Mercurial > hg > truffle
annotate src/os/solaris/vm/os_solaris.cpp @ 267:9d6a3a6891f8
6720130: NUMA allocator: The linux version should search for libnuma.so.1
Summary: Search for libnuma.so.1 on Linux and liblgrp.so.1 on Solaris.
Reviewed-by: jmasa
| author | iveresov |
|---|---|
| date | Mon, 14 Jul 2008 04:12:47 -0700 |
| parents | e3729351c946 |
| children | d6340ab4105b |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // do not include precompiled header file | |
| 26 # include "incls/_os_solaris.cpp.incl" | |
| 27 | |
| 28 // put OS-includes here | |
| 29 # include <dlfcn.h> | |
| 30 # include <errno.h> | |
| 31 # include <link.h> | |
| 32 # include <poll.h> | |
| 33 # include <pthread.h> | |
| 34 # include <pwd.h> | |
| 35 # include <schedctl.h> | |
| 36 # include <setjmp.h> | |
| 37 # include <signal.h> | |
| 38 # include <stdio.h> | |
| 39 # include <alloca.h> | |
| 40 # include <sys/filio.h> | |
| 41 # include <sys/ipc.h> | |
| 42 # include <sys/lwp.h> | |
| 43 # include <sys/machelf.h> // for elf Sym structure used by dladdr1 | |
| 44 # include <sys/mman.h> | |
| 45 # include <sys/processor.h> | |
| 46 # include <sys/procset.h> | |
| 47 # include <sys/pset.h> | |
| 48 # include <sys/resource.h> | |
| 49 # include <sys/shm.h> | |
| 50 # include <sys/socket.h> | |
| 51 # include <sys/stat.h> | |
| 52 # include <sys/systeminfo.h> | |
| 53 # include <sys/time.h> | |
| 54 # include <sys/times.h> | |
| 55 # include <sys/types.h> | |
| 56 # include <sys/wait.h> | |
| 57 # include <sys/utsname.h> | |
| 58 # include <thread.h> | |
| 59 # include <unistd.h> | |
| 60 # include <sys/priocntl.h> | |
| 61 # include <sys/rtpriocntl.h> | |
| 62 # include <sys/tspriocntl.h> | |
| 63 # include <sys/iapriocntl.h> | |
| 64 # include <sys/loadavg.h> | |
| 65 # include <string.h> | |
| 66 | |
| 67 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later | |
| 68 # include <sys/procfs.h> // see comment in <sys/procfs.h> | |
| 69 | |
| 70 #define MAX_PATH (2 * K) | |
| 71 | |
| 72 // for timer info max values which include all bits | |
| 73 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) | |
| 74 | |
| 75 #ifdef _GNU_SOURCE | |
| 76 // See bug #6514594 | |
| 77 extern "C" int madvise(caddr_t, size_t, int); | |
| 78 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, | |
| 79 int attr, int mask); | |
| 80 #endif //_GNU_SOURCE | |
| 81 | |
| 82 /* | |
| 83 MPSS Changes Start. | |
| 84 The JVM binary needs to be built and run on pre-Solaris 9 | |
| 85 systems, but the constants needed by MPSS are only in Solaris 9 | |
| 86 header files. They are textually replicated here to allow | |
| 87 building on earlier systems. Once building on Solaris 8 is | |
| 88 no longer a requirement, these #defines can be replaced by ordinary | |
| 89 system .h inclusion. | |
| 90 | |
| 91 In earlier versions of the JDK and Solaris, we used ISM for large pages. | |
| 92 But ISM requires shared memory to achieve this and thus has many caveats. | |
| 93 MPSS is a fully transparent and is a cleaner way to get large pages. | |
| 94 Although we still require keeping ISM for backward compatiblitiy as well as | |
| 95 giving the opportunity to use large pages on older systems it is | |
| 96 recommended that MPSS be used for Solaris 9 and above. | |
| 97 | |
| 98 */ | |
| 99 | |
| 100 #ifndef MC_HAT_ADVISE | |
| 101 | |
| 102 struct memcntl_mha { | |
| 103 uint_t mha_cmd; /* command(s) */ | |
| 104 uint_t mha_flags; | |
| 105 size_t mha_pagesize; | |
| 106 }; | |
| 107 #define MC_HAT_ADVISE 7 /* advise hat map size */ | |
| 108 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ | |
| 109 #define MAP_ALIGN 0x200 /* addr specifies alignment */ | |
| 110 | |
| 111 #endif | |
| 112 // MPSS Changes End. | |
| 113 | |
| 114 | |
| 115 // Here are some liblgrp types from sys/lgrp_user.h to be able to | |
| 116 // compile on older systems without this header file. | |
| 117 | |
| 118 #ifndef MADV_ACCESS_LWP | |
| 119 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ | |
| 120 #endif | |
| 121 #ifndef MADV_ACCESS_MANY | |
| 122 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */ | |
| 123 #endif | |
| 124 | |
|
144
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125 #ifndef LGRP_RSRC_CPU |
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126 # define LGRP_RSRC_CPU 0 /* CPU resources */ |
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127 #endif |
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128 #ifndef LGRP_RSRC_MEM |
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129 # define LGRP_RSRC_MEM 1 /* memory resources */ |
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130 #endif |
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131 |
| 0 | 132 // Some more macros from sys/mman.h that are not present in Solaris 8. |
| 133 | |
| 134 #ifndef MAX_MEMINFO_CNT | |
| 135 /* | |
| 136 * info_req request type definitions for meminfo | |
| 137 * request types starting with MEMINFO_V are used for Virtual addresses | |
| 138 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical | |
| 139 * addresses | |
| 140 */ | |
| 141 # define MEMINFO_SHIFT 16 | |
| 142 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) | |
| 143 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ | |
| 144 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ | |
| 145 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ | |
| 146 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ | |
| 147 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ | |
| 148 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ | |
| 149 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ | |
| 150 | |
| 151 /* maximum number of addresses meminfo() can process at a time */ | |
| 152 # define MAX_MEMINFO_CNT 256 | |
| 153 | |
| 154 /* maximum number of request types */ | |
| 155 # define MAX_MEMINFO_REQ 31 | |
| 156 #endif | |
| 157 | |
| 158 // see thr_setprio(3T) for the basis of these numbers | |
| 159 #define MinimumPriority 0 | |
| 160 #define NormalPriority 64 | |
| 161 #define MaximumPriority 127 | |
| 162 | |
| 163 // Values for ThreadPriorityPolicy == 1 | |
| 164 int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64, | |
| 165 80, 96, 112, 124, 127 }; | |
| 166 | |
| 167 // System parameters used internally | |
| 168 static clock_t clock_tics_per_sec = 100; | |
| 169 | |
| 170 // For diagnostics to print a message once. see run_periodic_checks | |
| 171 static bool check_addr0_done = false; | |
| 172 static sigset_t check_signal_done; | |
| 173 static bool check_signals = true; | |
| 174 | |
| 175 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo | |
| 176 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo | |
| 177 | |
| 178 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround | |
| 179 | |
| 180 | |
| 181 // "default" initializers for missing libc APIs | |
| 182 extern "C" { | |
| 183 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } | |
| 184 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } | |
| 185 | |
| 186 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } | |
| 187 static int lwp_cond_destroy(cond_t *cv) { return 0; } | |
| 188 } | |
| 189 | |
| 190 // "default" initializers for pthread-based synchronization | |
| 191 extern "C" { | |
| 192 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } | |
| 193 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } | |
| 194 } | |
| 195 | |
| 196 // Thread Local Storage | |
| 197 // This is common to all Solaris platforms so it is defined here, | |
| 198 // in this common file. | |
| 199 // The declarations are in the os_cpu threadLS*.hpp files. | |
| 200 // | |
| 201 // Static member initialization for TLS | |
| 202 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; | |
| 203 | |
| 204 #ifndef PRODUCT | |
| 205 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) | |
| 206 | |
| 207 int ThreadLocalStorage::_tcacheHit = 0; | |
| 208 int ThreadLocalStorage::_tcacheMiss = 0; | |
| 209 | |
| 210 void ThreadLocalStorage::print_statistics() { | |
| 211 int total = _tcacheMiss+_tcacheHit; | |
| 212 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", | |
| 213 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); | |
| 214 } | |
| 215 #undef _PCT | |
| 216 #endif // PRODUCT | |
| 217 | |
| 218 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, | |
| 219 int index) { | |
| 220 Thread *thread = get_thread_slow(); | |
| 221 if (thread != NULL) { | |
| 222 address sp = os::current_stack_pointer(); | |
| 223 guarantee(thread->_stack_base == NULL || | |
| 224 (sp <= thread->_stack_base && | |
| 225 sp >= thread->_stack_base - thread->_stack_size) || | |
| 226 is_error_reported(), | |
| 227 "sp must be inside of selected thread stack"); | |
| 228 | |
| 229 thread->_self_raw_id = raw_id; // mark for quick retrieval | |
| 230 _get_thread_cache[ index ] = thread; | |
| 231 } | |
| 232 return thread; | |
| 233 } | |
| 234 | |
| 235 | |
| 236 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; | |
| 237 #define NO_CACHED_THREAD ((Thread*)all_zero) | |
| 238 | |
| 239 void ThreadLocalStorage::pd_set_thread(Thread* thread) { | |
| 240 | |
| 241 // Store the new value before updating the cache to prevent a race | |
| 242 // between get_thread_via_cache_slowly() and this store operation. | |
| 243 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); | |
| 244 | |
| 245 // Update thread cache with new thread if setting on thread create, | |
| 246 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. | |
| 247 uintptr_t raw = pd_raw_thread_id(); | |
| 248 int ix = pd_cache_index(raw); | |
| 249 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; | |
| 250 } | |
| 251 | |
| 252 void ThreadLocalStorage::pd_init() { | |
| 253 for (int i = 0; i < _pd_cache_size; i++) { | |
| 254 _get_thread_cache[i] = NO_CACHED_THREAD; | |
| 255 } | |
| 256 } | |
| 257 | |
| 258 // Invalidate all the caches (happens to be the same as pd_init). | |
| 259 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } | |
| 260 | |
| 261 #undef NO_CACHED_THREAD | |
| 262 | |
| 263 // END Thread Local Storage | |
| 264 | |
| 265 static inline size_t adjust_stack_size(address base, size_t size) { | |
| 266 if ((ssize_t)size < 0) { | |
| 267 // 4759953: Compensate for ridiculous stack size. | |
| 268 size = max_intx; | |
| 269 } | |
| 270 if (size > (size_t)base) { | |
| 271 // 4812466: Make sure size doesn't allow the stack to wrap the address space. | |
| 272 size = (size_t)base; | |
| 273 } | |
| 274 return size; | |
| 275 } | |
| 276 | |
| 277 static inline stack_t get_stack_info() { | |
| 278 stack_t st; | |
| 279 int retval = thr_stksegment(&st); | |
| 280 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); | |
| 281 assert(retval == 0, "incorrect return value from thr_stksegment"); | |
| 282 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); | |
| 283 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); | |
| 284 return st; | |
| 285 } | |
| 286 | |
| 287 address os::current_stack_base() { | |
| 288 int r = thr_main() ; | |
| 289 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; | |
| 290 bool is_primordial_thread = r; | |
| 291 | |
| 292 // Workaround 4352906, avoid calls to thr_stksegment by | |
| 293 // thr_main after the first one (it looks like we trash | |
| 294 // some data, causing the value for ss_sp to be incorrect). | |
| 295 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { | |
| 296 stack_t st = get_stack_info(); | |
| 297 if (is_primordial_thread) { | |
| 298 // cache initial value of stack base | |
| 299 os::Solaris::_main_stack_base = (address)st.ss_sp; | |
| 300 } | |
| 301 return (address)st.ss_sp; | |
| 302 } else { | |
| 303 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); | |
| 304 return os::Solaris::_main_stack_base; | |
| 305 } | |
| 306 } | |
| 307 | |
| 308 size_t os::current_stack_size() { | |
| 309 size_t size; | |
| 310 | |
| 311 int r = thr_main() ; | |
| 312 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; | |
| 313 if(!r) { | |
| 314 size = get_stack_info().ss_size; | |
| 315 } else { | |
| 316 struct rlimit limits; | |
| 317 getrlimit(RLIMIT_STACK, &limits); | |
| 318 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); | |
| 319 } | |
| 320 // base may not be page aligned | |
| 321 address base = current_stack_base(); | |
| 322 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; | |
| 323 return (size_t)(base - bottom); | |
| 324 } | |
| 325 | |
| 326 // interruptible infrastructure | |
| 327 | |
| 328 // setup_interruptible saves the thread state before going into an | |
| 329 // interruptible system call. | |
| 330 // The saved state is used to restore the thread to | |
| 331 // its former state whether or not an interrupt is received. | |
| 332 // Used by classloader os::read | |
| 333 // hpi calls skip this layer and stay in _thread_in_native | |
| 334 | |
| 335 void os::Solaris::setup_interruptible(JavaThread* thread) { | |
| 336 | |
| 337 JavaThreadState thread_state = thread->thread_state(); | |
| 338 | |
| 339 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); | |
| 340 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); | |
| 341 OSThread* osthread = thread->osthread(); | |
| 342 osthread->set_saved_interrupt_thread_state(thread_state); | |
| 343 thread->frame_anchor()->make_walkable(thread); | |
| 344 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); | |
| 345 } | |
| 346 | |
| 347 // Version of setup_interruptible() for threads that are already in | |
| 348 // _thread_blocked. Used by os_sleep(). | |
| 349 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { | |
| 350 thread->frame_anchor()->make_walkable(thread); | |
| 351 } | |
| 352 | |
| 353 JavaThread* os::Solaris::setup_interruptible() { | |
| 354 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); | |
| 355 setup_interruptible(thread); | |
| 356 return thread; | |
| 357 } | |
| 358 | |
| 359 void os::Solaris::try_enable_extended_io() { | |
| 360 typedef int (*enable_extended_FILE_stdio_t)(int, int); | |
| 361 | |
| 362 if (!UseExtendedFileIO) { | |
| 363 return; | |
| 364 } | |
| 365 | |
| 366 enable_extended_FILE_stdio_t enabler = | |
| 367 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, | |
| 368 "enable_extended_FILE_stdio"); | |
| 369 if (enabler) { | |
| 370 enabler(-1, -1); | |
| 371 } | |
| 372 } | |
| 373 | |
| 374 | |
| 375 #ifdef ASSERT | |
| 376 | |
| 377 JavaThread* os::Solaris::setup_interruptible_native() { | |
| 378 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); | |
| 379 JavaThreadState thread_state = thread->thread_state(); | |
| 380 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); | |
| 381 return thread; | |
| 382 } | |
| 383 | |
| 384 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { | |
| 385 JavaThreadState thread_state = thread->thread_state(); | |
| 386 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); | |
| 387 } | |
| 388 #endif | |
| 389 | |
| 390 // cleanup_interruptible reverses the effects of setup_interruptible | |
| 391 // setup_interruptible_already_blocked() does not need any cleanup. | |
| 392 | |
| 393 void os::Solaris::cleanup_interruptible(JavaThread* thread) { | |
| 394 OSThread* osthread = thread->osthread(); | |
| 395 | |
| 396 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); | |
| 397 } | |
| 398 | |
| 399 // I/O interruption related counters called in _INTERRUPTIBLE | |
| 400 | |
| 401 void os::Solaris::bump_interrupted_before_count() { | |
| 402 RuntimeService::record_interrupted_before_count(); | |
| 403 } | |
| 404 | |
| 405 void os::Solaris::bump_interrupted_during_count() { | |
| 406 RuntimeService::record_interrupted_during_count(); | |
| 407 } | |
| 408 | |
| 409 static int _processors_online = 0; | |
| 410 | |
| 411 jint os::Solaris::_os_thread_limit = 0; | |
| 412 volatile jint os::Solaris::_os_thread_count = 0; | |
| 413 | |
| 414 julong os::available_memory() { | |
| 415 return Solaris::available_memory(); | |
| 416 } | |
| 417 | |
| 418 julong os::Solaris::available_memory() { | |
| 419 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); | |
| 420 } | |
| 421 | |
| 422 julong os::Solaris::_physical_memory = 0; | |
| 423 | |
| 424 julong os::physical_memory() { | |
| 425 return Solaris::physical_memory(); | |
| 426 } | |
| 427 | |
| 428 julong os::allocatable_physical_memory(julong size) { | |
| 429 #ifdef _LP64 | |
| 430 return size; | |
| 431 #else | |
| 432 julong result = MIN2(size, (julong)3835*M); | |
| 433 if (!is_allocatable(result)) { | |
| 434 // Memory allocations will be aligned but the alignment | |
| 435 // is not known at this point. Alignments will | |
| 436 // be at most to LargePageSizeInBytes. Protect | |
| 437 // allocations from alignments up to illegal | |
| 438 // values. If at this point 2G is illegal. | |
| 439 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; | |
| 440 result = MIN2(size, reasonable_size); | |
| 441 } | |
| 442 return result; | |
| 443 #endif | |
| 444 } | |
| 445 | |
| 446 static hrtime_t first_hrtime = 0; | |
| 447 static const hrtime_t hrtime_hz = 1000*1000*1000; | |
| 448 const int LOCK_BUSY = 1; | |
| 449 const int LOCK_FREE = 0; | |
| 450 const int LOCK_INVALID = -1; | |
| 451 static volatile hrtime_t max_hrtime = 0; | |
| 452 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress | |
| 453 | |
| 454 | |
| 455 void os::Solaris::initialize_system_info() { | |
| 456 _processor_count = sysconf(_SC_NPROCESSORS_CONF); | |
| 457 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); | |
| 458 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); | |
| 459 } | |
| 460 | |
| 461 int os::active_processor_count() { | |
| 462 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); | |
| 463 pid_t pid = getpid(); | |
| 464 psetid_t pset = PS_NONE; | |
| 465 // Are we running in a processor set? | |
| 466 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { | |
| 467 if (pset != PS_NONE) { | |
| 468 uint_t pset_cpus; | |
| 469 // Query number of cpus in processor set | |
| 470 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { | |
| 471 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); | |
| 472 _processors_online = pset_cpus; | |
| 473 return pset_cpus; | |
| 474 } | |
| 475 } | |
| 476 } | |
| 477 // Otherwise return number of online cpus | |
| 478 return online_cpus; | |
| 479 } | |
| 480 | |
| 481 static bool find_processors_in_pset(psetid_t pset, | |
| 482 processorid_t** id_array, | |
| 483 uint_t* id_length) { | |
| 484 bool result = false; | |
| 485 // Find the number of processors in the processor set. | |
| 486 if (pset_info(pset, NULL, id_length, NULL) == 0) { | |
| 487 // Make up an array to hold their ids. | |
| 488 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); | |
| 489 // Fill in the array with their processor ids. | |
| 490 if (pset_info(pset, NULL, id_length, *id_array) == 0) { | |
| 491 result = true; | |
| 492 } | |
| 493 } | |
| 494 return result; | |
| 495 } | |
| 496 | |
| 497 // Callers of find_processors_online() must tolerate imprecise results -- | |
| 498 // the system configuration can change asynchronously because of DR | |
| 499 // or explicit psradm operations. | |
| 500 // | |
| 501 // We also need to take care that the loop (below) terminates as the | |
| 502 // number of processors online can change between the _SC_NPROCESSORS_ONLN | |
| 503 // request and the loop that builds the list of processor ids. Unfortunately | |
| 504 // there's no reliable way to determine the maximum valid processor id, | |
| 505 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online | |
| 506 // man pages, which claim the processor id set is "sparse, but | |
| 507 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually | |
| 508 // exit the loop. | |
| 509 // | |
| 510 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's | |
| 511 // not available on S8.0. | |
| 512 | |
| 513 static bool find_processors_online(processorid_t** id_array, | |
| 514 uint* id_length) { | |
| 515 const processorid_t MAX_PROCESSOR_ID = 100000 ; | |
| 516 // Find the number of processors online. | |
| 517 *id_length = sysconf(_SC_NPROCESSORS_ONLN); | |
| 518 // Make up an array to hold their ids. | |
| 519 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); | |
| 520 // Processors need not be numbered consecutively. | |
| 521 long found = 0; | |
| 522 processorid_t next = 0; | |
| 523 while (found < *id_length && next < MAX_PROCESSOR_ID) { | |
| 524 processor_info_t info; | |
| 525 if (processor_info(next, &info) == 0) { | |
| 526 // NB, PI_NOINTR processors are effectively online ... | |
| 527 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { | |
| 528 (*id_array)[found] = next; | |
| 529 found += 1; | |
| 530 } | |
| 531 } | |
| 532 next += 1; | |
| 533 } | |
| 534 if (found < *id_length) { | |
| 535 // The loop above didn't identify the expected number of processors. | |
| 536 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) | |
| 537 // and re-running the loop, above, but there's no guarantee of progress | |
| 538 // if the system configuration is in flux. Instead, we just return what | |
| 539 // we've got. Note that in the worst case find_processors_online() could | |
| 540 // return an empty set. (As a fall-back in the case of the empty set we | |
| 541 // could just return the ID of the current processor). | |
| 542 *id_length = found ; | |
| 543 } | |
| 544 | |
| 545 return true; | |
| 546 } | |
| 547 | |
| 548 static bool assign_distribution(processorid_t* id_array, | |
| 549 uint id_length, | |
| 550 uint* distribution, | |
| 551 uint distribution_length) { | |
| 552 // We assume we can assign processorid_t's to uint's. | |
| 553 assert(sizeof(processorid_t) == sizeof(uint), | |
| 554 "can't convert processorid_t to uint"); | |
| 555 // Quick check to see if we won't succeed. | |
| 556 if (id_length < distribution_length) { | |
| 557 return false; | |
| 558 } | |
| 559 // Assign processor ids to the distribution. | |
| 560 // Try to shuffle processors to distribute work across boards, | |
| 561 // assuming 4 processors per board. | |
| 562 const uint processors_per_board = ProcessDistributionStride; | |
| 563 // Find the maximum processor id. | |
| 564 processorid_t max_id = 0; | |
| 565 for (uint m = 0; m < id_length; m += 1) { | |
| 566 max_id = MAX2(max_id, id_array[m]); | |
| 567 } | |
| 568 // The next id, to limit loops. | |
| 569 const processorid_t limit_id = max_id + 1; | |
| 570 // Make up markers for available processors. | |
| 571 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); | |
| 572 for (uint c = 0; c < limit_id; c += 1) { | |
| 573 available_id[c] = false; | |
| 574 } | |
| 575 for (uint a = 0; a < id_length; a += 1) { | |
| 576 available_id[id_array[a]] = true; | |
| 577 } | |
| 578 // Step by "boards", then by "slot", copying to "assigned". | |
| 579 // NEEDS_CLEANUP: The assignment of processors should be stateful, | |
| 580 // remembering which processors have been assigned by | |
| 581 // previous calls, etc., so as to distribute several | |
| 582 // independent calls of this method. What we'd like is | |
| 583 // It would be nice to have an API that let us ask | |
| 584 // how many processes are bound to a processor, | |
| 585 // but we don't have that, either. | |
| 586 // In the short term, "board" is static so that | |
| 587 // subsequent distributions don't all start at board 0. | |
| 588 static uint board = 0; | |
| 589 uint assigned = 0; | |
| 590 // Until we've found enough processors .... | |
| 591 while (assigned < distribution_length) { | |
| 592 // ... find the next available processor in the board. | |
| 593 for (uint slot = 0; slot < processors_per_board; slot += 1) { | |
| 594 uint try_id = board * processors_per_board + slot; | |
| 595 if ((try_id < limit_id) && (available_id[try_id] == true)) { | |
| 596 distribution[assigned] = try_id; | |
| 597 available_id[try_id] = false; | |
| 598 assigned += 1; | |
| 599 break; | |
| 600 } | |
| 601 } | |
| 602 board += 1; | |
| 603 if (board * processors_per_board + 0 >= limit_id) { | |
| 604 board = 0; | |
| 605 } | |
| 606 } | |
| 607 if (available_id != NULL) { | |
| 608 FREE_C_HEAP_ARRAY(bool, available_id); | |
| 609 } | |
| 610 return true; | |
| 611 } | |
| 612 | |
| 613 bool os::distribute_processes(uint length, uint* distribution) { | |
| 614 bool result = false; | |
| 615 // Find the processor id's of all the available CPUs. | |
| 616 processorid_t* id_array = NULL; | |
| 617 uint id_length = 0; | |
| 618 // There are some races between querying information and using it, | |
| 619 // since processor sets can change dynamically. | |
| 620 psetid_t pset = PS_NONE; | |
| 621 // Are we running in a processor set? | |
| 622 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { | |
| 623 result = find_processors_in_pset(pset, &id_array, &id_length); | |
| 624 } else { | |
| 625 result = find_processors_online(&id_array, &id_length); | |
| 626 } | |
| 627 if (result == true) { | |
| 628 if (id_length >= length) { | |
| 629 result = assign_distribution(id_array, id_length, distribution, length); | |
| 630 } else { | |
| 631 result = false; | |
| 632 } | |
| 633 } | |
| 634 if (id_array != NULL) { | |
| 635 FREE_C_HEAP_ARRAY(processorid_t, id_array); | |
| 636 } | |
| 637 return result; | |
| 638 } | |
| 639 | |
| 640 bool os::bind_to_processor(uint processor_id) { | |
| 641 // We assume that a processorid_t can be stored in a uint. | |
| 642 assert(sizeof(uint) == sizeof(processorid_t), | |
| 643 "can't convert uint to processorid_t"); | |
| 644 int bind_result = | |
| 645 processor_bind(P_LWPID, // bind LWP. | |
| 646 P_MYID, // bind current LWP. | |
| 647 (processorid_t) processor_id, // id. | |
| 648 NULL); // don't return old binding. | |
| 649 return (bind_result == 0); | |
| 650 } | |
| 651 | |
| 652 bool os::getenv(const char* name, char* buffer, int len) { | |
| 653 char* val = ::getenv( name ); | |
| 654 if ( val == NULL | |
| 655 || strlen(val) + 1 > len ) { | |
| 656 if (len > 0) buffer[0] = 0; // return a null string | |
| 657 return false; | |
| 658 } | |
| 659 strcpy( buffer, val ); | |
| 660 return true; | |
| 661 } | |
| 662 | |
| 663 | |
| 664 // Return true if user is running as root. | |
| 665 | |
| 666 bool os::have_special_privileges() { | |
| 667 static bool init = false; | |
| 668 static bool privileges = false; | |
| 669 if (!init) { | |
| 670 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
| 671 init = true; | |
| 672 } | |
| 673 return privileges; | |
| 674 } | |
| 675 | |
| 676 | |
| 677 static char* get_property(char* name, char* buffer, int buffer_size) { | |
| 678 if (os::getenv(name, buffer, buffer_size)) { | |
| 679 return buffer; | |
| 680 } | |
| 681 static char empty[] = ""; | |
| 682 return empty; | |
| 683 } | |
| 684 | |
| 685 | |
| 686 void os::init_system_properties_values() { | |
| 687 char arch[12]; | |
| 688 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); | |
| 689 | |
| 690 // The next steps are taken in the product version: | |
| 691 // | |
| 692 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. | |
| 693 // This library should be located at: | |
| 694 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. | |
| 695 // | |
| 696 // If "/jre/lib/" appears at the right place in the path, then we | |
| 697 // assume libjvm[_g].so is installed in a JDK and we use this path. | |
| 698 // | |
| 699 // Otherwise exit with message: "Could not create the Java virtual machine." | |
| 700 // | |
| 701 // The following extra steps are taken in the debugging version: | |
| 702 // | |
| 703 // If "/jre/lib/" does NOT appear at the right place in the path | |
| 704 // instead of exit check for $JAVA_HOME environment variable. | |
| 705 // | |
| 706 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, | |
| 707 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so | |
| 708 // it looks like libjvm[_g].so is installed there | |
| 709 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. | |
| 710 // | |
| 711 // Otherwise exit. | |
| 712 // | |
| 713 // Important note: if the location of libjvm.so changes this | |
| 714 // code needs to be changed accordingly. | |
| 715 | |
| 716 // The next few definitions allow the code to be verbatim: | |
| 717 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) | |
| 718 #define free(p) FREE_C_HEAP_ARRAY(char, p) | |
| 719 #define getenv(n) ::getenv(n) | |
| 720 | |
| 721 #define EXTENSIONS_DIR "/lib/ext" | |
| 722 #define ENDORSED_DIR "/lib/endorsed" | |
| 723 #define COMMON_DIR "/usr/jdk/packages" | |
| 724 | |
| 725 { | |
| 726 /* sysclasspath, java_home, dll_dir */ | |
| 727 { | |
| 728 char *home_path; | |
| 729 char *dll_path; | |
| 730 char *pslash; | |
| 731 char buf[MAXPATHLEN]; | |
| 732 os::jvm_path(buf, sizeof(buf)); | |
| 733 | |
| 734 // Found the full path to libjvm.so. | |
| 735 // Now cut the path to <java_home>/jre if we can. | |
| 736 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ | |
| 737 pslash = strrchr(buf, '/'); | |
| 738 if (pslash != NULL) | |
| 739 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ | |
| 740 dll_path = malloc(strlen(buf) + 1); | |
| 741 if (dll_path == NULL) | |
| 742 return; | |
| 743 strcpy(dll_path, buf); | |
| 744 Arguments::set_dll_dir(dll_path); | |
| 745 | |
| 746 if (pslash != NULL) { | |
| 747 pslash = strrchr(buf, '/'); | |
| 748 if (pslash != NULL) { | |
| 749 *pslash = '\0'; /* get rid of /<arch> */ | |
| 750 pslash = strrchr(buf, '/'); | |
| 751 if (pslash != NULL) | |
| 752 *pslash = '\0'; /* get rid of /lib */ | |
| 753 } | |
| 754 } | |
| 755 | |
| 756 home_path = malloc(strlen(buf) + 1); | |
| 757 if (home_path == NULL) | |
| 758 return; | |
| 759 strcpy(home_path, buf); | |
| 760 Arguments::set_java_home(home_path); | |
| 761 | |
| 762 if (!set_boot_path('/', ':')) | |
| 763 return; | |
| 764 } | |
| 765 | |
| 766 /* | |
| 767 * Where to look for native libraries | |
| 768 */ | |
| 769 { | |
| 770 // Use dlinfo() to determine the correct java.library.path. | |
| 771 // | |
| 772 // If we're launched by the Java launcher, and the user | |
| 773 // does not set java.library.path explicitly on the commandline, | |
| 774 // the Java launcher sets LD_LIBRARY_PATH for us and unsets | |
| 775 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case | |
| 776 // dlinfo returns LD_LIBRARY_PATH + crle settings (including | |
| 777 // /usr/lib), which is exactly what we want. | |
| 778 // | |
| 779 // If the user does set java.library.path, it completely | |
| 780 // overwrites this setting, and always has. | |
| 781 // | |
| 782 // If we're not launched by the Java launcher, we may | |
| 783 // get here with any/all of the LD_LIBRARY_PATH[_32|64] | |
| 784 // settings. Again, dlinfo does exactly what we want. | |
| 785 | |
| 786 Dl_serinfo _info, *info = &_info; | |
| 787 Dl_serpath *path; | |
| 788 char* library_path; | |
| 789 char *common_path; | |
| 790 int i; | |
| 791 | |
| 792 // determine search path count and required buffer size | |
| 793 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { | |
| 794 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); | |
| 795 } | |
| 796 | |
| 797 // allocate new buffer and initialize | |
| 798 info = (Dl_serinfo*)malloc(_info.dls_size); | |
| 799 if (info == NULL) { | |
| 800 vm_exit_out_of_memory(_info.dls_size, | |
| 801 "init_system_properties_values info"); | |
| 802 } | |
| 803 info->dls_size = _info.dls_size; | |
| 804 info->dls_cnt = _info.dls_cnt; | |
| 805 | |
| 806 // obtain search path information | |
| 807 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { | |
| 808 free(info); | |
| 809 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); | |
| 810 } | |
| 811 | |
| 812 path = &info->dls_serpath[0]; | |
| 813 | |
| 814 // Note: Due to a legacy implementation, most of the library path | |
| 815 // is set in the launcher. This was to accomodate linking restrictions | |
| 816 // on legacy Solaris implementations (which are no longer supported). | |
| 817 // Eventually, all the library path setting will be done here. | |
| 818 // | |
| 819 // However, to prevent the proliferation of improperly built native | |
| 820 // libraries, the new path component /usr/jdk/packages is added here. | |
| 821 | |
| 822 // Determine the actual CPU architecture. | |
| 823 char cpu_arch[12]; | |
| 824 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); | |
| 825 #ifdef _LP64 | |
| 826 // If we are a 64-bit vm, perform the following translations: | |
| 827 // sparc -> sparcv9 | |
| 828 // i386 -> amd64 | |
| 829 if (strcmp(cpu_arch, "sparc") == 0) | |
| 830 strcat(cpu_arch, "v9"); | |
| 831 else if (strcmp(cpu_arch, "i386") == 0) | |
| 832 strcpy(cpu_arch, "amd64"); | |
| 833 #endif | |
| 834 | |
| 835 // Construct the invariant part of ld_library_path. Note that the | |
| 836 // space for the colon and the trailing null are provided by the | |
| 837 // nulls included by the sizeof operator. | |
| 838 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); | |
| 839 common_path = malloc(bufsize); | |
| 840 if (common_path == NULL) { | |
| 841 free(info); | |
| 842 vm_exit_out_of_memory(bufsize, | |
| 843 "init_system_properties_values common_path"); | |
| 844 } | |
| 845 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); | |
| 846 | |
| 847 // struct size is more than sufficient for the path components obtained | |
| 848 // through the dlinfo() call, so only add additional space for the path | |
| 849 // components explicitly added here. | |
| 850 bufsize = info->dls_size + strlen(common_path); | |
| 851 library_path = malloc(bufsize); | |
| 852 if (library_path == NULL) { | |
| 853 free(info); | |
| 854 free(common_path); | |
| 855 vm_exit_out_of_memory(bufsize, | |
| 856 "init_system_properties_values library_path"); | |
| 857 } | |
| 858 library_path[0] = '\0'; | |
| 859 | |
| 860 // Construct the desired Java library path from the linker's library | |
| 861 // search path. | |
| 862 // | |
| 863 // For compatibility, it is optimal that we insert the additional path | |
| 864 // components specific to the Java VM after those components specified | |
| 865 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so | |
| 866 // infrastructure. | |
| 867 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it | |
| 868 strcpy(library_path, common_path); | |
| 869 } else { | |
| 870 int inserted = 0; | |
| 871 for (i = 0; i < info->dls_cnt; i++, path++) { | |
| 872 uint_t flags = path->dls_flags & LA_SER_MASK; | |
| 873 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { | |
| 874 strcat(library_path, common_path); | |
| 875 strcat(library_path, os::path_separator()); | |
| 876 inserted = 1; | |
| 877 } | |
| 878 strcat(library_path, path->dls_name); | |
| 879 strcat(library_path, os::path_separator()); | |
| 880 } | |
| 881 // eliminate trailing path separator | |
| 882 library_path[strlen(library_path)-1] = '\0'; | |
| 883 } | |
| 884 | |
| 885 // happens before argument parsing - can't use a trace flag | |
| 886 // tty->print_raw("init_system_properties_values: native lib path: "); | |
| 887 // tty->print_raw_cr(library_path); | |
| 888 | |
| 889 // callee copies into its own buffer | |
| 890 Arguments::set_library_path(library_path); | |
| 891 | |
| 892 free(common_path); | |
| 893 free(library_path); | |
| 894 free(info); | |
| 895 } | |
| 896 | |
| 897 /* | |
| 898 * Extensions directories. | |
| 899 * | |
| 900 * Note that the space for the colon and the trailing null are provided | |
| 901 * by the nulls included by the sizeof operator (so actually one byte more | |
| 902 * than necessary is allocated). | |
| 903 */ | |
| 904 { | |
| 905 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + | |
| 906 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + | |
| 907 sizeof(EXTENSIONS_DIR)); | |
| 908 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, | |
| 909 Arguments::get_java_home()); | |
| 910 Arguments::set_ext_dirs(buf); | |
| 911 } | |
| 912 | |
| 913 /* Endorsed standards default directory. */ | |
| 914 { | |
| 915 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); | |
| 916 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); | |
| 917 Arguments::set_endorsed_dirs(buf); | |
| 918 } | |
| 919 } | |
| 920 | |
| 921 #undef malloc | |
| 922 #undef free | |
| 923 #undef getenv | |
| 924 #undef EXTENSIONS_DIR | |
| 925 #undef ENDORSED_DIR | |
| 926 #undef COMMON_DIR | |
| 927 | |
| 928 } | |
| 929 | |
| 930 void os::breakpoint() { | |
| 931 BREAKPOINT; | |
| 932 } | |
| 933 | |
| 934 bool os::obsolete_option(const JavaVMOption *option) | |
| 935 { | |
| 936 if (!strncmp(option->optionString, "-Xt", 3)) { | |
| 937 return true; | |
| 938 } else if (!strncmp(option->optionString, "-Xtm", 4)) { | |
| 939 return true; | |
| 940 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { | |
| 941 return true; | |
| 942 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { | |
| 943 return true; | |
| 944 } | |
| 945 return false; | |
| 946 } | |
| 947 | |
| 948 bool os::Solaris::valid_stack_address(Thread* thread, address sp) { | |
| 949 address stackStart = (address)thread->stack_base(); | |
| 950 address stackEnd = (address)(stackStart - (address)thread->stack_size()); | |
| 951 if (sp < stackStart && sp >= stackEnd ) return true; | |
| 952 return false; | |
| 953 } | |
| 954 | |
| 955 extern "C" void breakpoint() { | |
| 956 // use debugger to set breakpoint here | |
| 957 } | |
| 958 | |
| 959 // Returns an estimate of the current stack pointer. Result must be guaranteed to | |
| 960 // point into the calling threads stack, and be no lower than the current stack | |
| 961 // pointer. | |
| 962 address os::current_stack_pointer() { | |
| 963 volatile int dummy; | |
| 964 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right | |
| 965 return sp; | |
| 966 } | |
| 967 | |
| 968 static thread_t main_thread; | |
| 969 | |
| 970 // Thread start routine for all new Java threads | |
| 971 extern "C" void* java_start(void* thread_addr) { | |
| 972 // Try to randomize the cache line index of hot stack frames. | |
| 973 // This helps when threads of the same stack traces evict each other's | |
| 974 // cache lines. The threads can be either from the same JVM instance, or | |
| 975 // from different JVM instances. The benefit is especially true for | |
| 976 // processors with hyperthreading technology. | |
| 977 static int counter = 0; | |
| 978 int pid = os::current_process_id(); | |
| 979 alloca(((pid ^ counter++) & 7) * 128); | |
| 980 | |
| 981 int prio; | |
| 982 Thread* thread = (Thread*)thread_addr; | |
| 983 OSThread* osthr = thread->osthread(); | |
| 984 | |
| 985 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound | |
| 986 thread->_schedctl = (void *) schedctl_init () ; | |
| 987 | |
| 988 if (UseNUMA) { | |
| 989 int lgrp_id = os::numa_get_group_id(); | |
| 990 if (lgrp_id != -1) { | |
| 991 thread->set_lgrp_id(lgrp_id); | |
| 992 } | |
| 993 } | |
| 994 | |
| 995 // If the creator called set priority before we started, | |
| 996 // we need to call set priority now that we have an lwp. | |
| 997 // Get the priority from libthread and set the priority | |
| 998 // for the new Solaris lwp. | |
| 999 if ( osthr->thread_id() != -1 ) { | |
| 1000 if ( UseThreadPriorities ) { | |
| 1001 thr_getprio(osthr->thread_id(), &prio); | |
| 1002 if (ThreadPriorityVerbose) { | |
| 1003 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", | |
| 1004 osthr->thread_id(), osthr->lwp_id(), prio ); | |
| 1005 } | |
| 1006 os::set_native_priority(thread, prio); | |
| 1007 } | |
| 1008 } else if (ThreadPriorityVerbose) { | |
| 1009 warning("Can't set priority in _start routine, thread id hasn't been set\n"); | |
| 1010 } | |
| 1011 | |
| 1012 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); | |
| 1013 | |
| 1014 // initialize signal mask for this thread | |
| 1015 os::Solaris::hotspot_sigmask(thread); | |
| 1016 | |
| 1017 thread->run(); | |
| 1018 | |
| 1019 // One less thread is executing | |
| 1020 // When the VMThread gets here, the main thread may have already exited | |
| 1021 // which frees the CodeHeap containing the Atomic::dec code | |
| 1022 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { | |
| 1023 Atomic::dec(&os::Solaris::_os_thread_count); | |
| 1024 } | |
| 1025 | |
| 1026 if (UseDetachedThreads) { | |
| 1027 thr_exit(NULL); | |
| 1028 ShouldNotReachHere(); | |
| 1029 } | |
| 1030 return NULL; | |
| 1031 } | |
| 1032 | |
| 1033 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { | |
| 1034 // Allocate the OSThread object | |
| 1035 OSThread* osthread = new OSThread(NULL, NULL); | |
| 1036 if (osthread == NULL) return NULL; | |
| 1037 | |
| 1038 // Store info on the Solaris thread into the OSThread | |
| 1039 osthread->set_thread_id(thread_id); | |
| 1040 osthread->set_lwp_id(_lwp_self()); | |
| 1041 thread->_schedctl = (void *) schedctl_init () ; | |
| 1042 | |
| 1043 if (UseNUMA) { | |
| 1044 int lgrp_id = os::numa_get_group_id(); | |
| 1045 if (lgrp_id != -1) { | |
| 1046 thread->set_lgrp_id(lgrp_id); | |
| 1047 } | |
| 1048 } | |
| 1049 | |
| 1050 if ( ThreadPriorityVerbose ) { | |
| 1051 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", | |
| 1052 osthread->thread_id(), osthread->lwp_id() ); | |
| 1053 } | |
| 1054 | |
| 1055 // Initial thread state is INITIALIZED, not SUSPENDED | |
| 1056 osthread->set_state(INITIALIZED); | |
| 1057 | |
| 1058 return osthread; | |
| 1059 } | |
| 1060 | |
| 1061 void os::Solaris::hotspot_sigmask(Thread* thread) { | |
| 1062 | |
| 1063 //Save caller's signal mask | |
| 1064 sigset_t sigmask; | |
| 1065 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); | |
| 1066 OSThread *osthread = thread->osthread(); | |
| 1067 osthread->set_caller_sigmask(sigmask); | |
| 1068 | |
| 1069 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); | |
| 1070 if (!ReduceSignalUsage) { | |
| 1071 if (thread->is_VM_thread()) { | |
| 1072 // Only the VM thread handles BREAK_SIGNAL ... | |
| 1073 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); | |
| 1074 } else { | |
| 1075 // ... all other threads block BREAK_SIGNAL | |
| 1076 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); | |
| 1077 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); | |
| 1078 } | |
| 1079 } | |
| 1080 } | |
| 1081 | |
| 1082 bool os::create_attached_thread(JavaThread* thread) { | |
| 1083 #ifdef ASSERT | |
| 1084 thread->verify_not_published(); | |
| 1085 #endif | |
| 1086 OSThread* osthread = create_os_thread(thread, thr_self()); | |
| 1087 if (osthread == NULL) { | |
| 1088 return false; | |
| 1089 } | |
| 1090 | |
| 1091 // Initial thread state is RUNNABLE | |
| 1092 osthread->set_state(RUNNABLE); | |
| 1093 thread->set_osthread(osthread); | |
| 1094 | |
| 1095 // initialize signal mask for this thread | |
| 1096 // and save the caller's signal mask | |
| 1097 os::Solaris::hotspot_sigmask(thread); | |
| 1098 | |
| 1099 return true; | |
| 1100 } | |
| 1101 | |
| 1102 bool os::create_main_thread(JavaThread* thread) { | |
| 1103 #ifdef ASSERT | |
| 1104 thread->verify_not_published(); | |
| 1105 #endif | |
| 1106 if (_starting_thread == NULL) { | |
| 1107 _starting_thread = create_os_thread(thread, main_thread); | |
| 1108 if (_starting_thread == NULL) { | |
| 1109 return false; | |
| 1110 } | |
| 1111 } | |
| 1112 | |
| 1113 // The primodial thread is runnable from the start | |
| 1114 _starting_thread->set_state(RUNNABLE); | |
| 1115 | |
| 1116 thread->set_osthread(_starting_thread); | |
| 1117 | |
| 1118 // initialize signal mask for this thread | |
| 1119 // and save the caller's signal mask | |
| 1120 os::Solaris::hotspot_sigmask(thread); | |
| 1121 | |
| 1122 return true; | |
| 1123 } | |
| 1124 | |
| 1125 // _T2_libthread is true if we believe we are running with the newer | |
| 1126 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default) | |
| 1127 bool os::Solaris::_T2_libthread = false; | |
| 1128 | |
| 1129 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
| 1130 // Allocate the OSThread object | |
| 1131 OSThread* osthread = new OSThread(NULL, NULL); | |
| 1132 if (osthread == NULL) { | |
| 1133 return false; | |
| 1134 } | |
| 1135 | |
| 1136 if ( ThreadPriorityVerbose ) { | |
| 1137 char *thrtyp; | |
| 1138 switch ( thr_type ) { | |
| 1139 case vm_thread: | |
| 1140 thrtyp = (char *)"vm"; | |
| 1141 break; | |
| 1142 case cgc_thread: | |
| 1143 thrtyp = (char *)"cgc"; | |
| 1144 break; | |
| 1145 case pgc_thread: | |
| 1146 thrtyp = (char *)"pgc"; | |
| 1147 break; | |
| 1148 case java_thread: | |
| 1149 thrtyp = (char *)"java"; | |
| 1150 break; | |
| 1151 case compiler_thread: | |
| 1152 thrtyp = (char *)"compiler"; | |
| 1153 break; | |
| 1154 case watcher_thread: | |
| 1155 thrtyp = (char *)"watcher"; | |
| 1156 break; | |
| 1157 default: | |
| 1158 thrtyp = (char *)"unknown"; | |
| 1159 break; | |
| 1160 } | |
| 1161 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); | |
| 1162 } | |
| 1163 | |
| 1164 // Calculate stack size if it's not specified by caller. | |
| 1165 if (stack_size == 0) { | |
| 1166 // The default stack size 1M (2M for LP64). | |
| 1167 stack_size = (BytesPerWord >> 2) * K * K; | |
| 1168 | |
| 1169 switch (thr_type) { | |
| 1170 case os::java_thread: | |
| 1171 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss | |
| 1172 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); | |
| 1173 break; | |
| 1174 case os::compiler_thread: | |
| 1175 if (CompilerThreadStackSize > 0) { | |
| 1176 stack_size = (size_t)(CompilerThreadStackSize * K); | |
| 1177 break; | |
| 1178 } // else fall through: | |
| 1179 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
| 1180 case os::vm_thread: | |
| 1181 case os::pgc_thread: | |
| 1182 case os::cgc_thread: | |
| 1183 case os::watcher_thread: | |
| 1184 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
| 1185 break; | |
| 1186 } | |
| 1187 } | |
| 1188 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); | |
| 1189 | |
| 1190 // Initial state is ALLOCATED but not INITIALIZED | |
| 1191 osthread->set_state(ALLOCATED); | |
| 1192 | |
| 1193 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { | |
| 1194 // We got lots of threads. Check if we still have some address space left. | |
| 1195 // Need to be at least 5Mb of unreserved address space. We do check by | |
| 1196 // trying to reserve some. | |
| 1197 const size_t VirtualMemoryBangSize = 20*K*K; | |
| 1198 char* mem = os::reserve_memory(VirtualMemoryBangSize); | |
| 1199 if (mem == NULL) { | |
| 1200 delete osthread; | |
| 1201 return false; | |
| 1202 } else { | |
| 1203 // Release the memory again | |
| 1204 os::release_memory(mem, VirtualMemoryBangSize); | |
| 1205 } | |
| 1206 } | |
| 1207 | |
| 1208 // Setup osthread because the child thread may need it. | |
| 1209 thread->set_osthread(osthread); | |
| 1210 | |
| 1211 // Create the Solaris thread | |
| 1212 // explicit THR_BOUND for T2_libthread case in case | |
| 1213 // that assumption is not accurate, but our alternate signal stack | |
| 1214 // handling is based on it which must have bound threads | |
| 1215 thread_t tid = 0; | |
| 1216 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED | |
| 1217 | ((UseBoundThreads || os::Solaris::T2_libthread() || | |
| 1218 (thr_type == vm_thread) || | |
| 1219 (thr_type == cgc_thread) || | |
| 1220 (thr_type == pgc_thread) || | |
| 1221 (thr_type == compiler_thread && BackgroundCompilation)) ? | |
| 1222 THR_BOUND : 0); | |
| 1223 int status; | |
| 1224 | |
| 1225 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. | |
| 1226 // | |
| 1227 // On multiprocessors systems, libthread sometimes under-provisions our | |
| 1228 // process with LWPs. On a 30-way systems, for instance, we could have | |
| 1229 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned | |
| 1230 // to our process. This can result in under utilization of PEs. | |
| 1231 // I suspect the problem is related to libthread's LWP | |
| 1232 // pool management and to the kernel's SIGBLOCKING "last LWP parked" | |
| 1233 // upcall policy. | |
| 1234 // | |
| 1235 // The following code is palliative -- it attempts to ensure that our | |
| 1236 // process has sufficient LWPs to take advantage of multiple PEs. | |
| 1237 // Proper long-term cures include using user-level threads bound to LWPs | |
| 1238 // (THR_BOUND) or using LWP-based synchronization. Note that there is a | |
| 1239 // slight timing window with respect to sampling _os_thread_count, but | |
| 1240 // the race is benign. Also, we should periodically recompute | |
| 1241 // _processors_online as the min of SC_NPROCESSORS_ONLN and the | |
| 1242 // the number of PEs in our partition. You might be tempted to use | |
| 1243 // THR_NEW_LWP here, but I'd recommend against it as that could | |
| 1244 // result in undesirable growth of the libthread's LWP pool. | |
| 1245 // The fix below isn't sufficient; for instance, it doesn't take into count | |
| 1246 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. | |
| 1247 // | |
| 1248 // Some pathologies this scheme doesn't handle: | |
| 1249 // * Threads can block, releasing the LWPs. The LWPs can age out. | |
| 1250 // When a large number of threads become ready again there aren't | |
| 1251 // enough LWPs available to service them. This can occur when the | |
| 1252 // number of ready threads oscillates. | |
| 1253 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. | |
| 1254 // | |
| 1255 // Finally, we should call thr_setconcurrency() periodically to refresh | |
| 1256 // the LWP pool and thwart the LWP age-out mechanism. | |
| 1257 // The "+3" term provides a little slop -- we want to slightly overprovision. | |
| 1258 | |
| 1259 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { | |
| 1260 if (!(flags & THR_BOUND)) { | |
| 1261 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation | |
| 1262 } | |
| 1263 } | |
| 1264 // Although this doesn't hurt, we should warn of undefined behavior | |
| 1265 // when using unbound T1 threads with schedctl(). This should never | |
| 1266 // happen, as the compiler and VM threads are always created bound | |
| 1267 DEBUG_ONLY( | |
| 1268 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && | |
| 1269 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && | |
| 1270 ((thr_type == vm_thread) || (thr_type == cgc_thread) || | |
| 1271 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { | |
| 1272 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); | |
| 1273 } | |
| 1274 ); | |
| 1275 | |
| 1276 | |
| 1277 // Mark that we don't have an lwp or thread id yet. | |
| 1278 // In case we attempt to set the priority before the thread starts. | |
| 1279 osthread->set_lwp_id(-1); | |
| 1280 osthread->set_thread_id(-1); | |
| 1281 | |
| 1282 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); | |
| 1283 if (status != 0) { | |
| 1284 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1285 perror("os::create_thread"); | |
| 1286 } | |
| 1287 thread->set_osthread(NULL); | |
| 1288 // Need to clean up stuff we've allocated so far | |
| 1289 delete osthread; | |
| 1290 return false; | |
| 1291 } | |
| 1292 | |
| 1293 Atomic::inc(&os::Solaris::_os_thread_count); | |
| 1294 | |
| 1295 // Store info on the Solaris thread into the OSThread | |
| 1296 osthread->set_thread_id(tid); | |
| 1297 | |
| 1298 // Remember that we created this thread so we can set priority on it | |
| 1299 osthread->set_vm_created(); | |
| 1300 | |
| 1301 // Set the default thread priority otherwise use NormalPriority | |
| 1302 | |
| 1303 if ( UseThreadPriorities ) { | |
| 1304 thr_setprio(tid, (DefaultThreadPriority == -1) ? | |
| 1305 java_to_os_priority[NormPriority] : | |
| 1306 DefaultThreadPriority); | |
| 1307 } | |
| 1308 | |
| 1309 // Initial thread state is INITIALIZED, not SUSPENDED | |
| 1310 osthread->set_state(INITIALIZED); | |
| 1311 | |
| 1312 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain | |
| 1313 return true; | |
| 1314 } | |
| 1315 | |
| 1316 /* defined for >= Solaris 10. This allows builds on earlier versions | |
| 1317 * of Solaris to take advantage of the newly reserved Solaris JVM signals | |
| 1318 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 | |
| 1319 * and -XX:+UseAltSigs does nothing since these should have no conflict | |
| 1320 */ | |
| 1321 #if !defined(SIGJVM1) | |
| 1322 #define SIGJVM1 39 | |
| 1323 #define SIGJVM2 40 | |
| 1324 #endif | |
| 1325 | |
| 1326 debug_only(static bool signal_sets_initialized = false); | |
| 1327 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
| 1328 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; | |
| 1329 int os::Solaris::_SIGasync = ASYNC_SIGNAL; | |
| 1330 | |
| 1331 bool os::Solaris::is_sig_ignored(int sig) { | |
| 1332 struct sigaction oact; | |
| 1333 sigaction(sig, (struct sigaction*)NULL, &oact); | |
| 1334 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
| 1335 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
| 1336 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
| 1337 return true; | |
| 1338 else | |
| 1339 return false; | |
| 1340 } | |
| 1341 | |
| 1342 // Note: SIGRTMIN is a macro that calls sysconf() so it will | |
| 1343 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime | |
| 1344 static bool isJVM1available() { | |
| 1345 return SIGJVM1 < SIGRTMIN; | |
| 1346 } | |
| 1347 | |
| 1348 void os::Solaris::signal_sets_init() { | |
| 1349 // Should also have an assertion stating we are still single-threaded. | |
| 1350 assert(!signal_sets_initialized, "Already initialized"); | |
| 1351 // Fill in signals that are necessarily unblocked for all threads in | |
| 1352 // the VM. Currently, we unblock the following signals: | |
| 1353 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
| 1354 // by -Xrs (=ReduceSignalUsage)); | |
| 1355 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
| 1356 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
| 1357 // the dispositions or masks wrt these signals. | |
| 1358 // Programs embedding the VM that want to use the above signals for their | |
| 1359 // own purposes must, at this time, use the "-Xrs" option to prevent | |
| 1360 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
| 1361 // (See bug 4345157, and other related bugs). | |
| 1362 // In reality, though, unblocking these signals is really a nop, since | |
| 1363 // these signals are not blocked by default. | |
| 1364 sigemptyset(&unblocked_sigs); | |
| 1365 sigemptyset(&allowdebug_blocked_sigs); | |
| 1366 sigaddset(&unblocked_sigs, SIGILL); | |
| 1367 sigaddset(&unblocked_sigs, SIGSEGV); | |
| 1368 sigaddset(&unblocked_sigs, SIGBUS); | |
| 1369 sigaddset(&unblocked_sigs, SIGFPE); | |
| 1370 | |
| 1371 if (isJVM1available) { | |
| 1372 os::Solaris::set_SIGinterrupt(SIGJVM1); | |
| 1373 os::Solaris::set_SIGasync(SIGJVM2); | |
| 1374 } else if (UseAltSigs) { | |
| 1375 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); | |
| 1376 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); | |
| 1377 } else { | |
| 1378 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); | |
| 1379 os::Solaris::set_SIGasync(ASYNC_SIGNAL); | |
| 1380 } | |
| 1381 | |
| 1382 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); | |
| 1383 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); | |
| 1384 | |
| 1385 if (!ReduceSignalUsage) { | |
| 1386 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
| 1387 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
| 1388 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
| 1389 } | |
| 1390 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
| 1391 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
| 1392 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
| 1393 } | |
| 1394 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
| 1395 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
| 1396 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
| 1397 } | |
| 1398 } | |
| 1399 // Fill in signals that are blocked by all but the VM thread. | |
| 1400 sigemptyset(&vm_sigs); | |
| 1401 if (!ReduceSignalUsage) | |
| 1402 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
| 1403 debug_only(signal_sets_initialized = true); | |
| 1404 | |
| 1405 // For diagnostics only used in run_periodic_checks | |
| 1406 sigemptyset(&check_signal_done); | |
| 1407 } | |
| 1408 | |
| 1409 // These are signals that are unblocked while a thread is running Java. | |
| 1410 // (For some reason, they get blocked by default.) | |
| 1411 sigset_t* os::Solaris::unblocked_signals() { | |
| 1412 assert(signal_sets_initialized, "Not initialized"); | |
| 1413 return &unblocked_sigs; | |
| 1414 } | |
| 1415 | |
| 1416 // These are the signals that are blocked while a (non-VM) thread is | |
| 1417 // running Java. Only the VM thread handles these signals. | |
| 1418 sigset_t* os::Solaris::vm_signals() { | |
| 1419 assert(signal_sets_initialized, "Not initialized"); | |
| 1420 return &vm_sigs; | |
| 1421 } | |
| 1422 | |
| 1423 // These are signals that are blocked during cond_wait to allow debugger in | |
| 1424 sigset_t* os::Solaris::allowdebug_blocked_signals() { | |
| 1425 assert(signal_sets_initialized, "Not initialized"); | |
| 1426 return &allowdebug_blocked_sigs; | |
| 1427 } | |
| 1428 | |
| 1429 // First crack at OS-specific initialization, from inside the new thread. | |
| 1430 void os::initialize_thread() { | |
| 1431 int r = thr_main() ; | |
| 1432 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; | |
| 1433 if (r) { | |
| 1434 JavaThread* jt = (JavaThread *)Thread::current(); | |
| 1435 assert(jt != NULL,"Sanity check"); | |
| 1436 size_t stack_size; | |
| 1437 address base = jt->stack_base(); | |
| 1438 if (Arguments::created_by_java_launcher()) { | |
| 1439 // Use 2MB to allow for Solaris 7 64 bit mode. | |
| 1440 stack_size = JavaThread::stack_size_at_create() == 0 | |
| 1441 ? 2048*K : JavaThread::stack_size_at_create(); | |
| 1442 | |
| 1443 // There are rare cases when we may have already used more than | |
| 1444 // the basic stack size allotment before this method is invoked. | |
| 1445 // Attempt to allow for a normally sized java_stack. | |
| 1446 size_t current_stack_offset = (size_t)(base - (address)&stack_size); | |
| 1447 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); | |
| 1448 } else { | |
| 1449 // 6269555: If we were not created by a Java launcher, i.e. if we are | |
| 1450 // running embedded in a native application, treat the primordial thread | |
| 1451 // as much like a native attached thread as possible. This means using | |
| 1452 // the current stack size from thr_stksegment(), unless it is too large | |
| 1453 // to reliably setup guard pages. A reasonable max size is 8MB. | |
| 1454 size_t current_size = current_stack_size(); | |
| 1455 // This should never happen, but just in case.... | |
| 1456 if (current_size == 0) current_size = 2 * K * K; | |
| 1457 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; | |
| 1458 } | |
| 1459 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; | |
| 1460 stack_size = (size_t)(base - bottom); | |
| 1461 | |
| 1462 assert(stack_size > 0, "Stack size calculation problem"); | |
| 1463 | |
| 1464 if (stack_size > jt->stack_size()) { | |
| 1465 NOT_PRODUCT( | |
| 1466 struct rlimit limits; | |
| 1467 getrlimit(RLIMIT_STACK, &limits); | |
| 1468 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); | |
| 1469 assert(size >= jt->stack_size(), "Stack size problem in main thread"); | |
| 1470 ) | |
| 1471 tty->print_cr( | |
| 1472 "Stack size of %d Kb exceeds current limit of %d Kb.\n" | |
| 1473 "(Stack sizes are rounded up to a multiple of the system page size.)\n" | |
| 1474 "See limit(1) to increase the stack size limit.", | |
| 1475 stack_size / K, jt->stack_size() / K); | |
| 1476 vm_exit(1); | |
| 1477 } | |
| 1478 assert(jt->stack_size() >= stack_size, | |
| 1479 "Attempt to map more stack than was allocated"); | |
| 1480 jt->set_stack_size(stack_size); | |
| 1481 } | |
| 1482 | |
| 1483 // 5/22/01: Right now alternate signal stacks do not handle | |
| 1484 // throwing stack overflow exceptions, see bug 4463178 | |
| 1485 // Until a fix is found for this, T2 will NOT imply alternate signal | |
| 1486 // stacks. | |
| 1487 // If using T2 libthread threads, install an alternate signal stack. | |
| 1488 // Because alternate stacks associate with LWPs on Solaris, | |
| 1489 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads | |
| 1490 // we prefer to explicitly stack bang. | |
| 1491 // If not using T2 libthread, but using UseBoundThreads any threads | |
| 1492 // (primordial thread, jni_attachCurrentThread) we do not create, | |
| 1493 // probably are not bound, therefore they can not have an alternate | |
| 1494 // signal stack. Since our stack banging code is generated and | |
| 1495 // is shared across threads, all threads must be bound to allow | |
| 1496 // using alternate signal stacks. The alternative is to interpose | |
| 1497 // on _lwp_create to associate an alt sig stack with each LWP, | |
| 1498 // and this could be a problem when the JVM is embedded. | |
| 1499 // We would prefer to use alternate signal stacks with T2 | |
| 1500 // Since there is currently no accurate way to detect T2 | |
| 1501 // we do not. Assuming T2 when running T1 causes sig 11s or assertions | |
| 1502 // on installing alternate signal stacks | |
| 1503 | |
| 1504 | |
| 1505 // 05/09/03: removed alternate signal stack support for Solaris | |
| 1506 // The alternate signal stack mechanism is no longer needed to | |
| 1507 // handle stack overflow. This is now handled by allocating | |
| 1508 // guard pages (red zone) and stackbanging. | |
| 1509 // Initially the alternate signal stack mechanism was removed because | |
| 1510 // it did not work with T1 llibthread. Alternate | |
| 1511 // signal stacks MUST have all threads bound to lwps. Applications | |
| 1512 // can create their own threads and attach them without their being | |
| 1513 // bound under T1. This is frequently the case for the primordial thread. | |
| 1514 // If we were ever to reenable this mechanism we would need to | |
| 1515 // use the dynamic check for T2 libthread. | |
| 1516 | |
| 1517 os::Solaris::init_thread_fpu_state(); | |
| 1518 } | |
| 1519 | |
| 1520 | |
| 1521 | |
| 1522 // Free Solaris resources related to the OSThread | |
| 1523 void os::free_thread(OSThread* osthread) { | |
| 1524 assert(osthread != NULL, "os::free_thread but osthread not set"); | |
| 1525 | |
| 1526 | |
| 1527 // We are told to free resources of the argument thread, | |
| 1528 // but we can only really operate on the current thread. | |
| 1529 // The main thread must take the VMThread down synchronously | |
| 1530 // before the main thread exits and frees up CodeHeap | |
| 1531 guarantee((Thread::current()->osthread() == osthread | |
| 1532 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); | |
| 1533 if (Thread::current()->osthread() == osthread) { | |
| 1534 // Restore caller's signal mask | |
| 1535 sigset_t sigmask = osthread->caller_sigmask(); | |
| 1536 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); | |
| 1537 } | |
| 1538 delete osthread; | |
| 1539 } | |
| 1540 | |
| 1541 void os::pd_start_thread(Thread* thread) { | |
| 1542 int status = thr_continue(thread->osthread()->thread_id()); | |
| 1543 assert_status(status == 0, status, "thr_continue failed"); | |
| 1544 } | |
| 1545 | |
| 1546 | |
| 1547 intx os::current_thread_id() { | |
| 1548 return (intx)thr_self(); | |
| 1549 } | |
| 1550 | |
| 1551 static pid_t _initial_pid = 0; | |
| 1552 | |
| 1553 int os::current_process_id() { | |
| 1554 return (int)(_initial_pid ? _initial_pid : getpid()); | |
| 1555 } | |
| 1556 | |
| 1557 int os::allocate_thread_local_storage() { | |
| 1558 // %%% in Win32 this allocates a memory segment pointed to by a | |
| 1559 // register. Dan Stein can implement a similar feature in | |
| 1560 // Solaris. Alternatively, the VM can do the same thing | |
| 1561 // explicitly: malloc some storage and keep the pointer in a | |
| 1562 // register (which is part of the thread's context) (or keep it | |
| 1563 // in TLS). | |
| 1564 // %%% In current versions of Solaris, thr_self and TSD can | |
| 1565 // be accessed via short sequences of displaced indirections. | |
| 1566 // The value of thr_self is available as %g7(36). | |
| 1567 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), | |
| 1568 // assuming that the current thread already has a value bound to k. | |
| 1569 // It may be worth experimenting with such access patterns, | |
| 1570 // and later having the parameters formally exported from a Solaris | |
| 1571 // interface. I think, however, that it will be faster to | |
| 1572 // maintain the invariant that %g2 always contains the | |
| 1573 // JavaThread in Java code, and have stubs simply | |
| 1574 // treat %g2 as a caller-save register, preserving it in a %lN. | |
| 1575 thread_key_t tk; | |
| 1576 if (thr_keycreate( &tk, NULL ) ) | |
| 1577 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); | |
| 1578 return int(tk); | |
| 1579 } | |
| 1580 | |
| 1581 void os::free_thread_local_storage(int index) { | |
| 1582 // %%% don't think we need anything here | |
| 1583 // if ( pthread_key_delete((pthread_key_t) tk) ) | |
| 1584 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); | |
| 1585 } | |
| 1586 | |
| 1587 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific | |
| 1588 // small number - point is NO swap space available | |
| 1589 void os::thread_local_storage_at_put(int index, void* value) { | |
| 1590 // %%% this is used only in threadLocalStorage.cpp | |
| 1591 if (thr_setspecific((thread_key_t)index, value)) { | |
| 1592 if (errno == ENOMEM) { | |
| 1593 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); | |
| 1594 } else { | |
| 1595 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); | |
| 1596 } | |
| 1597 } else { | |
| 1598 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; | |
| 1599 } | |
| 1600 } | |
| 1601 | |
| 1602 // This function could be called before TLS is initialized, for example, when | |
| 1603 // VM receives an async signal or when VM causes a fatal error during | |
| 1604 // initialization. Return NULL if thr_getspecific() fails. | |
| 1605 void* os::thread_local_storage_at(int index) { | |
| 1606 // %%% this is used only in threadLocalStorage.cpp | |
| 1607 void* r = NULL; | |
| 1608 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; | |
| 1609 } | |
| 1610 | |
| 1611 | |
| 1612 const int NANOSECS_PER_MILLISECS = 1000000; | |
| 1613 // gethrtime can move backwards if read from one cpu and then a different cpu | |
| 1614 // getTimeNanos is guaranteed to not move backward on Solaris | |
| 1615 // local spinloop created as faster for a CAS on an int than | |
| 1616 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not | |
| 1617 // supported on sparc v8 or pre supports_cx8 intel boxes. | |
| 1618 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong | |
| 1619 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes | |
| 1620 inline hrtime_t oldgetTimeNanos() { | |
| 1621 int gotlock = LOCK_INVALID; | |
| 1622 hrtime_t newtime = gethrtime(); | |
| 1623 | |
| 1624 for (;;) { | |
| 1625 // grab lock for max_hrtime | |
| 1626 int curlock = max_hrtime_lock; | |
| 1627 if (curlock & LOCK_BUSY) continue; | |
| 1628 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; | |
| 1629 if (newtime > max_hrtime) { | |
| 1630 max_hrtime = newtime; | |
| 1631 } else { | |
| 1632 newtime = max_hrtime; | |
| 1633 } | |
| 1634 // release lock | |
| 1635 max_hrtime_lock = LOCK_FREE; | |
| 1636 return newtime; | |
| 1637 } | |
| 1638 } | |
| 1639 // gethrtime can move backwards if read from one cpu and then a different cpu | |
| 1640 // getTimeNanos is guaranteed to not move backward on Solaris | |
| 1641 inline hrtime_t getTimeNanos() { | |
| 1642 if (VM_Version::supports_cx8()) { | |
| 1643 bool retry = false; | |
| 1644 hrtime_t newtime = gethrtime(); | |
| 1645 hrtime_t oldmaxtime = max_hrtime; | |
| 1646 hrtime_t retmaxtime = oldmaxtime; | |
| 1647 while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) { | |
| 1648 oldmaxtime = retmaxtime; | |
| 1649 retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime); | |
| 1650 retry = true; | |
| 1651 } | |
| 1652 return (newtime > retmaxtime) ? newtime : retmaxtime; | |
| 1653 } else { | |
| 1654 return oldgetTimeNanos(); | |
| 1655 } | |
| 1656 } | |
| 1657 | |
| 1658 // Time since start-up in seconds to a fine granularity. | |
| 1659 // Used by VMSelfDestructTimer and the MemProfiler. | |
| 1660 double os::elapsedTime() { | |
| 1661 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; | |
| 1662 } | |
| 1663 | |
| 1664 jlong os::elapsed_counter() { | |
| 1665 return (jlong)(getTimeNanos() - first_hrtime); | |
| 1666 } | |
| 1667 | |
| 1668 jlong os::elapsed_frequency() { | |
| 1669 return hrtime_hz; | |
| 1670 } | |
| 1671 | |
| 1672 // Return the real, user, and system times in seconds from an | |
| 1673 // arbitrary fixed point in the past. | |
| 1674 bool os::getTimesSecs(double* process_real_time, | |
| 1675 double* process_user_time, | |
| 1676 double* process_system_time) { | |
| 1677 struct tms ticks; | |
| 1678 clock_t real_ticks = times(&ticks); | |
| 1679 | |
| 1680 if (real_ticks == (clock_t) (-1)) { | |
| 1681 return false; | |
| 1682 } else { | |
| 1683 double ticks_per_second = (double) clock_tics_per_sec; | |
| 1684 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
| 1685 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
| 1686 // For consistency return the real time from getTimeNanos() | |
| 1687 // converted to seconds. | |
| 1688 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); | |
| 1689 | |
| 1690 return true; | |
| 1691 } | |
| 1692 } | |
| 1693 | |
| 1694 // Used internally for comparisons only | |
| 1695 // getTimeMillis guaranteed to not move backwards on Solaris | |
| 1696 jlong getTimeMillis() { | |
| 1697 jlong nanotime = getTimeNanos(); | |
| 1698 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); | |
| 1699 } | |
| 1700 | |
| 61 | 1701 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis |
| 1702 jlong os::javaTimeMillis() { | |
| 0 | 1703 timeval t; |
| 1704 if (gettimeofday( &t, NULL) == -1) | |
| 61 | 1705 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); |
| 0 | 1706 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; |
| 1707 } | |
| 1708 | |
| 1709 jlong os::javaTimeNanos() { | |
| 1710 return (jlong)getTimeNanos(); | |
| 1711 } | |
| 1712 | |
| 1713 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
| 1714 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits | |
| 1715 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
| 1716 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
| 1717 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
| 1718 } | |
| 1719 | |
| 1720 char * os::local_time_string(char *buf, size_t buflen) { | |
| 1721 struct tm t; | |
| 1722 time_t long_time; | |
| 1723 time(&long_time); | |
| 1724 localtime_r(&long_time, &t); | |
| 1725 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
| 1726 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
| 1727 t.tm_hour, t.tm_min, t.tm_sec); | |
| 1728 return buf; | |
| 1729 } | |
| 1730 | |
| 1731 // Note: os::shutdown() might be called very early during initialization, or | |
| 1732 // called from signal handler. Before adding something to os::shutdown(), make | |
| 1733 // sure it is async-safe and can handle partially initialized VM. | |
| 1734 void os::shutdown() { | |
| 1735 | |
| 1736 // allow PerfMemory to attempt cleanup of any persistent resources | |
| 1737 perfMemory_exit(); | |
| 1738 | |
| 1739 // needs to remove object in file system | |
| 1740 AttachListener::abort(); | |
| 1741 | |
| 1742 // flush buffered output, finish log files | |
| 1743 ostream_abort(); | |
| 1744 | |
| 1745 // Check for abort hook | |
| 1746 abort_hook_t abort_hook = Arguments::abort_hook(); | |
| 1747 if (abort_hook != NULL) { | |
| 1748 abort_hook(); | |
| 1749 } | |
| 1750 } | |
| 1751 | |
| 1752 // Note: os::abort() might be called very early during initialization, or | |
| 1753 // called from signal handler. Before adding something to os::abort(), make | |
| 1754 // sure it is async-safe and can handle partially initialized VM. | |
| 1755 void os::abort(bool dump_core) { | |
| 1756 os::shutdown(); | |
| 1757 if (dump_core) { | |
| 1758 #ifndef PRODUCT | |
| 1759 fdStream out(defaultStream::output_fd()); | |
| 1760 out.print_raw("Current thread is "); | |
| 1761 char buf[16]; | |
| 1762 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
| 1763 out.print_raw_cr(buf); | |
| 1764 out.print_raw_cr("Dumping core ..."); | |
| 1765 #endif | |
| 1766 ::abort(); // dump core (for debugging) | |
| 1767 } | |
| 1768 | |
| 1769 ::exit(1); | |
| 1770 } | |
| 1771 | |
| 1772 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 1773 void os::die() { | |
| 1774 _exit(-1); | |
| 1775 } | |
| 1776 | |
| 1777 // unused | |
| 1778 void os::set_error_file(const char *logfile) {} | |
| 1779 | |
| 1780 // DLL functions | |
| 1781 | |
| 1782 const char* os::dll_file_extension() { return ".so"; } | |
| 1783 | |
| 1784 const char* os::get_temp_directory() { return "/tmp/"; } | |
| 1785 | |
| 1786 const char* os::get_current_directory(char *buf, int buflen) { | |
| 1787 return getcwd(buf, buflen); | |
| 1788 } | |
| 1789 | |
| 1790 // check if addr is inside libjvm[_g].so | |
| 1791 bool os::address_is_in_vm(address addr) { | |
| 1792 static address libjvm_base_addr; | |
| 1793 Dl_info dlinfo; | |
| 1794 | |
| 1795 if (libjvm_base_addr == NULL) { | |
| 1796 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); | |
| 1797 libjvm_base_addr = (address)dlinfo.dli_fbase; | |
| 1798 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); | |
| 1799 } | |
| 1800 | |
| 1801 if (dladdr((void *)addr, &dlinfo)) { | |
| 1802 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; | |
| 1803 } | |
| 1804 | |
| 1805 return false; | |
| 1806 } | |
| 1807 | |
| 1808 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); | |
| 1809 static dladdr1_func_type dladdr1_func = NULL; | |
| 1810 | |
| 1811 bool os::dll_address_to_function_name(address addr, char *buf, | |
| 1812 int buflen, int * offset) { | |
| 1813 Dl_info dlinfo; | |
| 1814 | |
| 1815 // dladdr1_func was initialized in os::init() | |
| 1816 if (dladdr1_func){ | |
| 1817 // yes, we have dladdr1 | |
| 1818 | |
| 1819 // Support for dladdr1 is checked at runtime; it may be | |
| 1820 // available even if the vm is built on a machine that does | |
| 1821 // not have dladdr1 support. Make sure there is a value for | |
| 1822 // RTLD_DL_SYMENT. | |
| 1823 #ifndef RTLD_DL_SYMENT | |
| 1824 #define RTLD_DL_SYMENT 1 | |
| 1825 #endif | |
| 1826 Sym * info; | |
| 1827 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, | |
| 1828 RTLD_DL_SYMENT)) { | |
| 1829 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); | |
| 1830 if (offset) *offset = addr - (address)dlinfo.dli_saddr; | |
| 1831 | |
| 1832 // check if the returned symbol really covers addr | |
| 1833 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); | |
| 1834 } else { | |
| 1835 if (buf) buf[0] = '\0'; | |
| 1836 if (offset) *offset = -1; | |
| 1837 return false; | |
| 1838 } | |
| 1839 } else { | |
| 1840 // no, only dladdr is available | |
| 1841 if(dladdr((void *)addr, &dlinfo)) { | |
| 1842 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); | |
| 1843 if (offset) *offset = addr - (address)dlinfo.dli_saddr; | |
| 1844 return true; | |
| 1845 } else { | |
| 1846 if (buf) buf[0] = '\0'; | |
| 1847 if (offset) *offset = -1; | |
| 1848 return false; | |
| 1849 } | |
| 1850 } | |
| 1851 } | |
| 1852 | |
| 1853 bool os::dll_address_to_library_name(address addr, char* buf, | |
| 1854 int buflen, int* offset) { | |
| 1855 Dl_info dlinfo; | |
| 1856 | |
| 1857 if (dladdr((void*)addr, &dlinfo)){ | |
| 1858 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); | |
| 1859 if (offset) *offset = addr - (address)dlinfo.dli_fbase; | |
| 1860 return true; | |
| 1861 } else { | |
| 1862 if (buf) buf[0] = '\0'; | |
| 1863 if (offset) *offset = -1; | |
| 1864 return false; | |
| 1865 } | |
| 1866 } | |
| 1867 | |
| 1868 // Prints the names and full paths of all opened dynamic libraries | |
| 1869 // for current process | |
| 1870 void os::print_dll_info(outputStream * st) { | |
| 1871 Dl_info dli; | |
| 1872 void *handle; | |
| 1873 Link_map *map; | |
| 1874 Link_map *p; | |
| 1875 | |
| 1876 st->print_cr("Dynamic libraries:"); st->flush(); | |
| 1877 | |
| 1878 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { | |
| 1879 st->print_cr("Error: Cannot print dynamic libraries."); | |
| 1880 return; | |
| 1881 } | |
| 1882 handle = dlopen(dli.dli_fname, RTLD_LAZY); | |
| 1883 if (handle == NULL) { | |
| 1884 st->print_cr("Error: Cannot print dynamic libraries."); | |
| 1885 return; | |
| 1886 } | |
| 1887 dlinfo(handle, RTLD_DI_LINKMAP, &map); | |
| 1888 if (map == NULL) { | |
| 1889 st->print_cr("Error: Cannot print dynamic libraries."); | |
| 1890 return; | |
| 1891 } | |
| 1892 | |
| 1893 while (map->l_prev != NULL) | |
| 1894 map = map->l_prev; | |
| 1895 | |
| 1896 while (map != NULL) { | |
| 1897 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); | |
| 1898 map = map->l_next; | |
| 1899 } | |
| 1900 | |
| 1901 dlclose(handle); | |
| 1902 } | |
| 1903 | |
| 1904 // Loads .dll/.so and | |
| 1905 // in case of error it checks if .dll/.so was built for the | |
| 1906 // same architecture as Hotspot is running on | |
| 1907 | |
| 1908 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) | |
| 1909 { | |
| 1910 void * result= ::dlopen(filename, RTLD_LAZY); | |
| 1911 if (result != NULL) { | |
| 1912 // Successful loading | |
| 1913 return result; | |
| 1914 } | |
| 1915 | |
| 1916 Elf32_Ehdr elf_head; | |
| 1917 | |
| 1918 // Read system error message into ebuf | |
| 1919 // It may or may not be overwritten below | |
| 1920 ::strncpy(ebuf, ::dlerror(), ebuflen-1); | |
| 1921 ebuf[ebuflen-1]='\0'; | |
| 1922 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
| 1923 char* diag_msg_buf=ebuf+strlen(ebuf); | |
| 1924 | |
| 1925 if (diag_msg_max_length==0) { | |
| 1926 // No more space in ebuf for additional diagnostics message | |
| 1927 return NULL; | |
| 1928 } | |
| 1929 | |
| 1930 | |
| 1931 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
| 1932 | |
| 1933 if (file_descriptor < 0) { | |
| 1934 // Can't open library, report dlerror() message | |
| 1935 return NULL; | |
| 1936 } | |
| 1937 | |
| 1938 bool failed_to_read_elf_head= | |
| 1939 (sizeof(elf_head)!= | |
| 1940 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
| 1941 | |
| 1942 ::close(file_descriptor); | |
| 1943 if (failed_to_read_elf_head) { | |
| 1944 // file i/o error - report dlerror() msg | |
| 1945 return NULL; | |
| 1946 } | |
| 1947 | |
| 1948 typedef struct { | |
| 1949 Elf32_Half code; // Actual value as defined in elf.h | |
| 1950 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
| 1951 char elf_class; // 32 or 64 bit | |
| 1952 char endianess; // MSB or LSB | |
| 1953 char* name; // String representation | |
| 1954 } arch_t; | |
| 1955 | |
| 1956 static const arch_t arch_array[]={ | |
| 1957 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1958 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1959 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
| 1960 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
| 1961 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1962 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1963 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
| 1964 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
| 1965 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} | |
| 1966 }; | |
| 1967 | |
| 1968 #if (defined IA32) | |
| 1969 static Elf32_Half running_arch_code=EM_386; | |
| 1970 #elif (defined AMD64) | |
| 1971 static Elf32_Half running_arch_code=EM_X86_64; | |
| 1972 #elif (defined IA64) | |
| 1973 static Elf32_Half running_arch_code=EM_IA_64; | |
| 1974 #elif (defined __sparc) && (defined _LP64) | |
| 1975 static Elf32_Half running_arch_code=EM_SPARCV9; | |
| 1976 #elif (defined __sparc) && (!defined _LP64) | |
| 1977 static Elf32_Half running_arch_code=EM_SPARC; | |
| 1978 #elif (defined __powerpc64__) | |
| 1979 static Elf32_Half running_arch_code=EM_PPC64; | |
| 1980 #elif (defined __powerpc__) | |
| 1981 static Elf32_Half running_arch_code=EM_PPC; | |
| 1982 #else | |
| 1983 #error Method os::dll_load requires that one of following is defined:\ | |
| 1984 IA32, AMD64, IA64, __sparc, __powerpc__ | |
| 1985 #endif | |
| 1986 | |
| 1987 // Identify compatability class for VM's architecture and library's architecture | |
| 1988 // Obtain string descriptions for architectures | |
| 1989 | |
| 1990 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
| 1991 int running_arch_index=-1; | |
| 1992 | |
| 1993 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
| 1994 if (running_arch_code == arch_array[i].code) { | |
| 1995 running_arch_index = i; | |
| 1996 } | |
| 1997 if (lib_arch.code == arch_array[i].code) { | |
| 1998 lib_arch.compat_class = arch_array[i].compat_class; | |
| 1999 lib_arch.name = arch_array[i].name; | |
| 2000 } | |
| 2001 } | |
| 2002 | |
| 2003 assert(running_arch_index != -1, | |
| 2004 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
| 2005 if (running_arch_index == -1) { | |
| 2006 // Even though running architecture detection failed | |
| 2007 // we may still continue with reporting dlerror() message | |
| 2008 return NULL; | |
| 2009 } | |
| 2010 | |
| 2011 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
| 2012 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
| 2013 return NULL; | |
| 2014 } | |
| 2015 | |
| 2016 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { | |
| 2017 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
| 2018 return NULL; | |
| 2019 } | |
| 2020 | |
| 2021 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
| 2022 if ( lib_arch.name!=NULL ) { | |
| 2023 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2024 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
| 2025 lib_arch.name, arch_array[running_arch_index].name); | |
| 2026 } else { | |
| 2027 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2028 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
| 2029 lib_arch.code, | |
| 2030 arch_array[running_arch_index].name); | |
| 2031 } | |
| 2032 } | |
| 2033 | |
| 2034 return NULL; | |
| 2035 } | |
| 2036 | |
| 2037 | |
| 2038 | |
| 2039 bool _print_ascii_file(const char* filename, outputStream* st) { | |
| 2040 int fd = open(filename, O_RDONLY); | |
| 2041 if (fd == -1) { | |
| 2042 return false; | |
| 2043 } | |
| 2044 | |
| 2045 char buf[32]; | |
| 2046 int bytes; | |
| 2047 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { | |
| 2048 st->print_raw(buf, bytes); | |
| 2049 } | |
| 2050 | |
| 2051 close(fd); | |
| 2052 | |
| 2053 return true; | |
| 2054 } | |
| 2055 | |
| 2056 void os::print_os_info(outputStream* st) { | |
| 2057 st->print("OS:"); | |
| 2058 | |
| 2059 if (!_print_ascii_file("/etc/release", st)) { | |
| 2060 st->print("Solaris"); | |
| 2061 } | |
| 2062 st->cr(); | |
| 2063 | |
| 2064 // kernel | |
| 2065 st->print("uname:"); | |
| 2066 struct utsname name; | |
| 2067 uname(&name); | |
| 2068 st->print(name.sysname); st->print(" "); | |
| 2069 st->print(name.release); st->print(" "); | |
| 2070 st->print(name.version); st->print(" "); | |
| 2071 st->print(name.machine); | |
| 2072 | |
| 2073 // libthread | |
| 2074 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); | |
| 2075 else st->print(" (T1 libthread)"); | |
| 2076 st->cr(); | |
| 2077 | |
| 2078 // rlimit | |
| 2079 st->print("rlimit:"); | |
| 2080 struct rlimit rlim; | |
| 2081 | |
| 2082 st->print(" STACK "); | |
| 2083 getrlimit(RLIMIT_STACK, &rlim); | |
| 2084 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2085 else st->print("%uk", rlim.rlim_cur >> 10); | |
| 2086 | |
| 2087 st->print(", CORE "); | |
| 2088 getrlimit(RLIMIT_CORE, &rlim); | |
| 2089 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2090 else st->print("%uk", rlim.rlim_cur >> 10); | |
| 2091 | |
| 2092 st->print(", NOFILE "); | |
| 2093 getrlimit(RLIMIT_NOFILE, &rlim); | |
| 2094 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2095 else st->print("%d", rlim.rlim_cur); | |
| 2096 | |
| 2097 st->print(", AS "); | |
| 2098 getrlimit(RLIMIT_AS, &rlim); | |
| 2099 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2100 else st->print("%uk", rlim.rlim_cur >> 10); | |
| 2101 st->cr(); | |
| 2102 | |
| 2103 // load average | |
| 2104 st->print("load average:"); | |
| 2105 double loadavg[3]; | |
| 2106 os::loadavg(loadavg, 3); | |
| 2107 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); | |
| 2108 st->cr(); | |
| 2109 } | |
| 2110 | |
| 2111 | |
| 2112 static bool check_addr0(outputStream* st) { | |
| 2113 jboolean status = false; | |
| 2114 int fd = open("/proc/self/map",O_RDONLY); | |
| 2115 if (fd >= 0) { | |
| 2116 prmap_t p; | |
| 2117 while(read(fd, &p, sizeof(p)) > 0) { | |
| 2118 if (p.pr_vaddr == 0x0) { | |
| 2119 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); | |
| 2120 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); | |
| 2121 st->print("Access:"); | |
| 2122 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); | |
| 2123 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); | |
| 2124 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); | |
| 2125 st->cr(); | |
| 2126 status = true; | |
| 2127 } | |
| 2128 close(fd); | |
| 2129 } | |
| 2130 } | |
| 2131 return status; | |
| 2132 } | |
| 2133 | |
| 2134 void os::print_memory_info(outputStream* st) { | |
| 2135 st->print("Memory:"); | |
| 2136 st->print(" %dk page", os::vm_page_size()>>10); | |
| 2137 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); | |
| 2138 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); | |
| 2139 st->cr(); | |
| 2140 (void) check_addr0(st); | |
| 2141 } | |
| 2142 | |
| 2143 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific | |
| 2144 // but they're the same for all the solaris architectures that we support. | |
| 2145 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", | |
| 2146 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", | |
| 2147 "ILL_COPROC", "ILL_BADSTK" }; | |
| 2148 | |
| 2149 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", | |
| 2150 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", | |
| 2151 "FPE_FLTINV", "FPE_FLTSUB" }; | |
| 2152 | |
| 2153 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; | |
| 2154 | |
| 2155 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; | |
| 2156 | |
| 2157 void os::print_siginfo(outputStream* st, void* siginfo) { | |
| 2158 st->print("siginfo:"); | |
| 2159 | |
| 2160 const int buflen = 100; | |
| 2161 char buf[buflen]; | |
| 2162 siginfo_t *si = (siginfo_t*)siginfo; | |
| 2163 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); | |
| 2164 char *err = strerror(si->si_errno); | |
| 2165 if (si->si_errno != 0 && err != NULL) { | |
| 2166 st->print("si_errno=%s", err); | |
| 2167 } else { | |
| 2168 st->print("si_errno=%d", si->si_errno); | |
| 2169 } | |
| 2170 const int c = si->si_code; | |
| 2171 assert(c > 0, "unexpected si_code"); | |
| 2172 switch (si->si_signo) { | |
| 2173 case SIGILL: | |
| 2174 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); | |
| 2175 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2176 break; | |
| 2177 case SIGFPE: | |
| 2178 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); | |
| 2179 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2180 break; | |
| 2181 case SIGSEGV: | |
| 2182 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); | |
| 2183 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2184 break; | |
| 2185 case SIGBUS: | |
| 2186 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); | |
| 2187 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2188 break; | |
| 2189 default: | |
| 2190 st->print(", si_code=%d", si->si_code); | |
| 2191 // no si_addr | |
| 2192 } | |
| 2193 | |
| 2194 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && | |
| 2195 UseSharedSpaces) { | |
| 2196 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
| 2197 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
| 2198 st->print("\n\nError accessing class data sharing archive." \ | |
| 2199 " Mapped file inaccessible during execution, " \ | |
| 2200 " possible disk/network problem."); | |
| 2201 } | |
| 2202 } | |
| 2203 st->cr(); | |
| 2204 } | |
| 2205 | |
| 2206 // Moved from whole group, because we need them here for diagnostic | |
| 2207 // prints. | |
| 2208 #define OLDMAXSIGNUM 32 | |
| 2209 static int Maxsignum = 0; | |
| 2210 static int *ourSigFlags = NULL; | |
| 2211 | |
| 2212 extern "C" void sigINTRHandler(int, siginfo_t*, void*); | |
| 2213 | |
| 2214 int os::Solaris::get_our_sigflags(int sig) { | |
| 2215 assert(ourSigFlags!=NULL, "signal data structure not initialized"); | |
| 2216 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); | |
| 2217 return ourSigFlags[sig]; | |
| 2218 } | |
| 2219 | |
| 2220 void os::Solaris::set_our_sigflags(int sig, int flags) { | |
| 2221 assert(ourSigFlags!=NULL, "signal data structure not initialized"); | |
| 2222 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); | |
| 2223 ourSigFlags[sig] = flags; | |
| 2224 } | |
| 2225 | |
| 2226 | |
| 2227 static const char* get_signal_handler_name(address handler, | |
| 2228 char* buf, int buflen) { | |
| 2229 int offset; | |
| 2230 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); | |
| 2231 if (found) { | |
| 2232 // skip directory names | |
| 2233 const char *p1, *p2; | |
| 2234 p1 = buf; | |
| 2235 size_t len = strlen(os::file_separator()); | |
| 2236 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
| 2237 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
| 2238 } else { | |
| 2239 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
| 2240 } | |
| 2241 return buf; | |
| 2242 } | |
| 2243 | |
| 2244 static void print_signal_handler(outputStream* st, int sig, | |
| 2245 char* buf, size_t buflen) { | |
| 2246 struct sigaction sa; | |
| 2247 | |
| 2248 sigaction(sig, NULL, &sa); | |
| 2249 | |
| 2250 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
| 2251 | |
| 2252 address handler = (sa.sa_flags & SA_SIGINFO) | |
| 2253 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
| 2254 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
| 2255 | |
| 2256 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
| 2257 st->print("SIG_DFL"); | |
| 2258 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
| 2259 st->print("SIG_IGN"); | |
| 2260 } else { | |
| 2261 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
| 2262 } | |
| 2263 | |
| 2264 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); | |
| 2265 | |
| 2266 address rh = VMError::get_resetted_sighandler(sig); | |
| 2267 // May be, handler was resetted by VMError? | |
| 2268 if(rh != NULL) { | |
| 2269 handler = rh; | |
| 2270 sa.sa_flags = VMError::get_resetted_sigflags(sig); | |
| 2271 } | |
| 2272 | |
| 2273 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); | |
| 2274 | |
| 2275 // Check: is it our handler? | |
| 2276 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || | |
| 2277 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { | |
| 2278 // It is our signal handler | |
| 2279 // check for flags | |
| 2280 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { | |
| 2281 st->print( | |
| 2282 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
| 2283 os::Solaris::get_our_sigflags(sig)); | |
| 2284 } | |
| 2285 } | |
| 2286 st->cr(); | |
| 2287 } | |
| 2288 | |
| 2289 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
| 2290 st->print_cr("Signal Handlers:"); | |
| 2291 print_signal_handler(st, SIGSEGV, buf, buflen); | |
| 2292 print_signal_handler(st, SIGBUS , buf, buflen); | |
| 2293 print_signal_handler(st, SIGFPE , buf, buflen); | |
| 2294 print_signal_handler(st, SIGPIPE, buf, buflen); | |
| 2295 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
| 2296 print_signal_handler(st, SIGILL , buf, buflen); | |
| 2297 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
| 2298 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); | |
| 2299 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
| 2300 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); | |
| 2301 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
| 2302 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); | |
| 2303 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); | |
| 2304 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); | |
| 2305 } | |
| 2306 | |
| 2307 static char saved_jvm_path[MAXPATHLEN] = { 0 }; | |
| 2308 | |
| 2309 // Find the full path to the current module, libjvm.so or libjvm_g.so | |
| 2310 void os::jvm_path(char *buf, jint buflen) { | |
| 2311 // Error checking. | |
| 2312 if (buflen < MAXPATHLEN) { | |
| 2313 assert(false, "must use a large-enough buffer"); | |
| 2314 buf[0] = '\0'; | |
| 2315 return; | |
| 2316 } | |
| 2317 // Lazy resolve the path to current module. | |
| 2318 if (saved_jvm_path[0] != 0) { | |
| 2319 strcpy(buf, saved_jvm_path); | |
| 2320 return; | |
| 2321 } | |
| 2322 | |
| 2323 Dl_info dlinfo; | |
| 2324 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); | |
| 2325 assert(ret != 0, "cannot locate libjvm"); | |
| 2326 realpath((char *)dlinfo.dli_fname, buf); | |
| 2327 | |
| 2328 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { | |
| 2329 // Support for the gamma launcher. Typical value for buf is | |
| 2330 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
| 2331 // the right place in the string, then assume we are installed in a JDK and | |
| 2332 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
| 2333 // up the path so it looks like libjvm.so is installed there (append a | |
| 2334 // fake suffix hotspot/libjvm.so). | |
| 2335 const char *p = buf + strlen(buf) - 1; | |
| 2336 for (int count = 0; p > buf && count < 5; ++count) { | |
| 2337 for (--p; p > buf && *p != '/'; --p) | |
| 2338 /* empty */ ; | |
| 2339 } | |
| 2340 | |
| 2341 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
| 2342 // Look for JAVA_HOME in the environment. | |
| 2343 char* java_home_var = ::getenv("JAVA_HOME"); | |
| 2344 if (java_home_var != NULL && java_home_var[0] != 0) { | |
| 2345 char cpu_arch[12]; | |
| 2346 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); | |
| 2347 #ifdef _LP64 | |
| 2348 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. | |
| 2349 if (strcmp(cpu_arch, "sparc") == 0) { | |
| 2350 strcat(cpu_arch, "v9"); | |
| 2351 } else if (strcmp(cpu_arch, "i386") == 0) { | |
| 2352 strcpy(cpu_arch, "amd64"); | |
| 2353 } | |
| 2354 #endif | |
| 2355 // Check the current module name "libjvm.so" or "libjvm_g.so". | |
| 2356 p = strrchr(buf, '/'); | |
| 2357 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
| 2358 p = strstr(p, "_g") ? "_g" : ""; | |
| 2359 | |
| 2360 realpath(java_home_var, buf); | |
| 2361 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); | |
| 2362 if (0 == access(buf, F_OK)) { | |
| 2363 // Use current module name "libjvm[_g].so" instead of | |
| 2364 // "libjvm"debug_only("_g")".so" since for fastdebug version | |
| 2365 // we should have "libjvm.so" but debug_only("_g") adds "_g"! | |
| 2366 // It is used when we are choosing the HPI library's name | |
| 2367 // "libhpi[_g].so" in hpi::initialize_get_interface(). | |
| 2368 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); | |
| 2369 } else { | |
| 2370 // Go back to path of .so | |
| 2371 realpath((char *)dlinfo.dli_fname, buf); | |
| 2372 } | |
| 2373 } | |
| 2374 } | |
| 2375 } | |
| 2376 | |
| 2377 strcpy(saved_jvm_path, buf); | |
| 2378 } | |
| 2379 | |
| 2380 | |
| 2381 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
| 2382 // no prefix required, not even "_" | |
| 2383 } | |
| 2384 | |
| 2385 | |
| 2386 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
| 2387 // no suffix required | |
| 2388 } | |
| 2389 | |
| 2390 | |
| 2391 // sun.misc.Signal | |
| 2392 | |
| 2393 extern "C" { | |
| 2394 static void UserHandler(int sig, void *siginfo, void *context) { | |
| 2395 // Ctrl-C is pressed during error reporting, likely because the error | |
| 2396 // handler fails to abort. Let VM die immediately. | |
| 2397 if (sig == SIGINT && is_error_reported()) { | |
| 2398 os::die(); | |
| 2399 } | |
| 2400 | |
| 2401 os::signal_notify(sig); | |
| 2402 // We do not need to reinstate the signal handler each time... | |
| 2403 } | |
| 2404 } | |
| 2405 | |
| 2406 void* os::user_handler() { | |
| 2407 return CAST_FROM_FN_PTR(void*, UserHandler); | |
| 2408 } | |
| 2409 | |
| 2410 extern "C" { | |
| 2411 typedef void (*sa_handler_t)(int); | |
| 2412 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
| 2413 } | |
| 2414 | |
| 2415 void* os::signal(int signal_number, void* handler) { | |
| 2416 struct sigaction sigAct, oldSigAct; | |
| 2417 sigfillset(&(sigAct.sa_mask)); | |
| 2418 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; | |
| 2419 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
| 2420 | |
| 2421 if (sigaction(signal_number, &sigAct, &oldSigAct)) | |
| 2422 // -1 means registration failed | |
| 2423 return (void *)-1; | |
| 2424 | |
| 2425 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
| 2426 } | |
| 2427 | |
| 2428 void os::signal_raise(int signal_number) { | |
| 2429 raise(signal_number); | |
| 2430 } | |
| 2431 | |
| 2432 /* | |
| 2433 * The following code is moved from os.cpp for making this | |
| 2434 * code platform specific, which it is by its very nature. | |
| 2435 */ | |
| 2436 | |
| 2437 // a counter for each possible signal value | |
| 2438 static int Sigexit = 0; | |
| 2439 static int Maxlibjsigsigs; | |
| 2440 static jint *pending_signals = NULL; | |
| 2441 static int *preinstalled_sigs = NULL; | |
| 2442 static struct sigaction *chainedsigactions = NULL; | |
| 2443 static sema_t sig_sem; | |
| 2444 typedef int (*version_getting_t)(); | |
| 2445 version_getting_t os::Solaris::get_libjsig_version = NULL; | |
| 2446 static int libjsigversion = NULL; | |
| 2447 | |
| 2448 int os::sigexitnum_pd() { | |
| 2449 assert(Sigexit > 0, "signal memory not yet initialized"); | |
| 2450 return Sigexit; | |
| 2451 } | |
| 2452 | |
| 2453 void os::Solaris::init_signal_mem() { | |
| 2454 // Initialize signal structures | |
| 2455 Maxsignum = SIGRTMAX; | |
| 2456 Sigexit = Maxsignum+1; | |
| 2457 assert(Maxsignum >0, "Unable to obtain max signal number"); | |
| 2458 | |
| 2459 Maxlibjsigsigs = Maxsignum; | |
| 2460 | |
| 2461 // pending_signals has one int per signal | |
| 2462 // The additional signal is for SIGEXIT - exit signal to signal_thread | |
| 2463 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); | |
| 2464 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); | |
| 2465 | |
| 2466 if (UseSignalChaining) { | |
| 2467 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) | |
| 2468 * (Maxsignum + 1)); | |
| 2469 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); | |
| 2470 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); | |
| 2471 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); | |
| 2472 } | |
| 2473 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); | |
| 2474 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); | |
| 2475 } | |
| 2476 | |
| 2477 void os::signal_init_pd() { | |
| 2478 int ret; | |
| 2479 | |
| 2480 ret = ::sema_init(&sig_sem, 0, NULL, NULL); | |
| 2481 assert(ret == 0, "sema_init() failed"); | |
| 2482 } | |
| 2483 | |
| 2484 void os::signal_notify(int signal_number) { | |
| 2485 int ret; | |
| 2486 | |
| 2487 Atomic::inc(&pending_signals[signal_number]); | |
| 2488 ret = ::sema_post(&sig_sem); | |
| 2489 assert(ret == 0, "sema_post() failed"); | |
| 2490 } | |
| 2491 | |
| 2492 static int check_pending_signals(bool wait_for_signal) { | |
| 2493 int ret; | |
| 2494 while (true) { | |
| 2495 for (int i = 0; i < Sigexit + 1; i++) { | |
| 2496 jint n = pending_signals[i]; | |
| 2497 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
| 2498 return i; | |
| 2499 } | |
| 2500 } | |
| 2501 if (!wait_for_signal) { | |
| 2502 return -1; | |
| 2503 } | |
| 2504 JavaThread *thread = JavaThread::current(); | |
| 2505 ThreadBlockInVM tbivm(thread); | |
| 2506 | |
| 2507 bool threadIsSuspended; | |
| 2508 do { | |
| 2509 thread->set_suspend_equivalent(); | |
| 2510 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 2511 while((ret = ::sema_wait(&sig_sem)) == EINTR) | |
| 2512 ; | |
| 2513 assert(ret == 0, "sema_wait() failed"); | |
| 2514 | |
| 2515 // were we externally suspended while we were waiting? | |
| 2516 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
| 2517 if (threadIsSuspended) { | |
| 2518 // | |
| 2519 // The semaphore has been incremented, but while we were waiting | |
| 2520 // another thread suspended us. We don't want to continue running | |
| 2521 // while suspended because that would surprise the thread that | |
| 2522 // suspended us. | |
| 2523 // | |
| 2524 ret = ::sema_post(&sig_sem); | |
| 2525 assert(ret == 0, "sema_post() failed"); | |
| 2526 | |
| 2527 thread->java_suspend_self(); | |
| 2528 } | |
| 2529 } while (threadIsSuspended); | |
| 2530 } | |
| 2531 } | |
| 2532 | |
| 2533 int os::signal_lookup() { | |
| 2534 return check_pending_signals(false); | |
| 2535 } | |
| 2536 | |
| 2537 int os::signal_wait() { | |
| 2538 return check_pending_signals(true); | |
| 2539 } | |
| 2540 | |
| 2541 //////////////////////////////////////////////////////////////////////////////// | |
| 2542 // Virtual Memory | |
| 2543 | |
| 2544 static int page_size = -1; | |
| 2545 | |
| 2546 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will | |
| 2547 // clear this var if support is not available. | |
| 2548 static bool has_map_align = true; | |
| 2549 | |
| 2550 int os::vm_page_size() { | |
| 2551 assert(page_size != -1, "must call os::init"); | |
| 2552 return page_size; | |
| 2553 } | |
| 2554 | |
| 2555 // Solaris allocates memory by pages. | |
| 2556 int os::vm_allocation_granularity() { | |
| 2557 assert(page_size != -1, "must call os::init"); | |
| 2558 return page_size; | |
| 2559 } | |
| 2560 | |
| 2561 bool os::commit_memory(char* addr, size_t bytes) { | |
| 2562 size_t size = bytes; | |
| 2563 return | |
| 2564 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, | |
| 2565 PROT_READ | PROT_WRITE | PROT_EXEC); | |
| 2566 } | |
| 2567 | |
| 2568 bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { | |
| 2569 if (commit_memory(addr, bytes)) { | |
| 2570 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { | |
| 2571 // If the large page size has been set and the VM | |
| 2572 // is using large pages, use the large page size | |
| 2573 // if it is smaller than the alignment hint. This is | |
| 2574 // a case where the VM wants to use a larger alignment size | |
| 2575 // for its own reasons but still want to use large pages | |
| 2576 // (which is what matters to setting the mpss range. | |
| 2577 size_t page_size = 0; | |
| 2578 if (large_page_size() < alignment_hint) { | |
| 2579 assert(UseLargePages, "Expected to be here for large page use only"); | |
| 2580 page_size = large_page_size(); | |
| 2581 } else { | |
| 2582 // If the alignment hint is less than the large page | |
| 2583 // size, the VM wants a particular alignment (thus the hint) | |
| 2584 // for internal reasons. Try to set the mpss range using | |
| 2585 // the alignment_hint. | |
| 2586 page_size = alignment_hint; | |
| 2587 } | |
| 2588 // Since this is a hint, ignore any failures. | |
| 2589 (void)Solaris::set_mpss_range(addr, bytes, page_size); | |
| 2590 } | |
| 2591 return true; | |
| 2592 } | |
| 2593 return false; | |
| 2594 } | |
| 2595 | |
| 2596 // Uncommit the pages in a specified region. | |
| 2597 void os::free_memory(char* addr, size_t bytes) { | |
| 2598 if (madvise(addr, bytes, MADV_FREE) < 0) { | |
| 2599 debug_only(warning("MADV_FREE failed.")); | |
| 2600 return; | |
| 2601 } | |
| 2602 } | |
| 2603 | |
| 2604 // Change the page size in a given range. | |
| 2605 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
| 2606 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); | |
| 2607 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); | |
| 2608 Solaris::set_mpss_range(addr, bytes, alignment_hint); | |
| 2609 } | |
| 2610 | |
| 2611 // Tell the OS to make the range local to the first-touching LWP | |
| 141 | 2612 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
| 0 | 2613 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); |
| 2614 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { | |
| 2615 debug_only(warning("MADV_ACCESS_LWP failed.")); | |
| 2616 } | |
| 2617 } | |
| 2618 | |
| 2619 // Tell the OS that this range would be accessed from different LWPs. | |
| 2620 void os::numa_make_global(char *addr, size_t bytes) { | |
| 2621 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); | |
| 2622 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { | |
| 2623 debug_only(warning("MADV_ACCESS_MANY failed.")); | |
| 2624 } | |
| 2625 } | |
| 2626 | |
| 2627 // Get the number of the locality groups. | |
| 2628 size_t os::numa_get_groups_num() { | |
| 2629 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); | |
| 2630 return n != -1 ? n : 1; | |
| 2631 } | |
| 2632 | |
| 2633 // Get a list of leaf locality groups. A leaf lgroup is group that | |
| 2634 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory | |
| 2635 // board. An LWP is assigned to one of these groups upon creation. | |
| 2636 size_t os::numa_get_leaf_groups(int *ids, size_t size) { | |
| 2637 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { | |
| 2638 ids[0] = 0; | |
| 2639 return 1; | |
| 2640 } | |
| 2641 int result_size = 0, top = 1, bottom = 0, cur = 0; | |
| 2642 for (int k = 0; k < size; k++) { | |
| 2643 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], | |
| 2644 (Solaris::lgrp_id_t*)&ids[top], size - top); | |
| 2645 if (r == -1) { | |
| 2646 ids[0] = 0; | |
| 2647 return 1; | |
| 2648 } | |
| 2649 if (!r) { | |
|
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2650 // That's a leaf node. |
| 0 | 2651 assert (bottom <= cur, "Sanity check"); |
|
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2652 // Check if the node has memory |
|
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2653 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], |
|
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2654 NULL, 0, LGRP_RSRC_MEM) > 0) { |
|
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2655 ids[bottom++] = ids[cur]; |
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2656 } |
| 0 | 2657 } |
| 2658 top += r; | |
| 2659 cur++; | |
| 2660 } | |
| 2661 return bottom; | |
| 2662 } | |
| 2663 | |
| 2664 // Detect the topology change. Typically happens during CPU pluggin-unplugging. | |
| 2665 bool os::numa_topology_changed() { | |
| 2666 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); | |
| 2667 if (is_stale != -1 && is_stale) { | |
| 2668 Solaris::lgrp_fini(Solaris::lgrp_cookie()); | |
| 2669 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); | |
| 2670 assert(c != 0, "Failure to initialize LGRP API"); | |
| 2671 Solaris::set_lgrp_cookie(c); | |
| 2672 return true; | |
| 2673 } | |
| 2674 return false; | |
| 2675 } | |
| 2676 | |
| 2677 // Get the group id of the current LWP. | |
| 2678 int os::numa_get_group_id() { | |
|
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2679 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); |
| 0 | 2680 if (lgrp_id == -1) { |
| 2681 return 0; | |
| 2682 } | |
|
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2683 const int size = os::numa_get_groups_num(); |
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2684 int *ids = (int*)alloca(size * sizeof(int)); |
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2685 |
|
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2686 // Get the ids of all lgroups with memory; r is the count. |
|
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2687 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, |
|
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2688 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); |
|
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2689 if (r <= 0) { |
|
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2690 return 0; |
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2691 } |
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2692 return ids[os::random() % r]; |
| 0 | 2693 } |
| 2694 | |
| 2695 // Request information about the page. | |
| 2696 bool os::get_page_info(char *start, page_info* info) { | |
| 2697 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; | |
| 2698 uint64_t addr = (uintptr_t)start; | |
| 2699 uint64_t outdata[2]; | |
| 2700 uint_t validity = 0; | |
| 2701 | |
| 2702 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { | |
| 2703 return false; | |
| 2704 } | |
| 2705 | |
| 2706 info->size = 0; | |
| 2707 info->lgrp_id = -1; | |
| 2708 | |
| 2709 if ((validity & 1) != 0) { | |
| 2710 if ((validity & 2) != 0) { | |
| 2711 info->lgrp_id = outdata[0]; | |
| 2712 } | |
| 2713 if ((validity & 4) != 0) { | |
| 2714 info->size = outdata[1]; | |
| 2715 } | |
| 2716 return true; | |
| 2717 } | |
| 2718 return false; | |
| 2719 } | |
| 2720 | |
| 2721 // Scan the pages from start to end until a page different than | |
| 2722 // the one described in the info parameter is encountered. | |
| 2723 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
| 2724 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; | |
| 2725 const size_t types = sizeof(info_types) / sizeof(info_types[0]); | |
| 2726 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; | |
| 2727 uint_t validity[MAX_MEMINFO_CNT]; | |
| 2728 | |
| 2729 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); | |
| 2730 uint64_t p = (uint64_t)start; | |
| 2731 while (p < (uint64_t)end) { | |
| 2732 addrs[0] = p; | |
| 2733 size_t addrs_count = 1; | |
| 2734 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { | |
| 2735 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; | |
| 2736 addrs_count++; | |
| 2737 } | |
| 2738 | |
| 2739 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { | |
| 2740 return NULL; | |
| 2741 } | |
| 2742 | |
| 2743 size_t i = 0; | |
| 2744 for (; i < addrs_count; i++) { | |
| 2745 if ((validity[i] & 1) != 0) { | |
| 2746 if ((validity[i] & 4) != 0) { | |
| 2747 if (outdata[types * i + 1] != page_expected->size) { | |
| 2748 break; | |
| 2749 } | |
| 2750 } else | |
| 2751 if (page_expected->size != 0) { | |
| 2752 break; | |
| 2753 } | |
| 2754 | |
| 2755 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { | |
| 2756 if (outdata[types * i] != page_expected->lgrp_id) { | |
| 2757 break; | |
| 2758 } | |
| 2759 } | |
| 2760 } else { | |
| 2761 return NULL; | |
| 2762 } | |
| 2763 } | |
| 2764 | |
| 2765 if (i != addrs_count) { | |
| 2766 if ((validity[i] & 2) != 0) { | |
| 2767 page_found->lgrp_id = outdata[types * i]; | |
| 2768 } else { | |
| 2769 page_found->lgrp_id = -1; | |
| 2770 } | |
| 2771 if ((validity[i] & 4) != 0) { | |
| 2772 page_found->size = outdata[types * i + 1]; | |
| 2773 } else { | |
| 2774 page_found->size = 0; | |
| 2775 } | |
| 2776 return (char*)addrs[i]; | |
| 2777 } | |
| 2778 | |
| 2779 p = addrs[addrs_count - 1] + page_size; | |
| 2780 } | |
| 2781 return end; | |
| 2782 } | |
| 2783 | |
| 2784 bool os::uncommit_memory(char* addr, size_t bytes) { | |
| 2785 size_t size = bytes; | |
| 2786 // Map uncommitted pages PROT_NONE so we fail early if we touch an | |
| 2787 // uncommitted page. Otherwise, the read/write might succeed if we | |
| 2788 // have enough swap space to back the physical page. | |
| 2789 return | |
| 2790 NULL != Solaris::mmap_chunk(addr, size, | |
| 2791 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, | |
| 2792 PROT_NONE); | |
| 2793 } | |
| 2794 | |
| 2795 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { | |
| 2796 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); | |
| 2797 | |
| 2798 if (b == MAP_FAILED) { | |
| 2799 return NULL; | |
| 2800 } | |
| 2801 return b; | |
| 2802 } | |
| 2803 | |
|
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2804 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { |
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2805 char* addr = requested_addr; |
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2806 int flags = MAP_PRIVATE | MAP_NORESERVE; |
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2807 |
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2808 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); |
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2809 |
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2810 if (fixed) { |
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2811 flags |= MAP_FIXED; |
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2812 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { |
| 0 | 2813 flags |= MAP_ALIGN; |
| 2814 addr = (char*) alignment_hint; | |
| 2815 } | |
| 2816 | |
| 2817 // Map uncommitted pages PROT_NONE so we fail early if we touch an | |
| 2818 // uncommitted page. Otherwise, the read/write might succeed if we | |
| 2819 // have enough swap space to back the physical page. | |
|
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2820 return mmap_chunk(addr, bytes, flags, PROT_NONE); |
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2821 } |
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2822 |
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2823 char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { |
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2824 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); |
| 0 | 2825 |
| 2826 guarantee(requested_addr == NULL || requested_addr == addr, | |
| 2827 "OS failed to return requested mmap address."); | |
| 2828 return addr; | |
| 2829 } | |
| 2830 | |
| 2831 // Reserve memory at an arbitrary address, only if that area is | |
| 2832 // available (and not reserved for something else). | |
| 2833 | |
| 2834 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { | |
| 2835 const int max_tries = 10; | |
| 2836 char* base[max_tries]; | |
| 2837 size_t size[max_tries]; | |
| 2838 | |
| 2839 // Solaris adds a gap between mmap'ed regions. The size of the gap | |
| 2840 // is dependent on the requested size and the MMU. Our initial gap | |
| 2841 // value here is just a guess and will be corrected later. | |
| 2842 bool had_top_overlap = false; | |
| 2843 bool have_adjusted_gap = false; | |
| 2844 size_t gap = 0x400000; | |
| 2845 | |
| 2846 // Assert only that the size is a multiple of the page size, since | |
| 2847 // that's all that mmap requires, and since that's all we really know | |
| 2848 // about at this low abstraction level. If we need higher alignment, | |
| 2849 // we can either pass an alignment to this method or verify alignment | |
| 2850 // in one of the methods further up the call chain. See bug 5044738. | |
| 2851 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
| 2852 | |
|
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2853 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. |
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2854 // Give it a try, if the kernel honors the hint we can return immediately. |
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2855 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); |
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2856 volatile int err = errno; |
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2857 if (addr == requested_addr) { |
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2858 return addr; |
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2859 } else if (addr != NULL) { |
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2860 unmap_memory(addr, bytes); |
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2861 } |
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2862 |
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2863 if (PrintMiscellaneous && Verbose) { |
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2864 char buf[256]; |
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2865 buf[0] = '\0'; |
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2866 if (addr == NULL) { |
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2867 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); |
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2868 } |
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2869 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " |
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2870 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT |
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2871 "%s", bytes, requested_addr, addr, buf); |
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2872 } |
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2873 |
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2874 // Address hint method didn't work. Fall back to the old method. |
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2875 // In theory, once SNV becomes our oldest supported platform, this |
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2876 // code will no longer be needed. |
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2877 // |
| 0 | 2878 // Repeatedly allocate blocks until the block is allocated at the |
| 2879 // right spot. Give up after max_tries. | |
| 2880 int i; | |
| 2881 for (i = 0; i < max_tries; ++i) { | |
| 2882 base[i] = reserve_memory(bytes); | |
| 2883 | |
| 2884 if (base[i] != NULL) { | |
| 2885 // Is this the block we wanted? | |
| 2886 if (base[i] == requested_addr) { | |
| 2887 size[i] = bytes; | |
| 2888 break; | |
| 2889 } | |
| 2890 | |
| 2891 // check that the gap value is right | |
| 2892 if (had_top_overlap && !have_adjusted_gap) { | |
| 2893 size_t actual_gap = base[i-1] - base[i] - bytes; | |
| 2894 if (gap != actual_gap) { | |
| 2895 // adjust the gap value and retry the last 2 allocations | |
| 2896 assert(i > 0, "gap adjustment code problem"); | |
| 2897 have_adjusted_gap = true; // adjust the gap only once, just in case | |
| 2898 gap = actual_gap; | |
| 2899 if (PrintMiscellaneous && Verbose) { | |
| 2900 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); | |
| 2901 } | |
| 2902 unmap_memory(base[i], bytes); | |
| 2903 unmap_memory(base[i-1], size[i-1]); | |
| 2904 i-=2; | |
| 2905 continue; | |
| 2906 } | |
| 2907 } | |
| 2908 | |
| 2909 // Does this overlap the block we wanted? Give back the overlapped | |
| 2910 // parts and try again. | |
| 2911 // | |
| 2912 // There is still a bug in this code: if top_overlap == bytes, | |
| 2913 // the overlap is offset from requested region by the value of gap. | |
| 2914 // In this case giving back the overlapped part will not work, | |
| 2915 // because we'll give back the entire block at base[i] and | |
| 2916 // therefore the subsequent allocation will not generate a new gap. | |
| 2917 // This could be fixed with a new algorithm that used larger | |
| 2918 // or variable size chunks to find the requested region - | |
| 2919 // but such a change would introduce additional complications. | |
| 2920 // It's rare enough that the planets align for this bug, | |
| 2921 // so we'll just wait for a fix for 6204603/5003415 which | |
| 2922 // will provide a mmap flag to allow us to avoid this business. | |
| 2923 | |
| 2924 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
| 2925 if (top_overlap >= 0 && top_overlap < bytes) { | |
| 2926 had_top_overlap = true; | |
| 2927 unmap_memory(base[i], top_overlap); | |
| 2928 base[i] += top_overlap; | |
| 2929 size[i] = bytes - top_overlap; | |
| 2930 } else { | |
| 2931 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
| 2932 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
| 2933 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { | |
| 2934 warning("attempt_reserve_memory_at: possible alignment bug"); | |
| 2935 } | |
| 2936 unmap_memory(requested_addr, bottom_overlap); | |
| 2937 size[i] = bytes - bottom_overlap; | |
| 2938 } else { | |
| 2939 size[i] = bytes; | |
| 2940 } | |
| 2941 } | |
| 2942 } | |
| 2943 } | |
| 2944 | |
| 2945 // Give back the unused reserved pieces. | |
| 2946 | |
| 2947 for (int j = 0; j < i; ++j) { | |
| 2948 if (base[j] != NULL) { | |
| 2949 unmap_memory(base[j], size[j]); | |
| 2950 } | |
| 2951 } | |
| 2952 | |
| 2953 return (i < max_tries) ? requested_addr : NULL; | |
| 2954 } | |
| 2955 | |
| 2956 bool os::release_memory(char* addr, size_t bytes) { | |
| 2957 size_t size = bytes; | |
| 2958 return munmap(addr, size) == 0; | |
| 2959 } | |
| 2960 | |
| 2961 static bool solaris_mprotect(char* addr, size_t bytes, int prot) { | |
| 2962 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), | |
| 2963 "addr must be page aligned"); | |
| 2964 int retVal = mprotect(addr, bytes, prot); | |
| 2965 return retVal == 0; | |
| 2966 } | |
| 2967 | |
| 2968 // Protect memory (make it read-only. (Used to pass readonly pages through | |
| 2969 // JNI GetArray<type>Elements with empty arrays.) | |
| 2970 bool os::protect_memory(char* addr, size_t bytes) { | |
| 2971 return solaris_mprotect(addr, bytes, PROT_READ); | |
| 2972 } | |
| 2973 | |
| 2974 // guard_memory and unguard_memory only happens within stack guard pages. | |
| 2975 // Since ISM pertains only to the heap, guard and unguard memory should not | |
| 2976 /// happen with an ISM region. | |
| 2977 bool os::guard_memory(char* addr, size_t bytes) { | |
| 2978 return solaris_mprotect(addr, bytes, PROT_NONE); | |
| 2979 } | |
| 2980 | |
| 2981 bool os::unguard_memory(char* addr, size_t bytes) { | |
| 2982 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC); | |
| 2983 } | |
| 2984 | |
| 2985 // Large page support | |
| 2986 | |
| 2987 // UseLargePages is the master flag to enable/disable large page memory. | |
| 2988 // UseMPSS and UseISM are supported for compatibility reasons. Their combined | |
| 2989 // effects can be described in the following table: | |
| 2990 // | |
| 2991 // UseLargePages UseMPSS UseISM | |
| 2992 // false * * => UseLargePages is the master switch, turning | |
| 2993 // it off will turn off both UseMPSS and | |
| 2994 // UseISM. VM will not use large page memory | |
| 2995 // regardless the settings of UseMPSS/UseISM. | |
| 2996 // true false false => Unless future Solaris provides other | |
| 2997 // mechanism to use large page memory, this | |
| 2998 // combination is equivalent to -UseLargePages, | |
| 2999 // VM will not use large page memory | |
| 3000 // true true false => JVM will use MPSS for large page memory. | |
| 3001 // This is the default behavior. | |
| 3002 // true false true => JVM will use ISM for large page memory. | |
| 3003 // true true true => JVM will use ISM if it is available. | |
| 3004 // Otherwise, JVM will fall back to MPSS. | |
| 3005 // Becaues ISM is now available on all | |
| 3006 // supported Solaris versions, this combination | |
| 3007 // is equivalent to +UseISM -UseMPSS. | |
| 3008 | |
| 3009 typedef int (*getpagesizes_func_type) (size_t[], int); | |
| 3010 static size_t _large_page_size = 0; | |
| 3011 | |
| 3012 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { | |
| 3013 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address | |
| 3014 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc | |
| 3015 // can support multiple page sizes. | |
| 3016 | |
| 3017 // Don't bother to probe page size because getpagesizes() comes with MPSS. | |
| 3018 // ISM is only recommended on old Solaris where there is no MPSS support. | |
| 3019 // Simply choose a conservative value as default. | |
| 3020 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : | |
| 3021 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); | |
| 3022 | |
| 3023 // ISM is available on all supported Solaris versions | |
| 3024 return true; | |
| 3025 } | |
| 3026 | |
| 3027 // Insertion sort for small arrays (descending order). | |
| 3028 static void insertion_sort_descending(size_t* array, int len) { | |
| 3029 for (int i = 0; i < len; i++) { | |
| 3030 size_t val = array[i]; | |
| 3031 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { | |
| 3032 size_t tmp = array[key]; | |
| 3033 array[key] = array[key - 1]; | |
| 3034 array[key - 1] = tmp; | |
| 3035 } | |
| 3036 } | |
| 3037 } | |
| 3038 | |
| 3039 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { | |
| 3040 getpagesizes_func_type getpagesizes_func = | |
| 3041 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); | |
| 3042 if (getpagesizes_func == NULL) { | |
| 3043 if (warn) { | |
| 3044 warning("MPSS is not supported by the operating system."); | |
| 3045 } | |
| 3046 return false; | |
| 3047 } | |
| 3048 | |
| 3049 const unsigned int usable_count = VM_Version::page_size_count(); | |
| 3050 if (usable_count == 1) { | |
| 3051 return false; | |
| 3052 } | |
| 3053 | |
| 3054 // Fill the array of page sizes. | |
| 3055 int n = getpagesizes_func(_page_sizes, page_sizes_max); | |
| 3056 assert(n > 0, "Solaris bug?"); | |
| 3057 if (n == page_sizes_max) { | |
| 3058 // Add a sentinel value (necessary only if the array was completely filled | |
| 3059 // since it is static (zeroed at initialization)). | |
| 3060 _page_sizes[--n] = 0; | |
| 3061 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) | |
| 3062 } | |
| 3063 assert(_page_sizes[n] == 0, "missing sentinel"); | |
| 3064 | |
| 3065 if (n == 1) return false; // Only one page size available. | |
| 3066 | |
| 3067 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and | |
| 3068 // select up to usable_count elements. First sort the array, find the first | |
| 3069 // acceptable value, then copy the usable sizes to the top of the array and | |
| 3070 // trim the rest. Make sure to include the default page size :-). | |
| 3071 // | |
| 3072 // A better policy could get rid of the 4M limit by taking the sizes of the | |
| 3073 // important VM memory regions (java heap and possibly the code cache) into | |
| 3074 // account. | |
| 3075 insertion_sort_descending(_page_sizes, n); | |
| 3076 const size_t size_limit = | |
| 3077 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; | |
| 3078 int beg; | |
| 3079 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; | |
| 3080 const int end = MIN2((int)usable_count, n) - 1; | |
| 3081 for (int cur = 0; cur < end; ++cur, ++beg) { | |
| 3082 _page_sizes[cur] = _page_sizes[beg]; | |
| 3083 } | |
| 3084 _page_sizes[end] = vm_page_size(); | |
| 3085 _page_sizes[end + 1] = 0; | |
| 3086 | |
| 3087 if (_page_sizes[end] > _page_sizes[end - 1]) { | |
| 3088 // Default page size is not the smallest; sort again. | |
| 3089 insertion_sort_descending(_page_sizes, end + 1); | |
| 3090 } | |
| 3091 *page_size = _page_sizes[0]; | |
| 3092 | |
| 3093 return true; | |
| 3094 } | |
| 3095 | |
| 3096 bool os::large_page_init() { | |
| 3097 if (!UseLargePages) { | |
| 3098 UseISM = false; | |
| 3099 UseMPSS = false; | |
| 3100 return false; | |
| 3101 } | |
| 3102 | |
| 3103 // print a warning if any large page related flag is specified on command line | |
| 3104 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || | |
| 3105 !FLAG_IS_DEFAULT(UseISM) || | |
| 3106 !FLAG_IS_DEFAULT(UseMPSS) || | |
| 3107 !FLAG_IS_DEFAULT(LargePageSizeInBytes); | |
| 3108 UseISM = UseISM && | |
| 3109 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); | |
| 3110 if (UseISM) { | |
| 3111 // ISM disables MPSS to be compatible with old JDK behavior | |
| 3112 UseMPSS = false; | |
|
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3113 _page_sizes[0] = _large_page_size; |
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3114 _page_sizes[1] = vm_page_size(); |
| 0 | 3115 } |
| 3116 | |
| 3117 UseMPSS = UseMPSS && | |
| 3118 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); | |
| 3119 | |
| 3120 UseLargePages = UseISM || UseMPSS; | |
| 3121 return UseLargePages; | |
| 3122 } | |
| 3123 | |
| 3124 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { | |
| 3125 // Signal to OS that we want large pages for addresses | |
| 3126 // from addr, addr + bytes | |
| 3127 struct memcntl_mha mpss_struct; | |
| 3128 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; | |
| 3129 mpss_struct.mha_pagesize = align; | |
| 3130 mpss_struct.mha_flags = 0; | |
| 3131 if (memcntl(start, bytes, MC_HAT_ADVISE, | |
| 3132 (caddr_t) &mpss_struct, 0, 0) < 0) { | |
| 3133 debug_only(warning("Attempt to use MPSS failed.")); | |
| 3134 return false; | |
| 3135 } | |
| 3136 return true; | |
| 3137 } | |
| 3138 | |
| 3139 char* os::reserve_memory_special(size_t bytes) { | |
| 3140 assert(UseLargePages && UseISM, "only for ISM large pages"); | |
| 3141 | |
| 3142 size_t size = bytes; | |
| 3143 char* retAddr = NULL; | |
| 3144 int shmid; | |
| 3145 key_t ismKey; | |
| 3146 | |
| 3147 bool warn_on_failure = UseISM && | |
| 3148 (!FLAG_IS_DEFAULT(UseLargePages) || | |
| 3149 !FLAG_IS_DEFAULT(UseISM) || | |
| 3150 !FLAG_IS_DEFAULT(LargePageSizeInBytes) | |
| 3151 ); | |
| 3152 char msg[128]; | |
| 3153 | |
| 3154 ismKey = IPC_PRIVATE; | |
| 3155 | |
| 3156 // Create a large shared memory region to attach to based on size. | |
| 3157 // Currently, size is the total size of the heap | |
| 3158 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); | |
| 3159 if (shmid == -1){ | |
| 3160 if (warn_on_failure) { | |
| 3161 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); | |
| 3162 warning(msg); | |
| 3163 } | |
| 3164 return NULL; | |
| 3165 } | |
| 3166 | |
| 3167 // Attach to the region | |
| 3168 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); | |
| 3169 int err = errno; | |
| 3170 | |
| 3171 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
| 3172 // will be deleted when it's detached by shmdt() or when the process | |
| 3173 // terminates. If shmat() is not successful this will remove the shared | |
| 3174 // segment immediately. | |
| 3175 shmctl(shmid, IPC_RMID, NULL); | |
| 3176 | |
| 3177 if (retAddr == (char *) -1) { | |
| 3178 if (warn_on_failure) { | |
| 3179 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); | |
| 3180 warning(msg); | |
| 3181 } | |
| 3182 return NULL; | |
| 3183 } | |
| 3184 | |
| 3185 return retAddr; | |
| 3186 } | |
| 3187 | |
| 3188 bool os::release_memory_special(char* base, size_t bytes) { | |
| 3189 // detaching the SHM segment will also delete it, see reserve_memory_special() | |
| 3190 int rslt = shmdt(base); | |
| 3191 return rslt == 0; | |
| 3192 } | |
| 3193 | |
| 3194 size_t os::large_page_size() { | |
| 3195 return _large_page_size; | |
| 3196 } | |
| 3197 | |
| 3198 // MPSS allows application to commit large page memory on demand; with ISM | |
| 3199 // the entire memory region must be allocated as shared memory. | |
| 3200 bool os::can_commit_large_page_memory() { | |
| 3201 return UseISM ? false : true; | |
| 3202 } | |
| 3203 | |
|
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3204 bool os::can_execute_large_page_memory() { |
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3205 return UseISM ? false : true; |
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3206 } |
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3207 |
| 0 | 3208 static int os_sleep(jlong millis, bool interruptible) { |
| 3209 const jlong limit = INT_MAX; | |
| 3210 jlong prevtime; | |
| 3211 int res; | |
| 3212 | |
| 3213 while (millis > limit) { | |
| 3214 if ((res = os_sleep(limit, interruptible)) != OS_OK) | |
| 3215 return res; | |
| 3216 millis -= limit; | |
| 3217 } | |
| 3218 | |
| 3219 // Restart interrupted polls with new parameters until the proper delay | |
| 3220 // has been completed. | |
| 3221 | |
| 3222 prevtime = getTimeMillis(); | |
| 3223 | |
| 3224 while (millis > 0) { | |
| 3225 jlong newtime; | |
| 3226 | |
| 3227 if (!interruptible) { | |
| 3228 // Following assert fails for os::yield_all: | |
| 3229 // assert(!thread->is_Java_thread(), "must not be java thread"); | |
| 3230 res = poll(NULL, 0, millis); | |
| 3231 } else { | |
| 3232 JavaThread *jt = JavaThread::current(); | |
| 3233 | |
| 3234 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, | |
| 3235 os::Solaris::clear_interrupted); | |
| 3236 } | |
| 3237 | |
| 3238 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for | |
| 3239 // thread.Interrupt. | |
| 3240 | |
| 3241 if((res == OS_ERR) && (errno == EINTR)) { | |
| 3242 newtime = getTimeMillis(); | |
| 3243 assert(newtime >= prevtime, "time moving backwards"); | |
| 3244 /* Doing prevtime and newtime in microseconds doesn't help precision, | |
| 3245 and trying to round up to avoid lost milliseconds can result in a | |
| 3246 too-short delay. */ | |
| 3247 millis -= newtime - prevtime; | |
| 3248 if(millis <= 0) | |
| 3249 return OS_OK; | |
| 3250 prevtime = newtime; | |
| 3251 } else | |
| 3252 return res; | |
| 3253 } | |
| 3254 | |
| 3255 return OS_OK; | |
| 3256 } | |
| 3257 | |
| 3258 // Read calls from inside the vm need to perform state transitions | |
| 3259 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
| 3260 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); | |
| 3261 } | |
| 3262 | |
| 3263 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
| 3264 assert(thread == Thread::current(), "thread consistency check"); | |
| 3265 | |
| 3266 // TODO-FIXME: this should be removed. | |
| 3267 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock | |
| 3268 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate | |
| 3269 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving | |
| 3270 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel | |
| 3271 // is fooled into believing that the system is making progress. In the code below we block the | |
| 3272 // the watcher thread while safepoint is in progress so that it would not appear as though the | |
| 3273 // system is making progress. | |
| 3274 if (!Solaris::T2_libthread() && | |
| 3275 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { | |
| 3276 // We now try to acquire the threads lock. Since this lock is held by the VM thread during | |
| 3277 // the entire safepoint, the watcher thread will line up here during the safepoint. | |
| 3278 Threads_lock->lock_without_safepoint_check(); | |
| 3279 Threads_lock->unlock(); | |
| 3280 } | |
| 3281 | |
| 3282 if (thread->is_Java_thread()) { | |
| 3283 // This is a JavaThread so we honor the _thread_blocked protocol | |
| 3284 // even for sleeps of 0 milliseconds. This was originally done | |
| 3285 // as a workaround for bug 4338139. However, now we also do it | |
| 3286 // to honor the suspend-equivalent protocol. | |
| 3287 | |
| 3288 JavaThread *jt = (JavaThread *) thread; | |
| 3289 ThreadBlockInVM tbivm(jt); | |
| 3290 | |
| 3291 jt->set_suspend_equivalent(); | |
| 3292 // cleared by handle_special_suspend_equivalent_condition() or | |
| 3293 // java_suspend_self() via check_and_wait_while_suspended() | |
| 3294 | |
| 3295 int ret_code; | |
| 3296 if (millis <= 0) { | |
| 3297 thr_yield(); | |
| 3298 ret_code = 0; | |
| 3299 } else { | |
| 3300 // The original sleep() implementation did not create an | |
| 3301 // OSThreadWaitState helper for sleeps of 0 milliseconds. | |
| 3302 // I'm preserving that decision for now. | |
| 3303 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
| 3304 | |
| 3305 ret_code = os_sleep(millis, interruptible); | |
| 3306 } | |
| 3307 | |
| 3308 // were we externally suspended while we were waiting? | |
| 3309 jt->check_and_wait_while_suspended(); | |
| 3310 | |
| 3311 return ret_code; | |
| 3312 } | |
| 3313 | |
| 3314 // non-JavaThread from this point on: | |
| 3315 | |
| 3316 if (millis <= 0) { | |
| 3317 thr_yield(); | |
| 3318 return 0; | |
| 3319 } | |
| 3320 | |
| 3321 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 3322 | |
| 3323 return os_sleep(millis, interruptible); | |
| 3324 } | |
| 3325 | |
| 3326 int os::naked_sleep() { | |
| 3327 // %% make the sleep time an integer flag. for now use 1 millisec. | |
| 3328 return os_sleep(1, false); | |
| 3329 } | |
| 3330 | |
| 3331 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
| 3332 void os::infinite_sleep() { | |
| 3333 while (true) { // sleep forever ... | |
| 3334 ::sleep(100); // ... 100 seconds at a time | |
| 3335 } | |
| 3336 } | |
| 3337 | |
| 3338 // Used to convert frequent JVM_Yield() to nops | |
| 3339 bool os::dont_yield() { | |
| 3340 if (DontYieldALot) { | |
| 3341 static hrtime_t last_time = 0; | |
| 3342 hrtime_t diff = getTimeNanos() - last_time; | |
| 3343 | |
| 3344 if (diff < DontYieldALotInterval * 1000000) | |
| 3345 return true; | |
| 3346 | |
| 3347 last_time += diff; | |
| 3348 | |
| 3349 return false; | |
| 3350 } | |
| 3351 else { | |
| 3352 return false; | |
| 3353 } | |
| 3354 } | |
| 3355 | |
| 3356 // Caveat: Solaris os::yield() causes a thread-state transition whereas | |
| 3357 // the linux and win32 implementations do not. This should be checked. | |
| 3358 | |
| 3359 void os::yield() { | |
| 3360 // Yields to all threads with same or greater priority | |
| 3361 os::sleep(Thread::current(), 0, false); | |
| 3362 } | |
| 3363 | |
| 3364 // Note that yield semantics are defined by the scheduling class to which | |
| 3365 // the thread currently belongs. Typically, yield will _not yield to | |
| 3366 // other equal or higher priority threads that reside on the dispatch queues | |
| 3367 // of other CPUs. | |
| 3368 | |
| 3369 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } | |
| 3370 | |
| 3371 | |
| 3372 // On Solaris we found that yield_all doesn't always yield to all other threads. | |
| 3373 // There have been cases where there is a thread ready to execute but it doesn't | |
| 3374 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. | |
| 3375 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a | |
| 3376 // SIGWAITING signal which will cause a new lwp to be created. So we count the | |
| 3377 // number of times yield_all is called in the one loop and increase the sleep | |
| 3378 // time after 8 attempts. If this fails too we increase the concurrency level | |
| 3379 // so that the starving thread would get an lwp | |
| 3380 | |
| 3381 void os::yield_all(int attempts) { | |
| 3382 // Yields to all threads, including threads with lower priorities | |
| 3383 if (attempts == 0) { | |
| 3384 os::sleep(Thread::current(), 1, false); | |
| 3385 } else { | |
| 3386 int iterations = attempts % 30; | |
| 3387 if (iterations == 0 && !os::Solaris::T2_libthread()) { | |
| 3388 // thr_setconcurrency and _getconcurrency make sense only under T1. | |
| 3389 int noofLWPS = thr_getconcurrency(); | |
| 3390 if (noofLWPS < (Threads::number_of_threads() + 2)) { | |
| 3391 thr_setconcurrency(thr_getconcurrency() + 1); | |
| 3392 } | |
| 3393 } else if (iterations < 25) { | |
| 3394 os::sleep(Thread::current(), 1, false); | |
| 3395 } else { | |
| 3396 os::sleep(Thread::current(), 10, false); | |
| 3397 } | |
| 3398 } | |
| 3399 } | |
| 3400 | |
| 3401 // Called from the tight loops to possibly influence time-sharing heuristics | |
| 3402 void os::loop_breaker(int attempts) { | |
| 3403 os::yield_all(attempts); | |
| 3404 } | |
| 3405 | |
| 3406 | |
| 3407 // Interface for setting lwp priorities. If we are using T2 libthread, | |
| 3408 // which forces the use of BoundThreads or we manually set UseBoundThreads, | |
| 3409 // all of our threads will be assigned to real lwp's. Using the thr_setprio | |
| 3410 // function is meaningless in this mode so we must adjust the real lwp's priority | |
| 3411 // The routines below implement the getting and setting of lwp priorities. | |
| 3412 // | |
| 3413 // Note: There are three priority scales used on Solaris. Java priotities | |
| 3414 // which range from 1 to 10, libthread "thr_setprio" scale which range | |
| 3415 // from 0 to 127, and the current scheduling class of the process we | |
| 3416 // are running in. This is typically from -60 to +60. | |
| 3417 // The setting of the lwp priorities in done after a call to thr_setprio | |
| 3418 // so Java priorities are mapped to libthread priorities and we map from | |
| 3419 // the latter to lwp priorities. We don't keep priorities stored in | |
| 3420 // Java priorities since some of our worker threads want to set priorities | |
| 3421 // higher than all Java threads. | |
| 3422 // | |
| 3423 // For related information: | |
| 3424 // (1) man -s 2 priocntl | |
| 3425 // (2) man -s 4 priocntl | |
| 3426 // (3) man dispadmin | |
| 3427 // = librt.so | |
| 3428 // = libthread/common/rtsched.c - thrp_setlwpprio(). | |
| 3429 // = ps -cL <pid> ... to validate priority. | |
| 3430 // = sched_get_priority_min and _max | |
| 3431 // pthread_create | |
| 3432 // sched_setparam | |
| 3433 // pthread_setschedparam | |
| 3434 // | |
| 3435 // Assumptions: | |
| 3436 // + We assume that all threads in the process belong to the same | |
| 3437 // scheduling class. IE. an homogenous process. | |
| 3438 // + Must be root or in IA group to change change "interactive" attribute. | |
| 3439 // Priocntl() will fail silently. The only indication of failure is when | |
| 3440 // we read-back the value and notice that it hasn't changed. | |
| 3441 // + Interactive threads enter the runq at the head, non-interactive at the tail. | |
| 3442 // + For RT, change timeslice as well. Invariant: | |
| 3443 // constant "priority integral" | |
| 3444 // Konst == TimeSlice * (60-Priority) | |
| 3445 // Given a priority, compute appropriate timeslice. | |
| 3446 // + Higher numerical values have higher priority. | |
| 3447 | |
| 3448 // sched class attributes | |
| 3449 typedef struct { | |
| 3450 int schedPolicy; // classID | |
| 3451 int maxPrio; | |
| 3452 int minPrio; | |
| 3453 } SchedInfo; | |
| 3454 | |
| 3455 | |
| 3456 static SchedInfo tsLimits, iaLimits, rtLimits; | |
| 3457 | |
| 3458 #ifdef ASSERT | |
| 3459 static int ReadBackValidate = 1; | |
| 3460 #endif | |
| 3461 static int myClass = 0; | |
| 3462 static int myMin = 0; | |
| 3463 static int myMax = 0; | |
| 3464 static int myCur = 0; | |
| 3465 static bool priocntl_enable = false; | |
| 3466 | |
| 3467 | |
| 3468 // Call the version of priocntl suitable for all supported versions | |
| 3469 // of Solaris. We need to call through this wrapper so that we can | |
| 3470 // build on Solaris 9 and run on Solaris 8, 9 and 10. | |
| 3471 // | |
| 3472 // This code should be removed if we ever stop supporting Solaris 8 | |
| 3473 // and earlier releases. | |
| 3474 | |
| 3475 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); | |
| 3476 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); | |
| 3477 static priocntl_type priocntl_ptr = priocntl_stub; | |
| 3478 | |
| 3479 // Stub to set the value of the real pointer, and then call the real | |
| 3480 // function. | |
| 3481 | |
| 3482 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { | |
| 3483 // Try Solaris 8- name only. | |
| 3484 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); | |
| 3485 guarantee(tmp != NULL, "priocntl function not found."); | |
| 3486 priocntl_ptr = tmp; | |
| 3487 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); | |
| 3488 } | |
| 3489 | |
| 3490 | |
| 3491 // lwp_priocntl_init | |
| 3492 // | |
| 3493 // Try to determine the priority scale for our process. | |
| 3494 // | |
| 3495 // Return errno or 0 if OK. | |
| 3496 // | |
| 3497 static | |
| 3498 int lwp_priocntl_init () | |
| 3499 { | |
| 3500 int rslt; | |
| 3501 pcinfo_t ClassInfo; | |
| 3502 pcparms_t ParmInfo; | |
| 3503 int i; | |
| 3504 | |
| 3505 if (!UseThreadPriorities) return 0; | |
| 3506 | |
| 3507 // We are using Bound threads, we need to determine our priority ranges | |
| 3508 if (os::Solaris::T2_libthread() || UseBoundThreads) { | |
| 3509 // If ThreadPriorityPolicy is 1, switch tables | |
| 3510 if (ThreadPriorityPolicy == 1) { | |
| 3511 for (i = 0 ; i < MaxPriority+1; i++) | |
| 3512 os::java_to_os_priority[i] = prio_policy1[i]; | |
| 3513 } | |
| 3514 } | |
| 3515 // Not using Bound Threads, set to ThreadPolicy 1 | |
| 3516 else { | |
| 3517 for ( i = 0 ; i < MaxPriority+1; i++ ) { | |
| 3518 os::java_to_os_priority[i] = prio_policy1[i]; | |
| 3519 } | |
| 3520 return 0; | |
| 3521 } | |
| 3522 | |
| 3523 | |
| 3524 // Get IDs for a set of well-known scheduling classes. | |
| 3525 // TODO-FIXME: GETCLINFO returns the current # of classes in the | |
| 3526 // the system. We should have a loop that iterates over the | |
| 3527 // classID values, which are known to be "small" integers. | |
| 3528 | |
| 3529 strcpy(ClassInfo.pc_clname, "TS"); | |
| 3530 ClassInfo.pc_cid = -1; | |
| 3531 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
| 3532 if (rslt < 0) return errno; | |
| 3533 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); | |
| 3534 tsLimits.schedPolicy = ClassInfo.pc_cid; | |
| 3535 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; | |
| 3536 tsLimits.minPrio = -tsLimits.maxPrio; | |
| 3537 | |
| 3538 strcpy(ClassInfo.pc_clname, "IA"); | |
| 3539 ClassInfo.pc_cid = -1; | |
| 3540 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
| 3541 if (rslt < 0) return errno; | |
| 3542 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); | |
| 3543 iaLimits.schedPolicy = ClassInfo.pc_cid; | |
| 3544 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; | |
| 3545 iaLimits.minPrio = -iaLimits.maxPrio; | |
| 3546 | |
| 3547 strcpy(ClassInfo.pc_clname, "RT"); | |
| 3548 ClassInfo.pc_cid = -1; | |
| 3549 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
| 3550 if (rslt < 0) return errno; | |
| 3551 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); | |
| 3552 rtLimits.schedPolicy = ClassInfo.pc_cid; | |
| 3553 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; | |
| 3554 rtLimits.minPrio = 0; | |
| 3555 | |
| 3556 | |
| 3557 // Query our "current" scheduling class. | |
| 3558 // This will normally be IA,TS or, rarely, RT. | |
| 3559 memset (&ParmInfo, 0, sizeof(ParmInfo)); | |
| 3560 ParmInfo.pc_cid = PC_CLNULL; | |
| 3561 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); | |
| 3562 if ( rslt < 0 ) return errno; | |
| 3563 myClass = ParmInfo.pc_cid; | |
| 3564 | |
| 3565 // We now know our scheduling classId, get specific information | |
| 3566 // the class. | |
| 3567 ClassInfo.pc_cid = myClass; | |
| 3568 ClassInfo.pc_clname[0] = 0; | |
| 3569 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); | |
| 3570 if ( rslt < 0 ) return errno; | |
| 3571 | |
| 3572 if (ThreadPriorityVerbose) | |
| 3573 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); | |
| 3574 | |
| 3575 memset(&ParmInfo, 0, sizeof(pcparms_t)); | |
| 3576 ParmInfo.pc_cid = PC_CLNULL; | |
| 3577 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); | |
| 3578 if (rslt < 0) return errno; | |
| 3579 | |
| 3580 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
| 3581 myMin = rtLimits.minPrio; | |
| 3582 myMax = rtLimits.maxPrio; | |
| 3583 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
| 3584 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; | |
| 3585 myMin = iaLimits.minPrio; | |
| 3586 myMax = iaLimits.maxPrio; | |
| 3587 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict | |
| 3588 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
| 3589 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; | |
| 3590 myMin = tsLimits.minPrio; | |
| 3591 myMax = tsLimits.maxPrio; | |
| 3592 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict | |
| 3593 } else { | |
| 3594 // No clue - punt | |
| 3595 if (ThreadPriorityVerbose) | |
| 3596 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); | |
| 3597 return EINVAL; // no clue, punt | |
| 3598 } | |
| 3599 | |
| 3600 if (ThreadPriorityVerbose) | |
| 3601 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); | |
| 3602 | |
| 3603 priocntl_enable = true; // Enable changing priorities | |
| 3604 return 0; | |
| 3605 } | |
| 3606 | |
| 3607 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) | |
| 3608 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) | |
| 3609 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) | |
| 3610 | |
| 3611 | |
| 3612 // scale_to_lwp_priority | |
| 3613 // | |
| 3614 // Convert from the libthread "thr_setprio" scale to our current | |
| 3615 // lwp scheduling class scale. | |
| 3616 // | |
| 3617 static | |
| 3618 int scale_to_lwp_priority (int rMin, int rMax, int x) | |
| 3619 { | |
| 3620 int v; | |
| 3621 | |
| 3622 if (x == 127) return rMax; // avoid round-down | |
| 3623 v = (((x*(rMax-rMin)))/128)+rMin; | |
| 3624 return v; | |
| 3625 } | |
| 3626 | |
| 3627 | |
| 3628 // set_lwp_priority | |
| 3629 // | |
| 3630 // Set the priority of the lwp. This call should only be made | |
| 3631 // when using bound threads (T2 threads are bound by default). | |
| 3632 // | |
| 3633 int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) | |
| 3634 { | |
| 3635 int rslt; | |
| 3636 int Actual, Expected, prv; | |
| 3637 pcparms_t ParmInfo; // for GET-SET | |
| 3638 #ifdef ASSERT | |
| 3639 pcparms_t ReadBack; // for readback | |
| 3640 #endif | |
| 3641 | |
| 3642 // Set priority via PC_GETPARMS, update, PC_SETPARMS | |
| 3643 // Query current values. | |
| 3644 // TODO: accelerate this by eliminating the PC_GETPARMS call. | |
| 3645 // Cache "pcparms_t" in global ParmCache. | |
| 3646 // TODO: elide set-to-same-value | |
| 3647 | |
| 3648 // If something went wrong on init, don't change priorities. | |
| 3649 if ( !priocntl_enable ) { | |
| 3650 if (ThreadPriorityVerbose) | |
| 3651 tty->print_cr("Trying to set priority but init failed, ignoring"); | |
| 3652 return EINVAL; | |
| 3653 } | |
| 3654 | |
| 3655 | |
| 3656 // If lwp hasn't started yet, just return | |
| 3657 // the _start routine will call us again. | |
| 3658 if ( lwpid <= 0 ) { | |
| 3659 if (ThreadPriorityVerbose) { | |
| 3660 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", | |
| 3661 ThreadID, newPrio); | |
| 3662 } | |
| 3663 return 0; | |
| 3664 } | |
| 3665 | |
| 3666 if (ThreadPriorityVerbose) { | |
| 3667 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", | |
| 3668 ThreadID, lwpid, newPrio); | |
| 3669 } | |
| 3670 | |
| 3671 memset(&ParmInfo, 0, sizeof(pcparms_t)); | |
| 3672 ParmInfo.pc_cid = PC_CLNULL; | |
| 3673 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); | |
| 3674 if (rslt < 0) return errno; | |
| 3675 | |
| 3676 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
| 3677 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; | |
| 3678 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); | |
| 3679 rtInfo->rt_tqsecs = RT_NOCHANGE; | |
| 3680 rtInfo->rt_tqnsecs = RT_NOCHANGE; | |
| 3681 if (ThreadPriorityVerbose) { | |
| 3682 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); | |
| 3683 } | |
| 3684 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
| 3685 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; | |
| 3686 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); | |
| 3687 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); | |
| 3688 iaInfo->ia_uprilim = IA_NOCHANGE; | |
| 3689 iaInfo->ia_nice = IA_NOCHANGE; | |
| 3690 iaInfo->ia_mode = IA_NOCHANGE; | |
| 3691 if (ThreadPriorityVerbose) { | |
| 3692 tty->print_cr ("IA: [%d...%d] %d->%d\n", | |
| 3693 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); | |
| 3694 } | |
| 3695 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
| 3696 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; | |
| 3697 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); | |
| 3698 prv = tsInfo->ts_upri; | |
| 3699 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); | |
| 3700 tsInfo->ts_uprilim = IA_NOCHANGE; | |
| 3701 if (ThreadPriorityVerbose) { | |
| 3702 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", | |
| 3703 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); | |
| 3704 } | |
| 3705 if (prv == tsInfo->ts_upri) return 0; | |
| 3706 } else { | |
| 3707 if ( ThreadPriorityVerbose ) { | |
| 3708 tty->print_cr ("Unknown scheduling class\n"); | |
| 3709 } | |
| 3710 return EINVAL; // no clue, punt | |
| 3711 } | |
| 3712 | |
| 3713 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); | |
| 3714 if (ThreadPriorityVerbose && rslt) { | |
| 3715 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); | |
| 3716 } | |
| 3717 if (rslt < 0) return errno; | |
| 3718 | |
| 3719 #ifdef ASSERT | |
| 3720 // Sanity check: read back what we just attempted to set. | |
| 3721 // In theory it could have changed in the interim ... | |
| 3722 // | |
| 3723 // The priocntl system call is tricky. | |
| 3724 // Sometimes it'll validate the priority value argument and | |
| 3725 // return EINVAL if unhappy. At other times it fails silently. | |
| 3726 // Readbacks are prudent. | |
| 3727 | |
| 3728 if (!ReadBackValidate) return 0; | |
| 3729 | |
| 3730 memset(&ReadBack, 0, sizeof(pcparms_t)); | |
| 3731 ReadBack.pc_cid = PC_CLNULL; | |
| 3732 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); | |
| 3733 assert(rslt >= 0, "priocntl failed"); | |
| 3734 Actual = Expected = 0xBAD; | |
| 3735 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); | |
| 3736 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
| 3737 Actual = RTPRI(ReadBack)->rt_pri; | |
| 3738 Expected = RTPRI(ParmInfo)->rt_pri; | |
| 3739 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
| 3740 Actual = IAPRI(ReadBack)->ia_upri; | |
| 3741 Expected = IAPRI(ParmInfo)->ia_upri; | |
| 3742 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
| 3743 Actual = TSPRI(ReadBack)->ts_upri; | |
| 3744 Expected = TSPRI(ParmInfo)->ts_upri; | |
| 3745 } else { | |
| 3746 if ( ThreadPriorityVerbose ) { | |
| 3747 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); | |
| 3748 } | |
| 3749 } | |
| 3750 | |
| 3751 if (Actual != Expected) { | |
| 3752 if ( ThreadPriorityVerbose ) { | |
| 3753 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", | |
| 3754 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); | |
| 3755 } | |
| 3756 } | |
| 3757 #endif | |
| 3758 | |
| 3759 return 0; | |
| 3760 } | |
| 3761 | |
| 3762 | |
| 3763 | |
| 3764 // Solaris only gives access to 128 real priorities at a time, | |
| 3765 // so we expand Java's ten to fill this range. This would be better | |
| 3766 // if we dynamically adjusted relative priorities. | |
| 3767 // | |
| 3768 // The ThreadPriorityPolicy option allows us to select 2 different | |
| 3769 // priority scales. | |
| 3770 // | |
| 3771 // ThreadPriorityPolicy=0 | |
| 3772 // Since the Solaris' default priority is MaximumPriority, we do not | |
| 3773 // set a priority lower than Max unless a priority lower than | |
| 3774 // NormPriority is requested. | |
| 3775 // | |
| 3776 // ThreadPriorityPolicy=1 | |
| 3777 // This mode causes the priority table to get filled with | |
| 3778 // linear values. NormPriority get's mapped to 50% of the | |
| 3779 // Maximum priority an so on. This will cause VM threads | |
| 3780 // to get unfair treatment against other Solaris processes | |
| 3781 // which do not explicitly alter their thread priorities. | |
| 3782 // | |
| 3783 | |
| 3784 | |
| 3785 int os::java_to_os_priority[MaxPriority + 1] = { | |
| 3786 -99999, // 0 Entry should never be used | |
| 3787 | |
| 3788 0, // 1 MinPriority | |
| 3789 32, // 2 | |
| 3790 64, // 3 | |
| 3791 | |
| 3792 96, // 4 | |
| 3793 127, // 5 NormPriority | |
| 3794 127, // 6 | |
| 3795 | |
| 3796 127, // 7 | |
| 3797 127, // 8 | |
| 3798 127, // 9 NearMaxPriority | |
| 3799 | |
| 3800 127 // 10 MaxPriority | |
| 3801 }; | |
| 3802 | |
| 3803 | |
| 3804 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
| 3805 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); | |
| 3806 if ( !UseThreadPriorities ) return OS_OK; | |
| 3807 int status = thr_setprio(thread->osthread()->thread_id(), newpri); | |
| 3808 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) | |
| 3809 status |= (set_lwp_priority (thread->osthread()->thread_id(), | |
| 3810 thread->osthread()->lwp_id(), newpri )); | |
| 3811 return (status == 0) ? OS_OK : OS_ERR; | |
| 3812 } | |
| 3813 | |
| 3814 | |
| 3815 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
| 3816 int p; | |
| 3817 if ( !UseThreadPriorities ) { | |
| 3818 *priority_ptr = NormalPriority; | |
| 3819 return OS_OK; | |
| 3820 } | |
| 3821 int status = thr_getprio(thread->osthread()->thread_id(), &p); | |
| 3822 if (status != 0) { | |
| 3823 return OS_ERR; | |
| 3824 } | |
| 3825 *priority_ptr = p; | |
| 3826 return OS_OK; | |
| 3827 } | |
| 3828 | |
| 3829 | |
| 3830 // Hint to the underlying OS that a task switch would not be good. | |
| 3831 // Void return because it's a hint and can fail. | |
| 3832 void os::hint_no_preempt() { | |
| 3833 schedctl_start(schedctl_init()); | |
| 3834 } | |
| 3835 | |
| 3836 void os::interrupt(Thread* thread) { | |
| 3837 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); | |
| 3838 | |
| 3839 OSThread* osthread = thread->osthread(); | |
| 3840 | |
| 3841 int isInterrupted = osthread->interrupted(); | |
| 3842 if (!isInterrupted) { | |
| 3843 osthread->set_interrupted(true); | |
| 3844 OrderAccess::fence(); | |
| 3845 // os::sleep() is implemented with either poll (NULL,0,timeout) or | |
| 3846 // by parking on _SleepEvent. If the former, thr_kill will unwedge | |
| 3847 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. | |
| 3848 ParkEvent * const slp = thread->_SleepEvent ; | |
| 3849 if (slp != NULL) slp->unpark() ; | |
| 3850 } | |
| 3851 | |
| 3852 // For JSR166: unpark after setting status but before thr_kill -dl | |
| 3853 if (thread->is_Java_thread()) { | |
| 3854 ((JavaThread*)thread)->parker()->unpark(); | |
| 3855 } | |
| 3856 | |
| 3857 // Handle interruptible wait() ... | |
| 3858 ParkEvent * const ev = thread->_ParkEvent ; | |
| 3859 if (ev != NULL) ev->unpark() ; | |
| 3860 | |
| 3861 // When events are used everywhere for os::sleep, then this thr_kill | |
| 3862 // will only be needed if UseVMInterruptibleIO is true. | |
| 3863 | |
| 3864 if (!isInterrupted) { | |
| 3865 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); | |
| 3866 assert_status(status == 0, status, "thr_kill"); | |
| 3867 | |
| 3868 // Bump thread interruption counter | |
| 3869 RuntimeService::record_thread_interrupt_signaled_count(); | |
| 3870 } | |
| 3871 } | |
| 3872 | |
| 3873 | |
| 3874 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 3875 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); | |
| 3876 | |
| 3877 OSThread* osthread = thread->osthread(); | |
| 3878 | |
| 3879 bool res = osthread->interrupted(); | |
| 3880 | |
| 3881 // NOTE that since there is no "lock" around these two operations, | |
| 3882 // there is the possibility that the interrupted flag will be | |
| 3883 // "false" but that the interrupt event will be set. This is | |
| 3884 // intentional. The effect of this is that Object.wait() will appear | |
| 3885 // to have a spurious wakeup, which is not harmful, and the | |
| 3886 // possibility is so rare that it is not worth the added complexity | |
| 3887 // to add yet another lock. It has also been recommended not to put | |
| 3888 // the interrupted flag into the os::Solaris::Event structure, | |
| 3889 // because it hides the issue. | |
| 3890 if (res && clear_interrupted) { | |
| 3891 osthread->set_interrupted(false); | |
| 3892 } | |
| 3893 return res; | |
| 3894 } | |
| 3895 | |
| 3896 | |
| 3897 void os::print_statistics() { | |
| 3898 } | |
| 3899 | |
| 3900 int os::message_box(const char* title, const char* message) { | |
| 3901 int i; | |
| 3902 fdStream err(defaultStream::error_fd()); | |
| 3903 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 3904 err.cr(); | |
| 3905 err.print_raw_cr(title); | |
| 3906 for (i = 0; i < 78; i++) err.print_raw("-"); | |
| 3907 err.cr(); | |
| 3908 err.print_raw_cr(message); | |
| 3909 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 3910 err.cr(); | |
| 3911 | |
| 3912 char buf[16]; | |
| 3913 // Prevent process from exiting upon "read error" without consuming all CPU | |
| 3914 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
| 3915 | |
| 3916 return buf[0] == 'y' || buf[0] == 'Y'; | |
| 3917 } | |
| 3918 | |
| 3919 // A lightweight implementation that does not suspend the target thread and | |
| 3920 // thus returns only a hint. Used for profiling only! | |
| 3921 ExtendedPC os::get_thread_pc(Thread* thread) { | |
| 3922 // Make sure that it is called by the watcher and the Threads lock is owned. | |
| 3923 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); | |
| 3924 // For now, is only used to profile the VM Thread | |
| 3925 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
| 3926 ExtendedPC epc; | |
| 3927 | |
| 3928 GetThreadPC_Callback cb(ProfileVM_lock); | |
| 3929 OSThread *osthread = thread->osthread(); | |
| 3930 const int time_to_wait = 400; // 400ms wait for initial response | |
| 3931 int status = cb.interrupt(thread, time_to_wait); | |
| 3932 | |
| 3933 if (cb.is_done() ) { | |
| 3934 epc = cb.addr(); | |
| 3935 } else { | |
| 3936 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", | |
| 3937 osthread->thread_id(), status);); | |
| 3938 // epc is already NULL | |
| 3939 } | |
| 3940 return epc; | |
| 3941 } | |
| 3942 | |
| 3943 | |
| 3944 // This does not do anything on Solaris. This is basically a hook for being | |
| 3945 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32. | |
| 3946 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { | |
| 3947 f(value, method, args, thread); | |
| 3948 } | |
| 3949 | |
| 3950 // This routine may be used by user applications as a "hook" to catch signals. | |
| 3951 // The user-defined signal handler must pass unrecognized signals to this | |
| 3952 // routine, and if it returns true (non-zero), then the signal handler must | |
| 3953 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
| 3954 // routine will never retun false (zero), but instead will execute a VM panic | |
| 3955 // routine kill the process. | |
| 3956 // | |
| 3957 // If this routine returns false, it is OK to call it again. This allows | |
| 3958 // the user-defined signal handler to perform checks either before or after | |
| 3959 // the VM performs its own checks. Naturally, the user code would be making | |
| 3960 // a serious error if it tried to handle an exception (such as a null check | |
| 3961 // or breakpoint) that the VM was generating for its own correct operation. | |
| 3962 // | |
| 3963 // This routine may recognize any of the following kinds of signals: | |
| 3964 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, | |
| 3965 // os::Solaris::SIGasync | |
| 3966 // It should be consulted by handlers for any of those signals. | |
| 3967 // It explicitly does not recognize os::Solaris::SIGinterrupt | |
| 3968 // | |
| 3969 // The caller of this routine must pass in the three arguments supplied | |
| 3970 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
| 3971 // field of the structure passed to sigaction(). This routine assumes that | |
| 3972 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
| 3973 // | |
| 3974 // Note that the VM will print warnings if it detects conflicting signal | |
| 3975 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
| 3976 // | |
| 3977 extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); | |
| 3978 | |
| 3979 | |
| 3980 void signalHandler(int sig, siginfo_t* info, void* ucVoid) { | |
| 3981 JVM_handle_solaris_signal(sig, info, ucVoid, true); | |
| 3982 } | |
| 3983 | |
| 3984 /* Do not delete - if guarantee is ever removed, a signal handler (even empty) | |
| 3985 is needed to provoke threads blocked on IO to return an EINTR | |
| 3986 Note: this explicitly does NOT call JVM_handle_solaris_signal and | |
| 3987 does NOT participate in signal chaining due to requirement for | |
| 3988 NOT setting SA_RESTART to make EINTR work. */ | |
| 3989 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { | |
| 3990 if (UseSignalChaining) { | |
| 3991 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); | |
| 3992 if (actp && actp->sa_handler) { | |
| 3993 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); | |
| 3994 } | |
| 3995 } | |
| 3996 } | |
| 3997 | |
| 3998 // This boolean allows users to forward their own non-matching signals | |
| 3999 // to JVM_handle_solaris_signal, harmlessly. | |
| 4000 bool os::Solaris::signal_handlers_are_installed = false; | |
| 4001 | |
| 4002 // For signal-chaining | |
| 4003 bool os::Solaris::libjsig_is_loaded = false; | |
| 4004 typedef struct sigaction *(*get_signal_t)(int); | |
| 4005 get_signal_t os::Solaris::get_signal_action = NULL; | |
| 4006 | |
| 4007 struct sigaction* os::Solaris::get_chained_signal_action(int sig) { | |
| 4008 struct sigaction *actp = NULL; | |
| 4009 | |
| 4010 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { | |
| 4011 // Retrieve the old signal handler from libjsig | |
| 4012 actp = (*get_signal_action)(sig); | |
| 4013 } | |
| 4014 if (actp == NULL) { | |
| 4015 // Retrieve the preinstalled signal handler from jvm | |
| 4016 actp = get_preinstalled_handler(sig); | |
| 4017 } | |
| 4018 | |
| 4019 return actp; | |
| 4020 } | |
| 4021 | |
| 4022 static bool call_chained_handler(struct sigaction *actp, int sig, | |
| 4023 siginfo_t *siginfo, void *context) { | |
| 4024 // Call the old signal handler | |
| 4025 if (actp->sa_handler == SIG_DFL) { | |
| 4026 // It's more reasonable to let jvm treat it as an unexpected exception | |
| 4027 // instead of taking the default action. | |
| 4028 return false; | |
| 4029 } else if (actp->sa_handler != SIG_IGN) { | |
| 4030 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
| 4031 // automaticlly block the signal | |
| 4032 sigaddset(&(actp->sa_mask), sig); | |
| 4033 } | |
| 4034 | |
| 4035 sa_handler_t hand; | |
| 4036 sa_sigaction_t sa; | |
| 4037 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; | |
| 4038 // retrieve the chained handler | |
| 4039 if (siginfo_flag_set) { | |
| 4040 sa = actp->sa_sigaction; | |
| 4041 } else { | |
| 4042 hand = actp->sa_handler; | |
| 4043 } | |
| 4044 | |
| 4045 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
| 4046 actp->sa_handler = SIG_DFL; | |
| 4047 } | |
| 4048 | |
| 4049 // try to honor the signal mask | |
| 4050 sigset_t oset; | |
| 4051 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
| 4052 | |
| 4053 // call into the chained handler | |
| 4054 if (siginfo_flag_set) { | |
| 4055 (*sa)(sig, siginfo, context); | |
| 4056 } else { | |
| 4057 (*hand)(sig); | |
| 4058 } | |
| 4059 | |
| 4060 // restore the signal mask | |
| 4061 thr_sigsetmask(SIG_SETMASK, &oset, 0); | |
| 4062 } | |
| 4063 // Tell jvm's signal handler the signal is taken care of. | |
| 4064 return true; | |
| 4065 } | |
| 4066 | |
| 4067 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
| 4068 bool chained = false; | |
| 4069 // signal-chaining | |
| 4070 if (UseSignalChaining) { | |
| 4071 struct sigaction *actp = get_chained_signal_action(sig); | |
| 4072 if (actp != NULL) { | |
| 4073 chained = call_chained_handler(actp, sig, siginfo, context); | |
| 4074 } | |
| 4075 } | |
| 4076 return chained; | |
| 4077 } | |
| 4078 | |
| 4079 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { | |
| 4080 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); | |
| 4081 if (preinstalled_sigs[sig] != 0) { | |
| 4082 return &chainedsigactions[sig]; | |
| 4083 } | |
| 4084 return NULL; | |
| 4085 } | |
| 4086 | |
| 4087 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
| 4088 | |
| 4089 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); | |
| 4090 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); | |
| 4091 chainedsigactions[sig] = oldAct; | |
| 4092 preinstalled_sigs[sig] = 1; | |
| 4093 } | |
| 4094 | |
| 4095 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { | |
| 4096 // Check for overwrite. | |
| 4097 struct sigaction oldAct; | |
| 4098 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
| 4099 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4100 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4101 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
| 4102 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
| 4103 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { | |
| 4104 if (AllowUserSignalHandlers || !set_installed) { | |
| 4105 // Do not overwrite; user takes responsibility to forward to us. | |
| 4106 return; | |
| 4107 } else if (UseSignalChaining) { | |
| 4108 if (oktochain) { | |
| 4109 // save the old handler in jvm | |
| 4110 save_preinstalled_handler(sig, oldAct); | |
| 4111 } else { | |
| 4112 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); | |
| 4113 } | |
| 4114 // libjsig also interposes the sigaction() call below and saves the | |
| 4115 // old sigaction on it own. | |
| 4116 } else { | |
| 4117 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); | |
| 4118 } | |
| 4119 } | |
| 4120 | |
| 4121 struct sigaction sigAct; | |
| 4122 sigfillset(&(sigAct.sa_mask)); | |
| 4123 sigAct.sa_handler = SIG_DFL; | |
| 4124 | |
| 4125 sigAct.sa_sigaction = signalHandler; | |
| 4126 // Handle SIGSEGV on alternate signal stack if | |
| 4127 // not using stack banging | |
| 4128 if (!UseStackBanging && sig == SIGSEGV) { | |
| 4129 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; | |
| 4130 // Interruptible i/o requires SA_RESTART cleared so EINTR | |
| 4131 // is returned instead of restarting system calls | |
| 4132 } else if (sig == os::Solaris::SIGinterrupt()) { | |
| 4133 sigemptyset(&sigAct.sa_mask); | |
| 4134 sigAct.sa_handler = NULL; | |
| 4135 sigAct.sa_flags = SA_SIGINFO; | |
| 4136 sigAct.sa_sigaction = sigINTRHandler; | |
| 4137 } else { | |
| 4138 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; | |
| 4139 } | |
| 4140 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); | |
| 4141 | |
| 4142 sigaction(sig, &sigAct, &oldAct); | |
| 4143 | |
| 4144 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4145 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4146 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
| 4147 } | |
| 4148 | |
| 4149 | |
| 4150 #define DO_SIGNAL_CHECK(sig) \ | |
| 4151 if (!sigismember(&check_signal_done, sig)) \ | |
| 4152 os::Solaris::check_signal_handler(sig) | |
| 4153 | |
| 4154 // This method is a periodic task to check for misbehaving JNI applications | |
| 4155 // under CheckJNI, we can add any periodic checks here | |
| 4156 | |
| 4157 void os::run_periodic_checks() { | |
| 4158 // A big source of grief is hijacking virt. addr 0x0 on Solaris, | |
| 4159 // thereby preventing a NULL checks. | |
| 4160 if(!check_addr0_done) check_addr0_done = check_addr0(tty); | |
| 4161 | |
| 4162 if (check_signals == false) return; | |
| 4163 | |
| 4164 // SEGV and BUS if overridden could potentially prevent | |
| 4165 // generation of hs*.log in the event of a crash, debugging | |
| 4166 // such a case can be very challenging, so we absolutely | |
| 4167 // check for the following for a good measure: | |
| 4168 DO_SIGNAL_CHECK(SIGSEGV); | |
| 4169 DO_SIGNAL_CHECK(SIGILL); | |
| 4170 DO_SIGNAL_CHECK(SIGFPE); | |
| 4171 DO_SIGNAL_CHECK(SIGBUS); | |
| 4172 DO_SIGNAL_CHECK(SIGPIPE); | |
| 4173 DO_SIGNAL_CHECK(SIGXFSZ); | |
| 4174 | |
| 4175 // ReduceSignalUsage allows the user to override these handlers | |
| 4176 // see comments at the very top and jvm_solaris.h | |
| 4177 if (!ReduceSignalUsage) { | |
| 4178 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
| 4179 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
| 4180 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
| 4181 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
| 4182 } | |
| 4183 | |
| 4184 // See comments above for using JVM1/JVM2 and UseAltSigs | |
| 4185 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); | |
| 4186 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); | |
| 4187 | |
| 4188 } | |
| 4189 | |
| 4190 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
| 4191 | |
| 4192 static os_sigaction_t os_sigaction = NULL; | |
| 4193 | |
| 4194 void os::Solaris::check_signal_handler(int sig) { | |
| 4195 char buf[O_BUFLEN]; | |
| 4196 address jvmHandler = NULL; | |
| 4197 | |
| 4198 struct sigaction act; | |
| 4199 if (os_sigaction == NULL) { | |
| 4200 // only trust the default sigaction, in case it has been interposed | |
| 4201 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
| 4202 if (os_sigaction == NULL) return; | |
| 4203 } | |
| 4204 | |
| 4205 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
| 4206 | |
| 4207 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
| 4208 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
| 4209 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
| 4210 | |
| 4211 | |
| 4212 switch(sig) { | |
| 4213 case SIGSEGV: | |
| 4214 case SIGBUS: | |
| 4215 case SIGFPE: | |
| 4216 case SIGPIPE: | |
| 4217 case SIGXFSZ: | |
| 4218 case SIGILL: | |
| 4219 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); | |
| 4220 break; | |
| 4221 | |
| 4222 case SHUTDOWN1_SIGNAL: | |
| 4223 case SHUTDOWN2_SIGNAL: | |
| 4224 case SHUTDOWN3_SIGNAL: | |
| 4225 case BREAK_SIGNAL: | |
| 4226 jvmHandler = (address)user_handler(); | |
| 4227 break; | |
| 4228 | |
| 4229 default: | |
| 4230 int intrsig = os::Solaris::SIGinterrupt(); | |
| 4231 int asynsig = os::Solaris::SIGasync(); | |
| 4232 | |
| 4233 if (sig == intrsig) { | |
| 4234 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); | |
| 4235 } else if (sig == asynsig) { | |
| 4236 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); | |
| 4237 } else { | |
| 4238 return; | |
| 4239 } | |
| 4240 break; | |
| 4241 } | |
| 4242 | |
| 4243 | |
| 4244 if (thisHandler != jvmHandler) { | |
| 4245 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
| 4246 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
| 4247 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
| 4248 // No need to check this sig any longer | |
| 4249 sigaddset(&check_signal_done, sig); | |
| 4250 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { | |
| 4251 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
| 4252 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); | |
| 4253 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
| 4254 // No need to check this sig any longer | |
| 4255 sigaddset(&check_signal_done, sig); | |
| 4256 } | |
| 4257 | |
| 4258 // Print all the signal handler state | |
| 4259 if (sigismember(&check_signal_done, sig)) { | |
| 4260 print_signal_handlers(tty, buf, O_BUFLEN); | |
| 4261 } | |
| 4262 | |
| 4263 } | |
| 4264 | |
| 4265 void os::Solaris::install_signal_handlers() { | |
| 4266 bool libjsigdone = false; | |
| 4267 signal_handlers_are_installed = true; | |
| 4268 | |
| 4269 // signal-chaining | |
| 4270 typedef void (*signal_setting_t)(); | |
| 4271 signal_setting_t begin_signal_setting = NULL; | |
| 4272 signal_setting_t end_signal_setting = NULL; | |
| 4273 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4274 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
| 4275 if (begin_signal_setting != NULL) { | |
| 4276 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4277 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
| 4278 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
| 4279 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
| 4280 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, | |
| 4281 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); | |
| 4282 libjsig_is_loaded = true; | |
| 4283 if (os::Solaris::get_libjsig_version != NULL) { | |
| 4284 libjsigversion = (*os::Solaris::get_libjsig_version)(); | |
| 4285 } | |
| 4286 assert(UseSignalChaining, "should enable signal-chaining"); | |
| 4287 } | |
| 4288 if (libjsig_is_loaded) { | |
| 4289 // Tell libjsig jvm is setting signal handlers | |
| 4290 (*begin_signal_setting)(); | |
| 4291 } | |
| 4292 | |
| 4293 set_signal_handler(SIGSEGV, true, true); | |
| 4294 set_signal_handler(SIGPIPE, true, true); | |
| 4295 set_signal_handler(SIGXFSZ, true, true); | |
| 4296 set_signal_handler(SIGBUS, true, true); | |
| 4297 set_signal_handler(SIGILL, true, true); | |
| 4298 set_signal_handler(SIGFPE, true, true); | |
| 4299 | |
| 4300 | |
| 4301 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { | |
| 4302 | |
| 4303 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so | |
| 4304 // can not register overridable signals which might be > 32 | |
| 4305 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { | |
| 4306 // Tell libjsig jvm has finished setting signal handlers | |
| 4307 (*end_signal_setting)(); | |
| 4308 libjsigdone = true; | |
| 4309 } | |
| 4310 } | |
| 4311 | |
| 4312 // Never ok to chain our SIGinterrupt | |
| 4313 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); | |
| 4314 set_signal_handler(os::Solaris::SIGasync(), true, true); | |
| 4315 | |
| 4316 if (libjsig_is_loaded && !libjsigdone) { | |
| 4317 // Tell libjsig jvm finishes setting signal handlers | |
| 4318 (*end_signal_setting)(); | |
| 4319 } | |
| 4320 | |
| 4321 // We don't activate signal checker if libjsig is in place, we trust ourselves | |
| 4322 // and if UserSignalHandler is installed all bets are off | |
| 4323 if (CheckJNICalls) { | |
| 4324 if (libjsig_is_loaded) { | |
| 4325 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); | |
| 4326 check_signals = false; | |
| 4327 } | |
| 4328 if (AllowUserSignalHandlers) { | |
| 4329 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); | |
| 4330 check_signals = false; | |
| 4331 } | |
| 4332 } | |
| 4333 } | |
| 4334 | |
| 4335 | |
| 4336 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); | |
| 4337 | |
| 4338 const char * signames[] = { | |
| 4339 "SIG0", | |
| 4340 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", | |
| 4341 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", | |
| 4342 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", | |
| 4343 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", | |
| 4344 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", | |
| 4345 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", | |
| 4346 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", | |
| 4347 "SIGCANCEL", "SIGLOST" | |
| 4348 }; | |
| 4349 | |
| 4350 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
| 4351 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
| 4352 // signal | |
| 4353 if (exception_code < sizeof(signames)/sizeof(const char*)) { | |
| 4354 jio_snprintf(buf, size, "%s", signames[exception_code]); | |
| 4355 } else { | |
| 4356 jio_snprintf(buf, size, "SIG%d", exception_code); | |
| 4357 } | |
| 4358 return buf; | |
| 4359 } else { | |
| 4360 return NULL; | |
| 4361 } | |
| 4362 } | |
| 4363 | |
| 4364 // (Static) wrappers for the new libthread API | |
| 4365 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; | |
| 4366 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; | |
| 4367 int_fnP_thread_t_i os::Solaris::_thr_setmutator; | |
| 4368 int_fnP_thread_t os::Solaris::_thr_suspend_mutator; | |
| 4369 int_fnP_thread_t os::Solaris::_thr_continue_mutator; | |
| 4370 | |
| 4371 // (Static) wrappers for the liblgrp API | |
| 4372 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; | |
| 4373 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; | |
| 4374 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; | |
| 4375 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; | |
| 4376 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; | |
|
144
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|
4377 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; |
| 0 | 4378 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; |
| 4379 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; | |
| 4380 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; | |
| 4381 | |
| 4382 // (Static) wrapper for meminfo() call. | |
| 4383 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; | |
| 4384 | |
| 4385 static address resolve_symbol(const char *name) { | |
| 4386 address addr; | |
| 4387 | |
| 4388 addr = (address) dlsym(RTLD_DEFAULT, name); | |
| 4389 if(addr == NULL) { | |
| 4390 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 | |
| 4391 addr = (address) dlsym(RTLD_NEXT, name); | |
| 4392 if(addr == NULL) { | |
| 4393 fatal(dlerror()); | |
| 4394 } | |
| 4395 } | |
| 4396 return addr; | |
| 4397 } | |
| 4398 | |
| 4399 | |
| 4400 | |
| 4401 // isT2_libthread() | |
| 4402 // | |
| 4403 // Routine to determine if we are currently using the new T2 libthread. | |
| 4404 // | |
| 4405 // We determine if we are using T2 by reading /proc/self/lstatus and | |
| 4406 // looking for a thread with the ASLWP bit set. If we find this status | |
| 4407 // bit set, we must assume that we are NOT using T2. The T2 team | |
| 4408 // has approved this algorithm. | |
| 4409 // | |
| 4410 // We need to determine if we are running with the new T2 libthread | |
| 4411 // since setting native thread priorities is handled differently | |
| 4412 // when using this library. All threads created using T2 are bound | |
| 4413 // threads. Calling thr_setprio is meaningless in this case. | |
| 4414 // | |
| 4415 bool isT2_libthread() { | |
| 4416 static prheader_t * lwpArray = NULL; | |
| 4417 static int lwpSize = 0; | |
| 4418 static int lwpFile = -1; | |
| 4419 lwpstatus_t * that; | |
| 4420 char lwpName [128]; | |
| 4421 bool isT2 = false; | |
| 4422 | |
| 4423 #define ADR(x) ((uintptr_t)(x)) | |
| 4424 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) | |
| 4425 | |
|
89
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|
4426 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); |
|
b97de546208e
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79
diff
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|
4427 if (lwpFile < 0) { |
|
b97de546208e
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diff
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|
4428 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); |
|
b97de546208e
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diff
changeset
|
4429 return false; |
|
b97de546208e
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79
diff
changeset
|
4430 } |
| 0 | 4431 lwpSize = 16*1024; |
| 4432 for (;;) { | |
| 4433 lseek (lwpFile, 0, SEEK_SET); | |
|
89
b97de546208e
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79
diff
changeset
|
4434 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); |
|
b97de546208e
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79
diff
changeset
|
4435 if (read(lwpFile, lwpArray, lwpSize) < 0) { |
|
b97de546208e
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79
diff
changeset
|
4436 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); |
| 0 | 4437 break; |
| 4438 } | |
|
89
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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79
diff
changeset
|
4439 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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parents:
79
diff
changeset
|
4440 // We got a good snapshot - now iterate over the list. |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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parents:
79
diff
changeset
|
4441 int aslwpcount = 0; |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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parents:
79
diff
changeset
|
4442 for (int i = 0; i < lwpArray->pr_nent; i++ ) { |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
xlu
parents:
79
diff
changeset
|
4443 that = LWPINDEX(lwpArray,i); |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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parents:
79
diff
changeset
|
4444 if (that->pr_flags & PR_ASLWP) { |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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parents:
79
diff
changeset
|
4445 aslwpcount++; |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
xlu
parents:
79
diff
changeset
|
4446 } |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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parents:
79
diff
changeset
|
4447 } |
|
b97de546208e
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parents:
79
diff
changeset
|
4448 if (aslwpcount == 0) isT2 = true; |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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parents:
79
diff
changeset
|
4449 break; |
| 0 | 4450 } |
|
89
b97de546208e
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79
diff
changeset
|
4451 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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79
diff
changeset
|
4452 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. |
|
b97de546208e
6671882: memory access after free in solaris/vm/os_solaris.cpp
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79
diff
changeset
|
4453 } |
| 0 | 4454 |
| 4455 FREE_C_HEAP_ARRAY(char, lwpArray); | |
| 4456 close (lwpFile); | |
|
89
b97de546208e
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79
diff
changeset
|
4457 if (ThreadPriorityVerbose) { |
|
b97de546208e
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79
diff
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|
4458 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); |
| 0 | 4459 else tty->print_cr("We are not running with a T2 libthread\n"); |
| 4460 } | |
|
89
b97de546208e
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79
diff
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|
4461 return isT2; |
| 0 | 4462 } |
| 4463 | |
| 4464 | |
| 4465 void os::Solaris::libthread_init() { | |
| 4466 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); | |
| 4467 | |
| 4468 // Determine if we are running with the new T2 libthread | |
| 4469 os::Solaris::set_T2_libthread(isT2_libthread()); | |
| 4470 | |
| 4471 lwp_priocntl_init(); | |
| 4472 | |
| 4473 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 | |
| 4474 if(func == NULL) { | |
| 4475 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); | |
| 4476 // Guarantee that this VM is running on an new enough OS (5.6 or | |
| 4477 // later) that it will have a new enough libthread.so. | |
| 4478 guarantee(func != NULL, "libthread.so is too old."); | |
| 4479 } | |
| 4480 | |
| 4481 // Initialize the new libthread getstate API wrappers | |
| 4482 func = resolve_symbol("thr_getstate"); | |
| 4483 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); | |
| 4484 | |
| 4485 func = resolve_symbol("thr_setstate"); | |
| 4486 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); | |
| 4487 | |
| 4488 func = resolve_symbol("thr_setmutator"); | |
| 4489 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); | |
| 4490 | |
| 4491 func = resolve_symbol("thr_suspend_mutator"); | |
| 4492 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); | |
| 4493 | |
| 4494 func = resolve_symbol("thr_continue_mutator"); | |
| 4495 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); | |
| 4496 | |
| 4497 int size; | |
| 4498 void (*handler_info_func)(address *, int *); | |
| 4499 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); | |
| 4500 handler_info_func(&handler_start, &size); | |
| 4501 handler_end = handler_start + size; | |
| 4502 } | |
| 4503 | |
| 4504 | |
| 4505 int_fnP_mutex_tP os::Solaris::_mutex_lock; | |
| 4506 int_fnP_mutex_tP os::Solaris::_mutex_trylock; | |
| 4507 int_fnP_mutex_tP os::Solaris::_mutex_unlock; | |
| 4508 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; | |
| 4509 int_fnP_mutex_tP os::Solaris::_mutex_destroy; | |
| 4510 int os::Solaris::_mutex_scope = USYNC_THREAD; | |
| 4511 | |
| 4512 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; | |
| 4513 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; | |
| 4514 int_fnP_cond_tP os::Solaris::_cond_signal; | |
| 4515 int_fnP_cond_tP os::Solaris::_cond_broadcast; | |
| 4516 int_fnP_cond_tP_i_vP os::Solaris::_cond_init; | |
| 4517 int_fnP_cond_tP os::Solaris::_cond_destroy; | |
| 4518 int os::Solaris::_cond_scope = USYNC_THREAD; | |
| 4519 | |
| 4520 void os::Solaris::synchronization_init() { | |
| 4521 if(UseLWPSynchronization) { | |
| 4522 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); | |
| 4523 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); | |
| 4524 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); | |
| 4525 os::Solaris::set_mutex_init(lwp_mutex_init); | |
| 4526 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); | |
| 4527 os::Solaris::set_mutex_scope(USYNC_THREAD); | |
| 4528 | |
| 4529 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); | |
| 4530 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); | |
| 4531 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); | |
| 4532 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); | |
| 4533 os::Solaris::set_cond_init(lwp_cond_init); | |
| 4534 os::Solaris::set_cond_destroy(lwp_cond_destroy); | |
| 4535 os::Solaris::set_cond_scope(USYNC_THREAD); | |
| 4536 } | |
| 4537 else { | |
| 4538 os::Solaris::set_mutex_scope(USYNC_THREAD); | |
| 4539 os::Solaris::set_cond_scope(USYNC_THREAD); | |
| 4540 | |
| 4541 if(UsePthreads) { | |
| 4542 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); | |
| 4543 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); | |
| 4544 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); | |
| 4545 os::Solaris::set_mutex_init(pthread_mutex_default_init); | |
| 4546 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); | |
| 4547 | |
| 4548 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); | |
| 4549 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); | |
| 4550 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); | |
| 4551 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); | |
| 4552 os::Solaris::set_cond_init(pthread_cond_default_init); | |
| 4553 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); | |
| 4554 } | |
| 4555 else { | |
| 4556 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); | |
| 4557 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); | |
| 4558 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); | |
| 4559 os::Solaris::set_mutex_init(::mutex_init); | |
| 4560 os::Solaris::set_mutex_destroy(::mutex_destroy); | |
| 4561 | |
| 4562 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); | |
| 4563 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); | |
| 4564 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); | |
| 4565 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); | |
| 4566 os::Solaris::set_cond_init(::cond_init); | |
| 4567 os::Solaris::set_cond_destroy(::cond_destroy); | |
| 4568 } | |
| 4569 } | |
| 4570 } | |
| 4571 | |
| 4572 void os::Solaris::liblgrp_init() { | |
|
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144
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|
4573 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); |
| 0 | 4574 if (handle != NULL) { |
| 4575 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); | |
| 4576 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); | |
| 4577 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); | |
| 4578 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); | |
| 4579 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); | |
|
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141
diff
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|
4580 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); |
| 0 | 4581 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); |
| 4582 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, | |
| 4583 dlsym(handle, "lgrp_cookie_stale"))); | |
| 4584 | |
| 4585 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); | |
| 4586 set_lgrp_cookie(c); | |
| 4587 } else { | |
| 4588 warning("your OS does not support NUMA"); | |
| 4589 } | |
| 4590 } | |
| 4591 | |
| 4592 void os::Solaris::misc_sym_init() { | |
| 4593 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); | |
| 4594 if(func == NULL) { | |
| 4595 func = (address) dlsym(RTLD_NEXT, "meminfo"); | |
| 4596 } | |
| 4597 if (func != NULL) { | |
| 4598 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); | |
| 4599 } | |
| 4600 } | |
| 4601 | |
| 4602 // Symbol doesn't exist in Solaris 8 pset.h | |
| 4603 #ifndef PS_MYID | |
| 4604 #define PS_MYID -3 | |
| 4605 #endif | |
| 4606 | |
| 4607 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); | |
| 4608 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); | |
| 4609 static pset_getloadavg_type pset_getloadavg_ptr = NULL; | |
| 4610 | |
| 4611 void init_pset_getloadavg_ptr(void) { | |
| 4612 pset_getloadavg_ptr = | |
| 4613 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); | |
| 4614 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { | |
| 4615 warning("pset_getloadavg function not found"); | |
| 4616 } | |
| 4617 } | |
| 4618 | |
| 4619 int os::Solaris::_dev_zero_fd = -1; | |
| 4620 | |
| 4621 // this is called _before_ the global arguments have been parsed | |
| 4622 void os::init(void) { | |
| 4623 _initial_pid = getpid(); | |
| 4624 | |
| 4625 max_hrtime = first_hrtime = gethrtime(); | |
| 4626 | |
| 4627 init_random(1234567); | |
| 4628 | |
| 4629 page_size = sysconf(_SC_PAGESIZE); | |
| 4630 if (page_size == -1) | |
| 4631 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); | |
| 4632 init_page_sizes((size_t) page_size); | |
| 4633 | |
| 4634 Solaris::initialize_system_info(); | |
| 4635 | |
| 4636 int fd = open("/dev/zero", O_RDWR); | |
| 4637 if (fd < 0) { | |
| 4638 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); | |
| 4639 } else { | |
| 4640 Solaris::set_dev_zero_fd(fd); | |
| 4641 | |
| 4642 // Close on exec, child won't inherit. | |
| 4643 fcntl(fd, F_SETFD, FD_CLOEXEC); | |
| 4644 } | |
| 4645 | |
| 4646 clock_tics_per_sec = CLK_TCK; | |
| 4647 | |
| 4648 // check if dladdr1() exists; dladdr1 can provide more information than | |
| 4649 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 | |
| 4650 // and is available on linker patches for 5.7 and 5.8. | |
| 4651 // libdl.so must have been loaded, this call is just an entry lookup | |
| 4652 void * hdl = dlopen("libdl.so", RTLD_NOW); | |
| 4653 if (hdl) | |
| 4654 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); | |
| 4655 | |
| 4656 // (Solaris only) this switches to calls that actually do locking. | |
| 4657 ThreadCritical::initialize(); | |
| 4658 | |
| 4659 main_thread = thr_self(); | |
| 4660 | |
| 4661 // Constant minimum stack size allowed. It must be at least | |
| 4662 // the minimum of what the OS supports (thr_min_stack()), and | |
| 4663 // enough to allow the thread to get to user bytecode execution. | |
| 4664 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); | |
| 4665 // If the pagesize of the VM is greater than 8K determine the appropriate | |
| 4666 // number of initial guard pages. The user can change this with the | |
| 4667 // command line arguments, if needed. | |
| 4668 if (vm_page_size() > 8*K) { | |
| 4669 StackYellowPages = 1; | |
| 4670 StackRedPages = 1; | |
| 4671 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); | |
| 4672 } | |
| 4673 } | |
| 4674 | |
| 4675 // To install functions for atexit system call | |
| 4676 extern "C" { | |
| 4677 static void perfMemory_exit_helper() { | |
| 4678 perfMemory_exit(); | |
| 4679 } | |
| 4680 } | |
| 4681 | |
| 4682 // this is called _after_ the global arguments have been parsed | |
| 4683 jint os::init_2(void) { | |
| 4684 // try to enable extended file IO ASAP, see 6431278 | |
| 4685 os::Solaris::try_enable_extended_io(); | |
| 4686 | |
| 4687 // Allocate a single page and mark it as readable for safepoint polling. Also | |
| 4688 // use this first mmap call to check support for MAP_ALIGN. | |
| 4689 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, | |
| 4690 page_size, | |
| 4691 MAP_PRIVATE | MAP_ALIGN, | |
| 4692 PROT_READ); | |
| 4693 if (polling_page == NULL) { | |
| 4694 has_map_align = false; | |
| 4695 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, | |
| 4696 PROT_READ); | |
| 4697 } | |
| 4698 | |
| 4699 os::set_polling_page(polling_page); | |
| 4700 | |
| 4701 #ifndef PRODUCT | |
| 4702 if( Verbose && PrintMiscellaneous ) | |
| 4703 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
| 4704 #endif | |
| 4705 | |
| 4706 if (!UseMembar) { | |
| 4707 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); | |
| 4708 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); | |
| 4709 os::set_memory_serialize_page( mem_serialize_page ); | |
| 4710 | |
| 4711 #ifndef PRODUCT | |
| 4712 if(Verbose && PrintMiscellaneous) | |
| 4713 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
| 4714 #endif | |
| 4715 } | |
| 4716 | |
| 4717 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); | |
| 4718 | |
| 4719 // Check minimum allowable stack size for thread creation and to initialize | |
| 4720 // the java system classes, including StackOverflowError - depends on page | |
| 4721 // size. Add a page for compiler2 recursion in main thread. | |
| 4722 // Add in BytesPerWord times page size to account for VM stack during | |
| 4723 // class initialization depending on 32 or 64 bit VM. | |
| 4724 guarantee((Solaris::min_stack_allowed >= | |
| 4725 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord | |
| 4726 COMPILER2_PRESENT(+1)) * page_size), | |
| 4727 "need to increase Solaris::min_stack_allowed on this platform"); | |
| 4728 | |
| 4729 size_t threadStackSizeInBytes = ThreadStackSize * K; | |
| 4730 if (threadStackSizeInBytes != 0 && | |
| 4731 threadStackSizeInBytes < Solaris::min_stack_allowed) { | |
| 4732 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", | |
| 4733 Solaris::min_stack_allowed/K); | |
| 4734 return JNI_ERR; | |
| 4735 } | |
| 4736 | |
| 4737 // For 64kbps there will be a 64kb page size, which makes | |
| 4738 // the usable default stack size quite a bit less. Increase the | |
| 4739 // stack for 64kb (or any > than 8kb) pages, this increases | |
| 4740 // virtual memory fragmentation (since we're not creating the | |
| 4741 // stack on a power of 2 boundary. The real fix for this | |
| 4742 // should be to fix the guard page mechanism. | |
| 4743 | |
| 4744 if (vm_page_size() > 8*K) { | |
| 4745 threadStackSizeInBytes = (threadStackSizeInBytes != 0) | |
| 4746 ? threadStackSizeInBytes + | |
| 4747 ((StackYellowPages + StackRedPages) * vm_page_size()) | |
| 4748 : 0; | |
| 4749 ThreadStackSize = threadStackSizeInBytes/K; | |
| 4750 } | |
| 4751 | |
| 4752 // Make the stack size a multiple of the page size so that | |
| 4753 // the yellow/red zones can be guarded. | |
| 4754 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
| 4755 vm_page_size())); | |
| 4756 | |
| 4757 Solaris::libthread_init(); | |
| 4758 if (UseNUMA) { | |
| 4759 Solaris::liblgrp_init(); | |
| 4760 } | |
| 4761 Solaris::misc_sym_init(); | |
| 4762 Solaris::signal_sets_init(); | |
| 4763 Solaris::init_signal_mem(); | |
| 4764 Solaris::install_signal_handlers(); | |
| 4765 | |
| 4766 if (libjsigversion < JSIG_VERSION_1_4_1) { | |
| 4767 Maxlibjsigsigs = OLDMAXSIGNUM; | |
| 4768 } | |
| 4769 | |
| 4770 // initialize synchronization primitives to use either thread or | |
| 4771 // lwp synchronization (controlled by UseLWPSynchronization) | |
| 4772 Solaris::synchronization_init(); | |
| 4773 | |
| 4774 if (MaxFDLimit) { | |
| 4775 // set the number of file descriptors to max. print out error | |
| 4776 // if getrlimit/setrlimit fails but continue regardless. | |
| 4777 struct rlimit nbr_files; | |
| 4778 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4779 if (status != 0) { | |
| 4780 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4781 perror("os::init_2 getrlimit failed"); | |
| 4782 } else { | |
| 4783 nbr_files.rlim_cur = nbr_files.rlim_max; | |
| 4784 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4785 if (status != 0) { | |
| 4786 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4787 perror("os::init_2 setrlimit failed"); | |
| 4788 } | |
| 4789 } | |
| 4790 } | |
| 4791 | |
| 4792 // Initialize HPI. | |
| 4793 jint hpi_result = hpi::initialize(); | |
| 4794 if (hpi_result != JNI_OK) { | |
| 4795 tty->print_cr("There was an error trying to initialize the HPI library."); | |
| 4796 return hpi_result; | |
| 4797 } | |
| 4798 | |
| 4799 // Calculate theoretical max. size of Threads to guard gainst | |
| 4800 // artifical out-of-memory situations, where all available address- | |
| 4801 // space has been reserved by thread stacks. Default stack size is 1Mb. | |
| 4802 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? | |
| 4803 JavaThread::stack_size_at_create() : (1*K*K); | |
| 4804 assert(pre_thread_stack_size != 0, "Must have a stack"); | |
| 4805 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when | |
| 4806 // we should start doing Virtual Memory banging. Currently when the threads will | |
| 4807 // have used all but 200Mb of space. | |
| 4808 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); | |
| 4809 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; | |
| 4810 | |
| 4811 // at-exit methods are called in the reverse order of their registration. | |
| 4812 // In Solaris 7 and earlier, atexit functions are called on return from | |
| 4813 // main or as a result of a call to exit(3C). There can be only 32 of | |
| 4814 // these functions registered and atexit() does not set errno. In Solaris | |
| 4815 // 8 and later, there is no limit to the number of functions registered | |
| 4816 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit | |
| 4817 // functions are called upon dlclose(3DL) in addition to return from main | |
| 4818 // and exit(3C). | |
| 4819 | |
| 4820 if (PerfAllowAtExitRegistration) { | |
| 4821 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
| 4822 // atexit functions can be delayed until process exit time, which | |
| 4823 // can be problematic for embedded VM situations. Embedded VMs should | |
| 4824 // call DestroyJavaVM() to assure that VM resources are released. | |
| 4825 | |
| 4826 // note: perfMemory_exit_helper atexit function may be removed in | |
| 4827 // the future if the appropriate cleanup code can be added to the | |
| 4828 // VM_Exit VMOperation's doit method. | |
| 4829 if (atexit(perfMemory_exit_helper) != 0) { | |
| 4830 warning("os::init2 atexit(perfMemory_exit_helper) failed"); | |
| 4831 } | |
| 4832 } | |
| 4833 | |
| 4834 // Init pset_loadavg function pointer | |
| 4835 init_pset_getloadavg_ptr(); | |
| 4836 | |
| 4837 return JNI_OK; | |
| 4838 } | |
| 4839 | |
| 4840 | |
| 4841 // Mark the polling page as unreadable | |
| 4842 void os::make_polling_page_unreadable(void) { | |
| 4843 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) | |
| 4844 fatal("Could not disable polling page"); | |
| 4845 }; | |
| 4846 | |
| 4847 // Mark the polling page as readable | |
| 4848 void os::make_polling_page_readable(void) { | |
| 4849 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) | |
| 4850 fatal("Could not enable polling page"); | |
| 4851 }; | |
| 4852 | |
| 4853 // OS interface. | |
| 4854 | |
| 4855 int os::stat(const char *path, struct stat *sbuf) { | |
| 4856 char pathbuf[MAX_PATH]; | |
| 4857 if (strlen(path) > MAX_PATH - 1) { | |
| 4858 errno = ENAMETOOLONG; | |
| 4859 return -1; | |
| 4860 } | |
| 4861 hpi::native_path(strcpy(pathbuf, path)); | |
| 4862 return ::stat(pathbuf, sbuf); | |
| 4863 } | |
| 4864 | |
| 4865 | |
| 4866 bool os::check_heap(bool force) { return true; } | |
| 4867 | |
| 4868 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); | |
| 4869 static vsnprintf_t sol_vsnprintf = NULL; | |
| 4870 | |
| 4871 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { | |
| 4872 if (!sol_vsnprintf) { | |
| 4873 //search for the named symbol in the objects that were loaded after libjvm | |
| 4874 void* where = RTLD_NEXT; | |
| 4875 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) | |
| 4876 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); | |
| 4877 if (!sol_vsnprintf){ | |
| 4878 //search for the named symbol in the objects that were loaded before libjvm | |
| 4879 where = RTLD_DEFAULT; | |
| 4880 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) | |
| 4881 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); | |
| 4882 assert(sol_vsnprintf != NULL, "vsnprintf not found"); | |
| 4883 } | |
| 4884 } | |
| 4885 return (*sol_vsnprintf)(buf, count, fmt, argptr); | |
| 4886 } | |
| 4887 | |
| 4888 | |
| 4889 // Is a (classpath) directory empty? | |
| 4890 bool os::dir_is_empty(const char* path) { | |
| 4891 DIR *dir = NULL; | |
| 4892 struct dirent *ptr; | |
| 4893 | |
| 4894 dir = opendir(path); | |
| 4895 if (dir == NULL) return true; | |
| 4896 | |
| 4897 /* Scan the directory */ | |
| 4898 bool result = true; | |
| 4899 char buf[sizeof(struct dirent) + MAX_PATH]; | |
| 4900 struct dirent *dbuf = (struct dirent *) buf; | |
| 4901 while (result && (ptr = readdir(dir, dbuf)) != NULL) { | |
| 4902 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
| 4903 result = false; | |
| 4904 } | |
| 4905 } | |
| 4906 closedir(dir); | |
| 4907 return result; | |
| 4908 } | |
| 4909 | |
| 4910 // create binary file, rewriting existing file if required | |
| 4911 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
| 4912 int oflags = O_WRONLY | O_CREAT; | |
| 4913 if (!rewrite_existing) { | |
| 4914 oflags |= O_EXCL; | |
| 4915 } | |
| 4916 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
| 4917 } | |
| 4918 | |
| 4919 // return current position of file pointer | |
| 4920 jlong os::current_file_offset(int fd) { | |
| 4921 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
| 4922 } | |
| 4923 | |
| 4924 // move file pointer to the specified offset | |
| 4925 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
| 4926 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
| 4927 } | |
| 4928 | |
| 4929 // Map a block of memory. | |
| 4930 char* os::map_memory(int fd, const char* file_name, size_t file_offset, | |
| 4931 char *addr, size_t bytes, bool read_only, | |
| 4932 bool allow_exec) { | |
| 4933 int prot; | |
| 4934 int flags; | |
| 4935 | |
| 4936 if (read_only) { | |
| 4937 prot = PROT_READ; | |
| 4938 flags = MAP_SHARED; | |
| 4939 } else { | |
| 4940 prot = PROT_READ | PROT_WRITE; | |
| 4941 flags = MAP_PRIVATE; | |
| 4942 } | |
| 4943 | |
| 4944 if (allow_exec) { | |
| 4945 prot |= PROT_EXEC; | |
| 4946 } | |
| 4947 | |
| 4948 if (addr != NULL) { | |
| 4949 flags |= MAP_FIXED; | |
| 4950 } | |
| 4951 | |
| 4952 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
| 4953 fd, file_offset); | |
| 4954 if (mapped_address == MAP_FAILED) { | |
| 4955 return NULL; | |
| 4956 } | |
| 4957 return mapped_address; | |
| 4958 } | |
| 4959 | |
| 4960 | |
| 4961 // Remap a block of memory. | |
| 4962 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, | |
| 4963 char *addr, size_t bytes, bool read_only, | |
| 4964 bool allow_exec) { | |
| 4965 // same as map_memory() on this OS | |
| 4966 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
| 4967 allow_exec); | |
| 4968 } | |
| 4969 | |
| 4970 | |
| 4971 // Unmap a block of memory. | |
| 4972 bool os::unmap_memory(char* addr, size_t bytes) { | |
| 4973 return munmap(addr, bytes) == 0; | |
| 4974 } | |
| 4975 | |
| 4976 void os::pause() { | |
| 4977 char filename[MAX_PATH]; | |
| 4978 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
| 4979 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
| 4980 } else { | |
| 4981 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
| 4982 } | |
| 4983 | |
| 4984 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
| 4985 if (fd != -1) { | |
| 4986 struct stat buf; | |
| 4987 close(fd); | |
| 4988 while (::stat(filename, &buf) == 0) { | |
| 4989 (void)::poll(NULL, 0, 100); | |
| 4990 } | |
| 4991 } else { | |
| 4992 jio_fprintf(stderr, | |
| 4993 "Could not open pause file '%s', continuing immediately.\n", filename); | |
| 4994 } | |
| 4995 } | |
| 4996 | |
| 4997 #ifndef PRODUCT | |
| 4998 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS | |
| 4999 // Turn this on if you need to trace synch operations. | |
| 5000 // Set RECORD_SYNCH_LIMIT to a large-enough value, | |
| 5001 // and call record_synch_enable and record_synch_disable | |
| 5002 // around the computation of interest. | |
| 5003 | |
| 5004 void record_synch(char* name, bool returning); // defined below | |
| 5005 | |
| 5006 class RecordSynch { | |
| 5007 char* _name; | |
| 5008 public: | |
| 5009 RecordSynch(char* name) :_name(name) | |
| 5010 { record_synch(_name, false); } | |
| 5011 ~RecordSynch() { record_synch(_name, true); } | |
| 5012 }; | |
| 5013 | |
| 5014 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \ | |
| 5015 extern "C" ret name params { \ | |
| 5016 typedef ret name##_t params; \ | |
| 5017 static name##_t* implem = NULL; \ | |
| 5018 static int callcount = 0; \ | |
| 5019 if (implem == NULL) { \ | |
| 5020 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ | |
| 5021 if (implem == NULL) fatal(dlerror()); \ | |
| 5022 } \ | |
| 5023 ++callcount; \ | |
| 5024 RecordSynch _rs(#name); \ | |
| 5025 inner; \ | |
| 5026 return implem args; \ | |
| 5027 } | |
| 5028 // in dbx, examine callcounts this way: | |
| 5029 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done | |
| 5030 | |
| 5031 #define CHECK_POINTER_OK(p) \ | |
| 5032 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) | |
| 5033 #define CHECK_MU \ | |
| 5034 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); | |
| 5035 #define CHECK_CV \ | |
| 5036 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); | |
| 5037 #define CHECK_P(p) \ | |
| 5038 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); | |
| 5039 | |
| 5040 #define CHECK_MUTEX(mutex_op) \ | |
| 5041 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); | |
| 5042 | |
| 5043 CHECK_MUTEX( mutex_lock) | |
| 5044 CHECK_MUTEX( _mutex_lock) | |
| 5045 CHECK_MUTEX( mutex_unlock) | |
| 5046 CHECK_MUTEX(_mutex_unlock) | |
| 5047 CHECK_MUTEX( mutex_trylock) | |
| 5048 CHECK_MUTEX(_mutex_trylock) | |
| 5049 | |
| 5050 #define CHECK_COND(cond_op) \ | |
| 5051 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); | |
| 5052 | |
| 5053 CHECK_COND( cond_wait); | |
| 5054 CHECK_COND(_cond_wait); | |
| 5055 CHECK_COND(_cond_wait_cancel); | |
| 5056 | |
| 5057 #define CHECK_COND2(cond_op) \ | |
| 5058 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); | |
| 5059 | |
| 5060 CHECK_COND2( cond_timedwait); | |
| 5061 CHECK_COND2(_cond_timedwait); | |
| 5062 CHECK_COND2(_cond_timedwait_cancel); | |
| 5063 | |
| 5064 // do the _lwp_* versions too | |
| 5065 #define mutex_t lwp_mutex_t | |
| 5066 #define cond_t lwp_cond_t | |
| 5067 CHECK_MUTEX( _lwp_mutex_lock) | |
| 5068 CHECK_MUTEX( _lwp_mutex_unlock) | |
| 5069 CHECK_MUTEX( _lwp_mutex_trylock) | |
| 5070 CHECK_MUTEX( __lwp_mutex_lock) | |
| 5071 CHECK_MUTEX( __lwp_mutex_unlock) | |
| 5072 CHECK_MUTEX( __lwp_mutex_trylock) | |
| 5073 CHECK_MUTEX(___lwp_mutex_lock) | |
| 5074 CHECK_MUTEX(___lwp_mutex_unlock) | |
| 5075 | |
| 5076 CHECK_COND( _lwp_cond_wait); | |
| 5077 CHECK_COND( __lwp_cond_wait); | |
| 5078 CHECK_COND(___lwp_cond_wait); | |
| 5079 | |
| 5080 CHECK_COND2( _lwp_cond_timedwait); | |
| 5081 CHECK_COND2( __lwp_cond_timedwait); | |
| 5082 #undef mutex_t | |
| 5083 #undef cond_t | |
| 5084 | |
| 5085 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); | |
| 5086 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); | |
| 5087 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); | |
| 5088 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); | |
| 5089 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); | |
| 5090 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); | |
| 5091 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); | |
| 5092 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); | |
| 5093 | |
| 5094 | |
| 5095 // recording machinery: | |
| 5096 | |
| 5097 enum { RECORD_SYNCH_LIMIT = 200 }; | |
| 5098 char* record_synch_name[RECORD_SYNCH_LIMIT]; | |
| 5099 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; | |
| 5100 bool record_synch_returning[RECORD_SYNCH_LIMIT]; | |
| 5101 thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; | |
| 5102 int record_synch_count = 0; | |
| 5103 bool record_synch_enabled = false; | |
| 5104 | |
| 5105 // in dbx, examine recorded data this way: | |
| 5106 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done | |
| 5107 | |
| 5108 void record_synch(char* name, bool returning) { | |
| 5109 if (record_synch_enabled) { | |
| 5110 if (record_synch_count < RECORD_SYNCH_LIMIT) { | |
| 5111 record_synch_name[record_synch_count] = name; | |
| 5112 record_synch_returning[record_synch_count] = returning; | |
| 5113 record_synch_thread[record_synch_count] = thr_self(); | |
| 5114 record_synch_arg0ptr[record_synch_count] = &name; | |
| 5115 record_synch_count++; | |
| 5116 } | |
| 5117 // put more checking code here: | |
| 5118 // ... | |
| 5119 } | |
| 5120 } | |
| 5121 | |
| 5122 void record_synch_enable() { | |
| 5123 // start collecting trace data, if not already doing so | |
| 5124 if (!record_synch_enabled) record_synch_count = 0; | |
| 5125 record_synch_enabled = true; | |
| 5126 } | |
| 5127 | |
| 5128 void record_synch_disable() { | |
| 5129 // stop collecting trace data | |
| 5130 record_synch_enabled = false; | |
| 5131 } | |
| 5132 | |
| 5133 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS | |
| 5134 #endif // PRODUCT | |
| 5135 | |
| 5136 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); | |
| 5137 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - | |
| 5138 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); | |
| 5139 | |
| 5140 | |
| 5141 // JVMTI & JVM monitoring and management support | |
| 5142 // The thread_cpu_time() and current_thread_cpu_time() are only | |
| 5143 // supported if is_thread_cpu_time_supported() returns true. | |
| 5144 // They are not supported on Solaris T1. | |
| 5145 | |
| 5146 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
| 5147 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
| 5148 // of a thread. | |
| 5149 // | |
| 5150 // current_thread_cpu_time() and thread_cpu_time(Thread *) | |
| 5151 // returns the fast estimate available on the platform. | |
| 5152 | |
| 5153 // hrtime_t gethrvtime() return value includes | |
| 5154 // user time but does not include system time | |
| 5155 jlong os::current_thread_cpu_time() { | |
| 5156 return (jlong) gethrvtime(); | |
| 5157 } | |
| 5158 | |
| 5159 jlong os::thread_cpu_time(Thread *thread) { | |
| 5160 // return user level CPU time only to be consistent with | |
| 5161 // what current_thread_cpu_time returns. | |
| 5162 // thread_cpu_time_info() must be changed if this changes | |
| 5163 return os::thread_cpu_time(thread, false /* user time only */); | |
| 5164 } | |
| 5165 | |
| 5166 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
| 5167 if (user_sys_cpu_time) { | |
| 5168 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
| 5169 } else { | |
| 5170 return os::current_thread_cpu_time(); | |
| 5171 } | |
| 5172 } | |
| 5173 | |
| 5174 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 5175 char proc_name[64]; | |
| 5176 int count; | |
| 5177 prusage_t prusage; | |
| 5178 jlong lwp_time; | |
| 5179 int fd; | |
| 5180 | |
| 5181 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", | |
| 5182 getpid(), | |
| 5183 thread->osthread()->lwp_id()); | |
| 5184 fd = open(proc_name, O_RDONLY); | |
| 5185 if ( fd == -1 ) return -1; | |
| 5186 | |
| 5187 do { | |
| 5188 count = pread(fd, | |
| 5189 (void *)&prusage.pr_utime, | |
| 5190 thr_time_size, | |
| 5191 thr_time_off); | |
| 5192 } while (count < 0 && errno == EINTR); | |
| 5193 close(fd); | |
| 5194 if ( count < 0 ) return -1; | |
| 5195 | |
| 5196 if (user_sys_cpu_time) { | |
| 5197 // user + system CPU time | |
| 5198 lwp_time = (((jlong)prusage.pr_stime.tv_sec + | |
| 5199 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + | |
| 5200 (jlong)prusage.pr_stime.tv_nsec + | |
| 5201 (jlong)prusage.pr_utime.tv_nsec; | |
| 5202 } else { | |
| 5203 // user level CPU time only | |
| 5204 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + | |
| 5205 (jlong)prusage.pr_utime.tv_nsec; | |
| 5206 } | |
| 5207 | |
| 5208 return(lwp_time); | |
| 5209 } | |
| 5210 | |
| 5211 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5212 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5213 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5214 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5215 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned | |
| 5216 } | |
| 5217 | |
| 5218 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5219 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5220 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5221 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5222 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned | |
| 5223 } | |
| 5224 | |
| 5225 bool os::is_thread_cpu_time_supported() { | |
| 5226 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { | |
| 5227 return true; | |
| 5228 } else { | |
| 5229 return false; | |
| 5230 } | |
| 5231 } | |
| 5232 | |
| 5233 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 5234 // Return the load average for our processor set if the primitive exists | |
| 5235 // (Solaris 9 and later). Otherwise just return system wide loadavg. | |
| 5236 int os::loadavg(double loadavg[], int nelem) { | |
| 5237 if (pset_getloadavg_ptr != NULL) { | |
| 5238 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); | |
| 5239 } else { | |
| 5240 return ::getloadavg(loadavg, nelem); | |
| 5241 } | |
| 5242 } | |
| 5243 | |
| 5244 //--------------------------------------------------------------------------------- | |
| 5245 #ifndef PRODUCT | |
| 5246 | |
| 5247 static address same_page(address x, address y) { | |
| 5248 intptr_t page_bits = -os::vm_page_size(); | |
| 5249 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) | |
| 5250 return x; | |
| 5251 else if (x > y) | |
| 5252 return (address)(intptr_t(y) | ~page_bits) + 1; | |
| 5253 else | |
| 5254 return (address)(intptr_t(y) & page_bits); | |
| 5255 } | |
| 5256 | |
| 5257 bool os::find(address addr) { | |
| 5258 Dl_info dlinfo; | |
| 5259 memset(&dlinfo, 0, sizeof(dlinfo)); | |
| 5260 if (dladdr(addr, &dlinfo)) { | |
| 5261 #ifdef _LP64 | |
| 5262 tty->print("0x%016lx: ", addr); | |
| 5263 #else | |
| 5264 tty->print("0x%08x: ", addr); | |
| 5265 #endif | |
| 5266 if (dlinfo.dli_sname != NULL) | |
| 5267 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); | |
| 5268 else if (dlinfo.dli_fname) | |
| 5269 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); | |
| 5270 else | |
| 5271 tty->print("<absolute address>"); | |
| 5272 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); | |
| 5273 #ifdef _LP64 | |
| 5274 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); | |
| 5275 #else | |
| 5276 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); | |
| 5277 #endif | |
| 5278 tty->cr(); | |
| 5279 | |
| 5280 if (Verbose) { | |
| 5281 // decode some bytes around the PC | |
| 5282 address begin = same_page(addr-40, addr); | |
| 5283 address end = same_page(addr+40, addr); | |
| 5284 address lowest = (address) dlinfo.dli_sname; | |
| 5285 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
| 5286 if (begin < lowest) begin = lowest; | |
| 5287 Dl_info dlinfo2; | |
| 5288 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr | |
| 5289 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) | |
| 5290 end = (address) dlinfo2.dli_saddr; | |
| 5291 Disassembler::decode(begin, end); | |
| 5292 } | |
| 5293 return true; | |
| 5294 } | |
| 5295 return false; | |
| 5296 } | |
| 5297 | |
| 5298 #endif | |
| 5299 | |
| 5300 | |
| 5301 // Following function has been added to support HotSparc's libjvm.so running | |
| 5302 // under Solaris production JDK 1.2.2 / 1.3.0. These came from | |
| 5303 // src/solaris/hpi/native_threads in the EVM codebase. | |
| 5304 // | |
| 5305 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release | |
| 5306 // libraries and should thus be removed. We will leave it behind for a while | |
| 5307 // until we no longer want to able to run on top of 1.3.0 Solaris production | |
| 5308 // JDK. See 4341971. | |
| 5309 | |
| 5310 #define STACK_SLACK 0x800 | |
| 5311 | |
| 5312 extern "C" { | |
| 5313 intptr_t sysThreadAvailableStackWithSlack() { | |
| 5314 stack_t st; | |
| 5315 intptr_t retval, stack_top; | |
| 5316 retval = thr_stksegment(&st); | |
| 5317 assert(retval == 0, "incorrect return value from thr_stksegment"); | |
| 5318 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); | |
| 5319 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); | |
| 5320 stack_top=(intptr_t)st.ss_sp-st.ss_size; | |
| 5321 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); | |
| 5322 } | |
| 5323 } | |
| 5324 | |
| 5325 // Just to get the Kernel build to link on solaris for testing. | |
| 5326 | |
| 5327 extern "C" { | |
| 5328 class ASGCT_CallTrace; | |
| 5329 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) | |
| 5330 KERNEL_RETURN; | |
| 5331 } | |
| 5332 | |
| 5333 | |
| 5334 // ObjectMonitor park-unpark infrastructure ... | |
| 5335 // | |
| 5336 // We implement Solaris and Linux PlatformEvents with the | |
| 5337 // obvious condvar-mutex-flag triple. | |
| 5338 // Another alternative that works quite well is pipes: | |
| 5339 // Each PlatformEvent consists of a pipe-pair. | |
| 5340 // The thread associated with the PlatformEvent | |
| 5341 // calls park(), which reads from the input end of the pipe. | |
| 5342 // Unpark() writes into the other end of the pipe. | |
| 5343 // The write-side of the pipe must be set NDELAY. | |
| 5344 // Unfortunately pipes consume a large # of handles. | |
| 5345 // Native solaris lwp_park() and lwp_unpark() work nicely, too. | |
| 5346 // Using pipes for the 1st few threads might be workable, however. | |
| 5347 // | |
| 5348 // park() is permitted to return spuriously. | |
| 5349 // Callers of park() should wrap the call to park() in | |
| 5350 // an appropriate loop. A litmus test for the correct | |
| 5351 // usage of park is the following: if park() were modified | |
| 5352 // to immediately return 0 your code should still work, | |
| 5353 // albeit degenerating to a spin loop. | |
| 5354 // | |
| 5355 // An interesting optimization for park() is to use a trylock() | |
| 5356 // to attempt to acquire the mutex. If the trylock() fails | |
| 5357 // then we know that a concurrent unpark() operation is in-progress. | |
| 5358 // in that case the park() code could simply set _count to 0 | |
| 5359 // and return immediately. The subsequent park() operation *might* | |
| 5360 // return immediately. That's harmless as the caller of park() is | |
| 5361 // expected to loop. By using trylock() we will have avoided a | |
| 5362 // avoided a context switch caused by contention on the per-thread mutex. | |
| 5363 // | |
| 5364 // TODO-FIXME: | |
| 5365 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the | |
| 5366 // objectmonitor implementation. | |
| 5367 // 2. Collapse the JSR166 parker event, and the | |
| 5368 // objectmonitor ParkEvent into a single "Event" construct. | |
| 5369 // 3. In park() and unpark() add: | |
| 5370 // assert (Thread::current() == AssociatedWith). | |
| 5371 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. | |
| 5372 // 1-out-of-N park() operations will return immediately. | |
| 5373 // | |
| 5374 // _Event transitions in park() | |
| 5375 // -1 => -1 : illegal | |
| 5376 // 1 => 0 : pass - return immediately | |
| 5377 // 0 => -1 : block | |
| 5378 // | |
| 5379 // _Event serves as a restricted-range semaphore. | |
| 5380 // | |
| 5381 // Another possible encoding of _Event would be with | |
| 5382 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits. | |
| 5383 // | |
| 5384 // TODO-FIXME: add DTRACE probes for: | |
| 5385 // 1. Tx parks | |
| 5386 // 2. Ty unparks Tx | |
| 5387 // 3. Tx resumes from park | |
| 5388 | |
| 5389 | |
| 5390 // value determined through experimentation | |
| 5391 #define ROUNDINGFIX 11 | |
| 5392 | |
| 5393 // utility to compute the abstime argument to timedwait. | |
| 5394 // TODO-FIXME: switch from compute_abstime() to unpackTime(). | |
| 5395 | |
| 5396 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { | |
| 5397 // millis is the relative timeout time | |
| 5398 // abstime will be the absolute timeout time | |
| 5399 if (millis < 0) millis = 0; | |
| 5400 struct timeval now; | |
| 5401 int status = gettimeofday(&now, NULL); | |
| 5402 assert(status == 0, "gettimeofday"); | |
| 5403 jlong seconds = millis / 1000; | |
| 5404 jlong max_wait_period; | |
| 5405 | |
| 5406 if (UseLWPSynchronization) { | |
| 5407 // forward port of fix for 4275818 (not sleeping long enough) | |
| 5408 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where | |
| 5409 // _lwp_cond_timedwait() used a round_down algorithm rather | |
| 5410 // than a round_up. For millis less than our roundfactor | |
| 5411 // it rounded down to 0 which doesn't meet the spec. | |
| 5412 // For millis > roundfactor we may return a bit sooner, but | |
| 5413 // since we can not accurately identify the patch level and | |
| 5414 // this has already been fixed in Solaris 9 and 8 we will | |
| 5415 // leave it alone rather than always rounding down. | |
| 5416 | |
| 5417 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; | |
| 5418 // It appears that when we go directly through Solaris _lwp_cond_timedwait() | |
| 5419 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 | |
| 5420 max_wait_period = 21000000; | |
| 5421 } else { | |
| 5422 max_wait_period = 50000000; | |
| 5423 } | |
| 5424 millis %= 1000; | |
| 5425 if (seconds > max_wait_period) { // see man cond_timedwait(3T) | |
| 5426 seconds = max_wait_period; | |
| 5427 } | |
| 5428 abstime->tv_sec = now.tv_sec + seconds; | |
| 5429 long usec = now.tv_usec + millis * 1000; | |
| 5430 if (usec >= 1000000) { | |
| 5431 abstime->tv_sec += 1; | |
| 5432 usec -= 1000000; | |
| 5433 } | |
| 5434 abstime->tv_nsec = usec * 1000; | |
| 5435 return abstime; | |
| 5436 } | |
| 5437 | |
| 5438 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
| 5439 // Conceptually TryPark() should be equivalent to park(0). | |
| 5440 | |
| 5441 int os::PlatformEvent::TryPark() { | |
| 5442 for (;;) { | |
| 5443 const int v = _Event ; | |
| 5444 guarantee ((v == 0) || (v == 1), "invariant") ; | |
| 5445 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
| 5446 } | |
| 5447 } | |
| 5448 | |
| 5449 void os::PlatformEvent::park() { // AKA: down() | |
| 5450 // Invariant: Only the thread associated with the Event/PlatformEvent | |
| 5451 // may call park(). | |
| 5452 int v ; | |
| 5453 for (;;) { | |
| 5454 v = _Event ; | |
| 5455 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5456 } | |
| 5457 guarantee (v >= 0, "invariant") ; | |
| 5458 if (v == 0) { | |
| 5459 // Do this the hard way by blocking ... | |
| 5460 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
| 5461 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. | |
| 5462 // Only for SPARC >= V8PlusA | |
| 5463 #if defined(__sparc) && defined(COMPILER2) | |
| 5464 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
| 5465 #endif | |
| 5466 int status = os::Solaris::mutex_lock(_mutex); | |
| 5467 assert_status(status == 0, status, "mutex_lock"); | |
| 5468 guarantee (_nParked == 0, "invariant") ; | |
| 5469 ++ _nParked ; | |
| 5470 while (_Event < 0) { | |
| 5471 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
| 5472 // Treat this the same as if the wait was interrupted | |
| 5473 // With usr/lib/lwp going to kernel, always handle ETIME | |
| 5474 status = os::Solaris::cond_wait(_cond, _mutex); | |
| 5475 if (status == ETIME) status = EINTR ; | |
| 5476 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
| 5477 } | |
| 5478 -- _nParked ; | |
| 5479 _Event = 0 ; | |
| 5480 status = os::Solaris::mutex_unlock(_mutex); | |
| 5481 assert_status(status == 0, status, "mutex_unlock"); | |
| 5482 } | |
| 5483 } | |
| 5484 | |
| 5485 int os::PlatformEvent::park(jlong millis) { | |
| 5486 guarantee (_nParked == 0, "invariant") ; | |
| 5487 int v ; | |
| 5488 for (;;) { | |
| 5489 v = _Event ; | |
| 5490 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5491 } | |
| 5492 guarantee (v >= 0, "invariant") ; | |
| 5493 if (v != 0) return OS_OK ; | |
| 5494 | |
| 5495 int ret = OS_TIMEOUT; | |
| 5496 timestruc_t abst; | |
| 5497 compute_abstime (&abst, millis); | |
| 5498 | |
| 5499 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
| 5500 // For Solaris SPARC set fprs.FEF=0 prior to parking. | |
| 5501 // Only for SPARC >= V8PlusA | |
| 5502 #if defined(__sparc) && defined(COMPILER2) | |
| 5503 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
| 5504 #endif | |
| 5505 int status = os::Solaris::mutex_lock(_mutex); | |
| 5506 assert_status(status == 0, status, "mutex_lock"); | |
| 5507 guarantee (_nParked == 0, "invariant") ; | |
| 5508 ++ _nParked ; | |
| 5509 while (_Event < 0) { | |
| 5510 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); | |
| 5511 assert_status(status == 0 || status == EINTR || | |
| 5512 status == ETIME || status == ETIMEDOUT, | |
| 5513 status, "cond_timedwait"); | |
| 5514 if (!FilterSpuriousWakeups) break ; // previous semantics | |
| 5515 if (status == ETIME || status == ETIMEDOUT) break ; | |
| 5516 // We consume and ignore EINTR and spurious wakeups. | |
| 5517 } | |
| 5518 -- _nParked ; | |
| 5519 if (_Event >= 0) ret = OS_OK ; | |
| 5520 _Event = 0 ; | |
| 5521 status = os::Solaris::mutex_unlock(_mutex); | |
| 5522 assert_status(status == 0, status, "mutex_unlock"); | |
| 5523 return ret; | |
| 5524 } | |
| 5525 | |
| 5526 void os::PlatformEvent::unpark() { | |
| 5527 int v, AnyWaiters; | |
| 5528 | |
| 5529 // Increment _Event. | |
| 5530 // Another acceptable implementation would be to simply swap 1 | |
| 5531 // into _Event: | |
| 5532 // if (Swap (&_Event, 1) < 0) { | |
| 5533 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; | |
| 5534 // if (AnyWaiters) cond_signal (_cond) ; | |
| 5535 // } | |
| 5536 | |
| 5537 for (;;) { | |
| 5538 v = _Event ; | |
| 5539 if (v > 0) { | |
| 5540 // The LD of _Event could have reordered or be satisfied | |
| 5541 // by a read-aside from this processor's write buffer. | |
| 5542 // To avoid problems execute a barrier and then | |
| 5543 // ratify the value. A degenerate CAS() would also work. | |
| 5544 // Viz., CAS (v+0, &_Event, v) == v). | |
| 5545 OrderAccess::fence() ; | |
| 5546 if (_Event == v) return ; | |
| 5547 continue ; | |
| 5548 } | |
| 5549 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; | |
| 5550 } | |
| 5551 | |
| 5552 // If the thread associated with the event was parked, wake it. | |
| 5553 if (v < 0) { | |
| 5554 int status ; | |
| 5555 // Wait for the thread assoc with the PlatformEvent to vacate. | |
| 5556 status = os::Solaris::mutex_lock(_mutex); | |
| 5557 assert_status(status == 0, status, "mutex_lock"); | |
| 5558 AnyWaiters = _nParked ; | |
| 5559 status = os::Solaris::mutex_unlock(_mutex); | |
| 5560 assert_status(status == 0, status, "mutex_unlock"); | |
| 5561 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; | |
| 5562 if (AnyWaiters != 0) { | |
| 5563 // We intentional signal *after* dropping the lock | |
| 5564 // to avoid a common class of futile wakeups. | |
| 5565 status = os::Solaris::cond_signal(_cond); | |
| 5566 assert_status(status == 0, status, "cond_signal"); | |
| 5567 } | |
| 5568 } | |
| 5569 } | |
| 5570 | |
| 5571 // JSR166 | |
| 5572 // ------------------------------------------------------- | |
| 5573 | |
| 5574 /* | |
| 5575 * The solaris and linux implementations of park/unpark are fairly | |
| 5576 * conservative for now, but can be improved. They currently use a | |
| 5577 * mutex/condvar pair, plus _counter. | |
| 5578 * Park decrements _counter if > 0, else does a condvar wait. Unpark | |
| 5579 * sets count to 1 and signals condvar. Only one thread ever waits | |
| 5580 * on the condvar. Contention seen when trying to park implies that someone | |
| 5581 * is unparking you, so don't wait. And spurious returns are fine, so there | |
| 5582 * is no need to track notifications. | |
| 5583 */ | |
| 5584 | |
| 5585 #define NANOSECS_PER_SEC 1000000000 | |
| 5586 #define NANOSECS_PER_MILLISEC 1000000 | |
| 5587 #define MAX_SECS 100000000 | |
| 5588 | |
| 5589 /* | |
| 5590 * This code is common to linux and solaris and will be moved to a | |
| 5591 * common place in dolphin. | |
| 5592 * | |
| 5593 * The passed in time value is either a relative time in nanoseconds | |
| 5594 * or an absolute time in milliseconds. Either way it has to be unpacked | |
| 5595 * into suitable seconds and nanoseconds components and stored in the | |
| 5596 * given timespec structure. | |
| 5597 * Given time is a 64-bit value and the time_t used in the timespec is only | |
| 5598 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
| 5599 * overflow if times way in the future are given. Further on Solaris versions | |
| 5600 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
| 5601 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
| 5602 * As it will be 28 years before "now + 100000000" will overflow we can | |
| 5603 * ignore overflow and just impose a hard-limit on seconds using the value | |
| 5604 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
| 5605 * years from "now". | |
| 5606 */ | |
| 5607 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
| 5608 assert (time > 0, "convertTime"); | |
| 5609 | |
| 5610 struct timeval now; | |
| 5611 int status = gettimeofday(&now, NULL); | |
| 5612 assert(status == 0, "gettimeofday"); | |
| 5613 | |
| 5614 time_t max_secs = now.tv_sec + MAX_SECS; | |
| 5615 | |
| 5616 if (isAbsolute) { | |
| 5617 jlong secs = time / 1000; | |
| 5618 if (secs > max_secs) { | |
| 5619 absTime->tv_sec = max_secs; | |
| 5620 } | |
| 5621 else { | |
| 5622 absTime->tv_sec = secs; | |
| 5623 } | |
| 5624 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; | |
| 5625 } | |
| 5626 else { | |
| 5627 jlong secs = time / NANOSECS_PER_SEC; | |
| 5628 if (secs >= MAX_SECS) { | |
| 5629 absTime->tv_sec = max_secs; | |
| 5630 absTime->tv_nsec = 0; | |
| 5631 } | |
| 5632 else { | |
| 5633 absTime->tv_sec = now.tv_sec + secs; | |
| 5634 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; | |
| 5635 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { | |
| 5636 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
| 5637 ++absTime->tv_sec; // note: this must be <= max_secs | |
| 5638 } | |
| 5639 } | |
| 5640 } | |
| 5641 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
| 5642 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
| 5643 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
| 5644 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
| 5645 } | |
| 5646 | |
| 5647 void Parker::park(bool isAbsolute, jlong time) { | |
| 5648 | |
| 5649 // Optional fast-path check: | |
| 5650 // Return immediately if a permit is available. | |
| 5651 if (_counter > 0) { | |
| 5652 _counter = 0 ; | |
| 5653 return ; | |
| 5654 } | |
| 5655 | |
| 5656 // Optional fast-exit: Check interrupt before trying to wait | |
| 5657 Thread* thread = Thread::current(); | |
| 5658 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
| 5659 JavaThread *jt = (JavaThread *)thread; | |
| 5660 if (Thread::is_interrupted(thread, false)) { | |
| 5661 return; | |
| 5662 } | |
| 5663 | |
| 5664 // First, demultiplex/decode time arguments | |
| 5665 timespec absTime; | |
| 5666 if (time < 0) { // don't wait at all | |
| 5667 return; | |
| 5668 } | |
| 5669 if (time > 0) { | |
| 5670 // Warning: this code might be exposed to the old Solaris time | |
| 5671 // round-down bugs. Grep "roundingFix" for details. | |
| 5672 unpackTime(&absTime, isAbsolute, time); | |
| 5673 } | |
| 5674 | |
| 5675 // Enter safepoint region | |
| 5676 // Beware of deadlocks such as 6317397. | |
| 5677 // The per-thread Parker:: _mutex is a classic leaf-lock. | |
| 5678 // In particular a thread must never block on the Threads_lock while | |
| 5679 // holding the Parker:: mutex. If safepoints are pending both the | |
| 5680 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
| 5681 ThreadBlockInVM tbivm(jt); | |
| 5682 | |
| 5683 // Don't wait if cannot get lock since interference arises from | |
| 5684 // unblocking. Also. check interrupt before trying wait | |
| 5685 if (Thread::is_interrupted(thread, false) || | |
| 5686 os::Solaris::mutex_trylock(_mutex) != 0) { | |
| 5687 return; | |
| 5688 } | |
| 5689 | |
| 5690 int status ; | |
| 5691 | |
| 5692 if (_counter > 0) { // no wait needed | |
| 5693 _counter = 0; | |
| 5694 status = os::Solaris::mutex_unlock(_mutex); | |
| 5695 assert (status == 0, "invariant") ; | |
| 5696 return; | |
| 5697 } | |
| 5698 | |
| 5699 #ifdef ASSERT | |
| 5700 // Don't catch signals while blocked; let the running threads have the signals. | |
| 5701 // (This allows a debugger to break into the running thread.) | |
| 5702 sigset_t oldsigs; | |
| 5703 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); | |
| 5704 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
| 5705 #endif | |
| 5706 | |
| 5707 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 5708 jt->set_suspend_equivalent(); | |
| 5709 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 5710 | |
| 5711 // Do this the hard way by blocking ... | |
| 5712 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
| 5713 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. | |
| 5714 // Only for SPARC >= V8PlusA | |
| 5715 #if defined(__sparc) && defined(COMPILER2) | |
| 5716 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
| 5717 #endif | |
| 5718 | |
| 5719 if (time == 0) { | |
| 5720 status = os::Solaris::cond_wait (_cond, _mutex) ; | |
| 5721 } else { | |
| 5722 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); | |
| 5723 } | |
| 5724 // Note that an untimed cond_wait() can sometimes return ETIME on older | |
| 5725 // versions of the Solaris. | |
| 5726 assert_status(status == 0 || status == EINTR || | |
| 5727 status == ETIME || status == ETIMEDOUT, | |
| 5728 status, "cond_timedwait"); | |
| 5729 | |
| 5730 #ifdef ASSERT | |
| 5731 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); | |
| 5732 #endif | |
| 5733 _counter = 0 ; | |
| 5734 status = os::Solaris::mutex_unlock(_mutex); | |
| 5735 assert_status(status == 0, status, "mutex_unlock") ; | |
| 5736 | |
| 5737 // If externally suspended while waiting, re-suspend | |
| 5738 if (jt->handle_special_suspend_equivalent_condition()) { | |
| 5739 jt->java_suspend_self(); | |
| 5740 } | |
| 5741 | |
| 5742 } | |
| 5743 | |
| 5744 void Parker::unpark() { | |
| 5745 int s, status ; | |
| 5746 status = os::Solaris::mutex_lock (_mutex) ; | |
| 5747 assert (status == 0, "invariant") ; | |
| 5748 s = _counter; | |
| 5749 _counter = 1; | |
| 5750 status = os::Solaris::mutex_unlock (_mutex) ; | |
| 5751 assert (status == 0, "invariant") ; | |
| 5752 | |
| 5753 if (s < 1) { | |
| 5754 status = os::Solaris::cond_signal (_cond) ; | |
| 5755 assert (status == 0, "invariant") ; | |
| 5756 } | |
| 5757 } | |
| 5758 | |
| 5759 extern char** environ; | |
| 5760 | |
| 5761 // Run the specified command in a separate process. Return its exit value, | |
| 5762 // or -1 on failure (e.g. can't fork a new process). | |
| 5763 // Unlike system(), this function can be called from signal handler. It | |
| 5764 // doesn't block SIGINT et al. | |
| 5765 int os::fork_and_exec(char* cmd) { | |
| 5766 char * argv[4]; | |
| 5767 argv[0] = (char *)"sh"; | |
| 5768 argv[1] = (char *)"-c"; | |
| 5769 argv[2] = cmd; | |
| 5770 argv[3] = NULL; | |
| 5771 | |
| 5772 // fork is async-safe, fork1 is not so can't use in signal handler | |
| 5773 pid_t pid; | |
| 5774 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 5775 if (t != NULL && t->is_inside_signal_handler()) { | |
| 5776 pid = fork(); | |
| 5777 } else { | |
| 5778 pid = fork1(); | |
| 5779 } | |
| 5780 | |
| 5781 if (pid < 0) { | |
| 5782 // fork failed | |
| 5783 warning("fork failed: %s", strerror(errno)); | |
| 5784 return -1; | |
| 5785 | |
| 5786 } else if (pid == 0) { | |
| 5787 // child process | |
| 5788 | |
| 5789 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris | |
| 5790 execve("/usr/bin/sh", argv, environ); | |
| 5791 | |
| 5792 // execve failed | |
| 5793 _exit(-1); | |
| 5794 | |
| 5795 } else { | |
| 5796 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
| 5797 // care about the actual exit code, for now. | |
| 5798 | |
| 5799 int status; | |
| 5800 | |
| 5801 // Wait for the child process to exit. This returns immediately if | |
| 5802 // the child has already exited. */ | |
| 5803 while (waitpid(pid, &status, 0) < 0) { | |
| 5804 switch (errno) { | |
| 5805 case ECHILD: return 0; | |
| 5806 case EINTR: break; | |
| 5807 default: return -1; | |
| 5808 } | |
| 5809 } | |
| 5810 | |
| 5811 if (WIFEXITED(status)) { | |
| 5812 // The child exited normally; get its exit code. | |
| 5813 return WEXITSTATUS(status); | |
| 5814 } else if (WIFSIGNALED(status)) { | |
| 5815 // The child exited because of a signal | |
| 5816 // The best value to return is 0x80 + signal number, | |
| 5817 // because that is what all Unix shells do, and because | |
| 5818 // it allows callers to distinguish between process exit and | |
| 5819 // process death by signal. | |
| 5820 return 0x80 + WTERMSIG(status); | |
| 5821 } else { | |
| 5822 // Unknown exit code; pass it through | |
| 5823 return status; | |
| 5824 } | |
| 5825 } | |
| 5826 } |