1859 prmap_t p; 1860 while (::read(fd, &p, sizeof(p)) > 0) { 1861 if (p.pr_vaddr == 0x0) { 1862 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 1863 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 1864 st->print("Access:"); 1865 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 1866 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 1867 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 1868 st->cr(); 1869 status = true; 1870 } 1871 } 1872 ::close(fd); 1873 } 1874 return status; 1875} 1876 1877void os::get_summary_cpu_info(char* buf, size_t buflen) { 1878 // Get MHz with system call. We don't seem to already have this. 1879 processor_info_t stats; 1880 processorid_t id = getcpuid(); 1881 int clock = 0; 1882 if (processor_info(id, &stats) != -1) { 1883 clock = stats.pi_clock; // pi_processor_type isn't more informative than below 1884 } 1885#ifdef AMD64 1886 snprintf(buf, buflen, "x86 64 bit %d MHz", clock); 1887#else 1888 // must be sparc 1889 snprintf(buf, buflen, "Sparcv9 64 bit %d MHz", clock); 1890#endif 1891} 1892 1893void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) { 1894 // Nothing to do for now. 1895} 1896 1897void os::print_memory_info(outputStream* st) { 1898 st->print("Memory:"); 1899 st->print(" %dk page", os::vm_page_size()>>10); 1900 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 1901 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 1902 st->cr(); 1903 (void) check_addr0(st); 1904} 1905 1906void os::print_siginfo(outputStream* st, void* siginfo) { 1907 const siginfo_t* si = (const siginfo_t*)siginfo; 1908 1909 os::Posix::print_siginfo_brief(st, si); 1910 1911 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 1912 UseSharedSpaces) { 1913 FileMapInfo* mapinfo = FileMapInfo::current_info(); 1914 if (mapinfo->is_in_shared_space(si->si_addr)) { 1915 st->print("\n\nError accessing class data sharing archive." \ 1916 " Mapped file inaccessible during execution, " \ 1917 " possible disk/network problem."); 1918 } 1919 } 1920 st->cr(); 1921} 1922 1923// Moved from whole group, because we need them here for diagnostic 1924// prints. 1925#define OLDMAXSIGNUM 32 1926static int Maxsignum = 0; 1927static int *ourSigFlags = NULL; 1928 1929int os::Solaris::get_our_sigflags(int sig) { 1930 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1931 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1932 return ourSigFlags[sig]; 1933} 1934 1935void os::Solaris::set_our_sigflags(int sig, int flags) { 1936 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1937 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1938 ourSigFlags[sig] = flags; 1939} 1940 1941 1942static const char* get_signal_handler_name(address handler, 1943 char* buf, int buflen) { 1944 int offset; 1945 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 1946 if (found) { 1947 // skip directory names 1948 const char *p1, *p2; 1949 p1 = buf; 1950 size_t len = strlen(os::file_separator()); 1951 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 1952 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 1953 } else { 1954 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 1955 } 1956 return buf; 1957} 1958 1959static void print_signal_handler(outputStream* st, int sig, 1960 char* buf, size_t buflen) { 1961 struct sigaction sa; 1962 1963 sigaction(sig, NULL, &sa); 1964 1965 st->print("%s: ", os::exception_name(sig, buf, buflen)); 1966 1967 address handler = (sa.sa_flags & SA_SIGINFO) 1968 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 1969 : CAST_FROM_FN_PTR(address, sa.sa_handler); 1970 1971 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 1972 st->print("SIG_DFL"); 1973 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 1974 st->print("SIG_IGN"); 1975 } else { 1976 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 1977 } 1978 1979 st->print(", sa_mask[0]="); 1980 os::Posix::print_signal_set_short(st, &sa.sa_mask); 1981 1982 address rh = VMError::get_resetted_sighandler(sig); 1983 // May be, handler was resetted by VMError? 1984 if (rh != NULL) { 1985 handler = rh; 1986 sa.sa_flags = VMError::get_resetted_sigflags(sig); 1987 } 1988 1989 st->print(", sa_flags="); 1990 os::Posix::print_sa_flags(st, sa.sa_flags); 1991 1992 // Check: is it our handler? 1993 if (handler == CAST_FROM_FN_PTR(address, signalHandler)) { 1994 // It is our signal handler 1995 // check for flags 1996 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 1997 st->print( 1998 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 1999 os::Solaris::get_our_sigflags(sig)); 2000 } 2001 } 2002 st->cr(); 2003} 2004 2005void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2006 st->print_cr("Signal Handlers:"); 2007 print_signal_handler(st, SIGSEGV, buf, buflen); 2008 print_signal_handler(st, SIGBUS , buf, buflen); 2009 print_signal_handler(st, SIGFPE , buf, buflen); 2010 print_signal_handler(st, SIGPIPE, buf, buflen); 2011 print_signal_handler(st, SIGXFSZ, buf, buflen); 2012 print_signal_handler(st, SIGILL , buf, buflen); 2013 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2014 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2015 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2016 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2017 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2018 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2019} 2020 2021static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2022 2023// Find the full path to the current module, libjvm.so 2024void os::jvm_path(char *buf, jint buflen) { 2025 // Error checking. 2026 if (buflen < MAXPATHLEN) { 2027 assert(false, "must use a large-enough buffer"); 2028 buf[0] = '\0'; 2029 return; 2030 } 2031 // Lazy resolve the path to current module. 2032 if (saved_jvm_path[0] != 0) { 2033 strcpy(buf, saved_jvm_path); 2034 return; 2035 } 2036 2037 Dl_info dlinfo; 2038 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2039 assert(ret != 0, "cannot locate libjvm"); 2040 if (ret != 0 && dlinfo.dli_fname != NULL) { 2041 realpath((char *)dlinfo.dli_fname, buf); 2042 } else { 2043 buf[0] = '\0'; 2044 return; 2045 } 2046 2047 if (Arguments::sun_java_launcher_is_altjvm()) { 2048 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical 2049 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". 2050 // If "/jre/lib/" appears at the right place in the string, then 2051 // assume we are installed in a JDK and we're done. Otherwise, check 2052 // for a JAVA_HOME environment variable and fix up the path so it 2053 // looks like libjvm.so is installed there (append a fake suffix 2054 // hotspot/libjvm.so). 2055 const char *p = buf + strlen(buf) - 1; 2056 for (int count = 0; p > buf && count < 5; ++count) { 2057 for (--p; p > buf && *p != '/'; --p) 2058 /* empty */ ; 2059 } 2060 2061 if (strncmp(p, "/jre/lib/", 9) != 0) { 2062 // Look for JAVA_HOME in the environment. 2063 char* java_home_var = ::getenv("JAVA_HOME"); 2064 if (java_home_var != NULL && java_home_var[0] != 0) { 2065 char cpu_arch[12]; 2066 char* jrelib_p; 2067 int len; 2068 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2069#ifdef _LP64 2070 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2071 if (strcmp(cpu_arch, "sparc") == 0) { 2072 strcat(cpu_arch, "v9"); 2073 } else if (strcmp(cpu_arch, "i386") == 0) { 2074 strcpy(cpu_arch, "amd64"); 2075 } 2076#endif 2077 // Check the current module name "libjvm.so". 2078 p = strrchr(buf, '/'); 2079 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2080 2081 realpath(java_home_var, buf); 2082 // determine if this is a legacy image or modules image 2083 // modules image doesn't have "jre" subdirectory 2084 len = strlen(buf); 2085 assert(len < buflen, "Ran out of buffer space"); 2086 jrelib_p = buf + len; 2087 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2088 if (0 != access(buf, F_OK)) { 2089 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2090 } 2091 2092 if (0 == access(buf, F_OK)) { 2093 // Use current module name "libjvm.so" 2094 len = strlen(buf); 2095 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2096 } else { 2097 // Go back to path of .so 2098 realpath((char *)dlinfo.dli_fname, buf); 2099 } 2100 } 2101 } 2102 } 2103 2104 strncpy(saved_jvm_path, buf, MAXPATHLEN); 2105 saved_jvm_path[MAXPATHLEN - 1] = '\0'; 2106} 2107 2108 2109void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2110 // no prefix required, not even "_" 2111} 2112 2113 2114void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2115 // no suffix required 2116} 2117 2118// This method is a copy of JDK's sysGetLastErrorString 2119// from src/solaris/hpi/src/system_md.c 2120 2121size_t os::lasterror(char *buf, size_t len) { 2122 if (errno == 0) return 0; 2123 2124 const char *s = ::strerror(errno); 2125 size_t n = ::strlen(s); 2126 if (n >= len) { 2127 n = len - 1; 2128 } 2129 ::strncpy(buf, s, n); 2130 buf[n] = '\0'; 2131 return n; 2132} 2133 2134 2135// sun.misc.Signal 2136 2137extern "C" { 2138 static void UserHandler(int sig, void *siginfo, void *context) { 2139 // Ctrl-C is pressed during error reporting, likely because the error 2140 // handler fails to abort. Let VM die immediately. 2141 if (sig == SIGINT && is_error_reported()) { 2142 os::die(); 2143 } 2144 2145 os::signal_notify(sig); 2146 // We do not need to reinstate the signal handler each time... 2147 } 2148} 2149 2150void* os::user_handler() { 2151 return CAST_FROM_FN_PTR(void*, UserHandler); 2152} 2153 2154struct timespec PosixSemaphore::create_timespec(unsigned int sec, int nsec) { 2155 struct timespec ts; 2156 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2157 2158 return ts; 2159} 2160 2161extern "C" { 2162 typedef void (*sa_handler_t)(int); 2163 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2164} 2165 2166void* os::signal(int signal_number, void* handler) { 2167 struct sigaction sigAct, oldSigAct; 2168 sigfillset(&(sigAct.sa_mask)); 2169 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2170 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2171 2172 if (sigaction(signal_number, &sigAct, &oldSigAct)) { 2173 // -1 means registration failed 2174 return (void *)-1; 2175 } 2176 2177 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2178} 2179 2180void os::signal_raise(int signal_number) { 2181 raise(signal_number); 2182} 2183 2184// The following code is moved from os.cpp for making this 2185// code platform specific, which it is by its very nature. 2186 2187// a counter for each possible signal value 2188static int Sigexit = 0; 2189static int Maxlibjsigsigs; 2190static jint *pending_signals = NULL; 2191static int *preinstalled_sigs = NULL; 2192static struct sigaction *chainedsigactions = NULL; 2193static sema_t sig_sem; 2194typedef int (*version_getting_t)(); 2195version_getting_t os::Solaris::get_libjsig_version = NULL; 2196static int libjsigversion = NULL; 2197 2198int os::sigexitnum_pd() { 2199 assert(Sigexit > 0, "signal memory not yet initialized"); 2200 return Sigexit; 2201} 2202 2203void os::Solaris::init_signal_mem() { 2204 // Initialize signal structures 2205 Maxsignum = SIGRTMAX; 2206 Sigexit = Maxsignum+1; 2207 assert(Maxsignum >0, "Unable to obtain max signal number"); 2208 2209 Maxlibjsigsigs = Maxsignum; 2210 2211 // pending_signals has one int per signal 2212 // The additional signal is for SIGEXIT - exit signal to signal_thread 2213 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2214 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2215 2216 if (UseSignalChaining) { 2217 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2218 * (Maxsignum + 1), mtInternal); 2219 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2220 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2221 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2222 } 2223 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2224 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2225} 2226 2227void os::signal_init_pd() { 2228 int ret; 2229 2230 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2231 assert(ret == 0, "sema_init() failed"); 2232} 2233 2234void os::signal_notify(int signal_number) { 2235 int ret; 2236 2237 Atomic::inc(&pending_signals[signal_number]); 2238 ret = ::sema_post(&sig_sem); 2239 assert(ret == 0, "sema_post() failed"); 2240} 2241 2242static int check_pending_signals(bool wait_for_signal) { 2243 int ret; 2244 while (true) { 2245 for (int i = 0; i < Sigexit + 1; i++) { 2246 jint n = pending_signals[i]; 2247 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2248 return i; 2249 } 2250 } 2251 if (!wait_for_signal) { 2252 return -1; 2253 } 2254 JavaThread *thread = JavaThread::current(); 2255 ThreadBlockInVM tbivm(thread); 2256 2257 bool threadIsSuspended; 2258 do { 2259 thread->set_suspend_equivalent(); 2260 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2261 while ((ret = ::sema_wait(&sig_sem)) == EINTR) 2262 ; 2263 assert(ret == 0, "sema_wait() failed"); 2264 2265 // were we externally suspended while we were waiting? 2266 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2267 if (threadIsSuspended) { 2268 // The semaphore has been incremented, but while we were waiting 2269 // another thread suspended us. We don't want to continue running 2270 // while suspended because that would surprise the thread that 2271 // suspended us. 2272 ret = ::sema_post(&sig_sem); 2273 assert(ret == 0, "sema_post() failed"); 2274 2275 thread->java_suspend_self(); 2276 } 2277 } while (threadIsSuspended); 2278 } 2279} 2280 2281int os::signal_lookup() { 2282 return check_pending_signals(false); 2283} 2284 2285int os::signal_wait() { 2286 return check_pending_signals(true); 2287} 2288 2289//////////////////////////////////////////////////////////////////////////////// 2290// Virtual Memory 2291 2292static int page_size = -1; 2293 2294// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2295// clear this var if support is not available. 2296static bool has_map_align = true; 2297 2298int os::vm_page_size() { 2299 assert(page_size != -1, "must call os::init"); 2300 return page_size; 2301} 2302 2303// Solaris allocates memory by pages. 2304int os::vm_allocation_granularity() { 2305 assert(page_size != -1, "must call os::init"); 2306 return page_size; 2307} 2308 2309static bool recoverable_mmap_error(int err) { 2310 // See if the error is one we can let the caller handle. This 2311 // list of errno values comes from the Solaris mmap(2) man page. 2312 switch (err) { 2313 case EBADF: 2314 case EINVAL: 2315 case ENOTSUP: 2316 // let the caller deal with these errors 2317 return true; 2318 2319 default: 2320 // Any remaining errors on this OS can cause our reserved mapping 2321 // to be lost. That can cause confusion where different data 2322 // structures think they have the same memory mapped. The worst 2323 // scenario is if both the VM and a library think they have the 2324 // same memory mapped. 2325 return false; 2326 } 2327} 2328 2329static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2330 int err) { 2331 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2332 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2333 strerror(err), err); 2334} 2335 2336static void warn_fail_commit_memory(char* addr, size_t bytes, 2337 size_t alignment_hint, bool exec, 2338 int err) { 2339 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2340 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2341 alignment_hint, exec, strerror(err), err); 2342} 2343 2344int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2345 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2346 size_t size = bytes; 2347 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2348 if (res != NULL) { 2349 if (UseNUMAInterleaving) { 2350 numa_make_global(addr, bytes); 2351 } 2352 return 0; 2353 } 2354 2355 int err = errno; // save errno from mmap() call in mmap_chunk() 2356 2357 if (!recoverable_mmap_error(err)) { 2358 warn_fail_commit_memory(addr, bytes, exec, err); 2359 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2360 } 2361 2362 return err; 2363} 2364 2365bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2366 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2367} 2368 2369void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2370 const char* mesg) { 2371 assert(mesg != NULL, "mesg must be specified"); 2372 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2373 if (err != 0) { 2374 // the caller wants all commit errors to exit with the specified mesg: 2375 warn_fail_commit_memory(addr, bytes, exec, err); 2376 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2377 } 2378} 2379 2380size_t os::Solaris::page_size_for_alignment(size_t alignment) { 2381 assert(is_size_aligned(alignment, (size_t) vm_page_size()), 2382 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, 2383 alignment, (size_t) vm_page_size()); 2384 2385 for (int i = 0; _page_sizes[i] != 0; i++) { 2386 if (is_size_aligned(alignment, _page_sizes[i])) { 2387 return _page_sizes[i]; 2388 } 2389 } 2390 2391 return (size_t) vm_page_size(); 2392} 2393 2394int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2395 size_t alignment_hint, bool exec) { 2396 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2397 if (err == 0 && UseLargePages && alignment_hint > 0) { 2398 assert(is_size_aligned(bytes, alignment_hint), 2399 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint); 2400 2401 // The syscall memcntl requires an exact page size (see man memcntl for details). 2402 size_t page_size = page_size_for_alignment(alignment_hint); 2403 if (page_size > (size_t) vm_page_size()) { 2404 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2405 } 2406 } 2407 return err; 2408} 2409 2410bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2411 bool exec) { 2412 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2413} 2414 2415void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2416 size_t alignment_hint, bool exec, 2417 const char* mesg) { 2418 assert(mesg != NULL, "mesg must be specified"); 2419 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2420 if (err != 0) { 2421 // the caller wants all commit errors to exit with the specified mesg: 2422 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2423 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2424 } 2425} 2426 2427// Uncommit the pages in a specified region. 2428void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2429 if (madvise(addr, bytes, MADV_FREE) < 0) { 2430 debug_only(warning("MADV_FREE failed.")); 2431 return; 2432 } 2433} 2434 2435bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2436 return os::commit_memory(addr, size, !ExecMem); 2437} 2438 2439bool os::remove_stack_guard_pages(char* addr, size_t size) { 2440 return os::uncommit_memory(addr, size); 2441} 2442 2443// Change the page size in a given range. 2444void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2445 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2446 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2447 if (UseLargePages) { 2448 size_t page_size = Solaris::page_size_for_alignment(alignment_hint); 2449 if (page_size > (size_t) vm_page_size()) { 2450 Solaris::setup_large_pages(addr, bytes, page_size); 2451 } 2452 } 2453} 2454 2455// Tell the OS to make the range local to the first-touching LWP 2456void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2457 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2458 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2459 debug_only(warning("MADV_ACCESS_LWP failed.")); 2460 } 2461} 2462 2463// Tell the OS that this range would be accessed from different LWPs. 2464void os::numa_make_global(char *addr, size_t bytes) { 2465 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2466 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2467 debug_only(warning("MADV_ACCESS_MANY failed.")); 2468 } 2469} 2470 2471// Get the number of the locality groups. 2472size_t os::numa_get_groups_num() { 2473 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2474 return n != -1 ? n : 1; 2475} 2476 2477// Get a list of leaf locality groups. A leaf lgroup is group that 2478// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2479// board. An LWP is assigned to one of these groups upon creation. 2480size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2481 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2482 ids[0] = 0; 2483 return 1; 2484 } 2485 int result_size = 0, top = 1, bottom = 0, cur = 0; 2486 for (int k = 0; k < size; k++) { 2487 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2488 (Solaris::lgrp_id_t*)&ids[top], size - top); 2489 if (r == -1) { 2490 ids[0] = 0; 2491 return 1; 2492 } 2493 if (!r) { 2494 // That's a leaf node. 2495 assert(bottom <= cur, "Sanity check"); 2496 // Check if the node has memory 2497 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2498 NULL, 0, LGRP_RSRC_MEM) > 0) { 2499 ids[bottom++] = ids[cur]; 2500 } 2501 } 2502 top += r; 2503 cur++; 2504 } 2505 if (bottom == 0) { 2506 // Handle a situation, when the OS reports no memory available. 2507 // Assume UMA architecture. 2508 ids[0] = 0; 2509 return 1; 2510 } 2511 return bottom; 2512} 2513 2514// Detect the topology change. Typically happens during CPU plugging-unplugging. 2515bool os::numa_topology_changed() { 2516 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2517 if (is_stale != -1 && is_stale) { 2518 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2519 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2520 assert(c != 0, "Failure to initialize LGRP API"); 2521 Solaris::set_lgrp_cookie(c); 2522 return true; 2523 } 2524 return false; 2525} 2526 2527// Get the group id of the current LWP. 2528int os::numa_get_group_id() { 2529 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2530 if (lgrp_id == -1) { 2531 return 0; 2532 } 2533 const int size = os::numa_get_groups_num(); 2534 int *ids = (int*)alloca(size * sizeof(int)); 2535 2536 // Get the ids of all lgroups with memory; r is the count. 2537 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2538 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2539 if (r <= 0) { 2540 return 0; 2541 } 2542 return ids[os::random() % r]; 2543} 2544 2545// Request information about the page. 2546bool os::get_page_info(char *start, page_info* info) { 2547 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2548 uint64_t addr = (uintptr_t)start; 2549 uint64_t outdata[2]; 2550 uint_t validity = 0; 2551 2552 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2553 return false; 2554 } 2555 2556 info->size = 0; 2557 info->lgrp_id = -1; 2558 2559 if ((validity & 1) != 0) { 2560 if ((validity & 2) != 0) { 2561 info->lgrp_id = outdata[0]; 2562 } 2563 if ((validity & 4) != 0) { 2564 info->size = outdata[1]; 2565 } 2566 return true; 2567 } 2568 return false; 2569} 2570 2571// Scan the pages from start to end until a page different than 2572// the one described in the info parameter is encountered. 2573char *os::scan_pages(char *start, char* end, page_info* page_expected, 2574 page_info* page_found) { 2575 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2576 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2577 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1]; 2578 uint_t validity[MAX_MEMINFO_CNT]; 2579 2580 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2581 uint64_t p = (uint64_t)start; 2582 while (p < (uint64_t)end) { 2583 addrs[0] = p; 2584 size_t addrs_count = 1; 2585 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2586 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2587 addrs_count++; 2588 } 2589 2590 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2591 return NULL; 2592 } 2593 2594 size_t i = 0; 2595 for (; i < addrs_count; i++) { 2596 if ((validity[i] & 1) != 0) { 2597 if ((validity[i] & 4) != 0) { 2598 if (outdata[types * i + 1] != page_expected->size) { 2599 break; 2600 } 2601 } else if (page_expected->size != 0) { 2602 break; 2603 } 2604 2605 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2606 if (outdata[types * i] != page_expected->lgrp_id) { 2607 break; 2608 } 2609 } 2610 } else { 2611 return NULL; 2612 } 2613 } 2614 2615 if (i < addrs_count) { 2616 if ((validity[i] & 2) != 0) { 2617 page_found->lgrp_id = outdata[types * i]; 2618 } else { 2619 page_found->lgrp_id = -1; 2620 } 2621 if ((validity[i] & 4) != 0) { 2622 page_found->size = outdata[types * i + 1]; 2623 } else { 2624 page_found->size = 0; 2625 } 2626 return (char*)addrs[i]; 2627 } 2628 2629 p = addrs[addrs_count - 1] + page_size; 2630 } 2631 return end; 2632} 2633 2634bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2635 size_t size = bytes; 2636 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2637 // uncommitted page. Otherwise, the read/write might succeed if we 2638 // have enough swap space to back the physical page. 2639 return 2640 NULL != Solaris::mmap_chunk(addr, size, 2641 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2642 PROT_NONE); 2643} 2644 2645char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2646 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2647 2648 if (b == MAP_FAILED) { 2649 return NULL; 2650 } 2651 return b; 2652} 2653 2654char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, 2655 size_t alignment_hint, bool fixed) { 2656 char* addr = requested_addr; 2657 int flags = MAP_PRIVATE | MAP_NORESERVE; 2658 2659 assert(!(fixed && (alignment_hint > 0)), 2660 "alignment hint meaningless with fixed mmap"); 2661 2662 if (fixed) { 2663 flags |= MAP_FIXED; 2664 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2665 flags |= MAP_ALIGN; 2666 addr = (char*) alignment_hint; 2667 } 2668 2669 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2670 // uncommitted page. Otherwise, the read/write might succeed if we 2671 // have enough swap space to back the physical page. 2672 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2673} 2674 2675char* os::pd_reserve_memory(size_t bytes, char* requested_addr, 2676 size_t alignment_hint) { 2677 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, 2678 (requested_addr != NULL)); 2679 2680 guarantee(requested_addr == NULL || requested_addr == addr, 2681 "OS failed to return requested mmap address."); 2682 return addr; 2683} 2684 2685// Reserve memory at an arbitrary address, only if that area is 2686// available (and not reserved for something else). 2687 2688char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2689 const int max_tries = 10; 2690 char* base[max_tries]; 2691 size_t size[max_tries]; 2692 2693 // Solaris adds a gap between mmap'ed regions. The size of the gap 2694 // is dependent on the requested size and the MMU. Our initial gap 2695 // value here is just a guess and will be corrected later. 2696 bool had_top_overlap = false; 2697 bool have_adjusted_gap = false; 2698 size_t gap = 0x400000; 2699 2700 // Assert only that the size is a multiple of the page size, since 2701 // that's all that mmap requires, and since that's all we really know 2702 // about at this low abstraction level. If we need higher alignment, 2703 // we can either pass an alignment to this method or verify alignment 2704 // in one of the methods further up the call chain. See bug 5044738. 2705 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2706 2707 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2708 // Give it a try, if the kernel honors the hint we can return immediately. 2709 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2710 2711 volatile int err = errno; 2712 if (addr == requested_addr) { 2713 return addr; 2714 } else if (addr != NULL) { 2715 pd_unmap_memory(addr, bytes); 2716 } 2717 2718 if (PrintMiscellaneous && Verbose) { 2719 char buf[256]; 2720 buf[0] = '\0'; 2721 if (addr == NULL) { 2722 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2723 } 2724 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 2725 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2726 "%s", bytes, requested_addr, addr, buf); 2727 } 2728 2729 // Address hint method didn't work. Fall back to the old method. 2730 // In theory, once SNV becomes our oldest supported platform, this 2731 // code will no longer be needed. 2732 // 2733 // Repeatedly allocate blocks until the block is allocated at the 2734 // right spot. Give up after max_tries. 2735 int i; 2736 for (i = 0; i < max_tries; ++i) { 2737 base[i] = reserve_memory(bytes); 2738 2739 if (base[i] != NULL) { 2740 // Is this the block we wanted? 2741 if (base[i] == requested_addr) { 2742 size[i] = bytes; 2743 break; 2744 } 2745 2746 // check that the gap value is right 2747 if (had_top_overlap && !have_adjusted_gap) { 2748 size_t actual_gap = base[i-1] - base[i] - bytes; 2749 if (gap != actual_gap) { 2750 // adjust the gap value and retry the last 2 allocations 2751 assert(i > 0, "gap adjustment code problem"); 2752 have_adjusted_gap = true; // adjust the gap only once, just in case 2753 gap = actual_gap; 2754 if (PrintMiscellaneous && Verbose) { 2755 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2756 } 2757 unmap_memory(base[i], bytes); 2758 unmap_memory(base[i-1], size[i-1]); 2759 i-=2; 2760 continue; 2761 } 2762 } 2763 2764 // Does this overlap the block we wanted? Give back the overlapped 2765 // parts and try again. 2766 // 2767 // There is still a bug in this code: if top_overlap == bytes, 2768 // the overlap is offset from requested region by the value of gap. 2769 // In this case giving back the overlapped part will not work, 2770 // because we'll give back the entire block at base[i] and 2771 // therefore the subsequent allocation will not generate a new gap. 2772 // This could be fixed with a new algorithm that used larger 2773 // or variable size chunks to find the requested region - 2774 // but such a change would introduce additional complications. 2775 // It's rare enough that the planets align for this bug, 2776 // so we'll just wait for a fix for 6204603/5003415 which 2777 // will provide a mmap flag to allow us to avoid this business. 2778 2779 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2780 if (top_overlap >= 0 && top_overlap < bytes) { 2781 had_top_overlap = true; 2782 unmap_memory(base[i], top_overlap); 2783 base[i] += top_overlap; 2784 size[i] = bytes - top_overlap; 2785 } else { 2786 size_t bottom_overlap = base[i] + bytes - requested_addr; 2787 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2788 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2789 warning("attempt_reserve_memory_at: possible alignment bug"); 2790 } 2791 unmap_memory(requested_addr, bottom_overlap); 2792 size[i] = bytes - bottom_overlap; 2793 } else { 2794 size[i] = bytes; 2795 } 2796 } 2797 } 2798 } 2799 2800 // Give back the unused reserved pieces. 2801 2802 for (int j = 0; j < i; ++j) { 2803 if (base[j] != NULL) { 2804 unmap_memory(base[j], size[j]); 2805 } 2806 } 2807 2808 return (i < max_tries) ? requested_addr : NULL; 2809} 2810 2811bool os::pd_release_memory(char* addr, size_t bytes) { 2812 size_t size = bytes; 2813 return munmap(addr, size) == 0; 2814} 2815 2816static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2817 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2818 "addr must be page aligned"); 2819 int retVal = mprotect(addr, bytes, prot); 2820 return retVal == 0; 2821} 2822 2823// Protect memory (Used to pass readonly pages through 2824// JNI GetArray<type>Elements with empty arrays.) 2825// Also, used for serialization page and for compressed oops null pointer 2826// checking. 2827bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2828 bool is_committed) { 2829 unsigned int p = 0; 2830 switch (prot) { 2831 case MEM_PROT_NONE: p = PROT_NONE; break; 2832 case MEM_PROT_READ: p = PROT_READ; break; 2833 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2834 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2835 default: 2836 ShouldNotReachHere(); 2837 } 2838 // is_committed is unused. 2839 return solaris_mprotect(addr, bytes, p); 2840} 2841 2842// guard_memory and unguard_memory only happens within stack guard pages. 2843// Since ISM pertains only to the heap, guard and unguard memory should not 2844/// happen with an ISM region. 2845bool os::guard_memory(char* addr, size_t bytes) { 2846 return solaris_mprotect(addr, bytes, PROT_NONE); 2847} 2848 2849bool os::unguard_memory(char* addr, size_t bytes) { 2850 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 2851} 2852 2853// Large page support 2854static size_t _large_page_size = 0; 2855 2856// Insertion sort for small arrays (descending order). 2857static void insertion_sort_descending(size_t* array, int len) { 2858 for (int i = 0; i < len; i++) { 2859 size_t val = array[i]; 2860 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 2861 size_t tmp = array[key]; 2862 array[key] = array[key - 1]; 2863 array[key - 1] = tmp; 2864 } 2865 } 2866} 2867 2868bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 2869 const unsigned int usable_count = VM_Version::page_size_count(); 2870 if (usable_count == 1) { 2871 return false; 2872 } 2873 2874 // Find the right getpagesizes interface. When solaris 11 is the minimum 2875 // build platform, getpagesizes() (without the '2') can be called directly. 2876 typedef int (*gps_t)(size_t[], int); 2877 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 2878 if (gps_func == NULL) { 2879 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 2880 if (gps_func == NULL) { 2881 if (warn) { 2882 warning("MPSS is not supported by the operating system."); 2883 } 2884 return false; 2885 } 2886 } 2887 2888 // Fill the array of page sizes. 2889 int n = (*gps_func)(_page_sizes, page_sizes_max); 2890 assert(n > 0, "Solaris bug?"); 2891 2892 if (n == page_sizes_max) { 2893 // Add a sentinel value (necessary only if the array was completely filled 2894 // since it is static (zeroed at initialization)). 2895 _page_sizes[--n] = 0; 2896 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 2897 } 2898 assert(_page_sizes[n] == 0, "missing sentinel"); 2899 trace_page_sizes("available page sizes", _page_sizes, n); 2900 2901 if (n == 1) return false; // Only one page size available. 2902 2903 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 2904 // select up to usable_count elements. First sort the array, find the first 2905 // acceptable value, then copy the usable sizes to the top of the array and 2906 // trim the rest. Make sure to include the default page size :-). 2907 // 2908 // A better policy could get rid of the 4M limit by taking the sizes of the 2909 // important VM memory regions (java heap and possibly the code cache) into 2910 // account. 2911 insertion_sort_descending(_page_sizes, n); 2912 const size_t size_limit = 2913 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 2914 int beg; 2915 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */; 2916 const int end = MIN2((int)usable_count, n) - 1; 2917 for (int cur = 0; cur < end; ++cur, ++beg) { 2918 _page_sizes[cur] = _page_sizes[beg]; 2919 } 2920 _page_sizes[end] = vm_page_size(); 2921 _page_sizes[end + 1] = 0; 2922 2923 if (_page_sizes[end] > _page_sizes[end - 1]) { 2924 // Default page size is not the smallest; sort again. 2925 insertion_sort_descending(_page_sizes, end + 1); 2926 } 2927 *page_size = _page_sizes[0]; 2928 2929 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 2930 return true; 2931} 2932 2933void os::large_page_init() { 2934 if (UseLargePages) { 2935 // print a warning if any large page related flag is specified on command line 2936 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 2937 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 2938 2939 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 2940 } 2941} 2942 2943bool os::Solaris::is_valid_page_size(size_t bytes) { 2944 for (int i = 0; _page_sizes[i] != 0; i++) { 2945 if (_page_sizes[i] == bytes) { 2946 return true; 2947 } 2948 } 2949 return false; 2950} 2951 2952bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 2953 assert(is_valid_page_size(align), SIZE_FORMAT " is not a valid page size", align); 2954 assert(is_ptr_aligned((void*) start, align), 2955 PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align); 2956 assert(is_size_aligned(bytes, align), 2957 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align); 2958 2959 // Signal to OS that we want large pages for addresses 2960 // from addr, addr + bytes 2961 struct memcntl_mha mpss_struct; 2962 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 2963 mpss_struct.mha_pagesize = align; 2964 mpss_struct.mha_flags = 0; 2965 // Upon successful completion, memcntl() returns 0 2966 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 2967 debug_only(warning("Attempt to use MPSS failed.")); 2968 return false; 2969 } 2970 return true; 2971} 2972 2973char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 2974 fatal("os::reserve_memory_special should not be called on Solaris."); 2975 return NULL; 2976} 2977 2978bool os::release_memory_special(char* base, size_t bytes) { 2979 fatal("os::release_memory_special should not be called on Solaris."); 2980 return false; 2981} 2982 2983size_t os::large_page_size() { 2984 return _large_page_size; 2985} 2986 2987// MPSS allows application to commit large page memory on demand; with ISM 2988// the entire memory region must be allocated as shared memory. 2989bool os::can_commit_large_page_memory() { 2990 return true; 2991} 2992 2993bool os::can_execute_large_page_memory() { 2994 return true; 2995} 2996 2997// Read calls from inside the vm need to perform state transitions 2998size_t os::read(int fd, void *buf, unsigned int nBytes) { 2999 size_t res; 3000 JavaThread* thread = (JavaThread*)Thread::current(); 3001 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3002 ThreadBlockInVM tbiv(thread); 3003 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3004 return res; 3005} 3006 3007size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) { 3008 size_t res; 3009 JavaThread* thread = (JavaThread*)Thread::current(); 3010 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3011 ThreadBlockInVM tbiv(thread); 3012 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res); 3013 return res; 3014} 3015 3016size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3017 size_t res; 3018 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 3019 "Assumed _thread_in_native"); 3020 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3021 return res; 3022} 3023 3024void os::naked_short_sleep(jlong ms) { 3025 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 3026 3027 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 3028 // Solaris requires -lrt for this. 3029 usleep((ms * 1000)); 3030 3031 return; 3032} 3033 3034// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3035void os::infinite_sleep() { 3036 while (true) { // sleep forever ... 3037 ::sleep(100); // ... 100 seconds at a time 3038 } 3039} 3040 3041// Used to convert frequent JVM_Yield() to nops 3042bool os::dont_yield() { 3043 if (DontYieldALot) { 3044 static hrtime_t last_time = 0; 3045 hrtime_t diff = getTimeNanos() - last_time; 3046 3047 if (diff < DontYieldALotInterval * 1000000) { 3048 return true; 3049 } 3050 3051 last_time += diff; 3052 3053 return false; 3054 } else { 3055 return false; 3056 } 3057} 3058 3059// Note that yield semantics are defined by the scheduling class to which 3060// the thread currently belongs. Typically, yield will _not yield to 3061// other equal or higher priority threads that reside on the dispatch queues 3062// of other CPUs. 3063 3064void os::naked_yield() { 3065 thr_yield(); 3066} 3067 3068// Interface for setting lwp priorities. If we are using T2 libthread, 3069// which forces the use of BoundThreads or we manually set UseBoundThreads, 3070// all of our threads will be assigned to real lwp's. Using the thr_setprio 3071// function is meaningless in this mode so we must adjust the real lwp's priority 3072// The routines below implement the getting and setting of lwp priorities. 3073// 3074// Note: T2 is now the only supported libthread. UseBoundThreads flag is 3075// being deprecated and all threads are now BoundThreads 3076// 3077// Note: There are three priority scales used on Solaris. Java priotities 3078// which range from 1 to 10, libthread "thr_setprio" scale which range 3079// from 0 to 127, and the current scheduling class of the process we 3080// are running in. This is typically from -60 to +60. 3081// The setting of the lwp priorities in done after a call to thr_setprio 3082// so Java priorities are mapped to libthread priorities and we map from 3083// the latter to lwp priorities. We don't keep priorities stored in 3084// Java priorities since some of our worker threads want to set priorities 3085// higher than all Java threads. 3086// 3087// For related information: 3088// (1) man -s 2 priocntl 3089// (2) man -s 4 priocntl 3090// (3) man dispadmin 3091// = librt.so 3092// = libthread/common/rtsched.c - thrp_setlwpprio(). 3093// = ps -cL <pid> ... to validate priority. 3094// = sched_get_priority_min and _max 3095// pthread_create 3096// sched_setparam 3097// pthread_setschedparam 3098// 3099// Assumptions: 3100// + We assume that all threads in the process belong to the same 3101// scheduling class. IE. an homogenous process. 3102// + Must be root or in IA group to change change "interactive" attribute. 3103// Priocntl() will fail silently. The only indication of failure is when 3104// we read-back the value and notice that it hasn't changed. 3105// + Interactive threads enter the runq at the head, non-interactive at the tail. 3106// + For RT, change timeslice as well. Invariant: 3107// constant "priority integral" 3108// Konst == TimeSlice * (60-Priority) 3109// Given a priority, compute appropriate timeslice. 3110// + Higher numerical values have higher priority. 3111 3112// sched class attributes 3113typedef struct { 3114 int schedPolicy; // classID 3115 int maxPrio; 3116 int minPrio; 3117} SchedInfo; 3118 3119 3120static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3121 3122#ifdef ASSERT 3123static int ReadBackValidate = 1; 3124#endif 3125static int myClass = 0; 3126static int myMin = 0; 3127static int myMax = 0; 3128static int myCur = 0; 3129static bool priocntl_enable = false; 3130 3131static const int criticalPrio = FXCriticalPriority; 3132static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3133 3134 3135// lwp_priocntl_init 3136// 3137// Try to determine the priority scale for our process. 3138// 3139// Return errno or 0 if OK. 3140// 3141static int lwp_priocntl_init() { 3142 int rslt; 3143 pcinfo_t ClassInfo; 3144 pcparms_t ParmInfo; 3145 int i; 3146 3147 if (!UseThreadPriorities) return 0; 3148 3149 // If ThreadPriorityPolicy is 1, switch tables 3150 if (ThreadPriorityPolicy == 1) { 3151 for (i = 0; i < CriticalPriority+1; i++) 3152 os::java_to_os_priority[i] = prio_policy1[i]; 3153 } 3154 if (UseCriticalJavaThreadPriority) { 3155 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3156 // See set_native_priority() and set_lwp_class_and_priority(). 3157 // Save original MaxPriority mapping in case attempt to 3158 // use critical priority fails. 3159 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3160 // Set negative to distinguish from other priorities 3161 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3162 } 3163 3164 // Get IDs for a set of well-known scheduling classes. 3165 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3166 // the system. We should have a loop that iterates over the 3167 // classID values, which are known to be "small" integers. 3168 3169 strcpy(ClassInfo.pc_clname, "TS"); 3170 ClassInfo.pc_cid = -1; 3171 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3172 if (rslt < 0) return errno; 3173 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3174 tsLimits.schedPolicy = ClassInfo.pc_cid; 3175 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3176 tsLimits.minPrio = -tsLimits.maxPrio; 3177 3178 strcpy(ClassInfo.pc_clname, "IA"); 3179 ClassInfo.pc_cid = -1; 3180 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3181 if (rslt < 0) return errno; 3182 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3183 iaLimits.schedPolicy = ClassInfo.pc_cid; 3184 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3185 iaLimits.minPrio = -iaLimits.maxPrio; 3186 3187 strcpy(ClassInfo.pc_clname, "RT"); 3188 ClassInfo.pc_cid = -1; 3189 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3190 if (rslt < 0) return errno; 3191 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3192 rtLimits.schedPolicy = ClassInfo.pc_cid; 3193 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3194 rtLimits.minPrio = 0; 3195 3196 strcpy(ClassInfo.pc_clname, "FX"); 3197 ClassInfo.pc_cid = -1; 3198 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3199 if (rslt < 0) return errno; 3200 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3201 fxLimits.schedPolicy = ClassInfo.pc_cid; 3202 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3203 fxLimits.minPrio = 0; 3204 3205 // Query our "current" scheduling class. 3206 // This will normally be IA, TS or, rarely, FX or RT. 3207 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3208 ParmInfo.pc_cid = PC_CLNULL; 3209 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3210 if (rslt < 0) return errno; 3211 myClass = ParmInfo.pc_cid; 3212 3213 // We now know our scheduling classId, get specific information 3214 // about the class. 3215 ClassInfo.pc_cid = myClass; 3216 ClassInfo.pc_clname[0] = 0; 3217 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3218 if (rslt < 0) return errno; 3219 3220 if (ThreadPriorityVerbose) { 3221 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3222 } 3223 3224 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3225 ParmInfo.pc_cid = PC_CLNULL; 3226 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3227 if (rslt < 0) return errno; 3228 3229 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3230 myMin = rtLimits.minPrio; 3231 myMax = rtLimits.maxPrio; 3232 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3233 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3234 myMin = iaLimits.minPrio; 3235 myMax = iaLimits.maxPrio; 3236 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3237 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3238 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3239 myMin = tsLimits.minPrio; 3240 myMax = tsLimits.maxPrio; 3241 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3242 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3243 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3244 myMin = fxLimits.minPrio; 3245 myMax = fxLimits.maxPrio; 3246 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3247 } else { 3248 // No clue - punt 3249 if (ThreadPriorityVerbose) { 3250 tty->print_cr("Unknown scheduling class: %s ... \n", 3251 ClassInfo.pc_clname); 3252 } 3253 return EINVAL; // no clue, punt 3254 } 3255 3256 if (ThreadPriorityVerbose) { 3257 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax); 3258 } 3259 3260 priocntl_enable = true; // Enable changing priorities 3261 return 0; 3262} 3263 3264#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3265#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3266#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3267#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3268 3269 3270// scale_to_lwp_priority 3271// 3272// Convert from the libthread "thr_setprio" scale to our current 3273// lwp scheduling class scale. 3274// 3275static int scale_to_lwp_priority(int rMin, int rMax, int x) { 3276 int v; 3277 3278 if (x == 127) return rMax; // avoid round-down 3279 v = (((x*(rMax-rMin)))/128)+rMin; 3280 return v; 3281} 3282 3283 3284// set_lwp_class_and_priority 3285int set_lwp_class_and_priority(int ThreadID, int lwpid, 3286 int newPrio, int new_class, bool scale) { 3287 int rslt; 3288 int Actual, Expected, prv; 3289 pcparms_t ParmInfo; // for GET-SET 3290#ifdef ASSERT 3291 pcparms_t ReadBack; // for readback 3292#endif 3293 3294 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3295 // Query current values. 3296 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3297 // Cache "pcparms_t" in global ParmCache. 3298 // TODO: elide set-to-same-value 3299 3300 // If something went wrong on init, don't change priorities. 3301 if (!priocntl_enable) { 3302 if (ThreadPriorityVerbose) { 3303 tty->print_cr("Trying to set priority but init failed, ignoring"); 3304 } 3305 return EINVAL; 3306 } 3307 3308 // If lwp hasn't started yet, just return 3309 // the _start routine will call us again. 3310 if (lwpid <= 0) { 3311 if (ThreadPriorityVerbose) { 3312 tty->print_cr("deferring the set_lwp_class_and_priority of thread " 3313 INTPTR_FORMAT " to %d, lwpid not set", 3314 ThreadID, newPrio); 3315 } 3316 return 0; 3317 } 3318 3319 if (ThreadPriorityVerbose) { 3320 tty->print_cr ("set_lwp_class_and_priority(" 3321 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3322 ThreadID, lwpid, newPrio); 3323 } 3324 3325 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3326 ParmInfo.pc_cid = PC_CLNULL; 3327 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3328 if (rslt < 0) return errno; 3329 3330 int cur_class = ParmInfo.pc_cid; 3331 ParmInfo.pc_cid = (id_t)new_class; 3332 3333 if (new_class == rtLimits.schedPolicy) { 3334 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3335 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3336 rtLimits.maxPrio, newPrio) 3337 : newPrio; 3338 rtInfo->rt_tqsecs = RT_NOCHANGE; 3339 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3340 if (ThreadPriorityVerbose) { 3341 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3342 } 3343 } else if (new_class == iaLimits.schedPolicy) { 3344 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3345 int maxClamped = MIN2(iaLimits.maxPrio, 3346 cur_class == new_class 3347 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3348 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3349 maxClamped, newPrio) 3350 : newPrio; 3351 iaInfo->ia_uprilim = cur_class == new_class 3352 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3353 iaInfo->ia_mode = IA_NOCHANGE; 3354 if (ThreadPriorityVerbose) { 3355 tty->print_cr("IA: [%d...%d] %d->%d\n", 3356 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3357 } 3358 } else if (new_class == tsLimits.schedPolicy) { 3359 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3360 int maxClamped = MIN2(tsLimits.maxPrio, 3361 cur_class == new_class 3362 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3363 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3364 maxClamped, newPrio) 3365 : newPrio; 3366 tsInfo->ts_uprilim = cur_class == new_class 3367 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3368 if (ThreadPriorityVerbose) { 3369 tty->print_cr("TS: [%d...%d] %d->%d\n", 3370 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3371 } 3372 } else if (new_class == fxLimits.schedPolicy) { 3373 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3374 int maxClamped = MIN2(fxLimits.maxPrio, 3375 cur_class == new_class 3376 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3377 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3378 maxClamped, newPrio) 3379 : newPrio; 3380 fxInfo->fx_uprilim = cur_class == new_class 3381 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3382 fxInfo->fx_tqsecs = FX_NOCHANGE; 3383 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3384 if (ThreadPriorityVerbose) { 3385 tty->print_cr("FX: [%d...%d] %d->%d\n", 3386 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3387 } 3388 } else { 3389 if (ThreadPriorityVerbose) { 3390 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3391 } 3392 return EINVAL; // no clue, punt 3393 } 3394 3395 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3396 if (ThreadPriorityVerbose && rslt) { 3397 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3398 } 3399 if (rslt < 0) return errno; 3400 3401#ifdef ASSERT 3402 // Sanity check: read back what we just attempted to set. 3403 // In theory it could have changed in the interim ... 3404 // 3405 // The priocntl system call is tricky. 3406 // Sometimes it'll validate the priority value argument and 3407 // return EINVAL if unhappy. At other times it fails silently. 3408 // Readbacks are prudent. 3409 3410 if (!ReadBackValidate) return 0; 3411 3412 memset(&ReadBack, 0, sizeof(pcparms_t)); 3413 ReadBack.pc_cid = PC_CLNULL; 3414 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3415 assert(rslt >= 0, "priocntl failed"); 3416 Actual = Expected = 0xBAD; 3417 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3418 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3419 Actual = RTPRI(ReadBack)->rt_pri; 3420 Expected = RTPRI(ParmInfo)->rt_pri; 3421 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3422 Actual = IAPRI(ReadBack)->ia_upri; 3423 Expected = IAPRI(ParmInfo)->ia_upri; 3424 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3425 Actual = TSPRI(ReadBack)->ts_upri; 3426 Expected = TSPRI(ParmInfo)->ts_upri; 3427 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3428 Actual = FXPRI(ReadBack)->fx_upri; 3429 Expected = FXPRI(ParmInfo)->fx_upri; 3430 } else { 3431 if (ThreadPriorityVerbose) { 3432 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 3433 ParmInfo.pc_cid); 3434 } 3435 } 3436 3437 if (Actual != Expected) { 3438 if (ThreadPriorityVerbose) { 3439 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3440 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3441 } 3442 } 3443#endif 3444 3445 return 0; 3446} 3447 3448// Solaris only gives access to 128 real priorities at a time, 3449// so we expand Java's ten to fill this range. This would be better 3450// if we dynamically adjusted relative priorities. 3451// 3452// The ThreadPriorityPolicy option allows us to select 2 different 3453// priority scales. 3454// 3455// ThreadPriorityPolicy=0 3456// Since the Solaris' default priority is MaximumPriority, we do not 3457// set a priority lower than Max unless a priority lower than 3458// NormPriority is requested. 3459// 3460// ThreadPriorityPolicy=1 3461// This mode causes the priority table to get filled with 3462// linear values. NormPriority get's mapped to 50% of the 3463// Maximum priority an so on. This will cause VM threads 3464// to get unfair treatment against other Solaris processes 3465// which do not explicitly alter their thread priorities. 3466 3467int os::java_to_os_priority[CriticalPriority + 1] = { 3468 -99999, // 0 Entry should never be used 3469 3470 0, // 1 MinPriority 3471 32, // 2 3472 64, // 3 3473 3474 96, // 4 3475 127, // 5 NormPriority 3476 127, // 6 3477 3478 127, // 7 3479 127, // 8 3480 127, // 9 NearMaxPriority 3481 3482 127, // 10 MaxPriority 3483 3484 -criticalPrio // 11 CriticalPriority 3485}; 3486 3487OSReturn os::set_native_priority(Thread* thread, int newpri) { 3488 OSThread* osthread = thread->osthread(); 3489 3490 // Save requested priority in case the thread hasn't been started 3491 osthread->set_native_priority(newpri); 3492 3493 // Check for critical priority request 3494 bool fxcritical = false; 3495 if (newpri == -criticalPrio) { 3496 fxcritical = true; 3497 newpri = criticalPrio; 3498 } 3499 3500 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3501 if (!UseThreadPriorities) return OS_OK; 3502 3503 int status = 0; 3504 3505 if (!fxcritical) { 3506 // Use thr_setprio only if we have a priority that thr_setprio understands 3507 status = thr_setprio(thread->osthread()->thread_id(), newpri); 3508 } 3509 3510 int lwp_status = 3511 set_lwp_class_and_priority(osthread->thread_id(), 3512 osthread->lwp_id(), 3513 newpri, 3514 fxcritical ? fxLimits.schedPolicy : myClass, 3515 !fxcritical); 3516 if (lwp_status != 0 && fxcritical) { 3517 // Try again, this time without changing the scheduling class 3518 newpri = java_MaxPriority_to_os_priority; 3519 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 3520 osthread->lwp_id(), 3521 newpri, myClass, false); 3522 } 3523 status |= lwp_status; 3524 return (status == 0) ? OS_OK : OS_ERR; 3525} 3526 3527 3528OSReturn os::get_native_priority(const Thread* const thread, 3529 int *priority_ptr) { 3530 int p; 3531 if (!UseThreadPriorities) { 3532 *priority_ptr = NormalPriority; 3533 return OS_OK; 3534 } 3535 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3536 if (status != 0) { 3537 return OS_ERR; 3538 } 3539 *priority_ptr = p; 3540 return OS_OK; 3541} 3542 3543 3544// Hint to the underlying OS that a task switch would not be good. 3545// Void return because it's a hint and can fail. 3546void os::hint_no_preempt() { 3547 schedctl_start(schedctl_init()); 3548} 3549 3550static void resume_clear_context(OSThread *osthread) { 3551 osthread->set_ucontext(NULL); 3552} 3553 3554static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 3555 osthread->set_ucontext(context); 3556} 3557 3558static PosixSemaphore sr_semaphore; 3559 3560void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) { 3561 // Save and restore errno to avoid confusing native code with EINTR 3562 // after sigsuspend. 3563 int old_errno = errno; 3564 3565 OSThread* osthread = thread->osthread(); 3566 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 3567 3568 os::SuspendResume::State current = osthread->sr.state(); 3569 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 3570 suspend_save_context(osthread, uc); 3571 3572 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 3573 os::SuspendResume::State state = osthread->sr.suspended(); 3574 if (state == os::SuspendResume::SR_SUSPENDED) { 3575 sigset_t suspend_set; // signals for sigsuspend() 3576 3577 // get current set of blocked signals and unblock resume signal 3578 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set); 3579 sigdelset(&suspend_set, os::Solaris::SIGasync()); 3580 3581 sr_semaphore.signal(); 3582 // wait here until we are resumed 3583 while (1) { 3584 sigsuspend(&suspend_set); 3585 3586 os::SuspendResume::State result = osthread->sr.running(); 3587 if (result == os::SuspendResume::SR_RUNNING) { 3588 sr_semaphore.signal(); 3589 break; 3590 } 3591 } 3592 3593 } else if (state == os::SuspendResume::SR_RUNNING) { 3594 // request was cancelled, continue 3595 } else { 3596 ShouldNotReachHere(); 3597 } 3598 3599 resume_clear_context(osthread); 3600 } else if (current == os::SuspendResume::SR_RUNNING) { 3601 // request was cancelled, continue 3602 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 3603 // ignore 3604 } else { 3605 // ignore 3606 } 3607 3608 errno = old_errno; 3609} 3610 3611void os::print_statistics() { 3612} 3613 3614bool os::message_box(const char* title, const char* message) { 3615 int i; 3616 fdStream err(defaultStream::error_fd()); 3617 for (i = 0; i < 78; i++) err.print_raw("="); 3618 err.cr(); 3619 err.print_raw_cr(title); 3620 for (i = 0; i < 78; i++) err.print_raw("-"); 3621 err.cr(); 3622 err.print_raw_cr(message); 3623 for (i = 0; i < 78; i++) err.print_raw("="); 3624 err.cr(); 3625 3626 char buf[16]; 3627 // Prevent process from exiting upon "read error" without consuming all CPU 3628 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3629 3630 return buf[0] == 'y' || buf[0] == 'Y'; 3631} 3632 3633static int sr_notify(OSThread* osthread) { 3634 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync()); 3635 assert_status(status == 0, status, "thr_kill"); 3636 return status; 3637} 3638 3639// "Randomly" selected value for how long we want to spin 3640// before bailing out on suspending a thread, also how often 3641// we send a signal to a thread we want to resume 3642static const int RANDOMLY_LARGE_INTEGER = 1000000; 3643static const int RANDOMLY_LARGE_INTEGER2 = 100; 3644 3645static bool do_suspend(OSThread* osthread) { 3646 assert(osthread->sr.is_running(), "thread should be running"); 3647 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 3648 3649 // mark as suspended and send signal 3650 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 3651 // failed to switch, state wasn't running? 3652 ShouldNotReachHere(); 3653 return false; 3654 } 3655 3656 if (sr_notify(osthread) != 0) { 3657 ShouldNotReachHere(); 3658 } 3659 3660 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 3661 while (true) { 3662 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) { 3663 break; 3664 } else { 3665 // timeout 3666 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 3667 if (cancelled == os::SuspendResume::SR_RUNNING) { 3668 return false; 3669 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 3670 // make sure that we consume the signal on the semaphore as well 3671 sr_semaphore.wait(); 3672 break; 3673 } else { 3674 ShouldNotReachHere(); 3675 return false; 3676 } 3677 } 3678 } 3679 3680 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 3681 return true; 3682} 3683 3684static void do_resume(OSThread* osthread) { 3685 assert(osthread->sr.is_suspended(), "thread should be suspended"); 3686 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 3687 3688 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 3689 // failed to switch to WAKEUP_REQUEST 3690 ShouldNotReachHere(); 3691 return; 3692 } 3693 3694 while (true) { 3695 if (sr_notify(osthread) == 0) { 3696 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { 3697 if (osthread->sr.is_running()) { 3698 return; 3699 } 3700 } 3701 } else { 3702 ShouldNotReachHere(); 3703 } 3704 } 3705 3706 guarantee(osthread->sr.is_running(), "Must be running!"); 3707} 3708 3709void os::SuspendedThreadTask::internal_do_task() { 3710 if (do_suspend(_thread->osthread())) { 3711 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 3712 do_task(context); 3713 do_resume(_thread->osthread()); 3714 } 3715} 3716 3717class PcFetcher : public os::SuspendedThreadTask { 3718 public: 3719 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} 3720 ExtendedPC result(); 3721 protected: 3722 void do_task(const os::SuspendedThreadTaskContext& context); 3723 private: 3724 ExtendedPC _epc; 3725}; 3726 3727ExtendedPC PcFetcher::result() { 3728 guarantee(is_done(), "task is not done yet."); 3729 return _epc; 3730} 3731 3732void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { 3733 Thread* thread = context.thread(); 3734 OSThread* osthread = thread->osthread(); 3735 if (osthread->ucontext() != NULL) { 3736 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext()); 3737 } else { 3738 // NULL context is unexpected, double-check this is the VMThread 3739 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); 3740 } 3741} 3742 3743// A lightweight implementation that does not suspend the target thread and 3744// thus returns only a hint. Used for profiling only! 3745ExtendedPC os::get_thread_pc(Thread* thread) { 3746 // Make sure that it is called by the watcher and the Threads lock is owned. 3747 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3748 // For now, is only used to profile the VM Thread 3749 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3750 PcFetcher fetcher(thread); 3751 fetcher.run(); 3752 return fetcher.result(); 3753} 3754 3755 3756// This does not do anything on Solaris. This is basically a hook for being 3757// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3758void os::os_exception_wrapper(java_call_t f, JavaValue* value, 3759 const methodHandle& method, JavaCallArguments* args, 3760 Thread* thread) { 3761 f(value, method, args, thread); 3762} 3763 3764// This routine may be used by user applications as a "hook" to catch signals. 3765// The user-defined signal handler must pass unrecognized signals to this 3766// routine, and if it returns true (non-zero), then the signal handler must 3767// return immediately. If the flag "abort_if_unrecognized" is true, then this 3768// routine will never retun false (zero), but instead will execute a VM panic 3769// routine kill the process. 3770// 3771// If this routine returns false, it is OK to call it again. This allows 3772// the user-defined signal handler to perform checks either before or after 3773// the VM performs its own checks. Naturally, the user code would be making 3774// a serious error if it tried to handle an exception (such as a null check 3775// or breakpoint) that the VM was generating for its own correct operation. 3776// 3777// This routine may recognize any of the following kinds of signals: 3778// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3779// os::Solaris::SIGasync 3780// It should be consulted by handlers for any of those signals. 3781// 3782// The caller of this routine must pass in the three arguments supplied 3783// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3784// field of the structure passed to sigaction(). This routine assumes that 3785// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3786// 3787// Note that the VM will print warnings if it detects conflicting signal 3788// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3789// 3790extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo, 3791 siginfo_t* siginfo, 3792 void* ucontext, 3793 int abort_if_unrecognized); 3794 3795 3796void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3797 int orig_errno = errno; // Preserve errno value over signal handler. 3798 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3799 errno = orig_errno; 3800} 3801 3802// This boolean allows users to forward their own non-matching signals 3803// to JVM_handle_solaris_signal, harmlessly. 3804bool os::Solaris::signal_handlers_are_installed = false; 3805 3806// For signal-chaining 3807bool os::Solaris::libjsig_is_loaded = false; 3808typedef struct sigaction *(*get_signal_t)(int); 3809get_signal_t os::Solaris::get_signal_action = NULL; 3810 3811struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3812 struct sigaction *actp = NULL; 3813 3814 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 3815 // Retrieve the old signal handler from libjsig 3816 actp = (*get_signal_action)(sig); 3817 } 3818 if (actp == NULL) { 3819 // Retrieve the preinstalled signal handler from jvm 3820 actp = get_preinstalled_handler(sig); 3821 } 3822 3823 return actp; 3824} 3825 3826static bool call_chained_handler(struct sigaction *actp, int sig, 3827 siginfo_t *siginfo, void *context) { 3828 // Call the old signal handler 3829 if (actp->sa_handler == SIG_DFL) { 3830 // It's more reasonable to let jvm treat it as an unexpected exception 3831 // instead of taking the default action. 3832 return false; 3833 } else if (actp->sa_handler != SIG_IGN) { 3834 if ((actp->sa_flags & SA_NODEFER) == 0) { 3835 // automaticlly block the signal 3836 sigaddset(&(actp->sa_mask), sig); 3837 } 3838 3839 sa_handler_t hand; 3840 sa_sigaction_t sa; 3841 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 3842 // retrieve the chained handler 3843 if (siginfo_flag_set) { 3844 sa = actp->sa_sigaction; 3845 } else { 3846 hand = actp->sa_handler; 3847 } 3848 3849 if ((actp->sa_flags & SA_RESETHAND) != 0) { 3850 actp->sa_handler = SIG_DFL; 3851 } 3852 3853 // try to honor the signal mask 3854 sigset_t oset; 3855 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 3856 3857 // call into the chained handler 3858 if (siginfo_flag_set) { 3859 (*sa)(sig, siginfo, context); 3860 } else { 3861 (*hand)(sig); 3862 } 3863 3864 // restore the signal mask 3865 thr_sigsetmask(SIG_SETMASK, &oset, 0); 3866 } 3867 // Tell jvm's signal handler the signal is taken care of. 3868 return true; 3869} 3870 3871bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 3872 bool chained = false; 3873 // signal-chaining 3874 if (UseSignalChaining) { 3875 struct sigaction *actp = get_chained_signal_action(sig); 3876 if (actp != NULL) { 3877 chained = call_chained_handler(actp, sig, siginfo, context); 3878 } 3879 } 3880 return chained; 3881} 3882 3883struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 3884 assert((chainedsigactions != (struct sigaction *)NULL) && 3885 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3886 if (preinstalled_sigs[sig] != 0) { 3887 return &chainedsigactions[sig]; 3888 } 3889 return NULL; 3890} 3891 3892void os::Solaris::save_preinstalled_handler(int sig, 3893 struct sigaction& oldAct) { 3894 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 3895 assert((chainedsigactions != (struct sigaction *)NULL) && 3896 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3897 chainedsigactions[sig] = oldAct; 3898 preinstalled_sigs[sig] = 1; 3899} 3900 3901void os::Solaris::set_signal_handler(int sig, bool set_installed, 3902 bool oktochain) { 3903 // Check for overwrite. 3904 struct sigaction oldAct; 3905 sigaction(sig, (struct sigaction*)NULL, &oldAct); 3906 void* oldhand = 3907 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3908 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3909 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 3910 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 3911 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 3912 if (AllowUserSignalHandlers || !set_installed) { 3913 // Do not overwrite; user takes responsibility to forward to us. 3914 return; 3915 } else if (UseSignalChaining) { 3916 if (oktochain) { 3917 // save the old handler in jvm 3918 save_preinstalled_handler(sig, oldAct); 3919 } else { 3920 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal."); 3921 } 3922 // libjsig also interposes the sigaction() call below and saves the 3923 // old sigaction on it own. 3924 } else { 3925 fatal("Encountered unexpected pre-existing sigaction handler " 3926 "%#lx for signal %d.", (long)oldhand, sig); 3927 } 3928 } 3929 3930 struct sigaction sigAct; 3931 sigfillset(&(sigAct.sa_mask)); 3932 sigAct.sa_handler = SIG_DFL; 3933 3934 sigAct.sa_sigaction = signalHandler; 3935 // Handle SIGSEGV on alternate signal stack if 3936 // not using stack banging 3937 if (!UseStackBanging && sig == SIGSEGV) { 3938 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 3939 } else { 3940 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 3941 } 3942 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 3943 3944 sigaction(sig, &sigAct, &oldAct); 3945 3946 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3947 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3948 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 3949} 3950 3951 3952#define DO_SIGNAL_CHECK(sig) \ 3953 do { \ 3954 if (!sigismember(&check_signal_done, sig)) { \ 3955 os::Solaris::check_signal_handler(sig); \ 3956 } \ 3957 } while (0) 3958 3959// This method is a periodic task to check for misbehaving JNI applications 3960// under CheckJNI, we can add any periodic checks here 3961 3962void os::run_periodic_checks() { 3963 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 3964 // thereby preventing a NULL checks. 3965 if (!check_addr0_done) check_addr0_done = check_addr0(tty); 3966 3967 if (check_signals == false) return; 3968 3969 // SEGV and BUS if overridden could potentially prevent 3970 // generation of hs*.log in the event of a crash, debugging 3971 // such a case can be very challenging, so we absolutely 3972 // check for the following for a good measure: 3973 DO_SIGNAL_CHECK(SIGSEGV); 3974 DO_SIGNAL_CHECK(SIGILL); 3975 DO_SIGNAL_CHECK(SIGFPE); 3976 DO_SIGNAL_CHECK(SIGBUS); 3977 DO_SIGNAL_CHECK(SIGPIPE); 3978 DO_SIGNAL_CHECK(SIGXFSZ); 3979 3980 // ReduceSignalUsage allows the user to override these handlers 3981 // see comments at the very top and jvm_solaris.h 3982 if (!ReduceSignalUsage) { 3983 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 3984 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 3985 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 3986 DO_SIGNAL_CHECK(BREAK_SIGNAL); 3987 } 3988 3989 // See comments above for using JVM1/JVM2 3990 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 3991 3992} 3993 3994typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 3995 3996static os_sigaction_t os_sigaction = NULL; 3997 3998void os::Solaris::check_signal_handler(int sig) { 3999 char buf[O_BUFLEN]; 4000 address jvmHandler = NULL; 4001 4002 struct sigaction act; 4003 if (os_sigaction == NULL) { 4004 // only trust the default sigaction, in case it has been interposed 4005 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4006 if (os_sigaction == NULL) return; 4007 } 4008 4009 os_sigaction(sig, (struct sigaction*)NULL, &act); 4010 4011 address thisHandler = (act.sa_flags & SA_SIGINFO) 4012 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4013 : CAST_FROM_FN_PTR(address, act.sa_handler); 4014 4015 4016 switch (sig) { 4017 case SIGSEGV: 4018 case SIGBUS: 4019 case SIGFPE: 4020 case SIGPIPE: 4021 case SIGXFSZ: 4022 case SIGILL: 4023 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4024 break; 4025 4026 case SHUTDOWN1_SIGNAL: 4027 case SHUTDOWN2_SIGNAL: 4028 case SHUTDOWN3_SIGNAL: 4029 case BREAK_SIGNAL: 4030 jvmHandler = (address)user_handler(); 4031 break; 4032 4033 default: 4034 int asynsig = os::Solaris::SIGasync(); 4035 4036 if (sig == asynsig) { 4037 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4038 } else { 4039 return; 4040 } 4041 break; 4042 } 4043 4044 4045 if (thisHandler != jvmHandler) { 4046 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4047 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4048 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4049 // No need to check this sig any longer 4050 sigaddset(&check_signal_done, sig); 4051 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN 4052 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { 4053 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", 4054 exception_name(sig, buf, O_BUFLEN)); 4055 } 4056 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4057 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4058 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4059 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4060 // No need to check this sig any longer 4061 sigaddset(&check_signal_done, sig); 4062 } 4063 4064 // Print all the signal handler state 4065 if (sigismember(&check_signal_done, sig)) { 4066 print_signal_handlers(tty, buf, O_BUFLEN); 4067 } 4068 4069} 4070 4071void os::Solaris::install_signal_handlers() { 4072 bool libjsigdone = false; 4073 signal_handlers_are_installed = true; 4074 4075 // signal-chaining 4076 typedef void (*signal_setting_t)(); 4077 signal_setting_t begin_signal_setting = NULL; 4078 signal_setting_t end_signal_setting = NULL; 4079 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4080 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4081 if (begin_signal_setting != NULL) { 4082 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4083 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4084 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4085 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4086 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4087 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4088 libjsig_is_loaded = true; 4089 if (os::Solaris::get_libjsig_version != NULL) { 4090 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4091 } 4092 assert(UseSignalChaining, "should enable signal-chaining"); 4093 } 4094 if (libjsig_is_loaded) { 4095 // Tell libjsig jvm is setting signal handlers 4096 (*begin_signal_setting)(); 4097 } 4098 4099 set_signal_handler(SIGSEGV, true, true); 4100 set_signal_handler(SIGPIPE, true, true); 4101 set_signal_handler(SIGXFSZ, true, true); 4102 set_signal_handler(SIGBUS, true, true); 4103 set_signal_handler(SIGILL, true, true); 4104 set_signal_handler(SIGFPE, true, true); 4105 4106 4107 if (os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4108 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4109 // can not register overridable signals which might be > 32 4110 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4111 // Tell libjsig jvm has finished setting signal handlers 4112 (*end_signal_setting)(); 4113 libjsigdone = true; 4114 } 4115 } 4116 4117 set_signal_handler(os::Solaris::SIGasync(), true, true); 4118 4119 if (libjsig_is_loaded && !libjsigdone) { 4120 // Tell libjsig jvm finishes setting signal handlers 4121 (*end_signal_setting)(); 4122 } 4123 4124 // We don't activate signal checker if libjsig is in place, we trust ourselves 4125 // and if UserSignalHandler is installed all bets are off. 4126 // Log that signal checking is off only if -verbose:jni is specified. 4127 if (CheckJNICalls) { 4128 if (libjsig_is_loaded) { 4129 if (PrintJNIResolving) { 4130 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4131 } 4132 check_signals = false; 4133 } 4134 if (AllowUserSignalHandlers) { 4135 if (PrintJNIResolving) { 4136 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4137 } 4138 check_signals = false; 4139 } 4140 } 4141} 4142 4143 4144void report_error(const char* file_name, int line_no, const char* title, 4145 const char* format, ...); 4146 4147// (Static) wrapper for getisax(2) call. 4148os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4149 4150// (Static) wrappers for the liblgrp API 4151os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4152os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4153os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4154os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4155os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4156os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4157os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4158os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4159os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4160 4161// (Static) wrapper for meminfo() call. 4162os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4163 4164static address resolve_symbol_lazy(const char* name) { 4165 address addr = (address) dlsym(RTLD_DEFAULT, name); 4166 if (addr == NULL) { 4167 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4168 addr = (address) dlsym(RTLD_NEXT, name); 4169 } 4170 return addr; 4171} 4172 4173static address resolve_symbol(const char* name) { 4174 address addr = resolve_symbol_lazy(name); 4175 if (addr == NULL) { 4176 fatal(dlerror()); 4177 } 4178 return addr; 4179} 4180 4181void os::Solaris::libthread_init() { 4182 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4183 4184 lwp_priocntl_init(); 4185 4186 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4187 if (func == NULL) { 4188 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4189 // Guarantee that this VM is running on an new enough OS (5.6 or 4190 // later) that it will have a new enough libthread.so. 4191 guarantee(func != NULL, "libthread.so is too old."); 4192 } 4193 4194 int size; 4195 void (*handler_info_func)(address *, int *); 4196 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4197 handler_info_func(&handler_start, &size); 4198 handler_end = handler_start + size; 4199} 4200 4201 4202int_fnP_mutex_tP os::Solaris::_mutex_lock; 4203int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4204int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4205int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4206int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4207int os::Solaris::_mutex_scope = USYNC_THREAD; 4208 4209int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4210int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4211int_fnP_cond_tP os::Solaris::_cond_signal; 4212int_fnP_cond_tP os::Solaris::_cond_broadcast; 4213int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4214int_fnP_cond_tP os::Solaris::_cond_destroy; 4215int os::Solaris::_cond_scope = USYNC_THREAD; 4216 4217void os::Solaris::synchronization_init() { 4218 if (UseLWPSynchronization) { 4219 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4220 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4221 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4222 os::Solaris::set_mutex_init(lwp_mutex_init); 4223 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4224 os::Solaris::set_mutex_scope(USYNC_THREAD); 4225 4226 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4227 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4228 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4229 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4230 os::Solaris::set_cond_init(lwp_cond_init); 4231 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4232 os::Solaris::set_cond_scope(USYNC_THREAD); 4233 } else { 4234 os::Solaris::set_mutex_scope(USYNC_THREAD); 4235 os::Solaris::set_cond_scope(USYNC_THREAD); 4236 4237 if (UsePthreads) { 4238 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4239 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4240 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4241 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4242 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4243 4244 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4245 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4246 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4247 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4248 os::Solaris::set_cond_init(pthread_cond_default_init); 4249 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4250 } else { 4251 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4252 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4253 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4254 os::Solaris::set_mutex_init(::mutex_init); 4255 os::Solaris::set_mutex_destroy(::mutex_destroy); 4256 4257 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4258 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4259 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4260 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4261 os::Solaris::set_cond_init(::cond_init); 4262 os::Solaris::set_cond_destroy(::cond_destroy); 4263 } 4264 } 4265} 4266 4267bool os::Solaris::liblgrp_init() { 4268 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4269 if (handle != NULL) { 4270 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4271 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4272 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4273 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4274 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4275 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4276 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4277 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4278 dlsym(handle, "lgrp_cookie_stale"))); 4279 4280 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4281 set_lgrp_cookie(c); 4282 return true; 4283 } 4284 return false; 4285} 4286 4287void os::Solaris::misc_sym_init() { 4288 address func; 4289 4290 // getisax 4291 func = resolve_symbol_lazy("getisax"); 4292 if (func != NULL) { 4293 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4294 } 4295 4296 // meminfo 4297 func = resolve_symbol_lazy("meminfo"); 4298 if (func != NULL) { 4299 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4300 } 4301} 4302 4303uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4304 assert(_getisax != NULL, "_getisax not set"); 4305 return _getisax(array, n); 4306} 4307 4308// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4309typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4310static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4311 4312void init_pset_getloadavg_ptr(void) { 4313 pset_getloadavg_ptr = 4314 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4315 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4316 warning("pset_getloadavg function not found"); 4317 } 4318} 4319 4320int os::Solaris::_dev_zero_fd = -1; 4321 4322// this is called _before_ the global arguments have been parsed 4323void os::init(void) { 4324 _initial_pid = getpid(); 4325 4326 max_hrtime = first_hrtime = gethrtime(); 4327 4328 init_random(1234567); 4329 4330 page_size = sysconf(_SC_PAGESIZE); 4331 if (page_size == -1) { 4332 fatal("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); 4333 } 4334 init_page_sizes((size_t) page_size); 4335 4336 Solaris::initialize_system_info(); 4337 4338 // Initialize misc. symbols as soon as possible, so we can use them 4339 // if we need them. 4340 Solaris::misc_sym_init(); 4341 4342 int fd = ::open("/dev/zero", O_RDWR); 4343 if (fd < 0) { 4344 fatal("os::init: cannot open /dev/zero (%s)", strerror(errno)); 4345 } else { 4346 Solaris::set_dev_zero_fd(fd); 4347 4348 // Close on exec, child won't inherit. 4349 fcntl(fd, F_SETFD, FD_CLOEXEC); 4350 } 4351 4352 clock_tics_per_sec = CLK_TCK; 4353 4354 // check if dladdr1() exists; dladdr1 can provide more information than 4355 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4356 // and is available on linker patches for 5.7 and 5.8. 4357 // libdl.so must have been loaded, this call is just an entry lookup 4358 void * hdl = dlopen("libdl.so", RTLD_NOW); 4359 if (hdl) { 4360 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4361 } 4362 4363 // (Solaris only) this switches to calls that actually do locking. 4364 ThreadCritical::initialize(); 4365 4366 main_thread = thr_self(); 4367 4368 // Constant minimum stack size allowed. It must be at least 4369 // the minimum of what the OS supports (thr_min_stack()), and 4370 // enough to allow the thread to get to user bytecode execution. 4371 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4372 // If the pagesize of the VM is greater than 8K determine the appropriate 4373 // number of initial guard pages. The user can change this with the 4374 // command line arguments, if needed. 4375 if (vm_page_size() > 8*K) { 4376 StackYellowPages = 1; 4377 StackRedPages = 1; 4378 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4379 } 4380} 4381 4382// To install functions for atexit system call 4383extern "C" { 4384 static void perfMemory_exit_helper() { 4385 perfMemory_exit(); 4386 } 4387} 4388 4389// this is called _after_ the global arguments have been parsed 4390jint os::init_2(void) { 4391 // try to enable extended file IO ASAP, see 6431278 4392 os::Solaris::try_enable_extended_io(); 4393 4394 // Allocate a single page and mark it as readable for safepoint polling. Also 4395 // use this first mmap call to check support for MAP_ALIGN. 4396 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4397 page_size, 4398 MAP_PRIVATE | MAP_ALIGN, 4399 PROT_READ); 4400 if (polling_page == NULL) { 4401 has_map_align = false; 4402 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4403 PROT_READ); 4404 } 4405 4406 os::set_polling_page(polling_page); 4407 4408#ifndef PRODUCT 4409 if (Verbose && PrintMiscellaneous) { 4410 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", 4411 (intptr_t)polling_page); 4412 } 4413#endif 4414 4415 if (!UseMembar) { 4416 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE); 4417 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4418 os::set_memory_serialize_page(mem_serialize_page); 4419 4420#ifndef PRODUCT 4421 if (Verbose && PrintMiscellaneous) { 4422 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", 4423 (intptr_t)mem_serialize_page); 4424 } 4425#endif 4426 } 4427 4428 // Check minimum allowable stack size for thread creation and to initialize 4429 // the java system classes, including StackOverflowError - depends on page 4430 // size. Add a page for compiler2 recursion in main thread. 4431 // Add in 2*BytesPerWord times page size to account for VM stack during 4432 // class initialization depending on 32 or 64 bit VM. 4433 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4434 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 4435 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 4436 4437 size_t threadStackSizeInBytes = ThreadStackSize * K; 4438 if (threadStackSizeInBytes != 0 && 4439 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 4440 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4441 os::Solaris::min_stack_allowed/K); 4442 return JNI_ERR; 4443 } 4444 4445 // For 64kbps there will be a 64kb page size, which makes 4446 // the usable default stack size quite a bit less. Increase the 4447 // stack for 64kb (or any > than 8kb) pages, this increases 4448 // virtual memory fragmentation (since we're not creating the 4449 // stack on a power of 2 boundary. The real fix for this 4450 // should be to fix the guard page mechanism. 4451 4452 if (vm_page_size() > 8*K) { 4453 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4454 ? threadStackSizeInBytes + 4455 ((StackYellowPages + StackRedPages) * vm_page_size()) 4456 : 0; 4457 ThreadStackSize = threadStackSizeInBytes/K; 4458 } 4459 4460 // Make the stack size a multiple of the page size so that 4461 // the yellow/red zones can be guarded. 4462 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4463 vm_page_size())); 4464 4465 Solaris::libthread_init(); 4466 4467 if (UseNUMA) { 4468 if (!Solaris::liblgrp_init()) { 4469 UseNUMA = false; 4470 } else { 4471 size_t lgrp_limit = os::numa_get_groups_num(); 4472 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 4473 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4474 FREE_C_HEAP_ARRAY(int, lgrp_ids); 4475 if (lgrp_num < 2) { 4476 // There's only one locality group, disable NUMA. 4477 UseNUMA = false; 4478 } 4479 } 4480 if (!UseNUMA && ForceNUMA) { 4481 UseNUMA = true; 4482 } 4483 } 4484 4485 Solaris::signal_sets_init(); 4486 Solaris::init_signal_mem(); 4487 Solaris::install_signal_handlers(); 4488 4489 if (libjsigversion < JSIG_VERSION_1_4_1) { 4490 Maxlibjsigsigs = OLDMAXSIGNUM; 4491 } 4492 4493 // initialize synchronization primitives to use either thread or 4494 // lwp synchronization (controlled by UseLWPSynchronization) 4495 Solaris::synchronization_init(); 4496 4497 if (MaxFDLimit) { 4498 // set the number of file descriptors to max. print out error 4499 // if getrlimit/setrlimit fails but continue regardless. 4500 struct rlimit nbr_files; 4501 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4502 if (status != 0) { 4503 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4504 perror("os::init_2 getrlimit failed"); 4505 } 4506 } else { 4507 nbr_files.rlim_cur = nbr_files.rlim_max; 4508 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4509 if (status != 0) { 4510 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4511 perror("os::init_2 setrlimit failed"); 4512 } 4513 } 4514 } 4515 } 4516 4517 // Calculate theoretical max. size of Threads to guard gainst 4518 // artifical out-of-memory situations, where all available address- 4519 // space has been reserved by thread stacks. Default stack size is 1Mb. 4520 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4521 JavaThread::stack_size_at_create() : (1*K*K); 4522 assert(pre_thread_stack_size != 0, "Must have a stack"); 4523 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4524 // we should start doing Virtual Memory banging. Currently when the threads will 4525 // have used all but 200Mb of space. 4526 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4527 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4528 4529 // at-exit methods are called in the reverse order of their registration. 4530 // In Solaris 7 and earlier, atexit functions are called on return from 4531 // main or as a result of a call to exit(3C). There can be only 32 of 4532 // these functions registered and atexit() does not set errno. In Solaris 4533 // 8 and later, there is no limit to the number of functions registered 4534 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4535 // functions are called upon dlclose(3DL) in addition to return from main 4536 // and exit(3C). 4537 4538 if (PerfAllowAtExitRegistration) { 4539 // only register atexit functions if PerfAllowAtExitRegistration is set. 4540 // atexit functions can be delayed until process exit time, which 4541 // can be problematic for embedded VM situations. Embedded VMs should 4542 // call DestroyJavaVM() to assure that VM resources are released. 4543 4544 // note: perfMemory_exit_helper atexit function may be removed in 4545 // the future if the appropriate cleanup code can be added to the 4546 // VM_Exit VMOperation's doit method. 4547 if (atexit(perfMemory_exit_helper) != 0) { 4548 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4549 } 4550 } 4551 4552 // Init pset_loadavg function pointer 4553 init_pset_getloadavg_ptr(); 4554 4555 return JNI_OK; 4556} 4557 4558// Mark the polling page as unreadable 4559void os::make_polling_page_unreadable(void) { 4560 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) { 4561 fatal("Could not disable polling page"); 4562 } 4563} 4564 4565// Mark the polling page as readable 4566void os::make_polling_page_readable(void) { 4567 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) { 4568 fatal("Could not enable polling page"); 4569 } 4570} 4571 4572// OS interface. 4573 4574bool os::check_heap(bool force) { return true; } 4575 4576// Is a (classpath) directory empty? 4577bool os::dir_is_empty(const char* path) { 4578 DIR *dir = NULL; 4579 struct dirent *ptr; 4580 4581 dir = opendir(path); 4582 if (dir == NULL) return true; 4583 4584 // Scan the directory 4585 bool result = true; 4586 char buf[sizeof(struct dirent) + MAX_PATH]; 4587 struct dirent *dbuf = (struct dirent *) buf; 4588 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4589 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4590 result = false; 4591 } 4592 } 4593 closedir(dir); 4594 return result; 4595} 4596 4597// This code originates from JDK's sysOpen and open64_w 4598// from src/solaris/hpi/src/system_md.c 4599 4600int os::open(const char *path, int oflag, int mode) { 4601 if (strlen(path) > MAX_PATH - 1) { 4602 errno = ENAMETOOLONG; 4603 return -1; 4604 } 4605 int fd; 4606 4607 fd = ::open64(path, oflag, mode); 4608 if (fd == -1) return -1; 4609 4610 // If the open succeeded, the file might still be a directory 4611 { 4612 struct stat64 buf64; 4613 int ret = ::fstat64(fd, &buf64); 4614 int st_mode = buf64.st_mode; 4615 4616 if (ret != -1) { 4617 if ((st_mode & S_IFMT) == S_IFDIR) { 4618 errno = EISDIR; 4619 ::close(fd); 4620 return -1; 4621 } 4622 } else { 4623 ::close(fd); 4624 return -1; 4625 } 4626 } 4627 4628 // 32-bit Solaris systems suffer from: 4629 // 4630 // - an historical default soft limit of 256 per-process file 4631 // descriptors that is too low for many Java programs. 4632 // 4633 // - a design flaw where file descriptors created using stdio 4634 // fopen must be less than 256, _even_ when the first limit above 4635 // has been raised. This can cause calls to fopen (but not calls to 4636 // open, for example) to fail mysteriously, perhaps in 3rd party 4637 // native code (although the JDK itself uses fopen). One can hardly 4638 // criticize them for using this most standard of all functions. 4639 // 4640 // We attempt to make everything work anyways by: 4641 // 4642 // - raising the soft limit on per-process file descriptors beyond 4643 // 256 4644 // 4645 // - As of Solaris 10u4, we can request that Solaris raise the 256 4646 // stdio fopen limit by calling function enable_extended_FILE_stdio. 4647 // This is done in init_2 and recorded in enabled_extended_FILE_stdio 4648 // 4649 // - If we are stuck on an old (pre 10u4) Solaris system, we can 4650 // workaround the bug by remapping non-stdio file descriptors below 4651 // 256 to ones beyond 256, which is done below. 4652 // 4653 // See: 4654 // 1085341: 32-bit stdio routines should support file descriptors >255 4655 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files 4656 // 6431278: Netbeans crash on 32 bit Solaris: need to call 4657 // enable_extended_FILE_stdio() in VM initialisation 4658 // Giri Mandalika's blog 4659 // http://technopark02.blogspot.com/2005_05_01_archive.html 4660 // 4661#ifndef _LP64 4662 if ((!enabled_extended_FILE_stdio) && fd < 256) { 4663 int newfd = ::fcntl(fd, F_DUPFD, 256); 4664 if (newfd != -1) { 4665 ::close(fd); 4666 fd = newfd; 4667 } 4668 } 4669#endif // 32-bit Solaris 4670 4671 // All file descriptors that are opened in the JVM and not 4672 // specifically destined for a subprocess should have the 4673 // close-on-exec flag set. If we don't set it, then careless 3rd 4674 // party native code might fork and exec without closing all 4675 // appropriate file descriptors (e.g. as we do in closeDescriptors in 4676 // UNIXProcess.c), and this in turn might: 4677 // 4678 // - cause end-of-file to fail to be detected on some file 4679 // descriptors, resulting in mysterious hangs, or 4680 // 4681 // - might cause an fopen in the subprocess to fail on a system 4682 // suffering from bug 1085341. 4683 // 4684 // (Yes, the default setting of the close-on-exec flag is a Unix 4685 // design flaw) 4686 // 4687 // See: 4688 // 1085341: 32-bit stdio routines should support file descriptors >255 4689 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed 4690 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 4691 // 4692#ifdef FD_CLOEXEC 4693 { 4694 int flags = ::fcntl(fd, F_GETFD); 4695 if (flags != -1) { 4696 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 4697 } 4698 } 4699#endif 4700 4701 return fd; 4702} 4703 4704// create binary file, rewriting existing file if required 4705int os::create_binary_file(const char* path, bool rewrite_existing) { 4706 int oflags = O_WRONLY | O_CREAT; 4707 if (!rewrite_existing) { 4708 oflags |= O_EXCL; 4709 } 4710 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4711} 4712 4713// return current position of file pointer 4714jlong os::current_file_offset(int fd) { 4715 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4716} 4717 4718// move file pointer to the specified offset 4719jlong os::seek_to_file_offset(int fd, jlong offset) { 4720 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4721} 4722 4723jlong os::lseek(int fd, jlong offset, int whence) { 4724 return (jlong) ::lseek64(fd, offset, whence); 4725} 4726 4727char * os::native_path(char *path) { 4728 return path; 4729} 4730 4731int os::ftruncate(int fd, jlong length) { 4732 return ::ftruncate64(fd, length); 4733} 4734 4735int os::fsync(int fd) { 4736 RESTARTABLE_RETURN_INT(::fsync(fd)); 4737} 4738 4739int os::available(int fd, jlong *bytes) { 4740 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 4741 "Assumed _thread_in_native"); 4742 jlong cur, end; 4743 int mode; 4744 struct stat64 buf64; 4745 4746 if (::fstat64(fd, &buf64) >= 0) { 4747 mode = buf64.st_mode; 4748 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 4749 int n,ioctl_return; 4750 4751 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return); 4752 if (ioctl_return>= 0) { 4753 *bytes = n; 4754 return 1; 4755 } 4756 } 4757 } 4758 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 4759 return 0; 4760 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 4761 return 0; 4762 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 4763 return 0; 4764 } 4765 *bytes = end - cur; 4766 return 1; 4767} 4768 4769// Map a block of memory. 4770char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4771 char *addr, size_t bytes, bool read_only, 4772 bool allow_exec) { 4773 int prot; 4774 int flags; 4775 4776 if (read_only) { 4777 prot = PROT_READ; 4778 flags = MAP_SHARED; 4779 } else { 4780 prot = PROT_READ | PROT_WRITE; 4781 flags = MAP_PRIVATE; 4782 } 4783 4784 if (allow_exec) { 4785 prot |= PROT_EXEC; 4786 } 4787 4788 if (addr != NULL) { 4789 flags |= MAP_FIXED; 4790 } 4791 4792 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4793 fd, file_offset); 4794 if (mapped_address == MAP_FAILED) { 4795 return NULL; 4796 } 4797 return mapped_address; 4798} 4799 4800 4801// Remap a block of memory. 4802char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 4803 char *addr, size_t bytes, bool read_only, 4804 bool allow_exec) { 4805 // same as map_memory() on this OS 4806 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4807 allow_exec); 4808} 4809 4810 4811// Unmap a block of memory. 4812bool os::pd_unmap_memory(char* addr, size_t bytes) { 4813 return munmap(addr, bytes) == 0; 4814} 4815 4816void os::pause() { 4817 char filename[MAX_PATH]; 4818 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4819 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4820 } else { 4821 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4822 } 4823 4824 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4825 if (fd != -1) { 4826 struct stat buf; 4827 ::close(fd); 4828 while (::stat(filename, &buf) == 0) { 4829 (void)::poll(NULL, 0, 100); 4830 } 4831 } else { 4832 jio_fprintf(stderr, 4833 "Could not open pause file '%s', continuing immediately.\n", filename); 4834 } 4835} 4836 4837#ifndef PRODUCT 4838#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4839// Turn this on if you need to trace synch operations. 4840// Set RECORD_SYNCH_LIMIT to a large-enough value, 4841// and call record_synch_enable and record_synch_disable 4842// around the computation of interest. 4843 4844void record_synch(char* name, bool returning); // defined below 4845 4846class RecordSynch { 4847 char* _name; 4848 public: 4849 RecordSynch(char* name) :_name(name) { record_synch(_name, false); } 4850 ~RecordSynch() { record_synch(_name, true); } 4851}; 4852 4853#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 4854extern "C" ret name params { \ 4855 typedef ret name##_t params; \ 4856 static name##_t* implem = NULL; \ 4857 static int callcount = 0; \ 4858 if (implem == NULL) { \ 4859 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 4860 if (implem == NULL) fatal(dlerror()); \ 4861 } \ 4862 ++callcount; \ 4863 RecordSynch _rs(#name); \ 4864 inner; \ 4865 return implem args; \ 4866} 4867// in dbx, examine callcounts this way: 4868// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 4869 4870#define CHECK_POINTER_OK(p) \ 4871 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 4872#define CHECK_MU \ 4873 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 4874#define CHECK_CV \ 4875 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 4876#define CHECK_P(p) \ 4877 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 4878 4879#define CHECK_MUTEX(mutex_op) \ 4880 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 4881 4882CHECK_MUTEX( mutex_lock) 4883CHECK_MUTEX( _mutex_lock) 4884CHECK_MUTEX( mutex_unlock) 4885CHECK_MUTEX(_mutex_unlock) 4886CHECK_MUTEX( mutex_trylock) 4887CHECK_MUTEX(_mutex_trylock) 4888 4889#define CHECK_COND(cond_op) \ 4890 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV); 4891 4892CHECK_COND( cond_wait); 4893CHECK_COND(_cond_wait); 4894CHECK_COND(_cond_wait_cancel); 4895 4896#define CHECK_COND2(cond_op) \ 4897 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV); 4898 4899CHECK_COND2( cond_timedwait); 4900CHECK_COND2(_cond_timedwait); 4901CHECK_COND2(_cond_timedwait_cancel); 4902 4903// do the _lwp_* versions too 4904#define mutex_t lwp_mutex_t 4905#define cond_t lwp_cond_t 4906CHECK_MUTEX( _lwp_mutex_lock) 4907CHECK_MUTEX( _lwp_mutex_unlock) 4908CHECK_MUTEX( _lwp_mutex_trylock) 4909CHECK_MUTEX( __lwp_mutex_lock) 4910CHECK_MUTEX( __lwp_mutex_unlock) 4911CHECK_MUTEX( __lwp_mutex_trylock) 4912CHECK_MUTEX(___lwp_mutex_lock) 4913CHECK_MUTEX(___lwp_mutex_unlock) 4914 4915CHECK_COND( _lwp_cond_wait); 4916CHECK_COND( __lwp_cond_wait); 4917CHECK_COND(___lwp_cond_wait); 4918 4919CHECK_COND2( _lwp_cond_timedwait); 4920CHECK_COND2( __lwp_cond_timedwait); 4921#undef mutex_t 4922#undef cond_t 4923 4924CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4925CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4926CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 4927CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 4928CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4929CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4930CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4931CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4932 4933 4934// recording machinery: 4935 4936enum { RECORD_SYNCH_LIMIT = 200 }; 4937char* record_synch_name[RECORD_SYNCH_LIMIT]; 4938void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 4939bool record_synch_returning[RECORD_SYNCH_LIMIT]; 4940thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 4941int record_synch_count = 0; 4942bool record_synch_enabled = false; 4943 4944// in dbx, examine recorded data this way: 4945// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 4946 4947void record_synch(char* name, bool returning) { 4948 if (record_synch_enabled) { 4949 if (record_synch_count < RECORD_SYNCH_LIMIT) { 4950 record_synch_name[record_synch_count] = name; 4951 record_synch_returning[record_synch_count] = returning; 4952 record_synch_thread[record_synch_count] = thr_self(); 4953 record_synch_arg0ptr[record_synch_count] = &name; 4954 record_synch_count++; 4955 } 4956 // put more checking code here: 4957 // ... 4958 } 4959} 4960 4961void record_synch_enable() { 4962 // start collecting trace data, if not already doing so 4963 if (!record_synch_enabled) record_synch_count = 0; 4964 record_synch_enabled = true; 4965} 4966 4967void record_synch_disable() { 4968 // stop collecting trace data 4969 record_synch_enabled = false; 4970} 4971 4972#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4973#endif // PRODUCT 4974 4975const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 4976const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 4977 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 4978 4979 4980// JVMTI & JVM monitoring and management support 4981// The thread_cpu_time() and current_thread_cpu_time() are only 4982// supported if is_thread_cpu_time_supported() returns true. 4983// They are not supported on Solaris T1. 4984 4985// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 4986// are used by JVM M&M and JVMTI to get user+sys or user CPU time 4987// of a thread. 4988// 4989// current_thread_cpu_time() and thread_cpu_time(Thread *) 4990// returns the fast estimate available on the platform. 4991 4992// hrtime_t gethrvtime() return value includes 4993// user time but does not include system time 4994jlong os::current_thread_cpu_time() { 4995 return (jlong) gethrvtime(); 4996} 4997 4998jlong os::thread_cpu_time(Thread *thread) { 4999 // return user level CPU time only to be consistent with 5000 // what current_thread_cpu_time returns. 5001 // thread_cpu_time_info() must be changed if this changes 5002 return os::thread_cpu_time(thread, false /* user time only */); 5003} 5004 5005jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5006 if (user_sys_cpu_time) { 5007 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5008 } else { 5009 return os::current_thread_cpu_time(); 5010 } 5011} 5012 5013jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5014 char proc_name[64]; 5015 int count; 5016 prusage_t prusage; 5017 jlong lwp_time; 5018 int fd; 5019 5020 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5021 getpid(), 5022 thread->osthread()->lwp_id()); 5023 fd = ::open(proc_name, O_RDONLY); 5024 if (fd == -1) return -1; 5025 5026 do { 5027 count = ::pread(fd, 5028 (void *)&prusage.pr_utime, 5029 thr_time_size, 5030 thr_time_off); 5031 } while (count < 0 && errno == EINTR); 5032 ::close(fd); 5033 if (count < 0) return -1; 5034 5035 if (user_sys_cpu_time) { 5036 // user + system CPU time 5037 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5038 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5039 (jlong)prusage.pr_stime.tv_nsec + 5040 (jlong)prusage.pr_utime.tv_nsec; 5041 } else { 5042 // user level CPU time only 5043 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5044 (jlong)prusage.pr_utime.tv_nsec; 5045 } 5046 5047 return (lwp_time); 5048} 5049 5050void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5051 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5052 info_ptr->may_skip_backward = false; // elapsed time not wall time 5053 info_ptr->may_skip_forward = false; // elapsed time not wall time 5054 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5055} 5056 5057void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5058 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5059 info_ptr->may_skip_backward = false; // elapsed time not wall time 5060 info_ptr->may_skip_forward = false; // elapsed time not wall time 5061 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5062} 5063 5064bool os::is_thread_cpu_time_supported() { 5065 return true; 5066} 5067 5068// System loadavg support. Returns -1 if load average cannot be obtained. 5069// Return the load average for our processor set if the primitive exists 5070// (Solaris 9 and later). Otherwise just return system wide loadavg. 5071int os::loadavg(double loadavg[], int nelem) { 5072 if (pset_getloadavg_ptr != NULL) { 5073 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5074 } else { 5075 return ::getloadavg(loadavg, nelem); 5076 } 5077} 5078 5079//--------------------------------------------------------------------------------- 5080 5081bool os::find(address addr, outputStream* st) { 5082 Dl_info dlinfo; 5083 memset(&dlinfo, 0, sizeof(dlinfo)); 5084 if (dladdr(addr, &dlinfo) != 0) { 5085 st->print(PTR_FORMAT ": ", addr); 5086 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 5087 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5088 } else if (dlinfo.dli_fbase != NULL) { 5089 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5090 } else { 5091 st->print("<absolute address>"); 5092 } 5093 if (dlinfo.dli_fname != NULL) { 5094 st->print(" in %s", dlinfo.dli_fname); 5095 } 5096 if (dlinfo.dli_fbase != NULL) { 5097 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 5098 } 5099 st->cr(); 5100 5101 if (Verbose) { 5102 // decode some bytes around the PC 5103 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 5104 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 5105 address lowest = (address) dlinfo.dli_sname; 5106 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5107 if (begin < lowest) begin = lowest; 5108 Dl_info dlinfo2; 5109 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 5110 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) { 5111 end = (address) dlinfo2.dli_saddr; 5112 } 5113 Disassembler::decode(begin, end, st); 5114 } 5115 return true; 5116 } 5117 return false; 5118} 5119 5120// Following function has been added to support HotSparc's libjvm.so running 5121// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5122// src/solaris/hpi/native_threads in the EVM codebase. 5123// 5124// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5125// libraries and should thus be removed. We will leave it behind for a while 5126// until we no longer want to able to run on top of 1.3.0 Solaris production 5127// JDK. See 4341971. 5128 5129#define STACK_SLACK 0x800 5130 5131extern "C" { 5132 intptr_t sysThreadAvailableStackWithSlack() { 5133 stack_t st; 5134 intptr_t retval, stack_top; 5135 retval = thr_stksegment(&st); 5136 assert(retval == 0, "incorrect return value from thr_stksegment"); 5137 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5138 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5139 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5140 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5141 } 5142} 5143 5144// ObjectMonitor park-unpark infrastructure ... 5145// 5146// We implement Solaris and Linux PlatformEvents with the 5147// obvious condvar-mutex-flag triple. 5148// Another alternative that works quite well is pipes: 5149// Each PlatformEvent consists of a pipe-pair. 5150// The thread associated with the PlatformEvent 5151// calls park(), which reads from the input end of the pipe. 5152// Unpark() writes into the other end of the pipe. 5153// The write-side of the pipe must be set NDELAY. 5154// Unfortunately pipes consume a large # of handles. 5155// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5156// Using pipes for the 1st few threads might be workable, however. 5157// 5158// park() is permitted to return spuriously. 5159// Callers of park() should wrap the call to park() in 5160// an appropriate loop. A litmus test for the correct 5161// usage of park is the following: if park() were modified 5162// to immediately return 0 your code should still work, 5163// albeit degenerating to a spin loop. 5164// 5165// In a sense, park()-unpark() just provides more polite spinning 5166// and polling with the key difference over naive spinning being 5167// that a parked thread needs to be explicitly unparked() in order 5168// to wake up and to poll the underlying condition. 5169// 5170// Assumption: 5171// Only one parker can exist on an event, which is why we allocate 5172// them per-thread. Multiple unparkers can coexist. 5173// 5174// _Event transitions in park() 5175// -1 => -1 : illegal 5176// 1 => 0 : pass - return immediately 5177// 0 => -1 : block; then set _Event to 0 before returning 5178// 5179// _Event transitions in unpark() 5180// 0 => 1 : just return 5181// 1 => 1 : just return 5182// -1 => either 0 or 1; must signal target thread 5183// That is, we can safely transition _Event from -1 to either 5184// 0 or 1. 5185// 5186// _Event serves as a restricted-range semaphore. 5187// -1 : thread is blocked, i.e. there is a waiter 5188// 0 : neutral: thread is running or ready, 5189// could have been signaled after a wait started 5190// 1 : signaled - thread is running or ready 5191// 5192// Another possible encoding of _Event would be with 5193// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5194// 5195// TODO-FIXME: add DTRACE probes for: 5196// 1. Tx parks 5197// 2. Ty unparks Tx 5198// 3. Tx resumes from park 5199 5200 5201// value determined through experimentation 5202#define ROUNDINGFIX 11 5203 5204// utility to compute the abstime argument to timedwait. 5205// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5206 5207static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5208 // millis is the relative timeout time 5209 // abstime will be the absolute timeout time 5210 if (millis < 0) millis = 0; 5211 struct timeval now; 5212 int status = gettimeofday(&now, NULL); 5213 assert(status == 0, "gettimeofday"); 5214 jlong seconds = millis / 1000; 5215 jlong max_wait_period; 5216 5217 if (UseLWPSynchronization) { 5218 // forward port of fix for 4275818 (not sleeping long enough) 5219 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5220 // _lwp_cond_timedwait() used a round_down algorithm rather 5221 // than a round_up. For millis less than our roundfactor 5222 // it rounded down to 0 which doesn't meet the spec. 5223 // For millis > roundfactor we may return a bit sooner, but 5224 // since we can not accurately identify the patch level and 5225 // this has already been fixed in Solaris 9 and 8 we will 5226 // leave it alone rather than always rounding down. 5227 5228 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5229 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5230 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5231 max_wait_period = 21000000; 5232 } else { 5233 max_wait_period = 50000000; 5234 } 5235 millis %= 1000; 5236 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5237 seconds = max_wait_period; 5238 } 5239 abstime->tv_sec = now.tv_sec + seconds; 5240 long usec = now.tv_usec + millis * 1000; 5241 if (usec >= 1000000) { 5242 abstime->tv_sec += 1; 5243 usec -= 1000000; 5244 } 5245 abstime->tv_nsec = usec * 1000; 5246 return abstime; 5247} 5248 5249void os::PlatformEvent::park() { // AKA: down() 5250 // Transitions for _Event: 5251 // -1 => -1 : illegal 5252 // 1 => 0 : pass - return immediately 5253 // 0 => -1 : block; then set _Event to 0 before returning 5254 5255 // Invariant: Only the thread associated with the Event/PlatformEvent 5256 // may call park(). 5257 assert(_nParked == 0, "invariant"); 5258 5259 int v; 5260 for (;;) { 5261 v = _Event; 5262 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5263 } 5264 guarantee(v >= 0, "invariant"); 5265 if (v == 0) { 5266 // Do this the hard way by blocking ... 5267 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5268 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5269 // Only for SPARC >= V8PlusA 5270#if defined(__sparc) && defined(COMPILER2) 5271 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5272#endif 5273 int status = os::Solaris::mutex_lock(_mutex); 5274 assert_status(status == 0, status, "mutex_lock"); 5275 guarantee(_nParked == 0, "invariant"); 5276 ++_nParked; 5277 while (_Event < 0) { 5278 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5279 // Treat this the same as if the wait was interrupted 5280 // With usr/lib/lwp going to kernel, always handle ETIME 5281 status = os::Solaris::cond_wait(_cond, _mutex); 5282 if (status == ETIME) status = EINTR; 5283 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5284 } 5285 --_nParked; 5286 _Event = 0; 5287 status = os::Solaris::mutex_unlock(_mutex); 5288 assert_status(status == 0, status, "mutex_unlock"); 5289 // Paranoia to ensure our locked and lock-free paths interact 5290 // correctly with each other. 5291 OrderAccess::fence(); 5292 } 5293} 5294 5295int os::PlatformEvent::park(jlong millis) { 5296 // Transitions for _Event: 5297 // -1 => -1 : illegal 5298 // 1 => 0 : pass - return immediately 5299 // 0 => -1 : block; then set _Event to 0 before returning 5300 5301 guarantee(_nParked == 0, "invariant"); 5302 int v; 5303 for (;;) { 5304 v = _Event; 5305 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5306 } 5307 guarantee(v >= 0, "invariant"); 5308 if (v != 0) return OS_OK; 5309 5310 int ret = OS_TIMEOUT; 5311 timestruc_t abst; 5312 compute_abstime(&abst, millis); 5313 5314 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5315 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5316 // Only for SPARC >= V8PlusA 5317#if defined(__sparc) && defined(COMPILER2) 5318 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5319#endif 5320 int status = os::Solaris::mutex_lock(_mutex); 5321 assert_status(status == 0, status, "mutex_lock"); 5322 guarantee(_nParked == 0, "invariant"); 5323 ++_nParked; 5324 while (_Event < 0) { 5325 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5326 assert_status(status == 0 || status == EINTR || 5327 status == ETIME || status == ETIMEDOUT, 5328 status, "cond_timedwait"); 5329 if (!FilterSpuriousWakeups) break; // previous semantics 5330 if (status == ETIME || status == ETIMEDOUT) break; 5331 // We consume and ignore EINTR and spurious wakeups. 5332 } 5333 --_nParked; 5334 if (_Event >= 0) ret = OS_OK; 5335 _Event = 0; 5336 status = os::Solaris::mutex_unlock(_mutex); 5337 assert_status(status == 0, status, "mutex_unlock"); 5338 // Paranoia to ensure our locked and lock-free paths interact 5339 // correctly with each other. 5340 OrderAccess::fence(); 5341 return ret; 5342} 5343 5344void os::PlatformEvent::unpark() { 5345 // Transitions for _Event: 5346 // 0 => 1 : just return 5347 // 1 => 1 : just return 5348 // -1 => either 0 or 1; must signal target thread 5349 // That is, we can safely transition _Event from -1 to either 5350 // 0 or 1. 5351 // See also: "Semaphores in Plan 9" by Mullender & Cox 5352 // 5353 // Note: Forcing a transition from "-1" to "1" on an unpark() means 5354 // that it will take two back-to-back park() calls for the owning 5355 // thread to block. This has the benefit of forcing a spurious return 5356 // from the first park() call after an unpark() call which will help 5357 // shake out uses of park() and unpark() without condition variables. 5358 5359 if (Atomic::xchg(1, &_Event) >= 0) return; 5360 5361 // If the thread associated with the event was parked, wake it. 5362 // Wait for the thread assoc with the PlatformEvent to vacate. 5363 int status = os::Solaris::mutex_lock(_mutex); 5364 assert_status(status == 0, status, "mutex_lock"); 5365 int AnyWaiters = _nParked; 5366 status = os::Solaris::mutex_unlock(_mutex); 5367 assert_status(status == 0, status, "mutex_unlock"); 5368 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 5369 if (AnyWaiters != 0) { 5370 // Note that we signal() *after* dropping the lock for "immortal" Events. 5371 // This is safe and avoids a common class of futile wakeups. In rare 5372 // circumstances this can cause a thread to return prematurely from 5373 // cond_{timed}wait() but the spurious wakeup is benign and the victim 5374 // will simply re-test the condition and re-park itself. 5375 // This provides particular benefit if the underlying platform does not 5376 // provide wait morphing. 5377 status = os::Solaris::cond_signal(_cond); 5378 assert_status(status == 0, status, "cond_signal"); 5379 } 5380} 5381 5382// JSR166 5383// ------------------------------------------------------- 5384 5385// The solaris and linux implementations of park/unpark are fairly 5386// conservative for now, but can be improved. They currently use a 5387// mutex/condvar pair, plus _counter. 5388// Park decrements _counter if > 0, else does a condvar wait. Unpark 5389// sets count to 1 and signals condvar. Only one thread ever waits 5390// on the condvar. Contention seen when trying to park implies that someone 5391// is unparking you, so don't wait. And spurious returns are fine, so there 5392// is no need to track notifications. 5393 5394#define MAX_SECS 100000000 5395 5396// This code is common to linux and solaris and will be moved to a 5397// common place in dolphin. 5398// 5399// The passed in time value is either a relative time in nanoseconds 5400// or an absolute time in milliseconds. Either way it has to be unpacked 5401// into suitable seconds and nanoseconds components and stored in the 5402// given timespec structure. 5403// Given time is a 64-bit value and the time_t used in the timespec is only 5404// a signed-32-bit value (except on 64-bit Linux) we have to watch for 5405// overflow if times way in the future are given. Further on Solaris versions 5406// prior to 10 there is a restriction (see cond_timedwait) that the specified 5407// number of seconds, in abstime, is less than current_time + 100,000,000. 5408// As it will be 28 years before "now + 100000000" will overflow we can 5409// ignore overflow and just impose a hard-limit on seconds using the value 5410// of "now + 100,000,000". This places a limit on the timeout of about 3.17 5411// years from "now". 5412// 5413static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5414 assert(time > 0, "convertTime"); 5415 5416 struct timeval now; 5417 int status = gettimeofday(&now, NULL); 5418 assert(status == 0, "gettimeofday"); 5419 5420 time_t max_secs = now.tv_sec + MAX_SECS; 5421 5422 if (isAbsolute) { 5423 jlong secs = time / 1000; 5424 if (secs > max_secs) { 5425 absTime->tv_sec = max_secs; 5426 } else { 5427 absTime->tv_sec = secs; 5428 } 5429 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5430 } else { 5431 jlong secs = time / NANOSECS_PER_SEC; 5432 if (secs >= MAX_SECS) { 5433 absTime->tv_sec = max_secs; 5434 absTime->tv_nsec = 0; 5435 } else { 5436 absTime->tv_sec = now.tv_sec + secs; 5437 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5438 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5439 absTime->tv_nsec -= NANOSECS_PER_SEC; 5440 ++absTime->tv_sec; // note: this must be <= max_secs 5441 } 5442 } 5443 } 5444 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5445 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5446 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5447 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5448} 5449 5450void Parker::park(bool isAbsolute, jlong time) { 5451 // Ideally we'd do something useful while spinning, such 5452 // as calling unpackTime(). 5453 5454 // Optional fast-path check: 5455 // Return immediately if a permit is available. 5456 // We depend on Atomic::xchg() having full barrier semantics 5457 // since we are doing a lock-free update to _counter. 5458 if (Atomic::xchg(0, &_counter) > 0) return; 5459 5460 // Optional fast-exit: Check interrupt before trying to wait 5461 Thread* thread = Thread::current(); 5462 assert(thread->is_Java_thread(), "Must be JavaThread"); 5463 JavaThread *jt = (JavaThread *)thread; 5464 if (Thread::is_interrupted(thread, false)) { 5465 return; 5466 } 5467 5468 // First, demultiplex/decode time arguments 5469 timespec absTime; 5470 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all 5471 return; 5472 } 5473 if (time > 0) { 5474 // Warning: this code might be exposed to the old Solaris time 5475 // round-down bugs. Grep "roundingFix" for details. 5476 unpackTime(&absTime, isAbsolute, time); 5477 } 5478 5479 // Enter safepoint region 5480 // Beware of deadlocks such as 6317397. 5481 // The per-thread Parker:: _mutex is a classic leaf-lock. 5482 // In particular a thread must never block on the Threads_lock while 5483 // holding the Parker:: mutex. If safepoints are pending both the 5484 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5485 ThreadBlockInVM tbivm(jt); 5486 5487 // Don't wait if cannot get lock since interference arises from 5488 // unblocking. Also. check interrupt before trying wait 5489 if (Thread::is_interrupted(thread, false) || 5490 os::Solaris::mutex_trylock(_mutex) != 0) { 5491 return; 5492 } 5493 5494 int status; 5495 5496 if (_counter > 0) { // no wait needed 5497 _counter = 0; 5498 status = os::Solaris::mutex_unlock(_mutex); 5499 assert(status == 0, "invariant"); 5500 // Paranoia to ensure our locked and lock-free paths interact 5501 // correctly with each other and Java-level accesses. 5502 OrderAccess::fence(); 5503 return; 5504 } 5505 5506#ifdef ASSERT 5507 // Don't catch signals while blocked; let the running threads have the signals. 5508 // (This allows a debugger to break into the running thread.) 5509 sigset_t oldsigs; 5510 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5511 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5512#endif 5513 5514 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5515 jt->set_suspend_equivalent(); 5516 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5517 5518 // Do this the hard way by blocking ... 5519 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5520 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5521 // Only for SPARC >= V8PlusA 5522#if defined(__sparc) && defined(COMPILER2) 5523 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5524#endif 5525 5526 if (time == 0) { 5527 status = os::Solaris::cond_wait(_cond, _mutex); 5528 } else { 5529 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5530 } 5531 // Note that an untimed cond_wait() can sometimes return ETIME on older 5532 // versions of the Solaris. 5533 assert_status(status == 0 || status == EINTR || 5534 status == ETIME || status == ETIMEDOUT, 5535 status, "cond_timedwait"); 5536 5537#ifdef ASSERT 5538 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5539#endif 5540 _counter = 0; 5541 status = os::Solaris::mutex_unlock(_mutex); 5542 assert_status(status == 0, status, "mutex_unlock"); 5543 // Paranoia to ensure our locked and lock-free paths interact 5544 // correctly with each other and Java-level accesses. 5545 OrderAccess::fence(); 5546 5547 // If externally suspended while waiting, re-suspend 5548 if (jt->handle_special_suspend_equivalent_condition()) { 5549 jt->java_suspend_self(); 5550 } 5551} 5552 5553void Parker::unpark() { 5554 int status = os::Solaris::mutex_lock(_mutex); 5555 assert(status == 0, "invariant"); 5556 const int s = _counter; 5557 _counter = 1; 5558 status = os::Solaris::mutex_unlock(_mutex); 5559 assert(status == 0, "invariant"); 5560 5561 if (s < 1) { 5562 status = os::Solaris::cond_signal(_cond); 5563 assert(status == 0, "invariant"); 5564 } 5565} 5566 5567extern char** environ; 5568 5569// Run the specified command in a separate process. Return its exit value, 5570// or -1 on failure (e.g. can't fork a new process). 5571// Unlike system(), this function can be called from signal handler. It 5572// doesn't block SIGINT et al. 5573int os::fork_and_exec(char* cmd) { 5574 char * argv[4]; 5575 argv[0] = (char *)"sh"; 5576 argv[1] = (char *)"-c"; 5577 argv[2] = cmd; 5578 argv[3] = NULL; 5579 5580 // fork is async-safe, fork1 is not so can't use in signal handler 5581 pid_t pid; 5582 Thread* t = ThreadLocalStorage::get_thread_slow(); 5583 if (t != NULL && t->is_inside_signal_handler()) { 5584 pid = fork(); 5585 } else { 5586 pid = fork1(); 5587 } 5588 5589 if (pid < 0) { 5590 // fork failed 5591 warning("fork failed: %s", strerror(errno)); 5592 return -1; 5593 5594 } else if (pid == 0) { 5595 // child process 5596 5597 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5598 execve("/usr/bin/sh", argv, environ); 5599 5600 // execve failed 5601 _exit(-1); 5602 5603 } else { 5604 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5605 // care about the actual exit code, for now. 5606 5607 int status; 5608 5609 // Wait for the child process to exit. This returns immediately if 5610 // the child has already exited. */ 5611 while (waitpid(pid, &status, 0) < 0) { 5612 switch (errno) { 5613 case ECHILD: return 0; 5614 case EINTR: break; 5615 default: return -1; 5616 } 5617 } 5618 5619 if (WIFEXITED(status)) { 5620 // The child exited normally; get its exit code. 5621 return WEXITSTATUS(status); 5622 } else if (WIFSIGNALED(status)) { 5623 // The child exited because of a signal 5624 // The best value to return is 0x80 + signal number, 5625 // because that is what all Unix shells do, and because 5626 // it allows callers to distinguish between process exit and 5627 // process death by signal. 5628 return 0x80 + WTERMSIG(status); 5629 } else { 5630 // Unknown exit code; pass it through 5631 return status; 5632 } 5633 } 5634} 5635 5636// is_headless_jre() 5637// 5638// Test for the existence of xawt/libmawt.so or libawt_xawt.so 5639// in order to report if we are running in a headless jre 5640// 5641// Since JDK8 xawt/libmawt.so was moved into the same directory 5642// as libawt.so, and renamed libawt_xawt.so 5643// 5644bool os::is_headless_jre() { 5645 struct stat statbuf; 5646 char buf[MAXPATHLEN]; 5647 char libmawtpath[MAXPATHLEN]; 5648 const char *xawtstr = "/xawt/libmawt.so"; 5649 const char *new_xawtstr = "/libawt_xawt.so"; 5650 char *p; 5651 5652 // Get path to libjvm.so 5653 os::jvm_path(buf, sizeof(buf)); 5654 5655 // Get rid of libjvm.so 5656 p = strrchr(buf, '/'); 5657 if (p == NULL) { 5658 return false; 5659 } else { 5660 *p = '\0'; 5661 } 5662 5663 // Get rid of client or server 5664 p = strrchr(buf, '/'); 5665 if (p == NULL) { 5666 return false; 5667 } else { 5668 *p = '\0'; 5669 } 5670 5671 // check xawt/libmawt.so 5672 strcpy(libmawtpath, buf); 5673 strcat(libmawtpath, xawtstr); 5674 if (::stat(libmawtpath, &statbuf) == 0) return false; 5675 5676 // check libawt_xawt.so 5677 strcpy(libmawtpath, buf); 5678 strcat(libmawtpath, new_xawtstr); 5679 if (::stat(libmawtpath, &statbuf) == 0) return false; 5680 5681 return true; 5682} 5683 5684size_t os::write(int fd, const void *buf, unsigned int nBytes) { 5685 size_t res; 5686 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5687 "Assumed _thread_in_native"); 5688 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 5689 return res; 5690} 5691 5692int os::close(int fd) { 5693 return ::close(fd); 5694} 5695 5696int os::socket_close(int fd) { 5697 return ::close(fd); 5698} 5699 5700int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 5701 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5702 "Assumed _thread_in_native"); 5703 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags)); 5704} 5705 5706int os::send(int fd, char* buf, size_t nBytes, uint flags) { 5707 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5708 "Assumed _thread_in_native"); 5709 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5710} 5711 5712int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 5713 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5714} 5715 5716// As both poll and select can be interrupted by signals, we have to be 5717// prepared to restart the system call after updating the timeout, unless 5718// a poll() is done with timeout == -1, in which case we repeat with this 5719// "wait forever" value. 5720 5721int os::connect(int fd, struct sockaddr *him, socklen_t len) { 5722 int _result; 5723 _result = ::connect(fd, him, len); 5724 5725 // On Solaris, when a connect() call is interrupted, the connection 5726 // can be established asynchronously (see 6343810). Subsequent calls 5727 // to connect() must check the errno value which has the semantic 5728 // described below (copied from the connect() man page). Handling 5729 // of asynchronously established connections is required for both 5730 // blocking and non-blocking sockets. 5731 // EINTR The connection attempt was interrupted 5732 // before any data arrived by the delivery of 5733 // a signal. The connection, however, will be 5734 // established asynchronously. 5735 // 5736 // EINPROGRESS The socket is non-blocking, and the connec- 5737 // tion cannot be completed immediately. 5738 // 5739 // EALREADY The socket is non-blocking, and a previous 5740 // connection attempt has not yet been com- 5741 // pleted. 5742 // 5743 // EISCONN The socket is already connected. 5744 if (_result == OS_ERR && errno == EINTR) { 5745 // restarting a connect() changes its errno semantics 5746 RESTARTABLE(::connect(fd, him, len), _result); 5747 // undo these changes 5748 if (_result == OS_ERR) { 5749 if (errno == EALREADY) { 5750 errno = EINPROGRESS; // fall through 5751 } else if (errno == EISCONN) { 5752 errno = 0; 5753 return OS_OK; 5754 } 5755 } 5756 } 5757 return _result; 5758} 5759 5760// Get the default path to the core file 5761// Returns the length of the string 5762int os::get_core_path(char* buffer, size_t bufferSize) { 5763 const char* p = get_current_directory(buffer, bufferSize); 5764 5765 if (p == NULL) { 5766 assert(p != NULL, "failed to get current directory"); 5767 return 0; 5768 } 5769 5770 jio_snprintf(buffer, bufferSize, "%s/core or core.%d", 5771 p, current_process_id()); 5772 5773 return strlen(buffer); 5774} 5775 5776#ifndef PRODUCT 5777void TestReserveMemorySpecial_test() { 5778 // No tests available for this platform 5779} 5780#endif 5781 5782bool os::start_debugging(char *buf, int buflen) { 5783 int len = (int)strlen(buf); 5784 char *p = &buf[len]; 5785 5786 jio_snprintf(p, buflen-len, 5787 "\n\n" 5788 "Do you want to debug the problem?\n\n" 5789 "To debug, run 'dbx - %d'; then switch to thread " INTX_FORMAT "\n" 5790 "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n" 5791 "Otherwise, press RETURN to abort...", 5792 os::current_process_id(), os::current_thread_id()); 5793 5794 bool yes = os::message_box("Unexpected Error", buf); 5795 5796 if (yes) { 5797 // yes, user asked VM to launch debugger 5798 jio_snprintf(buf, sizeof(buf), "dbx - %d", os::current_process_id()); 5799 5800 os::fork_and_exec(buf); 5801 yes = false; 5802 } 5803 return yes; 5804} 5805