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