1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // no precompiled headers
26 #include "classfile/classLoader.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/icBuffer.hpp"
30 #include "code/vtableStubs.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvm_solaris.h"
35 #include "memory/allocation.inline.hpp"
36 #include "memory/filemap.hpp"
37 #include "mutex_solaris.inline.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "os_share_solaris.hpp"
40 #include "prims/jniFastGetField.hpp"
41 #include "prims/jvm.h"
42 #include "prims/jvm_misc.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/extendedPC.hpp"
45 #include "runtime/globals.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/mutexLocker.hpp"
50 #include "runtime/objectMonitor.hpp"
51 #include "runtime/osThread.hpp"
52 #include "runtime/perfMemory.hpp"
53 #include "runtime/sharedRuntime.hpp"
54 #include "runtime/statSampler.hpp"
55 #include "runtime/stubRoutines.hpp"
56 #include "runtime/thread.inline.hpp"
57 #include "runtime/threadCritical.hpp"
58 #include "runtime/timer.hpp"
59 #include "services/attachListener.hpp"
60 #include "services/memTracker.hpp"
61 #include "services/runtimeService.hpp"
62 #include "utilities/decoder.hpp"
63 #include "utilities/defaultStream.hpp"
64 #include "utilities/events.hpp"
65 #include "utilities/growableArray.hpp"
66 #include "utilities/vmError.hpp"
67
68 // put OS-includes here
69 # include <dlfcn.h>
70 # include <errno.h>
71 # include <exception>
72 # include <link.h>
73 # include <poll.h>
74 # include <pthread.h>
75 # include <pwd.h>
76 # include <schedctl.h>
77 # include <setjmp.h>
78 # include <signal.h>
79 # include <stdio.h>
80 # include <alloca.h>
81 # include <sys/filio.h>
82 # include <sys/ipc.h>
83 # include <sys/lwp.h>
84 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
85 # include <sys/mman.h>
86 # include <sys/processor.h>
87 # include <sys/procset.h>
88 # include <sys/pset.h>
89 # include <sys/resource.h>
90 # include <sys/shm.h>
91 # include <sys/socket.h>
92 # include <sys/stat.h>
93 # include <sys/systeminfo.h>
94 # include <sys/time.h>
95 # include <sys/times.h>
96 # include <sys/types.h>
97 # include <sys/wait.h>
98 # include <sys/utsname.h>
99 # include <thread.h>
100 # include <unistd.h>
101 # include <sys/priocntl.h>
102 # include <sys/rtpriocntl.h>
103 # include <sys/tspriocntl.h>
104 # include <sys/iapriocntl.h>
105 # include <sys/fxpriocntl.h>
106 # include <sys/loadavg.h>
107 # include <string.h>
108 # include <stdio.h>
109
110 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
111 # include <sys/procfs.h> // see comment in <sys/procfs.h>
112
113 #define MAX_PATH (2 * K)
114
115 // for timer info max values which include all bits
116 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
117
118
119 // Here are some liblgrp types from sys/lgrp_user.h to be able to
120 // compile on older systems without this header file.
121
122 #ifndef MADV_ACCESS_LWP
123 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
124 #endif
125 #ifndef MADV_ACCESS_MANY
126 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */
127 #endif
128
129 #ifndef LGRP_RSRC_CPU
130 # define LGRP_RSRC_CPU 0 /* CPU resources */
131 #endif
132 #ifndef LGRP_RSRC_MEM
133 # define LGRP_RSRC_MEM 1 /* memory resources */
134 #endif
135
136 // see thr_setprio(3T) for the basis of these numbers
137 #define MinimumPriority 0
138 #define NormalPriority 64
139 #define MaximumPriority 127
140
141 // Values for ThreadPriorityPolicy == 1
142 int prio_policy1[CriticalPriority+1] = {
143 -99999, 0, 16, 32, 48, 64,
144 80, 96, 112, 124, 127, 127 };
145
146 // System parameters used internally
147 static clock_t clock_tics_per_sec = 100;
148
149 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
150 static bool enabled_extended_FILE_stdio = false;
151
152 // For diagnostics to print a message once. see run_periodic_checks
153 static bool check_addr0_done = false;
154 static sigset_t check_signal_done;
155 static bool check_signals = true;
156
157 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
158 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
159
160 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
161
162
163 // "default" initializers for missing libc APIs
164 extern "C" {
165 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
166 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
167
168 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
169 static int lwp_cond_destroy(cond_t *cv) { return 0; }
170 }
171
172 // "default" initializers for pthread-based synchronization
173 extern "C" {
174 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
175 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
176 }
177
178 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time);
179
180 // Thread Local Storage
181 // This is common to all Solaris platforms so it is defined here,
182 // in this common file.
183 // The declarations are in the os_cpu threadLS*.hpp files.
184 //
185 // Static member initialization for TLS
186 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
187
188 #ifndef PRODUCT
189 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
190
191 int ThreadLocalStorage::_tcacheHit = 0;
192 int ThreadLocalStorage::_tcacheMiss = 0;
193
194 void ThreadLocalStorage::print_statistics() {
195 int total = _tcacheMiss+_tcacheHit;
196 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
197 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
198 }
199 #undef _PCT
200 #endif // PRODUCT
201
202 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
203 int index) {
204 Thread *thread = get_thread_slow();
205 if (thread != NULL) {
206 address sp = os::current_stack_pointer();
207 guarantee(thread->_stack_base == NULL ||
208 (sp <= thread->_stack_base &&
209 sp >= thread->_stack_base - thread->_stack_size) ||
210 is_error_reported(),
211 "sp must be inside of selected thread stack");
212
213 thread->set_self_raw_id(raw_id); // mark for quick retrieval
214 _get_thread_cache[ index ] = thread;
215 }
216 return thread;
217 }
218
219
220 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0};
221 #define NO_CACHED_THREAD ((Thread*)all_zero)
222
223 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
224
225 // Store the new value before updating the cache to prevent a race
226 // between get_thread_via_cache_slowly() and this store operation.
227 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
228
229 // Update thread cache with new thread if setting on thread create,
230 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
231 uintptr_t raw = pd_raw_thread_id();
232 int ix = pd_cache_index(raw);
233 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
234 }
235
236 void ThreadLocalStorage::pd_init() {
237 for (int i = 0; i < _pd_cache_size; i++) {
238 _get_thread_cache[i] = NO_CACHED_THREAD;
239 }
240 }
241
242 // Invalidate all the caches (happens to be the same as pd_init).
243 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
244
245 #undef NO_CACHED_THREAD
246
247 // END Thread Local Storage
248
249 static inline size_t adjust_stack_size(address base, size_t size) {
250 if ((ssize_t)size < 0) {
251 // 4759953: Compensate for ridiculous stack size.
252 size = max_intx;
253 }
254 if (size > (size_t)base) {
255 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
256 size = (size_t)base;
257 }
258 return size;
259 }
260
261 static inline stack_t get_stack_info() {
262 stack_t st;
263 int retval = thr_stksegment(&st);
264 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
265 assert(retval == 0, "incorrect return value from thr_stksegment");
266 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
267 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
268 return st;
269 }
270
271 address os::current_stack_base() {
272 int r = thr_main() ;
273 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
274 bool is_primordial_thread = r;
275
276 // Workaround 4352906, avoid calls to thr_stksegment by
277 // thr_main after the first one (it looks like we trash
278 // some data, causing the value for ss_sp to be incorrect).
279 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
280 stack_t st = get_stack_info();
281 if (is_primordial_thread) {
282 // cache initial value of stack base
283 os::Solaris::_main_stack_base = (address)st.ss_sp;
284 }
285 return (address)st.ss_sp;
286 } else {
287 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
288 return os::Solaris::_main_stack_base;
289 }
290 }
291
292 size_t os::current_stack_size() {
293 size_t size;
294
295 int r = thr_main() ;
296 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
297 if(!r) {
298 size = get_stack_info().ss_size;
299 } else {
300 struct rlimit limits;
301 getrlimit(RLIMIT_STACK, &limits);
302 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
303 }
304 // base may not be page aligned
305 address base = current_stack_base();
306 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
307 return (size_t)(base - bottom);
308 }
309
310 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
311 return localtime_r(clock, res);
312 }
313
314 // interruptible infrastructure
315
316 // setup_interruptible saves the thread state before going into an
317 // interruptible system call.
318 // The saved state is used to restore the thread to
319 // its former state whether or not an interrupt is received.
320 // Used by classloader os::read
321 // os::restartable_read calls skip this layer and stay in _thread_in_native
322
323 void os::Solaris::setup_interruptible(JavaThread* thread) {
324
325 JavaThreadState thread_state = thread->thread_state();
326
327 assert(thread_state != _thread_blocked, "Coming from the wrong thread");
328 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible");
329 OSThread* osthread = thread->osthread();
330 osthread->set_saved_interrupt_thread_state(thread_state);
331 thread->frame_anchor()->make_walkable(thread);
332 ThreadStateTransition::transition(thread, thread_state, _thread_blocked);
333 }
334
335 JavaThread* os::Solaris::setup_interruptible() {
336 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
337 setup_interruptible(thread);
338 return thread;
339 }
340
341 void os::Solaris::try_enable_extended_io() {
342 typedef int (*enable_extended_FILE_stdio_t)(int, int);
343
344 if (!UseExtendedFileIO) {
345 return;
346 }
347
348 enable_extended_FILE_stdio_t enabler =
349 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
350 "enable_extended_FILE_stdio");
351 if (enabler) {
352 enabler(-1, -1);
353 }
354 }
355
356
357 #ifdef ASSERT
358
359 JavaThread* os::Solaris::setup_interruptible_native() {
360 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
361 JavaThreadState thread_state = thread->thread_state();
362 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
363 return thread;
364 }
365
366 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) {
367 JavaThreadState thread_state = thread->thread_state();
368 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
369 }
370 #endif
371
372 // cleanup_interruptible reverses the effects of setup_interruptible
373 // setup_interruptible_already_blocked() does not need any cleanup.
374
375 void os::Solaris::cleanup_interruptible(JavaThread* thread) {
376 OSThread* osthread = thread->osthread();
377
378 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state());
379 }
380
381 // I/O interruption related counters called in _INTERRUPTIBLE
382
383 void os::Solaris::bump_interrupted_before_count() {
384 RuntimeService::record_interrupted_before_count();
385 }
386
387 void os::Solaris::bump_interrupted_during_count() {
388 RuntimeService::record_interrupted_during_count();
389 }
390
391 static int _processors_online = 0;
392
393 jint os::Solaris::_os_thread_limit = 0;
394 volatile jint os::Solaris::_os_thread_count = 0;
395
396 julong os::available_memory() {
397 return Solaris::available_memory();
398 }
399
400 julong os::Solaris::available_memory() {
401 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
402 }
403
404 julong os::Solaris::_physical_memory = 0;
405
406 julong os::physical_memory() {
407 return Solaris::physical_memory();
408 }
409
410 static hrtime_t first_hrtime = 0;
411 static const hrtime_t hrtime_hz = 1000*1000*1000;
412 const int LOCK_BUSY = 1;
413 const int LOCK_FREE = 0;
414 const int LOCK_INVALID = -1;
415 static volatile hrtime_t max_hrtime = 0;
416 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress
417
418
419 void os::Solaris::initialize_system_info() {
420 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
421 _processors_online = sysconf (_SC_NPROCESSORS_ONLN);
422 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
423 }
424
425 int os::active_processor_count() {
426 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
427 pid_t pid = getpid();
428 psetid_t pset = PS_NONE;
429 // Are we running in a processor set or is there any processor set around?
430 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
431 uint_t pset_cpus;
432 // Query the number of cpus available to us.
433 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
434 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
435 _processors_online = pset_cpus;
436 return pset_cpus;
437 }
438 }
439 // Otherwise return number of online cpus
440 return online_cpus;
441 }
442
443 static bool find_processors_in_pset(psetid_t pset,
444 processorid_t** id_array,
445 uint_t* id_length) {
446 bool result = false;
447 // Find the number of processors in the processor set.
448 if (pset_info(pset, NULL, id_length, NULL) == 0) {
449 // Make up an array to hold their ids.
450 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
451 // Fill in the array with their processor ids.
452 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
453 result = true;
454 }
455 }
456 return result;
457 }
458
459 // Callers of find_processors_online() must tolerate imprecise results --
460 // the system configuration can change asynchronously because of DR
461 // or explicit psradm operations.
462 //
463 // We also need to take care that the loop (below) terminates as the
464 // number of processors online can change between the _SC_NPROCESSORS_ONLN
465 // request and the loop that builds the list of processor ids. Unfortunately
466 // there's no reliable way to determine the maximum valid processor id,
467 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
468 // man pages, which claim the processor id set is "sparse, but
469 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
470 // exit the loop.
471 //
472 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
473 // not available on S8.0.
474
475 static bool find_processors_online(processorid_t** id_array,
476 uint* id_length) {
477 const processorid_t MAX_PROCESSOR_ID = 100000 ;
478 // Find the number of processors online.
479 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
480 // Make up an array to hold their ids.
481 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
482 // Processors need not be numbered consecutively.
483 long found = 0;
484 processorid_t next = 0;
485 while (found < *id_length && next < MAX_PROCESSOR_ID) {
486 processor_info_t info;
487 if (processor_info(next, &info) == 0) {
488 // NB, PI_NOINTR processors are effectively online ...
489 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
490 (*id_array)[found] = next;
491 found += 1;
492 }
493 }
494 next += 1;
495 }
496 if (found < *id_length) {
497 // The loop above didn't identify the expected number of processors.
498 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
499 // and re-running the loop, above, but there's no guarantee of progress
500 // if the system configuration is in flux. Instead, we just return what
501 // we've got. Note that in the worst case find_processors_online() could
502 // return an empty set. (As a fall-back in the case of the empty set we
503 // could just return the ID of the current processor).
504 *id_length = found ;
505 }
506
507 return true;
508 }
509
510 static bool assign_distribution(processorid_t* id_array,
511 uint id_length,
512 uint* distribution,
513 uint distribution_length) {
514 // We assume we can assign processorid_t's to uint's.
515 assert(sizeof(processorid_t) == sizeof(uint),
516 "can't convert processorid_t to uint");
517 // Quick check to see if we won't succeed.
518 if (id_length < distribution_length) {
519 return false;
520 }
521 // Assign processor ids to the distribution.
522 // Try to shuffle processors to distribute work across boards,
523 // assuming 4 processors per board.
524 const uint processors_per_board = ProcessDistributionStride;
525 // Find the maximum processor id.
526 processorid_t max_id = 0;
527 for (uint m = 0; m < id_length; m += 1) {
528 max_id = MAX2(max_id, id_array[m]);
529 }
530 // The next id, to limit loops.
531 const processorid_t limit_id = max_id + 1;
532 // Make up markers for available processors.
533 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
534 for (uint c = 0; c < limit_id; c += 1) {
535 available_id[c] = false;
536 }
537 for (uint a = 0; a < id_length; a += 1) {
538 available_id[id_array[a]] = true;
539 }
540 // Step by "boards", then by "slot", copying to "assigned".
541 // NEEDS_CLEANUP: The assignment of processors should be stateful,
542 // remembering which processors have been assigned by
543 // previous calls, etc., so as to distribute several
544 // independent calls of this method. What we'd like is
545 // It would be nice to have an API that let us ask
546 // how many processes are bound to a processor,
547 // but we don't have that, either.
548 // In the short term, "board" is static so that
549 // subsequent distributions don't all start at board 0.
550 static uint board = 0;
551 uint assigned = 0;
552 // Until we've found enough processors ....
553 while (assigned < distribution_length) {
554 // ... find the next available processor in the board.
555 for (uint slot = 0; slot < processors_per_board; slot += 1) {
556 uint try_id = board * processors_per_board + slot;
557 if ((try_id < limit_id) && (available_id[try_id] == true)) {
558 distribution[assigned] = try_id;
559 available_id[try_id] = false;
560 assigned += 1;
561 break;
562 }
563 }
564 board += 1;
565 if (board * processors_per_board + 0 >= limit_id) {
566 board = 0;
567 }
568 }
569 if (available_id != NULL) {
570 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal);
571 }
572 return true;
573 }
574
575 void os::set_native_thread_name(const char *name) {
576 // Not yet implemented.
577 return;
578 }
579
580 bool os::distribute_processes(uint length, uint* distribution) {
581 bool result = false;
582 // Find the processor id's of all the available CPUs.
583 processorid_t* id_array = NULL;
584 uint id_length = 0;
585 // There are some races between querying information and using it,
586 // since processor sets can change dynamically.
587 psetid_t pset = PS_NONE;
588 // Are we running in a processor set?
589 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
590 result = find_processors_in_pset(pset, &id_array, &id_length);
591 } else {
592 result = find_processors_online(&id_array, &id_length);
593 }
594 if (result == true) {
595 if (id_length >= length) {
596 result = assign_distribution(id_array, id_length, distribution, length);
597 } else {
598 result = false;
599 }
600 }
601 if (id_array != NULL) {
602 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal);
603 }
604 return result;
605 }
606
607 bool os::bind_to_processor(uint processor_id) {
608 // We assume that a processorid_t can be stored in a uint.
609 assert(sizeof(uint) == sizeof(processorid_t),
610 "can't convert uint to processorid_t");
611 int bind_result =
612 processor_bind(P_LWPID, // bind LWP.
613 P_MYID, // bind current LWP.
614 (processorid_t) processor_id, // id.
615 NULL); // don't return old binding.
616 return (bind_result == 0);
617 }
618
619 bool os::getenv(const char* name, char* buffer, int len) {
620 char* val = ::getenv( name );
621 if ( val == NULL
622 || strlen(val) + 1 > len ) {
623 if (len > 0) buffer[0] = 0; // return a null string
624 return false;
625 }
626 strcpy( buffer, val );
627 return true;
628 }
629
630
631 // Return true if user is running as root.
632
633 bool os::have_special_privileges() {
634 static bool init = false;
635 static bool privileges = false;
636 if (!init) {
637 privileges = (getuid() != geteuid()) || (getgid() != getegid());
638 init = true;
639 }
640 return privileges;
641 }
642
643
644 void os::init_system_properties_values() {
645 // The next steps are taken in the product version:
646 //
647 // Obtain the JAVA_HOME value from the location of libjvm.so.
648 // This library should be located at:
649 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so.
650 //
651 // If "/jre/lib/" appears at the right place in the path, then we
652 // assume libjvm.so is installed in a JDK and we use this path.
653 //
654 // Otherwise exit with message: "Could not create the Java virtual machine."
655 //
656 // The following extra steps are taken in the debugging version:
657 //
658 // If "/jre/lib/" does NOT appear at the right place in the path
659 // instead of exit check for $JAVA_HOME environment variable.
660 //
661 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
662 // then we append a fake suffix "hotspot/libjvm.so" to this path so
663 // it looks like libjvm.so is installed there
664 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so.
665 //
666 // Otherwise exit.
667 //
668 // Important note: if the location of libjvm.so changes this
669 // code needs to be changed accordingly.
670
671 // Base path of extensions installed on the system.
672 #define SYS_EXT_DIR "/usr/jdk/packages"
673 #define EXTENSIONS_DIR "/lib/ext"
674 #define ENDORSED_DIR "/lib/endorsed"
675
676 char cpu_arch[12];
677 // Buffer that fits several sprintfs.
678 // Note that the space for the colon and the trailing null are provided
679 // by the nulls included by the sizeof operator.
680 const size_t bufsize =
681 MAX4((size_t)MAXPATHLEN, // For dll_dir & friends.
682 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path
683 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir
684 (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir
685 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal);
686
687 // sysclasspath, java_home, dll_dir
688 {
689 char *pslash;
690 os::jvm_path(buf, bufsize);
691
692 // Found the full path to libjvm.so.
693 // Now cut the path to <java_home>/jre if we can.
694 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so.
695 pslash = strrchr(buf, '/');
696 if (pslash != NULL) {
697 *pslash = '\0'; // Get rid of /{client|server|hotspot}.
698 }
699 Arguments::set_dll_dir(buf);
700
701 if (pslash != NULL) {
702 pslash = strrchr(buf, '/');
703 if (pslash != NULL) {
704 *pslash = '\0'; // Get rid of /<arch>.
705 pslash = strrchr(buf, '/');
706 if (pslash != NULL) {
707 *pslash = '\0'; // Get rid of /lib.
708 }
709 }
710 }
711 Arguments::set_java_home(buf);
712
713 if (!set_boot_path('/', ':')) {
714 return;
715 }
716 }
717
718 // Where to look for native libraries.
719 {
720 // Use dlinfo() to determine the correct java.library.path.
721 //
722 // If we're launched by the Java launcher, and the user
723 // does not set java.library.path explicitly on the commandline,
724 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
725 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
726 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
727 // /usr/lib), which is exactly what we want.
728 //
729 // If the user does set java.library.path, it completely
730 // overwrites this setting, and always has.
731 //
732 // If we're not launched by the Java launcher, we may
733 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
734 // settings. Again, dlinfo does exactly what we want.
735
736 Dl_serinfo info_sz, *info = &info_sz;
737 Dl_serpath *path;
738 char *library_path;
739 char *common_path = buf;
740
741 // Determine search path count and required buffer size.
742 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
743 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
744 }
745
746 // Allocate new buffer and initialize.
747 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal);
748 info->dls_size = info_sz.dls_size;
749 info->dls_cnt = info_sz.dls_cnt;
750
751 // Obtain search path information.
752 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
753 FREE_C_HEAP_ARRAY(char, buf, mtInternal);
754 FREE_C_HEAP_ARRAY(char, info, mtInternal);
755 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
756 }
757
758 path = &info->dls_serpath[0];
759
760 // Note: Due to a legacy implementation, most of the library path
761 // is set in the launcher. This was to accomodate linking restrictions
762 // on legacy Solaris implementations (which are no longer supported).
763 // Eventually, all the library path setting will be done here.
764 //
765 // However, to prevent the proliferation of improperly built native
766 // libraries, the new path component /usr/jdk/packages is added here.
767
768 // Determine the actual CPU architecture.
769 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
770 #ifdef _LP64
771 // If we are a 64-bit vm, perform the following translations:
772 // sparc -> sparcv9
773 // i386 -> amd64
774 if (strcmp(cpu_arch, "sparc") == 0) {
775 strcat(cpu_arch, "v9");
776 } else if (strcmp(cpu_arch, "i386") == 0) {
777 strcpy(cpu_arch, "amd64");
778 }
779 #endif
780
781 // Construct the invariant part of ld_library_path.
782 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch);
783
784 // Struct size is more than sufficient for the path components obtained
785 // through the dlinfo() call, so only add additional space for the path
786 // components explicitly added here.
787 size_t library_path_size = info->dls_size + strlen(common_path);
788 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal);
789 library_path[0] = '\0';
790
791 // Construct the desired Java library path from the linker's library
792 // search path.
793 //
794 // For compatibility, it is optimal that we insert the additional path
795 // components specific to the Java VM after those components specified
796 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
797 // infrastructure.
798 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it.
799 strcpy(library_path, common_path);
800 } else {
801 int inserted = 0;
802 int i;
803 for (i = 0; i < info->dls_cnt; i++, path++) {
804 uint_t flags = path->dls_flags & LA_SER_MASK;
805 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
806 strcat(library_path, common_path);
807 strcat(library_path, os::path_separator());
808 inserted = 1;
809 }
810 strcat(library_path, path->dls_name);
811 strcat(library_path, os::path_separator());
812 }
813 // Eliminate trailing path separator.
814 library_path[strlen(library_path)-1] = '\0';
815 }
816
817 // happens before argument parsing - can't use a trace flag
818 // tty->print_raw("init_system_properties_values: native lib path: ");
819 // tty->print_raw_cr(library_path);
820
821 // Callee copies into its own buffer.
822 Arguments::set_library_path(library_path);
823
824 FREE_C_HEAP_ARRAY(char, library_path, mtInternal);
825 FREE_C_HEAP_ARRAY(char, info, mtInternal);
826 }
827
828 // Extensions directories.
829 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home());
830 Arguments::set_ext_dirs(buf);
831
832 // Endorsed standards default directory.
833 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
834 Arguments::set_endorsed_dirs(buf);
835
836 FREE_C_HEAP_ARRAY(char, buf, mtInternal);
837
838 #undef SYS_EXT_DIR
839 #undef EXTENSIONS_DIR
840 #undef ENDORSED_DIR
841 }
842
843 void os::breakpoint() {
844 BREAKPOINT;
845 }
846
847 bool os::obsolete_option(const JavaVMOption *option)
848 {
849 if (!strncmp(option->optionString, "-Xt", 3)) {
850 return true;
851 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
852 return true;
853 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
854 return true;
855 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
856 return true;
857 }
858 return false;
859 }
860
861 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
862 address stackStart = (address)thread->stack_base();
863 address stackEnd = (address)(stackStart - (address)thread->stack_size());
864 if (sp < stackStart && sp >= stackEnd ) return true;
865 return false;
866 }
867
868 extern "C" void breakpoint() {
869 // use debugger to set breakpoint here
870 }
871
872 static thread_t main_thread;
873
874 // Thread start routine for all new Java threads
875 extern "C" void* java_start(void* thread_addr) {
876 // Try to randomize the cache line index of hot stack frames.
877 // This helps when threads of the same stack traces evict each other's
878 // cache lines. The threads can be either from the same JVM instance, or
879 // from different JVM instances. The benefit is especially true for
880 // processors with hyperthreading technology.
881 static int counter = 0;
882 int pid = os::current_process_id();
883 alloca(((pid ^ counter++) & 7) * 128);
884
885 int prio;
886 Thread* thread = (Thread*)thread_addr;
887 OSThread* osthr = thread->osthread();
888
889 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound
890 thread->_schedctl = (void *) schedctl_init () ;
891
892 if (UseNUMA) {
893 int lgrp_id = os::numa_get_group_id();
894 if (lgrp_id != -1) {
895 thread->set_lgrp_id(lgrp_id);
896 }
897 }
898
899 // If the creator called set priority before we started,
900 // we need to call set_native_priority now that we have an lwp.
901 // We used to get the priority from thr_getprio (we called
902 // thr_setprio way back in create_thread) and pass it to
903 // set_native_priority, but Solaris scales the priority
904 // in java_to_os_priority, so when we read it back here,
905 // we pass trash to set_native_priority instead of what's
906 // in java_to_os_priority. So we save the native priority
907 // in the osThread and recall it here.
908
909 if ( osthr->thread_id() != -1 ) {
910 if ( UseThreadPriorities ) {
911 int prio = osthr->native_priority();
912 if (ThreadPriorityVerbose) {
913 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
914 INTPTR_FORMAT ", setting priority: %d\n",
915 osthr->thread_id(), osthr->lwp_id(), prio);
916 }
917 os::set_native_priority(thread, prio);
918 }
919 } else if (ThreadPriorityVerbose) {
920 warning("Can't set priority in _start routine, thread id hasn't been set\n");
921 }
922
923 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
924
925 // initialize signal mask for this thread
926 os::Solaris::hotspot_sigmask(thread);
927
928 thread->run();
929
930 // One less thread is executing
931 // When the VMThread gets here, the main thread may have already exited
932 // which frees the CodeHeap containing the Atomic::dec code
933 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
934 Atomic::dec(&os::Solaris::_os_thread_count);
935 }
936
937 if (UseDetachedThreads) {
938 thr_exit(NULL);
939 ShouldNotReachHere();
940 }
941 return NULL;
942 }
943
944 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
945 // Allocate the OSThread object
946 OSThread* osthread = new OSThread(NULL, NULL);
947 if (osthread == NULL) return NULL;
948
949 // Store info on the Solaris thread into the OSThread
950 osthread->set_thread_id(thread_id);
951 osthread->set_lwp_id(_lwp_self());
952 thread->_schedctl = (void *) schedctl_init () ;
953
954 if (UseNUMA) {
955 int lgrp_id = os::numa_get_group_id();
956 if (lgrp_id != -1) {
957 thread->set_lgrp_id(lgrp_id);
958 }
959 }
960
961 if ( ThreadPriorityVerbose ) {
962 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
963 osthread->thread_id(), osthread->lwp_id() );
964 }
965
966 // Initial thread state is INITIALIZED, not SUSPENDED
967 osthread->set_state(INITIALIZED);
968
969 return osthread;
970 }
971
972 void os::Solaris::hotspot_sigmask(Thread* thread) {
973
974 //Save caller's signal mask
975 sigset_t sigmask;
976 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
977 OSThread *osthread = thread->osthread();
978 osthread->set_caller_sigmask(sigmask);
979
980 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
981 if (!ReduceSignalUsage) {
982 if (thread->is_VM_thread()) {
983 // Only the VM thread handles BREAK_SIGNAL ...
984 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
985 } else {
986 // ... all other threads block BREAK_SIGNAL
987 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
988 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
989 }
990 }
991 }
992
993 bool os::create_attached_thread(JavaThread* thread) {
994 #ifdef ASSERT
995 thread->verify_not_published();
996 #endif
997 OSThread* osthread = create_os_thread(thread, thr_self());
998 if (osthread == NULL) {
999 return false;
1000 }
1001
1002 // Initial thread state is RUNNABLE
1003 osthread->set_state(RUNNABLE);
1004 thread->set_osthread(osthread);
1005
1006 // initialize signal mask for this thread
1007 // and save the caller's signal mask
1008 os::Solaris::hotspot_sigmask(thread);
1009
1010 return true;
1011 }
1012
1013 bool os::create_main_thread(JavaThread* thread) {
1014 #ifdef ASSERT
1015 thread->verify_not_published();
1016 #endif
1017 if (_starting_thread == NULL) {
1018 _starting_thread = create_os_thread(thread, main_thread);
1019 if (_starting_thread == NULL) {
1020 return false;
1021 }
1022 }
1023
1024 // The primodial thread is runnable from the start
1025 _starting_thread->set_state(RUNNABLE);
1026
1027 thread->set_osthread(_starting_thread);
1028
1029 // initialize signal mask for this thread
1030 // and save the caller's signal mask
1031 os::Solaris::hotspot_sigmask(thread);
1032
1033 return true;
1034 }
1035
1036 // _T2_libthread is true if we believe we are running with the newer
1037 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default)
1038 bool os::Solaris::_T2_libthread = false;
1039
1040 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
1041 // Allocate the OSThread object
1042 OSThread* osthread = new OSThread(NULL, NULL);
1043 if (osthread == NULL) {
1044 return false;
1045 }
1046
1047 if ( ThreadPriorityVerbose ) {
1048 char *thrtyp;
1049 switch ( thr_type ) {
1050 case vm_thread:
1051 thrtyp = (char *)"vm";
1052 break;
1053 case cgc_thread:
1054 thrtyp = (char *)"cgc";
1055 break;
1056 case pgc_thread:
1057 thrtyp = (char *)"pgc";
1058 break;
1059 case java_thread:
1060 thrtyp = (char *)"java";
1061 break;
1062 case compiler_thread:
1063 thrtyp = (char *)"compiler";
1064 break;
1065 case watcher_thread:
1066 thrtyp = (char *)"watcher";
1067 break;
1068 default:
1069 thrtyp = (char *)"unknown";
1070 break;
1071 }
1072 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
1073 }
1074
1075 // Calculate stack size if it's not specified by caller.
1076 if (stack_size == 0) {
1077 // The default stack size 1M (2M for LP64).
1078 stack_size = (BytesPerWord >> 2) * K * K;
1079
1080 switch (thr_type) {
1081 case os::java_thread:
1082 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
1083 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
1084 break;
1085 case os::compiler_thread:
1086 if (CompilerThreadStackSize > 0) {
1087 stack_size = (size_t)(CompilerThreadStackSize * K);
1088 break;
1089 } // else fall through:
1090 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1091 case os::vm_thread:
1092 case os::pgc_thread:
1093 case os::cgc_thread:
1094 case os::watcher_thread:
1095 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1096 break;
1097 }
1098 }
1099 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1100
1101 // Initial state is ALLOCATED but not INITIALIZED
1102 osthread->set_state(ALLOCATED);
1103
1104 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1105 // We got lots of threads. Check if we still have some address space left.
1106 // Need to be at least 5Mb of unreserved address space. We do check by
1107 // trying to reserve some.
1108 const size_t VirtualMemoryBangSize = 20*K*K;
1109 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1110 if (mem == NULL) {
1111 delete osthread;
1112 return false;
1113 } else {
1114 // Release the memory again
1115 os::release_memory(mem, VirtualMemoryBangSize);
1116 }
1117 }
1118
1119 // Setup osthread because the child thread may need it.
1120 thread->set_osthread(osthread);
1121
1122 // Create the Solaris thread
1123 // explicit THR_BOUND for T2_libthread case in case
1124 // that assumption is not accurate, but our alternate signal stack
1125 // handling is based on it which must have bound threads
1126 thread_t tid = 0;
1127 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED
1128 | ((UseBoundThreads || os::Solaris::T2_libthread() ||
1129 (thr_type == vm_thread) ||
1130 (thr_type == cgc_thread) ||
1131 (thr_type == pgc_thread) ||
1132 (thr_type == compiler_thread && BackgroundCompilation)) ?
1133 THR_BOUND : 0);
1134 int status;
1135
1136 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs.
1137 //
1138 // On multiprocessors systems, libthread sometimes under-provisions our
1139 // process with LWPs. On a 30-way systems, for instance, we could have
1140 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned
1141 // to our process. This can result in under utilization of PEs.
1142 // I suspect the problem is related to libthread's LWP
1143 // pool management and to the kernel's SIGBLOCKING "last LWP parked"
1144 // upcall policy.
1145 //
1146 // The following code is palliative -- it attempts to ensure that our
1147 // process has sufficient LWPs to take advantage of multiple PEs.
1148 // Proper long-term cures include using user-level threads bound to LWPs
1149 // (THR_BOUND) or using LWP-based synchronization. Note that there is a
1150 // slight timing window with respect to sampling _os_thread_count, but
1151 // the race is benign. Also, we should periodically recompute
1152 // _processors_online as the min of SC_NPROCESSORS_ONLN and the
1153 // the number of PEs in our partition. You might be tempted to use
1154 // THR_NEW_LWP here, but I'd recommend against it as that could
1155 // result in undesirable growth of the libthread's LWP pool.
1156 // The fix below isn't sufficient; for instance, it doesn't take into count
1157 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks.
1158 //
1159 // Some pathologies this scheme doesn't handle:
1160 // * Threads can block, releasing the LWPs. The LWPs can age out.
1161 // When a large number of threads become ready again there aren't
1162 // enough LWPs available to service them. This can occur when the
1163 // number of ready threads oscillates.
1164 // * LWPs/Threads park on IO, thus taking the LWP out of circulation.
1165 //
1166 // Finally, we should call thr_setconcurrency() periodically to refresh
1167 // the LWP pool and thwart the LWP age-out mechanism.
1168 // The "+3" term provides a little slop -- we want to slightly overprovision.
1169
1170 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) {
1171 if (!(flags & THR_BOUND)) {
1172 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation
1173 }
1174 }
1175 // Although this doesn't hurt, we should warn of undefined behavior
1176 // when using unbound T1 threads with schedctl(). This should never
1177 // happen, as the compiler and VM threads are always created bound
1178 DEBUG_ONLY(
1179 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) &&
1180 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) &&
1181 ((thr_type == vm_thread) || (thr_type == cgc_thread) ||
1182 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) {
1183 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound");
1184 }
1185 );
1186
1187
1188 // Mark that we don't have an lwp or thread id yet.
1189 // In case we attempt to set the priority before the thread starts.
1190 osthread->set_lwp_id(-1);
1191 osthread->set_thread_id(-1);
1192
1193 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1194 if (status != 0) {
1195 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1196 perror("os::create_thread");
1197 }
1198 thread->set_osthread(NULL);
1199 // Need to clean up stuff we've allocated so far
1200 delete osthread;
1201 return false;
1202 }
1203
1204 Atomic::inc(&os::Solaris::_os_thread_count);
1205
1206 // Store info on the Solaris thread into the OSThread
1207 osthread->set_thread_id(tid);
1208
1209 // Remember that we created this thread so we can set priority on it
1210 osthread->set_vm_created();
1211
1212 // Set the default thread priority. If using bound threads, setting
1213 // lwp priority will be delayed until thread start.
1214 set_native_priority(thread,
1215 DefaultThreadPriority == -1 ?
1216 java_to_os_priority[NormPriority] :
1217 DefaultThreadPriority);
1218
1219 // Initial thread state is INITIALIZED, not SUSPENDED
1220 osthread->set_state(INITIALIZED);
1221
1222 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1223 return true;
1224 }
1225
1226 /* defined for >= Solaris 10. This allows builds on earlier versions
1227 * of Solaris to take advantage of the newly reserved Solaris JVM signals
1228 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1229 * and -XX:+UseAltSigs does nothing since these should have no conflict
1230 */
1231 #if !defined(SIGJVM1)
1232 #define SIGJVM1 39
1233 #define SIGJVM2 40
1234 #endif
1235
1236 debug_only(static bool signal_sets_initialized = false);
1237 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1238 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1239 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1240
1241 bool os::Solaris::is_sig_ignored(int sig) {
1242 struct sigaction oact;
1243 sigaction(sig, (struct sigaction*)NULL, &oact);
1244 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1245 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1246 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
1247 return true;
1248 else
1249 return false;
1250 }
1251
1252 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1253 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1254 static bool isJVM1available() {
1255 return SIGJVM1 < SIGRTMIN;
1256 }
1257
1258 void os::Solaris::signal_sets_init() {
1259 // Should also have an assertion stating we are still single-threaded.
1260 assert(!signal_sets_initialized, "Already initialized");
1261 // Fill in signals that are necessarily unblocked for all threads in
1262 // the VM. Currently, we unblock the following signals:
1263 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1264 // by -Xrs (=ReduceSignalUsage));
1265 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1266 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1267 // the dispositions or masks wrt these signals.
1268 // Programs embedding the VM that want to use the above signals for their
1269 // own purposes must, at this time, use the "-Xrs" option to prevent
1270 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1271 // (See bug 4345157, and other related bugs).
1272 // In reality, though, unblocking these signals is really a nop, since
1273 // these signals are not blocked by default.
1274 sigemptyset(&unblocked_sigs);
1275 sigemptyset(&allowdebug_blocked_sigs);
1276 sigaddset(&unblocked_sigs, SIGILL);
1277 sigaddset(&unblocked_sigs, SIGSEGV);
1278 sigaddset(&unblocked_sigs, SIGBUS);
1279 sigaddset(&unblocked_sigs, SIGFPE);
1280
1281 if (isJVM1available) {
1282 os::Solaris::set_SIGinterrupt(SIGJVM1);
1283 os::Solaris::set_SIGasync(SIGJVM2);
1284 } else if (UseAltSigs) {
1285 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1286 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1287 } else {
1288 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1289 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1290 }
1291
1292 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1293 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1294
1295 if (!ReduceSignalUsage) {
1296 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1297 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1298 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1299 }
1300 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1301 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1302 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1303 }
1304 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1305 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1306 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1307 }
1308 }
1309 // Fill in signals that are blocked by all but the VM thread.
1310 sigemptyset(&vm_sigs);
1311 if (!ReduceSignalUsage)
1312 sigaddset(&vm_sigs, BREAK_SIGNAL);
1313 debug_only(signal_sets_initialized = true);
1314
1315 // For diagnostics only used in run_periodic_checks
1316 sigemptyset(&check_signal_done);
1317 }
1318
1319 // These are signals that are unblocked while a thread is running Java.
1320 // (For some reason, they get blocked by default.)
1321 sigset_t* os::Solaris::unblocked_signals() {
1322 assert(signal_sets_initialized, "Not initialized");
1323 return &unblocked_sigs;
1324 }
1325
1326 // These are the signals that are blocked while a (non-VM) thread is
1327 // running Java. Only the VM thread handles these signals.
1328 sigset_t* os::Solaris::vm_signals() {
1329 assert(signal_sets_initialized, "Not initialized");
1330 return &vm_sigs;
1331 }
1332
1333 // These are signals that are blocked during cond_wait to allow debugger in
1334 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1335 assert(signal_sets_initialized, "Not initialized");
1336 return &allowdebug_blocked_sigs;
1337 }
1338
1339
1340 void _handle_uncaught_cxx_exception() {
1341 VMError err("An uncaught C++ exception");
1342 err.report_and_die();
1343 }
1344
1345
1346 // First crack at OS-specific initialization, from inside the new thread.
1347 void os::initialize_thread(Thread* thr) {
1348 int r = thr_main() ;
1349 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
1350 if (r) {
1351 JavaThread* jt = (JavaThread *)thr;
1352 assert(jt != NULL,"Sanity check");
1353 size_t stack_size;
1354 address base = jt->stack_base();
1355 if (Arguments::created_by_java_launcher()) {
1356 // Use 2MB to allow for Solaris 7 64 bit mode.
1357 stack_size = JavaThread::stack_size_at_create() == 0
1358 ? 2048*K : JavaThread::stack_size_at_create();
1359
1360 // There are rare cases when we may have already used more than
1361 // the basic stack size allotment before this method is invoked.
1362 // Attempt to allow for a normally sized java_stack.
1363 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1364 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1365 } else {
1366 // 6269555: If we were not created by a Java launcher, i.e. if we are
1367 // running embedded in a native application, treat the primordial thread
1368 // as much like a native attached thread as possible. This means using
1369 // the current stack size from thr_stksegment(), unless it is too large
1370 // to reliably setup guard pages. A reasonable max size is 8MB.
1371 size_t current_size = current_stack_size();
1372 // This should never happen, but just in case....
1373 if (current_size == 0) current_size = 2 * K * K;
1374 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1375 }
1376 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1377 stack_size = (size_t)(base - bottom);
1378
1379 assert(stack_size > 0, "Stack size calculation problem");
1380
1381 if (stack_size > jt->stack_size()) {
1382 NOT_PRODUCT(
1383 struct rlimit limits;
1384 getrlimit(RLIMIT_STACK, &limits);
1385 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1386 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1387 )
1388 tty->print_cr(
1389 "Stack size of %d Kb exceeds current limit of %d Kb.\n"
1390 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1391 "See limit(1) to increase the stack size limit.",
1392 stack_size / K, jt->stack_size() / K);
1393 vm_exit(1);
1394 }
1395 assert(jt->stack_size() >= stack_size,
1396 "Attempt to map more stack than was allocated");
1397 jt->set_stack_size(stack_size);
1398 }
1399
1400 // 5/22/01: Right now alternate signal stacks do not handle
1401 // throwing stack overflow exceptions, see bug 4463178
1402 // Until a fix is found for this, T2 will NOT imply alternate signal
1403 // stacks.
1404 // If using T2 libthread threads, install an alternate signal stack.
1405 // Because alternate stacks associate with LWPs on Solaris,
1406 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads
1407 // we prefer to explicitly stack bang.
1408 // If not using T2 libthread, but using UseBoundThreads any threads
1409 // (primordial thread, jni_attachCurrentThread) we do not create,
1410 // probably are not bound, therefore they can not have an alternate
1411 // signal stack. Since our stack banging code is generated and
1412 // is shared across threads, all threads must be bound to allow
1413 // using alternate signal stacks. The alternative is to interpose
1414 // on _lwp_create to associate an alt sig stack with each LWP,
1415 // and this could be a problem when the JVM is embedded.
1416 // We would prefer to use alternate signal stacks with T2
1417 // Since there is currently no accurate way to detect T2
1418 // we do not. Assuming T2 when running T1 causes sig 11s or assertions
1419 // on installing alternate signal stacks
1420
1421
1422 // 05/09/03: removed alternate signal stack support for Solaris
1423 // The alternate signal stack mechanism is no longer needed to
1424 // handle stack overflow. This is now handled by allocating
1425 // guard pages (red zone) and stackbanging.
1426 // Initially the alternate signal stack mechanism was removed because
1427 // it did not work with T1 llibthread. Alternate
1428 // signal stacks MUST have all threads bound to lwps. Applications
1429 // can create their own threads and attach them without their being
1430 // bound under T1. This is frequently the case for the primordial thread.
1431 // If we were ever to reenable this mechanism we would need to
1432 // use the dynamic check for T2 libthread.
1433
1434 os::Solaris::init_thread_fpu_state();
1435 std::set_terminate(_handle_uncaught_cxx_exception);
1436 }
1437
1438
1439
1440 // Free Solaris resources related to the OSThread
1441 void os::free_thread(OSThread* osthread) {
1442 assert(osthread != NULL, "os::free_thread but osthread not set");
1443
1444
1445 // We are told to free resources of the argument thread,
1446 // but we can only really operate on the current thread.
1447 // The main thread must take the VMThread down synchronously
1448 // before the main thread exits and frees up CodeHeap
1449 guarantee((Thread::current()->osthread() == osthread
1450 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1451 if (Thread::current()->osthread() == osthread) {
1452 // Restore caller's signal mask
1453 sigset_t sigmask = osthread->caller_sigmask();
1454 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1455 }
1456 delete osthread;
1457 }
1458
1459 void os::pd_start_thread(Thread* thread) {
1460 int status = thr_continue(thread->osthread()->thread_id());
1461 assert_status(status == 0, status, "thr_continue failed");
1462 }
1463
1464
1465 intx os::current_thread_id() {
1466 return (intx)thr_self();
1467 }
1468
1469 static pid_t _initial_pid = 0;
1470
1471 int os::current_process_id() {
1472 return (int)(_initial_pid ? _initial_pid : getpid());
1473 }
1474
1475 int os::allocate_thread_local_storage() {
1476 // %%% in Win32 this allocates a memory segment pointed to by a
1477 // register. Dan Stein can implement a similar feature in
1478 // Solaris. Alternatively, the VM can do the same thing
1479 // explicitly: malloc some storage and keep the pointer in a
1480 // register (which is part of the thread's context) (or keep it
1481 // in TLS).
1482 // %%% In current versions of Solaris, thr_self and TSD can
1483 // be accessed via short sequences of displaced indirections.
1484 // The value of thr_self is available as %g7(36).
1485 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1486 // assuming that the current thread already has a value bound to k.
1487 // It may be worth experimenting with such access patterns,
1488 // and later having the parameters formally exported from a Solaris
1489 // interface. I think, however, that it will be faster to
1490 // maintain the invariant that %g2 always contains the
1491 // JavaThread in Java code, and have stubs simply
1492 // treat %g2 as a caller-save register, preserving it in a %lN.
1493 thread_key_t tk;
1494 if (thr_keycreate( &tk, NULL ) )
1495 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1496 "(%s)", strerror(errno)));
1497 return int(tk);
1498 }
1499
1500 void os::free_thread_local_storage(int index) {
1501 // %%% don't think we need anything here
1502 // if ( pthread_key_delete((pthread_key_t) tk) )
1503 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1504 }
1505
1506 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific
1507 // small number - point is NO swap space available
1508 void os::thread_local_storage_at_put(int index, void* value) {
1509 // %%% this is used only in threadLocalStorage.cpp
1510 if (thr_setspecific((thread_key_t)index, value)) {
1511 if (errno == ENOMEM) {
1512 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR,
1513 "thr_setspecific: out of swap space");
1514 } else {
1515 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1516 "(%s)", strerror(errno)));
1517 }
1518 } else {
1519 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ;
1520 }
1521 }
1522
1523 // This function could be called before TLS is initialized, for example, when
1524 // VM receives an async signal or when VM causes a fatal error during
1525 // initialization. Return NULL if thr_getspecific() fails.
1526 void* os::thread_local_storage_at(int index) {
1527 // %%% this is used only in threadLocalStorage.cpp
1528 void* r = NULL;
1529 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1530 }
1531
1532
1533 // gethrtime can move backwards if read from one cpu and then a different cpu
1534 // getTimeNanos is guaranteed to not move backward on Solaris
1535 // local spinloop created as faster for a CAS on an int than
1536 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not
1537 // supported on sparc v8 or pre supports_cx8 intel boxes.
1538 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong
1539 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes
1540 inline hrtime_t oldgetTimeNanos() {
1541 int gotlock = LOCK_INVALID;
1542 hrtime_t newtime = gethrtime();
1543
1544 for (;;) {
1545 // grab lock for max_hrtime
1546 int curlock = max_hrtime_lock;
1547 if (curlock & LOCK_BUSY) continue;
1548 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue;
1549 if (newtime > max_hrtime) {
1550 max_hrtime = newtime;
1551 } else {
1552 newtime = max_hrtime;
1553 }
1554 // release lock
1555 max_hrtime_lock = LOCK_FREE;
1556 return newtime;
1557 }
1558 }
1559 // gethrtime can move backwards if read from one cpu and then a different cpu
1560 // getTimeNanos is guaranteed to not move backward on Solaris
1561 inline hrtime_t getTimeNanos() {
1562 if (VM_Version::supports_cx8()) {
1563 const hrtime_t now = gethrtime();
1564 // Use atomic long load since 32-bit x86 uses 2 registers to keep long.
1565 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime);
1566 if (now <= prev) return prev; // same or retrograde time;
1567 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1568 assert(obsv >= prev, "invariant"); // Monotonicity
1569 // If the CAS succeeded then we're done and return "now".
1570 // If the CAS failed and the observed value "obs" is >= now then
1571 // we should return "obs". If the CAS failed and now > obs > prv then
1572 // some other thread raced this thread and installed a new value, in which case
1573 // we could either (a) retry the entire operation, (b) retry trying to install now
1574 // or (c) just return obs. We use (c). No loop is required although in some cases
1575 // we might discard a higher "now" value in deference to a slightly lower but freshly
1576 // installed obs value. That's entirely benign -- it admits no new orderings compared
1577 // to (a) or (b) -- and greatly reduces coherence traffic.
1578 // We might also condition (c) on the magnitude of the delta between obs and now.
1579 // Avoiding excessive CAS operations to hot RW locations is critical.
1580 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate
1581 return (prev == obsv) ? now : obsv ;
1582 } else {
1583 return oldgetTimeNanos();
1584 }
1585 }
1586
1587 // Time since start-up in seconds to a fine granularity.
1588 // Used by VMSelfDestructTimer and the MemProfiler.
1589 double os::elapsedTime() {
1590 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1591 }
1592
1593 jlong os::elapsed_counter() {
1594 return (jlong)(getTimeNanos() - first_hrtime);
1595 }
1596
1597 jlong os::elapsed_frequency() {
1598 return hrtime_hz;
1599 }
1600
1601 // Return the real, user, and system times in seconds from an
1602 // arbitrary fixed point in the past.
1603 bool os::getTimesSecs(double* process_real_time,
1604 double* process_user_time,
1605 double* process_system_time) {
1606 struct tms ticks;
1607 clock_t real_ticks = times(&ticks);
1608
1609 if (real_ticks == (clock_t) (-1)) {
1610 return false;
1611 } else {
1612 double ticks_per_second = (double) clock_tics_per_sec;
1613 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1614 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1615 // For consistency return the real time from getTimeNanos()
1616 // converted to seconds.
1617 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1618
1619 return true;
1620 }
1621 }
1622
1623 bool os::supports_vtime() { return true; }
1624
1625 bool os::enable_vtime() {
1626 int fd = ::open("/proc/self/ctl", O_WRONLY);
1627 if (fd == -1)
1628 return false;
1629
1630 long cmd[] = { PCSET, PR_MSACCT };
1631 int res = ::write(fd, cmd, sizeof(long) * 2);
1632 ::close(fd);
1633 if (res != sizeof(long) * 2)
1634 return false;
1635
1636 return true;
1637 }
1638
1639 bool os::vtime_enabled() {
1640 int fd = ::open("/proc/self/status", O_RDONLY);
1641 if (fd == -1)
1642 return false;
1643
1644 pstatus_t status;
1645 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1646 ::close(fd);
1647 if (res != sizeof(pstatus_t))
1648 return false;
1649
1650 return status.pr_flags & PR_MSACCT;
1651 }
1652
1653 double os::elapsedVTime() {
1654 return (double)gethrvtime() / (double)hrtime_hz;
1655 }
1656
1657 // Used internally for comparisons only
1658 // getTimeMillis guaranteed to not move backwards on Solaris
1659 jlong getTimeMillis() {
1660 jlong nanotime = getTimeNanos();
1661 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1662 }
1663
1664 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1665 jlong os::javaTimeMillis() {
1666 timeval t;
1667 if (gettimeofday( &t, NULL) == -1)
1668 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1669 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1670 }
1671
1672 jlong os::javaTimeNanos() {
1673 return (jlong)getTimeNanos();
1674 }
1675
1676 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1677 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1678 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1679 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1680 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1681 }
1682
1683 char * os::local_time_string(char *buf, size_t buflen) {
1684 struct tm t;
1685 time_t long_time;
1686 time(&long_time);
1687 localtime_r(&long_time, &t);
1688 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1689 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1690 t.tm_hour, t.tm_min, t.tm_sec);
1691 return buf;
1692 }
1693
1694 // Note: os::shutdown() might be called very early during initialization, or
1695 // called from signal handler. Before adding something to os::shutdown(), make
1696 // sure it is async-safe and can handle partially initialized VM.
1697 void os::shutdown() {
1698
1699 // allow PerfMemory to attempt cleanup of any persistent resources
1700 perfMemory_exit();
1701
1702 // needs to remove object in file system
1703 AttachListener::abort();
1704
1705 // flush buffered output, finish log files
1706 ostream_abort();
1707
1708 // Check for abort hook
1709 abort_hook_t abort_hook = Arguments::abort_hook();
1710 if (abort_hook != NULL) {
1711 abort_hook();
1712 }
1713 }
1714
1715 // Note: os::abort() might be called very early during initialization, or
1716 // called from signal handler. Before adding something to os::abort(), make
1717 // sure it is async-safe and can handle partially initialized VM.
1718 void os::abort(bool dump_core) {
1719 os::shutdown();
1720 if (dump_core) {
1721 #ifndef PRODUCT
1722 fdStream out(defaultStream::output_fd());
1723 out.print_raw("Current thread is ");
1724 char buf[16];
1725 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1726 out.print_raw_cr(buf);
1727 out.print_raw_cr("Dumping core ...");
1728 #endif
1729 ::abort(); // dump core (for debugging)
1730 }
1731
1732 ::exit(1);
1733 }
1734
1735 // Die immediately, no exit hook, no abort hook, no cleanup.
1736 void os::die() {
1737 ::abort(); // dump core (for debugging)
1738 }
1739
1740 // unused
1741 void os::set_error_file(const char *logfile) {}
1742
1743 // DLL functions
1744
1745 const char* os::dll_file_extension() { return ".so"; }
1746
1747 // This must be hard coded because it's the system's temporary
1748 // directory not the java application's temp directory, ala java.io.tmpdir.
1749 const char* os::get_temp_directory() { return "/tmp"; }
1750
1751 static bool file_exists(const char* filename) {
1752 struct stat statbuf;
1753 if (filename == NULL || strlen(filename) == 0) {
1754 return false;
1755 }
1756 return os::stat(filename, &statbuf) == 0;
1757 }
1758
1759 bool os::dll_build_name(char* buffer, size_t buflen,
1760 const char* pname, const char* fname) {
1761 bool retval = false;
1762 const size_t pnamelen = pname ? strlen(pname) : 0;
1763
1764 // Return error on buffer overflow.
1765 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1766 return retval;
1767 }
1768
1769 if (pnamelen == 0) {
1770 snprintf(buffer, buflen, "lib%s.so", fname);
1771 retval = true;
1772 } else if (strchr(pname, *os::path_separator()) != NULL) {
1773 int n;
1774 char** pelements = split_path(pname, &n);
1775 if (pelements == NULL) {
1776 return false;
1777 }
1778 for (int i = 0 ; i < n ; i++) {
1779 // really shouldn't be NULL but what the heck, check can't hurt
1780 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1781 continue; // skip the empty path values
1782 }
1783 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1784 if (file_exists(buffer)) {
1785 retval = true;
1786 break;
1787 }
1788 }
1789 // release the storage
1790 for (int i = 0 ; i < n ; i++) {
1791 if (pelements[i] != NULL) {
1792 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
1793 }
1794 }
1795 if (pelements != NULL) {
1796 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
1797 }
1798 } else {
1799 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1800 retval = true;
1801 }
1802 return retval;
1803 }
1804
1805 // check if addr is inside libjvm.so
1806 bool os::address_is_in_vm(address addr) {
1807 static address libjvm_base_addr;
1808 Dl_info dlinfo;
1809
1810 if (libjvm_base_addr == NULL) {
1811 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
1812 libjvm_base_addr = (address)dlinfo.dli_fbase;
1813 }
1814 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1815 }
1816
1817 if (dladdr((void *)addr, &dlinfo) != 0) {
1818 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1819 }
1820
1821 return false;
1822 }
1823
1824 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int);
1825 static dladdr1_func_type dladdr1_func = NULL;
1826
1827 bool os::dll_address_to_function_name(address addr, char *buf,
1828 int buflen, int * offset) {
1829 // buf is not optional, but offset is optional
1830 assert(buf != NULL, "sanity check");
1831
1832 Dl_info dlinfo;
1833
1834 // dladdr1_func was initialized in os::init()
1835 if (dladdr1_func != NULL) {
1836 // yes, we have dladdr1
1837
1838 // Support for dladdr1 is checked at runtime; it may be
1839 // available even if the vm is built on a machine that does
1840 // not have dladdr1 support. Make sure there is a value for
1841 // RTLD_DL_SYMENT.
1842 #ifndef RTLD_DL_SYMENT
1843 #define RTLD_DL_SYMENT 1
1844 #endif
1845 #ifdef _LP64
1846 Elf64_Sym * info;
1847 #else
1848 Elf32_Sym * info;
1849 #endif
1850 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1851 RTLD_DL_SYMENT) != 0) {
1852 // see if we have a matching symbol that covers our address
1853 if (dlinfo.dli_saddr != NULL &&
1854 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1855 if (dlinfo.dli_sname != NULL) {
1856 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1857 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1858 }
1859 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1860 return true;
1861 }
1862 }
1863 // no matching symbol so try for just file info
1864 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1865 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1866 buf, buflen, offset, dlinfo.dli_fname)) {
1867 return true;
1868 }
1869 }
1870 }
1871 buf[0] = '\0';
1872 if (offset != NULL) *offset = -1;
1873 return false;
1874 }
1875
1876 // no, only dladdr is available
1877 if (dladdr((void *)addr, &dlinfo) != 0) {
1878 // see if we have a matching symbol
1879 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
1880 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1881 jio_snprintf(buf, buflen, dlinfo.dli_sname);
1882 }
1883 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1884 return true;
1885 }
1886 // no matching symbol so try for just file info
1887 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1888 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1889 buf, buflen, offset, dlinfo.dli_fname)) {
1890 return true;
1891 }
1892 }
1893 }
1894 buf[0] = '\0';
1895 if (offset != NULL) *offset = -1;
1896 return false;
1897 }
1898
1899 bool os::dll_address_to_library_name(address addr, char* buf,
1900 int buflen, int* offset) {
1901 // buf is not optional, but offset is optional
1902 assert(buf != NULL, "sanity check");
1903
1904 Dl_info dlinfo;
1905
1906 if (dladdr((void*)addr, &dlinfo) != 0) {
1907 if (dlinfo.dli_fname != NULL) {
1908 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1909 }
1910 if (dlinfo.dli_fbase != NULL && offset != NULL) {
1911 *offset = addr - (address)dlinfo.dli_fbase;
1912 }
1913 return true;
1914 }
1915
1916 buf[0] = '\0';
1917 if (offset) *offset = -1;
1918 return false;
1919 }
1920
1921 // Prints the names and full paths of all opened dynamic libraries
1922 // for current process
1923 void os::print_dll_info(outputStream * st) {
1924 Dl_info dli;
1925 void *handle;
1926 Link_map *map;
1927 Link_map *p;
1928
1929 st->print_cr("Dynamic libraries:"); st->flush();
1930
1931 if (dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli) == 0 ||
1932 dli.dli_fname == NULL) {
1933 st->print_cr("Error: Cannot print dynamic libraries.");
1934 return;
1935 }
1936 handle = dlopen(dli.dli_fname, RTLD_LAZY);
1937 if (handle == NULL) {
1938 st->print_cr("Error: Cannot print dynamic libraries.");
1939 return;
1940 }
1941 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1942 if (map == NULL) {
1943 st->print_cr("Error: Cannot print dynamic libraries.");
1944 return;
1945 }
1946
1947 while (map->l_prev != NULL)
1948 map = map->l_prev;
1949
1950 while (map != NULL) {
1951 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
1952 map = map->l_next;
1953 }
1954
1955 dlclose(handle);
1956 }
1957
1958 // Loads .dll/.so and
1959 // in case of error it checks if .dll/.so was built for the
1960 // same architecture as Hotspot is running on
1961
1962 void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
1963 {
1964 void * result= ::dlopen(filename, RTLD_LAZY);
1965 if (result != NULL) {
1966 // Successful loading
1967 return result;
1968 }
1969
1970 Elf32_Ehdr elf_head;
1971
1972 // Read system error message into ebuf
1973 // It may or may not be overwritten below
1974 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
1975 ebuf[ebuflen-1]='\0';
1976 int diag_msg_max_length=ebuflen-strlen(ebuf);
1977 char* diag_msg_buf=ebuf+strlen(ebuf);
1978
1979 if (diag_msg_max_length==0) {
1980 // No more space in ebuf for additional diagnostics message
1981 return NULL;
1982 }
1983
1984
1985 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1986
1987 if (file_descriptor < 0) {
1988 // Can't open library, report dlerror() message
1989 return NULL;
1990 }
1991
1992 bool failed_to_read_elf_head=
1993 (sizeof(elf_head)!=
1994 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
1995
1996 ::close(file_descriptor);
1997 if (failed_to_read_elf_head) {
1998 // file i/o error - report dlerror() msg
1999 return NULL;
2000 }
2001
2002 typedef struct {
2003 Elf32_Half code; // Actual value as defined in elf.h
2004 Elf32_Half compat_class; // Compatibility of archs at VM's sense
2005 char elf_class; // 32 or 64 bit
2006 char endianess; // MSB or LSB
2007 char* name; // String representation
2008 } arch_t;
2009
2010 static const arch_t arch_array[]={
2011 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2012 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2013 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
2014 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
2015 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2016 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2017 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
2018 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
2019 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
2020 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
2021 };
2022
2023 #if (defined IA32)
2024 static Elf32_Half running_arch_code=EM_386;
2025 #elif (defined AMD64)
2026 static Elf32_Half running_arch_code=EM_X86_64;
2027 #elif (defined IA64)
2028 static Elf32_Half running_arch_code=EM_IA_64;
2029 #elif (defined __sparc) && (defined _LP64)
2030 static Elf32_Half running_arch_code=EM_SPARCV9;
2031 #elif (defined __sparc) && (!defined _LP64)
2032 static Elf32_Half running_arch_code=EM_SPARC;
2033 #elif (defined __powerpc64__)
2034 static Elf32_Half running_arch_code=EM_PPC64;
2035 #elif (defined __powerpc__)
2036 static Elf32_Half running_arch_code=EM_PPC;
2037 #elif (defined ARM)
2038 static Elf32_Half running_arch_code=EM_ARM;
2039 #else
2040 #error Method os::dll_load requires that one of following is defined:\
2041 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
2042 #endif
2043
2044 // Identify compatability class for VM's architecture and library's architecture
2045 // Obtain string descriptions for architectures
2046
2047 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
2048 int running_arch_index=-1;
2049
2050 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
2051 if (running_arch_code == arch_array[i].code) {
2052 running_arch_index = i;
2053 }
2054 if (lib_arch.code == arch_array[i].code) {
2055 lib_arch.compat_class = arch_array[i].compat_class;
2056 lib_arch.name = arch_array[i].name;
2057 }
2058 }
2059
2060 assert(running_arch_index != -1,
2061 "Didn't find running architecture code (running_arch_code) in arch_array");
2062 if (running_arch_index == -1) {
2063 // Even though running architecture detection failed
2064 // we may still continue with reporting dlerror() message
2065 return NULL;
2066 }
2067
2068 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
2069 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
2070 return NULL;
2071 }
2072
2073 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
2074 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
2075 return NULL;
2076 }
2077
2078 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
2079 if ( lib_arch.name!=NULL ) {
2080 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2081 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
2082 lib_arch.name, arch_array[running_arch_index].name);
2083 } else {
2084 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2085 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
2086 lib_arch.code,
2087 arch_array[running_arch_index].name);
2088 }
2089 }
2090
2091 return NULL;
2092 }
2093
2094 void* os::dll_lookup(void* handle, const char* name) {
2095 return dlsym(handle, name);
2096 }
2097
2098 void* os::get_default_process_handle() {
2099 return (void*)::dlopen(NULL, RTLD_LAZY);
2100 }
2101
2102 int os::stat(const char *path, struct stat *sbuf) {
2103 char pathbuf[MAX_PATH];
2104 if (strlen(path) > MAX_PATH - 1) {
2105 errno = ENAMETOOLONG;
2106 return -1;
2107 }
2108 os::native_path(strcpy(pathbuf, path));
2109 return ::stat(pathbuf, sbuf);
2110 }
2111
2112 static bool _print_ascii_file(const char* filename, outputStream* st) {
2113 int fd = ::open(filename, O_RDONLY);
2114 if (fd == -1) {
2115 return false;
2116 }
2117
2118 char buf[32];
2119 int bytes;
2120 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
2121 st->print_raw(buf, bytes);
2122 }
2123
2124 ::close(fd);
2125
2126 return true;
2127 }
2128
2129 void os::print_os_info_brief(outputStream* st) {
2130 os::Solaris::print_distro_info(st);
2131
2132 os::Posix::print_uname_info(st);
2133
2134 os::Solaris::print_libversion_info(st);
2135 }
2136
2137 void os::print_os_info(outputStream* st) {
2138 st->print("OS:");
2139
2140 os::Solaris::print_distro_info(st);
2141
2142 os::Posix::print_uname_info(st);
2143
2144 os::Solaris::print_libversion_info(st);
2145
2146 os::Posix::print_rlimit_info(st);
2147
2148 os::Posix::print_load_average(st);
2149 }
2150
2151 void os::Solaris::print_distro_info(outputStream* st) {
2152 if (!_print_ascii_file("/etc/release", st)) {
2153 st->print("Solaris");
2154 }
2155 st->cr();
2156 }
2157
2158 void os::Solaris::print_libversion_info(outputStream* st) {
2159 if (os::Solaris::T2_libthread()) {
2160 st->print(" (T2 libthread)");
2161 }
2162 else {
2163 st->print(" (T1 libthread)");
2164 }
2165 st->cr();
2166 }
2167
2168 static bool check_addr0(outputStream* st) {
2169 jboolean status = false;
2170 int fd = ::open("/proc/self/map",O_RDONLY);
2171 if (fd >= 0) {
2172 prmap_t p;
2173 while(::read(fd, &p, sizeof(p)) > 0) {
2174 if (p.pr_vaddr == 0x0) {
2175 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
2176 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
2177 st->print("Access:");
2178 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
2179 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
2180 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
2181 st->cr();
2182 status = true;
2183 }
2184 }
2185 ::close(fd);
2186 }
2187 return status;
2188 }
2189
2190 void os::pd_print_cpu_info(outputStream* st) {
2191 // Nothing to do for now.
2192 }
2193
2194 void os::print_memory_info(outputStream* st) {
2195 st->print("Memory:");
2196 st->print(" %dk page", os::vm_page_size()>>10);
2197 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2198 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2199 st->cr();
2200 (void) check_addr0(st);
2201 }
2202
2203 void os::print_siginfo(outputStream* st, void* siginfo) {
2204 const siginfo_t* si = (const siginfo_t*)siginfo;
2205
2206 os::Posix::print_siginfo_brief(st, si);
2207
2208 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2209 UseSharedSpaces) {
2210 FileMapInfo* mapinfo = FileMapInfo::current_info();
2211 if (mapinfo->is_in_shared_space(si->si_addr)) {
2212 st->print("\n\nError accessing class data sharing archive." \
2213 " Mapped file inaccessible during execution, " \
2214 " possible disk/network problem.");
2215 }
2216 }
2217 st->cr();
2218 }
2219
2220 // Moved from whole group, because we need them here for diagnostic
2221 // prints.
2222 #define OLDMAXSIGNUM 32
2223 static int Maxsignum = 0;
2224 static int *ourSigFlags = NULL;
2225
2226 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2227
2228 int os::Solaris::get_our_sigflags(int sig) {
2229 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2230 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2231 return ourSigFlags[sig];
2232 }
2233
2234 void os::Solaris::set_our_sigflags(int sig, int flags) {
2235 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2236 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2237 ourSigFlags[sig] = flags;
2238 }
2239
2240
2241 static const char* get_signal_handler_name(address handler,
2242 char* buf, int buflen) {
2243 int offset;
2244 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2245 if (found) {
2246 // skip directory names
2247 const char *p1, *p2;
2248 p1 = buf;
2249 size_t len = strlen(os::file_separator());
2250 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2251 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2252 } else {
2253 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2254 }
2255 return buf;
2256 }
2257
2258 static void print_signal_handler(outputStream* st, int sig,
2259 char* buf, size_t buflen) {
2260 struct sigaction sa;
2261
2262 sigaction(sig, NULL, &sa);
2263
2264 st->print("%s: ", os::exception_name(sig, buf, buflen));
2265
2266 address handler = (sa.sa_flags & SA_SIGINFO)
2267 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2268 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2269
2270 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2271 st->print("SIG_DFL");
2272 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2273 st->print("SIG_IGN");
2274 } else {
2275 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2276 }
2277
2278 st->print(", sa_mask[0]=");
2279 os::Posix::print_signal_set_short(st, &sa.sa_mask);
2280
2281 address rh = VMError::get_resetted_sighandler(sig);
2282 // May be, handler was resetted by VMError?
2283 if(rh != NULL) {
2284 handler = rh;
2285 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2286 }
2287
2288 st->print(", sa_flags=");
2289 os::Posix::print_sa_flags(st, sa.sa_flags);
2290
2291 // Check: is it our handler?
2292 if(handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2293 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2294 // It is our signal handler
2295 // check for flags
2296 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2297 st->print(
2298 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2299 os::Solaris::get_our_sigflags(sig));
2300 }
2301 }
2302 st->cr();
2303 }
2304
2305 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2306 st->print_cr("Signal Handlers:");
2307 print_signal_handler(st, SIGSEGV, buf, buflen);
2308 print_signal_handler(st, SIGBUS , buf, buflen);
2309 print_signal_handler(st, SIGFPE , buf, buflen);
2310 print_signal_handler(st, SIGPIPE, buf, buflen);
2311 print_signal_handler(st, SIGXFSZ, buf, buflen);
2312 print_signal_handler(st, SIGILL , buf, buflen);
2313 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2314 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2315 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2316 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2317 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2318 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2319 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2320 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2321 }
2322
2323 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2324
2325 // Find the full path to the current module, libjvm.so
2326 void os::jvm_path(char *buf, jint buflen) {
2327 // Error checking.
2328 if (buflen < MAXPATHLEN) {
2329 assert(false, "must use a large-enough buffer");
2330 buf[0] = '\0';
2331 return;
2332 }
2333 // Lazy resolve the path to current module.
2334 if (saved_jvm_path[0] != 0) {
2335 strcpy(buf, saved_jvm_path);
2336 return;
2337 }
2338
2339 Dl_info dlinfo;
2340 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2341 assert(ret != 0, "cannot locate libjvm");
2342 if (ret != 0 && dlinfo.dli_fname != NULL) {
2343 realpath((char *)dlinfo.dli_fname, buf);
2344 } else {
2345 buf[0] = '\0';
2346 return;
2347 }
2348
2349 if (Arguments::sun_java_launcher_is_altjvm()) {
2350 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical
2351 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".
2352 // If "/jre/lib/" appears at the right place in the string, then
2353 // assume we are installed in a JDK and we're done. Otherwise, check
2354 // for a JAVA_HOME environment variable and fix up the path so it
2355 // looks like libjvm.so is installed there (append a fake suffix
2356 // hotspot/libjvm.so).
2357 const char *p = buf + strlen(buf) - 1;
2358 for (int count = 0; p > buf && count < 5; ++count) {
2359 for (--p; p > buf && *p != '/'; --p)
2360 /* empty */ ;
2361 }
2362
2363 if (strncmp(p, "/jre/lib/", 9) != 0) {
2364 // Look for JAVA_HOME in the environment.
2365 char* java_home_var = ::getenv("JAVA_HOME");
2366 if (java_home_var != NULL && java_home_var[0] != 0) {
2367 char cpu_arch[12];
2368 char* jrelib_p;
2369 int len;
2370 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2371 #ifdef _LP64
2372 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2373 if (strcmp(cpu_arch, "sparc") == 0) {
2374 strcat(cpu_arch, "v9");
2375 } else if (strcmp(cpu_arch, "i386") == 0) {
2376 strcpy(cpu_arch, "amd64");
2377 }
2378 #endif
2379 // Check the current module name "libjvm.so".
2380 p = strrchr(buf, '/');
2381 assert(strstr(p, "/libjvm") == p, "invalid library name");
2382
2383 realpath(java_home_var, buf);
2384 // determine if this is a legacy image or modules image
2385 // modules image doesn't have "jre" subdirectory
2386 len = strlen(buf);
2387 jrelib_p = buf + len;
2388 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2389 if (0 != access(buf, F_OK)) {
2390 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2391 }
2392
2393 if (0 == access(buf, F_OK)) {
2394 // Use current module name "libjvm.so"
2395 len = strlen(buf);
2396 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
2397 } else {
2398 // Go back to path of .so
2399 realpath((char *)dlinfo.dli_fname, buf);
2400 }
2401 }
2402 }
2403 }
2404
2405 strcpy(saved_jvm_path, buf);
2406 }
2407
2408
2409 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2410 // no prefix required, not even "_"
2411 }
2412
2413
2414 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2415 // no suffix required
2416 }
2417
2418 // This method is a copy of JDK's sysGetLastErrorString
2419 // from src/solaris/hpi/src/system_md.c
2420
2421 size_t os::lasterror(char *buf, size_t len) {
2422
2423 if (errno == 0) return 0;
2424
2425 const char *s = ::strerror(errno);
2426 size_t n = ::strlen(s);
2427 if (n >= len) {
2428 n = len - 1;
2429 }
2430 ::strncpy(buf, s, n);
2431 buf[n] = '\0';
2432 return n;
2433 }
2434
2435
2436 // sun.misc.Signal
2437
2438 extern "C" {
2439 static void UserHandler(int sig, void *siginfo, void *context) {
2440 // Ctrl-C is pressed during error reporting, likely because the error
2441 // handler fails to abort. Let VM die immediately.
2442 if (sig == SIGINT && is_error_reported()) {
2443 os::die();
2444 }
2445
2446 os::signal_notify(sig);
2447 // We do not need to reinstate the signal handler each time...
2448 }
2449 }
2450
2451 void* os::user_handler() {
2452 return CAST_FROM_FN_PTR(void*, UserHandler);
2453 }
2454
2455 class Semaphore : public StackObj {
2456 public:
2457 Semaphore();
2458 ~Semaphore();
2459 void signal();
2460 void wait();
2461 bool trywait();
2462 bool timedwait(unsigned int sec, int nsec);
2463 private:
2464 sema_t _semaphore;
2465 };
2466
2467
2468 Semaphore::Semaphore() {
2469 sema_init(&_semaphore, 0, NULL, NULL);
2470 }
2471
2472 Semaphore::~Semaphore() {
2473 sema_destroy(&_semaphore);
2474 }
2475
2476 void Semaphore::signal() {
2477 sema_post(&_semaphore);
2478 }
2479
2480 void Semaphore::wait() {
2481 sema_wait(&_semaphore);
2482 }
2483
2484 bool Semaphore::trywait() {
2485 return sema_trywait(&_semaphore) == 0;
2486 }
2487
2488 bool Semaphore::timedwait(unsigned int sec, int nsec) {
2489 struct timespec ts;
2490 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec);
2491
2492 while (1) {
2493 int result = sema_timedwait(&_semaphore, &ts);
2494 if (result == 0) {
2495 return true;
2496 } else if (errno == EINTR) {
2497 continue;
2498 } else if (errno == ETIME) {
2499 return false;
2500 } else {
2501 return false;
2502 }
2503 }
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), mtInternal);
2560 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2561
2562 if (UseSignalChaining) {
2563 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2564 * (Maxsignum + 1), mtInternal);
2565 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2566 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2567 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2568 }
2569 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal);
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
2657 static bool recoverable_mmap_error(int err) {
2658 // See if the error is one we can let the caller handle. This
2659 // list of errno values comes from the Solaris mmap(2) man page.
2660 switch (err) {
2661 case EBADF:
2662 case EINVAL:
2663 case ENOTSUP:
2664 // let the caller deal with these errors
2665 return true;
2666
2667 default:
2668 // Any remaining errors on this OS can cause our reserved mapping
2669 // to be lost. That can cause confusion where different data
2670 // structures think they have the same memory mapped. The worst
2671 // scenario is if both the VM and a library think they have the
2672 // same memory mapped.
2673 return false;
2674 }
2675 }
2676
2677 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec,
2678 int err) {
2679 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2680 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec,
2681 strerror(err), err);
2682 }
2683
2684 static void warn_fail_commit_memory(char* addr, size_t bytes,
2685 size_t alignment_hint, bool exec,
2686 int err) {
2687 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2688 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes,
2689 alignment_hint, exec, strerror(err), err);
2690 }
2691
2692 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) {
2693 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2694 size_t size = bytes;
2695 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2696 if (res != NULL) {
2697 if (UseNUMAInterleaving) {
2698 numa_make_global(addr, bytes);
2699 }
2700 return 0;
2701 }
2702
2703 int err = errno; // save errno from mmap() call in mmap_chunk()
2704
2705 if (!recoverable_mmap_error(err)) {
2706 warn_fail_commit_memory(addr, bytes, exec, err);
2707 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory.");
2708 }
2709
2710 return err;
2711 }
2712
2713 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2714 return Solaris::commit_memory_impl(addr, bytes, exec) == 0;
2715 }
2716
2717 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec,
2718 const char* mesg) {
2719 assert(mesg != NULL, "mesg must be specified");
2720 int err = os::Solaris::commit_memory_impl(addr, bytes, exec);
2721 if (err != 0) {
2722 // the caller wants all commit errors to exit with the specified mesg:
2723 warn_fail_commit_memory(addr, bytes, exec, err);
2724 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2725 }
2726 }
2727
2728 int os::Solaris::commit_memory_impl(char* addr, size_t bytes,
2729 size_t alignment_hint, bool exec) {
2730 int err = Solaris::commit_memory_impl(addr, bytes, exec);
2731 if (err == 0) {
2732 if (UseLargePages && (alignment_hint > (size_t)vm_page_size())) {
2733 // If the large page size has been set and the VM
2734 // is using large pages, use the large page size
2735 // if it is smaller than the alignment hint. This is
2736 // a case where the VM wants to use a larger alignment size
2737 // for its own reasons but still want to use large pages
2738 // (which is what matters to setting the mpss range.
2739 size_t page_size = 0;
2740 if (large_page_size() < alignment_hint) {
2741 assert(UseLargePages, "Expected to be here for large page use only");
2742 page_size = large_page_size();
2743 } else {
2744 // If the alignment hint is less than the large page
2745 // size, the VM wants a particular alignment (thus the hint)
2746 // for internal reasons. Try to set the mpss range using
2747 // the alignment_hint.
2748 page_size = alignment_hint;
2749 }
2750 // Since this is a hint, ignore any failures.
2751 (void)Solaris::setup_large_pages(addr, bytes, page_size);
2752 }
2753 }
2754 return err;
2755 }
2756
2757 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2758 bool exec) {
2759 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0;
2760 }
2761
2762 void os::pd_commit_memory_or_exit(char* addr, size_t bytes,
2763 size_t alignment_hint, bool exec,
2764 const char* mesg) {
2765 assert(mesg != NULL, "mesg must be specified");
2766 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec);
2767 if (err != 0) {
2768 // the caller wants all commit errors to exit with the specified mesg:
2769 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err);
2770 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2771 }
2772 }
2773
2774 // Uncommit the pages in a specified region.
2775 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2776 if (madvise(addr, bytes, MADV_FREE) < 0) {
2777 debug_only(warning("MADV_FREE failed."));
2778 return;
2779 }
2780 }
2781
2782 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2783 return os::commit_memory(addr, size, !ExecMem);
2784 }
2785
2786 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2787 return os::uncommit_memory(addr, size);
2788 }
2789
2790 // Change the page size in a given range.
2791 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2792 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2793 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2794 if (UseLargePages) {
2795 Solaris::setup_large_pages(addr, bytes, alignment_hint);
2796 }
2797 }
2798
2799 // Tell the OS to make the range local to the first-touching LWP
2800 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2801 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2802 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2803 debug_only(warning("MADV_ACCESS_LWP failed."));
2804 }
2805 }
2806
2807 // Tell the OS that this range would be accessed from different LWPs.
2808 void os::numa_make_global(char *addr, size_t bytes) {
2809 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2810 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2811 debug_only(warning("MADV_ACCESS_MANY failed."));
2812 }
2813 }
2814
2815 // Get the number of the locality groups.
2816 size_t os::numa_get_groups_num() {
2817 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2818 return n != -1 ? n : 1;
2819 }
2820
2821 // Get a list of leaf locality groups. A leaf lgroup is group that
2822 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2823 // board. An LWP is assigned to one of these groups upon creation.
2824 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2825 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2826 ids[0] = 0;
2827 return 1;
2828 }
2829 int result_size = 0, top = 1, bottom = 0, cur = 0;
2830 for (int k = 0; k < size; k++) {
2831 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2832 (Solaris::lgrp_id_t*)&ids[top], size - top);
2833 if (r == -1) {
2834 ids[0] = 0;
2835 return 1;
2836 }
2837 if (!r) {
2838 // That's a leaf node.
2839 assert (bottom <= cur, "Sanity check");
2840 // Check if the node has memory
2841 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2842 NULL, 0, LGRP_RSRC_MEM) > 0) {
2843 ids[bottom++] = ids[cur];
2844 }
2845 }
2846 top += r;
2847 cur++;
2848 }
2849 if (bottom == 0) {
2850 // Handle a situation, when the OS reports no memory available.
2851 // Assume UMA architecture.
2852 ids[0] = 0;
2853 return 1;
2854 }
2855 return bottom;
2856 }
2857
2858 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2859 bool os::numa_topology_changed() {
2860 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2861 if (is_stale != -1 && is_stale) {
2862 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2863 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2864 assert(c != 0, "Failure to initialize LGRP API");
2865 Solaris::set_lgrp_cookie(c);
2866 return true;
2867 }
2868 return false;
2869 }
2870
2871 // Get the group id of the current LWP.
2872 int os::numa_get_group_id() {
2873 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2874 if (lgrp_id == -1) {
2875 return 0;
2876 }
2877 const int size = os::numa_get_groups_num();
2878 int *ids = (int*)alloca(size * sizeof(int));
2879
2880 // Get the ids of all lgroups with memory; r is the count.
2881 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2882 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2883 if (r <= 0) {
2884 return 0;
2885 }
2886 return ids[os::random() % r];
2887 }
2888
2889 // Request information about the page.
2890 bool os::get_page_info(char *start, page_info* info) {
2891 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2892 uint64_t addr = (uintptr_t)start;
2893 uint64_t outdata[2];
2894 uint_t validity = 0;
2895
2896 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2897 return false;
2898 }
2899
2900 info->size = 0;
2901 info->lgrp_id = -1;
2902
2903 if ((validity & 1) != 0) {
2904 if ((validity & 2) != 0) {
2905 info->lgrp_id = outdata[0];
2906 }
2907 if ((validity & 4) != 0) {
2908 info->size = outdata[1];
2909 }
2910 return true;
2911 }
2912 return false;
2913 }
2914
2915 // Scan the pages from start to end until a page different than
2916 // the one described in the info parameter is encountered.
2917 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
2918 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2919 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2920 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1];
2921 uint_t validity[MAX_MEMINFO_CNT];
2922
2923 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2924 uint64_t p = (uint64_t)start;
2925 while (p < (uint64_t)end) {
2926 addrs[0] = p;
2927 size_t addrs_count = 1;
2928 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2929 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2930 addrs_count++;
2931 }
2932
2933 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2934 return NULL;
2935 }
2936
2937 size_t i = 0;
2938 for (; i < addrs_count; i++) {
2939 if ((validity[i] & 1) != 0) {
2940 if ((validity[i] & 4) != 0) {
2941 if (outdata[types * i + 1] != page_expected->size) {
2942 break;
2943 }
2944 } else
2945 if (page_expected->size != 0) {
2946 break;
2947 }
2948
2949 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2950 if (outdata[types * i] != page_expected->lgrp_id) {
2951 break;
2952 }
2953 }
2954 } else {
2955 return NULL;
2956 }
2957 }
2958
2959 if (i < addrs_count) {
2960 if ((validity[i] & 2) != 0) {
2961 page_found->lgrp_id = outdata[types * i];
2962 } else {
2963 page_found->lgrp_id = -1;
2964 }
2965 if ((validity[i] & 4) != 0) {
2966 page_found->size = outdata[types * i + 1];
2967 } else {
2968 page_found->size = 0;
2969 }
2970 return (char*)addrs[i];
2971 }
2972
2973 p = addrs[addrs_count - 1] + page_size;
2974 }
2975 return end;
2976 }
2977
2978 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2979 size_t size = bytes;
2980 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2981 // uncommitted page. Otherwise, the read/write might succeed if we
2982 // have enough swap space to back the physical page.
2983 return
2984 NULL != Solaris::mmap_chunk(addr, size,
2985 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2986 PROT_NONE);
2987 }
2988
2989 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2990 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2991
2992 if (b == MAP_FAILED) {
2993 return NULL;
2994 }
2995 return b;
2996 }
2997
2998 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) {
2999 char* addr = requested_addr;
3000 int flags = MAP_PRIVATE | MAP_NORESERVE;
3001
3002 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap");
3003
3004 if (fixed) {
3005 flags |= MAP_FIXED;
3006 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
3007 flags |= MAP_ALIGN;
3008 addr = (char*) alignment_hint;
3009 }
3010
3011 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3012 // uncommitted page. Otherwise, the read/write might succeed if we
3013 // have enough swap space to back the physical page.
3014 return mmap_chunk(addr, bytes, flags, PROT_NONE);
3015 }
3016
3017 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
3018 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL));
3019
3020 guarantee(requested_addr == NULL || requested_addr == addr,
3021 "OS failed to return requested mmap address.");
3022 return addr;
3023 }
3024
3025 // Reserve memory at an arbitrary address, only if that area is
3026 // available (and not reserved for something else).
3027
3028 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
3029 const int max_tries = 10;
3030 char* base[max_tries];
3031 size_t size[max_tries];
3032
3033 // Solaris adds a gap between mmap'ed regions. The size of the gap
3034 // is dependent on the requested size and the MMU. Our initial gap
3035 // value here is just a guess and will be corrected later.
3036 bool had_top_overlap = false;
3037 bool have_adjusted_gap = false;
3038 size_t gap = 0x400000;
3039
3040 // Assert only that the size is a multiple of the page size, since
3041 // that's all that mmap requires, and since that's all we really know
3042 // about at this low abstraction level. If we need higher alignment,
3043 // we can either pass an alignment to this method or verify alignment
3044 // in one of the methods further up the call chain. See bug 5044738.
3045 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
3046
3047 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
3048 // Give it a try, if the kernel honors the hint we can return immediately.
3049 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
3050
3051 volatile int err = errno;
3052 if (addr == requested_addr) {
3053 return addr;
3054 } else if (addr != NULL) {
3055 pd_unmap_memory(addr, bytes);
3056 }
3057
3058 if (PrintMiscellaneous && Verbose) {
3059 char buf[256];
3060 buf[0] = '\0';
3061 if (addr == NULL) {
3062 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
3063 }
3064 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
3065 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
3066 "%s", bytes, requested_addr, addr, buf);
3067 }
3068
3069 // Address hint method didn't work. Fall back to the old method.
3070 // In theory, once SNV becomes our oldest supported platform, this
3071 // code will no longer be needed.
3072 //
3073 // Repeatedly allocate blocks until the block is allocated at the
3074 // right spot. Give up after max_tries.
3075 int i;
3076 for (i = 0; i < max_tries; ++i) {
3077 base[i] = reserve_memory(bytes);
3078
3079 if (base[i] != NULL) {
3080 // Is this the block we wanted?
3081 if (base[i] == requested_addr) {
3082 size[i] = bytes;
3083 break;
3084 }
3085
3086 // check that the gap value is right
3087 if (had_top_overlap && !have_adjusted_gap) {
3088 size_t actual_gap = base[i-1] - base[i] - bytes;
3089 if (gap != actual_gap) {
3090 // adjust the gap value and retry the last 2 allocations
3091 assert(i > 0, "gap adjustment code problem");
3092 have_adjusted_gap = true; // adjust the gap only once, just in case
3093 gap = actual_gap;
3094 if (PrintMiscellaneous && Verbose) {
3095 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
3096 }
3097 unmap_memory(base[i], bytes);
3098 unmap_memory(base[i-1], size[i-1]);
3099 i-=2;
3100 continue;
3101 }
3102 }
3103
3104 // Does this overlap the block we wanted? Give back the overlapped
3105 // parts and try again.
3106 //
3107 // There is still a bug in this code: if top_overlap == bytes,
3108 // the overlap is offset from requested region by the value of gap.
3109 // In this case giving back the overlapped part will not work,
3110 // because we'll give back the entire block at base[i] and
3111 // therefore the subsequent allocation will not generate a new gap.
3112 // This could be fixed with a new algorithm that used larger
3113 // or variable size chunks to find the requested region -
3114 // but such a change would introduce additional complications.
3115 // It's rare enough that the planets align for this bug,
3116 // so we'll just wait for a fix for 6204603/5003415 which
3117 // will provide a mmap flag to allow us to avoid this business.
3118
3119 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
3120 if (top_overlap >= 0 && top_overlap < bytes) {
3121 had_top_overlap = true;
3122 unmap_memory(base[i], top_overlap);
3123 base[i] += top_overlap;
3124 size[i] = bytes - top_overlap;
3125 } else {
3126 size_t bottom_overlap = base[i] + bytes - requested_addr;
3127 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
3128 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
3129 warning("attempt_reserve_memory_at: possible alignment bug");
3130 }
3131 unmap_memory(requested_addr, bottom_overlap);
3132 size[i] = bytes - bottom_overlap;
3133 } else {
3134 size[i] = bytes;
3135 }
3136 }
3137 }
3138 }
3139
3140 // Give back the unused reserved pieces.
3141
3142 for (int j = 0; j < i; ++j) {
3143 if (base[j] != NULL) {
3144 unmap_memory(base[j], size[j]);
3145 }
3146 }
3147
3148 return (i < max_tries) ? requested_addr : NULL;
3149 }
3150
3151 bool os::pd_release_memory(char* addr, size_t bytes) {
3152 size_t size = bytes;
3153 return munmap(addr, size) == 0;
3154 }
3155
3156 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
3157 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
3158 "addr must be page aligned");
3159 int retVal = mprotect(addr, bytes, prot);
3160 return retVal == 0;
3161 }
3162
3163 // Protect memory (Used to pass readonly pages through
3164 // JNI GetArray<type>Elements with empty arrays.)
3165 // Also, used for serialization page and for compressed oops null pointer
3166 // checking.
3167 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3168 bool is_committed) {
3169 unsigned int p = 0;
3170 switch (prot) {
3171 case MEM_PROT_NONE: p = PROT_NONE; break;
3172 case MEM_PROT_READ: p = PROT_READ; break;
3173 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3174 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3175 default:
3176 ShouldNotReachHere();
3177 }
3178 // is_committed is unused.
3179 return solaris_mprotect(addr, bytes, p);
3180 }
3181
3182 // guard_memory and unguard_memory only happens within stack guard pages.
3183 // Since ISM pertains only to the heap, guard and unguard memory should not
3184 /// happen with an ISM region.
3185 bool os::guard_memory(char* addr, size_t bytes) {
3186 return solaris_mprotect(addr, bytes, PROT_NONE);
3187 }
3188
3189 bool os::unguard_memory(char* addr, size_t bytes) {
3190 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3191 }
3192
3193 // Large page support
3194 static size_t _large_page_size = 0;
3195
3196 // Insertion sort for small arrays (descending order).
3197 static void insertion_sort_descending(size_t* array, int len) {
3198 for (int i = 0; i < len; i++) {
3199 size_t val = array[i];
3200 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3201 size_t tmp = array[key];
3202 array[key] = array[key - 1];
3203 array[key - 1] = tmp;
3204 }
3205 }
3206 }
3207
3208 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) {
3209 const unsigned int usable_count = VM_Version::page_size_count();
3210 if (usable_count == 1) {
3211 return false;
3212 }
3213
3214 // Find the right getpagesizes interface. When solaris 11 is the minimum
3215 // build platform, getpagesizes() (without the '2') can be called directly.
3216 typedef int (*gps_t)(size_t[], int);
3217 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3218 if (gps_func == NULL) {
3219 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3220 if (gps_func == NULL) {
3221 if (warn) {
3222 warning("MPSS is not supported by the operating system.");
3223 }
3224 return false;
3225 }
3226 }
3227
3228 // Fill the array of page sizes.
3229 int n = (*gps_func)(_page_sizes, page_sizes_max);
3230 assert(n > 0, "Solaris bug?");
3231
3232 if (n == page_sizes_max) {
3233 // Add a sentinel value (necessary only if the array was completely filled
3234 // since it is static (zeroed at initialization)).
3235 _page_sizes[--n] = 0;
3236 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3237 }
3238 assert(_page_sizes[n] == 0, "missing sentinel");
3239 trace_page_sizes("available page sizes", _page_sizes, n);
3240
3241 if (n == 1) return false; // Only one page size available.
3242
3243 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3244 // select up to usable_count elements. First sort the array, find the first
3245 // acceptable value, then copy the usable sizes to the top of the array and
3246 // trim the rest. Make sure to include the default page size :-).
3247 //
3248 // A better policy could get rid of the 4M limit by taking the sizes of the
3249 // important VM memory regions (java heap and possibly the code cache) into
3250 // account.
3251 insertion_sort_descending(_page_sizes, n);
3252 const size_t size_limit =
3253 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3254 int beg;
3255 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
3256 const int end = MIN2((int)usable_count, n) - 1;
3257 for (int cur = 0; cur < end; ++cur, ++beg) {
3258 _page_sizes[cur] = _page_sizes[beg];
3259 }
3260 _page_sizes[end] = vm_page_size();
3261 _page_sizes[end + 1] = 0;
3262
3263 if (_page_sizes[end] > _page_sizes[end - 1]) {
3264 // Default page size is not the smallest; sort again.
3265 insertion_sort_descending(_page_sizes, end + 1);
3266 }
3267 *page_size = _page_sizes[0];
3268
3269 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3270 return true;
3271 }
3272
3273 void os::large_page_init() {
3274 if (UseLargePages) {
3275 // print a warning if any large page related flag is specified on command line
3276 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3277 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3278
3279 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3280 }
3281 }
3282
3283 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) {
3284 // Signal to OS that we want large pages for addresses
3285 // from addr, addr + bytes
3286 struct memcntl_mha mpss_struct;
3287 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3288 mpss_struct.mha_pagesize = align;
3289 mpss_struct.mha_flags = 0;
3290 // Upon successful completion, memcntl() returns 0
3291 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) {
3292 debug_only(warning("Attempt to use MPSS failed."));
3293 return false;
3294 }
3295 return true;
3296 }
3297
3298 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) {
3299 fatal("os::reserve_memory_special should not be called on Solaris.");
3300 return NULL;
3301 }
3302
3303 bool os::release_memory_special(char* base, size_t bytes) {
3304 fatal("os::release_memory_special should not be called on Solaris.");
3305 return false;
3306 }
3307
3308 size_t os::large_page_size() {
3309 return _large_page_size;
3310 }
3311
3312 // MPSS allows application to commit large page memory on demand; with ISM
3313 // the entire memory region must be allocated as shared memory.
3314 bool os::can_commit_large_page_memory() {
3315 return true;
3316 }
3317
3318 bool os::can_execute_large_page_memory() {
3319 return true;
3320 }
3321
3322 // Read calls from inside the vm need to perform state transitions
3323 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3324 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3325 }
3326
3327 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3328 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3329 }
3330
3331 void os::naked_short_sleep(jlong ms) {
3332 assert(ms < 1000, "Un-interruptable sleep, short time use only");
3333
3334 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but
3335 // Solaris requires -lrt for this.
3336 usleep((ms * 1000));
3337
3338 return;
3339 }
3340
3341 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3342 void os::infinite_sleep() {
3343 while (true) { // sleep forever ...
3344 ::sleep(100); // ... 100 seconds at a time
3345 }
3346 }
3347
3348 // Used to convert frequent JVM_Yield() to nops
3349 bool os::dont_yield() {
3350 if (DontYieldALot) {
3351 static hrtime_t last_time = 0;
3352 hrtime_t diff = getTimeNanos() - last_time;
3353
3354 if (diff < DontYieldALotInterval * 1000000)
3355 return true;
3356
3357 last_time += diff;
3358
3359 return false;
3360 }
3361 else {
3362 return false;
3363 }
3364 }
3365
3366 // Caveat: Solaris os::yield() causes a thread-state transition whereas
3367 // the linux and win32 implementations do not. This should be checked.
3368
3369 void os::yield() {
3370 // Yields to all threads with same or greater priority
3371 os::sleep(Thread::current(), 0, false);
3372 }
3373
3374 // Note that yield semantics are defined by the scheduling class to which
3375 // the thread currently belongs. Typically, yield will _not yield to
3376 // other equal or higher priority threads that reside on the dispatch queues
3377 // of other CPUs.
3378
3379 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
3380
3381
3382 // On Solaris we found that yield_all doesn't always yield to all other threads.
3383 // There have been cases where there is a thread ready to execute but it doesn't
3384 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
3385 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a
3386 // SIGWAITING signal which will cause a new lwp to be created. So we count the
3387 // number of times yield_all is called in the one loop and increase the sleep
3388 // time after 8 attempts. If this fails too we increase the concurrency level
3389 // so that the starving thread would get an lwp
3390
3391 void os::yield_all(int attempts) {
3392 // Yields to all threads, including threads with lower priorities
3393 if (attempts == 0) {
3394 os::sleep(Thread::current(), 1, false);
3395 } else {
3396 int iterations = attempts % 30;
3397 if (iterations == 0 && !os::Solaris::T2_libthread()) {
3398 // thr_setconcurrency and _getconcurrency make sense only under T1.
3399 int noofLWPS = thr_getconcurrency();
3400 if (noofLWPS < (Threads::number_of_threads() + 2)) {
3401 thr_setconcurrency(thr_getconcurrency() + 1);
3402 }
3403 } else if (iterations < 25) {
3404 os::sleep(Thread::current(), 1, false);
3405 } else {
3406 os::sleep(Thread::current(), 10, false);
3407 }
3408 }
3409 }
3410
3411 // Called from the tight loops to possibly influence time-sharing heuristics
3412 void os::loop_breaker(int attempts) {
3413 os::yield_all(attempts);
3414 }
3415
3416
3417 // Interface for setting lwp priorities. If we are using T2 libthread,
3418 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3419 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3420 // function is meaningless in this mode so we must adjust the real lwp's priority
3421 // The routines below implement the getting and setting of lwp priorities.
3422 //
3423 // Note: There are three priority scales used on Solaris. Java priotities
3424 // which range from 1 to 10, libthread "thr_setprio" scale which range
3425 // from 0 to 127, and the current scheduling class of the process we
3426 // are running in. This is typically from -60 to +60.
3427 // The setting of the lwp priorities in done after a call to thr_setprio
3428 // so Java priorities are mapped to libthread priorities and we map from
3429 // the latter to lwp priorities. We don't keep priorities stored in
3430 // Java priorities since some of our worker threads want to set priorities
3431 // higher than all Java threads.
3432 //
3433 // For related information:
3434 // (1) man -s 2 priocntl
3435 // (2) man -s 4 priocntl
3436 // (3) man dispadmin
3437 // = librt.so
3438 // = libthread/common/rtsched.c - thrp_setlwpprio().
3439 // = ps -cL <pid> ... to validate priority.
3440 // = sched_get_priority_min and _max
3441 // pthread_create
3442 // sched_setparam
3443 // pthread_setschedparam
3444 //
3445 // Assumptions:
3446 // + We assume that all threads in the process belong to the same
3447 // scheduling class. IE. an homogenous process.
3448 // + Must be root or in IA group to change change "interactive" attribute.
3449 // Priocntl() will fail silently. The only indication of failure is when
3450 // we read-back the value and notice that it hasn't changed.
3451 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3452 // + For RT, change timeslice as well. Invariant:
3453 // constant "priority integral"
3454 // Konst == TimeSlice * (60-Priority)
3455 // Given a priority, compute appropriate timeslice.
3456 // + Higher numerical values have higher priority.
3457
3458 // sched class attributes
3459 typedef struct {
3460 int schedPolicy; // classID
3461 int maxPrio;
3462 int minPrio;
3463 } SchedInfo;
3464
3465
3466 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3467
3468 #ifdef ASSERT
3469 static int ReadBackValidate = 1;
3470 #endif
3471 static int myClass = 0;
3472 static int myMin = 0;
3473 static int myMax = 0;
3474 static int myCur = 0;
3475 static bool priocntl_enable = false;
3476
3477 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3478 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3479
3480
3481 // lwp_priocntl_init
3482 //
3483 // Try to determine the priority scale for our process.
3484 //
3485 // Return errno or 0 if OK.
3486 //
3487 static int lwp_priocntl_init () {
3488 int rslt;
3489 pcinfo_t ClassInfo;
3490 pcparms_t ParmInfo;
3491 int i;
3492
3493 if (!UseThreadPriorities) return 0;
3494
3495 // We are using Bound threads, we need to determine our priority ranges
3496 if (os::Solaris::T2_libthread() || UseBoundThreads) {
3497 // If ThreadPriorityPolicy is 1, switch tables
3498 if (ThreadPriorityPolicy == 1) {
3499 for (i = 0 ; i < CriticalPriority+1; i++)
3500 os::java_to_os_priority[i] = prio_policy1[i];
3501 }
3502 if (UseCriticalJavaThreadPriority) {
3503 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3504 // See set_native_priority() and set_lwp_class_and_priority().
3505 // Save original MaxPriority mapping in case attempt to
3506 // use critical priority fails.
3507 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3508 // Set negative to distinguish from other priorities
3509 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3510 }
3511 }
3512 // Not using Bound Threads, set to ThreadPolicy 1
3513 else {
3514 for ( i = 0 ; i < CriticalPriority+1; i++ ) {
3515 os::java_to_os_priority[i] = prio_policy1[i];
3516 }
3517 return 0;
3518 }
3519
3520 // Get IDs for a set of well-known scheduling classes.
3521 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3522 // the system. We should have a loop that iterates over the
3523 // classID values, which are known to be "small" integers.
3524
3525 strcpy(ClassInfo.pc_clname, "TS");
3526 ClassInfo.pc_cid = -1;
3527 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3528 if (rslt < 0) return errno;
3529 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3530 tsLimits.schedPolicy = ClassInfo.pc_cid;
3531 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3532 tsLimits.minPrio = -tsLimits.maxPrio;
3533
3534 strcpy(ClassInfo.pc_clname, "IA");
3535 ClassInfo.pc_cid = -1;
3536 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3537 if (rslt < 0) return errno;
3538 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3539 iaLimits.schedPolicy = ClassInfo.pc_cid;
3540 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3541 iaLimits.minPrio = -iaLimits.maxPrio;
3542
3543 strcpy(ClassInfo.pc_clname, "RT");
3544 ClassInfo.pc_cid = -1;
3545 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3546 if (rslt < 0) return errno;
3547 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3548 rtLimits.schedPolicy = ClassInfo.pc_cid;
3549 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3550 rtLimits.minPrio = 0;
3551
3552 strcpy(ClassInfo.pc_clname, "FX");
3553 ClassInfo.pc_cid = -1;
3554 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3555 if (rslt < 0) return errno;
3556 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3557 fxLimits.schedPolicy = ClassInfo.pc_cid;
3558 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3559 fxLimits.minPrio = 0;
3560
3561 // Query our "current" scheduling class.
3562 // This will normally be IA, TS or, rarely, FX or RT.
3563 memset(&ParmInfo, 0, sizeof(ParmInfo));
3564 ParmInfo.pc_cid = PC_CLNULL;
3565 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3566 if (rslt < 0) return errno;
3567 myClass = ParmInfo.pc_cid;
3568
3569 // We now know our scheduling classId, get specific information
3570 // about the class.
3571 ClassInfo.pc_cid = myClass;
3572 ClassInfo.pc_clname[0] = 0;
3573 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3574 if (rslt < 0) return errno;
3575
3576 if (ThreadPriorityVerbose) {
3577 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3578 }
3579
3580 memset(&ParmInfo, 0, sizeof(pcparms_t));
3581 ParmInfo.pc_cid = PC_CLNULL;
3582 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3583 if (rslt < 0) return errno;
3584
3585 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3586 myMin = rtLimits.minPrio;
3587 myMax = rtLimits.maxPrio;
3588 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3589 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3590 myMin = iaLimits.minPrio;
3591 myMax = iaLimits.maxPrio;
3592 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3593 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3594 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3595 myMin = tsLimits.minPrio;
3596 myMax = tsLimits.maxPrio;
3597 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3598 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3599 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3600 myMin = fxLimits.minPrio;
3601 myMax = fxLimits.maxPrio;
3602 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3603 } else {
3604 // No clue - punt
3605 if (ThreadPriorityVerbose)
3606 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
3607 return EINVAL; // no clue, punt
3608 }
3609
3610 if (ThreadPriorityVerbose) {
3611 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
3612 }
3613
3614 priocntl_enable = true; // Enable changing priorities
3615 return 0;
3616 }
3617
3618 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3619 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3620 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3621 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3622
3623
3624 // scale_to_lwp_priority
3625 //
3626 // Convert from the libthread "thr_setprio" scale to our current
3627 // lwp scheduling class scale.
3628 //
3629 static
3630 int scale_to_lwp_priority (int rMin, int rMax, int x)
3631 {
3632 int v;
3633
3634 if (x == 127) return rMax; // avoid round-down
3635 v = (((x*(rMax-rMin)))/128)+rMin;
3636 return v;
3637 }
3638
3639
3640 // set_lwp_class_and_priority
3641 //
3642 // Set the class and priority of the lwp. This call should only
3643 // be made when using bound threads (T2 threads are bound by default).
3644 //
3645 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3646 int newPrio, int new_class, bool scale) {
3647 int rslt;
3648 int Actual, Expected, prv;
3649 pcparms_t ParmInfo; // for GET-SET
3650 #ifdef ASSERT
3651 pcparms_t ReadBack; // for readback
3652 #endif
3653
3654 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3655 // Query current values.
3656 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3657 // Cache "pcparms_t" in global ParmCache.
3658 // TODO: elide set-to-same-value
3659
3660 // If something went wrong on init, don't change priorities.
3661 if ( !priocntl_enable ) {
3662 if (ThreadPriorityVerbose)
3663 tty->print_cr("Trying to set priority but init failed, ignoring");
3664 return EINVAL;
3665 }
3666
3667 // If lwp hasn't started yet, just return
3668 // the _start routine will call us again.
3669 if ( lwpid <= 0 ) {
3670 if (ThreadPriorityVerbose) {
3671 tty->print_cr ("deferring the set_lwp_class_and_priority of thread "
3672 INTPTR_FORMAT " to %d, lwpid not set",
3673 ThreadID, newPrio);
3674 }
3675 return 0;
3676 }
3677
3678 if (ThreadPriorityVerbose) {
3679 tty->print_cr ("set_lwp_class_and_priority("
3680 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3681 ThreadID, lwpid, newPrio);
3682 }
3683
3684 memset(&ParmInfo, 0, sizeof(pcparms_t));
3685 ParmInfo.pc_cid = PC_CLNULL;
3686 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3687 if (rslt < 0) return errno;
3688
3689 int cur_class = ParmInfo.pc_cid;
3690 ParmInfo.pc_cid = (id_t)new_class;
3691
3692 if (new_class == rtLimits.schedPolicy) {
3693 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3694 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3695 rtLimits.maxPrio, newPrio)
3696 : newPrio;
3697 rtInfo->rt_tqsecs = RT_NOCHANGE;
3698 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3699 if (ThreadPriorityVerbose) {
3700 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3701 }
3702 } else if (new_class == iaLimits.schedPolicy) {
3703 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3704 int maxClamped = MIN2(iaLimits.maxPrio,
3705 cur_class == new_class
3706 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3707 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3708 maxClamped, newPrio)
3709 : newPrio;
3710 iaInfo->ia_uprilim = cur_class == new_class
3711 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3712 iaInfo->ia_mode = IA_NOCHANGE;
3713 if (ThreadPriorityVerbose) {
3714 tty->print_cr("IA: [%d...%d] %d->%d\n",
3715 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3716 }
3717 } else if (new_class == tsLimits.schedPolicy) {
3718 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3719 int maxClamped = MIN2(tsLimits.maxPrio,
3720 cur_class == new_class
3721 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3722 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3723 maxClamped, newPrio)
3724 : newPrio;
3725 tsInfo->ts_uprilim = cur_class == new_class
3726 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3727 if (ThreadPriorityVerbose) {
3728 tty->print_cr("TS: [%d...%d] %d->%d\n",
3729 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3730 }
3731 } else if (new_class == fxLimits.schedPolicy) {
3732 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3733 int maxClamped = MIN2(fxLimits.maxPrio,
3734 cur_class == new_class
3735 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3736 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3737 maxClamped, newPrio)
3738 : newPrio;
3739 fxInfo->fx_uprilim = cur_class == new_class
3740 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
3741 fxInfo->fx_tqsecs = FX_NOCHANGE;
3742 fxInfo->fx_tqnsecs = FX_NOCHANGE;
3743 if (ThreadPriorityVerbose) {
3744 tty->print_cr("FX: [%d...%d] %d->%d\n",
3745 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
3746 }
3747 } else {
3748 if (ThreadPriorityVerbose) {
3749 tty->print_cr("Unknown new scheduling class %d\n", new_class);
3750 }
3751 return EINVAL; // no clue, punt
3752 }
3753
3754 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3755 if (ThreadPriorityVerbose && rslt) {
3756 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3757 }
3758 if (rslt < 0) return errno;
3759
3760 #ifdef ASSERT
3761 // Sanity check: read back what we just attempted to set.
3762 // In theory it could have changed in the interim ...
3763 //
3764 // The priocntl system call is tricky.
3765 // Sometimes it'll validate the priority value argument and
3766 // return EINVAL if unhappy. At other times it fails silently.
3767 // Readbacks are prudent.
3768
3769 if (!ReadBackValidate) return 0;
3770
3771 memset(&ReadBack, 0, sizeof(pcparms_t));
3772 ReadBack.pc_cid = PC_CLNULL;
3773 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3774 assert(rslt >= 0, "priocntl failed");
3775 Actual = Expected = 0xBAD;
3776 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3777 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3778 Actual = RTPRI(ReadBack)->rt_pri;
3779 Expected = RTPRI(ParmInfo)->rt_pri;
3780 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3781 Actual = IAPRI(ReadBack)->ia_upri;
3782 Expected = IAPRI(ParmInfo)->ia_upri;
3783 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3784 Actual = TSPRI(ReadBack)->ts_upri;
3785 Expected = TSPRI(ParmInfo)->ts_upri;
3786 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3787 Actual = FXPRI(ReadBack)->fx_upri;
3788 Expected = FXPRI(ParmInfo)->fx_upri;
3789 } else {
3790 if (ThreadPriorityVerbose) {
3791 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
3792 ParmInfo.pc_cid);
3793 }
3794 }
3795
3796 if (Actual != Expected) {
3797 if (ThreadPriorityVerbose) {
3798 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3799 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3800 }
3801 }
3802 #endif
3803
3804 return 0;
3805 }
3806
3807 // Solaris only gives access to 128 real priorities at a time,
3808 // so we expand Java's ten to fill this range. This would be better
3809 // if we dynamically adjusted relative priorities.
3810 //
3811 // The ThreadPriorityPolicy option allows us to select 2 different
3812 // priority scales.
3813 //
3814 // ThreadPriorityPolicy=0
3815 // Since the Solaris' default priority is MaximumPriority, we do not
3816 // set a priority lower than Max unless a priority lower than
3817 // NormPriority is requested.
3818 //
3819 // ThreadPriorityPolicy=1
3820 // This mode causes the priority table to get filled with
3821 // linear values. NormPriority get's mapped to 50% of the
3822 // Maximum priority an so on. This will cause VM threads
3823 // to get unfair treatment against other Solaris processes
3824 // which do not explicitly alter their thread priorities.
3825 //
3826
3827 int os::java_to_os_priority[CriticalPriority + 1] = {
3828 -99999, // 0 Entry should never be used
3829
3830 0, // 1 MinPriority
3831 32, // 2
3832 64, // 3
3833
3834 96, // 4
3835 127, // 5 NormPriority
3836 127, // 6
3837
3838 127, // 7
3839 127, // 8
3840 127, // 9 NearMaxPriority
3841
3842 127, // 10 MaxPriority
3843
3844 -criticalPrio // 11 CriticalPriority
3845 };
3846
3847 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3848 OSThread* osthread = thread->osthread();
3849
3850 // Save requested priority in case the thread hasn't been started
3851 osthread->set_native_priority(newpri);
3852
3853 // Check for critical priority request
3854 bool fxcritical = false;
3855 if (newpri == -criticalPrio) {
3856 fxcritical = true;
3857 newpri = criticalPrio;
3858 }
3859
3860 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3861 if (!UseThreadPriorities) return OS_OK;
3862
3863 int status = 0;
3864
3865 if (!fxcritical) {
3866 // Use thr_setprio only if we have a priority that thr_setprio understands
3867 status = thr_setprio(thread->osthread()->thread_id(), newpri);
3868 }
3869
3870 if (os::Solaris::T2_libthread() ||
3871 (UseBoundThreads && osthread->is_vm_created())) {
3872 int lwp_status =
3873 set_lwp_class_and_priority(osthread->thread_id(),
3874 osthread->lwp_id(),
3875 newpri,
3876 fxcritical ? fxLimits.schedPolicy : myClass,
3877 !fxcritical);
3878 if (lwp_status != 0 && fxcritical) {
3879 // Try again, this time without changing the scheduling class
3880 newpri = java_MaxPriority_to_os_priority;
3881 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
3882 osthread->lwp_id(),
3883 newpri, myClass, false);
3884 }
3885 status |= lwp_status;
3886 }
3887 return (status == 0) ? OS_OK : OS_ERR;
3888 }
3889
3890
3891 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
3892 int p;
3893 if ( !UseThreadPriorities ) {
3894 *priority_ptr = NormalPriority;
3895 return OS_OK;
3896 }
3897 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3898 if (status != 0) {
3899 return OS_ERR;
3900 }
3901 *priority_ptr = p;
3902 return OS_OK;
3903 }
3904
3905
3906 // Hint to the underlying OS that a task switch would not be good.
3907 // Void return because it's a hint and can fail.
3908 void os::hint_no_preempt() {
3909 schedctl_start(schedctl_init());
3910 }
3911
3912 static void resume_clear_context(OSThread *osthread) {
3913 osthread->set_ucontext(NULL);
3914 }
3915
3916 static void suspend_save_context(OSThread *osthread, ucontext_t* context) {
3917 osthread->set_ucontext(context);
3918 }
3919
3920 static Semaphore sr_semaphore;
3921
3922 void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) {
3923 // Save and restore errno to avoid confusing native code with EINTR
3924 // after sigsuspend.
3925 int old_errno = errno;
3926
3927 OSThread* osthread = thread->osthread();
3928 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
3929
3930 os::SuspendResume::State current = osthread->sr.state();
3931 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
3932 suspend_save_context(osthread, uc);
3933
3934 // attempt to switch the state, we assume we had a SUSPEND_REQUEST
3935 os::SuspendResume::State state = osthread->sr.suspended();
3936 if (state == os::SuspendResume::SR_SUSPENDED) {
3937 sigset_t suspend_set; // signals for sigsuspend()
3938
3939 // get current set of blocked signals and unblock resume signal
3940 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set);
3941 sigdelset(&suspend_set, os::Solaris::SIGasync());
3942
3943 sr_semaphore.signal();
3944 // wait here until we are resumed
3945 while (1) {
3946 sigsuspend(&suspend_set);
3947
3948 os::SuspendResume::State result = osthread->sr.running();
3949 if (result == os::SuspendResume::SR_RUNNING) {
3950 sr_semaphore.signal();
3951 break;
3952 }
3953 }
3954
3955 } else if (state == os::SuspendResume::SR_RUNNING) {
3956 // request was cancelled, continue
3957 } else {
3958 ShouldNotReachHere();
3959 }
3960
3961 resume_clear_context(osthread);
3962 } else if (current == os::SuspendResume::SR_RUNNING) {
3963 // request was cancelled, continue
3964 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
3965 // ignore
3966 } else {
3967 // ignore
3968 }
3969
3970 errno = old_errno;
3971 }
3972
3973 void os::print_statistics() {
3974 }
3975
3976 int os::message_box(const char* title, const char* message) {
3977 int i;
3978 fdStream err(defaultStream::error_fd());
3979 for (i = 0; i < 78; i++) err.print_raw("=");
3980 err.cr();
3981 err.print_raw_cr(title);
3982 for (i = 0; i < 78; i++) err.print_raw("-");
3983 err.cr();
3984 err.print_raw_cr(message);
3985 for (i = 0; i < 78; i++) err.print_raw("=");
3986 err.cr();
3987
3988 char buf[16];
3989 // Prevent process from exiting upon "read error" without consuming all CPU
3990 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3991
3992 return buf[0] == 'y' || buf[0] == 'Y';
3993 }
3994
3995 static int sr_notify(OSThread* osthread) {
3996 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync());
3997 assert_status(status == 0, status, "thr_kill");
3998 return status;
3999 }
4000
4001 // "Randomly" selected value for how long we want to spin
4002 // before bailing out on suspending a thread, also how often
4003 // we send a signal to a thread we want to resume
4004 static const int RANDOMLY_LARGE_INTEGER = 1000000;
4005 static const int RANDOMLY_LARGE_INTEGER2 = 100;
4006
4007 static bool do_suspend(OSThread* osthread) {
4008 assert(osthread->sr.is_running(), "thread should be running");
4009 assert(!sr_semaphore.trywait(), "semaphore has invalid state");
4010
4011 // mark as suspended and send signal
4012 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
4013 // failed to switch, state wasn't running?
4014 ShouldNotReachHere();
4015 return false;
4016 }
4017
4018 if (sr_notify(osthread) != 0) {
4019 ShouldNotReachHere();
4020 }
4021
4022 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
4023 while (true) {
4024 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) {
4025 break;
4026 } else {
4027 // timeout
4028 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
4029 if (cancelled == os::SuspendResume::SR_RUNNING) {
4030 return false;
4031 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
4032 // make sure that we consume the signal on the semaphore as well
4033 sr_semaphore.wait();
4034 break;
4035 } else {
4036 ShouldNotReachHere();
4037 return false;
4038 }
4039 }
4040 }
4041
4042 guarantee(osthread->sr.is_suspended(), "Must be suspended");
4043 return true;
4044 }
4045
4046 static void do_resume(OSThread* osthread) {
4047 assert(osthread->sr.is_suspended(), "thread should be suspended");
4048 assert(!sr_semaphore.trywait(), "invalid semaphore state");
4049
4050 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
4051 // failed to switch to WAKEUP_REQUEST
4052 ShouldNotReachHere();
4053 return;
4054 }
4055
4056 while (true) {
4057 if (sr_notify(osthread) == 0) {
4058 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) {
4059 if (osthread->sr.is_running()) {
4060 return;
4061 }
4062 }
4063 } else {
4064 ShouldNotReachHere();
4065 }
4066 }
4067
4068 guarantee(osthread->sr.is_running(), "Must be running!");
4069 }
4070
4071 void os::SuspendedThreadTask::internal_do_task() {
4072 if (do_suspend(_thread->osthread())) {
4073 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
4074 do_task(context);
4075 do_resume(_thread->osthread());
4076 }
4077 }
4078
4079 class PcFetcher : public os::SuspendedThreadTask {
4080 public:
4081 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {}
4082 ExtendedPC result();
4083 protected:
4084 void do_task(const os::SuspendedThreadTaskContext& context);
4085 private:
4086 ExtendedPC _epc;
4087 };
4088
4089 ExtendedPC PcFetcher::result() {
4090 guarantee(is_done(), "task is not done yet.");
4091 return _epc;
4092 }
4093
4094 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) {
4095 Thread* thread = context.thread();
4096 OSThread* osthread = thread->osthread();
4097 if (osthread->ucontext() != NULL) {
4098 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext());
4099 } else {
4100 // NULL context is unexpected, double-check this is the VMThread
4101 guarantee(thread->is_VM_thread(), "can only be called for VMThread");
4102 }
4103 }
4104
4105 // A lightweight implementation that does not suspend the target thread and
4106 // thus returns only a hint. Used for profiling only!
4107 ExtendedPC os::get_thread_pc(Thread* thread) {
4108 // Make sure that it is called by the watcher and the Threads lock is owned.
4109 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
4110 // For now, is only used to profile the VM Thread
4111 assert(thread->is_VM_thread(), "Can only be called for VMThread");
4112 PcFetcher fetcher(thread);
4113 fetcher.run();
4114 return fetcher.result();
4115 }
4116
4117
4118 // This does not do anything on Solaris. This is basically a hook for being
4119 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
4120 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
4121 f(value, method, args, thread);
4122 }
4123
4124 // This routine may be used by user applications as a "hook" to catch signals.
4125 // The user-defined signal handler must pass unrecognized signals to this
4126 // routine, and if it returns true (non-zero), then the signal handler must
4127 // return immediately. If the flag "abort_if_unrecognized" is true, then this
4128 // routine will never retun false (zero), but instead will execute a VM panic
4129 // routine kill the process.
4130 //
4131 // If this routine returns false, it is OK to call it again. This allows
4132 // the user-defined signal handler to perform checks either before or after
4133 // the VM performs its own checks. Naturally, the user code would be making
4134 // a serious error if it tried to handle an exception (such as a null check
4135 // or breakpoint) that the VM was generating for its own correct operation.
4136 //
4137 // This routine may recognize any of the following kinds of signals:
4138 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
4139 // os::Solaris::SIGasync
4140 // It should be consulted by handlers for any of those signals.
4141 // It explicitly does not recognize os::Solaris::SIGinterrupt
4142 //
4143 // The caller of this routine must pass in the three arguments supplied
4144 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
4145 // field of the structure passed to sigaction(). This routine assumes that
4146 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
4147 //
4148 // Note that the VM will print warnings if it detects conflicting signal
4149 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
4150 //
4151 extern "C" JNIEXPORT int
4152 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext,
4153 int abort_if_unrecognized);
4154
4155
4156 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
4157 int orig_errno = errno; // Preserve errno value over signal handler.
4158 JVM_handle_solaris_signal(sig, info, ucVoid, true);
4159 errno = orig_errno;
4160 }
4161
4162 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
4163 is needed to provoke threads blocked on IO to return an EINTR
4164 Note: this explicitly does NOT call JVM_handle_solaris_signal and
4165 does NOT participate in signal chaining due to requirement for
4166 NOT setting SA_RESTART to make EINTR work. */
4167 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
4168 if (UseSignalChaining) {
4169 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
4170 if (actp && actp->sa_handler) {
4171 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
4172 }
4173 }
4174 }
4175
4176 // This boolean allows users to forward their own non-matching signals
4177 // to JVM_handle_solaris_signal, harmlessly.
4178 bool os::Solaris::signal_handlers_are_installed = false;
4179
4180 // For signal-chaining
4181 bool os::Solaris::libjsig_is_loaded = false;
4182 typedef struct sigaction *(*get_signal_t)(int);
4183 get_signal_t os::Solaris::get_signal_action = NULL;
4184
4185 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
4186 struct sigaction *actp = NULL;
4187
4188 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
4189 // Retrieve the old signal handler from libjsig
4190 actp = (*get_signal_action)(sig);
4191 }
4192 if (actp == NULL) {
4193 // Retrieve the preinstalled signal handler from jvm
4194 actp = get_preinstalled_handler(sig);
4195 }
4196
4197 return actp;
4198 }
4199
4200 static bool call_chained_handler(struct sigaction *actp, int sig,
4201 siginfo_t *siginfo, void *context) {
4202 // Call the old signal handler
4203 if (actp->sa_handler == SIG_DFL) {
4204 // It's more reasonable to let jvm treat it as an unexpected exception
4205 // instead of taking the default action.
4206 return false;
4207 } else if (actp->sa_handler != SIG_IGN) {
4208 if ((actp->sa_flags & SA_NODEFER) == 0) {
4209 // automaticlly block the signal
4210 sigaddset(&(actp->sa_mask), sig);
4211 }
4212
4213 sa_handler_t hand;
4214 sa_sigaction_t sa;
4215 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4216 // retrieve the chained handler
4217 if (siginfo_flag_set) {
4218 sa = actp->sa_sigaction;
4219 } else {
4220 hand = actp->sa_handler;
4221 }
4222
4223 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4224 actp->sa_handler = SIG_DFL;
4225 }
4226
4227 // try to honor the signal mask
4228 sigset_t oset;
4229 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4230
4231 // call into the chained handler
4232 if (siginfo_flag_set) {
4233 (*sa)(sig, siginfo, context);
4234 } else {
4235 (*hand)(sig);
4236 }
4237
4238 // restore the signal mask
4239 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4240 }
4241 // Tell jvm's signal handler the signal is taken care of.
4242 return true;
4243 }
4244
4245 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4246 bool chained = false;
4247 // signal-chaining
4248 if (UseSignalChaining) {
4249 struct sigaction *actp = get_chained_signal_action(sig);
4250 if (actp != NULL) {
4251 chained = call_chained_handler(actp, sig, siginfo, context);
4252 }
4253 }
4254 return chained;
4255 }
4256
4257 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4258 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4259 if (preinstalled_sigs[sig] != 0) {
4260 return &chainedsigactions[sig];
4261 }
4262 return NULL;
4263 }
4264
4265 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
4266
4267 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4268 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4269 chainedsigactions[sig] = oldAct;
4270 preinstalled_sigs[sig] = 1;
4271 }
4272
4273 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
4274 // Check for overwrite.
4275 struct sigaction oldAct;
4276 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4277 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4278 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4279 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4280 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4281 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4282 if (AllowUserSignalHandlers || !set_installed) {
4283 // Do not overwrite; user takes responsibility to forward to us.
4284 return;
4285 } else if (UseSignalChaining) {
4286 if (oktochain) {
4287 // save the old handler in jvm
4288 save_preinstalled_handler(sig, oldAct);
4289 } else {
4290 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4291 }
4292 // libjsig also interposes the sigaction() call below and saves the
4293 // old sigaction on it own.
4294 } else {
4295 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4296 "%#lx for signal %d.", (long)oldhand, sig));
4297 }
4298 }
4299
4300 struct sigaction sigAct;
4301 sigfillset(&(sigAct.sa_mask));
4302 sigAct.sa_handler = SIG_DFL;
4303
4304 sigAct.sa_sigaction = signalHandler;
4305 // Handle SIGSEGV on alternate signal stack if
4306 // not using stack banging
4307 if (!UseStackBanging && sig == SIGSEGV) {
4308 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4309 // Interruptible i/o requires SA_RESTART cleared so EINTR
4310 // is returned instead of restarting system calls
4311 } else if (sig == os::Solaris::SIGinterrupt()) {
4312 sigemptyset(&sigAct.sa_mask);
4313 sigAct.sa_handler = NULL;
4314 sigAct.sa_flags = SA_SIGINFO;
4315 sigAct.sa_sigaction = sigINTRHandler;
4316 } else {
4317 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4318 }
4319 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4320
4321 sigaction(sig, &sigAct, &oldAct);
4322
4323 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4324 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4325 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4326 }
4327
4328
4329 #define DO_SIGNAL_CHECK(sig) \
4330 if (!sigismember(&check_signal_done, sig)) \
4331 os::Solaris::check_signal_handler(sig)
4332
4333 // This method is a periodic task to check for misbehaving JNI applications
4334 // under CheckJNI, we can add any periodic checks here
4335
4336 void os::run_periodic_checks() {
4337 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4338 // thereby preventing a NULL checks.
4339 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
4340
4341 if (check_signals == false) return;
4342
4343 // SEGV and BUS if overridden could potentially prevent
4344 // generation of hs*.log in the event of a crash, debugging
4345 // such a case can be very challenging, so we absolutely
4346 // check for the following for a good measure:
4347 DO_SIGNAL_CHECK(SIGSEGV);
4348 DO_SIGNAL_CHECK(SIGILL);
4349 DO_SIGNAL_CHECK(SIGFPE);
4350 DO_SIGNAL_CHECK(SIGBUS);
4351 DO_SIGNAL_CHECK(SIGPIPE);
4352 DO_SIGNAL_CHECK(SIGXFSZ);
4353
4354 // ReduceSignalUsage allows the user to override these handlers
4355 // see comments at the very top and jvm_solaris.h
4356 if (!ReduceSignalUsage) {
4357 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4358 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4359 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4360 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4361 }
4362
4363 // See comments above for using JVM1/JVM2 and UseAltSigs
4364 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4365 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4366
4367 }
4368
4369 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4370
4371 static os_sigaction_t os_sigaction = NULL;
4372
4373 void os::Solaris::check_signal_handler(int sig) {
4374 char buf[O_BUFLEN];
4375 address jvmHandler = NULL;
4376
4377 struct sigaction act;
4378 if (os_sigaction == NULL) {
4379 // only trust the default sigaction, in case it has been interposed
4380 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4381 if (os_sigaction == NULL) return;
4382 }
4383
4384 os_sigaction(sig, (struct sigaction*)NULL, &act);
4385
4386 address thisHandler = (act.sa_flags & SA_SIGINFO)
4387 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4388 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
4389
4390
4391 switch(sig) {
4392 case SIGSEGV:
4393 case SIGBUS:
4394 case SIGFPE:
4395 case SIGPIPE:
4396 case SIGXFSZ:
4397 case SIGILL:
4398 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4399 break;
4400
4401 case SHUTDOWN1_SIGNAL:
4402 case SHUTDOWN2_SIGNAL:
4403 case SHUTDOWN3_SIGNAL:
4404 case BREAK_SIGNAL:
4405 jvmHandler = (address)user_handler();
4406 break;
4407
4408 default:
4409 int intrsig = os::Solaris::SIGinterrupt();
4410 int asynsig = os::Solaris::SIGasync();
4411
4412 if (sig == intrsig) {
4413 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4414 } else if (sig == asynsig) {
4415 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4416 } else {
4417 return;
4418 }
4419 break;
4420 }
4421
4422
4423 if (thisHandler != jvmHandler) {
4424 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4425 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4426 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4427 // No need to check this sig any longer
4428 sigaddset(&check_signal_done, sig);
4429 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4430 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4431 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4432 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4433 // No need to check this sig any longer
4434 sigaddset(&check_signal_done, sig);
4435 }
4436
4437 // Print all the signal handler state
4438 if (sigismember(&check_signal_done, sig)) {
4439 print_signal_handlers(tty, buf, O_BUFLEN);
4440 }
4441
4442 }
4443
4444 void os::Solaris::install_signal_handlers() {
4445 bool libjsigdone = false;
4446 signal_handlers_are_installed = true;
4447
4448 // signal-chaining
4449 typedef void (*signal_setting_t)();
4450 signal_setting_t begin_signal_setting = NULL;
4451 signal_setting_t end_signal_setting = NULL;
4452 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4453 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4454 if (begin_signal_setting != NULL) {
4455 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4456 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4457 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4458 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4459 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4460 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4461 libjsig_is_loaded = true;
4462 if (os::Solaris::get_libjsig_version != NULL) {
4463 libjsigversion = (*os::Solaris::get_libjsig_version)();
4464 }
4465 assert(UseSignalChaining, "should enable signal-chaining");
4466 }
4467 if (libjsig_is_loaded) {
4468 // Tell libjsig jvm is setting signal handlers
4469 (*begin_signal_setting)();
4470 }
4471
4472 set_signal_handler(SIGSEGV, true, true);
4473 set_signal_handler(SIGPIPE, true, true);
4474 set_signal_handler(SIGXFSZ, true, true);
4475 set_signal_handler(SIGBUS, true, true);
4476 set_signal_handler(SIGILL, true, true);
4477 set_signal_handler(SIGFPE, true, true);
4478
4479
4480 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4481
4482 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4483 // can not register overridable signals which might be > 32
4484 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4485 // Tell libjsig jvm has finished setting signal handlers
4486 (*end_signal_setting)();
4487 libjsigdone = true;
4488 }
4489 }
4490
4491 // Never ok to chain our SIGinterrupt
4492 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4493 set_signal_handler(os::Solaris::SIGasync(), true, true);
4494
4495 if (libjsig_is_loaded && !libjsigdone) {
4496 // Tell libjsig jvm finishes setting signal handlers
4497 (*end_signal_setting)();
4498 }
4499
4500 // We don't activate signal checker if libjsig is in place, we trust ourselves
4501 // and if UserSignalHandler is installed all bets are off.
4502 // Log that signal checking is off only if -verbose:jni is specified.
4503 if (CheckJNICalls) {
4504 if (libjsig_is_loaded) {
4505 if (PrintJNIResolving) {
4506 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4507 }
4508 check_signals = false;
4509 }
4510 if (AllowUserSignalHandlers) {
4511 if (PrintJNIResolving) {
4512 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4513 }
4514 check_signals = false;
4515 }
4516 }
4517 }
4518
4519
4520 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
4521
4522 const char * signames[] = {
4523 "SIG0",
4524 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4525 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4526 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4527 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4528 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4529 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4530 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4531 "SIGCANCEL", "SIGLOST"
4532 };
4533
4534 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4535 if (0 < exception_code && exception_code <= SIGRTMAX) {
4536 // signal
4537 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4538 jio_snprintf(buf, size, "%s", signames[exception_code]);
4539 } else {
4540 jio_snprintf(buf, size, "SIG%d", exception_code);
4541 }
4542 return buf;
4543 } else {
4544 return NULL;
4545 }
4546 }
4547
4548 // (Static) wrappers for the new libthread API
4549 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
4550 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
4551 int_fnP_thread_t_i os::Solaris::_thr_setmutator;
4552 int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
4553 int_fnP_thread_t os::Solaris::_thr_continue_mutator;
4554
4555 // (Static) wrapper for getisax(2) call.
4556 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4557
4558 // (Static) wrappers for the liblgrp API
4559 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4560 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4561 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4562 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4563 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4564 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4565 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4566 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4567 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4568
4569 // (Static) wrapper for meminfo() call.
4570 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4571
4572 static address resolve_symbol_lazy(const char* name) {
4573 address addr = (address) dlsym(RTLD_DEFAULT, name);
4574 if(addr == NULL) {
4575 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4576 addr = (address) dlsym(RTLD_NEXT, name);
4577 }
4578 return addr;
4579 }
4580
4581 static address resolve_symbol(const char* name) {
4582 address addr = resolve_symbol_lazy(name);
4583 if(addr == NULL) {
4584 fatal(dlerror());
4585 }
4586 return addr;
4587 }
4588
4589
4590
4591 // isT2_libthread()
4592 //
4593 // Routine to determine if we are currently using the new T2 libthread.
4594 //
4595 // We determine if we are using T2 by reading /proc/self/lstatus and
4596 // looking for a thread with the ASLWP bit set. If we find this status
4597 // bit set, we must assume that we are NOT using T2. The T2 team
4598 // has approved this algorithm.
4599 //
4600 // We need to determine if we are running with the new T2 libthread
4601 // since setting native thread priorities is handled differently
4602 // when using this library. All threads created using T2 are bound
4603 // threads. Calling thr_setprio is meaningless in this case.
4604 //
4605 bool isT2_libthread() {
4606 static prheader_t * lwpArray = NULL;
4607 static int lwpSize = 0;
4608 static int lwpFile = -1;
4609 lwpstatus_t * that;
4610 char lwpName [128];
4611 bool isT2 = false;
4612
4613 #define ADR(x) ((uintptr_t)(x))
4614 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
4615
4616 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0);
4617 if (lwpFile < 0) {
4618 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n");
4619 return false;
4620 }
4621 lwpSize = 16*1024;
4622 for (;;) {
4623 ::lseek64 (lwpFile, 0, SEEK_SET);
4624 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize, mtInternal);
4625 if (::read(lwpFile, lwpArray, lwpSize) < 0) {
4626 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n");
4627 break;
4628 }
4629 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
4630 // We got a good snapshot - now iterate over the list.
4631 int aslwpcount = 0;
4632 for (int i = 0; i < lwpArray->pr_nent; i++ ) {
4633 that = LWPINDEX(lwpArray,i);
4634 if (that->pr_flags & PR_ASLWP) {
4635 aslwpcount++;
4636 }
4637 }
4638 if (aslwpcount == 0) isT2 = true;
4639 break;
4640 }
4641 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
4642 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); // retry.
4643 }
4644
4645 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal);
4646 ::close (lwpFile);
4647 if (ThreadPriorityVerbose) {
4648 if (isT2) tty->print_cr("We are running with a T2 libthread\n");
4649 else tty->print_cr("We are not running with a T2 libthread\n");
4650 }
4651 return isT2;
4652 }
4653
4654
4655 void os::Solaris::libthread_init() {
4656 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4657
4658 // Determine if we are running with the new T2 libthread
4659 os::Solaris::set_T2_libthread(isT2_libthread());
4660
4661 lwp_priocntl_init();
4662
4663 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4664 if(func == NULL) {
4665 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4666 // Guarantee that this VM is running on an new enough OS (5.6 or
4667 // later) that it will have a new enough libthread.so.
4668 guarantee(func != NULL, "libthread.so is too old.");
4669 }
4670
4671 // Initialize the new libthread getstate API wrappers
4672 func = resolve_symbol("thr_getstate");
4673 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
4674
4675 func = resolve_symbol("thr_setstate");
4676 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
4677
4678 func = resolve_symbol("thr_setmutator");
4679 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
4680
4681 func = resolve_symbol("thr_suspend_mutator");
4682 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4683
4684 func = resolve_symbol("thr_continue_mutator");
4685 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4686
4687 int size;
4688 void (*handler_info_func)(address *, int *);
4689 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4690 handler_info_func(&handler_start, &size);
4691 handler_end = handler_start + size;
4692 }
4693
4694
4695 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4696 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4697 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4698 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4699 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4700 int os::Solaris::_mutex_scope = USYNC_THREAD;
4701
4702 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4703 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4704 int_fnP_cond_tP os::Solaris::_cond_signal;
4705 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4706 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4707 int_fnP_cond_tP os::Solaris::_cond_destroy;
4708 int os::Solaris::_cond_scope = USYNC_THREAD;
4709
4710 void os::Solaris::synchronization_init() {
4711 if(UseLWPSynchronization) {
4712 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4713 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4714 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4715 os::Solaris::set_mutex_init(lwp_mutex_init);
4716 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4717 os::Solaris::set_mutex_scope(USYNC_THREAD);
4718
4719 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4720 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4721 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4722 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4723 os::Solaris::set_cond_init(lwp_cond_init);
4724 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4725 os::Solaris::set_cond_scope(USYNC_THREAD);
4726 }
4727 else {
4728 os::Solaris::set_mutex_scope(USYNC_THREAD);
4729 os::Solaris::set_cond_scope(USYNC_THREAD);
4730
4731 if(UsePthreads) {
4732 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4733 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4734 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4735 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4736 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4737
4738 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4739 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4740 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4741 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4742 os::Solaris::set_cond_init(pthread_cond_default_init);
4743 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4744 }
4745 else {
4746 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4747 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4748 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4749 os::Solaris::set_mutex_init(::mutex_init);
4750 os::Solaris::set_mutex_destroy(::mutex_destroy);
4751
4752 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4753 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4754 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4755 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4756 os::Solaris::set_cond_init(::cond_init);
4757 os::Solaris::set_cond_destroy(::cond_destroy);
4758 }
4759 }
4760 }
4761
4762 bool os::Solaris::liblgrp_init() {
4763 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4764 if (handle != NULL) {
4765 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4766 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4767 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4768 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4769 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4770 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4771 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4772 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4773 dlsym(handle, "lgrp_cookie_stale")));
4774
4775 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4776 set_lgrp_cookie(c);
4777 return true;
4778 }
4779 return false;
4780 }
4781
4782 void os::Solaris::misc_sym_init() {
4783 address func;
4784
4785 // getisax
4786 func = resolve_symbol_lazy("getisax");
4787 if (func != NULL) {
4788 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4789 }
4790
4791 // meminfo
4792 func = resolve_symbol_lazy("meminfo");
4793 if (func != NULL) {
4794 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4795 }
4796 }
4797
4798 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4799 assert(_getisax != NULL, "_getisax not set");
4800 return _getisax(array, n);
4801 }
4802
4803 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4804 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4805 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4806
4807 void init_pset_getloadavg_ptr(void) {
4808 pset_getloadavg_ptr =
4809 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4810 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4811 warning("pset_getloadavg function not found");
4812 }
4813 }
4814
4815 int os::Solaris::_dev_zero_fd = -1;
4816
4817 // this is called _before_ the global arguments have been parsed
4818 void os::init(void) {
4819 _initial_pid = getpid();
4820
4821 max_hrtime = first_hrtime = gethrtime();
4822
4823 init_random(1234567);
4824
4825 page_size = sysconf(_SC_PAGESIZE);
4826 if (page_size == -1)
4827 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4828 strerror(errno)));
4829 init_page_sizes((size_t) page_size);
4830
4831 Solaris::initialize_system_info();
4832
4833 // Initialize misc. symbols as soon as possible, so we can use them
4834 // if we need them.
4835 Solaris::misc_sym_init();
4836
4837 int fd = ::open("/dev/zero", O_RDWR);
4838 if (fd < 0) {
4839 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
4840 } else {
4841 Solaris::set_dev_zero_fd(fd);
4842
4843 // Close on exec, child won't inherit.
4844 fcntl(fd, F_SETFD, FD_CLOEXEC);
4845 }
4846
4847 clock_tics_per_sec = CLK_TCK;
4848
4849 // check if dladdr1() exists; dladdr1 can provide more information than
4850 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4851 // and is available on linker patches for 5.7 and 5.8.
4852 // libdl.so must have been loaded, this call is just an entry lookup
4853 void * hdl = dlopen("libdl.so", RTLD_NOW);
4854 if (hdl)
4855 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4856
4857 // (Solaris only) this switches to calls that actually do locking.
4858 ThreadCritical::initialize();
4859
4860 main_thread = thr_self();
4861
4862 // Constant minimum stack size allowed. It must be at least
4863 // the minimum of what the OS supports (thr_min_stack()), and
4864 // enough to allow the thread to get to user bytecode execution.
4865 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4866 // If the pagesize of the VM is greater than 8K determine the appropriate
4867 // number of initial guard pages. The user can change this with the
4868 // command line arguments, if needed.
4869 if (vm_page_size() > 8*K) {
4870 StackYellowPages = 1;
4871 StackRedPages = 1;
4872 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4873 }
4874 }
4875
4876 // To install functions for atexit system call
4877 extern "C" {
4878 static void perfMemory_exit_helper() {
4879 perfMemory_exit();
4880 }
4881 }
4882
4883 // this is called _after_ the global arguments have been parsed
4884 jint os::init_2(void) {
4885 // try to enable extended file IO ASAP, see 6431278
4886 os::Solaris::try_enable_extended_io();
4887
4888 // Allocate a single page and mark it as readable for safepoint polling. Also
4889 // use this first mmap call to check support for MAP_ALIGN.
4890 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4891 page_size,
4892 MAP_PRIVATE | MAP_ALIGN,
4893 PROT_READ);
4894 if (polling_page == NULL) {
4895 has_map_align = false;
4896 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4897 PROT_READ);
4898 }
4899
4900 os::set_polling_page(polling_page);
4901
4902 #ifndef PRODUCT
4903 if( Verbose && PrintMiscellaneous )
4904 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
4905 #endif
4906
4907 if (!UseMembar) {
4908 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
4909 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
4910 os::set_memory_serialize_page( mem_serialize_page );
4911
4912 #ifndef PRODUCT
4913 if(Verbose && PrintMiscellaneous)
4914 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
4915 #endif
4916 }
4917
4918 // Check minimum allowable stack size for thread creation and to initialize
4919 // the java system classes, including StackOverflowError - depends on page
4920 // size. Add a page for compiler2 recursion in main thread.
4921 // Add in 2*BytesPerWord times page size to account for VM stack during
4922 // class initialization depending on 32 or 64 bit VM.
4923 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
4924 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
4925 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
4926
4927 size_t threadStackSizeInBytes = ThreadStackSize * K;
4928 if (threadStackSizeInBytes != 0 &&
4929 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
4930 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
4931 os::Solaris::min_stack_allowed/K);
4932 return JNI_ERR;
4933 }
4934
4935 // For 64kbps there will be a 64kb page size, which makes
4936 // the usable default stack size quite a bit less. Increase the
4937 // stack for 64kb (or any > than 8kb) pages, this increases
4938 // virtual memory fragmentation (since we're not creating the
4939 // stack on a power of 2 boundary. The real fix for this
4940 // should be to fix the guard page mechanism.
4941
4942 if (vm_page_size() > 8*K) {
4943 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
4944 ? threadStackSizeInBytes +
4945 ((StackYellowPages + StackRedPages) * vm_page_size())
4946 : 0;
4947 ThreadStackSize = threadStackSizeInBytes/K;
4948 }
4949
4950 // Make the stack size a multiple of the page size so that
4951 // the yellow/red zones can be guarded.
4952 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
4953 vm_page_size()));
4954
4955 Solaris::libthread_init();
4956
4957 if (UseNUMA) {
4958 if (!Solaris::liblgrp_init()) {
4959 UseNUMA = false;
4960 } else {
4961 size_t lgrp_limit = os::numa_get_groups_num();
4962 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
4963 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4964 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal);
4965 if (lgrp_num < 2) {
4966 // There's only one locality group, disable NUMA.
4967 UseNUMA = false;
4968 }
4969 }
4970 if (!UseNUMA && ForceNUMA) {
4971 UseNUMA = true;
4972 }
4973 }
4974
4975 Solaris::signal_sets_init();
4976 Solaris::init_signal_mem();
4977 Solaris::install_signal_handlers();
4978
4979 if (libjsigversion < JSIG_VERSION_1_4_1) {
4980 Maxlibjsigsigs = OLDMAXSIGNUM;
4981 }
4982
4983 // initialize synchronization primitives to use either thread or
4984 // lwp synchronization (controlled by UseLWPSynchronization)
4985 Solaris::synchronization_init();
4986
4987 if (MaxFDLimit) {
4988 // set the number of file descriptors to max. print out error
4989 // if getrlimit/setrlimit fails but continue regardless.
4990 struct rlimit nbr_files;
4991 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4992 if (status != 0) {
4993 if (PrintMiscellaneous && (Verbose || WizardMode))
4994 perror("os::init_2 getrlimit failed");
4995 } else {
4996 nbr_files.rlim_cur = nbr_files.rlim_max;
4997 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4998 if (status != 0) {
4999 if (PrintMiscellaneous && (Verbose || WizardMode))
5000 perror("os::init_2 setrlimit failed");
5001 }
5002 }
5003 }
5004
5005 // Calculate theoretical max. size of Threads to guard gainst
5006 // artifical out-of-memory situations, where all available address-
5007 // space has been reserved by thread stacks. Default stack size is 1Mb.
5008 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
5009 JavaThread::stack_size_at_create() : (1*K*K);
5010 assert(pre_thread_stack_size != 0, "Must have a stack");
5011 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
5012 // we should start doing Virtual Memory banging. Currently when the threads will
5013 // have used all but 200Mb of space.
5014 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
5015 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
5016
5017 // at-exit methods are called in the reverse order of their registration.
5018 // In Solaris 7 and earlier, atexit functions are called on return from
5019 // main or as a result of a call to exit(3C). There can be only 32 of
5020 // these functions registered and atexit() does not set errno. In Solaris
5021 // 8 and later, there is no limit to the number of functions registered
5022 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
5023 // functions are called upon dlclose(3DL) in addition to return from main
5024 // and exit(3C).
5025
5026 if (PerfAllowAtExitRegistration) {
5027 // only register atexit functions if PerfAllowAtExitRegistration is set.
5028 // atexit functions can be delayed until process exit time, which
5029 // can be problematic for embedded VM situations. Embedded VMs should
5030 // call DestroyJavaVM() to assure that VM resources are released.
5031
5032 // note: perfMemory_exit_helper atexit function may be removed in
5033 // the future if the appropriate cleanup code can be added to the
5034 // VM_Exit VMOperation's doit method.
5035 if (atexit(perfMemory_exit_helper) != 0) {
5036 warning("os::init2 atexit(perfMemory_exit_helper) failed");
5037 }
5038 }
5039
5040 // Init pset_loadavg function pointer
5041 init_pset_getloadavg_ptr();
5042
5043 return JNI_OK;
5044 }
5045
5046 void os::init_3(void) {
5047 return;
5048 }
5049
5050 // Mark the polling page as unreadable
5051 void os::make_polling_page_unreadable(void) {
5052 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
5053 fatal("Could not disable polling page");
5054 };
5055
5056 // Mark the polling page as readable
5057 void os::make_polling_page_readable(void) {
5058 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
5059 fatal("Could not enable polling page");
5060 };
5061
5062 // OS interface.
5063
5064 bool os::check_heap(bool force) { return true; }
5065
5066 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
5067 static vsnprintf_t sol_vsnprintf = NULL;
5068
5069 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
5070 if (!sol_vsnprintf) {
5071 //search for the named symbol in the objects that were loaded after libjvm
5072 void* where = RTLD_NEXT;
5073 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5074 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5075 if (!sol_vsnprintf){
5076 //search for the named symbol in the objects that were loaded before libjvm
5077 where = RTLD_DEFAULT;
5078 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5079 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5080 assert(sol_vsnprintf != NULL, "vsnprintf not found");
5081 }
5082 }
5083 return (*sol_vsnprintf)(buf, count, fmt, argptr);
5084 }
5085
5086
5087 // Is a (classpath) directory empty?
5088 bool os::dir_is_empty(const char* path) {
5089 DIR *dir = NULL;
5090 struct dirent *ptr;
5091
5092 dir = opendir(path);
5093 if (dir == NULL) return true;
5094
5095 /* Scan the directory */
5096 bool result = true;
5097 char buf[sizeof(struct dirent) + MAX_PATH];
5098 struct dirent *dbuf = (struct dirent *) buf;
5099 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
5100 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
5101 result = false;
5102 }
5103 }
5104 closedir(dir);
5105 return result;
5106 }
5107
5108 // This code originates from JDK's sysOpen and open64_w
5109 // from src/solaris/hpi/src/system_md.c
5110
5111 #ifndef O_DELETE
5112 #define O_DELETE 0x10000
5113 #endif
5114
5115 // Open a file. Unlink the file immediately after open returns
5116 // if the specified oflag has the O_DELETE flag set.
5117 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
5118
5119 int os::open(const char *path, int oflag, int mode) {
5120 if (strlen(path) > MAX_PATH - 1) {
5121 errno = ENAMETOOLONG;
5122 return -1;
5123 }
5124 int fd;
5125 int o_delete = (oflag & O_DELETE);
5126 oflag = oflag & ~O_DELETE;
5127
5128 fd = ::open64(path, oflag, mode);
5129 if (fd == -1) return -1;
5130
5131 //If the open succeeded, the file might still be a directory
5132 {
5133 struct stat64 buf64;
5134 int ret = ::fstat64(fd, &buf64);
5135 int st_mode = buf64.st_mode;
5136
5137 if (ret != -1) {
5138 if ((st_mode & S_IFMT) == S_IFDIR) {
5139 errno = EISDIR;
5140 ::close(fd);
5141 return -1;
5142 }
5143 } else {
5144 ::close(fd);
5145 return -1;
5146 }
5147 }
5148 /*
5149 * 32-bit Solaris systems suffer from:
5150 *
5151 * - an historical default soft limit of 256 per-process file
5152 * descriptors that is too low for many Java programs.
5153 *
5154 * - a design flaw where file descriptors created using stdio
5155 * fopen must be less than 256, _even_ when the first limit above
5156 * has been raised. This can cause calls to fopen (but not calls to
5157 * open, for example) to fail mysteriously, perhaps in 3rd party
5158 * native code (although the JDK itself uses fopen). One can hardly
5159 * criticize them for using this most standard of all functions.
5160 *
5161 * We attempt to make everything work anyways by:
5162 *
5163 * - raising the soft limit on per-process file descriptors beyond
5164 * 256
5165 *
5166 * - As of Solaris 10u4, we can request that Solaris raise the 256
5167 * stdio fopen limit by calling function enable_extended_FILE_stdio.
5168 * This is done in init_2 and recorded in enabled_extended_FILE_stdio
5169 *
5170 * - If we are stuck on an old (pre 10u4) Solaris system, we can
5171 * workaround the bug by remapping non-stdio file descriptors below
5172 * 256 to ones beyond 256, which is done below.
5173 *
5174 * See:
5175 * 1085341: 32-bit stdio routines should support file descriptors >255
5176 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files
5177 * 6431278: Netbeans crash on 32 bit Solaris: need to call
5178 * enable_extended_FILE_stdio() in VM initialisation
5179 * Giri Mandalika's blog
5180 * http://technopark02.blogspot.com/2005_05_01_archive.html
5181 */
5182 #ifndef _LP64
5183 if ((!enabled_extended_FILE_stdio) && fd < 256) {
5184 int newfd = ::fcntl(fd, F_DUPFD, 256);
5185 if (newfd != -1) {
5186 ::close(fd);
5187 fd = newfd;
5188 }
5189 }
5190 #endif // 32-bit Solaris
5191 /*
5192 * All file descriptors that are opened in the JVM and not
5193 * specifically destined for a subprocess should have the
5194 * close-on-exec flag set. If we don't set it, then careless 3rd
5195 * party native code might fork and exec without closing all
5196 * appropriate file descriptors (e.g. as we do in closeDescriptors in
5197 * UNIXProcess.c), and this in turn might:
5198 *
5199 * - cause end-of-file to fail to be detected on some file
5200 * descriptors, resulting in mysterious hangs, or
5201 *
5202 * - might cause an fopen in the subprocess to fail on a system
5203 * suffering from bug 1085341.
5204 *
5205 * (Yes, the default setting of the close-on-exec flag is a Unix
5206 * design flaw)
5207 *
5208 * See:
5209 * 1085341: 32-bit stdio routines should support file descriptors >255
5210 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
5211 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
5212 */
5213 #ifdef FD_CLOEXEC
5214 {
5215 int flags = ::fcntl(fd, F_GETFD);
5216 if (flags != -1)
5217 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
5218 }
5219 #endif
5220
5221 if (o_delete != 0) {
5222 ::unlink(path);
5223 }
5224 return fd;
5225 }
5226
5227 // create binary file, rewriting existing file if required
5228 int os::create_binary_file(const char* path, bool rewrite_existing) {
5229 int oflags = O_WRONLY | O_CREAT;
5230 if (!rewrite_existing) {
5231 oflags |= O_EXCL;
5232 }
5233 return ::open64(path, oflags, S_IREAD | S_IWRITE);
5234 }
5235
5236 // return current position of file pointer
5237 jlong os::current_file_offset(int fd) {
5238 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
5239 }
5240
5241 // move file pointer to the specified offset
5242 jlong os::seek_to_file_offset(int fd, jlong offset) {
5243 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
5244 }
5245
5246 jlong os::lseek(int fd, jlong offset, int whence) {
5247 return (jlong) ::lseek64(fd, offset, whence);
5248 }
5249
5250 char * os::native_path(char *path) {
5251 return path;
5252 }
5253
5254 int os::ftruncate(int fd, jlong length) {
5255 return ::ftruncate64(fd, length);
5256 }
5257
5258 int os::fsync(int fd) {
5259 RESTARTABLE_RETURN_INT(::fsync(fd));
5260 }
5261
5262 int os::available(int fd, jlong *bytes) {
5263 jlong cur, end;
5264 int mode;
5265 struct stat64 buf64;
5266
5267 if (::fstat64(fd, &buf64) >= 0) {
5268 mode = buf64.st_mode;
5269 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
5270 /*
5271 * XXX: is the following call interruptible? If so, this might
5272 * need to go through the INTERRUPT_IO() wrapper as for other
5273 * blocking, interruptible calls in this file.
5274 */
5275 int n,ioctl_return;
5276
5277 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted);
5278 if (ioctl_return>= 0) {
5279 *bytes = n;
5280 return 1;
5281 }
5282 }
5283 }
5284 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
5285 return 0;
5286 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
5287 return 0;
5288 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
5289 return 0;
5290 }
5291 *bytes = end - cur;
5292 return 1;
5293 }
5294
5295 // Map a block of memory.
5296 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
5297 char *addr, size_t bytes, bool read_only,
5298 bool allow_exec) {
5299 int prot;
5300 int flags;
5301
5302 if (read_only) {
5303 prot = PROT_READ;
5304 flags = MAP_SHARED;
5305 } else {
5306 prot = PROT_READ | PROT_WRITE;
5307 flags = MAP_PRIVATE;
5308 }
5309
5310 if (allow_exec) {
5311 prot |= PROT_EXEC;
5312 }
5313
5314 if (addr != NULL) {
5315 flags |= MAP_FIXED;
5316 }
5317
5318 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5319 fd, file_offset);
5320 if (mapped_address == MAP_FAILED) {
5321 return NULL;
5322 }
5323 return mapped_address;
5324 }
5325
5326
5327 // Remap a block of memory.
5328 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5329 char *addr, size_t bytes, bool read_only,
5330 bool allow_exec) {
5331 // same as map_memory() on this OS
5332 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5333 allow_exec);
5334 }
5335
5336
5337 // Unmap a block of memory.
5338 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5339 return munmap(addr, bytes) == 0;
5340 }
5341
5342 void os::pause() {
5343 char filename[MAX_PATH];
5344 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5345 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5346 } else {
5347 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5348 }
5349
5350 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5351 if (fd != -1) {
5352 struct stat buf;
5353 ::close(fd);
5354 while (::stat(filename, &buf) == 0) {
5355 (void)::poll(NULL, 0, 100);
5356 }
5357 } else {
5358 jio_fprintf(stderr,
5359 "Could not open pause file '%s', continuing immediately.\n", filename);
5360 }
5361 }
5362
5363 #ifndef PRODUCT
5364 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5365 // Turn this on if you need to trace synch operations.
5366 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5367 // and call record_synch_enable and record_synch_disable
5368 // around the computation of interest.
5369
5370 void record_synch(char* name, bool returning); // defined below
5371
5372 class RecordSynch {
5373 char* _name;
5374 public:
5375 RecordSynch(char* name) :_name(name)
5376 { record_synch(_name, false); }
5377 ~RecordSynch() { record_synch(_name, true); }
5378 };
5379
5380 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5381 extern "C" ret name params { \
5382 typedef ret name##_t params; \
5383 static name##_t* implem = NULL; \
5384 static int callcount = 0; \
5385 if (implem == NULL) { \
5386 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5387 if (implem == NULL) fatal(dlerror()); \
5388 } \
5389 ++callcount; \
5390 RecordSynch _rs(#name); \
5391 inner; \
5392 return implem args; \
5393 }
5394 // in dbx, examine callcounts this way:
5395 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5396
5397 #define CHECK_POINTER_OK(p) \
5398 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5399 #define CHECK_MU \
5400 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5401 #define CHECK_CV \
5402 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5403 #define CHECK_P(p) \
5404 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5405
5406 #define CHECK_MUTEX(mutex_op) \
5407 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5408
5409 CHECK_MUTEX( mutex_lock)
5410 CHECK_MUTEX( _mutex_lock)
5411 CHECK_MUTEX( mutex_unlock)
5412 CHECK_MUTEX(_mutex_unlock)
5413 CHECK_MUTEX( mutex_trylock)
5414 CHECK_MUTEX(_mutex_trylock)
5415
5416 #define CHECK_COND(cond_op) \
5417 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
5418
5419 CHECK_COND( cond_wait);
5420 CHECK_COND(_cond_wait);
5421 CHECK_COND(_cond_wait_cancel);
5422
5423 #define CHECK_COND2(cond_op) \
5424 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
5425
5426 CHECK_COND2( cond_timedwait);
5427 CHECK_COND2(_cond_timedwait);
5428 CHECK_COND2(_cond_timedwait_cancel);
5429
5430 // do the _lwp_* versions too
5431 #define mutex_t lwp_mutex_t
5432 #define cond_t lwp_cond_t
5433 CHECK_MUTEX( _lwp_mutex_lock)
5434 CHECK_MUTEX( _lwp_mutex_unlock)
5435 CHECK_MUTEX( _lwp_mutex_trylock)
5436 CHECK_MUTEX( __lwp_mutex_lock)
5437 CHECK_MUTEX( __lwp_mutex_unlock)
5438 CHECK_MUTEX( __lwp_mutex_trylock)
5439 CHECK_MUTEX(___lwp_mutex_lock)
5440 CHECK_MUTEX(___lwp_mutex_unlock)
5441
5442 CHECK_COND( _lwp_cond_wait);
5443 CHECK_COND( __lwp_cond_wait);
5444 CHECK_COND(___lwp_cond_wait);
5445
5446 CHECK_COND2( _lwp_cond_timedwait);
5447 CHECK_COND2( __lwp_cond_timedwait);
5448 #undef mutex_t
5449 #undef cond_t
5450
5451 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5452 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5453 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5454 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5455 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5456 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5457 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5458 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5459
5460
5461 // recording machinery:
5462
5463 enum { RECORD_SYNCH_LIMIT = 200 };
5464 char* record_synch_name[RECORD_SYNCH_LIMIT];
5465 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5466 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5467 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5468 int record_synch_count = 0;
5469 bool record_synch_enabled = false;
5470
5471 // in dbx, examine recorded data this way:
5472 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5473
5474 void record_synch(char* name, bool returning) {
5475 if (record_synch_enabled) {
5476 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5477 record_synch_name[record_synch_count] = name;
5478 record_synch_returning[record_synch_count] = returning;
5479 record_synch_thread[record_synch_count] = thr_self();
5480 record_synch_arg0ptr[record_synch_count] = &name;
5481 record_synch_count++;
5482 }
5483 // put more checking code here:
5484 // ...
5485 }
5486 }
5487
5488 void record_synch_enable() {
5489 // start collecting trace data, if not already doing so
5490 if (!record_synch_enabled) record_synch_count = 0;
5491 record_synch_enabled = true;
5492 }
5493
5494 void record_synch_disable() {
5495 // stop collecting trace data
5496 record_synch_enabled = false;
5497 }
5498
5499 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5500 #endif // PRODUCT
5501
5502 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5503 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5504 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5505
5506
5507 // JVMTI & JVM monitoring and management support
5508 // The thread_cpu_time() and current_thread_cpu_time() are only
5509 // supported if is_thread_cpu_time_supported() returns true.
5510 // They are not supported on Solaris T1.
5511
5512 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5513 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5514 // of a thread.
5515 //
5516 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5517 // returns the fast estimate available on the platform.
5518
5519 // hrtime_t gethrvtime() return value includes
5520 // user time but does not include system time
5521 jlong os::current_thread_cpu_time() {
5522 return (jlong) gethrvtime();
5523 }
5524
5525 jlong os::thread_cpu_time(Thread *thread) {
5526 // return user level CPU time only to be consistent with
5527 // what current_thread_cpu_time returns.
5528 // thread_cpu_time_info() must be changed if this changes
5529 return os::thread_cpu_time(thread, false /* user time only */);
5530 }
5531
5532 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5533 if (user_sys_cpu_time) {
5534 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5535 } else {
5536 return os::current_thread_cpu_time();
5537 }
5538 }
5539
5540 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5541 char proc_name[64];
5542 int count;
5543 prusage_t prusage;
5544 jlong lwp_time;
5545 int fd;
5546
5547 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5548 getpid(),
5549 thread->osthread()->lwp_id());
5550 fd = ::open(proc_name, O_RDONLY);
5551 if ( fd == -1 ) return -1;
5552
5553 do {
5554 count = ::pread(fd,
5555 (void *)&prusage.pr_utime,
5556 thr_time_size,
5557 thr_time_off);
5558 } while (count < 0 && errno == EINTR);
5559 ::close(fd);
5560 if ( count < 0 ) return -1;
5561
5562 if (user_sys_cpu_time) {
5563 // user + system CPU time
5564 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5565 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5566 (jlong)prusage.pr_stime.tv_nsec +
5567 (jlong)prusage.pr_utime.tv_nsec;
5568 } else {
5569 // user level CPU time only
5570 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5571 (jlong)prusage.pr_utime.tv_nsec;
5572 }
5573
5574 return(lwp_time);
5575 }
5576
5577 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5578 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5579 info_ptr->may_skip_backward = false; // elapsed time not wall time
5580 info_ptr->may_skip_forward = false; // elapsed time not wall time
5581 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5582 }
5583
5584 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5585 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5586 info_ptr->may_skip_backward = false; // elapsed time not wall time
5587 info_ptr->may_skip_forward = false; // elapsed time not wall time
5588 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5589 }
5590
5591 bool os::is_thread_cpu_time_supported() {
5592 if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
5593 return true;
5594 } else {
5595 return false;
5596 }
5597 }
5598
5599 // System loadavg support. Returns -1 if load average cannot be obtained.
5600 // Return the load average for our processor set if the primitive exists
5601 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5602 int os::loadavg(double loadavg[], int nelem) {
5603 if (pset_getloadavg_ptr != NULL) {
5604 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5605 } else {
5606 return ::getloadavg(loadavg, nelem);
5607 }
5608 }
5609
5610 //---------------------------------------------------------------------------------
5611
5612 bool os::find(address addr, outputStream* st) {
5613 Dl_info dlinfo;
5614 memset(&dlinfo, 0, sizeof(dlinfo));
5615 if (dladdr(addr, &dlinfo) != 0) {
5616 st->print(PTR_FORMAT ": ", addr);
5617 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
5618 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5619 } else if (dlinfo.dli_fbase != NULL)
5620 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5621 else
5622 st->print("<absolute address>");
5623 if (dlinfo.dli_fname != NULL) {
5624 st->print(" in %s", dlinfo.dli_fname);
5625 }
5626 if (dlinfo.dli_fbase != NULL) {
5627 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
5628 }
5629 st->cr();
5630
5631 if (Verbose) {
5632 // decode some bytes around the PC
5633 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size());
5634 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size());
5635 address lowest = (address) dlinfo.dli_sname;
5636 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5637 if (begin < lowest) begin = lowest;
5638 Dl_info dlinfo2;
5639 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
5640 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
5641 end = (address) dlinfo2.dli_saddr;
5642 Disassembler::decode(begin, end, st);
5643 }
5644 return true;
5645 }
5646 return false;
5647 }
5648
5649 // Following function has been added to support HotSparc's libjvm.so running
5650 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5651 // src/solaris/hpi/native_threads in the EVM codebase.
5652 //
5653 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5654 // libraries and should thus be removed. We will leave it behind for a while
5655 // until we no longer want to able to run on top of 1.3.0 Solaris production
5656 // JDK. See 4341971.
5657
5658 #define STACK_SLACK 0x800
5659
5660 extern "C" {
5661 intptr_t sysThreadAvailableStackWithSlack() {
5662 stack_t st;
5663 intptr_t retval, stack_top;
5664 retval = thr_stksegment(&st);
5665 assert(retval == 0, "incorrect return value from thr_stksegment");
5666 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5667 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5668 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5669 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5670 }
5671 }
5672
5673 // ObjectMonitor park-unpark infrastructure ...
5674 //
5675 // We implement Solaris and Linux PlatformEvents with the
5676 // obvious condvar-mutex-flag triple.
5677 // Another alternative that works quite well is pipes:
5678 // Each PlatformEvent consists of a pipe-pair.
5679 // The thread associated with the PlatformEvent
5680 // calls park(), which reads from the input end of the pipe.
5681 // Unpark() writes into the other end of the pipe.
5682 // The write-side of the pipe must be set NDELAY.
5683 // Unfortunately pipes consume a large # of handles.
5684 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5685 // Using pipes for the 1st few threads might be workable, however.
5686 //
5687 // park() is permitted to return spuriously.
5688 // Callers of park() should wrap the call to park() in
5689 // an appropriate loop. A litmus test for the correct
5690 // usage of park is the following: if park() were modified
5691 // to immediately return 0 your code should still work,
5692 // albeit degenerating to a spin loop.
5693 //
5694 // An interesting optimization for park() is to use a trylock()
5695 // to attempt to acquire the mutex. If the trylock() fails
5696 // then we know that a concurrent unpark() operation is in-progress.
5697 // in that case the park() code could simply set _count to 0
5698 // and return immediately. The subsequent park() operation *might*
5699 // return immediately. That's harmless as the caller of park() is
5700 // expected to loop. By using trylock() we will have avoided a
5701 // avoided a context switch caused by contention on the per-thread mutex.
5702 //
5703 // TODO-FIXME:
5704 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5705 // objectmonitor implementation.
5706 // 2. Collapse the JSR166 parker event, and the
5707 // objectmonitor ParkEvent into a single "Event" construct.
5708 // 3. In park() and unpark() add:
5709 // assert (Thread::current() == AssociatedWith).
5710 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5711 // 1-out-of-N park() operations will return immediately.
5712 //
5713 // _Event transitions in park()
5714 // -1 => -1 : illegal
5715 // 1 => 0 : pass - return immediately
5716 // 0 => -1 : block
5717 //
5718 // _Event serves as a restricted-range semaphore.
5719 //
5720 // Another possible encoding of _Event would be with
5721 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5722 //
5723 // TODO-FIXME: add DTRACE probes for:
5724 // 1. Tx parks
5725 // 2. Ty unparks Tx
5726 // 3. Tx resumes from park
5727
5728
5729 // value determined through experimentation
5730 #define ROUNDINGFIX 11
5731
5732 // utility to compute the abstime argument to timedwait.
5733 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5734
5735 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5736 // millis is the relative timeout time
5737 // abstime will be the absolute timeout time
5738 if (millis < 0) millis = 0;
5739 struct timeval now;
5740 int status = gettimeofday(&now, NULL);
5741 assert(status == 0, "gettimeofday");
5742 jlong seconds = millis / 1000;
5743 jlong max_wait_period;
5744
5745 if (UseLWPSynchronization) {
5746 // forward port of fix for 4275818 (not sleeping long enough)
5747 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5748 // _lwp_cond_timedwait() used a round_down algorithm rather
5749 // than a round_up. For millis less than our roundfactor
5750 // it rounded down to 0 which doesn't meet the spec.
5751 // For millis > roundfactor we may return a bit sooner, but
5752 // since we can not accurately identify the patch level and
5753 // this has already been fixed in Solaris 9 and 8 we will
5754 // leave it alone rather than always rounding down.
5755
5756 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5757 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5758 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5759 max_wait_period = 21000000;
5760 } else {
5761 max_wait_period = 50000000;
5762 }
5763 millis %= 1000;
5764 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5765 seconds = max_wait_period;
5766 }
5767 abstime->tv_sec = now.tv_sec + seconds;
5768 long usec = now.tv_usec + millis * 1000;
5769 if (usec >= 1000000) {
5770 abstime->tv_sec += 1;
5771 usec -= 1000000;
5772 }
5773 abstime->tv_nsec = usec * 1000;
5774 return abstime;
5775 }
5776
5777 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
5778 // Conceptually TryPark() should be equivalent to park(0).
5779
5780 int os::PlatformEvent::TryPark() {
5781 for (;;) {
5782 const int v = _Event ;
5783 guarantee ((v == 0) || (v == 1), "invariant") ;
5784 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
5785 }
5786 }
5787
5788 void os::PlatformEvent::park() { // AKA: down()
5789 // Invariant: Only the thread associated with the Event/PlatformEvent
5790 // may call park().
5791 int v ;
5792 for (;;) {
5793 v = _Event ;
5794 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5795 }
5796 guarantee (v >= 0, "invariant") ;
5797 if (v == 0) {
5798 // Do this the hard way by blocking ...
5799 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5800 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5801 // Only for SPARC >= V8PlusA
5802 #if defined(__sparc) && defined(COMPILER2)
5803 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5804 #endif
5805 int status = os::Solaris::mutex_lock(_mutex);
5806 assert_status(status == 0, status, "mutex_lock");
5807 guarantee (_nParked == 0, "invariant") ;
5808 ++ _nParked ;
5809 while (_Event < 0) {
5810 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5811 // Treat this the same as if the wait was interrupted
5812 // With usr/lib/lwp going to kernel, always handle ETIME
5813 status = os::Solaris::cond_wait(_cond, _mutex);
5814 if (status == ETIME) status = EINTR ;
5815 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5816 }
5817 -- _nParked ;
5818 _Event = 0 ;
5819 status = os::Solaris::mutex_unlock(_mutex);
5820 assert_status(status == 0, status, "mutex_unlock");
5821 // Paranoia to ensure our locked and lock-free paths interact
5822 // correctly with each other.
5823 OrderAccess::fence();
5824 }
5825 }
5826
5827 int os::PlatformEvent::park(jlong millis) {
5828 guarantee (_nParked == 0, "invariant") ;
5829 int v ;
5830 for (;;) {
5831 v = _Event ;
5832 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5833 }
5834 guarantee (v >= 0, "invariant") ;
5835 if (v != 0) return OS_OK ;
5836
5837 int ret = OS_TIMEOUT;
5838 timestruc_t abst;
5839 compute_abstime (&abst, millis);
5840
5841 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5842 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5843 // Only for SPARC >= V8PlusA
5844 #if defined(__sparc) && defined(COMPILER2)
5845 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5846 #endif
5847 int status = os::Solaris::mutex_lock(_mutex);
5848 assert_status(status == 0, status, "mutex_lock");
5849 guarantee (_nParked == 0, "invariant") ;
5850 ++ _nParked ;
5851 while (_Event < 0) {
5852 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5853 assert_status(status == 0 || status == EINTR ||
5854 status == ETIME || status == ETIMEDOUT,
5855 status, "cond_timedwait");
5856 if (!FilterSpuriousWakeups) break ; // previous semantics
5857 if (status == ETIME || status == ETIMEDOUT) break ;
5858 // We consume and ignore EINTR and spurious wakeups.
5859 }
5860 -- _nParked ;
5861 if (_Event >= 0) ret = OS_OK ;
5862 _Event = 0 ;
5863 status = os::Solaris::mutex_unlock(_mutex);
5864 assert_status(status == 0, status, "mutex_unlock");
5865 // Paranoia to ensure our locked and lock-free paths interact
5866 // correctly with each other.
5867 OrderAccess::fence();
5868 return ret;
5869 }
5870
5871 void os::PlatformEvent::unpark() {
5872 // Transitions for _Event:
5873 // 0 :=> 1
5874 // 1 :=> 1
5875 // -1 :=> either 0 or 1; must signal target thread
5876 // That is, we can safely transition _Event from -1 to either
5877 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back
5878 // unpark() calls.
5879 // See also: "Semaphores in Plan 9" by Mullender & Cox
5880 //
5881 // Note: Forcing a transition from "-1" to "1" on an unpark() means
5882 // that it will take two back-to-back park() calls for the owning
5883 // thread to block. This has the benefit of forcing a spurious return
5884 // from the first park() call after an unpark() call which will help
5885 // shake out uses of park() and unpark() without condition variables.
5886
5887 if (Atomic::xchg(1, &_Event) >= 0) return;
5888
5889 // If the thread associated with the event was parked, wake it.
5890 // Wait for the thread assoc with the PlatformEvent to vacate.
5891 int status = os::Solaris::mutex_lock(_mutex);
5892 assert_status(status == 0, status, "mutex_lock");
5893 int AnyWaiters = _nParked;
5894 status = os::Solaris::mutex_unlock(_mutex);
5895 assert_status(status == 0, status, "mutex_unlock");
5896 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
5897 if (AnyWaiters != 0) {
5898 // We intentional signal *after* dropping the lock
5899 // to avoid a common class of futile wakeups.
5900 status = os::Solaris::cond_signal(_cond);
5901 assert_status(status == 0, status, "cond_signal");
5902 }
5903 }
5904
5905 // JSR166
5906 // -------------------------------------------------------
5907
5908 /*
5909 * The solaris and linux implementations of park/unpark are fairly
5910 * conservative for now, but can be improved. They currently use a
5911 * mutex/condvar pair, plus _counter.
5912 * Park decrements _counter if > 0, else does a condvar wait. Unpark
5913 * sets count to 1 and signals condvar. Only one thread ever waits
5914 * on the condvar. Contention seen when trying to park implies that someone
5915 * is unparking you, so don't wait. And spurious returns are fine, so there
5916 * is no need to track notifications.
5917 */
5918
5919 #define MAX_SECS 100000000
5920 /*
5921 * This code is common to linux and solaris and will be moved to a
5922 * common place in dolphin.
5923 *
5924 * The passed in time value is either a relative time in nanoseconds
5925 * or an absolute time in milliseconds. Either way it has to be unpacked
5926 * into suitable seconds and nanoseconds components and stored in the
5927 * given timespec structure.
5928 * Given time is a 64-bit value and the time_t used in the timespec is only
5929 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
5930 * overflow if times way in the future are given. Further on Solaris versions
5931 * prior to 10 there is a restriction (see cond_timedwait) that the specified
5932 * number of seconds, in abstime, is less than current_time + 100,000,000.
5933 * As it will be 28 years before "now + 100000000" will overflow we can
5934 * ignore overflow and just impose a hard-limit on seconds using the value
5935 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
5936 * years from "now".
5937 */
5938 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5939 assert (time > 0, "convertTime");
5940
5941 struct timeval now;
5942 int status = gettimeofday(&now, NULL);
5943 assert(status == 0, "gettimeofday");
5944
5945 time_t max_secs = now.tv_sec + MAX_SECS;
5946
5947 if (isAbsolute) {
5948 jlong secs = time / 1000;
5949 if (secs > max_secs) {
5950 absTime->tv_sec = max_secs;
5951 }
5952 else {
5953 absTime->tv_sec = secs;
5954 }
5955 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5956 }
5957 else {
5958 jlong secs = time / NANOSECS_PER_SEC;
5959 if (secs >= MAX_SECS) {
5960 absTime->tv_sec = max_secs;
5961 absTime->tv_nsec = 0;
5962 }
5963 else {
5964 absTime->tv_sec = now.tv_sec + secs;
5965 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5966 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5967 absTime->tv_nsec -= NANOSECS_PER_SEC;
5968 ++absTime->tv_sec; // note: this must be <= max_secs
5969 }
5970 }
5971 }
5972 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5973 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5974 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5975 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5976 }
5977
5978 void Parker::park(bool isAbsolute, jlong time) {
5979 // Ideally we'd do something useful while spinning, such
5980 // as calling unpackTime().
5981
5982 // Optional fast-path check:
5983 // Return immediately if a permit is available.
5984 // We depend on Atomic::xchg() having full barrier semantics
5985 // since we are doing a lock-free update to _counter.
5986 if (Atomic::xchg(0, &_counter) > 0) return;
5987
5988 // Optional fast-exit: Check interrupt before trying to wait
5989 Thread* thread = Thread::current();
5990 assert(thread->is_Java_thread(), "Must be JavaThread");
5991 JavaThread *jt = (JavaThread *)thread;
5992 if (Thread::is_interrupted(thread, false)) {
5993 return;
5994 }
5995
5996 // First, demultiplex/decode time arguments
5997 timespec absTime;
5998 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
5999 return;
6000 }
6001 if (time > 0) {
6002 // Warning: this code might be exposed to the old Solaris time
6003 // round-down bugs. Grep "roundingFix" for details.
6004 unpackTime(&absTime, isAbsolute, time);
6005 }
6006
6007 // Enter safepoint region
6008 // Beware of deadlocks such as 6317397.
6009 // The per-thread Parker:: _mutex is a classic leaf-lock.
6010 // In particular a thread must never block on the Threads_lock while
6011 // holding the Parker:: mutex. If safepoints are pending both the
6012 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
6013 ThreadBlockInVM tbivm(jt);
6014
6015 // Don't wait if cannot get lock since interference arises from
6016 // unblocking. Also. check interrupt before trying wait
6017 if (Thread::is_interrupted(thread, false) ||
6018 os::Solaris::mutex_trylock(_mutex) != 0) {
6019 return;
6020 }
6021
6022 int status ;
6023
6024 if (_counter > 0) { // no wait needed
6025 _counter = 0;
6026 status = os::Solaris::mutex_unlock(_mutex);
6027 assert (status == 0, "invariant") ;
6028 // Paranoia to ensure our locked and lock-free paths interact
6029 // correctly with each other and Java-level accesses.
6030 OrderAccess::fence();
6031 return;
6032 }
6033
6034 #ifdef ASSERT
6035 // Don't catch signals while blocked; let the running threads have the signals.
6036 // (This allows a debugger to break into the running thread.)
6037 sigset_t oldsigs;
6038 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
6039 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
6040 #endif
6041
6042 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
6043 jt->set_suspend_equivalent();
6044 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
6045
6046 // Do this the hard way by blocking ...
6047 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6048 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6049 // Only for SPARC >= V8PlusA
6050 #if defined(__sparc) && defined(COMPILER2)
6051 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6052 #endif
6053
6054 if (time == 0) {
6055 status = os::Solaris::cond_wait (_cond, _mutex) ;
6056 } else {
6057 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
6058 }
6059 // Note that an untimed cond_wait() can sometimes return ETIME on older
6060 // versions of the Solaris.
6061 assert_status(status == 0 || status == EINTR ||
6062 status == ETIME || status == ETIMEDOUT,
6063 status, "cond_timedwait");
6064
6065 #ifdef ASSERT
6066 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
6067 #endif
6068 _counter = 0 ;
6069 status = os::Solaris::mutex_unlock(_mutex);
6070 assert_status(status == 0, status, "mutex_unlock") ;
6071 // Paranoia to ensure our locked and lock-free paths interact
6072 // correctly with each other and Java-level accesses.
6073 OrderAccess::fence();
6074
6075 // If externally suspended while waiting, re-suspend
6076 if (jt->handle_special_suspend_equivalent_condition()) {
6077 jt->java_suspend_self();
6078 }
6079 }
6080
6081 void Parker::unpark() {
6082 int s, status ;
6083 status = os::Solaris::mutex_lock (_mutex) ;
6084 assert (status == 0, "invariant") ;
6085 s = _counter;
6086 _counter = 1;
6087 status = os::Solaris::mutex_unlock (_mutex) ;
6088 assert (status == 0, "invariant") ;
6089
6090 if (s < 1) {
6091 status = os::Solaris::cond_signal (_cond) ;
6092 assert (status == 0, "invariant") ;
6093 }
6094 }
6095
6096 extern char** environ;
6097
6098 // Run the specified command in a separate process. Return its exit value,
6099 // or -1 on failure (e.g. can't fork a new process).
6100 // Unlike system(), this function can be called from signal handler. It
6101 // doesn't block SIGINT et al.
6102 int os::fork_and_exec(char* cmd) {
6103 char * argv[4];
6104 argv[0] = (char *)"sh";
6105 argv[1] = (char *)"-c";
6106 argv[2] = cmd;
6107 argv[3] = NULL;
6108
6109 // fork is async-safe, fork1 is not so can't use in signal handler
6110 pid_t pid;
6111 Thread* t = ThreadLocalStorage::get_thread_slow();
6112 if (t != NULL && t->is_inside_signal_handler()) {
6113 pid = fork();
6114 } else {
6115 pid = fork1();
6116 }
6117
6118 if (pid < 0) {
6119 // fork failed
6120 warning("fork failed: %s", strerror(errno));
6121 return -1;
6122
6123 } else if (pid == 0) {
6124 // child process
6125
6126 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
6127 execve("/usr/bin/sh", argv, environ);
6128
6129 // execve failed
6130 _exit(-1);
6131
6132 } else {
6133 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
6134 // care about the actual exit code, for now.
6135
6136 int status;
6137
6138 // Wait for the child process to exit. This returns immediately if
6139 // the child has already exited. */
6140 while (waitpid(pid, &status, 0) < 0) {
6141 switch (errno) {
6142 case ECHILD: return 0;
6143 case EINTR: break;
6144 default: return -1;
6145 }
6146 }
6147
6148 if (WIFEXITED(status)) {
6149 // The child exited normally; get its exit code.
6150 return WEXITSTATUS(status);
6151 } else if (WIFSIGNALED(status)) {
6152 // The child exited because of a signal
6153 // The best value to return is 0x80 + signal number,
6154 // because that is what all Unix shells do, and because
6155 // it allows callers to distinguish between process exit and
6156 // process death by signal.
6157 return 0x80 + WTERMSIG(status);
6158 } else {
6159 // Unknown exit code; pass it through
6160 return status;
6161 }
6162 }
6163 }
6164
6165 // is_headless_jre()
6166 //
6167 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
6168 // in order to report if we are running in a headless jre
6169 //
6170 // Since JDK8 xawt/libmawt.so was moved into the same directory
6171 // as libawt.so, and renamed libawt_xawt.so
6172 //
6173 bool os::is_headless_jre() {
6174 struct stat statbuf;
6175 char buf[MAXPATHLEN];
6176 char libmawtpath[MAXPATHLEN];
6177 const char *xawtstr = "/xawt/libmawt.so";
6178 const char *new_xawtstr = "/libawt_xawt.so";
6179 char *p;
6180
6181 // Get path to libjvm.so
6182 os::jvm_path(buf, sizeof(buf));
6183
6184 // Get rid of libjvm.so
6185 p = strrchr(buf, '/');
6186 if (p == NULL) return false;
6187 else *p = '\0';
6188
6189 // Get rid of client or server
6190 p = strrchr(buf, '/');
6191 if (p == NULL) return false;
6192 else *p = '\0';
6193
6194 // check xawt/libmawt.so
6195 strcpy(libmawtpath, buf);
6196 strcat(libmawtpath, xawtstr);
6197 if (::stat(libmawtpath, &statbuf) == 0) return false;
6198
6199 // check libawt_xawt.so
6200 strcpy(libmawtpath, buf);
6201 strcat(libmawtpath, new_xawtstr);
6202 if (::stat(libmawtpath, &statbuf) == 0) return false;
6203
6204 return true;
6205 }
6206
6207 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
6208 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted);
6209 }
6210
6211 int os::close(int fd) {
6212 return ::close(fd);
6213 }
6214
6215 int os::socket_close(int fd) {
6216 return ::close(fd);
6217 }
6218
6219 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
6220 INTERRUPTIBLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6221 }
6222
6223 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
6224 INTERRUPTIBLE_RETURN_INT((int)::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6225 }
6226
6227 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
6228 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
6229 }
6230
6231 // As both poll and select can be interrupted by signals, we have to be
6232 // prepared to restart the system call after updating the timeout, unless
6233 // a poll() is done with timeout == -1, in which case we repeat with this
6234 // "wait forever" value.
6235
6236 int os::timeout(int fd, long timeout) {
6237 int res;
6238 struct timeval t;
6239 julong prevtime, newtime;
6240 static const char* aNull = 0;
6241 struct pollfd pfd;
6242 pfd.fd = fd;
6243 pfd.events = POLLIN;
6244
6245 gettimeofday(&t, &aNull);
6246 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
6247
6248 for(;;) {
6249 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted);
6250 if(res == OS_ERR && errno == EINTR) {
6251 if(timeout != -1) {
6252 gettimeofday(&t, &aNull);
6253 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000;
6254 timeout -= newtime - prevtime;
6255 if(timeout <= 0)
6256 return OS_OK;
6257 prevtime = newtime;
6258 }
6259 } else return res;
6260 }
6261 }
6262
6263 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
6264 int _result;
6265 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,\
6266 os::Solaris::clear_interrupted);
6267
6268 // Depending on when thread interruption is reset, _result could be
6269 // one of two values when errno == EINTR
6270
6271 if (((_result == OS_INTRPT) || (_result == OS_ERR))
6272 && (errno == EINTR)) {
6273 /* restarting a connect() changes its errno semantics */
6274 INTERRUPTIBLE(::connect(fd, him, len), _result,\
6275 os::Solaris::clear_interrupted);
6276 /* undo these changes */
6277 if (_result == OS_ERR) {
6278 if (errno == EALREADY) {
6279 errno = EINPROGRESS; /* fall through */
6280 } else if (errno == EISCONN) {
6281 errno = 0;
6282 return OS_OK;
6283 }
6284 }
6285 }
6286 return _result;
6287 }
6288
6289 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
6290 if (fd < 0) {
6291 return OS_ERR;
6292 }
6293 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, len),\
6294 os::Solaris::clear_interrupted);
6295 }
6296
6297 int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
6298 sockaddr* from, socklen_t* fromlen) {
6299 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen),\
6300 os::Solaris::clear_interrupted);
6301 }
6302
6303 int os::sendto(int fd, char* buf, size_t len, uint flags,
6304 struct sockaddr* to, socklen_t tolen) {
6305 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen),\
6306 os::Solaris::clear_interrupted);
6307 }
6308
6309 int os::socket_available(int fd, jint *pbytes) {
6310 if (fd < 0) {
6311 return OS_OK;
6312 }
6313 int ret;
6314 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
6315 // note: ioctl can return 0 when successful, JVM_SocketAvailable
6316 // is expected to return 0 on failure and 1 on success to the jdk.
6317 return (ret == OS_ERR) ? 0 : 1;
6318 }
6319
6320 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
6321 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\
6322 os::Solaris::clear_interrupted);
6323 }
6324
6325 // Get the default path to the core file
6326 // Returns the length of the string
6327 int os::get_core_path(char* buffer, size_t bufferSize) {
6328 const char* p = get_current_directory(buffer, bufferSize);
6329
6330 if (p == NULL) {
6331 assert(p != NULL, "failed to get current directory");
6332 return 0;
6333 }
6334
6335 return strlen(buffer);
6336 }
6337
6338 #ifndef PRODUCT
6339 void TestReserveMemorySpecial_test() {
6340 // No tests available for this platform
6341 }
6342 #endif