Mercurial > hg > truffle
annotate src/os/solaris/vm/os_solaris.cpp @ 1035:a3b9e96881fe
Merge
author | xlu |
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date | Fri, 23 Oct 2009 18:44:33 -0700 |
parents | 665be97e8704 |
children | 95e9083cf4a7 |
rev | line source |
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0 | 1 /* |
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2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // do not include precompiled header file | |
26 # include "incls/_os_solaris.cpp.incl" | |
27 | |
28 // put OS-includes here | |
29 # include <dlfcn.h> | |
30 # include <errno.h> | |
31 # include <link.h> | |
32 # include <poll.h> | |
33 # include <pthread.h> | |
34 # include <pwd.h> | |
35 # include <schedctl.h> | |
36 # include <setjmp.h> | |
37 # include <signal.h> | |
38 # include <stdio.h> | |
39 # include <alloca.h> | |
40 # include <sys/filio.h> | |
41 # include <sys/ipc.h> | |
42 # include <sys/lwp.h> | |
43 # include <sys/machelf.h> // for elf Sym structure used by dladdr1 | |
44 # include <sys/mman.h> | |
45 # include <sys/processor.h> | |
46 # include <sys/procset.h> | |
47 # include <sys/pset.h> | |
48 # include <sys/resource.h> | |
49 # include <sys/shm.h> | |
50 # include <sys/socket.h> | |
51 # include <sys/stat.h> | |
52 # include <sys/systeminfo.h> | |
53 # include <sys/time.h> | |
54 # include <sys/times.h> | |
55 # include <sys/types.h> | |
56 # include <sys/wait.h> | |
57 # include <sys/utsname.h> | |
58 # include <thread.h> | |
59 # include <unistd.h> | |
60 # include <sys/priocntl.h> | |
61 # include <sys/rtpriocntl.h> | |
62 # include <sys/tspriocntl.h> | |
63 # include <sys/iapriocntl.h> | |
64 # include <sys/loadavg.h> | |
65 # include <string.h> | |
66 | |
67 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later | |
68 # include <sys/procfs.h> // see comment in <sys/procfs.h> | |
69 | |
70 #define MAX_PATH (2 * K) | |
71 | |
72 // for timer info max values which include all bits | |
73 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) | |
74 | |
75 #ifdef _GNU_SOURCE | |
76 // See bug #6514594 | |
77 extern "C" int madvise(caddr_t, size_t, int); | |
78 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, | |
79 int attr, int mask); | |
80 #endif //_GNU_SOURCE | |
81 | |
82 /* | |
83 MPSS Changes Start. | |
84 The JVM binary needs to be built and run on pre-Solaris 9 | |
85 systems, but the constants needed by MPSS are only in Solaris 9 | |
86 header files. They are textually replicated here to allow | |
87 building on earlier systems. Once building on Solaris 8 is | |
88 no longer a requirement, these #defines can be replaced by ordinary | |
89 system .h inclusion. | |
90 | |
91 In earlier versions of the JDK and Solaris, we used ISM for large pages. | |
92 But ISM requires shared memory to achieve this and thus has many caveats. | |
93 MPSS is a fully transparent and is a cleaner way to get large pages. | |
94 Although we still require keeping ISM for backward compatiblitiy as well as | |
95 giving the opportunity to use large pages on older systems it is | |
96 recommended that MPSS be used for Solaris 9 and above. | |
97 | |
98 */ | |
99 | |
100 #ifndef MC_HAT_ADVISE | |
101 | |
102 struct memcntl_mha { | |
103 uint_t mha_cmd; /* command(s) */ | |
104 uint_t mha_flags; | |
105 size_t mha_pagesize; | |
106 }; | |
107 #define MC_HAT_ADVISE 7 /* advise hat map size */ | |
108 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ | |
109 #define MAP_ALIGN 0x200 /* addr specifies alignment */ | |
110 | |
111 #endif | |
112 // MPSS Changes End. | |
113 | |
114 | |
115 // Here are some liblgrp types from sys/lgrp_user.h to be able to | |
116 // compile on older systems without this header file. | |
117 | |
118 #ifndef MADV_ACCESS_LWP | |
119 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ | |
120 #endif | |
121 #ifndef MADV_ACCESS_MANY | |
122 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */ | |
123 #endif | |
124 | |
144
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125 #ifndef LGRP_RSRC_CPU |
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126 # define LGRP_RSRC_CPU 0 /* CPU resources */ |
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127 #endif |
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128 #ifndef LGRP_RSRC_MEM |
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129 # define LGRP_RSRC_MEM 1 /* memory resources */ |
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130 #endif |
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131 |
0 | 132 // Some more macros from sys/mman.h that are not present in Solaris 8. |
133 | |
134 #ifndef MAX_MEMINFO_CNT | |
135 /* | |
136 * info_req request type definitions for meminfo | |
137 * request types starting with MEMINFO_V are used for Virtual addresses | |
138 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical | |
139 * addresses | |
140 */ | |
141 # define MEMINFO_SHIFT 16 | |
142 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) | |
143 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ | |
144 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ | |
145 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ | |
146 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ | |
147 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ | |
148 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ | |
149 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ | |
150 | |
151 /* maximum number of addresses meminfo() can process at a time */ | |
152 # define MAX_MEMINFO_CNT 256 | |
153 | |
154 /* maximum number of request types */ | |
155 # define MAX_MEMINFO_REQ 31 | |
156 #endif | |
157 | |
158 // see thr_setprio(3T) for the basis of these numbers | |
159 #define MinimumPriority 0 | |
160 #define NormalPriority 64 | |
161 #define MaximumPriority 127 | |
162 | |
163 // Values for ThreadPriorityPolicy == 1 | |
164 int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64, | |
165 80, 96, 112, 124, 127 }; | |
166 | |
167 // System parameters used internally | |
168 static clock_t clock_tics_per_sec = 100; | |
169 | |
170 // For diagnostics to print a message once. see run_periodic_checks | |
171 static bool check_addr0_done = false; | |
172 static sigset_t check_signal_done; | |
173 static bool check_signals = true; | |
174 | |
175 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo | |
176 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo | |
177 | |
178 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround | |
179 | |
180 | |
181 // "default" initializers for missing libc APIs | |
182 extern "C" { | |
183 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } | |
184 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } | |
185 | |
186 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } | |
187 static int lwp_cond_destroy(cond_t *cv) { return 0; } | |
188 } | |
189 | |
190 // "default" initializers for pthread-based synchronization | |
191 extern "C" { | |
192 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } | |
193 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } | |
194 } | |
195 | |
196 // Thread Local Storage | |
197 // This is common to all Solaris platforms so it is defined here, | |
198 // in this common file. | |
199 // The declarations are in the os_cpu threadLS*.hpp files. | |
200 // | |
201 // Static member initialization for TLS | |
202 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; | |
203 | |
204 #ifndef PRODUCT | |
205 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) | |
206 | |
207 int ThreadLocalStorage::_tcacheHit = 0; | |
208 int ThreadLocalStorage::_tcacheMiss = 0; | |
209 | |
210 void ThreadLocalStorage::print_statistics() { | |
211 int total = _tcacheMiss+_tcacheHit; | |
212 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", | |
213 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); | |
214 } | |
215 #undef _PCT | |
216 #endif // PRODUCT | |
217 | |
218 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, | |
219 int index) { | |
220 Thread *thread = get_thread_slow(); | |
221 if (thread != NULL) { | |
222 address sp = os::current_stack_pointer(); | |
223 guarantee(thread->_stack_base == NULL || | |
224 (sp <= thread->_stack_base && | |
225 sp >= thread->_stack_base - thread->_stack_size) || | |
226 is_error_reported(), | |
227 "sp must be inside of selected thread stack"); | |
228 | |
229 thread->_self_raw_id = raw_id; // mark for quick retrieval | |
230 _get_thread_cache[ index ] = thread; | |
231 } | |
232 return thread; | |
233 } | |
234 | |
235 | |
236 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; | |
237 #define NO_CACHED_THREAD ((Thread*)all_zero) | |
238 | |
239 void ThreadLocalStorage::pd_set_thread(Thread* thread) { | |
240 | |
241 // Store the new value before updating the cache to prevent a race | |
242 // between get_thread_via_cache_slowly() and this store operation. | |
243 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); | |
244 | |
245 // Update thread cache with new thread if setting on thread create, | |
246 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. | |
247 uintptr_t raw = pd_raw_thread_id(); | |
248 int ix = pd_cache_index(raw); | |
249 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; | |
250 } | |
251 | |
252 void ThreadLocalStorage::pd_init() { | |
253 for (int i = 0; i < _pd_cache_size; i++) { | |
254 _get_thread_cache[i] = NO_CACHED_THREAD; | |
255 } | |
256 } | |
257 | |
258 // Invalidate all the caches (happens to be the same as pd_init). | |
259 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } | |
260 | |
261 #undef NO_CACHED_THREAD | |
262 | |
263 // END Thread Local Storage | |
264 | |
265 static inline size_t adjust_stack_size(address base, size_t size) { | |
266 if ((ssize_t)size < 0) { | |
267 // 4759953: Compensate for ridiculous stack size. | |
268 size = max_intx; | |
269 } | |
270 if (size > (size_t)base) { | |
271 // 4812466: Make sure size doesn't allow the stack to wrap the address space. | |
272 size = (size_t)base; | |
273 } | |
274 return size; | |
275 } | |
276 | |
277 static inline stack_t get_stack_info() { | |
278 stack_t st; | |
279 int retval = thr_stksegment(&st); | |
280 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); | |
281 assert(retval == 0, "incorrect return value from thr_stksegment"); | |
282 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); | |
283 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); | |
284 return st; | |
285 } | |
286 | |
287 address os::current_stack_base() { | |
288 int r = thr_main() ; | |
289 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; | |
290 bool is_primordial_thread = r; | |
291 | |
292 // Workaround 4352906, avoid calls to thr_stksegment by | |
293 // thr_main after the first one (it looks like we trash | |
294 // some data, causing the value for ss_sp to be incorrect). | |
295 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { | |
296 stack_t st = get_stack_info(); | |
297 if (is_primordial_thread) { | |
298 // cache initial value of stack base | |
299 os::Solaris::_main_stack_base = (address)st.ss_sp; | |
300 } | |
301 return (address)st.ss_sp; | |
302 } else { | |
303 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); | |
304 return os::Solaris::_main_stack_base; | |
305 } | |
306 } | |
307 | |
308 size_t os::current_stack_size() { | |
309 size_t size; | |
310 | |
311 int r = thr_main() ; | |
312 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; | |
313 if(!r) { | |
314 size = get_stack_info().ss_size; | |
315 } else { | |
316 struct rlimit limits; | |
317 getrlimit(RLIMIT_STACK, &limits); | |
318 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); | |
319 } | |
320 // base may not be page aligned | |
321 address base = current_stack_base(); | |
322 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; | |
323 return (size_t)(base - bottom); | |
324 } | |
325 | |
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326 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
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327 return localtime_r(clock, res); |
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328 } |
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329 |
0 | 330 // interruptible infrastructure |
331 | |
332 // setup_interruptible saves the thread state before going into an | |
333 // interruptible system call. | |
334 // The saved state is used to restore the thread to | |
335 // its former state whether or not an interrupt is received. | |
336 // Used by classloader os::read | |
337 // hpi calls skip this layer and stay in _thread_in_native | |
338 | |
339 void os::Solaris::setup_interruptible(JavaThread* thread) { | |
340 | |
341 JavaThreadState thread_state = thread->thread_state(); | |
342 | |
343 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); | |
344 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); | |
345 OSThread* osthread = thread->osthread(); | |
346 osthread->set_saved_interrupt_thread_state(thread_state); | |
347 thread->frame_anchor()->make_walkable(thread); | |
348 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); | |
349 } | |
350 | |
351 // Version of setup_interruptible() for threads that are already in | |
352 // _thread_blocked. Used by os_sleep(). | |
353 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { | |
354 thread->frame_anchor()->make_walkable(thread); | |
355 } | |
356 | |
357 JavaThread* os::Solaris::setup_interruptible() { | |
358 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); | |
359 setup_interruptible(thread); | |
360 return thread; | |
361 } | |
362 | |
363 void os::Solaris::try_enable_extended_io() { | |
364 typedef int (*enable_extended_FILE_stdio_t)(int, int); | |
365 | |
366 if (!UseExtendedFileIO) { | |
367 return; | |
368 } | |
369 | |
370 enable_extended_FILE_stdio_t enabler = | |
371 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, | |
372 "enable_extended_FILE_stdio"); | |
373 if (enabler) { | |
374 enabler(-1, -1); | |
375 } | |
376 } | |
377 | |
378 | |
379 #ifdef ASSERT | |
380 | |
381 JavaThread* os::Solaris::setup_interruptible_native() { | |
382 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); | |
383 JavaThreadState thread_state = thread->thread_state(); | |
384 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); | |
385 return thread; | |
386 } | |
387 | |
388 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { | |
389 JavaThreadState thread_state = thread->thread_state(); | |
390 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); | |
391 } | |
392 #endif | |
393 | |
394 // cleanup_interruptible reverses the effects of setup_interruptible | |
395 // setup_interruptible_already_blocked() does not need any cleanup. | |
396 | |
397 void os::Solaris::cleanup_interruptible(JavaThread* thread) { | |
398 OSThread* osthread = thread->osthread(); | |
399 | |
400 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); | |
401 } | |
402 | |
403 // I/O interruption related counters called in _INTERRUPTIBLE | |
404 | |
405 void os::Solaris::bump_interrupted_before_count() { | |
406 RuntimeService::record_interrupted_before_count(); | |
407 } | |
408 | |
409 void os::Solaris::bump_interrupted_during_count() { | |
410 RuntimeService::record_interrupted_during_count(); | |
411 } | |
412 | |
413 static int _processors_online = 0; | |
414 | |
415 jint os::Solaris::_os_thread_limit = 0; | |
416 volatile jint os::Solaris::_os_thread_count = 0; | |
417 | |
418 julong os::available_memory() { | |
419 return Solaris::available_memory(); | |
420 } | |
421 | |
422 julong os::Solaris::available_memory() { | |
423 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); | |
424 } | |
425 | |
426 julong os::Solaris::_physical_memory = 0; | |
427 | |
428 julong os::physical_memory() { | |
429 return Solaris::physical_memory(); | |
430 } | |
431 | |
432 julong os::allocatable_physical_memory(julong size) { | |
433 #ifdef _LP64 | |
434 return size; | |
435 #else | |
436 julong result = MIN2(size, (julong)3835*M); | |
437 if (!is_allocatable(result)) { | |
438 // Memory allocations will be aligned but the alignment | |
439 // is not known at this point. Alignments will | |
440 // be at most to LargePageSizeInBytes. Protect | |
441 // allocations from alignments up to illegal | |
442 // values. If at this point 2G is illegal. | |
443 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; | |
444 result = MIN2(size, reasonable_size); | |
445 } | |
446 return result; | |
447 #endif | |
448 } | |
449 | |
450 static hrtime_t first_hrtime = 0; | |
451 static const hrtime_t hrtime_hz = 1000*1000*1000; | |
452 const int LOCK_BUSY = 1; | |
453 const int LOCK_FREE = 0; | |
454 const int LOCK_INVALID = -1; | |
455 static volatile hrtime_t max_hrtime = 0; | |
456 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress | |
457 | |
458 | |
459 void os::Solaris::initialize_system_info() { | |
460 _processor_count = sysconf(_SC_NPROCESSORS_CONF); | |
461 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); | |
462 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); | |
463 } | |
464 | |
465 int os::active_processor_count() { | |
466 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); | |
467 pid_t pid = getpid(); | |
468 psetid_t pset = PS_NONE; | |
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469 // Are we running in a processor set or is there any processor set around? |
0 | 470 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { |
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471 uint_t pset_cpus; |
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472 // Query the number of cpus available to us. |
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473 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { |
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474 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); |
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475 _processors_online = pset_cpus; |
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476 return pset_cpus; |
0 | 477 } |
478 } | |
479 // Otherwise return number of online cpus | |
480 return online_cpus; | |
481 } | |
482 | |
483 static bool find_processors_in_pset(psetid_t pset, | |
484 processorid_t** id_array, | |
485 uint_t* id_length) { | |
486 bool result = false; | |
487 // Find the number of processors in the processor set. | |
488 if (pset_info(pset, NULL, id_length, NULL) == 0) { | |
489 // Make up an array to hold their ids. | |
490 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); | |
491 // Fill in the array with their processor ids. | |
492 if (pset_info(pset, NULL, id_length, *id_array) == 0) { | |
493 result = true; | |
494 } | |
495 } | |
496 return result; | |
497 } | |
498 | |
499 // Callers of find_processors_online() must tolerate imprecise results -- | |
500 // the system configuration can change asynchronously because of DR | |
501 // or explicit psradm operations. | |
502 // | |
503 // We also need to take care that the loop (below) terminates as the | |
504 // number of processors online can change between the _SC_NPROCESSORS_ONLN | |
505 // request and the loop that builds the list of processor ids. Unfortunately | |
506 // there's no reliable way to determine the maximum valid processor id, | |
507 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online | |
508 // man pages, which claim the processor id set is "sparse, but | |
509 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually | |
510 // exit the loop. | |
511 // | |
512 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's | |
513 // not available on S8.0. | |
514 | |
515 static bool find_processors_online(processorid_t** id_array, | |
516 uint* id_length) { | |
517 const processorid_t MAX_PROCESSOR_ID = 100000 ; | |
518 // Find the number of processors online. | |
519 *id_length = sysconf(_SC_NPROCESSORS_ONLN); | |
520 // Make up an array to hold their ids. | |
521 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); | |
522 // Processors need not be numbered consecutively. | |
523 long found = 0; | |
524 processorid_t next = 0; | |
525 while (found < *id_length && next < MAX_PROCESSOR_ID) { | |
526 processor_info_t info; | |
527 if (processor_info(next, &info) == 0) { | |
528 // NB, PI_NOINTR processors are effectively online ... | |
529 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { | |
530 (*id_array)[found] = next; | |
531 found += 1; | |
532 } | |
533 } | |
534 next += 1; | |
535 } | |
536 if (found < *id_length) { | |
537 // The loop above didn't identify the expected number of processors. | |
538 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) | |
539 // and re-running the loop, above, but there's no guarantee of progress | |
540 // if the system configuration is in flux. Instead, we just return what | |
541 // we've got. Note that in the worst case find_processors_online() could | |
542 // return an empty set. (As a fall-back in the case of the empty set we | |
543 // could just return the ID of the current processor). | |
544 *id_length = found ; | |
545 } | |
546 | |
547 return true; | |
548 } | |
549 | |
550 static bool assign_distribution(processorid_t* id_array, | |
551 uint id_length, | |
552 uint* distribution, | |
553 uint distribution_length) { | |
554 // We assume we can assign processorid_t's to uint's. | |
555 assert(sizeof(processorid_t) == sizeof(uint), | |
556 "can't convert processorid_t to uint"); | |
557 // Quick check to see if we won't succeed. | |
558 if (id_length < distribution_length) { | |
559 return false; | |
560 } | |
561 // Assign processor ids to the distribution. | |
562 // Try to shuffle processors to distribute work across boards, | |
563 // assuming 4 processors per board. | |
564 const uint processors_per_board = ProcessDistributionStride; | |
565 // Find the maximum processor id. | |
566 processorid_t max_id = 0; | |
567 for (uint m = 0; m < id_length; m += 1) { | |
568 max_id = MAX2(max_id, id_array[m]); | |
569 } | |
570 // The next id, to limit loops. | |
571 const processorid_t limit_id = max_id + 1; | |
572 // Make up markers for available processors. | |
573 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); | |
574 for (uint c = 0; c < limit_id; c += 1) { | |
575 available_id[c] = false; | |
576 } | |
577 for (uint a = 0; a < id_length; a += 1) { | |
578 available_id[id_array[a]] = true; | |
579 } | |
580 // Step by "boards", then by "slot", copying to "assigned". | |
581 // NEEDS_CLEANUP: The assignment of processors should be stateful, | |
582 // remembering which processors have been assigned by | |
583 // previous calls, etc., so as to distribute several | |
584 // independent calls of this method. What we'd like is | |
585 // It would be nice to have an API that let us ask | |
586 // how many processes are bound to a processor, | |
587 // but we don't have that, either. | |
588 // In the short term, "board" is static so that | |
589 // subsequent distributions don't all start at board 0. | |
590 static uint board = 0; | |
591 uint assigned = 0; | |
592 // Until we've found enough processors .... | |
593 while (assigned < distribution_length) { | |
594 // ... find the next available processor in the board. | |
595 for (uint slot = 0; slot < processors_per_board; slot += 1) { | |
596 uint try_id = board * processors_per_board + slot; | |
597 if ((try_id < limit_id) && (available_id[try_id] == true)) { | |
598 distribution[assigned] = try_id; | |
599 available_id[try_id] = false; | |
600 assigned += 1; | |
601 break; | |
602 } | |
603 } | |
604 board += 1; | |
605 if (board * processors_per_board + 0 >= limit_id) { | |
606 board = 0; | |
607 } | |
608 } | |
609 if (available_id != NULL) { | |
610 FREE_C_HEAP_ARRAY(bool, available_id); | |
611 } | |
612 return true; | |
613 } | |
614 | |
615 bool os::distribute_processes(uint length, uint* distribution) { | |
616 bool result = false; | |
617 // Find the processor id's of all the available CPUs. | |
618 processorid_t* id_array = NULL; | |
619 uint id_length = 0; | |
620 // There are some races between querying information and using it, | |
621 // since processor sets can change dynamically. | |
622 psetid_t pset = PS_NONE; | |
623 // Are we running in a processor set? | |
624 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { | |
625 result = find_processors_in_pset(pset, &id_array, &id_length); | |
626 } else { | |
627 result = find_processors_online(&id_array, &id_length); | |
628 } | |
629 if (result == true) { | |
630 if (id_length >= length) { | |
631 result = assign_distribution(id_array, id_length, distribution, length); | |
632 } else { | |
633 result = false; | |
634 } | |
635 } | |
636 if (id_array != NULL) { | |
637 FREE_C_HEAP_ARRAY(processorid_t, id_array); | |
638 } | |
639 return result; | |
640 } | |
641 | |
642 bool os::bind_to_processor(uint processor_id) { | |
643 // We assume that a processorid_t can be stored in a uint. | |
644 assert(sizeof(uint) == sizeof(processorid_t), | |
645 "can't convert uint to processorid_t"); | |
646 int bind_result = | |
647 processor_bind(P_LWPID, // bind LWP. | |
648 P_MYID, // bind current LWP. | |
649 (processorid_t) processor_id, // id. | |
650 NULL); // don't return old binding. | |
651 return (bind_result == 0); | |
652 } | |
653 | |
654 bool os::getenv(const char* name, char* buffer, int len) { | |
655 char* val = ::getenv( name ); | |
656 if ( val == NULL | |
657 || strlen(val) + 1 > len ) { | |
658 if (len > 0) buffer[0] = 0; // return a null string | |
659 return false; | |
660 } | |
661 strcpy( buffer, val ); | |
662 return true; | |
663 } | |
664 | |
665 | |
666 // Return true if user is running as root. | |
667 | |
668 bool os::have_special_privileges() { | |
669 static bool init = false; | |
670 static bool privileges = false; | |
671 if (!init) { | |
672 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
673 init = true; | |
674 } | |
675 return privileges; | |
676 } | |
677 | |
678 | |
679 static char* get_property(char* name, char* buffer, int buffer_size) { | |
680 if (os::getenv(name, buffer, buffer_size)) { | |
681 return buffer; | |
682 } | |
683 static char empty[] = ""; | |
684 return empty; | |
685 } | |
686 | |
687 | |
688 void os::init_system_properties_values() { | |
689 char arch[12]; | |
690 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); | |
691 | |
692 // The next steps are taken in the product version: | |
693 // | |
694 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. | |
695 // This library should be located at: | |
696 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. | |
697 // | |
698 // If "/jre/lib/" appears at the right place in the path, then we | |
699 // assume libjvm[_g].so is installed in a JDK and we use this path. | |
700 // | |
701 // Otherwise exit with message: "Could not create the Java virtual machine." | |
702 // | |
703 // The following extra steps are taken in the debugging version: | |
704 // | |
705 // If "/jre/lib/" does NOT appear at the right place in the path | |
706 // instead of exit check for $JAVA_HOME environment variable. | |
707 // | |
708 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, | |
709 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so | |
710 // it looks like libjvm[_g].so is installed there | |
711 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. | |
712 // | |
713 // Otherwise exit. | |
714 // | |
715 // Important note: if the location of libjvm.so changes this | |
716 // code needs to be changed accordingly. | |
717 | |
718 // The next few definitions allow the code to be verbatim: | |
719 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) | |
720 #define free(p) FREE_C_HEAP_ARRAY(char, p) | |
721 #define getenv(n) ::getenv(n) | |
722 | |
723 #define EXTENSIONS_DIR "/lib/ext" | |
724 #define ENDORSED_DIR "/lib/endorsed" | |
725 #define COMMON_DIR "/usr/jdk/packages" | |
726 | |
727 { | |
728 /* sysclasspath, java_home, dll_dir */ | |
729 { | |
730 char *home_path; | |
731 char *dll_path; | |
732 char *pslash; | |
733 char buf[MAXPATHLEN]; | |
734 os::jvm_path(buf, sizeof(buf)); | |
735 | |
736 // Found the full path to libjvm.so. | |
737 // Now cut the path to <java_home>/jre if we can. | |
738 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ | |
739 pslash = strrchr(buf, '/'); | |
740 if (pslash != NULL) | |
741 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ | |
742 dll_path = malloc(strlen(buf) + 1); | |
743 if (dll_path == NULL) | |
744 return; | |
745 strcpy(dll_path, buf); | |
746 Arguments::set_dll_dir(dll_path); | |
747 | |
748 if (pslash != NULL) { | |
749 pslash = strrchr(buf, '/'); | |
750 if (pslash != NULL) { | |
751 *pslash = '\0'; /* get rid of /<arch> */ | |
752 pslash = strrchr(buf, '/'); | |
753 if (pslash != NULL) | |
754 *pslash = '\0'; /* get rid of /lib */ | |
755 } | |
756 } | |
757 | |
758 home_path = malloc(strlen(buf) + 1); | |
759 if (home_path == NULL) | |
760 return; | |
761 strcpy(home_path, buf); | |
762 Arguments::set_java_home(home_path); | |
763 | |
764 if (!set_boot_path('/', ':')) | |
765 return; | |
766 } | |
767 | |
768 /* | |
769 * Where to look for native libraries | |
770 */ | |
771 { | |
772 // Use dlinfo() to determine the correct java.library.path. | |
773 // | |
774 // If we're launched by the Java launcher, and the user | |
775 // does not set java.library.path explicitly on the commandline, | |
776 // the Java launcher sets LD_LIBRARY_PATH for us and unsets | |
777 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case | |
778 // dlinfo returns LD_LIBRARY_PATH + crle settings (including | |
779 // /usr/lib), which is exactly what we want. | |
780 // | |
781 // If the user does set java.library.path, it completely | |
782 // overwrites this setting, and always has. | |
783 // | |
784 // If we're not launched by the Java launcher, we may | |
785 // get here with any/all of the LD_LIBRARY_PATH[_32|64] | |
786 // settings. Again, dlinfo does exactly what we want. | |
787 | |
788 Dl_serinfo _info, *info = &_info; | |
789 Dl_serpath *path; | |
790 char* library_path; | |
791 char *common_path; | |
792 int i; | |
793 | |
794 // determine search path count and required buffer size | |
795 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { | |
796 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); | |
797 } | |
798 | |
799 // allocate new buffer and initialize | |
800 info = (Dl_serinfo*)malloc(_info.dls_size); | |
801 if (info == NULL) { | |
802 vm_exit_out_of_memory(_info.dls_size, | |
803 "init_system_properties_values info"); | |
804 } | |
805 info->dls_size = _info.dls_size; | |
806 info->dls_cnt = _info.dls_cnt; | |
807 | |
808 // obtain search path information | |
809 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { | |
810 free(info); | |
811 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); | |
812 } | |
813 | |
814 path = &info->dls_serpath[0]; | |
815 | |
816 // Note: Due to a legacy implementation, most of the library path | |
817 // is set in the launcher. This was to accomodate linking restrictions | |
818 // on legacy Solaris implementations (which are no longer supported). | |
819 // Eventually, all the library path setting will be done here. | |
820 // | |
821 // However, to prevent the proliferation of improperly built native | |
822 // libraries, the new path component /usr/jdk/packages is added here. | |
823 | |
824 // Determine the actual CPU architecture. | |
825 char cpu_arch[12]; | |
826 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); | |
827 #ifdef _LP64 | |
828 // If we are a 64-bit vm, perform the following translations: | |
829 // sparc -> sparcv9 | |
830 // i386 -> amd64 | |
831 if (strcmp(cpu_arch, "sparc") == 0) | |
832 strcat(cpu_arch, "v9"); | |
833 else if (strcmp(cpu_arch, "i386") == 0) | |
834 strcpy(cpu_arch, "amd64"); | |
835 #endif | |
836 | |
837 // Construct the invariant part of ld_library_path. Note that the | |
838 // space for the colon and the trailing null are provided by the | |
839 // nulls included by the sizeof operator. | |
840 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); | |
841 common_path = malloc(bufsize); | |
842 if (common_path == NULL) { | |
843 free(info); | |
844 vm_exit_out_of_memory(bufsize, | |
845 "init_system_properties_values common_path"); | |
846 } | |
847 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); | |
848 | |
849 // struct size is more than sufficient for the path components obtained | |
850 // through the dlinfo() call, so only add additional space for the path | |
851 // components explicitly added here. | |
852 bufsize = info->dls_size + strlen(common_path); | |
853 library_path = malloc(bufsize); | |
854 if (library_path == NULL) { | |
855 free(info); | |
856 free(common_path); | |
857 vm_exit_out_of_memory(bufsize, | |
858 "init_system_properties_values library_path"); | |
859 } | |
860 library_path[0] = '\0'; | |
861 | |
862 // Construct the desired Java library path from the linker's library | |
863 // search path. | |
864 // | |
865 // For compatibility, it is optimal that we insert the additional path | |
866 // components specific to the Java VM after those components specified | |
867 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so | |
868 // infrastructure. | |
869 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it | |
870 strcpy(library_path, common_path); | |
871 } else { | |
872 int inserted = 0; | |
873 for (i = 0; i < info->dls_cnt; i++, path++) { | |
874 uint_t flags = path->dls_flags & LA_SER_MASK; | |
875 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { | |
876 strcat(library_path, common_path); | |
877 strcat(library_path, os::path_separator()); | |
878 inserted = 1; | |
879 } | |
880 strcat(library_path, path->dls_name); | |
881 strcat(library_path, os::path_separator()); | |
882 } | |
883 // eliminate trailing path separator | |
884 library_path[strlen(library_path)-1] = '\0'; | |
885 } | |
886 | |
887 // happens before argument parsing - can't use a trace flag | |
888 // tty->print_raw("init_system_properties_values: native lib path: "); | |
889 // tty->print_raw_cr(library_path); | |
890 | |
891 // callee copies into its own buffer | |
892 Arguments::set_library_path(library_path); | |
893 | |
894 free(common_path); | |
895 free(library_path); | |
896 free(info); | |
897 } | |
898 | |
899 /* | |
900 * Extensions directories. | |
901 * | |
902 * Note that the space for the colon and the trailing null are provided | |
903 * by the nulls included by the sizeof operator (so actually one byte more | |
904 * than necessary is allocated). | |
905 */ | |
906 { | |
907 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + | |
908 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + | |
909 sizeof(EXTENSIONS_DIR)); | |
910 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, | |
911 Arguments::get_java_home()); | |
912 Arguments::set_ext_dirs(buf); | |
913 } | |
914 | |
915 /* Endorsed standards default directory. */ | |
916 { | |
917 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); | |
918 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); | |
919 Arguments::set_endorsed_dirs(buf); | |
920 } | |
921 } | |
922 | |
923 #undef malloc | |
924 #undef free | |
925 #undef getenv | |
926 #undef EXTENSIONS_DIR | |
927 #undef ENDORSED_DIR | |
928 #undef COMMON_DIR | |
929 | |
930 } | |
931 | |
932 void os::breakpoint() { | |
933 BREAKPOINT; | |
934 } | |
935 | |
936 bool os::obsolete_option(const JavaVMOption *option) | |
937 { | |
938 if (!strncmp(option->optionString, "-Xt", 3)) { | |
939 return true; | |
940 } else if (!strncmp(option->optionString, "-Xtm", 4)) { | |
941 return true; | |
942 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { | |
943 return true; | |
944 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { | |
945 return true; | |
946 } | |
947 return false; | |
948 } | |
949 | |
950 bool os::Solaris::valid_stack_address(Thread* thread, address sp) { | |
951 address stackStart = (address)thread->stack_base(); | |
952 address stackEnd = (address)(stackStart - (address)thread->stack_size()); | |
953 if (sp < stackStart && sp >= stackEnd ) return true; | |
954 return false; | |
955 } | |
956 | |
957 extern "C" void breakpoint() { | |
958 // use debugger to set breakpoint here | |
959 } | |
960 | |
961 // Returns an estimate of the current stack pointer. Result must be guaranteed to | |
962 // point into the calling threads stack, and be no lower than the current stack | |
963 // pointer. | |
964 address os::current_stack_pointer() { | |
965 volatile int dummy; | |
966 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right | |
967 return sp; | |
968 } | |
969 | |
970 static thread_t main_thread; | |
971 | |
972 // Thread start routine for all new Java threads | |
973 extern "C" void* java_start(void* thread_addr) { | |
974 // Try to randomize the cache line index of hot stack frames. | |
975 // This helps when threads of the same stack traces evict each other's | |
976 // cache lines. The threads can be either from the same JVM instance, or | |
977 // from different JVM instances. The benefit is especially true for | |
978 // processors with hyperthreading technology. | |
979 static int counter = 0; | |
980 int pid = os::current_process_id(); | |
981 alloca(((pid ^ counter++) & 7) * 128); | |
982 | |
983 int prio; | |
984 Thread* thread = (Thread*)thread_addr; | |
985 OSThread* osthr = thread->osthread(); | |
986 | |
987 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound | |
988 thread->_schedctl = (void *) schedctl_init () ; | |
989 | |
990 if (UseNUMA) { | |
991 int lgrp_id = os::numa_get_group_id(); | |
992 if (lgrp_id != -1) { | |
993 thread->set_lgrp_id(lgrp_id); | |
994 } | |
995 } | |
996 | |
997 // If the creator called set priority before we started, | |
998 // we need to call set priority now that we have an lwp. | |
999 // Get the priority from libthread and set the priority | |
1000 // for the new Solaris lwp. | |
1001 if ( osthr->thread_id() != -1 ) { | |
1002 if ( UseThreadPriorities ) { | |
1003 thr_getprio(osthr->thread_id(), &prio); | |
1004 if (ThreadPriorityVerbose) { | |
1005 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", | |
1006 osthr->thread_id(), osthr->lwp_id(), prio ); | |
1007 } | |
1008 os::set_native_priority(thread, prio); | |
1009 } | |
1010 } else if (ThreadPriorityVerbose) { | |
1011 warning("Can't set priority in _start routine, thread id hasn't been set\n"); | |
1012 } | |
1013 | |
1014 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); | |
1015 | |
1016 // initialize signal mask for this thread | |
1017 os::Solaris::hotspot_sigmask(thread); | |
1018 | |
1019 thread->run(); | |
1020 | |
1021 // One less thread is executing | |
1022 // When the VMThread gets here, the main thread may have already exited | |
1023 // which frees the CodeHeap containing the Atomic::dec code | |
1024 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { | |
1025 Atomic::dec(&os::Solaris::_os_thread_count); | |
1026 } | |
1027 | |
1028 if (UseDetachedThreads) { | |
1029 thr_exit(NULL); | |
1030 ShouldNotReachHere(); | |
1031 } | |
1032 return NULL; | |
1033 } | |
1034 | |
1035 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { | |
1036 // Allocate the OSThread object | |
1037 OSThread* osthread = new OSThread(NULL, NULL); | |
1038 if (osthread == NULL) return NULL; | |
1039 | |
1040 // Store info on the Solaris thread into the OSThread | |
1041 osthread->set_thread_id(thread_id); | |
1042 osthread->set_lwp_id(_lwp_self()); | |
1043 thread->_schedctl = (void *) schedctl_init () ; | |
1044 | |
1045 if (UseNUMA) { | |
1046 int lgrp_id = os::numa_get_group_id(); | |
1047 if (lgrp_id != -1) { | |
1048 thread->set_lgrp_id(lgrp_id); | |
1049 } | |
1050 } | |
1051 | |
1052 if ( ThreadPriorityVerbose ) { | |
1053 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", | |
1054 osthread->thread_id(), osthread->lwp_id() ); | |
1055 } | |
1056 | |
1057 // Initial thread state is INITIALIZED, not SUSPENDED | |
1058 osthread->set_state(INITIALIZED); | |
1059 | |
1060 return osthread; | |
1061 } | |
1062 | |
1063 void os::Solaris::hotspot_sigmask(Thread* thread) { | |
1064 | |
1065 //Save caller's signal mask | |
1066 sigset_t sigmask; | |
1067 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); | |
1068 OSThread *osthread = thread->osthread(); | |
1069 osthread->set_caller_sigmask(sigmask); | |
1070 | |
1071 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); | |
1072 if (!ReduceSignalUsage) { | |
1073 if (thread->is_VM_thread()) { | |
1074 // Only the VM thread handles BREAK_SIGNAL ... | |
1075 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); | |
1076 } else { | |
1077 // ... all other threads block BREAK_SIGNAL | |
1078 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); | |
1079 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); | |
1080 } | |
1081 } | |
1082 } | |
1083 | |
1084 bool os::create_attached_thread(JavaThread* thread) { | |
1085 #ifdef ASSERT | |
1086 thread->verify_not_published(); | |
1087 #endif | |
1088 OSThread* osthread = create_os_thread(thread, thr_self()); | |
1089 if (osthread == NULL) { | |
1090 return false; | |
1091 } | |
1092 | |
1093 // Initial thread state is RUNNABLE | |
1094 osthread->set_state(RUNNABLE); | |
1095 thread->set_osthread(osthread); | |
1096 | |
1097 // initialize signal mask for this thread | |
1098 // and save the caller's signal mask | |
1099 os::Solaris::hotspot_sigmask(thread); | |
1100 | |
1101 return true; | |
1102 } | |
1103 | |
1104 bool os::create_main_thread(JavaThread* thread) { | |
1105 #ifdef ASSERT | |
1106 thread->verify_not_published(); | |
1107 #endif | |
1108 if (_starting_thread == NULL) { | |
1109 _starting_thread = create_os_thread(thread, main_thread); | |
1110 if (_starting_thread == NULL) { | |
1111 return false; | |
1112 } | |
1113 } | |
1114 | |
1115 // The primodial thread is runnable from the start | |
1116 _starting_thread->set_state(RUNNABLE); | |
1117 | |
1118 thread->set_osthread(_starting_thread); | |
1119 | |
1120 // initialize signal mask for this thread | |
1121 // and save the caller's signal mask | |
1122 os::Solaris::hotspot_sigmask(thread); | |
1123 | |
1124 return true; | |
1125 } | |
1126 | |
1127 // _T2_libthread is true if we believe we are running with the newer | |
1128 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default) | |
1129 bool os::Solaris::_T2_libthread = false; | |
1130 | |
1131 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
1132 // Allocate the OSThread object | |
1133 OSThread* osthread = new OSThread(NULL, NULL); | |
1134 if (osthread == NULL) { | |
1135 return false; | |
1136 } | |
1137 | |
1138 if ( ThreadPriorityVerbose ) { | |
1139 char *thrtyp; | |
1140 switch ( thr_type ) { | |
1141 case vm_thread: | |
1142 thrtyp = (char *)"vm"; | |
1143 break; | |
1144 case cgc_thread: | |
1145 thrtyp = (char *)"cgc"; | |
1146 break; | |
1147 case pgc_thread: | |
1148 thrtyp = (char *)"pgc"; | |
1149 break; | |
1150 case java_thread: | |
1151 thrtyp = (char *)"java"; | |
1152 break; | |
1153 case compiler_thread: | |
1154 thrtyp = (char *)"compiler"; | |
1155 break; | |
1156 case watcher_thread: | |
1157 thrtyp = (char *)"watcher"; | |
1158 break; | |
1159 default: | |
1160 thrtyp = (char *)"unknown"; | |
1161 break; | |
1162 } | |
1163 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); | |
1164 } | |
1165 | |
1166 // Calculate stack size if it's not specified by caller. | |
1167 if (stack_size == 0) { | |
1168 // The default stack size 1M (2M for LP64). | |
1169 stack_size = (BytesPerWord >> 2) * K * K; | |
1170 | |
1171 switch (thr_type) { | |
1172 case os::java_thread: | |
1173 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss | |
1174 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); | |
1175 break; | |
1176 case os::compiler_thread: | |
1177 if (CompilerThreadStackSize > 0) { | |
1178 stack_size = (size_t)(CompilerThreadStackSize * K); | |
1179 break; | |
1180 } // else fall through: | |
1181 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
1182 case os::vm_thread: | |
1183 case os::pgc_thread: | |
1184 case os::cgc_thread: | |
1185 case os::watcher_thread: | |
1186 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
1187 break; | |
1188 } | |
1189 } | |
1190 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); | |
1191 | |
1192 // Initial state is ALLOCATED but not INITIALIZED | |
1193 osthread->set_state(ALLOCATED); | |
1194 | |
1195 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { | |
1196 // We got lots of threads. Check if we still have some address space left. | |
1197 // Need to be at least 5Mb of unreserved address space. We do check by | |
1198 // trying to reserve some. | |
1199 const size_t VirtualMemoryBangSize = 20*K*K; | |
1200 char* mem = os::reserve_memory(VirtualMemoryBangSize); | |
1201 if (mem == NULL) { | |
1202 delete osthread; | |
1203 return false; | |
1204 } else { | |
1205 // Release the memory again | |
1206 os::release_memory(mem, VirtualMemoryBangSize); | |
1207 } | |
1208 } | |
1209 | |
1210 // Setup osthread because the child thread may need it. | |
1211 thread->set_osthread(osthread); | |
1212 | |
1213 // Create the Solaris thread | |
1214 // explicit THR_BOUND for T2_libthread case in case | |
1215 // that assumption is not accurate, but our alternate signal stack | |
1216 // handling is based on it which must have bound threads | |
1217 thread_t tid = 0; | |
1218 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED | |
1219 | ((UseBoundThreads || os::Solaris::T2_libthread() || | |
1220 (thr_type == vm_thread) || | |
1221 (thr_type == cgc_thread) || | |
1222 (thr_type == pgc_thread) || | |
1223 (thr_type == compiler_thread && BackgroundCompilation)) ? | |
1224 THR_BOUND : 0); | |
1225 int status; | |
1226 | |
1227 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. | |
1228 // | |
1229 // On multiprocessors systems, libthread sometimes under-provisions our | |
1230 // process with LWPs. On a 30-way systems, for instance, we could have | |
1231 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned | |
1232 // to our process. This can result in under utilization of PEs. | |
1233 // I suspect the problem is related to libthread's LWP | |
1234 // pool management and to the kernel's SIGBLOCKING "last LWP parked" | |
1235 // upcall policy. | |
1236 // | |
1237 // The following code is palliative -- it attempts to ensure that our | |
1238 // process has sufficient LWPs to take advantage of multiple PEs. | |
1239 // Proper long-term cures include using user-level threads bound to LWPs | |
1240 // (THR_BOUND) or using LWP-based synchronization. Note that there is a | |
1241 // slight timing window with respect to sampling _os_thread_count, but | |
1242 // the race is benign. Also, we should periodically recompute | |
1243 // _processors_online as the min of SC_NPROCESSORS_ONLN and the | |
1244 // the number of PEs in our partition. You might be tempted to use | |
1245 // THR_NEW_LWP here, but I'd recommend against it as that could | |
1246 // result in undesirable growth of the libthread's LWP pool. | |
1247 // The fix below isn't sufficient; for instance, it doesn't take into count | |
1248 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. | |
1249 // | |
1250 // Some pathologies this scheme doesn't handle: | |
1251 // * Threads can block, releasing the LWPs. The LWPs can age out. | |
1252 // When a large number of threads become ready again there aren't | |
1253 // enough LWPs available to service them. This can occur when the | |
1254 // number of ready threads oscillates. | |
1255 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. | |
1256 // | |
1257 // Finally, we should call thr_setconcurrency() periodically to refresh | |
1258 // the LWP pool and thwart the LWP age-out mechanism. | |
1259 // The "+3" term provides a little slop -- we want to slightly overprovision. | |
1260 | |
1261 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { | |
1262 if (!(flags & THR_BOUND)) { | |
1263 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation | |
1264 } | |
1265 } | |
1266 // Although this doesn't hurt, we should warn of undefined behavior | |
1267 // when using unbound T1 threads with schedctl(). This should never | |
1268 // happen, as the compiler and VM threads are always created bound | |
1269 DEBUG_ONLY( | |
1270 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && | |
1271 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && | |
1272 ((thr_type == vm_thread) || (thr_type == cgc_thread) || | |
1273 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { | |
1274 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); | |
1275 } | |
1276 ); | |
1277 | |
1278 | |
1279 // Mark that we don't have an lwp or thread id yet. | |
1280 // In case we attempt to set the priority before the thread starts. | |
1281 osthread->set_lwp_id(-1); | |
1282 osthread->set_thread_id(-1); | |
1283 | |
1284 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); | |
1285 if (status != 0) { | |
1286 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1287 perror("os::create_thread"); | |
1288 } | |
1289 thread->set_osthread(NULL); | |
1290 // Need to clean up stuff we've allocated so far | |
1291 delete osthread; | |
1292 return false; | |
1293 } | |
1294 | |
1295 Atomic::inc(&os::Solaris::_os_thread_count); | |
1296 | |
1297 // Store info on the Solaris thread into the OSThread | |
1298 osthread->set_thread_id(tid); | |
1299 | |
1300 // Remember that we created this thread so we can set priority on it | |
1301 osthread->set_vm_created(); | |
1302 | |
1303 // Set the default thread priority otherwise use NormalPriority | |
1304 | |
1305 if ( UseThreadPriorities ) { | |
1306 thr_setprio(tid, (DefaultThreadPriority == -1) ? | |
1307 java_to_os_priority[NormPriority] : | |
1308 DefaultThreadPriority); | |
1309 } | |
1310 | |
1311 // Initial thread state is INITIALIZED, not SUSPENDED | |
1312 osthread->set_state(INITIALIZED); | |
1313 | |
1314 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain | |
1315 return true; | |
1316 } | |
1317 | |
1318 /* defined for >= Solaris 10. This allows builds on earlier versions | |
1319 * of Solaris to take advantage of the newly reserved Solaris JVM signals | |
1320 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 | |
1321 * and -XX:+UseAltSigs does nothing since these should have no conflict | |
1322 */ | |
1323 #if !defined(SIGJVM1) | |
1324 #define SIGJVM1 39 | |
1325 #define SIGJVM2 40 | |
1326 #endif | |
1327 | |
1328 debug_only(static bool signal_sets_initialized = false); | |
1329 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
1330 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; | |
1331 int os::Solaris::_SIGasync = ASYNC_SIGNAL; | |
1332 | |
1333 bool os::Solaris::is_sig_ignored(int sig) { | |
1334 struct sigaction oact; | |
1335 sigaction(sig, (struct sigaction*)NULL, &oact); | |
1336 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
1337 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
1338 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
1339 return true; | |
1340 else | |
1341 return false; | |
1342 } | |
1343 | |
1344 // Note: SIGRTMIN is a macro that calls sysconf() so it will | |
1345 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime | |
1346 static bool isJVM1available() { | |
1347 return SIGJVM1 < SIGRTMIN; | |
1348 } | |
1349 | |
1350 void os::Solaris::signal_sets_init() { | |
1351 // Should also have an assertion stating we are still single-threaded. | |
1352 assert(!signal_sets_initialized, "Already initialized"); | |
1353 // Fill in signals that are necessarily unblocked for all threads in | |
1354 // the VM. Currently, we unblock the following signals: | |
1355 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
1356 // by -Xrs (=ReduceSignalUsage)); | |
1357 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
1358 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
1359 // the dispositions or masks wrt these signals. | |
1360 // Programs embedding the VM that want to use the above signals for their | |
1361 // own purposes must, at this time, use the "-Xrs" option to prevent | |
1362 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
1363 // (See bug 4345157, and other related bugs). | |
1364 // In reality, though, unblocking these signals is really a nop, since | |
1365 // these signals are not blocked by default. | |
1366 sigemptyset(&unblocked_sigs); | |
1367 sigemptyset(&allowdebug_blocked_sigs); | |
1368 sigaddset(&unblocked_sigs, SIGILL); | |
1369 sigaddset(&unblocked_sigs, SIGSEGV); | |
1370 sigaddset(&unblocked_sigs, SIGBUS); | |
1371 sigaddset(&unblocked_sigs, SIGFPE); | |
1372 | |
1373 if (isJVM1available) { | |
1374 os::Solaris::set_SIGinterrupt(SIGJVM1); | |
1375 os::Solaris::set_SIGasync(SIGJVM2); | |
1376 } else if (UseAltSigs) { | |
1377 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); | |
1378 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); | |
1379 } else { | |
1380 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); | |
1381 os::Solaris::set_SIGasync(ASYNC_SIGNAL); | |
1382 } | |
1383 | |
1384 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); | |
1385 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); | |
1386 | |
1387 if (!ReduceSignalUsage) { | |
1388 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
1389 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
1390 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
1391 } | |
1392 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
1393 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
1394 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
1395 } | |
1396 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
1397 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
1398 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
1399 } | |
1400 } | |
1401 // Fill in signals that are blocked by all but the VM thread. | |
1402 sigemptyset(&vm_sigs); | |
1403 if (!ReduceSignalUsage) | |
1404 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
1405 debug_only(signal_sets_initialized = true); | |
1406 | |
1407 // For diagnostics only used in run_periodic_checks | |
1408 sigemptyset(&check_signal_done); | |
1409 } | |
1410 | |
1411 // These are signals that are unblocked while a thread is running Java. | |
1412 // (For some reason, they get blocked by default.) | |
1413 sigset_t* os::Solaris::unblocked_signals() { | |
1414 assert(signal_sets_initialized, "Not initialized"); | |
1415 return &unblocked_sigs; | |
1416 } | |
1417 | |
1418 // These are the signals that are blocked while a (non-VM) thread is | |
1419 // running Java. Only the VM thread handles these signals. | |
1420 sigset_t* os::Solaris::vm_signals() { | |
1421 assert(signal_sets_initialized, "Not initialized"); | |
1422 return &vm_sigs; | |
1423 } | |
1424 | |
1425 // These are signals that are blocked during cond_wait to allow debugger in | |
1426 sigset_t* os::Solaris::allowdebug_blocked_signals() { | |
1427 assert(signal_sets_initialized, "Not initialized"); | |
1428 return &allowdebug_blocked_sigs; | |
1429 } | |
1430 | |
1431 // First crack at OS-specific initialization, from inside the new thread. | |
1432 void os::initialize_thread() { | |
1433 int r = thr_main() ; | |
1434 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; | |
1435 if (r) { | |
1436 JavaThread* jt = (JavaThread *)Thread::current(); | |
1437 assert(jt != NULL,"Sanity check"); | |
1438 size_t stack_size; | |
1439 address base = jt->stack_base(); | |
1440 if (Arguments::created_by_java_launcher()) { | |
1441 // Use 2MB to allow for Solaris 7 64 bit mode. | |
1442 stack_size = JavaThread::stack_size_at_create() == 0 | |
1443 ? 2048*K : JavaThread::stack_size_at_create(); | |
1444 | |
1445 // There are rare cases when we may have already used more than | |
1446 // the basic stack size allotment before this method is invoked. | |
1447 // Attempt to allow for a normally sized java_stack. | |
1448 size_t current_stack_offset = (size_t)(base - (address)&stack_size); | |
1449 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); | |
1450 } else { | |
1451 // 6269555: If we were not created by a Java launcher, i.e. if we are | |
1452 // running embedded in a native application, treat the primordial thread | |
1453 // as much like a native attached thread as possible. This means using | |
1454 // the current stack size from thr_stksegment(), unless it is too large | |
1455 // to reliably setup guard pages. A reasonable max size is 8MB. | |
1456 size_t current_size = current_stack_size(); | |
1457 // This should never happen, but just in case.... | |
1458 if (current_size == 0) current_size = 2 * K * K; | |
1459 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; | |
1460 } | |
1461 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; | |
1462 stack_size = (size_t)(base - bottom); | |
1463 | |
1464 assert(stack_size > 0, "Stack size calculation problem"); | |
1465 | |
1466 if (stack_size > jt->stack_size()) { | |
1467 NOT_PRODUCT( | |
1468 struct rlimit limits; | |
1469 getrlimit(RLIMIT_STACK, &limits); | |
1470 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); | |
1471 assert(size >= jt->stack_size(), "Stack size problem in main thread"); | |
1472 ) | |
1473 tty->print_cr( | |
1474 "Stack size of %d Kb exceeds current limit of %d Kb.\n" | |
1475 "(Stack sizes are rounded up to a multiple of the system page size.)\n" | |
1476 "See limit(1) to increase the stack size limit.", | |
1477 stack_size / K, jt->stack_size() / K); | |
1478 vm_exit(1); | |
1479 } | |
1480 assert(jt->stack_size() >= stack_size, | |
1481 "Attempt to map more stack than was allocated"); | |
1482 jt->set_stack_size(stack_size); | |
1483 } | |
1484 | |
1485 // 5/22/01: Right now alternate signal stacks do not handle | |
1486 // throwing stack overflow exceptions, see bug 4463178 | |
1487 // Until a fix is found for this, T2 will NOT imply alternate signal | |
1488 // stacks. | |
1489 // If using T2 libthread threads, install an alternate signal stack. | |
1490 // Because alternate stacks associate with LWPs on Solaris, | |
1491 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads | |
1492 // we prefer to explicitly stack bang. | |
1493 // If not using T2 libthread, but using UseBoundThreads any threads | |
1494 // (primordial thread, jni_attachCurrentThread) we do not create, | |
1495 // probably are not bound, therefore they can not have an alternate | |
1496 // signal stack. Since our stack banging code is generated and | |
1497 // is shared across threads, all threads must be bound to allow | |
1498 // using alternate signal stacks. The alternative is to interpose | |
1499 // on _lwp_create to associate an alt sig stack with each LWP, | |
1500 // and this could be a problem when the JVM is embedded. | |
1501 // We would prefer to use alternate signal stacks with T2 | |
1502 // Since there is currently no accurate way to detect T2 | |
1503 // we do not. Assuming T2 when running T1 causes sig 11s or assertions | |
1504 // on installing alternate signal stacks | |
1505 | |
1506 | |
1507 // 05/09/03: removed alternate signal stack support for Solaris | |
1508 // The alternate signal stack mechanism is no longer needed to | |
1509 // handle stack overflow. This is now handled by allocating | |
1510 // guard pages (red zone) and stackbanging. | |
1511 // Initially the alternate signal stack mechanism was removed because | |
1512 // it did not work with T1 llibthread. Alternate | |
1513 // signal stacks MUST have all threads bound to lwps. Applications | |
1514 // can create their own threads and attach them without their being | |
1515 // bound under T1. This is frequently the case for the primordial thread. | |
1516 // If we were ever to reenable this mechanism we would need to | |
1517 // use the dynamic check for T2 libthread. | |
1518 | |
1519 os::Solaris::init_thread_fpu_state(); | |
1520 } | |
1521 | |
1522 | |
1523 | |
1524 // Free Solaris resources related to the OSThread | |
1525 void os::free_thread(OSThread* osthread) { | |
1526 assert(osthread != NULL, "os::free_thread but osthread not set"); | |
1527 | |
1528 | |
1529 // We are told to free resources of the argument thread, | |
1530 // but we can only really operate on the current thread. | |
1531 // The main thread must take the VMThread down synchronously | |
1532 // before the main thread exits and frees up CodeHeap | |
1533 guarantee((Thread::current()->osthread() == osthread | |
1534 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); | |
1535 if (Thread::current()->osthread() == osthread) { | |
1536 // Restore caller's signal mask | |
1537 sigset_t sigmask = osthread->caller_sigmask(); | |
1538 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); | |
1539 } | |
1540 delete osthread; | |
1541 } | |
1542 | |
1543 void os::pd_start_thread(Thread* thread) { | |
1544 int status = thr_continue(thread->osthread()->thread_id()); | |
1545 assert_status(status == 0, status, "thr_continue failed"); | |
1546 } | |
1547 | |
1548 | |
1549 intx os::current_thread_id() { | |
1550 return (intx)thr_self(); | |
1551 } | |
1552 | |
1553 static pid_t _initial_pid = 0; | |
1554 | |
1555 int os::current_process_id() { | |
1556 return (int)(_initial_pid ? _initial_pid : getpid()); | |
1557 } | |
1558 | |
1559 int os::allocate_thread_local_storage() { | |
1560 // %%% in Win32 this allocates a memory segment pointed to by a | |
1561 // register. Dan Stein can implement a similar feature in | |
1562 // Solaris. Alternatively, the VM can do the same thing | |
1563 // explicitly: malloc some storage and keep the pointer in a | |
1564 // register (which is part of the thread's context) (or keep it | |
1565 // in TLS). | |
1566 // %%% In current versions of Solaris, thr_self and TSD can | |
1567 // be accessed via short sequences of displaced indirections. | |
1568 // The value of thr_self is available as %g7(36). | |
1569 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), | |
1570 // assuming that the current thread already has a value bound to k. | |
1571 // It may be worth experimenting with such access patterns, | |
1572 // and later having the parameters formally exported from a Solaris | |
1573 // interface. I think, however, that it will be faster to | |
1574 // maintain the invariant that %g2 always contains the | |
1575 // JavaThread in Java code, and have stubs simply | |
1576 // treat %g2 as a caller-save register, preserving it in a %lN. | |
1577 thread_key_t tk; | |
1578 if (thr_keycreate( &tk, NULL ) ) | |
1579 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); | |
1580 return int(tk); | |
1581 } | |
1582 | |
1583 void os::free_thread_local_storage(int index) { | |
1584 // %%% don't think we need anything here | |
1585 // if ( pthread_key_delete((pthread_key_t) tk) ) | |
1586 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); | |
1587 } | |
1588 | |
1589 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific | |
1590 // small number - point is NO swap space available | |
1591 void os::thread_local_storage_at_put(int index, void* value) { | |
1592 // %%% this is used only in threadLocalStorage.cpp | |
1593 if (thr_setspecific((thread_key_t)index, value)) { | |
1594 if (errno == ENOMEM) { | |
1595 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); | |
1596 } else { | |
1597 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); | |
1598 } | |
1599 } else { | |
1600 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; | |
1601 } | |
1602 } | |
1603 | |
1604 // This function could be called before TLS is initialized, for example, when | |
1605 // VM receives an async signal or when VM causes a fatal error during | |
1606 // initialization. Return NULL if thr_getspecific() fails. | |
1607 void* os::thread_local_storage_at(int index) { | |
1608 // %%% this is used only in threadLocalStorage.cpp | |
1609 void* r = NULL; | |
1610 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; | |
1611 } | |
1612 | |
1613 | |
1614 const int NANOSECS_PER_MILLISECS = 1000000; | |
1615 // gethrtime can move backwards if read from one cpu and then a different cpu | |
1616 // getTimeNanos is guaranteed to not move backward on Solaris | |
1617 // local spinloop created as faster for a CAS on an int than | |
1618 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not | |
1619 // supported on sparc v8 or pre supports_cx8 intel boxes. | |
1620 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong | |
1621 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes | |
1622 inline hrtime_t oldgetTimeNanos() { | |
1623 int gotlock = LOCK_INVALID; | |
1624 hrtime_t newtime = gethrtime(); | |
1625 | |
1626 for (;;) { | |
1627 // grab lock for max_hrtime | |
1628 int curlock = max_hrtime_lock; | |
1629 if (curlock & LOCK_BUSY) continue; | |
1630 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; | |
1631 if (newtime > max_hrtime) { | |
1632 max_hrtime = newtime; | |
1633 } else { | |
1634 newtime = max_hrtime; | |
1635 } | |
1636 // release lock | |
1637 max_hrtime_lock = LOCK_FREE; | |
1638 return newtime; | |
1639 } | |
1640 } | |
1641 // gethrtime can move backwards if read from one cpu and then a different cpu | |
1642 // getTimeNanos is guaranteed to not move backward on Solaris | |
1643 inline hrtime_t getTimeNanos() { | |
1644 if (VM_Version::supports_cx8()) { | |
499 | 1645 const hrtime_t now = gethrtime(); |
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1646 // Use atomic long load since 32-bit x86 uses 2 registers to keep long. |
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1647 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime); |
499 | 1648 if (now <= prev) return prev; // same or retrograde time; |
1649 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); | |
1650 assert(obsv >= prev, "invariant"); // Monotonicity | |
1651 // If the CAS succeeded then we're done and return "now". | |
1652 // If the CAS failed and the observed value "obs" is >= now then | |
1653 // we should return "obs". If the CAS failed and now > obs > prv then | |
1654 // some other thread raced this thread and installed a new value, in which case | |
1655 // we could either (a) retry the entire operation, (b) retry trying to install now | |
1656 // or (c) just return obs. We use (c). No loop is required although in some cases | |
1657 // we might discard a higher "now" value in deference to a slightly lower but freshly | |
1658 // installed obs value. That's entirely benign -- it admits no new orderings compared | |
1659 // to (a) or (b) -- and greatly reduces coherence traffic. | |
1660 // We might also condition (c) on the magnitude of the delta between obs and now. | |
1661 // Avoiding excessive CAS operations to hot RW locations is critical. | |
1662 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate | |
1663 return (prev == obsv) ? now : obsv ; | |
0 | 1664 } else { |
1665 return oldgetTimeNanos(); | |
1666 } | |
1667 } | |
1668 | |
1669 // Time since start-up in seconds to a fine granularity. | |
1670 // Used by VMSelfDestructTimer and the MemProfiler. | |
1671 double os::elapsedTime() { | |
1672 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; | |
1673 } | |
1674 | |
1675 jlong os::elapsed_counter() { | |
1676 return (jlong)(getTimeNanos() - first_hrtime); | |
1677 } | |
1678 | |
1679 jlong os::elapsed_frequency() { | |
1680 return hrtime_hz; | |
1681 } | |
1682 | |
1683 // Return the real, user, and system times in seconds from an | |
1684 // arbitrary fixed point in the past. | |
1685 bool os::getTimesSecs(double* process_real_time, | |
1686 double* process_user_time, | |
1687 double* process_system_time) { | |
1688 struct tms ticks; | |
1689 clock_t real_ticks = times(&ticks); | |
1690 | |
1691 if (real_ticks == (clock_t) (-1)) { | |
1692 return false; | |
1693 } else { | |
1694 double ticks_per_second = (double) clock_tics_per_sec; | |
1695 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
1696 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
1697 // For consistency return the real time from getTimeNanos() | |
1698 // converted to seconds. | |
1699 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); | |
1700 | |
1701 return true; | |
1702 } | |
1703 } | |
1704 | |
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1705 bool os::supports_vtime() { return true; } |
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1706 |
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1707 bool os::enable_vtime() { |
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1708 int fd = open("/proc/self/ctl", O_WRONLY); |
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1709 if (fd == -1) |
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1710 return false; |
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1711 |
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1712 long cmd[] = { PCSET, PR_MSACCT }; |
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1713 int res = write(fd, cmd, sizeof(long) * 2); |
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1714 close(fd); |
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1715 if (res != sizeof(long) * 2) |
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1716 return false; |
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1717 |
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1718 return true; |
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1719 } |
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1720 |
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1721 bool os::vtime_enabled() { |
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1722 int fd = open("/proc/self/status", O_RDONLY); |
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1723 if (fd == -1) |
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1724 return false; |
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1725 |
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1726 pstatus_t status; |
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1727 int res = read(fd, (void*) &status, sizeof(pstatus_t)); |
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1728 close(fd); |
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1729 if (res != sizeof(pstatus_t)) |
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1730 return false; |
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1731 |
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1732 return status.pr_flags & PR_MSACCT; |
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1733 } |
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1734 |
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1735 double os::elapsedVTime() { |
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1736 return (double)gethrvtime() / (double)hrtime_hz; |
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1737 } |
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1738 |
0 | 1739 // Used internally for comparisons only |
1740 // getTimeMillis guaranteed to not move backwards on Solaris | |
1741 jlong getTimeMillis() { | |
1742 jlong nanotime = getTimeNanos(); | |
1743 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); | |
1744 } | |
1745 | |
61 | 1746 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis |
1747 jlong os::javaTimeMillis() { | |
0 | 1748 timeval t; |
1749 if (gettimeofday( &t, NULL) == -1) | |
61 | 1750 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); |
0 | 1751 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; |
1752 } | |
1753 | |
1754 jlong os::javaTimeNanos() { | |
1755 return (jlong)getTimeNanos(); | |
1756 } | |
1757 | |
1758 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
1759 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits | |
1760 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
1761 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
1762 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
1763 } | |
1764 | |
1765 char * os::local_time_string(char *buf, size_t buflen) { | |
1766 struct tm t; | |
1767 time_t long_time; | |
1768 time(&long_time); | |
1769 localtime_r(&long_time, &t); | |
1770 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
1771 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
1772 t.tm_hour, t.tm_min, t.tm_sec); | |
1773 return buf; | |
1774 } | |
1775 | |
1776 // Note: os::shutdown() might be called very early during initialization, or | |
1777 // called from signal handler. Before adding something to os::shutdown(), make | |
1778 // sure it is async-safe and can handle partially initialized VM. | |
1779 void os::shutdown() { | |
1780 | |
1781 // allow PerfMemory to attempt cleanup of any persistent resources | |
1782 perfMemory_exit(); | |
1783 | |
1784 // needs to remove object in file system | |
1785 AttachListener::abort(); | |
1786 | |
1787 // flush buffered output, finish log files | |
1788 ostream_abort(); | |
1789 | |
1790 // Check for abort hook | |
1791 abort_hook_t abort_hook = Arguments::abort_hook(); | |
1792 if (abort_hook != NULL) { | |
1793 abort_hook(); | |
1794 } | |
1795 } | |
1796 | |
1797 // Note: os::abort() might be called very early during initialization, or | |
1798 // called from signal handler. Before adding something to os::abort(), make | |
1799 // sure it is async-safe and can handle partially initialized VM. | |
1800 void os::abort(bool dump_core) { | |
1801 os::shutdown(); | |
1802 if (dump_core) { | |
1803 #ifndef PRODUCT | |
1804 fdStream out(defaultStream::output_fd()); | |
1805 out.print_raw("Current thread is "); | |
1806 char buf[16]; | |
1807 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
1808 out.print_raw_cr(buf); | |
1809 out.print_raw_cr("Dumping core ..."); | |
1810 #endif | |
1811 ::abort(); // dump core (for debugging) | |
1812 } | |
1813 | |
1814 ::exit(1); | |
1815 } | |
1816 | |
1817 // Die immediately, no exit hook, no abort hook, no cleanup. | |
1818 void os::die() { | |
1819 _exit(-1); | |
1820 } | |
1821 | |
1822 // unused | |
1823 void os::set_error_file(const char *logfile) {} | |
1824 | |
1825 // DLL functions | |
1826 | |
1827 const char* os::dll_file_extension() { return ".so"; } | |
1828 | |
1829 const char* os::get_temp_directory() { return "/tmp/"; } | |
1830 | |
691 | 1831 static bool file_exists(const char* filename) { |
1832 struct stat statbuf; | |
1833 if (filename == NULL || strlen(filename) == 0) { | |
1834 return false; | |
1835 } | |
1836 return os::stat(filename, &statbuf) == 0; | |
1837 } | |
1838 | |
1839 void os::dll_build_name(char* buffer, size_t buflen, | |
1840 const char* pname, const char* fname) { | |
1841 // Copied from libhpi | |
242 | 1842 const size_t pnamelen = pname ? strlen(pname) : 0; |
1843 | |
691 | 1844 // Quietly truncate on buffer overflow. Should be an error. |
242 | 1845 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { |
1846 *buffer = '\0'; | |
1847 return; | |
1848 } | |
1849 | |
1850 if (pnamelen == 0) { | |
691 | 1851 snprintf(buffer, buflen, "lib%s.so", fname); |
1852 } else if (strchr(pname, *os::path_separator()) != NULL) { | |
1853 int n; | |
1854 char** pelements = split_path(pname, &n); | |
1855 for (int i = 0 ; i < n ; i++) { | |
1856 // really shouldn't be NULL but what the heck, check can't hurt | |
1857 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { | |
1858 continue; // skip the empty path values | |
1859 } | |
1860 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); | |
1861 if (file_exists(buffer)) { | |
1862 break; | |
1863 } | |
1864 } | |
1865 // release the storage | |
1866 for (int i = 0 ; i < n ; i++) { | |
1867 if (pelements[i] != NULL) { | |
1868 FREE_C_HEAP_ARRAY(char, pelements[i]); | |
1869 } | |
1870 } | |
1871 if (pelements != NULL) { | |
1872 FREE_C_HEAP_ARRAY(char*, pelements); | |
1873 } | |
242 | 1874 } else { |
691 | 1875 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); |
242 | 1876 } |
1877 } | |
1878 | |
0 | 1879 const char* os::get_current_directory(char *buf, int buflen) { |
1880 return getcwd(buf, buflen); | |
1881 } | |
1882 | |
1883 // check if addr is inside libjvm[_g].so | |
1884 bool os::address_is_in_vm(address addr) { | |
1885 static address libjvm_base_addr; | |
1886 Dl_info dlinfo; | |
1887 | |
1888 if (libjvm_base_addr == NULL) { | |
1889 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); | |
1890 libjvm_base_addr = (address)dlinfo.dli_fbase; | |
1891 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); | |
1892 } | |
1893 | |
1894 if (dladdr((void *)addr, &dlinfo)) { | |
1895 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; | |
1896 } | |
1897 | |
1898 return false; | |
1899 } | |
1900 | |
1901 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); | |
1902 static dladdr1_func_type dladdr1_func = NULL; | |
1903 | |
1904 bool os::dll_address_to_function_name(address addr, char *buf, | |
1905 int buflen, int * offset) { | |
1906 Dl_info dlinfo; | |
1907 | |
1908 // dladdr1_func was initialized in os::init() | |
1909 if (dladdr1_func){ | |
1910 // yes, we have dladdr1 | |
1911 | |
1912 // Support for dladdr1 is checked at runtime; it may be | |
1913 // available even if the vm is built on a machine that does | |
1914 // not have dladdr1 support. Make sure there is a value for | |
1915 // RTLD_DL_SYMENT. | |
1916 #ifndef RTLD_DL_SYMENT | |
1917 #define RTLD_DL_SYMENT 1 | |
1918 #endif | |
1919 Sym * info; | |
1920 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, | |
1921 RTLD_DL_SYMENT)) { | |
1922 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); | |
1923 if (offset) *offset = addr - (address)dlinfo.dli_saddr; | |
1924 | |
1925 // check if the returned symbol really covers addr | |
1926 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); | |
1927 } else { | |
1928 if (buf) buf[0] = '\0'; | |
1929 if (offset) *offset = -1; | |
1930 return false; | |
1931 } | |
1932 } else { | |
1933 // no, only dladdr is available | |
1934 if(dladdr((void *)addr, &dlinfo)) { | |
1935 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); | |
1936 if (offset) *offset = addr - (address)dlinfo.dli_saddr; | |
1937 return true; | |
1938 } else { | |
1939 if (buf) buf[0] = '\0'; | |
1940 if (offset) *offset = -1; | |
1941 return false; | |
1942 } | |
1943 } | |
1944 } | |
1945 | |
1946 bool os::dll_address_to_library_name(address addr, char* buf, | |
1947 int buflen, int* offset) { | |
1948 Dl_info dlinfo; | |
1949 | |
1950 if (dladdr((void*)addr, &dlinfo)){ | |
1951 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); | |
1952 if (offset) *offset = addr - (address)dlinfo.dli_fbase; | |
1953 return true; | |
1954 } else { | |
1955 if (buf) buf[0] = '\0'; | |
1956 if (offset) *offset = -1; | |
1957 return false; | |
1958 } | |
1959 } | |
1960 | |
1961 // Prints the names and full paths of all opened dynamic libraries | |
1962 // for current process | |
1963 void os::print_dll_info(outputStream * st) { | |
1964 Dl_info dli; | |
1965 void *handle; | |
1966 Link_map *map; | |
1967 Link_map *p; | |
1968 | |
1969 st->print_cr("Dynamic libraries:"); st->flush(); | |
1970 | |
1971 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { | |
1972 st->print_cr("Error: Cannot print dynamic libraries."); | |
1973 return; | |
1974 } | |
1975 handle = dlopen(dli.dli_fname, RTLD_LAZY); | |
1976 if (handle == NULL) { | |
1977 st->print_cr("Error: Cannot print dynamic libraries."); | |
1978 return; | |
1979 } | |
1980 dlinfo(handle, RTLD_DI_LINKMAP, &map); | |
1981 if (map == NULL) { | |
1982 st->print_cr("Error: Cannot print dynamic libraries."); | |
1983 return; | |
1984 } | |
1985 | |
1986 while (map->l_prev != NULL) | |
1987 map = map->l_prev; | |
1988 | |
1989 while (map != NULL) { | |
1990 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); | |
1991 map = map->l_next; | |
1992 } | |
1993 | |
1994 dlclose(handle); | |
1995 } | |
1996 | |
1997 // Loads .dll/.so and | |
1998 // in case of error it checks if .dll/.so was built for the | |
1999 // same architecture as Hotspot is running on | |
2000 | |
2001 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) | |
2002 { | |
2003 void * result= ::dlopen(filename, RTLD_LAZY); | |
2004 if (result != NULL) { | |
2005 // Successful loading | |
2006 return result; | |
2007 } | |
2008 | |
2009 Elf32_Ehdr elf_head; | |
2010 | |
2011 // Read system error message into ebuf | |
2012 // It may or may not be overwritten below | |
2013 ::strncpy(ebuf, ::dlerror(), ebuflen-1); | |
2014 ebuf[ebuflen-1]='\0'; | |
2015 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
2016 char* diag_msg_buf=ebuf+strlen(ebuf); | |
2017 | |
2018 if (diag_msg_max_length==0) { | |
2019 // No more space in ebuf for additional diagnostics message | |
2020 return NULL; | |
2021 } | |
2022 | |
2023 | |
2024 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
2025 | |
2026 if (file_descriptor < 0) { | |
2027 // Can't open library, report dlerror() message | |
2028 return NULL; | |
2029 } | |
2030 | |
2031 bool failed_to_read_elf_head= | |
2032 (sizeof(elf_head)!= | |
2033 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
2034 | |
2035 ::close(file_descriptor); | |
2036 if (failed_to_read_elf_head) { | |
2037 // file i/o error - report dlerror() msg | |
2038 return NULL; | |
2039 } | |
2040 | |
2041 typedef struct { | |
2042 Elf32_Half code; // Actual value as defined in elf.h | |
2043 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
2044 char elf_class; // 32 or 64 bit | |
2045 char endianess; // MSB or LSB | |
2046 char* name; // String representation | |
2047 } arch_t; | |
2048 | |
2049 static const arch_t arch_array[]={ | |
2050 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
2051 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
2052 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
2053 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
2054 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
2055 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
2056 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
2057 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
2058 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} | |
2059 }; | |
2060 | |
2061 #if (defined IA32) | |
2062 static Elf32_Half running_arch_code=EM_386; | |
2063 #elif (defined AMD64) | |
2064 static Elf32_Half running_arch_code=EM_X86_64; | |
2065 #elif (defined IA64) | |
2066 static Elf32_Half running_arch_code=EM_IA_64; | |
2067 #elif (defined __sparc) && (defined _LP64) | |
2068 static Elf32_Half running_arch_code=EM_SPARCV9; | |
2069 #elif (defined __sparc) && (!defined _LP64) | |
2070 static Elf32_Half running_arch_code=EM_SPARC; | |
2071 #elif (defined __powerpc64__) | |
2072 static Elf32_Half running_arch_code=EM_PPC64; | |
2073 #elif (defined __powerpc__) | |
2074 static Elf32_Half running_arch_code=EM_PPC; | |
2075 #else | |
2076 #error Method os::dll_load requires that one of following is defined:\ | |
2077 IA32, AMD64, IA64, __sparc, __powerpc__ | |
2078 #endif | |
2079 | |
2080 // Identify compatability class for VM's architecture and library's architecture | |
2081 // Obtain string descriptions for architectures | |
2082 | |
2083 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
2084 int running_arch_index=-1; | |
2085 | |
2086 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
2087 if (running_arch_code == arch_array[i].code) { | |
2088 running_arch_index = i; | |
2089 } | |
2090 if (lib_arch.code == arch_array[i].code) { | |
2091 lib_arch.compat_class = arch_array[i].compat_class; | |
2092 lib_arch.name = arch_array[i].name; | |
2093 } | |
2094 } | |
2095 | |
2096 assert(running_arch_index != -1, | |
2097 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
2098 if (running_arch_index == -1) { | |
2099 // Even though running architecture detection failed | |
2100 // we may still continue with reporting dlerror() message | |
2101 return NULL; | |
2102 } | |
2103 | |
2104 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
2105 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
2106 return NULL; | |
2107 } | |
2108 | |
2109 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { | |
2110 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
2111 return NULL; | |
2112 } | |
2113 | |
2114 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
2115 if ( lib_arch.name!=NULL ) { | |
2116 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
2117 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
2118 lib_arch.name, arch_array[running_arch_index].name); | |
2119 } else { | |
2120 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
2121 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
2122 lib_arch.code, | |
2123 arch_array[running_arch_index].name); | |
2124 } | |
2125 } | |
2126 | |
2127 return NULL; | |
2128 } | |
2129 | |
242 | 2130 void* os::dll_lookup(void* handle, const char* name) { |
2131 return dlsym(handle, name); | |
2132 } | |
0 | 2133 |
2134 | |
2135 bool _print_ascii_file(const char* filename, outputStream* st) { | |
2136 int fd = open(filename, O_RDONLY); | |
2137 if (fd == -1) { | |
2138 return false; | |
2139 } | |
2140 | |
2141 char buf[32]; | |
2142 int bytes; | |
2143 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { | |
2144 st->print_raw(buf, bytes); | |
2145 } | |
2146 | |
2147 close(fd); | |
2148 | |
2149 return true; | |
2150 } | |
2151 | |
2152 void os::print_os_info(outputStream* st) { | |
2153 st->print("OS:"); | |
2154 | |
2155 if (!_print_ascii_file("/etc/release", st)) { | |
2156 st->print("Solaris"); | |
2157 } | |
2158 st->cr(); | |
2159 | |
2160 // kernel | |
2161 st->print("uname:"); | |
2162 struct utsname name; | |
2163 uname(&name); | |
2164 st->print(name.sysname); st->print(" "); | |
2165 st->print(name.release); st->print(" "); | |
2166 st->print(name.version); st->print(" "); | |
2167 st->print(name.machine); | |
2168 | |
2169 // libthread | |
2170 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); | |
2171 else st->print(" (T1 libthread)"); | |
2172 st->cr(); | |
2173 | |
2174 // rlimit | |
2175 st->print("rlimit:"); | |
2176 struct rlimit rlim; | |
2177 | |
2178 st->print(" STACK "); | |
2179 getrlimit(RLIMIT_STACK, &rlim); | |
2180 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
2181 else st->print("%uk", rlim.rlim_cur >> 10); | |
2182 | |
2183 st->print(", CORE "); | |
2184 getrlimit(RLIMIT_CORE, &rlim); | |
2185 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
2186 else st->print("%uk", rlim.rlim_cur >> 10); | |
2187 | |
2188 st->print(", NOFILE "); | |
2189 getrlimit(RLIMIT_NOFILE, &rlim); | |
2190 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
2191 else st->print("%d", rlim.rlim_cur); | |
2192 | |
2193 st->print(", AS "); | |
2194 getrlimit(RLIMIT_AS, &rlim); | |
2195 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); | |
2196 else st->print("%uk", rlim.rlim_cur >> 10); | |
2197 st->cr(); | |
2198 | |
2199 // load average | |
2200 st->print("load average:"); | |
2201 double loadavg[3]; | |
2202 os::loadavg(loadavg, 3); | |
2203 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); | |
2204 st->cr(); | |
2205 } | |
2206 | |
2207 | |
2208 static bool check_addr0(outputStream* st) { | |
2209 jboolean status = false; | |
2210 int fd = open("/proc/self/map",O_RDONLY); | |
2211 if (fd >= 0) { | |
2212 prmap_t p; | |
2213 while(read(fd, &p, sizeof(p)) > 0) { | |
2214 if (p.pr_vaddr == 0x0) { | |
2215 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); | |
2216 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); | |
2217 st->print("Access:"); | |
2218 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); | |
2219 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); | |
2220 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); | |
2221 st->cr(); | |
2222 status = true; | |
2223 } | |
2224 close(fd); | |
2225 } | |
2226 } | |
2227 return status; | |
2228 } | |
2229 | |
2230 void os::print_memory_info(outputStream* st) { | |
2231 st->print("Memory:"); | |
2232 st->print(" %dk page", os::vm_page_size()>>10); | |
2233 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); | |
2234 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); | |
2235 st->cr(); | |
2236 (void) check_addr0(st); | |
2237 } | |
2238 | |
2239 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific | |
2240 // but they're the same for all the solaris architectures that we support. | |
2241 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", | |
2242 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", | |
2243 "ILL_COPROC", "ILL_BADSTK" }; | |
2244 | |
2245 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", | |
2246 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", | |
2247 "FPE_FLTINV", "FPE_FLTSUB" }; | |
2248 | |
2249 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; | |
2250 | |
2251 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; | |
2252 | |
2253 void os::print_siginfo(outputStream* st, void* siginfo) { | |
2254 st->print("siginfo:"); | |
2255 | |
2256 const int buflen = 100; | |
2257 char buf[buflen]; | |
2258 siginfo_t *si = (siginfo_t*)siginfo; | |
2259 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); | |
2260 char *err = strerror(si->si_errno); | |
2261 if (si->si_errno != 0 && err != NULL) { | |
2262 st->print("si_errno=%s", err); | |
2263 } else { | |
2264 st->print("si_errno=%d", si->si_errno); | |
2265 } | |
2266 const int c = si->si_code; | |
2267 assert(c > 0, "unexpected si_code"); | |
2268 switch (si->si_signo) { | |
2269 case SIGILL: | |
2270 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); | |
2271 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
2272 break; | |
2273 case SIGFPE: | |
2274 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); | |
2275 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
2276 break; | |
2277 case SIGSEGV: | |
2278 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); | |
2279 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
2280 break; | |
2281 case SIGBUS: | |
2282 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); | |
2283 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
2284 break; | |
2285 default: | |
2286 st->print(", si_code=%d", si->si_code); | |
2287 // no si_addr | |
2288 } | |
2289 | |
2290 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && | |
2291 UseSharedSpaces) { | |
2292 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
2293 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
2294 st->print("\n\nError accessing class data sharing archive." \ | |
2295 " Mapped file inaccessible during execution, " \ | |
2296 " possible disk/network problem."); | |
2297 } | |
2298 } | |
2299 st->cr(); | |
2300 } | |
2301 | |
2302 // Moved from whole group, because we need them here for diagnostic | |
2303 // prints. | |
2304 #define OLDMAXSIGNUM 32 | |
2305 static int Maxsignum = 0; | |
2306 static int *ourSigFlags = NULL; | |
2307 | |
2308 extern "C" void sigINTRHandler(int, siginfo_t*, void*); | |
2309 | |
2310 int os::Solaris::get_our_sigflags(int sig) { | |
2311 assert(ourSigFlags!=NULL, "signal data structure not initialized"); | |
2312 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); | |
2313 return ourSigFlags[sig]; | |
2314 } | |
2315 | |
2316 void os::Solaris::set_our_sigflags(int sig, int flags) { | |
2317 assert(ourSigFlags!=NULL, "signal data structure not initialized"); | |
2318 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); | |
2319 ourSigFlags[sig] = flags; | |
2320 } | |
2321 | |
2322 | |
2323 static const char* get_signal_handler_name(address handler, | |
2324 char* buf, int buflen) { | |
2325 int offset; | |
2326 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); | |
2327 if (found) { | |
2328 // skip directory names | |
2329 const char *p1, *p2; | |
2330 p1 = buf; | |
2331 size_t len = strlen(os::file_separator()); | |
2332 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
2333 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
2334 } else { | |
2335 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
2336 } | |
2337 return buf; | |
2338 } | |
2339 | |
2340 static void print_signal_handler(outputStream* st, int sig, | |
2341 char* buf, size_t buflen) { | |
2342 struct sigaction sa; | |
2343 | |
2344 sigaction(sig, NULL, &sa); | |
2345 | |
2346 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
2347 | |
2348 address handler = (sa.sa_flags & SA_SIGINFO) | |
2349 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
2350 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
2351 | |
2352 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
2353 st->print("SIG_DFL"); | |
2354 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
2355 st->print("SIG_IGN"); | |
2356 } else { | |
2357 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
2358 } | |
2359 | |
2360 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); | |
2361 | |
2362 address rh = VMError::get_resetted_sighandler(sig); | |
2363 // May be, handler was resetted by VMError? | |
2364 if(rh != NULL) { | |
2365 handler = rh; | |
2366 sa.sa_flags = VMError::get_resetted_sigflags(sig); | |
2367 } | |
2368 | |
2369 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); | |
2370 | |
2371 // Check: is it our handler? | |
2372 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || | |
2373 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { | |
2374 // It is our signal handler | |
2375 // check for flags | |
2376 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { | |
2377 st->print( | |
2378 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
2379 os::Solaris::get_our_sigflags(sig)); | |
2380 } | |
2381 } | |
2382 st->cr(); | |
2383 } | |
2384 | |
2385 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
2386 st->print_cr("Signal Handlers:"); | |
2387 print_signal_handler(st, SIGSEGV, buf, buflen); | |
2388 print_signal_handler(st, SIGBUS , buf, buflen); | |
2389 print_signal_handler(st, SIGFPE , buf, buflen); | |
2390 print_signal_handler(st, SIGPIPE, buf, buflen); | |
2391 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
2392 print_signal_handler(st, SIGILL , buf, buflen); | |
2393 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
2394 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); | |
2395 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
2396 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); | |
2397 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
2398 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); | |
2399 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); | |
2400 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); | |
2401 } | |
2402 | |
2403 static char saved_jvm_path[MAXPATHLEN] = { 0 }; | |
2404 | |
2405 // Find the full path to the current module, libjvm.so or libjvm_g.so | |
2406 void os::jvm_path(char *buf, jint buflen) { | |
2407 // Error checking. | |
2408 if (buflen < MAXPATHLEN) { | |
2409 assert(false, "must use a large-enough buffer"); | |
2410 buf[0] = '\0'; | |
2411 return; | |
2412 } | |
2413 // Lazy resolve the path to current module. | |
2414 if (saved_jvm_path[0] != 0) { | |
2415 strcpy(buf, saved_jvm_path); | |
2416 return; | |
2417 } | |
2418 | |
2419 Dl_info dlinfo; | |
2420 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); | |
2421 assert(ret != 0, "cannot locate libjvm"); | |
2422 realpath((char *)dlinfo.dli_fname, buf); | |
2423 | |
2424 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { | |
2425 // Support for the gamma launcher. Typical value for buf is | |
2426 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
2427 // the right place in the string, then assume we are installed in a JDK and | |
2428 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
2429 // up the path so it looks like libjvm.so is installed there (append a | |
2430 // fake suffix hotspot/libjvm.so). | |
2431 const char *p = buf + strlen(buf) - 1; | |
2432 for (int count = 0; p > buf && count < 5; ++count) { | |
2433 for (--p; p > buf && *p != '/'; --p) | |
2434 /* empty */ ; | |
2435 } | |
2436 | |
2437 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
2438 // Look for JAVA_HOME in the environment. | |
2439 char* java_home_var = ::getenv("JAVA_HOME"); | |
2440 if (java_home_var != NULL && java_home_var[0] != 0) { | |
2441 char cpu_arch[12]; | |
2442 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); | |
2443 #ifdef _LP64 | |
2444 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. | |
2445 if (strcmp(cpu_arch, "sparc") == 0) { | |
2446 strcat(cpu_arch, "v9"); | |
2447 } else if (strcmp(cpu_arch, "i386") == 0) { | |
2448 strcpy(cpu_arch, "amd64"); | |
2449 } | |
2450 #endif | |
2451 // Check the current module name "libjvm.so" or "libjvm_g.so". | |
2452 p = strrchr(buf, '/'); | |
2453 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
2454 p = strstr(p, "_g") ? "_g" : ""; | |
2455 | |
2456 realpath(java_home_var, buf); | |
2457 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); | |
2458 if (0 == access(buf, F_OK)) { | |
2459 // Use current module name "libjvm[_g].so" instead of | |
2460 // "libjvm"debug_only("_g")".so" since for fastdebug version | |
2461 // we should have "libjvm.so" but debug_only("_g") adds "_g"! | |
2462 // It is used when we are choosing the HPI library's name | |
2463 // "libhpi[_g].so" in hpi::initialize_get_interface(). | |
2464 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); | |
2465 } else { | |
2466 // Go back to path of .so | |
2467 realpath((char *)dlinfo.dli_fname, buf); | |
2468 } | |
2469 } | |
2470 } | |
2471 } | |
2472 | |
2473 strcpy(saved_jvm_path, buf); | |
2474 } | |
2475 | |
2476 | |
2477 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
2478 // no prefix required, not even "_" | |
2479 } | |
2480 | |
2481 | |
2482 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
2483 // no suffix required | |
2484 } | |
2485 | |
2486 | |
2487 // sun.misc.Signal | |
2488 | |
2489 extern "C" { | |
2490 static void UserHandler(int sig, void *siginfo, void *context) { | |
2491 // Ctrl-C is pressed during error reporting, likely because the error | |
2492 // handler fails to abort. Let VM die immediately. | |
2493 if (sig == SIGINT && is_error_reported()) { | |
2494 os::die(); | |
2495 } | |
2496 | |
2497 os::signal_notify(sig); | |
2498 // We do not need to reinstate the signal handler each time... | |
2499 } | |
2500 } | |
2501 | |
2502 void* os::user_handler() { | |
2503 return CAST_FROM_FN_PTR(void*, UserHandler); | |
2504 } | |
2505 | |
2506 extern "C" { | |
2507 typedef void (*sa_handler_t)(int); | |
2508 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
2509 } | |
2510 | |
2511 void* os::signal(int signal_number, void* handler) { | |
2512 struct sigaction sigAct, oldSigAct; | |
2513 sigfillset(&(sigAct.sa_mask)); | |
2514 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; | |
2515 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
2516 | |
2517 if (sigaction(signal_number, &sigAct, &oldSigAct)) | |
2518 // -1 means registration failed | |
2519 return (void *)-1; | |
2520 | |
2521 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
2522 } | |
2523 | |
2524 void os::signal_raise(int signal_number) { | |
2525 raise(signal_number); | |
2526 } | |
2527 | |
2528 /* | |
2529 * The following code is moved from os.cpp for making this | |
2530 * code platform specific, which it is by its very nature. | |
2531 */ | |
2532 | |
2533 // a counter for each possible signal value | |
2534 static int Sigexit = 0; | |
2535 static int Maxlibjsigsigs; | |
2536 static jint *pending_signals = NULL; | |
2537 static int *preinstalled_sigs = NULL; | |
2538 static struct sigaction *chainedsigactions = NULL; | |
2539 static sema_t sig_sem; | |
2540 typedef int (*version_getting_t)(); | |
2541 version_getting_t os::Solaris::get_libjsig_version = NULL; | |
2542 static int libjsigversion = NULL; | |
2543 | |
2544 int os::sigexitnum_pd() { | |
2545 assert(Sigexit > 0, "signal memory not yet initialized"); | |
2546 return Sigexit; | |
2547 } | |
2548 | |
2549 void os::Solaris::init_signal_mem() { | |
2550 // Initialize signal structures | |
2551 Maxsignum = SIGRTMAX; | |
2552 Sigexit = Maxsignum+1; | |
2553 assert(Maxsignum >0, "Unable to obtain max signal number"); | |
2554 | |
2555 Maxlibjsigsigs = Maxsignum; | |
2556 | |
2557 // pending_signals has one int per signal | |
2558 // The additional signal is for SIGEXIT - exit signal to signal_thread | |
2559 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); | |
2560 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); | |
2561 | |
2562 if (UseSignalChaining) { | |
2563 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) | |
2564 * (Maxsignum + 1)); | |
2565 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); | |
2566 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); | |
2567 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); | |
2568 } | |
2569 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); | |
2570 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); | |
2571 } | |
2572 | |
2573 void os::signal_init_pd() { | |
2574 int ret; | |
2575 | |
2576 ret = ::sema_init(&sig_sem, 0, NULL, NULL); | |
2577 assert(ret == 0, "sema_init() failed"); | |
2578 } | |
2579 | |
2580 void os::signal_notify(int signal_number) { | |
2581 int ret; | |
2582 | |
2583 Atomic::inc(&pending_signals[signal_number]); | |
2584 ret = ::sema_post(&sig_sem); | |
2585 assert(ret == 0, "sema_post() failed"); | |
2586 } | |
2587 | |
2588 static int check_pending_signals(bool wait_for_signal) { | |
2589 int ret; | |
2590 while (true) { | |
2591 for (int i = 0; i < Sigexit + 1; i++) { | |
2592 jint n = pending_signals[i]; | |
2593 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
2594 return i; | |
2595 } | |
2596 } | |
2597 if (!wait_for_signal) { | |
2598 return -1; | |
2599 } | |
2600 JavaThread *thread = JavaThread::current(); | |
2601 ThreadBlockInVM tbivm(thread); | |
2602 | |
2603 bool threadIsSuspended; | |
2604 do { | |
2605 thread->set_suspend_equivalent(); | |
2606 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
2607 while((ret = ::sema_wait(&sig_sem)) == EINTR) | |
2608 ; | |
2609 assert(ret == 0, "sema_wait() failed"); | |
2610 | |
2611 // were we externally suspended while we were waiting? | |
2612 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
2613 if (threadIsSuspended) { | |
2614 // | |
2615 // The semaphore has been incremented, but while we were waiting | |
2616 // another thread suspended us. We don't want to continue running | |
2617 // while suspended because that would surprise the thread that | |
2618 // suspended us. | |
2619 // | |
2620 ret = ::sema_post(&sig_sem); | |
2621 assert(ret == 0, "sema_post() failed"); | |
2622 | |
2623 thread->java_suspend_self(); | |
2624 } | |
2625 } while (threadIsSuspended); | |
2626 } | |
2627 } | |
2628 | |
2629 int os::signal_lookup() { | |
2630 return check_pending_signals(false); | |
2631 } | |
2632 | |
2633 int os::signal_wait() { | |
2634 return check_pending_signals(true); | |
2635 } | |
2636 | |
2637 //////////////////////////////////////////////////////////////////////////////// | |
2638 // Virtual Memory | |
2639 | |
2640 static int page_size = -1; | |
2641 | |
2642 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will | |
2643 // clear this var if support is not available. | |
2644 static bool has_map_align = true; | |
2645 | |
2646 int os::vm_page_size() { | |
2647 assert(page_size != -1, "must call os::init"); | |
2648 return page_size; | |
2649 } | |
2650 | |
2651 // Solaris allocates memory by pages. | |
2652 int os::vm_allocation_granularity() { | |
2653 assert(page_size != -1, "must call os::init"); | |
2654 return page_size; | |
2655 } | |
2656 | |
656 | 2657 bool os::commit_memory(char* addr, size_t bytes, bool exec) { |
2658 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; | |
0 | 2659 size_t size = bytes; |
2660 return | |
656 | 2661 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); |
2662 } | |
2663 | |
2664 bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint, | |
2665 bool exec) { | |
2666 if (commit_memory(addr, bytes, exec)) { | |
0 | 2667 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { |
2668 // If the large page size has been set and the VM | |
2669 // is using large pages, use the large page size | |
2670 // if it is smaller than the alignment hint. This is | |
2671 // a case where the VM wants to use a larger alignment size | |
2672 // for its own reasons but still want to use large pages | |
2673 // (which is what matters to setting the mpss range. | |
2674 size_t page_size = 0; | |
2675 if (large_page_size() < alignment_hint) { | |
2676 assert(UseLargePages, "Expected to be here for large page use only"); | |
2677 page_size = large_page_size(); | |
2678 } else { | |
2679 // If the alignment hint is less than the large page | |
2680 // size, the VM wants a particular alignment (thus the hint) | |
2681 // for internal reasons. Try to set the mpss range using | |
2682 // the alignment_hint. | |
2683 page_size = alignment_hint; | |
2684 } | |
2685 // Since this is a hint, ignore any failures. | |
2686 (void)Solaris::set_mpss_range(addr, bytes, page_size); | |
2687 } | |
2688 return true; | |
2689 } | |
2690 return false; | |
2691 } | |
2692 | |
2693 // Uncommit the pages in a specified region. | |
2694 void os::free_memory(char* addr, size_t bytes) { | |
2695 if (madvise(addr, bytes, MADV_FREE) < 0) { | |
2696 debug_only(warning("MADV_FREE failed.")); | |
2697 return; | |
2698 } | |
2699 } | |
2700 | |
2701 // Change the page size in a given range. | |
2702 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
2703 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); | |
2704 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); | |
2705 Solaris::set_mpss_range(addr, bytes, alignment_hint); | |
2706 } | |
2707 | |
2708 // Tell the OS to make the range local to the first-touching LWP | |
141 | 2709 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
0 | 2710 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); |
2711 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { | |
2712 debug_only(warning("MADV_ACCESS_LWP failed.")); | |
2713 } | |
2714 } | |
2715 | |
2716 // Tell the OS that this range would be accessed from different LWPs. | |
2717 void os::numa_make_global(char *addr, size_t bytes) { | |
2718 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); | |
2719 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { | |
2720 debug_only(warning("MADV_ACCESS_MANY failed.")); | |
2721 } | |
2722 } | |
2723 | |
2724 // Get the number of the locality groups. | |
2725 size_t os::numa_get_groups_num() { | |
2726 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); | |
2727 return n != -1 ? n : 1; | |
2728 } | |
2729 | |
2730 // Get a list of leaf locality groups. A leaf lgroup is group that | |
2731 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory | |
2732 // board. An LWP is assigned to one of these groups upon creation. | |
2733 size_t os::numa_get_leaf_groups(int *ids, size_t size) { | |
2734 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { | |
2735 ids[0] = 0; | |
2736 return 1; | |
2737 } | |
2738 int result_size = 0, top = 1, bottom = 0, cur = 0; | |
2739 for (int k = 0; k < size; k++) { | |
2740 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], | |
2741 (Solaris::lgrp_id_t*)&ids[top], size - top); | |
2742 if (r == -1) { | |
2743 ids[0] = 0; | |
2744 return 1; | |
2745 } | |
2746 if (!r) { | |
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2747 // That's a leaf node. |
0 | 2748 assert (bottom <= cur, "Sanity check"); |
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2749 // Check if the node has memory |
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2750 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], |
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2751 NULL, 0, LGRP_RSRC_MEM) > 0) { |
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2752 ids[bottom++] = ids[cur]; |
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2753 } |
0 | 2754 } |
2755 top += r; | |
2756 cur++; | |
2757 } | |
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2758 if (bottom == 0) { |
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2759 // Handle a situation, when the OS reports no memory available. |
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2760 // Assume UMA architecture. |
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2761 ids[0] = 0; |
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2762 return 1; |
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2763 } |
0 | 2764 return bottom; |
2765 } | |
2766 | |
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2767 // Detect the topology change. Typically happens during CPU plugging-unplugging. |
0 | 2768 bool os::numa_topology_changed() { |
2769 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); | |
2770 if (is_stale != -1 && is_stale) { | |
2771 Solaris::lgrp_fini(Solaris::lgrp_cookie()); | |
2772 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); | |
2773 assert(c != 0, "Failure to initialize LGRP API"); | |
2774 Solaris::set_lgrp_cookie(c); | |
2775 return true; | |
2776 } | |
2777 return false; | |
2778 } | |
2779 | |
2780 // Get the group id of the current LWP. | |
2781 int os::numa_get_group_id() { | |
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2782 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); |
0 | 2783 if (lgrp_id == -1) { |
2784 return 0; | |
2785 } | |
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2786 const int size = os::numa_get_groups_num(); |
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2787 int *ids = (int*)alloca(size * sizeof(int)); |
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2788 |
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2789 // Get the ids of all lgroups with memory; r is the count. |
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2790 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, |
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2791 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); |
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2792 if (r <= 0) { |
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2793 return 0; |
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2794 } |
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2795 return ids[os::random() % r]; |
0 | 2796 } |
2797 | |
2798 // Request information about the page. | |
2799 bool os::get_page_info(char *start, page_info* info) { | |
2800 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; | |
2801 uint64_t addr = (uintptr_t)start; | |
2802 uint64_t outdata[2]; | |
2803 uint_t validity = 0; | |
2804 | |
2805 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { | |
2806 return false; | |
2807 } | |
2808 | |
2809 info->size = 0; | |
2810 info->lgrp_id = -1; | |
2811 | |
2812 if ((validity & 1) != 0) { | |
2813 if ((validity & 2) != 0) { | |
2814 info->lgrp_id = outdata[0]; | |
2815 } | |
2816 if ((validity & 4) != 0) { | |
2817 info->size = outdata[1]; | |
2818 } | |
2819 return true; | |
2820 } | |
2821 return false; | |
2822 } | |
2823 | |
2824 // Scan the pages from start to end until a page different than | |
2825 // the one described in the info parameter is encountered. | |
2826 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
2827 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; | |
2828 const size_t types = sizeof(info_types) / sizeof(info_types[0]); | |
2829 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; | |
2830 uint_t validity[MAX_MEMINFO_CNT]; | |
2831 | |
2832 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); | |
2833 uint64_t p = (uint64_t)start; | |
2834 while (p < (uint64_t)end) { | |
2835 addrs[0] = p; | |
2836 size_t addrs_count = 1; | |
2837 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { | |
2838 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; | |
2839 addrs_count++; | |
2840 } | |
2841 | |
2842 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { | |
2843 return NULL; | |
2844 } | |
2845 | |
2846 size_t i = 0; | |
2847 for (; i < addrs_count; i++) { | |
2848 if ((validity[i] & 1) != 0) { | |
2849 if ((validity[i] & 4) != 0) { | |
2850 if (outdata[types * i + 1] != page_expected->size) { | |
2851 break; | |
2852 } | |
2853 } else | |
2854 if (page_expected->size != 0) { | |
2855 break; | |
2856 } | |
2857 | |
2858 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { | |
2859 if (outdata[types * i] != page_expected->lgrp_id) { | |
2860 break; | |
2861 } | |
2862 } | |
2863 } else { | |
2864 return NULL; | |
2865 } | |
2866 } | |
2867 | |
2868 if (i != addrs_count) { | |
2869 if ((validity[i] & 2) != 0) { | |
2870 page_found->lgrp_id = outdata[types * i]; | |
2871 } else { | |
2872 page_found->lgrp_id = -1; | |
2873 } | |
2874 if ((validity[i] & 4) != 0) { | |
2875 page_found->size = outdata[types * i + 1]; | |
2876 } else { | |
2877 page_found->size = 0; | |
2878 } | |
2879 return (char*)addrs[i]; | |
2880 } | |
2881 | |
2882 p = addrs[addrs_count - 1] + page_size; | |
2883 } | |
2884 return end; | |
2885 } | |
2886 | |
2887 bool os::uncommit_memory(char* addr, size_t bytes) { | |
2888 size_t size = bytes; | |
2889 // Map uncommitted pages PROT_NONE so we fail early if we touch an | |
2890 // uncommitted page. Otherwise, the read/write might succeed if we | |
2891 // have enough swap space to back the physical page. | |
2892 return | |
2893 NULL != Solaris::mmap_chunk(addr, size, | |
2894 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, | |
2895 PROT_NONE); | |
2896 } | |
2897 | |
2898 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { | |
2899 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); | |
2900 | |
2901 if (b == MAP_FAILED) { | |
2902 return NULL; | |
2903 } | |
2904 return b; | |
2905 } | |
2906 | |
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2907 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { |
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2908 char* addr = requested_addr; |
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2909 int flags = MAP_PRIVATE | MAP_NORESERVE; |
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2910 |
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2911 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); |
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2912 |
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2913 if (fixed) { |
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2914 flags |= MAP_FIXED; |
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2915 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { |
0 | 2916 flags |= MAP_ALIGN; |
2917 addr = (char*) alignment_hint; | |
2918 } | |
2919 | |
2920 // Map uncommitted pages PROT_NONE so we fail early if we touch an | |
2921 // uncommitted page. Otherwise, the read/write might succeed if we | |
2922 // have enough swap space to back the physical page. | |
60
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2923 return mmap_chunk(addr, bytes, flags, PROT_NONE); |
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2924 } |
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2925 |
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2926 char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { |
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2927 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); |
0 | 2928 |
2929 guarantee(requested_addr == NULL || requested_addr == addr, | |
2930 "OS failed to return requested mmap address."); | |
2931 return addr; | |
2932 } | |
2933 | |
2934 // Reserve memory at an arbitrary address, only if that area is | |
2935 // available (and not reserved for something else). | |
2936 | |
2937 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { | |
2938 const int max_tries = 10; | |
2939 char* base[max_tries]; | |
2940 size_t size[max_tries]; | |
2941 | |
2942 // Solaris adds a gap between mmap'ed regions. The size of the gap | |
2943 // is dependent on the requested size and the MMU. Our initial gap | |
2944 // value here is just a guess and will be corrected later. | |
2945 bool had_top_overlap = false; | |
2946 bool have_adjusted_gap = false; | |
2947 size_t gap = 0x400000; | |
2948 | |
2949 // Assert only that the size is a multiple of the page size, since | |
2950 // that's all that mmap requires, and since that's all we really know | |
2951 // about at this low abstraction level. If we need higher alignment, | |
2952 // we can either pass an alignment to this method or verify alignment | |
2953 // in one of the methods further up the call chain. See bug 5044738. | |
2954 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
2955 | |
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2956 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. |
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2957 // Give it a try, if the kernel honors the hint we can return immediately. |
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2958 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); |
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2959 volatile int err = errno; |
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2960 if (addr == requested_addr) { |
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2961 return addr; |
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2962 } else if (addr != NULL) { |
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2963 unmap_memory(addr, bytes); |
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2964 } |
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2965 |
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2966 if (PrintMiscellaneous && Verbose) { |
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2967 char buf[256]; |
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2968 buf[0] = '\0'; |
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2969 if (addr == NULL) { |
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2970 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); |
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2971 } |
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2972 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " |
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2973 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT |
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2974 "%s", bytes, requested_addr, addr, buf); |
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2975 } |
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2976 |
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2977 // Address hint method didn't work. Fall back to the old method. |
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2978 // In theory, once SNV becomes our oldest supported platform, this |
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2979 // code will no longer be needed. |
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2980 // |
0 | 2981 // Repeatedly allocate blocks until the block is allocated at the |
2982 // right spot. Give up after max_tries. | |
2983 int i; | |
2984 for (i = 0; i < max_tries; ++i) { | |
2985 base[i] = reserve_memory(bytes); | |
2986 | |
2987 if (base[i] != NULL) { | |
2988 // Is this the block we wanted? | |
2989 if (base[i] == requested_addr) { | |
2990 size[i] = bytes; | |
2991 break; | |
2992 } | |
2993 | |
2994 // check that the gap value is right | |
2995 if (had_top_overlap && !have_adjusted_gap) { | |
2996 size_t actual_gap = base[i-1] - base[i] - bytes; | |
2997 if (gap != actual_gap) { | |
2998 // adjust the gap value and retry the last 2 allocations | |
2999 assert(i > 0, "gap adjustment code problem"); | |
3000 have_adjusted_gap = true; // adjust the gap only once, just in case | |
3001 gap = actual_gap; | |
3002 if (PrintMiscellaneous && Verbose) { | |
3003 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); | |
3004 } | |
3005 unmap_memory(base[i], bytes); | |
3006 unmap_memory(base[i-1], size[i-1]); | |
3007 i-=2; | |
3008 continue; | |
3009 } | |
3010 } | |
3011 | |
3012 // Does this overlap the block we wanted? Give back the overlapped | |
3013 // parts and try again. | |
3014 // | |
3015 // There is still a bug in this code: if top_overlap == bytes, | |
3016 // the overlap is offset from requested region by the value of gap. | |
3017 // In this case giving back the overlapped part will not work, | |
3018 // because we'll give back the entire block at base[i] and | |
3019 // therefore the subsequent allocation will not generate a new gap. | |
3020 // This could be fixed with a new algorithm that used larger | |
3021 // or variable size chunks to find the requested region - | |
3022 // but such a change would introduce additional complications. | |
3023 // It's rare enough that the planets align for this bug, | |
3024 // so we'll just wait for a fix for 6204603/5003415 which | |
3025 // will provide a mmap flag to allow us to avoid this business. | |
3026 | |
3027 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
3028 if (top_overlap >= 0 && top_overlap < bytes) { | |
3029 had_top_overlap = true; | |
3030 unmap_memory(base[i], top_overlap); | |
3031 base[i] += top_overlap; | |
3032 size[i] = bytes - top_overlap; | |
3033 } else { | |
3034 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
3035 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
3036 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { | |
3037 warning("attempt_reserve_memory_at: possible alignment bug"); | |
3038 } | |
3039 unmap_memory(requested_addr, bottom_overlap); | |
3040 size[i] = bytes - bottom_overlap; | |
3041 } else { | |
3042 size[i] = bytes; | |
3043 } | |
3044 } | |
3045 } | |
3046 } | |
3047 | |
3048 // Give back the unused reserved pieces. | |
3049 | |
3050 for (int j = 0; j < i; ++j) { | |
3051 if (base[j] != NULL) { | |
3052 unmap_memory(base[j], size[j]); | |
3053 } | |
3054 } | |
3055 | |
3056 return (i < max_tries) ? requested_addr : NULL; | |
3057 } | |
3058 | |
3059 bool os::release_memory(char* addr, size_t bytes) { | |
3060 size_t size = bytes; | |
3061 return munmap(addr, size) == 0; | |
3062 } | |
3063 | |
3064 static bool solaris_mprotect(char* addr, size_t bytes, int prot) { | |
3065 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), | |
3066 "addr must be page aligned"); | |
3067 int retVal = mprotect(addr, bytes, prot); | |
3068 return retVal == 0; | |
3069 } | |
3070 | |
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3071 // Protect memory (Used to pass readonly pages through |
0 | 3072 // JNI GetArray<type>Elements with empty arrays.) |
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3073 // Also, used for serialization page and for compressed oops null pointer |
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3074 // checking. |
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3075 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
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3076 bool is_committed) { |
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3077 unsigned int p = 0; |
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3078 switch (prot) { |
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3079 case MEM_PROT_NONE: p = PROT_NONE; break; |
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3080 case MEM_PROT_READ: p = PROT_READ; break; |
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3081 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
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3082 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
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3083 default: |
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3084 ShouldNotReachHere(); |
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3085 } |
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3086 // is_committed is unused. |
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3087 return solaris_mprotect(addr, bytes, p); |
0 | 3088 } |
3089 | |
3090 // guard_memory and unguard_memory only happens within stack guard pages. | |
3091 // Since ISM pertains only to the heap, guard and unguard memory should not | |
3092 /// happen with an ISM region. | |
3093 bool os::guard_memory(char* addr, size_t bytes) { | |
3094 return solaris_mprotect(addr, bytes, PROT_NONE); | |
3095 } | |
3096 | |
3097 bool os::unguard_memory(char* addr, size_t bytes) { | |
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3098 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); |
0 | 3099 } |
3100 | |
3101 // Large page support | |
3102 | |
3103 // UseLargePages is the master flag to enable/disable large page memory. | |
3104 // UseMPSS and UseISM are supported for compatibility reasons. Their combined | |
3105 // effects can be described in the following table: | |
3106 // | |
3107 // UseLargePages UseMPSS UseISM | |
3108 // false * * => UseLargePages is the master switch, turning | |
3109 // it off will turn off both UseMPSS and | |
3110 // UseISM. VM will not use large page memory | |
3111 // regardless the settings of UseMPSS/UseISM. | |
3112 // true false false => Unless future Solaris provides other | |
3113 // mechanism to use large page memory, this | |
3114 // combination is equivalent to -UseLargePages, | |
3115 // VM will not use large page memory | |
3116 // true true false => JVM will use MPSS for large page memory. | |
3117 // This is the default behavior. | |
3118 // true false true => JVM will use ISM for large page memory. | |
3119 // true true true => JVM will use ISM if it is available. | |
3120 // Otherwise, JVM will fall back to MPSS. | |
3121 // Becaues ISM is now available on all | |
3122 // supported Solaris versions, this combination | |
3123 // is equivalent to +UseISM -UseMPSS. | |
3124 | |
3125 typedef int (*getpagesizes_func_type) (size_t[], int); | |
3126 static size_t _large_page_size = 0; | |
3127 | |
3128 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { | |
3129 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address | |
3130 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc | |
3131 // can support multiple page sizes. | |
3132 | |
3133 // Don't bother to probe page size because getpagesizes() comes with MPSS. | |
3134 // ISM is only recommended on old Solaris where there is no MPSS support. | |
3135 // Simply choose a conservative value as default. | |
3136 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : | |
3137 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); | |
3138 | |
3139 // ISM is available on all supported Solaris versions | |
3140 return true; | |
3141 } | |
3142 | |
3143 // Insertion sort for small arrays (descending order). | |
3144 static void insertion_sort_descending(size_t* array, int len) { | |
3145 for (int i = 0; i < len; i++) { | |
3146 size_t val = array[i]; | |
3147 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { | |
3148 size_t tmp = array[key]; | |
3149 array[key] = array[key - 1]; | |
3150 array[key - 1] = tmp; | |
3151 } | |
3152 } | |
3153 } | |
3154 | |
3155 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { | |
3156 getpagesizes_func_type getpagesizes_func = | |
3157 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); | |
3158 if (getpagesizes_func == NULL) { | |
3159 if (warn) { | |
3160 warning("MPSS is not supported by the operating system."); | |
3161 } | |
3162 return false; | |
3163 } | |
3164 | |
3165 const unsigned int usable_count = VM_Version::page_size_count(); | |
3166 if (usable_count == 1) { | |
3167 return false; | |
3168 } | |
3169 | |
3170 // Fill the array of page sizes. | |
3171 int n = getpagesizes_func(_page_sizes, page_sizes_max); | |
3172 assert(n > 0, "Solaris bug?"); | |
3173 if (n == page_sizes_max) { | |
3174 // Add a sentinel value (necessary only if the array was completely filled | |
3175 // since it is static (zeroed at initialization)). | |
3176 _page_sizes[--n] = 0; | |
3177 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) | |
3178 } | |
3179 assert(_page_sizes[n] == 0, "missing sentinel"); | |
3180 | |
3181 if (n == 1) return false; // Only one page size available. | |
3182 | |
3183 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and | |
3184 // select up to usable_count elements. First sort the array, find the first | |
3185 // acceptable value, then copy the usable sizes to the top of the array and | |
3186 // trim the rest. Make sure to include the default page size :-). | |
3187 // | |
3188 // A better policy could get rid of the 4M limit by taking the sizes of the | |
3189 // important VM memory regions (java heap and possibly the code cache) into | |
3190 // account. | |
3191 insertion_sort_descending(_page_sizes, n); | |
3192 const size_t size_limit = | |
3193 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; | |
3194 int beg; | |
3195 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; | |
3196 const int end = MIN2((int)usable_count, n) - 1; | |
3197 for (int cur = 0; cur < end; ++cur, ++beg) { | |
3198 _page_sizes[cur] = _page_sizes[beg]; | |
3199 } | |
3200 _page_sizes[end] = vm_page_size(); | |
3201 _page_sizes[end + 1] = 0; | |
3202 | |
3203 if (_page_sizes[end] > _page_sizes[end - 1]) { | |
3204 // Default page size is not the smallest; sort again. | |
3205 insertion_sort_descending(_page_sizes, end + 1); | |
3206 } | |
3207 *page_size = _page_sizes[0]; | |
3208 | |
3209 return true; | |
3210 } | |
3211 | |
3212 bool os::large_page_init() { | |
3213 if (!UseLargePages) { | |
3214 UseISM = false; | |
3215 UseMPSS = false; | |
3216 return false; | |
3217 } | |
3218 | |
3219 // print a warning if any large page related flag is specified on command line | |
3220 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || | |
3221 !FLAG_IS_DEFAULT(UseISM) || | |
3222 !FLAG_IS_DEFAULT(UseMPSS) || | |
3223 !FLAG_IS_DEFAULT(LargePageSizeInBytes); | |
3224 UseISM = UseISM && | |
3225 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); | |
3226 if (UseISM) { | |
3227 // ISM disables MPSS to be compatible with old JDK behavior | |
3228 UseMPSS = false; | |
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3229 _page_sizes[0] = _large_page_size; |
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|
3230 _page_sizes[1] = vm_page_size(); |
0 | 3231 } |
3232 | |
3233 UseMPSS = UseMPSS && | |
3234 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); | |
3235 | |
3236 UseLargePages = UseISM || UseMPSS; | |
3237 return UseLargePages; | |
3238 } | |
3239 | |
3240 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { | |
3241 // Signal to OS that we want large pages for addresses | |
3242 // from addr, addr + bytes | |
3243 struct memcntl_mha mpss_struct; | |
3244 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; | |
3245 mpss_struct.mha_pagesize = align; | |
3246 mpss_struct.mha_flags = 0; | |
3247 if (memcntl(start, bytes, MC_HAT_ADVISE, | |
3248 (caddr_t) &mpss_struct, 0, 0) < 0) { | |
3249 debug_only(warning("Attempt to use MPSS failed.")); | |
3250 return false; | |
3251 } | |
3252 return true; | |
3253 } | |
3254 | |
656 | 3255 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { |
3256 // "exec" is passed in but not used. Creating the shared image for | |
3257 // the code cache doesn't have an SHM_X executable permission to check. | |
0 | 3258 assert(UseLargePages && UseISM, "only for ISM large pages"); |
3259 | |
3260 size_t size = bytes; | |
3261 char* retAddr = NULL; | |
3262 int shmid; | |
3263 key_t ismKey; | |
3264 | |
3265 bool warn_on_failure = UseISM && | |
3266 (!FLAG_IS_DEFAULT(UseLargePages) || | |
3267 !FLAG_IS_DEFAULT(UseISM) || | |
3268 !FLAG_IS_DEFAULT(LargePageSizeInBytes) | |
3269 ); | |
3270 char msg[128]; | |
3271 | |
3272 ismKey = IPC_PRIVATE; | |
3273 | |
3274 // Create a large shared memory region to attach to based on size. | |
3275 // Currently, size is the total size of the heap | |
3276 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); | |
3277 if (shmid == -1){ | |
3278 if (warn_on_failure) { | |
3279 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); | |
3280 warning(msg); | |
3281 } | |
3282 return NULL; | |
3283 } | |
3284 | |
3285 // Attach to the region | |
3286 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); | |
3287 int err = errno; | |
3288 | |
3289 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
3290 // will be deleted when it's detached by shmdt() or when the process | |
3291 // terminates. If shmat() is not successful this will remove the shared | |
3292 // segment immediately. | |
3293 shmctl(shmid, IPC_RMID, NULL); | |
3294 | |
3295 if (retAddr == (char *) -1) { | |
3296 if (warn_on_failure) { | |
3297 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); | |
3298 warning(msg); | |
3299 } | |
3300 return NULL; | |
3301 } | |
3302 | |
3303 return retAddr; | |
3304 } | |
3305 | |
3306 bool os::release_memory_special(char* base, size_t bytes) { | |
3307 // detaching the SHM segment will also delete it, see reserve_memory_special() | |
3308 int rslt = shmdt(base); | |
3309 return rslt == 0; | |
3310 } | |
3311 | |
3312 size_t os::large_page_size() { | |
3313 return _large_page_size; | |
3314 } | |
3315 | |
3316 // MPSS allows application to commit large page memory on demand; with ISM | |
3317 // the entire memory region must be allocated as shared memory. | |
3318 bool os::can_commit_large_page_memory() { | |
3319 return UseISM ? false : true; | |
3320 } | |
3321 | |
79
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3322 bool os::can_execute_large_page_memory() { |
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3323 return UseISM ? false : true; |
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
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|
3324 } |
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3325 |
0 | 3326 static int os_sleep(jlong millis, bool interruptible) { |
3327 const jlong limit = INT_MAX; | |
3328 jlong prevtime; | |
3329 int res; | |
3330 | |
3331 while (millis > limit) { | |
3332 if ((res = os_sleep(limit, interruptible)) != OS_OK) | |
3333 return res; | |
3334 millis -= limit; | |
3335 } | |
3336 | |
3337 // Restart interrupted polls with new parameters until the proper delay | |
3338 // has been completed. | |
3339 | |
3340 prevtime = getTimeMillis(); | |
3341 | |
3342 while (millis > 0) { | |
3343 jlong newtime; | |
3344 | |
3345 if (!interruptible) { | |
3346 // Following assert fails for os::yield_all: | |
3347 // assert(!thread->is_Java_thread(), "must not be java thread"); | |
3348 res = poll(NULL, 0, millis); | |
3349 } else { | |
3350 JavaThread *jt = JavaThread::current(); | |
3351 | |
3352 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, | |
3353 os::Solaris::clear_interrupted); | |
3354 } | |
3355 | |
3356 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for | |
3357 // thread.Interrupt. | |
3358 | |
3359 if((res == OS_ERR) && (errno == EINTR)) { | |
3360 newtime = getTimeMillis(); | |
3361 assert(newtime >= prevtime, "time moving backwards"); | |
3362 /* Doing prevtime and newtime in microseconds doesn't help precision, | |
3363 and trying to round up to avoid lost milliseconds can result in a | |
3364 too-short delay. */ | |
3365 millis -= newtime - prevtime; | |
3366 if(millis <= 0) | |
3367 return OS_OK; | |
3368 prevtime = newtime; | |
3369 } else | |
3370 return res; | |
3371 } | |
3372 | |
3373 return OS_OK; | |
3374 } | |
3375 | |
3376 // Read calls from inside the vm need to perform state transitions | |
3377 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
3378 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); | |
3379 } | |
3380 | |
3381 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
3382 assert(thread == Thread::current(), "thread consistency check"); | |
3383 | |
3384 // TODO-FIXME: this should be removed. | |
3385 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock | |
3386 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate | |
3387 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving | |
3388 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel | |
3389 // is fooled into believing that the system is making progress. In the code below we block the | |
3390 // the watcher thread while safepoint is in progress so that it would not appear as though the | |
3391 // system is making progress. | |
3392 if (!Solaris::T2_libthread() && | |
3393 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { | |
3394 // We now try to acquire the threads lock. Since this lock is held by the VM thread during | |
3395 // the entire safepoint, the watcher thread will line up here during the safepoint. | |
3396 Threads_lock->lock_without_safepoint_check(); | |
3397 Threads_lock->unlock(); | |
3398 } | |
3399 | |
3400 if (thread->is_Java_thread()) { | |
3401 // This is a JavaThread so we honor the _thread_blocked protocol | |
3402 // even for sleeps of 0 milliseconds. This was originally done | |
3403 // as a workaround for bug 4338139. However, now we also do it | |
3404 // to honor the suspend-equivalent protocol. | |
3405 | |
3406 JavaThread *jt = (JavaThread *) thread; | |
3407 ThreadBlockInVM tbivm(jt); | |
3408 | |
3409 jt->set_suspend_equivalent(); | |
3410 // cleared by handle_special_suspend_equivalent_condition() or | |
3411 // java_suspend_self() via check_and_wait_while_suspended() | |
3412 | |
3413 int ret_code; | |
3414 if (millis <= 0) { | |
3415 thr_yield(); | |
3416 ret_code = 0; | |
3417 } else { | |
3418 // The original sleep() implementation did not create an | |
3419 // OSThreadWaitState helper for sleeps of 0 milliseconds. | |
3420 // I'm preserving that decision for now. | |
3421 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
3422 | |
3423 ret_code = os_sleep(millis, interruptible); | |
3424 } | |
3425 | |
3426 // were we externally suspended while we were waiting? | |
3427 jt->check_and_wait_while_suspended(); | |
3428 | |
3429 return ret_code; | |
3430 } | |
3431 | |
3432 // non-JavaThread from this point on: | |
3433 | |
3434 if (millis <= 0) { | |
3435 thr_yield(); | |
3436 return 0; | |
3437 } | |
3438 | |
3439 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
3440 | |
3441 return os_sleep(millis, interruptible); | |
3442 } | |
3443 | |
3444 int os::naked_sleep() { | |
3445 // %% make the sleep time an integer flag. for now use 1 millisec. | |
3446 return os_sleep(1, false); | |
3447 } | |
3448 | |
3449 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
3450 void os::infinite_sleep() { | |
3451 while (true) { // sleep forever ... | |
3452 ::sleep(100); // ... 100 seconds at a time | |
3453 } | |
3454 } | |
3455 | |
3456 // Used to convert frequent JVM_Yield() to nops | |
3457 bool os::dont_yield() { | |
3458 if (DontYieldALot) { | |
3459 static hrtime_t last_time = 0; | |
3460 hrtime_t diff = getTimeNanos() - last_time; | |
3461 | |
3462 if (diff < DontYieldALotInterval * 1000000) | |
3463 return true; | |
3464 | |
3465 last_time += diff; | |
3466 | |
3467 return false; | |
3468 } | |
3469 else { | |
3470 return false; | |
3471 } | |
3472 } | |
3473 | |
3474 // Caveat: Solaris os::yield() causes a thread-state transition whereas | |
3475 // the linux and win32 implementations do not. This should be checked. | |
3476 | |
3477 void os::yield() { | |
3478 // Yields to all threads with same or greater priority | |
3479 os::sleep(Thread::current(), 0, false); | |
3480 } | |
3481 | |
3482 // Note that yield semantics are defined by the scheduling class to which | |
3483 // the thread currently belongs. Typically, yield will _not yield to | |
3484 // other equal or higher priority threads that reside on the dispatch queues | |
3485 // of other CPUs. | |
3486 | |
3487 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } | |
3488 | |
3489 | |
3490 // On Solaris we found that yield_all doesn't always yield to all other threads. | |
3491 // There have been cases where there is a thread ready to execute but it doesn't | |
3492 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. | |
3493 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a | |
3494 // SIGWAITING signal which will cause a new lwp to be created. So we count the | |
3495 // number of times yield_all is called in the one loop and increase the sleep | |
3496 // time after 8 attempts. If this fails too we increase the concurrency level | |
3497 // so that the starving thread would get an lwp | |
3498 | |
3499 void os::yield_all(int attempts) { | |
3500 // Yields to all threads, including threads with lower priorities | |
3501 if (attempts == 0) { | |
3502 os::sleep(Thread::current(), 1, false); | |
3503 } else { | |
3504 int iterations = attempts % 30; | |
3505 if (iterations == 0 && !os::Solaris::T2_libthread()) { | |
3506 // thr_setconcurrency and _getconcurrency make sense only under T1. | |
3507 int noofLWPS = thr_getconcurrency(); | |
3508 if (noofLWPS < (Threads::number_of_threads() + 2)) { | |
3509 thr_setconcurrency(thr_getconcurrency() + 1); | |
3510 } | |
3511 } else if (iterations < 25) { | |
3512 os::sleep(Thread::current(), 1, false); | |
3513 } else { | |
3514 os::sleep(Thread::current(), 10, false); | |
3515 } | |
3516 } | |
3517 } | |
3518 | |
3519 // Called from the tight loops to possibly influence time-sharing heuristics | |
3520 void os::loop_breaker(int attempts) { | |
3521 os::yield_all(attempts); | |
3522 } | |
3523 | |
3524 | |
3525 // Interface for setting lwp priorities. If we are using T2 libthread, | |
3526 // which forces the use of BoundThreads or we manually set UseBoundThreads, | |
3527 // all of our threads will be assigned to real lwp's. Using the thr_setprio | |
3528 // function is meaningless in this mode so we must adjust the real lwp's priority | |
3529 // The routines below implement the getting and setting of lwp priorities. | |
3530 // | |
3531 // Note: There are three priority scales used on Solaris. Java priotities | |
3532 // which range from 1 to 10, libthread "thr_setprio" scale which range | |
3533 // from 0 to 127, and the current scheduling class of the process we | |
3534 // are running in. This is typically from -60 to +60. | |
3535 // The setting of the lwp priorities in done after a call to thr_setprio | |
3536 // so Java priorities are mapped to libthread priorities and we map from | |
3537 // the latter to lwp priorities. We don't keep priorities stored in | |
3538 // Java priorities since some of our worker threads want to set priorities | |
3539 // higher than all Java threads. | |
3540 // | |
3541 // For related information: | |
3542 // (1) man -s 2 priocntl | |
3543 // (2) man -s 4 priocntl | |
3544 // (3) man dispadmin | |
3545 // = librt.so | |
3546 // = libthread/common/rtsched.c - thrp_setlwpprio(). | |
3547 // = ps -cL <pid> ... to validate priority. | |
3548 // = sched_get_priority_min and _max | |
3549 // pthread_create | |
3550 // sched_setparam | |
3551 // pthread_setschedparam | |
3552 // | |
3553 // Assumptions: | |
3554 // + We assume that all threads in the process belong to the same | |
3555 // scheduling class. IE. an homogenous process. | |
3556 // + Must be root or in IA group to change change "interactive" attribute. | |
3557 // Priocntl() will fail silently. The only indication of failure is when | |
3558 // we read-back the value and notice that it hasn't changed. | |
3559 // + Interactive threads enter the runq at the head, non-interactive at the tail. | |
3560 // + For RT, change timeslice as well. Invariant: | |
3561 // constant "priority integral" | |
3562 // Konst == TimeSlice * (60-Priority) | |
3563 // Given a priority, compute appropriate timeslice. | |
3564 // + Higher numerical values have higher priority. | |
3565 | |
3566 // sched class attributes | |
3567 typedef struct { | |
3568 int schedPolicy; // classID | |
3569 int maxPrio; | |
3570 int minPrio; | |
3571 } SchedInfo; | |
3572 | |
3573 | |
3574 static SchedInfo tsLimits, iaLimits, rtLimits; | |
3575 | |
3576 #ifdef ASSERT | |
3577 static int ReadBackValidate = 1; | |
3578 #endif | |
3579 static int myClass = 0; | |
3580 static int myMin = 0; | |
3581 static int myMax = 0; | |
3582 static int myCur = 0; | |
3583 static bool priocntl_enable = false; | |
3584 | |
3585 | |
3586 // Call the version of priocntl suitable for all supported versions | |
3587 // of Solaris. We need to call through this wrapper so that we can | |
3588 // build on Solaris 9 and run on Solaris 8, 9 and 10. | |
3589 // | |
3590 // This code should be removed if we ever stop supporting Solaris 8 | |
3591 // and earlier releases. | |
3592 | |
3593 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); | |
3594 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); | |
3595 static priocntl_type priocntl_ptr = priocntl_stub; | |
3596 | |
3597 // Stub to set the value of the real pointer, and then call the real | |
3598 // function. | |
3599 | |
3600 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { | |
3601 // Try Solaris 8- name only. | |
3602 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); | |
3603 guarantee(tmp != NULL, "priocntl function not found."); | |
3604 priocntl_ptr = tmp; | |
3605 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); | |
3606 } | |
3607 | |
3608 | |
3609 // lwp_priocntl_init | |
3610 // | |
3611 // Try to determine the priority scale for our process. | |
3612 // | |
3613 // Return errno or 0 if OK. | |
3614 // | |
3615 static | |
3616 int lwp_priocntl_init () | |
3617 { | |
3618 int rslt; | |
3619 pcinfo_t ClassInfo; | |
3620 pcparms_t ParmInfo; | |
3621 int i; | |
3622 | |
3623 if (!UseThreadPriorities) return 0; | |
3624 | |
3625 // We are using Bound threads, we need to determine our priority ranges | |
3626 if (os::Solaris::T2_libthread() || UseBoundThreads) { | |
3627 // If ThreadPriorityPolicy is 1, switch tables | |
3628 if (ThreadPriorityPolicy == 1) { | |
3629 for (i = 0 ; i < MaxPriority+1; i++) | |
3630 os::java_to_os_priority[i] = prio_policy1[i]; | |
3631 } | |
3632 } | |
3633 // Not using Bound Threads, set to ThreadPolicy 1 | |
3634 else { | |
3635 for ( i = 0 ; i < MaxPriority+1; i++ ) { | |
3636 os::java_to_os_priority[i] = prio_policy1[i]; | |
3637 } | |
3638 return 0; | |
3639 } | |
3640 | |
3641 | |
3642 // Get IDs for a set of well-known scheduling classes. | |
3643 // TODO-FIXME: GETCLINFO returns the current # of classes in the | |
3644 // the system. We should have a loop that iterates over the | |
3645 // classID values, which are known to be "small" integers. | |
3646 | |
3647 strcpy(ClassInfo.pc_clname, "TS"); | |
3648 ClassInfo.pc_cid = -1; | |
3649 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
3650 if (rslt < 0) return errno; | |
3651 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); | |
3652 tsLimits.schedPolicy = ClassInfo.pc_cid; | |
3653 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; | |
3654 tsLimits.minPrio = -tsLimits.maxPrio; | |
3655 | |
3656 strcpy(ClassInfo.pc_clname, "IA"); | |
3657 ClassInfo.pc_cid = -1; | |
3658 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
3659 if (rslt < 0) return errno; | |
3660 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); | |
3661 iaLimits.schedPolicy = ClassInfo.pc_cid; | |
3662 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; | |
3663 iaLimits.minPrio = -iaLimits.maxPrio; | |
3664 | |
3665 strcpy(ClassInfo.pc_clname, "RT"); | |
3666 ClassInfo.pc_cid = -1; | |
3667 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); | |
3668 if (rslt < 0) return errno; | |
3669 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); | |
3670 rtLimits.schedPolicy = ClassInfo.pc_cid; | |
3671 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; | |
3672 rtLimits.minPrio = 0; | |
3673 | |
3674 | |
3675 // Query our "current" scheduling class. | |
3676 // This will normally be IA,TS or, rarely, RT. | |
3677 memset (&ParmInfo, 0, sizeof(ParmInfo)); | |
3678 ParmInfo.pc_cid = PC_CLNULL; | |
3679 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); | |
3680 if ( rslt < 0 ) return errno; | |
3681 myClass = ParmInfo.pc_cid; | |
3682 | |
3683 // We now know our scheduling classId, get specific information | |
3684 // the class. | |
3685 ClassInfo.pc_cid = myClass; | |
3686 ClassInfo.pc_clname[0] = 0; | |
3687 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); | |
3688 if ( rslt < 0 ) return errno; | |
3689 | |
3690 if (ThreadPriorityVerbose) | |
3691 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); | |
3692 | |
3693 memset(&ParmInfo, 0, sizeof(pcparms_t)); | |
3694 ParmInfo.pc_cid = PC_CLNULL; | |
3695 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); | |
3696 if (rslt < 0) return errno; | |
3697 | |
3698 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
3699 myMin = rtLimits.minPrio; | |
3700 myMax = rtLimits.maxPrio; | |
3701 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
3702 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; | |
3703 myMin = iaLimits.minPrio; | |
3704 myMax = iaLimits.maxPrio; | |
3705 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict | |
3706 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
3707 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; | |
3708 myMin = tsLimits.minPrio; | |
3709 myMax = tsLimits.maxPrio; | |
3710 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict | |
3711 } else { | |
3712 // No clue - punt | |
3713 if (ThreadPriorityVerbose) | |
3714 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); | |
3715 return EINVAL; // no clue, punt | |
3716 } | |
3717 | |
3718 if (ThreadPriorityVerbose) | |
3719 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); | |
3720 | |
3721 priocntl_enable = true; // Enable changing priorities | |
3722 return 0; | |
3723 } | |
3724 | |
3725 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) | |
3726 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) | |
3727 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) | |
3728 | |
3729 | |
3730 // scale_to_lwp_priority | |
3731 // | |
3732 // Convert from the libthread "thr_setprio" scale to our current | |
3733 // lwp scheduling class scale. | |
3734 // | |
3735 static | |
3736 int scale_to_lwp_priority (int rMin, int rMax, int x) | |
3737 { | |
3738 int v; | |
3739 | |
3740 if (x == 127) return rMax; // avoid round-down | |
3741 v = (((x*(rMax-rMin)))/128)+rMin; | |
3742 return v; | |
3743 } | |
3744 | |
3745 | |
3746 // set_lwp_priority | |
3747 // | |
3748 // Set the priority of the lwp. This call should only be made | |
3749 // when using bound threads (T2 threads are bound by default). | |
3750 // | |
3751 int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) | |
3752 { | |
3753 int rslt; | |
3754 int Actual, Expected, prv; | |
3755 pcparms_t ParmInfo; // for GET-SET | |
3756 #ifdef ASSERT | |
3757 pcparms_t ReadBack; // for readback | |
3758 #endif | |
3759 | |
3760 // Set priority via PC_GETPARMS, update, PC_SETPARMS | |
3761 // Query current values. | |
3762 // TODO: accelerate this by eliminating the PC_GETPARMS call. | |
3763 // Cache "pcparms_t" in global ParmCache. | |
3764 // TODO: elide set-to-same-value | |
3765 | |
3766 // If something went wrong on init, don't change priorities. | |
3767 if ( !priocntl_enable ) { | |
3768 if (ThreadPriorityVerbose) | |
3769 tty->print_cr("Trying to set priority but init failed, ignoring"); | |
3770 return EINVAL; | |
3771 } | |
3772 | |
3773 | |
3774 // If lwp hasn't started yet, just return | |
3775 // the _start routine will call us again. | |
3776 if ( lwpid <= 0 ) { | |
3777 if (ThreadPriorityVerbose) { | |
3778 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", | |
3779 ThreadID, newPrio); | |
3780 } | |
3781 return 0; | |
3782 } | |
3783 | |
3784 if (ThreadPriorityVerbose) { | |
3785 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", | |
3786 ThreadID, lwpid, newPrio); | |
3787 } | |
3788 | |
3789 memset(&ParmInfo, 0, sizeof(pcparms_t)); | |
3790 ParmInfo.pc_cid = PC_CLNULL; | |
3791 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); | |
3792 if (rslt < 0) return errno; | |
3793 | |
3794 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
3795 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; | |
3796 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); | |
3797 rtInfo->rt_tqsecs = RT_NOCHANGE; | |
3798 rtInfo->rt_tqnsecs = RT_NOCHANGE; | |
3799 if (ThreadPriorityVerbose) { | |
3800 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); | |
3801 } | |
3802 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
3803 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; | |
3804 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); | |
3805 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); | |
3806 iaInfo->ia_uprilim = IA_NOCHANGE; | |
3807 iaInfo->ia_mode = IA_NOCHANGE; | |
3808 if (ThreadPriorityVerbose) { | |
3809 tty->print_cr ("IA: [%d...%d] %d->%d\n", | |
3810 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); | |
3811 } | |
3812 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
3813 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; | |
3814 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); | |
3815 prv = tsInfo->ts_upri; | |
3816 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); | |
3817 tsInfo->ts_uprilim = IA_NOCHANGE; | |
3818 if (ThreadPriorityVerbose) { | |
3819 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", | |
3820 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); | |
3821 } | |
3822 if (prv == tsInfo->ts_upri) return 0; | |
3823 } else { | |
3824 if ( ThreadPriorityVerbose ) { | |
3825 tty->print_cr ("Unknown scheduling class\n"); | |
3826 } | |
3827 return EINVAL; // no clue, punt | |
3828 } | |
3829 | |
3830 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); | |
3831 if (ThreadPriorityVerbose && rslt) { | |
3832 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); | |
3833 } | |
3834 if (rslt < 0) return errno; | |
3835 | |
3836 #ifdef ASSERT | |
3837 // Sanity check: read back what we just attempted to set. | |
3838 // In theory it could have changed in the interim ... | |
3839 // | |
3840 // The priocntl system call is tricky. | |
3841 // Sometimes it'll validate the priority value argument and | |
3842 // return EINVAL if unhappy. At other times it fails silently. | |
3843 // Readbacks are prudent. | |
3844 | |
3845 if (!ReadBackValidate) return 0; | |
3846 | |
3847 memset(&ReadBack, 0, sizeof(pcparms_t)); | |
3848 ReadBack.pc_cid = PC_CLNULL; | |
3849 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); | |
3850 assert(rslt >= 0, "priocntl failed"); | |
3851 Actual = Expected = 0xBAD; | |
3852 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); | |
3853 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { | |
3854 Actual = RTPRI(ReadBack)->rt_pri; | |
3855 Expected = RTPRI(ParmInfo)->rt_pri; | |
3856 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { | |
3857 Actual = IAPRI(ReadBack)->ia_upri; | |
3858 Expected = IAPRI(ParmInfo)->ia_upri; | |
3859 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { | |
3860 Actual = TSPRI(ReadBack)->ts_upri; | |
3861 Expected = TSPRI(ParmInfo)->ts_upri; | |
3862 } else { | |
3863 if ( ThreadPriorityVerbose ) { | |
3864 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); | |
3865 } | |
3866 } | |
3867 | |
3868 if (Actual != Expected) { | |
3869 if ( ThreadPriorityVerbose ) { | |
3870 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", | |
3871 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); | |
3872 } | |
3873 } | |
3874 #endif | |
3875 | |
3876 return 0; | |
3877 } | |
3878 | |
3879 | |
3880 | |
3881 // Solaris only gives access to 128 real priorities at a time, | |
3882 // so we expand Java's ten to fill this range. This would be better | |
3883 // if we dynamically adjusted relative priorities. | |
3884 // | |
3885 // The ThreadPriorityPolicy option allows us to select 2 different | |
3886 // priority scales. | |
3887 // | |
3888 // ThreadPriorityPolicy=0 | |
3889 // Since the Solaris' default priority is MaximumPriority, we do not | |
3890 // set a priority lower than Max unless a priority lower than | |
3891 // NormPriority is requested. | |
3892 // | |
3893 // ThreadPriorityPolicy=1 | |
3894 // This mode causes the priority table to get filled with | |
3895 // linear values. NormPriority get's mapped to 50% of the | |
3896 // Maximum priority an so on. This will cause VM threads | |
3897 // to get unfair treatment against other Solaris processes | |
3898 // which do not explicitly alter their thread priorities. | |
3899 // | |
3900 | |
3901 | |
3902 int os::java_to_os_priority[MaxPriority + 1] = { | |
3903 -99999, // 0 Entry should never be used | |
3904 | |
3905 0, // 1 MinPriority | |
3906 32, // 2 | |
3907 64, // 3 | |
3908 | |
3909 96, // 4 | |
3910 127, // 5 NormPriority | |
3911 127, // 6 | |
3912 | |
3913 127, // 7 | |
3914 127, // 8 | |
3915 127, // 9 NearMaxPriority | |
3916 | |
3917 127 // 10 MaxPriority | |
3918 }; | |
3919 | |
3920 | |
3921 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
3922 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); | |
3923 if ( !UseThreadPriorities ) return OS_OK; | |
3924 int status = thr_setprio(thread->osthread()->thread_id(), newpri); | |
3925 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) | |
3926 status |= (set_lwp_priority (thread->osthread()->thread_id(), | |
3927 thread->osthread()->lwp_id(), newpri )); | |
3928 return (status == 0) ? OS_OK : OS_ERR; | |
3929 } | |
3930 | |
3931 | |
3932 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
3933 int p; | |
3934 if ( !UseThreadPriorities ) { | |
3935 *priority_ptr = NormalPriority; | |
3936 return OS_OK; | |
3937 } | |
3938 int status = thr_getprio(thread->osthread()->thread_id(), &p); | |
3939 if (status != 0) { | |
3940 return OS_ERR; | |
3941 } | |
3942 *priority_ptr = p; | |
3943 return OS_OK; | |
3944 } | |
3945 | |
3946 | |
3947 // Hint to the underlying OS that a task switch would not be good. | |
3948 // Void return because it's a hint and can fail. | |
3949 void os::hint_no_preempt() { | |
3950 schedctl_start(schedctl_init()); | |
3951 } | |
3952 | |
3953 void os::interrupt(Thread* thread) { | |
3954 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); | |
3955 | |
3956 OSThread* osthread = thread->osthread(); | |
3957 | |
3958 int isInterrupted = osthread->interrupted(); | |
3959 if (!isInterrupted) { | |
3960 osthread->set_interrupted(true); | |
3961 OrderAccess::fence(); | |
3962 // os::sleep() is implemented with either poll (NULL,0,timeout) or | |
3963 // by parking on _SleepEvent. If the former, thr_kill will unwedge | |
3964 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. | |
3965 ParkEvent * const slp = thread->_SleepEvent ; | |
3966 if (slp != NULL) slp->unpark() ; | |
3967 } | |
3968 | |
3969 // For JSR166: unpark after setting status but before thr_kill -dl | |
3970 if (thread->is_Java_thread()) { | |
3971 ((JavaThread*)thread)->parker()->unpark(); | |
3972 } | |
3973 | |
3974 // Handle interruptible wait() ... | |
3975 ParkEvent * const ev = thread->_ParkEvent ; | |
3976 if (ev != NULL) ev->unpark() ; | |
3977 | |
3978 // When events are used everywhere for os::sleep, then this thr_kill | |
3979 // will only be needed if UseVMInterruptibleIO is true. | |
3980 | |
3981 if (!isInterrupted) { | |
3982 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); | |
3983 assert_status(status == 0, status, "thr_kill"); | |
3984 | |
3985 // Bump thread interruption counter | |
3986 RuntimeService::record_thread_interrupt_signaled_count(); | |
3987 } | |
3988 } | |
3989 | |
3990 | |
3991 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
3992 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); | |
3993 | |
3994 OSThread* osthread = thread->osthread(); | |
3995 | |
3996 bool res = osthread->interrupted(); | |
3997 | |
3998 // NOTE that since there is no "lock" around these two operations, | |
3999 // there is the possibility that the interrupted flag will be | |
4000 // "false" but that the interrupt event will be set. This is | |
4001 // intentional. The effect of this is that Object.wait() will appear | |
4002 // to have a spurious wakeup, which is not harmful, and the | |
4003 // possibility is so rare that it is not worth the added complexity | |
4004 // to add yet another lock. It has also been recommended not to put | |
4005 // the interrupted flag into the os::Solaris::Event structure, | |
4006 // because it hides the issue. | |
4007 if (res && clear_interrupted) { | |
4008 osthread->set_interrupted(false); | |
4009 } | |
4010 return res; | |
4011 } | |
4012 | |
4013 | |
4014 void os::print_statistics() { | |
4015 } | |
4016 | |
4017 int os::message_box(const char* title, const char* message) { | |
4018 int i; | |
4019 fdStream err(defaultStream::error_fd()); | |
4020 for (i = 0; i < 78; i++) err.print_raw("="); | |
4021 err.cr(); | |
4022 err.print_raw_cr(title); | |
4023 for (i = 0; i < 78; i++) err.print_raw("-"); | |
4024 err.cr(); | |
4025 err.print_raw_cr(message); | |
4026 for (i = 0; i < 78; i++) err.print_raw("="); | |
4027 err.cr(); | |
4028 | |
4029 char buf[16]; | |
4030 // Prevent process from exiting upon "read error" without consuming all CPU | |
4031 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
4032 | |
4033 return buf[0] == 'y' || buf[0] == 'Y'; | |
4034 } | |
4035 | |
4036 // A lightweight implementation that does not suspend the target thread and | |
4037 // thus returns only a hint. Used for profiling only! | |
4038 ExtendedPC os::get_thread_pc(Thread* thread) { | |
4039 // Make sure that it is called by the watcher and the Threads lock is owned. | |
4040 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); | |
4041 // For now, is only used to profile the VM Thread | |
4042 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
4043 ExtendedPC epc; | |
4044 | |
4045 GetThreadPC_Callback cb(ProfileVM_lock); | |
4046 OSThread *osthread = thread->osthread(); | |
4047 const int time_to_wait = 400; // 400ms wait for initial response | |
4048 int status = cb.interrupt(thread, time_to_wait); | |
4049 | |
4050 if (cb.is_done() ) { | |
4051 epc = cb.addr(); | |
4052 } else { | |
4053 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", | |
4054 osthread->thread_id(), status);); | |
4055 // epc is already NULL | |
4056 } | |
4057 return epc; | |
4058 } | |
4059 | |
4060 | |
4061 // This does not do anything on Solaris. This is basically a hook for being | |
4062 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32. | |
4063 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { | |
4064 f(value, method, args, thread); | |
4065 } | |
4066 | |
4067 // This routine may be used by user applications as a "hook" to catch signals. | |
4068 // The user-defined signal handler must pass unrecognized signals to this | |
4069 // routine, and if it returns true (non-zero), then the signal handler must | |
4070 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
4071 // routine will never retun false (zero), but instead will execute a VM panic | |
4072 // routine kill the process. | |
4073 // | |
4074 // If this routine returns false, it is OK to call it again. This allows | |
4075 // the user-defined signal handler to perform checks either before or after | |
4076 // the VM performs its own checks. Naturally, the user code would be making | |
4077 // a serious error if it tried to handle an exception (such as a null check | |
4078 // or breakpoint) that the VM was generating for its own correct operation. | |
4079 // | |
4080 // This routine may recognize any of the following kinds of signals: | |
4081 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, | |
4082 // os::Solaris::SIGasync | |
4083 // It should be consulted by handlers for any of those signals. | |
4084 // It explicitly does not recognize os::Solaris::SIGinterrupt | |
4085 // | |
4086 // The caller of this routine must pass in the three arguments supplied | |
4087 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
4088 // field of the structure passed to sigaction(). This routine assumes that | |
4089 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
4090 // | |
4091 // Note that the VM will print warnings if it detects conflicting signal | |
4092 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
4093 // | |
4094 extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); | |
4095 | |
4096 | |
4097 void signalHandler(int sig, siginfo_t* info, void* ucVoid) { | |
4098 JVM_handle_solaris_signal(sig, info, ucVoid, true); | |
4099 } | |
4100 | |
4101 /* Do not delete - if guarantee is ever removed, a signal handler (even empty) | |
4102 is needed to provoke threads blocked on IO to return an EINTR | |
4103 Note: this explicitly does NOT call JVM_handle_solaris_signal and | |
4104 does NOT participate in signal chaining due to requirement for | |
4105 NOT setting SA_RESTART to make EINTR work. */ | |
4106 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { | |
4107 if (UseSignalChaining) { | |
4108 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); | |
4109 if (actp && actp->sa_handler) { | |
4110 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); | |
4111 } | |
4112 } | |
4113 } | |
4114 | |
4115 // This boolean allows users to forward their own non-matching signals | |
4116 // to JVM_handle_solaris_signal, harmlessly. | |
4117 bool os::Solaris::signal_handlers_are_installed = false; | |
4118 | |
4119 // For signal-chaining | |
4120 bool os::Solaris::libjsig_is_loaded = false; | |
4121 typedef struct sigaction *(*get_signal_t)(int); | |
4122 get_signal_t os::Solaris::get_signal_action = NULL; | |
4123 | |
4124 struct sigaction* os::Solaris::get_chained_signal_action(int sig) { | |
4125 struct sigaction *actp = NULL; | |
4126 | |
4127 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { | |
4128 // Retrieve the old signal handler from libjsig | |
4129 actp = (*get_signal_action)(sig); | |
4130 } | |
4131 if (actp == NULL) { | |
4132 // Retrieve the preinstalled signal handler from jvm | |
4133 actp = get_preinstalled_handler(sig); | |
4134 } | |
4135 | |
4136 return actp; | |
4137 } | |
4138 | |
4139 static bool call_chained_handler(struct sigaction *actp, int sig, | |
4140 siginfo_t *siginfo, void *context) { | |
4141 // Call the old signal handler | |
4142 if (actp->sa_handler == SIG_DFL) { | |
4143 // It's more reasonable to let jvm treat it as an unexpected exception | |
4144 // instead of taking the default action. | |
4145 return false; | |
4146 } else if (actp->sa_handler != SIG_IGN) { | |
4147 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
4148 // automaticlly block the signal | |
4149 sigaddset(&(actp->sa_mask), sig); | |
4150 } | |
4151 | |
4152 sa_handler_t hand; | |
4153 sa_sigaction_t sa; | |
4154 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; | |
4155 // retrieve the chained handler | |
4156 if (siginfo_flag_set) { | |
4157 sa = actp->sa_sigaction; | |
4158 } else { | |
4159 hand = actp->sa_handler; | |
4160 } | |
4161 | |
4162 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
4163 actp->sa_handler = SIG_DFL; | |
4164 } | |
4165 | |
4166 // try to honor the signal mask | |
4167 sigset_t oset; | |
4168 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
4169 | |
4170 // call into the chained handler | |
4171 if (siginfo_flag_set) { | |
4172 (*sa)(sig, siginfo, context); | |
4173 } else { | |
4174 (*hand)(sig); | |
4175 } | |
4176 | |
4177 // restore the signal mask | |
4178 thr_sigsetmask(SIG_SETMASK, &oset, 0); | |
4179 } | |
4180 // Tell jvm's signal handler the signal is taken care of. | |
4181 return true; | |
4182 } | |
4183 | |
4184 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
4185 bool chained = false; | |
4186 // signal-chaining | |
4187 if (UseSignalChaining) { | |
4188 struct sigaction *actp = get_chained_signal_action(sig); | |
4189 if (actp != NULL) { | |
4190 chained = call_chained_handler(actp, sig, siginfo, context); | |
4191 } | |
4192 } | |
4193 return chained; | |
4194 } | |
4195 | |
4196 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { | |
4197 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); | |
4198 if (preinstalled_sigs[sig] != 0) { | |
4199 return &chainedsigactions[sig]; | |
4200 } | |
4201 return NULL; | |
4202 } | |
4203 | |
4204 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
4205 | |
4206 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); | |
4207 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); | |
4208 chainedsigactions[sig] = oldAct; | |
4209 preinstalled_sigs[sig] = 1; | |
4210 } | |
4211 | |
4212 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { | |
4213 // Check for overwrite. | |
4214 struct sigaction oldAct; | |
4215 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
4216 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
4217 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
4218 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
4219 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
4220 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { | |
4221 if (AllowUserSignalHandlers || !set_installed) { | |
4222 // Do not overwrite; user takes responsibility to forward to us. | |
4223 return; | |
4224 } else if (UseSignalChaining) { | |
4225 if (oktochain) { | |
4226 // save the old handler in jvm | |
4227 save_preinstalled_handler(sig, oldAct); | |
4228 } else { | |
4229 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); | |
4230 } | |
4231 // libjsig also interposes the sigaction() call below and saves the | |
4232 // old sigaction on it own. | |
4233 } else { | |
4234 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); | |
4235 } | |
4236 } | |
4237 | |
4238 struct sigaction sigAct; | |
4239 sigfillset(&(sigAct.sa_mask)); | |
4240 sigAct.sa_handler = SIG_DFL; | |
4241 | |
4242 sigAct.sa_sigaction = signalHandler; | |
4243 // Handle SIGSEGV on alternate signal stack if | |
4244 // not using stack banging | |
4245 if (!UseStackBanging && sig == SIGSEGV) { | |
4246 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; | |
4247 // Interruptible i/o requires SA_RESTART cleared so EINTR | |
4248 // is returned instead of restarting system calls | |
4249 } else if (sig == os::Solaris::SIGinterrupt()) { | |
4250 sigemptyset(&sigAct.sa_mask); | |
4251 sigAct.sa_handler = NULL; | |
4252 sigAct.sa_flags = SA_SIGINFO; | |
4253 sigAct.sa_sigaction = sigINTRHandler; | |
4254 } else { | |
4255 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; | |
4256 } | |
4257 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); | |
4258 | |
4259 sigaction(sig, &sigAct, &oldAct); | |
4260 | |
4261 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
4262 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
4263 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
4264 } | |
4265 | |
4266 | |
4267 #define DO_SIGNAL_CHECK(sig) \ | |
4268 if (!sigismember(&check_signal_done, sig)) \ | |
4269 os::Solaris::check_signal_handler(sig) | |
4270 | |
4271 // This method is a periodic task to check for misbehaving JNI applications | |
4272 // under CheckJNI, we can add any periodic checks here | |
4273 | |
4274 void os::run_periodic_checks() { | |
4275 // A big source of grief is hijacking virt. addr 0x0 on Solaris, | |
4276 // thereby preventing a NULL checks. | |
4277 if(!check_addr0_done) check_addr0_done = check_addr0(tty); | |
4278 | |
4279 if (check_signals == false) return; | |
4280 | |
4281 // SEGV and BUS if overridden could potentially prevent | |
4282 // generation of hs*.log in the event of a crash, debugging | |
4283 // such a case can be very challenging, so we absolutely | |
4284 // check for the following for a good measure: | |
4285 DO_SIGNAL_CHECK(SIGSEGV); | |
4286 DO_SIGNAL_CHECK(SIGILL); | |
4287 DO_SIGNAL_CHECK(SIGFPE); | |
4288 DO_SIGNAL_CHECK(SIGBUS); | |
4289 DO_SIGNAL_CHECK(SIGPIPE); | |
4290 DO_SIGNAL_CHECK(SIGXFSZ); | |
4291 | |
4292 // ReduceSignalUsage allows the user to override these handlers | |
4293 // see comments at the very top and jvm_solaris.h | |
4294 if (!ReduceSignalUsage) { | |
4295 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
4296 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
4297 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
4298 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
4299 } | |
4300 | |
4301 // See comments above for using JVM1/JVM2 and UseAltSigs | |
4302 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); | |
4303 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); | |
4304 | |
4305 } | |
4306 | |
4307 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
4308 | |
4309 static os_sigaction_t os_sigaction = NULL; | |
4310 | |
4311 void os::Solaris::check_signal_handler(int sig) { | |
4312 char buf[O_BUFLEN]; | |
4313 address jvmHandler = NULL; | |
4314 | |
4315 struct sigaction act; | |
4316 if (os_sigaction == NULL) { | |
4317 // only trust the default sigaction, in case it has been interposed | |
4318 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
4319 if (os_sigaction == NULL) return; | |
4320 } | |
4321 | |
4322 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
4323 | |
4324 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
4325 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
4326 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
4327 | |
4328 | |
4329 switch(sig) { | |
4330 case SIGSEGV: | |
4331 case SIGBUS: | |
4332 case SIGFPE: | |
4333 case SIGPIPE: | |
4334 case SIGXFSZ: | |
4335 case SIGILL: | |
4336 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); | |
4337 break; | |
4338 | |
4339 case SHUTDOWN1_SIGNAL: | |
4340 case SHUTDOWN2_SIGNAL: | |
4341 case SHUTDOWN3_SIGNAL: | |
4342 case BREAK_SIGNAL: | |
4343 jvmHandler = (address)user_handler(); | |
4344 break; | |
4345 | |
4346 default: | |
4347 int intrsig = os::Solaris::SIGinterrupt(); | |
4348 int asynsig = os::Solaris::SIGasync(); | |
4349 | |
4350 if (sig == intrsig) { | |
4351 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); | |
4352 } else if (sig == asynsig) { | |
4353 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); | |
4354 } else { | |
4355 return; | |
4356 } | |
4357 break; | |
4358 } | |
4359 | |
4360 | |
4361 if (thisHandler != jvmHandler) { | |
4362 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
4363 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
4364 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
4365 // No need to check this sig any longer | |
4366 sigaddset(&check_signal_done, sig); | |
4367 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { | |
4368 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
4369 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); | |
4370 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
4371 // No need to check this sig any longer | |
4372 sigaddset(&check_signal_done, sig); | |
4373 } | |
4374 | |
4375 // Print all the signal handler state | |
4376 if (sigismember(&check_signal_done, sig)) { | |
4377 print_signal_handlers(tty, buf, O_BUFLEN); | |
4378 } | |
4379 | |
4380 } | |
4381 | |
4382 void os::Solaris::install_signal_handlers() { | |
4383 bool libjsigdone = false; | |
4384 signal_handlers_are_installed = true; | |
4385 | |
4386 // signal-chaining | |
4387 typedef void (*signal_setting_t)(); | |
4388 signal_setting_t begin_signal_setting = NULL; | |
4389 signal_setting_t end_signal_setting = NULL; | |
4390 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
4391 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
4392 if (begin_signal_setting != NULL) { | |
4393 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
4394 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
4395 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
4396 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
4397 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, | |
4398 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); | |
4399 libjsig_is_loaded = true; | |
4400 if (os::Solaris::get_libjsig_version != NULL) { | |
4401 libjsigversion = (*os::Solaris::get_libjsig_version)(); | |
4402 } | |
4403 assert(UseSignalChaining, "should enable signal-chaining"); | |
4404 } | |
4405 if (libjsig_is_loaded) { | |
4406 // Tell libjsig jvm is setting signal handlers | |
4407 (*begin_signal_setting)(); | |
4408 } | |
4409 | |
4410 set_signal_handler(SIGSEGV, true, true); | |
4411 set_signal_handler(SIGPIPE, true, true); | |
4412 set_signal_handler(SIGXFSZ, true, true); | |
4413 set_signal_handler(SIGBUS, true, true); | |
4414 set_signal_handler(SIGILL, true, true); | |
4415 set_signal_handler(SIGFPE, true, true); | |
4416 | |
4417 | |
4418 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { | |
4419 | |
4420 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so | |
4421 // can not register overridable signals which might be > 32 | |
4422 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { | |
4423 // Tell libjsig jvm has finished setting signal handlers | |
4424 (*end_signal_setting)(); | |
4425 libjsigdone = true; | |
4426 } | |
4427 } | |
4428 | |
4429 // Never ok to chain our SIGinterrupt | |
4430 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); | |
4431 set_signal_handler(os::Solaris::SIGasync(), true, true); | |
4432 | |
4433 if (libjsig_is_loaded && !libjsigdone) { | |
4434 // Tell libjsig jvm finishes setting signal handlers | |
4435 (*end_signal_setting)(); | |
4436 } | |
4437 | |
4438 // We don't activate signal checker if libjsig is in place, we trust ourselves | |
4439 // and if UserSignalHandler is installed all bets are off | |
4440 if (CheckJNICalls) { | |
4441 if (libjsig_is_loaded) { | |
4442 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); | |
4443 check_signals = false; | |
4444 } | |
4445 if (AllowUserSignalHandlers) { | |
4446 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); | |
4447 check_signals = false; | |
4448 } | |
4449 } | |
4450 } | |
4451 | |
4452 | |
4453 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); | |
4454 | |
4455 const char * signames[] = { | |
4456 "SIG0", | |
4457 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", | |
4458 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", | |
4459 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", | |
4460 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", | |
4461 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", | |
4462 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", | |
4463 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", | |
4464 "SIGCANCEL", "SIGLOST" | |
4465 }; | |
4466 | |
4467 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
4468 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
4469 // signal | |
4470 if (exception_code < sizeof(signames)/sizeof(const char*)) { | |
4471 jio_snprintf(buf, size, "%s", signames[exception_code]); | |
4472 } else { | |
4473 jio_snprintf(buf, size, "SIG%d", exception_code); | |
4474 } | |
4475 return buf; | |
4476 } else { | |
4477 return NULL; | |
4478 } | |
4479 } | |
4480 | |
4481 // (Static) wrappers for the new libthread API | |
4482 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; | |
4483 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; | |
4484 int_fnP_thread_t_i os::Solaris::_thr_setmutator; | |
4485 int_fnP_thread_t os::Solaris::_thr_suspend_mutator; | |
4486 int_fnP_thread_t os::Solaris::_thr_continue_mutator; | |
4487 | |
641
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4488 // (Static) wrapper for getisax(2) call. |
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4489 os::Solaris::getisax_func_t os::Solaris::_getisax = 0; |
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4490 |
0 | 4491 // (Static) wrappers for the liblgrp API |
4492 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; | |
4493 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; | |
4494 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; | |
4495 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; | |
4496 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; | |
144
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4497 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; |
0 | 4498 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; |
4499 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; | |
4500 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; | |
4501 | |
4502 // (Static) wrapper for meminfo() call. | |
4503 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; | |
4504 | |
641
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4505 static address resolve_symbol_lazy(const char* name) { |
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4506 address addr = (address) dlsym(RTLD_DEFAULT, name); |
0 | 4507 if(addr == NULL) { |
4508 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 | |
4509 addr = (address) dlsym(RTLD_NEXT, name); | |
641
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4510 } |
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4511 return addr; |
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|
4512 } |
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4513 |
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4514 static address resolve_symbol(const char* name) { |
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4515 address addr = resolve_symbol_lazy(name); |
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4516 if(addr == NULL) { |
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4517 fatal(dlerror()); |
0 | 4518 } |
4519 return addr; | |
4520 } | |
4521 | |
4522 | |
4523 | |
4524 // isT2_libthread() | |
4525 // | |
4526 // Routine to determine if we are currently using the new T2 libthread. | |
4527 // | |
4528 // We determine if we are using T2 by reading /proc/self/lstatus and | |
4529 // looking for a thread with the ASLWP bit set. If we find this status | |
4530 // bit set, we must assume that we are NOT using T2. The T2 team | |
4531 // has approved this algorithm. | |
4532 // | |
4533 // We need to determine if we are running with the new T2 libthread | |
4534 // since setting native thread priorities is handled differently | |
4535 // when using this library. All threads created using T2 are bound | |
4536 // threads. Calling thr_setprio is meaningless in this case. | |
4537 // | |
4538 bool isT2_libthread() { | |
4539 static prheader_t * lwpArray = NULL; | |
4540 static int lwpSize = 0; | |
4541 static int lwpFile = -1; | |
4542 lwpstatus_t * that; | |
4543 char lwpName [128]; | |
4544 bool isT2 = false; | |
4545 | |
4546 #define ADR(x) ((uintptr_t)(x)) | |
4547 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) | |
4548 | |
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4549 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); |
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4550 if (lwpFile < 0) { |
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4551 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); |
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4552 return false; |
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4553 } |
0 | 4554 lwpSize = 16*1024; |
4555 for (;;) { | |
4556 lseek (lwpFile, 0, SEEK_SET); | |
89
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4557 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); |
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4558 if (read(lwpFile, lwpArray, lwpSize) < 0) { |
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4559 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); |
0 | 4560 break; |
4561 } | |
89
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4562 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { |
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4563 // We got a good snapshot - now iterate over the list. |
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4564 int aslwpcount = 0; |
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4565 for (int i = 0; i < lwpArray->pr_nent; i++ ) { |
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4566 that = LWPINDEX(lwpArray,i); |
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4567 if (that->pr_flags & PR_ASLWP) { |
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4568 aslwpcount++; |
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|
4569 } |
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|
4570 } |
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4571 if (aslwpcount == 0) isT2 = true; |
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4572 break; |
0 | 4573 } |
89
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4574 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; |
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4575 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. |
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4576 } |
0 | 4577 |
4578 FREE_C_HEAP_ARRAY(char, lwpArray); | |
4579 close (lwpFile); | |
89
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4580 if (ThreadPriorityVerbose) { |
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4581 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); |
0 | 4582 else tty->print_cr("We are not running with a T2 libthread\n"); |
4583 } | |
89
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4584 return isT2; |
0 | 4585 } |
4586 | |
4587 | |
4588 void os::Solaris::libthread_init() { | |
4589 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); | |
4590 | |
4591 // Determine if we are running with the new T2 libthread | |
4592 os::Solaris::set_T2_libthread(isT2_libthread()); | |
4593 | |
4594 lwp_priocntl_init(); | |
4595 | |
4596 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 | |
4597 if(func == NULL) { | |
4598 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); | |
4599 // Guarantee that this VM is running on an new enough OS (5.6 or | |
4600 // later) that it will have a new enough libthread.so. | |
4601 guarantee(func != NULL, "libthread.so is too old."); | |
4602 } | |
4603 | |
4604 // Initialize the new libthread getstate API wrappers | |
4605 func = resolve_symbol("thr_getstate"); | |
4606 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); | |
4607 | |
4608 func = resolve_symbol("thr_setstate"); | |
4609 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); | |
4610 | |
4611 func = resolve_symbol("thr_setmutator"); | |
4612 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); | |
4613 | |
4614 func = resolve_symbol("thr_suspend_mutator"); | |
4615 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); | |
4616 | |
4617 func = resolve_symbol("thr_continue_mutator"); | |
4618 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); | |
4619 | |
4620 int size; | |
4621 void (*handler_info_func)(address *, int *); | |
4622 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); | |
4623 handler_info_func(&handler_start, &size); | |
4624 handler_end = handler_start + size; | |
4625 } | |
4626 | |
4627 | |
4628 int_fnP_mutex_tP os::Solaris::_mutex_lock; | |
4629 int_fnP_mutex_tP os::Solaris::_mutex_trylock; | |
4630 int_fnP_mutex_tP os::Solaris::_mutex_unlock; | |
4631 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; | |
4632 int_fnP_mutex_tP os::Solaris::_mutex_destroy; | |
4633 int os::Solaris::_mutex_scope = USYNC_THREAD; | |
4634 | |
4635 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; | |
4636 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; | |
4637 int_fnP_cond_tP os::Solaris::_cond_signal; | |
4638 int_fnP_cond_tP os::Solaris::_cond_broadcast; | |
4639 int_fnP_cond_tP_i_vP os::Solaris::_cond_init; | |
4640 int_fnP_cond_tP os::Solaris::_cond_destroy; | |
4641 int os::Solaris::_cond_scope = USYNC_THREAD; | |
4642 | |
4643 void os::Solaris::synchronization_init() { | |
4644 if(UseLWPSynchronization) { | |
4645 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); | |
4646 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); | |
4647 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); | |
4648 os::Solaris::set_mutex_init(lwp_mutex_init); | |
4649 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); | |
4650 os::Solaris::set_mutex_scope(USYNC_THREAD); | |
4651 | |
4652 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); | |
4653 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); | |
4654 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); | |
4655 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); | |
4656 os::Solaris::set_cond_init(lwp_cond_init); | |
4657 os::Solaris::set_cond_destroy(lwp_cond_destroy); | |
4658 os::Solaris::set_cond_scope(USYNC_THREAD); | |
4659 } | |
4660 else { | |
4661 os::Solaris::set_mutex_scope(USYNC_THREAD); | |
4662 os::Solaris::set_cond_scope(USYNC_THREAD); | |
4663 | |
4664 if(UsePthreads) { | |
4665 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); | |
4666 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); | |
4667 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); | |
4668 os::Solaris::set_mutex_init(pthread_mutex_default_init); | |
4669 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); | |
4670 | |
4671 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); | |
4672 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); | |
4673 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); | |
4674 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); | |
4675 os::Solaris::set_cond_init(pthread_cond_default_init); | |
4676 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); | |
4677 } | |
4678 else { | |
4679 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); | |
4680 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); | |
4681 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); | |
4682 os::Solaris::set_mutex_init(::mutex_init); | |
4683 os::Solaris::set_mutex_destroy(::mutex_destroy); | |
4684 | |
4685 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); | |
4686 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); | |
4687 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); | |
4688 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); | |
4689 os::Solaris::set_cond_init(::cond_init); | |
4690 os::Solaris::set_cond_destroy(::cond_destroy); | |
4691 } | |
4692 } | |
4693 } | |
4694 | |
462
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4695 bool os::Solaris::liblgrp_init() { |
267
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4696 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); |
0 | 4697 if (handle != NULL) { |
4698 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); | |
4699 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); | |
4700 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); | |
4701 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); | |
4702 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); | |
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4703 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); |
0 | 4704 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); |
4705 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, | |
4706 dlsym(handle, "lgrp_cookie_stale"))); | |
4707 | |
4708 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); | |
4709 set_lgrp_cookie(c); | |
462
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4710 return true; |
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4711 } |
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4712 return false; |
0 | 4713 } |
4714 | |
4715 void os::Solaris::misc_sym_init() { | |
641
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4716 address func; |
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4717 |
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4718 // getisax |
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4719 func = resolve_symbol_lazy("getisax"); |
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4720 if (func != NULL) { |
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4721 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); |
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4722 } |
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4723 |
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|
4724 // meminfo |
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|
4725 func = resolve_symbol_lazy("meminfo"); |
0 | 4726 if (func != NULL) { |
4727 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); | |
4728 } | |
4729 } | |
4730 | |
641
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4731 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { |
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4732 assert(_getisax != NULL, "_getisax not set"); |
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4733 return _getisax(array, n); |
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4734 } |
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4735 |
0 | 4736 // Symbol doesn't exist in Solaris 8 pset.h |
4737 #ifndef PS_MYID | |
4738 #define PS_MYID -3 | |
4739 #endif | |
4740 | |
4741 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); | |
4742 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); | |
4743 static pset_getloadavg_type pset_getloadavg_ptr = NULL; | |
4744 | |
4745 void init_pset_getloadavg_ptr(void) { | |
4746 pset_getloadavg_ptr = | |
4747 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); | |
4748 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { | |
4749 warning("pset_getloadavg function not found"); | |
4750 } | |
4751 } | |
4752 | |
4753 int os::Solaris::_dev_zero_fd = -1; | |
4754 | |
4755 // this is called _before_ the global arguments have been parsed | |
4756 void os::init(void) { | |
4757 _initial_pid = getpid(); | |
4758 | |
4759 max_hrtime = first_hrtime = gethrtime(); | |
4760 | |
4761 init_random(1234567); | |
4762 | |
4763 page_size = sysconf(_SC_PAGESIZE); | |
4764 if (page_size == -1) | |
4765 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); | |
4766 init_page_sizes((size_t) page_size); | |
4767 | |
4768 Solaris::initialize_system_info(); | |
4769 | |
641
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4770 // Initialize misc. symbols as soon as possible, so we can use them |
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4771 // if we need them. |
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4772 Solaris::misc_sym_init(); |
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4773 |
0 | 4774 int fd = open("/dev/zero", O_RDWR); |
4775 if (fd < 0) { | |
4776 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); | |
4777 } else { | |
4778 Solaris::set_dev_zero_fd(fd); | |
4779 | |
4780 // Close on exec, child won't inherit. | |
4781 fcntl(fd, F_SETFD, FD_CLOEXEC); | |
4782 } | |
4783 | |
4784 clock_tics_per_sec = CLK_TCK; | |
4785 | |
4786 // check if dladdr1() exists; dladdr1 can provide more information than | |
4787 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 | |
4788 // and is available on linker patches for 5.7 and 5.8. | |
4789 // libdl.so must have been loaded, this call is just an entry lookup | |
4790 void * hdl = dlopen("libdl.so", RTLD_NOW); | |
4791 if (hdl) | |
4792 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); | |
4793 | |
4794 // (Solaris only) this switches to calls that actually do locking. | |
4795 ThreadCritical::initialize(); | |
4796 | |
4797 main_thread = thr_self(); | |
4798 | |
4799 // Constant minimum stack size allowed. It must be at least | |
4800 // the minimum of what the OS supports (thr_min_stack()), and | |
4801 // enough to allow the thread to get to user bytecode execution. | |
4802 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); | |
4803 // If the pagesize of the VM is greater than 8K determine the appropriate | |
4804 // number of initial guard pages. The user can change this with the | |
4805 // command line arguments, if needed. | |
4806 if (vm_page_size() > 8*K) { | |
4807 StackYellowPages = 1; | |
4808 StackRedPages = 1; | |
4809 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); | |
4810 } | |
4811 } | |
4812 | |
4813 // To install functions for atexit system call | |
4814 extern "C" { | |
4815 static void perfMemory_exit_helper() { | |
4816 perfMemory_exit(); | |
4817 } | |
4818 } | |
4819 | |
4820 // this is called _after_ the global arguments have been parsed | |
4821 jint os::init_2(void) { | |
4822 // try to enable extended file IO ASAP, see 6431278 | |
4823 os::Solaris::try_enable_extended_io(); | |
4824 | |
4825 // Allocate a single page and mark it as readable for safepoint polling. Also | |
4826 // use this first mmap call to check support for MAP_ALIGN. | |
4827 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, | |
4828 page_size, | |
4829 MAP_PRIVATE | MAP_ALIGN, | |
4830 PROT_READ); | |
4831 if (polling_page == NULL) { | |
4832 has_map_align = false; | |
4833 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, | |
4834 PROT_READ); | |
4835 } | |
4836 | |
4837 os::set_polling_page(polling_page); | |
4838 | |
4839 #ifndef PRODUCT | |
4840 if( Verbose && PrintMiscellaneous ) | |
4841 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
4842 #endif | |
4843 | |
4844 if (!UseMembar) { | |
4845 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); | |
4846 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); | |
4847 os::set_memory_serialize_page( mem_serialize_page ); | |
4848 | |
4849 #ifndef PRODUCT | |
4850 if(Verbose && PrintMiscellaneous) | |
4851 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
4852 #endif | |
4853 } | |
4854 | |
4855 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); | |
4856 | |
4857 // Check minimum allowable stack size for thread creation and to initialize | |
4858 // the java system classes, including StackOverflowError - depends on page | |
4859 // size. Add a page for compiler2 recursion in main thread. | |
4860 // Add in BytesPerWord times page size to account for VM stack during | |
4861 // class initialization depending on 32 or 64 bit VM. | |
4862 guarantee((Solaris::min_stack_allowed >= | |
4863 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord | |
4864 COMPILER2_PRESENT(+1)) * page_size), | |
4865 "need to increase Solaris::min_stack_allowed on this platform"); | |
4866 | |
4867 size_t threadStackSizeInBytes = ThreadStackSize * K; | |
4868 if (threadStackSizeInBytes != 0 && | |
4869 threadStackSizeInBytes < Solaris::min_stack_allowed) { | |
4870 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", | |
4871 Solaris::min_stack_allowed/K); | |
4872 return JNI_ERR; | |
4873 } | |
4874 | |
4875 // For 64kbps there will be a 64kb page size, which makes | |
4876 // the usable default stack size quite a bit less. Increase the | |
4877 // stack for 64kb (or any > than 8kb) pages, this increases | |
4878 // virtual memory fragmentation (since we're not creating the | |
4879 // stack on a power of 2 boundary. The real fix for this | |
4880 // should be to fix the guard page mechanism. | |
4881 | |
4882 if (vm_page_size() > 8*K) { | |
4883 threadStackSizeInBytes = (threadStackSizeInBytes != 0) | |
4884 ? threadStackSizeInBytes + | |
4885 ((StackYellowPages + StackRedPages) * vm_page_size()) | |
4886 : 0; | |
4887 ThreadStackSize = threadStackSizeInBytes/K; | |
4888 } | |
4889 | |
4890 // Make the stack size a multiple of the page size so that | |
4891 // the yellow/red zones can be guarded. | |
4892 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
4893 vm_page_size())); | |
4894 | |
4895 Solaris::libthread_init(); | |
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4896 |
0 | 4897 if (UseNUMA) { |
462
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4898 if (!Solaris::liblgrp_init()) { |
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4899 UseNUMA = false; |
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4900 } else { |
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4901 size_t lgrp_limit = os::numa_get_groups_num(); |
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4902 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit); |
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4903 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); |
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4904 FREE_C_HEAP_ARRAY(int, lgrp_ids); |
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4905 if (lgrp_num < 2) { |
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4906 // There's only one locality group, disable NUMA. |
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4907 UseNUMA = false; |
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4908 } |
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4909 } |
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4910 if (!UseNUMA && ForceNUMA) { |
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4911 UseNUMA = true; |
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4912 } |
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4913 } |
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4914 |
0 | 4915 Solaris::signal_sets_init(); |
4916 Solaris::init_signal_mem(); | |
4917 Solaris::install_signal_handlers(); | |
4918 | |
4919 if (libjsigversion < JSIG_VERSION_1_4_1) { | |
4920 Maxlibjsigsigs = OLDMAXSIGNUM; | |
4921 } | |
4922 | |
4923 // initialize synchronization primitives to use either thread or | |
4924 // lwp synchronization (controlled by UseLWPSynchronization) | |
4925 Solaris::synchronization_init(); | |
4926 | |
4927 if (MaxFDLimit) { | |
4928 // set the number of file descriptors to max. print out error | |
4929 // if getrlimit/setrlimit fails but continue regardless. | |
4930 struct rlimit nbr_files; | |
4931 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
4932 if (status != 0) { | |
4933 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
4934 perror("os::init_2 getrlimit failed"); | |
4935 } else { | |
4936 nbr_files.rlim_cur = nbr_files.rlim_max; | |
4937 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
4938 if (status != 0) { | |
4939 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
4940 perror("os::init_2 setrlimit failed"); | |
4941 } | |
4942 } | |
4943 } | |
4944 | |
4945 // Initialize HPI. | |
4946 jint hpi_result = hpi::initialize(); | |
4947 if (hpi_result != JNI_OK) { | |
4948 tty->print_cr("There was an error trying to initialize the HPI library."); | |
4949 return hpi_result; | |
4950 } | |
4951 | |
4952 // Calculate theoretical max. size of Threads to guard gainst | |
4953 // artifical out-of-memory situations, where all available address- | |
4954 // space has been reserved by thread stacks. Default stack size is 1Mb. | |
4955 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? | |
4956 JavaThread::stack_size_at_create() : (1*K*K); | |
4957 assert(pre_thread_stack_size != 0, "Must have a stack"); | |
4958 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when | |
4959 // we should start doing Virtual Memory banging. Currently when the threads will | |
4960 // have used all but 200Mb of space. | |
4961 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); | |
4962 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; | |
4963 | |
4964 // at-exit methods are called in the reverse order of their registration. | |
4965 // In Solaris 7 and earlier, atexit functions are called on return from | |
4966 // main or as a result of a call to exit(3C). There can be only 32 of | |
4967 // these functions registered and atexit() does not set errno. In Solaris | |
4968 // 8 and later, there is no limit to the number of functions registered | |
4969 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit | |
4970 // functions are called upon dlclose(3DL) in addition to return from main | |
4971 // and exit(3C). | |
4972 | |
4973 if (PerfAllowAtExitRegistration) { | |
4974 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
4975 // atexit functions can be delayed until process exit time, which | |
4976 // can be problematic for embedded VM situations. Embedded VMs should | |
4977 // call DestroyJavaVM() to assure that VM resources are released. | |
4978 | |
4979 // note: perfMemory_exit_helper atexit function may be removed in | |
4980 // the future if the appropriate cleanup code can be added to the | |
4981 // VM_Exit VMOperation's doit method. | |
4982 if (atexit(perfMemory_exit_helper) != 0) { | |
4983 warning("os::init2 atexit(perfMemory_exit_helper) failed"); | |
4984 } | |
4985 } | |
4986 | |
4987 // Init pset_loadavg function pointer | |
4988 init_pset_getloadavg_ptr(); | |
4989 | |
4990 return JNI_OK; | |
4991 } | |
4992 | |
4993 | |
4994 // Mark the polling page as unreadable | |
4995 void os::make_polling_page_unreadable(void) { | |
4996 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) | |
4997 fatal("Could not disable polling page"); | |
4998 }; | |
4999 | |
5000 // Mark the polling page as readable | |
5001 void os::make_polling_page_readable(void) { | |
5002 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) | |
5003 fatal("Could not enable polling page"); | |
5004 }; | |
5005 | |
5006 // OS interface. | |
5007 | |
5008 int os::stat(const char *path, struct stat *sbuf) { | |
5009 char pathbuf[MAX_PATH]; | |
5010 if (strlen(path) > MAX_PATH - 1) { | |
5011 errno = ENAMETOOLONG; | |
5012 return -1; | |
5013 } | |
5014 hpi::native_path(strcpy(pathbuf, path)); | |
5015 return ::stat(pathbuf, sbuf); | |
5016 } | |
5017 | |
5018 | |
5019 bool os::check_heap(bool force) { return true; } | |
5020 | |
5021 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); | |
5022 static vsnprintf_t sol_vsnprintf = NULL; | |
5023 | |
5024 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { | |
5025 if (!sol_vsnprintf) { | |
5026 //search for the named symbol in the objects that were loaded after libjvm | |
5027 void* where = RTLD_NEXT; | |
5028 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) | |
5029 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); | |
5030 if (!sol_vsnprintf){ | |
5031 //search for the named symbol in the objects that were loaded before libjvm | |
5032 where = RTLD_DEFAULT; | |
5033 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) | |
5034 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); | |
5035 assert(sol_vsnprintf != NULL, "vsnprintf not found"); | |
5036 } | |
5037 } | |
5038 return (*sol_vsnprintf)(buf, count, fmt, argptr); | |
5039 } | |
5040 | |
5041 | |
5042 // Is a (classpath) directory empty? | |
5043 bool os::dir_is_empty(const char* path) { | |
5044 DIR *dir = NULL; | |
5045 struct dirent *ptr; | |
5046 | |
5047 dir = opendir(path); | |
5048 if (dir == NULL) return true; | |
5049 | |
5050 /* Scan the directory */ | |
5051 bool result = true; | |
5052 char buf[sizeof(struct dirent) + MAX_PATH]; | |
5053 struct dirent *dbuf = (struct dirent *) buf; | |
5054 while (result && (ptr = readdir(dir, dbuf)) != NULL) { | |
5055 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
5056 result = false; | |
5057 } | |
5058 } | |
5059 closedir(dir); | |
5060 return result; | |
5061 } | |
5062 | |
5063 // create binary file, rewriting existing file if required | |
5064 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
5065 int oflags = O_WRONLY | O_CREAT; | |
5066 if (!rewrite_existing) { | |
5067 oflags |= O_EXCL; | |
5068 } | |
5069 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
5070 } | |
5071 | |
5072 // return current position of file pointer | |
5073 jlong os::current_file_offset(int fd) { | |
5074 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
5075 } | |
5076 | |
5077 // move file pointer to the specified offset | |
5078 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
5079 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
5080 } | |
5081 | |
5082 // Map a block of memory. | |
5083 char* os::map_memory(int fd, const char* file_name, size_t file_offset, | |
5084 char *addr, size_t bytes, bool read_only, | |
5085 bool allow_exec) { | |
5086 int prot; | |
5087 int flags; | |
5088 | |
5089 if (read_only) { | |
5090 prot = PROT_READ; | |
5091 flags = MAP_SHARED; | |
5092 } else { | |
5093 prot = PROT_READ | PROT_WRITE; | |
5094 flags = MAP_PRIVATE; | |
5095 } | |
5096 | |
5097 if (allow_exec) { | |
5098 prot |= PROT_EXEC; | |
5099 } | |
5100 | |
5101 if (addr != NULL) { | |
5102 flags |= MAP_FIXED; | |
5103 } | |
5104 | |
5105 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
5106 fd, file_offset); | |
5107 if (mapped_address == MAP_FAILED) { | |
5108 return NULL; | |
5109 } | |
5110 return mapped_address; | |
5111 } | |
5112 | |
5113 | |
5114 // Remap a block of memory. | |
5115 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, | |
5116 char *addr, size_t bytes, bool read_only, | |
5117 bool allow_exec) { | |
5118 // same as map_memory() on this OS | |
5119 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
5120 allow_exec); | |
5121 } | |
5122 | |
5123 | |
5124 // Unmap a block of memory. | |
5125 bool os::unmap_memory(char* addr, size_t bytes) { | |
5126 return munmap(addr, bytes) == 0; | |
5127 } | |
5128 | |
5129 void os::pause() { | |
5130 char filename[MAX_PATH]; | |
5131 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
5132 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
5133 } else { | |
5134 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
5135 } | |
5136 | |
5137 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
5138 if (fd != -1) { | |
5139 struct stat buf; | |
5140 close(fd); | |
5141 while (::stat(filename, &buf) == 0) { | |
5142 (void)::poll(NULL, 0, 100); | |
5143 } | |
5144 } else { | |
5145 jio_fprintf(stderr, | |
5146 "Could not open pause file '%s', continuing immediately.\n", filename); | |
5147 } | |
5148 } | |
5149 | |
5150 #ifndef PRODUCT | |
5151 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS | |
5152 // Turn this on if you need to trace synch operations. | |
5153 // Set RECORD_SYNCH_LIMIT to a large-enough value, | |
5154 // and call record_synch_enable and record_synch_disable | |
5155 // around the computation of interest. | |
5156 | |
5157 void record_synch(char* name, bool returning); // defined below | |
5158 | |
5159 class RecordSynch { | |
5160 char* _name; | |
5161 public: | |
5162 RecordSynch(char* name) :_name(name) | |
5163 { record_synch(_name, false); } | |
5164 ~RecordSynch() { record_synch(_name, true); } | |
5165 }; | |
5166 | |
5167 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \ | |
5168 extern "C" ret name params { \ | |
5169 typedef ret name##_t params; \ | |
5170 static name##_t* implem = NULL; \ | |
5171 static int callcount = 0; \ | |
5172 if (implem == NULL) { \ | |
5173 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ | |
5174 if (implem == NULL) fatal(dlerror()); \ | |
5175 } \ | |
5176 ++callcount; \ | |
5177 RecordSynch _rs(#name); \ | |
5178 inner; \ | |
5179 return implem args; \ | |
5180 } | |
5181 // in dbx, examine callcounts this way: | |
5182 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done | |
5183 | |
5184 #define CHECK_POINTER_OK(p) \ | |
5185 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) | |
5186 #define CHECK_MU \ | |
5187 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); | |
5188 #define CHECK_CV \ | |
5189 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); | |
5190 #define CHECK_P(p) \ | |
5191 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); | |
5192 | |
5193 #define CHECK_MUTEX(mutex_op) \ | |
5194 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); | |
5195 | |
5196 CHECK_MUTEX( mutex_lock) | |
5197 CHECK_MUTEX( _mutex_lock) | |
5198 CHECK_MUTEX( mutex_unlock) | |
5199 CHECK_MUTEX(_mutex_unlock) | |
5200 CHECK_MUTEX( mutex_trylock) | |
5201 CHECK_MUTEX(_mutex_trylock) | |
5202 | |
5203 #define CHECK_COND(cond_op) \ | |
5204 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); | |
5205 | |
5206 CHECK_COND( cond_wait); | |
5207 CHECK_COND(_cond_wait); | |
5208 CHECK_COND(_cond_wait_cancel); | |
5209 | |
5210 #define CHECK_COND2(cond_op) \ | |
5211 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); | |
5212 | |
5213 CHECK_COND2( cond_timedwait); | |
5214 CHECK_COND2(_cond_timedwait); | |
5215 CHECK_COND2(_cond_timedwait_cancel); | |
5216 | |
5217 // do the _lwp_* versions too | |
5218 #define mutex_t lwp_mutex_t | |
5219 #define cond_t lwp_cond_t | |
5220 CHECK_MUTEX( _lwp_mutex_lock) | |
5221 CHECK_MUTEX( _lwp_mutex_unlock) | |
5222 CHECK_MUTEX( _lwp_mutex_trylock) | |
5223 CHECK_MUTEX( __lwp_mutex_lock) | |
5224 CHECK_MUTEX( __lwp_mutex_unlock) | |
5225 CHECK_MUTEX( __lwp_mutex_trylock) | |
5226 CHECK_MUTEX(___lwp_mutex_lock) | |
5227 CHECK_MUTEX(___lwp_mutex_unlock) | |
5228 | |
5229 CHECK_COND( _lwp_cond_wait); | |
5230 CHECK_COND( __lwp_cond_wait); | |
5231 CHECK_COND(___lwp_cond_wait); | |
5232 | |
5233 CHECK_COND2( _lwp_cond_timedwait); | |
5234 CHECK_COND2( __lwp_cond_timedwait); | |
5235 #undef mutex_t | |
5236 #undef cond_t | |
5237 | |
5238 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); | |
5239 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); | |
5240 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); | |
5241 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); | |
5242 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); | |
5243 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); | |
5244 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); | |
5245 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); | |
5246 | |
5247 | |
5248 // recording machinery: | |
5249 | |
5250 enum { RECORD_SYNCH_LIMIT = 200 }; | |
5251 char* record_synch_name[RECORD_SYNCH_LIMIT]; | |
5252 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; | |
5253 bool record_synch_returning[RECORD_SYNCH_LIMIT]; | |
5254 thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; | |
5255 int record_synch_count = 0; | |
5256 bool record_synch_enabled = false; | |
5257 | |
5258 // in dbx, examine recorded data this way: | |
5259 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done | |
5260 | |
5261 void record_synch(char* name, bool returning) { | |
5262 if (record_synch_enabled) { | |
5263 if (record_synch_count < RECORD_SYNCH_LIMIT) { | |
5264 record_synch_name[record_synch_count] = name; | |
5265 record_synch_returning[record_synch_count] = returning; | |
5266 record_synch_thread[record_synch_count] = thr_self(); | |
5267 record_synch_arg0ptr[record_synch_count] = &name; | |
5268 record_synch_count++; | |
5269 } | |
5270 // put more checking code here: | |
5271 // ... | |
5272 } | |
5273 } | |
5274 | |
5275 void record_synch_enable() { | |
5276 // start collecting trace data, if not already doing so | |
5277 if (!record_synch_enabled) record_synch_count = 0; | |
5278 record_synch_enabled = true; | |
5279 } | |
5280 | |
5281 void record_synch_disable() { | |
5282 // stop collecting trace data | |
5283 record_synch_enabled = false; | |
5284 } | |
5285 | |
5286 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS | |
5287 #endif // PRODUCT | |
5288 | |
5289 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); | |
5290 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - | |
5291 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); | |
5292 | |
5293 | |
5294 // JVMTI & JVM monitoring and management support | |
5295 // The thread_cpu_time() and current_thread_cpu_time() are only | |
5296 // supported if is_thread_cpu_time_supported() returns true. | |
5297 // They are not supported on Solaris T1. | |
5298 | |
5299 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
5300 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
5301 // of a thread. | |
5302 // | |
5303 // current_thread_cpu_time() and thread_cpu_time(Thread *) | |
5304 // returns the fast estimate available on the platform. | |
5305 | |
5306 // hrtime_t gethrvtime() return value includes | |
5307 // user time but does not include system time | |
5308 jlong os::current_thread_cpu_time() { | |
5309 return (jlong) gethrvtime(); | |
5310 } | |
5311 | |
5312 jlong os::thread_cpu_time(Thread *thread) { | |
5313 // return user level CPU time only to be consistent with | |
5314 // what current_thread_cpu_time returns. | |
5315 // thread_cpu_time_info() must be changed if this changes | |
5316 return os::thread_cpu_time(thread, false /* user time only */); | |
5317 } | |
5318 | |
5319 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
5320 if (user_sys_cpu_time) { | |
5321 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
5322 } else { | |
5323 return os::current_thread_cpu_time(); | |
5324 } | |
5325 } | |
5326 | |
5327 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
5328 char proc_name[64]; | |
5329 int count; | |
5330 prusage_t prusage; | |
5331 jlong lwp_time; | |
5332 int fd; | |
5333 | |
5334 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", | |
5335 getpid(), | |
5336 thread->osthread()->lwp_id()); | |
5337 fd = open(proc_name, O_RDONLY); | |
5338 if ( fd == -1 ) return -1; | |
5339 | |
5340 do { | |
5341 count = pread(fd, | |
5342 (void *)&prusage.pr_utime, | |
5343 thr_time_size, | |
5344 thr_time_off); | |
5345 } while (count < 0 && errno == EINTR); | |
5346 close(fd); | |
5347 if ( count < 0 ) return -1; | |
5348 | |
5349 if (user_sys_cpu_time) { | |
5350 // user + system CPU time | |
5351 lwp_time = (((jlong)prusage.pr_stime.tv_sec + | |
5352 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + | |
5353 (jlong)prusage.pr_stime.tv_nsec + | |
5354 (jlong)prusage.pr_utime.tv_nsec; | |
5355 } else { | |
5356 // user level CPU time only | |
5357 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + | |
5358 (jlong)prusage.pr_utime.tv_nsec; | |
5359 } | |
5360 | |
5361 return(lwp_time); | |
5362 } | |
5363 | |
5364 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
5365 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
5366 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
5367 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
5368 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned | |
5369 } | |
5370 | |
5371 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
5372 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
5373 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
5374 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
5375 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned | |
5376 } | |
5377 | |
5378 bool os::is_thread_cpu_time_supported() { | |
5379 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { | |
5380 return true; | |
5381 } else { | |
5382 return false; | |
5383 } | |
5384 } | |
5385 | |
5386 // System loadavg support. Returns -1 if load average cannot be obtained. | |
5387 // Return the load average for our processor set if the primitive exists | |
5388 // (Solaris 9 and later). Otherwise just return system wide loadavg. | |
5389 int os::loadavg(double loadavg[], int nelem) { | |
5390 if (pset_getloadavg_ptr != NULL) { | |
5391 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); | |
5392 } else { | |
5393 return ::getloadavg(loadavg, nelem); | |
5394 } | |
5395 } | |
5396 | |
5397 //--------------------------------------------------------------------------------- | |
5398 #ifndef PRODUCT | |
5399 | |
5400 static address same_page(address x, address y) { | |
5401 intptr_t page_bits = -os::vm_page_size(); | |
5402 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) | |
5403 return x; | |
5404 else if (x > y) | |
5405 return (address)(intptr_t(y) | ~page_bits) + 1; | |
5406 else | |
5407 return (address)(intptr_t(y) & page_bits); | |
5408 } | |
5409 | |
5410 bool os::find(address addr) { | |
5411 Dl_info dlinfo; | |
5412 memset(&dlinfo, 0, sizeof(dlinfo)); | |
5413 if (dladdr(addr, &dlinfo)) { | |
5414 #ifdef _LP64 | |
5415 tty->print("0x%016lx: ", addr); | |
5416 #else | |
5417 tty->print("0x%08x: ", addr); | |
5418 #endif | |
5419 if (dlinfo.dli_sname != NULL) | |
5420 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); | |
5421 else if (dlinfo.dli_fname) | |
5422 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); | |
5423 else | |
5424 tty->print("<absolute address>"); | |
5425 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); | |
5426 #ifdef _LP64 | |
5427 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); | |
5428 #else | |
5429 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); | |
5430 #endif | |
5431 tty->cr(); | |
5432 | |
5433 if (Verbose) { | |
5434 // decode some bytes around the PC | |
5435 address begin = same_page(addr-40, addr); | |
5436 address end = same_page(addr+40, addr); | |
5437 address lowest = (address) dlinfo.dli_sname; | |
5438 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
5439 if (begin < lowest) begin = lowest; | |
5440 Dl_info dlinfo2; | |
5441 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr | |
5442 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) | |
5443 end = (address) dlinfo2.dli_saddr; | |
5444 Disassembler::decode(begin, end); | |
5445 } | |
5446 return true; | |
5447 } | |
5448 return false; | |
5449 } | |
5450 | |
5451 #endif | |
5452 | |
5453 | |
5454 // Following function has been added to support HotSparc's libjvm.so running | |
5455 // under Solaris production JDK 1.2.2 / 1.3.0. These came from | |
5456 // src/solaris/hpi/native_threads in the EVM codebase. | |
5457 // | |
5458 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release | |
5459 // libraries and should thus be removed. We will leave it behind for a while | |
5460 // until we no longer want to able to run on top of 1.3.0 Solaris production | |
5461 // JDK. See 4341971. | |
5462 | |
5463 #define STACK_SLACK 0x800 | |
5464 | |
5465 extern "C" { | |
5466 intptr_t sysThreadAvailableStackWithSlack() { | |
5467 stack_t st; | |
5468 intptr_t retval, stack_top; | |
5469 retval = thr_stksegment(&st); | |
5470 assert(retval == 0, "incorrect return value from thr_stksegment"); | |
5471 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); | |
5472 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); | |
5473 stack_top=(intptr_t)st.ss_sp-st.ss_size; | |
5474 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); | |
5475 } | |
5476 } | |
5477 | |
5478 // Just to get the Kernel build to link on solaris for testing. | |
5479 | |
5480 extern "C" { | |
5481 class ASGCT_CallTrace; | |
5482 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) | |
5483 KERNEL_RETURN; | |
5484 } | |
5485 | |
5486 | |
5487 // ObjectMonitor park-unpark infrastructure ... | |
5488 // | |
5489 // We implement Solaris and Linux PlatformEvents with the | |
5490 // obvious condvar-mutex-flag triple. | |
5491 // Another alternative that works quite well is pipes: | |
5492 // Each PlatformEvent consists of a pipe-pair. | |
5493 // The thread associated with the PlatformEvent | |
5494 // calls park(), which reads from the input end of the pipe. | |
5495 // Unpark() writes into the other end of the pipe. | |
5496 // The write-side of the pipe must be set NDELAY. | |
5497 // Unfortunately pipes consume a large # of handles. | |
5498 // Native solaris lwp_park() and lwp_unpark() work nicely, too. | |
5499 // Using pipes for the 1st few threads might be workable, however. | |
5500 // | |
5501 // park() is permitted to return spuriously. | |
5502 // Callers of park() should wrap the call to park() in | |
5503 // an appropriate loop. A litmus test for the correct | |
5504 // usage of park is the following: if park() were modified | |
5505 // to immediately return 0 your code should still work, | |
5506 // albeit degenerating to a spin loop. | |
5507 // | |
5508 // An interesting optimization for park() is to use a trylock() | |
5509 // to attempt to acquire the mutex. If the trylock() fails | |
5510 // then we know that a concurrent unpark() operation is in-progress. | |
5511 // in that case the park() code could simply set _count to 0 | |
5512 // and return immediately. The subsequent park() operation *might* | |
5513 // return immediately. That's harmless as the caller of park() is | |
5514 // expected to loop. By using trylock() we will have avoided a | |
5515 // avoided a context switch caused by contention on the per-thread mutex. | |
5516 // | |
5517 // TODO-FIXME: | |
5518 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the | |
5519 // objectmonitor implementation. | |
5520 // 2. Collapse the JSR166 parker event, and the | |
5521 // objectmonitor ParkEvent into a single "Event" construct. | |
5522 // 3. In park() and unpark() add: | |
5523 // assert (Thread::current() == AssociatedWith). | |
5524 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. | |
5525 // 1-out-of-N park() operations will return immediately. | |
5526 // | |
5527 // _Event transitions in park() | |
5528 // -1 => -1 : illegal | |
5529 // 1 => 0 : pass - return immediately | |
5530 // 0 => -1 : block | |
5531 // | |
5532 // _Event serves as a restricted-range semaphore. | |
5533 // | |
5534 // Another possible encoding of _Event would be with | |
5535 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits. | |
5536 // | |
5537 // TODO-FIXME: add DTRACE probes for: | |
5538 // 1. Tx parks | |
5539 // 2. Ty unparks Tx | |
5540 // 3. Tx resumes from park | |
5541 | |
5542 | |
5543 // value determined through experimentation | |
5544 #define ROUNDINGFIX 11 | |
5545 | |
5546 // utility to compute the abstime argument to timedwait. | |
5547 // TODO-FIXME: switch from compute_abstime() to unpackTime(). | |
5548 | |
5549 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { | |
5550 // millis is the relative timeout time | |
5551 // abstime will be the absolute timeout time | |
5552 if (millis < 0) millis = 0; | |
5553 struct timeval now; | |
5554 int status = gettimeofday(&now, NULL); | |
5555 assert(status == 0, "gettimeofday"); | |
5556 jlong seconds = millis / 1000; | |
5557 jlong max_wait_period; | |
5558 | |
5559 if (UseLWPSynchronization) { | |
5560 // forward port of fix for 4275818 (not sleeping long enough) | |
5561 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where | |
5562 // _lwp_cond_timedwait() used a round_down algorithm rather | |
5563 // than a round_up. For millis less than our roundfactor | |
5564 // it rounded down to 0 which doesn't meet the spec. | |
5565 // For millis > roundfactor we may return a bit sooner, but | |
5566 // since we can not accurately identify the patch level and | |
5567 // this has already been fixed in Solaris 9 and 8 we will | |
5568 // leave it alone rather than always rounding down. | |
5569 | |
5570 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; | |
5571 // It appears that when we go directly through Solaris _lwp_cond_timedwait() | |
5572 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 | |
5573 max_wait_period = 21000000; | |
5574 } else { | |
5575 max_wait_period = 50000000; | |
5576 } | |
5577 millis %= 1000; | |
5578 if (seconds > max_wait_period) { // see man cond_timedwait(3T) | |
5579 seconds = max_wait_period; | |
5580 } | |
5581 abstime->tv_sec = now.tv_sec + seconds; | |
5582 long usec = now.tv_usec + millis * 1000; | |
5583 if (usec >= 1000000) { | |
5584 abstime->tv_sec += 1; | |
5585 usec -= 1000000; | |
5586 } | |
5587 abstime->tv_nsec = usec * 1000; | |
5588 return abstime; | |
5589 } | |
5590 | |
5591 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
5592 // Conceptually TryPark() should be equivalent to park(0). | |
5593 | |
5594 int os::PlatformEvent::TryPark() { | |
5595 for (;;) { | |
5596 const int v = _Event ; | |
5597 guarantee ((v == 0) || (v == 1), "invariant") ; | |
5598 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
5599 } | |
5600 } | |
5601 | |
5602 void os::PlatformEvent::park() { // AKA: down() | |
5603 // Invariant: Only the thread associated with the Event/PlatformEvent | |
5604 // may call park(). | |
5605 int v ; | |
5606 for (;;) { | |
5607 v = _Event ; | |
5608 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
5609 } | |
5610 guarantee (v >= 0, "invariant") ; | |
5611 if (v == 0) { | |
5612 // Do this the hard way by blocking ... | |
5613 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
5614 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. | |
5615 // Only for SPARC >= V8PlusA | |
5616 #if defined(__sparc) && defined(COMPILER2) | |
5617 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
5618 #endif | |
5619 int status = os::Solaris::mutex_lock(_mutex); | |
5620 assert_status(status == 0, status, "mutex_lock"); | |
5621 guarantee (_nParked == 0, "invariant") ; | |
5622 ++ _nParked ; | |
5623 while (_Event < 0) { | |
5624 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
5625 // Treat this the same as if the wait was interrupted | |
5626 // With usr/lib/lwp going to kernel, always handle ETIME | |
5627 status = os::Solaris::cond_wait(_cond, _mutex); | |
5628 if (status == ETIME) status = EINTR ; | |
5629 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
5630 } | |
5631 -- _nParked ; | |
5632 _Event = 0 ; | |
5633 status = os::Solaris::mutex_unlock(_mutex); | |
5634 assert_status(status == 0, status, "mutex_unlock"); | |
5635 } | |
5636 } | |
5637 | |
5638 int os::PlatformEvent::park(jlong millis) { | |
5639 guarantee (_nParked == 0, "invariant") ; | |
5640 int v ; | |
5641 for (;;) { | |
5642 v = _Event ; | |
5643 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
5644 } | |
5645 guarantee (v >= 0, "invariant") ; | |
5646 if (v != 0) return OS_OK ; | |
5647 | |
5648 int ret = OS_TIMEOUT; | |
5649 timestruc_t abst; | |
5650 compute_abstime (&abst, millis); | |
5651 | |
5652 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
5653 // For Solaris SPARC set fprs.FEF=0 prior to parking. | |
5654 // Only for SPARC >= V8PlusA | |
5655 #if defined(__sparc) && defined(COMPILER2) | |
5656 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
5657 #endif | |
5658 int status = os::Solaris::mutex_lock(_mutex); | |
5659 assert_status(status == 0, status, "mutex_lock"); | |
5660 guarantee (_nParked == 0, "invariant") ; | |
5661 ++ _nParked ; | |
5662 while (_Event < 0) { | |
5663 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); | |
5664 assert_status(status == 0 || status == EINTR || | |
5665 status == ETIME || status == ETIMEDOUT, | |
5666 status, "cond_timedwait"); | |
5667 if (!FilterSpuriousWakeups) break ; // previous semantics | |
5668 if (status == ETIME || status == ETIMEDOUT) break ; | |
5669 // We consume and ignore EINTR and spurious wakeups. | |
5670 } | |
5671 -- _nParked ; | |
5672 if (_Event >= 0) ret = OS_OK ; | |
5673 _Event = 0 ; | |
5674 status = os::Solaris::mutex_unlock(_mutex); | |
5675 assert_status(status == 0, status, "mutex_unlock"); | |
5676 return ret; | |
5677 } | |
5678 | |
5679 void os::PlatformEvent::unpark() { | |
5680 int v, AnyWaiters; | |
5681 | |
5682 // Increment _Event. | |
5683 // Another acceptable implementation would be to simply swap 1 | |
5684 // into _Event: | |
5685 // if (Swap (&_Event, 1) < 0) { | |
5686 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; | |
5687 // if (AnyWaiters) cond_signal (_cond) ; | |
5688 // } | |
5689 | |
5690 for (;;) { | |
5691 v = _Event ; | |
5692 if (v > 0) { | |
5693 // The LD of _Event could have reordered or be satisfied | |
5694 // by a read-aside from this processor's write buffer. | |
5695 // To avoid problems execute a barrier and then | |
5696 // ratify the value. A degenerate CAS() would also work. | |
5697 // Viz., CAS (v+0, &_Event, v) == v). | |
5698 OrderAccess::fence() ; | |
5699 if (_Event == v) return ; | |
5700 continue ; | |
5701 } | |
5702 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; | |
5703 } | |
5704 | |
5705 // If the thread associated with the event was parked, wake it. | |
5706 if (v < 0) { | |
5707 int status ; | |
5708 // Wait for the thread assoc with the PlatformEvent to vacate. | |
5709 status = os::Solaris::mutex_lock(_mutex); | |
5710 assert_status(status == 0, status, "mutex_lock"); | |
5711 AnyWaiters = _nParked ; | |
5712 status = os::Solaris::mutex_unlock(_mutex); | |
5713 assert_status(status == 0, status, "mutex_unlock"); | |
5714 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; | |
5715 if (AnyWaiters != 0) { | |
5716 // We intentional signal *after* dropping the lock | |
5717 // to avoid a common class of futile wakeups. | |
5718 status = os::Solaris::cond_signal(_cond); | |
5719 assert_status(status == 0, status, "cond_signal"); | |
5720 } | |
5721 } | |
5722 } | |
5723 | |
5724 // JSR166 | |
5725 // ------------------------------------------------------- | |
5726 | |
5727 /* | |
5728 * The solaris and linux implementations of park/unpark are fairly | |
5729 * conservative for now, but can be improved. They currently use a | |
5730 * mutex/condvar pair, plus _counter. | |
5731 * Park decrements _counter if > 0, else does a condvar wait. Unpark | |
5732 * sets count to 1 and signals condvar. Only one thread ever waits | |
5733 * on the condvar. Contention seen when trying to park implies that someone | |
5734 * is unparking you, so don't wait. And spurious returns are fine, so there | |
5735 * is no need to track notifications. | |
5736 */ | |
5737 | |
5738 #define NANOSECS_PER_SEC 1000000000 | |
5739 #define NANOSECS_PER_MILLISEC 1000000 | |
5740 #define MAX_SECS 100000000 | |
5741 | |
5742 /* | |
5743 * This code is common to linux and solaris and will be moved to a | |
5744 * common place in dolphin. | |
5745 * | |
5746 * The passed in time value is either a relative time in nanoseconds | |
5747 * or an absolute time in milliseconds. Either way it has to be unpacked | |
5748 * into suitable seconds and nanoseconds components and stored in the | |
5749 * given timespec structure. | |
5750 * Given time is a 64-bit value and the time_t used in the timespec is only | |
5751 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
5752 * overflow if times way in the future are given. Further on Solaris versions | |
5753 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
5754 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
5755 * As it will be 28 years before "now + 100000000" will overflow we can | |
5756 * ignore overflow and just impose a hard-limit on seconds using the value | |
5757 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
5758 * years from "now". | |
5759 */ | |
5760 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
5761 assert (time > 0, "convertTime"); | |
5762 | |
5763 struct timeval now; | |
5764 int status = gettimeofday(&now, NULL); | |
5765 assert(status == 0, "gettimeofday"); | |
5766 | |
5767 time_t max_secs = now.tv_sec + MAX_SECS; | |
5768 | |
5769 if (isAbsolute) { | |
5770 jlong secs = time / 1000; | |
5771 if (secs > max_secs) { | |
5772 absTime->tv_sec = max_secs; | |
5773 } | |
5774 else { | |
5775 absTime->tv_sec = secs; | |
5776 } | |
5777 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; | |
5778 } | |
5779 else { | |
5780 jlong secs = time / NANOSECS_PER_SEC; | |
5781 if (secs >= MAX_SECS) { | |
5782 absTime->tv_sec = max_secs; | |
5783 absTime->tv_nsec = 0; | |
5784 } | |
5785 else { | |
5786 absTime->tv_sec = now.tv_sec + secs; | |
5787 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; | |
5788 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { | |
5789 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
5790 ++absTime->tv_sec; // note: this must be <= max_secs | |
5791 } | |
5792 } | |
5793 } | |
5794 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
5795 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
5796 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
5797 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
5798 } | |
5799 | |
5800 void Parker::park(bool isAbsolute, jlong time) { | |
5801 | |
5802 // Optional fast-path check: | |
5803 // Return immediately if a permit is available. | |
5804 if (_counter > 0) { | |
5805 _counter = 0 ; | |
5806 return ; | |
5807 } | |
5808 | |
5809 // Optional fast-exit: Check interrupt before trying to wait | |
5810 Thread* thread = Thread::current(); | |
5811 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
5812 JavaThread *jt = (JavaThread *)thread; | |
5813 if (Thread::is_interrupted(thread, false)) { | |
5814 return; | |
5815 } | |
5816 | |
5817 // First, demultiplex/decode time arguments | |
5818 timespec absTime; | |
5819 if (time < 0) { // don't wait at all | |
5820 return; | |
5821 } | |
5822 if (time > 0) { | |
5823 // Warning: this code might be exposed to the old Solaris time | |
5824 // round-down bugs. Grep "roundingFix" for details. | |
5825 unpackTime(&absTime, isAbsolute, time); | |
5826 } | |
5827 | |
5828 // Enter safepoint region | |
5829 // Beware of deadlocks such as 6317397. | |
5830 // The per-thread Parker:: _mutex is a classic leaf-lock. | |
5831 // In particular a thread must never block on the Threads_lock while | |
5832 // holding the Parker:: mutex. If safepoints are pending both the | |
5833 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
5834 ThreadBlockInVM tbivm(jt); | |
5835 | |
5836 // Don't wait if cannot get lock since interference arises from | |
5837 // unblocking. Also. check interrupt before trying wait | |
5838 if (Thread::is_interrupted(thread, false) || | |
5839 os::Solaris::mutex_trylock(_mutex) != 0) { | |
5840 return; | |
5841 } | |
5842 | |
5843 int status ; | |
5844 | |
5845 if (_counter > 0) { // no wait needed | |
5846 _counter = 0; | |
5847 status = os::Solaris::mutex_unlock(_mutex); | |
5848 assert (status == 0, "invariant") ; | |
5849 return; | |
5850 } | |
5851 | |
5852 #ifdef ASSERT | |
5853 // Don't catch signals while blocked; let the running threads have the signals. | |
5854 // (This allows a debugger to break into the running thread.) | |
5855 sigset_t oldsigs; | |
5856 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); | |
5857 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
5858 #endif | |
5859 | |
5860 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
5861 jt->set_suspend_equivalent(); | |
5862 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
5863 | |
5864 // Do this the hard way by blocking ... | |
5865 // See http://monaco.sfbay/detail.jsf?cr=5094058. | |
5866 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. | |
5867 // Only for SPARC >= V8PlusA | |
5868 #if defined(__sparc) && defined(COMPILER2) | |
5869 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } | |
5870 #endif | |
5871 | |
5872 if (time == 0) { | |
5873 status = os::Solaris::cond_wait (_cond, _mutex) ; | |
5874 } else { | |
5875 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); | |
5876 } | |
5877 // Note that an untimed cond_wait() can sometimes return ETIME on older | |
5878 // versions of the Solaris. | |
5879 assert_status(status == 0 || status == EINTR || | |
5880 status == ETIME || status == ETIMEDOUT, | |
5881 status, "cond_timedwait"); | |
5882 | |
5883 #ifdef ASSERT | |
5884 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); | |
5885 #endif | |
5886 _counter = 0 ; | |
5887 status = os::Solaris::mutex_unlock(_mutex); | |
5888 assert_status(status == 0, status, "mutex_unlock") ; | |
5889 | |
5890 // If externally suspended while waiting, re-suspend | |
5891 if (jt->handle_special_suspend_equivalent_condition()) { | |
5892 jt->java_suspend_self(); | |
5893 } | |
5894 | |
5895 } | |
5896 | |
5897 void Parker::unpark() { | |
5898 int s, status ; | |
5899 status = os::Solaris::mutex_lock (_mutex) ; | |
5900 assert (status == 0, "invariant") ; | |
5901 s = _counter; | |
5902 _counter = 1; | |
5903 status = os::Solaris::mutex_unlock (_mutex) ; | |
5904 assert (status == 0, "invariant") ; | |
5905 | |
5906 if (s < 1) { | |
5907 status = os::Solaris::cond_signal (_cond) ; | |
5908 assert (status == 0, "invariant") ; | |
5909 } | |
5910 } | |
5911 | |
5912 extern char** environ; | |
5913 | |
5914 // Run the specified command in a separate process. Return its exit value, | |
5915 // or -1 on failure (e.g. can't fork a new process). | |
5916 // Unlike system(), this function can be called from signal handler. It | |
5917 // doesn't block SIGINT et al. | |
5918 int os::fork_and_exec(char* cmd) { | |
5919 char * argv[4]; | |
5920 argv[0] = (char *)"sh"; | |
5921 argv[1] = (char *)"-c"; | |
5922 argv[2] = cmd; | |
5923 argv[3] = NULL; | |
5924 | |
5925 // fork is async-safe, fork1 is not so can't use in signal handler | |
5926 pid_t pid; | |
5927 Thread* t = ThreadLocalStorage::get_thread_slow(); | |
5928 if (t != NULL && t->is_inside_signal_handler()) { | |
5929 pid = fork(); | |
5930 } else { | |
5931 pid = fork1(); | |
5932 } | |
5933 | |
5934 if (pid < 0) { | |
5935 // fork failed | |
5936 warning("fork failed: %s", strerror(errno)); | |
5937 return -1; | |
5938 | |
5939 } else if (pid == 0) { | |
5940 // child process | |
5941 | |
5942 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris | |
5943 execve("/usr/bin/sh", argv, environ); | |
5944 | |
5945 // execve failed | |
5946 _exit(-1); | |
5947 | |
5948 } else { | |
5949 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
5950 // care about the actual exit code, for now. | |
5951 | |
5952 int status; | |
5953 | |
5954 // Wait for the child process to exit. This returns immediately if | |
5955 // the child has already exited. */ | |
5956 while (waitpid(pid, &status, 0) < 0) { | |
5957 switch (errno) { | |
5958 case ECHILD: return 0; | |
5959 case EINTR: break; | |
5960 default: return -1; | |
5961 } | |
5962 } | |
5963 | |
5964 if (WIFEXITED(status)) { | |
5965 // The child exited normally; get its exit code. | |
5966 return WEXITSTATUS(status); | |
5967 } else if (WIFSIGNALED(status)) { | |
5968 // The child exited because of a signal | |
5969 // The best value to return is 0x80 + signal number, | |
5970 // because that is what all Unix shells do, and because | |
5971 // it allows callers to distinguish between process exit and | |
5972 // process death by signal. | |
5973 return 0x80 + WTERMSIG(status); | |
5974 } else { | |
5975 // Unknown exit code; pass it through | |
5976 return status; | |
5977 } | |
5978 } | |
5979 } |