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