Mercurial > hg > truffle
annotate src/os/solaris/vm/os_solaris.cpp @ 462:85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
Summary: In os::Linux::rebuild_cpu_to_node_map() fix the size of the CPU bitmap. Fixed arithmetic in MutableNUMASpace::adaptive_chunk_size() that could cause overflows and underflows of the chunk_size variable.
Reviewed-by: apetrusenko
| author | iveresov |
|---|---|
| date | Wed, 03 Dec 2008 14:18:57 -0800 |
| parents | 03f4fdd1b6af |
| children | 24fda36852ce |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 1997-2008 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 | |
| 326 // interruptible infrastructure | |
| 327 | |
| 328 // setup_interruptible saves the thread state before going into an | |
| 329 // interruptible system call. | |
| 330 // The saved state is used to restore the thread to | |
| 331 // its former state whether or not an interrupt is received. | |
| 332 // Used by classloader os::read | |
| 333 // hpi calls skip this layer and stay in _thread_in_native | |
| 334 | |
| 335 void os::Solaris::setup_interruptible(JavaThread* thread) { | |
| 336 | |
| 337 JavaThreadState thread_state = thread->thread_state(); | |
| 338 | |
| 339 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); | |
| 340 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); | |
| 341 OSThread* osthread = thread->osthread(); | |
| 342 osthread->set_saved_interrupt_thread_state(thread_state); | |
| 343 thread->frame_anchor()->make_walkable(thread); | |
| 344 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); | |
| 345 } | |
| 346 | |
| 347 // Version of setup_interruptible() for threads that are already in | |
| 348 // _thread_blocked. Used by os_sleep(). | |
| 349 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { | |
| 350 thread->frame_anchor()->make_walkable(thread); | |
| 351 } | |
| 352 | |
| 353 JavaThread* os::Solaris::setup_interruptible() { | |
| 354 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); | |
| 355 setup_interruptible(thread); | |
| 356 return thread; | |
| 357 } | |
| 358 | |
| 359 void os::Solaris::try_enable_extended_io() { | |
| 360 typedef int (*enable_extended_FILE_stdio_t)(int, int); | |
| 361 | |
| 362 if (!UseExtendedFileIO) { | |
| 363 return; | |
| 364 } | |
| 365 | |
| 366 enable_extended_FILE_stdio_t enabler = | |
| 367 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, | |
| 368 "enable_extended_FILE_stdio"); | |
| 369 if (enabler) { | |
| 370 enabler(-1, -1); | |
| 371 } | |
| 372 } | |
| 373 | |
| 374 | |
| 375 #ifdef ASSERT | |
| 376 | |
| 377 JavaThread* os::Solaris::setup_interruptible_native() { | |
| 378 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); | |
| 379 JavaThreadState thread_state = thread->thread_state(); | |
| 380 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); | |
| 381 return thread; | |
| 382 } | |
| 383 | |
| 384 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { | |
| 385 JavaThreadState thread_state = thread->thread_state(); | |
| 386 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); | |
| 387 } | |
| 388 #endif | |
| 389 | |
| 390 // cleanup_interruptible reverses the effects of setup_interruptible | |
| 391 // setup_interruptible_already_blocked() does not need any cleanup. | |
| 392 | |
| 393 void os::Solaris::cleanup_interruptible(JavaThread* thread) { | |
| 394 OSThread* osthread = thread->osthread(); | |
| 395 | |
| 396 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); | |
| 397 } | |
| 398 | |
| 399 // I/O interruption related counters called in _INTERRUPTIBLE | |
| 400 | |
| 401 void os::Solaris::bump_interrupted_before_count() { | |
| 402 RuntimeService::record_interrupted_before_count(); | |
| 403 } | |
| 404 | |
| 405 void os::Solaris::bump_interrupted_during_count() { | |
| 406 RuntimeService::record_interrupted_during_count(); | |
| 407 } | |
| 408 | |
| 409 static int _processors_online = 0; | |
| 410 | |
| 411 jint os::Solaris::_os_thread_limit = 0; | |
| 412 volatile jint os::Solaris::_os_thread_count = 0; | |
| 413 | |
| 414 julong os::available_memory() { | |
| 415 return Solaris::available_memory(); | |
| 416 } | |
| 417 | |
| 418 julong os::Solaris::available_memory() { | |
| 419 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); | |
| 420 } | |
| 421 | |
| 422 julong os::Solaris::_physical_memory = 0; | |
| 423 | |
| 424 julong os::physical_memory() { | |
| 425 return Solaris::physical_memory(); | |
| 426 } | |
| 427 | |
| 428 julong os::allocatable_physical_memory(julong size) { | |
| 429 #ifdef _LP64 | |
| 430 return size; | |
| 431 #else | |
| 432 julong result = MIN2(size, (julong)3835*M); | |
| 433 if (!is_allocatable(result)) { | |
| 434 // Memory allocations will be aligned but the alignment | |
| 435 // is not known at this point. Alignments will | |
| 436 // be at most to LargePageSizeInBytes. Protect | |
| 437 // allocations from alignments up to illegal | |
| 438 // values. If at this point 2G is illegal. | |
| 439 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; | |
| 440 result = MIN2(size, reasonable_size); | |
| 441 } | |
| 442 return result; | |
| 443 #endif | |
| 444 } | |
| 445 | |
| 446 static hrtime_t first_hrtime = 0; | |
| 447 static const hrtime_t hrtime_hz = 1000*1000*1000; | |
| 448 const int LOCK_BUSY = 1; | |
| 449 const int LOCK_FREE = 0; | |
| 450 const int LOCK_INVALID = -1; | |
| 451 static volatile hrtime_t max_hrtime = 0; | |
| 452 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress | |
| 453 | |
| 454 | |
| 455 void os::Solaris::initialize_system_info() { | |
| 456 _processor_count = sysconf(_SC_NPROCESSORS_CONF); | |
| 457 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); | |
| 458 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); | |
| 459 } | |
| 460 | |
| 461 int os::active_processor_count() { | |
| 462 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); | |
| 463 pid_t pid = getpid(); | |
| 464 psetid_t pset = PS_NONE; | |
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465 // Are we running in a processor set or is there any processor set around? |
| 0 | 466 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { |
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467 uint_t pset_cpus; |
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468 // Query the number of cpus available to us. |
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469 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { |
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470 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); |
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471 _processors_online = pset_cpus; |
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472 return pset_cpus; |
| 0 | 473 } |
| 474 } | |
| 475 // Otherwise return number of online cpus | |
| 476 return online_cpus; | |
| 477 } | |
| 478 | |
| 479 static bool find_processors_in_pset(psetid_t pset, | |
| 480 processorid_t** id_array, | |
| 481 uint_t* id_length) { | |
| 482 bool result = false; | |
| 483 // Find the number of processors in the processor set. | |
| 484 if (pset_info(pset, NULL, id_length, NULL) == 0) { | |
| 485 // Make up an array to hold their ids. | |
| 486 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); | |
| 487 // Fill in the array with their processor ids. | |
| 488 if (pset_info(pset, NULL, id_length, *id_array) == 0) { | |
| 489 result = true; | |
| 490 } | |
| 491 } | |
| 492 return result; | |
| 493 } | |
| 494 | |
| 495 // Callers of find_processors_online() must tolerate imprecise results -- | |
| 496 // the system configuration can change asynchronously because of DR | |
| 497 // or explicit psradm operations. | |
| 498 // | |
| 499 // We also need to take care that the loop (below) terminates as the | |
| 500 // number of processors online can change between the _SC_NPROCESSORS_ONLN | |
| 501 // request and the loop that builds the list of processor ids. Unfortunately | |
| 502 // there's no reliable way to determine the maximum valid processor id, | |
| 503 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online | |
| 504 // man pages, which claim the processor id set is "sparse, but | |
| 505 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually | |
| 506 // exit the loop. | |
| 507 // | |
| 508 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's | |
| 509 // not available on S8.0. | |
| 510 | |
| 511 static bool find_processors_online(processorid_t** id_array, | |
| 512 uint* id_length) { | |
| 513 const processorid_t MAX_PROCESSOR_ID = 100000 ; | |
| 514 // Find the number of processors online. | |
| 515 *id_length = sysconf(_SC_NPROCESSORS_ONLN); | |
| 516 // Make up an array to hold their ids. | |
| 517 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); | |
| 518 // Processors need not be numbered consecutively. | |
| 519 long found = 0; | |
| 520 processorid_t next = 0; | |
| 521 while (found < *id_length && next < MAX_PROCESSOR_ID) { | |
| 522 processor_info_t info; | |
| 523 if (processor_info(next, &info) == 0) { | |
| 524 // NB, PI_NOINTR processors are effectively online ... | |
| 525 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { | |
| 526 (*id_array)[found] = next; | |
| 527 found += 1; | |
| 528 } | |
| 529 } | |
| 530 next += 1; | |
| 531 } | |
| 532 if (found < *id_length) { | |
| 533 // The loop above didn't identify the expected number of processors. | |
| 534 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) | |
| 535 // and re-running the loop, above, but there's no guarantee of progress | |
| 536 // if the system configuration is in flux. Instead, we just return what | |
| 537 // we've got. Note that in the worst case find_processors_online() could | |
| 538 // return an empty set. (As a fall-back in the case of the empty set we | |
| 539 // could just return the ID of the current processor). | |
| 540 *id_length = found ; | |
| 541 } | |
| 542 | |
| 543 return true; | |
| 544 } | |
| 545 | |
| 546 static bool assign_distribution(processorid_t* id_array, | |
| 547 uint id_length, | |
| 548 uint* distribution, | |
| 549 uint distribution_length) { | |
| 550 // We assume we can assign processorid_t's to uint's. | |
| 551 assert(sizeof(processorid_t) == sizeof(uint), | |
| 552 "can't convert processorid_t to uint"); | |
| 553 // Quick check to see if we won't succeed. | |
| 554 if (id_length < distribution_length) { | |
| 555 return false; | |
| 556 } | |
| 557 // Assign processor ids to the distribution. | |
| 558 // Try to shuffle processors to distribute work across boards, | |
| 559 // assuming 4 processors per board. | |
| 560 const uint processors_per_board = ProcessDistributionStride; | |
| 561 // Find the maximum processor id. | |
| 562 processorid_t max_id = 0; | |
| 563 for (uint m = 0; m < id_length; m += 1) { | |
| 564 max_id = MAX2(max_id, id_array[m]); | |
| 565 } | |
| 566 // The next id, to limit loops. | |
| 567 const processorid_t limit_id = max_id + 1; | |
| 568 // Make up markers for available processors. | |
| 569 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); | |
| 570 for (uint c = 0; c < limit_id; c += 1) { | |
| 571 available_id[c] = false; | |
| 572 } | |
| 573 for (uint a = 0; a < id_length; a += 1) { | |
| 574 available_id[id_array[a]] = true; | |
| 575 } | |
| 576 // Step by "boards", then by "slot", copying to "assigned". | |
| 577 // NEEDS_CLEANUP: The assignment of processors should be stateful, | |
| 578 // remembering which processors have been assigned by | |
| 579 // previous calls, etc., so as to distribute several | |
| 580 // independent calls of this method. What we'd like is | |
| 581 // It would be nice to have an API that let us ask | |
| 582 // how many processes are bound to a processor, | |
| 583 // but we don't have that, either. | |
| 584 // In the short term, "board" is static so that | |
| 585 // subsequent distributions don't all start at board 0. | |
| 586 static uint board = 0; | |
| 587 uint assigned = 0; | |
| 588 // Until we've found enough processors .... | |
| 589 while (assigned < distribution_length) { | |
| 590 // ... find the next available processor in the board. | |
| 591 for (uint slot = 0; slot < processors_per_board; slot += 1) { | |
| 592 uint try_id = board * processors_per_board + slot; | |
| 593 if ((try_id < limit_id) && (available_id[try_id] == true)) { | |
| 594 distribution[assigned] = try_id; | |
| 595 available_id[try_id] = false; | |
| 596 assigned += 1; | |
| 597 break; | |
| 598 } | |
| 599 } | |
| 600 board += 1; | |
| 601 if (board * processors_per_board + 0 >= limit_id) { | |
| 602 board = 0; | |
| 603 } | |
| 604 } | |
| 605 if (available_id != NULL) { | |
| 606 FREE_C_HEAP_ARRAY(bool, available_id); | |
| 607 } | |
| 608 return true; | |
| 609 } | |
| 610 | |
| 611 bool os::distribute_processes(uint length, uint* distribution) { | |
| 612 bool result = false; | |
| 613 // Find the processor id's of all the available CPUs. | |
| 614 processorid_t* id_array = NULL; | |
| 615 uint id_length = 0; | |
| 616 // There are some races between querying information and using it, | |
| 617 // since processor sets can change dynamically. | |
| 618 psetid_t pset = PS_NONE; | |
| 619 // Are we running in a processor set? | |
| 620 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { | |
| 621 result = find_processors_in_pset(pset, &id_array, &id_length); | |
| 622 } else { | |
| 623 result = find_processors_online(&id_array, &id_length); | |
| 624 } | |
| 625 if (result == true) { | |
| 626 if (id_length >= length) { | |
| 627 result = assign_distribution(id_array, id_length, distribution, length); | |
| 628 } else { | |
| 629 result = false; | |
| 630 } | |
| 631 } | |
| 632 if (id_array != NULL) { | |
| 633 FREE_C_HEAP_ARRAY(processorid_t, id_array); | |
| 634 } | |
| 635 return result; | |
| 636 } | |
| 637 | |
| 638 bool os::bind_to_processor(uint processor_id) { | |
| 639 // We assume that a processorid_t can be stored in a uint. | |
| 640 assert(sizeof(uint) == sizeof(processorid_t), | |
| 641 "can't convert uint to processorid_t"); | |
| 642 int bind_result = | |
| 643 processor_bind(P_LWPID, // bind LWP. | |
| 644 P_MYID, // bind current LWP. | |
| 645 (processorid_t) processor_id, // id. | |
| 646 NULL); // don't return old binding. | |
| 647 return (bind_result == 0); | |
| 648 } | |
| 649 | |
| 650 bool os::getenv(const char* name, char* buffer, int len) { | |
| 651 char* val = ::getenv( name ); | |
| 652 if ( val == NULL | |
| 653 || strlen(val) + 1 > len ) { | |
| 654 if (len > 0) buffer[0] = 0; // return a null string | |
| 655 return false; | |
| 656 } | |
| 657 strcpy( buffer, val ); | |
| 658 return true; | |
| 659 } | |
| 660 | |
| 661 | |
| 662 // Return true if user is running as root. | |
| 663 | |
| 664 bool os::have_special_privileges() { | |
| 665 static bool init = false; | |
| 666 static bool privileges = false; | |
| 667 if (!init) { | |
| 668 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
| 669 init = true; | |
| 670 } | |
| 671 return privileges; | |
| 672 } | |
| 673 | |
| 674 | |
| 675 static char* get_property(char* name, char* buffer, int buffer_size) { | |
| 676 if (os::getenv(name, buffer, buffer_size)) { | |
| 677 return buffer; | |
| 678 } | |
| 679 static char empty[] = ""; | |
| 680 return empty; | |
| 681 } | |
| 682 | |
| 683 | |
| 684 void os::init_system_properties_values() { | |
| 685 char arch[12]; | |
| 686 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); | |
| 687 | |
| 688 // The next steps are taken in the product version: | |
| 689 // | |
| 690 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. | |
| 691 // This library should be located at: | |
| 692 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. | |
| 693 // | |
| 694 // If "/jre/lib/" appears at the right place in the path, then we | |
| 695 // assume libjvm[_g].so is installed in a JDK and we use this path. | |
| 696 // | |
| 697 // Otherwise exit with message: "Could not create the Java virtual machine." | |
| 698 // | |
| 699 // The following extra steps are taken in the debugging version: | |
| 700 // | |
| 701 // If "/jre/lib/" does NOT appear at the right place in the path | |
| 702 // instead of exit check for $JAVA_HOME environment variable. | |
| 703 // | |
| 704 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, | |
| 705 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so | |
| 706 // it looks like libjvm[_g].so is installed there | |
| 707 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. | |
| 708 // | |
| 709 // Otherwise exit. | |
| 710 // | |
| 711 // Important note: if the location of libjvm.so changes this | |
| 712 // code needs to be changed accordingly. | |
| 713 | |
| 714 // The next few definitions allow the code to be verbatim: | |
| 715 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) | |
| 716 #define free(p) FREE_C_HEAP_ARRAY(char, p) | |
| 717 #define getenv(n) ::getenv(n) | |
| 718 | |
| 719 #define EXTENSIONS_DIR "/lib/ext" | |
| 720 #define ENDORSED_DIR "/lib/endorsed" | |
| 721 #define COMMON_DIR "/usr/jdk/packages" | |
| 722 | |
| 723 { | |
| 724 /* sysclasspath, java_home, dll_dir */ | |
| 725 { | |
| 726 char *home_path; | |
| 727 char *dll_path; | |
| 728 char *pslash; | |
| 729 char buf[MAXPATHLEN]; | |
| 730 os::jvm_path(buf, sizeof(buf)); | |
| 731 | |
| 732 // Found the full path to libjvm.so. | |
| 733 // Now cut the path to <java_home>/jre if we can. | |
| 734 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ | |
| 735 pslash = strrchr(buf, '/'); | |
| 736 if (pslash != NULL) | |
| 737 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ | |
| 738 dll_path = malloc(strlen(buf) + 1); | |
| 739 if (dll_path == NULL) | |
| 740 return; | |
| 741 strcpy(dll_path, buf); | |
| 742 Arguments::set_dll_dir(dll_path); | |
| 743 | |
| 744 if (pslash != NULL) { | |
| 745 pslash = strrchr(buf, '/'); | |
| 746 if (pslash != NULL) { | |
| 747 *pslash = '\0'; /* get rid of /<arch> */ | |
| 748 pslash = strrchr(buf, '/'); | |
| 749 if (pslash != NULL) | |
| 750 *pslash = '\0'; /* get rid of /lib */ | |
| 751 } | |
| 752 } | |
| 753 | |
| 754 home_path = malloc(strlen(buf) + 1); | |
| 755 if (home_path == NULL) | |
| 756 return; | |
| 757 strcpy(home_path, buf); | |
| 758 Arguments::set_java_home(home_path); | |
| 759 | |
| 760 if (!set_boot_path('/', ':')) | |
| 761 return; | |
| 762 } | |
| 763 | |
| 764 /* | |
| 765 * Where to look for native libraries | |
| 766 */ | |
| 767 { | |
| 768 // Use dlinfo() to determine the correct java.library.path. | |
| 769 // | |
| 770 // If we're launched by the Java launcher, and the user | |
| 771 // does not set java.library.path explicitly on the commandline, | |
| 772 // the Java launcher sets LD_LIBRARY_PATH for us and unsets | |
| 773 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case | |
| 774 // dlinfo returns LD_LIBRARY_PATH + crle settings (including | |
| 775 // /usr/lib), which is exactly what we want. | |
| 776 // | |
| 777 // If the user does set java.library.path, it completely | |
| 778 // overwrites this setting, and always has. | |
| 779 // | |
| 780 // If we're not launched by the Java launcher, we may | |
| 781 // get here with any/all of the LD_LIBRARY_PATH[_32|64] | |
| 782 // settings. Again, dlinfo does exactly what we want. | |
| 783 | |
| 784 Dl_serinfo _info, *info = &_info; | |
| 785 Dl_serpath *path; | |
| 786 char* library_path; | |
| 787 char *common_path; | |
| 788 int i; | |
| 789 | |
| 790 // determine search path count and required buffer size | |
| 791 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { | |
| 792 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); | |
| 793 } | |
| 794 | |
| 795 // allocate new buffer and initialize | |
| 796 info = (Dl_serinfo*)malloc(_info.dls_size); | |
| 797 if (info == NULL) { | |
| 798 vm_exit_out_of_memory(_info.dls_size, | |
| 799 "init_system_properties_values info"); | |
| 800 } | |
| 801 info->dls_size = _info.dls_size; | |
| 802 info->dls_cnt = _info.dls_cnt; | |
| 803 | |
| 804 // obtain search path information | |
| 805 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { | |
| 806 free(info); | |
| 807 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); | |
| 808 } | |
| 809 | |
| 810 path = &info->dls_serpath[0]; | |
| 811 | |
| 812 // Note: Due to a legacy implementation, most of the library path | |
| 813 // is set in the launcher. This was to accomodate linking restrictions | |
| 814 // on legacy Solaris implementations (which are no longer supported). | |
| 815 // Eventually, all the library path setting will be done here. | |
| 816 // | |
| 817 // However, to prevent the proliferation of improperly built native | |
| 818 // libraries, the new path component /usr/jdk/packages is added here. | |
| 819 | |
| 820 // Determine the actual CPU architecture. | |
| 821 char cpu_arch[12]; | |
| 822 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); | |
| 823 #ifdef _LP64 | |
| 824 // If we are a 64-bit vm, perform the following translations: | |
| 825 // sparc -> sparcv9 | |
| 826 // i386 -> amd64 | |
| 827 if (strcmp(cpu_arch, "sparc") == 0) | |
| 828 strcat(cpu_arch, "v9"); | |
| 829 else if (strcmp(cpu_arch, "i386") == 0) | |
| 830 strcpy(cpu_arch, "amd64"); | |
| 831 #endif | |
| 832 | |
| 833 // Construct the invariant part of ld_library_path. Note that the | |
| 834 // space for the colon and the trailing null are provided by the | |
| 835 // nulls included by the sizeof operator. | |
| 836 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); | |
| 837 common_path = malloc(bufsize); | |
| 838 if (common_path == NULL) { | |
| 839 free(info); | |
| 840 vm_exit_out_of_memory(bufsize, | |
| 841 "init_system_properties_values common_path"); | |
| 842 } | |
| 843 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); | |
| 844 | |
| 845 // struct size is more than sufficient for the path components obtained | |
| 846 // through the dlinfo() call, so only add additional space for the path | |
| 847 // components explicitly added here. | |
| 848 bufsize = info->dls_size + strlen(common_path); | |
| 849 library_path = malloc(bufsize); | |
| 850 if (library_path == NULL) { | |
| 851 free(info); | |
| 852 free(common_path); | |
| 853 vm_exit_out_of_memory(bufsize, | |
| 854 "init_system_properties_values library_path"); | |
| 855 } | |
| 856 library_path[0] = '\0'; | |
| 857 | |
| 858 // Construct the desired Java library path from the linker's library | |
| 859 // search path. | |
| 860 // | |
| 861 // For compatibility, it is optimal that we insert the additional path | |
| 862 // components specific to the Java VM after those components specified | |
| 863 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so | |
| 864 // infrastructure. | |
| 865 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it | |
| 866 strcpy(library_path, common_path); | |
| 867 } else { | |
| 868 int inserted = 0; | |
| 869 for (i = 0; i < info->dls_cnt; i++, path++) { | |
| 870 uint_t flags = path->dls_flags & LA_SER_MASK; | |
| 871 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { | |
| 872 strcat(library_path, common_path); | |
| 873 strcat(library_path, os::path_separator()); | |
| 874 inserted = 1; | |
| 875 } | |
| 876 strcat(library_path, path->dls_name); | |
| 877 strcat(library_path, os::path_separator()); | |
| 878 } | |
| 879 // eliminate trailing path separator | |
| 880 library_path[strlen(library_path)-1] = '\0'; | |
| 881 } | |
| 882 | |
| 883 // happens before argument parsing - can't use a trace flag | |
| 884 // tty->print_raw("init_system_properties_values: native lib path: "); | |
| 885 // tty->print_raw_cr(library_path); | |
| 886 | |
| 887 // callee copies into its own buffer | |
| 888 Arguments::set_library_path(library_path); | |
| 889 | |
| 890 free(common_path); | |
| 891 free(library_path); | |
| 892 free(info); | |
| 893 } | |
| 894 | |
| 895 /* | |
| 896 * Extensions directories. | |
| 897 * | |
| 898 * Note that the space for the colon and the trailing null are provided | |
| 899 * by the nulls included by the sizeof operator (so actually one byte more | |
| 900 * than necessary is allocated). | |
| 901 */ | |
| 902 { | |
| 903 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + | |
| 904 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + | |
| 905 sizeof(EXTENSIONS_DIR)); | |
| 906 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, | |
| 907 Arguments::get_java_home()); | |
| 908 Arguments::set_ext_dirs(buf); | |
| 909 } | |
| 910 | |
| 911 /* Endorsed standards default directory. */ | |
| 912 { | |
| 913 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); | |
| 914 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); | |
| 915 Arguments::set_endorsed_dirs(buf); | |
| 916 } | |
| 917 } | |
| 918 | |
| 919 #undef malloc | |
| 920 #undef free | |
| 921 #undef getenv | |
| 922 #undef EXTENSIONS_DIR | |
| 923 #undef ENDORSED_DIR | |
| 924 #undef COMMON_DIR | |
| 925 | |
| 926 } | |
| 927 | |
| 928 void os::breakpoint() { | |
| 929 BREAKPOINT; | |
| 930 } | |
| 931 | |
| 932 bool os::obsolete_option(const JavaVMOption *option) | |
| 933 { | |
| 934 if (!strncmp(option->optionString, "-Xt", 3)) { | |
| 935 return true; | |
| 936 } else if (!strncmp(option->optionString, "-Xtm", 4)) { | |
| 937 return true; | |
| 938 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { | |
| 939 return true; | |
| 940 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { | |
| 941 return true; | |
| 942 } | |
| 943 return false; | |
| 944 } | |
| 945 | |
| 946 bool os::Solaris::valid_stack_address(Thread* thread, address sp) { | |
| 947 address stackStart = (address)thread->stack_base(); | |
| 948 address stackEnd = (address)(stackStart - (address)thread->stack_size()); | |
| 949 if (sp < stackStart && sp >= stackEnd ) return true; | |
| 950 return false; | |
| 951 } | |
| 952 | |
| 953 extern "C" void breakpoint() { | |
| 954 // use debugger to set breakpoint here | |
| 955 } | |
| 956 | |
| 957 // Returns an estimate of the current stack pointer. Result must be guaranteed to | |
| 958 // point into the calling threads stack, and be no lower than the current stack | |
| 959 // pointer. | |
| 960 address os::current_stack_pointer() { | |
| 961 volatile int dummy; | |
| 962 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right | |
| 963 return sp; | |
| 964 } | |
| 965 | |
| 966 static thread_t main_thread; | |
| 967 | |
| 968 // Thread start routine for all new Java threads | |
| 969 extern "C" void* java_start(void* thread_addr) { | |
| 970 // Try to randomize the cache line index of hot stack frames. | |
| 971 // This helps when threads of the same stack traces evict each other's | |
| 972 // cache lines. The threads can be either from the same JVM instance, or | |
| 973 // from different JVM instances. The benefit is especially true for | |
| 974 // processors with hyperthreading technology. | |
| 975 static int counter = 0; | |
| 976 int pid = os::current_process_id(); | |
| 977 alloca(((pid ^ counter++) & 7) * 128); | |
| 978 | |
| 979 int prio; | |
| 980 Thread* thread = (Thread*)thread_addr; | |
| 981 OSThread* osthr = thread->osthread(); | |
| 982 | |
| 983 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound | |
| 984 thread->_schedctl = (void *) schedctl_init () ; | |
| 985 | |
| 986 if (UseNUMA) { | |
| 987 int lgrp_id = os::numa_get_group_id(); | |
| 988 if (lgrp_id != -1) { | |
| 989 thread->set_lgrp_id(lgrp_id); | |
| 990 } | |
| 991 } | |
| 992 | |
| 993 // If the creator called set priority before we started, | |
| 994 // we need to call set priority now that we have an lwp. | |
| 995 // Get the priority from libthread and set the priority | |
| 996 // for the new Solaris lwp. | |
| 997 if ( osthr->thread_id() != -1 ) { | |
| 998 if ( UseThreadPriorities ) { | |
| 999 thr_getprio(osthr->thread_id(), &prio); | |
| 1000 if (ThreadPriorityVerbose) { | |
| 1001 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", | |
| 1002 osthr->thread_id(), osthr->lwp_id(), prio ); | |
| 1003 } | |
| 1004 os::set_native_priority(thread, prio); | |
| 1005 } | |
| 1006 } else if (ThreadPriorityVerbose) { | |
| 1007 warning("Can't set priority in _start routine, thread id hasn't been set\n"); | |
| 1008 } | |
| 1009 | |
| 1010 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); | |
| 1011 | |
| 1012 // initialize signal mask for this thread | |
| 1013 os::Solaris::hotspot_sigmask(thread); | |
| 1014 | |
| 1015 thread->run(); | |
| 1016 | |
| 1017 // One less thread is executing | |
| 1018 // When the VMThread gets here, the main thread may have already exited | |
| 1019 // which frees the CodeHeap containing the Atomic::dec code | |
| 1020 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { | |
| 1021 Atomic::dec(&os::Solaris::_os_thread_count); | |
| 1022 } | |
| 1023 | |
| 1024 if (UseDetachedThreads) { | |
| 1025 thr_exit(NULL); | |
| 1026 ShouldNotReachHere(); | |
| 1027 } | |
| 1028 return NULL; | |
| 1029 } | |
| 1030 | |
| 1031 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { | |
| 1032 // Allocate the OSThread object | |
| 1033 OSThread* osthread = new OSThread(NULL, NULL); | |
| 1034 if (osthread == NULL) return NULL; | |
| 1035 | |
| 1036 // Store info on the Solaris thread into the OSThread | |
| 1037 osthread->set_thread_id(thread_id); | |
| 1038 osthread->set_lwp_id(_lwp_self()); | |
| 1039 thread->_schedctl = (void *) schedctl_init () ; | |
| 1040 | |
| 1041 if (UseNUMA) { | |
| 1042 int lgrp_id = os::numa_get_group_id(); | |
| 1043 if (lgrp_id != -1) { | |
| 1044 thread->set_lgrp_id(lgrp_id); | |
| 1045 } | |
| 1046 } | |
| 1047 | |
| 1048 if ( ThreadPriorityVerbose ) { | |
| 1049 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", | |
| 1050 osthread->thread_id(), osthread->lwp_id() ); | |
| 1051 } | |
| 1052 | |
| 1053 // Initial thread state is INITIALIZED, not SUSPENDED | |
| 1054 osthread->set_state(INITIALIZED); | |
| 1055 | |
| 1056 return osthread; | |
| 1057 } | |
| 1058 | |
| 1059 void os::Solaris::hotspot_sigmask(Thread* thread) { | |
| 1060 | |
| 1061 //Save caller's signal mask | |
| 1062 sigset_t sigmask; | |
| 1063 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); | |
| 1064 OSThread *osthread = thread->osthread(); | |
| 1065 osthread->set_caller_sigmask(sigmask); | |
| 1066 | |
| 1067 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); | |
| 1068 if (!ReduceSignalUsage) { | |
| 1069 if (thread->is_VM_thread()) { | |
| 1070 // Only the VM thread handles BREAK_SIGNAL ... | |
| 1071 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); | |
| 1072 } else { | |
| 1073 // ... all other threads block BREAK_SIGNAL | |
| 1074 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); | |
| 1075 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); | |
| 1076 } | |
| 1077 } | |
| 1078 } | |
| 1079 | |
| 1080 bool os::create_attached_thread(JavaThread* thread) { | |
| 1081 #ifdef ASSERT | |
| 1082 thread->verify_not_published(); | |
| 1083 #endif | |
| 1084 OSThread* osthread = create_os_thread(thread, thr_self()); | |
| 1085 if (osthread == NULL) { | |
| 1086 return false; | |
| 1087 } | |
| 1088 | |
| 1089 // Initial thread state is RUNNABLE | |
| 1090 osthread->set_state(RUNNABLE); | |
| 1091 thread->set_osthread(osthread); | |
| 1092 | |
| 1093 // initialize signal mask for this thread | |
| 1094 // and save the caller's signal mask | |
| 1095 os::Solaris::hotspot_sigmask(thread); | |
| 1096 | |
| 1097 return true; | |
| 1098 } | |
| 1099 | |
| 1100 bool os::create_main_thread(JavaThread* thread) { | |
| 1101 #ifdef ASSERT | |
| 1102 thread->verify_not_published(); | |
| 1103 #endif | |
| 1104 if (_starting_thread == NULL) { | |
| 1105 _starting_thread = create_os_thread(thread, main_thread); | |
| 1106 if (_starting_thread == NULL) { | |
| 1107 return false; | |
| 1108 } | |
| 1109 } | |
| 1110 | |
| 1111 // The primodial thread is runnable from the start | |
| 1112 _starting_thread->set_state(RUNNABLE); | |
| 1113 | |
| 1114 thread->set_osthread(_starting_thread); | |
| 1115 | |
| 1116 // initialize signal mask for this thread | |
| 1117 // and save the caller's signal mask | |
| 1118 os::Solaris::hotspot_sigmask(thread); | |
| 1119 | |
| 1120 return true; | |
| 1121 } | |
| 1122 | |
| 1123 // _T2_libthread is true if we believe we are running with the newer | |
| 1124 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default) | |
| 1125 bool os::Solaris::_T2_libthread = false; | |
| 1126 | |
| 1127 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
| 1128 // Allocate the OSThread object | |
| 1129 OSThread* osthread = new OSThread(NULL, NULL); | |
| 1130 if (osthread == NULL) { | |
| 1131 return false; | |
| 1132 } | |
| 1133 | |
| 1134 if ( ThreadPriorityVerbose ) { | |
| 1135 char *thrtyp; | |
| 1136 switch ( thr_type ) { | |
| 1137 case vm_thread: | |
| 1138 thrtyp = (char *)"vm"; | |
| 1139 break; | |
| 1140 case cgc_thread: | |
| 1141 thrtyp = (char *)"cgc"; | |
| 1142 break; | |
| 1143 case pgc_thread: | |
| 1144 thrtyp = (char *)"pgc"; | |
| 1145 break; | |
| 1146 case java_thread: | |
| 1147 thrtyp = (char *)"java"; | |
| 1148 break; | |
| 1149 case compiler_thread: | |
| 1150 thrtyp = (char *)"compiler"; | |
| 1151 break; | |
| 1152 case watcher_thread: | |
| 1153 thrtyp = (char *)"watcher"; | |
| 1154 break; | |
| 1155 default: | |
| 1156 thrtyp = (char *)"unknown"; | |
| 1157 break; | |
| 1158 } | |
| 1159 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); | |
| 1160 } | |
| 1161 | |
| 1162 // Calculate stack size if it's not specified by caller. | |
| 1163 if (stack_size == 0) { | |
| 1164 // The default stack size 1M (2M for LP64). | |
| 1165 stack_size = (BytesPerWord >> 2) * K * K; | |
| 1166 | |
| 1167 switch (thr_type) { | |
| 1168 case os::java_thread: | |
| 1169 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss | |
| 1170 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); | |
| 1171 break; | |
| 1172 case os::compiler_thread: | |
| 1173 if (CompilerThreadStackSize > 0) { | |
| 1174 stack_size = (size_t)(CompilerThreadStackSize * K); | |
| 1175 break; | |
| 1176 } // else fall through: | |
| 1177 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
| 1178 case os::vm_thread: | |
| 1179 case os::pgc_thread: | |
| 1180 case os::cgc_thread: | |
| 1181 case os::watcher_thread: | |
| 1182 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
| 1183 break; | |
| 1184 } | |
| 1185 } | |
| 1186 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); | |
| 1187 | |
| 1188 // Initial state is ALLOCATED but not INITIALIZED | |
| 1189 osthread->set_state(ALLOCATED); | |
| 1190 | |
| 1191 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { | |
| 1192 // We got lots of threads. Check if we still have some address space left. | |
| 1193 // Need to be at least 5Mb of unreserved address space. We do check by | |
| 1194 // trying to reserve some. | |
| 1195 const size_t VirtualMemoryBangSize = 20*K*K; | |
| 1196 char* mem = os::reserve_memory(VirtualMemoryBangSize); | |
| 1197 if (mem == NULL) { | |
| 1198 delete osthread; | |
| 1199 return false; | |
| 1200 } else { | |
| 1201 // Release the memory again | |
| 1202 os::release_memory(mem, VirtualMemoryBangSize); | |
| 1203 } | |
| 1204 } | |
| 1205 | |
| 1206 // Setup osthread because the child thread may need it. | |
| 1207 thread->set_osthread(osthread); | |
| 1208 | |
| 1209 // Create the Solaris thread | |
| 1210 // explicit THR_BOUND for T2_libthread case in case | |
| 1211 // that assumption is not accurate, but our alternate signal stack | |
| 1212 // handling is based on it which must have bound threads | |
| 1213 thread_t tid = 0; | |
| 1214 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED | |
| 1215 | ((UseBoundThreads || os::Solaris::T2_libthread() || | |
| 1216 (thr_type == vm_thread) || | |
| 1217 (thr_type == cgc_thread) || | |
| 1218 (thr_type == pgc_thread) || | |
| 1219 (thr_type == compiler_thread && BackgroundCompilation)) ? | |
| 1220 THR_BOUND : 0); | |
| 1221 int status; | |
| 1222 | |
| 1223 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. | |
| 1224 // | |
| 1225 // On multiprocessors systems, libthread sometimes under-provisions our | |
| 1226 // process with LWPs. On a 30-way systems, for instance, we could have | |
| 1227 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned | |
| 1228 // to our process. This can result in under utilization of PEs. | |
| 1229 // I suspect the problem is related to libthread's LWP | |
| 1230 // pool management and to the kernel's SIGBLOCKING "last LWP parked" | |
| 1231 // upcall policy. | |
| 1232 // | |
| 1233 // The following code is palliative -- it attempts to ensure that our | |
| 1234 // process has sufficient LWPs to take advantage of multiple PEs. | |
| 1235 // Proper long-term cures include using user-level threads bound to LWPs | |
| 1236 // (THR_BOUND) or using LWP-based synchronization. Note that there is a | |
| 1237 // slight timing window with respect to sampling _os_thread_count, but | |
| 1238 // the race is benign. Also, we should periodically recompute | |
| 1239 // _processors_online as the min of SC_NPROCESSORS_ONLN and the | |
| 1240 // the number of PEs in our partition. You might be tempted to use | |
| 1241 // THR_NEW_LWP here, but I'd recommend against it as that could | |
| 1242 // result in undesirable growth of the libthread's LWP pool. | |
| 1243 // The fix below isn't sufficient; for instance, it doesn't take into count | |
| 1244 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. | |
| 1245 // | |
| 1246 // Some pathologies this scheme doesn't handle: | |
| 1247 // * Threads can block, releasing the LWPs. The LWPs can age out. | |
| 1248 // When a large number of threads become ready again there aren't | |
| 1249 // enough LWPs available to service them. This can occur when the | |
| 1250 // number of ready threads oscillates. | |
| 1251 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. | |
| 1252 // | |
| 1253 // Finally, we should call thr_setconcurrency() periodically to refresh | |
| 1254 // the LWP pool and thwart the LWP age-out mechanism. | |
| 1255 // The "+3" term provides a little slop -- we want to slightly overprovision. | |
| 1256 | |
| 1257 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { | |
| 1258 if (!(flags & THR_BOUND)) { | |
| 1259 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation | |
| 1260 } | |
| 1261 } | |
| 1262 // Although this doesn't hurt, we should warn of undefined behavior | |
| 1263 // when using unbound T1 threads with schedctl(). This should never | |
| 1264 // happen, as the compiler and VM threads are always created bound | |
| 1265 DEBUG_ONLY( | |
| 1266 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && | |
| 1267 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && | |
| 1268 ((thr_type == vm_thread) || (thr_type == cgc_thread) || | |
| 1269 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { | |
| 1270 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); | |
| 1271 } | |
| 1272 ); | |
| 1273 | |
| 1274 | |
| 1275 // Mark that we don't have an lwp or thread id yet. | |
| 1276 // In case we attempt to set the priority before the thread starts. | |
| 1277 osthread->set_lwp_id(-1); | |
| 1278 osthread->set_thread_id(-1); | |
| 1279 | |
| 1280 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); | |
| 1281 if (status != 0) { | |
| 1282 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1283 perror("os::create_thread"); | |
| 1284 } | |
| 1285 thread->set_osthread(NULL); | |
| 1286 // Need to clean up stuff we've allocated so far | |
| 1287 delete osthread; | |
| 1288 return false; | |
| 1289 } | |
| 1290 | |
| 1291 Atomic::inc(&os::Solaris::_os_thread_count); | |
| 1292 | |
| 1293 // Store info on the Solaris thread into the OSThread | |
| 1294 osthread->set_thread_id(tid); | |
| 1295 | |
| 1296 // Remember that we created this thread so we can set priority on it | |
| 1297 osthread->set_vm_created(); | |
| 1298 | |
| 1299 // Set the default thread priority otherwise use NormalPriority | |
| 1300 | |
| 1301 if ( UseThreadPriorities ) { | |
| 1302 thr_setprio(tid, (DefaultThreadPriority == -1) ? | |
| 1303 java_to_os_priority[NormPriority] : | |
| 1304 DefaultThreadPriority); | |
| 1305 } | |
| 1306 | |
| 1307 // Initial thread state is INITIALIZED, not SUSPENDED | |
| 1308 osthread->set_state(INITIALIZED); | |
| 1309 | |
| 1310 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain | |
| 1311 return true; | |
| 1312 } | |
| 1313 | |
| 1314 /* defined for >= Solaris 10. This allows builds on earlier versions | |
| 1315 * of Solaris to take advantage of the newly reserved Solaris JVM signals | |
| 1316 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 | |
| 1317 * and -XX:+UseAltSigs does nothing since these should have no conflict | |
| 1318 */ | |
| 1319 #if !defined(SIGJVM1) | |
| 1320 #define SIGJVM1 39 | |
| 1321 #define SIGJVM2 40 | |
| 1322 #endif | |
| 1323 | |
| 1324 debug_only(static bool signal_sets_initialized = false); | |
| 1325 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
| 1326 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; | |
| 1327 int os::Solaris::_SIGasync = ASYNC_SIGNAL; | |
| 1328 | |
| 1329 bool os::Solaris::is_sig_ignored(int sig) { | |
| 1330 struct sigaction oact; | |
| 1331 sigaction(sig, (struct sigaction*)NULL, &oact); | |
| 1332 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
| 1333 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
| 1334 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
| 1335 return true; | |
| 1336 else | |
| 1337 return false; | |
| 1338 } | |
| 1339 | |
| 1340 // Note: SIGRTMIN is a macro that calls sysconf() so it will | |
| 1341 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime | |
| 1342 static bool isJVM1available() { | |
| 1343 return SIGJVM1 < SIGRTMIN; | |
| 1344 } | |
| 1345 | |
| 1346 void os::Solaris::signal_sets_init() { | |
| 1347 // Should also have an assertion stating we are still single-threaded. | |
| 1348 assert(!signal_sets_initialized, "Already initialized"); | |
| 1349 // Fill in signals that are necessarily unblocked for all threads in | |
| 1350 // the VM. Currently, we unblock the following signals: | |
| 1351 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
| 1352 // by -Xrs (=ReduceSignalUsage)); | |
| 1353 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
| 1354 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
| 1355 // the dispositions or masks wrt these signals. | |
| 1356 // Programs embedding the VM that want to use the above signals for their | |
| 1357 // own purposes must, at this time, use the "-Xrs" option to prevent | |
| 1358 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
| 1359 // (See bug 4345157, and other related bugs). | |
| 1360 // In reality, though, unblocking these signals is really a nop, since | |
| 1361 // these signals are not blocked by default. | |
| 1362 sigemptyset(&unblocked_sigs); | |
| 1363 sigemptyset(&allowdebug_blocked_sigs); | |
| 1364 sigaddset(&unblocked_sigs, SIGILL); | |
| 1365 sigaddset(&unblocked_sigs, SIGSEGV); | |
| 1366 sigaddset(&unblocked_sigs, SIGBUS); | |
| 1367 sigaddset(&unblocked_sigs, SIGFPE); | |
| 1368 | |
| 1369 if (isJVM1available) { | |
| 1370 os::Solaris::set_SIGinterrupt(SIGJVM1); | |
| 1371 os::Solaris::set_SIGasync(SIGJVM2); | |
| 1372 } else if (UseAltSigs) { | |
| 1373 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); | |
| 1374 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); | |
| 1375 } else { | |
| 1376 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); | |
| 1377 os::Solaris::set_SIGasync(ASYNC_SIGNAL); | |
| 1378 } | |
| 1379 | |
| 1380 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); | |
| 1381 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); | |
| 1382 | |
| 1383 if (!ReduceSignalUsage) { | |
| 1384 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
| 1385 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
| 1386 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
| 1387 } | |
| 1388 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
| 1389 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
| 1390 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
| 1391 } | |
| 1392 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
| 1393 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
| 1394 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
| 1395 } | |
| 1396 } | |
| 1397 // Fill in signals that are blocked by all but the VM thread. | |
| 1398 sigemptyset(&vm_sigs); | |
| 1399 if (!ReduceSignalUsage) | |
| 1400 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
| 1401 debug_only(signal_sets_initialized = true); | |
| 1402 | |
| 1403 // For diagnostics only used in run_periodic_checks | |
| 1404 sigemptyset(&check_signal_done); | |
| 1405 } | |
| 1406 | |
| 1407 // These are signals that are unblocked while a thread is running Java. | |
| 1408 // (For some reason, they get blocked by default.) | |
| 1409 sigset_t* os::Solaris::unblocked_signals() { | |
| 1410 assert(signal_sets_initialized, "Not initialized"); | |
| 1411 return &unblocked_sigs; | |
| 1412 } | |
| 1413 | |
| 1414 // These are the signals that are blocked while a (non-VM) thread is | |
| 1415 // running Java. Only the VM thread handles these signals. | |
| 1416 sigset_t* os::Solaris::vm_signals() { | |
| 1417 assert(signal_sets_initialized, "Not initialized"); | |
| 1418 return &vm_sigs; | |
| 1419 } | |
| 1420 | |
| 1421 // These are signals that are blocked during cond_wait to allow debugger in | |
| 1422 sigset_t* os::Solaris::allowdebug_blocked_signals() { | |
| 1423 assert(signal_sets_initialized, "Not initialized"); | |
| 1424 return &allowdebug_blocked_sigs; | |
| 1425 } | |
| 1426 | |
| 1427 // First crack at OS-specific initialization, from inside the new thread. | |
| 1428 void os::initialize_thread() { | |
| 1429 int r = thr_main() ; | |
| 1430 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; | |
| 1431 if (r) { | |
| 1432 JavaThread* jt = (JavaThread *)Thread::current(); | |
| 1433 assert(jt != NULL,"Sanity check"); | |
| 1434 size_t stack_size; | |
| 1435 address base = jt->stack_base(); | |
| 1436 if (Arguments::created_by_java_launcher()) { | |
| 1437 // Use 2MB to allow for Solaris 7 64 bit mode. | |
| 1438 stack_size = JavaThread::stack_size_at_create() == 0 | |
| 1439 ? 2048*K : JavaThread::stack_size_at_create(); | |
| 1440 | |
| 1441 // There are rare cases when we may have already used more than | |
| 1442 // the basic stack size allotment before this method is invoked. | |
| 1443 // Attempt to allow for a normally sized java_stack. | |
| 1444 size_t current_stack_offset = (size_t)(base - (address)&stack_size); | |
| 1445 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); | |
| 1446 } else { | |
| 1447 // 6269555: If we were not created by a Java launcher, i.e. if we are | |
| 1448 // running embedded in a native application, treat the primordial thread | |
| 1449 // as much like a native attached thread as possible. This means using | |
| 1450 // the current stack size from thr_stksegment(), unless it is too large | |
| 1451 // to reliably setup guard pages. A reasonable max size is 8MB. | |
| 1452 size_t current_size = current_stack_size(); | |
| 1453 // This should never happen, but just in case.... | |
| 1454 if (current_size == 0) current_size = 2 * K * K; | |
| 1455 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; | |
| 1456 } | |
| 1457 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; | |
| 1458 stack_size = (size_t)(base - bottom); | |
| 1459 | |
| 1460 assert(stack_size > 0, "Stack size calculation problem"); | |
| 1461 | |
| 1462 if (stack_size > jt->stack_size()) { | |
| 1463 NOT_PRODUCT( | |
| 1464 struct rlimit limits; | |
| 1465 getrlimit(RLIMIT_STACK, &limits); | |
| 1466 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); | |
| 1467 assert(size >= jt->stack_size(), "Stack size problem in main thread"); | |
| 1468 ) | |
| 1469 tty->print_cr( | |
| 1470 "Stack size of %d Kb exceeds current limit of %d Kb.\n" | |
| 1471 "(Stack sizes are rounded up to a multiple of the system page size.)\n" | |
| 1472 "See limit(1) to increase the stack size limit.", | |
| 1473 stack_size / K, jt->stack_size() / K); | |
| 1474 vm_exit(1); | |
| 1475 } | |
| 1476 assert(jt->stack_size() >= stack_size, | |
| 1477 "Attempt to map more stack than was allocated"); | |
| 1478 jt->set_stack_size(stack_size); | |
| 1479 } | |
| 1480 | |
| 1481 // 5/22/01: Right now alternate signal stacks do not handle | |
| 1482 // throwing stack overflow exceptions, see bug 4463178 | |
| 1483 // Until a fix is found for this, T2 will NOT imply alternate signal | |
| 1484 // stacks. | |
| 1485 // If using T2 libthread threads, install an alternate signal stack. | |
| 1486 // Because alternate stacks associate with LWPs on Solaris, | |
| 1487 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads | |
| 1488 // we prefer to explicitly stack bang. | |
| 1489 // If not using T2 libthread, but using UseBoundThreads any threads | |
| 1490 // (primordial thread, jni_attachCurrentThread) we do not create, | |
| 1491 // probably are not bound, therefore they can not have an alternate | |
| 1492 // signal stack. Since our stack banging code is generated and | |
| 1493 // is shared across threads, all threads must be bound to allow | |
| 1494 // using alternate signal stacks. The alternative is to interpose | |
| 1495 // on _lwp_create to associate an alt sig stack with each LWP, | |
| 1496 // and this could be a problem when the JVM is embedded. | |
| 1497 // We would prefer to use alternate signal stacks with T2 | |
| 1498 // Since there is currently no accurate way to detect T2 | |
| 1499 // we do not. Assuming T2 when running T1 causes sig 11s or assertions | |
| 1500 // on installing alternate signal stacks | |
| 1501 | |
| 1502 | |
| 1503 // 05/09/03: removed alternate signal stack support for Solaris | |
| 1504 // The alternate signal stack mechanism is no longer needed to | |
| 1505 // handle stack overflow. This is now handled by allocating | |
| 1506 // guard pages (red zone) and stackbanging. | |
| 1507 // Initially the alternate signal stack mechanism was removed because | |
| 1508 // it did not work with T1 llibthread. Alternate | |
| 1509 // signal stacks MUST have all threads bound to lwps. Applications | |
| 1510 // can create their own threads and attach them without their being | |
| 1511 // bound under T1. This is frequently the case for the primordial thread. | |
| 1512 // If we were ever to reenable this mechanism we would need to | |
| 1513 // use the dynamic check for T2 libthread. | |
| 1514 | |
| 1515 os::Solaris::init_thread_fpu_state(); | |
| 1516 } | |
| 1517 | |
| 1518 | |
| 1519 | |
| 1520 // Free Solaris resources related to the OSThread | |
| 1521 void os::free_thread(OSThread* osthread) { | |
| 1522 assert(osthread != NULL, "os::free_thread but osthread not set"); | |
| 1523 | |
| 1524 | |
| 1525 // We are told to free resources of the argument thread, | |
| 1526 // but we can only really operate on the current thread. | |
| 1527 // The main thread must take the VMThread down synchronously | |
| 1528 // before the main thread exits and frees up CodeHeap | |
| 1529 guarantee((Thread::current()->osthread() == osthread | |
| 1530 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); | |
| 1531 if (Thread::current()->osthread() == osthread) { | |
| 1532 // Restore caller's signal mask | |
| 1533 sigset_t sigmask = osthread->caller_sigmask(); | |
| 1534 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); | |
| 1535 } | |
| 1536 delete osthread; | |
| 1537 } | |
| 1538 | |
| 1539 void os::pd_start_thread(Thread* thread) { | |
| 1540 int status = thr_continue(thread->osthread()->thread_id()); | |
| 1541 assert_status(status == 0, status, "thr_continue failed"); | |
| 1542 } | |
| 1543 | |
| 1544 | |
| 1545 intx os::current_thread_id() { | |
| 1546 return (intx)thr_self(); | |
| 1547 } | |
| 1548 | |
| 1549 static pid_t _initial_pid = 0; | |
| 1550 | |
| 1551 int os::current_process_id() { | |
| 1552 return (int)(_initial_pid ? _initial_pid : getpid()); | |
| 1553 } | |
| 1554 | |
| 1555 int os::allocate_thread_local_storage() { | |
| 1556 // %%% in Win32 this allocates a memory segment pointed to by a | |
| 1557 // register. Dan Stein can implement a similar feature in | |
| 1558 // Solaris. Alternatively, the VM can do the same thing | |
| 1559 // explicitly: malloc some storage and keep the pointer in a | |
| 1560 // register (which is part of the thread's context) (or keep it | |
| 1561 // in TLS). | |
| 1562 // %%% In current versions of Solaris, thr_self and TSD can | |
| 1563 // be accessed via short sequences of displaced indirections. | |
| 1564 // The value of thr_self is available as %g7(36). | |
| 1565 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), | |
| 1566 // assuming that the current thread already has a value bound to k. | |
| 1567 // It may be worth experimenting with such access patterns, | |
| 1568 // and later having the parameters formally exported from a Solaris | |
| 1569 // interface. I think, however, that it will be faster to | |
| 1570 // maintain the invariant that %g2 always contains the | |
| 1571 // JavaThread in Java code, and have stubs simply | |
| 1572 // treat %g2 as a caller-save register, preserving it in a %lN. | |
| 1573 thread_key_t tk; | |
| 1574 if (thr_keycreate( &tk, NULL ) ) | |
| 1575 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); | |
| 1576 return int(tk); | |
| 1577 } | |
| 1578 | |
| 1579 void os::free_thread_local_storage(int index) { | |
| 1580 // %%% don't think we need anything here | |
| 1581 // if ( pthread_key_delete((pthread_key_t) tk) ) | |
| 1582 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); | |
| 1583 } | |
| 1584 | |
| 1585 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific | |
| 1586 // small number - point is NO swap space available | |
| 1587 void os::thread_local_storage_at_put(int index, void* value) { | |
| 1588 // %%% this is used only in threadLocalStorage.cpp | |
| 1589 if (thr_setspecific((thread_key_t)index, value)) { | |
| 1590 if (errno == ENOMEM) { | |
| 1591 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); | |
| 1592 } else { | |
| 1593 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); | |
| 1594 } | |
| 1595 } else { | |
| 1596 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; | |
| 1597 } | |
| 1598 } | |
| 1599 | |
| 1600 // This function could be called before TLS is initialized, for example, when | |
| 1601 // VM receives an async signal or when VM causes a fatal error during | |
| 1602 // initialization. Return NULL if thr_getspecific() fails. | |
| 1603 void* os::thread_local_storage_at(int index) { | |
| 1604 // %%% this is used only in threadLocalStorage.cpp | |
| 1605 void* r = NULL; | |
| 1606 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; | |
| 1607 } | |
| 1608 | |
| 1609 | |
| 1610 const int NANOSECS_PER_MILLISECS = 1000000; | |
| 1611 // gethrtime can move backwards if read from one cpu and then a different cpu | |
| 1612 // getTimeNanos is guaranteed to not move backward on Solaris | |
| 1613 // local spinloop created as faster for a CAS on an int than | |
| 1614 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not | |
| 1615 // supported on sparc v8 or pre supports_cx8 intel boxes. | |
| 1616 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong | |
| 1617 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes | |
| 1618 inline hrtime_t oldgetTimeNanos() { | |
| 1619 int gotlock = LOCK_INVALID; | |
| 1620 hrtime_t newtime = gethrtime(); | |
| 1621 | |
| 1622 for (;;) { | |
| 1623 // grab lock for max_hrtime | |
| 1624 int curlock = max_hrtime_lock; | |
| 1625 if (curlock & LOCK_BUSY) continue; | |
| 1626 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; | |
| 1627 if (newtime > max_hrtime) { | |
| 1628 max_hrtime = newtime; | |
| 1629 } else { | |
| 1630 newtime = max_hrtime; | |
| 1631 } | |
| 1632 // release lock | |
| 1633 max_hrtime_lock = LOCK_FREE; | |
| 1634 return newtime; | |
| 1635 } | |
| 1636 } | |
| 1637 // gethrtime can move backwards if read from one cpu and then a different cpu | |
| 1638 // getTimeNanos is guaranteed to not move backward on Solaris | |
| 1639 inline hrtime_t getTimeNanos() { | |
| 1640 if (VM_Version::supports_cx8()) { | |
| 1641 bool retry = false; | |
| 1642 hrtime_t newtime = gethrtime(); | |
| 1643 hrtime_t oldmaxtime = max_hrtime; | |
| 1644 hrtime_t retmaxtime = oldmaxtime; | |
| 1645 while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) { | |
| 1646 oldmaxtime = retmaxtime; | |
| 1647 retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime); | |
| 1648 retry = true; | |
| 1649 } | |
| 1650 return (newtime > retmaxtime) ? newtime : retmaxtime; | |
| 1651 } else { | |
| 1652 return oldgetTimeNanos(); | |
| 1653 } | |
| 1654 } | |
| 1655 | |
| 1656 // Time since start-up in seconds to a fine granularity. | |
| 1657 // Used by VMSelfDestructTimer and the MemProfiler. | |
| 1658 double os::elapsedTime() { | |
| 1659 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; | |
| 1660 } | |
| 1661 | |
| 1662 jlong os::elapsed_counter() { | |
| 1663 return (jlong)(getTimeNanos() - first_hrtime); | |
| 1664 } | |
| 1665 | |
| 1666 jlong os::elapsed_frequency() { | |
| 1667 return hrtime_hz; | |
| 1668 } | |
| 1669 | |
| 1670 // Return the real, user, and system times in seconds from an | |
| 1671 // arbitrary fixed point in the past. | |
| 1672 bool os::getTimesSecs(double* process_real_time, | |
| 1673 double* process_user_time, | |
| 1674 double* process_system_time) { | |
| 1675 struct tms ticks; | |
| 1676 clock_t real_ticks = times(&ticks); | |
| 1677 | |
| 1678 if (real_ticks == (clock_t) (-1)) { | |
| 1679 return false; | |
| 1680 } else { | |
| 1681 double ticks_per_second = (double) clock_tics_per_sec; | |
| 1682 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
| 1683 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
| 1684 // For consistency return the real time from getTimeNanos() | |
| 1685 // converted to seconds. | |
| 1686 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); | |
| 1687 | |
| 1688 return true; | |
| 1689 } | |
| 1690 } | |
| 1691 | |
|
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1692 bool os::supports_vtime() { return true; } |
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1693 |
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1694 bool os::enable_vtime() { |
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1695 int fd = open("/proc/self/ctl", O_WRONLY); |
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1696 if (fd == -1) |
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1697 return false; |
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1698 |
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1699 long cmd[] = { PCSET, PR_MSACCT }; |
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1700 int res = write(fd, cmd, sizeof(long) * 2); |
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1701 close(fd); |
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1702 if (res != sizeof(long) * 2) |
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1703 return false; |
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1704 |
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1705 return true; |
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1706 } |
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1707 |
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1708 bool os::vtime_enabled() { |
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1709 int fd = open("/proc/self/status", O_RDONLY); |
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1710 if (fd == -1) |
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1711 return false; |
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1712 |
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1713 pstatus_t status; |
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1714 int res = read(fd, (void*) &status, sizeof(pstatus_t)); |
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1715 close(fd); |
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1716 if (res != sizeof(pstatus_t)) |
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1717 return false; |
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1718 |
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1719 return status.pr_flags & PR_MSACCT; |
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1720 } |
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1721 |
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1722 double os::elapsedVTime() { |
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1723 return (double)gethrvtime() / (double)hrtime_hz; |
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1724 } |
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1725 |
| 0 | 1726 // Used internally for comparisons only |
| 1727 // getTimeMillis guaranteed to not move backwards on Solaris | |
| 1728 jlong getTimeMillis() { | |
| 1729 jlong nanotime = getTimeNanos(); | |
| 1730 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); | |
| 1731 } | |
| 1732 | |
| 61 | 1733 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis |
| 1734 jlong os::javaTimeMillis() { | |
| 0 | 1735 timeval t; |
| 1736 if (gettimeofday( &t, NULL) == -1) | |
| 61 | 1737 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); |
| 0 | 1738 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; |
| 1739 } | |
| 1740 | |
| 1741 jlong os::javaTimeNanos() { | |
| 1742 return (jlong)getTimeNanos(); | |
| 1743 } | |
| 1744 | |
| 1745 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
| 1746 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits | |
| 1747 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
| 1748 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
| 1749 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
| 1750 } | |
| 1751 | |
| 1752 char * os::local_time_string(char *buf, size_t buflen) { | |
| 1753 struct tm t; | |
| 1754 time_t long_time; | |
| 1755 time(&long_time); | |
| 1756 localtime_r(&long_time, &t); | |
| 1757 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
| 1758 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
| 1759 t.tm_hour, t.tm_min, t.tm_sec); | |
| 1760 return buf; | |
| 1761 } | |
| 1762 | |
| 1763 // Note: os::shutdown() might be called very early during initialization, or | |
| 1764 // called from signal handler. Before adding something to os::shutdown(), make | |
| 1765 // sure it is async-safe and can handle partially initialized VM. | |
| 1766 void os::shutdown() { | |
| 1767 | |
| 1768 // allow PerfMemory to attempt cleanup of any persistent resources | |
| 1769 perfMemory_exit(); | |
| 1770 | |
| 1771 // needs to remove object in file system | |
| 1772 AttachListener::abort(); | |
| 1773 | |
| 1774 // flush buffered output, finish log files | |
| 1775 ostream_abort(); | |
| 1776 | |
| 1777 // Check for abort hook | |
| 1778 abort_hook_t abort_hook = Arguments::abort_hook(); | |
| 1779 if (abort_hook != NULL) { | |
| 1780 abort_hook(); | |
| 1781 } | |
| 1782 } | |
| 1783 | |
| 1784 // Note: os::abort() might be called very early during initialization, or | |
| 1785 // called from signal handler. Before adding something to os::abort(), make | |
| 1786 // sure it is async-safe and can handle partially initialized VM. | |
| 1787 void os::abort(bool dump_core) { | |
| 1788 os::shutdown(); | |
| 1789 if (dump_core) { | |
| 1790 #ifndef PRODUCT | |
| 1791 fdStream out(defaultStream::output_fd()); | |
| 1792 out.print_raw("Current thread is "); | |
| 1793 char buf[16]; | |
| 1794 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
| 1795 out.print_raw_cr(buf); | |
| 1796 out.print_raw_cr("Dumping core ..."); | |
| 1797 #endif | |
| 1798 ::abort(); // dump core (for debugging) | |
| 1799 } | |
| 1800 | |
| 1801 ::exit(1); | |
| 1802 } | |
| 1803 | |
| 1804 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 1805 void os::die() { | |
| 1806 _exit(-1); | |
| 1807 } | |
| 1808 | |
| 1809 // unused | |
| 1810 void os::set_error_file(const char *logfile) {} | |
| 1811 | |
| 1812 // DLL functions | |
| 1813 | |
| 1814 const char* os::dll_file_extension() { return ".so"; } | |
| 1815 | |
| 1816 const char* os::get_temp_directory() { return "/tmp/"; } | |
| 1817 | |
| 242 | 1818 void os::dll_build_name( |
| 1819 char* buffer, size_t buflen, const char* pname, const char* fname) { | |
| 1820 // copied from libhpi | |
| 1821 const size_t pnamelen = pname ? strlen(pname) : 0; | |
| 1822 | |
| 1823 /* Quietly truncate on buffer overflow. Should be an error. */ | |
| 1824 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { | |
| 1825 *buffer = '\0'; | |
| 1826 return; | |
| 1827 } | |
| 1828 | |
| 1829 if (pnamelen == 0) { | |
| 1830 sprintf(buffer, "lib%s.so", fname); | |
| 1831 } else { | |
| 1832 sprintf(buffer, "%s/lib%s.so", pname, fname); | |
| 1833 } | |
| 1834 } | |
| 1835 | |
| 0 | 1836 const char* os::get_current_directory(char *buf, int buflen) { |
| 1837 return getcwd(buf, buflen); | |
| 1838 } | |
| 1839 | |
| 1840 // check if addr is inside libjvm[_g].so | |
| 1841 bool os::address_is_in_vm(address addr) { | |
| 1842 static address libjvm_base_addr; | |
| 1843 Dl_info dlinfo; | |
| 1844 | |
| 1845 if (libjvm_base_addr == NULL) { | |
| 1846 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); | |
| 1847 libjvm_base_addr = (address)dlinfo.dli_fbase; | |
| 1848 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); | |
| 1849 } | |
| 1850 | |
| 1851 if (dladdr((void *)addr, &dlinfo)) { | |
| 1852 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; | |
| 1853 } | |
| 1854 | |
| 1855 return false; | |
| 1856 } | |
| 1857 | |
| 1858 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); | |
| 1859 static dladdr1_func_type dladdr1_func = NULL; | |
| 1860 | |
| 1861 bool os::dll_address_to_function_name(address addr, char *buf, | |
| 1862 int buflen, int * offset) { | |
| 1863 Dl_info dlinfo; | |
| 1864 | |
| 1865 // dladdr1_func was initialized in os::init() | |
| 1866 if (dladdr1_func){ | |
| 1867 // yes, we have dladdr1 | |
| 1868 | |
| 1869 // Support for dladdr1 is checked at runtime; it may be | |
| 1870 // available even if the vm is built on a machine that does | |
| 1871 // not have dladdr1 support. Make sure there is a value for | |
| 1872 // RTLD_DL_SYMENT. | |
| 1873 #ifndef RTLD_DL_SYMENT | |
| 1874 #define RTLD_DL_SYMENT 1 | |
| 1875 #endif | |
| 1876 Sym * info; | |
| 1877 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, | |
| 1878 RTLD_DL_SYMENT)) { | |
| 1879 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); | |
| 1880 if (offset) *offset = addr - (address)dlinfo.dli_saddr; | |
| 1881 | |
| 1882 // check if the returned symbol really covers addr | |
| 1883 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); | |
| 1884 } else { | |
| 1885 if (buf) buf[0] = '\0'; | |
| 1886 if (offset) *offset = -1; | |
| 1887 return false; | |
| 1888 } | |
| 1889 } else { | |
| 1890 // no, only dladdr is available | |
| 1891 if(dladdr((void *)addr, &dlinfo)) { | |
| 1892 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); | |
| 1893 if (offset) *offset = addr - (address)dlinfo.dli_saddr; | |
| 1894 return true; | |
| 1895 } else { | |
| 1896 if (buf) buf[0] = '\0'; | |
| 1897 if (offset) *offset = -1; | |
| 1898 return false; | |
| 1899 } | |
| 1900 } | |
| 1901 } | |
| 1902 | |
| 1903 bool os::dll_address_to_library_name(address addr, char* buf, | |
| 1904 int buflen, int* offset) { | |
| 1905 Dl_info dlinfo; | |
| 1906 | |
| 1907 if (dladdr((void*)addr, &dlinfo)){ | |
| 1908 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); | |
| 1909 if (offset) *offset = addr - (address)dlinfo.dli_fbase; | |
| 1910 return true; | |
| 1911 } else { | |
| 1912 if (buf) buf[0] = '\0'; | |
| 1913 if (offset) *offset = -1; | |
| 1914 return false; | |
| 1915 } | |
| 1916 } | |
| 1917 | |
| 1918 // Prints the names and full paths of all opened dynamic libraries | |
| 1919 // for current process | |
| 1920 void os::print_dll_info(outputStream * st) { | |
| 1921 Dl_info dli; | |
| 1922 void *handle; | |
| 1923 Link_map *map; | |
| 1924 Link_map *p; | |
| 1925 | |
| 1926 st->print_cr("Dynamic libraries:"); st->flush(); | |
| 1927 | |
| 1928 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { | |
| 1929 st->print_cr("Error: Cannot print dynamic libraries."); | |
| 1930 return; | |
| 1931 } | |
| 1932 handle = dlopen(dli.dli_fname, RTLD_LAZY); | |
| 1933 if (handle == NULL) { | |
| 1934 st->print_cr("Error: Cannot print dynamic libraries."); | |
| 1935 return; | |
| 1936 } | |
| 1937 dlinfo(handle, RTLD_DI_LINKMAP, &map); | |
| 1938 if (map == NULL) { | |
| 1939 st->print_cr("Error: Cannot print dynamic libraries."); | |
| 1940 return; | |
| 1941 } | |
| 1942 | |
| 1943 while (map->l_prev != NULL) | |
| 1944 map = map->l_prev; | |
| 1945 | |
| 1946 while (map != NULL) { | |
| 1947 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); | |
| 1948 map = map->l_next; | |
| 1949 } | |
| 1950 | |
| 1951 dlclose(handle); | |
| 1952 } | |
| 1953 | |
| 1954 // Loads .dll/.so and | |
| 1955 // in case of error it checks if .dll/.so was built for the | |
| 1956 // same architecture as Hotspot is running on | |
| 1957 | |
| 1958 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) | |
| 1959 { | |
| 1960 void * result= ::dlopen(filename, RTLD_LAZY); | |
| 1961 if (result != NULL) { | |
| 1962 // Successful loading | |
| 1963 return result; | |
| 1964 } | |
| 1965 | |
| 1966 Elf32_Ehdr elf_head; | |
| 1967 | |
| 1968 // Read system error message into ebuf | |
| 1969 // It may or may not be overwritten below | |
| 1970 ::strncpy(ebuf, ::dlerror(), ebuflen-1); | |
| 1971 ebuf[ebuflen-1]='\0'; | |
| 1972 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
| 1973 char* diag_msg_buf=ebuf+strlen(ebuf); | |
| 1974 | |
| 1975 if (diag_msg_max_length==0) { | |
| 1976 // No more space in ebuf for additional diagnostics message | |
| 1977 return NULL; | |
| 1978 } | |
| 1979 | |
| 1980 | |
| 1981 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
| 1982 | |
| 1983 if (file_descriptor < 0) { | |
| 1984 // Can't open library, report dlerror() message | |
| 1985 return NULL; | |
| 1986 } | |
| 1987 | |
| 1988 bool failed_to_read_elf_head= | |
| 1989 (sizeof(elf_head)!= | |
| 1990 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
| 1991 | |
| 1992 ::close(file_descriptor); | |
| 1993 if (failed_to_read_elf_head) { | |
| 1994 // file i/o error - report dlerror() msg | |
| 1995 return NULL; | |
| 1996 } | |
| 1997 | |
| 1998 typedef struct { | |
| 1999 Elf32_Half code; // Actual value as defined in elf.h | |
| 2000 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
| 2001 char elf_class; // 32 or 64 bit | |
| 2002 char endianess; // MSB or LSB | |
| 2003 char* name; // String representation | |
| 2004 } arch_t; | |
| 2005 | |
| 2006 static const arch_t arch_array[]={ | |
| 2007 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 2008 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 2009 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
| 2010 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
| 2011 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 2012 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 2013 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
| 2014 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
| 2015 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} | |
| 2016 }; | |
| 2017 | |
| 2018 #if (defined IA32) | |
| 2019 static Elf32_Half running_arch_code=EM_386; | |
| 2020 #elif (defined AMD64) | |
| 2021 static Elf32_Half running_arch_code=EM_X86_64; | |
| 2022 #elif (defined IA64) | |
| 2023 static Elf32_Half running_arch_code=EM_IA_64; | |
| 2024 #elif (defined __sparc) && (defined _LP64) | |
| 2025 static Elf32_Half running_arch_code=EM_SPARCV9; | |
| 2026 #elif (defined __sparc) && (!defined _LP64) | |
| 2027 static Elf32_Half running_arch_code=EM_SPARC; | |
| 2028 #elif (defined __powerpc64__) | |
| 2029 static Elf32_Half running_arch_code=EM_PPC64; | |
| 2030 #elif (defined __powerpc__) | |
| 2031 static Elf32_Half running_arch_code=EM_PPC; | |
| 2032 #else | |
| 2033 #error Method os::dll_load requires that one of following is defined:\ | |
| 2034 IA32, AMD64, IA64, __sparc, __powerpc__ | |
| 2035 #endif | |
| 2036 | |
| 2037 // Identify compatability class for VM's architecture and library's architecture | |
| 2038 // Obtain string descriptions for architectures | |
| 2039 | |
| 2040 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
| 2041 int running_arch_index=-1; | |
| 2042 | |
| 2043 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
| 2044 if (running_arch_code == arch_array[i].code) { | |
| 2045 running_arch_index = i; | |
| 2046 } | |
| 2047 if (lib_arch.code == arch_array[i].code) { | |
| 2048 lib_arch.compat_class = arch_array[i].compat_class; | |
| 2049 lib_arch.name = arch_array[i].name; | |
| 2050 } | |
| 2051 } | |
| 2052 | |
| 2053 assert(running_arch_index != -1, | |
| 2054 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
| 2055 if (running_arch_index == -1) { | |
| 2056 // Even though running architecture detection failed | |
| 2057 // we may still continue with reporting dlerror() message | |
| 2058 return NULL; | |
| 2059 } | |
| 2060 | |
| 2061 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
| 2062 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
| 2063 return NULL; | |
| 2064 } | |
| 2065 | |
| 2066 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { | |
| 2067 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
| 2068 return NULL; | |
| 2069 } | |
| 2070 | |
| 2071 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
| 2072 if ( lib_arch.name!=NULL ) { | |
| 2073 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2074 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
| 2075 lib_arch.name, arch_array[running_arch_index].name); | |
| 2076 } else { | |
| 2077 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2078 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
| 2079 lib_arch.code, | |
| 2080 arch_array[running_arch_index].name); | |
| 2081 } | |
| 2082 } | |
| 2083 | |
| 2084 return NULL; | |
| 2085 } | |
| 2086 | |
| 242 | 2087 void* os::dll_lookup(void* handle, const char* name) { |
| 2088 return dlsym(handle, name); | |
| 2089 } | |
| 0 | 2090 |
| 2091 | |
| 2092 bool _print_ascii_file(const char* filename, outputStream* st) { | |
| 2093 int fd = open(filename, O_RDONLY); | |
| 2094 if (fd == -1) { | |
| 2095 return false; | |
| 2096 } | |
| 2097 | |
| 2098 char buf[32]; | |
| 2099 int bytes; | |
| 2100 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { | |
| 2101 st->print_raw(buf, bytes); | |
| 2102 } | |
| 2103 | |
| 2104 close(fd); | |
| 2105 | |
| 2106 return true; | |
| 2107 } | |
| 2108 | |
| 2109 void os::print_os_info(outputStream* st) { | |
| 2110 st->print("OS:"); | |
| 2111 | |
| 2112 if (!_print_ascii_file("/etc/release", st)) { | |
| 2113 st->print("Solaris"); | |
| 2114 } | |
| 2115 st->cr(); | |
| 2116 | |
| 2117 // kernel | |
| 2118 st->print("uname:"); | |
| 2119 struct utsname name; | |
| 2120 uname(&name); | |
| 2121 st->print(name.sysname); st->print(" "); | |
| 2122 st->print(name.release); st->print(" "); | |
| 2123 st->print(name.version); st->print(" "); | |
| 2124 st->print(name.machine); | |
| 2125 | |
| 2126 // libthread | |
| 2127 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); | |
| 2128 else st->print(" (T1 libthread)"); | |
| 2129 st->cr(); | |
| 2130 | |
| 2131 // rlimit | |
| 2132 st->print("rlimit:"); | |
| 2133 struct rlimit rlim; | |
| 2134 | |
| 2135 st->print(" STACK "); | |
| 2136 getrlimit(RLIMIT_STACK, &rlim); | |
| 2137 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2138 else st->print("%uk", rlim.rlim_cur >> 10); | |
| 2139 | |
| 2140 st->print(", CORE "); | |
| 2141 getrlimit(RLIMIT_CORE, &rlim); | |
| 2142 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2143 else st->print("%uk", rlim.rlim_cur >> 10); | |
| 2144 | |
| 2145 st->print(", NOFILE "); | |
| 2146 getrlimit(RLIMIT_NOFILE, &rlim); | |
| 2147 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2148 else st->print("%d", rlim.rlim_cur); | |
| 2149 | |
| 2150 st->print(", AS "); | |
| 2151 getrlimit(RLIMIT_AS, &rlim); | |
| 2152 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
| 2153 else st->print("%uk", rlim.rlim_cur >> 10); | |
| 2154 st->cr(); | |
| 2155 | |
| 2156 // load average | |
| 2157 st->print("load average:"); | |
| 2158 double loadavg[3]; | |
| 2159 os::loadavg(loadavg, 3); | |
| 2160 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); | |
| 2161 st->cr(); | |
| 2162 } | |
| 2163 | |
| 2164 | |
| 2165 static bool check_addr0(outputStream* st) { | |
| 2166 jboolean status = false; | |
| 2167 int fd = open("/proc/self/map",O_RDONLY); | |
| 2168 if (fd >= 0) { | |
| 2169 prmap_t p; | |
| 2170 while(read(fd, &p, sizeof(p)) > 0) { | |
| 2171 if (p.pr_vaddr == 0x0) { | |
| 2172 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); | |
| 2173 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); | |
| 2174 st->print("Access:"); | |
| 2175 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); | |
| 2176 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); | |
| 2177 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); | |
| 2178 st->cr(); | |
| 2179 status = true; | |
| 2180 } | |
| 2181 close(fd); | |
| 2182 } | |
| 2183 } | |
| 2184 return status; | |
| 2185 } | |
| 2186 | |
| 2187 void os::print_memory_info(outputStream* st) { | |
| 2188 st->print("Memory:"); | |
| 2189 st->print(" %dk page", os::vm_page_size()>>10); | |
| 2190 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); | |
| 2191 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); | |
| 2192 st->cr(); | |
| 2193 (void) check_addr0(st); | |
| 2194 } | |
| 2195 | |
| 2196 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific | |
| 2197 // but they're the same for all the solaris architectures that we support. | |
| 2198 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", | |
| 2199 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", | |
| 2200 "ILL_COPROC", "ILL_BADSTK" }; | |
| 2201 | |
| 2202 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", | |
| 2203 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", | |
| 2204 "FPE_FLTINV", "FPE_FLTSUB" }; | |
| 2205 | |
| 2206 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; | |
| 2207 | |
| 2208 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; | |
| 2209 | |
| 2210 void os::print_siginfo(outputStream* st, void* siginfo) { | |
| 2211 st->print("siginfo:"); | |
| 2212 | |
| 2213 const int buflen = 100; | |
| 2214 char buf[buflen]; | |
| 2215 siginfo_t *si = (siginfo_t*)siginfo; | |
| 2216 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); | |
| 2217 char *err = strerror(si->si_errno); | |
| 2218 if (si->si_errno != 0 && err != NULL) { | |
| 2219 st->print("si_errno=%s", err); | |
| 2220 } else { | |
| 2221 st->print("si_errno=%d", si->si_errno); | |
| 2222 } | |
| 2223 const int c = si->si_code; | |
| 2224 assert(c > 0, "unexpected si_code"); | |
| 2225 switch (si->si_signo) { | |
| 2226 case SIGILL: | |
| 2227 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); | |
| 2228 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2229 break; | |
| 2230 case SIGFPE: | |
| 2231 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); | |
| 2232 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2233 break; | |
| 2234 case SIGSEGV: | |
| 2235 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); | |
| 2236 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2237 break; | |
| 2238 case SIGBUS: | |
| 2239 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); | |
| 2240 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2241 break; | |
| 2242 default: | |
| 2243 st->print(", si_code=%d", si->si_code); | |
| 2244 // no si_addr | |
| 2245 } | |
| 2246 | |
| 2247 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && | |
| 2248 UseSharedSpaces) { | |
| 2249 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
| 2250 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
| 2251 st->print("\n\nError accessing class data sharing archive." \ | |
| 2252 " Mapped file inaccessible during execution, " \ | |
| 2253 " possible disk/network problem."); | |
| 2254 } | |
| 2255 } | |
| 2256 st->cr(); | |
| 2257 } | |
| 2258 | |
| 2259 // Moved from whole group, because we need them here for diagnostic | |
| 2260 // prints. | |
| 2261 #define OLDMAXSIGNUM 32 | |
| 2262 static int Maxsignum = 0; | |
| 2263 static int *ourSigFlags = NULL; | |
| 2264 | |
| 2265 extern "C" void sigINTRHandler(int, siginfo_t*, void*); | |
| 2266 | |
| 2267 int os::Solaris::get_our_sigflags(int sig) { | |
| 2268 assert(ourSigFlags!=NULL, "signal data structure not initialized"); | |
| 2269 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); | |
| 2270 return ourSigFlags[sig]; | |
| 2271 } | |
| 2272 | |
| 2273 void os::Solaris::set_our_sigflags(int sig, int flags) { | |
| 2274 assert(ourSigFlags!=NULL, "signal data structure not initialized"); | |
| 2275 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); | |
| 2276 ourSigFlags[sig] = flags; | |
| 2277 } | |
| 2278 | |
| 2279 | |
| 2280 static const char* get_signal_handler_name(address handler, | |
| 2281 char* buf, int buflen) { | |
| 2282 int offset; | |
| 2283 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); | |
| 2284 if (found) { | |
| 2285 // skip directory names | |
| 2286 const char *p1, *p2; | |
| 2287 p1 = buf; | |
| 2288 size_t len = strlen(os::file_separator()); | |
| 2289 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
| 2290 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
| 2291 } else { | |
| 2292 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
| 2293 } | |
| 2294 return buf; | |
| 2295 } | |
| 2296 | |
| 2297 static void print_signal_handler(outputStream* st, int sig, | |
| 2298 char* buf, size_t buflen) { | |
| 2299 struct sigaction sa; | |
| 2300 | |
| 2301 sigaction(sig, NULL, &sa); | |
| 2302 | |
| 2303 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
| 2304 | |
| 2305 address handler = (sa.sa_flags & SA_SIGINFO) | |
| 2306 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
| 2307 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
| 2308 | |
| 2309 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
| 2310 st->print("SIG_DFL"); | |
| 2311 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
| 2312 st->print("SIG_IGN"); | |
| 2313 } else { | |
| 2314 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
| 2315 } | |
| 2316 | |
| 2317 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); | |
| 2318 | |
| 2319 address rh = VMError::get_resetted_sighandler(sig); | |
| 2320 // May be, handler was resetted by VMError? | |
| 2321 if(rh != NULL) { | |
| 2322 handler = rh; | |
| 2323 sa.sa_flags = VMError::get_resetted_sigflags(sig); | |
| 2324 } | |
| 2325 | |
| 2326 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); | |
| 2327 | |
| 2328 // Check: is it our handler? | |
| 2329 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || | |
| 2330 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { | |
| 2331 // It is our signal handler | |
| 2332 // check for flags | |
| 2333 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { | |
| 2334 st->print( | |
| 2335 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
| 2336 os::Solaris::get_our_sigflags(sig)); | |
| 2337 } | |
| 2338 } | |
| 2339 st->cr(); | |
| 2340 } | |
| 2341 | |
| 2342 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
| 2343 st->print_cr("Signal Handlers:"); | |
| 2344 print_signal_handler(st, SIGSEGV, buf, buflen); | |
| 2345 print_signal_handler(st, SIGBUS , buf, buflen); | |
| 2346 print_signal_handler(st, SIGFPE , buf, buflen); | |
| 2347 print_signal_handler(st, SIGPIPE, buf, buflen); | |
| 2348 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
| 2349 print_signal_handler(st, SIGILL , buf, buflen); | |
| 2350 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
| 2351 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); | |
| 2352 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
| 2353 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); | |
| 2354 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
| 2355 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); | |
| 2356 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); | |
| 2357 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); | |
| 2358 } | |
| 2359 | |
| 2360 static char saved_jvm_path[MAXPATHLEN] = { 0 }; | |
| 2361 | |
| 2362 // Find the full path to the current module, libjvm.so or libjvm_g.so | |
| 2363 void os::jvm_path(char *buf, jint buflen) { | |
| 2364 // Error checking. | |
| 2365 if (buflen < MAXPATHLEN) { | |
| 2366 assert(false, "must use a large-enough buffer"); | |
| 2367 buf[0] = '\0'; | |
| 2368 return; | |
| 2369 } | |
| 2370 // Lazy resolve the path to current module. | |
| 2371 if (saved_jvm_path[0] != 0) { | |
| 2372 strcpy(buf, saved_jvm_path); | |
| 2373 return; | |
| 2374 } | |
| 2375 | |
| 2376 Dl_info dlinfo; | |
| 2377 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); | |
| 2378 assert(ret != 0, "cannot locate libjvm"); | |
| 2379 realpath((char *)dlinfo.dli_fname, buf); | |
| 2380 | |
| 2381 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { | |
| 2382 // Support for the gamma launcher. Typical value for buf is | |
| 2383 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
| 2384 // the right place in the string, then assume we are installed in a JDK and | |
| 2385 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
| 2386 // up the path so it looks like libjvm.so is installed there (append a | |
| 2387 // fake suffix hotspot/libjvm.so). | |
| 2388 const char *p = buf + strlen(buf) - 1; | |
| 2389 for (int count = 0; p > buf && count < 5; ++count) { | |
| 2390 for (--p; p > buf && *p != '/'; --p) | |
| 2391 /* empty */ ; | |
| 2392 } | |
| 2393 | |
| 2394 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
| 2395 // Look for JAVA_HOME in the environment. | |
| 2396 char* java_home_var = ::getenv("JAVA_HOME"); | |
| 2397 if (java_home_var != NULL && java_home_var[0] != 0) { | |
| 2398 char cpu_arch[12]; | |
| 2399 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); | |
| 2400 #ifdef _LP64 | |
| 2401 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. | |
| 2402 if (strcmp(cpu_arch, "sparc") == 0) { | |
| 2403 strcat(cpu_arch, "v9"); | |
| 2404 } else if (strcmp(cpu_arch, "i386") == 0) { | |
| 2405 strcpy(cpu_arch, "amd64"); | |
| 2406 } | |
| 2407 #endif | |
| 2408 // Check the current module name "libjvm.so" or "libjvm_g.so". | |
| 2409 p = strrchr(buf, '/'); | |
| 2410 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
| 2411 p = strstr(p, "_g") ? "_g" : ""; | |
| 2412 | |
| 2413 realpath(java_home_var, buf); | |
| 2414 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); | |
| 2415 if (0 == access(buf, F_OK)) { | |
| 2416 // Use current module name "libjvm[_g].so" instead of | |
| 2417 // "libjvm"debug_only("_g")".so" since for fastdebug version | |
| 2418 // we should have "libjvm.so" but debug_only("_g") adds "_g"! | |
| 2419 // It is used when we are choosing the HPI library's name | |
| 2420 // "libhpi[_g].so" in hpi::initialize_get_interface(). | |
| 2421 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); | |
| 2422 } else { | |
| 2423 // Go back to path of .so | |
| 2424 realpath((char *)dlinfo.dli_fname, buf); | |
| 2425 } | |
| 2426 } | |
| 2427 } | |
| 2428 } | |
| 2429 | |
| 2430 strcpy(saved_jvm_path, buf); | |
| 2431 } | |
| 2432 | |
| 2433 | |
| 2434 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
| 2435 // no prefix required, not even "_" | |
| 2436 } | |
| 2437 | |
| 2438 | |
| 2439 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
| 2440 // no suffix required | |
| 2441 } | |
| 2442 | |
| 2443 | |
| 2444 // sun.misc.Signal | |
| 2445 | |
| 2446 extern "C" { | |
| 2447 static void UserHandler(int sig, void *siginfo, void *context) { | |
| 2448 // Ctrl-C is pressed during error reporting, likely because the error | |
| 2449 // handler fails to abort. Let VM die immediately. | |
| 2450 if (sig == SIGINT && is_error_reported()) { | |
| 2451 os::die(); | |
| 2452 } | |
| 2453 | |
| 2454 os::signal_notify(sig); | |
| 2455 // We do not need to reinstate the signal handler each time... | |
| 2456 } | |
| 2457 } | |
| 2458 | |
| 2459 void* os::user_handler() { | |
| 2460 return CAST_FROM_FN_PTR(void*, UserHandler); | |
| 2461 } | |
| 2462 | |
| 2463 extern "C" { | |
| 2464 typedef void (*sa_handler_t)(int); | |
| 2465 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
| 2466 } | |
| 2467 | |
| 2468 void* os::signal(int signal_number, void* handler) { | |
| 2469 struct sigaction sigAct, oldSigAct; | |
| 2470 sigfillset(&(sigAct.sa_mask)); | |
| 2471 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; | |
| 2472 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
| 2473 | |
| 2474 if (sigaction(signal_number, &sigAct, &oldSigAct)) | |
| 2475 // -1 means registration failed | |
| 2476 return (void *)-1; | |
| 2477 | |
| 2478 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
| 2479 } | |
| 2480 | |
| 2481 void os::signal_raise(int signal_number) { | |
| 2482 raise(signal_number); | |
| 2483 } | |
| 2484 | |
| 2485 /* | |
| 2486 * The following code is moved from os.cpp for making this | |
| 2487 * code platform specific, which it is by its very nature. | |
| 2488 */ | |
| 2489 | |
| 2490 // a counter for each possible signal value | |
| 2491 static int Sigexit = 0; | |
| 2492 static int Maxlibjsigsigs; | |
| 2493 static jint *pending_signals = NULL; | |
| 2494 static int *preinstalled_sigs = NULL; | |
| 2495 static struct sigaction *chainedsigactions = NULL; | |
| 2496 static sema_t sig_sem; | |
| 2497 typedef int (*version_getting_t)(); | |
| 2498 version_getting_t os::Solaris::get_libjsig_version = NULL; | |
| 2499 static int libjsigversion = NULL; | |
| 2500 | |
| 2501 int os::sigexitnum_pd() { | |
| 2502 assert(Sigexit > 0, "signal memory not yet initialized"); | |
| 2503 return Sigexit; | |
| 2504 } | |
| 2505 | |
| 2506 void os::Solaris::init_signal_mem() { | |
| 2507 // Initialize signal structures | |
| 2508 Maxsignum = SIGRTMAX; | |
| 2509 Sigexit = Maxsignum+1; | |
| 2510 assert(Maxsignum >0, "Unable to obtain max signal number"); | |
| 2511 | |
| 2512 Maxlibjsigsigs = Maxsignum; | |
| 2513 | |
| 2514 // pending_signals has one int per signal | |
| 2515 // The additional signal is for SIGEXIT - exit signal to signal_thread | |
| 2516 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); | |
| 2517 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); | |
| 2518 | |
| 2519 if (UseSignalChaining) { | |
| 2520 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) | |
| 2521 * (Maxsignum + 1)); | |
| 2522 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); | |
| 2523 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); | |
| 2524 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); | |
| 2525 } | |
| 2526 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); | |
| 2527 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); | |
| 2528 } | |
| 2529 | |
| 2530 void os::signal_init_pd() { | |
| 2531 int ret; | |
| 2532 | |
| 2533 ret = ::sema_init(&sig_sem, 0, NULL, NULL); | |
| 2534 assert(ret == 0, "sema_init() failed"); | |
| 2535 } | |
| 2536 | |
| 2537 void os::signal_notify(int signal_number) { | |
| 2538 int ret; | |
| 2539 | |
| 2540 Atomic::inc(&pending_signals[signal_number]); | |
| 2541 ret = ::sema_post(&sig_sem); | |
| 2542 assert(ret == 0, "sema_post() failed"); | |
| 2543 } | |
| 2544 | |
| 2545 static int check_pending_signals(bool wait_for_signal) { | |
| 2546 int ret; | |
| 2547 while (true) { | |
| 2548 for (int i = 0; i < Sigexit + 1; i++) { | |
| 2549 jint n = pending_signals[i]; | |
| 2550 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
| 2551 return i; | |
| 2552 } | |
| 2553 } | |
| 2554 if (!wait_for_signal) { | |
| 2555 return -1; | |
| 2556 } | |
| 2557 JavaThread *thread = JavaThread::current(); | |
| 2558 ThreadBlockInVM tbivm(thread); | |
| 2559 | |
| 2560 bool threadIsSuspended; | |
| 2561 do { | |
| 2562 thread->set_suspend_equivalent(); | |
| 2563 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 2564 while((ret = ::sema_wait(&sig_sem)) == EINTR) | |
| 2565 ; | |
| 2566 assert(ret == 0, "sema_wait() failed"); | |
| 2567 | |
| 2568 // were we externally suspended while we were waiting? | |
| 2569 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
| 2570 if (threadIsSuspended) { | |
| 2571 // | |
| 2572 // The semaphore has been incremented, but while we were waiting | |
| 2573 // another thread suspended us. We don't want to continue running | |
| 2574 // while suspended because that would surprise the thread that | |
| 2575 // suspended us. | |
| 2576 // | |
| 2577 ret = ::sema_post(&sig_sem); | |
| 2578 assert(ret == 0, "sema_post() failed"); | |
| 2579 | |
| 2580 thread->java_suspend_self(); | |
| 2581 } | |
| 2582 } while (threadIsSuspended); | |
| 2583 } | |
| 2584 } | |
| 2585 | |
| 2586 int os::signal_lookup() { | |
| 2587 return check_pending_signals(false); | |
| 2588 } | |
| 2589 | |
| 2590 int os::signal_wait() { | |
| 2591 return check_pending_signals(true); | |
| 2592 } | |
| 2593 | |
| 2594 //////////////////////////////////////////////////////////////////////////////// | |
| 2595 // Virtual Memory | |
| 2596 | |
| 2597 static int page_size = -1; | |
| 2598 | |
| 2599 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will | |
| 2600 // clear this var if support is not available. | |
| 2601 static bool has_map_align = true; | |
| 2602 | |
| 2603 int os::vm_page_size() { | |
| 2604 assert(page_size != -1, "must call os::init"); | |
| 2605 return page_size; | |
| 2606 } | |
| 2607 | |
| 2608 // Solaris allocates memory by pages. | |
| 2609 int os::vm_allocation_granularity() { | |
| 2610 assert(page_size != -1, "must call os::init"); | |
| 2611 return page_size; | |
| 2612 } | |
| 2613 | |
| 2614 bool os::commit_memory(char* addr, size_t bytes) { | |
| 2615 size_t size = bytes; | |
| 2616 return | |
| 2617 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, | |
| 2618 PROT_READ | PROT_WRITE | PROT_EXEC); | |
| 2619 } | |
| 2620 | |
| 2621 bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { | |
| 2622 if (commit_memory(addr, bytes)) { | |
| 2623 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { | |
| 2624 // If the large page size has been set and the VM | |
| 2625 // is using large pages, use the large page size | |
| 2626 // if it is smaller than the alignment hint. This is | |
| 2627 // a case where the VM wants to use a larger alignment size | |
| 2628 // for its own reasons but still want to use large pages | |
| 2629 // (which is what matters to setting the mpss range. | |
| 2630 size_t page_size = 0; | |
| 2631 if (large_page_size() < alignment_hint) { | |
| 2632 assert(UseLargePages, "Expected to be here for large page use only"); | |
| 2633 page_size = large_page_size(); | |
| 2634 } else { | |
| 2635 // If the alignment hint is less than the large page | |
| 2636 // size, the VM wants a particular alignment (thus the hint) | |
| 2637 // for internal reasons. Try to set the mpss range using | |
| 2638 // the alignment_hint. | |
| 2639 page_size = alignment_hint; | |
| 2640 } | |
| 2641 // Since this is a hint, ignore any failures. | |
| 2642 (void)Solaris::set_mpss_range(addr, bytes, page_size); | |
| 2643 } | |
| 2644 return true; | |
| 2645 } | |
| 2646 return false; | |
| 2647 } | |
| 2648 | |
| 2649 // Uncommit the pages in a specified region. | |
| 2650 void os::free_memory(char* addr, size_t bytes) { | |
| 2651 if (madvise(addr, bytes, MADV_FREE) < 0) { | |
| 2652 debug_only(warning("MADV_FREE failed.")); | |
| 2653 return; | |
| 2654 } | |
| 2655 } | |
| 2656 | |
| 2657 // Change the page size in a given range. | |
| 2658 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
| 2659 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); | |
| 2660 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); | |
| 2661 Solaris::set_mpss_range(addr, bytes, alignment_hint); | |
| 2662 } | |
| 2663 | |
| 2664 // Tell the OS to make the range local to the first-touching LWP | |
| 141 | 2665 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
| 0 | 2666 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); |
| 2667 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { | |
| 2668 debug_only(warning("MADV_ACCESS_LWP failed.")); | |
| 2669 } | |
| 2670 } | |
| 2671 | |
| 2672 // Tell the OS that this range would be accessed from different LWPs. | |
| 2673 void os::numa_make_global(char *addr, size_t bytes) { | |
| 2674 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); | |
| 2675 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { | |
| 2676 debug_only(warning("MADV_ACCESS_MANY failed.")); | |
| 2677 } | |
| 2678 } | |
| 2679 | |
| 2680 // Get the number of the locality groups. | |
| 2681 size_t os::numa_get_groups_num() { | |
| 2682 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); | |
| 2683 return n != -1 ? n : 1; | |
| 2684 } | |
| 2685 | |
| 2686 // Get a list of leaf locality groups. A leaf lgroup is group that | |
| 2687 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory | |
| 2688 // board. An LWP is assigned to one of these groups upon creation. | |
| 2689 size_t os::numa_get_leaf_groups(int *ids, size_t size) { | |
| 2690 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { | |
| 2691 ids[0] = 0; | |
| 2692 return 1; | |
| 2693 } | |
| 2694 int result_size = 0, top = 1, bottom = 0, cur = 0; | |
| 2695 for (int k = 0; k < size; k++) { | |
| 2696 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], | |
| 2697 (Solaris::lgrp_id_t*)&ids[top], size - top); | |
| 2698 if (r == -1) { | |
| 2699 ids[0] = 0; | |
| 2700 return 1; | |
| 2701 } | |
| 2702 if (!r) { | |
|
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2703 // That's a leaf node. |
| 0 | 2704 assert (bottom <= cur, "Sanity check"); |
|
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2705 // Check if the node has memory |
|
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2706 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], |
|
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2707 NULL, 0, LGRP_RSRC_MEM) > 0) { |
|
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2708 ids[bottom++] = ids[cur]; |
|
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|
2709 } |
| 0 | 2710 } |
| 2711 top += r; | |
| 2712 cur++; | |
| 2713 } | |
|
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2714 if (bottom == 0) { |
|
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2715 // Handle a situation, when the OS reports no memory available. |
|
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2716 // Assume UMA architecture. |
|
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2717 ids[0] = 0; |
|
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2718 return 1; |
|
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2719 } |
| 0 | 2720 return bottom; |
| 2721 } | |
| 2722 | |
|
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2723 // Detect the topology change. Typically happens during CPU plugging-unplugging. |
| 0 | 2724 bool os::numa_topology_changed() { |
| 2725 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); | |
| 2726 if (is_stale != -1 && is_stale) { | |
| 2727 Solaris::lgrp_fini(Solaris::lgrp_cookie()); | |
| 2728 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); | |
| 2729 assert(c != 0, "Failure to initialize LGRP API"); | |
| 2730 Solaris::set_lgrp_cookie(c); | |
| 2731 return true; | |
| 2732 } | |
| 2733 return false; | |
| 2734 } | |
| 2735 | |
| 2736 // Get the group id of the current LWP. | |
| 2737 int os::numa_get_group_id() { | |
|
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2738 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); |
| 0 | 2739 if (lgrp_id == -1) { |
| 2740 return 0; | |
| 2741 } | |
|
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2742 const int size = os::numa_get_groups_num(); |
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2743 int *ids = (int*)alloca(size * sizeof(int)); |
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2744 |
|
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2745 // Get the ids of all lgroups with memory; r is the count. |
|
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2746 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, |
|
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2747 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); |
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2748 if (r <= 0) { |
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2749 return 0; |
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2750 } |
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2751 return ids[os::random() % r]; |
| 0 | 2752 } |
| 2753 | |
| 2754 // Request information about the page. | |
| 2755 bool os::get_page_info(char *start, page_info* info) { | |
| 2756 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; | |
| 2757 uint64_t addr = (uintptr_t)start; | |
| 2758 uint64_t outdata[2]; | |
| 2759 uint_t validity = 0; | |
| 2760 | |
| 2761 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { | |
| 2762 return false; | |
| 2763 } | |
| 2764 | |
| 2765 info->size = 0; | |
| 2766 info->lgrp_id = -1; | |
| 2767 | |
| 2768 if ((validity & 1) != 0) { | |
| 2769 if ((validity & 2) != 0) { | |
| 2770 info->lgrp_id = outdata[0]; | |
| 2771 } | |
| 2772 if ((validity & 4) != 0) { | |
| 2773 info->size = outdata[1]; | |
| 2774 } | |
| 2775 return true; | |
| 2776 } | |
| 2777 return false; | |
| 2778 } | |
| 2779 | |
| 2780 // Scan the pages from start to end until a page different than | |
| 2781 // the one described in the info parameter is encountered. | |
| 2782 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
| 2783 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; | |
| 2784 const size_t types = sizeof(info_types) / sizeof(info_types[0]); | |
| 2785 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; | |
| 2786 uint_t validity[MAX_MEMINFO_CNT]; | |
| 2787 | |
| 2788 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); | |
| 2789 uint64_t p = (uint64_t)start; | |
| 2790 while (p < (uint64_t)end) { | |
| 2791 addrs[0] = p; | |
| 2792 size_t addrs_count = 1; | |
| 2793 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { | |
| 2794 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; | |
| 2795 addrs_count++; | |
| 2796 } | |
| 2797 | |
| 2798 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { | |
| 2799 return NULL; | |
| 2800 } | |
| 2801 | |
| 2802 size_t i = 0; | |
| 2803 for (; i < addrs_count; i++) { | |
| 2804 if ((validity[i] & 1) != 0) { | |
| 2805 if ((validity[i] & 4) != 0) { | |
| 2806 if (outdata[types * i + 1] != page_expected->size) { | |
| 2807 break; | |
| 2808 } | |
| 2809 } else | |
| 2810 if (page_expected->size != 0) { | |
| 2811 break; | |
| 2812 } | |
| 2813 | |
| 2814 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { | |
| 2815 if (outdata[types * i] != page_expected->lgrp_id) { | |
| 2816 break; | |
| 2817 } | |
| 2818 } | |
| 2819 } else { | |
| 2820 return NULL; | |
| 2821 } | |
| 2822 } | |
| 2823 | |
| 2824 if (i != addrs_count) { | |
| 2825 if ((validity[i] & 2) != 0) { | |
| 2826 page_found->lgrp_id = outdata[types * i]; | |
| 2827 } else { | |
| 2828 page_found->lgrp_id = -1; | |
| 2829 } | |
| 2830 if ((validity[i] & 4) != 0) { | |
| 2831 page_found->size = outdata[types * i + 1]; | |
| 2832 } else { | |
| 2833 page_found->size = 0; | |
| 2834 } | |
| 2835 return (char*)addrs[i]; | |
| 2836 } | |
| 2837 | |
| 2838 p = addrs[addrs_count - 1] + page_size; | |
| 2839 } | |
| 2840 return end; | |
| 2841 } | |
| 2842 | |
| 2843 bool os::uncommit_memory(char* addr, size_t bytes) { | |
| 2844 size_t size = bytes; | |
| 2845 // Map uncommitted pages PROT_NONE so we fail early if we touch an | |
| 2846 // uncommitted page. Otherwise, the read/write might succeed if we | |
| 2847 // have enough swap space to back the physical page. | |
| 2848 return | |
| 2849 NULL != Solaris::mmap_chunk(addr, size, | |
| 2850 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, | |
| 2851 PROT_NONE); | |
| 2852 } | |
| 2853 | |
| 2854 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { | |
| 2855 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); | |
| 2856 | |
| 2857 if (b == MAP_FAILED) { | |
| 2858 return NULL; | |
| 2859 } | |
| 2860 return b; | |
| 2861 } | |
| 2862 | |
|
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2863 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { |
|
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2864 char* addr = requested_addr; |
|
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2865 int flags = MAP_PRIVATE | MAP_NORESERVE; |
|
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2866 |
|
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|
2867 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); |
|
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2868 |
|
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2869 if (fixed) { |
|
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2870 flags |= MAP_FIXED; |
|
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2871 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { |
| 0 | 2872 flags |= MAP_ALIGN; |
| 2873 addr = (char*) alignment_hint; | |
| 2874 } | |
| 2875 | |
| 2876 // Map uncommitted pages PROT_NONE so we fail early if we touch an | |
| 2877 // uncommitted page. Otherwise, the read/write might succeed if we | |
| 2878 // have enough swap space to back the physical page. | |
|
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2879 return mmap_chunk(addr, bytes, flags, PROT_NONE); |
|
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|
2880 } |
|
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|
2881 |
|
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|
2882 char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { |
|
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2883 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); |
| 0 | 2884 |
| 2885 guarantee(requested_addr == NULL || requested_addr == addr, | |
| 2886 "OS failed to return requested mmap address."); | |
| 2887 return addr; | |
| 2888 } | |
| 2889 | |
| 2890 // Reserve memory at an arbitrary address, only if that area is | |
| 2891 // available (and not reserved for something else). | |
| 2892 | |
| 2893 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { | |
| 2894 const int max_tries = 10; | |
| 2895 char* base[max_tries]; | |
| 2896 size_t size[max_tries]; | |
| 2897 | |
| 2898 // Solaris adds a gap between mmap'ed regions. The size of the gap | |
| 2899 // is dependent on the requested size and the MMU. Our initial gap | |
| 2900 // value here is just a guess and will be corrected later. | |
| 2901 bool had_top_overlap = false; | |
| 2902 bool have_adjusted_gap = false; | |
| 2903 size_t gap = 0x400000; | |
| 2904 | |
| 2905 // Assert only that the size is a multiple of the page size, since | |
| 2906 // that's all that mmap requires, and since that's all we really know | |
| 2907 // about at this low abstraction level. If we need higher alignment, | |
| 2908 // we can either pass an alignment to this method or verify alignment | |
| 2909 // in one of the methods further up the call chain. See bug 5044738. | |
| 2910 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
| 2911 | |
|
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2912 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. |
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2913 // Give it a try, if the kernel honors the hint we can return immediately. |
|
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2914 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); |
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2915 volatile int err = errno; |
|
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2916 if (addr == requested_addr) { |
|
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2917 return addr; |
|
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2918 } else if (addr != NULL) { |
|
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2919 unmap_memory(addr, bytes); |
|
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2920 } |
|
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2921 |
|
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2922 if (PrintMiscellaneous && Verbose) { |
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2923 char buf[256]; |
|
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2924 buf[0] = '\0'; |
|
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2925 if (addr == NULL) { |
|
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2926 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); |
|
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2927 } |
|
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2928 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " |
|
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2929 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT |
|
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|
2930 "%s", bytes, requested_addr, addr, buf); |
|
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|
2931 } |
|
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|
2932 |
|
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|
2933 // Address hint method didn't work. Fall back to the old method. |
|
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|
2934 // In theory, once SNV becomes our oldest supported platform, this |
|
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|
2935 // code will no longer be needed. |
|
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|
2936 // |
| 0 | 2937 // Repeatedly allocate blocks until the block is allocated at the |
| 2938 // right spot. Give up after max_tries. | |
| 2939 int i; | |
| 2940 for (i = 0; i < max_tries; ++i) { | |
| 2941 base[i] = reserve_memory(bytes); | |
| 2942 | |
| 2943 if (base[i] != NULL) { | |
| 2944 // Is this the block we wanted? | |
| 2945 if (base[i] == requested_addr) { | |
| 2946 size[i] = bytes; | |
| 2947 break; | |
| 2948 } | |
| 2949 | |
| 2950 // check that the gap value is right | |
| 2951 if (had_top_overlap && !have_adjusted_gap) { | |
| 2952 size_t actual_gap = base[i-1] - base[i] - bytes; | |
| 2953 if (gap != actual_gap) { | |
| 2954 // adjust the gap value and retry the last 2 allocations | |
| 2955 assert(i > 0, "gap adjustment code problem"); | |
| 2956 have_adjusted_gap = true; // adjust the gap only once, just in case | |
| 2957 gap = actual_gap; | |
| 2958 if (PrintMiscellaneous && Verbose) { | |
| 2959 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); | |
| 2960 } | |
| 2961 unmap_memory(base[i], bytes); | |
| 2962 unmap_memory(base[i-1], size[i-1]); | |
| 2963 i-=2; | |
| 2964 continue; | |
| 2965 } | |
| 2966 } | |
| 2967 | |
| 2968 // Does this overlap the block we wanted? Give back the overlapped | |
| 2969 // parts and try again. | |
| 2970 // | |
| 2971 // There is still a bug in this code: if top_overlap == bytes, | |
| 2972 // the overlap is offset from requested region by the value of gap. | |
| 2973 // In this case giving back the overlapped part will not work, | |
| 2974 // because we'll give back the entire block at base[i] and | |
| 2975 // therefore the subsequent allocation will not generate a new gap. | |
| 2976 // This could be fixed with a new algorithm that used larger | |
| 2977 // or variable size chunks to find the requested region - | |
| 2978 // but such a change would introduce additional complications. | |
| 2979 // It's rare enough that the planets align for this bug, | |
| 2980 // so we'll just wait for a fix for 6204603/5003415 which | |
| 2981 // will provide a mmap flag to allow us to avoid this business. | |
| 2982 | |
| 2983 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
| 2984 if (top_overlap >= 0 && top_overlap < bytes) { | |
| 2985 had_top_overlap = true; | |
| 2986 unmap_memory(base[i], top_overlap); | |
| 2987 base[i] += top_overlap; | |
| 2988 size[i] = bytes - top_overlap; | |
| 2989 } else { | |
| 2990 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
| 2991 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
| 2992 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { | |
| 2993 warning("attempt_reserve_memory_at: possible alignment bug"); | |
| 2994 } | |
| 2995 unmap_memory(requested_addr, bottom_overlap); | |
| 2996 size[i] = bytes - bottom_overlap; | |
| 2997 } else { | |
| 2998 size[i] = bytes; | |
| 2999 } | |
| 3000 } | |
| 3001 } | |
| 3002 } | |
| 3003 | |
| 3004 // Give back the unused reserved pieces. | |
| 3005 | |
| 3006 for (int j = 0; j < i; ++j) { | |
| 3007 if (base[j] != NULL) { | |
| 3008 unmap_memory(base[j], size[j]); | |
| 3009 } | |
| 3010 } | |
| 3011 | |
| 3012 return (i < max_tries) ? requested_addr : NULL; | |
| 3013 } | |
| 3014 | |
| 3015 bool os::release_memory(char* addr, size_t bytes) { | |
| 3016 size_t size = bytes; | |
| 3017 return munmap(addr, size) == 0; | |
| 3018 } | |
| 3019 | |
| 3020 static bool solaris_mprotect(char* addr, size_t bytes, int prot) { | |
| 3021 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), | |
| 3022 "addr must be page aligned"); | |
| 3023 int retVal = mprotect(addr, bytes, prot); | |
| 3024 return retVal == 0; | |
| 3025 } | |
| 3026 | |
|
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3027 // Protect memory (Used to pass readonly pages through |
| 0 | 3028 // JNI GetArray<type>Elements with empty arrays.) |
|
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3029 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
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3030 bool is_committed) { |
|
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3031 unsigned int p = 0; |
|
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3032 switch (prot) { |
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3033 case MEM_PROT_NONE: p = PROT_NONE; break; |
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3034 case MEM_PROT_READ: p = PROT_READ; break; |
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3035 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
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3036 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
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3037 default: |
|
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|
3038 ShouldNotReachHere(); |
|
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|
3039 } |
|
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3040 // is_committed is unused. |
|
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|
3041 return solaris_mprotect(addr, bytes, p); |
| 0 | 3042 } |
| 3043 | |
| 3044 // guard_memory and unguard_memory only happens within stack guard pages. | |
| 3045 // Since ISM pertains only to the heap, guard and unguard memory should not | |
| 3046 /// happen with an ISM region. | |
| 3047 bool os::guard_memory(char* addr, size_t bytes) { | |
| 3048 return solaris_mprotect(addr, bytes, PROT_NONE); | |
| 3049 } | |
| 3050 | |
| 3051 bool os::unguard_memory(char* addr, size_t bytes) { | |
| 3052 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC); | |
| 3053 } | |
| 3054 | |
| 3055 // Large page support | |
| 3056 | |
| 3057 // UseLargePages is the master flag to enable/disable large page memory. | |
| 3058 // UseMPSS and UseISM are supported for compatibility reasons. Their combined | |
| 3059 // effects can be described in the following table: | |
| 3060 // | |
| 3061 // UseLargePages UseMPSS UseISM | |
| 3062 // false * * => UseLargePages is the master switch, turning | |
| 3063 // it off will turn off both UseMPSS and | |
| 3064 // UseISM. VM will not use large page memory | |
| 3065 // regardless the settings of UseMPSS/UseISM. | |
| 3066 // true false false => Unless future Solaris provides other | |
| 3067 // mechanism to use large page memory, this | |
| 3068 // combination is equivalent to -UseLargePages, | |
| 3069 // VM will not use large page memory | |
| 3070 // true true false => JVM will use MPSS for large page memory. | |
| 3071 // This is the default behavior. | |
| 3072 // true false true => JVM will use ISM for large page memory. | |
| 3073 // true true true => JVM will use ISM if it is available. | |
| 3074 // Otherwise, JVM will fall back to MPSS. | |
| 3075 // Becaues ISM is now available on all | |
| 3076 // supported Solaris versions, this combination | |
| 3077 // is equivalent to +UseISM -UseMPSS. | |
| 3078 | |
| 3079 typedef int (*getpagesizes_func_type) (size_t[], int); | |
| 3080 static size_t _large_page_size = 0; | |
| 3081 | |
| 3082 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { | |
| 3083 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address | |
| 3084 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc | |
| 3085 // can support multiple page sizes. | |
| 3086 | |
| 3087 // Don't bother to probe page size because getpagesizes() comes with MPSS. | |
| 3088 // ISM is only recommended on old Solaris where there is no MPSS support. | |
| 3089 // Simply choose a conservative value as default. | |
| 3090 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : | |
| 3091 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); | |
| 3092 | |
| 3093 // ISM is available on all supported Solaris versions | |
| 3094 return true; | |
| 3095 } | |
| 3096 | |
| 3097 // Insertion sort for small arrays (descending order). | |
| 3098 static void insertion_sort_descending(size_t* array, int len) { | |
| 3099 for (int i = 0; i < len; i++) { | |
| 3100 size_t val = array[i]; | |
| 3101 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { | |
| 3102 size_t tmp = array[key]; | |
| 3103 array[key] = array[key - 1]; | |
| 3104 array[key - 1] = tmp; | |
| 3105 } | |
| 3106 } | |
| 3107 } | |
| 3108 | |
| 3109 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { | |
| 3110 getpagesizes_func_type getpagesizes_func = | |
| 3111 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); | |
| 3112 if (getpagesizes_func == NULL) { | |
| 3113 if (warn) { | |
| 3114 warning("MPSS is not supported by the operating system."); | |
| 3115 } | |
| 3116 return false; | |
| 3117 } | |
| 3118 | |
| 3119 const unsigned int usable_count = VM_Version::page_size_count(); | |
| 3120 if (usable_count == 1) { | |
| 3121 return false; | |
| 3122 } | |
| 3123 | |
| 3124 // Fill the array of page sizes. | |
| 3125 int n = getpagesizes_func(_page_sizes, page_sizes_max); | |
| 3126 assert(n > 0, "Solaris bug?"); | |
| 3127 if (n == page_sizes_max) { | |
| 3128 // Add a sentinel value (necessary only if the array was completely filled | |
| 3129 // since it is static (zeroed at initialization)). | |
| 3130 _page_sizes[--n] = 0; | |
| 3131 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) | |
| 3132 } | |
| 3133 assert(_page_sizes[n] == 0, "missing sentinel"); | |
| 3134 | |
| 3135 if (n == 1) return false; // Only one page size available. | |
| 3136 | |
| 3137 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and | |
| 3138 // select up to usable_count elements. First sort the array, find the first | |
| 3139 // acceptable value, then copy the usable sizes to the top of the array and | |
| 3140 // trim the rest. Make sure to include the default page size :-). | |
| 3141 // | |
| 3142 // A better policy could get rid of the 4M limit by taking the sizes of the | |
| 3143 // important VM memory regions (java heap and possibly the code cache) into | |
| 3144 // account. | |
| 3145 insertion_sort_descending(_page_sizes, n); | |
| 3146 const size_t size_limit = | |
| 3147 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; | |
| 3148 int beg; | |
| 3149 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; | |
| 3150 const int end = MIN2((int)usable_count, n) - 1; | |
| 3151 for (int cur = 0; cur < end; ++cur, ++beg) { | |
| 3152 _page_sizes[cur] = _page_sizes[beg]; | |
| 3153 } | |
| 3154 _page_sizes[end] = vm_page_size(); | |
| 3155 _page_sizes[end + 1] = 0; | |
| 3156 | |
| 3157 if (_page_sizes[end] > _page_sizes[end - 1]) { | |
| 3158 // Default page size is not the smallest; sort again. | |
| 3159 insertion_sort_descending(_page_sizes, end + 1); | |
| 3160 } | |
| 3161 *page_size = _page_sizes[0]; | |
| 3162 | |
| 3163 return true; | |
| 3164 } | |
| 3165 | |
| 3166 bool os::large_page_init() { | |
| 3167 if (!UseLargePages) { | |
| 3168 UseISM = false; | |
| 3169 UseMPSS = false; | |
| 3170 return false; | |
| 3171 } | |
| 3172 | |
| 3173 // print a warning if any large page related flag is specified on command line | |
| 3174 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || | |
| 3175 !FLAG_IS_DEFAULT(UseISM) || | |
| 3176 !FLAG_IS_DEFAULT(UseMPSS) || | |
| 3177 !FLAG_IS_DEFAULT(LargePageSizeInBytes); | |
| 3178 UseISM = UseISM && | |
| 3179 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); | |
| 3180 if (UseISM) { | |
| 3181 // ISM disables MPSS to be compatible with old JDK behavior | |
| 3182 UseMPSS = false; | |
|
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3183 _page_sizes[0] = _large_page_size; |
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3184 _page_sizes[1] = vm_page_size(); |
| 0 | 3185 } |
| 3186 | |
| 3187 UseMPSS = UseMPSS && | |
| 3188 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); | |
| 3189 | |
| 3190 UseLargePages = UseISM || UseMPSS; | |
| 3191 return UseLargePages; | |
| 3192 } | |
| 3193 | |
| 3194 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { | |
| 3195 // Signal to OS that we want large pages for addresses | |
| 3196 // from addr, addr + bytes | |
| 3197 struct memcntl_mha mpss_struct; | |
| 3198 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; | |
| 3199 mpss_struct.mha_pagesize = align; | |
| 3200 mpss_struct.mha_flags = 0; | |
| 3201 if (memcntl(start, bytes, MC_HAT_ADVISE, | |
| 3202 (caddr_t) &mpss_struct, 0, 0) < 0) { | |
| 3203 debug_only(warning("Attempt to use MPSS failed.")); | |
| 3204 return false; | |
| 3205 } | |
| 3206 return true; | |
| 3207 } | |
| 3208 | |
| 3209 char* os::reserve_memory_special(size_t bytes) { | |
| 3210 assert(UseLargePages && UseISM, "only for ISM large pages"); | |
| 3211 | |
| 3212 size_t size = bytes; | |
| 3213 char* retAddr = NULL; | |
| 3214 int shmid; | |
| 3215 key_t ismKey; | |
| 3216 | |
| 3217 bool warn_on_failure = UseISM && | |
| 3218 (!FLAG_IS_DEFAULT(UseLargePages) || | |
| 3219 !FLAG_IS_DEFAULT(UseISM) || | |
| 3220 !FLAG_IS_DEFAULT(LargePageSizeInBytes) | |
| 3221 ); | |
| 3222 char msg[128]; | |
| 3223 | |
| 3224 ismKey = IPC_PRIVATE; | |
| 3225 | |
| 3226 // Create a large shared memory region to attach to based on size. | |
| 3227 // Currently, size is the total size of the heap | |
| 3228 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); | |
| 3229 if (shmid == -1){ | |
| 3230 if (warn_on_failure) { | |
| 3231 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); | |
| 3232 warning(msg); | |
| 3233 } | |
| 3234 return NULL; | |
| 3235 } | |
| 3236 | |
| 3237 // Attach to the region | |
| 3238 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); | |
| 3239 int err = errno; | |
| 3240 | |
| 3241 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
| 3242 // will be deleted when it's detached by shmdt() or when the process | |
| 3243 // terminates. If shmat() is not successful this will remove the shared | |
| 3244 // segment immediately. | |
| 3245 shmctl(shmid, IPC_RMID, NULL); | |
| 3246 | |
| 3247 if (retAddr == (char *) -1) { | |
| 3248 if (warn_on_failure) { | |
| 3249 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); | |
| 3250 warning(msg); | |
| 3251 } | |
| 3252 return NULL; | |
| 3253 } | |
| 3254 | |
| 3255 return retAddr; | |
| 3256 } | |
| 3257 | |
| 3258 bool os::release_memory_special(char* base, size_t bytes) { | |
| 3259 // detaching the SHM segment will also delete it, see reserve_memory_special() | |
| 3260 int rslt = shmdt(base); | |
| 3261 return rslt == 0; | |
| 3262 } | |
| 3263 | |
| 3264 size_t os::large_page_size() { | |
| 3265 return _large_page_size; | |
| 3266 } | |
| 3267 | |
| 3268 // MPSS allows application to commit large page memory on demand; with ISM | |
| 3269 // the entire memory region must be allocated as shared memory. | |
| 3270 bool os::can_commit_large_page_memory() { | |
| 3271 return UseISM ? false : true; | |
| 3272 } | |
| 3273 | |
|
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3274 bool os::can_execute_large_page_memory() { |
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3275 return UseISM ? false : true; |
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3276 } |
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3277 |
| 0 | 3278 static int os_sleep(jlong millis, bool interruptible) { |
| 3279 const jlong limit = INT_MAX; | |
| 3280 jlong prevtime; | |
| 3281 int res; | |
| 3282 | |
| 3283 while (millis > limit) { | |
| 3284 if ((res = os_sleep(limit, interruptible)) != OS_OK) | |
| 3285 return res; | |
| 3286 millis -= limit; | |
| 3287 } | |
| 3288 | |
| 3289 // Restart interrupted polls with new parameters until the proper delay | |
| 3290 // has been completed. | |
| 3291 | |
| 3292 prevtime = getTimeMillis(); | |
| 3293 | |
| 3294 while (millis > 0) { | |
| 3295 jlong newtime; | |
| 3296 | |
| 3297 if (!interruptible) { | |
| 3298 // Following assert fails for os::yield_all: | |
| 3299 // assert(!thread->is_Java_thread(), "must not be java thread"); | |
| 3300 res = poll(NULL, 0, millis); | |
| 3301 } else { | |
| 3302 JavaThread *jt = JavaThread::current(); | |
| 3303 | |
| 3304 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, | |
| 3305 os::Solaris::clear_interrupted); | |
| 3306 } | |
| 3307 | |
| 3308 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for | |
| 3309 // thread.Interrupt. | |
| 3310 | |
| 3311 if((res == OS_ERR) && (errno == EINTR)) { | |
| 3312 newtime = getTimeMillis(); | |
| 3313 assert(newtime >= prevtime, "time moving backwards"); | |
| 3314 /* Doing prevtime and newtime in microseconds doesn't help precision, | |
| 3315 and trying to round up to avoid lost milliseconds can result in a | |
| 3316 too-short delay. */ | |
| 3317 millis -= newtime - prevtime; | |
| 3318 if(millis <= 0) | |
| 3319 return OS_OK; | |
| 3320 prevtime = newtime; | |
| 3321 } else | |
| 3322 return res; | |
| 3323 } | |
| 3324 | |
| 3325 return OS_OK; | |
| 3326 } | |
| 3327 | |
| 3328 // Read calls from inside the vm need to perform state transitions | |
| 3329 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
| 3330 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); | |
| 3331 } | |
| 3332 | |
| 3333 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
| 3334 assert(thread == Thread::current(), "thread consistency check"); | |
| 3335 | |
| 3336 // TODO-FIXME: this should be removed. | |
| 3337 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock | |
| 3338 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate | |
| 3339 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving | |
| 3340 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel | |
| 3341 // is fooled into believing that the system is making progress. In the code below we block the | |
| 3342 // the watcher thread while safepoint is in progress so that it would not appear as though the | |
| 3343 // system is making progress. | |
| 3344 if (!Solaris::T2_libthread() && | |
| 3345 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { | |
| 3346 // We now try to acquire the threads lock. Since this lock is held by the VM thread during | |
| 3347 // the entire safepoint, the watcher thread will line up here during the safepoint. | |
| 3348 Threads_lock->lock_without_safepoint_check(); | |
| 3349 Threads_lock->unlock(); | |
| 3350 } | |
| 3351 | |
| 3352 if (thread->is_Java_thread()) { | |
| 3353 // This is a JavaThread so we honor the _thread_blocked protocol | |
| 3354 // even for sleeps of 0 milliseconds. This was originally done | |
| 3355 // as a workaround for bug 4338139. However, now we also do it | |
| 3356 // to honor the suspend-equivalent protocol. | |
| 3357 | |
| 3358 JavaThread *jt = (JavaThread *) thread; | |
| 3359 ThreadBlockInVM tbivm(jt); | |
| 3360 | |
| 3361 jt->set_suspend_equivalent(); | |
| 3362 // cleared by handle_special_suspend_equivalent_condition() or | |
| 3363 // java_suspend_self() via check_and_wait_while_suspended() | |
| 3364 | |
| 3365 int ret_code; | |
| 3366 if (millis <= 0) { | |
| 3367 thr_yield(); | |
| 3368 ret_code = 0; | |
| 3369 } else { | |
| 3370 // The original sleep() implementation did not create an | |
| 3371 // OSThreadWaitState helper for sleeps of 0 milliseconds. | |
| 3372 // I'm preserving that decision for now. | |
| 3373 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
| 3374 | |
| 3375 ret_code = os_sleep(millis, interruptible); | |
| 3376 } | |
| 3377 | |
| 3378 // were we externally suspended while we were waiting? | |
| 3379 jt->check_and_wait_while_suspended(); | |
| 3380 | |
| 3381 return ret_code; | |
| 3382 } | |
| 3383 | |
| 3384 // non-JavaThread from this point on: | |
| 3385 | |
| 3386 if (millis <= 0) { | |
| 3387 thr_yield(); | |
| 3388 return 0; | |
| 3389 } | |
| 3390 | |
| 3391 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 3392 | |
| 3393 return os_sleep(millis, interruptible); | |
| 3394 } | |
| 3395 | |
| 3396 int os::naked_sleep() { | |
| 3397 // %% make the sleep time an integer flag. for now use 1 millisec. | |
| 3398 return os_sleep(1, false); | |
| 3399 } | |
| 3400 | |
| 3401 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
| 3402 void os::infinite_sleep() { | |
| 3403 while (true) { // sleep forever ... | |
| 3404 ::sleep(100); // ... 100 seconds at a time | |
| 3405 } | |
| 3406 } | |
| 3407 | |
| 3408 // Used to convert frequent JVM_Yield() to nops | |
| 3409 bool os::dont_yield() { | |
| 3410 if (DontYieldALot) { | |
| 3411 static hrtime_t last_time = 0; | |
| 3412 hrtime_t diff = getTimeNanos() - last_time; | |
| 3413 | |
| 3414 if (diff < DontYieldALotInterval * 1000000) | |
| 3415 return true; | |
| 3416 | |
| 3417 last_time += diff; | |
| 3418 | |
| 3419 return false; | |
| 3420 } | |
| 3421 else { | |
| 3422 return false; | |
| 3423 } | |
| 3424 } | |
| 3425 | |
| 3426 // Caveat: Solaris os::yield() causes a thread-state transition whereas | |
| 3427 // the linux and win32 implementations do not. This should be checked. | |
| 3428 | |
| 3429 void os::yield() { | |
| 3430 // Yields to all threads with same or greater priority | |
| 3431 os::sleep(Thread::current(), 0, false); | |
| 3432 } | |
| 3433 | |
| 3434 // Note that yield semantics are defined by the scheduling class to which | |
| 3435 // the thread currently belongs. Typically, yield will _not yield to | |
| 3436 // other equal or higher priority threads that reside on the dispatch queues | |
| 3437 // of other CPUs. | |
| 3438 | |
| 3439 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } | |
| 3440 | |
| 3441 | |
| 3442 // On Solaris we found that yield_all doesn't always yield to all other threads. | |
| 3443 // There have been cases where there is a thread ready to execute but it doesn't | |
| 3444 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. | |
| 3445 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a | |
| 3446 // SIGWAITING signal which will cause a new lwp to be created. So we count the | |
| 3447 // number of times yield_all is called in the one loop and increase the sleep | |
| 3448 // time after 8 attempts. If this fails too we increase the concurrency level | |
| 3449 // so that the starving thread would get an lwp | |
| 3450 | |
| 3451 void os::yield_all(int attempts) { | |
| 3452 // Yields to all threads, including threads with lower priorities | |
| 3453 if (attempts == 0) { | |
| 3454 os::sleep(Thread::current(), 1, false); | |
| 3455 } else { | |
| 3456 int iterations = attempts % 30; | |
| 3457 if (iterations == 0 && !os::Solaris::T2_libthread()) { | |
| 3458 // thr_setconcurrency and _getconcurrency make sense only under T1. | |
| 3459 int noofLWPS = thr_getconcurrency(); | |
| 3460 if (noofLWPS < (Threads::number_of_threads() + 2)) { | |
| 3461 thr_setconcurrency(thr_getconcurrency() + 1); | |
| 3462 } | |
| 3463 } else if (iterations < 25) { | |
| 3464 os::sleep(Thread::current(), 1, false); | |
| 3465 } else { | |
| 3466 os::sleep(Thread::current(), 10, false); | |
| 3467 } | |
| 3468 } | |
| 3469 } | |
| 3470 | |
| 3471 // Called from the tight loops to possibly influence time-sharing heuristics | |
| 3472 void os::loop_breaker(int attempts) { | |
| 3473 os::yield_all(attempts); | |
| 3474 } | |
| 3475 | |
| 3476 | |
| 3477 // Interface for setting lwp priorities. If we are using T2 libthread, | |
| 3478 // which forces the use of BoundThreads or we manually set UseBoundThreads, | |
| 3479 // all of our threads will be assigned to real lwp's. Using the thr_setprio | |
| 3480 // function is meaningless in this mode so we must adjust the real lwp's priority | |
| 3481 // The routines below implement the getting and setting of lwp priorities. | |
| 3482 // | |
| 3483 // Note: There are three priority scales used on Solaris. Java priotities | |
| 3484 // which range from 1 to 10, libthread "thr_setprio" scale which range | |
| 3485 // from 0 to 127, and the current scheduling class of the process we | |
| 3486 // are running in. This is typically from -60 to +60. | |
| 3487 // The setting of the lwp priorities in done after a call to thr_setprio | |
| 3488 // so Java priorities are mapped to libthread priorities and we map from | |
| 3489 // the latter to lwp priorities. We don't keep priorities stored in | |
| 3490 // Java priorities since some of our worker threads want to set priorities | |
| 3491 // higher than all Java threads. | |
| 3492 // | |
| 3493 // For related information: | |
| 3494 // (1) man -s 2 priocntl | |
| 3495 // (2) man -s 4 priocntl | |
| 3496 // (3) man dispadmin | |
| 3497 // = librt.so | |
| 3498 // = libthread/common/rtsched.c - thrp_setlwpprio(). | |
| 3499 // = ps -cL <pid> ... to validate priority. | |
| 3500 // = sched_get_priority_min and _max | |
| 3501 // pthread_create | |
| 3502 // sched_setparam | |
| 3503 // pthread_setschedparam | |
| 3504 // | |
| 3505 // Assumptions: | |
| 3506 // + We assume that all threads in the process belong to the same | |
| 3507 // scheduling class. IE. an homogenous process. | |
| 3508 // + Must be root or in IA group to change change "interactive" attribute. | |
| 3509 // Priocntl() will fail silently. The only indication of failure is when | |
| 3510 // we read-back the value and notice that it hasn't changed. | |
| 3511 // + Interactive threads enter the runq at the head, non-interactive at the tail. | |
| 3512 // + For RT, change timeslice as well. Invariant: | |
| 3513 // constant "priority integral" | |
| 3514 // Konst == TimeSlice * (60-Priority) | |
| 3515 // Given a priority, compute appropriate timeslice. | |
| 3516 // + Higher numerical values have higher priority. | |
| 3517 | |
| 3518 // sched class attributes | |
| 3519 typedef struct { | |
| 3520 int schedPolicy; // classID | |
| 3521 int maxPrio; | |
| 3522 int minPrio; | |
| 3523 } SchedInfo; | |
| 3524 | |
| 3525 | |
| 3526 static SchedInfo tsLimits, iaLimits, rtLimits; | |
| 3527 | |
| 3528 #ifdef ASSERT | |
| 3529 static int ReadBackValidate = 1; | |
| 3530 #endif | |
| 3531 static int myClass = 0; | |
| 3532 static int myMin = 0; | |
| 3533 static int myMax = 0; | |
| 3534 static int myCur = 0; | |
| 3535 static bool priocntl_enable = false; | |
| 3536 | |
| 3537 | |
| 3538 // Call the version of priocntl suitable for all supported versions | |
| 3539 // of Solaris. We need to call through this wrapper so that we can | |
| 3540 // build on Solaris 9 and run on Solaris 8, 9 and 10. | |
| 3541 // | |
| 3542 // This code should be removed if we ever stop supporting Solaris 8 | |
| 3543 // and earlier releases. | |
| 3544 | |
| 3545 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); | |
| 3546 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); | |
| 3547 static priocntl_type priocntl_ptr = priocntl_stub; | |
| 3548 | |
| 3549 // Stub to set the value of the real pointer, and then call the real | |
| 3550 // function. | |
| 3551 | |
| 3552 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { | |
| 3553 // Try Solaris 8- name only. | |
| 3554 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); | |
| 3555 guarantee(tmp != NULL, "priocntl function not found."); | |
| 3556 priocntl_ptr = tmp; | |
| 3557 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); | |
| 3558 } | |
| 3559 | |
| 3560 | |
| 3561 // lwp_priocntl_init | |
| 3562 // | |
| 3563 // Try to determine the priority scale for our process. | |
| 3564 // | |
| 3565 // Return errno or 0 if OK. | |
| 3566 // | |
| 3567 static | |
| 3568 int lwp_priocntl_init () | |
| 3569 { | |
| 3570 int rslt; | |
| 3571 pcinfo_t ClassInfo; | |
| 3572 pcparms_t ParmInfo; | |
| 3573 int i; | |
| 3574 | |
| 3575 if (!UseThreadPriorities) return 0; | |
| 3576 | |
| 3577 // We are using Bound threads, we need to determine our priority ranges | |
| 3578 if (os::Solaris::T2_libthread() || UseBoundThreads) { | |
| 3579 // If ThreadPriorityPolicy is 1, switch tables | |
| 3580 if (ThreadPriorityPolicy == 1) { | |
| 3581 for (i = 0 ; i < MaxPriority+1; i++) | |
| 3582 os::java_to_os_priority[i] = prio_policy1[i]; | |
| 3583 } | |
| 3584 } | |
| 3585 // Not using Bound Threads, set to ThreadPolicy 1 | |
| 3586 else { | |
| 3587 for ( i = 0 ; i < MaxPriority+1; i++ ) { | |
| 3588 os::java_to_os_priority[i] = prio_policy1[i]; | |
| 3589 } | |
| 3590 return 0; | |
| 3591 } | |
| 3592 | |
| 3593 | |
| 3594 // Get IDs for a set of well-known scheduling classes. | |
| 3595 // TODO-FIXME: GETCLINFO returns the current # of classes in the | |
| 3596 // the system. We should have a loop that iterates over the | |
| 3597 // classID values, which are known to be "small" integers. | |
| 3598 | |
| 3599 strcpy(ClassInfo.pc_clname, "TS"); | |
| 3600 ClassInfo.pc_cid = -1; | |
| 3601 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
| 3602 if (rslt < 0) return errno; | |
| 3603 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); | |
| 3604 tsLimits.schedPolicy = ClassInfo.pc_cid; | |
| 3605 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; | |
| 3606 tsLimits.minPrio = -tsLimits.maxPrio; | |
| 3607 | |
| 3608 strcpy(ClassInfo.pc_clname, "IA"); | |
| 3609 ClassInfo.pc_cid = -1; | |
| 3610 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
| 3611 if (rslt < 0) return errno; | |
| 3612 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); | |
| 3613 iaLimits.schedPolicy = ClassInfo.pc_cid; | |
| 3614 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; | |
| 3615 iaLimits.minPrio = -iaLimits.maxPrio; | |
| 3616 | |
| 3617 strcpy(ClassInfo.pc_clname, "RT"); | |
| 3618 ClassInfo.pc_cid = -1; | |
| 3619 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
| 3620 if (rslt < 0) return errno; | |
| 3621 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); | |
| 3622 rtLimits.schedPolicy = ClassInfo.pc_cid; | |
| 3623 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; | |
| 3624 rtLimits.minPrio = 0; | |
| 3625 | |
| 3626 | |
| 3627 // Query our "current" scheduling class. | |
| 3628 // This will normally be IA,TS or, rarely, RT. | |
| 3629 memset (&ParmInfo, 0, sizeof(ParmInfo)); | |
| 3630 ParmInfo.pc_cid = PC_CLNULL; | |
| 3631 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); | |
| 3632 if ( rslt < 0 ) return errno; | |
| 3633 myClass = ParmInfo.pc_cid; | |
| 3634 | |
| 3635 // We now know our scheduling classId, get specific information | |
| 3636 // the class. | |
| 3637 ClassInfo.pc_cid = myClass; | |
| 3638 ClassInfo.pc_clname[0] = 0; | |
| 3639 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); | |
| 3640 if ( rslt < 0 ) return errno; | |
| 3641 | |
| 3642 if (ThreadPriorityVerbose) | |
| 3643 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); | |
| 3644 | |
| 3645 memset(&ParmInfo, 0, sizeof(pcparms_t)); | |
| 3646 ParmInfo.pc_cid = PC_CLNULL; | |
| 3647 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); | |
| 3648 if (rslt < 0) return errno; | |
| 3649 | |
| 3650 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
| 3651 myMin = rtLimits.minPrio; | |
| 3652 myMax = rtLimits.maxPrio; | |
| 3653 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
| 3654 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; | |
| 3655 myMin = iaLimits.minPrio; | |
| 3656 myMax = iaLimits.maxPrio; | |
| 3657 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict | |
| 3658 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
| 3659 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; | |
| 3660 myMin = tsLimits.minPrio; | |
| 3661 myMax = tsLimits.maxPrio; | |
| 3662 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict | |
| 3663 } else { | |
| 3664 // No clue - punt | |
| 3665 if (ThreadPriorityVerbose) | |
| 3666 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); | |
| 3667 return EINVAL; // no clue, punt | |
| 3668 } | |
| 3669 | |
| 3670 if (ThreadPriorityVerbose) | |
| 3671 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); | |
| 3672 | |
| 3673 priocntl_enable = true; // Enable changing priorities | |
| 3674 return 0; | |
| 3675 } | |
| 3676 | |
| 3677 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) | |
| 3678 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) | |
| 3679 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) | |
| 3680 | |
| 3681 | |
| 3682 // scale_to_lwp_priority | |
| 3683 // | |
| 3684 // Convert from the libthread "thr_setprio" scale to our current | |
| 3685 // lwp scheduling class scale. | |
| 3686 // | |
| 3687 static | |
| 3688 int scale_to_lwp_priority (int rMin, int rMax, int x) | |
| 3689 { | |
| 3690 int v; | |
| 3691 | |
| 3692 if (x == 127) return rMax; // avoid round-down | |
| 3693 v = (((x*(rMax-rMin)))/128)+rMin; | |
| 3694 return v; | |
| 3695 } | |
| 3696 | |
| 3697 | |
| 3698 // set_lwp_priority | |
| 3699 // | |
| 3700 // Set the priority of the lwp. This call should only be made | |
| 3701 // when using bound threads (T2 threads are bound by default). | |
| 3702 // | |
| 3703 int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) | |
| 3704 { | |
| 3705 int rslt; | |
| 3706 int Actual, Expected, prv; | |
| 3707 pcparms_t ParmInfo; // for GET-SET | |
| 3708 #ifdef ASSERT | |
| 3709 pcparms_t ReadBack; // for readback | |
| 3710 #endif | |
| 3711 | |
| 3712 // Set priority via PC_GETPARMS, update, PC_SETPARMS | |
| 3713 // Query current values. | |
| 3714 // TODO: accelerate this by eliminating the PC_GETPARMS call. | |
| 3715 // Cache "pcparms_t" in global ParmCache. | |
| 3716 // TODO: elide set-to-same-value | |
| 3717 | |
| 3718 // If something went wrong on init, don't change priorities. | |
| 3719 if ( !priocntl_enable ) { | |
| 3720 if (ThreadPriorityVerbose) | |
| 3721 tty->print_cr("Trying to set priority but init failed, ignoring"); | |
| 3722 return EINVAL; | |
| 3723 } | |
| 3724 | |
| 3725 | |
| 3726 // If lwp hasn't started yet, just return | |
| 3727 // the _start routine will call us again. | |
| 3728 if ( lwpid <= 0 ) { | |
| 3729 if (ThreadPriorityVerbose) { | |
| 3730 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", | |
| 3731 ThreadID, newPrio); | |
| 3732 } | |
| 3733 return 0; | |
| 3734 } | |
| 3735 | |
| 3736 if (ThreadPriorityVerbose) { | |
| 3737 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", | |
| 3738 ThreadID, lwpid, newPrio); | |
| 3739 } | |
| 3740 | |
| 3741 memset(&ParmInfo, 0, sizeof(pcparms_t)); | |
| 3742 ParmInfo.pc_cid = PC_CLNULL; | |
| 3743 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); | |
| 3744 if (rslt < 0) return errno; | |
| 3745 | |
| 3746 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
| 3747 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; | |
| 3748 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); | |
| 3749 rtInfo->rt_tqsecs = RT_NOCHANGE; | |
| 3750 rtInfo->rt_tqnsecs = RT_NOCHANGE; | |
| 3751 if (ThreadPriorityVerbose) { | |
| 3752 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); | |
| 3753 } | |
| 3754 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
| 3755 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; | |
| 3756 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); | |
| 3757 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); | |
| 3758 iaInfo->ia_uprilim = IA_NOCHANGE; | |
| 3759 iaInfo->ia_mode = IA_NOCHANGE; | |
| 3760 if (ThreadPriorityVerbose) { | |
| 3761 tty->print_cr ("IA: [%d...%d] %d->%d\n", | |
| 3762 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); | |
| 3763 } | |
| 3764 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
| 3765 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; | |
| 3766 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); | |
| 3767 prv = tsInfo->ts_upri; | |
| 3768 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); | |
| 3769 tsInfo->ts_uprilim = IA_NOCHANGE; | |
| 3770 if (ThreadPriorityVerbose) { | |
| 3771 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", | |
| 3772 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); | |
| 3773 } | |
| 3774 if (prv == tsInfo->ts_upri) return 0; | |
| 3775 } else { | |
| 3776 if ( ThreadPriorityVerbose ) { | |
| 3777 tty->print_cr ("Unknown scheduling class\n"); | |
| 3778 } | |
| 3779 return EINVAL; // no clue, punt | |
| 3780 } | |
| 3781 | |
| 3782 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); | |
| 3783 if (ThreadPriorityVerbose && rslt) { | |
| 3784 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); | |
| 3785 } | |
| 3786 if (rslt < 0) return errno; | |
| 3787 | |
| 3788 #ifdef ASSERT | |
| 3789 // Sanity check: read back what we just attempted to set. | |
| 3790 // In theory it could have changed in the interim ... | |
| 3791 // | |
| 3792 // The priocntl system call is tricky. | |
| 3793 // Sometimes it'll validate the priority value argument and | |
| 3794 // return EINVAL if unhappy. At other times it fails silently. | |
| 3795 // Readbacks are prudent. | |
| 3796 | |
| 3797 if (!ReadBackValidate) return 0; | |
| 3798 | |
| 3799 memset(&ReadBack, 0, sizeof(pcparms_t)); | |
| 3800 ReadBack.pc_cid = PC_CLNULL; | |
| 3801 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); | |
| 3802 assert(rslt >= 0, "priocntl failed"); | |
| 3803 Actual = Expected = 0xBAD; | |
| 3804 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); | |
| 3805 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
| 3806 Actual = RTPRI(ReadBack)->rt_pri; | |
| 3807 Expected = RTPRI(ParmInfo)->rt_pri; | |
| 3808 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
| 3809 Actual = IAPRI(ReadBack)->ia_upri; | |
| 3810 Expected = IAPRI(ParmInfo)->ia_upri; | |
| 3811 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
| 3812 Actual = TSPRI(ReadBack)->ts_upri; | |
| 3813 Expected = TSPRI(ParmInfo)->ts_upri; | |
| 3814 } else { | |
| 3815 if ( ThreadPriorityVerbose ) { | |
| 3816 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); | |
| 3817 } | |
| 3818 } | |
| 3819 | |
| 3820 if (Actual != Expected) { | |
| 3821 if ( ThreadPriorityVerbose ) { | |
| 3822 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", | |
| 3823 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); | |
| 3824 } | |
| 3825 } | |
| 3826 #endif | |
| 3827 | |
| 3828 return 0; | |
| 3829 } | |
| 3830 | |
| 3831 | |
| 3832 | |
| 3833 // Solaris only gives access to 128 real priorities at a time, | |
| 3834 // so we expand Java's ten to fill this range. This would be better | |
| 3835 // if we dynamically adjusted relative priorities. | |
| 3836 // | |
| 3837 // The ThreadPriorityPolicy option allows us to select 2 different | |
| 3838 // priority scales. | |
| 3839 // | |
| 3840 // ThreadPriorityPolicy=0 | |
| 3841 // Since the Solaris' default priority is MaximumPriority, we do not | |
| 3842 // set a priority lower than Max unless a priority lower than | |
| 3843 // NormPriority is requested. | |
| 3844 // | |
| 3845 // ThreadPriorityPolicy=1 | |
| 3846 // This mode causes the priority table to get filled with | |
| 3847 // linear values. NormPriority get's mapped to 50% of the | |
| 3848 // Maximum priority an so on. This will cause VM threads | |
| 3849 // to get unfair treatment against other Solaris processes | |
| 3850 // which do not explicitly alter their thread priorities. | |
| 3851 // | |
| 3852 | |
| 3853 | |
| 3854 int os::java_to_os_priority[MaxPriority + 1] = { | |
| 3855 -99999, // 0 Entry should never be used | |
| 3856 | |
| 3857 0, // 1 MinPriority | |
| 3858 32, // 2 | |
| 3859 64, // 3 | |
| 3860 | |
| 3861 96, // 4 | |
| 3862 127, // 5 NormPriority | |
| 3863 127, // 6 | |
| 3864 | |
| 3865 127, // 7 | |
| 3866 127, // 8 | |
| 3867 127, // 9 NearMaxPriority | |
| 3868 | |
| 3869 127 // 10 MaxPriority | |
| 3870 }; | |
| 3871 | |
| 3872 | |
| 3873 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
| 3874 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); | |
| 3875 if ( !UseThreadPriorities ) return OS_OK; | |
| 3876 int status = thr_setprio(thread->osthread()->thread_id(), newpri); | |
| 3877 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) | |
| 3878 status |= (set_lwp_priority (thread->osthread()->thread_id(), | |
| 3879 thread->osthread()->lwp_id(), newpri )); | |
| 3880 return (status == 0) ? OS_OK : OS_ERR; | |
| 3881 } | |
| 3882 | |
| 3883 | |
| 3884 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
| 3885 int p; | |
| 3886 if ( !UseThreadPriorities ) { | |
| 3887 *priority_ptr = NormalPriority; | |
| 3888 return OS_OK; | |
| 3889 } | |
| 3890 int status = thr_getprio(thread->osthread()->thread_id(), &p); | |
| 3891 if (status != 0) { | |
| 3892 return OS_ERR; | |
| 3893 } | |
| 3894 *priority_ptr = p; | |
| 3895 return OS_OK; | |
| 3896 } | |
| 3897 | |
| 3898 | |
| 3899 // Hint to the underlying OS that a task switch would not be good. | |
| 3900 // Void return because it's a hint and can fail. | |
| 3901 void os::hint_no_preempt() { | |
| 3902 schedctl_start(schedctl_init()); | |
| 3903 } | |
| 3904 | |
| 3905 void os::interrupt(Thread* thread) { | |
| 3906 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); | |
| 3907 | |
| 3908 OSThread* osthread = thread->osthread(); | |
| 3909 | |
| 3910 int isInterrupted = osthread->interrupted(); | |
| 3911 if (!isInterrupted) { | |
| 3912 osthread->set_interrupted(true); | |
| 3913 OrderAccess::fence(); | |
| 3914 // os::sleep() is implemented with either poll (NULL,0,timeout) or | |
| 3915 // by parking on _SleepEvent. If the former, thr_kill will unwedge | |
| 3916 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. | |
| 3917 ParkEvent * const slp = thread->_SleepEvent ; | |
| 3918 if (slp != NULL) slp->unpark() ; | |
| 3919 } | |
| 3920 | |
| 3921 // For JSR166: unpark after setting status but before thr_kill -dl | |
| 3922 if (thread->is_Java_thread()) { | |
| 3923 ((JavaThread*)thread)->parker()->unpark(); | |
| 3924 } | |
| 3925 | |
| 3926 // Handle interruptible wait() ... | |
| 3927 ParkEvent * const ev = thread->_ParkEvent ; | |
| 3928 if (ev != NULL) ev->unpark() ; | |
| 3929 | |
| 3930 // When events are used everywhere for os::sleep, then this thr_kill | |
| 3931 // will only be needed if UseVMInterruptibleIO is true. | |
| 3932 | |
| 3933 if (!isInterrupted) { | |
| 3934 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); | |
| 3935 assert_status(status == 0, status, "thr_kill"); | |
| 3936 | |
| 3937 // Bump thread interruption counter | |
| 3938 RuntimeService::record_thread_interrupt_signaled_count(); | |
| 3939 } | |
| 3940 } | |
| 3941 | |
| 3942 | |
| 3943 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 3944 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); | |
| 3945 | |
| 3946 OSThread* osthread = thread->osthread(); | |
| 3947 | |
| 3948 bool res = osthread->interrupted(); | |
| 3949 | |
| 3950 // NOTE that since there is no "lock" around these two operations, | |
| 3951 // there is the possibility that the interrupted flag will be | |
| 3952 // "false" but that the interrupt event will be set. This is | |
| 3953 // intentional. The effect of this is that Object.wait() will appear | |
| 3954 // to have a spurious wakeup, which is not harmful, and the | |
| 3955 // possibility is so rare that it is not worth the added complexity | |
| 3956 // to add yet another lock. It has also been recommended not to put | |
| 3957 // the interrupted flag into the os::Solaris::Event structure, | |
| 3958 // because it hides the issue. | |
| 3959 if (res && clear_interrupted) { | |
| 3960 osthread->set_interrupted(false); | |
| 3961 } | |
| 3962 return res; | |
| 3963 } | |
| 3964 | |
| 3965 | |
| 3966 void os::print_statistics() { | |
| 3967 } | |
| 3968 | |
| 3969 int os::message_box(const char* title, const char* message) { | |
| 3970 int i; | |
| 3971 fdStream err(defaultStream::error_fd()); | |
| 3972 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 3973 err.cr(); | |
| 3974 err.print_raw_cr(title); | |
| 3975 for (i = 0; i < 78; i++) err.print_raw("-"); | |
| 3976 err.cr(); | |
| 3977 err.print_raw_cr(message); | |
| 3978 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 3979 err.cr(); | |
| 3980 | |
| 3981 char buf[16]; | |
| 3982 // Prevent process from exiting upon "read error" without consuming all CPU | |
| 3983 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
| 3984 | |
| 3985 return buf[0] == 'y' || buf[0] == 'Y'; | |
| 3986 } | |
| 3987 | |
| 3988 // A lightweight implementation that does not suspend the target thread and | |
| 3989 // thus returns only a hint. Used for profiling only! | |
| 3990 ExtendedPC os::get_thread_pc(Thread* thread) { | |
| 3991 // Make sure that it is called by the watcher and the Threads lock is owned. | |
| 3992 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); | |
| 3993 // For now, is only used to profile the VM Thread | |
| 3994 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
| 3995 ExtendedPC epc; | |
| 3996 | |
| 3997 GetThreadPC_Callback cb(ProfileVM_lock); | |
| 3998 OSThread *osthread = thread->osthread(); | |
| 3999 const int time_to_wait = 400; // 400ms wait for initial response | |
| 4000 int status = cb.interrupt(thread, time_to_wait); | |
| 4001 | |
| 4002 if (cb.is_done() ) { | |
| 4003 epc = cb.addr(); | |
| 4004 } else { | |
| 4005 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", | |
| 4006 osthread->thread_id(), status);); | |
| 4007 // epc is already NULL | |
| 4008 } | |
| 4009 return epc; | |
| 4010 } | |
| 4011 | |
| 4012 | |
| 4013 // This does not do anything on Solaris. This is basically a hook for being | |
| 4014 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32. | |
| 4015 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { | |
| 4016 f(value, method, args, thread); | |
| 4017 } | |
| 4018 | |
| 4019 // This routine may be used by user applications as a "hook" to catch signals. | |
| 4020 // The user-defined signal handler must pass unrecognized signals to this | |
| 4021 // routine, and if it returns true (non-zero), then the signal handler must | |
| 4022 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
| 4023 // routine will never retun false (zero), but instead will execute a VM panic | |
| 4024 // routine kill the process. | |
| 4025 // | |
| 4026 // If this routine returns false, it is OK to call it again. This allows | |
| 4027 // the user-defined signal handler to perform checks either before or after | |
| 4028 // the VM performs its own checks. Naturally, the user code would be making | |
| 4029 // a serious error if it tried to handle an exception (such as a null check | |
| 4030 // or breakpoint) that the VM was generating for its own correct operation. | |
| 4031 // | |
| 4032 // This routine may recognize any of the following kinds of signals: | |
| 4033 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, | |
| 4034 // os::Solaris::SIGasync | |
| 4035 // It should be consulted by handlers for any of those signals. | |
| 4036 // It explicitly does not recognize os::Solaris::SIGinterrupt | |
| 4037 // | |
| 4038 // The caller of this routine must pass in the three arguments supplied | |
| 4039 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
| 4040 // field of the structure passed to sigaction(). This routine assumes that | |
| 4041 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
| 4042 // | |
| 4043 // Note that the VM will print warnings if it detects conflicting signal | |
| 4044 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
| 4045 // | |
| 4046 extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); | |
| 4047 | |
| 4048 | |
| 4049 void signalHandler(int sig, siginfo_t* info, void* ucVoid) { | |
| 4050 JVM_handle_solaris_signal(sig, info, ucVoid, true); | |
| 4051 } | |
| 4052 | |
| 4053 /* Do not delete - if guarantee is ever removed, a signal handler (even empty) | |
| 4054 is needed to provoke threads blocked on IO to return an EINTR | |
| 4055 Note: this explicitly does NOT call JVM_handle_solaris_signal and | |
| 4056 does NOT participate in signal chaining due to requirement for | |
| 4057 NOT setting SA_RESTART to make EINTR work. */ | |
| 4058 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { | |
| 4059 if (UseSignalChaining) { | |
| 4060 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); | |
| 4061 if (actp && actp->sa_handler) { | |
| 4062 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); | |
| 4063 } | |
| 4064 } | |
| 4065 } | |
| 4066 | |
| 4067 // This boolean allows users to forward their own non-matching signals | |
| 4068 // to JVM_handle_solaris_signal, harmlessly. | |
| 4069 bool os::Solaris::signal_handlers_are_installed = false; | |
| 4070 | |
| 4071 // For signal-chaining | |
| 4072 bool os::Solaris::libjsig_is_loaded = false; | |
| 4073 typedef struct sigaction *(*get_signal_t)(int); | |
| 4074 get_signal_t os::Solaris::get_signal_action = NULL; | |
| 4075 | |
| 4076 struct sigaction* os::Solaris::get_chained_signal_action(int sig) { | |
| 4077 struct sigaction *actp = NULL; | |
| 4078 | |
| 4079 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { | |
| 4080 // Retrieve the old signal handler from libjsig | |
| 4081 actp = (*get_signal_action)(sig); | |
| 4082 } | |
| 4083 if (actp == NULL) { | |
| 4084 // Retrieve the preinstalled signal handler from jvm | |
| 4085 actp = get_preinstalled_handler(sig); | |
| 4086 } | |
| 4087 | |
| 4088 return actp; | |
| 4089 } | |
| 4090 | |
| 4091 static bool call_chained_handler(struct sigaction *actp, int sig, | |
| 4092 siginfo_t *siginfo, void *context) { | |
| 4093 // Call the old signal handler | |
| 4094 if (actp->sa_handler == SIG_DFL) { | |
| 4095 // It's more reasonable to let jvm treat it as an unexpected exception | |
| 4096 // instead of taking the default action. | |
| 4097 return false; | |
| 4098 } else if (actp->sa_handler != SIG_IGN) { | |
| 4099 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
| 4100 // automaticlly block the signal | |
| 4101 sigaddset(&(actp->sa_mask), sig); | |
| 4102 } | |
| 4103 | |
| 4104 sa_handler_t hand; | |
| 4105 sa_sigaction_t sa; | |
| 4106 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; | |
| 4107 // retrieve the chained handler | |
| 4108 if (siginfo_flag_set) { | |
| 4109 sa = actp->sa_sigaction; | |
| 4110 } else { | |
| 4111 hand = actp->sa_handler; | |
| 4112 } | |
| 4113 | |
| 4114 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
| 4115 actp->sa_handler = SIG_DFL; | |
| 4116 } | |
| 4117 | |
| 4118 // try to honor the signal mask | |
| 4119 sigset_t oset; | |
| 4120 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
| 4121 | |
| 4122 // call into the chained handler | |
| 4123 if (siginfo_flag_set) { | |
| 4124 (*sa)(sig, siginfo, context); | |
| 4125 } else { | |
| 4126 (*hand)(sig); | |
| 4127 } | |
| 4128 | |
| 4129 // restore the signal mask | |
| 4130 thr_sigsetmask(SIG_SETMASK, &oset, 0); | |
| 4131 } | |
| 4132 // Tell jvm's signal handler the signal is taken care of. | |
| 4133 return true; | |
| 4134 } | |
| 4135 | |
| 4136 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
| 4137 bool chained = false; | |
| 4138 // signal-chaining | |
| 4139 if (UseSignalChaining) { | |
| 4140 struct sigaction *actp = get_chained_signal_action(sig); | |
| 4141 if (actp != NULL) { | |
| 4142 chained = call_chained_handler(actp, sig, siginfo, context); | |
| 4143 } | |
| 4144 } | |
| 4145 return chained; | |
| 4146 } | |
| 4147 | |
| 4148 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { | |
| 4149 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); | |
| 4150 if (preinstalled_sigs[sig] != 0) { | |
| 4151 return &chainedsigactions[sig]; | |
| 4152 } | |
| 4153 return NULL; | |
| 4154 } | |
| 4155 | |
| 4156 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
| 4157 | |
| 4158 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); | |
| 4159 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); | |
| 4160 chainedsigactions[sig] = oldAct; | |
| 4161 preinstalled_sigs[sig] = 1; | |
| 4162 } | |
| 4163 | |
| 4164 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { | |
| 4165 // Check for overwrite. | |
| 4166 struct sigaction oldAct; | |
| 4167 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
| 4168 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4169 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4170 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
| 4171 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
| 4172 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { | |
| 4173 if (AllowUserSignalHandlers || !set_installed) { | |
| 4174 // Do not overwrite; user takes responsibility to forward to us. | |
| 4175 return; | |
| 4176 } else if (UseSignalChaining) { | |
| 4177 if (oktochain) { | |
| 4178 // save the old handler in jvm | |
| 4179 save_preinstalled_handler(sig, oldAct); | |
| 4180 } else { | |
| 4181 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); | |
| 4182 } | |
| 4183 // libjsig also interposes the sigaction() call below and saves the | |
| 4184 // old sigaction on it own. | |
| 4185 } else { | |
| 4186 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); | |
| 4187 } | |
| 4188 } | |
| 4189 | |
| 4190 struct sigaction sigAct; | |
| 4191 sigfillset(&(sigAct.sa_mask)); | |
| 4192 sigAct.sa_handler = SIG_DFL; | |
| 4193 | |
| 4194 sigAct.sa_sigaction = signalHandler; | |
| 4195 // Handle SIGSEGV on alternate signal stack if | |
| 4196 // not using stack banging | |
| 4197 if (!UseStackBanging && sig == SIGSEGV) { | |
| 4198 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; | |
| 4199 // Interruptible i/o requires SA_RESTART cleared so EINTR | |
| 4200 // is returned instead of restarting system calls | |
| 4201 } else if (sig == os::Solaris::SIGinterrupt()) { | |
| 4202 sigemptyset(&sigAct.sa_mask); | |
| 4203 sigAct.sa_handler = NULL; | |
| 4204 sigAct.sa_flags = SA_SIGINFO; | |
| 4205 sigAct.sa_sigaction = sigINTRHandler; | |
| 4206 } else { | |
| 4207 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; | |
| 4208 } | |
| 4209 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); | |
| 4210 | |
| 4211 sigaction(sig, &sigAct, &oldAct); | |
| 4212 | |
| 4213 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4214 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4215 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
| 4216 } | |
| 4217 | |
| 4218 | |
| 4219 #define DO_SIGNAL_CHECK(sig) \ | |
| 4220 if (!sigismember(&check_signal_done, sig)) \ | |
| 4221 os::Solaris::check_signal_handler(sig) | |
| 4222 | |
| 4223 // This method is a periodic task to check for misbehaving JNI applications | |
| 4224 // under CheckJNI, we can add any periodic checks here | |
| 4225 | |
| 4226 void os::run_periodic_checks() { | |
| 4227 // A big source of grief is hijacking virt. addr 0x0 on Solaris, | |
| 4228 // thereby preventing a NULL checks. | |
| 4229 if(!check_addr0_done) check_addr0_done = check_addr0(tty); | |
| 4230 | |
| 4231 if (check_signals == false) return; | |
| 4232 | |
| 4233 // SEGV and BUS if overridden could potentially prevent | |
| 4234 // generation of hs*.log in the event of a crash, debugging | |
| 4235 // such a case can be very challenging, so we absolutely | |
| 4236 // check for the following for a good measure: | |
| 4237 DO_SIGNAL_CHECK(SIGSEGV); | |
| 4238 DO_SIGNAL_CHECK(SIGILL); | |
| 4239 DO_SIGNAL_CHECK(SIGFPE); | |
| 4240 DO_SIGNAL_CHECK(SIGBUS); | |
| 4241 DO_SIGNAL_CHECK(SIGPIPE); | |
| 4242 DO_SIGNAL_CHECK(SIGXFSZ); | |
| 4243 | |
| 4244 // ReduceSignalUsage allows the user to override these handlers | |
| 4245 // see comments at the very top and jvm_solaris.h | |
| 4246 if (!ReduceSignalUsage) { | |
| 4247 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
| 4248 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
| 4249 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
| 4250 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
| 4251 } | |
| 4252 | |
| 4253 // See comments above for using JVM1/JVM2 and UseAltSigs | |
| 4254 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); | |
| 4255 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); | |
| 4256 | |
| 4257 } | |
| 4258 | |
| 4259 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
| 4260 | |
| 4261 static os_sigaction_t os_sigaction = NULL; | |
| 4262 | |
| 4263 void os::Solaris::check_signal_handler(int sig) { | |
| 4264 char buf[O_BUFLEN]; | |
| 4265 address jvmHandler = NULL; | |
| 4266 | |
| 4267 struct sigaction act; | |
| 4268 if (os_sigaction == NULL) { | |
| 4269 // only trust the default sigaction, in case it has been interposed | |
| 4270 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
| 4271 if (os_sigaction == NULL) return; | |
| 4272 } | |
| 4273 | |
| 4274 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
| 4275 | |
| 4276 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
| 4277 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
| 4278 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
| 4279 | |
| 4280 | |
| 4281 switch(sig) { | |
| 4282 case SIGSEGV: | |
| 4283 case SIGBUS: | |
| 4284 case SIGFPE: | |
| 4285 case SIGPIPE: | |
| 4286 case SIGXFSZ: | |
| 4287 case SIGILL: | |
| 4288 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); | |
| 4289 break; | |
| 4290 | |
| 4291 case SHUTDOWN1_SIGNAL: | |
| 4292 case SHUTDOWN2_SIGNAL: | |
| 4293 case SHUTDOWN3_SIGNAL: | |
| 4294 case BREAK_SIGNAL: | |
| 4295 jvmHandler = (address)user_handler(); | |
| 4296 break; | |
| 4297 | |
| 4298 default: | |
| 4299 int intrsig = os::Solaris::SIGinterrupt(); | |
| 4300 int asynsig = os::Solaris::SIGasync(); | |
| 4301 | |
| 4302 if (sig == intrsig) { | |
| 4303 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); | |
| 4304 } else if (sig == asynsig) { | |
| 4305 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); | |
| 4306 } else { | |
| 4307 return; | |
| 4308 } | |
| 4309 break; | |
| 4310 } | |
| 4311 | |
| 4312 | |
| 4313 if (thisHandler != jvmHandler) { | |
| 4314 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
| 4315 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
| 4316 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
| 4317 // No need to check this sig any longer | |
| 4318 sigaddset(&check_signal_done, sig); | |
| 4319 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { | |
| 4320 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
| 4321 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); | |
| 4322 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
| 4323 // No need to check this sig any longer | |
| 4324 sigaddset(&check_signal_done, sig); | |
| 4325 } | |
| 4326 | |
| 4327 // Print all the signal handler state | |
| 4328 if (sigismember(&check_signal_done, sig)) { | |
| 4329 print_signal_handlers(tty, buf, O_BUFLEN); | |
| 4330 } | |
| 4331 | |
| 4332 } | |
| 4333 | |
| 4334 void os::Solaris::install_signal_handlers() { | |
| 4335 bool libjsigdone = false; | |
| 4336 signal_handlers_are_installed = true; | |
| 4337 | |
| 4338 // signal-chaining | |
| 4339 typedef void (*signal_setting_t)(); | |
| 4340 signal_setting_t begin_signal_setting = NULL; | |
| 4341 signal_setting_t end_signal_setting = NULL; | |
| 4342 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4343 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
| 4344 if (begin_signal_setting != NULL) { | |
| 4345 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4346 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
| 4347 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
| 4348 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
| 4349 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, | |
| 4350 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); | |
| 4351 libjsig_is_loaded = true; | |
| 4352 if (os::Solaris::get_libjsig_version != NULL) { | |
| 4353 libjsigversion = (*os::Solaris::get_libjsig_version)(); | |
| 4354 } | |
| 4355 assert(UseSignalChaining, "should enable signal-chaining"); | |
| 4356 } | |
| 4357 if (libjsig_is_loaded) { | |
| 4358 // Tell libjsig jvm is setting signal handlers | |
| 4359 (*begin_signal_setting)(); | |
| 4360 } | |
| 4361 | |
| 4362 set_signal_handler(SIGSEGV, true, true); | |
| 4363 set_signal_handler(SIGPIPE, true, true); | |
| 4364 set_signal_handler(SIGXFSZ, true, true); | |
| 4365 set_signal_handler(SIGBUS, true, true); | |
| 4366 set_signal_handler(SIGILL, true, true); | |
| 4367 set_signal_handler(SIGFPE, true, true); | |
| 4368 | |
| 4369 | |
| 4370 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { | |
| 4371 | |
| 4372 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so | |
| 4373 // can not register overridable signals which might be > 32 | |
| 4374 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { | |
| 4375 // Tell libjsig jvm has finished setting signal handlers | |
| 4376 (*end_signal_setting)(); | |
| 4377 libjsigdone = true; | |
| 4378 } | |
| 4379 } | |
| 4380 | |
| 4381 // Never ok to chain our SIGinterrupt | |
| 4382 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); | |
| 4383 set_signal_handler(os::Solaris::SIGasync(), true, true); | |
| 4384 | |
| 4385 if (libjsig_is_loaded && !libjsigdone) { | |
| 4386 // Tell libjsig jvm finishes setting signal handlers | |
| 4387 (*end_signal_setting)(); | |
| 4388 } | |
| 4389 | |
| 4390 // We don't activate signal checker if libjsig is in place, we trust ourselves | |
| 4391 // and if UserSignalHandler is installed all bets are off | |
| 4392 if (CheckJNICalls) { | |
| 4393 if (libjsig_is_loaded) { | |
| 4394 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); | |
| 4395 check_signals = false; | |
| 4396 } | |
| 4397 if (AllowUserSignalHandlers) { | |
| 4398 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); | |
| 4399 check_signals = false; | |
| 4400 } | |
| 4401 } | |
| 4402 } | |
| 4403 | |
| 4404 | |
| 4405 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); | |
| 4406 | |
| 4407 const char * signames[] = { | |
| 4408 "SIG0", | |
| 4409 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", | |
| 4410 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", | |
| 4411 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", | |
| 4412 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", | |
| 4413 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", | |
| 4414 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", | |
| 4415 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", | |
| 4416 "SIGCANCEL", "SIGLOST" | |
| 4417 }; | |
| 4418 | |
| 4419 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
| 4420 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
| 4421 // signal | |
| 4422 if (exception_code < sizeof(signames)/sizeof(const char*)) { | |
| 4423 jio_snprintf(buf, size, "%s", signames[exception_code]); | |
| 4424 } else { | |
| 4425 jio_snprintf(buf, size, "SIG%d", exception_code); | |
| 4426 } | |
| 4427 return buf; | |
| 4428 } else { | |
| 4429 return NULL; | |
| 4430 } | |
| 4431 } | |
| 4432 | |
| 4433 // (Static) wrappers for the new libthread API | |
| 4434 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; | |
| 4435 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; | |
| 4436 int_fnP_thread_t_i os::Solaris::_thr_setmutator; | |
| 4437 int_fnP_thread_t os::Solaris::_thr_suspend_mutator; | |
| 4438 int_fnP_thread_t os::Solaris::_thr_continue_mutator; | |
| 4439 | |
| 4440 // (Static) wrappers for the liblgrp API | |
| 4441 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; | |
| 4442 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; | |
| 4443 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; | |
| 4444 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; | |
| 4445 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; | |
|
144
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6697534: Premature GC and invalid lgrp selection with NUMA-aware allocator.
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parents:
141
diff
changeset
|
4446 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; |
| 0 | 4447 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; |
| 4448 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; | |
| 4449 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; | |
| 4450 | |
| 4451 // (Static) wrapper for meminfo() call. | |
| 4452 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; | |
| 4453 | |
| 4454 static address resolve_symbol(const char *name) { | |
| 4455 address addr; | |
| 4456 | |
| 4457 addr = (address) dlsym(RTLD_DEFAULT, name); | |
| 4458 if(addr == NULL) { | |
| 4459 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 | |
| 4460 addr = (address) dlsym(RTLD_NEXT, name); | |
| 4461 if(addr == NULL) { | |
| 4462 fatal(dlerror()); | |
| 4463 } | |
| 4464 } | |
| 4465 return addr; | |
| 4466 } | |
| 4467 | |
| 4468 | |
| 4469 | |
| 4470 // isT2_libthread() | |
| 4471 // | |
| 4472 // Routine to determine if we are currently using the new T2 libthread. | |
| 4473 // | |
| 4474 // We determine if we are using T2 by reading /proc/self/lstatus and | |
| 4475 // looking for a thread with the ASLWP bit set. If we find this status | |
| 4476 // bit set, we must assume that we are NOT using T2. The T2 team | |
| 4477 // has approved this algorithm. | |
| 4478 // | |
| 4479 // We need to determine if we are running with the new T2 libthread | |
| 4480 // since setting native thread priorities is handled differently | |
| 4481 // when using this library. All threads created using T2 are bound | |
| 4482 // threads. Calling thr_setprio is meaningless in this case. | |
| 4483 // | |
| 4484 bool isT2_libthread() { | |
| 4485 static prheader_t * lwpArray = NULL; | |
| 4486 static int lwpSize = 0; | |
| 4487 static int lwpFile = -1; | |
| 4488 lwpstatus_t * that; | |
| 4489 char lwpName [128]; | |
| 4490 bool isT2 = false; | |
| 4491 | |
| 4492 #define ADR(x) ((uintptr_t)(x)) | |
| 4493 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) | |
| 4494 | |
|
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|
4495 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); |
|
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|
4496 if (lwpFile < 0) { |
|
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|
4497 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); |
|
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|
4498 return false; |
|
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|
4499 } |
| 0 | 4500 lwpSize = 16*1024; |
| 4501 for (;;) { | |
| 4502 lseek (lwpFile, 0, SEEK_SET); | |
|
89
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|
4503 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); |
|
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|
4504 if (read(lwpFile, lwpArray, lwpSize) < 0) { |
|
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|
4505 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); |
| 0 | 4506 break; |
| 4507 } | |
|
89
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|
4508 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { |
|
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|
4509 // We got a good snapshot - now iterate over the list. |
|
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79
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|
4510 int aslwpcount = 0; |
|
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|
4511 for (int i = 0; i < lwpArray->pr_nent; i++ ) { |
|
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|
4512 that = LWPINDEX(lwpArray,i); |
|
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79
diff
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|
4513 if (that->pr_flags & PR_ASLWP) { |
|
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79
diff
changeset
|
4514 aslwpcount++; |
|
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diff
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|
4515 } |
|
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diff
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|
4516 } |
|
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|
4517 if (aslwpcount == 0) isT2 = true; |
|
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|
4518 break; |
| 0 | 4519 } |
|
89
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|
4520 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; |
|
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|
4521 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. |
|
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|
4522 } |
| 0 | 4523 |
| 4524 FREE_C_HEAP_ARRAY(char, lwpArray); | |
| 4525 close (lwpFile); | |
|
89
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|
4526 if (ThreadPriorityVerbose) { |
|
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|
4527 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); |
| 0 | 4528 else tty->print_cr("We are not running with a T2 libthread\n"); |
| 4529 } | |
|
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|
4530 return isT2; |
| 0 | 4531 } |
| 4532 | |
| 4533 | |
| 4534 void os::Solaris::libthread_init() { | |
| 4535 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); | |
| 4536 | |
| 4537 // Determine if we are running with the new T2 libthread | |
| 4538 os::Solaris::set_T2_libthread(isT2_libthread()); | |
| 4539 | |
| 4540 lwp_priocntl_init(); | |
| 4541 | |
| 4542 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 | |
| 4543 if(func == NULL) { | |
| 4544 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); | |
| 4545 // Guarantee that this VM is running on an new enough OS (5.6 or | |
| 4546 // later) that it will have a new enough libthread.so. | |
| 4547 guarantee(func != NULL, "libthread.so is too old."); | |
| 4548 } | |
| 4549 | |
| 4550 // Initialize the new libthread getstate API wrappers | |
| 4551 func = resolve_symbol("thr_getstate"); | |
| 4552 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); | |
| 4553 | |
| 4554 func = resolve_symbol("thr_setstate"); | |
| 4555 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); | |
| 4556 | |
| 4557 func = resolve_symbol("thr_setmutator"); | |
| 4558 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); | |
| 4559 | |
| 4560 func = resolve_symbol("thr_suspend_mutator"); | |
| 4561 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); | |
| 4562 | |
| 4563 func = resolve_symbol("thr_continue_mutator"); | |
| 4564 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); | |
| 4565 | |
| 4566 int size; | |
| 4567 void (*handler_info_func)(address *, int *); | |
| 4568 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); | |
| 4569 handler_info_func(&handler_start, &size); | |
| 4570 handler_end = handler_start + size; | |
| 4571 } | |
| 4572 | |
| 4573 | |
| 4574 int_fnP_mutex_tP os::Solaris::_mutex_lock; | |
| 4575 int_fnP_mutex_tP os::Solaris::_mutex_trylock; | |
| 4576 int_fnP_mutex_tP os::Solaris::_mutex_unlock; | |
| 4577 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; | |
| 4578 int_fnP_mutex_tP os::Solaris::_mutex_destroy; | |
| 4579 int os::Solaris::_mutex_scope = USYNC_THREAD; | |
| 4580 | |
| 4581 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; | |
| 4582 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; | |
| 4583 int_fnP_cond_tP os::Solaris::_cond_signal; | |
| 4584 int_fnP_cond_tP os::Solaris::_cond_broadcast; | |
| 4585 int_fnP_cond_tP_i_vP os::Solaris::_cond_init; | |
| 4586 int_fnP_cond_tP os::Solaris::_cond_destroy; | |
| 4587 int os::Solaris::_cond_scope = USYNC_THREAD; | |
| 4588 | |
| 4589 void os::Solaris::synchronization_init() { | |
| 4590 if(UseLWPSynchronization) { | |
| 4591 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); | |
| 4592 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); | |
| 4593 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); | |
| 4594 os::Solaris::set_mutex_init(lwp_mutex_init); | |
| 4595 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); | |
| 4596 os::Solaris::set_mutex_scope(USYNC_THREAD); | |
| 4597 | |
| 4598 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); | |
| 4599 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); | |
| 4600 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); | |
| 4601 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); | |
| 4602 os::Solaris::set_cond_init(lwp_cond_init); | |
| 4603 os::Solaris::set_cond_destroy(lwp_cond_destroy); | |
| 4604 os::Solaris::set_cond_scope(USYNC_THREAD); | |
| 4605 } | |
| 4606 else { | |
| 4607 os::Solaris::set_mutex_scope(USYNC_THREAD); | |
| 4608 os::Solaris::set_cond_scope(USYNC_THREAD); | |
| 4609 | |
| 4610 if(UsePthreads) { | |
| 4611 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); | |
| 4612 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); | |
| 4613 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); | |
| 4614 os::Solaris::set_mutex_init(pthread_mutex_default_init); | |
| 4615 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); | |
| 4616 | |
| 4617 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); | |
| 4618 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); | |
| 4619 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); | |
| 4620 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); | |
| 4621 os::Solaris::set_cond_init(pthread_cond_default_init); | |
| 4622 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); | |
| 4623 } | |
| 4624 else { | |
| 4625 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); | |
| 4626 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); | |
| 4627 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); | |
| 4628 os::Solaris::set_mutex_init(::mutex_init); | |
| 4629 os::Solaris::set_mutex_destroy(::mutex_destroy); | |
| 4630 | |
| 4631 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); | |
| 4632 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); | |
| 4633 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); | |
| 4634 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); | |
| 4635 os::Solaris::set_cond_init(::cond_init); | |
| 4636 os::Solaris::set_cond_destroy(::cond_destroy); | |
| 4637 } | |
| 4638 } | |
| 4639 } | |
| 4640 | |
|
462
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439
diff
changeset
|
4641 bool os::Solaris::liblgrp_init() { |
|
267
9d6a3a6891f8
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144
diff
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|
4642 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); |
| 0 | 4643 if (handle != NULL) { |
| 4644 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); | |
| 4645 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); | |
| 4646 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); | |
| 4647 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); | |
| 4648 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); | |
|
144
e3729351c946
6697534: Premature GC and invalid lgrp selection with NUMA-aware allocator.
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diff
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|
4649 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); |
| 0 | 4650 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); |
| 4651 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, | |
| 4652 dlsym(handle, "lgrp_cookie_stale"))); | |
| 4653 | |
| 4654 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); | |
| 4655 set_lgrp_cookie(c); | |
|
462
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439
diff
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|
4656 return true; |
|
85f1b9537f70
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439
diff
changeset
|
4657 } |
|
85f1b9537f70
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439
diff
changeset
|
4658 return false; |
| 0 | 4659 } |
| 4660 | |
| 4661 void os::Solaris::misc_sym_init() { | |
| 4662 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); | |
| 4663 if(func == NULL) { | |
| 4664 func = (address) dlsym(RTLD_NEXT, "meminfo"); | |
| 4665 } | |
| 4666 if (func != NULL) { | |
| 4667 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); | |
| 4668 } | |
| 4669 } | |
| 4670 | |
| 4671 // Symbol doesn't exist in Solaris 8 pset.h | |
| 4672 #ifndef PS_MYID | |
| 4673 #define PS_MYID -3 | |
| 4674 #endif | |
| 4675 | |
| 4676 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); | |
| 4677 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); | |
| 4678 static pset_getloadavg_type pset_getloadavg_ptr = NULL; | |
| 4679 | |
| 4680 void init_pset_getloadavg_ptr(void) { | |
| 4681 pset_getloadavg_ptr = | |
| 4682 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); | |
| 4683 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { | |
| 4684 warning("pset_getloadavg function not found"); | |
| 4685 } | |
| 4686 } | |
| 4687 | |
| 4688 int os::Solaris::_dev_zero_fd = -1; | |
| 4689 | |
| 4690 // this is called _before_ the global arguments have been parsed | |
| 4691 void os::init(void) { | |
| 4692 _initial_pid = getpid(); | |
| 4693 | |
| 4694 max_hrtime = first_hrtime = gethrtime(); | |
| 4695 | |
| 4696 init_random(1234567); | |
| 4697 | |
| 4698 page_size = sysconf(_SC_PAGESIZE); | |
| 4699 if (page_size == -1) | |
| 4700 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); | |
| 4701 init_page_sizes((size_t) page_size); | |
| 4702 | |
| 4703 Solaris::initialize_system_info(); | |
| 4704 | |
| 4705 int fd = open("/dev/zero", O_RDWR); | |
| 4706 if (fd < 0) { | |
| 4707 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); | |
| 4708 } else { | |
| 4709 Solaris::set_dev_zero_fd(fd); | |
| 4710 | |
| 4711 // Close on exec, child won't inherit. | |
| 4712 fcntl(fd, F_SETFD, FD_CLOEXEC); | |
| 4713 } | |
| 4714 | |
| 4715 clock_tics_per_sec = CLK_TCK; | |
| 4716 | |
| 4717 // check if dladdr1() exists; dladdr1 can provide more information than | |
| 4718 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 | |
| 4719 // and is available on linker patches for 5.7 and 5.8. | |
| 4720 // libdl.so must have been loaded, this call is just an entry lookup | |
| 4721 void * hdl = dlopen("libdl.so", RTLD_NOW); | |
| 4722 if (hdl) | |
| 4723 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); | |
| 4724 | |
| 4725 // (Solaris only) this switches to calls that actually do locking. | |
| 4726 ThreadCritical::initialize(); | |
| 4727 | |
| 4728 main_thread = thr_self(); | |
| 4729 | |
| 4730 // Constant minimum stack size allowed. It must be at least | |
| 4731 // the minimum of what the OS supports (thr_min_stack()), and | |
| 4732 // enough to allow the thread to get to user bytecode execution. | |
| 4733 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); | |
| 4734 // If the pagesize of the VM is greater than 8K determine the appropriate | |
| 4735 // number of initial guard pages. The user can change this with the | |
| 4736 // command line arguments, if needed. | |
| 4737 if (vm_page_size() > 8*K) { | |
| 4738 StackYellowPages = 1; | |
| 4739 StackRedPages = 1; | |
| 4740 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); | |
| 4741 } | |
| 4742 } | |
| 4743 | |
| 4744 // To install functions for atexit system call | |
| 4745 extern "C" { | |
| 4746 static void perfMemory_exit_helper() { | |
| 4747 perfMemory_exit(); | |
| 4748 } | |
| 4749 } | |
| 4750 | |
| 4751 // this is called _after_ the global arguments have been parsed | |
| 4752 jint os::init_2(void) { | |
| 4753 // try to enable extended file IO ASAP, see 6431278 | |
| 4754 os::Solaris::try_enable_extended_io(); | |
| 4755 | |
| 4756 // Allocate a single page and mark it as readable for safepoint polling. Also | |
| 4757 // use this first mmap call to check support for MAP_ALIGN. | |
| 4758 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, | |
| 4759 page_size, | |
| 4760 MAP_PRIVATE | MAP_ALIGN, | |
| 4761 PROT_READ); | |
| 4762 if (polling_page == NULL) { | |
| 4763 has_map_align = false; | |
| 4764 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, | |
| 4765 PROT_READ); | |
| 4766 } | |
| 4767 | |
| 4768 os::set_polling_page(polling_page); | |
| 4769 | |
| 4770 #ifndef PRODUCT | |
| 4771 if( Verbose && PrintMiscellaneous ) | |
| 4772 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
| 4773 #endif | |
| 4774 | |
| 4775 if (!UseMembar) { | |
| 4776 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); | |
| 4777 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); | |
| 4778 os::set_memory_serialize_page( mem_serialize_page ); | |
| 4779 | |
| 4780 #ifndef PRODUCT | |
| 4781 if(Verbose && PrintMiscellaneous) | |
| 4782 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
| 4783 #endif | |
| 4784 } | |
| 4785 | |
| 4786 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); | |
| 4787 | |
| 4788 // Check minimum allowable stack size for thread creation and to initialize | |
| 4789 // the java system classes, including StackOverflowError - depends on page | |
| 4790 // size. Add a page for compiler2 recursion in main thread. | |
| 4791 // Add in BytesPerWord times page size to account for VM stack during | |
| 4792 // class initialization depending on 32 or 64 bit VM. | |
| 4793 guarantee((Solaris::min_stack_allowed >= | |
| 4794 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord | |
| 4795 COMPILER2_PRESENT(+1)) * page_size), | |
| 4796 "need to increase Solaris::min_stack_allowed on this platform"); | |
| 4797 | |
| 4798 size_t threadStackSizeInBytes = ThreadStackSize * K; | |
| 4799 if (threadStackSizeInBytes != 0 && | |
| 4800 threadStackSizeInBytes < Solaris::min_stack_allowed) { | |
| 4801 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", | |
| 4802 Solaris::min_stack_allowed/K); | |
| 4803 return JNI_ERR; | |
| 4804 } | |
| 4805 | |
| 4806 // For 64kbps there will be a 64kb page size, which makes | |
| 4807 // the usable default stack size quite a bit less. Increase the | |
| 4808 // stack for 64kb (or any > than 8kb) pages, this increases | |
| 4809 // virtual memory fragmentation (since we're not creating the | |
| 4810 // stack on a power of 2 boundary. The real fix for this | |
| 4811 // should be to fix the guard page mechanism. | |
| 4812 | |
| 4813 if (vm_page_size() > 8*K) { | |
| 4814 threadStackSizeInBytes = (threadStackSizeInBytes != 0) | |
| 4815 ? threadStackSizeInBytes + | |
| 4816 ((StackYellowPages + StackRedPages) * vm_page_size()) | |
| 4817 : 0; | |
| 4818 ThreadStackSize = threadStackSizeInBytes/K; | |
| 4819 } | |
| 4820 | |
| 4821 // Make the stack size a multiple of the page size so that | |
| 4822 // the yellow/red zones can be guarded. | |
| 4823 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
| 4824 vm_page_size())); | |
| 4825 | |
| 4826 Solaris::libthread_init(); | |
|
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4827 |
| 0 | 4828 if (UseNUMA) { |
|
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4829 if (!Solaris::liblgrp_init()) { |
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4830 UseNUMA = false; |
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4831 } else { |
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4832 size_t lgrp_limit = os::numa_get_groups_num(); |
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4833 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit); |
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4834 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); |
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4835 FREE_C_HEAP_ARRAY(int, lgrp_ids); |
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4836 if (lgrp_num < 2) { |
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4837 // There's only one locality group, disable NUMA. |
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4838 UseNUMA = false; |
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4839 } |
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4840 } |
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4841 if (!UseNUMA && ForceNUMA) { |
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4842 UseNUMA = true; |
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4843 } |
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4844 } |
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4845 |
| 0 | 4846 Solaris::misc_sym_init(); |
| 4847 Solaris::signal_sets_init(); | |
| 4848 Solaris::init_signal_mem(); | |
| 4849 Solaris::install_signal_handlers(); | |
| 4850 | |
| 4851 if (libjsigversion < JSIG_VERSION_1_4_1) { | |
| 4852 Maxlibjsigsigs = OLDMAXSIGNUM; | |
| 4853 } | |
| 4854 | |
| 4855 // initialize synchronization primitives to use either thread or | |
| 4856 // lwp synchronization (controlled by UseLWPSynchronization) | |
| 4857 Solaris::synchronization_init(); | |
| 4858 | |
| 4859 if (MaxFDLimit) { | |
| 4860 // set the number of file descriptors to max. print out error | |
| 4861 // if getrlimit/setrlimit fails but continue regardless. | |
| 4862 struct rlimit nbr_files; | |
| 4863 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4864 if (status != 0) { | |
| 4865 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4866 perror("os::init_2 getrlimit failed"); | |
| 4867 } else { | |
| 4868 nbr_files.rlim_cur = nbr_files.rlim_max; | |
| 4869 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4870 if (status != 0) { | |
| 4871 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4872 perror("os::init_2 setrlimit failed"); | |
| 4873 } | |
| 4874 } | |
| 4875 } | |
| 4876 | |
| 4877 // Initialize HPI. | |
| 4878 jint hpi_result = hpi::initialize(); | |
| 4879 if (hpi_result != JNI_OK) { | |
| 4880 tty->print_cr("There was an error trying to initialize the HPI library."); | |
| 4881 return hpi_result; | |
| 4882 } | |
| 4883 | |
| 4884 // Calculate theoretical max. size of Threads to guard gainst | |
| 4885 // artifical out-of-memory situations, where all available address- | |
| 4886 // space has been reserved by thread stacks. Default stack size is 1Mb. | |
| 4887 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? | |
| 4888 JavaThread::stack_size_at_create() : (1*K*K); | |
| 4889 assert(pre_thread_stack_size != 0, "Must have a stack"); | |
| 4890 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when | |
| 4891 // we should start doing Virtual Memory banging. Currently when the threads will | |
| 4892 // have used all but 200Mb of space. | |
| 4893 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); | |
| 4894 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; | |
| 4895 | |
| 4896 // at-exit methods are called in the reverse order of their registration. | |
| 4897 // In Solaris 7 and earlier, atexit functions are called on return from | |
| 4898 // main or as a result of a call to exit(3C). There can be only 32 of | |
| 4899 // these functions registered and atexit() does not set errno. In Solaris | |
| 4900 // 8 and later, there is no limit to the number of functions registered | |
| 4901 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit | |
| 4902 // functions are called upon dlclose(3DL) in addition to return from main | |
| 4903 // and exit(3C). | |
| 4904 | |
| 4905 if (PerfAllowAtExitRegistration) { | |
| 4906 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
| 4907 // atexit functions can be delayed until process exit time, which | |
| 4908 // can be problematic for embedded VM situations. Embedded VMs should | |
| 4909 // call DestroyJavaVM() to assure that VM resources are released. | |
| 4910 | |
| 4911 // note: perfMemory_exit_helper atexit function may be removed in | |
| 4912 // the future if the appropriate cleanup code can be added to the | |
| 4913 // VM_Exit VMOperation's doit method. | |
| 4914 if (atexit(perfMemory_exit_helper) != 0) { | |
| 4915 warning("os::init2 atexit(perfMemory_exit_helper) failed"); | |
| 4916 } | |
| 4917 } | |
| 4918 | |
| 4919 // Init pset_loadavg function pointer | |
| 4920 init_pset_getloadavg_ptr(); | |
| 4921 | |
| 4922 return JNI_OK; | |
| 4923 } | |
| 4924 | |
| 4925 | |
| 4926 // Mark the polling page as unreadable | |
| 4927 void os::make_polling_page_unreadable(void) { | |
| 4928 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) | |
| 4929 fatal("Could not disable polling page"); | |
| 4930 }; | |
| 4931 | |
| 4932 // Mark the polling page as readable | |
| 4933 void os::make_polling_page_readable(void) { | |
| 4934 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) | |
| 4935 fatal("Could not enable polling page"); | |
| 4936 }; | |
| 4937 | |
| 4938 // OS interface. | |
| 4939 | |
| 4940 int os::stat(const char *path, struct stat *sbuf) { | |
| 4941 char pathbuf[MAX_PATH]; | |
| 4942 if (strlen(path) > MAX_PATH - 1) { | |
| 4943 errno = ENAMETOOLONG; | |
| 4944 return -1; | |
| 4945 } | |
| 4946 hpi::native_path(strcpy(pathbuf, path)); | |
| 4947 return ::stat(pathbuf, sbuf); | |
| 4948 } | |
| 4949 | |
| 4950 | |
| 4951 bool os::check_heap(bool force) { return true; } | |
| 4952 | |
| 4953 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); | |
| 4954 static vsnprintf_t sol_vsnprintf = NULL; | |
| 4955 | |
| 4956 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { | |
| 4957 if (!sol_vsnprintf) { | |
| 4958 //search for the named symbol in the objects that were loaded after libjvm | |
| 4959 void* where = RTLD_NEXT; | |
| 4960 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) | |
| 4961 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); | |
| 4962 if (!sol_vsnprintf){ | |
| 4963 //search for the named symbol in the objects that were loaded before libjvm | |
| 4964 where = RTLD_DEFAULT; | |
| 4965 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) | |
| 4966 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); | |
| 4967 assert(sol_vsnprintf != NULL, "vsnprintf not found"); | |
| 4968 } | |
| 4969 } | |
| 4970 return (*sol_vsnprintf)(buf, count, fmt, argptr); | |
| 4971 } | |
| 4972 | |
| 4973 | |
| 4974 // Is a (classpath) directory empty? | |
| 4975 bool os::dir_is_empty(const char* path) { | |
| 4976 DIR *dir = NULL; | |
| 4977 struct dirent *ptr; | |
| 4978 | |
| 4979 dir = opendir(path); | |
| 4980 if (dir == NULL) return true; | |
| 4981 | |
| 4982 /* Scan the directory */ | |
| 4983 bool result = true; | |
| 4984 char buf[sizeof(struct dirent) + MAX_PATH]; | |
| 4985 struct dirent *dbuf = (struct dirent *) buf; | |
| 4986 while (result && (ptr = readdir(dir, dbuf)) != NULL) { | |
| 4987 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
| 4988 result = false; | |
| 4989 } | |
| 4990 } | |
| 4991 closedir(dir); | |
| 4992 return result; | |
| 4993 } | |
| 4994 | |
| 4995 // create binary file, rewriting existing file if required | |
| 4996 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
| 4997 int oflags = O_WRONLY | O_CREAT; | |
| 4998 if (!rewrite_existing) { | |
| 4999 oflags |= O_EXCL; | |
| 5000 } | |
| 5001 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
| 5002 } | |
| 5003 | |
| 5004 // return current position of file pointer | |
| 5005 jlong os::current_file_offset(int fd) { | |
| 5006 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
| 5007 } | |
| 5008 | |
| 5009 // move file pointer to the specified offset | |
| 5010 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
| 5011 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
| 5012 } | |
| 5013 | |
| 5014 // Map a block of memory. | |
| 5015 char* os::map_memory(int fd, const char* file_name, size_t file_offset, | |
| 5016 char *addr, size_t bytes, bool read_only, | |
| 5017 bool allow_exec) { | |
| 5018 int prot; | |
| 5019 int flags; | |
| 5020 | |
| 5021 if (read_only) { | |
| 5022 prot = PROT_READ; | |
| 5023 flags = MAP_SHARED; | |
| 5024 } else { | |
| 5025 prot = PROT_READ | PROT_WRITE; | |
| 5026 flags = MAP_PRIVATE; | |
| 5027 } | |
| 5028 | |
| 5029 if (allow_exec) { | |
| 5030 prot |= PROT_EXEC; | |
| 5031 } | |
| 5032 | |
| 5033 if (addr != NULL) { | |
| 5034 flags |= MAP_FIXED; | |
| 5035 } | |
| 5036 | |
| 5037 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
| 5038 fd, file_offset); | |
| 5039 if (mapped_address == MAP_FAILED) { | |
| 5040 return NULL; | |
| 5041 } | |
| 5042 return mapped_address; | |
| 5043 } | |
| 5044 | |
| 5045 | |
| 5046 // Remap a block of memory. | |
| 5047 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, | |
| 5048 char *addr, size_t bytes, bool read_only, | |
| 5049 bool allow_exec) { | |
| 5050 // same as map_memory() on this OS | |
| 5051 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
| 5052 allow_exec); | |
| 5053 } | |
| 5054 | |
| 5055 | |
| 5056 // Unmap a block of memory. | |
| 5057 bool os::unmap_memory(char* addr, size_t bytes) { | |
| 5058 return munmap(addr, bytes) == 0; | |
| 5059 } | |
| 5060 | |
| 5061 void os::pause() { | |
| 5062 char filename[MAX_PATH]; | |
| 5063 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
| 5064 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
| 5065 } else { | |
| 5066 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
| 5067 } | |
| 5068 | |
| 5069 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
| 5070 if (fd != -1) { | |
| 5071 struct stat buf; | |
| 5072 close(fd); | |
| 5073 while (::stat(filename, &buf) == 0) { | |
| 5074 (void)::poll(NULL, 0, 100); | |
| 5075 } | |
| 5076 } else { | |
| 5077 jio_fprintf(stderr, | |
| 5078 "Could not open pause file '%s', continuing immediately.\n", filename); | |
| 5079 } | |
| 5080 } | |
| 5081 | |
| 5082 #ifndef PRODUCT | |
| 5083 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS | |
| 5084 // Turn this on if you need to trace synch operations. | |
| 5085 // Set RECORD_SYNCH_LIMIT to a large-enough value, | |
| 5086 // and call record_synch_enable and record_synch_disable | |
| 5087 // around the computation of interest. | |
| 5088 | |
| 5089 void record_synch(char* name, bool returning); // defined below | |
| 5090 | |
| 5091 class RecordSynch { | |
| 5092 char* _name; | |
| 5093 public: | |
| 5094 RecordSynch(char* name) :_name(name) | |
| 5095 { record_synch(_name, false); } | |
| 5096 ~RecordSynch() { record_synch(_name, true); } | |
| 5097 }; | |
| 5098 | |
| 5099 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \ | |
| 5100 extern "C" ret name params { \ | |
| 5101 typedef ret name##_t params; \ | |
| 5102 static name##_t* implem = NULL; \ | |
| 5103 static int callcount = 0; \ | |
| 5104 if (implem == NULL) { \ | |
| 5105 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ | |
| 5106 if (implem == NULL) fatal(dlerror()); \ | |
| 5107 } \ | |
| 5108 ++callcount; \ | |
| 5109 RecordSynch _rs(#name); \ | |
| 5110 inner; \ | |
| 5111 return implem args; \ | |
| 5112 } | |
| 5113 // in dbx, examine callcounts this way: | |
| 5114 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done | |
| 5115 | |
| 5116 #define CHECK_POINTER_OK(p) \ | |
| 5117 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) | |
| 5118 #define CHECK_MU \ | |
| 5119 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); | |
| 5120 #define CHECK_CV \ | |
| 5121 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); | |
| 5122 #define CHECK_P(p) \ | |
| 5123 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); | |
| 5124 | |
| 5125 #define CHECK_MUTEX(mutex_op) \ | |
| 5126 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); | |
| 5127 | |
| 5128 CHECK_MUTEX( mutex_lock) | |
| 5129 CHECK_MUTEX( _mutex_lock) | |
| 5130 CHECK_MUTEX( mutex_unlock) | |
| 5131 CHECK_MUTEX(_mutex_unlock) | |
| 5132 CHECK_MUTEX( mutex_trylock) | |
| 5133 CHECK_MUTEX(_mutex_trylock) | |
| 5134 | |
| 5135 #define CHECK_COND(cond_op) \ | |
| 5136 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); | |
| 5137 | |
| 5138 CHECK_COND( cond_wait); | |
| 5139 CHECK_COND(_cond_wait); | |
| 5140 CHECK_COND(_cond_wait_cancel); | |
| 5141 | |
| 5142 #define CHECK_COND2(cond_op) \ | |
| 5143 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); | |
| 5144 | |
| 5145 CHECK_COND2( cond_timedwait); | |
| 5146 CHECK_COND2(_cond_timedwait); | |
| 5147 CHECK_COND2(_cond_timedwait_cancel); | |
| 5148 | |
| 5149 // do the _lwp_* versions too | |
| 5150 #define mutex_t lwp_mutex_t | |
| 5151 #define cond_t lwp_cond_t | |
| 5152 CHECK_MUTEX( _lwp_mutex_lock) | |
| 5153 CHECK_MUTEX( _lwp_mutex_unlock) | |
| 5154 CHECK_MUTEX( _lwp_mutex_trylock) | |
| 5155 CHECK_MUTEX( __lwp_mutex_lock) | |
| 5156 CHECK_MUTEX( __lwp_mutex_unlock) | |
| 5157 CHECK_MUTEX( __lwp_mutex_trylock) | |
| 5158 CHECK_MUTEX(___lwp_mutex_lock) | |
| 5159 CHECK_MUTEX(___lwp_mutex_unlock) | |
| 5160 | |
| 5161 CHECK_COND( _lwp_cond_wait); | |
| 5162 CHECK_COND( __lwp_cond_wait); | |
| 5163 CHECK_COND(___lwp_cond_wait); | |
| 5164 | |
| 5165 CHECK_COND2( _lwp_cond_timedwait); | |
| 5166 CHECK_COND2( __lwp_cond_timedwait); | |
| 5167 #undef mutex_t | |
| 5168 #undef cond_t | |
| 5169 | |
| 5170 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); | |
| 5171 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); | |
| 5172 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); | |
| 5173 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); | |
| 5174 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); | |
| 5175 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); | |
| 5176 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); | |
| 5177 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); | |
| 5178 | |
| 5179 | |
| 5180 // recording machinery: | |
| 5181 | |
| 5182 enum { RECORD_SYNCH_LIMIT = 200 }; | |
| 5183 char* record_synch_name[RECORD_SYNCH_LIMIT]; | |
| 5184 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; | |
| 5185 bool record_synch_returning[RECORD_SYNCH_LIMIT]; | |
| 5186 thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; | |
| 5187 int record_synch_count = 0; | |
| 5188 bool record_synch_enabled = false; | |
| 5189 | |
| 5190 // in dbx, examine recorded data this way: | |
| 5191 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done | |
| 5192 | |
| 5193 void record_synch(char* name, bool returning) { | |
| 5194 if (record_synch_enabled) { | |
| 5195 if (record_synch_count < RECORD_SYNCH_LIMIT) { | |
| 5196 record_synch_name[record_synch_count] = name; | |
| 5197 record_synch_returning[record_synch_count] = returning; | |
| 5198 record_synch_thread[record_synch_count] = thr_self(); | |
| 5199 record_synch_arg0ptr[record_synch_count] = &name; | |
| 5200 record_synch_count++; | |
| 5201 } | |
| 5202 // put more checking code here: | |
| 5203 // ... | |
| 5204 } | |
| 5205 } | |
| 5206 | |
| 5207 void record_synch_enable() { | |
| 5208 // start collecting trace data, if not already doing so | |
| 5209 if (!record_synch_enabled) record_synch_count = 0; | |
| 5210 record_synch_enabled = true; | |
| 5211 } | |
| 5212 | |
| 5213 void record_synch_disable() { | |
| 5214 // stop collecting trace data | |
| 5215 record_synch_enabled = false; | |
| 5216 } | |
| 5217 | |
| 5218 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS | |
| 5219 #endif // PRODUCT | |
| 5220 | |
| 5221 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); | |
| 5222 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - | |
| 5223 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); | |
| 5224 | |
| 5225 | |
| 5226 // JVMTI & JVM monitoring and management support | |
| 5227 // The thread_cpu_time() and current_thread_cpu_time() are only | |
| 5228 // supported if is_thread_cpu_time_supported() returns true. | |
| 5229 // They are not supported on Solaris T1. | |
| 5230 | |
| 5231 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
| 5232 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
| 5233 // of a thread. | |
| 5234 // | |
| 5235 // current_thread_cpu_time() and thread_cpu_time(Thread *) | |
| 5236 // returns the fast estimate available on the platform. | |
| 5237 | |
| 5238 // hrtime_t gethrvtime() return value includes | |
| 5239 // user time but does not include system time | |
| 5240 jlong os::current_thread_cpu_time() { | |
| 5241 return (jlong) gethrvtime(); | |
| 5242 } | |
| 5243 | |
| 5244 jlong os::thread_cpu_time(Thread *thread) { | |
| 5245 // return user level CPU time only to be consistent with | |
| 5246 // what current_thread_cpu_time returns. | |
| 5247 // thread_cpu_time_info() must be changed if this changes | |
| 5248 return os::thread_cpu_time(thread, false /* user time only */); | |
| 5249 } | |
| 5250 | |
| 5251 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
| 5252 if (user_sys_cpu_time) { | |
| 5253 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
| 5254 } else { | |
| 5255 return os::current_thread_cpu_time(); | |
| 5256 } | |
| 5257 } | |
| 5258 | |
| 5259 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 5260 char proc_name[64]; | |
| 5261 int count; | |
| 5262 prusage_t prusage; | |
| 5263 jlong lwp_time; | |
| 5264 int fd; | |
| 5265 | |
| 5266 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", | |
| 5267 getpid(), | |
| 5268 thread->osthread()->lwp_id()); | |
| 5269 fd = open(proc_name, O_RDONLY); | |
| 5270 if ( fd == -1 ) return -1; | |
| 5271 | |
| 5272 do { | |
| 5273 count = pread(fd, | |
| 5274 (void *)&prusage.pr_utime, | |
| 5275 thr_time_size, | |
| 5276 thr_time_off); | |
| 5277 } while (count < 0 && errno == EINTR); | |
| 5278 close(fd); | |
| 5279 if ( count < 0 ) return -1; | |
| 5280 | |
| 5281 if (user_sys_cpu_time) { | |
| 5282 // user + system CPU time | |
| 5283 lwp_time = (((jlong)prusage.pr_stime.tv_sec + | |
| 5284 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + | |
| 5285 (jlong)prusage.pr_stime.tv_nsec + | |
| 5286 (jlong)prusage.pr_utime.tv_nsec; | |
| 5287 } else { | |
| 5288 // user level CPU time only | |
| 5289 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + | |
| 5290 (jlong)prusage.pr_utime.tv_nsec; | |
| 5291 } | |
| 5292 | |
| 5293 return(lwp_time); | |
| 5294 } | |
| 5295 | |
| 5296 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5297 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5298 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5299 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5300 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned | |
| 5301 } | |
| 5302 | |
| 5303 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5304 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5305 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5306 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5307 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned | |
| 5308 } | |
| 5309 | |
| 5310 bool os::is_thread_cpu_time_supported() { | |
| 5311 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { | |
| 5312 return true; | |
| 5313 } else { | |
| 5314 return false; | |
| 5315 } | |
| 5316 } | |
| 5317 | |
| 5318 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 5319 // Return the load average for our processor set if the primitive exists | |
| 5320 // (Solaris 9 and later). Otherwise just return system wide loadavg. | |
| 5321 int os::loadavg(double loadavg[], int nelem) { | |
| 5322 if (pset_getloadavg_ptr != NULL) { | |
| 5323 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); | |
| 5324 } else { | |
| 5325 return ::getloadavg(loadavg, nelem); | |
| 5326 } | |
| 5327 } | |
| 5328 | |
| 5329 //--------------------------------------------------------------------------------- | |
| 5330 #ifndef PRODUCT | |
| 5331 | |
| 5332 static address same_page(address x, address y) { | |
| 5333 intptr_t page_bits = -os::vm_page_size(); | |
| 5334 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) | |
| 5335 return x; | |
| 5336 else if (x > y) | |
| 5337 return (address)(intptr_t(y) | ~page_bits) + 1; | |
| 5338 else | |
| 5339 return (address)(intptr_t(y) & page_bits); | |
| 5340 } | |
| 5341 | |
| 5342 bool os::find(address addr) { | |
| 5343 Dl_info dlinfo; | |
| 5344 memset(&dlinfo, 0, sizeof(dlinfo)); | |
| 5345 if (dladdr(addr, &dlinfo)) { | |
| 5346 #ifdef _LP64 | |
| 5347 tty->print("0x%016lx: ", addr); | |
| 5348 #else | |
| 5349 tty->print("0x%08x: ", addr); | |
| 5350 #endif | |
| 5351 if (dlinfo.dli_sname != NULL) | |
| 5352 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); | |
| 5353 else if (dlinfo.dli_fname) | |
| 5354 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); | |
| 5355 else | |
| 5356 tty->print("<absolute address>"); | |
| 5357 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); | |
| 5358 #ifdef _LP64 | |
| 5359 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); | |
| 5360 #else | |
| 5361 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); | |
| 5362 #endif | |
| 5363 tty->cr(); | |
| 5364 | |
| 5365 if (Verbose) { | |
| 5366 // decode some bytes around the PC | |
| 5367 address begin = same_page(addr-40, addr); | |
| 5368 address end = same_page(addr+40, addr); | |
| 5369 address lowest = (address) dlinfo.dli_sname; | |
| 5370 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
| 5371 if (begin < lowest) begin = lowest; | |
| 5372 Dl_info dlinfo2; | |
| 5373 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr | |
| 5374 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) | |
| 5375 end = (address) dlinfo2.dli_saddr; | |
| 5376 Disassembler::decode(begin, end); | |
| 5377 } | |
| 5378 return true; | |
| 5379 } | |
| 5380 return false; | |
| 5381 } | |
| 5382 | |
| 5383 #endif | |
| 5384 | |
| 5385 | |
| 5386 // Following function has been added to support HotSparc's libjvm.so running | |
| 5387 // under Solaris production JDK 1.2.2 / 1.3.0. These came from | |
| 5388 // src/solaris/hpi/native_threads in the EVM codebase. | |
| 5389 // | |
| 5390 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release | |
| 5391 // libraries and should thus be removed. We will leave it behind for a while | |
| 5392 // until we no longer want to able to run on top of 1.3.0 Solaris production | |
| 5393 // JDK. See 4341971. | |
| 5394 | |
| 5395 #define STACK_SLACK 0x800 | |
| 5396 | |
| 5397 extern "C" { | |
| 5398 intptr_t sysThreadAvailableStackWithSlack() { | |
| 5399 stack_t st; | |
| 5400 intptr_t retval, stack_top; | |
| 5401 retval = thr_stksegment(&st); | |
| 5402 assert(retval == 0, "incorrect return value from thr_stksegment"); | |
| 5403 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); | |
| 5404 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); | |
| 5405 stack_top=(intptr_t)st.ss_sp-st.ss_size; | |
| 5406 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); | |
| 5407 } | |
| 5408 } | |
| 5409 | |
| 5410 // Just to get the Kernel build to link on solaris for testing. | |
| 5411 | |
| 5412 extern "C" { | |
| 5413 class ASGCT_CallTrace; | |
| 5414 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) | |
| 5415 KERNEL_RETURN; | |
| 5416 } | |
| 5417 | |
| 5418 | |
| 5419 // ObjectMonitor park-unpark infrastructure ... | |
| 5420 // | |
| 5421 // We implement Solaris and Linux PlatformEvents with the | |
| 5422 // obvious condvar-mutex-flag triple. | |
| 5423 // Another alternative that works quite well is pipes: | |
| 5424 // Each PlatformEvent consists of a pipe-pair. | |
| 5425 // The thread associated with the PlatformEvent | |
| 5426 // calls park(), which reads from the input end of the pipe. | |
| 5427 // Unpark() writes into the other end of the pipe. | |
| 5428 // The write-side of the pipe must be set NDELAY. | |
| 5429 // Unfortunately pipes consume a large # of handles. | |
| 5430 // Native solaris lwp_park() and lwp_unpark() work nicely, too. | |
| 5431 // Using pipes for the 1st few threads might be workable, however. | |
| 5432 // | |
| 5433 // park() is permitted to return spuriously. | |
| 5434 // Callers of park() should wrap the call to park() in | |
| 5435 // an appropriate loop. A litmus test for the correct | |
| 5436 // usage of park is the following: if park() were modified | |
| 5437 // to immediately return 0 your code should still work, | |
| 5438 // albeit degenerating to a spin loop. | |
| 5439 // | |
| 5440 // An interesting optimization for park() is to use a trylock() | |
| 5441 // to attempt to acquire the mutex. If the trylock() fails | |
| 5442 // then we know that a concurrent unpark() operation is in-progress. | |
| 5443 // in that case the park() code could simply set _count to 0 | |
| 5444 // and return immediately. The subsequent park() operation *might* | |
| 5445 // return immediately. That's harmless as the caller of park() is | |
| 5446 // expected to loop. By using trylock() we will have avoided a | |
| 5447 // avoided a context switch caused by contention on the per-thread mutex. | |
| 5448 // | |
| 5449 // TODO-FIXME: | |
| 5450 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the | |
| 5451 // objectmonitor implementation. | |
| 5452 // 2. Collapse the JSR166 parker event, and the | |
| 5453 // objectmonitor ParkEvent into a single "Event" construct. | |
| 5454 // 3. In park() and unpark() add: | |
| 5455 // assert (Thread::current() == AssociatedWith). | |
| 5456 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. | |
| 5457 // 1-out-of-N park() operations will return immediately. | |
| 5458 // | |
| 5459 // _Event transitions in park() | |
| 5460 // -1 => -1 : illegal | |
| 5461 // 1 => 0 : pass - return immediately | |
| 5462 // 0 => -1 : block | |
| 5463 // | |
| 5464 // _Event serves as a restricted-range semaphore. | |
| 5465 // | |
| 5466 // Another possible encoding of _Event would be with | |
| 5467 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits. | |
| 5468 // | |
| 5469 // TODO-FIXME: add DTRACE probes for: | |
| 5470 // 1. Tx parks | |
| 5471 // 2. Ty unparks Tx | |
| 5472 // 3. Tx resumes from park | |
| 5473 | |
| 5474 | |
| 5475 // value determined through experimentation | |
| 5476 #define ROUNDINGFIX 11 | |
| 5477 | |
| 5478 // utility to compute the abstime argument to timedwait. | |
| 5479 // TODO-FIXME: switch from compute_abstime() to unpackTime(). | |
| 5480 | |
| 5481 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { | |
| 5482 // millis is the relative timeout time | |
| 5483 // abstime will be the absolute timeout time | |
| 5484 if (millis < 0) millis = 0; | |
| 5485 struct timeval now; | |
| 5486 int status = gettimeofday(&now, NULL); | |
| 5487 assert(status == 0, "gettimeofday"); | |
| 5488 jlong seconds = millis / 1000; | |
| 5489 jlong max_wait_period; | |
| 5490 | |
| 5491 if (UseLWPSynchronization) { | |
| 5492 // forward port of fix for 4275818 (not sleeping long enough) | |
| 5493 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where | |
| 5494 // _lwp_cond_timedwait() used a round_down algorithm rather | |
| 5495 // than a round_up. For millis less than our roundfactor | |
| 5496 // it rounded down to 0 which doesn't meet the spec. | |
| 5497 // For millis > roundfactor we may return a bit sooner, but | |
| 5498 // since we can not accurately identify the patch level and | |
| 5499 // this has already been fixed in Solaris 9 and 8 we will | |
| 5500 // leave it alone rather than always rounding down. | |
| 5501 | |
| 5502 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; | |
| 5503 // It appears that when we go directly through Solaris _lwp_cond_timedwait() | |
| 5504 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 | |
| 5505 max_wait_period = 21000000; | |
| 5506 } else { | |
| 5507 max_wait_period = 50000000; | |
| 5508 } | |
| 5509 millis %= 1000; | |
| 5510 if (seconds > max_wait_period) { // see man cond_timedwait(3T) | |
| 5511 seconds = max_wait_period; | |
| 5512 } | |
| 5513 abstime->tv_sec = now.tv_sec + seconds; | |
| 5514 long usec = now.tv_usec + millis * 1000; | |
| 5515 if (usec >= 1000000) { | |
| 5516 abstime->tv_sec += 1; | |
| 5517 usec -= 1000000; | |
| 5518 } | |
| 5519 abstime->tv_nsec = usec * 1000; | |
| 5520 return abstime; | |
| 5521 } | |
| 5522 | |
| 5523 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
| 5524 // Conceptually TryPark() should be equivalent to park(0). | |
| 5525 | |
| 5526 int os::PlatformEvent::TryPark() { | |
| 5527 for (;;) { | |
| 5528 const int v = _Event ; | |
| 5529 guarantee ((v == 0) || (v == 1), "invariant") ; | |
| 5530 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
| 5531 } | |
| 5532 } | |
| 5533 | |
| 5534 void os::PlatformEvent::park() { // AKA: down() | |
| 5535 // Invariant: Only the thread associated with the Event/PlatformEvent | |
| 5536 // may call park(). | |
| 5537 int v ; | |
| 5538 for (;;) { | |
| 5539 v = _Event ; | |
| 5540 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5541 } | |
| 5542 guarantee (v >= 0, "invariant") ; | |
| 5543 if (v == 0) { | |
| 5544 // Do this the hard way by blocking ... | |
| 5545 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
| 5546 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. | |
| 5547 // Only for SPARC >= V8PlusA | |
| 5548 #if defined(__sparc) && defined(COMPILER2) | |
| 5549 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
| 5550 #endif | |
| 5551 int status = os::Solaris::mutex_lock(_mutex); | |
| 5552 assert_status(status == 0, status, "mutex_lock"); | |
| 5553 guarantee (_nParked == 0, "invariant") ; | |
| 5554 ++ _nParked ; | |
| 5555 while (_Event < 0) { | |
| 5556 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
| 5557 // Treat this the same as if the wait was interrupted | |
| 5558 // With usr/lib/lwp going to kernel, always handle ETIME | |
| 5559 status = os::Solaris::cond_wait(_cond, _mutex); | |
| 5560 if (status == ETIME) status = EINTR ; | |
| 5561 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
| 5562 } | |
| 5563 -- _nParked ; | |
| 5564 _Event = 0 ; | |
| 5565 status = os::Solaris::mutex_unlock(_mutex); | |
| 5566 assert_status(status == 0, status, "mutex_unlock"); | |
| 5567 } | |
| 5568 } | |
| 5569 | |
| 5570 int os::PlatformEvent::park(jlong millis) { | |
| 5571 guarantee (_nParked == 0, "invariant") ; | |
| 5572 int v ; | |
| 5573 for (;;) { | |
| 5574 v = _Event ; | |
| 5575 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5576 } | |
| 5577 guarantee (v >= 0, "invariant") ; | |
| 5578 if (v != 0) return OS_OK ; | |
| 5579 | |
| 5580 int ret = OS_TIMEOUT; | |
| 5581 timestruc_t abst; | |
| 5582 compute_abstime (&abst, millis); | |
| 5583 | |
| 5584 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
| 5585 // For Solaris SPARC set fprs.FEF=0 prior to parking. | |
| 5586 // Only for SPARC >= V8PlusA | |
| 5587 #if defined(__sparc) && defined(COMPILER2) | |
| 5588 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
| 5589 #endif | |
| 5590 int status = os::Solaris::mutex_lock(_mutex); | |
| 5591 assert_status(status == 0, status, "mutex_lock"); | |
| 5592 guarantee (_nParked == 0, "invariant") ; | |
| 5593 ++ _nParked ; | |
| 5594 while (_Event < 0) { | |
| 5595 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); | |
| 5596 assert_status(status == 0 || status == EINTR || | |
| 5597 status == ETIME || status == ETIMEDOUT, | |
| 5598 status, "cond_timedwait"); | |
| 5599 if (!FilterSpuriousWakeups) break ; // previous semantics | |
| 5600 if (status == ETIME || status == ETIMEDOUT) break ; | |
| 5601 // We consume and ignore EINTR and spurious wakeups. | |
| 5602 } | |
| 5603 -- _nParked ; | |
| 5604 if (_Event >= 0) ret = OS_OK ; | |
| 5605 _Event = 0 ; | |
| 5606 status = os::Solaris::mutex_unlock(_mutex); | |
| 5607 assert_status(status == 0, status, "mutex_unlock"); | |
| 5608 return ret; | |
| 5609 } | |
| 5610 | |
| 5611 void os::PlatformEvent::unpark() { | |
| 5612 int v, AnyWaiters; | |
| 5613 | |
| 5614 // Increment _Event. | |
| 5615 // Another acceptable implementation would be to simply swap 1 | |
| 5616 // into _Event: | |
| 5617 // if (Swap (&_Event, 1) < 0) { | |
| 5618 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; | |
| 5619 // if (AnyWaiters) cond_signal (_cond) ; | |
| 5620 // } | |
| 5621 | |
| 5622 for (;;) { | |
| 5623 v = _Event ; | |
| 5624 if (v > 0) { | |
| 5625 // The LD of _Event could have reordered or be satisfied | |
| 5626 // by a read-aside from this processor's write buffer. | |
| 5627 // To avoid problems execute a barrier and then | |
| 5628 // ratify the value. A degenerate CAS() would also work. | |
| 5629 // Viz., CAS (v+0, &_Event, v) == v). | |
| 5630 OrderAccess::fence() ; | |
| 5631 if (_Event == v) return ; | |
| 5632 continue ; | |
| 5633 } | |
| 5634 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; | |
| 5635 } | |
| 5636 | |
| 5637 // If the thread associated with the event was parked, wake it. | |
| 5638 if (v < 0) { | |
| 5639 int status ; | |
| 5640 // Wait for the thread assoc with the PlatformEvent to vacate. | |
| 5641 status = os::Solaris::mutex_lock(_mutex); | |
| 5642 assert_status(status == 0, status, "mutex_lock"); | |
| 5643 AnyWaiters = _nParked ; | |
| 5644 status = os::Solaris::mutex_unlock(_mutex); | |
| 5645 assert_status(status == 0, status, "mutex_unlock"); | |
| 5646 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; | |
| 5647 if (AnyWaiters != 0) { | |
| 5648 // We intentional signal *after* dropping the lock | |
| 5649 // to avoid a common class of futile wakeups. | |
| 5650 status = os::Solaris::cond_signal(_cond); | |
| 5651 assert_status(status == 0, status, "cond_signal"); | |
| 5652 } | |
| 5653 } | |
| 5654 } | |
| 5655 | |
| 5656 // JSR166 | |
| 5657 // ------------------------------------------------------- | |
| 5658 | |
| 5659 /* | |
| 5660 * The solaris and linux implementations of park/unpark are fairly | |
| 5661 * conservative for now, but can be improved. They currently use a | |
| 5662 * mutex/condvar pair, plus _counter. | |
| 5663 * Park decrements _counter if > 0, else does a condvar wait. Unpark | |
| 5664 * sets count to 1 and signals condvar. Only one thread ever waits | |
| 5665 * on the condvar. Contention seen when trying to park implies that someone | |
| 5666 * is unparking you, so don't wait. And spurious returns are fine, so there | |
| 5667 * is no need to track notifications. | |
| 5668 */ | |
| 5669 | |
| 5670 #define NANOSECS_PER_SEC 1000000000 | |
| 5671 #define NANOSECS_PER_MILLISEC 1000000 | |
| 5672 #define MAX_SECS 100000000 | |
| 5673 | |
| 5674 /* | |
| 5675 * This code is common to linux and solaris and will be moved to a | |
| 5676 * common place in dolphin. | |
| 5677 * | |
| 5678 * The passed in time value is either a relative time in nanoseconds | |
| 5679 * or an absolute time in milliseconds. Either way it has to be unpacked | |
| 5680 * into suitable seconds and nanoseconds components and stored in the | |
| 5681 * given timespec structure. | |
| 5682 * Given time is a 64-bit value and the time_t used in the timespec is only | |
| 5683 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
| 5684 * overflow if times way in the future are given. Further on Solaris versions | |
| 5685 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
| 5686 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
| 5687 * As it will be 28 years before "now + 100000000" will overflow we can | |
| 5688 * ignore overflow and just impose a hard-limit on seconds using the value | |
| 5689 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
| 5690 * years from "now". | |
| 5691 */ | |
| 5692 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
| 5693 assert (time > 0, "convertTime"); | |
| 5694 | |
| 5695 struct timeval now; | |
| 5696 int status = gettimeofday(&now, NULL); | |
| 5697 assert(status == 0, "gettimeofday"); | |
| 5698 | |
| 5699 time_t max_secs = now.tv_sec + MAX_SECS; | |
| 5700 | |
| 5701 if (isAbsolute) { | |
| 5702 jlong secs = time / 1000; | |
| 5703 if (secs > max_secs) { | |
| 5704 absTime->tv_sec = max_secs; | |
| 5705 } | |
| 5706 else { | |
| 5707 absTime->tv_sec = secs; | |
| 5708 } | |
| 5709 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; | |
| 5710 } | |
| 5711 else { | |
| 5712 jlong secs = time / NANOSECS_PER_SEC; | |
| 5713 if (secs >= MAX_SECS) { | |
| 5714 absTime->tv_sec = max_secs; | |
| 5715 absTime->tv_nsec = 0; | |
| 5716 } | |
| 5717 else { | |
| 5718 absTime->tv_sec = now.tv_sec + secs; | |
| 5719 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; | |
| 5720 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { | |
| 5721 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
| 5722 ++absTime->tv_sec; // note: this must be <= max_secs | |
| 5723 } | |
| 5724 } | |
| 5725 } | |
| 5726 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
| 5727 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
| 5728 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
| 5729 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
| 5730 } | |
| 5731 | |
| 5732 void Parker::park(bool isAbsolute, jlong time) { | |
| 5733 | |
| 5734 // Optional fast-path check: | |
| 5735 // Return immediately if a permit is available. | |
| 5736 if (_counter > 0) { | |
| 5737 _counter = 0 ; | |
| 5738 return ; | |
| 5739 } | |
| 5740 | |
| 5741 // Optional fast-exit: Check interrupt before trying to wait | |
| 5742 Thread* thread = Thread::current(); | |
| 5743 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
| 5744 JavaThread *jt = (JavaThread *)thread; | |
| 5745 if (Thread::is_interrupted(thread, false)) { | |
| 5746 return; | |
| 5747 } | |
| 5748 | |
| 5749 // First, demultiplex/decode time arguments | |
| 5750 timespec absTime; | |
| 5751 if (time < 0) { // don't wait at all | |
| 5752 return; | |
| 5753 } | |
| 5754 if (time > 0) { | |
| 5755 // Warning: this code might be exposed to the old Solaris time | |
| 5756 // round-down bugs. Grep "roundingFix" for details. | |
| 5757 unpackTime(&absTime, isAbsolute, time); | |
| 5758 } | |
| 5759 | |
| 5760 // Enter safepoint region | |
| 5761 // Beware of deadlocks such as 6317397. | |
| 5762 // The per-thread Parker:: _mutex is a classic leaf-lock. | |
| 5763 // In particular a thread must never block on the Threads_lock while | |
| 5764 // holding the Parker:: mutex. If safepoints are pending both the | |
| 5765 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
| 5766 ThreadBlockInVM tbivm(jt); | |
| 5767 | |
| 5768 // Don't wait if cannot get lock since interference arises from | |
| 5769 // unblocking. Also. check interrupt before trying wait | |
| 5770 if (Thread::is_interrupted(thread, false) || | |
| 5771 os::Solaris::mutex_trylock(_mutex) != 0) { | |
| 5772 return; | |
| 5773 } | |
| 5774 | |
| 5775 int status ; | |
| 5776 | |
| 5777 if (_counter > 0) { // no wait needed | |
| 5778 _counter = 0; | |
| 5779 status = os::Solaris::mutex_unlock(_mutex); | |
| 5780 assert (status == 0, "invariant") ; | |
| 5781 return; | |
| 5782 } | |
| 5783 | |
| 5784 #ifdef ASSERT | |
| 5785 // Don't catch signals while blocked; let the running threads have the signals. | |
| 5786 // (This allows a debugger to break into the running thread.) | |
| 5787 sigset_t oldsigs; | |
| 5788 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); | |
| 5789 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
| 5790 #endif | |
| 5791 | |
| 5792 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 5793 jt->set_suspend_equivalent(); | |
| 5794 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 5795 | |
| 5796 // Do this the hard way by blocking ... | |
| 5797 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
| 5798 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. | |
| 5799 // Only for SPARC >= V8PlusA | |
| 5800 #if defined(__sparc) && defined(COMPILER2) | |
| 5801 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
| 5802 #endif | |
| 5803 | |
| 5804 if (time == 0) { | |
| 5805 status = os::Solaris::cond_wait (_cond, _mutex) ; | |
| 5806 } else { | |
| 5807 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); | |
| 5808 } | |
| 5809 // Note that an untimed cond_wait() can sometimes return ETIME on older | |
| 5810 // versions of the Solaris. | |
| 5811 assert_status(status == 0 || status == EINTR || | |
| 5812 status == ETIME || status == ETIMEDOUT, | |
| 5813 status, "cond_timedwait"); | |
| 5814 | |
| 5815 #ifdef ASSERT | |
| 5816 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); | |
| 5817 #endif | |
| 5818 _counter = 0 ; | |
| 5819 status = os::Solaris::mutex_unlock(_mutex); | |
| 5820 assert_status(status == 0, status, "mutex_unlock") ; | |
| 5821 | |
| 5822 // If externally suspended while waiting, re-suspend | |
| 5823 if (jt->handle_special_suspend_equivalent_condition()) { | |
| 5824 jt->java_suspend_self(); | |
| 5825 } | |
| 5826 | |
| 5827 } | |
| 5828 | |
| 5829 void Parker::unpark() { | |
| 5830 int s, status ; | |
| 5831 status = os::Solaris::mutex_lock (_mutex) ; | |
| 5832 assert (status == 0, "invariant") ; | |
| 5833 s = _counter; | |
| 5834 _counter = 1; | |
| 5835 status = os::Solaris::mutex_unlock (_mutex) ; | |
| 5836 assert (status == 0, "invariant") ; | |
| 5837 | |
| 5838 if (s < 1) { | |
| 5839 status = os::Solaris::cond_signal (_cond) ; | |
| 5840 assert (status == 0, "invariant") ; | |
| 5841 } | |
| 5842 } | |
| 5843 | |
| 5844 extern char** environ; | |
| 5845 | |
| 5846 // Run the specified command in a separate process. Return its exit value, | |
| 5847 // or -1 on failure (e.g. can't fork a new process). | |
| 5848 // Unlike system(), this function can be called from signal handler. It | |
| 5849 // doesn't block SIGINT et al. | |
| 5850 int os::fork_and_exec(char* cmd) { | |
| 5851 char * argv[4]; | |
| 5852 argv[0] = (char *)"sh"; | |
| 5853 argv[1] = (char *)"-c"; | |
| 5854 argv[2] = cmd; | |
| 5855 argv[3] = NULL; | |
| 5856 | |
| 5857 // fork is async-safe, fork1 is not so can't use in signal handler | |
| 5858 pid_t pid; | |
| 5859 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
| 5860 if (t != NULL && t->is_inside_signal_handler()) { | |
| 5861 pid = fork(); | |
| 5862 } else { | |
| 5863 pid = fork1(); | |
| 5864 } | |
| 5865 | |
| 5866 if (pid < 0) { | |
| 5867 // fork failed | |
| 5868 warning("fork failed: %s", strerror(errno)); | |
| 5869 return -1; | |
| 5870 | |
| 5871 } else if (pid == 0) { | |
| 5872 // child process | |
| 5873 | |
| 5874 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris | |
| 5875 execve("/usr/bin/sh", argv, environ); | |
| 5876 | |
| 5877 // execve failed | |
| 5878 _exit(-1); | |
| 5879 | |
| 5880 } else { | |
| 5881 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
| 5882 // care about the actual exit code, for now. | |
| 5883 | |
| 5884 int status; | |
| 5885 | |
| 5886 // Wait for the child process to exit. This returns immediately if | |
| 5887 // the child has already exited. */ | |
| 5888 while (waitpid(pid, &status, 0) < 0) { | |
| 5889 switch (errno) { | |
| 5890 case ECHILD: return 0; | |
| 5891 case EINTR: break; | |
| 5892 default: return -1; | |
| 5893 } | |
| 5894 } | |
| 5895 | |
| 5896 if (WIFEXITED(status)) { | |
| 5897 // The child exited normally; get its exit code. | |
| 5898 return WEXITSTATUS(status); | |
| 5899 } else if (WIFSIGNALED(status)) { | |
| 5900 // The child exited because of a signal | |
| 5901 // The best value to return is 0x80 + signal number, | |
| 5902 // because that is what all Unix shells do, and because | |
| 5903 // it allows callers to distinguish between process exit and | |
| 5904 // process death by signal. | |
| 5905 return 0x80 + WTERMSIG(status); | |
| 5906 } else { | |
| 5907 // Unknown exit code; pass it through | |
| 5908 return status; | |
| 5909 } | |
| 5910 } | |
| 5911 } |