Mercurial > hg > truffle
annotate src/os/solaris/vm/os_solaris.cpp @ 1123:167c2986d91b
6843629: Make current hotspot build part of jdk5 control build
Summary: Source changes for older compilers plus makefile changes.
Reviewed-by: xlu
| author | phh |
|---|---|
| date | Wed, 16 Dec 2009 12:54:49 -0500 |
| parents | 95e9083cf4a7 |
| children | 3b3d12e645e7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 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 | |
|
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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 | |
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326 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
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327 return localtime_r(clock, res); |
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328 } |
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329 |
| 0 | 330 // interruptible infrastructure |
| 331 | |
| 332 // setup_interruptible saves the thread state before going into an | |
| 333 // interruptible system call. | |
| 334 // The saved state is used to restore the thread to | |
| 335 // its former state whether or not an interrupt is received. | |
| 336 // Used by classloader os::read | |
| 337 // hpi calls skip this layer and stay in _thread_in_native | |
| 338 | |
| 339 void os::Solaris::setup_interruptible(JavaThread* thread) { | |
| 340 | |
| 341 JavaThreadState thread_state = thread->thread_state(); | |
| 342 | |
| 343 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); | |
| 344 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); | |
| 345 OSThread* osthread = thread->osthread(); | |
| 346 osthread->set_saved_interrupt_thread_state(thread_state); | |
| 347 thread->frame_anchor()->make_walkable(thread); | |
| 348 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); | |
| 349 } | |
| 350 | |
| 351 // Version of setup_interruptible() for threads that are already in | |
| 352 // _thread_blocked. Used by os_sleep(). | |
| 353 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { | |
| 354 thread->frame_anchor()->make_walkable(thread); | |
| 355 } | |
| 356 | |
| 357 JavaThread* os::Solaris::setup_interruptible() { | |
| 358 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); | |
| 359 setup_interruptible(thread); | |
| 360 return thread; | |
| 361 } | |
| 362 | |
| 363 void os::Solaris::try_enable_extended_io() { | |
| 364 typedef int (*enable_extended_FILE_stdio_t)(int, int); | |
| 365 | |
| 366 if (!UseExtendedFileIO) { | |
| 367 return; | |
| 368 } | |
| 369 | |
| 370 enable_extended_FILE_stdio_t enabler = | |
| 371 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, | |
| 372 "enable_extended_FILE_stdio"); | |
| 373 if (enabler) { | |
| 374 enabler(-1, -1); | |
| 375 } | |
| 376 } | |
| 377 | |
| 378 | |
| 379 #ifdef ASSERT | |
| 380 | |
| 381 JavaThread* os::Solaris::setup_interruptible_native() { | |
| 382 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); | |
| 383 JavaThreadState thread_state = thread->thread_state(); | |
| 384 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); | |
| 385 return thread; | |
| 386 } | |
| 387 | |
| 388 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { | |
| 389 JavaThreadState thread_state = thread->thread_state(); | |
| 390 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); | |
| 391 } | |
| 392 #endif | |
| 393 | |
| 394 // cleanup_interruptible reverses the effects of setup_interruptible | |
| 395 // setup_interruptible_already_blocked() does not need any cleanup. | |
| 396 | |
| 397 void os::Solaris::cleanup_interruptible(JavaThread* thread) { | |
| 398 OSThread* osthread = thread->osthread(); | |
| 399 | |
| 400 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); | |
| 401 } | |
| 402 | |
| 403 // I/O interruption related counters called in _INTERRUPTIBLE | |
| 404 | |
| 405 void os::Solaris::bump_interrupted_before_count() { | |
| 406 RuntimeService::record_interrupted_before_count(); | |
| 407 } | |
| 408 | |
| 409 void os::Solaris::bump_interrupted_during_count() { | |
| 410 RuntimeService::record_interrupted_during_count(); | |
| 411 } | |
| 412 | |
| 413 static int _processors_online = 0; | |
| 414 | |
| 415 jint os::Solaris::_os_thread_limit = 0; | |
| 416 volatile jint os::Solaris::_os_thread_count = 0; | |
| 417 | |
| 418 julong os::available_memory() { | |
| 419 return Solaris::available_memory(); | |
| 420 } | |
| 421 | |
| 422 julong os::Solaris::available_memory() { | |
| 423 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); | |
| 424 } | |
| 425 | |
| 426 julong os::Solaris::_physical_memory = 0; | |
| 427 | |
| 428 julong os::physical_memory() { | |
| 429 return Solaris::physical_memory(); | |
| 430 } | |
| 431 | |
| 432 julong os::allocatable_physical_memory(julong size) { | |
| 433 #ifdef _LP64 | |
| 434 return size; | |
| 435 #else | |
| 436 julong result = MIN2(size, (julong)3835*M); | |
| 437 if (!is_allocatable(result)) { | |
| 438 // Memory allocations will be aligned but the alignment | |
| 439 // is not known at this point. Alignments will | |
| 440 // be at most to LargePageSizeInBytes. Protect | |
| 441 // allocations from alignments up to illegal | |
| 442 // values. If at this point 2G is illegal. | |
| 443 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; | |
| 444 result = MIN2(size, reasonable_size); | |
| 445 } | |
| 446 return result; | |
| 447 #endif | |
| 448 } | |
| 449 | |
| 450 static hrtime_t first_hrtime = 0; | |
| 451 static const hrtime_t hrtime_hz = 1000*1000*1000; | |
| 452 const int LOCK_BUSY = 1; | |
| 453 const int LOCK_FREE = 0; | |
| 454 const int LOCK_INVALID = -1; | |
| 455 static volatile hrtime_t max_hrtime = 0; | |
| 456 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress | |
| 457 | |
| 458 | |
| 459 void os::Solaris::initialize_system_info() { | |
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460 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); |
| 0 | 461 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); |
| 462 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); | |
| 463 } | |
| 464 | |
| 465 int os::active_processor_count() { | |
| 466 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); | |
| 467 pid_t pid = getpid(); | |
| 468 psetid_t pset = PS_NONE; | |
|
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469 // Are we running in a processor set or is there any processor set around? |
| 0 | 470 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { |
|
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471 uint_t pset_cpus; |
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472 // Query the number of cpus available to us. |
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473 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { |
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474 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); |
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475 _processors_online = pset_cpus; |
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476 return pset_cpus; |
| 0 | 477 } |
| 478 } | |
| 479 // Otherwise return number of online cpus | |
| 480 return online_cpus; | |
| 481 } | |
| 482 | |
| 483 static bool find_processors_in_pset(psetid_t pset, | |
| 484 processorid_t** id_array, | |
| 485 uint_t* id_length) { | |
| 486 bool result = false; | |
| 487 // Find the number of processors in the processor set. | |
| 488 if (pset_info(pset, NULL, id_length, NULL) == 0) { | |
| 489 // Make up an array to hold their ids. | |
| 490 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); | |
| 491 // Fill in the array with their processor ids. | |
| 492 if (pset_info(pset, NULL, id_length, *id_array) == 0) { | |
| 493 result = true; | |
| 494 } | |
| 495 } | |
| 496 return result; | |
| 497 } | |
| 498 | |
| 499 // Callers of find_processors_online() must tolerate imprecise results -- | |
| 500 // the system configuration can change asynchronously because of DR | |
| 501 // or explicit psradm operations. | |
| 502 // | |
| 503 // We also need to take care that the loop (below) terminates as the | |
| 504 // number of processors online can change between the _SC_NPROCESSORS_ONLN | |
| 505 // request and the loop that builds the list of processor ids. Unfortunately | |
| 506 // there's no reliable way to determine the maximum valid processor id, | |
| 507 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online | |
| 508 // man pages, which claim the processor id set is "sparse, but | |
| 509 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually | |
| 510 // exit the loop. | |
| 511 // | |
| 512 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's | |
| 513 // not available on S8.0. | |
| 514 | |
| 515 static bool find_processors_online(processorid_t** id_array, | |
| 516 uint* id_length) { | |
| 517 const processorid_t MAX_PROCESSOR_ID = 100000 ; | |
| 518 // Find the number of processors online. | |
| 519 *id_length = sysconf(_SC_NPROCESSORS_ONLN); | |
| 520 // Make up an array to hold their ids. | |
| 521 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); | |
| 522 // Processors need not be numbered consecutively. | |
| 523 long found = 0; | |
| 524 processorid_t next = 0; | |
| 525 while (found < *id_length && next < MAX_PROCESSOR_ID) { | |
| 526 processor_info_t info; | |
| 527 if (processor_info(next, &info) == 0) { | |
| 528 // NB, PI_NOINTR processors are effectively online ... | |
| 529 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { | |
| 530 (*id_array)[found] = next; | |
| 531 found += 1; | |
| 532 } | |
| 533 } | |
| 534 next += 1; | |
| 535 } | |
| 536 if (found < *id_length) { | |
| 537 // The loop above didn't identify the expected number of processors. | |
| 538 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) | |
| 539 // and re-running the loop, above, but there's no guarantee of progress | |
| 540 // if the system configuration is in flux. Instead, we just return what | |
| 541 // we've got. Note that in the worst case find_processors_online() could | |
| 542 // return an empty set. (As a fall-back in the case of the empty set we | |
| 543 // could just return the ID of the current processor). | |
| 544 *id_length = found ; | |
| 545 } | |
| 546 | |
| 547 return true; | |
| 548 } | |
| 549 | |
| 550 static bool assign_distribution(processorid_t* id_array, | |
| 551 uint id_length, | |
| 552 uint* distribution, | |
| 553 uint distribution_length) { | |
| 554 // We assume we can assign processorid_t's to uint's. | |
| 555 assert(sizeof(processorid_t) == sizeof(uint), | |
| 556 "can't convert processorid_t to uint"); | |
| 557 // Quick check to see if we won't succeed. | |
| 558 if (id_length < distribution_length) { | |
| 559 return false; | |
| 560 } | |
| 561 // Assign processor ids to the distribution. | |
| 562 // Try to shuffle processors to distribute work across boards, | |
| 563 // assuming 4 processors per board. | |
| 564 const uint processors_per_board = ProcessDistributionStride; | |
| 565 // Find the maximum processor id. | |
| 566 processorid_t max_id = 0; | |
| 567 for (uint m = 0; m < id_length; m += 1) { | |
| 568 max_id = MAX2(max_id, id_array[m]); | |
| 569 } | |
| 570 // The next id, to limit loops. | |
| 571 const processorid_t limit_id = max_id + 1; | |
| 572 // Make up markers for available processors. | |
| 573 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); | |
| 574 for (uint c = 0; c < limit_id; c += 1) { | |
| 575 available_id[c] = false; | |
| 576 } | |
| 577 for (uint a = 0; a < id_length; a += 1) { | |
| 578 available_id[id_array[a]] = true; | |
| 579 } | |
| 580 // Step by "boards", then by "slot", copying to "assigned". | |
| 581 // NEEDS_CLEANUP: The assignment of processors should be stateful, | |
| 582 // remembering which processors have been assigned by | |
| 583 // previous calls, etc., so as to distribute several | |
| 584 // independent calls of this method. What we'd like is | |
| 585 // It would be nice to have an API that let us ask | |
| 586 // how many processes are bound to a processor, | |
| 587 // but we don't have that, either. | |
| 588 // In the short term, "board" is static so that | |
| 589 // subsequent distributions don't all start at board 0. | |
| 590 static uint board = 0; | |
| 591 uint assigned = 0; | |
| 592 // Until we've found enough processors .... | |
| 593 while (assigned < distribution_length) { | |
| 594 // ... find the next available processor in the board. | |
| 595 for (uint slot = 0; slot < processors_per_board; slot += 1) { | |
| 596 uint try_id = board * processors_per_board + slot; | |
| 597 if ((try_id < limit_id) && (available_id[try_id] == true)) { | |
| 598 distribution[assigned] = try_id; | |
| 599 available_id[try_id] = false; | |
| 600 assigned += 1; | |
| 601 break; | |
| 602 } | |
| 603 } | |
| 604 board += 1; | |
| 605 if (board * processors_per_board + 0 >= limit_id) { | |
| 606 board = 0; | |
| 607 } | |
| 608 } | |
| 609 if (available_id != NULL) { | |
| 610 FREE_C_HEAP_ARRAY(bool, available_id); | |
| 611 } | |
| 612 return true; | |
| 613 } | |
| 614 | |
| 615 bool os::distribute_processes(uint length, uint* distribution) { | |
| 616 bool result = false; | |
| 617 // Find the processor id's of all the available CPUs. | |
| 618 processorid_t* id_array = NULL; | |
| 619 uint id_length = 0; | |
| 620 // There are some races between querying information and using it, | |
| 621 // since processor sets can change dynamically. | |
| 622 psetid_t pset = PS_NONE; | |
| 623 // Are we running in a processor set? | |
| 624 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { | |
| 625 result = find_processors_in_pset(pset, &id_array, &id_length); | |
| 626 } else { | |
| 627 result = find_processors_online(&id_array, &id_length); | |
| 628 } | |
| 629 if (result == true) { | |
| 630 if (id_length >= length) { | |
| 631 result = assign_distribution(id_array, id_length, distribution, length); | |
| 632 } else { | |
| 633 result = false; | |
| 634 } | |
| 635 } | |
| 636 if (id_array != NULL) { | |
| 637 FREE_C_HEAP_ARRAY(processorid_t, id_array); | |
| 638 } | |
| 639 return result; | |
| 640 } | |
| 641 | |
| 642 bool os::bind_to_processor(uint processor_id) { | |
| 643 // We assume that a processorid_t can be stored in a uint. | |
| 644 assert(sizeof(uint) == sizeof(processorid_t), | |
| 645 "can't convert uint to processorid_t"); | |
| 646 int bind_result = | |
| 647 processor_bind(P_LWPID, // bind LWP. | |
| 648 P_MYID, // bind current LWP. | |
| 649 (processorid_t) processor_id, // id. | |
| 650 NULL); // don't return old binding. | |
| 651 return (bind_result == 0); | |
| 652 } | |
| 653 | |
| 654 bool os::getenv(const char* name, char* buffer, int len) { | |
| 655 char* val = ::getenv( name ); | |
| 656 if ( val == NULL | |
| 657 || strlen(val) + 1 > len ) { | |
| 658 if (len > 0) buffer[0] = 0; // return a null string | |
| 659 return false; | |
| 660 } | |
| 661 strcpy( buffer, val ); | |
| 662 return true; | |
| 663 } | |
| 664 | |
| 665 | |
| 666 // Return true if user is running as root. | |
| 667 | |
| 668 bool os::have_special_privileges() { | |
| 669 static bool init = false; | |
| 670 static bool privileges = false; | |
| 671 if (!init) { | |
| 672 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
| 673 init = true; | |
| 674 } | |
| 675 return privileges; | |
| 676 } | |
| 677 | |
| 678 | |
| 679 static char* get_property(char* name, char* buffer, int buffer_size) { | |
| 680 if (os::getenv(name, buffer, buffer_size)) { | |
| 681 return buffer; | |
| 682 } | |
| 683 static char empty[] = ""; | |
| 684 return empty; | |
| 685 } | |
| 686 | |
| 687 | |
| 688 void os::init_system_properties_values() { | |
| 689 char arch[12]; | |
| 690 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); | |
| 691 | |
| 692 // The next steps are taken in the product version: | |
| 693 // | |
| 694 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. | |
| 695 // This library should be located at: | |
| 696 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. | |
| 697 // | |
| 698 // If "/jre/lib/" appears at the right place in the path, then we | |
| 699 // assume libjvm[_g].so is installed in a JDK and we use this path. | |
| 700 // | |
| 701 // Otherwise exit with message: "Could not create the Java virtual machine." | |
| 702 // | |
| 703 // The following extra steps are taken in the debugging version: | |
| 704 // | |
| 705 // If "/jre/lib/" does NOT appear at the right place in the path | |
| 706 // instead of exit check for $JAVA_HOME environment variable. | |
| 707 // | |
| 708 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, | |
| 709 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so | |
| 710 // it looks like libjvm[_g].so is installed there | |
| 711 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. | |
| 712 // | |
| 713 // Otherwise exit. | |
| 714 // | |
| 715 // Important note: if the location of libjvm.so changes this | |
| 716 // code needs to be changed accordingly. | |
| 717 | |
| 718 // The next few definitions allow the code to be verbatim: | |
| 719 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) | |
| 720 #define free(p) FREE_C_HEAP_ARRAY(char, p) | |
| 721 #define getenv(n) ::getenv(n) | |
| 722 | |
| 723 #define EXTENSIONS_DIR "/lib/ext" | |
| 724 #define ENDORSED_DIR "/lib/endorsed" | |
| 725 #define COMMON_DIR "/usr/jdk/packages" | |
| 726 | |
| 727 { | |
| 728 /* sysclasspath, java_home, dll_dir */ | |
| 729 { | |
| 730 char *home_path; | |
| 731 char *dll_path; | |
| 732 char *pslash; | |
| 733 char buf[MAXPATHLEN]; | |
| 734 os::jvm_path(buf, sizeof(buf)); | |
| 735 | |
| 736 // Found the full path to libjvm.so. | |
| 737 // Now cut the path to <java_home>/jre if we can. | |
| 738 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ | |
| 739 pslash = strrchr(buf, '/'); | |
| 740 if (pslash != NULL) | |
| 741 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ | |
| 742 dll_path = malloc(strlen(buf) + 1); | |
| 743 if (dll_path == NULL) | |
| 744 return; | |
| 745 strcpy(dll_path, buf); | |
| 746 Arguments::set_dll_dir(dll_path); | |
| 747 | |
| 748 if (pslash != NULL) { | |
| 749 pslash = strrchr(buf, '/'); | |
| 750 if (pslash != NULL) { | |
| 751 *pslash = '\0'; /* get rid of /<arch> */ | |
| 752 pslash = strrchr(buf, '/'); | |
| 753 if (pslash != NULL) | |
| 754 *pslash = '\0'; /* get rid of /lib */ | |
| 755 } | |
| 756 } | |
| 757 | |
| 758 home_path = malloc(strlen(buf) + 1); | |
| 759 if (home_path == NULL) | |
| 760 return; | |
| 761 strcpy(home_path, buf); | |
| 762 Arguments::set_java_home(home_path); | |
| 763 | |
| 764 if (!set_boot_path('/', ':')) | |
| 765 return; | |
| 766 } | |
| 767 | |
| 768 /* | |
| 769 * Where to look for native libraries | |
| 770 */ | |
| 771 { | |
| 772 // Use dlinfo() to determine the correct java.library.path. | |
| 773 // | |
| 774 // If we're launched by the Java launcher, and the user | |
| 775 // does not set java.library.path explicitly on the commandline, | |
| 776 // the Java launcher sets LD_LIBRARY_PATH for us and unsets | |
| 777 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case | |
| 778 // dlinfo returns LD_LIBRARY_PATH + crle settings (including | |
| 779 // /usr/lib), which is exactly what we want. | |
| 780 // | |
| 781 // If the user does set java.library.path, it completely | |
| 782 // overwrites this setting, and always has. | |
| 783 // | |
| 784 // If we're not launched by the Java launcher, we may | |
| 785 // get here with any/all of the LD_LIBRARY_PATH[_32|64] | |
| 786 // settings. Again, dlinfo does exactly what we want. | |
| 787 | |
| 788 Dl_serinfo _info, *info = &_info; | |
| 789 Dl_serpath *path; | |
| 790 char* library_path; | |
| 791 char *common_path; | |
| 792 int i; | |
| 793 | |
| 794 // determine search path count and required buffer size | |
| 795 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { | |
| 796 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); | |
| 797 } | |
| 798 | |
| 799 // allocate new buffer and initialize | |
| 800 info = (Dl_serinfo*)malloc(_info.dls_size); | |
| 801 if (info == NULL) { | |
| 802 vm_exit_out_of_memory(_info.dls_size, | |
| 803 "init_system_properties_values info"); | |
| 804 } | |
| 805 info->dls_size = _info.dls_size; | |
| 806 info->dls_cnt = _info.dls_cnt; | |
| 807 | |
| 808 // obtain search path information | |
| 809 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { | |
| 810 free(info); | |
| 811 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); | |
| 812 } | |
| 813 | |
| 814 path = &info->dls_serpath[0]; | |
| 815 | |
| 816 // Note: Due to a legacy implementation, most of the library path | |
| 817 // is set in the launcher. This was to accomodate linking restrictions | |
| 818 // on legacy Solaris implementations (which are no longer supported). | |
| 819 // Eventually, all the library path setting will be done here. | |
| 820 // | |
| 821 // However, to prevent the proliferation of improperly built native | |
| 822 // libraries, the new path component /usr/jdk/packages is added here. | |
| 823 | |
| 824 // Determine the actual CPU architecture. | |
| 825 char cpu_arch[12]; | |
| 826 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); | |
| 827 #ifdef _LP64 | |
| 828 // If we are a 64-bit vm, perform the following translations: | |
| 829 // sparc -> sparcv9 | |
| 830 // i386 -> amd64 | |
| 831 if (strcmp(cpu_arch, "sparc") == 0) | |
| 832 strcat(cpu_arch, "v9"); | |
| 833 else if (strcmp(cpu_arch, "i386") == 0) | |
| 834 strcpy(cpu_arch, "amd64"); | |
| 835 #endif | |
| 836 | |
| 837 // Construct the invariant part of ld_library_path. Note that the | |
| 838 // space for the colon and the trailing null are provided by the | |
| 839 // nulls included by the sizeof operator. | |
| 840 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); | |
| 841 common_path = malloc(bufsize); | |
| 842 if (common_path == NULL) { | |
| 843 free(info); | |
| 844 vm_exit_out_of_memory(bufsize, | |
| 845 "init_system_properties_values common_path"); | |
| 846 } | |
| 847 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); | |
| 848 | |
| 849 // struct size is more than sufficient for the path components obtained | |
| 850 // through the dlinfo() call, so only add additional space for the path | |
| 851 // components explicitly added here. | |
| 852 bufsize = info->dls_size + strlen(common_path); | |
| 853 library_path = malloc(bufsize); | |
| 854 if (library_path == NULL) { | |
| 855 free(info); | |
| 856 free(common_path); | |
| 857 vm_exit_out_of_memory(bufsize, | |
| 858 "init_system_properties_values library_path"); | |
| 859 } | |
| 860 library_path[0] = '\0'; | |
| 861 | |
| 862 // Construct the desired Java library path from the linker's library | |
| 863 // search path. | |
| 864 // | |
| 865 // For compatibility, it is optimal that we insert the additional path | |
| 866 // components specific to the Java VM after those components specified | |
| 867 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so | |
| 868 // infrastructure. | |
| 869 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it | |
| 870 strcpy(library_path, common_path); | |
| 871 } else { | |
| 872 int inserted = 0; | |
| 873 for (i = 0; i < info->dls_cnt; i++, path++) { | |
| 874 uint_t flags = path->dls_flags & LA_SER_MASK; | |
| 875 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { | |
| 876 strcat(library_path, common_path); | |
| 877 strcat(library_path, os::path_separator()); | |
| 878 inserted = 1; | |
| 879 } | |
| 880 strcat(library_path, path->dls_name); | |
| 881 strcat(library_path, os::path_separator()); | |
| 882 } | |
| 883 // eliminate trailing path separator | |
| 884 library_path[strlen(library_path)-1] = '\0'; | |
| 885 } | |
| 886 | |
| 887 // happens before argument parsing - can't use a trace flag | |
| 888 // tty->print_raw("init_system_properties_values: native lib path: "); | |
| 889 // tty->print_raw_cr(library_path); | |
| 890 | |
| 891 // callee copies into its own buffer | |
| 892 Arguments::set_library_path(library_path); | |
| 893 | |
| 894 free(common_path); | |
| 895 free(library_path); | |
| 896 free(info); | |
| 897 } | |
| 898 | |
| 899 /* | |
| 900 * Extensions directories. | |
| 901 * | |
| 902 * Note that the space for the colon and the trailing null are provided | |
| 903 * by the nulls included by the sizeof operator (so actually one byte more | |
| 904 * than necessary is allocated). | |
| 905 */ | |
| 906 { | |
| 907 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + | |
| 908 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + | |
| 909 sizeof(EXTENSIONS_DIR)); | |
| 910 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, | |
| 911 Arguments::get_java_home()); | |
| 912 Arguments::set_ext_dirs(buf); | |
| 913 } | |
| 914 | |
| 915 /* Endorsed standards default directory. */ | |
| 916 { | |
| 917 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); | |
| 918 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); | |
| 919 Arguments::set_endorsed_dirs(buf); | |
| 920 } | |
| 921 } | |
| 922 | |
| 923 #undef malloc | |
| 924 #undef free | |
| 925 #undef getenv | |
| 926 #undef EXTENSIONS_DIR | |
| 927 #undef ENDORSED_DIR | |
| 928 #undef COMMON_DIR | |
| 929 | |
| 930 } | |
| 931 | |
| 932 void os::breakpoint() { | |
| 933 BREAKPOINT; | |
| 934 } | |
| 935 | |
| 936 bool os::obsolete_option(const JavaVMOption *option) | |
| 937 { | |
| 938 if (!strncmp(option->optionString, "-Xt", 3)) { | |
| 939 return true; | |
| 940 } else if (!strncmp(option->optionString, "-Xtm", 4)) { | |
| 941 return true; | |
| 942 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { | |
| 943 return true; | |
| 944 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { | |
| 945 return true; | |
| 946 } | |
| 947 return false; | |
| 948 } | |
| 949 | |
| 950 bool os::Solaris::valid_stack_address(Thread* thread, address sp) { | |
| 951 address stackStart = (address)thread->stack_base(); | |
| 952 address stackEnd = (address)(stackStart - (address)thread->stack_size()); | |
| 953 if (sp < stackStart && sp >= stackEnd ) return true; | |
| 954 return false; | |
| 955 } | |
| 956 | |
| 957 extern "C" void breakpoint() { | |
| 958 // use debugger to set breakpoint here | |
| 959 } | |
| 960 | |
| 961 // Returns an estimate of the current stack pointer. Result must be guaranteed to | |
| 962 // point into the calling threads stack, and be no lower than the current stack | |
| 963 // pointer. | |
| 964 address os::current_stack_pointer() { | |
| 965 volatile int dummy; | |
| 966 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right | |
| 967 return sp; | |
| 968 } | |
| 969 | |
| 970 static thread_t main_thread; | |
| 971 | |
| 972 // Thread start routine for all new Java threads | |
| 973 extern "C" void* java_start(void* thread_addr) { | |
| 974 // Try to randomize the cache line index of hot stack frames. | |
| 975 // This helps when threads of the same stack traces evict each other's | |
| 976 // cache lines. The threads can be either from the same JVM instance, or | |
| 977 // from different JVM instances. The benefit is especially true for | |
| 978 // processors with hyperthreading technology. | |
| 979 static int counter = 0; | |
| 980 int pid = os::current_process_id(); | |
| 981 alloca(((pid ^ counter++) & 7) * 128); | |
| 982 | |
| 983 int prio; | |
| 984 Thread* thread = (Thread*)thread_addr; | |
| 985 OSThread* osthr = thread->osthread(); | |
| 986 | |
| 987 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound | |
| 988 thread->_schedctl = (void *) schedctl_init () ; | |
| 989 | |
| 990 if (UseNUMA) { | |
| 991 int lgrp_id = os::numa_get_group_id(); | |
| 992 if (lgrp_id != -1) { | |
| 993 thread->set_lgrp_id(lgrp_id); | |
| 994 } | |
| 995 } | |
| 996 | |
| 997 // If the creator called set priority before we started, | |
| 998 // we need to call set priority now that we have an lwp. | |
| 999 // Get the priority from libthread and set the priority | |
| 1000 // for the new Solaris lwp. | |
| 1001 if ( osthr->thread_id() != -1 ) { | |
| 1002 if ( UseThreadPriorities ) { | |
| 1003 thr_getprio(osthr->thread_id(), &prio); | |
| 1004 if (ThreadPriorityVerbose) { | |
| 1005 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", | |
| 1006 osthr->thread_id(), osthr->lwp_id(), prio ); | |
| 1007 } | |
| 1008 os::set_native_priority(thread, prio); | |
| 1009 } | |
| 1010 } else if (ThreadPriorityVerbose) { | |
| 1011 warning("Can't set priority in _start routine, thread id hasn't been set\n"); | |
| 1012 } | |
| 1013 | |
| 1014 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); | |
| 1015 | |
| 1016 // initialize signal mask for this thread | |
| 1017 os::Solaris::hotspot_sigmask(thread); | |
| 1018 | |
| 1019 thread->run(); | |
| 1020 | |
| 1021 // One less thread is executing | |
| 1022 // When the VMThread gets here, the main thread may have already exited | |
| 1023 // which frees the CodeHeap containing the Atomic::dec code | |
| 1024 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { | |
| 1025 Atomic::dec(&os::Solaris::_os_thread_count); | |
| 1026 } | |
| 1027 | |
| 1028 if (UseDetachedThreads) { | |
| 1029 thr_exit(NULL); | |
| 1030 ShouldNotReachHere(); | |
| 1031 } | |
| 1032 return NULL; | |
| 1033 } | |
| 1034 | |
| 1035 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { | |
| 1036 // Allocate the OSThread object | |
| 1037 OSThread* osthread = new OSThread(NULL, NULL); | |
| 1038 if (osthread == NULL) return NULL; | |
| 1039 | |
| 1040 // Store info on the Solaris thread into the OSThread | |
| 1041 osthread->set_thread_id(thread_id); | |
| 1042 osthread->set_lwp_id(_lwp_self()); | |
| 1043 thread->_schedctl = (void *) schedctl_init () ; | |
| 1044 | |
| 1045 if (UseNUMA) { | |
| 1046 int lgrp_id = os::numa_get_group_id(); | |
| 1047 if (lgrp_id != -1) { | |
| 1048 thread->set_lgrp_id(lgrp_id); | |
| 1049 } | |
| 1050 } | |
| 1051 | |
| 1052 if ( ThreadPriorityVerbose ) { | |
| 1053 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", | |
| 1054 osthread->thread_id(), osthread->lwp_id() ); | |
| 1055 } | |
| 1056 | |
| 1057 // Initial thread state is INITIALIZED, not SUSPENDED | |
| 1058 osthread->set_state(INITIALIZED); | |
| 1059 | |
| 1060 return osthread; | |
| 1061 } | |
| 1062 | |
| 1063 void os::Solaris::hotspot_sigmask(Thread* thread) { | |
| 1064 | |
| 1065 //Save caller's signal mask | |
| 1066 sigset_t sigmask; | |
| 1067 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); | |
| 1068 OSThread *osthread = thread->osthread(); | |
| 1069 osthread->set_caller_sigmask(sigmask); | |
| 1070 | |
| 1071 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); | |
| 1072 if (!ReduceSignalUsage) { | |
| 1073 if (thread->is_VM_thread()) { | |
| 1074 // Only the VM thread handles BREAK_SIGNAL ... | |
| 1075 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); | |
| 1076 } else { | |
| 1077 // ... all other threads block BREAK_SIGNAL | |
| 1078 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); | |
| 1079 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); | |
| 1080 } | |
| 1081 } | |
| 1082 } | |
| 1083 | |
| 1084 bool os::create_attached_thread(JavaThread* thread) { | |
| 1085 #ifdef ASSERT | |
| 1086 thread->verify_not_published(); | |
| 1087 #endif | |
| 1088 OSThread* osthread = create_os_thread(thread, thr_self()); | |
| 1089 if (osthread == NULL) { | |
| 1090 return false; | |
| 1091 } | |
| 1092 | |
| 1093 // Initial thread state is RUNNABLE | |
| 1094 osthread->set_state(RUNNABLE); | |
| 1095 thread->set_osthread(osthread); | |
| 1096 | |
| 1097 // initialize signal mask for this thread | |
| 1098 // and save the caller's signal mask | |
| 1099 os::Solaris::hotspot_sigmask(thread); | |
| 1100 | |
| 1101 return true; | |
| 1102 } | |
| 1103 | |
| 1104 bool os::create_main_thread(JavaThread* thread) { | |
| 1105 #ifdef ASSERT | |
| 1106 thread->verify_not_published(); | |
| 1107 #endif | |
| 1108 if (_starting_thread == NULL) { | |
| 1109 _starting_thread = create_os_thread(thread, main_thread); | |
| 1110 if (_starting_thread == NULL) { | |
| 1111 return false; | |
| 1112 } | |
| 1113 } | |
| 1114 | |
| 1115 // The primodial thread is runnable from the start | |
| 1116 _starting_thread->set_state(RUNNABLE); | |
| 1117 | |
| 1118 thread->set_osthread(_starting_thread); | |
| 1119 | |
| 1120 // initialize signal mask for this thread | |
| 1121 // and save the caller's signal mask | |
| 1122 os::Solaris::hotspot_sigmask(thread); | |
| 1123 | |
| 1124 return true; | |
| 1125 } | |
| 1126 | |
| 1127 // _T2_libthread is true if we believe we are running with the newer | |
| 1128 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default) | |
| 1129 bool os::Solaris::_T2_libthread = false; | |
| 1130 | |
| 1131 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
| 1132 // Allocate the OSThread object | |
| 1133 OSThread* osthread = new OSThread(NULL, NULL); | |
| 1134 if (osthread == NULL) { | |
| 1135 return false; | |
| 1136 } | |
| 1137 | |
| 1138 if ( ThreadPriorityVerbose ) { | |
| 1139 char *thrtyp; | |
| 1140 switch ( thr_type ) { | |
| 1141 case vm_thread: | |
| 1142 thrtyp = (char *)"vm"; | |
| 1143 break; | |
| 1144 case cgc_thread: | |
| 1145 thrtyp = (char *)"cgc"; | |
| 1146 break; | |
| 1147 case pgc_thread: | |
| 1148 thrtyp = (char *)"pgc"; | |
| 1149 break; | |
| 1150 case java_thread: | |
| 1151 thrtyp = (char *)"java"; | |
| 1152 break; | |
| 1153 case compiler_thread: | |
| 1154 thrtyp = (char *)"compiler"; | |
| 1155 break; | |
| 1156 case watcher_thread: | |
| 1157 thrtyp = (char *)"watcher"; | |
| 1158 break; | |
| 1159 default: | |
| 1160 thrtyp = (char *)"unknown"; | |
| 1161 break; | |
| 1162 } | |
| 1163 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); | |
| 1164 } | |
| 1165 | |
| 1166 // Calculate stack size if it's not specified by caller. | |
| 1167 if (stack_size == 0) { | |
| 1168 // The default stack size 1M (2M for LP64). | |
| 1169 stack_size = (BytesPerWord >> 2) * K * K; | |
| 1170 | |
| 1171 switch (thr_type) { | |
| 1172 case os::java_thread: | |
| 1173 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss | |
| 1174 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); | |
| 1175 break; | |
| 1176 case os::compiler_thread: | |
| 1177 if (CompilerThreadStackSize > 0) { | |
| 1178 stack_size = (size_t)(CompilerThreadStackSize * K); | |
| 1179 break; | |
| 1180 } // else fall through: | |
| 1181 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
| 1182 case os::vm_thread: | |
| 1183 case os::pgc_thread: | |
| 1184 case os::cgc_thread: | |
| 1185 case os::watcher_thread: | |
| 1186 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
| 1187 break; | |
| 1188 } | |
| 1189 } | |
| 1190 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); | |
| 1191 | |
| 1192 // Initial state is ALLOCATED but not INITIALIZED | |
| 1193 osthread->set_state(ALLOCATED); | |
| 1194 | |
| 1195 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { | |
| 1196 // We got lots of threads. Check if we still have some address space left. | |
| 1197 // Need to be at least 5Mb of unreserved address space. We do check by | |
| 1198 // trying to reserve some. | |
| 1199 const size_t VirtualMemoryBangSize = 20*K*K; | |
| 1200 char* mem = os::reserve_memory(VirtualMemoryBangSize); | |
| 1201 if (mem == NULL) { | |
| 1202 delete osthread; | |
| 1203 return false; | |
| 1204 } else { | |
| 1205 // Release the memory again | |
| 1206 os::release_memory(mem, VirtualMemoryBangSize); | |
| 1207 } | |
| 1208 } | |
| 1209 | |
| 1210 // Setup osthread because the child thread may need it. | |
| 1211 thread->set_osthread(osthread); | |
| 1212 | |
| 1213 // Create the Solaris thread | |
| 1214 // explicit THR_BOUND for T2_libthread case in case | |
| 1215 // that assumption is not accurate, but our alternate signal stack | |
| 1216 // handling is based on it which must have bound threads | |
| 1217 thread_t tid = 0; | |
| 1218 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED | |
| 1219 | ((UseBoundThreads || os::Solaris::T2_libthread() || | |
| 1220 (thr_type == vm_thread) || | |
| 1221 (thr_type == cgc_thread) || | |
| 1222 (thr_type == pgc_thread) || | |
| 1223 (thr_type == compiler_thread && BackgroundCompilation)) ? | |
| 1224 THR_BOUND : 0); | |
| 1225 int status; | |
| 1226 | |
| 1227 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. | |
| 1228 // | |
| 1229 // On multiprocessors systems, libthread sometimes under-provisions our | |
| 1230 // process with LWPs. On a 30-way systems, for instance, we could have | |
| 1231 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned | |
| 1232 // to our process. This can result in under utilization of PEs. | |
| 1233 // I suspect the problem is related to libthread's LWP | |
| 1234 // pool management and to the kernel's SIGBLOCKING "last LWP parked" | |
| 1235 // upcall policy. | |
| 1236 // | |
| 1237 // The following code is palliative -- it attempts to ensure that our | |
| 1238 // process has sufficient LWPs to take advantage of multiple PEs. | |
| 1239 // Proper long-term cures include using user-level threads bound to LWPs | |
| 1240 // (THR_BOUND) or using LWP-based synchronization. Note that there is a | |
| 1241 // slight timing window with respect to sampling _os_thread_count, but | |
| 1242 // the race is benign. Also, we should periodically recompute | |
| 1243 // _processors_online as the min of SC_NPROCESSORS_ONLN and the | |
| 1244 // the number of PEs in our partition. You might be tempted to use | |
| 1245 // THR_NEW_LWP here, but I'd recommend against it as that could | |
| 1246 // result in undesirable growth of the libthread's LWP pool. | |
| 1247 // The fix below isn't sufficient; for instance, it doesn't take into count | |
| 1248 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. | |
| 1249 // | |
| 1250 // Some pathologies this scheme doesn't handle: | |
| 1251 // * Threads can block, releasing the LWPs. The LWPs can age out. | |
| 1252 // When a large number of threads become ready again there aren't | |
| 1253 // enough LWPs available to service them. This can occur when the | |
| 1254 // number of ready threads oscillates. | |
| 1255 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. | |
| 1256 // | |
| 1257 // Finally, we should call thr_setconcurrency() periodically to refresh | |
| 1258 // the LWP pool and thwart the LWP age-out mechanism. | |
| 1259 // The "+3" term provides a little slop -- we want to slightly overprovision. | |
| 1260 | |
| 1261 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { | |
| 1262 if (!(flags & THR_BOUND)) { | |
| 1263 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation | |
| 1264 } | |
| 1265 } | |
| 1266 // Although this doesn't hurt, we should warn of undefined behavior | |
| 1267 // when using unbound T1 threads with schedctl(). This should never | |
| 1268 // happen, as the compiler and VM threads are always created bound | |
| 1269 DEBUG_ONLY( | |
| 1270 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && | |
| 1271 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && | |
| 1272 ((thr_type == vm_thread) || (thr_type == cgc_thread) || | |
| 1273 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { | |
| 1274 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); | |
| 1275 } | |
| 1276 ); | |
| 1277 | |
| 1278 | |
| 1279 // Mark that we don't have an lwp or thread id yet. | |
| 1280 // In case we attempt to set the priority before the thread starts. | |
| 1281 osthread->set_lwp_id(-1); | |
| 1282 osthread->set_thread_id(-1); | |
| 1283 | |
| 1284 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); | |
| 1285 if (status != 0) { | |
| 1286 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1287 perror("os::create_thread"); | |
| 1288 } | |
| 1289 thread->set_osthread(NULL); | |
| 1290 // Need to clean up stuff we've allocated so far | |
| 1291 delete osthread; | |
| 1292 return false; | |
| 1293 } | |
| 1294 | |
| 1295 Atomic::inc(&os::Solaris::_os_thread_count); | |
| 1296 | |
| 1297 // Store info on the Solaris thread into the OSThread | |
| 1298 osthread->set_thread_id(tid); | |
| 1299 | |
| 1300 // Remember that we created this thread so we can set priority on it | |
| 1301 osthread->set_vm_created(); | |
| 1302 | |
| 1303 // Set the default thread priority otherwise use NormalPriority | |
| 1304 | |
| 1305 if ( UseThreadPriorities ) { | |
| 1306 thr_setprio(tid, (DefaultThreadPriority == -1) ? | |
| 1307 java_to_os_priority[NormPriority] : | |
| 1308 DefaultThreadPriority); | |
| 1309 } | |
| 1310 | |
| 1311 // Initial thread state is INITIALIZED, not SUSPENDED | |
| 1312 osthread->set_state(INITIALIZED); | |
| 1313 | |
| 1314 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain | |
| 1315 return true; | |
| 1316 } | |
| 1317 | |
| 1318 /* defined for >= Solaris 10. This allows builds on earlier versions | |
| 1319 * of Solaris to take advantage of the newly reserved Solaris JVM signals | |
| 1320 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 | |
| 1321 * and -XX:+UseAltSigs does nothing since these should have no conflict | |
| 1322 */ | |
| 1323 #if !defined(SIGJVM1) | |
| 1324 #define SIGJVM1 39 | |
| 1325 #define SIGJVM2 40 | |
| 1326 #endif | |
| 1327 | |
| 1328 debug_only(static bool signal_sets_initialized = false); | |
| 1329 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
| 1330 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; | |
| 1331 int os::Solaris::_SIGasync = ASYNC_SIGNAL; | |
| 1332 | |
| 1333 bool os::Solaris::is_sig_ignored(int sig) { | |
| 1334 struct sigaction oact; | |
| 1335 sigaction(sig, (struct sigaction*)NULL, &oact); | |
| 1336 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
| 1337 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
| 1338 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
| 1339 return true; | |
| 1340 else | |
| 1341 return false; | |
| 1342 } | |
| 1343 | |
| 1344 // Note: SIGRTMIN is a macro that calls sysconf() so it will | |
| 1345 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime | |
| 1346 static bool isJVM1available() { | |
| 1347 return SIGJVM1 < SIGRTMIN; | |
| 1348 } | |
| 1349 | |
| 1350 void os::Solaris::signal_sets_init() { | |
| 1351 // Should also have an assertion stating we are still single-threaded. | |
| 1352 assert(!signal_sets_initialized, "Already initialized"); | |
| 1353 // Fill in signals that are necessarily unblocked for all threads in | |
| 1354 // the VM. Currently, we unblock the following signals: | |
| 1355 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
| 1356 // by -Xrs (=ReduceSignalUsage)); | |
| 1357 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
| 1358 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
| 1359 // the dispositions or masks wrt these signals. | |
| 1360 // Programs embedding the VM that want to use the above signals for their | |
| 1361 // own purposes must, at this time, use the "-Xrs" option to prevent | |
| 1362 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
| 1363 // (See bug 4345157, and other related bugs). | |
| 1364 // In reality, though, unblocking these signals is really a nop, since | |
| 1365 // these signals are not blocked by default. | |
| 1366 sigemptyset(&unblocked_sigs); | |
| 1367 sigemptyset(&allowdebug_blocked_sigs); | |
| 1368 sigaddset(&unblocked_sigs, SIGILL); | |
| 1369 sigaddset(&unblocked_sigs, SIGSEGV); | |
| 1370 sigaddset(&unblocked_sigs, SIGBUS); | |
| 1371 sigaddset(&unblocked_sigs, SIGFPE); | |
| 1372 | |
| 1373 if (isJVM1available) { | |
| 1374 os::Solaris::set_SIGinterrupt(SIGJVM1); | |
| 1375 os::Solaris::set_SIGasync(SIGJVM2); | |
| 1376 } else if (UseAltSigs) { | |
| 1377 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); | |
| 1378 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); | |
| 1379 } else { | |
| 1380 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); | |
| 1381 os::Solaris::set_SIGasync(ASYNC_SIGNAL); | |
| 1382 } | |
| 1383 | |
| 1384 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); | |
| 1385 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); | |
| 1386 | |
| 1387 if (!ReduceSignalUsage) { | |
| 1388 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
| 1389 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
| 1390 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
| 1391 } | |
| 1392 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
| 1393 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
| 1394 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
| 1395 } | |
| 1396 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
| 1397 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
| 1398 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
| 1399 } | |
| 1400 } | |
| 1401 // Fill in signals that are blocked by all but the VM thread. | |
| 1402 sigemptyset(&vm_sigs); | |
| 1403 if (!ReduceSignalUsage) | |
| 1404 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
| 1405 debug_only(signal_sets_initialized = true); | |
| 1406 | |
| 1407 // For diagnostics only used in run_periodic_checks | |
| 1408 sigemptyset(&check_signal_done); | |
| 1409 } | |
| 1410 | |
| 1411 // These are signals that are unblocked while a thread is running Java. | |
| 1412 // (For some reason, they get blocked by default.) | |
| 1413 sigset_t* os::Solaris::unblocked_signals() { | |
| 1414 assert(signal_sets_initialized, "Not initialized"); | |
| 1415 return &unblocked_sigs; | |
| 1416 } | |
| 1417 | |
| 1418 // These are the signals that are blocked while a (non-VM) thread is | |
| 1419 // running Java. Only the VM thread handles these signals. | |
| 1420 sigset_t* os::Solaris::vm_signals() { | |
| 1421 assert(signal_sets_initialized, "Not initialized"); | |
| 1422 return &vm_sigs; | |
| 1423 } | |
| 1424 | |
| 1425 // These are signals that are blocked during cond_wait to allow debugger in | |
| 1426 sigset_t* os::Solaris::allowdebug_blocked_signals() { | |
| 1427 assert(signal_sets_initialized, "Not initialized"); | |
| 1428 return &allowdebug_blocked_sigs; | |
| 1429 } | |
| 1430 | |
| 1431 // First crack at OS-specific initialization, from inside the new thread. | |
| 1432 void os::initialize_thread() { | |
| 1433 int r = thr_main() ; | |
| 1434 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; | |
| 1435 if (r) { | |
| 1436 JavaThread* jt = (JavaThread *)Thread::current(); | |
| 1437 assert(jt != NULL,"Sanity check"); | |
| 1438 size_t stack_size; | |
| 1439 address base = jt->stack_base(); | |
| 1440 if (Arguments::created_by_java_launcher()) { | |
| 1441 // Use 2MB to allow for Solaris 7 64 bit mode. | |
| 1442 stack_size = JavaThread::stack_size_at_create() == 0 | |
| 1443 ? 2048*K : JavaThread::stack_size_at_create(); | |
| 1444 | |
| 1445 // There are rare cases when we may have already used more than | |
| 1446 // the basic stack size allotment before this method is invoked. | |
| 1447 // Attempt to allow for a normally sized java_stack. | |
| 1448 size_t current_stack_offset = (size_t)(base - (address)&stack_size); | |
| 1449 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); | |
| 1450 } else { | |
| 1451 // 6269555: If we were not created by a Java launcher, i.e. if we are | |
| 1452 // running embedded in a native application, treat the primordial thread | |
| 1453 // as much like a native attached thread as possible. This means using | |
| 1454 // the current stack size from thr_stksegment(), unless it is too large | |
| 1455 // to reliably setup guard pages. A reasonable max size is 8MB. | |
| 1456 size_t current_size = current_stack_size(); | |
| 1457 // This should never happen, but just in case.... | |
| 1458 if (current_size == 0) current_size = 2 * K * K; | |
| 1459 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; | |
| 1460 } | |
| 1461 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; | |
| 1462 stack_size = (size_t)(base - bottom); | |
| 1463 | |
| 1464 assert(stack_size > 0, "Stack size calculation problem"); | |
| 1465 | |
| 1466 if (stack_size > jt->stack_size()) { | |
| 1467 NOT_PRODUCT( | |
| 1468 struct rlimit limits; | |
| 1469 getrlimit(RLIMIT_STACK, &limits); | |
| 1470 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); | |
| 1471 assert(size >= jt->stack_size(), "Stack size problem in main thread"); | |
| 1472 ) | |
| 1473 tty->print_cr( | |
| 1474 "Stack size of %d Kb exceeds current limit of %d Kb.\n" | |
| 1475 "(Stack sizes are rounded up to a multiple of the system page size.)\n" | |
| 1476 "See limit(1) to increase the stack size limit.", | |
| 1477 stack_size / K, jt->stack_size() / K); | |
| 1478 vm_exit(1); | |
| 1479 } | |
| 1480 assert(jt->stack_size() >= stack_size, | |
| 1481 "Attempt to map more stack than was allocated"); | |
| 1482 jt->set_stack_size(stack_size); | |
| 1483 } | |
| 1484 | |
| 1485 // 5/22/01: Right now alternate signal stacks do not handle | |
| 1486 // throwing stack overflow exceptions, see bug 4463178 | |
| 1487 // Until a fix is found for this, T2 will NOT imply alternate signal | |
| 1488 // stacks. | |
| 1489 // If using T2 libthread threads, install an alternate signal stack. | |
| 1490 // Because alternate stacks associate with LWPs on Solaris, | |
| 1491 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads | |
| 1492 // we prefer to explicitly stack bang. | |
| 1493 // If not using T2 libthread, but using UseBoundThreads any threads | |
| 1494 // (primordial thread, jni_attachCurrentThread) we do not create, | |
| 1495 // probably are not bound, therefore they can not have an alternate | |
| 1496 // signal stack. Since our stack banging code is generated and | |
| 1497 // is shared across threads, all threads must be bound to allow | |
| 1498 // using alternate signal stacks. The alternative is to interpose | |
| 1499 // on _lwp_create to associate an alt sig stack with each LWP, | |
| 1500 // and this could be a problem when the JVM is embedded. | |
| 1501 // We would prefer to use alternate signal stacks with T2 | |
| 1502 // Since there is currently no accurate way to detect T2 | |
| 1503 // we do not. Assuming T2 when running T1 causes sig 11s or assertions | |
| 1504 // on installing alternate signal stacks | |
| 1505 | |
| 1506 | |
| 1507 // 05/09/03: removed alternate signal stack support for Solaris | |
| 1508 // The alternate signal stack mechanism is no longer needed to | |
| 1509 // handle stack overflow. This is now handled by allocating | |
| 1510 // guard pages (red zone) and stackbanging. | |
| 1511 // Initially the alternate signal stack mechanism was removed because | |
| 1512 // it did not work with T1 llibthread. Alternate | |
| 1513 // signal stacks MUST have all threads bound to lwps. Applications | |
| 1514 // can create their own threads and attach them without their being | |
| 1515 // bound under T1. This is frequently the case for the primordial thread. | |
| 1516 // If we were ever to reenable this mechanism we would need to | |
| 1517 // use the dynamic check for T2 libthread. | |
| 1518 | |
| 1519 os::Solaris::init_thread_fpu_state(); | |
| 1520 } | |
| 1521 | |
| 1522 | |
| 1523 | |
| 1524 // Free Solaris resources related to the OSThread | |
| 1525 void os::free_thread(OSThread* osthread) { | |
| 1526 assert(osthread != NULL, "os::free_thread but osthread not set"); | |
| 1527 | |
| 1528 | |
| 1529 // We are told to free resources of the argument thread, | |
| 1530 // but we can only really operate on the current thread. | |
| 1531 // The main thread must take the VMThread down synchronously | |
| 1532 // before the main thread exits and frees up CodeHeap | |
| 1533 guarantee((Thread::current()->osthread() == osthread | |
| 1534 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); | |
| 1535 if (Thread::current()->osthread() == osthread) { | |
| 1536 // Restore caller's signal mask | |
| 1537 sigset_t sigmask = osthread->caller_sigmask(); | |
| 1538 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); | |
| 1539 } | |
| 1540 delete osthread; | |
| 1541 } | |
| 1542 | |
| 1543 void os::pd_start_thread(Thread* thread) { | |
| 1544 int status = thr_continue(thread->osthread()->thread_id()); | |
| 1545 assert_status(status == 0, status, "thr_continue failed"); | |
| 1546 } | |
| 1547 | |
| 1548 | |
| 1549 intx os::current_thread_id() { | |
| 1550 return (intx)thr_self(); | |
| 1551 } | |
| 1552 | |
| 1553 static pid_t _initial_pid = 0; | |
| 1554 | |
| 1555 int os::current_process_id() { | |
| 1556 return (int)(_initial_pid ? _initial_pid : getpid()); | |
| 1557 } | |
| 1558 | |
| 1559 int os::allocate_thread_local_storage() { | |
| 1560 // %%% in Win32 this allocates a memory segment pointed to by a | |
| 1561 // register. Dan Stein can implement a similar feature in | |
| 1562 // Solaris. Alternatively, the VM can do the same thing | |
| 1563 // explicitly: malloc some storage and keep the pointer in a | |
| 1564 // register (which is part of the thread's context) (or keep it | |
| 1565 // in TLS). | |
| 1566 // %%% In current versions of Solaris, thr_self and TSD can | |
| 1567 // be accessed via short sequences of displaced indirections. | |
| 1568 // The value of thr_self is available as %g7(36). | |
| 1569 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), | |
| 1570 // assuming that the current thread already has a value bound to k. | |
| 1571 // It may be worth experimenting with such access patterns, | |
| 1572 // and later having the parameters formally exported from a Solaris | |
| 1573 // interface. I think, however, that it will be faster to | |
| 1574 // maintain the invariant that %g2 always contains the | |
| 1575 // JavaThread in Java code, and have stubs simply | |
| 1576 // treat %g2 as a caller-save register, preserving it in a %lN. | |
| 1577 thread_key_t tk; | |
| 1578 if (thr_keycreate( &tk, NULL ) ) | |
| 1579 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); | |
| 1580 return int(tk); | |
| 1581 } | |
| 1582 | |
| 1583 void os::free_thread_local_storage(int index) { | |
| 1584 // %%% don't think we need anything here | |
| 1585 // if ( pthread_key_delete((pthread_key_t) tk) ) | |
| 1586 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); | |
| 1587 } | |
| 1588 | |
| 1589 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific | |
| 1590 // small number - point is NO swap space available | |
| 1591 void os::thread_local_storage_at_put(int index, void* value) { | |
| 1592 // %%% this is used only in threadLocalStorage.cpp | |
| 1593 if (thr_setspecific((thread_key_t)index, value)) { | |
| 1594 if (errno == ENOMEM) { | |
| 1595 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); | |
| 1596 } else { | |
| 1597 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); | |
| 1598 } | |
| 1599 } else { | |
| 1600 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; | |
| 1601 } | |
| 1602 } | |
| 1603 | |
| 1604 // This function could be called before TLS is initialized, for example, when | |
| 1605 // VM receives an async signal or when VM causes a fatal error during | |
| 1606 // initialization. Return NULL if thr_getspecific() fails. | |
| 1607 void* os::thread_local_storage_at(int index) { | |
| 1608 // %%% this is used only in threadLocalStorage.cpp | |
| 1609 void* r = NULL; | |
| 1610 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; | |
| 1611 } | |
| 1612 | |
| 1613 | |
| 1614 const int NANOSECS_PER_MILLISECS = 1000000; | |
| 1615 // gethrtime can move backwards if read from one cpu and then a different cpu | |
| 1616 // getTimeNanos is guaranteed to not move backward on Solaris | |
| 1617 // local spinloop created as faster for a CAS on an int than | |
| 1618 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not | |
| 1619 // supported on sparc v8 or pre supports_cx8 intel boxes. | |
| 1620 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong | |
| 1621 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes | |
| 1622 inline hrtime_t oldgetTimeNanos() { | |
| 1623 int gotlock = LOCK_INVALID; | |
| 1624 hrtime_t newtime = gethrtime(); | |
| 1625 | |
| 1626 for (;;) { | |
| 1627 // grab lock for max_hrtime | |
| 1628 int curlock = max_hrtime_lock; | |
| 1629 if (curlock & LOCK_BUSY) continue; | |
| 1630 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; | |
| 1631 if (newtime > max_hrtime) { | |
| 1632 max_hrtime = newtime; | |
| 1633 } else { | |
| 1634 newtime = max_hrtime; | |
| 1635 } | |
| 1636 // release lock | |
| 1637 max_hrtime_lock = LOCK_FREE; | |
| 1638 return newtime; | |
| 1639 } | |
| 1640 } | |
| 1641 // gethrtime can move backwards if read from one cpu and then a different cpu | |
| 1642 // getTimeNanos is guaranteed to not move backward on Solaris | |
| 1643 inline hrtime_t getTimeNanos() { | |
| 1644 if (VM_Version::supports_cx8()) { | |
| 499 | 1645 const hrtime_t now = gethrtime(); |
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1646 // Use atomic long load since 32-bit x86 uses 2 registers to keep long. |
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1647 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime); |
| 499 | 1648 if (now <= prev) return prev; // same or retrograde time; |
| 1649 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); | |
| 1650 assert(obsv >= prev, "invariant"); // Monotonicity | |
| 1651 // If the CAS succeeded then we're done and return "now". | |
| 1652 // If the CAS failed and the observed value "obs" is >= now then | |
| 1653 // we should return "obs". If the CAS failed and now > obs > prv then | |
| 1654 // some other thread raced this thread and installed a new value, in which case | |
| 1655 // we could either (a) retry the entire operation, (b) retry trying to install now | |
| 1656 // or (c) just return obs. We use (c). No loop is required although in some cases | |
| 1657 // we might discard a higher "now" value in deference to a slightly lower but freshly | |
| 1658 // installed obs value. That's entirely benign -- it admits no new orderings compared | |
| 1659 // to (a) or (b) -- and greatly reduces coherence traffic. | |
| 1660 // We might also condition (c) on the magnitude of the delta between obs and now. | |
| 1661 // Avoiding excessive CAS operations to hot RW locations is critical. | |
| 1662 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate | |
| 1663 return (prev == obsv) ? now : obsv ; | |
| 0 | 1664 } else { |
| 1665 return oldgetTimeNanos(); | |
| 1666 } | |
| 1667 } | |
| 1668 | |
| 1669 // Time since start-up in seconds to a fine granularity. | |
| 1670 // Used by VMSelfDestructTimer and the MemProfiler. | |
| 1671 double os::elapsedTime() { | |
| 1672 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; | |
| 1673 } | |
| 1674 | |
| 1675 jlong os::elapsed_counter() { | |
| 1676 return (jlong)(getTimeNanos() - first_hrtime); | |
| 1677 } | |
| 1678 | |
| 1679 jlong os::elapsed_frequency() { | |
| 1680 return hrtime_hz; | |
| 1681 } | |
| 1682 | |
| 1683 // Return the real, user, and system times in seconds from an | |
| 1684 // arbitrary fixed point in the past. | |
| 1685 bool os::getTimesSecs(double* process_real_time, | |
| 1686 double* process_user_time, | |
| 1687 double* process_system_time) { | |
| 1688 struct tms ticks; | |
| 1689 clock_t real_ticks = times(&ticks); | |
| 1690 | |
| 1691 if (real_ticks == (clock_t) (-1)) { | |
| 1692 return false; | |
| 1693 } else { | |
| 1694 double ticks_per_second = (double) clock_tics_per_sec; | |
| 1695 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
| 1696 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
| 1697 // For consistency return the real time from getTimeNanos() | |
| 1698 // converted to seconds. | |
| 1699 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); | |
| 1700 | |
| 1701 return true; | |
| 1702 } | |
| 1703 } | |
| 1704 | |
|
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1705 bool os::supports_vtime() { return true; } |
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1706 |
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1707 bool os::enable_vtime() { |
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1708 int fd = open("/proc/self/ctl", O_WRONLY); |
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1709 if (fd == -1) |
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1710 return false; |
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1711 |
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1712 long cmd[] = { PCSET, PR_MSACCT }; |
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1713 int res = write(fd, cmd, sizeof(long) * 2); |
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1714 close(fd); |
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1715 if (res != sizeof(long) * 2) |
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1716 return false; |
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1717 |
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1718 return true; |
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1719 } |
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1720 |
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1721 bool os::vtime_enabled() { |
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1722 int fd = open("/proc/self/status", O_RDONLY); |
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1723 if (fd == -1) |
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1724 return false; |
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1725 |
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1726 pstatus_t status; |
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1727 int res = read(fd, (void*) &status, sizeof(pstatus_t)); |
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1728 close(fd); |
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1729 if (res != sizeof(pstatus_t)) |
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1730 return false; |
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1731 |
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1732 return status.pr_flags & PR_MSACCT; |
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1733 } |
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1734 |
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1735 double os::elapsedVTime() { |
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1736 return (double)gethrvtime() / (double)hrtime_hz; |
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1737 } |
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1738 |
| 0 | 1739 // Used internally for comparisons only |
| 1740 // getTimeMillis guaranteed to not move backwards on Solaris | |
| 1741 jlong getTimeMillis() { | |
| 1742 jlong nanotime = getTimeNanos(); | |
| 1743 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); | |
| 1744 } | |
| 1745 | |
| 61 | 1746 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis |
| 1747 jlong os::javaTimeMillis() { | |
| 0 | 1748 timeval t; |
| 1749 if (gettimeofday( &t, NULL) == -1) | |
| 61 | 1750 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); |
| 0 | 1751 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; |
| 1752 } | |
| 1753 | |
| 1754 jlong os::javaTimeNanos() { | |
| 1755 return (jlong)getTimeNanos(); | |
| 1756 } | |
| 1757 | |
| 1758 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
| 1759 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits | |
| 1760 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
| 1761 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
| 1762 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
| 1763 } | |
| 1764 | |
| 1765 char * os::local_time_string(char *buf, size_t buflen) { | |
| 1766 struct tm t; | |
| 1767 time_t long_time; | |
| 1768 time(&long_time); | |
| 1769 localtime_r(&long_time, &t); | |
| 1770 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
| 1771 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
| 1772 t.tm_hour, t.tm_min, t.tm_sec); | |
| 1773 return buf; | |
| 1774 } | |
| 1775 | |
| 1776 // Note: os::shutdown() might be called very early during initialization, or | |
| 1777 // called from signal handler. Before adding something to os::shutdown(), make | |
| 1778 // sure it is async-safe and can handle partially initialized VM. | |
| 1779 void os::shutdown() { | |
| 1780 | |
| 1781 // allow PerfMemory to attempt cleanup of any persistent resources | |
| 1782 perfMemory_exit(); | |
| 1783 | |
| 1784 // needs to remove object in file system | |
| 1785 AttachListener::abort(); | |
| 1786 | |
| 1787 // flush buffered output, finish log files | |
| 1788 ostream_abort(); | |
| 1789 | |
| 1790 // Check for abort hook | |
| 1791 abort_hook_t abort_hook = Arguments::abort_hook(); | |
| 1792 if (abort_hook != NULL) { | |
| 1793 abort_hook(); | |
| 1794 } | |
| 1795 } | |
| 1796 | |
| 1797 // Note: os::abort() might be called very early during initialization, or | |
| 1798 // called from signal handler. Before adding something to os::abort(), make | |
| 1799 // sure it is async-safe and can handle partially initialized VM. | |
| 1800 void os::abort(bool dump_core) { | |
| 1801 os::shutdown(); | |
| 1802 if (dump_core) { | |
| 1803 #ifndef PRODUCT | |
| 1804 fdStream out(defaultStream::output_fd()); | |
| 1805 out.print_raw("Current thread is "); | |
| 1806 char buf[16]; | |
| 1807 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
| 1808 out.print_raw_cr(buf); | |
| 1809 out.print_raw_cr("Dumping core ..."); | |
| 1810 #endif | |
| 1811 ::abort(); // dump core (for debugging) | |
| 1812 } | |
| 1813 | |
| 1814 ::exit(1); | |
| 1815 } | |
| 1816 | |
| 1817 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 1818 void os::die() { | |
| 1819 _exit(-1); | |
| 1820 } | |
| 1821 | |
| 1822 // unused | |
| 1823 void os::set_error_file(const char *logfile) {} | |
| 1824 | |
| 1825 // DLL functions | |
| 1826 | |
| 1827 const char* os::dll_file_extension() { return ".so"; } | |
| 1828 | |
| 1829 const char* os::get_temp_directory() { return "/tmp/"; } | |
| 1830 | |
| 691 | 1831 static bool file_exists(const char* filename) { |
| 1832 struct stat statbuf; | |
| 1833 if (filename == NULL || strlen(filename) == 0) { | |
| 1834 return false; | |
| 1835 } | |
| 1836 return os::stat(filename, &statbuf) == 0; | |
| 1837 } | |
| 1838 | |
| 1839 void os::dll_build_name(char* buffer, size_t buflen, | |
| 1840 const char* pname, const char* fname) { | |
| 1841 // Copied from libhpi | |
| 242 | 1842 const size_t pnamelen = pname ? strlen(pname) : 0; |
| 1843 | |
| 691 | 1844 // Quietly truncate on buffer overflow. Should be an error. |
| 242 | 1845 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { |
| 1846 *buffer = '\0'; | |
| 1847 return; | |
| 1848 } | |
| 1849 | |
| 1850 if (pnamelen == 0) { | |
| 691 | 1851 snprintf(buffer, buflen, "lib%s.so", fname); |
| 1852 } else if (strchr(pname, *os::path_separator()) != NULL) { | |
| 1853 int n; | |
| 1854 char** pelements = split_path(pname, &n); | |
| 1855 for (int i = 0 ; i < n ; i++) { | |
| 1856 // really shouldn't be NULL but what the heck, check can't hurt | |
| 1857 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { | |
| 1858 continue; // skip the empty path values | |
| 1859 } | |
| 1860 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); | |
| 1861 if (file_exists(buffer)) { | |
| 1862 break; | |
| 1863 } | |
| 1864 } | |
| 1865 // release the storage | |
| 1866 for (int i = 0 ; i < n ; i++) { | |
| 1867 if (pelements[i] != NULL) { | |
| 1868 FREE_C_HEAP_ARRAY(char, pelements[i]); | |
| 1869 } | |
| 1870 } | |
| 1871 if (pelements != NULL) { | |
| 1872 FREE_C_HEAP_ARRAY(char*, pelements); | |
| 1873 } | |
| 242 | 1874 } else { |
| 691 | 1875 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); |
| 242 | 1876 } |
| 1877 } | |
| 1878 | |
| 0 | 1879 const char* os::get_current_directory(char *buf, int buflen) { |
| 1880 return getcwd(buf, buflen); | |
| 1881 } | |
| 1882 | |
| 1883 // check if addr is inside libjvm[_g].so | |
| 1884 bool os::address_is_in_vm(address addr) { | |
| 1885 static address libjvm_base_addr; | |
| 1886 Dl_info dlinfo; | |
| 1887 | |
| 1888 if (libjvm_base_addr == NULL) { | |
| 1889 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); | |
| 1890 libjvm_base_addr = (address)dlinfo.dli_fbase; | |
| 1891 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); | |
| 1892 } | |
| 1893 | |
| 1894 if (dladdr((void *)addr, &dlinfo)) { | |
| 1895 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; | |
| 1896 } | |
| 1897 | |
| 1898 return false; | |
| 1899 } | |
| 1900 | |
| 1901 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); | |
| 1902 static dladdr1_func_type dladdr1_func = NULL; | |
| 1903 | |
| 1904 bool os::dll_address_to_function_name(address addr, char *buf, | |
| 1905 int buflen, int * offset) { | |
| 1906 Dl_info dlinfo; | |
| 1907 | |
| 1908 // dladdr1_func was initialized in os::init() | |
| 1909 if (dladdr1_func){ | |
| 1910 // yes, we have dladdr1 | |
| 1911 | |
| 1912 // Support for dladdr1 is checked at runtime; it may be | |
| 1913 // available even if the vm is built on a machine that does | |
| 1914 // not have dladdr1 support. Make sure there is a value for | |
| 1915 // RTLD_DL_SYMENT. | |
| 1916 #ifndef RTLD_DL_SYMENT | |
| 1917 #define RTLD_DL_SYMENT 1 | |
| 1918 #endif | |
| 1919 Sym * info; | |
| 1920 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, | |
| 1921 RTLD_DL_SYMENT)) { | |
| 1922 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); | |
| 1923 if (offset) *offset = addr - (address)dlinfo.dli_saddr; | |
| 1924 | |
| 1925 // check if the returned symbol really covers addr | |
| 1926 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); | |
| 1927 } else { | |
| 1928 if (buf) buf[0] = '\0'; | |
| 1929 if (offset) *offset = -1; | |
| 1930 return false; | |
| 1931 } | |
| 1932 } else { | |
| 1933 // no, only dladdr is available | |
| 1934 if(dladdr((void *)addr, &dlinfo)) { | |
| 1935 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); | |
| 1936 if (offset) *offset = addr - (address)dlinfo.dli_saddr; | |
| 1937 return true; | |
| 1938 } else { | |
| 1939 if (buf) buf[0] = '\0'; | |
| 1940 if (offset) *offset = -1; | |
| 1941 return false; | |
| 1942 } | |
| 1943 } | |
| 1944 } | |
| 1945 | |
| 1946 bool os::dll_address_to_library_name(address addr, char* buf, | |
| 1947 int buflen, int* offset) { | |
| 1948 Dl_info dlinfo; | |
| 1949 | |
| 1950 if (dladdr((void*)addr, &dlinfo)){ | |
| 1951 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); | |
| 1952 if (offset) *offset = addr - (address)dlinfo.dli_fbase; | |
| 1953 return true; | |
| 1954 } else { | |
| 1955 if (buf) buf[0] = '\0'; | |
| 1956 if (offset) *offset = -1; | |
| 1957 return false; | |
| 1958 } | |
| 1959 } | |
| 1960 | |
| 1961 // Prints the names and full paths of all opened dynamic libraries | |
| 1962 // for current process | |
| 1963 void os::print_dll_info(outputStream * st) { | |
| 1964 Dl_info dli; | |
| 1965 void *handle; | |
| 1966 Link_map *map; | |
| 1967 Link_map *p; | |
| 1968 | |
| 1969 st->print_cr("Dynamic libraries:"); st->flush(); | |
| 1970 | |
| 1971 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { | |
| 1972 st->print_cr("Error: Cannot print dynamic libraries."); | |
| 1973 return; | |
| 1974 } | |
| 1975 handle = dlopen(dli.dli_fname, RTLD_LAZY); | |
| 1976 if (handle == NULL) { | |
| 1977 st->print_cr("Error: Cannot print dynamic libraries."); | |
| 1978 return; | |
| 1979 } | |
| 1980 dlinfo(handle, RTLD_DI_LINKMAP, &map); | |
| 1981 if (map == NULL) { | |
| 1982 st->print_cr("Error: Cannot print dynamic libraries."); | |
| 1983 return; | |
| 1984 } | |
| 1985 | |
| 1986 while (map->l_prev != NULL) | |
| 1987 map = map->l_prev; | |
| 1988 | |
| 1989 while (map != NULL) { | |
| 1990 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); | |
| 1991 map = map->l_next; | |
| 1992 } | |
| 1993 | |
| 1994 dlclose(handle); | |
| 1995 } | |
| 1996 | |
| 1997 // Loads .dll/.so and | |
| 1998 // in case of error it checks if .dll/.so was built for the | |
| 1999 // same architecture as Hotspot is running on | |
| 2000 | |
| 2001 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) | |
| 2002 { | |
| 2003 void * result= ::dlopen(filename, RTLD_LAZY); | |
| 2004 if (result != NULL) { | |
| 2005 // Successful loading | |
| 2006 return result; | |
| 2007 } | |
| 2008 | |
| 2009 Elf32_Ehdr elf_head; | |
| 2010 | |
| 2011 // Read system error message into ebuf | |
| 2012 // It may or may not be overwritten below | |
| 2013 ::strncpy(ebuf, ::dlerror(), ebuflen-1); | |
| 2014 ebuf[ebuflen-1]='\0'; | |
| 2015 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
| 2016 char* diag_msg_buf=ebuf+strlen(ebuf); | |
| 2017 | |
| 2018 if (diag_msg_max_length==0) { | |
| 2019 // No more space in ebuf for additional diagnostics message | |
| 2020 return NULL; | |
| 2021 } | |
| 2022 | |
| 2023 | |
| 2024 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
| 2025 | |
| 2026 if (file_descriptor < 0) { | |
| 2027 // Can't open library, report dlerror() message | |
| 2028 return NULL; | |
| 2029 } | |
| 2030 | |
| 2031 bool failed_to_read_elf_head= | |
| 2032 (sizeof(elf_head)!= | |
| 2033 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
| 2034 | |
| 2035 ::close(file_descriptor); | |
| 2036 if (failed_to_read_elf_head) { | |
| 2037 // file i/o error - report dlerror() msg | |
| 2038 return NULL; | |
| 2039 } | |
| 2040 | |
| 2041 typedef struct { | |
| 2042 Elf32_Half code; // Actual value as defined in elf.h | |
| 2043 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
| 2044 char elf_class; // 32 or 64 bit | |
| 2045 char endianess; // MSB or LSB | |
| 2046 char* name; // String representation | |
| 2047 } arch_t; | |
| 2048 | |
| 2049 static const arch_t arch_array[]={ | |
| 2050 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 2051 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 2052 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
| 2053 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
| 2054 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 2055 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 2056 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
| 2057 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
| 2058 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} | |
| 2059 }; | |
| 2060 | |
| 2061 #if (defined IA32) | |
| 2062 static Elf32_Half running_arch_code=EM_386; | |
| 2063 #elif (defined AMD64) | |
| 2064 static Elf32_Half running_arch_code=EM_X86_64; | |
| 2065 #elif (defined IA64) | |
| 2066 static Elf32_Half running_arch_code=EM_IA_64; | |
| 2067 #elif (defined __sparc) && (defined _LP64) | |
| 2068 static Elf32_Half running_arch_code=EM_SPARCV9; | |
| 2069 #elif (defined __sparc) && (!defined _LP64) | |
| 2070 static Elf32_Half running_arch_code=EM_SPARC; | |
| 2071 #elif (defined __powerpc64__) | |
| 2072 static Elf32_Half running_arch_code=EM_PPC64; | |
| 2073 #elif (defined __powerpc__) | |
| 2074 static Elf32_Half running_arch_code=EM_PPC; | |
| 2075 #else | |
| 2076 #error Method os::dll_load requires that one of following is defined:\ | |
| 2077 IA32, AMD64, IA64, __sparc, __powerpc__ | |
| 2078 #endif | |
| 2079 | |
| 2080 // Identify compatability class for VM's architecture and library's architecture | |
| 2081 // Obtain string descriptions for architectures | |
| 2082 | |
| 2083 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
| 2084 int running_arch_index=-1; | |
| 2085 | |
| 2086 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
| 2087 if (running_arch_code == arch_array[i].code) { | |
| 2088 running_arch_index = i; | |
| 2089 } | |
| 2090 if (lib_arch.code == arch_array[i].code) { | |
| 2091 lib_arch.compat_class = arch_array[i].compat_class; | |
| 2092 lib_arch.name = arch_array[i].name; | |
| 2093 } | |
| 2094 } | |
| 2095 | |
| 2096 assert(running_arch_index != -1, | |
| 2097 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
| 2098 if (running_arch_index == -1) { | |
| 2099 // Even though running architecture detection failed | |
| 2100 // we may still continue with reporting dlerror() message | |
| 2101 return NULL; | |
| 2102 } | |
| 2103 | |
| 2104 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
| 2105 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
| 2106 return NULL; | |
| 2107 } | |
| 2108 | |
| 2109 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { | |
| 2110 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
| 2111 return NULL; | |
| 2112 } | |
| 2113 | |
| 2114 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
| 2115 if ( lib_arch.name!=NULL ) { | |
| 2116 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2117 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
| 2118 lib_arch.name, arch_array[running_arch_index].name); | |
| 2119 } else { | |
| 2120 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2121 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
| 2122 lib_arch.code, | |
| 2123 arch_array[running_arch_index].name); | |
| 2124 } | |
| 2125 } | |
| 2126 | |
| 2127 return NULL; | |
| 2128 } | |
| 2129 | |
| 242 | 2130 void* os::dll_lookup(void* handle, const char* name) { |
| 2131 return dlsym(handle, name); | |
| 2132 } | |
| 0 | 2133 |
| 2134 | |
| 2135 bool _print_ascii_file(const char* filename, outputStream* st) { | |
| 2136 int fd = open(filename, O_RDONLY); | |
| 2137 if (fd == -1) { | |
| 2138 return false; | |
| 2139 } | |
| 2140 | |
| 2141 char buf[32]; | |
| 2142 int bytes; | |
| 2143 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { | |
| 2144 st->print_raw(buf, bytes); | |
| 2145 } | |
| 2146 | |
| 2147 close(fd); | |
| 2148 | |
| 2149 return true; | |
| 2150 } | |
| 2151 | |
| 2152 void os::print_os_info(outputStream* st) { | |
| 2153 st->print("OS:"); | |
| 2154 | |
| 2155 if (!_print_ascii_file("/etc/release", st)) { | |
| 2156 st->print("Solaris"); | |
| 2157 } | |
| 2158 st->cr(); | |
| 2159 | |
| 2160 // kernel | |
| 2161 st->print("uname:"); | |
| 2162 struct utsname name; | |
| 2163 uname(&name); | |
| 2164 st->print(name.sysname); st->print(" "); | |
| 2165 st->print(name.release); st->print(" "); | |
| 2166 st->print(name.version); st->print(" "); | |
| 2167 st->print(name.machine); | |
| 2168 | |
| 2169 // libthread | |
| 2170 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); | |
| 2171 else st->print(" (T1 libthread)"); | |
| 2172 st->cr(); | |
| 2173 | |
| 2174 // rlimit | |
| 2175 st->print("rlimit:"); | |
| 2176 struct rlimit rlim; | |
| 2177 | |
| 2178 st->print(" STACK "); | |
| 2179 getrlimit(RLIMIT_STACK, &rlim); | |
| 2180 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2181 else st->print("%uk", rlim.rlim_cur >> 10); | |
| 2182 | |
| 2183 st->print(", CORE "); | |
| 2184 getrlimit(RLIMIT_CORE, &rlim); | |
| 2185 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2186 else st->print("%uk", rlim.rlim_cur >> 10); | |
| 2187 | |
| 2188 st->print(", NOFILE "); | |
| 2189 getrlimit(RLIMIT_NOFILE, &rlim); | |
| 2190 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2191 else st->print("%d", rlim.rlim_cur); | |
| 2192 | |
| 2193 st->print(", AS "); | |
| 2194 getrlimit(RLIMIT_AS, &rlim); | |
| 2195 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2196 else st->print("%uk", rlim.rlim_cur >> 10); | |
| 2197 st->cr(); | |
| 2198 | |
| 2199 // load average | |
| 2200 st->print("load average:"); | |
| 2201 double loadavg[3]; | |
| 2202 os::loadavg(loadavg, 3); | |
| 2203 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); | |
| 2204 st->cr(); | |
| 2205 } | |
| 2206 | |
| 2207 | |
| 2208 static bool check_addr0(outputStream* st) { | |
| 2209 jboolean status = false; | |
| 2210 int fd = open("/proc/self/map",O_RDONLY); | |
| 2211 if (fd >= 0) { | |
| 2212 prmap_t p; | |
| 2213 while(read(fd, &p, sizeof(p)) > 0) { | |
| 2214 if (p.pr_vaddr == 0x0) { | |
| 2215 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); | |
| 2216 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); | |
| 2217 st->print("Access:"); | |
| 2218 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); | |
| 2219 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); | |
| 2220 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); | |
| 2221 st->cr(); | |
| 2222 status = true; | |
| 2223 } | |
| 2224 close(fd); | |
| 2225 } | |
| 2226 } | |
| 2227 return status; | |
| 2228 } | |
| 2229 | |
| 2230 void os::print_memory_info(outputStream* st) { | |
| 2231 st->print("Memory:"); | |
| 2232 st->print(" %dk page", os::vm_page_size()>>10); | |
| 2233 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); | |
| 2234 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); | |
| 2235 st->cr(); | |
| 2236 (void) check_addr0(st); | |
| 2237 } | |
| 2238 | |
| 2239 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific | |
| 2240 // but they're the same for all the solaris architectures that we support. | |
| 2241 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", | |
| 2242 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", | |
| 2243 "ILL_COPROC", "ILL_BADSTK" }; | |
| 2244 | |
| 2245 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", | |
| 2246 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", | |
| 2247 "FPE_FLTINV", "FPE_FLTSUB" }; | |
| 2248 | |
| 2249 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; | |
| 2250 | |
| 2251 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; | |
| 2252 | |
| 2253 void os::print_siginfo(outputStream* st, void* siginfo) { | |
| 2254 st->print("siginfo:"); | |
| 2255 | |
| 2256 const int buflen = 100; | |
| 2257 char buf[buflen]; | |
| 2258 siginfo_t *si = (siginfo_t*)siginfo; | |
| 2259 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); | |
| 2260 char *err = strerror(si->si_errno); | |
| 2261 if (si->si_errno != 0 && err != NULL) { | |
| 2262 st->print("si_errno=%s", err); | |
| 2263 } else { | |
| 2264 st->print("si_errno=%d", si->si_errno); | |
| 2265 } | |
| 2266 const int c = si->si_code; | |
| 2267 assert(c > 0, "unexpected si_code"); | |
| 2268 switch (si->si_signo) { | |
| 2269 case SIGILL: | |
| 2270 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); | |
| 2271 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2272 break; | |
| 2273 case SIGFPE: | |
| 2274 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); | |
| 2275 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2276 break; | |
| 2277 case SIGSEGV: | |
| 2278 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); | |
| 2279 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2280 break; | |
| 2281 case SIGBUS: | |
| 2282 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); | |
| 2283 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2284 break; | |
| 2285 default: | |
| 2286 st->print(", si_code=%d", si->si_code); | |
| 2287 // no si_addr | |
| 2288 } | |
| 2289 | |
| 2290 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && | |
| 2291 UseSharedSpaces) { | |
| 2292 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
| 2293 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
| 2294 st->print("\n\nError accessing class data sharing archive." \ | |
| 2295 " Mapped file inaccessible during execution, " \ | |
| 2296 " possible disk/network problem."); | |
| 2297 } | |
| 2298 } | |
| 2299 st->cr(); | |
| 2300 } | |
| 2301 | |
| 2302 // Moved from whole group, because we need them here for diagnostic | |
| 2303 // prints. | |
| 2304 #define OLDMAXSIGNUM 32 | |
| 2305 static int Maxsignum = 0; | |
| 2306 static int *ourSigFlags = NULL; | |
| 2307 | |
| 2308 extern "C" void sigINTRHandler(int, siginfo_t*, void*); | |
| 2309 | |
| 2310 int os::Solaris::get_our_sigflags(int sig) { | |
| 2311 assert(ourSigFlags!=NULL, "signal data structure not initialized"); | |
| 2312 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); | |
| 2313 return ourSigFlags[sig]; | |
| 2314 } | |
| 2315 | |
| 2316 void os::Solaris::set_our_sigflags(int sig, int flags) { | |
| 2317 assert(ourSigFlags!=NULL, "signal data structure not initialized"); | |
| 2318 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); | |
| 2319 ourSigFlags[sig] = flags; | |
| 2320 } | |
| 2321 | |
| 2322 | |
| 2323 static const char* get_signal_handler_name(address handler, | |
| 2324 char* buf, int buflen) { | |
| 2325 int offset; | |
| 2326 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); | |
| 2327 if (found) { | |
| 2328 // skip directory names | |
| 2329 const char *p1, *p2; | |
| 2330 p1 = buf; | |
| 2331 size_t len = strlen(os::file_separator()); | |
| 2332 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
| 2333 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
| 2334 } else { | |
| 2335 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
| 2336 } | |
| 2337 return buf; | |
| 2338 } | |
| 2339 | |
| 2340 static void print_signal_handler(outputStream* st, int sig, | |
| 2341 char* buf, size_t buflen) { | |
| 2342 struct sigaction sa; | |
| 2343 | |
| 2344 sigaction(sig, NULL, &sa); | |
| 2345 | |
| 2346 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
| 2347 | |
| 2348 address handler = (sa.sa_flags & SA_SIGINFO) | |
| 2349 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
| 2350 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
| 2351 | |
| 2352 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
| 2353 st->print("SIG_DFL"); | |
| 2354 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
| 2355 st->print("SIG_IGN"); | |
| 2356 } else { | |
| 2357 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
| 2358 } | |
| 2359 | |
| 2360 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); | |
| 2361 | |
| 2362 address rh = VMError::get_resetted_sighandler(sig); | |
| 2363 // May be, handler was resetted by VMError? | |
| 2364 if(rh != NULL) { | |
| 2365 handler = rh; | |
| 2366 sa.sa_flags = VMError::get_resetted_sigflags(sig); | |
| 2367 } | |
| 2368 | |
| 2369 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); | |
| 2370 | |
| 2371 // Check: is it our handler? | |
| 2372 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || | |
| 2373 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { | |
| 2374 // It is our signal handler | |
| 2375 // check for flags | |
| 2376 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { | |
| 2377 st->print( | |
| 2378 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
| 2379 os::Solaris::get_our_sigflags(sig)); | |
| 2380 } | |
| 2381 } | |
| 2382 st->cr(); | |
| 2383 } | |
| 2384 | |
| 2385 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
| 2386 st->print_cr("Signal Handlers:"); | |
| 2387 print_signal_handler(st, SIGSEGV, buf, buflen); | |
| 2388 print_signal_handler(st, SIGBUS , buf, buflen); | |
| 2389 print_signal_handler(st, SIGFPE , buf, buflen); | |
| 2390 print_signal_handler(st, SIGPIPE, buf, buflen); | |
| 2391 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
| 2392 print_signal_handler(st, SIGILL , buf, buflen); | |
| 2393 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
| 2394 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); | |
| 2395 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
| 2396 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); | |
| 2397 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
| 2398 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); | |
| 2399 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); | |
| 2400 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); | |
| 2401 } | |
| 2402 | |
| 2403 static char saved_jvm_path[MAXPATHLEN] = { 0 }; | |
| 2404 | |
| 2405 // Find the full path to the current module, libjvm.so or libjvm_g.so | |
| 2406 void os::jvm_path(char *buf, jint buflen) { | |
| 2407 // Error checking. | |
| 2408 if (buflen < MAXPATHLEN) { | |
| 2409 assert(false, "must use a large-enough buffer"); | |
| 2410 buf[0] = '\0'; | |
| 2411 return; | |
| 2412 } | |
| 2413 // Lazy resolve the path to current module. | |
| 2414 if (saved_jvm_path[0] != 0) { | |
| 2415 strcpy(buf, saved_jvm_path); | |
| 2416 return; | |
| 2417 } | |
| 2418 | |
| 2419 Dl_info dlinfo; | |
| 2420 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); | |
| 2421 assert(ret != 0, "cannot locate libjvm"); | |
| 2422 realpath((char *)dlinfo.dli_fname, buf); | |
| 2423 | |
| 2424 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { | |
| 2425 // Support for the gamma launcher. Typical value for buf is | |
| 2426 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
| 2427 // the right place in the string, then assume we are installed in a JDK and | |
| 2428 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
| 2429 // up the path so it looks like libjvm.so is installed there (append a | |
| 2430 // fake suffix hotspot/libjvm.so). | |
| 2431 const char *p = buf + strlen(buf) - 1; | |
| 2432 for (int count = 0; p > buf && count < 5; ++count) { | |
| 2433 for (--p; p > buf && *p != '/'; --p) | |
| 2434 /* empty */ ; | |
| 2435 } | |
| 2436 | |
| 2437 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
| 2438 // Look for JAVA_HOME in the environment. | |
| 2439 char* java_home_var = ::getenv("JAVA_HOME"); | |
| 2440 if (java_home_var != NULL && java_home_var[0] != 0) { | |
| 2441 char cpu_arch[12]; | |
| 2442 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); | |
| 2443 #ifdef _LP64 | |
| 2444 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. | |
| 2445 if (strcmp(cpu_arch, "sparc") == 0) { | |
| 2446 strcat(cpu_arch, "v9"); | |
| 2447 } else if (strcmp(cpu_arch, "i386") == 0) { | |
| 2448 strcpy(cpu_arch, "amd64"); | |
| 2449 } | |
| 2450 #endif | |
| 2451 // Check the current module name "libjvm.so" or "libjvm_g.so". | |
| 2452 p = strrchr(buf, '/'); | |
| 2453 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
| 2454 p = strstr(p, "_g") ? "_g" : ""; | |
| 2455 | |
| 2456 realpath(java_home_var, buf); | |
| 2457 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); | |
| 2458 if (0 == access(buf, F_OK)) { | |
| 2459 // Use current module name "libjvm[_g].so" instead of | |
| 2460 // "libjvm"debug_only("_g")".so" since for fastdebug version | |
| 2461 // we should have "libjvm.so" but debug_only("_g") adds "_g"! | |
| 2462 // It is used when we are choosing the HPI library's name | |
| 2463 // "libhpi[_g].so" in hpi::initialize_get_interface(). | |
| 2464 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); | |
| 2465 } else { | |
| 2466 // Go back to path of .so | |
| 2467 realpath((char *)dlinfo.dli_fname, buf); | |
| 2468 } | |
| 2469 } | |
| 2470 } | |
| 2471 } | |
| 2472 | |
| 2473 strcpy(saved_jvm_path, buf); | |
| 2474 } | |
| 2475 | |
| 2476 | |
| 2477 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
| 2478 // no prefix required, not even "_" | |
| 2479 } | |
| 2480 | |
| 2481 | |
| 2482 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
| 2483 // no suffix required | |
| 2484 } | |
| 2485 | |
| 2486 | |
| 2487 // sun.misc.Signal | |
| 2488 | |
| 2489 extern "C" { | |
| 2490 static void UserHandler(int sig, void *siginfo, void *context) { | |
| 2491 // Ctrl-C is pressed during error reporting, likely because the error | |
| 2492 // handler fails to abort. Let VM die immediately. | |
| 2493 if (sig == SIGINT && is_error_reported()) { | |
| 2494 os::die(); | |
| 2495 } | |
| 2496 | |
| 2497 os::signal_notify(sig); | |
| 2498 // We do not need to reinstate the signal handler each time... | |
| 2499 } | |
| 2500 } | |
| 2501 | |
| 2502 void* os::user_handler() { | |
| 2503 return CAST_FROM_FN_PTR(void*, UserHandler); | |
| 2504 } | |
| 2505 | |
| 2506 extern "C" { | |
| 2507 typedef void (*sa_handler_t)(int); | |
| 2508 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
| 2509 } | |
| 2510 | |
| 2511 void* os::signal(int signal_number, void* handler) { | |
| 2512 struct sigaction sigAct, oldSigAct; | |
| 2513 sigfillset(&(sigAct.sa_mask)); | |
| 2514 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; | |
| 2515 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
| 2516 | |
| 2517 if (sigaction(signal_number, &sigAct, &oldSigAct)) | |
| 2518 // -1 means registration failed | |
| 2519 return (void *)-1; | |
| 2520 | |
| 2521 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
| 2522 } | |
| 2523 | |
| 2524 void os::signal_raise(int signal_number) { | |
| 2525 raise(signal_number); | |
| 2526 } | |
| 2527 | |
| 2528 /* | |
| 2529 * The following code is moved from os.cpp for making this | |
| 2530 * code platform specific, which it is by its very nature. | |
| 2531 */ | |
| 2532 | |
| 2533 // a counter for each possible signal value | |
| 2534 static int Sigexit = 0; | |
| 2535 static int Maxlibjsigsigs; | |
| 2536 static jint *pending_signals = NULL; | |
| 2537 static int *preinstalled_sigs = NULL; | |
| 2538 static struct sigaction *chainedsigactions = NULL; | |
| 2539 static sema_t sig_sem; | |
| 2540 typedef int (*version_getting_t)(); | |
| 2541 version_getting_t os::Solaris::get_libjsig_version = NULL; | |
| 2542 static int libjsigversion = NULL; | |
| 2543 | |
| 2544 int os::sigexitnum_pd() { | |
| 2545 assert(Sigexit > 0, "signal memory not yet initialized"); | |
| 2546 return Sigexit; | |
| 2547 } | |
| 2548 | |
| 2549 void os::Solaris::init_signal_mem() { | |
| 2550 // Initialize signal structures | |
| 2551 Maxsignum = SIGRTMAX; | |
| 2552 Sigexit = Maxsignum+1; | |
| 2553 assert(Maxsignum >0, "Unable to obtain max signal number"); | |
| 2554 | |
| 2555 Maxlibjsigsigs = Maxsignum; | |
| 2556 | |
| 2557 // pending_signals has one int per signal | |
| 2558 // The additional signal is for SIGEXIT - exit signal to signal_thread | |
| 2559 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); | |
| 2560 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); | |
| 2561 | |
| 2562 if (UseSignalChaining) { | |
| 2563 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) | |
| 2564 * (Maxsignum + 1)); | |
| 2565 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); | |
| 2566 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); | |
| 2567 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); | |
| 2568 } | |
| 2569 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); | |
| 2570 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); | |
| 2571 } | |
| 2572 | |
| 2573 void os::signal_init_pd() { | |
| 2574 int ret; | |
| 2575 | |
| 2576 ret = ::sema_init(&sig_sem, 0, NULL, NULL); | |
| 2577 assert(ret == 0, "sema_init() failed"); | |
| 2578 } | |
| 2579 | |
| 2580 void os::signal_notify(int signal_number) { | |
| 2581 int ret; | |
| 2582 | |
| 2583 Atomic::inc(&pending_signals[signal_number]); | |
| 2584 ret = ::sema_post(&sig_sem); | |
| 2585 assert(ret == 0, "sema_post() failed"); | |
| 2586 } | |
| 2587 | |
| 2588 static int check_pending_signals(bool wait_for_signal) { | |
| 2589 int ret; | |
| 2590 while (true) { | |
| 2591 for (int i = 0; i < Sigexit + 1; i++) { | |
| 2592 jint n = pending_signals[i]; | |
| 2593 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
| 2594 return i; | |
| 2595 } | |
| 2596 } | |
| 2597 if (!wait_for_signal) { | |
| 2598 return -1; | |
| 2599 } | |
| 2600 JavaThread *thread = JavaThread::current(); | |
| 2601 ThreadBlockInVM tbivm(thread); | |
| 2602 | |
| 2603 bool threadIsSuspended; | |
| 2604 do { | |
| 2605 thread->set_suspend_equivalent(); | |
| 2606 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 2607 while((ret = ::sema_wait(&sig_sem)) == EINTR) | |
| 2608 ; | |
| 2609 assert(ret == 0, "sema_wait() failed"); | |
| 2610 | |
| 2611 // were we externally suspended while we were waiting? | |
| 2612 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
| 2613 if (threadIsSuspended) { | |
| 2614 // | |
| 2615 // The semaphore has been incremented, but while we were waiting | |
| 2616 // another thread suspended us. We don't want to continue running | |
| 2617 // while suspended because that would surprise the thread that | |
| 2618 // suspended us. | |
| 2619 // | |
| 2620 ret = ::sema_post(&sig_sem); | |
| 2621 assert(ret == 0, "sema_post() failed"); | |
| 2622 | |
| 2623 thread->java_suspend_self(); | |
| 2624 } | |
| 2625 } while (threadIsSuspended); | |
| 2626 } | |
| 2627 } | |
| 2628 | |
| 2629 int os::signal_lookup() { | |
| 2630 return check_pending_signals(false); | |
| 2631 } | |
| 2632 | |
| 2633 int os::signal_wait() { | |
| 2634 return check_pending_signals(true); | |
| 2635 } | |
| 2636 | |
| 2637 //////////////////////////////////////////////////////////////////////////////// | |
| 2638 // Virtual Memory | |
| 2639 | |
| 2640 static int page_size = -1; | |
| 2641 | |
| 2642 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will | |
| 2643 // clear this var if support is not available. | |
| 2644 static bool has_map_align = true; | |
| 2645 | |
| 2646 int os::vm_page_size() { | |
| 2647 assert(page_size != -1, "must call os::init"); | |
| 2648 return page_size; | |
| 2649 } | |
| 2650 | |
| 2651 // Solaris allocates memory by pages. | |
| 2652 int os::vm_allocation_granularity() { | |
| 2653 assert(page_size != -1, "must call os::init"); | |
| 2654 return page_size; | |
| 2655 } | |
| 2656 | |
| 656 | 2657 bool os::commit_memory(char* addr, size_t bytes, bool exec) { |
| 2658 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; | |
| 0 | 2659 size_t size = bytes; |
| 2660 return | |
| 656 | 2661 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); |
| 2662 } | |
| 2663 | |
| 2664 bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint, | |
| 2665 bool exec) { | |
| 2666 if (commit_memory(addr, bytes, exec)) { | |
| 0 | 2667 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { |
| 2668 // If the large page size has been set and the VM | |
| 2669 // is using large pages, use the large page size | |
| 2670 // if it is smaller than the alignment hint. This is | |
| 2671 // a case where the VM wants to use a larger alignment size | |
| 2672 // for its own reasons but still want to use large pages | |
| 2673 // (which is what matters to setting the mpss range. | |
| 2674 size_t page_size = 0; | |
| 2675 if (large_page_size() < alignment_hint) { | |
| 2676 assert(UseLargePages, "Expected to be here for large page use only"); | |
| 2677 page_size = large_page_size(); | |
| 2678 } else { | |
| 2679 // If the alignment hint is less than the large page | |
| 2680 // size, the VM wants a particular alignment (thus the hint) | |
| 2681 // for internal reasons. Try to set the mpss range using | |
| 2682 // the alignment_hint. | |
| 2683 page_size = alignment_hint; | |
| 2684 } | |
| 2685 // Since this is a hint, ignore any failures. | |
| 2686 (void)Solaris::set_mpss_range(addr, bytes, page_size); | |
| 2687 } | |
| 2688 return true; | |
| 2689 } | |
| 2690 return false; | |
| 2691 } | |
| 2692 | |
| 2693 // Uncommit the pages in a specified region. | |
| 2694 void os::free_memory(char* addr, size_t bytes) { | |
| 2695 if (madvise(addr, bytes, MADV_FREE) < 0) { | |
| 2696 debug_only(warning("MADV_FREE failed.")); | |
| 2697 return; | |
| 2698 } | |
| 2699 } | |
| 2700 | |
| 2701 // Change the page size in a given range. | |
| 2702 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
| 2703 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); | |
| 2704 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); | |
| 2705 Solaris::set_mpss_range(addr, bytes, alignment_hint); | |
| 2706 } | |
| 2707 | |
| 2708 // Tell the OS to make the range local to the first-touching LWP | |
| 141 | 2709 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
| 0 | 2710 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); |
| 2711 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { | |
| 2712 debug_only(warning("MADV_ACCESS_LWP failed.")); | |
| 2713 } | |
| 2714 } | |
| 2715 | |
| 2716 // Tell the OS that this range would be accessed from different LWPs. | |
| 2717 void os::numa_make_global(char *addr, size_t bytes) { | |
| 2718 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); | |
| 2719 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { | |
| 2720 debug_only(warning("MADV_ACCESS_MANY failed.")); | |
| 2721 } | |
| 2722 } | |
| 2723 | |
| 2724 // Get the number of the locality groups. | |
| 2725 size_t os::numa_get_groups_num() { | |
| 2726 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); | |
| 2727 return n != -1 ? n : 1; | |
| 2728 } | |
| 2729 | |
| 2730 // Get a list of leaf locality groups. A leaf lgroup is group that | |
| 2731 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory | |
| 2732 // board. An LWP is assigned to one of these groups upon creation. | |
| 2733 size_t os::numa_get_leaf_groups(int *ids, size_t size) { | |
| 2734 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { | |
| 2735 ids[0] = 0; | |
| 2736 return 1; | |
| 2737 } | |
| 2738 int result_size = 0, top = 1, bottom = 0, cur = 0; | |
| 2739 for (int k = 0; k < size; k++) { | |
| 2740 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], | |
| 2741 (Solaris::lgrp_id_t*)&ids[top], size - top); | |
| 2742 if (r == -1) { | |
| 2743 ids[0] = 0; | |
| 2744 return 1; | |
| 2745 } | |
| 2746 if (!r) { | |
|
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2747 // That's a leaf node. |
| 0 | 2748 assert (bottom <= cur, "Sanity check"); |
|
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2749 // Check if the node has memory |
|
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2750 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], |
|
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2751 NULL, 0, LGRP_RSRC_MEM) > 0) { |
|
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2752 ids[bottom++] = ids[cur]; |
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2753 } |
| 0 | 2754 } |
| 2755 top += r; | |
| 2756 cur++; | |
| 2757 } | |
|
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2758 if (bottom == 0) { |
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2759 // Handle a situation, when the OS reports no memory available. |
|
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|
2760 // Assume UMA architecture. |
|
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|
2761 ids[0] = 0; |
|
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|
2762 return 1; |
|
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|
2763 } |
| 0 | 2764 return bottom; |
| 2765 } | |
| 2766 | |
|
342
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|
2767 // Detect the topology change. Typically happens during CPU plugging-unplugging. |
| 0 | 2768 bool os::numa_topology_changed() { |
| 2769 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); | |
| 2770 if (is_stale != -1 && is_stale) { | |
| 2771 Solaris::lgrp_fini(Solaris::lgrp_cookie()); | |
| 2772 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); | |
| 2773 assert(c != 0, "Failure to initialize LGRP API"); | |
| 2774 Solaris::set_lgrp_cookie(c); | |
| 2775 return true; | |
| 2776 } | |
| 2777 return false; | |
| 2778 } | |
| 2779 | |
| 2780 // Get the group id of the current LWP. | |
| 2781 int os::numa_get_group_id() { | |
|
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|
2782 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); |
| 0 | 2783 if (lgrp_id == -1) { |
| 2784 return 0; | |
| 2785 } | |
|
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|
2786 const int size = os::numa_get_groups_num(); |
|
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|
2787 int *ids = (int*)alloca(size * sizeof(int)); |
|
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|
2788 |
|
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|
2789 // Get the ids of all lgroups with memory; r is the count. |
|
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|
2790 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, |
|
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|
2791 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); |
|
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|
2792 if (r <= 0) { |
|
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|
2793 return 0; |
|
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|
2794 } |
|
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|
2795 return ids[os::random() % r]; |
| 0 | 2796 } |
| 2797 | |
| 2798 // Request information about the page. | |
| 2799 bool os::get_page_info(char *start, page_info* info) { | |
| 2800 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; | |
| 2801 uint64_t addr = (uintptr_t)start; | |
| 2802 uint64_t outdata[2]; | |
| 2803 uint_t validity = 0; | |
| 2804 | |
| 2805 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { | |
| 2806 return false; | |
| 2807 } | |
| 2808 | |
| 2809 info->size = 0; | |
| 2810 info->lgrp_id = -1; | |
| 2811 | |
| 2812 if ((validity & 1) != 0) { | |
| 2813 if ((validity & 2) != 0) { | |
| 2814 info->lgrp_id = outdata[0]; | |
| 2815 } | |
| 2816 if ((validity & 4) != 0) { | |
| 2817 info->size = outdata[1]; | |
| 2818 } | |
| 2819 return true; | |
| 2820 } | |
| 2821 return false; | |
| 2822 } | |
| 2823 | |
| 2824 // Scan the pages from start to end until a page different than | |
| 2825 // the one described in the info parameter is encountered. | |
| 2826 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
| 2827 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; | |
| 2828 const size_t types = sizeof(info_types) / sizeof(info_types[0]); | |
| 2829 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; | |
| 2830 uint_t validity[MAX_MEMINFO_CNT]; | |
| 2831 | |
| 2832 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); | |
| 2833 uint64_t p = (uint64_t)start; | |
| 2834 while (p < (uint64_t)end) { | |
| 2835 addrs[0] = p; | |
| 2836 size_t addrs_count = 1; | |
| 2837 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { | |
| 2838 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; | |
| 2839 addrs_count++; | |
| 2840 } | |
| 2841 | |
| 2842 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { | |
| 2843 return NULL; | |
| 2844 } | |
| 2845 | |
| 2846 size_t i = 0; | |
| 2847 for (; i < addrs_count; i++) { | |
| 2848 if ((validity[i] & 1) != 0) { | |
| 2849 if ((validity[i] & 4) != 0) { | |
| 2850 if (outdata[types * i + 1] != page_expected->size) { | |
| 2851 break; | |
| 2852 } | |
| 2853 } else | |
| 2854 if (page_expected->size != 0) { | |
| 2855 break; | |
| 2856 } | |
| 2857 | |
| 2858 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { | |
| 2859 if (outdata[types * i] != page_expected->lgrp_id) { | |
| 2860 break; | |
| 2861 } | |
| 2862 } | |
| 2863 } else { | |
| 2864 return NULL; | |
| 2865 } | |
| 2866 } | |
| 2867 | |
| 2868 if (i != addrs_count) { | |
| 2869 if ((validity[i] & 2) != 0) { | |
| 2870 page_found->lgrp_id = outdata[types * i]; | |
| 2871 } else { | |
| 2872 page_found->lgrp_id = -1; | |
| 2873 } | |
| 2874 if ((validity[i] & 4) != 0) { | |
| 2875 page_found->size = outdata[types * i + 1]; | |
| 2876 } else { | |
| 2877 page_found->size = 0; | |
| 2878 } | |
| 2879 return (char*)addrs[i]; | |
| 2880 } | |
| 2881 | |
| 2882 p = addrs[addrs_count - 1] + page_size; | |
| 2883 } | |
| 2884 return end; | |
| 2885 } | |
| 2886 | |
| 2887 bool os::uncommit_memory(char* addr, size_t bytes) { | |
| 2888 size_t size = bytes; | |
| 2889 // Map uncommitted pages PROT_NONE so we fail early if we touch an | |
| 2890 // uncommitted page. Otherwise, the read/write might succeed if we | |
| 2891 // have enough swap space to back the physical page. | |
| 2892 return | |
| 2893 NULL != Solaris::mmap_chunk(addr, size, | |
| 2894 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, | |
| 2895 PROT_NONE); | |
| 2896 } | |
| 2897 | |
| 2898 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { | |
| 2899 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); | |
| 2900 | |
| 2901 if (b == MAP_FAILED) { | |
| 2902 return NULL; | |
| 2903 } | |
| 2904 return b; | |
| 2905 } | |
| 2906 | |
|
60
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diff
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|
2907 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { |
|
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6204603: Modify hotspot to use new Solaris mmap semantics for class data archive file
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0
diff
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|
2908 char* addr = requested_addr; |
|
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0
diff
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|
2909 int flags = MAP_PRIVATE | MAP_NORESERVE; |
|
8d84e28e68ba
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sbohne
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0
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|
2910 |
|
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diff
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|
2911 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); |
|
8d84e28e68ba
6204603: Modify hotspot to use new Solaris mmap semantics for class data archive file
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|
2912 |
|
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|
2913 if (fixed) { |
|
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6204603: Modify hotspot to use new Solaris mmap semantics for class data archive file
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diff
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|
2914 flags |= MAP_FIXED; |
|
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diff
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|
2915 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { |
| 0 | 2916 flags |= MAP_ALIGN; |
| 2917 addr = (char*) alignment_hint; | |
| 2918 } | |
| 2919 | |
| 2920 // Map uncommitted pages PROT_NONE so we fail early if we touch an | |
| 2921 // uncommitted page. Otherwise, the read/write might succeed if we | |
| 2922 // have enough swap space to back the physical page. | |
|
60
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diff
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|
2923 return mmap_chunk(addr, bytes, flags, PROT_NONE); |
|
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sbohne
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0
diff
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|
2924 } |
|
8d84e28e68ba
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diff
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|
2925 |
|
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0
diff
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|
2926 char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { |
|
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0
diff
changeset
|
2927 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); |
| 0 | 2928 |
| 2929 guarantee(requested_addr == NULL || requested_addr == addr, | |
| 2930 "OS failed to return requested mmap address."); | |
| 2931 return addr; | |
| 2932 } | |
| 2933 | |
| 2934 // Reserve memory at an arbitrary address, only if that area is | |
| 2935 // available (and not reserved for something else). | |
| 2936 | |
| 2937 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { | |
| 2938 const int max_tries = 10; | |
| 2939 char* base[max_tries]; | |
| 2940 size_t size[max_tries]; | |
| 2941 | |
| 2942 // Solaris adds a gap between mmap'ed regions. The size of the gap | |
| 2943 // is dependent on the requested size and the MMU. Our initial gap | |
| 2944 // value here is just a guess and will be corrected later. | |
| 2945 bool had_top_overlap = false; | |
| 2946 bool have_adjusted_gap = false; | |
| 2947 size_t gap = 0x400000; | |
| 2948 | |
| 2949 // Assert only that the size is a multiple of the page size, since | |
| 2950 // that's all that mmap requires, and since that's all we really know | |
| 2951 // about at this low abstraction level. If we need higher alignment, | |
| 2952 // we can either pass an alignment to this method or verify alignment | |
| 2953 // in one of the methods further up the call chain. See bug 5044738. | |
| 2954 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
| 2955 | |
|
60
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diff
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|
2956 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. |
|
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parents:
0
diff
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|
2957 // Give it a try, if the kernel honors the hint we can return immediately. |
|
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sbohne
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0
diff
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|
2958 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); |
|
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|
2959 volatile int err = errno; |
|
8d84e28e68ba
6204603: Modify hotspot to use new Solaris mmap semantics for class data archive file
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0
diff
changeset
|
2960 if (addr == requested_addr) { |
|
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0
diff
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|
2961 return addr; |
|
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sbohne
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0
diff
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|
2962 } else if (addr != NULL) { |
|
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0
diff
changeset
|
2963 unmap_memory(addr, bytes); |
|
8d84e28e68ba
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0
diff
changeset
|
2964 } |
|
8d84e28e68ba
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0
diff
changeset
|
2965 |
|
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6204603: Modify hotspot to use new Solaris mmap semantics for class data archive file
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0
diff
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|
2966 if (PrintMiscellaneous && Verbose) { |
|
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0
diff
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|
2967 char buf[256]; |
|
8d84e28e68ba
6204603: Modify hotspot to use new Solaris mmap semantics for class data archive file
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0
diff
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|
2968 buf[0] = '\0'; |
|
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0
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|
2969 if (addr == NULL) { |
|
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0
diff
changeset
|
2970 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); |
|
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6204603: Modify hotspot to use new Solaris mmap semantics for class data archive file
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|
2971 } |
|
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changeset
|
2972 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " |
|
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sbohne
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0
diff
changeset
|
2973 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT |
|
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sbohne
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0
diff
changeset
|
2974 "%s", bytes, requested_addr, addr, buf); |
|
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sbohne
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0
diff
changeset
|
2975 } |
|
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sbohne
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0
diff
changeset
|
2976 |
|
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0
diff
changeset
|
2977 // Address hint method didn't work. Fall back to the old method. |
|
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sbohne
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0
diff
changeset
|
2978 // In theory, once SNV becomes our oldest supported platform, this |
|
8d84e28e68ba
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sbohne
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0
diff
changeset
|
2979 // code will no longer be needed. |
|
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0
diff
changeset
|
2980 // |
| 0 | 2981 // Repeatedly allocate blocks until the block is allocated at the |
| 2982 // right spot. Give up after max_tries. | |
| 2983 int i; | |
| 2984 for (i = 0; i < max_tries; ++i) { | |
| 2985 base[i] = reserve_memory(bytes); | |
| 2986 | |
| 2987 if (base[i] != NULL) { | |
| 2988 // Is this the block we wanted? | |
| 2989 if (base[i] == requested_addr) { | |
| 2990 size[i] = bytes; | |
| 2991 break; | |
| 2992 } | |
| 2993 | |
| 2994 // check that the gap value is right | |
| 2995 if (had_top_overlap && !have_adjusted_gap) { | |
| 2996 size_t actual_gap = base[i-1] - base[i] - bytes; | |
| 2997 if (gap != actual_gap) { | |
| 2998 // adjust the gap value and retry the last 2 allocations | |
| 2999 assert(i > 0, "gap adjustment code problem"); | |
| 3000 have_adjusted_gap = true; // adjust the gap only once, just in case | |
| 3001 gap = actual_gap; | |
| 3002 if (PrintMiscellaneous && Verbose) { | |
| 3003 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); | |
| 3004 } | |
| 3005 unmap_memory(base[i], bytes); | |
| 3006 unmap_memory(base[i-1], size[i-1]); | |
| 3007 i-=2; | |
| 3008 continue; | |
| 3009 } | |
| 3010 } | |
| 3011 | |
| 3012 // Does this overlap the block we wanted? Give back the overlapped | |
| 3013 // parts and try again. | |
| 3014 // | |
| 3015 // There is still a bug in this code: if top_overlap == bytes, | |
| 3016 // the overlap is offset from requested region by the value of gap. | |
| 3017 // In this case giving back the overlapped part will not work, | |
| 3018 // because we'll give back the entire block at base[i] and | |
| 3019 // therefore the subsequent allocation will not generate a new gap. | |
| 3020 // This could be fixed with a new algorithm that used larger | |
| 3021 // or variable size chunks to find the requested region - | |
| 3022 // but such a change would introduce additional complications. | |
| 3023 // It's rare enough that the planets align for this bug, | |
| 3024 // so we'll just wait for a fix for 6204603/5003415 which | |
| 3025 // will provide a mmap flag to allow us to avoid this business. | |
| 3026 | |
| 3027 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
| 3028 if (top_overlap >= 0 && top_overlap < bytes) { | |
| 3029 had_top_overlap = true; | |
| 3030 unmap_memory(base[i], top_overlap); | |
| 3031 base[i] += top_overlap; | |
| 3032 size[i] = bytes - top_overlap; | |
| 3033 } else { | |
| 3034 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
| 3035 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
| 3036 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { | |
| 3037 warning("attempt_reserve_memory_at: possible alignment bug"); | |
| 3038 } | |
| 3039 unmap_memory(requested_addr, bottom_overlap); | |
| 3040 size[i] = bytes - bottom_overlap; | |
| 3041 } else { | |
| 3042 size[i] = bytes; | |
| 3043 } | |
| 3044 } | |
| 3045 } | |
| 3046 } | |
| 3047 | |
| 3048 // Give back the unused reserved pieces. | |
| 3049 | |
| 3050 for (int j = 0; j < i; ++j) { | |
| 3051 if (base[j] != NULL) { | |
| 3052 unmap_memory(base[j], size[j]); | |
| 3053 } | |
| 3054 } | |
| 3055 | |
| 3056 return (i < max_tries) ? requested_addr : NULL; | |
| 3057 } | |
| 3058 | |
| 3059 bool os::release_memory(char* addr, size_t bytes) { | |
| 3060 size_t size = bytes; | |
| 3061 return munmap(addr, size) == 0; | |
| 3062 } | |
| 3063 | |
| 3064 static bool solaris_mprotect(char* addr, size_t bytes, int prot) { | |
| 3065 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), | |
| 3066 "addr must be page aligned"); | |
| 3067 int retVal = mprotect(addr, bytes, prot); | |
| 3068 return retVal == 0; | |
| 3069 } | |
| 3070 | |
|
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3071 // Protect memory (Used to pass readonly pages through |
| 0 | 3072 // JNI GetArray<type>Elements with empty arrays.) |
|
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3073 // Also, used for serialization page and for compressed oops null pointer |
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3074 // checking. |
|
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3075 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
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3076 bool is_committed) { |
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3077 unsigned int p = 0; |
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3078 switch (prot) { |
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3079 case MEM_PROT_NONE: p = PROT_NONE; break; |
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3080 case MEM_PROT_READ: p = PROT_READ; break; |
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3081 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
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3082 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
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3083 default: |
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3084 ShouldNotReachHere(); |
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3085 } |
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3086 // is_committed is unused. |
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3087 return solaris_mprotect(addr, bytes, p); |
| 0 | 3088 } |
| 3089 | |
| 3090 // guard_memory and unguard_memory only happens within stack guard pages. | |
| 3091 // Since ISM pertains only to the heap, guard and unguard memory should not | |
| 3092 /// happen with an ISM region. | |
| 3093 bool os::guard_memory(char* addr, size_t bytes) { | |
| 3094 return solaris_mprotect(addr, bytes, PROT_NONE); | |
| 3095 } | |
| 3096 | |
| 3097 bool os::unguard_memory(char* addr, size_t bytes) { | |
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3098 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); |
| 0 | 3099 } |
| 3100 | |
| 3101 // Large page support | |
| 3102 | |
| 3103 // UseLargePages is the master flag to enable/disable large page memory. | |
| 3104 // UseMPSS and UseISM are supported for compatibility reasons. Their combined | |
| 3105 // effects can be described in the following table: | |
| 3106 // | |
| 3107 // UseLargePages UseMPSS UseISM | |
| 3108 // false * * => UseLargePages is the master switch, turning | |
| 3109 // it off will turn off both UseMPSS and | |
| 3110 // UseISM. VM will not use large page memory | |
| 3111 // regardless the settings of UseMPSS/UseISM. | |
| 3112 // true false false => Unless future Solaris provides other | |
| 3113 // mechanism to use large page memory, this | |
| 3114 // combination is equivalent to -UseLargePages, | |
| 3115 // VM will not use large page memory | |
| 3116 // true true false => JVM will use MPSS for large page memory. | |
| 3117 // This is the default behavior. | |
| 3118 // true false true => JVM will use ISM for large page memory. | |
| 3119 // true true true => JVM will use ISM if it is available. | |
| 3120 // Otherwise, JVM will fall back to MPSS. | |
| 3121 // Becaues ISM is now available on all | |
| 3122 // supported Solaris versions, this combination | |
| 3123 // is equivalent to +UseISM -UseMPSS. | |
| 3124 | |
| 3125 typedef int (*getpagesizes_func_type) (size_t[], int); | |
| 3126 static size_t _large_page_size = 0; | |
| 3127 | |
| 3128 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { | |
| 3129 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address | |
| 3130 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc | |
| 3131 // can support multiple page sizes. | |
| 3132 | |
| 3133 // Don't bother to probe page size because getpagesizes() comes with MPSS. | |
| 3134 // ISM is only recommended on old Solaris where there is no MPSS support. | |
| 3135 // Simply choose a conservative value as default. | |
| 3136 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : | |
| 3137 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); | |
| 3138 | |
| 3139 // ISM is available on all supported Solaris versions | |
| 3140 return true; | |
| 3141 } | |
| 3142 | |
| 3143 // Insertion sort for small arrays (descending order). | |
| 3144 static void insertion_sort_descending(size_t* array, int len) { | |
| 3145 for (int i = 0; i < len; i++) { | |
| 3146 size_t val = array[i]; | |
| 3147 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { | |
| 3148 size_t tmp = array[key]; | |
| 3149 array[key] = array[key - 1]; | |
| 3150 array[key - 1] = tmp; | |
| 3151 } | |
| 3152 } | |
| 3153 } | |
| 3154 | |
| 3155 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { | |
| 3156 getpagesizes_func_type getpagesizes_func = | |
| 3157 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); | |
| 3158 if (getpagesizes_func == NULL) { | |
| 3159 if (warn) { | |
| 3160 warning("MPSS is not supported by the operating system."); | |
| 3161 } | |
| 3162 return false; | |
| 3163 } | |
| 3164 | |
| 3165 const unsigned int usable_count = VM_Version::page_size_count(); | |
| 3166 if (usable_count == 1) { | |
| 3167 return false; | |
| 3168 } | |
| 3169 | |
| 3170 // Fill the array of page sizes. | |
| 3171 int n = getpagesizes_func(_page_sizes, page_sizes_max); | |
| 3172 assert(n > 0, "Solaris bug?"); | |
| 3173 if (n == page_sizes_max) { | |
| 3174 // Add a sentinel value (necessary only if the array was completely filled | |
| 3175 // since it is static (zeroed at initialization)). | |
| 3176 _page_sizes[--n] = 0; | |
| 3177 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) | |
| 3178 } | |
| 3179 assert(_page_sizes[n] == 0, "missing sentinel"); | |
| 3180 | |
| 3181 if (n == 1) return false; // Only one page size available. | |
| 3182 | |
| 3183 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and | |
| 3184 // select up to usable_count elements. First sort the array, find the first | |
| 3185 // acceptable value, then copy the usable sizes to the top of the array and | |
| 3186 // trim the rest. Make sure to include the default page size :-). | |
| 3187 // | |
| 3188 // A better policy could get rid of the 4M limit by taking the sizes of the | |
| 3189 // important VM memory regions (java heap and possibly the code cache) into | |
| 3190 // account. | |
| 3191 insertion_sort_descending(_page_sizes, n); | |
| 3192 const size_t size_limit = | |
| 3193 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; | |
| 3194 int beg; | |
| 3195 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; | |
| 3196 const int end = MIN2((int)usable_count, n) - 1; | |
| 3197 for (int cur = 0; cur < end; ++cur, ++beg) { | |
| 3198 _page_sizes[cur] = _page_sizes[beg]; | |
| 3199 } | |
| 3200 _page_sizes[end] = vm_page_size(); | |
| 3201 _page_sizes[end + 1] = 0; | |
| 3202 | |
| 3203 if (_page_sizes[end] > _page_sizes[end - 1]) { | |
| 3204 // Default page size is not the smallest; sort again. | |
| 3205 insertion_sort_descending(_page_sizes, end + 1); | |
| 3206 } | |
| 3207 *page_size = _page_sizes[0]; | |
| 3208 | |
| 3209 return true; | |
| 3210 } | |
| 3211 | |
| 3212 bool os::large_page_init() { | |
| 3213 if (!UseLargePages) { | |
| 3214 UseISM = false; | |
| 3215 UseMPSS = false; | |
| 3216 return false; | |
| 3217 } | |
| 3218 | |
| 3219 // print a warning if any large page related flag is specified on command line | |
| 3220 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || | |
| 3221 !FLAG_IS_DEFAULT(UseISM) || | |
| 3222 !FLAG_IS_DEFAULT(UseMPSS) || | |
| 3223 !FLAG_IS_DEFAULT(LargePageSizeInBytes); | |
| 3224 UseISM = UseISM && | |
| 3225 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); | |
| 3226 if (UseISM) { | |
| 3227 // ISM disables MPSS to be compatible with old JDK behavior | |
| 3228 UseMPSS = false; | |
|
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3229 _page_sizes[0] = _large_page_size; |
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3230 _page_sizes[1] = vm_page_size(); |
| 0 | 3231 } |
| 3232 | |
| 3233 UseMPSS = UseMPSS && | |
| 3234 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); | |
| 3235 | |
| 3236 UseLargePages = UseISM || UseMPSS; | |
| 3237 return UseLargePages; | |
| 3238 } | |
| 3239 | |
| 3240 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { | |
| 3241 // Signal to OS that we want large pages for addresses | |
| 3242 // from addr, addr + bytes | |
| 3243 struct memcntl_mha mpss_struct; | |
| 3244 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; | |
| 3245 mpss_struct.mha_pagesize = align; | |
| 3246 mpss_struct.mha_flags = 0; | |
| 3247 if (memcntl(start, bytes, MC_HAT_ADVISE, | |
| 3248 (caddr_t) &mpss_struct, 0, 0) < 0) { | |
| 3249 debug_only(warning("Attempt to use MPSS failed.")); | |
| 3250 return false; | |
| 3251 } | |
| 3252 return true; | |
| 3253 } | |
| 3254 | |
| 656 | 3255 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { |
| 3256 // "exec" is passed in but not used. Creating the shared image for | |
| 3257 // the code cache doesn't have an SHM_X executable permission to check. | |
| 0 | 3258 assert(UseLargePages && UseISM, "only for ISM large pages"); |
| 3259 | |
| 3260 size_t size = bytes; | |
| 3261 char* retAddr = NULL; | |
| 3262 int shmid; | |
| 3263 key_t ismKey; | |
| 3264 | |
| 3265 bool warn_on_failure = UseISM && | |
| 3266 (!FLAG_IS_DEFAULT(UseLargePages) || | |
| 3267 !FLAG_IS_DEFAULT(UseISM) || | |
| 3268 !FLAG_IS_DEFAULT(LargePageSizeInBytes) | |
| 3269 ); | |
| 3270 char msg[128]; | |
| 3271 | |
| 3272 ismKey = IPC_PRIVATE; | |
| 3273 | |
| 3274 // Create a large shared memory region to attach to based on size. | |
| 3275 // Currently, size is the total size of the heap | |
| 3276 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); | |
| 3277 if (shmid == -1){ | |
| 3278 if (warn_on_failure) { | |
| 3279 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); | |
| 3280 warning(msg); | |
| 3281 } | |
| 3282 return NULL; | |
| 3283 } | |
| 3284 | |
| 3285 // Attach to the region | |
| 3286 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); | |
| 3287 int err = errno; | |
| 3288 | |
| 3289 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
| 3290 // will be deleted when it's detached by shmdt() or when the process | |
| 3291 // terminates. If shmat() is not successful this will remove the shared | |
| 3292 // segment immediately. | |
| 3293 shmctl(shmid, IPC_RMID, NULL); | |
| 3294 | |
| 3295 if (retAddr == (char *) -1) { | |
| 3296 if (warn_on_failure) { | |
| 3297 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); | |
| 3298 warning(msg); | |
| 3299 } | |
| 3300 return NULL; | |
| 3301 } | |
| 3302 | |
| 3303 return retAddr; | |
| 3304 } | |
| 3305 | |
| 3306 bool os::release_memory_special(char* base, size_t bytes) { | |
| 3307 // detaching the SHM segment will also delete it, see reserve_memory_special() | |
| 3308 int rslt = shmdt(base); | |
| 3309 return rslt == 0; | |
| 3310 } | |
| 3311 | |
| 3312 size_t os::large_page_size() { | |
| 3313 return _large_page_size; | |
| 3314 } | |
| 3315 | |
| 3316 // MPSS allows application to commit large page memory on demand; with ISM | |
| 3317 // the entire memory region must be allocated as shared memory. | |
| 3318 bool os::can_commit_large_page_memory() { | |
| 3319 return UseISM ? false : true; | |
| 3320 } | |
| 3321 | |
|
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3322 bool os::can_execute_large_page_memory() { |
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3323 return UseISM ? false : true; |
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3324 } |
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3325 |
| 0 | 3326 static int os_sleep(jlong millis, bool interruptible) { |
| 3327 const jlong limit = INT_MAX; | |
| 3328 jlong prevtime; | |
| 3329 int res; | |
| 3330 | |
| 3331 while (millis > limit) { | |
| 3332 if ((res = os_sleep(limit, interruptible)) != OS_OK) | |
| 3333 return res; | |
| 3334 millis -= limit; | |
| 3335 } | |
| 3336 | |
| 3337 // Restart interrupted polls with new parameters until the proper delay | |
| 3338 // has been completed. | |
| 3339 | |
| 3340 prevtime = getTimeMillis(); | |
| 3341 | |
| 3342 while (millis > 0) { | |
| 3343 jlong newtime; | |
| 3344 | |
| 3345 if (!interruptible) { | |
| 3346 // Following assert fails for os::yield_all: | |
| 3347 // assert(!thread->is_Java_thread(), "must not be java thread"); | |
| 3348 res = poll(NULL, 0, millis); | |
| 3349 } else { | |
| 3350 JavaThread *jt = JavaThread::current(); | |
| 3351 | |
| 3352 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, | |
| 3353 os::Solaris::clear_interrupted); | |
| 3354 } | |
| 3355 | |
| 3356 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for | |
| 3357 // thread.Interrupt. | |
| 3358 | |
| 3359 if((res == OS_ERR) && (errno == EINTR)) { | |
| 3360 newtime = getTimeMillis(); | |
| 3361 assert(newtime >= prevtime, "time moving backwards"); | |
| 3362 /* Doing prevtime and newtime in microseconds doesn't help precision, | |
| 3363 and trying to round up to avoid lost milliseconds can result in a | |
| 3364 too-short delay. */ | |
| 3365 millis -= newtime - prevtime; | |
| 3366 if(millis <= 0) | |
| 3367 return OS_OK; | |
| 3368 prevtime = newtime; | |
| 3369 } else | |
| 3370 return res; | |
| 3371 } | |
| 3372 | |
| 3373 return OS_OK; | |
| 3374 } | |
| 3375 | |
| 3376 // Read calls from inside the vm need to perform state transitions | |
| 3377 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
| 3378 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); | |
| 3379 } | |
| 3380 | |
| 3381 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
| 3382 assert(thread == Thread::current(), "thread consistency check"); | |
| 3383 | |
| 3384 // TODO-FIXME: this should be removed. | |
| 3385 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock | |
| 3386 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate | |
| 3387 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving | |
| 3388 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel | |
| 3389 // is fooled into believing that the system is making progress. In the code below we block the | |
| 3390 // the watcher thread while safepoint is in progress so that it would not appear as though the | |
| 3391 // system is making progress. | |
| 3392 if (!Solaris::T2_libthread() && | |
| 3393 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { | |
| 3394 // We now try to acquire the threads lock. Since this lock is held by the VM thread during | |
| 3395 // the entire safepoint, the watcher thread will line up here during the safepoint. | |
| 3396 Threads_lock->lock_without_safepoint_check(); | |
| 3397 Threads_lock->unlock(); | |
| 3398 } | |
| 3399 | |
| 3400 if (thread->is_Java_thread()) { | |
| 3401 // This is a JavaThread so we honor the _thread_blocked protocol | |
| 3402 // even for sleeps of 0 milliseconds. This was originally done | |
| 3403 // as a workaround for bug 4338139. However, now we also do it | |
| 3404 // to honor the suspend-equivalent protocol. | |
| 3405 | |
| 3406 JavaThread *jt = (JavaThread *) thread; | |
| 3407 ThreadBlockInVM tbivm(jt); | |
| 3408 | |
| 3409 jt->set_suspend_equivalent(); | |
| 3410 // cleared by handle_special_suspend_equivalent_condition() or | |
| 3411 // java_suspend_self() via check_and_wait_while_suspended() | |
| 3412 | |
| 3413 int ret_code; | |
| 3414 if (millis <= 0) { | |
| 3415 thr_yield(); | |
| 3416 ret_code = 0; | |
| 3417 } else { | |
| 3418 // The original sleep() implementation did not create an | |
| 3419 // OSThreadWaitState helper for sleeps of 0 milliseconds. | |
| 3420 // I'm preserving that decision for now. | |
| 3421 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
| 3422 | |
| 3423 ret_code = os_sleep(millis, interruptible); | |
| 3424 } | |
| 3425 | |
| 3426 // were we externally suspended while we were waiting? | |
| 3427 jt->check_and_wait_while_suspended(); | |
| 3428 | |
| 3429 return ret_code; | |
| 3430 } | |
| 3431 | |
| 3432 // non-JavaThread from this point on: | |
| 3433 | |
| 3434 if (millis <= 0) { | |
| 3435 thr_yield(); | |
| 3436 return 0; | |
| 3437 } | |
| 3438 | |
| 3439 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 3440 | |
| 3441 return os_sleep(millis, interruptible); | |
| 3442 } | |
| 3443 | |
| 3444 int os::naked_sleep() { | |
| 3445 // %% make the sleep time an integer flag. for now use 1 millisec. | |
| 3446 return os_sleep(1, false); | |
| 3447 } | |
| 3448 | |
| 3449 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
| 3450 void os::infinite_sleep() { | |
| 3451 while (true) { // sleep forever ... | |
| 3452 ::sleep(100); // ... 100 seconds at a time | |
| 3453 } | |
| 3454 } | |
| 3455 | |
| 3456 // Used to convert frequent JVM_Yield() to nops | |
| 3457 bool os::dont_yield() { | |
| 3458 if (DontYieldALot) { | |
| 3459 static hrtime_t last_time = 0; | |
| 3460 hrtime_t diff = getTimeNanos() - last_time; | |
| 3461 | |
| 3462 if (diff < DontYieldALotInterval * 1000000) | |
| 3463 return true; | |
| 3464 | |
| 3465 last_time += diff; | |
| 3466 | |
| 3467 return false; | |
| 3468 } | |
| 3469 else { | |
| 3470 return false; | |
| 3471 } | |
| 3472 } | |
| 3473 | |
| 3474 // Caveat: Solaris os::yield() causes a thread-state transition whereas | |
| 3475 // the linux and win32 implementations do not. This should be checked. | |
| 3476 | |
| 3477 void os::yield() { | |
| 3478 // Yields to all threads with same or greater priority | |
| 3479 os::sleep(Thread::current(), 0, false); | |
| 3480 } | |
| 3481 | |
| 3482 // Note that yield semantics are defined by the scheduling class to which | |
| 3483 // the thread currently belongs. Typically, yield will _not yield to | |
| 3484 // other equal or higher priority threads that reside on the dispatch queues | |
| 3485 // of other CPUs. | |
| 3486 | |
| 3487 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } | |
| 3488 | |
| 3489 | |
| 3490 // On Solaris we found that yield_all doesn't always yield to all other threads. | |
| 3491 // There have been cases where there is a thread ready to execute but it doesn't | |
| 3492 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. | |
| 3493 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a | |
| 3494 // SIGWAITING signal which will cause a new lwp to be created. So we count the | |
| 3495 // number of times yield_all is called in the one loop and increase the sleep | |
| 3496 // time after 8 attempts. If this fails too we increase the concurrency level | |
| 3497 // so that the starving thread would get an lwp | |
| 3498 | |
| 3499 void os::yield_all(int attempts) { | |
| 3500 // Yields to all threads, including threads with lower priorities | |
| 3501 if (attempts == 0) { | |
| 3502 os::sleep(Thread::current(), 1, false); | |
| 3503 } else { | |
| 3504 int iterations = attempts % 30; | |
| 3505 if (iterations == 0 && !os::Solaris::T2_libthread()) { | |
| 3506 // thr_setconcurrency and _getconcurrency make sense only under T1. | |
| 3507 int noofLWPS = thr_getconcurrency(); | |
| 3508 if (noofLWPS < (Threads::number_of_threads() + 2)) { | |
| 3509 thr_setconcurrency(thr_getconcurrency() + 1); | |
| 3510 } | |
| 3511 } else if (iterations < 25) { | |
| 3512 os::sleep(Thread::current(), 1, false); | |
| 3513 } else { | |
| 3514 os::sleep(Thread::current(), 10, false); | |
| 3515 } | |
| 3516 } | |
| 3517 } | |
| 3518 | |
| 3519 // Called from the tight loops to possibly influence time-sharing heuristics | |
| 3520 void os::loop_breaker(int attempts) { | |
| 3521 os::yield_all(attempts); | |
| 3522 } | |
| 3523 | |
| 3524 | |
| 3525 // Interface for setting lwp priorities. If we are using T2 libthread, | |
| 3526 // which forces the use of BoundThreads or we manually set UseBoundThreads, | |
| 3527 // all of our threads will be assigned to real lwp's. Using the thr_setprio | |
| 3528 // function is meaningless in this mode so we must adjust the real lwp's priority | |
| 3529 // The routines below implement the getting and setting of lwp priorities. | |
| 3530 // | |
| 3531 // Note: There are three priority scales used on Solaris. Java priotities | |
| 3532 // which range from 1 to 10, libthread "thr_setprio" scale which range | |
| 3533 // from 0 to 127, and the current scheduling class of the process we | |
| 3534 // are running in. This is typically from -60 to +60. | |
| 3535 // The setting of the lwp priorities in done after a call to thr_setprio | |
| 3536 // so Java priorities are mapped to libthread priorities and we map from | |
| 3537 // the latter to lwp priorities. We don't keep priorities stored in | |
| 3538 // Java priorities since some of our worker threads want to set priorities | |
| 3539 // higher than all Java threads. | |
| 3540 // | |
| 3541 // For related information: | |
| 3542 // (1) man -s 2 priocntl | |
| 3543 // (2) man -s 4 priocntl | |
| 3544 // (3) man dispadmin | |
| 3545 // = librt.so | |
| 3546 // = libthread/common/rtsched.c - thrp_setlwpprio(). | |
| 3547 // = ps -cL <pid> ... to validate priority. | |
| 3548 // = sched_get_priority_min and _max | |
| 3549 // pthread_create | |
| 3550 // sched_setparam | |
| 3551 // pthread_setschedparam | |
| 3552 // | |
| 3553 // Assumptions: | |
| 3554 // + We assume that all threads in the process belong to the same | |
| 3555 // scheduling class. IE. an homogenous process. | |
| 3556 // + Must be root or in IA group to change change "interactive" attribute. | |
| 3557 // Priocntl() will fail silently. The only indication of failure is when | |
| 3558 // we read-back the value and notice that it hasn't changed. | |
| 3559 // + Interactive threads enter the runq at the head, non-interactive at the tail. | |
| 3560 // + For RT, change timeslice as well. Invariant: | |
| 3561 // constant "priority integral" | |
| 3562 // Konst == TimeSlice * (60-Priority) | |
| 3563 // Given a priority, compute appropriate timeslice. | |
| 3564 // + Higher numerical values have higher priority. | |
| 3565 | |
| 3566 // sched class attributes | |
| 3567 typedef struct { | |
| 3568 int schedPolicy; // classID | |
| 3569 int maxPrio; | |
| 3570 int minPrio; | |
| 3571 } SchedInfo; | |
| 3572 | |
| 3573 | |
| 3574 static SchedInfo tsLimits, iaLimits, rtLimits; | |
| 3575 | |
| 3576 #ifdef ASSERT | |
| 3577 static int ReadBackValidate = 1; | |
| 3578 #endif | |
| 3579 static int myClass = 0; | |
| 3580 static int myMin = 0; | |
| 3581 static int myMax = 0; | |
| 3582 static int myCur = 0; | |
| 3583 static bool priocntl_enable = false; | |
| 3584 | |
| 3585 | |
| 3586 // Call the version of priocntl suitable for all supported versions | |
| 3587 // of Solaris. We need to call through this wrapper so that we can | |
| 3588 // build on Solaris 9 and run on Solaris 8, 9 and 10. | |
| 3589 // | |
| 3590 // This code should be removed if we ever stop supporting Solaris 8 | |
| 3591 // and earlier releases. | |
| 3592 | |
| 3593 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); | |
| 3594 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); | |
| 3595 static priocntl_type priocntl_ptr = priocntl_stub; | |
| 3596 | |
| 3597 // Stub to set the value of the real pointer, and then call the real | |
| 3598 // function. | |
| 3599 | |
| 3600 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { | |
| 3601 // Try Solaris 8- name only. | |
| 3602 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); | |
| 3603 guarantee(tmp != NULL, "priocntl function not found."); | |
| 3604 priocntl_ptr = tmp; | |
| 3605 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); | |
| 3606 } | |
| 3607 | |
| 3608 | |
| 3609 // lwp_priocntl_init | |
| 3610 // | |
| 3611 // Try to determine the priority scale for our process. | |
| 3612 // | |
| 3613 // Return errno or 0 if OK. | |
| 3614 // | |
| 3615 static | |
| 3616 int lwp_priocntl_init () | |
| 3617 { | |
| 3618 int rslt; | |
| 3619 pcinfo_t ClassInfo; | |
| 3620 pcparms_t ParmInfo; | |
| 3621 int i; | |
| 3622 | |
| 3623 if (!UseThreadPriorities) return 0; | |
| 3624 | |
| 3625 // We are using Bound threads, we need to determine our priority ranges | |
| 3626 if (os::Solaris::T2_libthread() || UseBoundThreads) { | |
| 3627 // If ThreadPriorityPolicy is 1, switch tables | |
| 3628 if (ThreadPriorityPolicy == 1) { | |
| 3629 for (i = 0 ; i < MaxPriority+1; i++) | |
| 3630 os::java_to_os_priority[i] = prio_policy1[i]; | |
| 3631 } | |
| 3632 } | |
| 3633 // Not using Bound Threads, set to ThreadPolicy 1 | |
| 3634 else { | |
| 3635 for ( i = 0 ; i < MaxPriority+1; i++ ) { | |
| 3636 os::java_to_os_priority[i] = prio_policy1[i]; | |
| 3637 } | |
| 3638 return 0; | |
| 3639 } | |
| 3640 | |
| 3641 | |
| 3642 // Get IDs for a set of well-known scheduling classes. | |
| 3643 // TODO-FIXME: GETCLINFO returns the current # of classes in the | |
| 3644 // the system. We should have a loop that iterates over the | |
| 3645 // classID values, which are known to be "small" integers. | |
| 3646 | |
| 3647 strcpy(ClassInfo.pc_clname, "TS"); | |
| 3648 ClassInfo.pc_cid = -1; | |
| 3649 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
| 3650 if (rslt < 0) return errno; | |
| 3651 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); | |
| 3652 tsLimits.schedPolicy = ClassInfo.pc_cid; | |
| 3653 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; | |
| 3654 tsLimits.minPrio = -tsLimits.maxPrio; | |
| 3655 | |
| 3656 strcpy(ClassInfo.pc_clname, "IA"); | |
| 3657 ClassInfo.pc_cid = -1; | |
| 3658 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
| 3659 if (rslt < 0) return errno; | |
| 3660 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); | |
| 3661 iaLimits.schedPolicy = ClassInfo.pc_cid; | |
| 3662 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; | |
| 3663 iaLimits.minPrio = -iaLimits.maxPrio; | |
| 3664 | |
| 3665 strcpy(ClassInfo.pc_clname, "RT"); | |
| 3666 ClassInfo.pc_cid = -1; | |
| 3667 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
| 3668 if (rslt < 0) return errno; | |
| 3669 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); | |
| 3670 rtLimits.schedPolicy = ClassInfo.pc_cid; | |
| 3671 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; | |
| 3672 rtLimits.minPrio = 0; | |
| 3673 | |
| 3674 | |
| 3675 // Query our "current" scheduling class. | |
| 3676 // This will normally be IA,TS or, rarely, RT. | |
| 3677 memset (&ParmInfo, 0, sizeof(ParmInfo)); | |
| 3678 ParmInfo.pc_cid = PC_CLNULL; | |
| 3679 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); | |
| 3680 if ( rslt < 0 ) return errno; | |
| 3681 myClass = ParmInfo.pc_cid; | |
| 3682 | |
| 3683 // We now know our scheduling classId, get specific information | |
| 3684 // the class. | |
| 3685 ClassInfo.pc_cid = myClass; | |
| 3686 ClassInfo.pc_clname[0] = 0; | |
| 3687 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); | |
| 3688 if ( rslt < 0 ) return errno; | |
| 3689 | |
| 3690 if (ThreadPriorityVerbose) | |
| 3691 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); | |
| 3692 | |
| 3693 memset(&ParmInfo, 0, sizeof(pcparms_t)); | |
| 3694 ParmInfo.pc_cid = PC_CLNULL; | |
| 3695 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); | |
| 3696 if (rslt < 0) return errno; | |
| 3697 | |
| 3698 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
| 3699 myMin = rtLimits.minPrio; | |
| 3700 myMax = rtLimits.maxPrio; | |
| 3701 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
| 3702 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; | |
| 3703 myMin = iaLimits.minPrio; | |
| 3704 myMax = iaLimits.maxPrio; | |
| 3705 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict | |
| 3706 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
| 3707 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; | |
| 3708 myMin = tsLimits.minPrio; | |
| 3709 myMax = tsLimits.maxPrio; | |
| 3710 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict | |
| 3711 } else { | |
| 3712 // No clue - punt | |
| 3713 if (ThreadPriorityVerbose) | |
| 3714 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); | |
| 3715 return EINVAL; // no clue, punt | |
| 3716 } | |
| 3717 | |
| 3718 if (ThreadPriorityVerbose) | |
| 3719 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); | |
| 3720 | |
| 3721 priocntl_enable = true; // Enable changing priorities | |
| 3722 return 0; | |
| 3723 } | |
| 3724 | |
| 3725 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) | |
| 3726 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) | |
| 3727 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) | |
| 3728 | |
| 3729 | |
| 3730 // scale_to_lwp_priority | |
| 3731 // | |
| 3732 // Convert from the libthread "thr_setprio" scale to our current | |
| 3733 // lwp scheduling class scale. | |
| 3734 // | |
| 3735 static | |
| 3736 int scale_to_lwp_priority (int rMin, int rMax, int x) | |
| 3737 { | |
| 3738 int v; | |
| 3739 | |
| 3740 if (x == 127) return rMax; // avoid round-down | |
| 3741 v = (((x*(rMax-rMin)))/128)+rMin; | |
| 3742 return v; | |
| 3743 } | |
| 3744 | |
| 3745 | |
| 3746 // set_lwp_priority | |
| 3747 // | |
| 3748 // Set the priority of the lwp. This call should only be made | |
| 3749 // when using bound threads (T2 threads are bound by default). | |
| 3750 // | |
| 3751 int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) | |
| 3752 { | |
| 3753 int rslt; | |
| 3754 int Actual, Expected, prv; | |
| 3755 pcparms_t ParmInfo; // for GET-SET | |
| 3756 #ifdef ASSERT | |
| 3757 pcparms_t ReadBack; // for readback | |
| 3758 #endif | |
| 3759 | |
| 3760 // Set priority via PC_GETPARMS, update, PC_SETPARMS | |
| 3761 // Query current values. | |
| 3762 // TODO: accelerate this by eliminating the PC_GETPARMS call. | |
| 3763 // Cache "pcparms_t" in global ParmCache. | |
| 3764 // TODO: elide set-to-same-value | |
| 3765 | |
| 3766 // If something went wrong on init, don't change priorities. | |
| 3767 if ( !priocntl_enable ) { | |
| 3768 if (ThreadPriorityVerbose) | |
| 3769 tty->print_cr("Trying to set priority but init failed, ignoring"); | |
| 3770 return EINVAL; | |
| 3771 } | |
| 3772 | |
| 3773 | |
| 3774 // If lwp hasn't started yet, just return | |
| 3775 // the _start routine will call us again. | |
| 3776 if ( lwpid <= 0 ) { | |
| 3777 if (ThreadPriorityVerbose) { | |
| 3778 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", | |
| 3779 ThreadID, newPrio); | |
| 3780 } | |
| 3781 return 0; | |
| 3782 } | |
| 3783 | |
| 3784 if (ThreadPriorityVerbose) { | |
| 3785 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", | |
| 3786 ThreadID, lwpid, newPrio); | |
| 3787 } | |
| 3788 | |
| 3789 memset(&ParmInfo, 0, sizeof(pcparms_t)); | |
| 3790 ParmInfo.pc_cid = PC_CLNULL; | |
| 3791 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); | |
| 3792 if (rslt < 0) return errno; | |
| 3793 | |
| 3794 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
| 3795 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; | |
| 3796 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); | |
| 3797 rtInfo->rt_tqsecs = RT_NOCHANGE; | |
| 3798 rtInfo->rt_tqnsecs = RT_NOCHANGE; | |
| 3799 if (ThreadPriorityVerbose) { | |
| 3800 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); | |
| 3801 } | |
| 3802 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
| 3803 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; | |
| 3804 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); | |
| 3805 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); | |
| 3806 iaInfo->ia_uprilim = IA_NOCHANGE; | |
| 3807 iaInfo->ia_mode = IA_NOCHANGE; | |
| 3808 if (ThreadPriorityVerbose) { | |
| 3809 tty->print_cr ("IA: [%d...%d] %d->%d\n", | |
| 3810 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); | |
| 3811 } | |
| 3812 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
| 3813 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; | |
| 3814 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); | |
| 3815 prv = tsInfo->ts_upri; | |
| 3816 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); | |
| 3817 tsInfo->ts_uprilim = IA_NOCHANGE; | |
| 3818 if (ThreadPriorityVerbose) { | |
| 3819 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", | |
| 3820 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); | |
| 3821 } | |
| 3822 if (prv == tsInfo->ts_upri) return 0; | |
| 3823 } else { | |
| 3824 if ( ThreadPriorityVerbose ) { | |
| 3825 tty->print_cr ("Unknown scheduling class\n"); | |
| 3826 } | |
| 3827 return EINVAL; // no clue, punt | |
| 3828 } | |
| 3829 | |
| 3830 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); | |
| 3831 if (ThreadPriorityVerbose && rslt) { | |
| 3832 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); | |
| 3833 } | |
| 3834 if (rslt < 0) return errno; | |
| 3835 | |
| 3836 #ifdef ASSERT | |
| 3837 // Sanity check: read back what we just attempted to set. | |
| 3838 // In theory it could have changed in the interim ... | |
| 3839 // | |
| 3840 // The priocntl system call is tricky. | |
| 3841 // Sometimes it'll validate the priority value argument and | |
| 3842 // return EINVAL if unhappy. At other times it fails silently. | |
| 3843 // Readbacks are prudent. | |
| 3844 | |
| 3845 if (!ReadBackValidate) return 0; | |
| 3846 | |
| 3847 memset(&ReadBack, 0, sizeof(pcparms_t)); | |
| 3848 ReadBack.pc_cid = PC_CLNULL; | |
| 3849 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); | |
| 3850 assert(rslt >= 0, "priocntl failed"); | |
| 3851 Actual = Expected = 0xBAD; | |
| 3852 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); | |
| 3853 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
| 3854 Actual = RTPRI(ReadBack)->rt_pri; | |
| 3855 Expected = RTPRI(ParmInfo)->rt_pri; | |
| 3856 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
| 3857 Actual = IAPRI(ReadBack)->ia_upri; | |
| 3858 Expected = IAPRI(ParmInfo)->ia_upri; | |
| 3859 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
| 3860 Actual = TSPRI(ReadBack)->ts_upri; | |
| 3861 Expected = TSPRI(ParmInfo)->ts_upri; | |
| 3862 } else { | |
| 3863 if ( ThreadPriorityVerbose ) { | |
| 3864 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); | |
| 3865 } | |
| 3866 } | |
| 3867 | |
| 3868 if (Actual != Expected) { | |
| 3869 if ( ThreadPriorityVerbose ) { | |
| 3870 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", | |
| 3871 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); | |
| 3872 } | |
| 3873 } | |
| 3874 #endif | |
| 3875 | |
| 3876 return 0; | |
| 3877 } | |
| 3878 | |
| 3879 | |
| 3880 | |
| 3881 // Solaris only gives access to 128 real priorities at a time, | |
| 3882 // so we expand Java's ten to fill this range. This would be better | |
| 3883 // if we dynamically adjusted relative priorities. | |
| 3884 // | |
| 3885 // The ThreadPriorityPolicy option allows us to select 2 different | |
| 3886 // priority scales. | |
| 3887 // | |
| 3888 // ThreadPriorityPolicy=0 | |
| 3889 // Since the Solaris' default priority is MaximumPriority, we do not | |
| 3890 // set a priority lower than Max unless a priority lower than | |
| 3891 // NormPriority is requested. | |
| 3892 // | |
| 3893 // ThreadPriorityPolicy=1 | |
| 3894 // This mode causes the priority table to get filled with | |
| 3895 // linear values. NormPriority get's mapped to 50% of the | |
| 3896 // Maximum priority an so on. This will cause VM threads | |
| 3897 // to get unfair treatment against other Solaris processes | |
| 3898 // which do not explicitly alter their thread priorities. | |
| 3899 // | |
| 3900 | |
| 3901 | |
| 3902 int os::java_to_os_priority[MaxPriority + 1] = { | |
| 3903 -99999, // 0 Entry should never be used | |
| 3904 | |
| 3905 0, // 1 MinPriority | |
| 3906 32, // 2 | |
| 3907 64, // 3 | |
| 3908 | |
| 3909 96, // 4 | |
| 3910 127, // 5 NormPriority | |
| 3911 127, // 6 | |
| 3912 | |
| 3913 127, // 7 | |
| 3914 127, // 8 | |
| 3915 127, // 9 NearMaxPriority | |
| 3916 | |
| 3917 127 // 10 MaxPriority | |
| 3918 }; | |
| 3919 | |
| 3920 | |
| 3921 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
| 3922 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); | |
| 3923 if ( !UseThreadPriorities ) return OS_OK; | |
| 3924 int status = thr_setprio(thread->osthread()->thread_id(), newpri); | |
| 3925 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) | |
| 3926 status |= (set_lwp_priority (thread->osthread()->thread_id(), | |
| 3927 thread->osthread()->lwp_id(), newpri )); | |
| 3928 return (status == 0) ? OS_OK : OS_ERR; | |
| 3929 } | |
| 3930 | |
| 3931 | |
| 3932 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
| 3933 int p; | |
| 3934 if ( !UseThreadPriorities ) { | |
| 3935 *priority_ptr = NormalPriority; | |
| 3936 return OS_OK; | |
| 3937 } | |
| 3938 int status = thr_getprio(thread->osthread()->thread_id(), &p); | |
| 3939 if (status != 0) { | |
| 3940 return OS_ERR; | |
| 3941 } | |
| 3942 *priority_ptr = p; | |
| 3943 return OS_OK; | |
| 3944 } | |
| 3945 | |
| 3946 | |
| 3947 // Hint to the underlying OS that a task switch would not be good. | |
| 3948 // Void return because it's a hint and can fail. | |
| 3949 void os::hint_no_preempt() { | |
| 3950 schedctl_start(schedctl_init()); | |
| 3951 } | |
| 3952 | |
| 3953 void os::interrupt(Thread* thread) { | |
| 3954 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); | |
| 3955 | |
| 3956 OSThread* osthread = thread->osthread(); | |
| 3957 | |
| 3958 int isInterrupted = osthread->interrupted(); | |
| 3959 if (!isInterrupted) { | |
| 3960 osthread->set_interrupted(true); | |
| 3961 OrderAccess::fence(); | |
| 3962 // os::sleep() is implemented with either poll (NULL,0,timeout) or | |
| 3963 // by parking on _SleepEvent. If the former, thr_kill will unwedge | |
| 3964 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. | |
| 3965 ParkEvent * const slp = thread->_SleepEvent ; | |
| 3966 if (slp != NULL) slp->unpark() ; | |
| 3967 } | |
| 3968 | |
| 3969 // For JSR166: unpark after setting status but before thr_kill -dl | |
| 3970 if (thread->is_Java_thread()) { | |
| 3971 ((JavaThread*)thread)->parker()->unpark(); | |
| 3972 } | |
| 3973 | |
| 3974 // Handle interruptible wait() ... | |
| 3975 ParkEvent * const ev = thread->_ParkEvent ; | |
| 3976 if (ev != NULL) ev->unpark() ; | |
| 3977 | |
| 3978 // When events are used everywhere for os::sleep, then this thr_kill | |
| 3979 // will only be needed if UseVMInterruptibleIO is true. | |
| 3980 | |
| 3981 if (!isInterrupted) { | |
| 3982 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); | |
| 3983 assert_status(status == 0, status, "thr_kill"); | |
| 3984 | |
| 3985 // Bump thread interruption counter | |
| 3986 RuntimeService::record_thread_interrupt_signaled_count(); | |
| 3987 } | |
| 3988 } | |
| 3989 | |
| 3990 | |
| 3991 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 3992 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); | |
| 3993 | |
| 3994 OSThread* osthread = thread->osthread(); | |
| 3995 | |
| 3996 bool res = osthread->interrupted(); | |
| 3997 | |
| 3998 // NOTE that since there is no "lock" around these two operations, | |
| 3999 // there is the possibility that the interrupted flag will be | |
| 4000 // "false" but that the interrupt event will be set. This is | |
| 4001 // intentional. The effect of this is that Object.wait() will appear | |
| 4002 // to have a spurious wakeup, which is not harmful, and the | |
| 4003 // possibility is so rare that it is not worth the added complexity | |
| 4004 // to add yet another lock. It has also been recommended not to put | |
| 4005 // the interrupted flag into the os::Solaris::Event structure, | |
| 4006 // because it hides the issue. | |
| 4007 if (res && clear_interrupted) { | |
| 4008 osthread->set_interrupted(false); | |
| 4009 } | |
| 4010 return res; | |
| 4011 } | |
| 4012 | |
| 4013 | |
| 4014 void os::print_statistics() { | |
| 4015 } | |
| 4016 | |
| 4017 int os::message_box(const char* title, const char* message) { | |
| 4018 int i; | |
| 4019 fdStream err(defaultStream::error_fd()); | |
| 4020 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 4021 err.cr(); | |
| 4022 err.print_raw_cr(title); | |
| 4023 for (i = 0; i < 78; i++) err.print_raw("-"); | |
| 4024 err.cr(); | |
| 4025 err.print_raw_cr(message); | |
| 4026 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 4027 err.cr(); | |
| 4028 | |
| 4029 char buf[16]; | |
| 4030 // Prevent process from exiting upon "read error" without consuming all CPU | |
| 4031 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
| 4032 | |
| 4033 return buf[0] == 'y' || buf[0] == 'Y'; | |
| 4034 } | |
| 4035 | |
| 4036 // A lightweight implementation that does not suspend the target thread and | |
| 4037 // thus returns only a hint. Used for profiling only! | |
| 4038 ExtendedPC os::get_thread_pc(Thread* thread) { | |
| 4039 // Make sure that it is called by the watcher and the Threads lock is owned. | |
| 4040 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); | |
| 4041 // For now, is only used to profile the VM Thread | |
| 4042 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
| 4043 ExtendedPC epc; | |
| 4044 | |
| 4045 GetThreadPC_Callback cb(ProfileVM_lock); | |
| 4046 OSThread *osthread = thread->osthread(); | |
| 4047 const int time_to_wait = 400; // 400ms wait for initial response | |
| 4048 int status = cb.interrupt(thread, time_to_wait); | |
| 4049 | |
| 4050 if (cb.is_done() ) { | |
| 4051 epc = cb.addr(); | |
| 4052 } else { | |
| 4053 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", | |
| 4054 osthread->thread_id(), status);); | |
| 4055 // epc is already NULL | |
| 4056 } | |
| 4057 return epc; | |
| 4058 } | |
| 4059 | |
| 4060 | |
| 4061 // This does not do anything on Solaris. This is basically a hook for being | |
| 4062 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32. | |
| 4063 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { | |
| 4064 f(value, method, args, thread); | |
| 4065 } | |
| 4066 | |
| 4067 // This routine may be used by user applications as a "hook" to catch signals. | |
| 4068 // The user-defined signal handler must pass unrecognized signals to this | |
| 4069 // routine, and if it returns true (non-zero), then the signal handler must | |
| 4070 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
| 4071 // routine will never retun false (zero), but instead will execute a VM panic | |
| 4072 // routine kill the process. | |
| 4073 // | |
| 4074 // If this routine returns false, it is OK to call it again. This allows | |
| 4075 // the user-defined signal handler to perform checks either before or after | |
| 4076 // the VM performs its own checks. Naturally, the user code would be making | |
| 4077 // a serious error if it tried to handle an exception (such as a null check | |
| 4078 // or breakpoint) that the VM was generating for its own correct operation. | |
| 4079 // | |
| 4080 // This routine may recognize any of the following kinds of signals: | |
| 4081 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, | |
| 4082 // os::Solaris::SIGasync | |
| 4083 // It should be consulted by handlers for any of those signals. | |
| 4084 // It explicitly does not recognize os::Solaris::SIGinterrupt | |
| 4085 // | |
| 4086 // The caller of this routine must pass in the three arguments supplied | |
| 4087 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
| 4088 // field of the structure passed to sigaction(). This routine assumes that | |
| 4089 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
| 4090 // | |
| 4091 // Note that the VM will print warnings if it detects conflicting signal | |
| 4092 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
| 4093 // | |
| 4094 extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); | |
| 4095 | |
| 4096 | |
| 4097 void signalHandler(int sig, siginfo_t* info, void* ucVoid) { | |
| 4098 JVM_handle_solaris_signal(sig, info, ucVoid, true); | |
| 4099 } | |
| 4100 | |
| 4101 /* Do not delete - if guarantee is ever removed, a signal handler (even empty) | |
| 4102 is needed to provoke threads blocked on IO to return an EINTR | |
| 4103 Note: this explicitly does NOT call JVM_handle_solaris_signal and | |
| 4104 does NOT participate in signal chaining due to requirement for | |
| 4105 NOT setting SA_RESTART to make EINTR work. */ | |
| 4106 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { | |
| 4107 if (UseSignalChaining) { | |
| 4108 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); | |
| 4109 if (actp && actp->sa_handler) { | |
| 4110 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); | |
| 4111 } | |
| 4112 } | |
| 4113 } | |
| 4114 | |
| 4115 // This boolean allows users to forward their own non-matching signals | |
| 4116 // to JVM_handle_solaris_signal, harmlessly. | |
| 4117 bool os::Solaris::signal_handlers_are_installed = false; | |
| 4118 | |
| 4119 // For signal-chaining | |
| 4120 bool os::Solaris::libjsig_is_loaded = false; | |
| 4121 typedef struct sigaction *(*get_signal_t)(int); | |
| 4122 get_signal_t os::Solaris::get_signal_action = NULL; | |
| 4123 | |
| 4124 struct sigaction* os::Solaris::get_chained_signal_action(int sig) { | |
| 4125 struct sigaction *actp = NULL; | |
| 4126 | |
| 4127 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { | |
| 4128 // Retrieve the old signal handler from libjsig | |
| 4129 actp = (*get_signal_action)(sig); | |
| 4130 } | |
| 4131 if (actp == NULL) { | |
| 4132 // Retrieve the preinstalled signal handler from jvm | |
| 4133 actp = get_preinstalled_handler(sig); | |
| 4134 } | |
| 4135 | |
| 4136 return actp; | |
| 4137 } | |
| 4138 | |
| 4139 static bool call_chained_handler(struct sigaction *actp, int sig, | |
| 4140 siginfo_t *siginfo, void *context) { | |
| 4141 // Call the old signal handler | |
| 4142 if (actp->sa_handler == SIG_DFL) { | |
| 4143 // It's more reasonable to let jvm treat it as an unexpected exception | |
| 4144 // instead of taking the default action. | |
| 4145 return false; | |
| 4146 } else if (actp->sa_handler != SIG_IGN) { | |
| 4147 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
| 4148 // automaticlly block the signal | |
| 4149 sigaddset(&(actp->sa_mask), sig); | |
| 4150 } | |
| 4151 | |
| 4152 sa_handler_t hand; | |
| 4153 sa_sigaction_t sa; | |
| 4154 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; | |
| 4155 // retrieve the chained handler | |
| 4156 if (siginfo_flag_set) { | |
| 4157 sa = actp->sa_sigaction; | |
| 4158 } else { | |
| 4159 hand = actp->sa_handler; | |
| 4160 } | |
| 4161 | |
| 4162 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
| 4163 actp->sa_handler = SIG_DFL; | |
| 4164 } | |
| 4165 | |
| 4166 // try to honor the signal mask | |
| 4167 sigset_t oset; | |
| 4168 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
| 4169 | |
| 4170 // call into the chained handler | |
| 4171 if (siginfo_flag_set) { | |
| 4172 (*sa)(sig, siginfo, context); | |
| 4173 } else { | |
| 4174 (*hand)(sig); | |
| 4175 } | |
| 4176 | |
| 4177 // restore the signal mask | |
| 4178 thr_sigsetmask(SIG_SETMASK, &oset, 0); | |
| 4179 } | |
| 4180 // Tell jvm's signal handler the signal is taken care of. | |
| 4181 return true; | |
| 4182 } | |
| 4183 | |
| 4184 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
| 4185 bool chained = false; | |
| 4186 // signal-chaining | |
| 4187 if (UseSignalChaining) { | |
| 4188 struct sigaction *actp = get_chained_signal_action(sig); | |
| 4189 if (actp != NULL) { | |
| 4190 chained = call_chained_handler(actp, sig, siginfo, context); | |
| 4191 } | |
| 4192 } | |
| 4193 return chained; | |
| 4194 } | |
| 4195 | |
| 4196 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { | |
| 4197 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); | |
| 4198 if (preinstalled_sigs[sig] != 0) { | |
| 4199 return &chainedsigactions[sig]; | |
| 4200 } | |
| 4201 return NULL; | |
| 4202 } | |
| 4203 | |
| 4204 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
| 4205 | |
| 4206 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); | |
| 4207 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); | |
| 4208 chainedsigactions[sig] = oldAct; | |
| 4209 preinstalled_sigs[sig] = 1; | |
| 4210 } | |
| 4211 | |
| 4212 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { | |
| 4213 // Check for overwrite. | |
| 4214 struct sigaction oldAct; | |
| 4215 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
| 4216 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4217 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4218 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
| 4219 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
| 4220 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { | |
| 4221 if (AllowUserSignalHandlers || !set_installed) { | |
| 4222 // Do not overwrite; user takes responsibility to forward to us. | |
| 4223 return; | |
| 4224 } else if (UseSignalChaining) { | |
| 4225 if (oktochain) { | |
| 4226 // save the old handler in jvm | |
| 4227 save_preinstalled_handler(sig, oldAct); | |
| 4228 } else { | |
| 4229 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); | |
| 4230 } | |
| 4231 // libjsig also interposes the sigaction() call below and saves the | |
| 4232 // old sigaction on it own. | |
| 4233 } else { | |
| 4234 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); | |
| 4235 } | |
| 4236 } | |
| 4237 | |
| 4238 struct sigaction sigAct; | |
| 4239 sigfillset(&(sigAct.sa_mask)); | |
| 4240 sigAct.sa_handler = SIG_DFL; | |
| 4241 | |
| 4242 sigAct.sa_sigaction = signalHandler; | |
| 4243 // Handle SIGSEGV on alternate signal stack if | |
| 4244 // not using stack banging | |
| 4245 if (!UseStackBanging && sig == SIGSEGV) { | |
| 4246 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; | |
| 4247 // Interruptible i/o requires SA_RESTART cleared so EINTR | |
| 4248 // is returned instead of restarting system calls | |
| 4249 } else if (sig == os::Solaris::SIGinterrupt()) { | |
| 4250 sigemptyset(&sigAct.sa_mask); | |
| 4251 sigAct.sa_handler = NULL; | |
| 4252 sigAct.sa_flags = SA_SIGINFO; | |
| 4253 sigAct.sa_sigaction = sigINTRHandler; | |
| 4254 } else { | |
| 4255 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; | |
| 4256 } | |
| 4257 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); | |
| 4258 | |
| 4259 sigaction(sig, &sigAct, &oldAct); | |
| 4260 | |
| 4261 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4262 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4263 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
| 4264 } | |
| 4265 | |
| 4266 | |
| 4267 #define DO_SIGNAL_CHECK(sig) \ | |
| 4268 if (!sigismember(&check_signal_done, sig)) \ | |
| 4269 os::Solaris::check_signal_handler(sig) | |
| 4270 | |
| 4271 // This method is a periodic task to check for misbehaving JNI applications | |
| 4272 // under CheckJNI, we can add any periodic checks here | |
| 4273 | |
| 4274 void os::run_periodic_checks() { | |
| 4275 // A big source of grief is hijacking virt. addr 0x0 on Solaris, | |
| 4276 // thereby preventing a NULL checks. | |
| 4277 if(!check_addr0_done) check_addr0_done = check_addr0(tty); | |
| 4278 | |
| 4279 if (check_signals == false) return; | |
| 4280 | |
| 4281 // SEGV and BUS if overridden could potentially prevent | |
| 4282 // generation of hs*.log in the event of a crash, debugging | |
| 4283 // such a case can be very challenging, so we absolutely | |
| 4284 // check for the following for a good measure: | |
| 4285 DO_SIGNAL_CHECK(SIGSEGV); | |
| 4286 DO_SIGNAL_CHECK(SIGILL); | |
| 4287 DO_SIGNAL_CHECK(SIGFPE); | |
| 4288 DO_SIGNAL_CHECK(SIGBUS); | |
| 4289 DO_SIGNAL_CHECK(SIGPIPE); | |
| 4290 DO_SIGNAL_CHECK(SIGXFSZ); | |
| 4291 | |
| 4292 // ReduceSignalUsage allows the user to override these handlers | |
| 4293 // see comments at the very top and jvm_solaris.h | |
| 4294 if (!ReduceSignalUsage) { | |
| 4295 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
| 4296 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
| 4297 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
| 4298 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
| 4299 } | |
| 4300 | |
| 4301 // See comments above for using JVM1/JVM2 and UseAltSigs | |
| 4302 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); | |
| 4303 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); | |
| 4304 | |
| 4305 } | |
| 4306 | |
| 4307 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
| 4308 | |
| 4309 static os_sigaction_t os_sigaction = NULL; | |
| 4310 | |
| 4311 void os::Solaris::check_signal_handler(int sig) { | |
| 4312 char buf[O_BUFLEN]; | |
| 4313 address jvmHandler = NULL; | |
| 4314 | |
| 4315 struct sigaction act; | |
| 4316 if (os_sigaction == NULL) { | |
| 4317 // only trust the default sigaction, in case it has been interposed | |
| 4318 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
| 4319 if (os_sigaction == NULL) return; | |
| 4320 } | |
| 4321 | |
| 4322 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
| 4323 | |
| 4324 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
| 4325 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
| 4326 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
| 4327 | |
| 4328 | |
| 4329 switch(sig) { | |
| 4330 case SIGSEGV: | |
| 4331 case SIGBUS: | |
| 4332 case SIGFPE: | |
| 4333 case SIGPIPE: | |
| 4334 case SIGXFSZ: | |
| 4335 case SIGILL: | |
| 4336 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); | |
| 4337 break; | |
| 4338 | |
| 4339 case SHUTDOWN1_SIGNAL: | |
| 4340 case SHUTDOWN2_SIGNAL: | |
| 4341 case SHUTDOWN3_SIGNAL: | |
| 4342 case BREAK_SIGNAL: | |
| 4343 jvmHandler = (address)user_handler(); | |
| 4344 break; | |
| 4345 | |
| 4346 default: | |
| 4347 int intrsig = os::Solaris::SIGinterrupt(); | |
| 4348 int asynsig = os::Solaris::SIGasync(); | |
| 4349 | |
| 4350 if (sig == intrsig) { | |
| 4351 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); | |
| 4352 } else if (sig == asynsig) { | |
| 4353 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); | |
| 4354 } else { | |
| 4355 return; | |
| 4356 } | |
| 4357 break; | |
| 4358 } | |
| 4359 | |
| 4360 | |
| 4361 if (thisHandler != jvmHandler) { | |
| 4362 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
| 4363 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
| 4364 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
| 4365 // No need to check this sig any longer | |
| 4366 sigaddset(&check_signal_done, sig); | |
| 4367 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { | |
| 4368 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
| 4369 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); | |
| 4370 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
| 4371 // No need to check this sig any longer | |
| 4372 sigaddset(&check_signal_done, sig); | |
| 4373 } | |
| 4374 | |
| 4375 // Print all the signal handler state | |
| 4376 if (sigismember(&check_signal_done, sig)) { | |
| 4377 print_signal_handlers(tty, buf, O_BUFLEN); | |
| 4378 } | |
| 4379 | |
| 4380 } | |
| 4381 | |
| 4382 void os::Solaris::install_signal_handlers() { | |
| 4383 bool libjsigdone = false; | |
| 4384 signal_handlers_are_installed = true; | |
| 4385 | |
| 4386 // signal-chaining | |
| 4387 typedef void (*signal_setting_t)(); | |
| 4388 signal_setting_t begin_signal_setting = NULL; | |
| 4389 signal_setting_t end_signal_setting = NULL; | |
| 4390 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4391 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
| 4392 if (begin_signal_setting != NULL) { | |
| 4393 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4394 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
| 4395 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
| 4396 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
| 4397 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, | |
| 4398 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); | |
| 4399 libjsig_is_loaded = true; | |
| 4400 if (os::Solaris::get_libjsig_version != NULL) { | |
| 4401 libjsigversion = (*os::Solaris::get_libjsig_version)(); | |
| 4402 } | |
| 4403 assert(UseSignalChaining, "should enable signal-chaining"); | |
| 4404 } | |
| 4405 if (libjsig_is_loaded) { | |
| 4406 // Tell libjsig jvm is setting signal handlers | |
| 4407 (*begin_signal_setting)(); | |
| 4408 } | |
| 4409 | |
| 4410 set_signal_handler(SIGSEGV, true, true); | |
| 4411 set_signal_handler(SIGPIPE, true, true); | |
| 4412 set_signal_handler(SIGXFSZ, true, true); | |
| 4413 set_signal_handler(SIGBUS, true, true); | |
| 4414 set_signal_handler(SIGILL, true, true); | |
| 4415 set_signal_handler(SIGFPE, true, true); | |
| 4416 | |
| 4417 | |
| 4418 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { | |
| 4419 | |
| 4420 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so | |
| 4421 // can not register overridable signals which might be > 32 | |
| 4422 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { | |
| 4423 // Tell libjsig jvm has finished setting signal handlers | |
| 4424 (*end_signal_setting)(); | |
| 4425 libjsigdone = true; | |
| 4426 } | |
| 4427 } | |
| 4428 | |
| 4429 // Never ok to chain our SIGinterrupt | |
| 4430 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); | |
| 4431 set_signal_handler(os::Solaris::SIGasync(), true, true); | |
| 4432 | |
| 4433 if (libjsig_is_loaded && !libjsigdone) { | |
| 4434 // Tell libjsig jvm finishes setting signal handlers | |
| 4435 (*end_signal_setting)(); | |
| 4436 } | |
| 4437 | |
| 4438 // We don't activate signal checker if libjsig is in place, we trust ourselves | |
| 4439 // and if UserSignalHandler is installed all bets are off | |
| 4440 if (CheckJNICalls) { | |
| 4441 if (libjsig_is_loaded) { | |
| 4442 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); | |
| 4443 check_signals = false; | |
| 4444 } | |
| 4445 if (AllowUserSignalHandlers) { | |
| 4446 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); | |
| 4447 check_signals = false; | |
| 4448 } | |
| 4449 } | |
| 4450 } | |
| 4451 | |
| 4452 | |
| 4453 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); | |
| 4454 | |
| 4455 const char * signames[] = { | |
| 4456 "SIG0", | |
| 4457 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", | |
| 4458 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", | |
| 4459 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", | |
| 4460 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", | |
| 4461 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", | |
| 4462 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", | |
| 4463 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", | |
| 4464 "SIGCANCEL", "SIGLOST" | |
| 4465 }; | |
| 4466 | |
| 4467 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
| 4468 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
| 4469 // signal | |
| 4470 if (exception_code < sizeof(signames)/sizeof(const char*)) { | |
| 4471 jio_snprintf(buf, size, "%s", signames[exception_code]); | |
| 4472 } else { | |
| 4473 jio_snprintf(buf, size, "SIG%d", exception_code); | |
| 4474 } | |
| 4475 return buf; | |
| 4476 } else { | |
| 4477 return NULL; | |
| 4478 } | |
| 4479 } | |
| 4480 | |
| 4481 // (Static) wrappers for the new libthread API | |
| 4482 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; | |
| 4483 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; | |
| 4484 int_fnP_thread_t_i os::Solaris::_thr_setmutator; | |
| 4485 int_fnP_thread_t os::Solaris::_thr_suspend_mutator; | |
| 4486 int_fnP_thread_t os::Solaris::_thr_continue_mutator; | |
| 4487 | |
|
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|
4488 // (Static) wrapper for getisax(2) call. |
|
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|
4489 os::Solaris::getisax_func_t os::Solaris::_getisax = 0; |
|
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|
4490 |
| 0 | 4491 // (Static) wrappers for the liblgrp API |
| 4492 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; | |
| 4493 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; | |
| 4494 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; | |
| 4495 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; | |
| 4496 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; | |
|
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|
4497 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; |
| 0 | 4498 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; |
| 4499 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; | |
| 4500 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; | |
| 4501 | |
| 4502 // (Static) wrapper for meminfo() call. | |
| 4503 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; | |
| 4504 | |
|
641
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|
4505 static address resolve_symbol_lazy(const char* name) { |
|
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|
4506 address addr = (address) dlsym(RTLD_DEFAULT, name); |
| 0 | 4507 if(addr == NULL) { |
| 4508 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 | |
| 4509 addr = (address) dlsym(RTLD_NEXT, name); | |
|
641
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|
4510 } |
|
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|
4511 return addr; |
|
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548
diff
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|
4512 } |
|
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|
4513 |
|
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|
4514 static address resolve_symbol(const char* name) { |
|
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|
4515 address addr = resolve_symbol_lazy(name); |
|
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|
4516 if(addr == NULL) { |
|
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|
4517 fatal(dlerror()); |
| 0 | 4518 } |
| 4519 return addr; | |
| 4520 } | |
| 4521 | |
| 4522 | |
| 4523 | |
| 4524 // isT2_libthread() | |
| 4525 // | |
| 4526 // Routine to determine if we are currently using the new T2 libthread. | |
| 4527 // | |
| 4528 // We determine if we are using T2 by reading /proc/self/lstatus and | |
| 4529 // looking for a thread with the ASLWP bit set. If we find this status | |
| 4530 // bit set, we must assume that we are NOT using T2. The T2 team | |
| 4531 // has approved this algorithm. | |
| 4532 // | |
| 4533 // We need to determine if we are running with the new T2 libthread | |
| 4534 // since setting native thread priorities is handled differently | |
| 4535 // when using this library. All threads created using T2 are bound | |
| 4536 // threads. Calling thr_setprio is meaningless in this case. | |
| 4537 // | |
| 4538 bool isT2_libthread() { | |
| 4539 static prheader_t * lwpArray = NULL; | |
| 4540 static int lwpSize = 0; | |
| 4541 static int lwpFile = -1; | |
| 4542 lwpstatus_t * that; | |
| 4543 char lwpName [128]; | |
| 4544 bool isT2 = false; | |
| 4545 | |
| 4546 #define ADR(x) ((uintptr_t)(x)) | |
| 4547 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) | |
| 4548 | |
|
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|
4549 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); |
|
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|
4550 if (lwpFile < 0) { |
|
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|
4551 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); |
|
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|
4552 return false; |
|
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diff
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|
4553 } |
| 0 | 4554 lwpSize = 16*1024; |
| 4555 for (;;) { | |
| 4556 lseek (lwpFile, 0, SEEK_SET); | |
|
89
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79
diff
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|
4557 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); |
|
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diff
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|
4558 if (read(lwpFile, lwpArray, lwpSize) < 0) { |
|
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|
4559 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); |
| 0 | 4560 break; |
| 4561 } | |
|
89
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|
4562 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { |
|
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diff
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|
4563 // We got a good snapshot - now iterate over the list. |
|
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diff
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|
4564 int aslwpcount = 0; |
|
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diff
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|
4565 for (int i = 0; i < lwpArray->pr_nent; i++ ) { |
|
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|
4566 that = LWPINDEX(lwpArray,i); |
|
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diff
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|
4567 if (that->pr_flags & PR_ASLWP) { |
|
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|
4568 aslwpcount++; |
|
b97de546208e
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diff
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|
4569 } |
|
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diff
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|
4570 } |
|
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diff
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|
4571 if (aslwpcount == 0) isT2 = true; |
|
b97de546208e
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diff
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|
4572 break; |
| 0 | 4573 } |
|
89
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diff
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|
4574 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; |
|
b97de546208e
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79
diff
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|
4575 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. |
|
b97de546208e
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diff
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|
4576 } |
| 0 | 4577 |
| 4578 FREE_C_HEAP_ARRAY(char, lwpArray); | |
| 4579 close (lwpFile); | |
|
89
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|
4580 if (ThreadPriorityVerbose) { |
|
b97de546208e
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diff
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|
4581 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); |
| 0 | 4582 else tty->print_cr("We are not running with a T2 libthread\n"); |
| 4583 } | |
|
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|
4584 return isT2; |
| 0 | 4585 } |
| 4586 | |
| 4587 | |
| 4588 void os::Solaris::libthread_init() { | |
| 4589 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); | |
| 4590 | |
| 4591 // Determine if we are running with the new T2 libthread | |
| 4592 os::Solaris::set_T2_libthread(isT2_libthread()); | |
| 4593 | |
| 4594 lwp_priocntl_init(); | |
| 4595 | |
| 4596 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 | |
| 4597 if(func == NULL) { | |
| 4598 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); | |
| 4599 // Guarantee that this VM is running on an new enough OS (5.6 or | |
| 4600 // later) that it will have a new enough libthread.so. | |
| 4601 guarantee(func != NULL, "libthread.so is too old."); | |
| 4602 } | |
| 4603 | |
| 4604 // Initialize the new libthread getstate API wrappers | |
| 4605 func = resolve_symbol("thr_getstate"); | |
| 4606 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); | |
| 4607 | |
| 4608 func = resolve_symbol("thr_setstate"); | |
| 4609 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); | |
| 4610 | |
| 4611 func = resolve_symbol("thr_setmutator"); | |
| 4612 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); | |
| 4613 | |
| 4614 func = resolve_symbol("thr_suspend_mutator"); | |
| 4615 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); | |
| 4616 | |
| 4617 func = resolve_symbol("thr_continue_mutator"); | |
| 4618 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); | |
| 4619 | |
| 4620 int size; | |
| 4621 void (*handler_info_func)(address *, int *); | |
| 4622 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); | |
| 4623 handler_info_func(&handler_start, &size); | |
| 4624 handler_end = handler_start + size; | |
| 4625 } | |
| 4626 | |
| 4627 | |
| 4628 int_fnP_mutex_tP os::Solaris::_mutex_lock; | |
| 4629 int_fnP_mutex_tP os::Solaris::_mutex_trylock; | |
| 4630 int_fnP_mutex_tP os::Solaris::_mutex_unlock; | |
| 4631 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; | |
| 4632 int_fnP_mutex_tP os::Solaris::_mutex_destroy; | |
| 4633 int os::Solaris::_mutex_scope = USYNC_THREAD; | |
| 4634 | |
| 4635 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; | |
| 4636 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; | |
| 4637 int_fnP_cond_tP os::Solaris::_cond_signal; | |
| 4638 int_fnP_cond_tP os::Solaris::_cond_broadcast; | |
| 4639 int_fnP_cond_tP_i_vP os::Solaris::_cond_init; | |
| 4640 int_fnP_cond_tP os::Solaris::_cond_destroy; | |
| 4641 int os::Solaris::_cond_scope = USYNC_THREAD; | |
| 4642 | |
| 4643 void os::Solaris::synchronization_init() { | |
| 4644 if(UseLWPSynchronization) { | |
| 4645 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); | |
| 4646 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); | |
| 4647 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); | |
| 4648 os::Solaris::set_mutex_init(lwp_mutex_init); | |
| 4649 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); | |
| 4650 os::Solaris::set_mutex_scope(USYNC_THREAD); | |
| 4651 | |
| 4652 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); | |
| 4653 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); | |
| 4654 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); | |
| 4655 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); | |
| 4656 os::Solaris::set_cond_init(lwp_cond_init); | |
| 4657 os::Solaris::set_cond_destroy(lwp_cond_destroy); | |
| 4658 os::Solaris::set_cond_scope(USYNC_THREAD); | |
| 4659 } | |
| 4660 else { | |
| 4661 os::Solaris::set_mutex_scope(USYNC_THREAD); | |
| 4662 os::Solaris::set_cond_scope(USYNC_THREAD); | |
| 4663 | |
| 4664 if(UsePthreads) { | |
| 4665 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); | |
| 4666 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); | |
| 4667 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); | |
| 4668 os::Solaris::set_mutex_init(pthread_mutex_default_init); | |
| 4669 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); | |
| 4670 | |
| 4671 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); | |
| 4672 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); | |
| 4673 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); | |
| 4674 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); | |
| 4675 os::Solaris::set_cond_init(pthread_cond_default_init); | |
| 4676 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); | |
| 4677 } | |
| 4678 else { | |
| 4679 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); | |
| 4680 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); | |
| 4681 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); | |
| 4682 os::Solaris::set_mutex_init(::mutex_init); | |
| 4683 os::Solaris::set_mutex_destroy(::mutex_destroy); | |
| 4684 | |
| 4685 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); | |
| 4686 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); | |
| 4687 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); | |
| 4688 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); | |
| 4689 os::Solaris::set_cond_init(::cond_init); | |
| 4690 os::Solaris::set_cond_destroy(::cond_destroy); | |
| 4691 } | |
| 4692 } | |
| 4693 } | |
| 4694 | |
|
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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439
diff
changeset
|
4695 bool os::Solaris::liblgrp_init() { |
|
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144
diff
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|
4696 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); |
| 0 | 4697 if (handle != NULL) { |
| 4698 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); | |
| 4699 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); | |
| 4700 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); | |
| 4701 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); | |
| 4702 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); | |
|
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|
4703 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); |
| 0 | 4704 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); |
| 4705 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, | |
| 4706 dlsym(handle, "lgrp_cookie_stale"))); | |
| 4707 | |
| 4708 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); | |
| 4709 set_lgrp_cookie(c); | |
|
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4710 return true; |
|
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4711 } |
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|
4712 return false; |
| 0 | 4713 } |
| 4714 | |
| 4715 void os::Solaris::misc_sym_init() { | |
|
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|
4716 address func; |
|
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|
4717 |
|
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|
4718 // getisax |
|
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|
4719 func = resolve_symbol_lazy("getisax"); |
|
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|
4720 if (func != NULL) { |
|
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|
4721 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); |
|
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|
4722 } |
|
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|
4723 |
|
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|
4724 // meminfo |
|
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|
4725 func = resolve_symbol_lazy("meminfo"); |
| 0 | 4726 if (func != NULL) { |
| 4727 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); | |
| 4728 } | |
| 4729 } | |
| 4730 | |
|
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|
4731 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { |
|
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4732 assert(_getisax != NULL, "_getisax not set"); |
|
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4733 return _getisax(array, n); |
|
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|
4734 } |
|
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|
4735 |
| 0 | 4736 // Symbol doesn't exist in Solaris 8 pset.h |
| 4737 #ifndef PS_MYID | |
| 4738 #define PS_MYID -3 | |
| 4739 #endif | |
| 4740 | |
| 4741 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); | |
| 4742 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); | |
| 4743 static pset_getloadavg_type pset_getloadavg_ptr = NULL; | |
| 4744 | |
| 4745 void init_pset_getloadavg_ptr(void) { | |
| 4746 pset_getloadavg_ptr = | |
| 4747 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); | |
| 4748 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { | |
| 4749 warning("pset_getloadavg function not found"); | |
| 4750 } | |
| 4751 } | |
| 4752 | |
| 4753 int os::Solaris::_dev_zero_fd = -1; | |
| 4754 | |
| 4755 // this is called _before_ the global arguments have been parsed | |
| 4756 void os::init(void) { | |
| 4757 _initial_pid = getpid(); | |
| 4758 | |
| 4759 max_hrtime = first_hrtime = gethrtime(); | |
| 4760 | |
| 4761 init_random(1234567); | |
| 4762 | |
| 4763 page_size = sysconf(_SC_PAGESIZE); | |
| 4764 if (page_size == -1) | |
| 4765 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); | |
| 4766 init_page_sizes((size_t) page_size); | |
| 4767 | |
| 4768 Solaris::initialize_system_info(); | |
| 4769 | |
|
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|
4770 // Initialize misc. symbols as soon as possible, so we can use them |
|
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|
4771 // if we need them. |
|
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|
4772 Solaris::misc_sym_init(); |
|
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|
4773 |
| 0 | 4774 int fd = open("/dev/zero", O_RDWR); |
| 4775 if (fd < 0) { | |
| 4776 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); | |
| 4777 } else { | |
| 4778 Solaris::set_dev_zero_fd(fd); | |
| 4779 | |
| 4780 // Close on exec, child won't inherit. | |
| 4781 fcntl(fd, F_SETFD, FD_CLOEXEC); | |
| 4782 } | |
| 4783 | |
| 4784 clock_tics_per_sec = CLK_TCK; | |
| 4785 | |
| 4786 // check if dladdr1() exists; dladdr1 can provide more information than | |
| 4787 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 | |
| 4788 // and is available on linker patches for 5.7 and 5.8. | |
| 4789 // libdl.so must have been loaded, this call is just an entry lookup | |
| 4790 void * hdl = dlopen("libdl.so", RTLD_NOW); | |
| 4791 if (hdl) | |
| 4792 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); | |
| 4793 | |
| 4794 // (Solaris only) this switches to calls that actually do locking. | |
| 4795 ThreadCritical::initialize(); | |
| 4796 | |
| 4797 main_thread = thr_self(); | |
| 4798 | |
| 4799 // Constant minimum stack size allowed. It must be at least | |
| 4800 // the minimum of what the OS supports (thr_min_stack()), and | |
| 4801 // enough to allow the thread to get to user bytecode execution. | |
| 4802 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); | |
| 4803 // If the pagesize of the VM is greater than 8K determine the appropriate | |
| 4804 // number of initial guard pages. The user can change this with the | |
| 4805 // command line arguments, if needed. | |
| 4806 if (vm_page_size() > 8*K) { | |
| 4807 StackYellowPages = 1; | |
| 4808 StackRedPages = 1; | |
| 4809 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); | |
| 4810 } | |
| 4811 } | |
| 4812 | |
| 4813 // To install functions for atexit system call | |
| 4814 extern "C" { | |
| 4815 static void perfMemory_exit_helper() { | |
| 4816 perfMemory_exit(); | |
| 4817 } | |
| 4818 } | |
| 4819 | |
| 4820 // this is called _after_ the global arguments have been parsed | |
| 4821 jint os::init_2(void) { | |
| 4822 // try to enable extended file IO ASAP, see 6431278 | |
| 4823 os::Solaris::try_enable_extended_io(); | |
| 4824 | |
| 4825 // Allocate a single page and mark it as readable for safepoint polling. Also | |
| 4826 // use this first mmap call to check support for MAP_ALIGN. | |
| 4827 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, | |
| 4828 page_size, | |
| 4829 MAP_PRIVATE | MAP_ALIGN, | |
| 4830 PROT_READ); | |
| 4831 if (polling_page == NULL) { | |
| 4832 has_map_align = false; | |
| 4833 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, | |
| 4834 PROT_READ); | |
| 4835 } | |
| 4836 | |
| 4837 os::set_polling_page(polling_page); | |
| 4838 | |
| 4839 #ifndef PRODUCT | |
| 4840 if( Verbose && PrintMiscellaneous ) | |
| 4841 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
| 4842 #endif | |
| 4843 | |
| 4844 if (!UseMembar) { | |
| 4845 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); | |
| 4846 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); | |
| 4847 os::set_memory_serialize_page( mem_serialize_page ); | |
| 4848 | |
| 4849 #ifndef PRODUCT | |
| 4850 if(Verbose && PrintMiscellaneous) | |
| 4851 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
| 4852 #endif | |
| 4853 } | |
| 4854 | |
| 4855 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); | |
| 4856 | |
| 4857 // Check minimum allowable stack size for thread creation and to initialize | |
| 4858 // the java system classes, including StackOverflowError - depends on page | |
| 4859 // size. Add a page for compiler2 recursion in main thread. | |
| 4860 // Add in BytesPerWord times page size to account for VM stack during | |
| 4861 // class initialization depending on 32 or 64 bit VM. | |
| 4862 guarantee((Solaris::min_stack_allowed >= | |
| 4863 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord | |
| 4864 COMPILER2_PRESENT(+1)) * page_size), | |
| 4865 "need to increase Solaris::min_stack_allowed on this platform"); | |
| 4866 | |
| 4867 size_t threadStackSizeInBytes = ThreadStackSize * K; | |
| 4868 if (threadStackSizeInBytes != 0 && | |
| 4869 threadStackSizeInBytes < Solaris::min_stack_allowed) { | |
| 4870 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", | |
| 4871 Solaris::min_stack_allowed/K); | |
| 4872 return JNI_ERR; | |
| 4873 } | |
| 4874 | |
| 4875 // For 64kbps there will be a 64kb page size, which makes | |
| 4876 // the usable default stack size quite a bit less. Increase the | |
| 4877 // stack for 64kb (or any > than 8kb) pages, this increases | |
| 4878 // virtual memory fragmentation (since we're not creating the | |
| 4879 // stack on a power of 2 boundary. The real fix for this | |
| 4880 // should be to fix the guard page mechanism. | |
| 4881 | |
| 4882 if (vm_page_size() > 8*K) { | |
| 4883 threadStackSizeInBytes = (threadStackSizeInBytes != 0) | |
| 4884 ? threadStackSizeInBytes + | |
| 4885 ((StackYellowPages + StackRedPages) * vm_page_size()) | |
| 4886 : 0; | |
| 4887 ThreadStackSize = threadStackSizeInBytes/K; | |
| 4888 } | |
| 4889 | |
| 4890 // Make the stack size a multiple of the page size so that | |
| 4891 // the yellow/red zones can be guarded. | |
| 4892 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
| 4893 vm_page_size())); | |
| 4894 | |
| 4895 Solaris::libthread_init(); | |
|
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4896 |
| 0 | 4897 if (UseNUMA) { |
|
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4898 if (!Solaris::liblgrp_init()) { |
|
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4899 UseNUMA = false; |
|
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|
4900 } else { |
|
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|
4901 size_t lgrp_limit = os::numa_get_groups_num(); |
|
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|
4902 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit); |
|
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|
4903 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); |
|
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|
4904 FREE_C_HEAP_ARRAY(int, lgrp_ids); |
|
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|
4905 if (lgrp_num < 2) { |
|
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|
4906 // There's only one locality group, disable NUMA. |
|
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|
4907 UseNUMA = false; |
|
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|
4908 } |
|
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|
4909 } |
|
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|
4910 if (!UseNUMA && ForceNUMA) { |
|
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4911 UseNUMA = true; |
|
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4912 } |
|
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4913 } |
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4914 |
| 0 | 4915 Solaris::signal_sets_init(); |
| 4916 Solaris::init_signal_mem(); | |
| 4917 Solaris::install_signal_handlers(); | |
| 4918 | |
| 4919 if (libjsigversion < JSIG_VERSION_1_4_1) { | |
| 4920 Maxlibjsigsigs = OLDMAXSIGNUM; | |
| 4921 } | |
| 4922 | |
| 4923 // initialize synchronization primitives to use either thread or | |
| 4924 // lwp synchronization (controlled by UseLWPSynchronization) | |
| 4925 Solaris::synchronization_init(); | |
| 4926 | |
| 4927 if (MaxFDLimit) { | |
| 4928 // set the number of file descriptors to max. print out error | |
| 4929 // if getrlimit/setrlimit fails but continue regardless. | |
| 4930 struct rlimit nbr_files; | |
| 4931 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4932 if (status != 0) { | |
| 4933 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4934 perror("os::init_2 getrlimit failed"); | |
| 4935 } else { | |
| 4936 nbr_files.rlim_cur = nbr_files.rlim_max; | |
| 4937 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4938 if (status != 0) { | |
| 4939 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4940 perror("os::init_2 setrlimit failed"); | |
| 4941 } | |
| 4942 } | |
| 4943 } | |
| 4944 | |
| 4945 // Initialize HPI. | |
| 4946 jint hpi_result = hpi::initialize(); | |
| 4947 if (hpi_result != JNI_OK) { | |
| 4948 tty->print_cr("There was an error trying to initialize the HPI library."); | |
| 4949 return hpi_result; | |
| 4950 } | |
| 4951 | |
| 4952 // Calculate theoretical max. size of Threads to guard gainst | |
| 4953 // artifical out-of-memory situations, where all available address- | |
| 4954 // space has been reserved by thread stacks. Default stack size is 1Mb. | |
| 4955 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? | |
| 4956 JavaThread::stack_size_at_create() : (1*K*K); | |
| 4957 assert(pre_thread_stack_size != 0, "Must have a stack"); | |
| 4958 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when | |
| 4959 // we should start doing Virtual Memory banging. Currently when the threads will | |
| 4960 // have used all but 200Mb of space. | |
| 4961 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); | |
| 4962 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; | |
| 4963 | |
| 4964 // at-exit methods are called in the reverse order of their registration. | |
| 4965 // In Solaris 7 and earlier, atexit functions are called on return from | |
| 4966 // main or as a result of a call to exit(3C). There can be only 32 of | |
| 4967 // these functions registered and atexit() does not set errno. In Solaris | |
| 4968 // 8 and later, there is no limit to the number of functions registered | |
| 4969 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit | |
| 4970 // functions are called upon dlclose(3DL) in addition to return from main | |
| 4971 // and exit(3C). | |
| 4972 | |
| 4973 if (PerfAllowAtExitRegistration) { | |
| 4974 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
| 4975 // atexit functions can be delayed until process exit time, which | |
| 4976 // can be problematic for embedded VM situations. Embedded VMs should | |
| 4977 // call DestroyJavaVM() to assure that VM resources are released. | |
| 4978 | |
| 4979 // note: perfMemory_exit_helper atexit function may be removed in | |
| 4980 // the future if the appropriate cleanup code can be added to the | |
| 4981 // VM_Exit VMOperation's doit method. | |
| 4982 if (atexit(perfMemory_exit_helper) != 0) { | |
| 4983 warning("os::init2 atexit(perfMemory_exit_helper) failed"); | |
| 4984 } | |
| 4985 } | |
| 4986 | |
| 4987 // Init pset_loadavg function pointer | |
| 4988 init_pset_getloadavg_ptr(); | |
| 4989 | |
| 4990 return JNI_OK; | |
| 4991 } | |
| 4992 | |
| 4993 | |
| 4994 // Mark the polling page as unreadable | |
| 4995 void os::make_polling_page_unreadable(void) { | |
| 4996 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) | |
| 4997 fatal("Could not disable polling page"); | |
| 4998 }; | |
| 4999 | |
| 5000 // Mark the polling page as readable | |
| 5001 void os::make_polling_page_readable(void) { | |
| 5002 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) | |
| 5003 fatal("Could not enable polling page"); | |
| 5004 }; | |
| 5005 | |
| 5006 // OS interface. | |
| 5007 | |
| 5008 int os::stat(const char *path, struct stat *sbuf) { | |
| 5009 char pathbuf[MAX_PATH]; | |
| 5010 if (strlen(path) > MAX_PATH - 1) { | |
| 5011 errno = ENAMETOOLONG; | |
| 5012 return -1; | |
| 5013 } | |
| 5014 hpi::native_path(strcpy(pathbuf, path)); | |
| 5015 return ::stat(pathbuf, sbuf); | |
| 5016 } | |
| 5017 | |
| 5018 | |
| 5019 bool os::check_heap(bool force) { return true; } | |
| 5020 | |
| 5021 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); | |
| 5022 static vsnprintf_t sol_vsnprintf = NULL; | |
| 5023 | |
| 5024 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { | |
| 5025 if (!sol_vsnprintf) { | |
| 5026 //search for the named symbol in the objects that were loaded after libjvm | |
| 5027 void* where = RTLD_NEXT; | |
| 5028 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) | |
| 5029 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); | |
| 5030 if (!sol_vsnprintf){ | |
| 5031 //search for the named symbol in the objects that were loaded before libjvm | |
| 5032 where = RTLD_DEFAULT; | |
| 5033 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) | |
| 5034 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); | |
| 5035 assert(sol_vsnprintf != NULL, "vsnprintf not found"); | |
| 5036 } | |
| 5037 } | |
| 5038 return (*sol_vsnprintf)(buf, count, fmt, argptr); | |
| 5039 } | |
| 5040 | |
| 5041 | |
| 5042 // Is a (classpath) directory empty? | |
| 5043 bool os::dir_is_empty(const char* path) { | |
| 5044 DIR *dir = NULL; | |
| 5045 struct dirent *ptr; | |
| 5046 | |
| 5047 dir = opendir(path); | |
| 5048 if (dir == NULL) return true; | |
| 5049 | |
| 5050 /* Scan the directory */ | |
| 5051 bool result = true; | |
| 5052 char buf[sizeof(struct dirent) + MAX_PATH]; | |
| 5053 struct dirent *dbuf = (struct dirent *) buf; | |
| 5054 while (result && (ptr = readdir(dir, dbuf)) != NULL) { | |
| 5055 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
| 5056 result = false; | |
| 5057 } | |
| 5058 } | |
| 5059 closedir(dir); | |
| 5060 return result; | |
| 5061 } | |
| 5062 | |
| 5063 // create binary file, rewriting existing file if required | |
| 5064 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
| 5065 int oflags = O_WRONLY | O_CREAT; | |
| 5066 if (!rewrite_existing) { | |
| 5067 oflags |= O_EXCL; | |
| 5068 } | |
| 5069 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
| 5070 } | |
| 5071 | |
| 5072 // return current position of file pointer | |
| 5073 jlong os::current_file_offset(int fd) { | |
| 5074 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
| 5075 } | |
| 5076 | |
| 5077 // move file pointer to the specified offset | |
| 5078 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
| 5079 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
| 5080 } | |
| 5081 | |
| 5082 // Map a block of memory. | |
| 5083 char* os::map_memory(int fd, const char* file_name, size_t file_offset, | |
| 5084 char *addr, size_t bytes, bool read_only, | |
| 5085 bool allow_exec) { | |
| 5086 int prot; | |
| 5087 int flags; | |
| 5088 | |
| 5089 if (read_only) { | |
| 5090 prot = PROT_READ; | |
| 5091 flags = MAP_SHARED; | |
| 5092 } else { | |
| 5093 prot = PROT_READ | PROT_WRITE; | |
| 5094 flags = MAP_PRIVATE; | |
| 5095 } | |
| 5096 | |
| 5097 if (allow_exec) { | |
| 5098 prot |= PROT_EXEC; | |
| 5099 } | |
| 5100 | |
| 5101 if (addr != NULL) { | |
| 5102 flags |= MAP_FIXED; | |
| 5103 } | |
| 5104 | |
| 5105 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
| 5106 fd, file_offset); | |
| 5107 if (mapped_address == MAP_FAILED) { | |
| 5108 return NULL; | |
| 5109 } | |
| 5110 return mapped_address; | |
| 5111 } | |
| 5112 | |
| 5113 | |
| 5114 // Remap a block of memory. | |
| 5115 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, | |
| 5116 char *addr, size_t bytes, bool read_only, | |
| 5117 bool allow_exec) { | |
| 5118 // same as map_memory() on this OS | |
| 5119 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
| 5120 allow_exec); | |
| 5121 } | |
| 5122 | |
| 5123 | |
| 5124 // Unmap a block of memory. | |
| 5125 bool os::unmap_memory(char* addr, size_t bytes) { | |
| 5126 return munmap(addr, bytes) == 0; | |
| 5127 } | |
| 5128 | |
| 5129 void os::pause() { | |
| 5130 char filename[MAX_PATH]; | |
| 5131 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
| 5132 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
| 5133 } else { | |
| 5134 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
| 5135 } | |
| 5136 | |
| 5137 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
| 5138 if (fd != -1) { | |
| 5139 struct stat buf; | |
| 5140 close(fd); | |
| 5141 while (::stat(filename, &buf) == 0) { | |
| 5142 (void)::poll(NULL, 0, 100); | |
| 5143 } | |
| 5144 } else { | |
| 5145 jio_fprintf(stderr, | |
| 5146 "Could not open pause file '%s', continuing immediately.\n", filename); | |
| 5147 } | |
| 5148 } | |
| 5149 | |
| 5150 #ifndef PRODUCT | |
| 5151 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS | |
| 5152 // Turn this on if you need to trace synch operations. | |
| 5153 // Set RECORD_SYNCH_LIMIT to a large-enough value, | |
| 5154 // and call record_synch_enable and record_synch_disable | |
| 5155 // around the computation of interest. | |
| 5156 | |
| 5157 void record_synch(char* name, bool returning); // defined below | |
| 5158 | |
| 5159 class RecordSynch { | |
| 5160 char* _name; | |
| 5161 public: | |
| 5162 RecordSynch(char* name) :_name(name) | |
| 5163 { record_synch(_name, false); } | |
| 5164 ~RecordSynch() { record_synch(_name, true); } | |
| 5165 }; | |
| 5166 | |
| 5167 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \ | |
| 5168 extern "C" ret name params { \ | |
| 5169 typedef ret name##_t params; \ | |
| 5170 static name##_t* implem = NULL; \ | |
| 5171 static int callcount = 0; \ | |
| 5172 if (implem == NULL) { \ | |
| 5173 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ | |
| 5174 if (implem == NULL) fatal(dlerror()); \ | |
| 5175 } \ | |
| 5176 ++callcount; \ | |
| 5177 RecordSynch _rs(#name); \ | |
| 5178 inner; \ | |
| 5179 return implem args; \ | |
| 5180 } | |
| 5181 // in dbx, examine callcounts this way: | |
| 5182 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done | |
| 5183 | |
| 5184 #define CHECK_POINTER_OK(p) \ | |
| 5185 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) | |
| 5186 #define CHECK_MU \ | |
| 5187 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); | |
| 5188 #define CHECK_CV \ | |
| 5189 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); | |
| 5190 #define CHECK_P(p) \ | |
| 5191 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); | |
| 5192 | |
| 5193 #define CHECK_MUTEX(mutex_op) \ | |
| 5194 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); | |
| 5195 | |
| 5196 CHECK_MUTEX( mutex_lock) | |
| 5197 CHECK_MUTEX( _mutex_lock) | |
| 5198 CHECK_MUTEX( mutex_unlock) | |
| 5199 CHECK_MUTEX(_mutex_unlock) | |
| 5200 CHECK_MUTEX( mutex_trylock) | |
| 5201 CHECK_MUTEX(_mutex_trylock) | |
| 5202 | |
| 5203 #define CHECK_COND(cond_op) \ | |
| 5204 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); | |
| 5205 | |
| 5206 CHECK_COND( cond_wait); | |
| 5207 CHECK_COND(_cond_wait); | |
| 5208 CHECK_COND(_cond_wait_cancel); | |
| 5209 | |
| 5210 #define CHECK_COND2(cond_op) \ | |
| 5211 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); | |
| 5212 | |
| 5213 CHECK_COND2( cond_timedwait); | |
| 5214 CHECK_COND2(_cond_timedwait); | |
| 5215 CHECK_COND2(_cond_timedwait_cancel); | |
| 5216 | |
| 5217 // do the _lwp_* versions too | |
| 5218 #define mutex_t lwp_mutex_t | |
| 5219 #define cond_t lwp_cond_t | |
| 5220 CHECK_MUTEX( _lwp_mutex_lock) | |
| 5221 CHECK_MUTEX( _lwp_mutex_unlock) | |
| 5222 CHECK_MUTEX( _lwp_mutex_trylock) | |
| 5223 CHECK_MUTEX( __lwp_mutex_lock) | |
| 5224 CHECK_MUTEX( __lwp_mutex_unlock) | |
| 5225 CHECK_MUTEX( __lwp_mutex_trylock) | |
| 5226 CHECK_MUTEX(___lwp_mutex_lock) | |
| 5227 CHECK_MUTEX(___lwp_mutex_unlock) | |
| 5228 | |
| 5229 CHECK_COND( _lwp_cond_wait); | |
| 5230 CHECK_COND( __lwp_cond_wait); | |
| 5231 CHECK_COND(___lwp_cond_wait); | |
| 5232 | |
| 5233 CHECK_COND2( _lwp_cond_timedwait); | |
| 5234 CHECK_COND2( __lwp_cond_timedwait); | |
| 5235 #undef mutex_t | |
| 5236 #undef cond_t | |
| 5237 | |
| 5238 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); | |
| 5239 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); | |
| 5240 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); | |
| 5241 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); | |
| 5242 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); | |
| 5243 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); | |
| 5244 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); | |
| 5245 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); | |
| 5246 | |
| 5247 | |
| 5248 // recording machinery: | |
| 5249 | |
| 5250 enum { RECORD_SYNCH_LIMIT = 200 }; | |
| 5251 char* record_synch_name[RECORD_SYNCH_LIMIT]; | |
| 5252 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; | |
| 5253 bool record_synch_returning[RECORD_SYNCH_LIMIT]; | |
| 5254 thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; | |
| 5255 int record_synch_count = 0; | |
| 5256 bool record_synch_enabled = false; | |
| 5257 | |
| 5258 // in dbx, examine recorded data this way: | |
| 5259 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done | |
| 5260 | |
| 5261 void record_synch(char* name, bool returning) { | |
| 5262 if (record_synch_enabled) { | |
| 5263 if (record_synch_count < RECORD_SYNCH_LIMIT) { | |
| 5264 record_synch_name[record_synch_count] = name; | |
| 5265 record_synch_returning[record_synch_count] = returning; | |
| 5266 record_synch_thread[record_synch_count] = thr_self(); | |
| 5267 record_synch_arg0ptr[record_synch_count] = &name; | |
| 5268 record_synch_count++; | |
| 5269 } | |
| 5270 // put more checking code here: | |
| 5271 // ... | |
| 5272 } | |
| 5273 } | |
| 5274 | |
| 5275 void record_synch_enable() { | |
| 5276 // start collecting trace data, if not already doing so | |
| 5277 if (!record_synch_enabled) record_synch_count = 0; | |
| 5278 record_synch_enabled = true; | |
| 5279 } | |
| 5280 | |
| 5281 void record_synch_disable() { | |
| 5282 // stop collecting trace data | |
| 5283 record_synch_enabled = false; | |
| 5284 } | |
| 5285 | |
| 5286 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS | |
| 5287 #endif // PRODUCT | |
| 5288 | |
| 5289 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); | |
| 5290 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - | |
| 5291 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); | |
| 5292 | |
| 5293 | |
| 5294 // JVMTI & JVM monitoring and management support | |
| 5295 // The thread_cpu_time() and current_thread_cpu_time() are only | |
| 5296 // supported if is_thread_cpu_time_supported() returns true. | |
| 5297 // They are not supported on Solaris T1. | |
| 5298 | |
| 5299 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
| 5300 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
| 5301 // of a thread. | |
| 5302 // | |
| 5303 // current_thread_cpu_time() and thread_cpu_time(Thread *) | |
| 5304 // returns the fast estimate available on the platform. | |
| 5305 | |
| 5306 // hrtime_t gethrvtime() return value includes | |
| 5307 // user time but does not include system time | |
| 5308 jlong os::current_thread_cpu_time() { | |
| 5309 return (jlong) gethrvtime(); | |
| 5310 } | |
| 5311 | |
| 5312 jlong os::thread_cpu_time(Thread *thread) { | |
| 5313 // return user level CPU time only to be consistent with | |
| 5314 // what current_thread_cpu_time returns. | |
| 5315 // thread_cpu_time_info() must be changed if this changes | |
| 5316 return os::thread_cpu_time(thread, false /* user time only */); | |
| 5317 } | |
| 5318 | |
| 5319 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
| 5320 if (user_sys_cpu_time) { | |
| 5321 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
| 5322 } else { | |
| 5323 return os::current_thread_cpu_time(); | |
| 5324 } | |
| 5325 } | |
| 5326 | |
| 5327 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 5328 char proc_name[64]; | |
| 5329 int count; | |
| 5330 prusage_t prusage; | |
| 5331 jlong lwp_time; | |
| 5332 int fd; | |
| 5333 | |
| 5334 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", | |
| 5335 getpid(), | |
| 5336 thread->osthread()->lwp_id()); | |
| 5337 fd = open(proc_name, O_RDONLY); | |
| 5338 if ( fd == -1 ) return -1; | |
| 5339 | |
| 5340 do { | |
| 5341 count = pread(fd, | |
| 5342 (void *)&prusage.pr_utime, | |
| 5343 thr_time_size, | |
| 5344 thr_time_off); | |
| 5345 } while (count < 0 && errno == EINTR); | |
| 5346 close(fd); | |
| 5347 if ( count < 0 ) return -1; | |
| 5348 | |
| 5349 if (user_sys_cpu_time) { | |
| 5350 // user + system CPU time | |
| 5351 lwp_time = (((jlong)prusage.pr_stime.tv_sec + | |
| 5352 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + | |
| 5353 (jlong)prusage.pr_stime.tv_nsec + | |
| 5354 (jlong)prusage.pr_utime.tv_nsec; | |
| 5355 } else { | |
| 5356 // user level CPU time only | |
| 5357 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + | |
| 5358 (jlong)prusage.pr_utime.tv_nsec; | |
| 5359 } | |
| 5360 | |
| 5361 return(lwp_time); | |
| 5362 } | |
| 5363 | |
| 5364 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5365 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5366 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5367 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5368 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned | |
| 5369 } | |
| 5370 | |
| 5371 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5372 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5373 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5374 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5375 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned | |
| 5376 } | |
| 5377 | |
| 5378 bool os::is_thread_cpu_time_supported() { | |
| 5379 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { | |
| 5380 return true; | |
| 5381 } else { | |
| 5382 return false; | |
| 5383 } | |
| 5384 } | |
| 5385 | |
| 5386 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 5387 // Return the load average for our processor set if the primitive exists | |
| 5388 // (Solaris 9 and later). Otherwise just return system wide loadavg. | |
| 5389 int os::loadavg(double loadavg[], int nelem) { | |
| 5390 if (pset_getloadavg_ptr != NULL) { | |
| 5391 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); | |
| 5392 } else { | |
| 5393 return ::getloadavg(loadavg, nelem); | |
| 5394 } | |
| 5395 } | |
| 5396 | |
| 5397 //--------------------------------------------------------------------------------- | |
| 5398 #ifndef PRODUCT | |
| 5399 | |
| 5400 static address same_page(address x, address y) { | |
| 5401 intptr_t page_bits = -os::vm_page_size(); | |
| 5402 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) | |
| 5403 return x; | |
| 5404 else if (x > y) | |
| 5405 return (address)(intptr_t(y) | ~page_bits) + 1; | |
| 5406 else | |
| 5407 return (address)(intptr_t(y) & page_bits); | |
| 5408 } | |
| 5409 | |
| 5410 bool os::find(address addr) { | |
| 5411 Dl_info dlinfo; | |
| 5412 memset(&dlinfo, 0, sizeof(dlinfo)); | |
| 5413 if (dladdr(addr, &dlinfo)) { | |
| 5414 #ifdef _LP64 | |
| 5415 tty->print("0x%016lx: ", addr); | |
| 5416 #else | |
| 5417 tty->print("0x%08x: ", addr); | |
| 5418 #endif | |
| 5419 if (dlinfo.dli_sname != NULL) | |
| 5420 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); | |
| 5421 else if (dlinfo.dli_fname) | |
| 5422 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); | |
| 5423 else | |
| 5424 tty->print("<absolute address>"); | |
| 5425 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); | |
| 5426 #ifdef _LP64 | |
| 5427 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); | |
| 5428 #else | |
| 5429 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); | |
| 5430 #endif | |
| 5431 tty->cr(); | |
| 5432 | |
| 5433 if (Verbose) { | |
| 5434 // decode some bytes around the PC | |
| 5435 address begin = same_page(addr-40, addr); | |
| 5436 address end = same_page(addr+40, addr); | |
| 5437 address lowest = (address) dlinfo.dli_sname; | |
| 5438 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
| 5439 if (begin < lowest) begin = lowest; | |
| 5440 Dl_info dlinfo2; | |
| 5441 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr | |
| 5442 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) | |
| 5443 end = (address) dlinfo2.dli_saddr; | |
| 5444 Disassembler::decode(begin, end); | |
| 5445 } | |
| 5446 return true; | |
| 5447 } | |
| 5448 return false; | |
| 5449 } | |
| 5450 | |
| 5451 #endif | |
| 5452 | |
| 5453 | |
| 5454 // Following function has been added to support HotSparc's libjvm.so running | |
| 5455 // under Solaris production JDK 1.2.2 / 1.3.0. These came from | |
| 5456 // src/solaris/hpi/native_threads in the EVM codebase. | |
| 5457 // | |
| 5458 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release | |
| 5459 // libraries and should thus be removed. We will leave it behind for a while | |
| 5460 // until we no longer want to able to run on top of 1.3.0 Solaris production | |
| 5461 // JDK. See 4341971. | |
| 5462 | |
| 5463 #define STACK_SLACK 0x800 | |
| 5464 | |
| 5465 extern "C" { | |
| 5466 intptr_t sysThreadAvailableStackWithSlack() { | |
| 5467 stack_t st; | |
| 5468 intptr_t retval, stack_top; | |
| 5469 retval = thr_stksegment(&st); | |
| 5470 assert(retval == 0, "incorrect return value from thr_stksegment"); | |
| 5471 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); | |
| 5472 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); | |
| 5473 stack_top=(intptr_t)st.ss_sp-st.ss_size; | |
| 5474 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); | |
| 5475 } | |
| 5476 } | |
| 5477 | |
| 5478 // Just to get the Kernel build to link on solaris for testing. | |
| 5479 | |
| 5480 extern "C" { | |
| 5481 class ASGCT_CallTrace; | |
| 5482 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) | |
| 5483 KERNEL_RETURN; | |
| 5484 } | |
| 5485 | |
| 5486 | |
| 5487 // ObjectMonitor park-unpark infrastructure ... | |
| 5488 // | |
| 5489 // We implement Solaris and Linux PlatformEvents with the | |
| 5490 // obvious condvar-mutex-flag triple. | |
| 5491 // Another alternative that works quite well is pipes: | |
| 5492 // Each PlatformEvent consists of a pipe-pair. | |
| 5493 // The thread associated with the PlatformEvent | |
| 5494 // calls park(), which reads from the input end of the pipe. | |
| 5495 // Unpark() writes into the other end of the pipe. | |
| 5496 // The write-side of the pipe must be set NDELAY. | |
| 5497 // Unfortunately pipes consume a large # of handles. | |
| 5498 // Native solaris lwp_park() and lwp_unpark() work nicely, too. | |
| 5499 // Using pipes for the 1st few threads might be workable, however. | |
| 5500 // | |
| 5501 // park() is permitted to return spuriously. | |
| 5502 // Callers of park() should wrap the call to park() in | |
| 5503 // an appropriate loop. A litmus test for the correct | |
| 5504 // usage of park is the following: if park() were modified | |
| 5505 // to immediately return 0 your code should still work, | |
| 5506 // albeit degenerating to a spin loop. | |
| 5507 // | |
| 5508 // An interesting optimization for park() is to use a trylock() | |
| 5509 // to attempt to acquire the mutex. If the trylock() fails | |
| 5510 // then we know that a concurrent unpark() operation is in-progress. | |
| 5511 // in that case the park() code could simply set _count to 0 | |
| 5512 // and return immediately. The subsequent park() operation *might* | |
| 5513 // return immediately. That's harmless as the caller of park() is | |
| 5514 // expected to loop. By using trylock() we will have avoided a | |
| 5515 // avoided a context switch caused by contention on the per-thread mutex. | |
| 5516 // | |
| 5517 // TODO-FIXME: | |
| 5518 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the | |
| 5519 // objectmonitor implementation. | |
| 5520 // 2. Collapse the JSR166 parker event, and the | |
| 5521 // objectmonitor ParkEvent into a single "Event" construct. | |
| 5522 // 3. In park() and unpark() add: | |
| 5523 // assert (Thread::current() == AssociatedWith). | |
| 5524 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. | |
| 5525 // 1-out-of-N park() operations will return immediately. | |
| 5526 // | |
| 5527 // _Event transitions in park() | |
| 5528 // -1 => -1 : illegal | |
| 5529 // 1 => 0 : pass - return immediately | |
| 5530 // 0 => -1 : block | |
| 5531 // | |
| 5532 // _Event serves as a restricted-range semaphore. | |
| 5533 // | |
| 5534 // Another possible encoding of _Event would be with | |
| 5535 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits. | |
| 5536 // | |
| 5537 // TODO-FIXME: add DTRACE probes for: | |
| 5538 // 1. Tx parks | |
| 5539 // 2. Ty unparks Tx | |
| 5540 // 3. Tx resumes from park | |
| 5541 | |
| 5542 | |
| 5543 // value determined through experimentation | |
| 5544 #define ROUNDINGFIX 11 | |
| 5545 | |
| 5546 // utility to compute the abstime argument to timedwait. | |
| 5547 // TODO-FIXME: switch from compute_abstime() to unpackTime(). | |
| 5548 | |
| 5549 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { | |
| 5550 // millis is the relative timeout time | |
| 5551 // abstime will be the absolute timeout time | |
| 5552 if (millis < 0) millis = 0; | |
| 5553 struct timeval now; | |
| 5554 int status = gettimeofday(&now, NULL); | |
| 5555 assert(status == 0, "gettimeofday"); | |
| 5556 jlong seconds = millis / 1000; | |
| 5557 jlong max_wait_period; | |
| 5558 | |
| 5559 if (UseLWPSynchronization) { | |
| 5560 // forward port of fix for 4275818 (not sleeping long enough) | |
| 5561 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where | |
| 5562 // _lwp_cond_timedwait() used a round_down algorithm rather | |
| 5563 // than a round_up. For millis less than our roundfactor | |
| 5564 // it rounded down to 0 which doesn't meet the spec. | |
| 5565 // For millis > roundfactor we may return a bit sooner, but | |
| 5566 // since we can not accurately identify the patch level and | |
| 5567 // this has already been fixed in Solaris 9 and 8 we will | |
| 5568 // leave it alone rather than always rounding down. | |
| 5569 | |
| 5570 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; | |
| 5571 // It appears that when we go directly through Solaris _lwp_cond_timedwait() | |
| 5572 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 | |
| 5573 max_wait_period = 21000000; | |
| 5574 } else { | |
| 5575 max_wait_period = 50000000; | |
| 5576 } | |
| 5577 millis %= 1000; | |
| 5578 if (seconds > max_wait_period) { // see man cond_timedwait(3T) | |
| 5579 seconds = max_wait_period; | |
| 5580 } | |
| 5581 abstime->tv_sec = now.tv_sec + seconds; | |
| 5582 long usec = now.tv_usec + millis * 1000; | |
| 5583 if (usec >= 1000000) { | |
| 5584 abstime->tv_sec += 1; | |
| 5585 usec -= 1000000; | |
| 5586 } | |
| 5587 abstime->tv_nsec = usec * 1000; | |
| 5588 return abstime; | |
| 5589 } | |
| 5590 | |
| 5591 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
| 5592 // Conceptually TryPark() should be equivalent to park(0). | |
| 5593 | |
| 5594 int os::PlatformEvent::TryPark() { | |
| 5595 for (;;) { | |
| 5596 const int v = _Event ; | |
| 5597 guarantee ((v == 0) || (v == 1), "invariant") ; | |
| 5598 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
| 5599 } | |
| 5600 } | |
| 5601 | |
| 5602 void os::PlatformEvent::park() { // AKA: down() | |
| 5603 // Invariant: Only the thread associated with the Event/PlatformEvent | |
| 5604 // may call park(). | |
| 5605 int v ; | |
| 5606 for (;;) { | |
| 5607 v = _Event ; | |
| 5608 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5609 } | |
| 5610 guarantee (v >= 0, "invariant") ; | |
| 5611 if (v == 0) { | |
| 5612 // Do this the hard way by blocking ... | |
| 5613 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
| 5614 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. | |
| 5615 // Only for SPARC >= V8PlusA | |
| 5616 #if defined(__sparc) && defined(COMPILER2) | |
| 5617 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
| 5618 #endif | |
| 5619 int status = os::Solaris::mutex_lock(_mutex); | |
| 5620 assert_status(status == 0, status, "mutex_lock"); | |
| 5621 guarantee (_nParked == 0, "invariant") ; | |
| 5622 ++ _nParked ; | |
| 5623 while (_Event < 0) { | |
| 5624 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
| 5625 // Treat this the same as if the wait was interrupted | |
| 5626 // With usr/lib/lwp going to kernel, always handle ETIME | |
| 5627 status = os::Solaris::cond_wait(_cond, _mutex); | |
| 5628 if (status == ETIME) status = EINTR ; | |
| 5629 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
| 5630 } | |
| 5631 -- _nParked ; | |
| 5632 _Event = 0 ; | |
| 5633 status = os::Solaris::mutex_unlock(_mutex); | |
| 5634 assert_status(status == 0, status, "mutex_unlock"); | |
| 5635 } | |
| 5636 } | |
| 5637 | |
| 5638 int os::PlatformEvent::park(jlong millis) { | |
| 5639 guarantee (_nParked == 0, "invariant") ; | |
| 5640 int v ; | |
| 5641 for (;;) { | |
| 5642 v = _Event ; | |
| 5643 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5644 } | |
| 5645 guarantee (v >= 0, "invariant") ; | |
| 5646 if (v != 0) return OS_OK ; | |
| 5647 | |
| 5648 int ret = OS_TIMEOUT; | |
| 5649 timestruc_t abst; | |
| 5650 compute_abstime (&abst, millis); | |
| 5651 | |
| 5652 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
| 5653 // For Solaris SPARC set fprs.FEF=0 prior to parking. | |
| 5654 // Only for SPARC >= V8PlusA | |
| 5655 #if defined(__sparc) && defined(COMPILER2) | |
| 5656 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
| 5657 #endif | |
| 5658 int status = os::Solaris::mutex_lock(_mutex); | |
| 5659 assert_status(status == 0, status, "mutex_lock"); | |
| 5660 guarantee (_nParked == 0, "invariant") ; | |
| 5661 ++ _nParked ; | |
| 5662 while (_Event < 0) { | |
| 5663 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); | |
| 5664 assert_status(status == 0 || status == EINTR || | |
| 5665 status == ETIME || status == ETIMEDOUT, | |
| 5666 status, "cond_timedwait"); | |
| 5667 if (!FilterSpuriousWakeups) break ; // previous semantics | |
| 5668 if (status == ETIME || status == ETIMEDOUT) break ; | |
| 5669 // We consume and ignore EINTR and spurious wakeups. | |
| 5670 } | |
| 5671 -- _nParked ; | |
| 5672 if (_Event >= 0) ret = OS_OK ; | |
| 5673 _Event = 0 ; | |
| 5674 status = os::Solaris::mutex_unlock(_mutex); | |
| 5675 assert_status(status == 0, status, "mutex_unlock"); | |
| 5676 return ret; | |
| 5677 } | |
| 5678 | |
| 5679 void os::PlatformEvent::unpark() { | |
| 5680 int v, AnyWaiters; | |
| 5681 | |
| 5682 // Increment _Event. | |
| 5683 // Another acceptable implementation would be to simply swap 1 | |
| 5684 // into _Event: | |
| 5685 // if (Swap (&_Event, 1) < 0) { | |
| 5686 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; | |
| 5687 // if (AnyWaiters) cond_signal (_cond) ; | |
| 5688 // } | |
| 5689 | |
| 5690 for (;;) { | |
| 5691 v = _Event ; | |
| 5692 if (v > 0) { | |
| 5693 // The LD of _Event could have reordered or be satisfied | |
| 5694 // by a read-aside from this processor's write buffer. | |
| 5695 // To avoid problems execute a barrier and then | |
| 5696 // ratify the value. A degenerate CAS() would also work. | |
| 5697 // Viz., CAS (v+0, &_Event, v) == v). | |
| 5698 OrderAccess::fence() ; | |
| 5699 if (_Event == v) return ; | |
| 5700 continue ; | |
| 5701 } | |
| 5702 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; | |
| 5703 } | |
| 5704 | |
| 5705 // If the thread associated with the event was parked, wake it. | |
| 5706 if (v < 0) { | |
| 5707 int status ; | |
| 5708 // Wait for the thread assoc with the PlatformEvent to vacate. | |
| 5709 status = os::Solaris::mutex_lock(_mutex); | |
| 5710 assert_status(status == 0, status, "mutex_lock"); | |
| 5711 AnyWaiters = _nParked ; | |
| 5712 status = os::Solaris::mutex_unlock(_mutex); | |
| 5713 assert_status(status == 0, status, "mutex_unlock"); | |
| 5714 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; | |
| 5715 if (AnyWaiters != 0) { | |
| 5716 // We intentional signal *after* dropping the lock | |
| 5717 // to avoid a common class of futile wakeups. | |
| 5718 status = os::Solaris::cond_signal(_cond); | |
| 5719 assert_status(status == 0, status, "cond_signal"); | |
| 5720 } | |
| 5721 } | |
| 5722 } | |
| 5723 | |
| 5724 // JSR166 | |
| 5725 // ------------------------------------------------------- | |
| 5726 | |
| 5727 /* | |
| 5728 * The solaris and linux implementations of park/unpark are fairly | |
| 5729 * conservative for now, but can be improved. They currently use a | |
| 5730 * mutex/condvar pair, plus _counter. | |
| 5731 * Park decrements _counter if > 0, else does a condvar wait. Unpark | |
| 5732 * sets count to 1 and signals condvar. Only one thread ever waits | |
| 5733 * on the condvar. Contention seen when trying to park implies that someone | |
| 5734 * is unparking you, so don't wait. And spurious returns are fine, so there | |
| 5735 * is no need to track notifications. | |
| 5736 */ | |
| 5737 | |
| 5738 #define NANOSECS_PER_SEC 1000000000 | |
| 5739 #define NANOSECS_PER_MILLISEC 1000000 | |
| 5740 #define MAX_SECS 100000000 | |
| 5741 | |
| 5742 /* | |
| 5743 * This code is common to linux and solaris and will be moved to a | |
| 5744 * common place in dolphin. | |
| 5745 * | |
| 5746 * The passed in time value is either a relative time in nanoseconds | |
| 5747 * or an absolute time in milliseconds. Either way it has to be unpacked | |
| 5748 * into suitable seconds and nanoseconds components and stored in the | |
| 5749 * given timespec structure. | |
| 5750 * Given time is a 64-bit value and the time_t used in the timespec is only | |
| 5751 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
| 5752 * overflow if times way in the future are given. Further on Solaris versions | |
| 5753 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
| 5754 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
| 5755 * As it will be 28 years before "now + 100000000" will overflow we can | |
| 5756 * ignore overflow and just impose a hard-limit on seconds using the value | |
| 5757 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
| 5758 * years from "now". | |
| 5759 */ | |
| 5760 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
| 5761 assert (time > 0, "convertTime"); | |
| 5762 | |
| 5763 struct timeval now; | |
| 5764 int status = gettimeofday(&now, NULL); | |
| 5765 assert(status == 0, "gettimeofday"); | |
| 5766 | |
| 5767 time_t max_secs = now.tv_sec + MAX_SECS; | |
| 5768 | |
| 5769 if (isAbsolute) { | |
| 5770 jlong secs = time / 1000; | |
| 5771 if (secs > max_secs) { | |
| 5772 absTime->tv_sec = max_secs; | |
| 5773 } | |
| 5774 else { | |
| 5775 absTime->tv_sec = secs; | |
| 5776 } | |
| 5777 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; | |
| 5778 } | |
| 5779 else { | |
| 5780 jlong secs = time / NANOSECS_PER_SEC; | |
| 5781 if (secs >= MAX_SECS) { | |
| 5782 absTime->tv_sec = max_secs; | |
| 5783 absTime->tv_nsec = 0; | |
| 5784 } | |
| 5785 else { | |
| 5786 absTime->tv_sec = now.tv_sec + secs; | |
| 5787 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; | |
| 5788 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { | |
| 5789 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
| 5790 ++absTime->tv_sec; // note: this must be <= max_secs | |
| 5791 } | |
| 5792 } | |
| 5793 } | |
| 5794 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
| 5795 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
| 5796 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
| 5797 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
| 5798 } | |
| 5799 | |
| 5800 void Parker::park(bool isAbsolute, jlong time) { | |
| 5801 | |
| 5802 // Optional fast-path check: | |
| 5803 // Return immediately if a permit is available. | |
| 5804 if (_counter > 0) { | |
| 5805 _counter = 0 ; | |
|
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|
5806 OrderAccess::fence(); |
| 0 | 5807 return ; |
| 5808 } | |
| 5809 | |
| 5810 // Optional fast-exit: Check interrupt before trying to wait | |
| 5811 Thread* thread = Thread::current(); | |
| 5812 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
| 5813 JavaThread *jt = (JavaThread *)thread; | |
| 5814 if (Thread::is_interrupted(thread, false)) { | |
| 5815 return; | |
| 5816 } | |
| 5817 | |
| 5818 // First, demultiplex/decode time arguments | |
| 5819 timespec absTime; | |
| 5820 if (time < 0) { // don't wait at all | |
| 5821 return; | |
| 5822 } | |
| 5823 if (time > 0) { | |
| 5824 // Warning: this code might be exposed to the old Solaris time | |
| 5825 // round-down bugs. Grep "roundingFix" for details. | |
| 5826 unpackTime(&absTime, isAbsolute, time); | |
| 5827 } | |
| 5828 | |
| 5829 // Enter safepoint region | |
| 5830 // Beware of deadlocks such as 6317397. | |
| 5831 // The per-thread Parker:: _mutex is a classic leaf-lock. | |
| 5832 // In particular a thread must never block on the Threads_lock while | |
| 5833 // holding the Parker:: mutex. If safepoints are pending both the | |
| 5834 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
| 5835 ThreadBlockInVM tbivm(jt); | |
| 5836 | |
| 5837 // Don't wait if cannot get lock since interference arises from | |
| 5838 // unblocking. Also. check interrupt before trying wait | |
| 5839 if (Thread::is_interrupted(thread, false) || | |
| 5840 os::Solaris::mutex_trylock(_mutex) != 0) { | |
| 5841 return; | |
| 5842 } | |
| 5843 | |
| 5844 int status ; | |
| 5845 | |
| 5846 if (_counter > 0) { // no wait needed | |
| 5847 _counter = 0; | |
| 5848 status = os::Solaris::mutex_unlock(_mutex); | |
| 5849 assert (status == 0, "invariant") ; | |
|
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diff
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|
5850 OrderAccess::fence(); |
| 0 | 5851 return; |
| 5852 } | |
| 5853 | |
| 5854 #ifdef ASSERT | |
| 5855 // Don't catch signals while blocked; let the running threads have the signals. | |
| 5856 // (This allows a debugger to break into the running thread.) | |
| 5857 sigset_t oldsigs; | |
| 5858 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); | |
| 5859 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
| 5860 #endif | |
| 5861 | |
| 5862 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 5863 jt->set_suspend_equivalent(); | |
| 5864 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 5865 | |
| 5866 // Do this the hard way by blocking ... | |
| 5867 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
| 5868 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. | |
| 5869 // Only for SPARC >= V8PlusA | |
| 5870 #if defined(__sparc) && defined(COMPILER2) | |
| 5871 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
| 5872 #endif | |
| 5873 | |
| 5874 if (time == 0) { | |
| 5875 status = os::Solaris::cond_wait (_cond, _mutex) ; | |
| 5876 } else { | |
| 5877 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); | |
| 5878 } | |
| 5879 // Note that an untimed cond_wait() can sometimes return ETIME on older | |
| 5880 // versions of the Solaris. | |
| 5881 assert_status(status == 0 || status == EINTR || | |
| 5882 status == ETIME || status == ETIMEDOUT, | |
| 5883 status, "cond_timedwait"); | |
| 5884 | |
| 5885 #ifdef ASSERT | |
| 5886 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); | |
| 5887 #endif | |
| 5888 _counter = 0 ; | |
| 5889 status = os::Solaris::mutex_unlock(_mutex); | |
| 5890 assert_status(status == 0, status, "mutex_unlock") ; | |
| 5891 | |
| 5892 // If externally suspended while waiting, re-suspend | |
| 5893 if (jt->handle_special_suspend_equivalent_condition()) { | |
| 5894 jt->java_suspend_self(); | |
| 5895 } | |
| 5896 | |
|
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894
diff
changeset
|
5897 OrderAccess::fence(); |
| 0 | 5898 } |
| 5899 | |
| 5900 void Parker::unpark() { | |
| 5901 int s, status ; | |
| 5902 status = os::Solaris::mutex_lock (_mutex) ; | |
| 5903 assert (status == 0, "invariant") ; | |
| 5904 s = _counter; | |
| 5905 _counter = 1; | |
| 5906 status = os::Solaris::mutex_unlock (_mutex) ; | |
| 5907 assert (status == 0, "invariant") ; | |
| 5908 | |
| 5909 if (s < 1) { | |
| 5910 status = os::Solaris::cond_signal (_cond) ; | |
| 5911 assert (status == 0, "invariant") ; | |
| 5912 } | |
| 5913 } | |
| 5914 | |
| 5915 extern char** environ; | |
| 5916 | |
| 5917 // Run the specified command in a separate process. Return its exit value, | |
| 5918 // or -1 on failure (e.g. can't fork a new process). | |
| 5919 // Unlike system(), this function can be called from signal handler. It | |
| 5920 // doesn't block SIGINT et al. | |
| 5921 int os::fork_and_exec(char* cmd) { | |
| 5922 char * argv[4]; | |
| 5923 argv[0] = (char *)"sh"; | |
| 5924 argv[1] = (char *)"-c"; | |
| 5925 argv[2] = cmd; | |
| 5926 argv[3] = NULL; | |
| 5927 | |
| 5928 // fork is async-safe, fork1 is not so can't use in signal handler | |
| 5929 pid_t pid; | |
| 5930 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 5931 if (t != NULL && t->is_inside_signal_handler()) { | |
| 5932 pid = fork(); | |
| 5933 } else { | |
| 5934 pid = fork1(); | |
| 5935 } | |
| 5936 | |
| 5937 if (pid < 0) { | |
| 5938 // fork failed | |
| 5939 warning("fork failed: %s", strerror(errno)); | |
| 5940 return -1; | |
| 5941 | |
| 5942 } else if (pid == 0) { | |
| 5943 // child process | |
| 5944 | |
| 5945 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris | |
| 5946 execve("/usr/bin/sh", argv, environ); | |
| 5947 | |
| 5948 // execve failed | |
| 5949 _exit(-1); | |
| 5950 | |
| 5951 } else { | |
| 5952 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
| 5953 // care about the actual exit code, for now. | |
| 5954 | |
| 5955 int status; | |
| 5956 | |
| 5957 // Wait for the child process to exit. This returns immediately if | |
| 5958 // the child has already exited. */ | |
| 5959 while (waitpid(pid, &status, 0) < 0) { | |
| 5960 switch (errno) { | |
| 5961 case ECHILD: return 0; | |
| 5962 case EINTR: break; | |
| 5963 default: return -1; | |
| 5964 } | |
| 5965 } | |
| 5966 | |
| 5967 if (WIFEXITED(status)) { | |
| 5968 // The child exited normally; get its exit code. | |
| 5969 return WEXITSTATUS(status); | |
| 5970 } else if (WIFSIGNALED(status)) { | |
| 5971 // The child exited because of a signal | |
| 5972 // The best value to return is 0x80 + signal number, | |
| 5973 // because that is what all Unix shells do, and because | |
| 5974 // it allows callers to distinguish between process exit and | |
| 5975 // process death by signal. | |
| 5976 return 0x80 + WTERMSIG(status); | |
| 5977 } else { | |
| 5978 // Unknown exit code; pass it through | |
| 5979 return status; | |
| 5980 } | |
| 5981 } | |
| 5982 } |