1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // no precompiled headers
26 #include "classfile/classLoader.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/icBuffer.hpp"
30 #include "code/vtableStubs.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvm_solaris.h"
35 #include "memory/allocation.inline.hpp"
36 #include "memory/filemap.hpp"
37 #include "mutex_solaris.inline.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "os_share_solaris.hpp"
40 #include "prims/jniFastGetField.hpp"
41 #include "prims/jvm.h"
42 #include "prims/jvm_misc.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/extendedPC.hpp"
45 #include "runtime/globals.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/mutexLocker.hpp"
50 #include "runtime/objectMonitor.hpp"
51 #include "runtime/osThread.hpp"
52 #include "runtime/perfMemory.hpp"
53 #include "runtime/sharedRuntime.hpp"
54 #include "runtime/statSampler.hpp"
55 #include "runtime/stubRoutines.hpp"
56 #include "runtime/thread.inline.hpp"
57 #include "runtime/threadCritical.hpp"
58 #include "runtime/timer.hpp"
59 #include "services/attachListener.hpp"
60 #include "services/memTracker.hpp"
61 #include "services/runtimeService.hpp"
62 #include "utilities/decoder.hpp"
63 #include "utilities/defaultStream.hpp"
64 #include "utilities/events.hpp"
65 #include "utilities/growableArray.hpp"
66 #include "utilities/vmError.hpp"
67
68 // put OS-includes here
69 # include <dlfcn.h>
70 # include <errno.h>
71 # include <exception>
72 # include <link.h>
73 # include <poll.h>
74 # include <pthread.h>
75 # include <pwd.h>
76 # include <schedctl.h>
77 # include <setjmp.h>
78 # include <signal.h>
79 # include <stdio.h>
80 # include <alloca.h>
81 # include <sys/filio.h>
82 # include <sys/ipc.h>
83 # include <sys/lwp.h>
84 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
85 # include <sys/mman.h>
86 # include <sys/processor.h>
87 # include <sys/procset.h>
88 # include <sys/pset.h>
89 # include <sys/resource.h>
90 # include <sys/shm.h>
91 # include <sys/socket.h>
92 # include <sys/stat.h>
93 # include <sys/systeminfo.h>
94 # include <sys/time.h>
95 # include <sys/times.h>
96 # include <sys/types.h>
97 # include <sys/wait.h>
98 # include <sys/utsname.h>
99 # include <thread.h>
100 # include <unistd.h>
101 # include <sys/priocntl.h>
102 # include <sys/rtpriocntl.h>
103 # include <sys/tspriocntl.h>
104 # include <sys/iapriocntl.h>
105 # include <sys/fxpriocntl.h>
106 # include <sys/loadavg.h>
107 # include <string.h>
108 # include <stdio.h>
109
110 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
111 # include <sys/procfs.h> // see comment in <sys/procfs.h>
112
113 #define MAX_PATH (2 * K)
114
115 // for timer info max values which include all bits
116 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
117
118 #ifdef _GNU_SOURCE
119 // See bug #6514594
120 extern "C" int madvise(caddr_t, size_t, int);
121 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg,
122 int attr, int mask);
123 #endif //_GNU_SOURCE
124
125 /*
126 MPSS Changes Start.
127 The JVM binary needs to be built and run on pre-Solaris 9
128 systems, but the constants needed by MPSS are only in Solaris 9
129 header files. They are textually replicated here to allow
130 building on earlier systems. Once building on Solaris 8 is
131 no longer a requirement, these #defines can be replaced by ordinary
132 system .h inclusion.
133
134 In earlier versions of the JDK and Solaris, we used ISM for large pages.
135 But ISM requires shared memory to achieve this and thus has many caveats.
136 MPSS is a fully transparent and is a cleaner way to get large pages.
137 Although we still require keeping ISM for backward compatiblitiy as well as
138 giving the opportunity to use large pages on older systems it is
139 recommended that MPSS be used for Solaris 9 and above.
140
141 */
142
143 #ifndef MC_HAT_ADVISE
144
145 struct memcntl_mha {
146 uint_t mha_cmd; /* command(s) */
147 uint_t mha_flags;
148 size_t mha_pagesize;
149 };
150 #define MC_HAT_ADVISE 7 /* advise hat map size */
151 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */
152 #define MAP_ALIGN 0x200 /* addr specifies alignment */
153
154 #endif
155 // MPSS Changes End.
156
157
158 // Here are some liblgrp types from sys/lgrp_user.h to be able to
159 // compile on older systems without this header file.
160
161 #ifndef MADV_ACCESS_LWP
162 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
163 #endif
164 #ifndef MADV_ACCESS_MANY
165 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */
166 #endif
167
168 #ifndef LGRP_RSRC_CPU
169 # define LGRP_RSRC_CPU 0 /* CPU resources */
170 #endif
171 #ifndef LGRP_RSRC_MEM
172 # define LGRP_RSRC_MEM 1 /* memory resources */
173 #endif
174
175 // Some more macros from sys/mman.h that are not present in Solaris 8.
176
177 #ifndef MAX_MEMINFO_CNT
178 /*
179 * info_req request type definitions for meminfo
180 * request types starting with MEMINFO_V are used for Virtual addresses
181 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical
182 * addresses
183 */
184 # define MEMINFO_SHIFT 16
185 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT)
186 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */
187 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */
188 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */
189 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */
190 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */
191 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */
192 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */
193
194 /* maximum number of addresses meminfo() can process at a time */
195 # define MAX_MEMINFO_CNT 256
196
197 /* maximum number of request types */
198 # define MAX_MEMINFO_REQ 31
199 #endif
200
201 // see thr_setprio(3T) for the basis of these numbers
202 #define MinimumPriority 0
203 #define NormalPriority 64
204 #define MaximumPriority 127
205
206 // Values for ThreadPriorityPolicy == 1
207 int prio_policy1[CriticalPriority+1] = {
208 -99999, 0, 16, 32, 48, 64,
209 80, 96, 112, 124, 127, 127 };
210
211 // System parameters used internally
212 static clock_t clock_tics_per_sec = 100;
213
214 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
215 static bool enabled_extended_FILE_stdio = false;
216
217 // For diagnostics to print a message once. see run_periodic_checks
218 static bool check_addr0_done = false;
219 static sigset_t check_signal_done;
220 static bool check_signals = true;
221
222 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
223 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
224
225 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
226
227
228 // "default" initializers for missing libc APIs
229 extern "C" {
230 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
231 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
232
233 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
234 static int lwp_cond_destroy(cond_t *cv) { return 0; }
235 }
236
237 // "default" initializers for pthread-based synchronization
238 extern "C" {
239 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
240 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
241 }
242
243 // Thread Local Storage
244 // This is common to all Solaris platforms so it is defined here,
245 // in this common file.
246 // The declarations are in the os_cpu threadLS*.hpp files.
247 //
248 // Static member initialization for TLS
249 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
250
251 #ifndef PRODUCT
252 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
253
254 int ThreadLocalStorage::_tcacheHit = 0;
255 int ThreadLocalStorage::_tcacheMiss = 0;
256
257 void ThreadLocalStorage::print_statistics() {
258 int total = _tcacheMiss+_tcacheHit;
259 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
260 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
261 }
262 #undef _PCT
263 #endif // PRODUCT
264
265 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
266 int index) {
267 Thread *thread = get_thread_slow();
268 if (thread != NULL) {
269 address sp = os::current_stack_pointer();
270 guarantee(thread->_stack_base == NULL ||
271 (sp <= thread->_stack_base &&
272 sp >= thread->_stack_base - thread->_stack_size) ||
273 is_error_reported(),
274 "sp must be inside of selected thread stack");
275
276 thread->set_self_raw_id(raw_id); // mark for quick retrieval
277 _get_thread_cache[ index ] = thread;
278 }
279 return thread;
280 }
281
282
283 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0};
284 #define NO_CACHED_THREAD ((Thread*)all_zero)
285
286 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
287
288 // Store the new value before updating the cache to prevent a race
289 // between get_thread_via_cache_slowly() and this store operation.
290 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
291
292 // Update thread cache with new thread if setting on thread create,
293 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
294 uintptr_t raw = pd_raw_thread_id();
295 int ix = pd_cache_index(raw);
296 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
297 }
298
299 void ThreadLocalStorage::pd_init() {
300 for (int i = 0; i < _pd_cache_size; i++) {
301 _get_thread_cache[i] = NO_CACHED_THREAD;
302 }
303 }
304
305 // Invalidate all the caches (happens to be the same as pd_init).
306 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
307
308 #undef NO_CACHED_THREAD
309
310 // END Thread Local Storage
311
312 static inline size_t adjust_stack_size(address base, size_t size) {
313 if ((ssize_t)size < 0) {
314 // 4759953: Compensate for ridiculous stack size.
315 size = max_intx;
316 }
317 if (size > (size_t)base) {
318 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
319 size = (size_t)base;
320 }
321 return size;
322 }
323
324 static inline stack_t get_stack_info() {
325 stack_t st;
326 int retval = thr_stksegment(&st);
327 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
328 assert(retval == 0, "incorrect return value from thr_stksegment");
329 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
330 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
331 return st;
332 }
333
334 address os::current_stack_base() {
335 int r = thr_main() ;
336 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
337 bool is_primordial_thread = r;
338
339 // Workaround 4352906, avoid calls to thr_stksegment by
340 // thr_main after the first one (it looks like we trash
341 // some data, causing the value for ss_sp to be incorrect).
342 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
343 stack_t st = get_stack_info();
344 if (is_primordial_thread) {
345 // cache initial value of stack base
346 os::Solaris::_main_stack_base = (address)st.ss_sp;
347 }
348 return (address)st.ss_sp;
349 } else {
350 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
351 return os::Solaris::_main_stack_base;
352 }
353 }
354
355 size_t os::current_stack_size() {
356 size_t size;
357
358 int r = thr_main() ;
359 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
360 if(!r) {
361 size = get_stack_info().ss_size;
362 } else {
363 struct rlimit limits;
364 getrlimit(RLIMIT_STACK, &limits);
365 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
366 }
367 // base may not be page aligned
368 address base = current_stack_base();
369 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
370 return (size_t)(base - bottom);
371 }
372
373 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
374 return localtime_r(clock, res);
375 }
376
377 // interruptible infrastructure
378
379 // setup_interruptible saves the thread state before going into an
380 // interruptible system call.
381 // The saved state is used to restore the thread to
382 // its former state whether or not an interrupt is received.
383 // Used by classloader os::read
384 // os::restartable_read calls skip this layer and stay in _thread_in_native
385
386 void os::Solaris::setup_interruptible(JavaThread* thread) {
387
388 JavaThreadState thread_state = thread->thread_state();
389
390 assert(thread_state != _thread_blocked, "Coming from the wrong thread");
391 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible");
392 OSThread* osthread = thread->osthread();
393 osthread->set_saved_interrupt_thread_state(thread_state);
394 thread->frame_anchor()->make_walkable(thread);
395 ThreadStateTransition::transition(thread, thread_state, _thread_blocked);
396 }
397
398 // Version of setup_interruptible() for threads that are already in
399 // _thread_blocked. Used by os_sleep().
400 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) {
401 thread->frame_anchor()->make_walkable(thread);
402 }
403
404 JavaThread* os::Solaris::setup_interruptible() {
405 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
406 setup_interruptible(thread);
407 return thread;
408 }
409
410 void os::Solaris::try_enable_extended_io() {
411 typedef int (*enable_extended_FILE_stdio_t)(int, int);
412
413 if (!UseExtendedFileIO) {
414 return;
415 }
416
417 enable_extended_FILE_stdio_t enabler =
418 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
419 "enable_extended_FILE_stdio");
420 if (enabler) {
421 enabler(-1, -1);
422 }
423 }
424
425
426 #ifdef ASSERT
427
428 JavaThread* os::Solaris::setup_interruptible_native() {
429 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
430 JavaThreadState thread_state = thread->thread_state();
431 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
432 return thread;
433 }
434
435 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) {
436 JavaThreadState thread_state = thread->thread_state();
437 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
438 }
439 #endif
440
441 // cleanup_interruptible reverses the effects of setup_interruptible
442 // setup_interruptible_already_blocked() does not need any cleanup.
443
444 void os::Solaris::cleanup_interruptible(JavaThread* thread) {
445 OSThread* osthread = thread->osthread();
446
447 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state());
448 }
449
450 // I/O interruption related counters called in _INTERRUPTIBLE
451
452 void os::Solaris::bump_interrupted_before_count() {
453 RuntimeService::record_interrupted_before_count();
454 }
455
456 void os::Solaris::bump_interrupted_during_count() {
457 RuntimeService::record_interrupted_during_count();
458 }
459
460 static int _processors_online = 0;
461
462 jint os::Solaris::_os_thread_limit = 0;
463 volatile jint os::Solaris::_os_thread_count = 0;
464
465 julong os::available_memory() {
466 return Solaris::available_memory();
467 }
468
469 julong os::Solaris::available_memory() {
470 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
471 }
472
473 julong os::Solaris::_physical_memory = 0;
474
475 julong os::physical_memory() {
476 return Solaris::physical_memory();
477 }
478
479 julong os::allocatable_physical_memory(julong size) {
480 #ifdef _LP64
481 return size;
482 #else
483 julong result = MIN2(size, (julong)3835*M);
484 if (!is_allocatable(result)) {
485 // Memory allocations will be aligned but the alignment
486 // is not known at this point. Alignments will
487 // be at most to LargePageSizeInBytes. Protect
488 // allocations from alignments up to illegal
489 // values. If at this point 2G is illegal.
490 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes;
491 result = MIN2(size, reasonable_size);
492 }
493 return result;
494 #endif
495 }
496
497 static hrtime_t first_hrtime = 0;
498 static const hrtime_t hrtime_hz = 1000*1000*1000;
499 const int LOCK_BUSY = 1;
500 const int LOCK_FREE = 0;
501 const int LOCK_INVALID = -1;
502 static volatile hrtime_t max_hrtime = 0;
503 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress
504
505
506 void os::Solaris::initialize_system_info() {
507 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
508 _processors_online = sysconf (_SC_NPROCESSORS_ONLN);
509 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
510 }
511
512 int os::active_processor_count() {
513 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
514 pid_t pid = getpid();
515 psetid_t pset = PS_NONE;
516 // Are we running in a processor set or is there any processor set around?
517 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
518 uint_t pset_cpus;
519 // Query the number of cpus available to us.
520 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
521 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
522 _processors_online = pset_cpus;
523 return pset_cpus;
524 }
525 }
526 // Otherwise return number of online cpus
527 return online_cpus;
528 }
529
530 static bool find_processors_in_pset(psetid_t pset,
531 processorid_t** id_array,
532 uint_t* id_length) {
533 bool result = false;
534 // Find the number of processors in the processor set.
535 if (pset_info(pset, NULL, id_length, NULL) == 0) {
536 // Make up an array to hold their ids.
537 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
538 // Fill in the array with their processor ids.
539 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
540 result = true;
541 }
542 }
543 return result;
544 }
545
546 // Callers of find_processors_online() must tolerate imprecise results --
547 // the system configuration can change asynchronously because of DR
548 // or explicit psradm operations.
549 //
550 // We also need to take care that the loop (below) terminates as the
551 // number of processors online can change between the _SC_NPROCESSORS_ONLN
552 // request and the loop that builds the list of processor ids. Unfortunately
553 // there's no reliable way to determine the maximum valid processor id,
554 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
555 // man pages, which claim the processor id set is "sparse, but
556 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
557 // exit the loop.
558 //
559 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
560 // not available on S8.0.
561
562 static bool find_processors_online(processorid_t** id_array,
563 uint* id_length) {
564 const processorid_t MAX_PROCESSOR_ID = 100000 ;
565 // Find the number of processors online.
566 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
567 // Make up an array to hold their ids.
568 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
569 // Processors need not be numbered consecutively.
570 long found = 0;
571 processorid_t next = 0;
572 while (found < *id_length && next < MAX_PROCESSOR_ID) {
573 processor_info_t info;
574 if (processor_info(next, &info) == 0) {
575 // NB, PI_NOINTR processors are effectively online ...
576 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
577 (*id_array)[found] = next;
578 found += 1;
579 }
580 }
581 next += 1;
582 }
583 if (found < *id_length) {
584 // The loop above didn't identify the expected number of processors.
585 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
586 // and re-running the loop, above, but there's no guarantee of progress
587 // if the system configuration is in flux. Instead, we just return what
588 // we've got. Note that in the worst case find_processors_online() could
589 // return an empty set. (As a fall-back in the case of the empty set we
590 // could just return the ID of the current processor).
591 *id_length = found ;
592 }
593
594 return true;
595 }
596
597 static bool assign_distribution(processorid_t* id_array,
598 uint id_length,
599 uint* distribution,
600 uint distribution_length) {
601 // We assume we can assign processorid_t's to uint's.
602 assert(sizeof(processorid_t) == sizeof(uint),
603 "can't convert processorid_t to uint");
604 // Quick check to see if we won't succeed.
605 if (id_length < distribution_length) {
606 return false;
607 }
608 // Assign processor ids to the distribution.
609 // Try to shuffle processors to distribute work across boards,
610 // assuming 4 processors per board.
611 const uint processors_per_board = ProcessDistributionStride;
612 // Find the maximum processor id.
613 processorid_t max_id = 0;
614 for (uint m = 0; m < id_length; m += 1) {
615 max_id = MAX2(max_id, id_array[m]);
616 }
617 // The next id, to limit loops.
618 const processorid_t limit_id = max_id + 1;
619 // Make up markers for available processors.
620 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
621 for (uint c = 0; c < limit_id; c += 1) {
622 available_id[c] = false;
623 }
624 for (uint a = 0; a < id_length; a += 1) {
625 available_id[id_array[a]] = true;
626 }
627 // Step by "boards", then by "slot", copying to "assigned".
628 // NEEDS_CLEANUP: The assignment of processors should be stateful,
629 // remembering which processors have been assigned by
630 // previous calls, etc., so as to distribute several
631 // independent calls of this method. What we'd like is
632 // It would be nice to have an API that let us ask
633 // how many processes are bound to a processor,
634 // but we don't have that, either.
635 // In the short term, "board" is static so that
636 // subsequent distributions don't all start at board 0.
637 static uint board = 0;
638 uint assigned = 0;
639 // Until we've found enough processors ....
640 while (assigned < distribution_length) {
641 // ... find the next available processor in the board.
642 for (uint slot = 0; slot < processors_per_board; slot += 1) {
643 uint try_id = board * processors_per_board + slot;
644 if ((try_id < limit_id) && (available_id[try_id] == true)) {
645 distribution[assigned] = try_id;
646 available_id[try_id] = false;
647 assigned += 1;
648 break;
649 }
650 }
651 board += 1;
652 if (board * processors_per_board + 0 >= limit_id) {
653 board = 0;
654 }
655 }
656 if (available_id != NULL) {
657 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal);
658 }
659 return true;
660 }
661
662 void os::set_native_thread_name(const char *name) {
663 // Not yet implemented.
664 return;
665 }
666
667 bool os::distribute_processes(uint length, uint* distribution) {
668 bool result = false;
669 // Find the processor id's of all the available CPUs.
670 processorid_t* id_array = NULL;
671 uint id_length = 0;
672 // There are some races between querying information and using it,
673 // since processor sets can change dynamically.
674 psetid_t pset = PS_NONE;
675 // Are we running in a processor set?
676 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
677 result = find_processors_in_pset(pset, &id_array, &id_length);
678 } else {
679 result = find_processors_online(&id_array, &id_length);
680 }
681 if (result == true) {
682 if (id_length >= length) {
683 result = assign_distribution(id_array, id_length, distribution, length);
684 } else {
685 result = false;
686 }
687 }
688 if (id_array != NULL) {
689 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal);
690 }
691 return result;
692 }
693
694 bool os::bind_to_processor(uint processor_id) {
695 // We assume that a processorid_t can be stored in a uint.
696 assert(sizeof(uint) == sizeof(processorid_t),
697 "can't convert uint to processorid_t");
698 int bind_result =
699 processor_bind(P_LWPID, // bind LWP.
700 P_MYID, // bind current LWP.
701 (processorid_t) processor_id, // id.
702 NULL); // don't return old binding.
703 return (bind_result == 0);
704 }
705
706 bool os::getenv(const char* name, char* buffer, int len) {
707 char* val = ::getenv( name );
708 if ( val == NULL
709 || strlen(val) + 1 > len ) {
710 if (len > 0) buffer[0] = 0; // return a null string
711 return false;
712 }
713 strcpy( buffer, val );
714 return true;
715 }
716
717
718 // Return true if user is running as root.
719
720 bool os::have_special_privileges() {
721 static bool init = false;
722 static bool privileges = false;
723 if (!init) {
724 privileges = (getuid() != geteuid()) || (getgid() != getegid());
725 init = true;
726 }
727 return privileges;
728 }
729
730
731 void os::init_system_properties_values() {
732 char arch[12];
733 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch));
734
735 // The next steps are taken in the product version:
736 //
737 // Obtain the JAVA_HOME value from the location of libjvm.so.
738 // This library should be located at:
739 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so.
740 //
741 // If "/jre/lib/" appears at the right place in the path, then we
742 // assume libjvm.so is installed in a JDK and we use this path.
743 //
744 // Otherwise exit with message: "Could not create the Java virtual machine."
745 //
746 // The following extra steps are taken in the debugging version:
747 //
748 // If "/jre/lib/" does NOT appear at the right place in the path
749 // instead of exit check for $JAVA_HOME environment variable.
750 //
751 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
752 // then we append a fake suffix "hotspot/libjvm.so" to this path so
753 // it looks like libjvm.so is installed there
754 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so.
755 //
756 // Otherwise exit.
757 //
758 // Important note: if the location of libjvm.so changes this
759 // code needs to be changed accordingly.
760
761 // The next few definitions allow the code to be verbatim:
762 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal)
763 #define free(p) FREE_C_HEAP_ARRAY(char, p, mtInternal)
764 #define getenv(n) ::getenv(n)
765
766 #define EXTENSIONS_DIR "/lib/ext"
767 #define ENDORSED_DIR "/lib/endorsed"
768 #define COMMON_DIR "/usr/jdk/packages"
769
770 {
771 /* sysclasspath, java_home, dll_dir */
772 {
773 char *home_path;
774 char *dll_path;
775 char *pslash;
776 char buf[MAXPATHLEN];
777 os::jvm_path(buf, sizeof(buf));
778
779 // Found the full path to libjvm.so.
780 // Now cut the path to <java_home>/jre if we can.
781 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */
782 pslash = strrchr(buf, '/');
783 if (pslash != NULL)
784 *pslash = '\0'; /* get rid of /{client|server|hotspot} */
785 dll_path = malloc(strlen(buf) + 1);
786 if (dll_path == NULL)
787 return;
788 strcpy(dll_path, buf);
789 Arguments::set_dll_dir(dll_path);
790
791 if (pslash != NULL) {
792 pslash = strrchr(buf, '/');
793 if (pslash != NULL) {
794 *pslash = '\0'; /* get rid of /<arch> */
795 pslash = strrchr(buf, '/');
796 if (pslash != NULL)
797 *pslash = '\0'; /* get rid of /lib */
798 }
799 }
800
801 home_path = malloc(strlen(buf) + 1);
802 if (home_path == NULL)
803 return;
804 strcpy(home_path, buf);
805 Arguments::set_java_home(home_path);
806
807 if (!set_boot_path('/', ':'))
808 return;
809 }
810
811 /*
812 * Where to look for native libraries
813 */
814 {
815 // Use dlinfo() to determine the correct java.library.path.
816 //
817 // If we're launched by the Java launcher, and the user
818 // does not set java.library.path explicitly on the commandline,
819 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
820 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
821 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
822 // /usr/lib), which is exactly what we want.
823 //
824 // If the user does set java.library.path, it completely
825 // overwrites this setting, and always has.
826 //
827 // If we're not launched by the Java launcher, we may
828 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
829 // settings. Again, dlinfo does exactly what we want.
830
831 Dl_serinfo _info, *info = &_info;
832 Dl_serpath *path;
833 char* library_path;
834 char *common_path;
835 int i;
836
837 // determine search path count and required buffer size
838 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
839 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
840 }
841
842 // allocate new buffer and initialize
843 info = (Dl_serinfo*)malloc(_info.dls_size);
844 if (info == NULL) {
845 vm_exit_out_of_memory(_info.dls_size,
846 "init_system_properties_values info");
847 }
848 info->dls_size = _info.dls_size;
849 info->dls_cnt = _info.dls_cnt;
850
851 // obtain search path information
852 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
853 free(info);
854 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
855 }
856
857 path = &info->dls_serpath[0];
858
859 // Note: Due to a legacy implementation, most of the library path
860 // is set in the launcher. This was to accomodate linking restrictions
861 // on legacy Solaris implementations (which are no longer supported).
862 // Eventually, all the library path setting will be done here.
863 //
864 // However, to prevent the proliferation of improperly built native
865 // libraries, the new path component /usr/jdk/packages is added here.
866
867 // Determine the actual CPU architecture.
868 char cpu_arch[12];
869 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
870 #ifdef _LP64
871 // If we are a 64-bit vm, perform the following translations:
872 // sparc -> sparcv9
873 // i386 -> amd64
874 if (strcmp(cpu_arch, "sparc") == 0)
875 strcat(cpu_arch, "v9");
876 else if (strcmp(cpu_arch, "i386") == 0)
877 strcpy(cpu_arch, "amd64");
878 #endif
879
880 // Construct the invariant part of ld_library_path. Note that the
881 // space for the colon and the trailing null are provided by the
882 // nulls included by the sizeof operator.
883 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch);
884 common_path = malloc(bufsize);
885 if (common_path == NULL) {
886 free(info);
887 vm_exit_out_of_memory(bufsize,
888 "init_system_properties_values common_path");
889 }
890 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch);
891
892 // struct size is more than sufficient for the path components obtained
893 // through the dlinfo() call, so only add additional space for the path
894 // components explicitly added here.
895 bufsize = info->dls_size + strlen(common_path);
896 library_path = malloc(bufsize);
897 if (library_path == NULL) {
898 free(info);
899 free(common_path);
900 vm_exit_out_of_memory(bufsize,
901 "init_system_properties_values library_path");
902 }
903 library_path[0] = '\0';
904
905 // Construct the desired Java library path from the linker's library
906 // search path.
907 //
908 // For compatibility, it is optimal that we insert the additional path
909 // components specific to the Java VM after those components specified
910 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
911 // infrastructure.
912 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it
913 strcpy(library_path, common_path);
914 } else {
915 int inserted = 0;
916 for (i = 0; i < info->dls_cnt; i++, path++) {
917 uint_t flags = path->dls_flags & LA_SER_MASK;
918 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
919 strcat(library_path, common_path);
920 strcat(library_path, os::path_separator());
921 inserted = 1;
922 }
923 strcat(library_path, path->dls_name);
924 strcat(library_path, os::path_separator());
925 }
926 // eliminate trailing path separator
927 library_path[strlen(library_path)-1] = '\0';
928 }
929
930 // happens before argument parsing - can't use a trace flag
931 // tty->print_raw("init_system_properties_values: native lib path: ");
932 // tty->print_raw_cr(library_path);
933
934 // callee copies into its own buffer
935 Arguments::set_library_path(library_path);
936
937 free(common_path);
938 free(library_path);
939 free(info);
940 }
941
942 /*
943 * Extensions directories.
944 *
945 * Note that the space for the colon and the trailing null are provided
946 * by the nulls included by the sizeof operator (so actually one byte more
947 * than necessary is allocated).
948 */
949 {
950 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) +
951 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) +
952 sizeof(EXTENSIONS_DIR));
953 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR,
954 Arguments::get_java_home());
955 Arguments::set_ext_dirs(buf);
956 }
957
958 /* Endorsed standards default directory. */
959 {
960 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR));
961 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
962 Arguments::set_endorsed_dirs(buf);
963 }
964 }
965
966 #undef malloc
967 #undef free
968 #undef getenv
969 #undef EXTENSIONS_DIR
970 #undef ENDORSED_DIR
971 #undef COMMON_DIR
972
973 }
974
975 void os::breakpoint() {
976 BREAKPOINT;
977 }
978
979 bool os::obsolete_option(const JavaVMOption *option)
980 {
981 if (!strncmp(option->optionString, "-Xt", 3)) {
982 return true;
983 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
984 return true;
985 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
986 return true;
987 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
988 return true;
989 }
990 return false;
991 }
992
993 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
994 address stackStart = (address)thread->stack_base();
995 address stackEnd = (address)(stackStart - (address)thread->stack_size());
996 if (sp < stackStart && sp >= stackEnd ) return true;
997 return false;
998 }
999
1000 extern "C" void breakpoint() {
1001 // use debugger to set breakpoint here
1002 }
1003
1004 static thread_t main_thread;
1005
1006 // Thread start routine for all new Java threads
1007 extern "C" void* java_start(void* thread_addr) {
1008 // Try to randomize the cache line index of hot stack frames.
1009 // This helps when threads of the same stack traces evict each other's
1010 // cache lines. The threads can be either from the same JVM instance, or
1011 // from different JVM instances. The benefit is especially true for
1012 // processors with hyperthreading technology.
1013 static int counter = 0;
1014 int pid = os::current_process_id();
1015 alloca(((pid ^ counter++) & 7) * 128);
1016
1017 int prio;
1018 Thread* thread = (Thread*)thread_addr;
1019 OSThread* osthr = thread->osthread();
1020
1021 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound
1022 thread->_schedctl = (void *) schedctl_init () ;
1023
1024 if (UseNUMA) {
1025 int lgrp_id = os::numa_get_group_id();
1026 if (lgrp_id != -1) {
1027 thread->set_lgrp_id(lgrp_id);
1028 }
1029 }
1030
1031 // If the creator called set priority before we started,
1032 // we need to call set_native_priority now that we have an lwp.
1033 // We used to get the priority from thr_getprio (we called
1034 // thr_setprio way back in create_thread) and pass it to
1035 // set_native_priority, but Solaris scales the priority
1036 // in java_to_os_priority, so when we read it back here,
1037 // we pass trash to set_native_priority instead of what's
1038 // in java_to_os_priority. So we save the native priority
1039 // in the osThread and recall it here.
1040
1041 if ( osthr->thread_id() != -1 ) {
1042 if ( UseThreadPriorities ) {
1043 int prio = osthr->native_priority();
1044 if (ThreadPriorityVerbose) {
1045 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
1046 INTPTR_FORMAT ", setting priority: %d\n",
1047 osthr->thread_id(), osthr->lwp_id(), prio);
1048 }
1049 os::set_native_priority(thread, prio);
1050 }
1051 } else if (ThreadPriorityVerbose) {
1052 warning("Can't set priority in _start routine, thread id hasn't been set\n");
1053 }
1054
1055 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
1056
1057 // initialize signal mask for this thread
1058 os::Solaris::hotspot_sigmask(thread);
1059
1060 thread->run();
1061
1062 // One less thread is executing
1063 // When the VMThread gets here, the main thread may have already exited
1064 // which frees the CodeHeap containing the Atomic::dec code
1065 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
1066 Atomic::dec(&os::Solaris::_os_thread_count);
1067 }
1068
1069 if (UseDetachedThreads) {
1070 thr_exit(NULL);
1071 ShouldNotReachHere();
1072 }
1073 return NULL;
1074 }
1075
1076 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
1077 // Allocate the OSThread object
1078 OSThread* osthread = new OSThread(NULL, NULL);
1079 if (osthread == NULL) return NULL;
1080
1081 // Store info on the Solaris thread into the OSThread
1082 osthread->set_thread_id(thread_id);
1083 osthread->set_lwp_id(_lwp_self());
1084 thread->_schedctl = (void *) schedctl_init () ;
1085
1086 if (UseNUMA) {
1087 int lgrp_id = os::numa_get_group_id();
1088 if (lgrp_id != -1) {
1089 thread->set_lgrp_id(lgrp_id);
1090 }
1091 }
1092
1093 if ( ThreadPriorityVerbose ) {
1094 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
1095 osthread->thread_id(), osthread->lwp_id() );
1096 }
1097
1098 // Initial thread state is INITIALIZED, not SUSPENDED
1099 osthread->set_state(INITIALIZED);
1100
1101 return osthread;
1102 }
1103
1104 void os::Solaris::hotspot_sigmask(Thread* thread) {
1105
1106 //Save caller's signal mask
1107 sigset_t sigmask;
1108 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
1109 OSThread *osthread = thread->osthread();
1110 osthread->set_caller_sigmask(sigmask);
1111
1112 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
1113 if (!ReduceSignalUsage) {
1114 if (thread->is_VM_thread()) {
1115 // Only the VM thread handles BREAK_SIGNAL ...
1116 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
1117 } else {
1118 // ... all other threads block BREAK_SIGNAL
1119 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
1120 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
1121 }
1122 }
1123 }
1124
1125 bool os::create_attached_thread(JavaThread* thread) {
1126 #ifdef ASSERT
1127 thread->verify_not_published();
1128 #endif
1129 OSThread* osthread = create_os_thread(thread, thr_self());
1130 if (osthread == NULL) {
1131 return false;
1132 }
1133
1134 // Initial thread state is RUNNABLE
1135 osthread->set_state(RUNNABLE);
1136 thread->set_osthread(osthread);
1137
1138 // initialize signal mask for this thread
1139 // and save the caller's signal mask
1140 os::Solaris::hotspot_sigmask(thread);
1141
1142 return true;
1143 }
1144
1145 bool os::create_main_thread(JavaThread* thread) {
1146 #ifdef ASSERT
1147 thread->verify_not_published();
1148 #endif
1149 if (_starting_thread == NULL) {
1150 _starting_thread = create_os_thread(thread, main_thread);
1151 if (_starting_thread == NULL) {
1152 return false;
1153 }
1154 }
1155
1156 // The primodial thread is runnable from the start
1157 _starting_thread->set_state(RUNNABLE);
1158
1159 thread->set_osthread(_starting_thread);
1160
1161 // initialize signal mask for this thread
1162 // and save the caller's signal mask
1163 os::Solaris::hotspot_sigmask(thread);
1164
1165 return true;
1166 }
1167
1168 // _T2_libthread is true if we believe we are running with the newer
1169 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default)
1170 bool os::Solaris::_T2_libthread = false;
1171
1172 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
1173 // Allocate the OSThread object
1174 OSThread* osthread = new OSThread(NULL, NULL);
1175 if (osthread == NULL) {
1176 return false;
1177 }
1178
1179 if ( ThreadPriorityVerbose ) {
1180 char *thrtyp;
1181 switch ( thr_type ) {
1182 case vm_thread:
1183 thrtyp = (char *)"vm";
1184 break;
1185 case cgc_thread:
1186 thrtyp = (char *)"cgc";
1187 break;
1188 case pgc_thread:
1189 thrtyp = (char *)"pgc";
1190 break;
1191 case java_thread:
1192 thrtyp = (char *)"java";
1193 break;
1194 case compiler_thread:
1195 thrtyp = (char *)"compiler";
1196 break;
1197 case watcher_thread:
1198 thrtyp = (char *)"watcher";
1199 break;
1200 default:
1201 thrtyp = (char *)"unknown";
1202 break;
1203 }
1204 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
1205 }
1206
1207 // Calculate stack size if it's not specified by caller.
1208 if (stack_size == 0) {
1209 // The default stack size 1M (2M for LP64).
1210 stack_size = (BytesPerWord >> 2) * K * K;
1211
1212 switch (thr_type) {
1213 case os::java_thread:
1214 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
1215 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
1216 break;
1217 case os::compiler_thread:
1218 if (CompilerThreadStackSize > 0) {
1219 stack_size = (size_t)(CompilerThreadStackSize * K);
1220 break;
1221 } // else fall through:
1222 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1223 case os::vm_thread:
1224 case os::pgc_thread:
1225 case os::cgc_thread:
1226 case os::watcher_thread:
1227 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1228 break;
1229 }
1230 }
1231 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1232
1233 // Initial state is ALLOCATED but not INITIALIZED
1234 osthread->set_state(ALLOCATED);
1235
1236 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1237 // We got lots of threads. Check if we still have some address space left.
1238 // Need to be at least 5Mb of unreserved address space. We do check by
1239 // trying to reserve some.
1240 const size_t VirtualMemoryBangSize = 20*K*K;
1241 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1242 if (mem == NULL) {
1243 delete osthread;
1244 return false;
1245 } else {
1246 // Release the memory again
1247 os::release_memory(mem, VirtualMemoryBangSize);
1248 }
1249 }
1250
1251 // Setup osthread because the child thread may need it.
1252 thread->set_osthread(osthread);
1253
1254 // Create the Solaris thread
1255 // explicit THR_BOUND for T2_libthread case in case
1256 // that assumption is not accurate, but our alternate signal stack
1257 // handling is based on it which must have bound threads
1258 thread_t tid = 0;
1259 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED
1260 | ((UseBoundThreads || os::Solaris::T2_libthread() ||
1261 (thr_type == vm_thread) ||
1262 (thr_type == cgc_thread) ||
1263 (thr_type == pgc_thread) ||
1264 (thr_type == compiler_thread && BackgroundCompilation)) ?
1265 THR_BOUND : 0);
1266 int status;
1267
1268 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs.
1269 //
1270 // On multiprocessors systems, libthread sometimes under-provisions our
1271 // process with LWPs. On a 30-way systems, for instance, we could have
1272 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned
1273 // to our process. This can result in under utilization of PEs.
1274 // I suspect the problem is related to libthread's LWP
1275 // pool management and to the kernel's SIGBLOCKING "last LWP parked"
1276 // upcall policy.
1277 //
1278 // The following code is palliative -- it attempts to ensure that our
1279 // process has sufficient LWPs to take advantage of multiple PEs.
1280 // Proper long-term cures include using user-level threads bound to LWPs
1281 // (THR_BOUND) or using LWP-based synchronization. Note that there is a
1282 // slight timing window with respect to sampling _os_thread_count, but
1283 // the race is benign. Also, we should periodically recompute
1284 // _processors_online as the min of SC_NPROCESSORS_ONLN and the
1285 // the number of PEs in our partition. You might be tempted to use
1286 // THR_NEW_LWP here, but I'd recommend against it as that could
1287 // result in undesirable growth of the libthread's LWP pool.
1288 // The fix below isn't sufficient; for instance, it doesn't take into count
1289 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks.
1290 //
1291 // Some pathologies this scheme doesn't handle:
1292 // * Threads can block, releasing the LWPs. The LWPs can age out.
1293 // When a large number of threads become ready again there aren't
1294 // enough LWPs available to service them. This can occur when the
1295 // number of ready threads oscillates.
1296 // * LWPs/Threads park on IO, thus taking the LWP out of circulation.
1297 //
1298 // Finally, we should call thr_setconcurrency() periodically to refresh
1299 // the LWP pool and thwart the LWP age-out mechanism.
1300 // The "+3" term provides a little slop -- we want to slightly overprovision.
1301
1302 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) {
1303 if (!(flags & THR_BOUND)) {
1304 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation
1305 }
1306 }
1307 // Although this doesn't hurt, we should warn of undefined behavior
1308 // when using unbound T1 threads with schedctl(). This should never
1309 // happen, as the compiler and VM threads are always created bound
1310 DEBUG_ONLY(
1311 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) &&
1312 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) &&
1313 ((thr_type == vm_thread) || (thr_type == cgc_thread) ||
1314 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) {
1315 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound");
1316 }
1317 );
1318
1319
1320 // Mark that we don't have an lwp or thread id yet.
1321 // In case we attempt to set the priority before the thread starts.
1322 osthread->set_lwp_id(-1);
1323 osthread->set_thread_id(-1);
1324
1325 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1326 if (status != 0) {
1327 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1328 perror("os::create_thread");
1329 }
1330 thread->set_osthread(NULL);
1331 // Need to clean up stuff we've allocated so far
1332 delete osthread;
1333 return false;
1334 }
1335
1336 Atomic::inc(&os::Solaris::_os_thread_count);
1337
1338 // Store info on the Solaris thread into the OSThread
1339 osthread->set_thread_id(tid);
1340
1341 // Remember that we created this thread so we can set priority on it
1342 osthread->set_vm_created();
1343
1344 // Set the default thread priority. If using bound threads, setting
1345 // lwp priority will be delayed until thread start.
1346 set_native_priority(thread,
1347 DefaultThreadPriority == -1 ?
1348 java_to_os_priority[NormPriority] :
1349 DefaultThreadPriority);
1350
1351 // Initial thread state is INITIALIZED, not SUSPENDED
1352 osthread->set_state(INITIALIZED);
1353
1354 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1355 return true;
1356 }
1357
1358 /* defined for >= Solaris 10. This allows builds on earlier versions
1359 * of Solaris to take advantage of the newly reserved Solaris JVM signals
1360 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1361 * and -XX:+UseAltSigs does nothing since these should have no conflict
1362 */
1363 #if !defined(SIGJVM1)
1364 #define SIGJVM1 39
1365 #define SIGJVM2 40
1366 #endif
1367
1368 debug_only(static bool signal_sets_initialized = false);
1369 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1370 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1371 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1372
1373 bool os::Solaris::is_sig_ignored(int sig) {
1374 struct sigaction oact;
1375 sigaction(sig, (struct sigaction*)NULL, &oact);
1376 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1377 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1378 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
1379 return true;
1380 else
1381 return false;
1382 }
1383
1384 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1385 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1386 static bool isJVM1available() {
1387 return SIGJVM1 < SIGRTMIN;
1388 }
1389
1390 void os::Solaris::signal_sets_init() {
1391 // Should also have an assertion stating we are still single-threaded.
1392 assert(!signal_sets_initialized, "Already initialized");
1393 // Fill in signals that are necessarily unblocked for all threads in
1394 // the VM. Currently, we unblock the following signals:
1395 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1396 // by -Xrs (=ReduceSignalUsage));
1397 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1398 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1399 // the dispositions or masks wrt these signals.
1400 // Programs embedding the VM that want to use the above signals for their
1401 // own purposes must, at this time, use the "-Xrs" option to prevent
1402 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1403 // (See bug 4345157, and other related bugs).
1404 // In reality, though, unblocking these signals is really a nop, since
1405 // these signals are not blocked by default.
1406 sigemptyset(&unblocked_sigs);
1407 sigemptyset(&allowdebug_blocked_sigs);
1408 sigaddset(&unblocked_sigs, SIGILL);
1409 sigaddset(&unblocked_sigs, SIGSEGV);
1410 sigaddset(&unblocked_sigs, SIGBUS);
1411 sigaddset(&unblocked_sigs, SIGFPE);
1412
1413 if (isJVM1available) {
1414 os::Solaris::set_SIGinterrupt(SIGJVM1);
1415 os::Solaris::set_SIGasync(SIGJVM2);
1416 } else if (UseAltSigs) {
1417 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1418 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1419 } else {
1420 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1421 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1422 }
1423
1424 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1425 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1426
1427 if (!ReduceSignalUsage) {
1428 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1429 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1430 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1431 }
1432 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1433 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1434 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1435 }
1436 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1437 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1438 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1439 }
1440 }
1441 // Fill in signals that are blocked by all but the VM thread.
1442 sigemptyset(&vm_sigs);
1443 if (!ReduceSignalUsage)
1444 sigaddset(&vm_sigs, BREAK_SIGNAL);
1445 debug_only(signal_sets_initialized = true);
1446
1447 // For diagnostics only used in run_periodic_checks
1448 sigemptyset(&check_signal_done);
1449 }
1450
1451 // These are signals that are unblocked while a thread is running Java.
1452 // (For some reason, they get blocked by default.)
1453 sigset_t* os::Solaris::unblocked_signals() {
1454 assert(signal_sets_initialized, "Not initialized");
1455 return &unblocked_sigs;
1456 }
1457
1458 // These are the signals that are blocked while a (non-VM) thread is
1459 // running Java. Only the VM thread handles these signals.
1460 sigset_t* os::Solaris::vm_signals() {
1461 assert(signal_sets_initialized, "Not initialized");
1462 return &vm_sigs;
1463 }
1464
1465 // These are signals that are blocked during cond_wait to allow debugger in
1466 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1467 assert(signal_sets_initialized, "Not initialized");
1468 return &allowdebug_blocked_sigs;
1469 }
1470
1471
1472 void _handle_uncaught_cxx_exception() {
1473 VMError err("An uncaught C++ exception");
1474 err.report_and_die();
1475 }
1476
1477
1478 // First crack at OS-specific initialization, from inside the new thread.
1479 void os::initialize_thread(Thread* thr) {
1480 int r = thr_main() ;
1481 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
1482 if (r) {
1483 JavaThread* jt = (JavaThread *)thr;
1484 assert(jt != NULL,"Sanity check");
1485 size_t stack_size;
1486 address base = jt->stack_base();
1487 if (Arguments::created_by_java_launcher()) {
1488 // Use 2MB to allow for Solaris 7 64 bit mode.
1489 stack_size = JavaThread::stack_size_at_create() == 0
1490 ? 2048*K : JavaThread::stack_size_at_create();
1491
1492 // There are rare cases when we may have already used more than
1493 // the basic stack size allotment before this method is invoked.
1494 // Attempt to allow for a normally sized java_stack.
1495 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1496 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1497 } else {
1498 // 6269555: If we were not created by a Java launcher, i.e. if we are
1499 // running embedded in a native application, treat the primordial thread
1500 // as much like a native attached thread as possible. This means using
1501 // the current stack size from thr_stksegment(), unless it is too large
1502 // to reliably setup guard pages. A reasonable max size is 8MB.
1503 size_t current_size = current_stack_size();
1504 // This should never happen, but just in case....
1505 if (current_size == 0) current_size = 2 * K * K;
1506 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1507 }
1508 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1509 stack_size = (size_t)(base - bottom);
1510
1511 assert(stack_size > 0, "Stack size calculation problem");
1512
1513 if (stack_size > jt->stack_size()) {
1514 NOT_PRODUCT(
1515 struct rlimit limits;
1516 getrlimit(RLIMIT_STACK, &limits);
1517 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1518 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1519 )
1520 tty->print_cr(
1521 "Stack size of %d Kb exceeds current limit of %d Kb.\n"
1522 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1523 "See limit(1) to increase the stack size limit.",
1524 stack_size / K, jt->stack_size() / K);
1525 vm_exit(1);
1526 }
1527 assert(jt->stack_size() >= stack_size,
1528 "Attempt to map more stack than was allocated");
1529 jt->set_stack_size(stack_size);
1530 }
1531
1532 // 5/22/01: Right now alternate signal stacks do not handle
1533 // throwing stack overflow exceptions, see bug 4463178
1534 // Until a fix is found for this, T2 will NOT imply alternate signal
1535 // stacks.
1536 // If using T2 libthread threads, install an alternate signal stack.
1537 // Because alternate stacks associate with LWPs on Solaris,
1538 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads
1539 // we prefer to explicitly stack bang.
1540 // If not using T2 libthread, but using UseBoundThreads any threads
1541 // (primordial thread, jni_attachCurrentThread) we do not create,
1542 // probably are not bound, therefore they can not have an alternate
1543 // signal stack. Since our stack banging code is generated and
1544 // is shared across threads, all threads must be bound to allow
1545 // using alternate signal stacks. The alternative is to interpose
1546 // on _lwp_create to associate an alt sig stack with each LWP,
1547 // and this could be a problem when the JVM is embedded.
1548 // We would prefer to use alternate signal stacks with T2
1549 // Since there is currently no accurate way to detect T2
1550 // we do not. Assuming T2 when running T1 causes sig 11s or assertions
1551 // on installing alternate signal stacks
1552
1553
1554 // 05/09/03: removed alternate signal stack support for Solaris
1555 // The alternate signal stack mechanism is no longer needed to
1556 // handle stack overflow. This is now handled by allocating
1557 // guard pages (red zone) and stackbanging.
1558 // Initially the alternate signal stack mechanism was removed because
1559 // it did not work with T1 llibthread. Alternate
1560 // signal stacks MUST have all threads bound to lwps. Applications
1561 // can create their own threads and attach them without their being
1562 // bound under T1. This is frequently the case for the primordial thread.
1563 // If we were ever to reenable this mechanism we would need to
1564 // use the dynamic check for T2 libthread.
1565
1566 os::Solaris::init_thread_fpu_state();
1567 std::set_terminate(_handle_uncaught_cxx_exception);
1568 }
1569
1570
1571
1572 // Free Solaris resources related to the OSThread
1573 void os::free_thread(OSThread* osthread) {
1574 assert(osthread != NULL, "os::free_thread but osthread not set");
1575
1576
1577 // We are told to free resources of the argument thread,
1578 // but we can only really operate on the current thread.
1579 // The main thread must take the VMThread down synchronously
1580 // before the main thread exits and frees up CodeHeap
1581 guarantee((Thread::current()->osthread() == osthread
1582 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1583 if (Thread::current()->osthread() == osthread) {
1584 // Restore caller's signal mask
1585 sigset_t sigmask = osthread->caller_sigmask();
1586 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1587 }
1588 delete osthread;
1589 }
1590
1591 void os::pd_start_thread(Thread* thread) {
1592 int status = thr_continue(thread->osthread()->thread_id());
1593 assert_status(status == 0, status, "thr_continue failed");
1594 }
1595
1596
1597 intx os::current_thread_id() {
1598 return (intx)thr_self();
1599 }
1600
1601 static pid_t _initial_pid = 0;
1602
1603 int os::current_process_id() {
1604 return (int)(_initial_pid ? _initial_pid : getpid());
1605 }
1606
1607 int os::allocate_thread_local_storage() {
1608 // %%% in Win32 this allocates a memory segment pointed to by a
1609 // register. Dan Stein can implement a similar feature in
1610 // Solaris. Alternatively, the VM can do the same thing
1611 // explicitly: malloc some storage and keep the pointer in a
1612 // register (which is part of the thread's context) (or keep it
1613 // in TLS).
1614 // %%% In current versions of Solaris, thr_self and TSD can
1615 // be accessed via short sequences of displaced indirections.
1616 // The value of thr_self is available as %g7(36).
1617 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1618 // assuming that the current thread already has a value bound to k.
1619 // It may be worth experimenting with such access patterns,
1620 // and later having the parameters formally exported from a Solaris
1621 // interface. I think, however, that it will be faster to
1622 // maintain the invariant that %g2 always contains the
1623 // JavaThread in Java code, and have stubs simply
1624 // treat %g2 as a caller-save register, preserving it in a %lN.
1625 thread_key_t tk;
1626 if (thr_keycreate( &tk, NULL ) )
1627 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1628 "(%s)", strerror(errno)));
1629 return int(tk);
1630 }
1631
1632 void os::free_thread_local_storage(int index) {
1633 // %%% don't think we need anything here
1634 // if ( pthread_key_delete((pthread_key_t) tk) )
1635 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1636 }
1637
1638 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific
1639 // small number - point is NO swap space available
1640 void os::thread_local_storage_at_put(int index, void* value) {
1641 // %%% this is used only in threadLocalStorage.cpp
1642 if (thr_setspecific((thread_key_t)index, value)) {
1643 if (errno == ENOMEM) {
1644 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space");
1645 } else {
1646 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1647 "(%s)", strerror(errno)));
1648 }
1649 } else {
1650 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ;
1651 }
1652 }
1653
1654 // This function could be called before TLS is initialized, for example, when
1655 // VM receives an async signal or when VM causes a fatal error during
1656 // initialization. Return NULL if thr_getspecific() fails.
1657 void* os::thread_local_storage_at(int index) {
1658 // %%% this is used only in threadLocalStorage.cpp
1659 void* r = NULL;
1660 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1661 }
1662
1663
1664 // gethrtime can move backwards if read from one cpu and then a different cpu
1665 // getTimeNanos is guaranteed to not move backward on Solaris
1666 // local spinloop created as faster for a CAS on an int than
1667 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not
1668 // supported on sparc v8 or pre supports_cx8 intel boxes.
1669 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong
1670 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes
1671 inline hrtime_t oldgetTimeNanos() {
1672 int gotlock = LOCK_INVALID;
1673 hrtime_t newtime = gethrtime();
1674
1675 for (;;) {
1676 // grab lock for max_hrtime
1677 int curlock = max_hrtime_lock;
1678 if (curlock & LOCK_BUSY) continue;
1679 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue;
1680 if (newtime > max_hrtime) {
1681 max_hrtime = newtime;
1682 } else {
1683 newtime = max_hrtime;
1684 }
1685 // release lock
1686 max_hrtime_lock = LOCK_FREE;
1687 return newtime;
1688 }
1689 }
1690 // gethrtime can move backwards if read from one cpu and then a different cpu
1691 // getTimeNanos is guaranteed to not move backward on Solaris
1692 inline hrtime_t getTimeNanos() {
1693 if (VM_Version::supports_cx8()) {
1694 const hrtime_t now = gethrtime();
1695 // Use atomic long load since 32-bit x86 uses 2 registers to keep long.
1696 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime);
1697 if (now <= prev) return prev; // same or retrograde time;
1698 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1699 assert(obsv >= prev, "invariant"); // Monotonicity
1700 // If the CAS succeeded then we're done and return "now".
1701 // If the CAS failed and the observed value "obs" is >= now then
1702 // we should return "obs". If the CAS failed and now > obs > prv then
1703 // some other thread raced this thread and installed a new value, in which case
1704 // we could either (a) retry the entire operation, (b) retry trying to install now
1705 // or (c) just return obs. We use (c). No loop is required although in some cases
1706 // we might discard a higher "now" value in deference to a slightly lower but freshly
1707 // installed obs value. That's entirely benign -- it admits no new orderings compared
1708 // to (a) or (b) -- and greatly reduces coherence traffic.
1709 // We might also condition (c) on the magnitude of the delta between obs and now.
1710 // Avoiding excessive CAS operations to hot RW locations is critical.
1711 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate
1712 return (prev == obsv) ? now : obsv ;
1713 } else {
1714 return oldgetTimeNanos();
1715 }
1716 }
1717
1718 // Time since start-up in seconds to a fine granularity.
1719 // Used by VMSelfDestructTimer and the MemProfiler.
1720 double os::elapsedTime() {
1721 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1722 }
1723
1724 jlong os::elapsed_counter() {
1725 return (jlong)(getTimeNanos() - first_hrtime);
1726 }
1727
1728 jlong os::elapsed_frequency() {
1729 return hrtime_hz;
1730 }
1731
1732 // Return the real, user, and system times in seconds from an
1733 // arbitrary fixed point in the past.
1734 bool os::getTimesSecs(double* process_real_time,
1735 double* process_user_time,
1736 double* process_system_time) {
1737 struct tms ticks;
1738 clock_t real_ticks = times(&ticks);
1739
1740 if (real_ticks == (clock_t) (-1)) {
1741 return false;
1742 } else {
1743 double ticks_per_second = (double) clock_tics_per_sec;
1744 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1745 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1746 // For consistency return the real time from getTimeNanos()
1747 // converted to seconds.
1748 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1749
1750 return true;
1751 }
1752 }
1753
1754 bool os::supports_vtime() { return true; }
1755
1756 bool os::enable_vtime() {
1757 int fd = ::open("/proc/self/ctl", O_WRONLY);
1758 if (fd == -1)
1759 return false;
1760
1761 long cmd[] = { PCSET, PR_MSACCT };
1762 int res = ::write(fd, cmd, sizeof(long) * 2);
1763 ::close(fd);
1764 if (res != sizeof(long) * 2)
1765 return false;
1766
1767 return true;
1768 }
1769
1770 bool os::vtime_enabled() {
1771 int fd = ::open("/proc/self/status", O_RDONLY);
1772 if (fd == -1)
1773 return false;
1774
1775 pstatus_t status;
1776 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1777 ::close(fd);
1778 if (res != sizeof(pstatus_t))
1779 return false;
1780
1781 return status.pr_flags & PR_MSACCT;
1782 }
1783
1784 double os::elapsedVTime() {
1785 return (double)gethrvtime() / (double)hrtime_hz;
1786 }
1787
1788 // Used internally for comparisons only
1789 // getTimeMillis guaranteed to not move backwards on Solaris
1790 jlong getTimeMillis() {
1791 jlong nanotime = getTimeNanos();
1792 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1793 }
1794
1795 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1796 jlong os::javaTimeMillis() {
1797 timeval t;
1798 if (gettimeofday( &t, NULL) == -1)
1799 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1800 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1801 }
1802
1803 jlong os::javaTimeNanos() {
1804 return (jlong)getTimeNanos();
1805 }
1806
1807 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1808 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1809 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1810 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1811 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1812 }
1813
1814 char * os::local_time_string(char *buf, size_t buflen) {
1815 struct tm t;
1816 time_t long_time;
1817 time(&long_time);
1818 localtime_r(&long_time, &t);
1819 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1820 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1821 t.tm_hour, t.tm_min, t.tm_sec);
1822 return buf;
1823 }
1824
1825 // Note: os::shutdown() might be called very early during initialization, or
1826 // called from signal handler. Before adding something to os::shutdown(), make
1827 // sure it is async-safe and can handle partially initialized VM.
1828 void os::shutdown() {
1829
1830 // allow PerfMemory to attempt cleanup of any persistent resources
1831 perfMemory_exit();
1832
1833 // needs to remove object in file system
1834 AttachListener::abort();
1835
1836 // flush buffered output, finish log files
1837 ostream_abort();
1838
1839 // Check for abort hook
1840 abort_hook_t abort_hook = Arguments::abort_hook();
1841 if (abort_hook != NULL) {
1842 abort_hook();
1843 }
1844 }
1845
1846 // Note: os::abort() might be called very early during initialization, or
1847 // called from signal handler. Before adding something to os::abort(), make
1848 // sure it is async-safe and can handle partially initialized VM.
1849 void os::abort(bool dump_core) {
1850 os::shutdown();
1851 if (dump_core) {
1852 #ifndef PRODUCT
1853 fdStream out(defaultStream::output_fd());
1854 out.print_raw("Current thread is ");
1855 char buf[16];
1856 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1857 out.print_raw_cr(buf);
1858 out.print_raw_cr("Dumping core ...");
1859 #endif
1860 ::abort(); // dump core (for debugging)
1861 }
1862
1863 ::exit(1);
1864 }
1865
1866 // Die immediately, no exit hook, no abort hook, no cleanup.
1867 void os::die() {
1868 ::abort(); // dump core (for debugging)
1869 }
1870
1871 // unused
1872 void os::set_error_file(const char *logfile) {}
1873
1874 // DLL functions
1875
1876 const char* os::dll_file_extension() { return ".so"; }
1877
1878 // This must be hard coded because it's the system's temporary
1879 // directory not the java application's temp directory, ala java.io.tmpdir.
1880 const char* os::get_temp_directory() { return "/tmp"; }
1881
1882 static bool file_exists(const char* filename) {
1883 struct stat statbuf;
1884 if (filename == NULL || strlen(filename) == 0) {
1885 return false;
1886 }
1887 return os::stat(filename, &statbuf) == 0;
1888 }
1889
1890 bool os::dll_build_name(char* buffer, size_t buflen,
1891 const char* pname, const char* fname) {
1892 bool retval = false;
1893 const size_t pnamelen = pname ? strlen(pname) : 0;
1894
1895 // Return error on buffer overflow.
1896 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1897 return retval;
1898 }
1899
1900 if (pnamelen == 0) {
1901 snprintf(buffer, buflen, "lib%s.so", fname);
1902 retval = true;
1903 } else if (strchr(pname, *os::path_separator()) != NULL) {
1904 int n;
1905 char** pelements = split_path(pname, &n);
1906 for (int i = 0 ; i < n ; i++) {
1907 // really shouldn't be NULL but what the heck, check can't hurt
1908 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1909 continue; // skip the empty path values
1910 }
1911 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1912 if (file_exists(buffer)) {
1913 retval = true;
1914 break;
1915 }
1916 }
1917 // release the storage
1918 for (int i = 0 ; i < n ; i++) {
1919 if (pelements[i] != NULL) {
1920 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
1921 }
1922 }
1923 if (pelements != NULL) {
1924 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
1925 }
1926 } else {
1927 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1928 retval = true;
1929 }
1930 return retval;
1931 }
1932
1933 const char* os::get_current_directory(char *buf, int buflen) {
1934 return getcwd(buf, buflen);
1935 }
1936
1937 // check if addr is inside libjvm.so
1938 bool os::address_is_in_vm(address addr) {
1939 static address libjvm_base_addr;
1940 Dl_info dlinfo;
1941
1942 if (libjvm_base_addr == NULL) {
1943 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
1944 libjvm_base_addr = (address)dlinfo.dli_fbase;
1945 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1946 }
1947
1948 if (dladdr((void *)addr, &dlinfo)) {
1949 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1950 }
1951
1952 return false;
1953 }
1954
1955 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int);
1956 static dladdr1_func_type dladdr1_func = NULL;
1957
1958 bool os::dll_address_to_function_name(address addr, char *buf,
1959 int buflen, int * offset) {
1960 Dl_info dlinfo;
1961
1962 // dladdr1_func was initialized in os::init()
1963 if (dladdr1_func){
1964 // yes, we have dladdr1
1965
1966 // Support for dladdr1 is checked at runtime; it may be
1967 // available even if the vm is built on a machine that does
1968 // not have dladdr1 support. Make sure there is a value for
1969 // RTLD_DL_SYMENT.
1970 #ifndef RTLD_DL_SYMENT
1971 #define RTLD_DL_SYMENT 1
1972 #endif
1973 #ifdef _LP64
1974 Elf64_Sym * info;
1975 #else
1976 Elf32_Sym * info;
1977 #endif
1978 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1979 RTLD_DL_SYMENT)) {
1980 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1981 if (buf != NULL) {
1982 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
1983 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1984 }
1985 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1986 return true;
1987 }
1988 }
1989 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
1990 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1991 buf, buflen, offset, dlinfo.dli_fname)) {
1992 return true;
1993 }
1994 }
1995 if (buf != NULL) buf[0] = '\0';
1996 if (offset != NULL) *offset = -1;
1997 return false;
1998 } else {
1999 // no, only dladdr is available
2000 if (dladdr((void *)addr, &dlinfo)) {
2001 if (buf != NULL) {
2002 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
2003 jio_snprintf(buf, buflen, dlinfo.dli_sname);
2004 }
2005 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
2006 return true;
2007 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
2008 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
2009 buf, buflen, offset, dlinfo.dli_fname)) {
2010 return true;
2011 }
2012 }
2013 if (buf != NULL) buf[0] = '\0';
2014 if (offset != NULL) *offset = -1;
2015 return false;
2016 }
2017 }
2018
2019 bool os::dll_address_to_library_name(address addr, char* buf,
2020 int buflen, int* offset) {
2021 Dl_info dlinfo;
2022
2023 if (dladdr((void*)addr, &dlinfo)){
2024 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
2025 if (offset) *offset = addr - (address)dlinfo.dli_fbase;
2026 return true;
2027 } else {
2028 if (buf) buf[0] = '\0';
2029 if (offset) *offset = -1;
2030 return false;
2031 }
2032 }
2033
2034 // Prints the names and full paths of all opened dynamic libraries
2035 // for current process
2036 void os::print_dll_info(outputStream * st) {
2037 Dl_info dli;
2038 void *handle;
2039 Link_map *map;
2040 Link_map *p;
2041
2042 st->print_cr("Dynamic libraries:"); st->flush();
2043
2044 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) {
2045 st->print_cr("Error: Cannot print dynamic libraries.");
2046 return;
2047 }
2048 handle = dlopen(dli.dli_fname, RTLD_LAZY);
2049 if (handle == NULL) {
2050 st->print_cr("Error: Cannot print dynamic libraries.");
2051 return;
2052 }
2053 dlinfo(handle, RTLD_DI_LINKMAP, &map);
2054 if (map == NULL) {
2055 st->print_cr("Error: Cannot print dynamic libraries.");
2056 return;
2057 }
2058
2059 while (map->l_prev != NULL)
2060 map = map->l_prev;
2061
2062 while (map != NULL) {
2063 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
2064 map = map->l_next;
2065 }
2066
2067 dlclose(handle);
2068 }
2069
2070 // Loads .dll/.so and
2071 // in case of error it checks if .dll/.so was built for the
2072 // same architecture as Hotspot is running on
2073
2074 void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
2075 {
2076 void * result= ::dlopen(filename, RTLD_LAZY);
2077 if (result != NULL) {
2078 // Successful loading
2079 return result;
2080 }
2081
2082 Elf32_Ehdr elf_head;
2083
2084 // Read system error message into ebuf
2085 // It may or may not be overwritten below
2086 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
2087 ebuf[ebuflen-1]='\0';
2088 int diag_msg_max_length=ebuflen-strlen(ebuf);
2089 char* diag_msg_buf=ebuf+strlen(ebuf);
2090
2091 if (diag_msg_max_length==0) {
2092 // No more space in ebuf for additional diagnostics message
2093 return NULL;
2094 }
2095
2096
2097 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
2098
2099 if (file_descriptor < 0) {
2100 // Can't open library, report dlerror() message
2101 return NULL;
2102 }
2103
2104 bool failed_to_read_elf_head=
2105 (sizeof(elf_head)!=
2106 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
2107
2108 ::close(file_descriptor);
2109 if (failed_to_read_elf_head) {
2110 // file i/o error - report dlerror() msg
2111 return NULL;
2112 }
2113
2114 typedef struct {
2115 Elf32_Half code; // Actual value as defined in elf.h
2116 Elf32_Half compat_class; // Compatibility of archs at VM's sense
2117 char elf_class; // 32 or 64 bit
2118 char endianess; // MSB or LSB
2119 char* name; // String representation
2120 } arch_t;
2121
2122 static const arch_t arch_array[]={
2123 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2124 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2125 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
2126 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
2127 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2128 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2129 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
2130 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
2131 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
2132 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
2133 };
2134
2135 #if (defined IA32)
2136 static Elf32_Half running_arch_code=EM_386;
2137 #elif (defined AMD64)
2138 static Elf32_Half running_arch_code=EM_X86_64;
2139 #elif (defined IA64)
2140 static Elf32_Half running_arch_code=EM_IA_64;
2141 #elif (defined __sparc) && (defined _LP64)
2142 static Elf32_Half running_arch_code=EM_SPARCV9;
2143 #elif (defined __sparc) && (!defined _LP64)
2144 static Elf32_Half running_arch_code=EM_SPARC;
2145 #elif (defined __powerpc64__)
2146 static Elf32_Half running_arch_code=EM_PPC64;
2147 #elif (defined __powerpc__)
2148 static Elf32_Half running_arch_code=EM_PPC;
2149 #elif (defined ARM)
2150 static Elf32_Half running_arch_code=EM_ARM;
2151 #else
2152 #error Method os::dll_load requires that one of following is defined:\
2153 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
2154 #endif
2155
2156 // Identify compatability class for VM's architecture and library's architecture
2157 // Obtain string descriptions for architectures
2158
2159 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
2160 int running_arch_index=-1;
2161
2162 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
2163 if (running_arch_code == arch_array[i].code) {
2164 running_arch_index = i;
2165 }
2166 if (lib_arch.code == arch_array[i].code) {
2167 lib_arch.compat_class = arch_array[i].compat_class;
2168 lib_arch.name = arch_array[i].name;
2169 }
2170 }
2171
2172 assert(running_arch_index != -1,
2173 "Didn't find running architecture code (running_arch_code) in arch_array");
2174 if (running_arch_index == -1) {
2175 // Even though running architecture detection failed
2176 // we may still continue with reporting dlerror() message
2177 return NULL;
2178 }
2179
2180 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
2181 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
2182 return NULL;
2183 }
2184
2185 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
2186 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
2187 return NULL;
2188 }
2189
2190 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
2191 if ( lib_arch.name!=NULL ) {
2192 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2193 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
2194 lib_arch.name, arch_array[running_arch_index].name);
2195 } else {
2196 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2197 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
2198 lib_arch.code,
2199 arch_array[running_arch_index].name);
2200 }
2201 }
2202
2203 return NULL;
2204 }
2205
2206 void* os::dll_lookup(void* handle, const char* name) {
2207 return dlsym(handle, name);
2208 }
2209
2210 int os::stat(const char *path, struct stat *sbuf) {
2211 char pathbuf[MAX_PATH];
2212 if (strlen(path) > MAX_PATH - 1) {
2213 errno = ENAMETOOLONG;
2214 return -1;
2215 }
2216 os::native_path(strcpy(pathbuf, path));
2217 return ::stat(pathbuf, sbuf);
2218 }
2219
2220 static bool _print_ascii_file(const char* filename, outputStream* st) {
2221 int fd = ::open(filename, O_RDONLY);
2222 if (fd == -1) {
2223 return false;
2224 }
2225
2226 char buf[32];
2227 int bytes;
2228 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
2229 st->print_raw(buf, bytes);
2230 }
2231
2232 ::close(fd);
2233
2234 return true;
2235 }
2236
2237 void os::print_os_info_brief(outputStream* st) {
2238 os::Solaris::print_distro_info(st);
2239
2240 os::Posix::print_uname_info(st);
2241
2242 os::Solaris::print_libversion_info(st);
2243 }
2244
2245 void os::print_os_info(outputStream* st) {
2246 st->print("OS:");
2247
2248 os::Solaris::print_distro_info(st);
2249
2250 os::Posix::print_uname_info(st);
2251
2252 os::Solaris::print_libversion_info(st);
2253
2254 os::Posix::print_rlimit_info(st);
2255
2256 os::Posix::print_load_average(st);
2257 }
2258
2259 void os::Solaris::print_distro_info(outputStream* st) {
2260 if (!_print_ascii_file("/etc/release", st)) {
2261 st->print("Solaris");
2262 }
2263 st->cr();
2264 }
2265
2266 void os::Solaris::print_libversion_info(outputStream* st) {
2267 if (os::Solaris::T2_libthread()) {
2268 st->print(" (T2 libthread)");
2269 }
2270 else {
2271 st->print(" (T1 libthread)");
2272 }
2273 st->cr();
2274 }
2275
2276 static bool check_addr0(outputStream* st) {
2277 jboolean status = false;
2278 int fd = ::open("/proc/self/map",O_RDONLY);
2279 if (fd >= 0) {
2280 prmap_t p;
2281 while(::read(fd, &p, sizeof(p)) > 0) {
2282 if (p.pr_vaddr == 0x0) {
2283 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
2284 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
2285 st->print("Access:");
2286 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
2287 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
2288 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
2289 st->cr();
2290 status = true;
2291 }
2292 ::close(fd);
2293 }
2294 }
2295 return status;
2296 }
2297
2298 void os::pd_print_cpu_info(outputStream* st) {
2299 // Nothing to do for now.
2300 }
2301
2302 void os::print_memory_info(outputStream* st) {
2303 st->print("Memory:");
2304 st->print(" %dk page", os::vm_page_size()>>10);
2305 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2306 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2307 st->cr();
2308 (void) check_addr0(st);
2309 }
2310
2311 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific
2312 // but they're the same for all the solaris architectures that we support.
2313 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR",
2314 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG",
2315 "ILL_COPROC", "ILL_BADSTK" };
2316
2317 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV",
2318 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES",
2319 "FPE_FLTINV", "FPE_FLTSUB" };
2320
2321 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" };
2322
2323 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" };
2324
2325 void os::print_siginfo(outputStream* st, void* siginfo) {
2326 st->print("siginfo:");
2327
2328 const int buflen = 100;
2329 char buf[buflen];
2330 siginfo_t *si = (siginfo_t*)siginfo;
2331 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen));
2332 char *err = strerror(si->si_errno);
2333 if (si->si_errno != 0 && err != NULL) {
2334 st->print("si_errno=%s", err);
2335 } else {
2336 st->print("si_errno=%d", si->si_errno);
2337 }
2338 const int c = si->si_code;
2339 assert(c > 0, "unexpected si_code");
2340 switch (si->si_signo) {
2341 case SIGILL:
2342 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]);
2343 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2344 break;
2345 case SIGFPE:
2346 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]);
2347 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2348 break;
2349 case SIGSEGV:
2350 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]);
2351 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2352 break;
2353 case SIGBUS:
2354 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]);
2355 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2356 break;
2357 default:
2358 st->print(", si_code=%d", si->si_code);
2359 // no si_addr
2360 }
2361
2362 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2363 UseSharedSpaces) {
2364 FileMapInfo* mapinfo = FileMapInfo::current_info();
2365 if (mapinfo->is_in_shared_space(si->si_addr)) {
2366 st->print("\n\nError accessing class data sharing archive." \
2367 " Mapped file inaccessible during execution, " \
2368 " possible disk/network problem.");
2369 }
2370 }
2371 st->cr();
2372 }
2373
2374 // Moved from whole group, because we need them here for diagnostic
2375 // prints.
2376 #define OLDMAXSIGNUM 32
2377 static int Maxsignum = 0;
2378 static int *ourSigFlags = NULL;
2379
2380 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2381
2382 int os::Solaris::get_our_sigflags(int sig) {
2383 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2384 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2385 return ourSigFlags[sig];
2386 }
2387
2388 void os::Solaris::set_our_sigflags(int sig, int flags) {
2389 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2390 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2391 ourSigFlags[sig] = flags;
2392 }
2393
2394
2395 static const char* get_signal_handler_name(address handler,
2396 char* buf, int buflen) {
2397 int offset;
2398 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2399 if (found) {
2400 // skip directory names
2401 const char *p1, *p2;
2402 p1 = buf;
2403 size_t len = strlen(os::file_separator());
2404 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2405 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2406 } else {
2407 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2408 }
2409 return buf;
2410 }
2411
2412 static void print_signal_handler(outputStream* st, int sig,
2413 char* buf, size_t buflen) {
2414 struct sigaction sa;
2415
2416 sigaction(sig, NULL, &sa);
2417
2418 st->print("%s: ", os::exception_name(sig, buf, buflen));
2419
2420 address handler = (sa.sa_flags & SA_SIGINFO)
2421 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2422 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2423
2424 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2425 st->print("SIG_DFL");
2426 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2427 st->print("SIG_IGN");
2428 } else {
2429 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2430 }
2431
2432 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask);
2433
2434 address rh = VMError::get_resetted_sighandler(sig);
2435 // May be, handler was resetted by VMError?
2436 if(rh != NULL) {
2437 handler = rh;
2438 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2439 }
2440
2441 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags);
2442
2443 // Check: is it our handler?
2444 if(handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2445 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2446 // It is our signal handler
2447 // check for flags
2448 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2449 st->print(
2450 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2451 os::Solaris::get_our_sigflags(sig));
2452 }
2453 }
2454 st->cr();
2455 }
2456
2457 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2458 st->print_cr("Signal Handlers:");
2459 print_signal_handler(st, SIGSEGV, buf, buflen);
2460 print_signal_handler(st, SIGBUS , buf, buflen);
2461 print_signal_handler(st, SIGFPE , buf, buflen);
2462 print_signal_handler(st, SIGPIPE, buf, buflen);
2463 print_signal_handler(st, SIGXFSZ, buf, buflen);
2464 print_signal_handler(st, SIGILL , buf, buflen);
2465 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2466 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2467 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2468 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2469 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2470 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2471 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2472 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2473 }
2474
2475 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2476
2477 // Find the full path to the current module, libjvm.so
2478 void os::jvm_path(char *buf, jint buflen) {
2479 // Error checking.
2480 if (buflen < MAXPATHLEN) {
2481 assert(false, "must use a large-enough buffer");
2482 buf[0] = '\0';
2483 return;
2484 }
2485 // Lazy resolve the path to current module.
2486 if (saved_jvm_path[0] != 0) {
2487 strcpy(buf, saved_jvm_path);
2488 return;
2489 }
2490
2491 Dl_info dlinfo;
2492 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2493 assert(ret != 0, "cannot locate libjvm");
2494 realpath((char *)dlinfo.dli_fname, buf);
2495
2496 if (Arguments::created_by_gamma_launcher()) {
2497 // Support for the gamma launcher. Typical value for buf is
2498 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at
2499 // the right place in the string, then assume we are installed in a JDK and
2500 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix
2501 // up the path so it looks like libjvm.so is installed there (append a
2502 // fake suffix hotspot/libjvm.so).
2503 const char *p = buf + strlen(buf) - 1;
2504 for (int count = 0; p > buf && count < 5; ++count) {
2505 for (--p; p > buf && *p != '/'; --p)
2506 /* empty */ ;
2507 }
2508
2509 if (strncmp(p, "/jre/lib/", 9) != 0) {
2510 // Look for JAVA_HOME in the environment.
2511 char* java_home_var = ::getenv("JAVA_HOME");
2512 if (java_home_var != NULL && java_home_var[0] != 0) {
2513 char cpu_arch[12];
2514 char* jrelib_p;
2515 int len;
2516 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2517 #ifdef _LP64
2518 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2519 if (strcmp(cpu_arch, "sparc") == 0) {
2520 strcat(cpu_arch, "v9");
2521 } else if (strcmp(cpu_arch, "i386") == 0) {
2522 strcpy(cpu_arch, "amd64");
2523 }
2524 #endif
2525 // Check the current module name "libjvm.so".
2526 p = strrchr(buf, '/');
2527 assert(strstr(p, "/libjvm") == p, "invalid library name");
2528
2529 realpath(java_home_var, buf);
2530 // determine if this is a legacy image or modules image
2531 // modules image doesn't have "jre" subdirectory
2532 len = strlen(buf);
2533 jrelib_p = buf + len;
2534 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2535 if (0 != access(buf, F_OK)) {
2536 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2537 }
2538
2539 if (0 == access(buf, F_OK)) {
2540 // Use current module name "libjvm.so"
2541 len = strlen(buf);
2542 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
2543 } else {
2544 // Go back to path of .so
2545 realpath((char *)dlinfo.dli_fname, buf);
2546 }
2547 }
2548 }
2549 }
2550
2551 strcpy(saved_jvm_path, buf);
2552 }
2553
2554
2555 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2556 // no prefix required, not even "_"
2557 }
2558
2559
2560 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2561 // no suffix required
2562 }
2563
2564 // This method is a copy of JDK's sysGetLastErrorString
2565 // from src/solaris/hpi/src/system_md.c
2566
2567 size_t os::lasterror(char *buf, size_t len) {
2568
2569 if (errno == 0) return 0;
2570
2571 const char *s = ::strerror(errno);
2572 size_t n = ::strlen(s);
2573 if (n >= len) {
2574 n = len - 1;
2575 }
2576 ::strncpy(buf, s, n);
2577 buf[n] = '\0';
2578 return n;
2579 }
2580
2581
2582 // sun.misc.Signal
2583
2584 extern "C" {
2585 static void UserHandler(int sig, void *siginfo, void *context) {
2586 // Ctrl-C is pressed during error reporting, likely because the error
2587 // handler fails to abort. Let VM die immediately.
2588 if (sig == SIGINT && is_error_reported()) {
2589 os::die();
2590 }
2591
2592 os::signal_notify(sig);
2593 // We do not need to reinstate the signal handler each time...
2594 }
2595 }
2596
2597 void* os::user_handler() {
2598 return CAST_FROM_FN_PTR(void*, UserHandler);
2599 }
2600
2601 extern "C" {
2602 typedef void (*sa_handler_t)(int);
2603 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2604 }
2605
2606 void* os::signal(int signal_number, void* handler) {
2607 struct sigaction sigAct, oldSigAct;
2608 sigfillset(&(sigAct.sa_mask));
2609 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2610 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2611
2612 if (sigaction(signal_number, &sigAct, &oldSigAct))
2613 // -1 means registration failed
2614 return (void *)-1;
2615
2616 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2617 }
2618
2619 void os::signal_raise(int signal_number) {
2620 raise(signal_number);
2621 }
2622
2623 /*
2624 * The following code is moved from os.cpp for making this
2625 * code platform specific, which it is by its very nature.
2626 */
2627
2628 // a counter for each possible signal value
2629 static int Sigexit = 0;
2630 static int Maxlibjsigsigs;
2631 static jint *pending_signals = NULL;
2632 static int *preinstalled_sigs = NULL;
2633 static struct sigaction *chainedsigactions = NULL;
2634 static sema_t sig_sem;
2635 typedef int (*version_getting_t)();
2636 version_getting_t os::Solaris::get_libjsig_version = NULL;
2637 static int libjsigversion = NULL;
2638
2639 int os::sigexitnum_pd() {
2640 assert(Sigexit > 0, "signal memory not yet initialized");
2641 return Sigexit;
2642 }
2643
2644 void os::Solaris::init_signal_mem() {
2645 // Initialize signal structures
2646 Maxsignum = SIGRTMAX;
2647 Sigexit = Maxsignum+1;
2648 assert(Maxsignum >0, "Unable to obtain max signal number");
2649
2650 Maxlibjsigsigs = Maxsignum;
2651
2652 // pending_signals has one int per signal
2653 // The additional signal is for SIGEXIT - exit signal to signal_thread
2654 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2655 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2656
2657 if (UseSignalChaining) {
2658 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2659 * (Maxsignum + 1), mtInternal);
2660 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2661 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2662 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2663 }
2664 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal);
2665 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2666 }
2667
2668 void os::signal_init_pd() {
2669 int ret;
2670
2671 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2672 assert(ret == 0, "sema_init() failed");
2673 }
2674
2675 void os::signal_notify(int signal_number) {
2676 int ret;
2677
2678 Atomic::inc(&pending_signals[signal_number]);
2679 ret = ::sema_post(&sig_sem);
2680 assert(ret == 0, "sema_post() failed");
2681 }
2682
2683 static int check_pending_signals(bool wait_for_signal) {
2684 int ret;
2685 while (true) {
2686 for (int i = 0; i < Sigexit + 1; i++) {
2687 jint n = pending_signals[i];
2688 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2689 return i;
2690 }
2691 }
2692 if (!wait_for_signal) {
2693 return -1;
2694 }
2695 JavaThread *thread = JavaThread::current();
2696 ThreadBlockInVM tbivm(thread);
2697
2698 bool threadIsSuspended;
2699 do {
2700 thread->set_suspend_equivalent();
2701 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2702 while((ret = ::sema_wait(&sig_sem)) == EINTR)
2703 ;
2704 assert(ret == 0, "sema_wait() failed");
2705
2706 // were we externally suspended while we were waiting?
2707 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2708 if (threadIsSuspended) {
2709 //
2710 // The semaphore has been incremented, but while we were waiting
2711 // another thread suspended us. We don't want to continue running
2712 // while suspended because that would surprise the thread that
2713 // suspended us.
2714 //
2715 ret = ::sema_post(&sig_sem);
2716 assert(ret == 0, "sema_post() failed");
2717
2718 thread->java_suspend_self();
2719 }
2720 } while (threadIsSuspended);
2721 }
2722 }
2723
2724 int os::signal_lookup() {
2725 return check_pending_signals(false);
2726 }
2727
2728 int os::signal_wait() {
2729 return check_pending_signals(true);
2730 }
2731
2732 ////////////////////////////////////////////////////////////////////////////////
2733 // Virtual Memory
2734
2735 static int page_size = -1;
2736
2737 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2738 // clear this var if support is not available.
2739 static bool has_map_align = true;
2740
2741 int os::vm_page_size() {
2742 assert(page_size != -1, "must call os::init");
2743 return page_size;
2744 }
2745
2746 // Solaris allocates memory by pages.
2747 int os::vm_allocation_granularity() {
2748 assert(page_size != -1, "must call os::init");
2749 return page_size;
2750 }
2751
2752 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2753 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2754 size_t size = bytes;
2755 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2756 if (res != NULL) {
2757 if (UseNUMAInterleaving) {
2758 numa_make_global(addr, bytes);
2759 }
2760 return true;
2761 }
2762 return false;
2763 }
2764
2765 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2766 bool exec) {
2767 if (commit_memory(addr, bytes, exec)) {
2768 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) {
2769 // If the large page size has been set and the VM
2770 // is using large pages, use the large page size
2771 // if it is smaller than the alignment hint. This is
2772 // a case where the VM wants to use a larger alignment size
2773 // for its own reasons but still want to use large pages
2774 // (which is what matters to setting the mpss range.
2775 size_t page_size = 0;
2776 if (large_page_size() < alignment_hint) {
2777 assert(UseLargePages, "Expected to be here for large page use only");
2778 page_size = large_page_size();
2779 } else {
2780 // If the alignment hint is less than the large page
2781 // size, the VM wants a particular alignment (thus the hint)
2782 // for internal reasons. Try to set the mpss range using
2783 // the alignment_hint.
2784 page_size = alignment_hint;
2785 }
2786 // Since this is a hint, ignore any failures.
2787 (void)Solaris::set_mpss_range(addr, bytes, page_size);
2788 }
2789 return true;
2790 }
2791 return false;
2792 }
2793
2794 // Uncommit the pages in a specified region.
2795 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2796 if (madvise(addr, bytes, MADV_FREE) < 0) {
2797 debug_only(warning("MADV_FREE failed."));
2798 return;
2799 }
2800 }
2801
2802 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2803 return os::commit_memory(addr, size);
2804 }
2805
2806 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2807 return os::uncommit_memory(addr, size);
2808 }
2809
2810 // Change the page size in a given range.
2811 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2812 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2813 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2814 if (UseLargePages && UseMPSS) {
2815 Solaris::set_mpss_range(addr, bytes, alignment_hint);
2816 }
2817 }
2818
2819 // Tell the OS to make the range local to the first-touching LWP
2820 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2821 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2822 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2823 debug_only(warning("MADV_ACCESS_LWP failed."));
2824 }
2825 }
2826
2827 // Tell the OS that this range would be accessed from different LWPs.
2828 void os::numa_make_global(char *addr, size_t bytes) {
2829 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2830 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2831 debug_only(warning("MADV_ACCESS_MANY failed."));
2832 }
2833 }
2834
2835 // Get the number of the locality groups.
2836 size_t os::numa_get_groups_num() {
2837 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2838 return n != -1 ? n : 1;
2839 }
2840
2841 // Get a list of leaf locality groups. A leaf lgroup is group that
2842 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2843 // board. An LWP is assigned to one of these groups upon creation.
2844 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2845 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2846 ids[0] = 0;
2847 return 1;
2848 }
2849 int result_size = 0, top = 1, bottom = 0, cur = 0;
2850 for (int k = 0; k < size; k++) {
2851 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2852 (Solaris::lgrp_id_t*)&ids[top], size - top);
2853 if (r == -1) {
2854 ids[0] = 0;
2855 return 1;
2856 }
2857 if (!r) {
2858 // That's a leaf node.
2859 assert (bottom <= cur, "Sanity check");
2860 // Check if the node has memory
2861 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2862 NULL, 0, LGRP_RSRC_MEM) > 0) {
2863 ids[bottom++] = ids[cur];
2864 }
2865 }
2866 top += r;
2867 cur++;
2868 }
2869 if (bottom == 0) {
2870 // Handle a situation, when the OS reports no memory available.
2871 // Assume UMA architecture.
2872 ids[0] = 0;
2873 return 1;
2874 }
2875 return bottom;
2876 }
2877
2878 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2879 bool os::numa_topology_changed() {
2880 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2881 if (is_stale != -1 && is_stale) {
2882 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2883 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2884 assert(c != 0, "Failure to initialize LGRP API");
2885 Solaris::set_lgrp_cookie(c);
2886 return true;
2887 }
2888 return false;
2889 }
2890
2891 // Get the group id of the current LWP.
2892 int os::numa_get_group_id() {
2893 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2894 if (lgrp_id == -1) {
2895 return 0;
2896 }
2897 const int size = os::numa_get_groups_num();
2898 int *ids = (int*)alloca(size * sizeof(int));
2899
2900 // Get the ids of all lgroups with memory; r is the count.
2901 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2902 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2903 if (r <= 0) {
2904 return 0;
2905 }
2906 return ids[os::random() % r];
2907 }
2908
2909 // Request information about the page.
2910 bool os::get_page_info(char *start, page_info* info) {
2911 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2912 uint64_t addr = (uintptr_t)start;
2913 uint64_t outdata[2];
2914 uint_t validity = 0;
2915
2916 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2917 return false;
2918 }
2919
2920 info->size = 0;
2921 info->lgrp_id = -1;
2922
2923 if ((validity & 1) != 0) {
2924 if ((validity & 2) != 0) {
2925 info->lgrp_id = outdata[0];
2926 }
2927 if ((validity & 4) != 0) {
2928 info->size = outdata[1];
2929 }
2930 return true;
2931 }
2932 return false;
2933 }
2934
2935 // Scan the pages from start to end until a page different than
2936 // the one described in the info parameter is encountered.
2937 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
2938 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2939 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2940 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT];
2941 uint_t validity[MAX_MEMINFO_CNT];
2942
2943 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2944 uint64_t p = (uint64_t)start;
2945 while (p < (uint64_t)end) {
2946 addrs[0] = p;
2947 size_t addrs_count = 1;
2948 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2949 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2950 addrs_count++;
2951 }
2952
2953 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2954 return NULL;
2955 }
2956
2957 size_t i = 0;
2958 for (; i < addrs_count; i++) {
2959 if ((validity[i] & 1) != 0) {
2960 if ((validity[i] & 4) != 0) {
2961 if (outdata[types * i + 1] != page_expected->size) {
2962 break;
2963 }
2964 } else
2965 if (page_expected->size != 0) {
2966 break;
2967 }
2968
2969 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2970 if (outdata[types * i] != page_expected->lgrp_id) {
2971 break;
2972 }
2973 }
2974 } else {
2975 return NULL;
2976 }
2977 }
2978
2979 if (i != addrs_count) {
2980 if ((validity[i] & 2) != 0) {
2981 page_found->lgrp_id = outdata[types * i];
2982 } else {
2983 page_found->lgrp_id = -1;
2984 }
2985 if ((validity[i] & 4) != 0) {
2986 page_found->size = outdata[types * i + 1];
2987 } else {
2988 page_found->size = 0;
2989 }
2990 return (char*)addrs[i];
2991 }
2992
2993 p = addrs[addrs_count - 1] + page_size;
2994 }
2995 return end;
2996 }
2997
2998 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2999 size_t size = bytes;
3000 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3001 // uncommitted page. Otherwise, the read/write might succeed if we
3002 // have enough swap space to back the physical page.
3003 return
3004 NULL != Solaris::mmap_chunk(addr, size,
3005 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
3006 PROT_NONE);
3007 }
3008
3009 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
3010 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
3011
3012 if (b == MAP_FAILED) {
3013 return NULL;
3014 }
3015 return b;
3016 }
3017
3018 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) {
3019 char* addr = requested_addr;
3020 int flags = MAP_PRIVATE | MAP_NORESERVE;
3021
3022 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap");
3023
3024 if (fixed) {
3025 flags |= MAP_FIXED;
3026 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
3027 flags |= MAP_ALIGN;
3028 addr = (char*) alignment_hint;
3029 }
3030
3031 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3032 // uncommitted page. Otherwise, the read/write might succeed if we
3033 // have enough swap space to back the physical page.
3034 return mmap_chunk(addr, bytes, flags, PROT_NONE);
3035 }
3036
3037 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
3038 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL));
3039
3040 guarantee(requested_addr == NULL || requested_addr == addr,
3041 "OS failed to return requested mmap address.");
3042 return addr;
3043 }
3044
3045 // Reserve memory at an arbitrary address, only if that area is
3046 // available (and not reserved for something else).
3047
3048 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
3049 const int max_tries = 10;
3050 char* base[max_tries];
3051 size_t size[max_tries];
3052
3053 // Solaris adds a gap between mmap'ed regions. The size of the gap
3054 // is dependent on the requested size and the MMU. Our initial gap
3055 // value here is just a guess and will be corrected later.
3056 bool had_top_overlap = false;
3057 bool have_adjusted_gap = false;
3058 size_t gap = 0x400000;
3059
3060 // Assert only that the size is a multiple of the page size, since
3061 // that's all that mmap requires, and since that's all we really know
3062 // about at this low abstraction level. If we need higher alignment,
3063 // we can either pass an alignment to this method or verify alignment
3064 // in one of the methods further up the call chain. See bug 5044738.
3065 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
3066
3067 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
3068 // Give it a try, if the kernel honors the hint we can return immediately.
3069 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
3070
3071 volatile int err = errno;
3072 if (addr == requested_addr) {
3073 return addr;
3074 } else if (addr != NULL) {
3075 pd_unmap_memory(addr, bytes);
3076 }
3077
3078 if (PrintMiscellaneous && Verbose) {
3079 char buf[256];
3080 buf[0] = '\0';
3081 if (addr == NULL) {
3082 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
3083 }
3084 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
3085 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
3086 "%s", bytes, requested_addr, addr, buf);
3087 }
3088
3089 // Address hint method didn't work. Fall back to the old method.
3090 // In theory, once SNV becomes our oldest supported platform, this
3091 // code will no longer be needed.
3092 //
3093 // Repeatedly allocate blocks until the block is allocated at the
3094 // right spot. Give up after max_tries.
3095 int i;
3096 for (i = 0; i < max_tries; ++i) {
3097 base[i] = reserve_memory(bytes);
3098
3099 if (base[i] != NULL) {
3100 // Is this the block we wanted?
3101 if (base[i] == requested_addr) {
3102 size[i] = bytes;
3103 break;
3104 }
3105
3106 // check that the gap value is right
3107 if (had_top_overlap && !have_adjusted_gap) {
3108 size_t actual_gap = base[i-1] - base[i] - bytes;
3109 if (gap != actual_gap) {
3110 // adjust the gap value and retry the last 2 allocations
3111 assert(i > 0, "gap adjustment code problem");
3112 have_adjusted_gap = true; // adjust the gap only once, just in case
3113 gap = actual_gap;
3114 if (PrintMiscellaneous && Verbose) {
3115 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
3116 }
3117 unmap_memory(base[i], bytes);
3118 unmap_memory(base[i-1], size[i-1]);
3119 i-=2;
3120 continue;
3121 }
3122 }
3123
3124 // Does this overlap the block we wanted? Give back the overlapped
3125 // parts and try again.
3126 //
3127 // There is still a bug in this code: if top_overlap == bytes,
3128 // the overlap is offset from requested region by the value of gap.
3129 // In this case giving back the overlapped part will not work,
3130 // because we'll give back the entire block at base[i] and
3131 // therefore the subsequent allocation will not generate a new gap.
3132 // This could be fixed with a new algorithm that used larger
3133 // or variable size chunks to find the requested region -
3134 // but such a change would introduce additional complications.
3135 // It's rare enough that the planets align for this bug,
3136 // so we'll just wait for a fix for 6204603/5003415 which
3137 // will provide a mmap flag to allow us to avoid this business.
3138
3139 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
3140 if (top_overlap >= 0 && top_overlap < bytes) {
3141 had_top_overlap = true;
3142 unmap_memory(base[i], top_overlap);
3143 base[i] += top_overlap;
3144 size[i] = bytes - top_overlap;
3145 } else {
3146 size_t bottom_overlap = base[i] + bytes - requested_addr;
3147 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
3148 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
3149 warning("attempt_reserve_memory_at: possible alignment bug");
3150 }
3151 unmap_memory(requested_addr, bottom_overlap);
3152 size[i] = bytes - bottom_overlap;
3153 } else {
3154 size[i] = bytes;
3155 }
3156 }
3157 }
3158 }
3159
3160 // Give back the unused reserved pieces.
3161
3162 for (int j = 0; j < i; ++j) {
3163 if (base[j] != NULL) {
3164 unmap_memory(base[j], size[j]);
3165 }
3166 }
3167
3168 return (i < max_tries) ? requested_addr : NULL;
3169 }
3170
3171 bool os::pd_release_memory(char* addr, size_t bytes) {
3172 size_t size = bytes;
3173 return munmap(addr, size) == 0;
3174 }
3175
3176 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
3177 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
3178 "addr must be page aligned");
3179 int retVal = mprotect(addr, bytes, prot);
3180 return retVal == 0;
3181 }
3182
3183 // Protect memory (Used to pass readonly pages through
3184 // JNI GetArray<type>Elements with empty arrays.)
3185 // Also, used for serialization page and for compressed oops null pointer
3186 // checking.
3187 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3188 bool is_committed) {
3189 unsigned int p = 0;
3190 switch (prot) {
3191 case MEM_PROT_NONE: p = PROT_NONE; break;
3192 case MEM_PROT_READ: p = PROT_READ; break;
3193 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3194 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3195 default:
3196 ShouldNotReachHere();
3197 }
3198 // is_committed is unused.
3199 return solaris_mprotect(addr, bytes, p);
3200 }
3201
3202 // guard_memory and unguard_memory only happens within stack guard pages.
3203 // Since ISM pertains only to the heap, guard and unguard memory should not
3204 /// happen with an ISM region.
3205 bool os::guard_memory(char* addr, size_t bytes) {
3206 return solaris_mprotect(addr, bytes, PROT_NONE);
3207 }
3208
3209 bool os::unguard_memory(char* addr, size_t bytes) {
3210 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3211 }
3212
3213 // Large page support
3214
3215 // UseLargePages is the master flag to enable/disable large page memory.
3216 // UseMPSS and UseISM are supported for compatibility reasons. Their combined
3217 // effects can be described in the following table:
3218 //
3219 // UseLargePages UseMPSS UseISM
3220 // false * * => UseLargePages is the master switch, turning
3221 // it off will turn off both UseMPSS and
3222 // UseISM. VM will not use large page memory
3223 // regardless the settings of UseMPSS/UseISM.
3224 // true false false => Unless future Solaris provides other
3225 // mechanism to use large page memory, this
3226 // combination is equivalent to -UseLargePages,
3227 // VM will not use large page memory
3228 // true true false => JVM will use MPSS for large page memory.
3229 // This is the default behavior.
3230 // true false true => JVM will use ISM for large page memory.
3231 // true true true => JVM will use ISM if it is available.
3232 // Otherwise, JVM will fall back to MPSS.
3233 // Becaues ISM is now available on all
3234 // supported Solaris versions, this combination
3235 // is equivalent to +UseISM -UseMPSS.
3236
3237 static size_t _large_page_size = 0;
3238
3239 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) {
3240 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address
3241 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc
3242 // can support multiple page sizes.
3243
3244 // Don't bother to probe page size because getpagesizes() comes with MPSS.
3245 // ISM is only recommended on old Solaris where there is no MPSS support.
3246 // Simply choose a conservative value as default.
3247 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes :
3248 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M)
3249 ARM_ONLY(2 * M);
3250
3251 // ISM is available on all supported Solaris versions
3252 return true;
3253 }
3254
3255 // Insertion sort for small arrays (descending order).
3256 static void insertion_sort_descending(size_t* array, int len) {
3257 for (int i = 0; i < len; i++) {
3258 size_t val = array[i];
3259 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3260 size_t tmp = array[key];
3261 array[key] = array[key - 1];
3262 array[key - 1] = tmp;
3263 }
3264 }
3265 }
3266
3267 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
3268 const unsigned int usable_count = VM_Version::page_size_count();
3269 if (usable_count == 1) {
3270 return false;
3271 }
3272
3273 // Find the right getpagesizes interface. When solaris 11 is the minimum
3274 // build platform, getpagesizes() (without the '2') can be called directly.
3275 typedef int (*gps_t)(size_t[], int);
3276 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3277 if (gps_func == NULL) {
3278 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3279 if (gps_func == NULL) {
3280 if (warn) {
3281 warning("MPSS is not supported by the operating system.");
3282 }
3283 return false;
3284 }
3285 }
3286
3287 // Fill the array of page sizes.
3288 int n = (*gps_func)(_page_sizes, page_sizes_max);
3289 assert(n > 0, "Solaris bug?");
3290
3291 if (n == page_sizes_max) {
3292 // Add a sentinel value (necessary only if the array was completely filled
3293 // since it is static (zeroed at initialization)).
3294 _page_sizes[--n] = 0;
3295 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3296 }
3297 assert(_page_sizes[n] == 0, "missing sentinel");
3298 trace_page_sizes("available page sizes", _page_sizes, n);
3299
3300 if (n == 1) return false; // Only one page size available.
3301
3302 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3303 // select up to usable_count elements. First sort the array, find the first
3304 // acceptable value, then copy the usable sizes to the top of the array and
3305 // trim the rest. Make sure to include the default page size :-).
3306 //
3307 // A better policy could get rid of the 4M limit by taking the sizes of the
3308 // important VM memory regions (java heap and possibly the code cache) into
3309 // account.
3310 insertion_sort_descending(_page_sizes, n);
3311 const size_t size_limit =
3312 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3313 int beg;
3314 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
3315 const int end = MIN2((int)usable_count, n) - 1;
3316 for (int cur = 0; cur < end; ++cur, ++beg) {
3317 _page_sizes[cur] = _page_sizes[beg];
3318 }
3319 _page_sizes[end] = vm_page_size();
3320 _page_sizes[end + 1] = 0;
3321
3322 if (_page_sizes[end] > _page_sizes[end - 1]) {
3323 // Default page size is not the smallest; sort again.
3324 insertion_sort_descending(_page_sizes, end + 1);
3325 }
3326 *page_size = _page_sizes[0];
3327
3328 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3329 return true;
3330 }
3331
3332 void os::large_page_init() {
3333 if (!UseLargePages) {
3334 UseISM = false;
3335 UseMPSS = false;
3336 return;
3337 }
3338
3339 // print a warning if any large page related flag is specified on command line
3340 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3341 !FLAG_IS_DEFAULT(UseISM) ||
3342 !FLAG_IS_DEFAULT(UseMPSS) ||
3343 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3344 UseISM = UseISM &&
3345 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size);
3346 if (UseISM) {
3347 // ISM disables MPSS to be compatible with old JDK behavior
3348 UseMPSS = false;
3349 _page_sizes[0] = _large_page_size;
3350 _page_sizes[1] = vm_page_size();
3351 }
3352
3353 UseMPSS = UseMPSS &&
3354 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3355
3356 UseLargePages = UseISM || UseMPSS;
3357 }
3358
3359 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) {
3360 // Signal to OS that we want large pages for addresses
3361 // from addr, addr + bytes
3362 struct memcntl_mha mpss_struct;
3363 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3364 mpss_struct.mha_pagesize = align;
3365 mpss_struct.mha_flags = 0;
3366 if (memcntl(start, bytes, MC_HAT_ADVISE,
3367 (caddr_t) &mpss_struct, 0, 0) < 0) {
3368 debug_only(warning("Attempt to use MPSS failed."));
3369 return false;
3370 }
3371 return true;
3372 }
3373
3374 char* os::reserve_memory_special(size_t size, char* addr, bool exec) {
3375 // "exec" is passed in but not used. Creating the shared image for
3376 // the code cache doesn't have an SHM_X executable permission to check.
3377 assert(UseLargePages && UseISM, "only for ISM large pages");
3378
3379 char* retAddr = NULL;
3380 int shmid;
3381 key_t ismKey;
3382
3383 bool warn_on_failure = UseISM &&
3384 (!FLAG_IS_DEFAULT(UseLargePages) ||
3385 !FLAG_IS_DEFAULT(UseISM) ||
3386 !FLAG_IS_DEFAULT(LargePageSizeInBytes)
3387 );
3388 char msg[128];
3389
3390 ismKey = IPC_PRIVATE;
3391
3392 // Create a large shared memory region to attach to based on size.
3393 // Currently, size is the total size of the heap
3394 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT);
3395 if (shmid == -1){
3396 if (warn_on_failure) {
3397 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
3398 warning(msg);
3399 }
3400 return NULL;
3401 }
3402
3403 // Attach to the region
3404 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W);
3405 int err = errno;
3406
3407 // Remove shmid. If shmat() is successful, the actual shared memory segment
3408 // will be deleted when it's detached by shmdt() or when the process
3409 // terminates. If shmat() is not successful this will remove the shared
3410 // segment immediately.
3411 shmctl(shmid, IPC_RMID, NULL);
3412
3413 if (retAddr == (char *) -1) {
3414 if (warn_on_failure) {
3415 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
3416 warning(msg);
3417 }
3418 return NULL;
3419 }
3420 if ((retAddr != NULL) && UseNUMAInterleaving) {
3421 numa_make_global(retAddr, size);
3422 }
3423
3424 // The memory is committed
3425 address pc = CALLER_PC;
3426 MemTracker::record_virtual_memory_reserve((address)retAddr, size, pc);
3427 MemTracker::record_virtual_memory_commit((address)retAddr, size, pc);
3428
3429 return retAddr;
3430 }
3431
3432 bool os::release_memory_special(char* base, size_t bytes) {
3433 // detaching the SHM segment will also delete it, see reserve_memory_special()
3434 int rslt = shmdt(base);
3435 if (rslt == 0) {
3436 MemTracker::record_virtual_memory_uncommit((address)base, bytes);
3437 MemTracker::record_virtual_memory_release((address)base, bytes);
3438 return true;
3439 } else {
3440 return false;
3441 }
3442 }
3443
3444 size_t os::large_page_size() {
3445 return _large_page_size;
3446 }
3447
3448 // MPSS allows application to commit large page memory on demand; with ISM
3449 // the entire memory region must be allocated as shared memory.
3450 bool os::can_commit_large_page_memory() {
3451 return UseISM ? false : true;
3452 }
3453
3454 bool os::can_execute_large_page_memory() {
3455 return UseISM ? false : true;
3456 }
3457
3458 static int os_sleep(jlong millis, bool interruptible) {
3459 const jlong limit = INT_MAX;
3460 jlong prevtime;
3461 int res;
3462
3463 while (millis > limit) {
3464 if ((res = os_sleep(limit, interruptible)) != OS_OK)
3465 return res;
3466 millis -= limit;
3467 }
3468
3469 // Restart interrupted polls with new parameters until the proper delay
3470 // has been completed.
3471
3472 prevtime = getTimeMillis();
3473
3474 while (millis > 0) {
3475 jlong newtime;
3476
3477 if (!interruptible) {
3478 // Following assert fails for os::yield_all:
3479 // assert(!thread->is_Java_thread(), "must not be java thread");
3480 res = poll(NULL, 0, millis);
3481 } else {
3482 JavaThread *jt = JavaThread::current();
3483
3484 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt,
3485 os::Solaris::clear_interrupted);
3486 }
3487
3488 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for
3489 // thread.Interrupt.
3490
3491 // See c/r 6751923. Poll can return 0 before time
3492 // has elapsed if time is set via clock_settime (as NTP does).
3493 // res == 0 if poll timed out (see man poll RETURN VALUES)
3494 // using the logic below checks that we really did
3495 // sleep at least "millis" if not we'll sleep again.
3496 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) {
3497 newtime = getTimeMillis();
3498 assert(newtime >= prevtime, "time moving backwards");
3499 /* Doing prevtime and newtime in microseconds doesn't help precision,
3500 and trying to round up to avoid lost milliseconds can result in a
3501 too-short delay. */
3502 millis -= newtime - prevtime;
3503 if(millis <= 0)
3504 return OS_OK;
3505 prevtime = newtime;
3506 } else
3507 return res;
3508 }
3509
3510 return OS_OK;
3511 }
3512
3513 // Read calls from inside the vm need to perform state transitions
3514 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3515 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3516 }
3517
3518 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3519 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3520 }
3521
3522 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
3523 assert(thread == Thread::current(), "thread consistency check");
3524
3525 // TODO-FIXME: this should be removed.
3526 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock
3527 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate
3528 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving
3529 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel
3530 // is fooled into believing that the system is making progress. In the code below we block the
3531 // the watcher thread while safepoint is in progress so that it would not appear as though the
3532 // system is making progress.
3533 if (!Solaris::T2_libthread() &&
3534 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) {
3535 // We now try to acquire the threads lock. Since this lock is held by the VM thread during
3536 // the entire safepoint, the watcher thread will line up here during the safepoint.
3537 Threads_lock->lock_without_safepoint_check();
3538 Threads_lock->unlock();
3539 }
3540
3541 if (thread->is_Java_thread()) {
3542 // This is a JavaThread so we honor the _thread_blocked protocol
3543 // even for sleeps of 0 milliseconds. This was originally done
3544 // as a workaround for bug 4338139. However, now we also do it
3545 // to honor the suspend-equivalent protocol.
3546
3547 JavaThread *jt = (JavaThread *) thread;
3548 ThreadBlockInVM tbivm(jt);
3549
3550 jt->set_suspend_equivalent();
3551 // cleared by handle_special_suspend_equivalent_condition() or
3552 // java_suspend_self() via check_and_wait_while_suspended()
3553
3554 int ret_code;
3555 if (millis <= 0) {
3556 thr_yield();
3557 ret_code = 0;
3558 } else {
3559 // The original sleep() implementation did not create an
3560 // OSThreadWaitState helper for sleeps of 0 milliseconds.
3561 // I'm preserving that decision for now.
3562 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
3563
3564 ret_code = os_sleep(millis, interruptible);
3565 }
3566
3567 // were we externally suspended while we were waiting?
3568 jt->check_and_wait_while_suspended();
3569
3570 return ret_code;
3571 }
3572
3573 // non-JavaThread from this point on:
3574
3575 if (millis <= 0) {
3576 thr_yield();
3577 return 0;
3578 }
3579
3580 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
3581
3582 return os_sleep(millis, interruptible);
3583 }
3584
3585 int os::naked_sleep() {
3586 // %% make the sleep time an integer flag. for now use 1 millisec.
3587 return os_sleep(1, false);
3588 }
3589
3590 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3591 void os::infinite_sleep() {
3592 while (true) { // sleep forever ...
3593 ::sleep(100); // ... 100 seconds at a time
3594 }
3595 }
3596
3597 // Used to convert frequent JVM_Yield() to nops
3598 bool os::dont_yield() {
3599 if (DontYieldALot) {
3600 static hrtime_t last_time = 0;
3601 hrtime_t diff = getTimeNanos() - last_time;
3602
3603 if (diff < DontYieldALotInterval * 1000000)
3604 return true;
3605
3606 last_time += diff;
3607
3608 return false;
3609 }
3610 else {
3611 return false;
3612 }
3613 }
3614
3615 // Caveat: Solaris os::yield() causes a thread-state transition whereas
3616 // the linux and win32 implementations do not. This should be checked.
3617
3618 void os::yield() {
3619 // Yields to all threads with same or greater priority
3620 os::sleep(Thread::current(), 0, false);
3621 }
3622
3623 // Note that yield semantics are defined by the scheduling class to which
3624 // the thread currently belongs. Typically, yield will _not yield to
3625 // other equal or higher priority threads that reside on the dispatch queues
3626 // of other CPUs.
3627
3628 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
3629
3630
3631 // On Solaris we found that yield_all doesn't always yield to all other threads.
3632 // There have been cases where there is a thread ready to execute but it doesn't
3633 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
3634 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a
3635 // SIGWAITING signal which will cause a new lwp to be created. So we count the
3636 // number of times yield_all is called in the one loop and increase the sleep
3637 // time after 8 attempts. If this fails too we increase the concurrency level
3638 // so that the starving thread would get an lwp
3639
3640 void os::yield_all(int attempts) {
3641 // Yields to all threads, including threads with lower priorities
3642 if (attempts == 0) {
3643 os::sleep(Thread::current(), 1, false);
3644 } else {
3645 int iterations = attempts % 30;
3646 if (iterations == 0 && !os::Solaris::T2_libthread()) {
3647 // thr_setconcurrency and _getconcurrency make sense only under T1.
3648 int noofLWPS = thr_getconcurrency();
3649 if (noofLWPS < (Threads::number_of_threads() + 2)) {
3650 thr_setconcurrency(thr_getconcurrency() + 1);
3651 }
3652 } else if (iterations < 25) {
3653 os::sleep(Thread::current(), 1, false);
3654 } else {
3655 os::sleep(Thread::current(), 10, false);
3656 }
3657 }
3658 }
3659
3660 // Called from the tight loops to possibly influence time-sharing heuristics
3661 void os::loop_breaker(int attempts) {
3662 os::yield_all(attempts);
3663 }
3664
3665
3666 // Interface for setting lwp priorities. If we are using T2 libthread,
3667 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3668 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3669 // function is meaningless in this mode so we must adjust the real lwp's priority
3670 // The routines below implement the getting and setting of lwp priorities.
3671 //
3672 // Note: There are three priority scales used on Solaris. Java priotities
3673 // which range from 1 to 10, libthread "thr_setprio" scale which range
3674 // from 0 to 127, and the current scheduling class of the process we
3675 // are running in. This is typically from -60 to +60.
3676 // The setting of the lwp priorities in done after a call to thr_setprio
3677 // so Java priorities are mapped to libthread priorities and we map from
3678 // the latter to lwp priorities. We don't keep priorities stored in
3679 // Java priorities since some of our worker threads want to set priorities
3680 // higher than all Java threads.
3681 //
3682 // For related information:
3683 // (1) man -s 2 priocntl
3684 // (2) man -s 4 priocntl
3685 // (3) man dispadmin
3686 // = librt.so
3687 // = libthread/common/rtsched.c - thrp_setlwpprio().
3688 // = ps -cL <pid> ... to validate priority.
3689 // = sched_get_priority_min and _max
3690 // pthread_create
3691 // sched_setparam
3692 // pthread_setschedparam
3693 //
3694 // Assumptions:
3695 // + We assume that all threads in the process belong to the same
3696 // scheduling class. IE. an homogenous process.
3697 // + Must be root or in IA group to change change "interactive" attribute.
3698 // Priocntl() will fail silently. The only indication of failure is when
3699 // we read-back the value and notice that it hasn't changed.
3700 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3701 // + For RT, change timeslice as well. Invariant:
3702 // constant "priority integral"
3703 // Konst == TimeSlice * (60-Priority)
3704 // Given a priority, compute appropriate timeslice.
3705 // + Higher numerical values have higher priority.
3706
3707 // sched class attributes
3708 typedef struct {
3709 int schedPolicy; // classID
3710 int maxPrio;
3711 int minPrio;
3712 } SchedInfo;
3713
3714
3715 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3716
3717 #ifdef ASSERT
3718 static int ReadBackValidate = 1;
3719 #endif
3720 static int myClass = 0;
3721 static int myMin = 0;
3722 static int myMax = 0;
3723 static int myCur = 0;
3724 static bool priocntl_enable = false;
3725
3726 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3727 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3728
3729 // Call the version of priocntl suitable for all supported versions
3730 // of Solaris. We need to call through this wrapper so that we can
3731 // build on Solaris 9 and run on Solaris 8, 9 and 10.
3732 //
3733 // This code should be removed if we ever stop supporting Solaris 8
3734 // and earlier releases.
3735
3736 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3737 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3738 static priocntl_type priocntl_ptr = priocntl_stub;
3739
3740 // Stub to set the value of the real pointer, and then call the real
3741 // function.
3742
3743 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) {
3744 // Try Solaris 8- name only.
3745 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl");
3746 guarantee(tmp != NULL, "priocntl function not found.");
3747 priocntl_ptr = tmp;
3748 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg);
3749 }
3750
3751
3752 // lwp_priocntl_init
3753 //
3754 // Try to determine the priority scale for our process.
3755 //
3756 // Return errno or 0 if OK.
3757 //
3758 static
3759 int lwp_priocntl_init ()
3760 {
3761 int rslt;
3762 pcinfo_t ClassInfo;
3763 pcparms_t ParmInfo;
3764 int i;
3765
3766 if (!UseThreadPriorities) return 0;
3767
3768 // We are using Bound threads, we need to determine our priority ranges
3769 if (os::Solaris::T2_libthread() || UseBoundThreads) {
3770 // If ThreadPriorityPolicy is 1, switch tables
3771 if (ThreadPriorityPolicy == 1) {
3772 for (i = 0 ; i < CriticalPriority+1; i++)
3773 os::java_to_os_priority[i] = prio_policy1[i];
3774 }
3775 if (UseCriticalJavaThreadPriority) {
3776 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3777 // See set_native_priority() and set_lwp_class_and_priority().
3778 // Save original MaxPriority mapping in case attempt to
3779 // use critical priority fails.
3780 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3781 // Set negative to distinguish from other priorities
3782 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3783 }
3784 }
3785 // Not using Bound Threads, set to ThreadPolicy 1
3786 else {
3787 for ( i = 0 ; i < CriticalPriority+1; i++ ) {
3788 os::java_to_os_priority[i] = prio_policy1[i];
3789 }
3790 return 0;
3791 }
3792
3793 // Get IDs for a set of well-known scheduling classes.
3794 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3795 // the system. We should have a loop that iterates over the
3796 // classID values, which are known to be "small" integers.
3797
3798 strcpy(ClassInfo.pc_clname, "TS");
3799 ClassInfo.pc_cid = -1;
3800 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3801 if (rslt < 0) return errno;
3802 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3803 tsLimits.schedPolicy = ClassInfo.pc_cid;
3804 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3805 tsLimits.minPrio = -tsLimits.maxPrio;
3806
3807 strcpy(ClassInfo.pc_clname, "IA");
3808 ClassInfo.pc_cid = -1;
3809 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3810 if (rslt < 0) return errno;
3811 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3812 iaLimits.schedPolicy = ClassInfo.pc_cid;
3813 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3814 iaLimits.minPrio = -iaLimits.maxPrio;
3815
3816 strcpy(ClassInfo.pc_clname, "RT");
3817 ClassInfo.pc_cid = -1;
3818 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3819 if (rslt < 0) return errno;
3820 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3821 rtLimits.schedPolicy = ClassInfo.pc_cid;
3822 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3823 rtLimits.minPrio = 0;
3824
3825 strcpy(ClassInfo.pc_clname, "FX");
3826 ClassInfo.pc_cid = -1;
3827 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3828 if (rslt < 0) return errno;
3829 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3830 fxLimits.schedPolicy = ClassInfo.pc_cid;
3831 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3832 fxLimits.minPrio = 0;
3833
3834 // Query our "current" scheduling class.
3835 // This will normally be IA, TS or, rarely, FX or RT.
3836 memset(&ParmInfo, 0, sizeof(ParmInfo));
3837 ParmInfo.pc_cid = PC_CLNULL;
3838 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3839 if (rslt < 0) return errno;
3840 myClass = ParmInfo.pc_cid;
3841
3842 // We now know our scheduling classId, get specific information
3843 // about the class.
3844 ClassInfo.pc_cid = myClass;
3845 ClassInfo.pc_clname[0] = 0;
3846 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3847 if (rslt < 0) return errno;
3848
3849 if (ThreadPriorityVerbose) {
3850 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3851 }
3852
3853 memset(&ParmInfo, 0, sizeof(pcparms_t));
3854 ParmInfo.pc_cid = PC_CLNULL;
3855 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3856 if (rslt < 0) return errno;
3857
3858 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3859 myMin = rtLimits.minPrio;
3860 myMax = rtLimits.maxPrio;
3861 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3862 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3863 myMin = iaLimits.minPrio;
3864 myMax = iaLimits.maxPrio;
3865 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3866 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3867 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3868 myMin = tsLimits.minPrio;
3869 myMax = tsLimits.maxPrio;
3870 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3871 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3872 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3873 myMin = fxLimits.minPrio;
3874 myMax = fxLimits.maxPrio;
3875 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3876 } else {
3877 // No clue - punt
3878 if (ThreadPriorityVerbose)
3879 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
3880 return EINVAL; // no clue, punt
3881 }
3882
3883 if (ThreadPriorityVerbose) {
3884 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
3885 }
3886
3887 priocntl_enable = true; // Enable changing priorities
3888 return 0;
3889 }
3890
3891 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3892 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3893 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3894 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3895
3896
3897 // scale_to_lwp_priority
3898 //
3899 // Convert from the libthread "thr_setprio" scale to our current
3900 // lwp scheduling class scale.
3901 //
3902 static
3903 int scale_to_lwp_priority (int rMin, int rMax, int x)
3904 {
3905 int v;
3906
3907 if (x == 127) return rMax; // avoid round-down
3908 v = (((x*(rMax-rMin)))/128)+rMin;
3909 return v;
3910 }
3911
3912
3913 // set_lwp_class_and_priority
3914 //
3915 // Set the class and priority of the lwp. This call should only
3916 // be made when using bound threads (T2 threads are bound by default).
3917 //
3918 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3919 int newPrio, int new_class, bool scale) {
3920 int rslt;
3921 int Actual, Expected, prv;
3922 pcparms_t ParmInfo; // for GET-SET
3923 #ifdef ASSERT
3924 pcparms_t ReadBack; // for readback
3925 #endif
3926
3927 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3928 // Query current values.
3929 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3930 // Cache "pcparms_t" in global ParmCache.
3931 // TODO: elide set-to-same-value
3932
3933 // If something went wrong on init, don't change priorities.
3934 if ( !priocntl_enable ) {
3935 if (ThreadPriorityVerbose)
3936 tty->print_cr("Trying to set priority but init failed, ignoring");
3937 return EINVAL;
3938 }
3939
3940 // If lwp hasn't started yet, just return
3941 // the _start routine will call us again.
3942 if ( lwpid <= 0 ) {
3943 if (ThreadPriorityVerbose) {
3944 tty->print_cr ("deferring the set_lwp_class_and_priority of thread "
3945 INTPTR_FORMAT " to %d, lwpid not set",
3946 ThreadID, newPrio);
3947 }
3948 return 0;
3949 }
3950
3951 if (ThreadPriorityVerbose) {
3952 tty->print_cr ("set_lwp_class_and_priority("
3953 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3954 ThreadID, lwpid, newPrio);
3955 }
3956
3957 memset(&ParmInfo, 0, sizeof(pcparms_t));
3958 ParmInfo.pc_cid = PC_CLNULL;
3959 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3960 if (rslt < 0) return errno;
3961
3962 int cur_class = ParmInfo.pc_cid;
3963 ParmInfo.pc_cid = (id_t)new_class;
3964
3965 if (new_class == rtLimits.schedPolicy) {
3966 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3967 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3968 rtLimits.maxPrio, newPrio)
3969 : newPrio;
3970 rtInfo->rt_tqsecs = RT_NOCHANGE;
3971 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3972 if (ThreadPriorityVerbose) {
3973 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3974 }
3975 } else if (new_class == iaLimits.schedPolicy) {
3976 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3977 int maxClamped = MIN2(iaLimits.maxPrio,
3978 cur_class == new_class
3979 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3980 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3981 maxClamped, newPrio)
3982 : newPrio;
3983 iaInfo->ia_uprilim = cur_class == new_class
3984 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3985 iaInfo->ia_mode = IA_NOCHANGE;
3986 if (ThreadPriorityVerbose) {
3987 tty->print_cr("IA: [%d...%d] %d->%d\n",
3988 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3989 }
3990 } else if (new_class == tsLimits.schedPolicy) {
3991 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3992 int maxClamped = MIN2(tsLimits.maxPrio,
3993 cur_class == new_class
3994 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3995 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3996 maxClamped, newPrio)
3997 : newPrio;
3998 tsInfo->ts_uprilim = cur_class == new_class
3999 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
4000 if (ThreadPriorityVerbose) {
4001 tty->print_cr("TS: [%d...%d] %d->%d\n",
4002 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
4003 }
4004 } else if (new_class == fxLimits.schedPolicy) {
4005 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
4006 int maxClamped = MIN2(fxLimits.maxPrio,
4007 cur_class == new_class
4008 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
4009 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
4010 maxClamped, newPrio)
4011 : newPrio;
4012 fxInfo->fx_uprilim = cur_class == new_class
4013 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
4014 fxInfo->fx_tqsecs = FX_NOCHANGE;
4015 fxInfo->fx_tqnsecs = FX_NOCHANGE;
4016 if (ThreadPriorityVerbose) {
4017 tty->print_cr("FX: [%d...%d] %d->%d\n",
4018 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
4019 }
4020 } else {
4021 if (ThreadPriorityVerbose) {
4022 tty->print_cr("Unknown new scheduling class %d\n", new_class);
4023 }
4024 return EINVAL; // no clue, punt
4025 }
4026
4027 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
4028 if (ThreadPriorityVerbose && rslt) {
4029 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
4030 }
4031 if (rslt < 0) return errno;
4032
4033 #ifdef ASSERT
4034 // Sanity check: read back what we just attempted to set.
4035 // In theory it could have changed in the interim ...
4036 //
4037 // The priocntl system call is tricky.
4038 // Sometimes it'll validate the priority value argument and
4039 // return EINVAL if unhappy. At other times it fails silently.
4040 // Readbacks are prudent.
4041
4042 if (!ReadBackValidate) return 0;
4043
4044 memset(&ReadBack, 0, sizeof(pcparms_t));
4045 ReadBack.pc_cid = PC_CLNULL;
4046 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
4047 assert(rslt >= 0, "priocntl failed");
4048 Actual = Expected = 0xBAD;
4049 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
4050 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
4051 Actual = RTPRI(ReadBack)->rt_pri;
4052 Expected = RTPRI(ParmInfo)->rt_pri;
4053 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
4054 Actual = IAPRI(ReadBack)->ia_upri;
4055 Expected = IAPRI(ParmInfo)->ia_upri;
4056 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
4057 Actual = TSPRI(ReadBack)->ts_upri;
4058 Expected = TSPRI(ParmInfo)->ts_upri;
4059 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
4060 Actual = FXPRI(ReadBack)->fx_upri;
4061 Expected = FXPRI(ParmInfo)->fx_upri;
4062 } else {
4063 if (ThreadPriorityVerbose) {
4064 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
4065 ParmInfo.pc_cid);
4066 }
4067 }
4068
4069 if (Actual != Expected) {
4070 if (ThreadPriorityVerbose) {
4071 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
4072 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
4073 }
4074 }
4075 #endif
4076
4077 return 0;
4078 }
4079
4080 // Solaris only gives access to 128 real priorities at a time,
4081 // so we expand Java's ten to fill this range. This would be better
4082 // if we dynamically adjusted relative priorities.
4083 //
4084 // The ThreadPriorityPolicy option allows us to select 2 different
4085 // priority scales.
4086 //
4087 // ThreadPriorityPolicy=0
4088 // Since the Solaris' default priority is MaximumPriority, we do not
4089 // set a priority lower than Max unless a priority lower than
4090 // NormPriority is requested.
4091 //
4092 // ThreadPriorityPolicy=1
4093 // This mode causes the priority table to get filled with
4094 // linear values. NormPriority get's mapped to 50% of the
4095 // Maximum priority an so on. This will cause VM threads
4096 // to get unfair treatment against other Solaris processes
4097 // which do not explicitly alter their thread priorities.
4098 //
4099
4100 int os::java_to_os_priority[CriticalPriority + 1] = {
4101 -99999, // 0 Entry should never be used
4102
4103 0, // 1 MinPriority
4104 32, // 2
4105 64, // 3
4106
4107 96, // 4
4108 127, // 5 NormPriority
4109 127, // 6
4110
4111 127, // 7
4112 127, // 8
4113 127, // 9 NearMaxPriority
4114
4115 127, // 10 MaxPriority
4116
4117 -criticalPrio // 11 CriticalPriority
4118 };
4119
4120 OSReturn os::set_native_priority(Thread* thread, int newpri) {
4121 OSThread* osthread = thread->osthread();
4122
4123 // Save requested priority in case the thread hasn't been started
4124 osthread->set_native_priority(newpri);
4125
4126 // Check for critical priority request
4127 bool fxcritical = false;
4128 if (newpri == -criticalPrio) {
4129 fxcritical = true;
4130 newpri = criticalPrio;
4131 }
4132
4133 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
4134 if (!UseThreadPriorities) return OS_OK;
4135
4136 int status = 0;
4137
4138 if (!fxcritical) {
4139 // Use thr_setprio only if we have a priority that thr_setprio understands
4140 status = thr_setprio(thread->osthread()->thread_id(), newpri);
4141 }
4142
4143 if (os::Solaris::T2_libthread() ||
4144 (UseBoundThreads && osthread->is_vm_created())) {
4145 int lwp_status =
4146 set_lwp_class_and_priority(osthread->thread_id(),
4147 osthread->lwp_id(),
4148 newpri,
4149 fxcritical ? fxLimits.schedPolicy : myClass,
4150 !fxcritical);
4151 if (lwp_status != 0 && fxcritical) {
4152 // Try again, this time without changing the scheduling class
4153 newpri = java_MaxPriority_to_os_priority;
4154 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
4155 osthread->lwp_id(),
4156 newpri, myClass, false);
4157 }
4158 status |= lwp_status;
4159 }
4160 return (status == 0) ? OS_OK : OS_ERR;
4161 }
4162
4163
4164 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
4165 int p;
4166 if ( !UseThreadPriorities ) {
4167 *priority_ptr = NormalPriority;
4168 return OS_OK;
4169 }
4170 int status = thr_getprio(thread->osthread()->thread_id(), &p);
4171 if (status != 0) {
4172 return OS_ERR;
4173 }
4174 *priority_ptr = p;
4175 return OS_OK;
4176 }
4177
4178
4179 // Hint to the underlying OS that a task switch would not be good.
4180 // Void return because it's a hint and can fail.
4181 void os::hint_no_preempt() {
4182 schedctl_start(schedctl_init());
4183 }
4184
4185 void os::interrupt(Thread* thread) {
4186 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4187
4188 OSThread* osthread = thread->osthread();
4189
4190 int isInterrupted = osthread->interrupted();
4191 if (!isInterrupted) {
4192 osthread->set_interrupted(true);
4193 OrderAccess::fence();
4194 // os::sleep() is implemented with either poll (NULL,0,timeout) or
4195 // by parking on _SleepEvent. If the former, thr_kill will unwedge
4196 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper.
4197 ParkEvent * const slp = thread->_SleepEvent ;
4198 if (slp != NULL) slp->unpark() ;
4199 }
4200
4201 // For JSR166: unpark after setting status but before thr_kill -dl
4202 if (thread->is_Java_thread()) {
4203 ((JavaThread*)thread)->parker()->unpark();
4204 }
4205
4206 // Handle interruptible wait() ...
4207 ParkEvent * const ev = thread->_ParkEvent ;
4208 if (ev != NULL) ev->unpark() ;
4209
4210 // When events are used everywhere for os::sleep, then this thr_kill
4211 // will only be needed if UseVMInterruptibleIO is true.
4212
4213 if (!isInterrupted) {
4214 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt());
4215 assert_status(status == 0, status, "thr_kill");
4216
4217 // Bump thread interruption counter
4218 RuntimeService::record_thread_interrupt_signaled_count();
4219 }
4220 }
4221
4222
4223 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
4224 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4225
4226 OSThread* osthread = thread->osthread();
4227
4228 bool res = osthread->interrupted();
4229
4230 // NOTE that since there is no "lock" around these two operations,
4231 // there is the possibility that the interrupted flag will be
4232 // "false" but that the interrupt event will be set. This is
4233 // intentional. The effect of this is that Object.wait() will appear
4234 // to have a spurious wakeup, which is not harmful, and the
4235 // possibility is so rare that it is not worth the added complexity
4236 // to add yet another lock. It has also been recommended not to put
4237 // the interrupted flag into the os::Solaris::Event structure,
4238 // because it hides the issue.
4239 if (res && clear_interrupted) {
4240 osthread->set_interrupted(false);
4241 }
4242 return res;
4243 }
4244
4245
4246 void os::print_statistics() {
4247 }
4248
4249 int os::message_box(const char* title, const char* message) {
4250 int i;
4251 fdStream err(defaultStream::error_fd());
4252 for (i = 0; i < 78; i++) err.print_raw("=");
4253 err.cr();
4254 err.print_raw_cr(title);
4255 for (i = 0; i < 78; i++) err.print_raw("-");
4256 err.cr();
4257 err.print_raw_cr(message);
4258 for (i = 0; i < 78; i++) err.print_raw("=");
4259 err.cr();
4260
4261 char buf[16];
4262 // Prevent process from exiting upon "read error" without consuming all CPU
4263 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
4264
4265 return buf[0] == 'y' || buf[0] == 'Y';
4266 }
4267
4268 // A lightweight implementation that does not suspend the target thread and
4269 // thus returns only a hint. Used for profiling only!
4270 ExtendedPC os::get_thread_pc(Thread* thread) {
4271 // Make sure that it is called by the watcher and the Threads lock is owned.
4272 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
4273 // For now, is only used to profile the VM Thread
4274 assert(thread->is_VM_thread(), "Can only be called for VMThread");
4275 ExtendedPC epc;
4276
4277 GetThreadPC_Callback cb(ProfileVM_lock);
4278 OSThread *osthread = thread->osthread();
4279 const int time_to_wait = 400; // 400ms wait for initial response
4280 int status = cb.interrupt(thread, time_to_wait);
4281
4282 if (cb.is_done() ) {
4283 epc = cb.addr();
4284 } else {
4285 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status",
4286 osthread->thread_id(), status););
4287 // epc is already NULL
4288 }
4289 return epc;
4290 }
4291
4292
4293 // This does not do anything on Solaris. This is basically a hook for being
4294 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
4295 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
4296 f(value, method, args, thread);
4297 }
4298
4299 // This routine may be used by user applications as a "hook" to catch signals.
4300 // The user-defined signal handler must pass unrecognized signals to this
4301 // routine, and if it returns true (non-zero), then the signal handler must
4302 // return immediately. If the flag "abort_if_unrecognized" is true, then this
4303 // routine will never retun false (zero), but instead will execute a VM panic
4304 // routine kill the process.
4305 //
4306 // If this routine returns false, it is OK to call it again. This allows
4307 // the user-defined signal handler to perform checks either before or after
4308 // the VM performs its own checks. Naturally, the user code would be making
4309 // a serious error if it tried to handle an exception (such as a null check
4310 // or breakpoint) that the VM was generating for its own correct operation.
4311 //
4312 // This routine may recognize any of the following kinds of signals:
4313 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
4314 // os::Solaris::SIGasync
4315 // It should be consulted by handlers for any of those signals.
4316 // It explicitly does not recognize os::Solaris::SIGinterrupt
4317 //
4318 // The caller of this routine must pass in the three arguments supplied
4319 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
4320 // field of the structure passed to sigaction(). This routine assumes that
4321 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
4322 //
4323 // Note that the VM will print warnings if it detects conflicting signal
4324 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
4325 //
4326 extern "C" JNIEXPORT int
4327 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext,
4328 int abort_if_unrecognized);
4329
4330
4331 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
4332 int orig_errno = errno; // Preserve errno value over signal handler.
4333 JVM_handle_solaris_signal(sig, info, ucVoid, true);
4334 errno = orig_errno;
4335 }
4336
4337 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
4338 is needed to provoke threads blocked on IO to return an EINTR
4339 Note: this explicitly does NOT call JVM_handle_solaris_signal and
4340 does NOT participate in signal chaining due to requirement for
4341 NOT setting SA_RESTART to make EINTR work. */
4342 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
4343 if (UseSignalChaining) {
4344 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
4345 if (actp && actp->sa_handler) {
4346 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
4347 }
4348 }
4349 }
4350
4351 // This boolean allows users to forward their own non-matching signals
4352 // to JVM_handle_solaris_signal, harmlessly.
4353 bool os::Solaris::signal_handlers_are_installed = false;
4354
4355 // For signal-chaining
4356 bool os::Solaris::libjsig_is_loaded = false;
4357 typedef struct sigaction *(*get_signal_t)(int);
4358 get_signal_t os::Solaris::get_signal_action = NULL;
4359
4360 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
4361 struct sigaction *actp = NULL;
4362
4363 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
4364 // Retrieve the old signal handler from libjsig
4365 actp = (*get_signal_action)(sig);
4366 }
4367 if (actp == NULL) {
4368 // Retrieve the preinstalled signal handler from jvm
4369 actp = get_preinstalled_handler(sig);
4370 }
4371
4372 return actp;
4373 }
4374
4375 static bool call_chained_handler(struct sigaction *actp, int sig,
4376 siginfo_t *siginfo, void *context) {
4377 // Call the old signal handler
4378 if (actp->sa_handler == SIG_DFL) {
4379 // It's more reasonable to let jvm treat it as an unexpected exception
4380 // instead of taking the default action.
4381 return false;
4382 } else if (actp->sa_handler != SIG_IGN) {
4383 if ((actp->sa_flags & SA_NODEFER) == 0) {
4384 // automaticlly block the signal
4385 sigaddset(&(actp->sa_mask), sig);
4386 }
4387
4388 sa_handler_t hand;
4389 sa_sigaction_t sa;
4390 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4391 // retrieve the chained handler
4392 if (siginfo_flag_set) {
4393 sa = actp->sa_sigaction;
4394 } else {
4395 hand = actp->sa_handler;
4396 }
4397
4398 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4399 actp->sa_handler = SIG_DFL;
4400 }
4401
4402 // try to honor the signal mask
4403 sigset_t oset;
4404 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4405
4406 // call into the chained handler
4407 if (siginfo_flag_set) {
4408 (*sa)(sig, siginfo, context);
4409 } else {
4410 (*hand)(sig);
4411 }
4412
4413 // restore the signal mask
4414 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4415 }
4416 // Tell jvm's signal handler the signal is taken care of.
4417 return true;
4418 }
4419
4420 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4421 bool chained = false;
4422 // signal-chaining
4423 if (UseSignalChaining) {
4424 struct sigaction *actp = get_chained_signal_action(sig);
4425 if (actp != NULL) {
4426 chained = call_chained_handler(actp, sig, siginfo, context);
4427 }
4428 }
4429 return chained;
4430 }
4431
4432 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4433 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4434 if (preinstalled_sigs[sig] != 0) {
4435 return &chainedsigactions[sig];
4436 }
4437 return NULL;
4438 }
4439
4440 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
4441
4442 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4443 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4444 chainedsigactions[sig] = oldAct;
4445 preinstalled_sigs[sig] = 1;
4446 }
4447
4448 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
4449 // Check for overwrite.
4450 struct sigaction oldAct;
4451 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4452 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4453 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4454 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4455 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4456 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4457 if (AllowUserSignalHandlers || !set_installed) {
4458 // Do not overwrite; user takes responsibility to forward to us.
4459 return;
4460 } else if (UseSignalChaining) {
4461 if (oktochain) {
4462 // save the old handler in jvm
4463 save_preinstalled_handler(sig, oldAct);
4464 } else {
4465 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4466 }
4467 // libjsig also interposes the sigaction() call below and saves the
4468 // old sigaction on it own.
4469 } else {
4470 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4471 "%#lx for signal %d.", (long)oldhand, sig));
4472 }
4473 }
4474
4475 struct sigaction sigAct;
4476 sigfillset(&(sigAct.sa_mask));
4477 sigAct.sa_handler = SIG_DFL;
4478
4479 sigAct.sa_sigaction = signalHandler;
4480 // Handle SIGSEGV on alternate signal stack if
4481 // not using stack banging
4482 if (!UseStackBanging && sig == SIGSEGV) {
4483 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4484 // Interruptible i/o requires SA_RESTART cleared so EINTR
4485 // is returned instead of restarting system calls
4486 } else if (sig == os::Solaris::SIGinterrupt()) {
4487 sigemptyset(&sigAct.sa_mask);
4488 sigAct.sa_handler = NULL;
4489 sigAct.sa_flags = SA_SIGINFO;
4490 sigAct.sa_sigaction = sigINTRHandler;
4491 } else {
4492 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4493 }
4494 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4495
4496 sigaction(sig, &sigAct, &oldAct);
4497
4498 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4499 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4500 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4501 }
4502
4503
4504 #define DO_SIGNAL_CHECK(sig) \
4505 if (!sigismember(&check_signal_done, sig)) \
4506 os::Solaris::check_signal_handler(sig)
4507
4508 // This method is a periodic task to check for misbehaving JNI applications
4509 // under CheckJNI, we can add any periodic checks here
4510
4511 void os::run_periodic_checks() {
4512 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4513 // thereby preventing a NULL checks.
4514 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
4515
4516 if (check_signals == false) return;
4517
4518 // SEGV and BUS if overridden could potentially prevent
4519 // generation of hs*.log in the event of a crash, debugging
4520 // such a case can be very challenging, so we absolutely
4521 // check for the following for a good measure:
4522 DO_SIGNAL_CHECK(SIGSEGV);
4523 DO_SIGNAL_CHECK(SIGILL);
4524 DO_SIGNAL_CHECK(SIGFPE);
4525 DO_SIGNAL_CHECK(SIGBUS);
4526 DO_SIGNAL_CHECK(SIGPIPE);
4527 DO_SIGNAL_CHECK(SIGXFSZ);
4528
4529 // ReduceSignalUsage allows the user to override these handlers
4530 // see comments at the very top and jvm_solaris.h
4531 if (!ReduceSignalUsage) {
4532 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4533 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4534 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4535 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4536 }
4537
4538 // See comments above for using JVM1/JVM2 and UseAltSigs
4539 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4540 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4541
4542 }
4543
4544 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4545
4546 static os_sigaction_t os_sigaction = NULL;
4547
4548 void os::Solaris::check_signal_handler(int sig) {
4549 char buf[O_BUFLEN];
4550 address jvmHandler = NULL;
4551
4552 struct sigaction act;
4553 if (os_sigaction == NULL) {
4554 // only trust the default sigaction, in case it has been interposed
4555 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4556 if (os_sigaction == NULL) return;
4557 }
4558
4559 os_sigaction(sig, (struct sigaction*)NULL, &act);
4560
4561 address thisHandler = (act.sa_flags & SA_SIGINFO)
4562 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4563 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
4564
4565
4566 switch(sig) {
4567 case SIGSEGV:
4568 case SIGBUS:
4569 case SIGFPE:
4570 case SIGPIPE:
4571 case SIGXFSZ:
4572 case SIGILL:
4573 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4574 break;
4575
4576 case SHUTDOWN1_SIGNAL:
4577 case SHUTDOWN2_SIGNAL:
4578 case SHUTDOWN3_SIGNAL:
4579 case BREAK_SIGNAL:
4580 jvmHandler = (address)user_handler();
4581 break;
4582
4583 default:
4584 int intrsig = os::Solaris::SIGinterrupt();
4585 int asynsig = os::Solaris::SIGasync();
4586
4587 if (sig == intrsig) {
4588 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4589 } else if (sig == asynsig) {
4590 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4591 } else {
4592 return;
4593 }
4594 break;
4595 }
4596
4597
4598 if (thisHandler != jvmHandler) {
4599 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4600 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4601 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4602 // No need to check this sig any longer
4603 sigaddset(&check_signal_done, sig);
4604 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4605 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4606 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4607 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4608 // No need to check this sig any longer
4609 sigaddset(&check_signal_done, sig);
4610 }
4611
4612 // Print all the signal handler state
4613 if (sigismember(&check_signal_done, sig)) {
4614 print_signal_handlers(tty, buf, O_BUFLEN);
4615 }
4616
4617 }
4618
4619 void os::Solaris::install_signal_handlers() {
4620 bool libjsigdone = false;
4621 signal_handlers_are_installed = true;
4622
4623 // signal-chaining
4624 typedef void (*signal_setting_t)();
4625 signal_setting_t begin_signal_setting = NULL;
4626 signal_setting_t end_signal_setting = NULL;
4627 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4628 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4629 if (begin_signal_setting != NULL) {
4630 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4631 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4632 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4633 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4634 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4635 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4636 libjsig_is_loaded = true;
4637 if (os::Solaris::get_libjsig_version != NULL) {
4638 libjsigversion = (*os::Solaris::get_libjsig_version)();
4639 }
4640 assert(UseSignalChaining, "should enable signal-chaining");
4641 }
4642 if (libjsig_is_loaded) {
4643 // Tell libjsig jvm is setting signal handlers
4644 (*begin_signal_setting)();
4645 }
4646
4647 set_signal_handler(SIGSEGV, true, true);
4648 set_signal_handler(SIGPIPE, true, true);
4649 set_signal_handler(SIGXFSZ, true, true);
4650 set_signal_handler(SIGBUS, true, true);
4651 set_signal_handler(SIGILL, true, true);
4652 set_signal_handler(SIGFPE, true, true);
4653
4654
4655 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4656
4657 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4658 // can not register overridable signals which might be > 32
4659 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4660 // Tell libjsig jvm has finished setting signal handlers
4661 (*end_signal_setting)();
4662 libjsigdone = true;
4663 }
4664 }
4665
4666 // Never ok to chain our SIGinterrupt
4667 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4668 set_signal_handler(os::Solaris::SIGasync(), true, true);
4669
4670 if (libjsig_is_loaded && !libjsigdone) {
4671 // Tell libjsig jvm finishes setting signal handlers
4672 (*end_signal_setting)();
4673 }
4674
4675 // We don't activate signal checker if libjsig is in place, we trust ourselves
4676 // and if UserSignalHandler is installed all bets are off.
4677 // Log that signal checking is off only if -verbose:jni is specified.
4678 if (CheckJNICalls) {
4679 if (libjsig_is_loaded) {
4680 if (PrintJNIResolving) {
4681 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4682 }
4683 check_signals = false;
4684 }
4685 if (AllowUserSignalHandlers) {
4686 if (PrintJNIResolving) {
4687 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4688 }
4689 check_signals = false;
4690 }
4691 }
4692 }
4693
4694
4695 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
4696
4697 const char * signames[] = {
4698 "SIG0",
4699 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4700 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4701 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4702 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4703 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4704 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4705 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4706 "SIGCANCEL", "SIGLOST"
4707 };
4708
4709 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4710 if (0 < exception_code && exception_code <= SIGRTMAX) {
4711 // signal
4712 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4713 jio_snprintf(buf, size, "%s", signames[exception_code]);
4714 } else {
4715 jio_snprintf(buf, size, "SIG%d", exception_code);
4716 }
4717 return buf;
4718 } else {
4719 return NULL;
4720 }
4721 }
4722
4723 // (Static) wrappers for the new libthread API
4724 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
4725 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
4726 int_fnP_thread_t_i os::Solaris::_thr_setmutator;
4727 int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
4728 int_fnP_thread_t os::Solaris::_thr_continue_mutator;
4729
4730 // (Static) wrapper for getisax(2) call.
4731 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4732
4733 // (Static) wrappers for the liblgrp API
4734 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4735 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4736 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4737 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4738 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4739 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4740 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4741 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4742 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4743
4744 // (Static) wrapper for meminfo() call.
4745 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4746
4747 static address resolve_symbol_lazy(const char* name) {
4748 address addr = (address) dlsym(RTLD_DEFAULT, name);
4749 if(addr == NULL) {
4750 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4751 addr = (address) dlsym(RTLD_NEXT, name);
4752 }
4753 return addr;
4754 }
4755
4756 static address resolve_symbol(const char* name) {
4757 address addr = resolve_symbol_lazy(name);
4758 if(addr == NULL) {
4759 fatal(dlerror());
4760 }
4761 return addr;
4762 }
4763
4764
4765
4766 // isT2_libthread()
4767 //
4768 // Routine to determine if we are currently using the new T2 libthread.
4769 //
4770 // We determine if we are using T2 by reading /proc/self/lstatus and
4771 // looking for a thread with the ASLWP bit set. If we find this status
4772 // bit set, we must assume that we are NOT using T2. The T2 team
4773 // has approved this algorithm.
4774 //
4775 // We need to determine if we are running with the new T2 libthread
4776 // since setting native thread priorities is handled differently
4777 // when using this library. All threads created using T2 are bound
4778 // threads. Calling thr_setprio is meaningless in this case.
4779 //
4780 bool isT2_libthread() {
4781 static prheader_t * lwpArray = NULL;
4782 static int lwpSize = 0;
4783 static int lwpFile = -1;
4784 lwpstatus_t * that;
4785 char lwpName [128];
4786 bool isT2 = false;
4787
4788 #define ADR(x) ((uintptr_t)(x))
4789 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
4790
4791 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0);
4792 if (lwpFile < 0) {
4793 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n");
4794 return false;
4795 }
4796 lwpSize = 16*1024;
4797 for (;;) {
4798 ::lseek64 (lwpFile, 0, SEEK_SET);
4799 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize, mtInternal);
4800 if (::read(lwpFile, lwpArray, lwpSize) < 0) {
4801 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n");
4802 break;
4803 }
4804 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
4805 // We got a good snapshot - now iterate over the list.
4806 int aslwpcount = 0;
4807 for (int i = 0; i < lwpArray->pr_nent; i++ ) {
4808 that = LWPINDEX(lwpArray,i);
4809 if (that->pr_flags & PR_ASLWP) {
4810 aslwpcount++;
4811 }
4812 }
4813 if (aslwpcount == 0) isT2 = true;
4814 break;
4815 }
4816 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
4817 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); // retry.
4818 }
4819
4820 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal);
4821 ::close (lwpFile);
4822 if (ThreadPriorityVerbose) {
4823 if (isT2) tty->print_cr("We are running with a T2 libthread\n");
4824 else tty->print_cr("We are not running with a T2 libthread\n");
4825 }
4826 return isT2;
4827 }
4828
4829
4830 void os::Solaris::libthread_init() {
4831 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4832
4833 // Determine if we are running with the new T2 libthread
4834 os::Solaris::set_T2_libthread(isT2_libthread());
4835
4836 lwp_priocntl_init();
4837
4838 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4839 if(func == NULL) {
4840 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4841 // Guarantee that this VM is running on an new enough OS (5.6 or
4842 // later) that it will have a new enough libthread.so.
4843 guarantee(func != NULL, "libthread.so is too old.");
4844 }
4845
4846 // Initialize the new libthread getstate API wrappers
4847 func = resolve_symbol("thr_getstate");
4848 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
4849
4850 func = resolve_symbol("thr_setstate");
4851 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
4852
4853 func = resolve_symbol("thr_setmutator");
4854 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
4855
4856 func = resolve_symbol("thr_suspend_mutator");
4857 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4858
4859 func = resolve_symbol("thr_continue_mutator");
4860 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4861
4862 int size;
4863 void (*handler_info_func)(address *, int *);
4864 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4865 handler_info_func(&handler_start, &size);
4866 handler_end = handler_start + size;
4867 }
4868
4869
4870 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4871 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4872 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4873 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4874 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4875 int os::Solaris::_mutex_scope = USYNC_THREAD;
4876
4877 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4878 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4879 int_fnP_cond_tP os::Solaris::_cond_signal;
4880 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4881 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4882 int_fnP_cond_tP os::Solaris::_cond_destroy;
4883 int os::Solaris::_cond_scope = USYNC_THREAD;
4884
4885 void os::Solaris::synchronization_init() {
4886 if(UseLWPSynchronization) {
4887 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4888 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4889 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4890 os::Solaris::set_mutex_init(lwp_mutex_init);
4891 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4892 os::Solaris::set_mutex_scope(USYNC_THREAD);
4893
4894 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4895 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4896 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4897 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4898 os::Solaris::set_cond_init(lwp_cond_init);
4899 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4900 os::Solaris::set_cond_scope(USYNC_THREAD);
4901 }
4902 else {
4903 os::Solaris::set_mutex_scope(USYNC_THREAD);
4904 os::Solaris::set_cond_scope(USYNC_THREAD);
4905
4906 if(UsePthreads) {
4907 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4908 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4909 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4910 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4911 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4912
4913 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4914 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4915 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4916 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4917 os::Solaris::set_cond_init(pthread_cond_default_init);
4918 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4919 }
4920 else {
4921 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4922 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4923 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4924 os::Solaris::set_mutex_init(::mutex_init);
4925 os::Solaris::set_mutex_destroy(::mutex_destroy);
4926
4927 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4928 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4929 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4930 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4931 os::Solaris::set_cond_init(::cond_init);
4932 os::Solaris::set_cond_destroy(::cond_destroy);
4933 }
4934 }
4935 }
4936
4937 bool os::Solaris::liblgrp_init() {
4938 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4939 if (handle != NULL) {
4940 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4941 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4942 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4943 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4944 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4945 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4946 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4947 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4948 dlsym(handle, "lgrp_cookie_stale")));
4949
4950 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4951 set_lgrp_cookie(c);
4952 return true;
4953 }
4954 return false;
4955 }
4956
4957 void os::Solaris::misc_sym_init() {
4958 address func;
4959
4960 // getisax
4961 func = resolve_symbol_lazy("getisax");
4962 if (func != NULL) {
4963 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4964 }
4965
4966 // meminfo
4967 func = resolve_symbol_lazy("meminfo");
4968 if (func != NULL) {
4969 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4970 }
4971 }
4972
4973 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4974 assert(_getisax != NULL, "_getisax not set");
4975 return _getisax(array, n);
4976 }
4977
4978 // Symbol doesn't exist in Solaris 8 pset.h
4979 #ifndef PS_MYID
4980 #define PS_MYID -3
4981 #endif
4982
4983 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4984 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4985 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4986
4987 void init_pset_getloadavg_ptr(void) {
4988 pset_getloadavg_ptr =
4989 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4990 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4991 warning("pset_getloadavg function not found");
4992 }
4993 }
4994
4995 int os::Solaris::_dev_zero_fd = -1;
4996
4997 // this is called _before_ the global arguments have been parsed
4998 void os::init(void) {
4999 _initial_pid = getpid();
5000
5001 max_hrtime = first_hrtime = gethrtime();
5002
5003 init_random(1234567);
5004
5005 page_size = sysconf(_SC_PAGESIZE);
5006 if (page_size == -1)
5007 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
5008 strerror(errno)));
5009 init_page_sizes((size_t) page_size);
5010
5011 Solaris::initialize_system_info();
5012
5013 // Initialize misc. symbols as soon as possible, so we can use them
5014 // if we need them.
5015 Solaris::misc_sym_init();
5016
5017 int fd = ::open("/dev/zero", O_RDWR);
5018 if (fd < 0) {
5019 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
5020 } else {
5021 Solaris::set_dev_zero_fd(fd);
5022
5023 // Close on exec, child won't inherit.
5024 fcntl(fd, F_SETFD, FD_CLOEXEC);
5025 }
5026
5027 clock_tics_per_sec = CLK_TCK;
5028
5029 // check if dladdr1() exists; dladdr1 can provide more information than
5030 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
5031 // and is available on linker patches for 5.7 and 5.8.
5032 // libdl.so must have been loaded, this call is just an entry lookup
5033 void * hdl = dlopen("libdl.so", RTLD_NOW);
5034 if (hdl)
5035 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
5036
5037 // (Solaris only) this switches to calls that actually do locking.
5038 ThreadCritical::initialize();
5039
5040 main_thread = thr_self();
5041
5042 // Constant minimum stack size allowed. It must be at least
5043 // the minimum of what the OS supports (thr_min_stack()), and
5044 // enough to allow the thread to get to user bytecode execution.
5045 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
5046 // If the pagesize of the VM is greater than 8K determine the appropriate
5047 // number of initial guard pages. The user can change this with the
5048 // command line arguments, if needed.
5049 if (vm_page_size() > 8*K) {
5050 StackYellowPages = 1;
5051 StackRedPages = 1;
5052 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
5053 }
5054 }
5055
5056 // To install functions for atexit system call
5057 extern "C" {
5058 static void perfMemory_exit_helper() {
5059 perfMemory_exit();
5060 }
5061 }
5062
5063 // this is called _after_ the global arguments have been parsed
5064 jint os::init_2(void) {
5065 // try to enable extended file IO ASAP, see 6431278
5066 os::Solaris::try_enable_extended_io();
5067
5068 // Allocate a single page and mark it as readable for safepoint polling. Also
5069 // use this first mmap call to check support for MAP_ALIGN.
5070 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
5071 page_size,
5072 MAP_PRIVATE | MAP_ALIGN,
5073 PROT_READ);
5074 if (polling_page == NULL) {
5075 has_map_align = false;
5076 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
5077 PROT_READ);
5078 }
5079
5080 os::set_polling_page(polling_page);
5081
5082 #ifndef PRODUCT
5083 if( Verbose && PrintMiscellaneous )
5084 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
5085 #endif
5086
5087 if (!UseMembar) {
5088 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
5089 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
5090 os::set_memory_serialize_page( mem_serialize_page );
5091
5092 #ifndef PRODUCT
5093 if(Verbose && PrintMiscellaneous)
5094 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
5095 #endif
5096 }
5097
5098 os::large_page_init();
5099
5100 // Check minimum allowable stack size for thread creation and to initialize
5101 // the java system classes, including StackOverflowError - depends on page
5102 // size. Add a page for compiler2 recursion in main thread.
5103 // Add in 2*BytesPerWord times page size to account for VM stack during
5104 // class initialization depending on 32 or 64 bit VM.
5105 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
5106 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
5107 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
5108
5109 size_t threadStackSizeInBytes = ThreadStackSize * K;
5110 if (threadStackSizeInBytes != 0 &&
5111 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
5112 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
5113 os::Solaris::min_stack_allowed/K);
5114 return JNI_ERR;
5115 }
5116
5117 // For 64kbps there will be a 64kb page size, which makes
5118 // the usable default stack size quite a bit less. Increase the
5119 // stack for 64kb (or any > than 8kb) pages, this increases
5120 // virtual memory fragmentation (since we're not creating the
5121 // stack on a power of 2 boundary. The real fix for this
5122 // should be to fix the guard page mechanism.
5123
5124 if (vm_page_size() > 8*K) {
5125 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
5126 ? threadStackSizeInBytes +
5127 ((StackYellowPages + StackRedPages) * vm_page_size())
5128 : 0;
5129 ThreadStackSize = threadStackSizeInBytes/K;
5130 }
5131
5132 // Make the stack size a multiple of the page size so that
5133 // the yellow/red zones can be guarded.
5134 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
5135 vm_page_size()));
5136
5137 Solaris::libthread_init();
5138
5139 if (UseNUMA) {
5140 if (!Solaris::liblgrp_init()) {
5141 UseNUMA = false;
5142 } else {
5143 size_t lgrp_limit = os::numa_get_groups_num();
5144 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
5145 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
5146 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal);
5147 if (lgrp_num < 2) {
5148 // There's only one locality group, disable NUMA.
5149 UseNUMA = false;
5150 }
5151 }
5152 // ISM is not compatible with the NUMA allocator - it always allocates
5153 // pages round-robin across the lgroups.
5154 if (UseNUMA && UseLargePages && UseISM) {
5155 if (!FLAG_IS_DEFAULT(UseNUMA)) {
5156 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) {
5157 UseLargePages = false;
5158 } else {
5159 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator");
5160 UseNUMA = false;
5161 }
5162 } else {
5163 UseNUMA = false;
5164 }
5165 }
5166 if (!UseNUMA && ForceNUMA) {
5167 UseNUMA = true;
5168 }
5169 }
5170
5171 Solaris::signal_sets_init();
5172 Solaris::init_signal_mem();
5173 Solaris::install_signal_handlers();
5174
5175 if (libjsigversion < JSIG_VERSION_1_4_1) {
5176 Maxlibjsigsigs = OLDMAXSIGNUM;
5177 }
5178
5179 // initialize synchronization primitives to use either thread or
5180 // lwp synchronization (controlled by UseLWPSynchronization)
5181 Solaris::synchronization_init();
5182
5183 if (MaxFDLimit) {
5184 // set the number of file descriptors to max. print out error
5185 // if getrlimit/setrlimit fails but continue regardless.
5186 struct rlimit nbr_files;
5187 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
5188 if (status != 0) {
5189 if (PrintMiscellaneous && (Verbose || WizardMode))
5190 perror("os::init_2 getrlimit failed");
5191 } else {
5192 nbr_files.rlim_cur = nbr_files.rlim_max;
5193 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
5194 if (status != 0) {
5195 if (PrintMiscellaneous && (Verbose || WizardMode))
5196 perror("os::init_2 setrlimit failed");
5197 }
5198 }
5199 }
5200
5201 // Calculate theoretical max. size of Threads to guard gainst
5202 // artifical out-of-memory situations, where all available address-
5203 // space has been reserved by thread stacks. Default stack size is 1Mb.
5204 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
5205 JavaThread::stack_size_at_create() : (1*K*K);
5206 assert(pre_thread_stack_size != 0, "Must have a stack");
5207 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
5208 // we should start doing Virtual Memory banging. Currently when the threads will
5209 // have used all but 200Mb of space.
5210 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
5211 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
5212
5213 // at-exit methods are called in the reverse order of their registration.
5214 // In Solaris 7 and earlier, atexit functions are called on return from
5215 // main or as a result of a call to exit(3C). There can be only 32 of
5216 // these functions registered and atexit() does not set errno. In Solaris
5217 // 8 and later, there is no limit to the number of functions registered
5218 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
5219 // functions are called upon dlclose(3DL) in addition to return from main
5220 // and exit(3C).
5221
5222 if (PerfAllowAtExitRegistration) {
5223 // only register atexit functions if PerfAllowAtExitRegistration is set.
5224 // atexit functions can be delayed until process exit time, which
5225 // can be problematic for embedded VM situations. Embedded VMs should
5226 // call DestroyJavaVM() to assure that VM resources are released.
5227
5228 // note: perfMemory_exit_helper atexit function may be removed in
5229 // the future if the appropriate cleanup code can be added to the
5230 // VM_Exit VMOperation's doit method.
5231 if (atexit(perfMemory_exit_helper) != 0) {
5232 warning("os::init2 atexit(perfMemory_exit_helper) failed");
5233 }
5234 }
5235
5236 // Init pset_loadavg function pointer
5237 init_pset_getloadavg_ptr();
5238
5239 return JNI_OK;
5240 }
5241
5242 void os::init_3(void) {
5243 return;
5244 }
5245
5246 // Mark the polling page as unreadable
5247 void os::make_polling_page_unreadable(void) {
5248 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
5249 fatal("Could not disable polling page");
5250 };
5251
5252 // Mark the polling page as readable
5253 void os::make_polling_page_readable(void) {
5254 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
5255 fatal("Could not enable polling page");
5256 };
5257
5258 // OS interface.
5259
5260 bool os::check_heap(bool force) { return true; }
5261
5262 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
5263 static vsnprintf_t sol_vsnprintf = NULL;
5264
5265 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
5266 if (!sol_vsnprintf) {
5267 //search for the named symbol in the objects that were loaded after libjvm
5268 void* where = RTLD_NEXT;
5269 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5270 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5271 if (!sol_vsnprintf){
5272 //search for the named symbol in the objects that were loaded before libjvm
5273 where = RTLD_DEFAULT;
5274 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5275 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5276 assert(sol_vsnprintf != NULL, "vsnprintf not found");
5277 }
5278 }
5279 return (*sol_vsnprintf)(buf, count, fmt, argptr);
5280 }
5281
5282
5283 // Is a (classpath) directory empty?
5284 bool os::dir_is_empty(const char* path) {
5285 DIR *dir = NULL;
5286 struct dirent *ptr;
5287
5288 dir = opendir(path);
5289 if (dir == NULL) return true;
5290
5291 /* Scan the directory */
5292 bool result = true;
5293 char buf[sizeof(struct dirent) + MAX_PATH];
5294 struct dirent *dbuf = (struct dirent *) buf;
5295 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
5296 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
5297 result = false;
5298 }
5299 }
5300 closedir(dir);
5301 return result;
5302 }
5303
5304 // This code originates from JDK's sysOpen and open64_w
5305 // from src/solaris/hpi/src/system_md.c
5306
5307 #ifndef O_DELETE
5308 #define O_DELETE 0x10000
5309 #endif
5310
5311 // Open a file. Unlink the file immediately after open returns
5312 // if the specified oflag has the O_DELETE flag set.
5313 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
5314
5315 int os::open(const char *path, int oflag, int mode) {
5316 if (strlen(path) > MAX_PATH - 1) {
5317 errno = ENAMETOOLONG;
5318 return -1;
5319 }
5320 int fd;
5321 int o_delete = (oflag & O_DELETE);
5322 oflag = oflag & ~O_DELETE;
5323
5324 fd = ::open64(path, oflag, mode);
5325 if (fd == -1) return -1;
5326
5327 //If the open succeeded, the file might still be a directory
5328 {
5329 struct stat64 buf64;
5330 int ret = ::fstat64(fd, &buf64);
5331 int st_mode = buf64.st_mode;
5332
5333 if (ret != -1) {
5334 if ((st_mode & S_IFMT) == S_IFDIR) {
5335 errno = EISDIR;
5336 ::close(fd);
5337 return -1;
5338 }
5339 } else {
5340 ::close(fd);
5341 return -1;
5342 }
5343 }
5344 /*
5345 * 32-bit Solaris systems suffer from:
5346 *
5347 * - an historical default soft limit of 256 per-process file
5348 * descriptors that is too low for many Java programs.
5349 *
5350 * - a design flaw where file descriptors created using stdio
5351 * fopen must be less than 256, _even_ when the first limit above
5352 * has been raised. This can cause calls to fopen (but not calls to
5353 * open, for example) to fail mysteriously, perhaps in 3rd party
5354 * native code (although the JDK itself uses fopen). One can hardly
5355 * criticize them for using this most standard of all functions.
5356 *
5357 * We attempt to make everything work anyways by:
5358 *
5359 * - raising the soft limit on per-process file descriptors beyond
5360 * 256
5361 *
5362 * - As of Solaris 10u4, we can request that Solaris raise the 256
5363 * stdio fopen limit by calling function enable_extended_FILE_stdio.
5364 * This is done in init_2 and recorded in enabled_extended_FILE_stdio
5365 *
5366 * - If we are stuck on an old (pre 10u4) Solaris system, we can
5367 * workaround the bug by remapping non-stdio file descriptors below
5368 * 256 to ones beyond 256, which is done below.
5369 *
5370 * See:
5371 * 1085341: 32-bit stdio routines should support file descriptors >255
5372 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files
5373 * 6431278: Netbeans crash on 32 bit Solaris: need to call
5374 * enable_extended_FILE_stdio() in VM initialisation
5375 * Giri Mandalika's blog
5376 * http://technopark02.blogspot.com/2005_05_01_archive.html
5377 */
5378 #ifndef _LP64
5379 if ((!enabled_extended_FILE_stdio) && fd < 256) {
5380 int newfd = ::fcntl(fd, F_DUPFD, 256);
5381 if (newfd != -1) {
5382 ::close(fd);
5383 fd = newfd;
5384 }
5385 }
5386 #endif // 32-bit Solaris
5387 /*
5388 * All file descriptors that are opened in the JVM and not
5389 * specifically destined for a subprocess should have the
5390 * close-on-exec flag set. If we don't set it, then careless 3rd
5391 * party native code might fork and exec without closing all
5392 * appropriate file descriptors (e.g. as we do in closeDescriptors in
5393 * UNIXProcess.c), and this in turn might:
5394 *
5395 * - cause end-of-file to fail to be detected on some file
5396 * descriptors, resulting in mysterious hangs, or
5397 *
5398 * - might cause an fopen in the subprocess to fail on a system
5399 * suffering from bug 1085341.
5400 *
5401 * (Yes, the default setting of the close-on-exec flag is a Unix
5402 * design flaw)
5403 *
5404 * See:
5405 * 1085341: 32-bit stdio routines should support file descriptors >255
5406 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
5407 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
5408 */
5409 #ifdef FD_CLOEXEC
5410 {
5411 int flags = ::fcntl(fd, F_GETFD);
5412 if (flags != -1)
5413 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
5414 }
5415 #endif
5416
5417 if (o_delete != 0) {
5418 ::unlink(path);
5419 }
5420 return fd;
5421 }
5422
5423 // create binary file, rewriting existing file if required
5424 int os::create_binary_file(const char* path, bool rewrite_existing) {
5425 int oflags = O_WRONLY | O_CREAT;
5426 if (!rewrite_existing) {
5427 oflags |= O_EXCL;
5428 }
5429 return ::open64(path, oflags, S_IREAD | S_IWRITE);
5430 }
5431
5432 // return current position of file pointer
5433 jlong os::current_file_offset(int fd) {
5434 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
5435 }
5436
5437 // move file pointer to the specified offset
5438 jlong os::seek_to_file_offset(int fd, jlong offset) {
5439 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
5440 }
5441
5442 jlong os::lseek(int fd, jlong offset, int whence) {
5443 return (jlong) ::lseek64(fd, offset, whence);
5444 }
5445
5446 char * os::native_path(char *path) {
5447 return path;
5448 }
5449
5450 int os::ftruncate(int fd, jlong length) {
5451 return ::ftruncate64(fd, length);
5452 }
5453
5454 int os::fsync(int fd) {
5455 RESTARTABLE_RETURN_INT(::fsync(fd));
5456 }
5457
5458 int os::available(int fd, jlong *bytes) {
5459 jlong cur, end;
5460 int mode;
5461 struct stat64 buf64;
5462
5463 if (::fstat64(fd, &buf64) >= 0) {
5464 mode = buf64.st_mode;
5465 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
5466 /*
5467 * XXX: is the following call interruptible? If so, this might
5468 * need to go through the INTERRUPT_IO() wrapper as for other
5469 * blocking, interruptible calls in this file.
5470 */
5471 int n,ioctl_return;
5472
5473 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted);
5474 if (ioctl_return>= 0) {
5475 *bytes = n;
5476 return 1;
5477 }
5478 }
5479 }
5480 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
5481 return 0;
5482 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
5483 return 0;
5484 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
5485 return 0;
5486 }
5487 *bytes = end - cur;
5488 return 1;
5489 }
5490
5491 // Map a block of memory.
5492 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
5493 char *addr, size_t bytes, bool read_only,
5494 bool allow_exec) {
5495 int prot;
5496 int flags;
5497
5498 if (read_only) {
5499 prot = PROT_READ;
5500 flags = MAP_SHARED;
5501 } else {
5502 prot = PROT_READ | PROT_WRITE;
5503 flags = MAP_PRIVATE;
5504 }
5505
5506 if (allow_exec) {
5507 prot |= PROT_EXEC;
5508 }
5509
5510 if (addr != NULL) {
5511 flags |= MAP_FIXED;
5512 }
5513
5514 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5515 fd, file_offset);
5516 if (mapped_address == MAP_FAILED) {
5517 return NULL;
5518 }
5519 return mapped_address;
5520 }
5521
5522
5523 // Remap a block of memory.
5524 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5525 char *addr, size_t bytes, bool read_only,
5526 bool allow_exec) {
5527 // same as map_memory() on this OS
5528 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5529 allow_exec);
5530 }
5531
5532
5533 // Unmap a block of memory.
5534 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5535 return munmap(addr, bytes) == 0;
5536 }
5537
5538 void os::pause() {
5539 char filename[MAX_PATH];
5540 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5541 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5542 } else {
5543 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5544 }
5545
5546 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5547 if (fd != -1) {
5548 struct stat buf;
5549 ::close(fd);
5550 while (::stat(filename, &buf) == 0) {
5551 (void)::poll(NULL, 0, 100);
5552 }
5553 } else {
5554 jio_fprintf(stderr,
5555 "Could not open pause file '%s', continuing immediately.\n", filename);
5556 }
5557 }
5558
5559 #ifndef PRODUCT
5560 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5561 // Turn this on if you need to trace synch operations.
5562 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5563 // and call record_synch_enable and record_synch_disable
5564 // around the computation of interest.
5565
5566 void record_synch(char* name, bool returning); // defined below
5567
5568 class RecordSynch {
5569 char* _name;
5570 public:
5571 RecordSynch(char* name) :_name(name)
5572 { record_synch(_name, false); }
5573 ~RecordSynch() { record_synch(_name, true); }
5574 };
5575
5576 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5577 extern "C" ret name params { \
5578 typedef ret name##_t params; \
5579 static name##_t* implem = NULL; \
5580 static int callcount = 0; \
5581 if (implem == NULL) { \
5582 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5583 if (implem == NULL) fatal(dlerror()); \
5584 } \
5585 ++callcount; \
5586 RecordSynch _rs(#name); \
5587 inner; \
5588 return implem args; \
5589 }
5590 // in dbx, examine callcounts this way:
5591 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5592
5593 #define CHECK_POINTER_OK(p) \
5594 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5595 #define CHECK_MU \
5596 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5597 #define CHECK_CV \
5598 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5599 #define CHECK_P(p) \
5600 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5601
5602 #define CHECK_MUTEX(mutex_op) \
5603 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5604
5605 CHECK_MUTEX( mutex_lock)
5606 CHECK_MUTEX( _mutex_lock)
5607 CHECK_MUTEX( mutex_unlock)
5608 CHECK_MUTEX(_mutex_unlock)
5609 CHECK_MUTEX( mutex_trylock)
5610 CHECK_MUTEX(_mutex_trylock)
5611
5612 #define CHECK_COND(cond_op) \
5613 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
5614
5615 CHECK_COND( cond_wait);
5616 CHECK_COND(_cond_wait);
5617 CHECK_COND(_cond_wait_cancel);
5618
5619 #define CHECK_COND2(cond_op) \
5620 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
5621
5622 CHECK_COND2( cond_timedwait);
5623 CHECK_COND2(_cond_timedwait);
5624 CHECK_COND2(_cond_timedwait_cancel);
5625
5626 // do the _lwp_* versions too
5627 #define mutex_t lwp_mutex_t
5628 #define cond_t lwp_cond_t
5629 CHECK_MUTEX( _lwp_mutex_lock)
5630 CHECK_MUTEX( _lwp_mutex_unlock)
5631 CHECK_MUTEX( _lwp_mutex_trylock)
5632 CHECK_MUTEX( __lwp_mutex_lock)
5633 CHECK_MUTEX( __lwp_mutex_unlock)
5634 CHECK_MUTEX( __lwp_mutex_trylock)
5635 CHECK_MUTEX(___lwp_mutex_lock)
5636 CHECK_MUTEX(___lwp_mutex_unlock)
5637
5638 CHECK_COND( _lwp_cond_wait);
5639 CHECK_COND( __lwp_cond_wait);
5640 CHECK_COND(___lwp_cond_wait);
5641
5642 CHECK_COND2( _lwp_cond_timedwait);
5643 CHECK_COND2( __lwp_cond_timedwait);
5644 #undef mutex_t
5645 #undef cond_t
5646
5647 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5648 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5649 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5650 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5651 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5652 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5653 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5654 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5655
5656
5657 // recording machinery:
5658
5659 enum { RECORD_SYNCH_LIMIT = 200 };
5660 char* record_synch_name[RECORD_SYNCH_LIMIT];
5661 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5662 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5663 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5664 int record_synch_count = 0;
5665 bool record_synch_enabled = false;
5666
5667 // in dbx, examine recorded data this way:
5668 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5669
5670 void record_synch(char* name, bool returning) {
5671 if (record_synch_enabled) {
5672 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5673 record_synch_name[record_synch_count] = name;
5674 record_synch_returning[record_synch_count] = returning;
5675 record_synch_thread[record_synch_count] = thr_self();
5676 record_synch_arg0ptr[record_synch_count] = &name;
5677 record_synch_count++;
5678 }
5679 // put more checking code here:
5680 // ...
5681 }
5682 }
5683
5684 void record_synch_enable() {
5685 // start collecting trace data, if not already doing so
5686 if (!record_synch_enabled) record_synch_count = 0;
5687 record_synch_enabled = true;
5688 }
5689
5690 void record_synch_disable() {
5691 // stop collecting trace data
5692 record_synch_enabled = false;
5693 }
5694
5695 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5696 #endif // PRODUCT
5697
5698 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5699 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5700 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5701
5702
5703 // JVMTI & JVM monitoring and management support
5704 // The thread_cpu_time() and current_thread_cpu_time() are only
5705 // supported if is_thread_cpu_time_supported() returns true.
5706 // They are not supported on Solaris T1.
5707
5708 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5709 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5710 // of a thread.
5711 //
5712 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5713 // returns the fast estimate available on the platform.
5714
5715 // hrtime_t gethrvtime() return value includes
5716 // user time but does not include system time
5717 jlong os::current_thread_cpu_time() {
5718 return (jlong) gethrvtime();
5719 }
5720
5721 jlong os::thread_cpu_time(Thread *thread) {
5722 // return user level CPU time only to be consistent with
5723 // what current_thread_cpu_time returns.
5724 // thread_cpu_time_info() must be changed if this changes
5725 return os::thread_cpu_time(thread, false /* user time only */);
5726 }
5727
5728 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5729 if (user_sys_cpu_time) {
5730 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5731 } else {
5732 return os::current_thread_cpu_time();
5733 }
5734 }
5735
5736 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5737 char proc_name[64];
5738 int count;
5739 prusage_t prusage;
5740 jlong lwp_time;
5741 int fd;
5742
5743 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5744 getpid(),
5745 thread->osthread()->lwp_id());
5746 fd = ::open(proc_name, O_RDONLY);
5747 if ( fd == -1 ) return -1;
5748
5749 do {
5750 count = ::pread(fd,
5751 (void *)&prusage.pr_utime,
5752 thr_time_size,
5753 thr_time_off);
5754 } while (count < 0 && errno == EINTR);
5755 ::close(fd);
5756 if ( count < 0 ) return -1;
5757
5758 if (user_sys_cpu_time) {
5759 // user + system CPU time
5760 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5761 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5762 (jlong)prusage.pr_stime.tv_nsec +
5763 (jlong)prusage.pr_utime.tv_nsec;
5764 } else {
5765 // user level CPU time only
5766 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5767 (jlong)prusage.pr_utime.tv_nsec;
5768 }
5769
5770 return(lwp_time);
5771 }
5772
5773 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5774 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5775 info_ptr->may_skip_backward = false; // elapsed time not wall time
5776 info_ptr->may_skip_forward = false; // elapsed time not wall time
5777 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5778 }
5779
5780 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5781 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5782 info_ptr->may_skip_backward = false; // elapsed time not wall time
5783 info_ptr->may_skip_forward = false; // elapsed time not wall time
5784 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5785 }
5786
5787 bool os::is_thread_cpu_time_supported() {
5788 if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
5789 return true;
5790 } else {
5791 return false;
5792 }
5793 }
5794
5795 // System loadavg support. Returns -1 if load average cannot be obtained.
5796 // Return the load average for our processor set if the primitive exists
5797 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5798 int os::loadavg(double loadavg[], int nelem) {
5799 if (pset_getloadavg_ptr != NULL) {
5800 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5801 } else {
5802 return ::getloadavg(loadavg, nelem);
5803 }
5804 }
5805
5806 //---------------------------------------------------------------------------------
5807
5808 static address same_page(address x, address y) {
5809 intptr_t page_bits = -os::vm_page_size();
5810 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
5811 return x;
5812 else if (x > y)
5813 return (address)(intptr_t(y) | ~page_bits) + 1;
5814 else
5815 return (address)(intptr_t(y) & page_bits);
5816 }
5817
5818 bool os::find(address addr, outputStream* st) {
5819 Dl_info dlinfo;
5820 memset(&dlinfo, 0, sizeof(dlinfo));
5821 if (dladdr(addr, &dlinfo)) {
5822 #ifdef _LP64
5823 st->print("0x%016lx: ", addr);
5824 #else
5825 st->print("0x%08x: ", addr);
5826 #endif
5827 if (dlinfo.dli_sname != NULL)
5828 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5829 else if (dlinfo.dli_fname)
5830 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5831 else
5832 st->print("<absolute address>");
5833 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname);
5834 #ifdef _LP64
5835 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase);
5836 #else
5837 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase);
5838 #endif
5839 st->cr();
5840
5841 if (Verbose) {
5842 // decode some bytes around the PC
5843 address begin = same_page(addr-40, addr);
5844 address end = same_page(addr+40, addr);
5845 address lowest = (address) dlinfo.dli_sname;
5846 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5847 if (begin < lowest) begin = lowest;
5848 Dl_info dlinfo2;
5849 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
5850 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
5851 end = (address) dlinfo2.dli_saddr;
5852 Disassembler::decode(begin, end, st);
5853 }
5854 return true;
5855 }
5856 return false;
5857 }
5858
5859 // Following function has been added to support HotSparc's libjvm.so running
5860 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5861 // src/solaris/hpi/native_threads in the EVM codebase.
5862 //
5863 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5864 // libraries and should thus be removed. We will leave it behind for a while
5865 // until we no longer want to able to run on top of 1.3.0 Solaris production
5866 // JDK. See 4341971.
5867
5868 #define STACK_SLACK 0x800
5869
5870 extern "C" {
5871 intptr_t sysThreadAvailableStackWithSlack() {
5872 stack_t st;
5873 intptr_t retval, stack_top;
5874 retval = thr_stksegment(&st);
5875 assert(retval == 0, "incorrect return value from thr_stksegment");
5876 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5877 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5878 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5879 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5880 }
5881 }
5882
5883 // ObjectMonitor park-unpark infrastructure ...
5884 //
5885 // We implement Solaris and Linux PlatformEvents with the
5886 // obvious condvar-mutex-flag triple.
5887 // Another alternative that works quite well is pipes:
5888 // Each PlatformEvent consists of a pipe-pair.
5889 // The thread associated with the PlatformEvent
5890 // calls park(), which reads from the input end of the pipe.
5891 // Unpark() writes into the other end of the pipe.
5892 // The write-side of the pipe must be set NDELAY.
5893 // Unfortunately pipes consume a large # of handles.
5894 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5895 // Using pipes for the 1st few threads might be workable, however.
5896 //
5897 // park() is permitted to return spuriously.
5898 // Callers of park() should wrap the call to park() in
5899 // an appropriate loop. A litmus test for the correct
5900 // usage of park is the following: if park() were modified
5901 // to immediately return 0 your code should still work,
5902 // albeit degenerating to a spin loop.
5903 //
5904 // An interesting optimization for park() is to use a trylock()
5905 // to attempt to acquire the mutex. If the trylock() fails
5906 // then we know that a concurrent unpark() operation is in-progress.
5907 // in that case the park() code could simply set _count to 0
5908 // and return immediately. The subsequent park() operation *might*
5909 // return immediately. That's harmless as the caller of park() is
5910 // expected to loop. By using trylock() we will have avoided a
5911 // avoided a context switch caused by contention on the per-thread mutex.
5912 //
5913 // TODO-FIXME:
5914 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5915 // objectmonitor implementation.
5916 // 2. Collapse the JSR166 parker event, and the
5917 // objectmonitor ParkEvent into a single "Event" construct.
5918 // 3. In park() and unpark() add:
5919 // assert (Thread::current() == AssociatedWith).
5920 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5921 // 1-out-of-N park() operations will return immediately.
5922 //
5923 // _Event transitions in park()
5924 // -1 => -1 : illegal
5925 // 1 => 0 : pass - return immediately
5926 // 0 => -1 : block
5927 //
5928 // _Event serves as a restricted-range semaphore.
5929 //
5930 // Another possible encoding of _Event would be with
5931 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5932 //
5933 // TODO-FIXME: add DTRACE probes for:
5934 // 1. Tx parks
5935 // 2. Ty unparks Tx
5936 // 3. Tx resumes from park
5937
5938
5939 // value determined through experimentation
5940 #define ROUNDINGFIX 11
5941
5942 // utility to compute the abstime argument to timedwait.
5943 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5944
5945 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5946 // millis is the relative timeout time
5947 // abstime will be the absolute timeout time
5948 if (millis < 0) millis = 0;
5949 struct timeval now;
5950 int status = gettimeofday(&now, NULL);
5951 assert(status == 0, "gettimeofday");
5952 jlong seconds = millis / 1000;
5953 jlong max_wait_period;
5954
5955 if (UseLWPSynchronization) {
5956 // forward port of fix for 4275818 (not sleeping long enough)
5957 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5958 // _lwp_cond_timedwait() used a round_down algorithm rather
5959 // than a round_up. For millis less than our roundfactor
5960 // it rounded down to 0 which doesn't meet the spec.
5961 // For millis > roundfactor we may return a bit sooner, but
5962 // since we can not accurately identify the patch level and
5963 // this has already been fixed in Solaris 9 and 8 we will
5964 // leave it alone rather than always rounding down.
5965
5966 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5967 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5968 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5969 max_wait_period = 21000000;
5970 } else {
5971 max_wait_period = 50000000;
5972 }
5973 millis %= 1000;
5974 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5975 seconds = max_wait_period;
5976 }
5977 abstime->tv_sec = now.tv_sec + seconds;
5978 long usec = now.tv_usec + millis * 1000;
5979 if (usec >= 1000000) {
5980 abstime->tv_sec += 1;
5981 usec -= 1000000;
5982 }
5983 abstime->tv_nsec = usec * 1000;
5984 return abstime;
5985 }
5986
5987 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
5988 // Conceptually TryPark() should be equivalent to park(0).
5989
5990 int os::PlatformEvent::TryPark() {
5991 for (;;) {
5992 const int v = _Event ;
5993 guarantee ((v == 0) || (v == 1), "invariant") ;
5994 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
5995 }
5996 }
5997
5998 void os::PlatformEvent::park() { // AKA: down()
5999 // Invariant: Only the thread associated with the Event/PlatformEvent
6000 // may call park().
6001 int v ;
6002 for (;;) {
6003 v = _Event ;
6004 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
6005 }
6006 guarantee (v >= 0, "invariant") ;
6007 if (v == 0) {
6008 // Do this the hard way by blocking ...
6009 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6010 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6011 // Only for SPARC >= V8PlusA
6012 #if defined(__sparc) && defined(COMPILER2)
6013 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6014 #endif
6015 int status = os::Solaris::mutex_lock(_mutex);
6016 assert_status(status == 0, status, "mutex_lock");
6017 guarantee (_nParked == 0, "invariant") ;
6018 ++ _nParked ;
6019 while (_Event < 0) {
6020 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
6021 // Treat this the same as if the wait was interrupted
6022 // With usr/lib/lwp going to kernel, always handle ETIME
6023 status = os::Solaris::cond_wait(_cond, _mutex);
6024 if (status == ETIME) status = EINTR ;
6025 assert_status(status == 0 || status == EINTR, status, "cond_wait");
6026 }
6027 -- _nParked ;
6028 _Event = 0 ;
6029 status = os::Solaris::mutex_unlock(_mutex);
6030 assert_status(status == 0, status, "mutex_unlock");
6031 // Paranoia to ensure our locked and lock-free paths interact
6032 // correctly with each other.
6033 OrderAccess::fence();
6034 }
6035 }
6036
6037 int os::PlatformEvent::park(jlong millis) {
6038 guarantee (_nParked == 0, "invariant") ;
6039 int v ;
6040 for (;;) {
6041 v = _Event ;
6042 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
6043 }
6044 guarantee (v >= 0, "invariant") ;
6045 if (v != 0) return OS_OK ;
6046
6047 int ret = OS_TIMEOUT;
6048 timestruc_t abst;
6049 compute_abstime (&abst, millis);
6050
6051 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6052 // For Solaris SPARC set fprs.FEF=0 prior to parking.
6053 // Only for SPARC >= V8PlusA
6054 #if defined(__sparc) && defined(COMPILER2)
6055 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6056 #endif
6057 int status = os::Solaris::mutex_lock(_mutex);
6058 assert_status(status == 0, status, "mutex_lock");
6059 guarantee (_nParked == 0, "invariant") ;
6060 ++ _nParked ;
6061 while (_Event < 0) {
6062 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
6063 assert_status(status == 0 || status == EINTR ||
6064 status == ETIME || status == ETIMEDOUT,
6065 status, "cond_timedwait");
6066 if (!FilterSpuriousWakeups) break ; // previous semantics
6067 if (status == ETIME || status == ETIMEDOUT) break ;
6068 // We consume and ignore EINTR and spurious wakeups.
6069 }
6070 -- _nParked ;
6071 if (_Event >= 0) ret = OS_OK ;
6072 _Event = 0 ;
6073 status = os::Solaris::mutex_unlock(_mutex);
6074 assert_status(status == 0, status, "mutex_unlock");
6075 // Paranoia to ensure our locked and lock-free paths interact
6076 // correctly with each other.
6077 OrderAccess::fence();
6078 return ret;
6079 }
6080
6081 void os::PlatformEvent::unpark() {
6082 // Transitions for _Event:
6083 // 0 :=> 1
6084 // 1 :=> 1
6085 // -1 :=> either 0 or 1; must signal target thread
6086 // That is, we can safely transition _Event from -1 to either
6087 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back
6088 // unpark() calls.
6089 // See also: "Semaphores in Plan 9" by Mullender & Cox
6090 //
6091 // Note: Forcing a transition from "-1" to "1" on an unpark() means
6092 // that it will take two back-to-back park() calls for the owning
6093 // thread to block. This has the benefit of forcing a spurious return
6094 // from the first park() call after an unpark() call which will help
6095 // shake out uses of park() and unpark() without condition variables.
6096
6097 if (Atomic::xchg(1, &_Event) >= 0) return;
6098
6099 // If the thread associated with the event was parked, wake it.
6100 // Wait for the thread assoc with the PlatformEvent to vacate.
6101 int status = os::Solaris::mutex_lock(_mutex);
6102 assert_status(status == 0, status, "mutex_lock");
6103 int AnyWaiters = _nParked;
6104 status = os::Solaris::mutex_unlock(_mutex);
6105 assert_status(status == 0, status, "mutex_unlock");
6106 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
6107 if (AnyWaiters != 0) {
6108 // We intentional signal *after* dropping the lock
6109 // to avoid a common class of futile wakeups.
6110 status = os::Solaris::cond_signal(_cond);
6111 assert_status(status == 0, status, "cond_signal");
6112 }
6113 }
6114
6115 // JSR166
6116 // -------------------------------------------------------
6117
6118 /*
6119 * The solaris and linux implementations of park/unpark are fairly
6120 * conservative for now, but can be improved. They currently use a
6121 * mutex/condvar pair, plus _counter.
6122 * Park decrements _counter if > 0, else does a condvar wait. Unpark
6123 * sets count to 1 and signals condvar. Only one thread ever waits
6124 * on the condvar. Contention seen when trying to park implies that someone
6125 * is unparking you, so don't wait. And spurious returns are fine, so there
6126 * is no need to track notifications.
6127 */
6128
6129 #define MAX_SECS 100000000
6130 /*
6131 * This code is common to linux and solaris and will be moved to a
6132 * common place in dolphin.
6133 *
6134 * The passed in time value is either a relative time in nanoseconds
6135 * or an absolute time in milliseconds. Either way it has to be unpacked
6136 * into suitable seconds and nanoseconds components and stored in the
6137 * given timespec structure.
6138 * Given time is a 64-bit value and the time_t used in the timespec is only
6139 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
6140 * overflow if times way in the future are given. Further on Solaris versions
6141 * prior to 10 there is a restriction (see cond_timedwait) that the specified
6142 * number of seconds, in abstime, is less than current_time + 100,000,000.
6143 * As it will be 28 years before "now + 100000000" will overflow we can
6144 * ignore overflow and just impose a hard-limit on seconds using the value
6145 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
6146 * years from "now".
6147 */
6148 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
6149 assert (time > 0, "convertTime");
6150
6151 struct timeval now;
6152 int status = gettimeofday(&now, NULL);
6153 assert(status == 0, "gettimeofday");
6154
6155 time_t max_secs = now.tv_sec + MAX_SECS;
6156
6157 if (isAbsolute) {
6158 jlong secs = time / 1000;
6159 if (secs > max_secs) {
6160 absTime->tv_sec = max_secs;
6161 }
6162 else {
6163 absTime->tv_sec = secs;
6164 }
6165 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
6166 }
6167 else {
6168 jlong secs = time / NANOSECS_PER_SEC;
6169 if (secs >= MAX_SECS) {
6170 absTime->tv_sec = max_secs;
6171 absTime->tv_nsec = 0;
6172 }
6173 else {
6174 absTime->tv_sec = now.tv_sec + secs;
6175 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
6176 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
6177 absTime->tv_nsec -= NANOSECS_PER_SEC;
6178 ++absTime->tv_sec; // note: this must be <= max_secs
6179 }
6180 }
6181 }
6182 assert(absTime->tv_sec >= 0, "tv_sec < 0");
6183 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
6184 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
6185 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
6186 }
6187
6188 void Parker::park(bool isAbsolute, jlong time) {
6189 // Ideally we'd do something useful while spinning, such
6190 // as calling unpackTime().
6191
6192 // Optional fast-path check:
6193 // Return immediately if a permit is available.
6194 // We depend on Atomic::xchg() having full barrier semantics
6195 // since we are doing a lock-free update to _counter.
6196 if (Atomic::xchg(0, &_counter) > 0) return;
6197
6198 // Optional fast-exit: Check interrupt before trying to wait
6199 Thread* thread = Thread::current();
6200 assert(thread->is_Java_thread(), "Must be JavaThread");
6201 JavaThread *jt = (JavaThread *)thread;
6202 if (Thread::is_interrupted(thread, false)) {
6203 return;
6204 }
6205
6206 // First, demultiplex/decode time arguments
6207 timespec absTime;
6208 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
6209 return;
6210 }
6211 if (time > 0) {
6212 // Warning: this code might be exposed to the old Solaris time
6213 // round-down bugs. Grep "roundingFix" for details.
6214 unpackTime(&absTime, isAbsolute, time);
6215 }
6216
6217 // Enter safepoint region
6218 // Beware of deadlocks such as 6317397.
6219 // The per-thread Parker:: _mutex is a classic leaf-lock.
6220 // In particular a thread must never block on the Threads_lock while
6221 // holding the Parker:: mutex. If safepoints are pending both the
6222 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
6223 ThreadBlockInVM tbivm(jt);
6224
6225 // Don't wait if cannot get lock since interference arises from
6226 // unblocking. Also. check interrupt before trying wait
6227 if (Thread::is_interrupted(thread, false) ||
6228 os::Solaris::mutex_trylock(_mutex) != 0) {
6229 return;
6230 }
6231
6232 int status ;
6233
6234 if (_counter > 0) { // no wait needed
6235 _counter = 0;
6236 status = os::Solaris::mutex_unlock(_mutex);
6237 assert (status == 0, "invariant") ;
6238 // Paranoia to ensure our locked and lock-free paths interact
6239 // correctly with each other and Java-level accesses.
6240 OrderAccess::fence();
6241 return;
6242 }
6243
6244 #ifdef ASSERT
6245 // Don't catch signals while blocked; let the running threads have the signals.
6246 // (This allows a debugger to break into the running thread.)
6247 sigset_t oldsigs;
6248 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
6249 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
6250 #endif
6251
6252 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
6253 jt->set_suspend_equivalent();
6254 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
6255
6256 // Do this the hard way by blocking ...
6257 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6258 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6259 // Only for SPARC >= V8PlusA
6260 #if defined(__sparc) && defined(COMPILER2)
6261 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6262 #endif
6263
6264 if (time == 0) {
6265 status = os::Solaris::cond_wait (_cond, _mutex) ;
6266 } else {
6267 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
6268 }
6269 // Note that an untimed cond_wait() can sometimes return ETIME on older
6270 // versions of the Solaris.
6271 assert_status(status == 0 || status == EINTR ||
6272 status == ETIME || status == ETIMEDOUT,
6273 status, "cond_timedwait");
6274
6275 #ifdef ASSERT
6276 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
6277 #endif
6278 _counter = 0 ;
6279 status = os::Solaris::mutex_unlock(_mutex);
6280 assert_status(status == 0, status, "mutex_unlock") ;
6281 // Paranoia to ensure our locked and lock-free paths interact
6282 // correctly with each other and Java-level accesses.
6283 OrderAccess::fence();
6284
6285 // If externally suspended while waiting, re-suspend
6286 if (jt->handle_special_suspend_equivalent_condition()) {
6287 jt->java_suspend_self();
6288 }
6289 }
6290
6291 void Parker::unpark() {
6292 int s, status ;
6293 status = os::Solaris::mutex_lock (_mutex) ;
6294 assert (status == 0, "invariant") ;
6295 s = _counter;
6296 _counter = 1;
6297 status = os::Solaris::mutex_unlock (_mutex) ;
6298 assert (status == 0, "invariant") ;
6299
6300 if (s < 1) {
6301 status = os::Solaris::cond_signal (_cond) ;
6302 assert (status == 0, "invariant") ;
6303 }
6304 }
6305
6306 extern char** environ;
6307
6308 // Run the specified command in a separate process. Return its exit value,
6309 // or -1 on failure (e.g. can't fork a new process).
6310 // Unlike system(), this function can be called from signal handler. It
6311 // doesn't block SIGINT et al.
6312 int os::fork_and_exec(char* cmd) {
6313 char * argv[4];
6314 argv[0] = (char *)"sh";
6315 argv[1] = (char *)"-c";
6316 argv[2] = cmd;
6317 argv[3] = NULL;
6318
6319 // fork is async-safe, fork1 is not so can't use in signal handler
6320 pid_t pid;
6321 Thread* t = ThreadLocalStorage::get_thread_slow();
6322 if (t != NULL && t->is_inside_signal_handler()) {
6323 pid = fork();
6324 } else {
6325 pid = fork1();
6326 }
6327
6328 if (pid < 0) {
6329 // fork failed
6330 warning("fork failed: %s", strerror(errno));
6331 return -1;
6332
6333 } else if (pid == 0) {
6334 // child process
6335
6336 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
6337 execve("/usr/bin/sh", argv, environ);
6338
6339 // execve failed
6340 _exit(-1);
6341
6342 } else {
6343 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
6344 // care about the actual exit code, for now.
6345
6346 int status;
6347
6348 // Wait for the child process to exit. This returns immediately if
6349 // the child has already exited. */
6350 while (waitpid(pid, &status, 0) < 0) {
6351 switch (errno) {
6352 case ECHILD: return 0;
6353 case EINTR: break;
6354 default: return -1;
6355 }
6356 }
6357
6358 if (WIFEXITED(status)) {
6359 // The child exited normally; get its exit code.
6360 return WEXITSTATUS(status);
6361 } else if (WIFSIGNALED(status)) {
6362 // The child exited because of a signal
6363 // The best value to return is 0x80 + signal number,
6364 // because that is what all Unix shells do, and because
6365 // it allows callers to distinguish between process exit and
6366 // process death by signal.
6367 return 0x80 + WTERMSIG(status);
6368 } else {
6369 // Unknown exit code; pass it through
6370 return status;
6371 }
6372 }
6373 }
6374
6375 // is_headless_jre()
6376 //
6377 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
6378 // in order to report if we are running in a headless jre
6379 //
6380 // Since JDK8 xawt/libmawt.so was moved into the same directory
6381 // as libawt.so, and renamed libawt_xawt.so
6382 //
6383 bool os::is_headless_jre() {
6384 struct stat statbuf;
6385 char buf[MAXPATHLEN];
6386 char libmawtpath[MAXPATHLEN];
6387 const char *xawtstr = "/xawt/libmawt.so";
6388 const char *new_xawtstr = "/libawt_xawt.so";
6389 char *p;
6390
6391 // Get path to libjvm.so
6392 os::jvm_path(buf, sizeof(buf));
6393
6394 // Get rid of libjvm.so
6395 p = strrchr(buf, '/');
6396 if (p == NULL) return false;
6397 else *p = '\0';
6398
6399 // Get rid of client or server
6400 p = strrchr(buf, '/');
6401 if (p == NULL) return false;
6402 else *p = '\0';
6403
6404 // check xawt/libmawt.so
6405 strcpy(libmawtpath, buf);
6406 strcat(libmawtpath, xawtstr);
6407 if (::stat(libmawtpath, &statbuf) == 0) return false;
6408
6409 // check libawt_xawt.so
6410 strcpy(libmawtpath, buf);
6411 strcat(libmawtpath, new_xawtstr);
6412 if (::stat(libmawtpath, &statbuf) == 0) return false;
6413
6414 return true;
6415 }
6416
6417 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
6418 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted);
6419 }
6420
6421 int os::close(int fd) {
6422 RESTARTABLE_RETURN_INT(::close(fd));
6423 }
6424
6425 int os::socket_close(int fd) {
6426 RESTARTABLE_RETURN_INT(::close(fd));
6427 }
6428
6429 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
6430 INTERRUPTIBLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6431 }
6432
6433 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
6434 INTERRUPTIBLE_RETURN_INT((int)::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6435 }
6436
6437 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
6438 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
6439 }
6440
6441 // As both poll and select can be interrupted by signals, we have to be
6442 // prepared to restart the system call after updating the timeout, unless
6443 // a poll() is done with timeout == -1, in which case we repeat with this
6444 // "wait forever" value.
6445
6446 int os::timeout(int fd, long timeout) {
6447 int res;
6448 struct timeval t;
6449 julong prevtime, newtime;
6450 static const char* aNull = 0;
6451 struct pollfd pfd;
6452 pfd.fd = fd;
6453 pfd.events = POLLIN;
6454
6455 gettimeofday(&t, &aNull);
6456 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
6457
6458 for(;;) {
6459 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted);
6460 if(res == OS_ERR && errno == EINTR) {
6461 if(timeout != -1) {
6462 gettimeofday(&t, &aNull);
6463 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000;
6464 timeout -= newtime - prevtime;
6465 if(timeout <= 0)
6466 return OS_OK;
6467 prevtime = newtime;
6468 }
6469 } else return res;
6470 }
6471 }
6472
6473 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
6474 int _result;
6475 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,\
6476 os::Solaris::clear_interrupted);
6477
6478 // Depending on when thread interruption is reset, _result could be
6479 // one of two values when errno == EINTR
6480
6481 if (((_result == OS_INTRPT) || (_result == OS_ERR))
6482 && (errno == EINTR)) {
6483 /* restarting a connect() changes its errno semantics */
6484 INTERRUPTIBLE(::connect(fd, him, len), _result,\
6485 os::Solaris::clear_interrupted);
6486 /* undo these changes */
6487 if (_result == OS_ERR) {
6488 if (errno == EALREADY) {
6489 errno = EINPROGRESS; /* fall through */
6490 } else if (errno == EISCONN) {
6491 errno = 0;
6492 return OS_OK;
6493 }
6494 }
6495 }
6496 return _result;
6497 }
6498
6499 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
6500 if (fd < 0) {
6501 return OS_ERR;
6502 }
6503 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, len),\
6504 os::Solaris::clear_interrupted);
6505 }
6506
6507 int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
6508 sockaddr* from, socklen_t* fromlen) {
6509 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen),\
6510 os::Solaris::clear_interrupted);
6511 }
6512
6513 int os::sendto(int fd, char* buf, size_t len, uint flags,
6514 struct sockaddr* to, socklen_t tolen) {
6515 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen),\
6516 os::Solaris::clear_interrupted);
6517 }
6518
6519 int os::socket_available(int fd, jint *pbytes) {
6520 if (fd < 0) {
6521 return OS_OK;
6522 }
6523 int ret;
6524 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
6525 // note: ioctl can return 0 when successful, JVM_SocketAvailable
6526 // is expected to return 0 on failure and 1 on success to the jdk.
6527 return (ret == OS_ERR) ? 0 : 1;
6528 }
6529
6530 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
6531 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\
6532 os::Solaris::clear_interrupted);
6533 }
6534
6535 // Get the default path to the core file
6536 // Returns the length of the string
6537 int os::get_core_path(char* buffer, size_t bufferSize) {
6538 const char* p = get_current_directory(buffer, bufferSize);
6539
6540 if (p == NULL) {
6541 assert(p != NULL, "failed to get current directory");
6542 return 0;
6543 }
6544
6545 return strlen(buffer);
6546 }