Mon, 09 Mar 2009 13:28:46 -0700
6814575: Update copyright year
Summary: Update copyright for files that have been modified in 2009, up to 03/09
Reviewed-by: katleman, tbell, ohair
1 /*
2 * Copyright 1997-2009 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 */
25 // do not include precompiled header file
26 # include "incls/_os_solaris.cpp.incl"
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>
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>
70 #define MAX_PATH (2 * K)
72 // for timer info max values which include all bits
73 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
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
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.
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.
98 */
100 #ifndef MC_HAT_ADVISE
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 */
111 #endif
112 // MPSS Changes End.
115 // Here are some liblgrp types from sys/lgrp_user.h to be able to
116 // compile on older systems without this header file.
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
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
132 // Some more macros from sys/mman.h that are not present in Solaris 8.
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 */
151 /* maximum number of addresses meminfo() can process at a time */
152 # define MAX_MEMINFO_CNT 256
154 /* maximum number of request types */
155 # define MAX_MEMINFO_REQ 31
156 #endif
158 // see thr_setprio(3T) for the basis of these numbers
159 #define MinimumPriority 0
160 #define NormalPriority 64
161 #define MaximumPriority 127
163 // Values for ThreadPriorityPolicy == 1
164 int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64,
165 80, 96, 112, 124, 127 };
167 // System parameters used internally
168 static clock_t clock_tics_per_sec = 100;
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;
175 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
176 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
178 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
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; }
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 }
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 }
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};
204 #ifndef PRODUCT
205 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
207 int ThreadLocalStorage::_tcacheHit = 0;
208 int ThreadLocalStorage::_tcacheMiss = 0;
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
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");
229 thread->_self_raw_id = raw_id; // mark for quick retrieval
230 _get_thread_cache[ index ] = thread;
231 }
232 return thread;
233 }
236 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0};
237 #define NO_CACHED_THREAD ((Thread*)all_zero)
239 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
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);
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 }
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 }
258 // Invalidate all the caches (happens to be the same as pd_init).
259 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
261 #undef NO_CACHED_THREAD
263 // END Thread Local Storage
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 }
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 }
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;
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 }
308 size_t os::current_stack_size() {
309 size_t size;
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 }
326 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
327 return localtime_r(clock, res);
328 }
330 // interruptible infrastructure
332 // setup_interruptible saves the thread state before going into an
333 // interruptible system call.
334 // The saved state is used to restore the thread to
335 // its former state whether or not an interrupt is received.
336 // Used by classloader os::read
337 // hpi calls skip this layer and stay in _thread_in_native
339 void os::Solaris::setup_interruptible(JavaThread* thread) {
341 JavaThreadState thread_state = thread->thread_state();
343 assert(thread_state != _thread_blocked, "Coming from the wrong thread");
344 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible");
345 OSThread* osthread = thread->osthread();
346 osthread->set_saved_interrupt_thread_state(thread_state);
347 thread->frame_anchor()->make_walkable(thread);
348 ThreadStateTransition::transition(thread, thread_state, _thread_blocked);
349 }
351 // Version of setup_interruptible() for threads that are already in
352 // _thread_blocked. Used by os_sleep().
353 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) {
354 thread->frame_anchor()->make_walkable(thread);
355 }
357 JavaThread* os::Solaris::setup_interruptible() {
358 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
359 setup_interruptible(thread);
360 return thread;
361 }
363 void os::Solaris::try_enable_extended_io() {
364 typedef int (*enable_extended_FILE_stdio_t)(int, int);
366 if (!UseExtendedFileIO) {
367 return;
368 }
370 enable_extended_FILE_stdio_t enabler =
371 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
372 "enable_extended_FILE_stdio");
373 if (enabler) {
374 enabler(-1, -1);
375 }
376 }
379 #ifdef ASSERT
381 JavaThread* os::Solaris::setup_interruptible_native() {
382 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
383 JavaThreadState thread_state = thread->thread_state();
384 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
385 return thread;
386 }
388 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) {
389 JavaThreadState thread_state = thread->thread_state();
390 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
391 }
392 #endif
394 // cleanup_interruptible reverses the effects of setup_interruptible
395 // setup_interruptible_already_blocked() does not need any cleanup.
397 void os::Solaris::cleanup_interruptible(JavaThread* thread) {
398 OSThread* osthread = thread->osthread();
400 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state());
401 }
403 // I/O interruption related counters called in _INTERRUPTIBLE
405 void os::Solaris::bump_interrupted_before_count() {
406 RuntimeService::record_interrupted_before_count();
407 }
409 void os::Solaris::bump_interrupted_during_count() {
410 RuntimeService::record_interrupted_during_count();
411 }
413 static int _processors_online = 0;
415 jint os::Solaris::_os_thread_limit = 0;
416 volatile jint os::Solaris::_os_thread_count = 0;
418 julong os::available_memory() {
419 return Solaris::available_memory();
420 }
422 julong os::Solaris::available_memory() {
423 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
424 }
426 julong os::Solaris::_physical_memory = 0;
428 julong os::physical_memory() {
429 return Solaris::physical_memory();
430 }
432 julong os::allocatable_physical_memory(julong size) {
433 #ifdef _LP64
434 return size;
435 #else
436 julong result = MIN2(size, (julong)3835*M);
437 if (!is_allocatable(result)) {
438 // Memory allocations will be aligned but the alignment
439 // is not known at this point. Alignments will
440 // be at most to LargePageSizeInBytes. Protect
441 // allocations from alignments up to illegal
442 // values. If at this point 2G is illegal.
443 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes;
444 result = MIN2(size, reasonable_size);
445 }
446 return result;
447 #endif
448 }
450 static hrtime_t first_hrtime = 0;
451 static const hrtime_t hrtime_hz = 1000*1000*1000;
452 const int LOCK_BUSY = 1;
453 const int LOCK_FREE = 0;
454 const int LOCK_INVALID = -1;
455 static volatile hrtime_t max_hrtime = 0;
456 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress
459 void os::Solaris::initialize_system_info() {
460 _processor_count = sysconf(_SC_NPROCESSORS_CONF);
461 _processors_online = sysconf (_SC_NPROCESSORS_ONLN);
462 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
463 }
465 int os::active_processor_count() {
466 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
467 pid_t pid = getpid();
468 psetid_t pset = PS_NONE;
469 // Are we running in a processor set or is there any processor set around?
470 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
471 uint_t pset_cpus;
472 // Query the number of cpus available to us.
473 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
474 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
475 _processors_online = pset_cpus;
476 return pset_cpus;
477 }
478 }
479 // Otherwise return number of online cpus
480 return online_cpus;
481 }
483 static bool find_processors_in_pset(psetid_t pset,
484 processorid_t** id_array,
485 uint_t* id_length) {
486 bool result = false;
487 // Find the number of processors in the processor set.
488 if (pset_info(pset, NULL, id_length, NULL) == 0) {
489 // Make up an array to hold their ids.
490 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length);
491 // Fill in the array with their processor ids.
492 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
493 result = true;
494 }
495 }
496 return result;
497 }
499 // Callers of find_processors_online() must tolerate imprecise results --
500 // the system configuration can change asynchronously because of DR
501 // or explicit psradm operations.
502 //
503 // We also need to take care that the loop (below) terminates as the
504 // number of processors online can change between the _SC_NPROCESSORS_ONLN
505 // request and the loop that builds the list of processor ids. Unfortunately
506 // there's no reliable way to determine the maximum valid processor id,
507 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
508 // man pages, which claim the processor id set is "sparse, but
509 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
510 // exit the loop.
511 //
512 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
513 // not available on S8.0.
515 static bool find_processors_online(processorid_t** id_array,
516 uint* id_length) {
517 const processorid_t MAX_PROCESSOR_ID = 100000 ;
518 // Find the number of processors online.
519 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
520 // Make up an array to hold their ids.
521 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length);
522 // Processors need not be numbered consecutively.
523 long found = 0;
524 processorid_t next = 0;
525 while (found < *id_length && next < MAX_PROCESSOR_ID) {
526 processor_info_t info;
527 if (processor_info(next, &info) == 0) {
528 // NB, PI_NOINTR processors are effectively online ...
529 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
530 (*id_array)[found] = next;
531 found += 1;
532 }
533 }
534 next += 1;
535 }
536 if (found < *id_length) {
537 // The loop above didn't identify the expected number of processors.
538 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
539 // and re-running the loop, above, but there's no guarantee of progress
540 // if the system configuration is in flux. Instead, we just return what
541 // we've got. Note that in the worst case find_processors_online() could
542 // return an empty set. (As a fall-back in the case of the empty set we
543 // could just return the ID of the current processor).
544 *id_length = found ;
545 }
547 return true;
548 }
550 static bool assign_distribution(processorid_t* id_array,
551 uint id_length,
552 uint* distribution,
553 uint distribution_length) {
554 // We assume we can assign processorid_t's to uint's.
555 assert(sizeof(processorid_t) == sizeof(uint),
556 "can't convert processorid_t to uint");
557 // Quick check to see if we won't succeed.
558 if (id_length < distribution_length) {
559 return false;
560 }
561 // Assign processor ids to the distribution.
562 // Try to shuffle processors to distribute work across boards,
563 // assuming 4 processors per board.
564 const uint processors_per_board = ProcessDistributionStride;
565 // Find the maximum processor id.
566 processorid_t max_id = 0;
567 for (uint m = 0; m < id_length; m += 1) {
568 max_id = MAX2(max_id, id_array[m]);
569 }
570 // The next id, to limit loops.
571 const processorid_t limit_id = max_id + 1;
572 // Make up markers for available processors.
573 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id);
574 for (uint c = 0; c < limit_id; c += 1) {
575 available_id[c] = false;
576 }
577 for (uint a = 0; a < id_length; a += 1) {
578 available_id[id_array[a]] = true;
579 }
580 // Step by "boards", then by "slot", copying to "assigned".
581 // NEEDS_CLEANUP: The assignment of processors should be stateful,
582 // remembering which processors have been assigned by
583 // previous calls, etc., so as to distribute several
584 // independent calls of this method. What we'd like is
585 // It would be nice to have an API that let us ask
586 // how many processes are bound to a processor,
587 // but we don't have that, either.
588 // In the short term, "board" is static so that
589 // subsequent distributions don't all start at board 0.
590 static uint board = 0;
591 uint assigned = 0;
592 // Until we've found enough processors ....
593 while (assigned < distribution_length) {
594 // ... find the next available processor in the board.
595 for (uint slot = 0; slot < processors_per_board; slot += 1) {
596 uint try_id = board * processors_per_board + slot;
597 if ((try_id < limit_id) && (available_id[try_id] == true)) {
598 distribution[assigned] = try_id;
599 available_id[try_id] = false;
600 assigned += 1;
601 break;
602 }
603 }
604 board += 1;
605 if (board * processors_per_board + 0 >= limit_id) {
606 board = 0;
607 }
608 }
609 if (available_id != NULL) {
610 FREE_C_HEAP_ARRAY(bool, available_id);
611 }
612 return true;
613 }
615 bool os::distribute_processes(uint length, uint* distribution) {
616 bool result = false;
617 // Find the processor id's of all the available CPUs.
618 processorid_t* id_array = NULL;
619 uint id_length = 0;
620 // There are some races between querying information and using it,
621 // since processor sets can change dynamically.
622 psetid_t pset = PS_NONE;
623 // Are we running in a processor set?
624 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
625 result = find_processors_in_pset(pset, &id_array, &id_length);
626 } else {
627 result = find_processors_online(&id_array, &id_length);
628 }
629 if (result == true) {
630 if (id_length >= length) {
631 result = assign_distribution(id_array, id_length, distribution, length);
632 } else {
633 result = false;
634 }
635 }
636 if (id_array != NULL) {
637 FREE_C_HEAP_ARRAY(processorid_t, id_array);
638 }
639 return result;
640 }
642 bool os::bind_to_processor(uint processor_id) {
643 // We assume that a processorid_t can be stored in a uint.
644 assert(sizeof(uint) == sizeof(processorid_t),
645 "can't convert uint to processorid_t");
646 int bind_result =
647 processor_bind(P_LWPID, // bind LWP.
648 P_MYID, // bind current LWP.
649 (processorid_t) processor_id, // id.
650 NULL); // don't return old binding.
651 return (bind_result == 0);
652 }
654 bool os::getenv(const char* name, char* buffer, int len) {
655 char* val = ::getenv( name );
656 if ( val == NULL
657 || strlen(val) + 1 > len ) {
658 if (len > 0) buffer[0] = 0; // return a null string
659 return false;
660 }
661 strcpy( buffer, val );
662 return true;
663 }
666 // Return true if user is running as root.
668 bool os::have_special_privileges() {
669 static bool init = false;
670 static bool privileges = false;
671 if (!init) {
672 privileges = (getuid() != geteuid()) || (getgid() != getegid());
673 init = true;
674 }
675 return privileges;
676 }
679 static char* get_property(char* name, char* buffer, int buffer_size) {
680 if (os::getenv(name, buffer, buffer_size)) {
681 return buffer;
682 }
683 static char empty[] = "";
684 return empty;
685 }
688 void os::init_system_properties_values() {
689 char arch[12];
690 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch));
692 // The next steps are taken in the product version:
693 //
694 // Obtain the JAVA_HOME value from the location of libjvm[_g].so.
695 // This library should be located at:
696 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so.
697 //
698 // If "/jre/lib/" appears at the right place in the path, then we
699 // assume libjvm[_g].so is installed in a JDK and we use this path.
700 //
701 // Otherwise exit with message: "Could not create the Java virtual machine."
702 //
703 // The following extra steps are taken in the debugging version:
704 //
705 // If "/jre/lib/" does NOT appear at the right place in the path
706 // instead of exit check for $JAVA_HOME environment variable.
707 //
708 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
709 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so
710 // it looks like libjvm[_g].so is installed there
711 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so.
712 //
713 // Otherwise exit.
714 //
715 // Important note: if the location of libjvm.so changes this
716 // code needs to be changed accordingly.
718 // The next few definitions allow the code to be verbatim:
719 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n))
720 #define free(p) FREE_C_HEAP_ARRAY(char, p)
721 #define getenv(n) ::getenv(n)
723 #define EXTENSIONS_DIR "/lib/ext"
724 #define ENDORSED_DIR "/lib/endorsed"
725 #define COMMON_DIR "/usr/jdk/packages"
727 {
728 /* sysclasspath, java_home, dll_dir */
729 {
730 char *home_path;
731 char *dll_path;
732 char *pslash;
733 char buf[MAXPATHLEN];
734 os::jvm_path(buf, sizeof(buf));
736 // Found the full path to libjvm.so.
737 // Now cut the path to <java_home>/jre if we can.
738 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */
739 pslash = strrchr(buf, '/');
740 if (pslash != NULL)
741 *pslash = '\0'; /* get rid of /{client|server|hotspot} */
742 dll_path = malloc(strlen(buf) + 1);
743 if (dll_path == NULL)
744 return;
745 strcpy(dll_path, buf);
746 Arguments::set_dll_dir(dll_path);
748 if (pslash != NULL) {
749 pslash = strrchr(buf, '/');
750 if (pslash != NULL) {
751 *pslash = '\0'; /* get rid of /<arch> */
752 pslash = strrchr(buf, '/');
753 if (pslash != NULL)
754 *pslash = '\0'; /* get rid of /lib */
755 }
756 }
758 home_path = malloc(strlen(buf) + 1);
759 if (home_path == NULL)
760 return;
761 strcpy(home_path, buf);
762 Arguments::set_java_home(home_path);
764 if (!set_boot_path('/', ':'))
765 return;
766 }
768 /*
769 * Where to look for native libraries
770 */
771 {
772 // Use dlinfo() to determine the correct java.library.path.
773 //
774 // If we're launched by the Java launcher, and the user
775 // does not set java.library.path explicitly on the commandline,
776 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
777 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
778 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
779 // /usr/lib), which is exactly what we want.
780 //
781 // If the user does set java.library.path, it completely
782 // overwrites this setting, and always has.
783 //
784 // If we're not launched by the Java launcher, we may
785 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
786 // settings. Again, dlinfo does exactly what we want.
788 Dl_serinfo _info, *info = &_info;
789 Dl_serpath *path;
790 char* library_path;
791 char *common_path;
792 int i;
794 // determine search path count and required buffer size
795 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
796 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
797 }
799 // allocate new buffer and initialize
800 info = (Dl_serinfo*)malloc(_info.dls_size);
801 if (info == NULL) {
802 vm_exit_out_of_memory(_info.dls_size,
803 "init_system_properties_values info");
804 }
805 info->dls_size = _info.dls_size;
806 info->dls_cnt = _info.dls_cnt;
808 // obtain search path information
809 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
810 free(info);
811 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
812 }
814 path = &info->dls_serpath[0];
816 // Note: Due to a legacy implementation, most of the library path
817 // is set in the launcher. This was to accomodate linking restrictions
818 // on legacy Solaris implementations (which are no longer supported).
819 // Eventually, all the library path setting will be done here.
820 //
821 // However, to prevent the proliferation of improperly built native
822 // libraries, the new path component /usr/jdk/packages is added here.
824 // Determine the actual CPU architecture.
825 char cpu_arch[12];
826 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
827 #ifdef _LP64
828 // If we are a 64-bit vm, perform the following translations:
829 // sparc -> sparcv9
830 // i386 -> amd64
831 if (strcmp(cpu_arch, "sparc") == 0)
832 strcat(cpu_arch, "v9");
833 else if (strcmp(cpu_arch, "i386") == 0)
834 strcpy(cpu_arch, "amd64");
835 #endif
837 // Construct the invariant part of ld_library_path. Note that the
838 // space for the colon and the trailing null are provided by the
839 // nulls included by the sizeof operator.
840 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch);
841 common_path = malloc(bufsize);
842 if (common_path == NULL) {
843 free(info);
844 vm_exit_out_of_memory(bufsize,
845 "init_system_properties_values common_path");
846 }
847 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch);
849 // struct size is more than sufficient for the path components obtained
850 // through the dlinfo() call, so only add additional space for the path
851 // components explicitly added here.
852 bufsize = info->dls_size + strlen(common_path);
853 library_path = malloc(bufsize);
854 if (library_path == NULL) {
855 free(info);
856 free(common_path);
857 vm_exit_out_of_memory(bufsize,
858 "init_system_properties_values library_path");
859 }
860 library_path[0] = '\0';
862 // Construct the desired Java library path from the linker's library
863 // search path.
864 //
865 // For compatibility, it is optimal that we insert the additional path
866 // components specific to the Java VM after those components specified
867 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
868 // infrastructure.
869 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it
870 strcpy(library_path, common_path);
871 } else {
872 int inserted = 0;
873 for (i = 0; i < info->dls_cnt; i++, path++) {
874 uint_t flags = path->dls_flags & LA_SER_MASK;
875 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
876 strcat(library_path, common_path);
877 strcat(library_path, os::path_separator());
878 inserted = 1;
879 }
880 strcat(library_path, path->dls_name);
881 strcat(library_path, os::path_separator());
882 }
883 // eliminate trailing path separator
884 library_path[strlen(library_path)-1] = '\0';
885 }
887 // happens before argument parsing - can't use a trace flag
888 // tty->print_raw("init_system_properties_values: native lib path: ");
889 // tty->print_raw_cr(library_path);
891 // callee copies into its own buffer
892 Arguments::set_library_path(library_path);
894 free(common_path);
895 free(library_path);
896 free(info);
897 }
899 /*
900 * Extensions directories.
901 *
902 * Note that the space for the colon and the trailing null are provided
903 * by the nulls included by the sizeof operator (so actually one byte more
904 * than necessary is allocated).
905 */
906 {
907 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) +
908 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) +
909 sizeof(EXTENSIONS_DIR));
910 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR,
911 Arguments::get_java_home());
912 Arguments::set_ext_dirs(buf);
913 }
915 /* Endorsed standards default directory. */
916 {
917 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR));
918 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
919 Arguments::set_endorsed_dirs(buf);
920 }
921 }
923 #undef malloc
924 #undef free
925 #undef getenv
926 #undef EXTENSIONS_DIR
927 #undef ENDORSED_DIR
928 #undef COMMON_DIR
930 }
932 void os::breakpoint() {
933 BREAKPOINT;
934 }
936 bool os::obsolete_option(const JavaVMOption *option)
937 {
938 if (!strncmp(option->optionString, "-Xt", 3)) {
939 return true;
940 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
941 return true;
942 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
943 return true;
944 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
945 return true;
946 }
947 return false;
948 }
950 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
951 address stackStart = (address)thread->stack_base();
952 address stackEnd = (address)(stackStart - (address)thread->stack_size());
953 if (sp < stackStart && sp >= stackEnd ) return true;
954 return false;
955 }
957 extern "C" void breakpoint() {
958 // use debugger to set breakpoint here
959 }
961 // Returns an estimate of the current stack pointer. Result must be guaranteed to
962 // point into the calling threads stack, and be no lower than the current stack
963 // pointer.
964 address os::current_stack_pointer() {
965 volatile int dummy;
966 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right
967 return sp;
968 }
970 static thread_t main_thread;
972 // Thread start routine for all new Java threads
973 extern "C" void* java_start(void* thread_addr) {
974 // Try to randomize the cache line index of hot stack frames.
975 // This helps when threads of the same stack traces evict each other's
976 // cache lines. The threads can be either from the same JVM instance, or
977 // from different JVM instances. The benefit is especially true for
978 // processors with hyperthreading technology.
979 static int counter = 0;
980 int pid = os::current_process_id();
981 alloca(((pid ^ counter++) & 7) * 128);
983 int prio;
984 Thread* thread = (Thread*)thread_addr;
985 OSThread* osthr = thread->osthread();
987 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound
988 thread->_schedctl = (void *) schedctl_init () ;
990 if (UseNUMA) {
991 int lgrp_id = os::numa_get_group_id();
992 if (lgrp_id != -1) {
993 thread->set_lgrp_id(lgrp_id);
994 }
995 }
997 // If the creator called set priority before we started,
998 // we need to call set priority now that we have an lwp.
999 // Get the priority from libthread and set the priority
1000 // for the new Solaris lwp.
1001 if ( osthr->thread_id() != -1 ) {
1002 if ( UseThreadPriorities ) {
1003 thr_getprio(osthr->thread_id(), &prio);
1004 if (ThreadPriorityVerbose) {
1005 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n",
1006 osthr->thread_id(), osthr->lwp_id(), prio );
1007 }
1008 os::set_native_priority(thread, prio);
1009 }
1010 } else if (ThreadPriorityVerbose) {
1011 warning("Can't set priority in _start routine, thread id hasn't been set\n");
1012 }
1014 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
1016 // initialize signal mask for this thread
1017 os::Solaris::hotspot_sigmask(thread);
1019 thread->run();
1021 // One less thread is executing
1022 // When the VMThread gets here, the main thread may have already exited
1023 // which frees the CodeHeap containing the Atomic::dec code
1024 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
1025 Atomic::dec(&os::Solaris::_os_thread_count);
1026 }
1028 if (UseDetachedThreads) {
1029 thr_exit(NULL);
1030 ShouldNotReachHere();
1031 }
1032 return NULL;
1033 }
1035 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
1036 // Allocate the OSThread object
1037 OSThread* osthread = new OSThread(NULL, NULL);
1038 if (osthread == NULL) return NULL;
1040 // Store info on the Solaris thread into the OSThread
1041 osthread->set_thread_id(thread_id);
1042 osthread->set_lwp_id(_lwp_self());
1043 thread->_schedctl = (void *) schedctl_init () ;
1045 if (UseNUMA) {
1046 int lgrp_id = os::numa_get_group_id();
1047 if (lgrp_id != -1) {
1048 thread->set_lgrp_id(lgrp_id);
1049 }
1050 }
1052 if ( ThreadPriorityVerbose ) {
1053 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
1054 osthread->thread_id(), osthread->lwp_id() );
1055 }
1057 // Initial thread state is INITIALIZED, not SUSPENDED
1058 osthread->set_state(INITIALIZED);
1060 return osthread;
1061 }
1063 void os::Solaris::hotspot_sigmask(Thread* thread) {
1065 //Save caller's signal mask
1066 sigset_t sigmask;
1067 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
1068 OSThread *osthread = thread->osthread();
1069 osthread->set_caller_sigmask(sigmask);
1071 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
1072 if (!ReduceSignalUsage) {
1073 if (thread->is_VM_thread()) {
1074 // Only the VM thread handles BREAK_SIGNAL ...
1075 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
1076 } else {
1077 // ... all other threads block BREAK_SIGNAL
1078 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
1079 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
1080 }
1081 }
1082 }
1084 bool os::create_attached_thread(JavaThread* thread) {
1085 #ifdef ASSERT
1086 thread->verify_not_published();
1087 #endif
1088 OSThread* osthread = create_os_thread(thread, thr_self());
1089 if (osthread == NULL) {
1090 return false;
1091 }
1093 // Initial thread state is RUNNABLE
1094 osthread->set_state(RUNNABLE);
1095 thread->set_osthread(osthread);
1097 // initialize signal mask for this thread
1098 // and save the caller's signal mask
1099 os::Solaris::hotspot_sigmask(thread);
1101 return true;
1102 }
1104 bool os::create_main_thread(JavaThread* thread) {
1105 #ifdef ASSERT
1106 thread->verify_not_published();
1107 #endif
1108 if (_starting_thread == NULL) {
1109 _starting_thread = create_os_thread(thread, main_thread);
1110 if (_starting_thread == NULL) {
1111 return false;
1112 }
1113 }
1115 // The primodial thread is runnable from the start
1116 _starting_thread->set_state(RUNNABLE);
1118 thread->set_osthread(_starting_thread);
1120 // initialize signal mask for this thread
1121 // and save the caller's signal mask
1122 os::Solaris::hotspot_sigmask(thread);
1124 return true;
1125 }
1127 // _T2_libthread is true if we believe we are running with the newer
1128 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default)
1129 bool os::Solaris::_T2_libthread = false;
1131 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
1132 // Allocate the OSThread object
1133 OSThread* osthread = new OSThread(NULL, NULL);
1134 if (osthread == NULL) {
1135 return false;
1136 }
1138 if ( ThreadPriorityVerbose ) {
1139 char *thrtyp;
1140 switch ( thr_type ) {
1141 case vm_thread:
1142 thrtyp = (char *)"vm";
1143 break;
1144 case cgc_thread:
1145 thrtyp = (char *)"cgc";
1146 break;
1147 case pgc_thread:
1148 thrtyp = (char *)"pgc";
1149 break;
1150 case java_thread:
1151 thrtyp = (char *)"java";
1152 break;
1153 case compiler_thread:
1154 thrtyp = (char *)"compiler";
1155 break;
1156 case watcher_thread:
1157 thrtyp = (char *)"watcher";
1158 break;
1159 default:
1160 thrtyp = (char *)"unknown";
1161 break;
1162 }
1163 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
1164 }
1166 // Calculate stack size if it's not specified by caller.
1167 if (stack_size == 0) {
1168 // The default stack size 1M (2M for LP64).
1169 stack_size = (BytesPerWord >> 2) * K * K;
1171 switch (thr_type) {
1172 case os::java_thread:
1173 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
1174 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
1175 break;
1176 case os::compiler_thread:
1177 if (CompilerThreadStackSize > 0) {
1178 stack_size = (size_t)(CompilerThreadStackSize * K);
1179 break;
1180 } // else fall through:
1181 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1182 case os::vm_thread:
1183 case os::pgc_thread:
1184 case os::cgc_thread:
1185 case os::watcher_thread:
1186 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1187 break;
1188 }
1189 }
1190 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1192 // Initial state is ALLOCATED but not INITIALIZED
1193 osthread->set_state(ALLOCATED);
1195 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1196 // We got lots of threads. Check if we still have some address space left.
1197 // Need to be at least 5Mb of unreserved address space. We do check by
1198 // trying to reserve some.
1199 const size_t VirtualMemoryBangSize = 20*K*K;
1200 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1201 if (mem == NULL) {
1202 delete osthread;
1203 return false;
1204 } else {
1205 // Release the memory again
1206 os::release_memory(mem, VirtualMemoryBangSize);
1207 }
1208 }
1210 // Setup osthread because the child thread may need it.
1211 thread->set_osthread(osthread);
1213 // Create the Solaris thread
1214 // explicit THR_BOUND for T2_libthread case in case
1215 // that assumption is not accurate, but our alternate signal stack
1216 // handling is based on it which must have bound threads
1217 thread_t tid = 0;
1218 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED
1219 | ((UseBoundThreads || os::Solaris::T2_libthread() ||
1220 (thr_type == vm_thread) ||
1221 (thr_type == cgc_thread) ||
1222 (thr_type == pgc_thread) ||
1223 (thr_type == compiler_thread && BackgroundCompilation)) ?
1224 THR_BOUND : 0);
1225 int status;
1227 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs.
1228 //
1229 // On multiprocessors systems, libthread sometimes under-provisions our
1230 // process with LWPs. On a 30-way systems, for instance, we could have
1231 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned
1232 // to our process. This can result in under utilization of PEs.
1233 // I suspect the problem is related to libthread's LWP
1234 // pool management and to the kernel's SIGBLOCKING "last LWP parked"
1235 // upcall policy.
1236 //
1237 // The following code is palliative -- it attempts to ensure that our
1238 // process has sufficient LWPs to take advantage of multiple PEs.
1239 // Proper long-term cures include using user-level threads bound to LWPs
1240 // (THR_BOUND) or using LWP-based synchronization. Note that there is a
1241 // slight timing window with respect to sampling _os_thread_count, but
1242 // the race is benign. Also, we should periodically recompute
1243 // _processors_online as the min of SC_NPROCESSORS_ONLN and the
1244 // the number of PEs in our partition. You might be tempted to use
1245 // THR_NEW_LWP here, but I'd recommend against it as that could
1246 // result in undesirable growth of the libthread's LWP pool.
1247 // The fix below isn't sufficient; for instance, it doesn't take into count
1248 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks.
1249 //
1250 // Some pathologies this scheme doesn't handle:
1251 // * Threads can block, releasing the LWPs. The LWPs can age out.
1252 // When a large number of threads become ready again there aren't
1253 // enough LWPs available to service them. This can occur when the
1254 // number of ready threads oscillates.
1255 // * LWPs/Threads park on IO, thus taking the LWP out of circulation.
1256 //
1257 // Finally, we should call thr_setconcurrency() periodically to refresh
1258 // the LWP pool and thwart the LWP age-out mechanism.
1259 // The "+3" term provides a little slop -- we want to slightly overprovision.
1261 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) {
1262 if (!(flags & THR_BOUND)) {
1263 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation
1264 }
1265 }
1266 // Although this doesn't hurt, we should warn of undefined behavior
1267 // when using unbound T1 threads with schedctl(). This should never
1268 // happen, as the compiler and VM threads are always created bound
1269 DEBUG_ONLY(
1270 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) &&
1271 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) &&
1272 ((thr_type == vm_thread) || (thr_type == cgc_thread) ||
1273 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) {
1274 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound");
1275 }
1276 );
1279 // Mark that we don't have an lwp or thread id yet.
1280 // In case we attempt to set the priority before the thread starts.
1281 osthread->set_lwp_id(-1);
1282 osthread->set_thread_id(-1);
1284 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1285 if (status != 0) {
1286 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1287 perror("os::create_thread");
1288 }
1289 thread->set_osthread(NULL);
1290 // Need to clean up stuff we've allocated so far
1291 delete osthread;
1292 return false;
1293 }
1295 Atomic::inc(&os::Solaris::_os_thread_count);
1297 // Store info on the Solaris thread into the OSThread
1298 osthread->set_thread_id(tid);
1300 // Remember that we created this thread so we can set priority on it
1301 osthread->set_vm_created();
1303 // Set the default thread priority otherwise use NormalPriority
1305 if ( UseThreadPriorities ) {
1306 thr_setprio(tid, (DefaultThreadPriority == -1) ?
1307 java_to_os_priority[NormPriority] :
1308 DefaultThreadPriority);
1309 }
1311 // Initial thread state is INITIALIZED, not SUSPENDED
1312 osthread->set_state(INITIALIZED);
1314 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1315 return true;
1316 }
1318 /* defined for >= Solaris 10. This allows builds on earlier versions
1319 * of Solaris to take advantage of the newly reserved Solaris JVM signals
1320 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1321 * and -XX:+UseAltSigs does nothing since these should have no conflict
1322 */
1323 #if !defined(SIGJVM1)
1324 #define SIGJVM1 39
1325 #define SIGJVM2 40
1326 #endif
1328 debug_only(static bool signal_sets_initialized = false);
1329 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1330 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1331 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1333 bool os::Solaris::is_sig_ignored(int sig) {
1334 struct sigaction oact;
1335 sigaction(sig, (struct sigaction*)NULL, &oact);
1336 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1337 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1338 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
1339 return true;
1340 else
1341 return false;
1342 }
1344 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1345 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1346 static bool isJVM1available() {
1347 return SIGJVM1 < SIGRTMIN;
1348 }
1350 void os::Solaris::signal_sets_init() {
1351 // Should also have an assertion stating we are still single-threaded.
1352 assert(!signal_sets_initialized, "Already initialized");
1353 // Fill in signals that are necessarily unblocked for all threads in
1354 // the VM. Currently, we unblock the following signals:
1355 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1356 // by -Xrs (=ReduceSignalUsage));
1357 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1358 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1359 // the dispositions or masks wrt these signals.
1360 // Programs embedding the VM that want to use the above signals for their
1361 // own purposes must, at this time, use the "-Xrs" option to prevent
1362 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1363 // (See bug 4345157, and other related bugs).
1364 // In reality, though, unblocking these signals is really a nop, since
1365 // these signals are not blocked by default.
1366 sigemptyset(&unblocked_sigs);
1367 sigemptyset(&allowdebug_blocked_sigs);
1368 sigaddset(&unblocked_sigs, SIGILL);
1369 sigaddset(&unblocked_sigs, SIGSEGV);
1370 sigaddset(&unblocked_sigs, SIGBUS);
1371 sigaddset(&unblocked_sigs, SIGFPE);
1373 if (isJVM1available) {
1374 os::Solaris::set_SIGinterrupt(SIGJVM1);
1375 os::Solaris::set_SIGasync(SIGJVM2);
1376 } else if (UseAltSigs) {
1377 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1378 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1379 } else {
1380 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1381 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1382 }
1384 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1385 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1387 if (!ReduceSignalUsage) {
1388 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1389 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1390 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1391 }
1392 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1393 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1394 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1395 }
1396 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1397 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1398 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1399 }
1400 }
1401 // Fill in signals that are blocked by all but the VM thread.
1402 sigemptyset(&vm_sigs);
1403 if (!ReduceSignalUsage)
1404 sigaddset(&vm_sigs, BREAK_SIGNAL);
1405 debug_only(signal_sets_initialized = true);
1407 // For diagnostics only used in run_periodic_checks
1408 sigemptyset(&check_signal_done);
1409 }
1411 // These are signals that are unblocked while a thread is running Java.
1412 // (For some reason, they get blocked by default.)
1413 sigset_t* os::Solaris::unblocked_signals() {
1414 assert(signal_sets_initialized, "Not initialized");
1415 return &unblocked_sigs;
1416 }
1418 // These are the signals that are blocked while a (non-VM) thread is
1419 // running Java. Only the VM thread handles these signals.
1420 sigset_t* os::Solaris::vm_signals() {
1421 assert(signal_sets_initialized, "Not initialized");
1422 return &vm_sigs;
1423 }
1425 // These are signals that are blocked during cond_wait to allow debugger in
1426 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1427 assert(signal_sets_initialized, "Not initialized");
1428 return &allowdebug_blocked_sigs;
1429 }
1431 // First crack at OS-specific initialization, from inside the new thread.
1432 void os::initialize_thread() {
1433 int r = thr_main() ;
1434 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
1435 if (r) {
1436 JavaThread* jt = (JavaThread *)Thread::current();
1437 assert(jt != NULL,"Sanity check");
1438 size_t stack_size;
1439 address base = jt->stack_base();
1440 if (Arguments::created_by_java_launcher()) {
1441 // Use 2MB to allow for Solaris 7 64 bit mode.
1442 stack_size = JavaThread::stack_size_at_create() == 0
1443 ? 2048*K : JavaThread::stack_size_at_create();
1445 // There are rare cases when we may have already used more than
1446 // the basic stack size allotment before this method is invoked.
1447 // Attempt to allow for a normally sized java_stack.
1448 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1449 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1450 } else {
1451 // 6269555: If we were not created by a Java launcher, i.e. if we are
1452 // running embedded in a native application, treat the primordial thread
1453 // as much like a native attached thread as possible. This means using
1454 // the current stack size from thr_stksegment(), unless it is too large
1455 // to reliably setup guard pages. A reasonable max size is 8MB.
1456 size_t current_size = current_stack_size();
1457 // This should never happen, but just in case....
1458 if (current_size == 0) current_size = 2 * K * K;
1459 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1460 }
1461 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1462 stack_size = (size_t)(base - bottom);
1464 assert(stack_size > 0, "Stack size calculation problem");
1466 if (stack_size > jt->stack_size()) {
1467 NOT_PRODUCT(
1468 struct rlimit limits;
1469 getrlimit(RLIMIT_STACK, &limits);
1470 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1471 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1472 )
1473 tty->print_cr(
1474 "Stack size of %d Kb exceeds current limit of %d Kb.\n"
1475 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1476 "See limit(1) to increase the stack size limit.",
1477 stack_size / K, jt->stack_size() / K);
1478 vm_exit(1);
1479 }
1480 assert(jt->stack_size() >= stack_size,
1481 "Attempt to map more stack than was allocated");
1482 jt->set_stack_size(stack_size);
1483 }
1485 // 5/22/01: Right now alternate signal stacks do not handle
1486 // throwing stack overflow exceptions, see bug 4463178
1487 // Until a fix is found for this, T2 will NOT imply alternate signal
1488 // stacks.
1489 // If using T2 libthread threads, install an alternate signal stack.
1490 // Because alternate stacks associate with LWPs on Solaris,
1491 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads
1492 // we prefer to explicitly stack bang.
1493 // If not using T2 libthread, but using UseBoundThreads any threads
1494 // (primordial thread, jni_attachCurrentThread) we do not create,
1495 // probably are not bound, therefore they can not have an alternate
1496 // signal stack. Since our stack banging code is generated and
1497 // is shared across threads, all threads must be bound to allow
1498 // using alternate signal stacks. The alternative is to interpose
1499 // on _lwp_create to associate an alt sig stack with each LWP,
1500 // and this could be a problem when the JVM is embedded.
1501 // We would prefer to use alternate signal stacks with T2
1502 // Since there is currently no accurate way to detect T2
1503 // we do not. Assuming T2 when running T1 causes sig 11s or assertions
1504 // on installing alternate signal stacks
1507 // 05/09/03: removed alternate signal stack support for Solaris
1508 // The alternate signal stack mechanism is no longer needed to
1509 // handle stack overflow. This is now handled by allocating
1510 // guard pages (red zone) and stackbanging.
1511 // Initially the alternate signal stack mechanism was removed because
1512 // it did not work with T1 llibthread. Alternate
1513 // signal stacks MUST have all threads bound to lwps. Applications
1514 // can create their own threads and attach them without their being
1515 // bound under T1. This is frequently the case for the primordial thread.
1516 // If we were ever to reenable this mechanism we would need to
1517 // use the dynamic check for T2 libthread.
1519 os::Solaris::init_thread_fpu_state();
1520 }
1524 // Free Solaris resources related to the OSThread
1525 void os::free_thread(OSThread* osthread) {
1526 assert(osthread != NULL, "os::free_thread but osthread not set");
1529 // We are told to free resources of the argument thread,
1530 // but we can only really operate on the current thread.
1531 // The main thread must take the VMThread down synchronously
1532 // before the main thread exits and frees up CodeHeap
1533 guarantee((Thread::current()->osthread() == osthread
1534 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1535 if (Thread::current()->osthread() == osthread) {
1536 // Restore caller's signal mask
1537 sigset_t sigmask = osthread->caller_sigmask();
1538 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1539 }
1540 delete osthread;
1541 }
1543 void os::pd_start_thread(Thread* thread) {
1544 int status = thr_continue(thread->osthread()->thread_id());
1545 assert_status(status == 0, status, "thr_continue failed");
1546 }
1549 intx os::current_thread_id() {
1550 return (intx)thr_self();
1551 }
1553 static pid_t _initial_pid = 0;
1555 int os::current_process_id() {
1556 return (int)(_initial_pid ? _initial_pid : getpid());
1557 }
1559 int os::allocate_thread_local_storage() {
1560 // %%% in Win32 this allocates a memory segment pointed to by a
1561 // register. Dan Stein can implement a similar feature in
1562 // Solaris. Alternatively, the VM can do the same thing
1563 // explicitly: malloc some storage and keep the pointer in a
1564 // register (which is part of the thread's context) (or keep it
1565 // in TLS).
1566 // %%% In current versions of Solaris, thr_self and TSD can
1567 // be accessed via short sequences of displaced indirections.
1568 // The value of thr_self is available as %g7(36).
1569 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1570 // assuming that the current thread already has a value bound to k.
1571 // It may be worth experimenting with such access patterns,
1572 // and later having the parameters formally exported from a Solaris
1573 // interface. I think, however, that it will be faster to
1574 // maintain the invariant that %g2 always contains the
1575 // JavaThread in Java code, and have stubs simply
1576 // treat %g2 as a caller-save register, preserving it in a %lN.
1577 thread_key_t tk;
1578 if (thr_keycreate( &tk, NULL ) )
1579 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno));
1580 return int(tk);
1581 }
1583 void os::free_thread_local_storage(int index) {
1584 // %%% don't think we need anything here
1585 // if ( pthread_key_delete((pthread_key_t) tk) )
1586 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1587 }
1589 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific
1590 // small number - point is NO swap space available
1591 void os::thread_local_storage_at_put(int index, void* value) {
1592 // %%% this is used only in threadLocalStorage.cpp
1593 if (thr_setspecific((thread_key_t)index, value)) {
1594 if (errno == ENOMEM) {
1595 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space");
1596 } else {
1597 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno));
1598 }
1599 } else {
1600 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ;
1601 }
1602 }
1604 // This function could be called before TLS is initialized, for example, when
1605 // VM receives an async signal or when VM causes a fatal error during
1606 // initialization. Return NULL if thr_getspecific() fails.
1607 void* os::thread_local_storage_at(int index) {
1608 // %%% this is used only in threadLocalStorage.cpp
1609 void* r = NULL;
1610 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1611 }
1614 const int NANOSECS_PER_MILLISECS = 1000000;
1615 // gethrtime can move backwards if read from one cpu and then a different cpu
1616 // getTimeNanos is guaranteed to not move backward on Solaris
1617 // local spinloop created as faster for a CAS on an int than
1618 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not
1619 // supported on sparc v8 or pre supports_cx8 intel boxes.
1620 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong
1621 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes
1622 inline hrtime_t oldgetTimeNanos() {
1623 int gotlock = LOCK_INVALID;
1624 hrtime_t newtime = gethrtime();
1626 for (;;) {
1627 // grab lock for max_hrtime
1628 int curlock = max_hrtime_lock;
1629 if (curlock & LOCK_BUSY) continue;
1630 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue;
1631 if (newtime > max_hrtime) {
1632 max_hrtime = newtime;
1633 } else {
1634 newtime = max_hrtime;
1635 }
1636 // release lock
1637 max_hrtime_lock = LOCK_FREE;
1638 return newtime;
1639 }
1640 }
1641 // gethrtime can move backwards if read from one cpu and then a different cpu
1642 // getTimeNanos is guaranteed to not move backward on Solaris
1643 inline hrtime_t getTimeNanos() {
1644 if (VM_Version::supports_cx8()) {
1645 const hrtime_t now = gethrtime();
1646 const hrtime_t prev = max_hrtime;
1647 if (now <= prev) return prev; // same or retrograde time;
1648 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1649 assert(obsv >= prev, "invariant"); // Monotonicity
1650 // If the CAS succeeded then we're done and return "now".
1651 // If the CAS failed and the observed value "obs" is >= now then
1652 // we should return "obs". If the CAS failed and now > obs > prv then
1653 // some other thread raced this thread and installed a new value, in which case
1654 // we could either (a) retry the entire operation, (b) retry trying to install now
1655 // or (c) just return obs. We use (c). No loop is required although in some cases
1656 // we might discard a higher "now" value in deference to a slightly lower but freshly
1657 // installed obs value. That's entirely benign -- it admits no new orderings compared
1658 // to (a) or (b) -- and greatly reduces coherence traffic.
1659 // We might also condition (c) on the magnitude of the delta between obs and now.
1660 // Avoiding excessive CAS operations to hot RW locations is critical.
1661 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate
1662 return (prev == obsv) ? now : obsv ;
1663 } else {
1664 return oldgetTimeNanos();
1665 }
1666 }
1668 // Time since start-up in seconds to a fine granularity.
1669 // Used by VMSelfDestructTimer and the MemProfiler.
1670 double os::elapsedTime() {
1671 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1672 }
1674 jlong os::elapsed_counter() {
1675 return (jlong)(getTimeNanos() - first_hrtime);
1676 }
1678 jlong os::elapsed_frequency() {
1679 return hrtime_hz;
1680 }
1682 // Return the real, user, and system times in seconds from an
1683 // arbitrary fixed point in the past.
1684 bool os::getTimesSecs(double* process_real_time,
1685 double* process_user_time,
1686 double* process_system_time) {
1687 struct tms ticks;
1688 clock_t real_ticks = times(&ticks);
1690 if (real_ticks == (clock_t) (-1)) {
1691 return false;
1692 } else {
1693 double ticks_per_second = (double) clock_tics_per_sec;
1694 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1695 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1696 // For consistency return the real time from getTimeNanos()
1697 // converted to seconds.
1698 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1700 return true;
1701 }
1702 }
1704 bool os::supports_vtime() { return true; }
1706 bool os::enable_vtime() {
1707 int fd = open("/proc/self/ctl", O_WRONLY);
1708 if (fd == -1)
1709 return false;
1711 long cmd[] = { PCSET, PR_MSACCT };
1712 int res = write(fd, cmd, sizeof(long) * 2);
1713 close(fd);
1714 if (res != sizeof(long) * 2)
1715 return false;
1717 return true;
1718 }
1720 bool os::vtime_enabled() {
1721 int fd = open("/proc/self/status", O_RDONLY);
1722 if (fd == -1)
1723 return false;
1725 pstatus_t status;
1726 int res = read(fd, (void*) &status, sizeof(pstatus_t));
1727 close(fd);
1728 if (res != sizeof(pstatus_t))
1729 return false;
1731 return status.pr_flags & PR_MSACCT;
1732 }
1734 double os::elapsedVTime() {
1735 return (double)gethrvtime() / (double)hrtime_hz;
1736 }
1738 // Used internally for comparisons only
1739 // getTimeMillis guaranteed to not move backwards on Solaris
1740 jlong getTimeMillis() {
1741 jlong nanotime = getTimeNanos();
1742 return (jlong)(nanotime / NANOSECS_PER_MILLISECS);
1743 }
1745 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1746 jlong os::javaTimeMillis() {
1747 timeval t;
1748 if (gettimeofday( &t, NULL) == -1)
1749 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno));
1750 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1751 }
1753 jlong os::javaTimeNanos() {
1754 return (jlong)getTimeNanos();
1755 }
1757 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1758 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1759 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1760 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1761 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1762 }
1764 char * os::local_time_string(char *buf, size_t buflen) {
1765 struct tm t;
1766 time_t long_time;
1767 time(&long_time);
1768 localtime_r(&long_time, &t);
1769 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1770 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1771 t.tm_hour, t.tm_min, t.tm_sec);
1772 return buf;
1773 }
1775 // Note: os::shutdown() might be called very early during initialization, or
1776 // called from signal handler. Before adding something to os::shutdown(), make
1777 // sure it is async-safe and can handle partially initialized VM.
1778 void os::shutdown() {
1780 // allow PerfMemory to attempt cleanup of any persistent resources
1781 perfMemory_exit();
1783 // needs to remove object in file system
1784 AttachListener::abort();
1786 // flush buffered output, finish log files
1787 ostream_abort();
1789 // Check for abort hook
1790 abort_hook_t abort_hook = Arguments::abort_hook();
1791 if (abort_hook != NULL) {
1792 abort_hook();
1793 }
1794 }
1796 // Note: os::abort() might be called very early during initialization, or
1797 // called from signal handler. Before adding something to os::abort(), make
1798 // sure it is async-safe and can handle partially initialized VM.
1799 void os::abort(bool dump_core) {
1800 os::shutdown();
1801 if (dump_core) {
1802 #ifndef PRODUCT
1803 fdStream out(defaultStream::output_fd());
1804 out.print_raw("Current thread is ");
1805 char buf[16];
1806 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1807 out.print_raw_cr(buf);
1808 out.print_raw_cr("Dumping core ...");
1809 #endif
1810 ::abort(); // dump core (for debugging)
1811 }
1813 ::exit(1);
1814 }
1816 // Die immediately, no exit hook, no abort hook, no cleanup.
1817 void os::die() {
1818 _exit(-1);
1819 }
1821 // unused
1822 void os::set_error_file(const char *logfile) {}
1824 // DLL functions
1826 const char* os::dll_file_extension() { return ".so"; }
1828 const char* os::get_temp_directory() { return "/tmp/"; }
1830 void os::dll_build_name(
1831 char* buffer, size_t buflen, const char* pname, const char* fname) {
1832 // copied from libhpi
1833 const size_t pnamelen = pname ? strlen(pname) : 0;
1835 /* Quietly truncate on buffer overflow. Should be an error. */
1836 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1837 *buffer = '\0';
1838 return;
1839 }
1841 if (pnamelen == 0) {
1842 sprintf(buffer, "lib%s.so", fname);
1843 } else {
1844 sprintf(buffer, "%s/lib%s.so", pname, fname);
1845 }
1846 }
1848 const char* os::get_current_directory(char *buf, int buflen) {
1849 return getcwd(buf, buflen);
1850 }
1852 // check if addr is inside libjvm[_g].so
1853 bool os::address_is_in_vm(address addr) {
1854 static address libjvm_base_addr;
1855 Dl_info dlinfo;
1857 if (libjvm_base_addr == NULL) {
1858 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
1859 libjvm_base_addr = (address)dlinfo.dli_fbase;
1860 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1861 }
1863 if (dladdr((void *)addr, &dlinfo)) {
1864 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1865 }
1867 return false;
1868 }
1870 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int);
1871 static dladdr1_func_type dladdr1_func = NULL;
1873 bool os::dll_address_to_function_name(address addr, char *buf,
1874 int buflen, int * offset) {
1875 Dl_info dlinfo;
1877 // dladdr1_func was initialized in os::init()
1878 if (dladdr1_func){
1879 // yes, we have dladdr1
1881 // Support for dladdr1 is checked at runtime; it may be
1882 // available even if the vm is built on a machine that does
1883 // not have dladdr1 support. Make sure there is a value for
1884 // RTLD_DL_SYMENT.
1885 #ifndef RTLD_DL_SYMENT
1886 #define RTLD_DL_SYMENT 1
1887 #endif
1888 Sym * info;
1889 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1890 RTLD_DL_SYMENT)) {
1891 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1892 if (offset) *offset = addr - (address)dlinfo.dli_saddr;
1894 // check if the returned symbol really covers addr
1895 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr);
1896 } else {
1897 if (buf) buf[0] = '\0';
1898 if (offset) *offset = -1;
1899 return false;
1900 }
1901 } else {
1902 // no, only dladdr is available
1903 if(dladdr((void *)addr, &dlinfo)) {
1904 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname);
1905 if (offset) *offset = addr - (address)dlinfo.dli_saddr;
1906 return true;
1907 } else {
1908 if (buf) buf[0] = '\0';
1909 if (offset) *offset = -1;
1910 return false;
1911 }
1912 }
1913 }
1915 bool os::dll_address_to_library_name(address addr, char* buf,
1916 int buflen, int* offset) {
1917 Dl_info dlinfo;
1919 if (dladdr((void*)addr, &dlinfo)){
1920 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1921 if (offset) *offset = addr - (address)dlinfo.dli_fbase;
1922 return true;
1923 } else {
1924 if (buf) buf[0] = '\0';
1925 if (offset) *offset = -1;
1926 return false;
1927 }
1928 }
1930 // Prints the names and full paths of all opened dynamic libraries
1931 // for current process
1932 void os::print_dll_info(outputStream * st) {
1933 Dl_info dli;
1934 void *handle;
1935 Link_map *map;
1936 Link_map *p;
1938 st->print_cr("Dynamic libraries:"); st->flush();
1940 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) {
1941 st->print_cr("Error: Cannot print dynamic libraries.");
1942 return;
1943 }
1944 handle = dlopen(dli.dli_fname, RTLD_LAZY);
1945 if (handle == NULL) {
1946 st->print_cr("Error: Cannot print dynamic libraries.");
1947 return;
1948 }
1949 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1950 if (map == NULL) {
1951 st->print_cr("Error: Cannot print dynamic libraries.");
1952 return;
1953 }
1955 while (map->l_prev != NULL)
1956 map = map->l_prev;
1958 while (map != NULL) {
1959 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
1960 map = map->l_next;
1961 }
1963 dlclose(handle);
1964 }
1966 // Loads .dll/.so and
1967 // in case of error it checks if .dll/.so was built for the
1968 // same architecture as Hotspot is running on
1970 void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
1971 {
1972 void * result= ::dlopen(filename, RTLD_LAZY);
1973 if (result != NULL) {
1974 // Successful loading
1975 return result;
1976 }
1978 Elf32_Ehdr elf_head;
1980 // Read system error message into ebuf
1981 // It may or may not be overwritten below
1982 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
1983 ebuf[ebuflen-1]='\0';
1984 int diag_msg_max_length=ebuflen-strlen(ebuf);
1985 char* diag_msg_buf=ebuf+strlen(ebuf);
1987 if (diag_msg_max_length==0) {
1988 // No more space in ebuf for additional diagnostics message
1989 return NULL;
1990 }
1993 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1995 if (file_descriptor < 0) {
1996 // Can't open library, report dlerror() message
1997 return NULL;
1998 }
2000 bool failed_to_read_elf_head=
2001 (sizeof(elf_head)!=
2002 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
2004 ::close(file_descriptor);
2005 if (failed_to_read_elf_head) {
2006 // file i/o error - report dlerror() msg
2007 return NULL;
2008 }
2010 typedef struct {
2011 Elf32_Half code; // Actual value as defined in elf.h
2012 Elf32_Half compat_class; // Compatibility of archs at VM's sense
2013 char elf_class; // 32 or 64 bit
2014 char endianess; // MSB or LSB
2015 char* name; // String representation
2016 } arch_t;
2018 static const arch_t arch_array[]={
2019 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2020 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2021 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
2022 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
2023 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2024 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2025 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
2026 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
2027 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}
2028 };
2030 #if (defined IA32)
2031 static Elf32_Half running_arch_code=EM_386;
2032 #elif (defined AMD64)
2033 static Elf32_Half running_arch_code=EM_X86_64;
2034 #elif (defined IA64)
2035 static Elf32_Half running_arch_code=EM_IA_64;
2036 #elif (defined __sparc) && (defined _LP64)
2037 static Elf32_Half running_arch_code=EM_SPARCV9;
2038 #elif (defined __sparc) && (!defined _LP64)
2039 static Elf32_Half running_arch_code=EM_SPARC;
2040 #elif (defined __powerpc64__)
2041 static Elf32_Half running_arch_code=EM_PPC64;
2042 #elif (defined __powerpc__)
2043 static Elf32_Half running_arch_code=EM_PPC;
2044 #else
2045 #error Method os::dll_load requires that one of following is defined:\
2046 IA32, AMD64, IA64, __sparc, __powerpc__
2047 #endif
2049 // Identify compatability class for VM's architecture and library's architecture
2050 // Obtain string descriptions for architectures
2052 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
2053 int running_arch_index=-1;
2055 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
2056 if (running_arch_code == arch_array[i].code) {
2057 running_arch_index = i;
2058 }
2059 if (lib_arch.code == arch_array[i].code) {
2060 lib_arch.compat_class = arch_array[i].compat_class;
2061 lib_arch.name = arch_array[i].name;
2062 }
2063 }
2065 assert(running_arch_index != -1,
2066 "Didn't find running architecture code (running_arch_code) in arch_array");
2067 if (running_arch_index == -1) {
2068 // Even though running architecture detection failed
2069 // we may still continue with reporting dlerror() message
2070 return NULL;
2071 }
2073 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
2074 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
2075 return NULL;
2076 }
2078 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
2079 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
2080 return NULL;
2081 }
2083 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
2084 if ( lib_arch.name!=NULL ) {
2085 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2086 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
2087 lib_arch.name, arch_array[running_arch_index].name);
2088 } else {
2089 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2090 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
2091 lib_arch.code,
2092 arch_array[running_arch_index].name);
2093 }
2094 }
2096 return NULL;
2097 }
2099 void* os::dll_lookup(void* handle, const char* name) {
2100 return dlsym(handle, name);
2101 }
2104 bool _print_ascii_file(const char* filename, outputStream* st) {
2105 int fd = open(filename, O_RDONLY);
2106 if (fd == -1) {
2107 return false;
2108 }
2110 char buf[32];
2111 int bytes;
2112 while ((bytes = read(fd, buf, sizeof(buf))) > 0) {
2113 st->print_raw(buf, bytes);
2114 }
2116 close(fd);
2118 return true;
2119 }
2121 void os::print_os_info(outputStream* st) {
2122 st->print("OS:");
2124 if (!_print_ascii_file("/etc/release", st)) {
2125 st->print("Solaris");
2126 }
2127 st->cr();
2129 // kernel
2130 st->print("uname:");
2131 struct utsname name;
2132 uname(&name);
2133 st->print(name.sysname); st->print(" ");
2134 st->print(name.release); st->print(" ");
2135 st->print(name.version); st->print(" ");
2136 st->print(name.machine);
2138 // libthread
2139 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)");
2140 else st->print(" (T1 libthread)");
2141 st->cr();
2143 // rlimit
2144 st->print("rlimit:");
2145 struct rlimit rlim;
2147 st->print(" STACK ");
2148 getrlimit(RLIMIT_STACK, &rlim);
2149 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
2150 else st->print("%uk", rlim.rlim_cur >> 10);
2152 st->print(", CORE ");
2153 getrlimit(RLIMIT_CORE, &rlim);
2154 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
2155 else st->print("%uk", rlim.rlim_cur >> 10);
2157 st->print(", NOFILE ");
2158 getrlimit(RLIMIT_NOFILE, &rlim);
2159 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
2160 else st->print("%d", rlim.rlim_cur);
2162 st->print(", AS ");
2163 getrlimit(RLIMIT_AS, &rlim);
2164 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
2165 else st->print("%uk", rlim.rlim_cur >> 10);
2166 st->cr();
2168 // load average
2169 st->print("load average:");
2170 double loadavg[3];
2171 os::loadavg(loadavg, 3);
2172 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]);
2173 st->cr();
2174 }
2177 static bool check_addr0(outputStream* st) {
2178 jboolean status = false;
2179 int fd = open("/proc/self/map",O_RDONLY);
2180 if (fd >= 0) {
2181 prmap_t p;
2182 while(read(fd, &p, sizeof(p)) > 0) {
2183 if (p.pr_vaddr == 0x0) {
2184 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
2185 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
2186 st->print("Access:");
2187 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
2188 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
2189 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
2190 st->cr();
2191 status = true;
2192 }
2193 close(fd);
2194 }
2195 }
2196 return status;
2197 }
2199 void os::print_memory_info(outputStream* st) {
2200 st->print("Memory:");
2201 st->print(" %dk page", os::vm_page_size()>>10);
2202 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2203 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2204 st->cr();
2205 (void) check_addr0(st);
2206 }
2208 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific
2209 // but they're the same for all the solaris architectures that we support.
2210 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR",
2211 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG",
2212 "ILL_COPROC", "ILL_BADSTK" };
2214 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV",
2215 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES",
2216 "FPE_FLTINV", "FPE_FLTSUB" };
2218 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" };
2220 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" };
2222 void os::print_siginfo(outputStream* st, void* siginfo) {
2223 st->print("siginfo:");
2225 const int buflen = 100;
2226 char buf[buflen];
2227 siginfo_t *si = (siginfo_t*)siginfo;
2228 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen));
2229 char *err = strerror(si->si_errno);
2230 if (si->si_errno != 0 && err != NULL) {
2231 st->print("si_errno=%s", err);
2232 } else {
2233 st->print("si_errno=%d", si->si_errno);
2234 }
2235 const int c = si->si_code;
2236 assert(c > 0, "unexpected si_code");
2237 switch (si->si_signo) {
2238 case SIGILL:
2239 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]);
2240 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2241 break;
2242 case SIGFPE:
2243 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]);
2244 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2245 break;
2246 case SIGSEGV:
2247 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]);
2248 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2249 break;
2250 case SIGBUS:
2251 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]);
2252 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2253 break;
2254 default:
2255 st->print(", si_code=%d", si->si_code);
2256 // no si_addr
2257 }
2259 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2260 UseSharedSpaces) {
2261 FileMapInfo* mapinfo = FileMapInfo::current_info();
2262 if (mapinfo->is_in_shared_space(si->si_addr)) {
2263 st->print("\n\nError accessing class data sharing archive." \
2264 " Mapped file inaccessible during execution, " \
2265 " possible disk/network problem.");
2266 }
2267 }
2268 st->cr();
2269 }
2271 // Moved from whole group, because we need them here for diagnostic
2272 // prints.
2273 #define OLDMAXSIGNUM 32
2274 static int Maxsignum = 0;
2275 static int *ourSigFlags = NULL;
2277 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2279 int os::Solaris::get_our_sigflags(int sig) {
2280 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2281 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2282 return ourSigFlags[sig];
2283 }
2285 void os::Solaris::set_our_sigflags(int sig, int flags) {
2286 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2287 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2288 ourSigFlags[sig] = flags;
2289 }
2292 static const char* get_signal_handler_name(address handler,
2293 char* buf, int buflen) {
2294 int offset;
2295 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2296 if (found) {
2297 // skip directory names
2298 const char *p1, *p2;
2299 p1 = buf;
2300 size_t len = strlen(os::file_separator());
2301 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2302 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2303 } else {
2304 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2305 }
2306 return buf;
2307 }
2309 static void print_signal_handler(outputStream* st, int sig,
2310 char* buf, size_t buflen) {
2311 struct sigaction sa;
2313 sigaction(sig, NULL, &sa);
2315 st->print("%s: ", os::exception_name(sig, buf, buflen));
2317 address handler = (sa.sa_flags & SA_SIGINFO)
2318 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2319 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2321 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2322 st->print("SIG_DFL");
2323 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2324 st->print("SIG_IGN");
2325 } else {
2326 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2327 }
2329 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask);
2331 address rh = VMError::get_resetted_sighandler(sig);
2332 // May be, handler was resetted by VMError?
2333 if(rh != NULL) {
2334 handler = rh;
2335 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2336 }
2338 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags);
2340 // Check: is it our handler?
2341 if(handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2342 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2343 // It is our signal handler
2344 // check for flags
2345 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2346 st->print(
2347 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2348 os::Solaris::get_our_sigflags(sig));
2349 }
2350 }
2351 st->cr();
2352 }
2354 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2355 st->print_cr("Signal Handlers:");
2356 print_signal_handler(st, SIGSEGV, buf, buflen);
2357 print_signal_handler(st, SIGBUS , buf, buflen);
2358 print_signal_handler(st, SIGFPE , buf, buflen);
2359 print_signal_handler(st, SIGPIPE, buf, buflen);
2360 print_signal_handler(st, SIGXFSZ, buf, buflen);
2361 print_signal_handler(st, SIGILL , buf, buflen);
2362 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2363 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2364 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2365 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2366 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2367 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2368 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2369 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2370 }
2372 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2374 // Find the full path to the current module, libjvm.so or libjvm_g.so
2375 void os::jvm_path(char *buf, jint buflen) {
2376 // Error checking.
2377 if (buflen < MAXPATHLEN) {
2378 assert(false, "must use a large-enough buffer");
2379 buf[0] = '\0';
2380 return;
2381 }
2382 // Lazy resolve the path to current module.
2383 if (saved_jvm_path[0] != 0) {
2384 strcpy(buf, saved_jvm_path);
2385 return;
2386 }
2388 Dl_info dlinfo;
2389 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2390 assert(ret != 0, "cannot locate libjvm");
2391 realpath((char *)dlinfo.dli_fname, buf);
2393 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) {
2394 // Support for the gamma launcher. Typical value for buf is
2395 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at
2396 // the right place in the string, then assume we are installed in a JDK and
2397 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix
2398 // up the path so it looks like libjvm.so is installed there (append a
2399 // fake suffix hotspot/libjvm.so).
2400 const char *p = buf + strlen(buf) - 1;
2401 for (int count = 0; p > buf && count < 5; ++count) {
2402 for (--p; p > buf && *p != '/'; --p)
2403 /* empty */ ;
2404 }
2406 if (strncmp(p, "/jre/lib/", 9) != 0) {
2407 // Look for JAVA_HOME in the environment.
2408 char* java_home_var = ::getenv("JAVA_HOME");
2409 if (java_home_var != NULL && java_home_var[0] != 0) {
2410 char cpu_arch[12];
2411 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2412 #ifdef _LP64
2413 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2414 if (strcmp(cpu_arch, "sparc") == 0) {
2415 strcat(cpu_arch, "v9");
2416 } else if (strcmp(cpu_arch, "i386") == 0) {
2417 strcpy(cpu_arch, "amd64");
2418 }
2419 #endif
2420 // Check the current module name "libjvm.so" or "libjvm_g.so".
2421 p = strrchr(buf, '/');
2422 assert(strstr(p, "/libjvm") == p, "invalid library name");
2423 p = strstr(p, "_g") ? "_g" : "";
2425 realpath(java_home_var, buf);
2426 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch);
2427 if (0 == access(buf, F_OK)) {
2428 // Use current module name "libjvm[_g].so" instead of
2429 // "libjvm"debug_only("_g")".so" since for fastdebug version
2430 // we should have "libjvm.so" but debug_only("_g") adds "_g"!
2431 // It is used when we are choosing the HPI library's name
2432 // "libhpi[_g].so" in hpi::initialize_get_interface().
2433 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p);
2434 } else {
2435 // Go back to path of .so
2436 realpath((char *)dlinfo.dli_fname, buf);
2437 }
2438 }
2439 }
2440 }
2442 strcpy(saved_jvm_path, buf);
2443 }
2446 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2447 // no prefix required, not even "_"
2448 }
2451 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2452 // no suffix required
2453 }
2456 // sun.misc.Signal
2458 extern "C" {
2459 static void UserHandler(int sig, void *siginfo, void *context) {
2460 // Ctrl-C is pressed during error reporting, likely because the error
2461 // handler fails to abort. Let VM die immediately.
2462 if (sig == SIGINT && is_error_reported()) {
2463 os::die();
2464 }
2466 os::signal_notify(sig);
2467 // We do not need to reinstate the signal handler each time...
2468 }
2469 }
2471 void* os::user_handler() {
2472 return CAST_FROM_FN_PTR(void*, UserHandler);
2473 }
2475 extern "C" {
2476 typedef void (*sa_handler_t)(int);
2477 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2478 }
2480 void* os::signal(int signal_number, void* handler) {
2481 struct sigaction sigAct, oldSigAct;
2482 sigfillset(&(sigAct.sa_mask));
2483 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2484 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2486 if (sigaction(signal_number, &sigAct, &oldSigAct))
2487 // -1 means registration failed
2488 return (void *)-1;
2490 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2491 }
2493 void os::signal_raise(int signal_number) {
2494 raise(signal_number);
2495 }
2497 /*
2498 * The following code is moved from os.cpp for making this
2499 * code platform specific, which it is by its very nature.
2500 */
2502 // a counter for each possible signal value
2503 static int Sigexit = 0;
2504 static int Maxlibjsigsigs;
2505 static jint *pending_signals = NULL;
2506 static int *preinstalled_sigs = NULL;
2507 static struct sigaction *chainedsigactions = NULL;
2508 static sema_t sig_sem;
2509 typedef int (*version_getting_t)();
2510 version_getting_t os::Solaris::get_libjsig_version = NULL;
2511 static int libjsigversion = NULL;
2513 int os::sigexitnum_pd() {
2514 assert(Sigexit > 0, "signal memory not yet initialized");
2515 return Sigexit;
2516 }
2518 void os::Solaris::init_signal_mem() {
2519 // Initialize signal structures
2520 Maxsignum = SIGRTMAX;
2521 Sigexit = Maxsignum+1;
2522 assert(Maxsignum >0, "Unable to obtain max signal number");
2524 Maxlibjsigsigs = Maxsignum;
2526 // pending_signals has one int per signal
2527 // The additional signal is for SIGEXIT - exit signal to signal_thread
2528 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1));
2529 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2531 if (UseSignalChaining) {
2532 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2533 * (Maxsignum + 1));
2534 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2535 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1));
2536 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2537 }
2538 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ));
2539 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2540 }
2542 void os::signal_init_pd() {
2543 int ret;
2545 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2546 assert(ret == 0, "sema_init() failed");
2547 }
2549 void os::signal_notify(int signal_number) {
2550 int ret;
2552 Atomic::inc(&pending_signals[signal_number]);
2553 ret = ::sema_post(&sig_sem);
2554 assert(ret == 0, "sema_post() failed");
2555 }
2557 static int check_pending_signals(bool wait_for_signal) {
2558 int ret;
2559 while (true) {
2560 for (int i = 0; i < Sigexit + 1; i++) {
2561 jint n = pending_signals[i];
2562 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2563 return i;
2564 }
2565 }
2566 if (!wait_for_signal) {
2567 return -1;
2568 }
2569 JavaThread *thread = JavaThread::current();
2570 ThreadBlockInVM tbivm(thread);
2572 bool threadIsSuspended;
2573 do {
2574 thread->set_suspend_equivalent();
2575 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2576 while((ret = ::sema_wait(&sig_sem)) == EINTR)
2577 ;
2578 assert(ret == 0, "sema_wait() failed");
2580 // were we externally suspended while we were waiting?
2581 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2582 if (threadIsSuspended) {
2583 //
2584 // The semaphore has been incremented, but while we were waiting
2585 // another thread suspended us. We don't want to continue running
2586 // while suspended because that would surprise the thread that
2587 // suspended us.
2588 //
2589 ret = ::sema_post(&sig_sem);
2590 assert(ret == 0, "sema_post() failed");
2592 thread->java_suspend_self();
2593 }
2594 } while (threadIsSuspended);
2595 }
2596 }
2598 int os::signal_lookup() {
2599 return check_pending_signals(false);
2600 }
2602 int os::signal_wait() {
2603 return check_pending_signals(true);
2604 }
2606 ////////////////////////////////////////////////////////////////////////////////
2607 // Virtual Memory
2609 static int page_size = -1;
2611 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2612 // clear this var if support is not available.
2613 static bool has_map_align = true;
2615 int os::vm_page_size() {
2616 assert(page_size != -1, "must call os::init");
2617 return page_size;
2618 }
2620 // Solaris allocates memory by pages.
2621 int os::vm_allocation_granularity() {
2622 assert(page_size != -1, "must call os::init");
2623 return page_size;
2624 }
2626 bool os::commit_memory(char* addr, size_t bytes) {
2627 size_t size = bytes;
2628 return
2629 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED,
2630 PROT_READ | PROT_WRITE | PROT_EXEC);
2631 }
2633 bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) {
2634 if (commit_memory(addr, bytes)) {
2635 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) {
2636 // If the large page size has been set and the VM
2637 // is using large pages, use the large page size
2638 // if it is smaller than the alignment hint. This is
2639 // a case where the VM wants to use a larger alignment size
2640 // for its own reasons but still want to use large pages
2641 // (which is what matters to setting the mpss range.
2642 size_t page_size = 0;
2643 if (large_page_size() < alignment_hint) {
2644 assert(UseLargePages, "Expected to be here for large page use only");
2645 page_size = large_page_size();
2646 } else {
2647 // If the alignment hint is less than the large page
2648 // size, the VM wants a particular alignment (thus the hint)
2649 // for internal reasons. Try to set the mpss range using
2650 // the alignment_hint.
2651 page_size = alignment_hint;
2652 }
2653 // Since this is a hint, ignore any failures.
2654 (void)Solaris::set_mpss_range(addr, bytes, page_size);
2655 }
2656 return true;
2657 }
2658 return false;
2659 }
2661 // Uncommit the pages in a specified region.
2662 void os::free_memory(char* addr, size_t bytes) {
2663 if (madvise(addr, bytes, MADV_FREE) < 0) {
2664 debug_only(warning("MADV_FREE failed."));
2665 return;
2666 }
2667 }
2669 // Change the page size in a given range.
2670 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2671 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2672 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2673 Solaris::set_mpss_range(addr, bytes, alignment_hint);
2674 }
2676 // Tell the OS to make the range local to the first-touching LWP
2677 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2678 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2679 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2680 debug_only(warning("MADV_ACCESS_LWP failed."));
2681 }
2682 }
2684 // Tell the OS that this range would be accessed from different LWPs.
2685 void os::numa_make_global(char *addr, size_t bytes) {
2686 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2687 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2688 debug_only(warning("MADV_ACCESS_MANY failed."));
2689 }
2690 }
2692 // Get the number of the locality groups.
2693 size_t os::numa_get_groups_num() {
2694 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2695 return n != -1 ? n : 1;
2696 }
2698 // Get a list of leaf locality groups. A leaf lgroup is group that
2699 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2700 // board. An LWP is assigned to one of these groups upon creation.
2701 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2702 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2703 ids[0] = 0;
2704 return 1;
2705 }
2706 int result_size = 0, top = 1, bottom = 0, cur = 0;
2707 for (int k = 0; k < size; k++) {
2708 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2709 (Solaris::lgrp_id_t*)&ids[top], size - top);
2710 if (r == -1) {
2711 ids[0] = 0;
2712 return 1;
2713 }
2714 if (!r) {
2715 // That's a leaf node.
2716 assert (bottom <= cur, "Sanity check");
2717 // Check if the node has memory
2718 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2719 NULL, 0, LGRP_RSRC_MEM) > 0) {
2720 ids[bottom++] = ids[cur];
2721 }
2722 }
2723 top += r;
2724 cur++;
2725 }
2726 if (bottom == 0) {
2727 // Handle a situation, when the OS reports no memory available.
2728 // Assume UMA architecture.
2729 ids[0] = 0;
2730 return 1;
2731 }
2732 return bottom;
2733 }
2735 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2736 bool os::numa_topology_changed() {
2737 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2738 if (is_stale != -1 && is_stale) {
2739 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2740 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2741 assert(c != 0, "Failure to initialize LGRP API");
2742 Solaris::set_lgrp_cookie(c);
2743 return true;
2744 }
2745 return false;
2746 }
2748 // Get the group id of the current LWP.
2749 int os::numa_get_group_id() {
2750 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2751 if (lgrp_id == -1) {
2752 return 0;
2753 }
2754 const int size = os::numa_get_groups_num();
2755 int *ids = (int*)alloca(size * sizeof(int));
2757 // Get the ids of all lgroups with memory; r is the count.
2758 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2759 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2760 if (r <= 0) {
2761 return 0;
2762 }
2763 return ids[os::random() % r];
2764 }
2766 // Request information about the page.
2767 bool os::get_page_info(char *start, page_info* info) {
2768 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2769 uint64_t addr = (uintptr_t)start;
2770 uint64_t outdata[2];
2771 uint_t validity = 0;
2773 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2774 return false;
2775 }
2777 info->size = 0;
2778 info->lgrp_id = -1;
2780 if ((validity & 1) != 0) {
2781 if ((validity & 2) != 0) {
2782 info->lgrp_id = outdata[0];
2783 }
2784 if ((validity & 4) != 0) {
2785 info->size = outdata[1];
2786 }
2787 return true;
2788 }
2789 return false;
2790 }
2792 // Scan the pages from start to end until a page different than
2793 // the one described in the info parameter is encountered.
2794 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
2795 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2796 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2797 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT];
2798 uint_t validity[MAX_MEMINFO_CNT];
2800 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2801 uint64_t p = (uint64_t)start;
2802 while (p < (uint64_t)end) {
2803 addrs[0] = p;
2804 size_t addrs_count = 1;
2805 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) {
2806 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2807 addrs_count++;
2808 }
2810 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2811 return NULL;
2812 }
2814 size_t i = 0;
2815 for (; i < addrs_count; i++) {
2816 if ((validity[i] & 1) != 0) {
2817 if ((validity[i] & 4) != 0) {
2818 if (outdata[types * i + 1] != page_expected->size) {
2819 break;
2820 }
2821 } else
2822 if (page_expected->size != 0) {
2823 break;
2824 }
2826 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2827 if (outdata[types * i] != page_expected->lgrp_id) {
2828 break;
2829 }
2830 }
2831 } else {
2832 return NULL;
2833 }
2834 }
2836 if (i != addrs_count) {
2837 if ((validity[i] & 2) != 0) {
2838 page_found->lgrp_id = outdata[types * i];
2839 } else {
2840 page_found->lgrp_id = -1;
2841 }
2842 if ((validity[i] & 4) != 0) {
2843 page_found->size = outdata[types * i + 1];
2844 } else {
2845 page_found->size = 0;
2846 }
2847 return (char*)addrs[i];
2848 }
2850 p = addrs[addrs_count - 1] + page_size;
2851 }
2852 return end;
2853 }
2855 bool os::uncommit_memory(char* addr, size_t bytes) {
2856 size_t size = bytes;
2857 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2858 // uncommitted page. Otherwise, the read/write might succeed if we
2859 // have enough swap space to back the physical page.
2860 return
2861 NULL != Solaris::mmap_chunk(addr, size,
2862 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2863 PROT_NONE);
2864 }
2866 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2867 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2869 if (b == MAP_FAILED) {
2870 return NULL;
2871 }
2872 return b;
2873 }
2875 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) {
2876 char* addr = requested_addr;
2877 int flags = MAP_PRIVATE | MAP_NORESERVE;
2879 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap");
2881 if (fixed) {
2882 flags |= MAP_FIXED;
2883 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
2884 flags |= MAP_ALIGN;
2885 addr = (char*) alignment_hint;
2886 }
2888 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2889 // uncommitted page. Otherwise, the read/write might succeed if we
2890 // have enough swap space to back the physical page.
2891 return mmap_chunk(addr, bytes, flags, PROT_NONE);
2892 }
2894 char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
2895 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL));
2897 guarantee(requested_addr == NULL || requested_addr == addr,
2898 "OS failed to return requested mmap address.");
2899 return addr;
2900 }
2902 // Reserve memory at an arbitrary address, only if that area is
2903 // available (and not reserved for something else).
2905 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2906 const int max_tries = 10;
2907 char* base[max_tries];
2908 size_t size[max_tries];
2910 // Solaris adds a gap between mmap'ed regions. The size of the gap
2911 // is dependent on the requested size and the MMU. Our initial gap
2912 // value here is just a guess and will be corrected later.
2913 bool had_top_overlap = false;
2914 bool have_adjusted_gap = false;
2915 size_t gap = 0x400000;
2917 // Assert only that the size is a multiple of the page size, since
2918 // that's all that mmap requires, and since that's all we really know
2919 // about at this low abstraction level. If we need higher alignment,
2920 // we can either pass an alignment to this method or verify alignment
2921 // in one of the methods further up the call chain. See bug 5044738.
2922 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
2924 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
2925 // Give it a try, if the kernel honors the hint we can return immediately.
2926 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
2927 volatile int err = errno;
2928 if (addr == requested_addr) {
2929 return addr;
2930 } else if (addr != NULL) {
2931 unmap_memory(addr, bytes);
2932 }
2934 if (PrintMiscellaneous && Verbose) {
2935 char buf[256];
2936 buf[0] = '\0';
2937 if (addr == NULL) {
2938 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
2939 }
2940 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at "
2941 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
2942 "%s", bytes, requested_addr, addr, buf);
2943 }
2945 // Address hint method didn't work. Fall back to the old method.
2946 // In theory, once SNV becomes our oldest supported platform, this
2947 // code will no longer be needed.
2948 //
2949 // Repeatedly allocate blocks until the block is allocated at the
2950 // right spot. Give up after max_tries.
2951 int i;
2952 for (i = 0; i < max_tries; ++i) {
2953 base[i] = reserve_memory(bytes);
2955 if (base[i] != NULL) {
2956 // Is this the block we wanted?
2957 if (base[i] == requested_addr) {
2958 size[i] = bytes;
2959 break;
2960 }
2962 // check that the gap value is right
2963 if (had_top_overlap && !have_adjusted_gap) {
2964 size_t actual_gap = base[i-1] - base[i] - bytes;
2965 if (gap != actual_gap) {
2966 // adjust the gap value and retry the last 2 allocations
2967 assert(i > 0, "gap adjustment code problem");
2968 have_adjusted_gap = true; // adjust the gap only once, just in case
2969 gap = actual_gap;
2970 if (PrintMiscellaneous && Verbose) {
2971 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
2972 }
2973 unmap_memory(base[i], bytes);
2974 unmap_memory(base[i-1], size[i-1]);
2975 i-=2;
2976 continue;
2977 }
2978 }
2980 // Does this overlap the block we wanted? Give back the overlapped
2981 // parts and try again.
2982 //
2983 // There is still a bug in this code: if top_overlap == bytes,
2984 // the overlap is offset from requested region by the value of gap.
2985 // In this case giving back the overlapped part will not work,
2986 // because we'll give back the entire block at base[i] and
2987 // therefore the subsequent allocation will not generate a new gap.
2988 // This could be fixed with a new algorithm that used larger
2989 // or variable size chunks to find the requested region -
2990 // but such a change would introduce additional complications.
2991 // It's rare enough that the planets align for this bug,
2992 // so we'll just wait for a fix for 6204603/5003415 which
2993 // will provide a mmap flag to allow us to avoid this business.
2995 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
2996 if (top_overlap >= 0 && top_overlap < bytes) {
2997 had_top_overlap = true;
2998 unmap_memory(base[i], top_overlap);
2999 base[i] += top_overlap;
3000 size[i] = bytes - top_overlap;
3001 } else {
3002 size_t bottom_overlap = base[i] + bytes - requested_addr;
3003 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
3004 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
3005 warning("attempt_reserve_memory_at: possible alignment bug");
3006 }
3007 unmap_memory(requested_addr, bottom_overlap);
3008 size[i] = bytes - bottom_overlap;
3009 } else {
3010 size[i] = bytes;
3011 }
3012 }
3013 }
3014 }
3016 // Give back the unused reserved pieces.
3018 for (int j = 0; j < i; ++j) {
3019 if (base[j] != NULL) {
3020 unmap_memory(base[j], size[j]);
3021 }
3022 }
3024 return (i < max_tries) ? requested_addr : NULL;
3025 }
3027 bool os::release_memory(char* addr, size_t bytes) {
3028 size_t size = bytes;
3029 return munmap(addr, size) == 0;
3030 }
3032 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
3033 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
3034 "addr must be page aligned");
3035 int retVal = mprotect(addr, bytes, prot);
3036 return retVal == 0;
3037 }
3039 // Protect memory (Used to pass readonly pages through
3040 // JNI GetArray<type>Elements with empty arrays.)
3041 // Also, used for serialization page and for compressed oops null pointer
3042 // checking.
3043 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3044 bool is_committed) {
3045 unsigned int p = 0;
3046 switch (prot) {
3047 case MEM_PROT_NONE: p = PROT_NONE; break;
3048 case MEM_PROT_READ: p = PROT_READ; break;
3049 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3050 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3051 default:
3052 ShouldNotReachHere();
3053 }
3054 // is_committed is unused.
3055 return solaris_mprotect(addr, bytes, p);
3056 }
3058 // guard_memory and unguard_memory only happens within stack guard pages.
3059 // Since ISM pertains only to the heap, guard and unguard memory should not
3060 /// happen with an ISM region.
3061 bool os::guard_memory(char* addr, size_t bytes) {
3062 return solaris_mprotect(addr, bytes, PROT_NONE);
3063 }
3065 bool os::unguard_memory(char* addr, size_t bytes) {
3066 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3067 }
3069 // Large page support
3071 // UseLargePages is the master flag to enable/disable large page memory.
3072 // UseMPSS and UseISM are supported for compatibility reasons. Their combined
3073 // effects can be described in the following table:
3074 //
3075 // UseLargePages UseMPSS UseISM
3076 // false * * => UseLargePages is the master switch, turning
3077 // it off will turn off both UseMPSS and
3078 // UseISM. VM will not use large page memory
3079 // regardless the settings of UseMPSS/UseISM.
3080 // true false false => Unless future Solaris provides other
3081 // mechanism to use large page memory, this
3082 // combination is equivalent to -UseLargePages,
3083 // VM will not use large page memory
3084 // true true false => JVM will use MPSS for large page memory.
3085 // This is the default behavior.
3086 // true false true => JVM will use ISM for large page memory.
3087 // true true true => JVM will use ISM if it is available.
3088 // Otherwise, JVM will fall back to MPSS.
3089 // Becaues ISM is now available on all
3090 // supported Solaris versions, this combination
3091 // is equivalent to +UseISM -UseMPSS.
3093 typedef int (*getpagesizes_func_type) (size_t[], int);
3094 static size_t _large_page_size = 0;
3096 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) {
3097 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address
3098 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc
3099 // can support multiple page sizes.
3101 // Don't bother to probe page size because getpagesizes() comes with MPSS.
3102 // ISM is only recommended on old Solaris where there is no MPSS support.
3103 // Simply choose a conservative value as default.
3104 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes :
3105 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M);
3107 // ISM is available on all supported Solaris versions
3108 return true;
3109 }
3111 // Insertion sort for small arrays (descending order).
3112 static void insertion_sort_descending(size_t* array, int len) {
3113 for (int i = 0; i < len; i++) {
3114 size_t val = array[i];
3115 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3116 size_t tmp = array[key];
3117 array[key] = array[key - 1];
3118 array[key - 1] = tmp;
3119 }
3120 }
3121 }
3123 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
3124 getpagesizes_func_type getpagesizes_func =
3125 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes"));
3126 if (getpagesizes_func == NULL) {
3127 if (warn) {
3128 warning("MPSS is not supported by the operating system.");
3129 }
3130 return false;
3131 }
3133 const unsigned int usable_count = VM_Version::page_size_count();
3134 if (usable_count == 1) {
3135 return false;
3136 }
3138 // Fill the array of page sizes.
3139 int n = getpagesizes_func(_page_sizes, page_sizes_max);
3140 assert(n > 0, "Solaris bug?");
3141 if (n == page_sizes_max) {
3142 // Add a sentinel value (necessary only if the array was completely filled
3143 // since it is static (zeroed at initialization)).
3144 _page_sizes[--n] = 0;
3145 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3146 }
3147 assert(_page_sizes[n] == 0, "missing sentinel");
3149 if (n == 1) return false; // Only one page size available.
3151 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3152 // select up to usable_count elements. First sort the array, find the first
3153 // acceptable value, then copy the usable sizes to the top of the array and
3154 // trim the rest. Make sure to include the default page size :-).
3155 //
3156 // A better policy could get rid of the 4M limit by taking the sizes of the
3157 // important VM memory regions (java heap and possibly the code cache) into
3158 // account.
3159 insertion_sort_descending(_page_sizes, n);
3160 const size_t size_limit =
3161 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3162 int beg;
3163 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
3164 const int end = MIN2((int)usable_count, n) - 1;
3165 for (int cur = 0; cur < end; ++cur, ++beg) {
3166 _page_sizes[cur] = _page_sizes[beg];
3167 }
3168 _page_sizes[end] = vm_page_size();
3169 _page_sizes[end + 1] = 0;
3171 if (_page_sizes[end] > _page_sizes[end - 1]) {
3172 // Default page size is not the smallest; sort again.
3173 insertion_sort_descending(_page_sizes, end + 1);
3174 }
3175 *page_size = _page_sizes[0];
3177 return true;
3178 }
3180 bool os::large_page_init() {
3181 if (!UseLargePages) {
3182 UseISM = false;
3183 UseMPSS = false;
3184 return false;
3185 }
3187 // print a warning if any large page related flag is specified on command line
3188 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3189 !FLAG_IS_DEFAULT(UseISM) ||
3190 !FLAG_IS_DEFAULT(UseMPSS) ||
3191 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3192 UseISM = UseISM &&
3193 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size);
3194 if (UseISM) {
3195 // ISM disables MPSS to be compatible with old JDK behavior
3196 UseMPSS = false;
3197 _page_sizes[0] = _large_page_size;
3198 _page_sizes[1] = vm_page_size();
3199 }
3201 UseMPSS = UseMPSS &&
3202 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3204 UseLargePages = UseISM || UseMPSS;
3205 return UseLargePages;
3206 }
3208 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) {
3209 // Signal to OS that we want large pages for addresses
3210 // from addr, addr + bytes
3211 struct memcntl_mha mpss_struct;
3212 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3213 mpss_struct.mha_pagesize = align;
3214 mpss_struct.mha_flags = 0;
3215 if (memcntl(start, bytes, MC_HAT_ADVISE,
3216 (caddr_t) &mpss_struct, 0, 0) < 0) {
3217 debug_only(warning("Attempt to use MPSS failed."));
3218 return false;
3219 }
3220 return true;
3221 }
3223 char* os::reserve_memory_special(size_t bytes) {
3224 assert(UseLargePages && UseISM, "only for ISM large pages");
3226 size_t size = bytes;
3227 char* retAddr = NULL;
3228 int shmid;
3229 key_t ismKey;
3231 bool warn_on_failure = UseISM &&
3232 (!FLAG_IS_DEFAULT(UseLargePages) ||
3233 !FLAG_IS_DEFAULT(UseISM) ||
3234 !FLAG_IS_DEFAULT(LargePageSizeInBytes)
3235 );
3236 char msg[128];
3238 ismKey = IPC_PRIVATE;
3240 // Create a large shared memory region to attach to based on size.
3241 // Currently, size is the total size of the heap
3242 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT);
3243 if (shmid == -1){
3244 if (warn_on_failure) {
3245 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
3246 warning(msg);
3247 }
3248 return NULL;
3249 }
3251 // Attach to the region
3252 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W);
3253 int err = errno;
3255 // Remove shmid. If shmat() is successful, the actual shared memory segment
3256 // will be deleted when it's detached by shmdt() or when the process
3257 // terminates. If shmat() is not successful this will remove the shared
3258 // segment immediately.
3259 shmctl(shmid, IPC_RMID, NULL);
3261 if (retAddr == (char *) -1) {
3262 if (warn_on_failure) {
3263 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
3264 warning(msg);
3265 }
3266 return NULL;
3267 }
3269 return retAddr;
3270 }
3272 bool os::release_memory_special(char* base, size_t bytes) {
3273 // detaching the SHM segment will also delete it, see reserve_memory_special()
3274 int rslt = shmdt(base);
3275 return rslt == 0;
3276 }
3278 size_t os::large_page_size() {
3279 return _large_page_size;
3280 }
3282 // MPSS allows application to commit large page memory on demand; with ISM
3283 // the entire memory region must be allocated as shared memory.
3284 bool os::can_commit_large_page_memory() {
3285 return UseISM ? false : true;
3286 }
3288 bool os::can_execute_large_page_memory() {
3289 return UseISM ? false : true;
3290 }
3292 static int os_sleep(jlong millis, bool interruptible) {
3293 const jlong limit = INT_MAX;
3294 jlong prevtime;
3295 int res;
3297 while (millis > limit) {
3298 if ((res = os_sleep(limit, interruptible)) != OS_OK)
3299 return res;
3300 millis -= limit;
3301 }
3303 // Restart interrupted polls with new parameters until the proper delay
3304 // has been completed.
3306 prevtime = getTimeMillis();
3308 while (millis > 0) {
3309 jlong newtime;
3311 if (!interruptible) {
3312 // Following assert fails for os::yield_all:
3313 // assert(!thread->is_Java_thread(), "must not be java thread");
3314 res = poll(NULL, 0, millis);
3315 } else {
3316 JavaThread *jt = JavaThread::current();
3318 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt,
3319 os::Solaris::clear_interrupted);
3320 }
3322 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for
3323 // thread.Interrupt.
3325 if((res == OS_ERR) && (errno == EINTR)) {
3326 newtime = getTimeMillis();
3327 assert(newtime >= prevtime, "time moving backwards");
3328 /* Doing prevtime and newtime in microseconds doesn't help precision,
3329 and trying to round up to avoid lost milliseconds can result in a
3330 too-short delay. */
3331 millis -= newtime - prevtime;
3332 if(millis <= 0)
3333 return OS_OK;
3334 prevtime = newtime;
3335 } else
3336 return res;
3337 }
3339 return OS_OK;
3340 }
3342 // Read calls from inside the vm need to perform state transitions
3343 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3344 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3345 }
3347 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
3348 assert(thread == Thread::current(), "thread consistency check");
3350 // TODO-FIXME: this should be removed.
3351 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock
3352 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate
3353 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving
3354 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel
3355 // is fooled into believing that the system is making progress. In the code below we block the
3356 // the watcher thread while safepoint is in progress so that it would not appear as though the
3357 // system is making progress.
3358 if (!Solaris::T2_libthread() &&
3359 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) {
3360 // We now try to acquire the threads lock. Since this lock is held by the VM thread during
3361 // the entire safepoint, the watcher thread will line up here during the safepoint.
3362 Threads_lock->lock_without_safepoint_check();
3363 Threads_lock->unlock();
3364 }
3366 if (thread->is_Java_thread()) {
3367 // This is a JavaThread so we honor the _thread_blocked protocol
3368 // even for sleeps of 0 milliseconds. This was originally done
3369 // as a workaround for bug 4338139. However, now we also do it
3370 // to honor the suspend-equivalent protocol.
3372 JavaThread *jt = (JavaThread *) thread;
3373 ThreadBlockInVM tbivm(jt);
3375 jt->set_suspend_equivalent();
3376 // cleared by handle_special_suspend_equivalent_condition() or
3377 // java_suspend_self() via check_and_wait_while_suspended()
3379 int ret_code;
3380 if (millis <= 0) {
3381 thr_yield();
3382 ret_code = 0;
3383 } else {
3384 // The original sleep() implementation did not create an
3385 // OSThreadWaitState helper for sleeps of 0 milliseconds.
3386 // I'm preserving that decision for now.
3387 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
3389 ret_code = os_sleep(millis, interruptible);
3390 }
3392 // were we externally suspended while we were waiting?
3393 jt->check_and_wait_while_suspended();
3395 return ret_code;
3396 }
3398 // non-JavaThread from this point on:
3400 if (millis <= 0) {
3401 thr_yield();
3402 return 0;
3403 }
3405 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
3407 return os_sleep(millis, interruptible);
3408 }
3410 int os::naked_sleep() {
3411 // %% make the sleep time an integer flag. for now use 1 millisec.
3412 return os_sleep(1, false);
3413 }
3415 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3416 void os::infinite_sleep() {
3417 while (true) { // sleep forever ...
3418 ::sleep(100); // ... 100 seconds at a time
3419 }
3420 }
3422 // Used to convert frequent JVM_Yield() to nops
3423 bool os::dont_yield() {
3424 if (DontYieldALot) {
3425 static hrtime_t last_time = 0;
3426 hrtime_t diff = getTimeNanos() - last_time;
3428 if (diff < DontYieldALotInterval * 1000000)
3429 return true;
3431 last_time += diff;
3433 return false;
3434 }
3435 else {
3436 return false;
3437 }
3438 }
3440 // Caveat: Solaris os::yield() causes a thread-state transition whereas
3441 // the linux and win32 implementations do not. This should be checked.
3443 void os::yield() {
3444 // Yields to all threads with same or greater priority
3445 os::sleep(Thread::current(), 0, false);
3446 }
3448 // Note that yield semantics are defined by the scheduling class to which
3449 // the thread currently belongs. Typically, yield will _not yield to
3450 // other equal or higher priority threads that reside on the dispatch queues
3451 // of other CPUs.
3453 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
3456 // On Solaris we found that yield_all doesn't always yield to all other threads.
3457 // There have been cases where there is a thread ready to execute but it doesn't
3458 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
3459 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a
3460 // SIGWAITING signal which will cause a new lwp to be created. So we count the
3461 // number of times yield_all is called in the one loop and increase the sleep
3462 // time after 8 attempts. If this fails too we increase the concurrency level
3463 // so that the starving thread would get an lwp
3465 void os::yield_all(int attempts) {
3466 // Yields to all threads, including threads with lower priorities
3467 if (attempts == 0) {
3468 os::sleep(Thread::current(), 1, false);
3469 } else {
3470 int iterations = attempts % 30;
3471 if (iterations == 0 && !os::Solaris::T2_libthread()) {
3472 // thr_setconcurrency and _getconcurrency make sense only under T1.
3473 int noofLWPS = thr_getconcurrency();
3474 if (noofLWPS < (Threads::number_of_threads() + 2)) {
3475 thr_setconcurrency(thr_getconcurrency() + 1);
3476 }
3477 } else if (iterations < 25) {
3478 os::sleep(Thread::current(), 1, false);
3479 } else {
3480 os::sleep(Thread::current(), 10, false);
3481 }
3482 }
3483 }
3485 // Called from the tight loops to possibly influence time-sharing heuristics
3486 void os::loop_breaker(int attempts) {
3487 os::yield_all(attempts);
3488 }
3491 // Interface for setting lwp priorities. If we are using T2 libthread,
3492 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3493 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3494 // function is meaningless in this mode so we must adjust the real lwp's priority
3495 // The routines below implement the getting and setting of lwp priorities.
3496 //
3497 // Note: There are three priority scales used on Solaris. Java priotities
3498 // which range from 1 to 10, libthread "thr_setprio" scale which range
3499 // from 0 to 127, and the current scheduling class of the process we
3500 // are running in. This is typically from -60 to +60.
3501 // The setting of the lwp priorities in done after a call to thr_setprio
3502 // so Java priorities are mapped to libthread priorities and we map from
3503 // the latter to lwp priorities. We don't keep priorities stored in
3504 // Java priorities since some of our worker threads want to set priorities
3505 // higher than all Java threads.
3506 //
3507 // For related information:
3508 // (1) man -s 2 priocntl
3509 // (2) man -s 4 priocntl
3510 // (3) man dispadmin
3511 // = librt.so
3512 // = libthread/common/rtsched.c - thrp_setlwpprio().
3513 // = ps -cL <pid> ... to validate priority.
3514 // = sched_get_priority_min and _max
3515 // pthread_create
3516 // sched_setparam
3517 // pthread_setschedparam
3518 //
3519 // Assumptions:
3520 // + We assume that all threads in the process belong to the same
3521 // scheduling class. IE. an homogenous process.
3522 // + Must be root or in IA group to change change "interactive" attribute.
3523 // Priocntl() will fail silently. The only indication of failure is when
3524 // we read-back the value and notice that it hasn't changed.
3525 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3526 // + For RT, change timeslice as well. Invariant:
3527 // constant "priority integral"
3528 // Konst == TimeSlice * (60-Priority)
3529 // Given a priority, compute appropriate timeslice.
3530 // + Higher numerical values have higher priority.
3532 // sched class attributes
3533 typedef struct {
3534 int schedPolicy; // classID
3535 int maxPrio;
3536 int minPrio;
3537 } SchedInfo;
3540 static SchedInfo tsLimits, iaLimits, rtLimits;
3542 #ifdef ASSERT
3543 static int ReadBackValidate = 1;
3544 #endif
3545 static int myClass = 0;
3546 static int myMin = 0;
3547 static int myMax = 0;
3548 static int myCur = 0;
3549 static bool priocntl_enable = false;
3552 // Call the version of priocntl suitable for all supported versions
3553 // of Solaris. We need to call through this wrapper so that we can
3554 // build on Solaris 9 and run on Solaris 8, 9 and 10.
3555 //
3556 // This code should be removed if we ever stop supporting Solaris 8
3557 // and earlier releases.
3559 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3560 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3561 static priocntl_type priocntl_ptr = priocntl_stub;
3563 // Stub to set the value of the real pointer, and then call the real
3564 // function.
3566 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) {
3567 // Try Solaris 8- name only.
3568 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl");
3569 guarantee(tmp != NULL, "priocntl function not found.");
3570 priocntl_ptr = tmp;
3571 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg);
3572 }
3575 // lwp_priocntl_init
3576 //
3577 // Try to determine the priority scale for our process.
3578 //
3579 // Return errno or 0 if OK.
3580 //
3581 static
3582 int lwp_priocntl_init ()
3583 {
3584 int rslt;
3585 pcinfo_t ClassInfo;
3586 pcparms_t ParmInfo;
3587 int i;
3589 if (!UseThreadPriorities) return 0;
3591 // We are using Bound threads, we need to determine our priority ranges
3592 if (os::Solaris::T2_libthread() || UseBoundThreads) {
3593 // If ThreadPriorityPolicy is 1, switch tables
3594 if (ThreadPriorityPolicy == 1) {
3595 for (i = 0 ; i < MaxPriority+1; i++)
3596 os::java_to_os_priority[i] = prio_policy1[i];
3597 }
3598 }
3599 // Not using Bound Threads, set to ThreadPolicy 1
3600 else {
3601 for ( i = 0 ; i < MaxPriority+1; i++ ) {
3602 os::java_to_os_priority[i] = prio_policy1[i];
3603 }
3604 return 0;
3605 }
3608 // Get IDs for a set of well-known scheduling classes.
3609 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3610 // the system. We should have a loop that iterates over the
3611 // classID values, which are known to be "small" integers.
3613 strcpy(ClassInfo.pc_clname, "TS");
3614 ClassInfo.pc_cid = -1;
3615 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3616 if (rslt < 0) return errno;
3617 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3618 tsLimits.schedPolicy = ClassInfo.pc_cid;
3619 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3620 tsLimits.minPrio = -tsLimits.maxPrio;
3622 strcpy(ClassInfo.pc_clname, "IA");
3623 ClassInfo.pc_cid = -1;
3624 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3625 if (rslt < 0) return errno;
3626 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3627 iaLimits.schedPolicy = ClassInfo.pc_cid;
3628 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3629 iaLimits.minPrio = -iaLimits.maxPrio;
3631 strcpy(ClassInfo.pc_clname, "RT");
3632 ClassInfo.pc_cid = -1;
3633 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3634 if (rslt < 0) return errno;
3635 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3636 rtLimits.schedPolicy = ClassInfo.pc_cid;
3637 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3638 rtLimits.minPrio = 0;
3641 // Query our "current" scheduling class.
3642 // This will normally be IA,TS or, rarely, RT.
3643 memset (&ParmInfo, 0, sizeof(ParmInfo));
3644 ParmInfo.pc_cid = PC_CLNULL;
3645 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo );
3646 if ( rslt < 0 ) return errno;
3647 myClass = ParmInfo.pc_cid;
3649 // We now know our scheduling classId, get specific information
3650 // the class.
3651 ClassInfo.pc_cid = myClass;
3652 ClassInfo.pc_clname[0] = 0;
3653 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo );
3654 if ( rslt < 0 ) return errno;
3656 if (ThreadPriorityVerbose)
3657 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3659 memset(&ParmInfo, 0, sizeof(pcparms_t));
3660 ParmInfo.pc_cid = PC_CLNULL;
3661 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3662 if (rslt < 0) return errno;
3664 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3665 myMin = rtLimits.minPrio;
3666 myMax = rtLimits.maxPrio;
3667 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3668 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3669 myMin = iaLimits.minPrio;
3670 myMax = iaLimits.maxPrio;
3671 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3672 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3673 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3674 myMin = tsLimits.minPrio;
3675 myMax = tsLimits.maxPrio;
3676 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3677 } else {
3678 // No clue - punt
3679 if (ThreadPriorityVerbose)
3680 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
3681 return EINVAL; // no clue, punt
3682 }
3684 if (ThreadPriorityVerbose)
3685 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
3687 priocntl_enable = true; // Enable changing priorities
3688 return 0;
3689 }
3691 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3692 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3693 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3696 // scale_to_lwp_priority
3697 //
3698 // Convert from the libthread "thr_setprio" scale to our current
3699 // lwp scheduling class scale.
3700 //
3701 static
3702 int scale_to_lwp_priority (int rMin, int rMax, int x)
3703 {
3704 int v;
3706 if (x == 127) return rMax; // avoid round-down
3707 v = (((x*(rMax-rMin)))/128)+rMin;
3708 return v;
3709 }
3712 // set_lwp_priority
3713 //
3714 // Set the priority of the lwp. This call should only be made
3715 // when using bound threads (T2 threads are bound by default).
3716 //
3717 int set_lwp_priority (int ThreadID, int lwpid, int newPrio )
3718 {
3719 int rslt;
3720 int Actual, Expected, prv;
3721 pcparms_t ParmInfo; // for GET-SET
3722 #ifdef ASSERT
3723 pcparms_t ReadBack; // for readback
3724 #endif
3726 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3727 // Query current values.
3728 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3729 // Cache "pcparms_t" in global ParmCache.
3730 // TODO: elide set-to-same-value
3732 // If something went wrong on init, don't change priorities.
3733 if ( !priocntl_enable ) {
3734 if (ThreadPriorityVerbose)
3735 tty->print_cr("Trying to set priority but init failed, ignoring");
3736 return EINVAL;
3737 }
3740 // If lwp hasn't started yet, just return
3741 // the _start routine will call us again.
3742 if ( lwpid <= 0 ) {
3743 if (ThreadPriorityVerbose) {
3744 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set",
3745 ThreadID, newPrio);
3746 }
3747 return 0;
3748 }
3750 if (ThreadPriorityVerbose) {
3751 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3752 ThreadID, lwpid, newPrio);
3753 }
3755 memset(&ParmInfo, 0, sizeof(pcparms_t));
3756 ParmInfo.pc_cid = PC_CLNULL;
3757 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3758 if (rslt < 0) return errno;
3760 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3761 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3762 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio);
3763 rtInfo->rt_tqsecs = RT_NOCHANGE;
3764 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3765 if (ThreadPriorityVerbose) {
3766 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3767 }
3768 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3769 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3770 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim);
3771 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio);
3772 iaInfo->ia_uprilim = IA_NOCHANGE;
3773 iaInfo->ia_mode = IA_NOCHANGE;
3774 if (ThreadPriorityVerbose) {
3775 tty->print_cr ("IA: [%d...%d] %d->%d\n",
3776 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3777 }
3778 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3779 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3780 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim);
3781 prv = tsInfo->ts_upri;
3782 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio);
3783 tsInfo->ts_uprilim = IA_NOCHANGE;
3784 if (ThreadPriorityVerbose) {
3785 tty->print_cr ("TS: %d [%d...%d] %d->%d\n",
3786 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3787 }
3788 if (prv == tsInfo->ts_upri) return 0;
3789 } else {
3790 if ( ThreadPriorityVerbose ) {
3791 tty->print_cr ("Unknown scheduling class\n");
3792 }
3793 return EINVAL; // no clue, punt
3794 }
3796 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3797 if (ThreadPriorityVerbose && rslt) {
3798 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3799 }
3800 if (rslt < 0) return errno;
3802 #ifdef ASSERT
3803 // Sanity check: read back what we just attempted to set.
3804 // In theory it could have changed in the interim ...
3805 //
3806 // The priocntl system call is tricky.
3807 // Sometimes it'll validate the priority value argument and
3808 // return EINVAL if unhappy. At other times it fails silently.
3809 // Readbacks are prudent.
3811 if (!ReadBackValidate) return 0;
3813 memset(&ReadBack, 0, sizeof(pcparms_t));
3814 ReadBack.pc_cid = PC_CLNULL;
3815 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3816 assert(rslt >= 0, "priocntl failed");
3817 Actual = Expected = 0xBAD;
3818 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3819 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3820 Actual = RTPRI(ReadBack)->rt_pri;
3821 Expected = RTPRI(ParmInfo)->rt_pri;
3822 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3823 Actual = IAPRI(ReadBack)->ia_upri;
3824 Expected = IAPRI(ParmInfo)->ia_upri;
3825 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3826 Actual = TSPRI(ReadBack)->ts_upri;
3827 Expected = TSPRI(ParmInfo)->ts_upri;
3828 } else {
3829 if ( ThreadPriorityVerbose ) {
3830 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid);
3831 }
3832 }
3834 if (Actual != Expected) {
3835 if ( ThreadPriorityVerbose ) {
3836 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3837 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3838 }
3839 }
3840 #endif
3842 return 0;
3843 }
3847 // Solaris only gives access to 128 real priorities at a time,
3848 // so we expand Java's ten to fill this range. This would be better
3849 // if we dynamically adjusted relative priorities.
3850 //
3851 // The ThreadPriorityPolicy option allows us to select 2 different
3852 // priority scales.
3853 //
3854 // ThreadPriorityPolicy=0
3855 // Since the Solaris' default priority is MaximumPriority, we do not
3856 // set a priority lower than Max unless a priority lower than
3857 // NormPriority is requested.
3858 //
3859 // ThreadPriorityPolicy=1
3860 // This mode causes the priority table to get filled with
3861 // linear values. NormPriority get's mapped to 50% of the
3862 // Maximum priority an so on. This will cause VM threads
3863 // to get unfair treatment against other Solaris processes
3864 // which do not explicitly alter their thread priorities.
3865 //
3868 int os::java_to_os_priority[MaxPriority + 1] = {
3869 -99999, // 0 Entry should never be used
3871 0, // 1 MinPriority
3872 32, // 2
3873 64, // 3
3875 96, // 4
3876 127, // 5 NormPriority
3877 127, // 6
3879 127, // 7
3880 127, // 8
3881 127, // 9 NearMaxPriority
3883 127 // 10 MaxPriority
3884 };
3887 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3888 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3889 if ( !UseThreadPriorities ) return OS_OK;
3890 int status = thr_setprio(thread->osthread()->thread_id(), newpri);
3891 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) )
3892 status |= (set_lwp_priority (thread->osthread()->thread_id(),
3893 thread->osthread()->lwp_id(), newpri ));
3894 return (status == 0) ? OS_OK : OS_ERR;
3895 }
3898 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
3899 int p;
3900 if ( !UseThreadPriorities ) {
3901 *priority_ptr = NormalPriority;
3902 return OS_OK;
3903 }
3904 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3905 if (status != 0) {
3906 return OS_ERR;
3907 }
3908 *priority_ptr = p;
3909 return OS_OK;
3910 }
3913 // Hint to the underlying OS that a task switch would not be good.
3914 // Void return because it's a hint and can fail.
3915 void os::hint_no_preempt() {
3916 schedctl_start(schedctl_init());
3917 }
3919 void os::interrupt(Thread* thread) {
3920 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
3922 OSThread* osthread = thread->osthread();
3924 int isInterrupted = osthread->interrupted();
3925 if (!isInterrupted) {
3926 osthread->set_interrupted(true);
3927 OrderAccess::fence();
3928 // os::sleep() is implemented with either poll (NULL,0,timeout) or
3929 // by parking on _SleepEvent. If the former, thr_kill will unwedge
3930 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper.
3931 ParkEvent * const slp = thread->_SleepEvent ;
3932 if (slp != NULL) slp->unpark() ;
3933 }
3935 // For JSR166: unpark after setting status but before thr_kill -dl
3936 if (thread->is_Java_thread()) {
3937 ((JavaThread*)thread)->parker()->unpark();
3938 }
3940 // Handle interruptible wait() ...
3941 ParkEvent * const ev = thread->_ParkEvent ;
3942 if (ev != NULL) ev->unpark() ;
3944 // When events are used everywhere for os::sleep, then this thr_kill
3945 // will only be needed if UseVMInterruptibleIO is true.
3947 if (!isInterrupted) {
3948 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt());
3949 assert_status(status == 0, status, "thr_kill");
3951 // Bump thread interruption counter
3952 RuntimeService::record_thread_interrupt_signaled_count();
3953 }
3954 }
3957 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
3958 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
3960 OSThread* osthread = thread->osthread();
3962 bool res = osthread->interrupted();
3964 // NOTE that since there is no "lock" around these two operations,
3965 // there is the possibility that the interrupted flag will be
3966 // "false" but that the interrupt event will be set. This is
3967 // intentional. The effect of this is that Object.wait() will appear
3968 // to have a spurious wakeup, which is not harmful, and the
3969 // possibility is so rare that it is not worth the added complexity
3970 // to add yet another lock. It has also been recommended not to put
3971 // the interrupted flag into the os::Solaris::Event structure,
3972 // because it hides the issue.
3973 if (res && clear_interrupted) {
3974 osthread->set_interrupted(false);
3975 }
3976 return res;
3977 }
3980 void os::print_statistics() {
3981 }
3983 int os::message_box(const char* title, const char* message) {
3984 int i;
3985 fdStream err(defaultStream::error_fd());
3986 for (i = 0; i < 78; i++) err.print_raw("=");
3987 err.cr();
3988 err.print_raw_cr(title);
3989 for (i = 0; i < 78; i++) err.print_raw("-");
3990 err.cr();
3991 err.print_raw_cr(message);
3992 for (i = 0; i < 78; i++) err.print_raw("=");
3993 err.cr();
3995 char buf[16];
3996 // Prevent process from exiting upon "read error" without consuming all CPU
3997 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3999 return buf[0] == 'y' || buf[0] == 'Y';
4000 }
4002 // A lightweight implementation that does not suspend the target thread and
4003 // thus returns only a hint. Used for profiling only!
4004 ExtendedPC os::get_thread_pc(Thread* thread) {
4005 // Make sure that it is called by the watcher and the Threads lock is owned.
4006 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
4007 // For now, is only used to profile the VM Thread
4008 assert(thread->is_VM_thread(), "Can only be called for VMThread");
4009 ExtendedPC epc;
4011 GetThreadPC_Callback cb(ProfileVM_lock);
4012 OSThread *osthread = thread->osthread();
4013 const int time_to_wait = 400; // 400ms wait for initial response
4014 int status = cb.interrupt(thread, time_to_wait);
4016 if (cb.is_done() ) {
4017 epc = cb.addr();
4018 } else {
4019 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status",
4020 osthread->thread_id(), status););
4021 // epc is already NULL
4022 }
4023 return epc;
4024 }
4027 // This does not do anything on Solaris. This is basically a hook for being
4028 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
4029 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
4030 f(value, method, args, thread);
4031 }
4033 // This routine may be used by user applications as a "hook" to catch signals.
4034 // The user-defined signal handler must pass unrecognized signals to this
4035 // routine, and if it returns true (non-zero), then the signal handler must
4036 // return immediately. If the flag "abort_if_unrecognized" is true, then this
4037 // routine will never retun false (zero), but instead will execute a VM panic
4038 // routine kill the process.
4039 //
4040 // If this routine returns false, it is OK to call it again. This allows
4041 // the user-defined signal handler to perform checks either before or after
4042 // the VM performs its own checks. Naturally, the user code would be making
4043 // a serious error if it tried to handle an exception (such as a null check
4044 // or breakpoint) that the VM was generating for its own correct operation.
4045 //
4046 // This routine may recognize any of the following kinds of signals:
4047 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
4048 // os::Solaris::SIGasync
4049 // It should be consulted by handlers for any of those signals.
4050 // It explicitly does not recognize os::Solaris::SIGinterrupt
4051 //
4052 // The caller of this routine must pass in the three arguments supplied
4053 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
4054 // field of the structure passed to sigaction(). This routine assumes that
4055 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
4056 //
4057 // Note that the VM will print warnings if it detects conflicting signal
4058 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
4059 //
4060 extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized);
4063 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
4064 JVM_handle_solaris_signal(sig, info, ucVoid, true);
4065 }
4067 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
4068 is needed to provoke threads blocked on IO to return an EINTR
4069 Note: this explicitly does NOT call JVM_handle_solaris_signal and
4070 does NOT participate in signal chaining due to requirement for
4071 NOT setting SA_RESTART to make EINTR work. */
4072 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
4073 if (UseSignalChaining) {
4074 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
4075 if (actp && actp->sa_handler) {
4076 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
4077 }
4078 }
4079 }
4081 // This boolean allows users to forward their own non-matching signals
4082 // to JVM_handle_solaris_signal, harmlessly.
4083 bool os::Solaris::signal_handlers_are_installed = false;
4085 // For signal-chaining
4086 bool os::Solaris::libjsig_is_loaded = false;
4087 typedef struct sigaction *(*get_signal_t)(int);
4088 get_signal_t os::Solaris::get_signal_action = NULL;
4090 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
4091 struct sigaction *actp = NULL;
4093 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
4094 // Retrieve the old signal handler from libjsig
4095 actp = (*get_signal_action)(sig);
4096 }
4097 if (actp == NULL) {
4098 // Retrieve the preinstalled signal handler from jvm
4099 actp = get_preinstalled_handler(sig);
4100 }
4102 return actp;
4103 }
4105 static bool call_chained_handler(struct sigaction *actp, int sig,
4106 siginfo_t *siginfo, void *context) {
4107 // Call the old signal handler
4108 if (actp->sa_handler == SIG_DFL) {
4109 // It's more reasonable to let jvm treat it as an unexpected exception
4110 // instead of taking the default action.
4111 return false;
4112 } else if (actp->sa_handler != SIG_IGN) {
4113 if ((actp->sa_flags & SA_NODEFER) == 0) {
4114 // automaticlly block the signal
4115 sigaddset(&(actp->sa_mask), sig);
4116 }
4118 sa_handler_t hand;
4119 sa_sigaction_t sa;
4120 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4121 // retrieve the chained handler
4122 if (siginfo_flag_set) {
4123 sa = actp->sa_sigaction;
4124 } else {
4125 hand = actp->sa_handler;
4126 }
4128 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4129 actp->sa_handler = SIG_DFL;
4130 }
4132 // try to honor the signal mask
4133 sigset_t oset;
4134 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4136 // call into the chained handler
4137 if (siginfo_flag_set) {
4138 (*sa)(sig, siginfo, context);
4139 } else {
4140 (*hand)(sig);
4141 }
4143 // restore the signal mask
4144 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4145 }
4146 // Tell jvm's signal handler the signal is taken care of.
4147 return true;
4148 }
4150 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4151 bool chained = false;
4152 // signal-chaining
4153 if (UseSignalChaining) {
4154 struct sigaction *actp = get_chained_signal_action(sig);
4155 if (actp != NULL) {
4156 chained = call_chained_handler(actp, sig, siginfo, context);
4157 }
4158 }
4159 return chained;
4160 }
4162 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4163 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4164 if (preinstalled_sigs[sig] != 0) {
4165 return &chainedsigactions[sig];
4166 }
4167 return NULL;
4168 }
4170 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
4172 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4173 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4174 chainedsigactions[sig] = oldAct;
4175 preinstalled_sigs[sig] = 1;
4176 }
4178 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
4179 // Check for overwrite.
4180 struct sigaction oldAct;
4181 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4182 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4183 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4184 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4185 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4186 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4187 if (AllowUserSignalHandlers || !set_installed) {
4188 // Do not overwrite; user takes responsibility to forward to us.
4189 return;
4190 } else if (UseSignalChaining) {
4191 if (oktochain) {
4192 // save the old handler in jvm
4193 save_preinstalled_handler(sig, oldAct);
4194 } else {
4195 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4196 }
4197 // libjsig also interposes the sigaction() call below and saves the
4198 // old sigaction on it own.
4199 } else {
4200 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig);
4201 }
4202 }
4204 struct sigaction sigAct;
4205 sigfillset(&(sigAct.sa_mask));
4206 sigAct.sa_handler = SIG_DFL;
4208 sigAct.sa_sigaction = signalHandler;
4209 // Handle SIGSEGV on alternate signal stack if
4210 // not using stack banging
4211 if (!UseStackBanging && sig == SIGSEGV) {
4212 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4213 // Interruptible i/o requires SA_RESTART cleared so EINTR
4214 // is returned instead of restarting system calls
4215 } else if (sig == os::Solaris::SIGinterrupt()) {
4216 sigemptyset(&sigAct.sa_mask);
4217 sigAct.sa_handler = NULL;
4218 sigAct.sa_flags = SA_SIGINFO;
4219 sigAct.sa_sigaction = sigINTRHandler;
4220 } else {
4221 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4222 }
4223 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4225 sigaction(sig, &sigAct, &oldAct);
4227 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4228 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4229 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4230 }
4233 #define DO_SIGNAL_CHECK(sig) \
4234 if (!sigismember(&check_signal_done, sig)) \
4235 os::Solaris::check_signal_handler(sig)
4237 // This method is a periodic task to check for misbehaving JNI applications
4238 // under CheckJNI, we can add any periodic checks here
4240 void os::run_periodic_checks() {
4241 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4242 // thereby preventing a NULL checks.
4243 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
4245 if (check_signals == false) return;
4247 // SEGV and BUS if overridden could potentially prevent
4248 // generation of hs*.log in the event of a crash, debugging
4249 // such a case can be very challenging, so we absolutely
4250 // check for the following for a good measure:
4251 DO_SIGNAL_CHECK(SIGSEGV);
4252 DO_SIGNAL_CHECK(SIGILL);
4253 DO_SIGNAL_CHECK(SIGFPE);
4254 DO_SIGNAL_CHECK(SIGBUS);
4255 DO_SIGNAL_CHECK(SIGPIPE);
4256 DO_SIGNAL_CHECK(SIGXFSZ);
4258 // ReduceSignalUsage allows the user to override these handlers
4259 // see comments at the very top and jvm_solaris.h
4260 if (!ReduceSignalUsage) {
4261 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4262 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4263 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4264 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4265 }
4267 // See comments above for using JVM1/JVM2 and UseAltSigs
4268 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4269 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4271 }
4273 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4275 static os_sigaction_t os_sigaction = NULL;
4277 void os::Solaris::check_signal_handler(int sig) {
4278 char buf[O_BUFLEN];
4279 address jvmHandler = NULL;
4281 struct sigaction act;
4282 if (os_sigaction == NULL) {
4283 // only trust the default sigaction, in case it has been interposed
4284 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4285 if (os_sigaction == NULL) return;
4286 }
4288 os_sigaction(sig, (struct sigaction*)NULL, &act);
4290 address thisHandler = (act.sa_flags & SA_SIGINFO)
4291 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4292 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
4295 switch(sig) {
4296 case SIGSEGV:
4297 case SIGBUS:
4298 case SIGFPE:
4299 case SIGPIPE:
4300 case SIGXFSZ:
4301 case SIGILL:
4302 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4303 break;
4305 case SHUTDOWN1_SIGNAL:
4306 case SHUTDOWN2_SIGNAL:
4307 case SHUTDOWN3_SIGNAL:
4308 case BREAK_SIGNAL:
4309 jvmHandler = (address)user_handler();
4310 break;
4312 default:
4313 int intrsig = os::Solaris::SIGinterrupt();
4314 int asynsig = os::Solaris::SIGasync();
4316 if (sig == intrsig) {
4317 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4318 } else if (sig == asynsig) {
4319 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4320 } else {
4321 return;
4322 }
4323 break;
4324 }
4327 if (thisHandler != jvmHandler) {
4328 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4329 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4330 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4331 // No need to check this sig any longer
4332 sigaddset(&check_signal_done, sig);
4333 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4334 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4335 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4336 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4337 // No need to check this sig any longer
4338 sigaddset(&check_signal_done, sig);
4339 }
4341 // Print all the signal handler state
4342 if (sigismember(&check_signal_done, sig)) {
4343 print_signal_handlers(tty, buf, O_BUFLEN);
4344 }
4346 }
4348 void os::Solaris::install_signal_handlers() {
4349 bool libjsigdone = false;
4350 signal_handlers_are_installed = true;
4352 // signal-chaining
4353 typedef void (*signal_setting_t)();
4354 signal_setting_t begin_signal_setting = NULL;
4355 signal_setting_t end_signal_setting = NULL;
4356 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4357 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4358 if (begin_signal_setting != NULL) {
4359 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4360 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4361 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4362 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4363 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4364 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4365 libjsig_is_loaded = true;
4366 if (os::Solaris::get_libjsig_version != NULL) {
4367 libjsigversion = (*os::Solaris::get_libjsig_version)();
4368 }
4369 assert(UseSignalChaining, "should enable signal-chaining");
4370 }
4371 if (libjsig_is_loaded) {
4372 // Tell libjsig jvm is setting signal handlers
4373 (*begin_signal_setting)();
4374 }
4376 set_signal_handler(SIGSEGV, true, true);
4377 set_signal_handler(SIGPIPE, true, true);
4378 set_signal_handler(SIGXFSZ, true, true);
4379 set_signal_handler(SIGBUS, true, true);
4380 set_signal_handler(SIGILL, true, true);
4381 set_signal_handler(SIGFPE, true, true);
4384 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4386 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4387 // can not register overridable signals which might be > 32
4388 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4389 // Tell libjsig jvm has finished setting signal handlers
4390 (*end_signal_setting)();
4391 libjsigdone = true;
4392 }
4393 }
4395 // Never ok to chain our SIGinterrupt
4396 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4397 set_signal_handler(os::Solaris::SIGasync(), true, true);
4399 if (libjsig_is_loaded && !libjsigdone) {
4400 // Tell libjsig jvm finishes setting signal handlers
4401 (*end_signal_setting)();
4402 }
4404 // We don't activate signal checker if libjsig is in place, we trust ourselves
4405 // and if UserSignalHandler is installed all bets are off
4406 if (CheckJNICalls) {
4407 if (libjsig_is_loaded) {
4408 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4409 check_signals = false;
4410 }
4411 if (AllowUserSignalHandlers) {
4412 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4413 check_signals = false;
4414 }
4415 }
4416 }
4419 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
4421 const char * signames[] = {
4422 "SIG0",
4423 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4424 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4425 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4426 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4427 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4428 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4429 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4430 "SIGCANCEL", "SIGLOST"
4431 };
4433 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4434 if (0 < exception_code && exception_code <= SIGRTMAX) {
4435 // signal
4436 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4437 jio_snprintf(buf, size, "%s", signames[exception_code]);
4438 } else {
4439 jio_snprintf(buf, size, "SIG%d", exception_code);
4440 }
4441 return buf;
4442 } else {
4443 return NULL;
4444 }
4445 }
4447 // (Static) wrappers for the new libthread API
4448 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
4449 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
4450 int_fnP_thread_t_i os::Solaris::_thr_setmutator;
4451 int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
4452 int_fnP_thread_t os::Solaris::_thr_continue_mutator;
4454 // (Static) wrappers for the liblgrp API
4455 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4456 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4457 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4458 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4459 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4460 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4461 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4462 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4463 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4465 // (Static) wrapper for meminfo() call.
4466 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4468 static address resolve_symbol(const char *name) {
4469 address addr;
4471 addr = (address) dlsym(RTLD_DEFAULT, name);
4472 if(addr == NULL) {
4473 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4474 addr = (address) dlsym(RTLD_NEXT, name);
4475 if(addr == NULL) {
4476 fatal(dlerror());
4477 }
4478 }
4479 return addr;
4480 }
4484 // isT2_libthread()
4485 //
4486 // Routine to determine if we are currently using the new T2 libthread.
4487 //
4488 // We determine if we are using T2 by reading /proc/self/lstatus and
4489 // looking for a thread with the ASLWP bit set. If we find this status
4490 // bit set, we must assume that we are NOT using T2. The T2 team
4491 // has approved this algorithm.
4492 //
4493 // We need to determine if we are running with the new T2 libthread
4494 // since setting native thread priorities is handled differently
4495 // when using this library. All threads created using T2 are bound
4496 // threads. Calling thr_setprio is meaningless in this case.
4497 //
4498 bool isT2_libthread() {
4499 static prheader_t * lwpArray = NULL;
4500 static int lwpSize = 0;
4501 static int lwpFile = -1;
4502 lwpstatus_t * that;
4503 char lwpName [128];
4504 bool isT2 = false;
4506 #define ADR(x) ((uintptr_t)(x))
4507 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
4509 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0);
4510 if (lwpFile < 0) {
4511 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n");
4512 return false;
4513 }
4514 lwpSize = 16*1024;
4515 for (;;) {
4516 lseek (lwpFile, 0, SEEK_SET);
4517 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize);
4518 if (read(lwpFile, lwpArray, lwpSize) < 0) {
4519 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n");
4520 break;
4521 }
4522 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
4523 // We got a good snapshot - now iterate over the list.
4524 int aslwpcount = 0;
4525 for (int i = 0; i < lwpArray->pr_nent; i++ ) {
4526 that = LWPINDEX(lwpArray,i);
4527 if (that->pr_flags & PR_ASLWP) {
4528 aslwpcount++;
4529 }
4530 }
4531 if (aslwpcount == 0) isT2 = true;
4532 break;
4533 }
4534 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
4535 FREE_C_HEAP_ARRAY(char, lwpArray); // retry.
4536 }
4538 FREE_C_HEAP_ARRAY(char, lwpArray);
4539 close (lwpFile);
4540 if (ThreadPriorityVerbose) {
4541 if (isT2) tty->print_cr("We are running with a T2 libthread\n");
4542 else tty->print_cr("We are not running with a T2 libthread\n");
4543 }
4544 return isT2;
4545 }
4548 void os::Solaris::libthread_init() {
4549 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4551 // Determine if we are running with the new T2 libthread
4552 os::Solaris::set_T2_libthread(isT2_libthread());
4554 lwp_priocntl_init();
4556 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4557 if(func == NULL) {
4558 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4559 // Guarantee that this VM is running on an new enough OS (5.6 or
4560 // later) that it will have a new enough libthread.so.
4561 guarantee(func != NULL, "libthread.so is too old.");
4562 }
4564 // Initialize the new libthread getstate API wrappers
4565 func = resolve_symbol("thr_getstate");
4566 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
4568 func = resolve_symbol("thr_setstate");
4569 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
4571 func = resolve_symbol("thr_setmutator");
4572 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
4574 func = resolve_symbol("thr_suspend_mutator");
4575 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4577 func = resolve_symbol("thr_continue_mutator");
4578 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4580 int size;
4581 void (*handler_info_func)(address *, int *);
4582 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4583 handler_info_func(&handler_start, &size);
4584 handler_end = handler_start + size;
4585 }
4588 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4589 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4590 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4591 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4592 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4593 int os::Solaris::_mutex_scope = USYNC_THREAD;
4595 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4596 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4597 int_fnP_cond_tP os::Solaris::_cond_signal;
4598 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4599 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4600 int_fnP_cond_tP os::Solaris::_cond_destroy;
4601 int os::Solaris::_cond_scope = USYNC_THREAD;
4603 void os::Solaris::synchronization_init() {
4604 if(UseLWPSynchronization) {
4605 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4606 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4607 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4608 os::Solaris::set_mutex_init(lwp_mutex_init);
4609 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4610 os::Solaris::set_mutex_scope(USYNC_THREAD);
4612 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4613 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4614 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4615 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4616 os::Solaris::set_cond_init(lwp_cond_init);
4617 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4618 os::Solaris::set_cond_scope(USYNC_THREAD);
4619 }
4620 else {
4621 os::Solaris::set_mutex_scope(USYNC_THREAD);
4622 os::Solaris::set_cond_scope(USYNC_THREAD);
4624 if(UsePthreads) {
4625 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4626 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4627 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4628 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4629 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4631 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4632 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4633 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4634 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4635 os::Solaris::set_cond_init(pthread_cond_default_init);
4636 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4637 }
4638 else {
4639 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4640 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4641 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4642 os::Solaris::set_mutex_init(::mutex_init);
4643 os::Solaris::set_mutex_destroy(::mutex_destroy);
4645 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4646 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4647 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4648 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4649 os::Solaris::set_cond_init(::cond_init);
4650 os::Solaris::set_cond_destroy(::cond_destroy);
4651 }
4652 }
4653 }
4655 bool os::Solaris::liblgrp_init() {
4656 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4657 if (handle != NULL) {
4658 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4659 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4660 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4661 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4662 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4663 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4664 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4665 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4666 dlsym(handle, "lgrp_cookie_stale")));
4668 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4669 set_lgrp_cookie(c);
4670 return true;
4671 }
4672 return false;
4673 }
4675 void os::Solaris::misc_sym_init() {
4676 address func = (address)dlsym(RTLD_DEFAULT, "meminfo");
4677 if(func == NULL) {
4678 func = (address) dlsym(RTLD_NEXT, "meminfo");
4679 }
4680 if (func != NULL) {
4681 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4682 }
4683 }
4685 // Symbol doesn't exist in Solaris 8 pset.h
4686 #ifndef PS_MYID
4687 #define PS_MYID -3
4688 #endif
4690 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4691 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4692 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4694 void init_pset_getloadavg_ptr(void) {
4695 pset_getloadavg_ptr =
4696 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4697 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4698 warning("pset_getloadavg function not found");
4699 }
4700 }
4702 int os::Solaris::_dev_zero_fd = -1;
4704 // this is called _before_ the global arguments have been parsed
4705 void os::init(void) {
4706 _initial_pid = getpid();
4708 max_hrtime = first_hrtime = gethrtime();
4710 init_random(1234567);
4712 page_size = sysconf(_SC_PAGESIZE);
4713 if (page_size == -1)
4714 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno));
4715 init_page_sizes((size_t) page_size);
4717 Solaris::initialize_system_info();
4719 int fd = open("/dev/zero", O_RDWR);
4720 if (fd < 0) {
4721 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno));
4722 } else {
4723 Solaris::set_dev_zero_fd(fd);
4725 // Close on exec, child won't inherit.
4726 fcntl(fd, F_SETFD, FD_CLOEXEC);
4727 }
4729 clock_tics_per_sec = CLK_TCK;
4731 // check if dladdr1() exists; dladdr1 can provide more information than
4732 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4733 // and is available on linker patches for 5.7 and 5.8.
4734 // libdl.so must have been loaded, this call is just an entry lookup
4735 void * hdl = dlopen("libdl.so", RTLD_NOW);
4736 if (hdl)
4737 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4739 // (Solaris only) this switches to calls that actually do locking.
4740 ThreadCritical::initialize();
4742 main_thread = thr_self();
4744 // Constant minimum stack size allowed. It must be at least
4745 // the minimum of what the OS supports (thr_min_stack()), and
4746 // enough to allow the thread to get to user bytecode execution.
4747 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4748 // If the pagesize of the VM is greater than 8K determine the appropriate
4749 // number of initial guard pages. The user can change this with the
4750 // command line arguments, if needed.
4751 if (vm_page_size() > 8*K) {
4752 StackYellowPages = 1;
4753 StackRedPages = 1;
4754 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4755 }
4756 }
4758 // To install functions for atexit system call
4759 extern "C" {
4760 static void perfMemory_exit_helper() {
4761 perfMemory_exit();
4762 }
4763 }
4765 // this is called _after_ the global arguments have been parsed
4766 jint os::init_2(void) {
4767 // try to enable extended file IO ASAP, see 6431278
4768 os::Solaris::try_enable_extended_io();
4770 // Allocate a single page and mark it as readable for safepoint polling. Also
4771 // use this first mmap call to check support for MAP_ALIGN.
4772 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4773 page_size,
4774 MAP_PRIVATE | MAP_ALIGN,
4775 PROT_READ);
4776 if (polling_page == NULL) {
4777 has_map_align = false;
4778 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4779 PROT_READ);
4780 }
4782 os::set_polling_page(polling_page);
4784 #ifndef PRODUCT
4785 if( Verbose && PrintMiscellaneous )
4786 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
4787 #endif
4789 if (!UseMembar) {
4790 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
4791 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
4792 os::set_memory_serialize_page( mem_serialize_page );
4794 #ifndef PRODUCT
4795 if(Verbose && PrintMiscellaneous)
4796 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
4797 #endif
4798 }
4800 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init());
4802 // Check minimum allowable stack size for thread creation and to initialize
4803 // the java system classes, including StackOverflowError - depends on page
4804 // size. Add a page for compiler2 recursion in main thread.
4805 // Add in BytesPerWord times page size to account for VM stack during
4806 // class initialization depending on 32 or 64 bit VM.
4807 guarantee((Solaris::min_stack_allowed >=
4808 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord
4809 COMPILER2_PRESENT(+1)) * page_size),
4810 "need to increase Solaris::min_stack_allowed on this platform");
4812 size_t threadStackSizeInBytes = ThreadStackSize * K;
4813 if (threadStackSizeInBytes != 0 &&
4814 threadStackSizeInBytes < Solaris::min_stack_allowed) {
4815 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
4816 Solaris::min_stack_allowed/K);
4817 return JNI_ERR;
4818 }
4820 // For 64kbps there will be a 64kb page size, which makes
4821 // the usable default stack size quite a bit less. Increase the
4822 // stack for 64kb (or any > than 8kb) pages, this increases
4823 // virtual memory fragmentation (since we're not creating the
4824 // stack on a power of 2 boundary. The real fix for this
4825 // should be to fix the guard page mechanism.
4827 if (vm_page_size() > 8*K) {
4828 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
4829 ? threadStackSizeInBytes +
4830 ((StackYellowPages + StackRedPages) * vm_page_size())
4831 : 0;
4832 ThreadStackSize = threadStackSizeInBytes/K;
4833 }
4835 // Make the stack size a multiple of the page size so that
4836 // the yellow/red zones can be guarded.
4837 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
4838 vm_page_size()));
4840 Solaris::libthread_init();
4842 if (UseNUMA) {
4843 if (!Solaris::liblgrp_init()) {
4844 UseNUMA = false;
4845 } else {
4846 size_t lgrp_limit = os::numa_get_groups_num();
4847 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit);
4848 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4849 FREE_C_HEAP_ARRAY(int, lgrp_ids);
4850 if (lgrp_num < 2) {
4851 // There's only one locality group, disable NUMA.
4852 UseNUMA = false;
4853 }
4854 }
4855 if (!UseNUMA && ForceNUMA) {
4856 UseNUMA = true;
4857 }
4858 }
4860 Solaris::misc_sym_init();
4861 Solaris::signal_sets_init();
4862 Solaris::init_signal_mem();
4863 Solaris::install_signal_handlers();
4865 if (libjsigversion < JSIG_VERSION_1_4_1) {
4866 Maxlibjsigsigs = OLDMAXSIGNUM;
4867 }
4869 // initialize synchronization primitives to use either thread or
4870 // lwp synchronization (controlled by UseLWPSynchronization)
4871 Solaris::synchronization_init();
4873 if (MaxFDLimit) {
4874 // set the number of file descriptors to max. print out error
4875 // if getrlimit/setrlimit fails but continue regardless.
4876 struct rlimit nbr_files;
4877 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4878 if (status != 0) {
4879 if (PrintMiscellaneous && (Verbose || WizardMode))
4880 perror("os::init_2 getrlimit failed");
4881 } else {
4882 nbr_files.rlim_cur = nbr_files.rlim_max;
4883 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4884 if (status != 0) {
4885 if (PrintMiscellaneous && (Verbose || WizardMode))
4886 perror("os::init_2 setrlimit failed");
4887 }
4888 }
4889 }
4891 // Initialize HPI.
4892 jint hpi_result = hpi::initialize();
4893 if (hpi_result != JNI_OK) {
4894 tty->print_cr("There was an error trying to initialize the HPI library.");
4895 return hpi_result;
4896 }
4898 // Calculate theoretical max. size of Threads to guard gainst
4899 // artifical out-of-memory situations, where all available address-
4900 // space has been reserved by thread stacks. Default stack size is 1Mb.
4901 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
4902 JavaThread::stack_size_at_create() : (1*K*K);
4903 assert(pre_thread_stack_size != 0, "Must have a stack");
4904 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
4905 // we should start doing Virtual Memory banging. Currently when the threads will
4906 // have used all but 200Mb of space.
4907 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
4908 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
4910 // at-exit methods are called in the reverse order of their registration.
4911 // In Solaris 7 and earlier, atexit functions are called on return from
4912 // main or as a result of a call to exit(3C). There can be only 32 of
4913 // these functions registered and atexit() does not set errno. In Solaris
4914 // 8 and later, there is no limit to the number of functions registered
4915 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
4916 // functions are called upon dlclose(3DL) in addition to return from main
4917 // and exit(3C).
4919 if (PerfAllowAtExitRegistration) {
4920 // only register atexit functions if PerfAllowAtExitRegistration is set.
4921 // atexit functions can be delayed until process exit time, which
4922 // can be problematic for embedded VM situations. Embedded VMs should
4923 // call DestroyJavaVM() to assure that VM resources are released.
4925 // note: perfMemory_exit_helper atexit function may be removed in
4926 // the future if the appropriate cleanup code can be added to the
4927 // VM_Exit VMOperation's doit method.
4928 if (atexit(perfMemory_exit_helper) != 0) {
4929 warning("os::init2 atexit(perfMemory_exit_helper) failed");
4930 }
4931 }
4933 // Init pset_loadavg function pointer
4934 init_pset_getloadavg_ptr();
4936 return JNI_OK;
4937 }
4940 // Mark the polling page as unreadable
4941 void os::make_polling_page_unreadable(void) {
4942 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
4943 fatal("Could not disable polling page");
4944 };
4946 // Mark the polling page as readable
4947 void os::make_polling_page_readable(void) {
4948 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
4949 fatal("Could not enable polling page");
4950 };
4952 // OS interface.
4954 int os::stat(const char *path, struct stat *sbuf) {
4955 char pathbuf[MAX_PATH];
4956 if (strlen(path) > MAX_PATH - 1) {
4957 errno = ENAMETOOLONG;
4958 return -1;
4959 }
4960 hpi::native_path(strcpy(pathbuf, path));
4961 return ::stat(pathbuf, sbuf);
4962 }
4965 bool os::check_heap(bool force) { return true; }
4967 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
4968 static vsnprintf_t sol_vsnprintf = NULL;
4970 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
4971 if (!sol_vsnprintf) {
4972 //search for the named symbol in the objects that were loaded after libjvm
4973 void* where = RTLD_NEXT;
4974 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
4975 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
4976 if (!sol_vsnprintf){
4977 //search for the named symbol in the objects that were loaded before libjvm
4978 where = RTLD_DEFAULT;
4979 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
4980 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
4981 assert(sol_vsnprintf != NULL, "vsnprintf not found");
4982 }
4983 }
4984 return (*sol_vsnprintf)(buf, count, fmt, argptr);
4985 }
4988 // Is a (classpath) directory empty?
4989 bool os::dir_is_empty(const char* path) {
4990 DIR *dir = NULL;
4991 struct dirent *ptr;
4993 dir = opendir(path);
4994 if (dir == NULL) return true;
4996 /* Scan the directory */
4997 bool result = true;
4998 char buf[sizeof(struct dirent) + MAX_PATH];
4999 struct dirent *dbuf = (struct dirent *) buf;
5000 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
5001 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
5002 result = false;
5003 }
5004 }
5005 closedir(dir);
5006 return result;
5007 }
5009 // create binary file, rewriting existing file if required
5010 int os::create_binary_file(const char* path, bool rewrite_existing) {
5011 int oflags = O_WRONLY | O_CREAT;
5012 if (!rewrite_existing) {
5013 oflags |= O_EXCL;
5014 }
5015 return ::open64(path, oflags, S_IREAD | S_IWRITE);
5016 }
5018 // return current position of file pointer
5019 jlong os::current_file_offset(int fd) {
5020 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
5021 }
5023 // move file pointer to the specified offset
5024 jlong os::seek_to_file_offset(int fd, jlong offset) {
5025 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
5026 }
5028 // Map a block of memory.
5029 char* os::map_memory(int fd, const char* file_name, size_t file_offset,
5030 char *addr, size_t bytes, bool read_only,
5031 bool allow_exec) {
5032 int prot;
5033 int flags;
5035 if (read_only) {
5036 prot = PROT_READ;
5037 flags = MAP_SHARED;
5038 } else {
5039 prot = PROT_READ | PROT_WRITE;
5040 flags = MAP_PRIVATE;
5041 }
5043 if (allow_exec) {
5044 prot |= PROT_EXEC;
5045 }
5047 if (addr != NULL) {
5048 flags |= MAP_FIXED;
5049 }
5051 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5052 fd, file_offset);
5053 if (mapped_address == MAP_FAILED) {
5054 return NULL;
5055 }
5056 return mapped_address;
5057 }
5060 // Remap a block of memory.
5061 char* os::remap_memory(int fd, const char* file_name, size_t file_offset,
5062 char *addr, size_t bytes, bool read_only,
5063 bool allow_exec) {
5064 // same as map_memory() on this OS
5065 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5066 allow_exec);
5067 }
5070 // Unmap a block of memory.
5071 bool os::unmap_memory(char* addr, size_t bytes) {
5072 return munmap(addr, bytes) == 0;
5073 }
5075 void os::pause() {
5076 char filename[MAX_PATH];
5077 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5078 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5079 } else {
5080 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5081 }
5083 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5084 if (fd != -1) {
5085 struct stat buf;
5086 close(fd);
5087 while (::stat(filename, &buf) == 0) {
5088 (void)::poll(NULL, 0, 100);
5089 }
5090 } else {
5091 jio_fprintf(stderr,
5092 "Could not open pause file '%s', continuing immediately.\n", filename);
5093 }
5094 }
5096 #ifndef PRODUCT
5097 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5098 // Turn this on if you need to trace synch operations.
5099 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5100 // and call record_synch_enable and record_synch_disable
5101 // around the computation of interest.
5103 void record_synch(char* name, bool returning); // defined below
5105 class RecordSynch {
5106 char* _name;
5107 public:
5108 RecordSynch(char* name) :_name(name)
5109 { record_synch(_name, false); }
5110 ~RecordSynch() { record_synch(_name, true); }
5111 };
5113 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5114 extern "C" ret name params { \
5115 typedef ret name##_t params; \
5116 static name##_t* implem = NULL; \
5117 static int callcount = 0; \
5118 if (implem == NULL) { \
5119 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5120 if (implem == NULL) fatal(dlerror()); \
5121 } \
5122 ++callcount; \
5123 RecordSynch _rs(#name); \
5124 inner; \
5125 return implem args; \
5126 }
5127 // in dbx, examine callcounts this way:
5128 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5130 #define CHECK_POINTER_OK(p) \
5131 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p)))
5132 #define CHECK_MU \
5133 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5134 #define CHECK_CV \
5135 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5136 #define CHECK_P(p) \
5137 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5139 #define CHECK_MUTEX(mutex_op) \
5140 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5142 CHECK_MUTEX( mutex_lock)
5143 CHECK_MUTEX( _mutex_lock)
5144 CHECK_MUTEX( mutex_unlock)
5145 CHECK_MUTEX(_mutex_unlock)
5146 CHECK_MUTEX( mutex_trylock)
5147 CHECK_MUTEX(_mutex_trylock)
5149 #define CHECK_COND(cond_op) \
5150 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
5152 CHECK_COND( cond_wait);
5153 CHECK_COND(_cond_wait);
5154 CHECK_COND(_cond_wait_cancel);
5156 #define CHECK_COND2(cond_op) \
5157 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
5159 CHECK_COND2( cond_timedwait);
5160 CHECK_COND2(_cond_timedwait);
5161 CHECK_COND2(_cond_timedwait_cancel);
5163 // do the _lwp_* versions too
5164 #define mutex_t lwp_mutex_t
5165 #define cond_t lwp_cond_t
5166 CHECK_MUTEX( _lwp_mutex_lock)
5167 CHECK_MUTEX( _lwp_mutex_unlock)
5168 CHECK_MUTEX( _lwp_mutex_trylock)
5169 CHECK_MUTEX( __lwp_mutex_lock)
5170 CHECK_MUTEX( __lwp_mutex_unlock)
5171 CHECK_MUTEX( __lwp_mutex_trylock)
5172 CHECK_MUTEX(___lwp_mutex_lock)
5173 CHECK_MUTEX(___lwp_mutex_unlock)
5175 CHECK_COND( _lwp_cond_wait);
5176 CHECK_COND( __lwp_cond_wait);
5177 CHECK_COND(___lwp_cond_wait);
5179 CHECK_COND2( _lwp_cond_timedwait);
5180 CHECK_COND2( __lwp_cond_timedwait);
5181 #undef mutex_t
5182 #undef cond_t
5184 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5185 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5186 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5187 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5188 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5189 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5190 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5191 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5194 // recording machinery:
5196 enum { RECORD_SYNCH_LIMIT = 200 };
5197 char* record_synch_name[RECORD_SYNCH_LIMIT];
5198 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5199 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5200 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5201 int record_synch_count = 0;
5202 bool record_synch_enabled = false;
5204 // in dbx, examine recorded data this way:
5205 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5207 void record_synch(char* name, bool returning) {
5208 if (record_synch_enabled) {
5209 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5210 record_synch_name[record_synch_count] = name;
5211 record_synch_returning[record_synch_count] = returning;
5212 record_synch_thread[record_synch_count] = thr_self();
5213 record_synch_arg0ptr[record_synch_count] = &name;
5214 record_synch_count++;
5215 }
5216 // put more checking code here:
5217 // ...
5218 }
5219 }
5221 void record_synch_enable() {
5222 // start collecting trace data, if not already doing so
5223 if (!record_synch_enabled) record_synch_count = 0;
5224 record_synch_enabled = true;
5225 }
5227 void record_synch_disable() {
5228 // stop collecting trace data
5229 record_synch_enabled = false;
5230 }
5232 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5233 #endif // PRODUCT
5235 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5236 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5237 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5240 // JVMTI & JVM monitoring and management support
5241 // The thread_cpu_time() and current_thread_cpu_time() are only
5242 // supported if is_thread_cpu_time_supported() returns true.
5243 // They are not supported on Solaris T1.
5245 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5246 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5247 // of a thread.
5248 //
5249 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5250 // returns the fast estimate available on the platform.
5252 // hrtime_t gethrvtime() return value includes
5253 // user time but does not include system time
5254 jlong os::current_thread_cpu_time() {
5255 return (jlong) gethrvtime();
5256 }
5258 jlong os::thread_cpu_time(Thread *thread) {
5259 // return user level CPU time only to be consistent with
5260 // what current_thread_cpu_time returns.
5261 // thread_cpu_time_info() must be changed if this changes
5262 return os::thread_cpu_time(thread, false /* user time only */);
5263 }
5265 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5266 if (user_sys_cpu_time) {
5267 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5268 } else {
5269 return os::current_thread_cpu_time();
5270 }
5271 }
5273 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5274 char proc_name[64];
5275 int count;
5276 prusage_t prusage;
5277 jlong lwp_time;
5278 int fd;
5280 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5281 getpid(),
5282 thread->osthread()->lwp_id());
5283 fd = open(proc_name, O_RDONLY);
5284 if ( fd == -1 ) return -1;
5286 do {
5287 count = pread(fd,
5288 (void *)&prusage.pr_utime,
5289 thr_time_size,
5290 thr_time_off);
5291 } while (count < 0 && errno == EINTR);
5292 close(fd);
5293 if ( count < 0 ) return -1;
5295 if (user_sys_cpu_time) {
5296 // user + system CPU time
5297 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5298 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5299 (jlong)prusage.pr_stime.tv_nsec +
5300 (jlong)prusage.pr_utime.tv_nsec;
5301 } else {
5302 // user level CPU time only
5303 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5304 (jlong)prusage.pr_utime.tv_nsec;
5305 }
5307 return(lwp_time);
5308 }
5310 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5311 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5312 info_ptr->may_skip_backward = false; // elapsed time not wall time
5313 info_ptr->may_skip_forward = false; // elapsed time not wall time
5314 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5315 }
5317 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5318 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5319 info_ptr->may_skip_backward = false; // elapsed time not wall time
5320 info_ptr->may_skip_forward = false; // elapsed time not wall time
5321 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5322 }
5324 bool os::is_thread_cpu_time_supported() {
5325 if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
5326 return true;
5327 } else {
5328 return false;
5329 }
5330 }
5332 // System loadavg support. Returns -1 if load average cannot be obtained.
5333 // Return the load average for our processor set if the primitive exists
5334 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5335 int os::loadavg(double loadavg[], int nelem) {
5336 if (pset_getloadavg_ptr != NULL) {
5337 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5338 } else {
5339 return ::getloadavg(loadavg, nelem);
5340 }
5341 }
5343 //---------------------------------------------------------------------------------
5344 #ifndef PRODUCT
5346 static address same_page(address x, address y) {
5347 intptr_t page_bits = -os::vm_page_size();
5348 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
5349 return x;
5350 else if (x > y)
5351 return (address)(intptr_t(y) | ~page_bits) + 1;
5352 else
5353 return (address)(intptr_t(y) & page_bits);
5354 }
5356 bool os::find(address addr) {
5357 Dl_info dlinfo;
5358 memset(&dlinfo, 0, sizeof(dlinfo));
5359 if (dladdr(addr, &dlinfo)) {
5360 #ifdef _LP64
5361 tty->print("0x%016lx: ", addr);
5362 #else
5363 tty->print("0x%08x: ", addr);
5364 #endif
5365 if (dlinfo.dli_sname != NULL)
5366 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5367 else if (dlinfo.dli_fname)
5368 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5369 else
5370 tty->print("<absolute address>");
5371 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname);
5372 #ifdef _LP64
5373 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase);
5374 #else
5375 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase);
5376 #endif
5377 tty->cr();
5379 if (Verbose) {
5380 // decode some bytes around the PC
5381 address begin = same_page(addr-40, addr);
5382 address end = same_page(addr+40, addr);
5383 address lowest = (address) dlinfo.dli_sname;
5384 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5385 if (begin < lowest) begin = lowest;
5386 Dl_info dlinfo2;
5387 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
5388 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
5389 end = (address) dlinfo2.dli_saddr;
5390 Disassembler::decode(begin, end);
5391 }
5392 return true;
5393 }
5394 return false;
5395 }
5397 #endif
5400 // Following function has been added to support HotSparc's libjvm.so running
5401 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5402 // src/solaris/hpi/native_threads in the EVM codebase.
5403 //
5404 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5405 // libraries and should thus be removed. We will leave it behind for a while
5406 // until we no longer want to able to run on top of 1.3.0 Solaris production
5407 // JDK. See 4341971.
5409 #define STACK_SLACK 0x800
5411 extern "C" {
5412 intptr_t sysThreadAvailableStackWithSlack() {
5413 stack_t st;
5414 intptr_t retval, stack_top;
5415 retval = thr_stksegment(&st);
5416 assert(retval == 0, "incorrect return value from thr_stksegment");
5417 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5418 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5419 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5420 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5421 }
5422 }
5424 // Just to get the Kernel build to link on solaris for testing.
5426 extern "C" {
5427 class ASGCT_CallTrace;
5428 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext)
5429 KERNEL_RETURN;
5430 }
5433 // ObjectMonitor park-unpark infrastructure ...
5434 //
5435 // We implement Solaris and Linux PlatformEvents with the
5436 // obvious condvar-mutex-flag triple.
5437 // Another alternative that works quite well is pipes:
5438 // Each PlatformEvent consists of a pipe-pair.
5439 // The thread associated with the PlatformEvent
5440 // calls park(), which reads from the input end of the pipe.
5441 // Unpark() writes into the other end of the pipe.
5442 // The write-side of the pipe must be set NDELAY.
5443 // Unfortunately pipes consume a large # of handles.
5444 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5445 // Using pipes for the 1st few threads might be workable, however.
5446 //
5447 // park() is permitted to return spuriously.
5448 // Callers of park() should wrap the call to park() in
5449 // an appropriate loop. A litmus test for the correct
5450 // usage of park is the following: if park() were modified
5451 // to immediately return 0 your code should still work,
5452 // albeit degenerating to a spin loop.
5453 //
5454 // An interesting optimization for park() is to use a trylock()
5455 // to attempt to acquire the mutex. If the trylock() fails
5456 // then we know that a concurrent unpark() operation is in-progress.
5457 // in that case the park() code could simply set _count to 0
5458 // and return immediately. The subsequent park() operation *might*
5459 // return immediately. That's harmless as the caller of park() is
5460 // expected to loop. By using trylock() we will have avoided a
5461 // avoided a context switch caused by contention on the per-thread mutex.
5462 //
5463 // TODO-FIXME:
5464 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5465 // objectmonitor implementation.
5466 // 2. Collapse the JSR166 parker event, and the
5467 // objectmonitor ParkEvent into a single "Event" construct.
5468 // 3. In park() and unpark() add:
5469 // assert (Thread::current() == AssociatedWith).
5470 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5471 // 1-out-of-N park() operations will return immediately.
5472 //
5473 // _Event transitions in park()
5474 // -1 => -1 : illegal
5475 // 1 => 0 : pass - return immediately
5476 // 0 => -1 : block
5477 //
5478 // _Event serves as a restricted-range semaphore.
5479 //
5480 // Another possible encoding of _Event would be with
5481 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5482 //
5483 // TODO-FIXME: add DTRACE probes for:
5484 // 1. Tx parks
5485 // 2. Ty unparks Tx
5486 // 3. Tx resumes from park
5489 // value determined through experimentation
5490 #define ROUNDINGFIX 11
5492 // utility to compute the abstime argument to timedwait.
5493 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5495 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5496 // millis is the relative timeout time
5497 // abstime will be the absolute timeout time
5498 if (millis < 0) millis = 0;
5499 struct timeval now;
5500 int status = gettimeofday(&now, NULL);
5501 assert(status == 0, "gettimeofday");
5502 jlong seconds = millis / 1000;
5503 jlong max_wait_period;
5505 if (UseLWPSynchronization) {
5506 // forward port of fix for 4275818 (not sleeping long enough)
5507 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5508 // _lwp_cond_timedwait() used a round_down algorithm rather
5509 // than a round_up. For millis less than our roundfactor
5510 // it rounded down to 0 which doesn't meet the spec.
5511 // For millis > roundfactor we may return a bit sooner, but
5512 // since we can not accurately identify the patch level and
5513 // this has already been fixed in Solaris 9 and 8 we will
5514 // leave it alone rather than always rounding down.
5516 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5517 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5518 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5519 max_wait_period = 21000000;
5520 } else {
5521 max_wait_period = 50000000;
5522 }
5523 millis %= 1000;
5524 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5525 seconds = max_wait_period;
5526 }
5527 abstime->tv_sec = now.tv_sec + seconds;
5528 long usec = now.tv_usec + millis * 1000;
5529 if (usec >= 1000000) {
5530 abstime->tv_sec += 1;
5531 usec -= 1000000;
5532 }
5533 abstime->tv_nsec = usec * 1000;
5534 return abstime;
5535 }
5537 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
5538 // Conceptually TryPark() should be equivalent to park(0).
5540 int os::PlatformEvent::TryPark() {
5541 for (;;) {
5542 const int v = _Event ;
5543 guarantee ((v == 0) || (v == 1), "invariant") ;
5544 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
5545 }
5546 }
5548 void os::PlatformEvent::park() { // AKA: down()
5549 // Invariant: Only the thread associated with the Event/PlatformEvent
5550 // may call park().
5551 int v ;
5552 for (;;) {
5553 v = _Event ;
5554 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5555 }
5556 guarantee (v >= 0, "invariant") ;
5557 if (v == 0) {
5558 // Do this the hard way by blocking ...
5559 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5560 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5561 // Only for SPARC >= V8PlusA
5562 #if defined(__sparc) && defined(COMPILER2)
5563 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5564 #endif
5565 int status = os::Solaris::mutex_lock(_mutex);
5566 assert_status(status == 0, status, "mutex_lock");
5567 guarantee (_nParked == 0, "invariant") ;
5568 ++ _nParked ;
5569 while (_Event < 0) {
5570 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5571 // Treat this the same as if the wait was interrupted
5572 // With usr/lib/lwp going to kernel, always handle ETIME
5573 status = os::Solaris::cond_wait(_cond, _mutex);
5574 if (status == ETIME) status = EINTR ;
5575 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5576 }
5577 -- _nParked ;
5578 _Event = 0 ;
5579 status = os::Solaris::mutex_unlock(_mutex);
5580 assert_status(status == 0, status, "mutex_unlock");
5581 }
5582 }
5584 int os::PlatformEvent::park(jlong millis) {
5585 guarantee (_nParked == 0, "invariant") ;
5586 int v ;
5587 for (;;) {
5588 v = _Event ;
5589 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5590 }
5591 guarantee (v >= 0, "invariant") ;
5592 if (v != 0) return OS_OK ;
5594 int ret = OS_TIMEOUT;
5595 timestruc_t abst;
5596 compute_abstime (&abst, millis);
5598 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5599 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5600 // Only for SPARC >= V8PlusA
5601 #if defined(__sparc) && defined(COMPILER2)
5602 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5603 #endif
5604 int status = os::Solaris::mutex_lock(_mutex);
5605 assert_status(status == 0, status, "mutex_lock");
5606 guarantee (_nParked == 0, "invariant") ;
5607 ++ _nParked ;
5608 while (_Event < 0) {
5609 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5610 assert_status(status == 0 || status == EINTR ||
5611 status == ETIME || status == ETIMEDOUT,
5612 status, "cond_timedwait");
5613 if (!FilterSpuriousWakeups) break ; // previous semantics
5614 if (status == ETIME || status == ETIMEDOUT) break ;
5615 // We consume and ignore EINTR and spurious wakeups.
5616 }
5617 -- _nParked ;
5618 if (_Event >= 0) ret = OS_OK ;
5619 _Event = 0 ;
5620 status = os::Solaris::mutex_unlock(_mutex);
5621 assert_status(status == 0, status, "mutex_unlock");
5622 return ret;
5623 }
5625 void os::PlatformEvent::unpark() {
5626 int v, AnyWaiters;
5628 // Increment _Event.
5629 // Another acceptable implementation would be to simply swap 1
5630 // into _Event:
5631 // if (Swap (&_Event, 1) < 0) {
5632 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ;
5633 // if (AnyWaiters) cond_signal (_cond) ;
5634 // }
5636 for (;;) {
5637 v = _Event ;
5638 if (v > 0) {
5639 // The LD of _Event could have reordered or be satisfied
5640 // by a read-aside from this processor's write buffer.
5641 // To avoid problems execute a barrier and then
5642 // ratify the value. A degenerate CAS() would also work.
5643 // Viz., CAS (v+0, &_Event, v) == v).
5644 OrderAccess::fence() ;
5645 if (_Event == v) return ;
5646 continue ;
5647 }
5648 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
5649 }
5651 // If the thread associated with the event was parked, wake it.
5652 if (v < 0) {
5653 int status ;
5654 // Wait for the thread assoc with the PlatformEvent to vacate.
5655 status = os::Solaris::mutex_lock(_mutex);
5656 assert_status(status == 0, status, "mutex_lock");
5657 AnyWaiters = _nParked ;
5658 status = os::Solaris::mutex_unlock(_mutex);
5659 assert_status(status == 0, status, "mutex_unlock");
5660 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ;
5661 if (AnyWaiters != 0) {
5662 // We intentional signal *after* dropping the lock
5663 // to avoid a common class of futile wakeups.
5664 status = os::Solaris::cond_signal(_cond);
5665 assert_status(status == 0, status, "cond_signal");
5666 }
5667 }
5668 }
5670 // JSR166
5671 // -------------------------------------------------------
5673 /*
5674 * The solaris and linux implementations of park/unpark are fairly
5675 * conservative for now, but can be improved. They currently use a
5676 * mutex/condvar pair, plus _counter.
5677 * Park decrements _counter if > 0, else does a condvar wait. Unpark
5678 * sets count to 1 and signals condvar. Only one thread ever waits
5679 * on the condvar. Contention seen when trying to park implies that someone
5680 * is unparking you, so don't wait. And spurious returns are fine, so there
5681 * is no need to track notifications.
5682 */
5684 #define NANOSECS_PER_SEC 1000000000
5685 #define NANOSECS_PER_MILLISEC 1000000
5686 #define MAX_SECS 100000000
5688 /*
5689 * This code is common to linux and solaris and will be moved to a
5690 * common place in dolphin.
5691 *
5692 * The passed in time value is either a relative time in nanoseconds
5693 * or an absolute time in milliseconds. Either way it has to be unpacked
5694 * into suitable seconds and nanoseconds components and stored in the
5695 * given timespec structure.
5696 * Given time is a 64-bit value and the time_t used in the timespec is only
5697 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
5698 * overflow if times way in the future are given. Further on Solaris versions
5699 * prior to 10 there is a restriction (see cond_timedwait) that the specified
5700 * number of seconds, in abstime, is less than current_time + 100,000,000.
5701 * As it will be 28 years before "now + 100000000" will overflow we can
5702 * ignore overflow and just impose a hard-limit on seconds using the value
5703 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
5704 * years from "now".
5705 */
5706 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5707 assert (time > 0, "convertTime");
5709 struct timeval now;
5710 int status = gettimeofday(&now, NULL);
5711 assert(status == 0, "gettimeofday");
5713 time_t max_secs = now.tv_sec + MAX_SECS;
5715 if (isAbsolute) {
5716 jlong secs = time / 1000;
5717 if (secs > max_secs) {
5718 absTime->tv_sec = max_secs;
5719 }
5720 else {
5721 absTime->tv_sec = secs;
5722 }
5723 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5724 }
5725 else {
5726 jlong secs = time / NANOSECS_PER_SEC;
5727 if (secs >= MAX_SECS) {
5728 absTime->tv_sec = max_secs;
5729 absTime->tv_nsec = 0;
5730 }
5731 else {
5732 absTime->tv_sec = now.tv_sec + secs;
5733 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5734 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5735 absTime->tv_nsec -= NANOSECS_PER_SEC;
5736 ++absTime->tv_sec; // note: this must be <= max_secs
5737 }
5738 }
5739 }
5740 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5741 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5742 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5743 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5744 }
5746 void Parker::park(bool isAbsolute, jlong time) {
5748 // Optional fast-path check:
5749 // Return immediately if a permit is available.
5750 if (_counter > 0) {
5751 _counter = 0 ;
5752 return ;
5753 }
5755 // Optional fast-exit: Check interrupt before trying to wait
5756 Thread* thread = Thread::current();
5757 assert(thread->is_Java_thread(), "Must be JavaThread");
5758 JavaThread *jt = (JavaThread *)thread;
5759 if (Thread::is_interrupted(thread, false)) {
5760 return;
5761 }
5763 // First, demultiplex/decode time arguments
5764 timespec absTime;
5765 if (time < 0) { // don't wait at all
5766 return;
5767 }
5768 if (time > 0) {
5769 // Warning: this code might be exposed to the old Solaris time
5770 // round-down bugs. Grep "roundingFix" for details.
5771 unpackTime(&absTime, isAbsolute, time);
5772 }
5774 // Enter safepoint region
5775 // Beware of deadlocks such as 6317397.
5776 // The per-thread Parker:: _mutex is a classic leaf-lock.
5777 // In particular a thread must never block on the Threads_lock while
5778 // holding the Parker:: mutex. If safepoints are pending both the
5779 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
5780 ThreadBlockInVM tbivm(jt);
5782 // Don't wait if cannot get lock since interference arises from
5783 // unblocking. Also. check interrupt before trying wait
5784 if (Thread::is_interrupted(thread, false) ||
5785 os::Solaris::mutex_trylock(_mutex) != 0) {
5786 return;
5787 }
5789 int status ;
5791 if (_counter > 0) { // no wait needed
5792 _counter = 0;
5793 status = os::Solaris::mutex_unlock(_mutex);
5794 assert (status == 0, "invariant") ;
5795 return;
5796 }
5798 #ifdef ASSERT
5799 // Don't catch signals while blocked; let the running threads have the signals.
5800 // (This allows a debugger to break into the running thread.)
5801 sigset_t oldsigs;
5802 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
5803 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
5804 #endif
5806 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
5807 jt->set_suspend_equivalent();
5808 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
5810 // Do this the hard way by blocking ...
5811 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5812 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5813 // Only for SPARC >= V8PlusA
5814 #if defined(__sparc) && defined(COMPILER2)
5815 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5816 #endif
5818 if (time == 0) {
5819 status = os::Solaris::cond_wait (_cond, _mutex) ;
5820 } else {
5821 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
5822 }
5823 // Note that an untimed cond_wait() can sometimes return ETIME on older
5824 // versions of the Solaris.
5825 assert_status(status == 0 || status == EINTR ||
5826 status == ETIME || status == ETIMEDOUT,
5827 status, "cond_timedwait");
5829 #ifdef ASSERT
5830 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
5831 #endif
5832 _counter = 0 ;
5833 status = os::Solaris::mutex_unlock(_mutex);
5834 assert_status(status == 0, status, "mutex_unlock") ;
5836 // If externally suspended while waiting, re-suspend
5837 if (jt->handle_special_suspend_equivalent_condition()) {
5838 jt->java_suspend_self();
5839 }
5841 }
5843 void Parker::unpark() {
5844 int s, status ;
5845 status = os::Solaris::mutex_lock (_mutex) ;
5846 assert (status == 0, "invariant") ;
5847 s = _counter;
5848 _counter = 1;
5849 status = os::Solaris::mutex_unlock (_mutex) ;
5850 assert (status == 0, "invariant") ;
5852 if (s < 1) {
5853 status = os::Solaris::cond_signal (_cond) ;
5854 assert (status == 0, "invariant") ;
5855 }
5856 }
5858 extern char** environ;
5860 // Run the specified command in a separate process. Return its exit value,
5861 // or -1 on failure (e.g. can't fork a new process).
5862 // Unlike system(), this function can be called from signal handler. It
5863 // doesn't block SIGINT et al.
5864 int os::fork_and_exec(char* cmd) {
5865 char * argv[4];
5866 argv[0] = (char *)"sh";
5867 argv[1] = (char *)"-c";
5868 argv[2] = cmd;
5869 argv[3] = NULL;
5871 // fork is async-safe, fork1 is not so can't use in signal handler
5872 pid_t pid;
5873 Thread* t = ThreadLocalStorage::get_thread_slow();
5874 if (t != NULL && t->is_inside_signal_handler()) {
5875 pid = fork();
5876 } else {
5877 pid = fork1();
5878 }
5880 if (pid < 0) {
5881 // fork failed
5882 warning("fork failed: %s", strerror(errno));
5883 return -1;
5885 } else if (pid == 0) {
5886 // child process
5888 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
5889 execve("/usr/bin/sh", argv, environ);
5891 // execve failed
5892 _exit(-1);
5894 } else {
5895 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5896 // care about the actual exit code, for now.
5898 int status;
5900 // Wait for the child process to exit. This returns immediately if
5901 // the child has already exited. */
5902 while (waitpid(pid, &status, 0) < 0) {
5903 switch (errno) {
5904 case ECHILD: return 0;
5905 case EINTR: break;
5906 default: return -1;
5907 }
5908 }
5910 if (WIFEXITED(status)) {
5911 // The child exited normally; get its exit code.
5912 return WEXITSTATUS(status);
5913 } else if (WIFSIGNALED(status)) {
5914 // The child exited because of a signal
5915 // The best value to return is 0x80 + signal number,
5916 // because that is what all Unix shells do, and because
5917 // it allows callers to distinguish between process exit and
5918 // process death by signal.
5919 return 0x80 + WTERMSIG(status);
5920 } else {
5921 // Unknown exit code; pass it through
5922 return status;
5923 }
5924 }
5925 }