1 /*
2 * Copyright (c) 1997, 2012, 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 _exit(-1);
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] < (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 return retAddr;
3424 }
3425
3426 bool os::release_memory_special(char* base, size_t bytes) {
3427 // detaching the SHM segment will also delete it, see reserve_memory_special()
3428 int rslt = shmdt(base);
3429 return rslt == 0;
3430 }
3431
3432 size_t os::large_page_size() {
3433 return _large_page_size;
3434 }
3435
3436 // MPSS allows application to commit large page memory on demand; with ISM
3437 // the entire memory region must be allocated as shared memory.
3438 bool os::can_commit_large_page_memory() {
3439 return UseISM ? false : true;
3440 }
3441
3442 bool os::can_execute_large_page_memory() {
3443 return UseISM ? false : true;
3444 }
3445
3446 static int os_sleep(jlong millis, bool interruptible) {
3447 const jlong limit = INT_MAX;
3448 jlong prevtime;
3449 int res;
3450
3451 while (millis > limit) {
3452 if ((res = os_sleep(limit, interruptible)) != OS_OK)
3453 return res;
3454 millis -= limit;
3455 }
3456
3457 // Restart interrupted polls with new parameters until the proper delay
3458 // has been completed.
3459
3460 prevtime = getTimeMillis();
3461
3462 while (millis > 0) {
3463 jlong newtime;
3464
3465 if (!interruptible) {
3466 // Following assert fails for os::yield_all:
3467 // assert(!thread->is_Java_thread(), "must not be java thread");
3468 res = poll(NULL, 0, millis);
3469 } else {
3470 JavaThread *jt = JavaThread::current();
3471
3472 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt,
3473 os::Solaris::clear_interrupted);
3474 }
3475
3476 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for
3477 // thread.Interrupt.
3478
3479 // See c/r 6751923. Poll can return 0 before time
3480 // has elapsed if time is set via clock_settime (as NTP does).
3481 // res == 0 if poll timed out (see man poll RETURN VALUES)
3482 // using the logic below checks that we really did
3483 // sleep at least "millis" if not we'll sleep again.
3484 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) {
3485 newtime = getTimeMillis();
3486 assert(newtime >= prevtime, "time moving backwards");
3487 /* Doing prevtime and newtime in microseconds doesn't help precision,
3488 and trying to round up to avoid lost milliseconds can result in a
3489 too-short delay. */
3490 millis -= newtime - prevtime;
3491 if(millis <= 0)
3492 return OS_OK;
3493 prevtime = newtime;
3494 } else
3495 return res;
3496 }
3497
3498 return OS_OK;
3499 }
3500
3501 // Read calls from inside the vm need to perform state transitions
3502 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3503 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3504 }
3505
3506 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3507 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3508 }
3509
3510 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
3511 assert(thread == Thread::current(), "thread consistency check");
3512
3513 // TODO-FIXME: this should be removed.
3514 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock
3515 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate
3516 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving
3517 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel
3518 // is fooled into believing that the system is making progress. In the code below we block the
3519 // the watcher thread while safepoint is in progress so that it would not appear as though the
3520 // system is making progress.
3521 if (!Solaris::T2_libthread() &&
3522 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) {
3523 // We now try to acquire the threads lock. Since this lock is held by the VM thread during
3524 // the entire safepoint, the watcher thread will line up here during the safepoint.
3525 Threads_lock->lock_without_safepoint_check();
3526 Threads_lock->unlock();
3527 }
3528
3529 if (thread->is_Java_thread()) {
3530 // This is a JavaThread so we honor the _thread_blocked protocol
3531 // even for sleeps of 0 milliseconds. This was originally done
3532 // as a workaround for bug 4338139. However, now we also do it
3533 // to honor the suspend-equivalent protocol.
3534
3535 JavaThread *jt = (JavaThread *) thread;
3536 ThreadBlockInVM tbivm(jt);
3537
3538 jt->set_suspend_equivalent();
3539 // cleared by handle_special_suspend_equivalent_condition() or
3540 // java_suspend_self() via check_and_wait_while_suspended()
3541
3542 int ret_code;
3543 if (millis <= 0) {
3544 thr_yield();
3545 ret_code = 0;
3546 } else {
3547 // The original sleep() implementation did not create an
3548 // OSThreadWaitState helper for sleeps of 0 milliseconds.
3549 // I'm preserving that decision for now.
3550 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
3551
3552 ret_code = os_sleep(millis, interruptible);
3553 }
3554
3555 // were we externally suspended while we were waiting?
3556 jt->check_and_wait_while_suspended();
3557
3558 return ret_code;
3559 }
3560
3561 // non-JavaThread from this point on:
3562
3563 if (millis <= 0) {
3564 thr_yield();
3565 return 0;
3566 }
3567
3568 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
3569
3570 return os_sleep(millis, interruptible);
3571 }
3572
3573 int os::naked_sleep() {
3574 // %% make the sleep time an integer flag. for now use 1 millisec.
3575 return os_sleep(1, false);
3576 }
3577
3578 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3579 void os::infinite_sleep() {
3580 while (true) { // sleep forever ...
3581 ::sleep(100); // ... 100 seconds at a time
3582 }
3583 }
3584
3585 // Used to convert frequent JVM_Yield() to nops
3586 bool os::dont_yield() {
3587 if (DontYieldALot) {
3588 static hrtime_t last_time = 0;
3589 hrtime_t diff = getTimeNanos() - last_time;
3590
3591 if (diff < DontYieldALotInterval * 1000000)
3592 return true;
3593
3594 last_time += diff;
3595
3596 return false;
3597 }
3598 else {
3599 return false;
3600 }
3601 }
3602
3603 // Caveat: Solaris os::yield() causes a thread-state transition whereas
3604 // the linux and win32 implementations do not. This should be checked.
3605
3606 void os::yield() {
3607 // Yields to all threads with same or greater priority
3608 os::sleep(Thread::current(), 0, false);
3609 }
3610
3611 // Note that yield semantics are defined by the scheduling class to which
3612 // the thread currently belongs. Typically, yield will _not yield to
3613 // other equal or higher priority threads that reside on the dispatch queues
3614 // of other CPUs.
3615
3616 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
3617
3618
3619 // On Solaris we found that yield_all doesn't always yield to all other threads.
3620 // There have been cases where there is a thread ready to execute but it doesn't
3621 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
3622 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a
3623 // SIGWAITING signal which will cause a new lwp to be created. So we count the
3624 // number of times yield_all is called in the one loop and increase the sleep
3625 // time after 8 attempts. If this fails too we increase the concurrency level
3626 // so that the starving thread would get an lwp
3627
3628 void os::yield_all(int attempts) {
3629 // Yields to all threads, including threads with lower priorities
3630 if (attempts == 0) {
3631 os::sleep(Thread::current(), 1, false);
3632 } else {
3633 int iterations = attempts % 30;
3634 if (iterations == 0 && !os::Solaris::T2_libthread()) {
3635 // thr_setconcurrency and _getconcurrency make sense only under T1.
3636 int noofLWPS = thr_getconcurrency();
3637 if (noofLWPS < (Threads::number_of_threads() + 2)) {
3638 thr_setconcurrency(thr_getconcurrency() + 1);
3639 }
3640 } else if (iterations < 25) {
3641 os::sleep(Thread::current(), 1, false);
3642 } else {
3643 os::sleep(Thread::current(), 10, false);
3644 }
3645 }
3646 }
3647
3648 // Called from the tight loops to possibly influence time-sharing heuristics
3649 void os::loop_breaker(int attempts) {
3650 os::yield_all(attempts);
3651 }
3652
3653
3654 // Interface for setting lwp priorities. If we are using T2 libthread,
3655 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3656 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3657 // function is meaningless in this mode so we must adjust the real lwp's priority
3658 // The routines below implement the getting and setting of lwp priorities.
3659 //
3660 // Note: There are three priority scales used on Solaris. Java priotities
3661 // which range from 1 to 10, libthread "thr_setprio" scale which range
3662 // from 0 to 127, and the current scheduling class of the process we
3663 // are running in. This is typically from -60 to +60.
3664 // The setting of the lwp priorities in done after a call to thr_setprio
3665 // so Java priorities are mapped to libthread priorities and we map from
3666 // the latter to lwp priorities. We don't keep priorities stored in
3667 // Java priorities since some of our worker threads want to set priorities
3668 // higher than all Java threads.
3669 //
3670 // For related information:
3671 // (1) man -s 2 priocntl
3672 // (2) man -s 4 priocntl
3673 // (3) man dispadmin
3674 // = librt.so
3675 // = libthread/common/rtsched.c - thrp_setlwpprio().
3676 // = ps -cL <pid> ... to validate priority.
3677 // = sched_get_priority_min and _max
3678 // pthread_create
3679 // sched_setparam
3680 // pthread_setschedparam
3681 //
3682 // Assumptions:
3683 // + We assume that all threads in the process belong to the same
3684 // scheduling class. IE. an homogenous process.
3685 // + Must be root or in IA group to change change "interactive" attribute.
3686 // Priocntl() will fail silently. The only indication of failure is when
3687 // we read-back the value and notice that it hasn't changed.
3688 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3689 // + For RT, change timeslice as well. Invariant:
3690 // constant "priority integral"
3691 // Konst == TimeSlice * (60-Priority)
3692 // Given a priority, compute appropriate timeslice.
3693 // + Higher numerical values have higher priority.
3694
3695 // sched class attributes
3696 typedef struct {
3697 int schedPolicy; // classID
3698 int maxPrio;
3699 int minPrio;
3700 } SchedInfo;
3701
3702
3703 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3704
3705 #ifdef ASSERT
3706 static int ReadBackValidate = 1;
3707 #endif
3708 static int myClass = 0;
3709 static int myMin = 0;
3710 static int myMax = 0;
3711 static int myCur = 0;
3712 static bool priocntl_enable = false;
3713
3714 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3715 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3716
3717 // Call the version of priocntl suitable for all supported versions
3718 // of Solaris. We need to call through this wrapper so that we can
3719 // build on Solaris 9 and run on Solaris 8, 9 and 10.
3720 //
3721 // This code should be removed if we ever stop supporting Solaris 8
3722 // and earlier releases.
3723
3724 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3725 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3726 static priocntl_type priocntl_ptr = priocntl_stub;
3727
3728 // Stub to set the value of the real pointer, and then call the real
3729 // function.
3730
3731 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) {
3732 // Try Solaris 8- name only.
3733 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl");
3734 guarantee(tmp != NULL, "priocntl function not found.");
3735 priocntl_ptr = tmp;
3736 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg);
3737 }
3738
3739
3740 // lwp_priocntl_init
3741 //
3742 // Try to determine the priority scale for our process.
3743 //
3744 // Return errno or 0 if OK.
3745 //
3746 static
3747 int lwp_priocntl_init ()
3748 {
3749 int rslt;
3750 pcinfo_t ClassInfo;
3751 pcparms_t ParmInfo;
3752 int i;
3753
3754 if (!UseThreadPriorities) return 0;
3755
3756 // We are using Bound threads, we need to determine our priority ranges
3757 if (os::Solaris::T2_libthread() || UseBoundThreads) {
3758 // If ThreadPriorityPolicy is 1, switch tables
3759 if (ThreadPriorityPolicy == 1) {
3760 for (i = 0 ; i < CriticalPriority+1; i++)
3761 os::java_to_os_priority[i] = prio_policy1[i];
3762 }
3763 if (UseCriticalJavaThreadPriority) {
3764 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3765 // See set_native_priority() and set_lwp_class_and_priority().
3766 // Save original MaxPriority mapping in case attempt to
3767 // use critical priority fails.
3768 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3769 // Set negative to distinguish from other priorities
3770 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3771 }
3772 }
3773 // Not using Bound Threads, set to ThreadPolicy 1
3774 else {
3775 for ( i = 0 ; i < CriticalPriority+1; i++ ) {
3776 os::java_to_os_priority[i] = prio_policy1[i];
3777 }
3778 return 0;
3779 }
3780
3781 // Get IDs for a set of well-known scheduling classes.
3782 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3783 // the system. We should have a loop that iterates over the
3784 // classID values, which are known to be "small" integers.
3785
3786 strcpy(ClassInfo.pc_clname, "TS");
3787 ClassInfo.pc_cid = -1;
3788 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3789 if (rslt < 0) return errno;
3790 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3791 tsLimits.schedPolicy = ClassInfo.pc_cid;
3792 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3793 tsLimits.minPrio = -tsLimits.maxPrio;
3794
3795 strcpy(ClassInfo.pc_clname, "IA");
3796 ClassInfo.pc_cid = -1;
3797 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3798 if (rslt < 0) return errno;
3799 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3800 iaLimits.schedPolicy = ClassInfo.pc_cid;
3801 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3802 iaLimits.minPrio = -iaLimits.maxPrio;
3803
3804 strcpy(ClassInfo.pc_clname, "RT");
3805 ClassInfo.pc_cid = -1;
3806 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3807 if (rslt < 0) return errno;
3808 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3809 rtLimits.schedPolicy = ClassInfo.pc_cid;
3810 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3811 rtLimits.minPrio = 0;
3812
3813 strcpy(ClassInfo.pc_clname, "FX");
3814 ClassInfo.pc_cid = -1;
3815 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3816 if (rslt < 0) return errno;
3817 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3818 fxLimits.schedPolicy = ClassInfo.pc_cid;
3819 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3820 fxLimits.minPrio = 0;
3821
3822 // Query our "current" scheduling class.
3823 // This will normally be IA, TS or, rarely, FX or RT.
3824 memset(&ParmInfo, 0, sizeof(ParmInfo));
3825 ParmInfo.pc_cid = PC_CLNULL;
3826 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3827 if (rslt < 0) return errno;
3828 myClass = ParmInfo.pc_cid;
3829
3830 // We now know our scheduling classId, get specific information
3831 // about the class.
3832 ClassInfo.pc_cid = myClass;
3833 ClassInfo.pc_clname[0] = 0;
3834 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3835 if (rslt < 0) return errno;
3836
3837 if (ThreadPriorityVerbose) {
3838 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3839 }
3840
3841 memset(&ParmInfo, 0, sizeof(pcparms_t));
3842 ParmInfo.pc_cid = PC_CLNULL;
3843 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3844 if (rslt < 0) return errno;
3845
3846 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3847 myMin = rtLimits.minPrio;
3848 myMax = rtLimits.maxPrio;
3849 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3850 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3851 myMin = iaLimits.minPrio;
3852 myMax = iaLimits.maxPrio;
3853 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3854 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3855 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3856 myMin = tsLimits.minPrio;
3857 myMax = tsLimits.maxPrio;
3858 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3859 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3860 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3861 myMin = fxLimits.minPrio;
3862 myMax = fxLimits.maxPrio;
3863 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3864 } else {
3865 // No clue - punt
3866 if (ThreadPriorityVerbose)
3867 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
3868 return EINVAL; // no clue, punt
3869 }
3870
3871 if (ThreadPriorityVerbose) {
3872 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
3873 }
3874
3875 priocntl_enable = true; // Enable changing priorities
3876 return 0;
3877 }
3878
3879 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3880 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3881 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3882 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3883
3884
3885 // scale_to_lwp_priority
3886 //
3887 // Convert from the libthread "thr_setprio" scale to our current
3888 // lwp scheduling class scale.
3889 //
3890 static
3891 int scale_to_lwp_priority (int rMin, int rMax, int x)
3892 {
3893 int v;
3894
3895 if (x == 127) return rMax; // avoid round-down
3896 v = (((x*(rMax-rMin)))/128)+rMin;
3897 return v;
3898 }
3899
3900
3901 // set_lwp_class_and_priority
3902 //
3903 // Set the class and priority of the lwp. This call should only
3904 // be made when using bound threads (T2 threads are bound by default).
3905 //
3906 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3907 int newPrio, int new_class, bool scale) {
3908 int rslt;
3909 int Actual, Expected, prv;
3910 pcparms_t ParmInfo; // for GET-SET
3911 #ifdef ASSERT
3912 pcparms_t ReadBack; // for readback
3913 #endif
3914
3915 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3916 // Query current values.
3917 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3918 // Cache "pcparms_t" in global ParmCache.
3919 // TODO: elide set-to-same-value
3920
3921 // If something went wrong on init, don't change priorities.
3922 if ( !priocntl_enable ) {
3923 if (ThreadPriorityVerbose)
3924 tty->print_cr("Trying to set priority but init failed, ignoring");
3925 return EINVAL;
3926 }
3927
3928 // If lwp hasn't started yet, just return
3929 // the _start routine will call us again.
3930 if ( lwpid <= 0 ) {
3931 if (ThreadPriorityVerbose) {
3932 tty->print_cr ("deferring the set_lwp_class_and_priority of thread "
3933 INTPTR_FORMAT " to %d, lwpid not set",
3934 ThreadID, newPrio);
3935 }
3936 return 0;
3937 }
3938
3939 if (ThreadPriorityVerbose) {
3940 tty->print_cr ("set_lwp_class_and_priority("
3941 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3942 ThreadID, lwpid, newPrio);
3943 }
3944
3945 memset(&ParmInfo, 0, sizeof(pcparms_t));
3946 ParmInfo.pc_cid = PC_CLNULL;
3947 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3948 if (rslt < 0) return errno;
3949
3950 int cur_class = ParmInfo.pc_cid;
3951 ParmInfo.pc_cid = (id_t)new_class;
3952
3953 if (new_class == rtLimits.schedPolicy) {
3954 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3955 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3956 rtLimits.maxPrio, newPrio)
3957 : newPrio;
3958 rtInfo->rt_tqsecs = RT_NOCHANGE;
3959 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3960 if (ThreadPriorityVerbose) {
3961 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3962 }
3963 } else if (new_class == iaLimits.schedPolicy) {
3964 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3965 int maxClamped = MIN2(iaLimits.maxPrio,
3966 cur_class == new_class
3967 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3968 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3969 maxClamped, newPrio)
3970 : newPrio;
3971 iaInfo->ia_uprilim = cur_class == new_class
3972 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3973 iaInfo->ia_mode = IA_NOCHANGE;
3974 if (ThreadPriorityVerbose) {
3975 tty->print_cr("IA: [%d...%d] %d->%d\n",
3976 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3977 }
3978 } else if (new_class == tsLimits.schedPolicy) {
3979 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3980 int maxClamped = MIN2(tsLimits.maxPrio,
3981 cur_class == new_class
3982 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3983 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3984 maxClamped, newPrio)
3985 : newPrio;
3986 tsInfo->ts_uprilim = cur_class == new_class
3987 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3988 if (ThreadPriorityVerbose) {
3989 tty->print_cr("TS: [%d...%d] %d->%d\n",
3990 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3991 }
3992 } else if (new_class == fxLimits.schedPolicy) {
3993 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3994 int maxClamped = MIN2(fxLimits.maxPrio,
3995 cur_class == new_class
3996 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3997 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3998 maxClamped, newPrio)
3999 : newPrio;
4000 fxInfo->fx_uprilim = cur_class == new_class
4001 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
4002 fxInfo->fx_tqsecs = FX_NOCHANGE;
4003 fxInfo->fx_tqnsecs = FX_NOCHANGE;
4004 if (ThreadPriorityVerbose) {
4005 tty->print_cr("FX: [%d...%d] %d->%d\n",
4006 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
4007 }
4008 } else {
4009 if (ThreadPriorityVerbose) {
4010 tty->print_cr("Unknown new scheduling class %d\n", new_class);
4011 }
4012 return EINVAL; // no clue, punt
4013 }
4014
4015 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
4016 if (ThreadPriorityVerbose && rslt) {
4017 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
4018 }
4019 if (rslt < 0) return errno;
4020
4021 #ifdef ASSERT
4022 // Sanity check: read back what we just attempted to set.
4023 // In theory it could have changed in the interim ...
4024 //
4025 // The priocntl system call is tricky.
4026 // Sometimes it'll validate the priority value argument and
4027 // return EINVAL if unhappy. At other times it fails silently.
4028 // Readbacks are prudent.
4029
4030 if (!ReadBackValidate) return 0;
4031
4032 memset(&ReadBack, 0, sizeof(pcparms_t));
4033 ReadBack.pc_cid = PC_CLNULL;
4034 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
4035 assert(rslt >= 0, "priocntl failed");
4036 Actual = Expected = 0xBAD;
4037 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
4038 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
4039 Actual = RTPRI(ReadBack)->rt_pri;
4040 Expected = RTPRI(ParmInfo)->rt_pri;
4041 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
4042 Actual = IAPRI(ReadBack)->ia_upri;
4043 Expected = IAPRI(ParmInfo)->ia_upri;
4044 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
4045 Actual = TSPRI(ReadBack)->ts_upri;
4046 Expected = TSPRI(ParmInfo)->ts_upri;
4047 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
4048 Actual = FXPRI(ReadBack)->fx_upri;
4049 Expected = FXPRI(ParmInfo)->fx_upri;
4050 } else {
4051 if (ThreadPriorityVerbose) {
4052 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
4053 ParmInfo.pc_cid);
4054 }
4055 }
4056
4057 if (Actual != Expected) {
4058 if (ThreadPriorityVerbose) {
4059 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
4060 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
4061 }
4062 }
4063 #endif
4064
4065 return 0;
4066 }
4067
4068 // Solaris only gives access to 128 real priorities at a time,
4069 // so we expand Java's ten to fill this range. This would be better
4070 // if we dynamically adjusted relative priorities.
4071 //
4072 // The ThreadPriorityPolicy option allows us to select 2 different
4073 // priority scales.
4074 //
4075 // ThreadPriorityPolicy=0
4076 // Since the Solaris' default priority is MaximumPriority, we do not
4077 // set a priority lower than Max unless a priority lower than
4078 // NormPriority is requested.
4079 //
4080 // ThreadPriorityPolicy=1
4081 // This mode causes the priority table to get filled with
4082 // linear values. NormPriority get's mapped to 50% of the
4083 // Maximum priority an so on. This will cause VM threads
4084 // to get unfair treatment against other Solaris processes
4085 // which do not explicitly alter their thread priorities.
4086 //
4087
4088 int os::java_to_os_priority[CriticalPriority + 1] = {
4089 -99999, // 0 Entry should never be used
4090
4091 0, // 1 MinPriority
4092 32, // 2
4093 64, // 3
4094
4095 96, // 4
4096 127, // 5 NormPriority
4097 127, // 6
4098
4099 127, // 7
4100 127, // 8
4101 127, // 9 NearMaxPriority
4102
4103 127, // 10 MaxPriority
4104
4105 -criticalPrio // 11 CriticalPriority
4106 };
4107
4108 OSReturn os::set_native_priority(Thread* thread, int newpri) {
4109 OSThread* osthread = thread->osthread();
4110
4111 // Save requested priority in case the thread hasn't been started
4112 osthread->set_native_priority(newpri);
4113
4114 // Check for critical priority request
4115 bool fxcritical = false;
4116 if (newpri == -criticalPrio) {
4117 fxcritical = true;
4118 newpri = criticalPrio;
4119 }
4120
4121 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
4122 if (!UseThreadPriorities) return OS_OK;
4123
4124 int status = 0;
4125
4126 if (!fxcritical) {
4127 // Use thr_setprio only if we have a priority that thr_setprio understands
4128 status = thr_setprio(thread->osthread()->thread_id(), newpri);
4129 }
4130
4131 if (os::Solaris::T2_libthread() ||
4132 (UseBoundThreads && osthread->is_vm_created())) {
4133 int lwp_status =
4134 set_lwp_class_and_priority(osthread->thread_id(),
4135 osthread->lwp_id(),
4136 newpri,
4137 fxcritical ? fxLimits.schedPolicy : myClass,
4138 !fxcritical);
4139 if (lwp_status != 0 && fxcritical) {
4140 // Try again, this time without changing the scheduling class
4141 newpri = java_MaxPriority_to_os_priority;
4142 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
4143 osthread->lwp_id(),
4144 newpri, myClass, false);
4145 }
4146 status |= lwp_status;
4147 }
4148 return (status == 0) ? OS_OK : OS_ERR;
4149 }
4150
4151
4152 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
4153 int p;
4154 if ( !UseThreadPriorities ) {
4155 *priority_ptr = NormalPriority;
4156 return OS_OK;
4157 }
4158 int status = thr_getprio(thread->osthread()->thread_id(), &p);
4159 if (status != 0) {
4160 return OS_ERR;
4161 }
4162 *priority_ptr = p;
4163 return OS_OK;
4164 }
4165
4166
4167 // Hint to the underlying OS that a task switch would not be good.
4168 // Void return because it's a hint and can fail.
4169 void os::hint_no_preempt() {
4170 schedctl_start(schedctl_init());
4171 }
4172
4173 void os::interrupt(Thread* thread) {
4174 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4175
4176 OSThread* osthread = thread->osthread();
4177
4178 int isInterrupted = osthread->interrupted();
4179 if (!isInterrupted) {
4180 osthread->set_interrupted(true);
4181 OrderAccess::fence();
4182 // os::sleep() is implemented with either poll (NULL,0,timeout) or
4183 // by parking on _SleepEvent. If the former, thr_kill will unwedge
4184 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper.
4185 ParkEvent * const slp = thread->_SleepEvent ;
4186 if (slp != NULL) slp->unpark() ;
4187 }
4188
4189 // For JSR166: unpark after setting status but before thr_kill -dl
4190 if (thread->is_Java_thread()) {
4191 ((JavaThread*)thread)->parker()->unpark();
4192 }
4193
4194 // Handle interruptible wait() ...
4195 ParkEvent * const ev = thread->_ParkEvent ;
4196 if (ev != NULL) ev->unpark() ;
4197
4198 // When events are used everywhere for os::sleep, then this thr_kill
4199 // will only be needed if UseVMInterruptibleIO is true.
4200
4201 if (!isInterrupted) {
4202 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt());
4203 assert_status(status == 0, status, "thr_kill");
4204
4205 // Bump thread interruption counter
4206 RuntimeService::record_thread_interrupt_signaled_count();
4207 }
4208 }
4209
4210
4211 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
4212 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4213
4214 OSThread* osthread = thread->osthread();
4215
4216 bool res = osthread->interrupted();
4217
4218 // NOTE that since there is no "lock" around these two operations,
4219 // there is the possibility that the interrupted flag will be
4220 // "false" but that the interrupt event will be set. This is
4221 // intentional. The effect of this is that Object.wait() will appear
4222 // to have a spurious wakeup, which is not harmful, and the
4223 // possibility is so rare that it is not worth the added complexity
4224 // to add yet another lock. It has also been recommended not to put
4225 // the interrupted flag into the os::Solaris::Event structure,
4226 // because it hides the issue.
4227 if (res && clear_interrupted) {
4228 osthread->set_interrupted(false);
4229 }
4230 return res;
4231 }
4232
4233
4234 void os::print_statistics() {
4235 }
4236
4237 int os::message_box(const char* title, const char* message) {
4238 int i;
4239 fdStream err(defaultStream::error_fd());
4240 for (i = 0; i < 78; i++) err.print_raw("=");
4241 err.cr();
4242 err.print_raw_cr(title);
4243 for (i = 0; i < 78; i++) err.print_raw("-");
4244 err.cr();
4245 err.print_raw_cr(message);
4246 for (i = 0; i < 78; i++) err.print_raw("=");
4247 err.cr();
4248
4249 char buf[16];
4250 // Prevent process from exiting upon "read error" without consuming all CPU
4251 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
4252
4253 return buf[0] == 'y' || buf[0] == 'Y';
4254 }
4255
4256 // A lightweight implementation that does not suspend the target thread and
4257 // thus returns only a hint. Used for profiling only!
4258 ExtendedPC os::get_thread_pc(Thread* thread) {
4259 // Make sure that it is called by the watcher and the Threads lock is owned.
4260 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
4261 // For now, is only used to profile the VM Thread
4262 assert(thread->is_VM_thread(), "Can only be called for VMThread");
4263 ExtendedPC epc;
4264
4265 GetThreadPC_Callback cb(ProfileVM_lock);
4266 OSThread *osthread = thread->osthread();
4267 const int time_to_wait = 400; // 400ms wait for initial response
4268 int status = cb.interrupt(thread, time_to_wait);
4269
4270 if (cb.is_done() ) {
4271 epc = cb.addr();
4272 } else {
4273 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status",
4274 osthread->thread_id(), status););
4275 // epc is already NULL
4276 }
4277 return epc;
4278 }
4279
4280
4281 // This does not do anything on Solaris. This is basically a hook for being
4282 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
4283 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
4284 f(value, method, args, thread);
4285 }
4286
4287 // This routine may be used by user applications as a "hook" to catch signals.
4288 // The user-defined signal handler must pass unrecognized signals to this
4289 // routine, and if it returns true (non-zero), then the signal handler must
4290 // return immediately. If the flag "abort_if_unrecognized" is true, then this
4291 // routine will never retun false (zero), but instead will execute a VM panic
4292 // routine kill the process.
4293 //
4294 // If this routine returns false, it is OK to call it again. This allows
4295 // the user-defined signal handler to perform checks either before or after
4296 // the VM performs its own checks. Naturally, the user code would be making
4297 // a serious error if it tried to handle an exception (such as a null check
4298 // or breakpoint) that the VM was generating for its own correct operation.
4299 //
4300 // This routine may recognize any of the following kinds of signals:
4301 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
4302 // os::Solaris::SIGasync
4303 // It should be consulted by handlers for any of those signals.
4304 // It explicitly does not recognize os::Solaris::SIGinterrupt
4305 //
4306 // The caller of this routine must pass in the three arguments supplied
4307 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
4308 // field of the structure passed to sigaction(). This routine assumes that
4309 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
4310 //
4311 // Note that the VM will print warnings if it detects conflicting signal
4312 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
4313 //
4314 extern "C" JNIEXPORT int
4315 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext,
4316 int abort_if_unrecognized);
4317
4318
4319 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
4320 JVM_handle_solaris_signal(sig, info, ucVoid, true);
4321 }
4322
4323 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
4324 is needed to provoke threads blocked on IO to return an EINTR
4325 Note: this explicitly does NOT call JVM_handle_solaris_signal and
4326 does NOT participate in signal chaining due to requirement for
4327 NOT setting SA_RESTART to make EINTR work. */
4328 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
4329 if (UseSignalChaining) {
4330 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
4331 if (actp && actp->sa_handler) {
4332 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
4333 }
4334 }
4335 }
4336
4337 // This boolean allows users to forward their own non-matching signals
4338 // to JVM_handle_solaris_signal, harmlessly.
4339 bool os::Solaris::signal_handlers_are_installed = false;
4340
4341 // For signal-chaining
4342 bool os::Solaris::libjsig_is_loaded = false;
4343 typedef struct sigaction *(*get_signal_t)(int);
4344 get_signal_t os::Solaris::get_signal_action = NULL;
4345
4346 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
4347 struct sigaction *actp = NULL;
4348
4349 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
4350 // Retrieve the old signal handler from libjsig
4351 actp = (*get_signal_action)(sig);
4352 }
4353 if (actp == NULL) {
4354 // Retrieve the preinstalled signal handler from jvm
4355 actp = get_preinstalled_handler(sig);
4356 }
4357
4358 return actp;
4359 }
4360
4361 static bool call_chained_handler(struct sigaction *actp, int sig,
4362 siginfo_t *siginfo, void *context) {
4363 // Call the old signal handler
4364 if (actp->sa_handler == SIG_DFL) {
4365 // It's more reasonable to let jvm treat it as an unexpected exception
4366 // instead of taking the default action.
4367 return false;
4368 } else if (actp->sa_handler != SIG_IGN) {
4369 if ((actp->sa_flags & SA_NODEFER) == 0) {
4370 // automaticlly block the signal
4371 sigaddset(&(actp->sa_mask), sig);
4372 }
4373
4374 sa_handler_t hand;
4375 sa_sigaction_t sa;
4376 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4377 // retrieve the chained handler
4378 if (siginfo_flag_set) {
4379 sa = actp->sa_sigaction;
4380 } else {
4381 hand = actp->sa_handler;
4382 }
4383
4384 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4385 actp->sa_handler = SIG_DFL;
4386 }
4387
4388 // try to honor the signal mask
4389 sigset_t oset;
4390 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4391
4392 // call into the chained handler
4393 if (siginfo_flag_set) {
4394 (*sa)(sig, siginfo, context);
4395 } else {
4396 (*hand)(sig);
4397 }
4398
4399 // restore the signal mask
4400 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4401 }
4402 // Tell jvm's signal handler the signal is taken care of.
4403 return true;
4404 }
4405
4406 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4407 bool chained = false;
4408 // signal-chaining
4409 if (UseSignalChaining) {
4410 struct sigaction *actp = get_chained_signal_action(sig);
4411 if (actp != NULL) {
4412 chained = call_chained_handler(actp, sig, siginfo, context);
4413 }
4414 }
4415 return chained;
4416 }
4417
4418 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4419 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4420 if (preinstalled_sigs[sig] != 0) {
4421 return &chainedsigactions[sig];
4422 }
4423 return NULL;
4424 }
4425
4426 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
4427
4428 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4429 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4430 chainedsigactions[sig] = oldAct;
4431 preinstalled_sigs[sig] = 1;
4432 }
4433
4434 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
4435 // Check for overwrite.
4436 struct sigaction oldAct;
4437 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4438 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4439 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4440 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4441 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4442 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4443 if (AllowUserSignalHandlers || !set_installed) {
4444 // Do not overwrite; user takes responsibility to forward to us.
4445 return;
4446 } else if (UseSignalChaining) {
4447 if (oktochain) {
4448 // save the old handler in jvm
4449 save_preinstalled_handler(sig, oldAct);
4450 } else {
4451 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4452 }
4453 // libjsig also interposes the sigaction() call below and saves the
4454 // old sigaction on it own.
4455 } else {
4456 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4457 "%#lx for signal %d.", (long)oldhand, sig));
4458 }
4459 }
4460
4461 struct sigaction sigAct;
4462 sigfillset(&(sigAct.sa_mask));
4463 sigAct.sa_handler = SIG_DFL;
4464
4465 sigAct.sa_sigaction = signalHandler;
4466 // Handle SIGSEGV on alternate signal stack if
4467 // not using stack banging
4468 if (!UseStackBanging && sig == SIGSEGV) {
4469 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4470 // Interruptible i/o requires SA_RESTART cleared so EINTR
4471 // is returned instead of restarting system calls
4472 } else if (sig == os::Solaris::SIGinterrupt()) {
4473 sigemptyset(&sigAct.sa_mask);
4474 sigAct.sa_handler = NULL;
4475 sigAct.sa_flags = SA_SIGINFO;
4476 sigAct.sa_sigaction = sigINTRHandler;
4477 } else {
4478 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4479 }
4480 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4481
4482 sigaction(sig, &sigAct, &oldAct);
4483
4484 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4485 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4486 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4487 }
4488
4489
4490 #define DO_SIGNAL_CHECK(sig) \
4491 if (!sigismember(&check_signal_done, sig)) \
4492 os::Solaris::check_signal_handler(sig)
4493
4494 // This method is a periodic task to check for misbehaving JNI applications
4495 // under CheckJNI, we can add any periodic checks here
4496
4497 void os::run_periodic_checks() {
4498 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4499 // thereby preventing a NULL checks.
4500 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
4501
4502 if (check_signals == false) return;
4503
4504 // SEGV and BUS if overridden could potentially prevent
4505 // generation of hs*.log in the event of a crash, debugging
4506 // such a case can be very challenging, so we absolutely
4507 // check for the following for a good measure:
4508 DO_SIGNAL_CHECK(SIGSEGV);
4509 DO_SIGNAL_CHECK(SIGILL);
4510 DO_SIGNAL_CHECK(SIGFPE);
4511 DO_SIGNAL_CHECK(SIGBUS);
4512 DO_SIGNAL_CHECK(SIGPIPE);
4513 DO_SIGNAL_CHECK(SIGXFSZ);
4514
4515 // ReduceSignalUsage allows the user to override these handlers
4516 // see comments at the very top and jvm_solaris.h
4517 if (!ReduceSignalUsage) {
4518 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4519 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4520 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4521 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4522 }
4523
4524 // See comments above for using JVM1/JVM2 and UseAltSigs
4525 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4526 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4527
4528 }
4529
4530 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4531
4532 static os_sigaction_t os_sigaction = NULL;
4533
4534 void os::Solaris::check_signal_handler(int sig) {
4535 char buf[O_BUFLEN];
4536 address jvmHandler = NULL;
4537
4538 struct sigaction act;
4539 if (os_sigaction == NULL) {
4540 // only trust the default sigaction, in case it has been interposed
4541 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4542 if (os_sigaction == NULL) return;
4543 }
4544
4545 os_sigaction(sig, (struct sigaction*)NULL, &act);
4546
4547 address thisHandler = (act.sa_flags & SA_SIGINFO)
4548 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4549 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
4550
4551
4552 switch(sig) {
4553 case SIGSEGV:
4554 case SIGBUS:
4555 case SIGFPE:
4556 case SIGPIPE:
4557 case SIGXFSZ:
4558 case SIGILL:
4559 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4560 break;
4561
4562 case SHUTDOWN1_SIGNAL:
4563 case SHUTDOWN2_SIGNAL:
4564 case SHUTDOWN3_SIGNAL:
4565 case BREAK_SIGNAL:
4566 jvmHandler = (address)user_handler();
4567 break;
4568
4569 default:
4570 int intrsig = os::Solaris::SIGinterrupt();
4571 int asynsig = os::Solaris::SIGasync();
4572
4573 if (sig == intrsig) {
4574 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4575 } else if (sig == asynsig) {
4576 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4577 } else {
4578 return;
4579 }
4580 break;
4581 }
4582
4583
4584 if (thisHandler != jvmHandler) {
4585 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4586 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4587 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4588 // No need to check this sig any longer
4589 sigaddset(&check_signal_done, sig);
4590 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4591 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4592 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4593 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4594 // No need to check this sig any longer
4595 sigaddset(&check_signal_done, sig);
4596 }
4597
4598 // Print all the signal handler state
4599 if (sigismember(&check_signal_done, sig)) {
4600 print_signal_handlers(tty, buf, O_BUFLEN);
4601 }
4602
4603 }
4604
4605 void os::Solaris::install_signal_handlers() {
4606 bool libjsigdone = false;
4607 signal_handlers_are_installed = true;
4608
4609 // signal-chaining
4610 typedef void (*signal_setting_t)();
4611 signal_setting_t begin_signal_setting = NULL;
4612 signal_setting_t end_signal_setting = NULL;
4613 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4614 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4615 if (begin_signal_setting != NULL) {
4616 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4617 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4618 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4619 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4620 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4621 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4622 libjsig_is_loaded = true;
4623 if (os::Solaris::get_libjsig_version != NULL) {
4624 libjsigversion = (*os::Solaris::get_libjsig_version)();
4625 }
4626 assert(UseSignalChaining, "should enable signal-chaining");
4627 }
4628 if (libjsig_is_loaded) {
4629 // Tell libjsig jvm is setting signal handlers
4630 (*begin_signal_setting)();
4631 }
4632
4633 set_signal_handler(SIGSEGV, true, true);
4634 set_signal_handler(SIGPIPE, true, true);
4635 set_signal_handler(SIGXFSZ, true, true);
4636 set_signal_handler(SIGBUS, true, true);
4637 set_signal_handler(SIGILL, true, true);
4638 set_signal_handler(SIGFPE, true, true);
4639
4640
4641 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4642
4643 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4644 // can not register overridable signals which might be > 32
4645 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4646 // Tell libjsig jvm has finished setting signal handlers
4647 (*end_signal_setting)();
4648 libjsigdone = true;
4649 }
4650 }
4651
4652 // Never ok to chain our SIGinterrupt
4653 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4654 set_signal_handler(os::Solaris::SIGasync(), true, true);
4655
4656 if (libjsig_is_loaded && !libjsigdone) {
4657 // Tell libjsig jvm finishes setting signal handlers
4658 (*end_signal_setting)();
4659 }
4660
4661 // We don't activate signal checker if libjsig is in place, we trust ourselves
4662 // and if UserSignalHandler is installed all bets are off.
4663 // Log that signal checking is off only if -verbose:jni is specified.
4664 if (CheckJNICalls) {
4665 if (libjsig_is_loaded) {
4666 if (PrintJNIResolving) {
4667 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4668 }
4669 check_signals = false;
4670 }
4671 if (AllowUserSignalHandlers) {
4672 if (PrintJNIResolving) {
4673 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4674 }
4675 check_signals = false;
4676 }
4677 }
4678 }
4679
4680
4681 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
4682
4683 const char * signames[] = {
4684 "SIG0",
4685 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4686 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4687 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4688 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4689 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4690 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4691 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4692 "SIGCANCEL", "SIGLOST"
4693 };
4694
4695 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4696 if (0 < exception_code && exception_code <= SIGRTMAX) {
4697 // signal
4698 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4699 jio_snprintf(buf, size, "%s", signames[exception_code]);
4700 } else {
4701 jio_snprintf(buf, size, "SIG%d", exception_code);
4702 }
4703 return buf;
4704 } else {
4705 return NULL;
4706 }
4707 }
4708
4709 // (Static) wrappers for the new libthread API
4710 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
4711 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
4712 int_fnP_thread_t_i os::Solaris::_thr_setmutator;
4713 int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
4714 int_fnP_thread_t os::Solaris::_thr_continue_mutator;
4715
4716 // (Static) wrapper for getisax(2) call.
4717 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4718
4719 // (Static) wrappers for the liblgrp API
4720 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4721 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4722 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4723 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4724 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4725 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4726 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4727 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4728 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4729
4730 // (Static) wrapper for meminfo() call.
4731 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4732
4733 static address resolve_symbol_lazy(const char* name) {
4734 address addr = (address) dlsym(RTLD_DEFAULT, name);
4735 if(addr == NULL) {
4736 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4737 addr = (address) dlsym(RTLD_NEXT, name);
4738 }
4739 return addr;
4740 }
4741
4742 static address resolve_symbol(const char* name) {
4743 address addr = resolve_symbol_lazy(name);
4744 if(addr == NULL) {
4745 fatal(dlerror());
4746 }
4747 return addr;
4748 }
4749
4750
4751
4752 // isT2_libthread()
4753 //
4754 // Routine to determine if we are currently using the new T2 libthread.
4755 //
4756 // We determine if we are using T2 by reading /proc/self/lstatus and
4757 // looking for a thread with the ASLWP bit set. If we find this status
4758 // bit set, we must assume that we are NOT using T2. The T2 team
4759 // has approved this algorithm.
4760 //
4761 // We need to determine if we are running with the new T2 libthread
4762 // since setting native thread priorities is handled differently
4763 // when using this library. All threads created using T2 are bound
4764 // threads. Calling thr_setprio is meaningless in this case.
4765 //
4766 bool isT2_libthread() {
4767 static prheader_t * lwpArray = NULL;
4768 static int lwpSize = 0;
4769 static int lwpFile = -1;
4770 lwpstatus_t * that;
4771 char lwpName [128];
4772 bool isT2 = false;
4773
4774 #define ADR(x) ((uintptr_t)(x))
4775 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
4776
4777 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0);
4778 if (lwpFile < 0) {
4779 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n");
4780 return false;
4781 }
4782 lwpSize = 16*1024;
4783 for (;;) {
4784 ::lseek64 (lwpFile, 0, SEEK_SET);
4785 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize, mtInternal);
4786 if (::read(lwpFile, lwpArray, lwpSize) < 0) {
4787 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n");
4788 break;
4789 }
4790 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
4791 // We got a good snapshot - now iterate over the list.
4792 int aslwpcount = 0;
4793 for (int i = 0; i < lwpArray->pr_nent; i++ ) {
4794 that = LWPINDEX(lwpArray,i);
4795 if (that->pr_flags & PR_ASLWP) {
4796 aslwpcount++;
4797 }
4798 }
4799 if (aslwpcount == 0) isT2 = true;
4800 break;
4801 }
4802 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
4803 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); // retry.
4804 }
4805
4806 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal);
4807 ::close (lwpFile);
4808 if (ThreadPriorityVerbose) {
4809 if (isT2) tty->print_cr("We are running with a T2 libthread\n");
4810 else tty->print_cr("We are not running with a T2 libthread\n");
4811 }
4812 return isT2;
4813 }
4814
4815
4816 void os::Solaris::libthread_init() {
4817 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4818
4819 // Determine if we are running with the new T2 libthread
4820 os::Solaris::set_T2_libthread(isT2_libthread());
4821
4822 lwp_priocntl_init();
4823
4824 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4825 if(func == NULL) {
4826 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4827 // Guarantee that this VM is running on an new enough OS (5.6 or
4828 // later) that it will have a new enough libthread.so.
4829 guarantee(func != NULL, "libthread.so is too old.");
4830 }
4831
4832 // Initialize the new libthread getstate API wrappers
4833 func = resolve_symbol("thr_getstate");
4834 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
4835
4836 func = resolve_symbol("thr_setstate");
4837 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
4838
4839 func = resolve_symbol("thr_setmutator");
4840 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
4841
4842 func = resolve_symbol("thr_suspend_mutator");
4843 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4844
4845 func = resolve_symbol("thr_continue_mutator");
4846 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4847
4848 int size;
4849 void (*handler_info_func)(address *, int *);
4850 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4851 handler_info_func(&handler_start, &size);
4852 handler_end = handler_start + size;
4853 }
4854
4855
4856 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4857 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4858 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4859 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4860 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4861 int os::Solaris::_mutex_scope = USYNC_THREAD;
4862
4863 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4864 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4865 int_fnP_cond_tP os::Solaris::_cond_signal;
4866 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4867 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4868 int_fnP_cond_tP os::Solaris::_cond_destroy;
4869 int os::Solaris::_cond_scope = USYNC_THREAD;
4870
4871 void os::Solaris::synchronization_init() {
4872 if(UseLWPSynchronization) {
4873 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4874 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4875 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4876 os::Solaris::set_mutex_init(lwp_mutex_init);
4877 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4878 os::Solaris::set_mutex_scope(USYNC_THREAD);
4879
4880 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4881 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4882 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4883 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4884 os::Solaris::set_cond_init(lwp_cond_init);
4885 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4886 os::Solaris::set_cond_scope(USYNC_THREAD);
4887 }
4888 else {
4889 os::Solaris::set_mutex_scope(USYNC_THREAD);
4890 os::Solaris::set_cond_scope(USYNC_THREAD);
4891
4892 if(UsePthreads) {
4893 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4894 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4895 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4896 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4897 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4898
4899 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4900 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4901 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4902 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4903 os::Solaris::set_cond_init(pthread_cond_default_init);
4904 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4905 }
4906 else {
4907 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4908 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4909 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4910 os::Solaris::set_mutex_init(::mutex_init);
4911 os::Solaris::set_mutex_destroy(::mutex_destroy);
4912
4913 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4914 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4915 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4916 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4917 os::Solaris::set_cond_init(::cond_init);
4918 os::Solaris::set_cond_destroy(::cond_destroy);
4919 }
4920 }
4921 }
4922
4923 bool os::Solaris::liblgrp_init() {
4924 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4925 if (handle != NULL) {
4926 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4927 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4928 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4929 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4930 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4931 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4932 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4933 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4934 dlsym(handle, "lgrp_cookie_stale")));
4935
4936 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4937 set_lgrp_cookie(c);
4938 return true;
4939 }
4940 return false;
4941 }
4942
4943 void os::Solaris::misc_sym_init() {
4944 address func;
4945
4946 // getisax
4947 func = resolve_symbol_lazy("getisax");
4948 if (func != NULL) {
4949 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4950 }
4951
4952 // meminfo
4953 func = resolve_symbol_lazy("meminfo");
4954 if (func != NULL) {
4955 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4956 }
4957 }
4958
4959 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4960 assert(_getisax != NULL, "_getisax not set");
4961 return _getisax(array, n);
4962 }
4963
4964 // Symbol doesn't exist in Solaris 8 pset.h
4965 #ifndef PS_MYID
4966 #define PS_MYID -3
4967 #endif
4968
4969 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4970 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4971 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4972
4973 void init_pset_getloadavg_ptr(void) {
4974 pset_getloadavg_ptr =
4975 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4976 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4977 warning("pset_getloadavg function not found");
4978 }
4979 }
4980
4981 int os::Solaris::_dev_zero_fd = -1;
4982
4983 // this is called _before_ the global arguments have been parsed
4984 void os::init(void) {
4985 _initial_pid = getpid();
4986
4987 max_hrtime = first_hrtime = gethrtime();
4988
4989 init_random(1234567);
4990
4991 page_size = sysconf(_SC_PAGESIZE);
4992 if (page_size == -1)
4993 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4994 strerror(errno)));
4995 init_page_sizes((size_t) page_size);
4996
4997 Solaris::initialize_system_info();
4998
4999 // Initialize misc. symbols as soon as possible, so we can use them
5000 // if we need them.
5001 Solaris::misc_sym_init();
5002
5003 int fd = ::open("/dev/zero", O_RDWR);
5004 if (fd < 0) {
5005 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
5006 } else {
5007 Solaris::set_dev_zero_fd(fd);
5008
5009 // Close on exec, child won't inherit.
5010 fcntl(fd, F_SETFD, FD_CLOEXEC);
5011 }
5012
5013 clock_tics_per_sec = CLK_TCK;
5014
5015 // check if dladdr1() exists; dladdr1 can provide more information than
5016 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
5017 // and is available on linker patches for 5.7 and 5.8.
5018 // libdl.so must have been loaded, this call is just an entry lookup
5019 void * hdl = dlopen("libdl.so", RTLD_NOW);
5020 if (hdl)
5021 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
5022
5023 // (Solaris only) this switches to calls that actually do locking.
5024 ThreadCritical::initialize();
5025
5026 main_thread = thr_self();
5027
5028 // Constant minimum stack size allowed. It must be at least
5029 // the minimum of what the OS supports (thr_min_stack()), and
5030 // enough to allow the thread to get to user bytecode execution.
5031 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
5032 // If the pagesize of the VM is greater than 8K determine the appropriate
5033 // number of initial guard pages. The user can change this with the
5034 // command line arguments, if needed.
5035 if (vm_page_size() > 8*K) {
5036 StackYellowPages = 1;
5037 StackRedPages = 1;
5038 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
5039 }
5040 }
5041
5042 // To install functions for atexit system call
5043 extern "C" {
5044 static void perfMemory_exit_helper() {
5045 perfMemory_exit();
5046 }
5047 }
5048
5049 // this is called _after_ the global arguments have been parsed
5050 jint os::init_2(void) {
5051 // try to enable extended file IO ASAP, see 6431278
5052 os::Solaris::try_enable_extended_io();
5053
5054 // Allocate a single page and mark it as readable for safepoint polling. Also
5055 // use this first mmap call to check support for MAP_ALIGN.
5056 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
5057 page_size,
5058 MAP_PRIVATE | MAP_ALIGN,
5059 PROT_READ);
5060 if (polling_page == NULL) {
5061 has_map_align = false;
5062 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
5063 PROT_READ);
5064 }
5065
5066 os::set_polling_page(polling_page);
5067
5068 #ifndef PRODUCT
5069 if( Verbose && PrintMiscellaneous )
5070 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
5071 #endif
5072
5073 if (!UseMembar) {
5074 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
5075 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
5076 os::set_memory_serialize_page( mem_serialize_page );
5077
5078 #ifndef PRODUCT
5079 if(Verbose && PrintMiscellaneous)
5080 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
5081 #endif
5082 }
5083
5084 os::large_page_init();
5085
5086 // Check minimum allowable stack size for thread creation and to initialize
5087 // the java system classes, including StackOverflowError - depends on page
5088 // size. Add a page for compiler2 recursion in main thread.
5089 // Add in 2*BytesPerWord times page size to account for VM stack during
5090 // class initialization depending on 32 or 64 bit VM.
5091 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
5092 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
5093 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
5094
5095 size_t threadStackSizeInBytes = ThreadStackSize * K;
5096 if (threadStackSizeInBytes != 0 &&
5097 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
5098 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
5099 os::Solaris::min_stack_allowed/K);
5100 return JNI_ERR;
5101 }
5102
5103 // For 64kbps there will be a 64kb page size, which makes
5104 // the usable default stack size quite a bit less. Increase the
5105 // stack for 64kb (or any > than 8kb) pages, this increases
5106 // virtual memory fragmentation (since we're not creating the
5107 // stack on a power of 2 boundary. The real fix for this
5108 // should be to fix the guard page mechanism.
5109
5110 if (vm_page_size() > 8*K) {
5111 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
5112 ? threadStackSizeInBytes +
5113 ((StackYellowPages + StackRedPages) * vm_page_size())
5114 : 0;
5115 ThreadStackSize = threadStackSizeInBytes/K;
5116 }
5117
5118 // Make the stack size a multiple of the page size so that
5119 // the yellow/red zones can be guarded.
5120 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
5121 vm_page_size()));
5122
5123 Solaris::libthread_init();
5124
5125 if (UseNUMA) {
5126 if (!Solaris::liblgrp_init()) {
5127 UseNUMA = false;
5128 } else {
5129 size_t lgrp_limit = os::numa_get_groups_num();
5130 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
5131 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
5132 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal);
5133 if (lgrp_num < 2) {
5134 // There's only one locality group, disable NUMA.
5135 UseNUMA = false;
5136 }
5137 }
5138 // ISM is not compatible with the NUMA allocator - it always allocates
5139 // pages round-robin across the lgroups.
5140 if (UseNUMA && UseLargePages && UseISM) {
5141 if (!FLAG_IS_DEFAULT(UseNUMA)) {
5142 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) {
5143 UseLargePages = false;
5144 } else {
5145 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator");
5146 UseNUMA = false;
5147 }
5148 } else {
5149 UseNUMA = false;
5150 }
5151 }
5152 if (!UseNUMA && ForceNUMA) {
5153 UseNUMA = true;
5154 }
5155 }
5156
5157 Solaris::signal_sets_init();
5158 Solaris::init_signal_mem();
5159 Solaris::install_signal_handlers();
5160
5161 if (libjsigversion < JSIG_VERSION_1_4_1) {
5162 Maxlibjsigsigs = OLDMAXSIGNUM;
5163 }
5164
5165 // initialize synchronization primitives to use either thread or
5166 // lwp synchronization (controlled by UseLWPSynchronization)
5167 Solaris::synchronization_init();
5168
5169 if (MaxFDLimit) {
5170 // set the number of file descriptors to max. print out error
5171 // if getrlimit/setrlimit fails but continue regardless.
5172 struct rlimit nbr_files;
5173 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
5174 if (status != 0) {
5175 if (PrintMiscellaneous && (Verbose || WizardMode))
5176 perror("os::init_2 getrlimit failed");
5177 } else {
5178 nbr_files.rlim_cur = nbr_files.rlim_max;
5179 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
5180 if (status != 0) {
5181 if (PrintMiscellaneous && (Verbose || WizardMode))
5182 perror("os::init_2 setrlimit failed");
5183 }
5184 }
5185 }
5186
5187 // Calculate theoretical max. size of Threads to guard gainst
5188 // artifical out-of-memory situations, where all available address-
5189 // space has been reserved by thread stacks. Default stack size is 1Mb.
5190 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
5191 JavaThread::stack_size_at_create() : (1*K*K);
5192 assert(pre_thread_stack_size != 0, "Must have a stack");
5193 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
5194 // we should start doing Virtual Memory banging. Currently when the threads will
5195 // have used all but 200Mb of space.
5196 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
5197 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
5198
5199 // at-exit methods are called in the reverse order of their registration.
5200 // In Solaris 7 and earlier, atexit functions are called on return from
5201 // main or as a result of a call to exit(3C). There can be only 32 of
5202 // these functions registered and atexit() does not set errno. In Solaris
5203 // 8 and later, there is no limit to the number of functions registered
5204 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
5205 // functions are called upon dlclose(3DL) in addition to return from main
5206 // and exit(3C).
5207
5208 if (PerfAllowAtExitRegistration) {
5209 // only register atexit functions if PerfAllowAtExitRegistration is set.
5210 // atexit functions can be delayed until process exit time, which
5211 // can be problematic for embedded VM situations. Embedded VMs should
5212 // call DestroyJavaVM() to assure that VM resources are released.
5213
5214 // note: perfMemory_exit_helper atexit function may be removed in
5215 // the future if the appropriate cleanup code can be added to the
5216 // VM_Exit VMOperation's doit method.
5217 if (atexit(perfMemory_exit_helper) != 0) {
5218 warning("os::init2 atexit(perfMemory_exit_helper) failed");
5219 }
5220 }
5221
5222 // Init pset_loadavg function pointer
5223 init_pset_getloadavg_ptr();
5224
5225 return JNI_OK;
5226 }
5227
5228 void os::init_3(void) {
5229 return;
5230 }
5231
5232 // Mark the polling page as unreadable
5233 void os::make_polling_page_unreadable(void) {
5234 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
5235 fatal("Could not disable polling page");
5236 };
5237
5238 // Mark the polling page as readable
5239 void os::make_polling_page_readable(void) {
5240 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
5241 fatal("Could not enable polling page");
5242 };
5243
5244 // OS interface.
5245
5246 bool os::check_heap(bool force) { return true; }
5247
5248 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
5249 static vsnprintf_t sol_vsnprintf = NULL;
5250
5251 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
5252 if (!sol_vsnprintf) {
5253 //search for the named symbol in the objects that were loaded after libjvm
5254 void* where = RTLD_NEXT;
5255 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5256 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5257 if (!sol_vsnprintf){
5258 //search for the named symbol in the objects that were loaded before libjvm
5259 where = RTLD_DEFAULT;
5260 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5261 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5262 assert(sol_vsnprintf != NULL, "vsnprintf not found");
5263 }
5264 }
5265 return (*sol_vsnprintf)(buf, count, fmt, argptr);
5266 }
5267
5268
5269 // Is a (classpath) directory empty?
5270 bool os::dir_is_empty(const char* path) {
5271 DIR *dir = NULL;
5272 struct dirent *ptr;
5273
5274 dir = opendir(path);
5275 if (dir == NULL) return true;
5276
5277 /* Scan the directory */
5278 bool result = true;
5279 char buf[sizeof(struct dirent) + MAX_PATH];
5280 struct dirent *dbuf = (struct dirent *) buf;
5281 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
5282 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
5283 result = false;
5284 }
5285 }
5286 closedir(dir);
5287 return result;
5288 }
5289
5290 // This code originates from JDK's sysOpen and open64_w
5291 // from src/solaris/hpi/src/system_md.c
5292
5293 #ifndef O_DELETE
5294 #define O_DELETE 0x10000
5295 #endif
5296
5297 // Open a file. Unlink the file immediately after open returns
5298 // if the specified oflag has the O_DELETE flag set.
5299 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
5300
5301 int os::open(const char *path, int oflag, int mode) {
5302 if (strlen(path) > MAX_PATH - 1) {
5303 errno = ENAMETOOLONG;
5304 return -1;
5305 }
5306 int fd;
5307 int o_delete = (oflag & O_DELETE);
5308 oflag = oflag & ~O_DELETE;
5309
5310 fd = ::open64(path, oflag, mode);
5311 if (fd == -1) return -1;
5312
5313 //If the open succeeded, the file might still be a directory
5314 {
5315 struct stat64 buf64;
5316 int ret = ::fstat64(fd, &buf64);
5317 int st_mode = buf64.st_mode;
5318
5319 if (ret != -1) {
5320 if ((st_mode & S_IFMT) == S_IFDIR) {
5321 errno = EISDIR;
5322 ::close(fd);
5323 return -1;
5324 }
5325 } else {
5326 ::close(fd);
5327 return -1;
5328 }
5329 }
5330 /*
5331 * 32-bit Solaris systems suffer from:
5332 *
5333 * - an historical default soft limit of 256 per-process file
5334 * descriptors that is too low for many Java programs.
5335 *
5336 * - a design flaw where file descriptors created using stdio
5337 * fopen must be less than 256, _even_ when the first limit above
5338 * has been raised. This can cause calls to fopen (but not calls to
5339 * open, for example) to fail mysteriously, perhaps in 3rd party
5340 * native code (although the JDK itself uses fopen). One can hardly
5341 * criticize them for using this most standard of all functions.
5342 *
5343 * We attempt to make everything work anyways by:
5344 *
5345 * - raising the soft limit on per-process file descriptors beyond
5346 * 256
5347 *
5348 * - As of Solaris 10u4, we can request that Solaris raise the 256
5349 * stdio fopen limit by calling function enable_extended_FILE_stdio.
5350 * This is done in init_2 and recorded in enabled_extended_FILE_stdio
5351 *
5352 * - If we are stuck on an old (pre 10u4) Solaris system, we can
5353 * workaround the bug by remapping non-stdio file descriptors below
5354 * 256 to ones beyond 256, which is done below.
5355 *
5356 * See:
5357 * 1085341: 32-bit stdio routines should support file descriptors >255
5358 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files
5359 * 6431278: Netbeans crash on 32 bit Solaris: need to call
5360 * enable_extended_FILE_stdio() in VM initialisation
5361 * Giri Mandalika's blog
5362 * http://technopark02.blogspot.com/2005_05_01_archive.html
5363 */
5364 #ifndef _LP64
5365 if ((!enabled_extended_FILE_stdio) && fd < 256) {
5366 int newfd = ::fcntl(fd, F_DUPFD, 256);
5367 if (newfd != -1) {
5368 ::close(fd);
5369 fd = newfd;
5370 }
5371 }
5372 #endif // 32-bit Solaris
5373 /*
5374 * All file descriptors that are opened in the JVM and not
5375 * specifically destined for a subprocess should have the
5376 * close-on-exec flag set. If we don't set it, then careless 3rd
5377 * party native code might fork and exec without closing all
5378 * appropriate file descriptors (e.g. as we do in closeDescriptors in
5379 * UNIXProcess.c), and this in turn might:
5380 *
5381 * - cause end-of-file to fail to be detected on some file
5382 * descriptors, resulting in mysterious hangs, or
5383 *
5384 * - might cause an fopen in the subprocess to fail on a system
5385 * suffering from bug 1085341.
5386 *
5387 * (Yes, the default setting of the close-on-exec flag is a Unix
5388 * design flaw)
5389 *
5390 * See:
5391 * 1085341: 32-bit stdio routines should support file descriptors >255
5392 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
5393 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
5394 */
5395 #ifdef FD_CLOEXEC
5396 {
5397 int flags = ::fcntl(fd, F_GETFD);
5398 if (flags != -1)
5399 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
5400 }
5401 #endif
5402
5403 if (o_delete != 0) {
5404 ::unlink(path);
5405 }
5406 return fd;
5407 }
5408
5409 // create binary file, rewriting existing file if required
5410 int os::create_binary_file(const char* path, bool rewrite_existing) {
5411 int oflags = O_WRONLY | O_CREAT;
5412 if (!rewrite_existing) {
5413 oflags |= O_EXCL;
5414 }
5415 return ::open64(path, oflags, S_IREAD | S_IWRITE);
5416 }
5417
5418 // return current position of file pointer
5419 jlong os::current_file_offset(int fd) {
5420 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
5421 }
5422
5423 // move file pointer to the specified offset
5424 jlong os::seek_to_file_offset(int fd, jlong offset) {
5425 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
5426 }
5427
5428 jlong os::lseek(int fd, jlong offset, int whence) {
5429 return (jlong) ::lseek64(fd, offset, whence);
5430 }
5431
5432 char * os::native_path(char *path) {
5433 return path;
5434 }
5435
5436 int os::ftruncate(int fd, jlong length) {
5437 return ::ftruncate64(fd, length);
5438 }
5439
5440 int os::fsync(int fd) {
5441 RESTARTABLE_RETURN_INT(::fsync(fd));
5442 }
5443
5444 int os::available(int fd, jlong *bytes) {
5445 jlong cur, end;
5446 int mode;
5447 struct stat64 buf64;
5448
5449 if (::fstat64(fd, &buf64) >= 0) {
5450 mode = buf64.st_mode;
5451 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
5452 /*
5453 * XXX: is the following call interruptible? If so, this might
5454 * need to go through the INTERRUPT_IO() wrapper as for other
5455 * blocking, interruptible calls in this file.
5456 */
5457 int n,ioctl_return;
5458
5459 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted);
5460 if (ioctl_return>= 0) {
5461 *bytes = n;
5462 return 1;
5463 }
5464 }
5465 }
5466 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
5467 return 0;
5468 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
5469 return 0;
5470 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
5471 return 0;
5472 }
5473 *bytes = end - cur;
5474 return 1;
5475 }
5476
5477 // Map a block of memory.
5478 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
5479 char *addr, size_t bytes, bool read_only,
5480 bool allow_exec) {
5481 int prot;
5482 int flags;
5483
5484 if (read_only) {
5485 prot = PROT_READ;
5486 flags = MAP_SHARED;
5487 } else {
5488 prot = PROT_READ | PROT_WRITE;
5489 flags = MAP_PRIVATE;
5490 }
5491
5492 if (allow_exec) {
5493 prot |= PROT_EXEC;
5494 }
5495
5496 if (addr != NULL) {
5497 flags |= MAP_FIXED;
5498 }
5499
5500 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5501 fd, file_offset);
5502 if (mapped_address == MAP_FAILED) {
5503 return NULL;
5504 }
5505 return mapped_address;
5506 }
5507
5508
5509 // Remap a block of memory.
5510 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5511 char *addr, size_t bytes, bool read_only,
5512 bool allow_exec) {
5513 // same as map_memory() on this OS
5514 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5515 allow_exec);
5516 }
5517
5518
5519 // Unmap a block of memory.
5520 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5521 return munmap(addr, bytes) == 0;
5522 }
5523
5524 void os::pause() {
5525 char filename[MAX_PATH];
5526 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5527 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5528 } else {
5529 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5530 }
5531
5532 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5533 if (fd != -1) {
5534 struct stat buf;
5535 ::close(fd);
5536 while (::stat(filename, &buf) == 0) {
5537 (void)::poll(NULL, 0, 100);
5538 }
5539 } else {
5540 jio_fprintf(stderr,
5541 "Could not open pause file '%s', continuing immediately.\n", filename);
5542 }
5543 }
5544
5545 void os::deallocate_pages() {
5546 // Unimplemented.
5547 }
5548
5549 #ifndef PRODUCT
5550 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5551 // Turn this on if you need to trace synch operations.
5552 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5553 // and call record_synch_enable and record_synch_disable
5554 // around the computation of interest.
5555
5556 void record_synch(char* name, bool returning); // defined below
5557
5558 class RecordSynch {
5559 char* _name;
5560 public:
5561 RecordSynch(char* name) :_name(name)
5562 { record_synch(_name, false); }
5563 ~RecordSynch() { record_synch(_name, true); }
5564 };
5565
5566 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5567 extern "C" ret name params { \
5568 typedef ret name##_t params; \
5569 static name##_t* implem = NULL; \
5570 static int callcount = 0; \
5571 if (implem == NULL) { \
5572 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5573 if (implem == NULL) fatal(dlerror()); \
5574 } \
5575 ++callcount; \
5576 RecordSynch _rs(#name); \
5577 inner; \
5578 return implem args; \
5579 }
5580 // in dbx, examine callcounts this way:
5581 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5582
5583 #define CHECK_POINTER_OK(p) \
5584 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5585 #define CHECK_MU \
5586 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5587 #define CHECK_CV \
5588 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5589 #define CHECK_P(p) \
5590 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5591
5592 #define CHECK_MUTEX(mutex_op) \
5593 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5594
5595 CHECK_MUTEX( mutex_lock)
5596 CHECK_MUTEX( _mutex_lock)
5597 CHECK_MUTEX( mutex_unlock)
5598 CHECK_MUTEX(_mutex_unlock)
5599 CHECK_MUTEX( mutex_trylock)
5600 CHECK_MUTEX(_mutex_trylock)
5601
5602 #define CHECK_COND(cond_op) \
5603 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
5604
5605 CHECK_COND( cond_wait);
5606 CHECK_COND(_cond_wait);
5607 CHECK_COND(_cond_wait_cancel);
5608
5609 #define CHECK_COND2(cond_op) \
5610 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
5611
5612 CHECK_COND2( cond_timedwait);
5613 CHECK_COND2(_cond_timedwait);
5614 CHECK_COND2(_cond_timedwait_cancel);
5615
5616 // do the _lwp_* versions too
5617 #define mutex_t lwp_mutex_t
5618 #define cond_t lwp_cond_t
5619 CHECK_MUTEX( _lwp_mutex_lock)
5620 CHECK_MUTEX( _lwp_mutex_unlock)
5621 CHECK_MUTEX( _lwp_mutex_trylock)
5622 CHECK_MUTEX( __lwp_mutex_lock)
5623 CHECK_MUTEX( __lwp_mutex_unlock)
5624 CHECK_MUTEX( __lwp_mutex_trylock)
5625 CHECK_MUTEX(___lwp_mutex_lock)
5626 CHECK_MUTEX(___lwp_mutex_unlock)
5627
5628 CHECK_COND( _lwp_cond_wait);
5629 CHECK_COND( __lwp_cond_wait);
5630 CHECK_COND(___lwp_cond_wait);
5631
5632 CHECK_COND2( _lwp_cond_timedwait);
5633 CHECK_COND2( __lwp_cond_timedwait);
5634 #undef mutex_t
5635 #undef cond_t
5636
5637 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5638 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5639 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5640 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5641 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5642 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5643 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5644 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5645
5646
5647 // recording machinery:
5648
5649 enum { RECORD_SYNCH_LIMIT = 200 };
5650 char* record_synch_name[RECORD_SYNCH_LIMIT];
5651 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5652 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5653 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5654 int record_synch_count = 0;
5655 bool record_synch_enabled = false;
5656
5657 // in dbx, examine recorded data this way:
5658 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5659
5660 void record_synch(char* name, bool returning) {
5661 if (record_synch_enabled) {
5662 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5663 record_synch_name[record_synch_count] = name;
5664 record_synch_returning[record_synch_count] = returning;
5665 record_synch_thread[record_synch_count] = thr_self();
5666 record_synch_arg0ptr[record_synch_count] = &name;
5667 record_synch_count++;
5668 }
5669 // put more checking code here:
5670 // ...
5671 }
5672 }
5673
5674 void record_synch_enable() {
5675 // start collecting trace data, if not already doing so
5676 if (!record_synch_enabled) record_synch_count = 0;
5677 record_synch_enabled = true;
5678 }
5679
5680 void record_synch_disable() {
5681 // stop collecting trace data
5682 record_synch_enabled = false;
5683 }
5684
5685 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5686 #endif // PRODUCT
5687
5688 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5689 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5690 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5691
5692
5693 // JVMTI & JVM monitoring and management support
5694 // The thread_cpu_time() and current_thread_cpu_time() are only
5695 // supported if is_thread_cpu_time_supported() returns true.
5696 // They are not supported on Solaris T1.
5697
5698 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5699 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5700 // of a thread.
5701 //
5702 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5703 // returns the fast estimate available on the platform.
5704
5705 // hrtime_t gethrvtime() return value includes
5706 // user time but does not include system time
5707 jlong os::current_thread_cpu_time() {
5708 return (jlong) gethrvtime();
5709 }
5710
5711 jlong os::thread_cpu_time(Thread *thread) {
5712 // return user level CPU time only to be consistent with
5713 // what current_thread_cpu_time returns.
5714 // thread_cpu_time_info() must be changed if this changes
5715 return os::thread_cpu_time(thread, false /* user time only */);
5716 }
5717
5718 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5719 if (user_sys_cpu_time) {
5720 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5721 } else {
5722 return os::current_thread_cpu_time();
5723 }
5724 }
5725
5726 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5727 char proc_name[64];
5728 int count;
5729 prusage_t prusage;
5730 jlong lwp_time;
5731 int fd;
5732
5733 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5734 getpid(),
5735 thread->osthread()->lwp_id());
5736 fd = ::open(proc_name, O_RDONLY);
5737 if ( fd == -1 ) return -1;
5738
5739 do {
5740 count = ::pread(fd,
5741 (void *)&prusage.pr_utime,
5742 thr_time_size,
5743 thr_time_off);
5744 } while (count < 0 && errno == EINTR);
5745 ::close(fd);
5746 if ( count < 0 ) return -1;
5747
5748 if (user_sys_cpu_time) {
5749 // user + system CPU time
5750 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5751 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5752 (jlong)prusage.pr_stime.tv_nsec +
5753 (jlong)prusage.pr_utime.tv_nsec;
5754 } else {
5755 // user level CPU time only
5756 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5757 (jlong)prusage.pr_utime.tv_nsec;
5758 }
5759
5760 return(lwp_time);
5761 }
5762
5763 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5764 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5765 info_ptr->may_skip_backward = false; // elapsed time not wall time
5766 info_ptr->may_skip_forward = false; // elapsed time not wall time
5767 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5768 }
5769
5770 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5771 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5772 info_ptr->may_skip_backward = false; // elapsed time not wall time
5773 info_ptr->may_skip_forward = false; // elapsed time not wall time
5774 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5775 }
5776
5777 bool os::is_thread_cpu_time_supported() {
5778 if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
5779 return true;
5780 } else {
5781 return false;
5782 }
5783 }
5784
5785 // System loadavg support. Returns -1 if load average cannot be obtained.
5786 // Return the load average for our processor set if the primitive exists
5787 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5788 int os::loadavg(double loadavg[], int nelem) {
5789 if (pset_getloadavg_ptr != NULL) {
5790 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5791 } else {
5792 return ::getloadavg(loadavg, nelem);
5793 }
5794 }
5795
5796 //---------------------------------------------------------------------------------
5797
5798 static address same_page(address x, address y) {
5799 intptr_t page_bits = -os::vm_page_size();
5800 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
5801 return x;
5802 else if (x > y)
5803 return (address)(intptr_t(y) | ~page_bits) + 1;
5804 else
5805 return (address)(intptr_t(y) & page_bits);
5806 }
5807
5808 bool os::find(address addr, outputStream* st) {
5809 Dl_info dlinfo;
5810 memset(&dlinfo, 0, sizeof(dlinfo));
5811 if (dladdr(addr, &dlinfo)) {
5812 #ifdef _LP64
5813 st->print("0x%016lx: ", addr);
5814 #else
5815 st->print("0x%08x: ", addr);
5816 #endif
5817 if (dlinfo.dli_sname != NULL)
5818 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5819 else if (dlinfo.dli_fname)
5820 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5821 else
5822 st->print("<absolute address>");
5823 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname);
5824 #ifdef _LP64
5825 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase);
5826 #else
5827 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase);
5828 #endif
5829 st->cr();
5830
5831 if (Verbose) {
5832 // decode some bytes around the PC
5833 address begin = same_page(addr-40, addr);
5834 address end = same_page(addr+40, addr);
5835 address lowest = (address) dlinfo.dli_sname;
5836 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5837 if (begin < lowest) begin = lowest;
5838 Dl_info dlinfo2;
5839 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
5840 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
5841 end = (address) dlinfo2.dli_saddr;
5842 Disassembler::decode(begin, end, st);
5843 }
5844 return true;
5845 }
5846 return false;
5847 }
5848
5849 // Following function has been added to support HotSparc's libjvm.so running
5850 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5851 // src/solaris/hpi/native_threads in the EVM codebase.
5852 //
5853 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5854 // libraries and should thus be removed. We will leave it behind for a while
5855 // until we no longer want to able to run on top of 1.3.0 Solaris production
5856 // JDK. See 4341971.
5857
5858 #define STACK_SLACK 0x800
5859
5860 extern "C" {
5861 intptr_t sysThreadAvailableStackWithSlack() {
5862 stack_t st;
5863 intptr_t retval, stack_top;
5864 retval = thr_stksegment(&st);
5865 assert(retval == 0, "incorrect return value from thr_stksegment");
5866 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5867 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5868 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5869 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5870 }
5871 }
5872
5873 // ObjectMonitor park-unpark infrastructure ...
5874 //
5875 // We implement Solaris and Linux PlatformEvents with the
5876 // obvious condvar-mutex-flag triple.
5877 // Another alternative that works quite well is pipes:
5878 // Each PlatformEvent consists of a pipe-pair.
5879 // The thread associated with the PlatformEvent
5880 // calls park(), which reads from the input end of the pipe.
5881 // Unpark() writes into the other end of the pipe.
5882 // The write-side of the pipe must be set NDELAY.
5883 // Unfortunately pipes consume a large # of handles.
5884 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5885 // Using pipes for the 1st few threads might be workable, however.
5886 //
5887 // park() is permitted to return spuriously.
5888 // Callers of park() should wrap the call to park() in
5889 // an appropriate loop. A litmus test for the correct
5890 // usage of park is the following: if park() were modified
5891 // to immediately return 0 your code should still work,
5892 // albeit degenerating to a spin loop.
5893 //
5894 // An interesting optimization for park() is to use a trylock()
5895 // to attempt to acquire the mutex. If the trylock() fails
5896 // then we know that a concurrent unpark() operation is in-progress.
5897 // in that case the park() code could simply set _count to 0
5898 // and return immediately. The subsequent park() operation *might*
5899 // return immediately. That's harmless as the caller of park() is
5900 // expected to loop. By using trylock() we will have avoided a
5901 // avoided a context switch caused by contention on the per-thread mutex.
5902 //
5903 // TODO-FIXME:
5904 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5905 // objectmonitor implementation.
5906 // 2. Collapse the JSR166 parker event, and the
5907 // objectmonitor ParkEvent into a single "Event" construct.
5908 // 3. In park() and unpark() add:
5909 // assert (Thread::current() == AssociatedWith).
5910 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5911 // 1-out-of-N park() operations will return immediately.
5912 //
5913 // _Event transitions in park()
5914 // -1 => -1 : illegal
5915 // 1 => 0 : pass - return immediately
5916 // 0 => -1 : block
5917 //
5918 // _Event serves as a restricted-range semaphore.
5919 //
5920 // Another possible encoding of _Event would be with
5921 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5922 //
5923 // TODO-FIXME: add DTRACE probes for:
5924 // 1. Tx parks
5925 // 2. Ty unparks Tx
5926 // 3. Tx resumes from park
5927
5928
5929 // value determined through experimentation
5930 #define ROUNDINGFIX 11
5931
5932 // utility to compute the abstime argument to timedwait.
5933 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5934
5935 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5936 // millis is the relative timeout time
5937 // abstime will be the absolute timeout time
5938 if (millis < 0) millis = 0;
5939 struct timeval now;
5940 int status = gettimeofday(&now, NULL);
5941 assert(status == 0, "gettimeofday");
5942 jlong seconds = millis / 1000;
5943 jlong max_wait_period;
5944
5945 if (UseLWPSynchronization) {
5946 // forward port of fix for 4275818 (not sleeping long enough)
5947 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5948 // _lwp_cond_timedwait() used a round_down algorithm rather
5949 // than a round_up. For millis less than our roundfactor
5950 // it rounded down to 0 which doesn't meet the spec.
5951 // For millis > roundfactor we may return a bit sooner, but
5952 // since we can not accurately identify the patch level and
5953 // this has already been fixed in Solaris 9 and 8 we will
5954 // leave it alone rather than always rounding down.
5955
5956 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5957 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5958 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5959 max_wait_period = 21000000;
5960 } else {
5961 max_wait_period = 50000000;
5962 }
5963 millis %= 1000;
5964 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5965 seconds = max_wait_period;
5966 }
5967 abstime->tv_sec = now.tv_sec + seconds;
5968 long usec = now.tv_usec + millis * 1000;
5969 if (usec >= 1000000) {
5970 abstime->tv_sec += 1;
5971 usec -= 1000000;
5972 }
5973 abstime->tv_nsec = usec * 1000;
5974 return abstime;
5975 }
5976
5977 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
5978 // Conceptually TryPark() should be equivalent to park(0).
5979
5980 int os::PlatformEvent::TryPark() {
5981 for (;;) {
5982 const int v = _Event ;
5983 guarantee ((v == 0) || (v == 1), "invariant") ;
5984 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
5985 }
5986 }
5987
5988 void os::PlatformEvent::park() { // AKA: down()
5989 // Invariant: Only the thread associated with the Event/PlatformEvent
5990 // may call park().
5991 int v ;
5992 for (;;) {
5993 v = _Event ;
5994 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5995 }
5996 guarantee (v >= 0, "invariant") ;
5997 if (v == 0) {
5998 // Do this the hard way by blocking ...
5999 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6000 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6001 // Only for SPARC >= V8PlusA
6002 #if defined(__sparc) && defined(COMPILER2)
6003 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6004 #endif
6005 int status = os::Solaris::mutex_lock(_mutex);
6006 assert_status(status == 0, status, "mutex_lock");
6007 guarantee (_nParked == 0, "invariant") ;
6008 ++ _nParked ;
6009 while (_Event < 0) {
6010 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
6011 // Treat this the same as if the wait was interrupted
6012 // With usr/lib/lwp going to kernel, always handle ETIME
6013 status = os::Solaris::cond_wait(_cond, _mutex);
6014 if (status == ETIME) status = EINTR ;
6015 assert_status(status == 0 || status == EINTR, status, "cond_wait");
6016 }
6017 -- _nParked ;
6018 _Event = 0 ;
6019 status = os::Solaris::mutex_unlock(_mutex);
6020 assert_status(status == 0, status, "mutex_unlock");
6021 }
6022 }
6023
6024 int os::PlatformEvent::park(jlong millis) {
6025 guarantee (_nParked == 0, "invariant") ;
6026 int v ;
6027 for (;;) {
6028 v = _Event ;
6029 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
6030 }
6031 guarantee (v >= 0, "invariant") ;
6032 if (v != 0) return OS_OK ;
6033
6034 int ret = OS_TIMEOUT;
6035 timestruc_t abst;
6036 compute_abstime (&abst, millis);
6037
6038 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6039 // For Solaris SPARC set fprs.FEF=0 prior to parking.
6040 // Only for SPARC >= V8PlusA
6041 #if defined(__sparc) && defined(COMPILER2)
6042 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6043 #endif
6044 int status = os::Solaris::mutex_lock(_mutex);
6045 assert_status(status == 0, status, "mutex_lock");
6046 guarantee (_nParked == 0, "invariant") ;
6047 ++ _nParked ;
6048 while (_Event < 0) {
6049 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
6050 assert_status(status == 0 || status == EINTR ||
6051 status == ETIME || status == ETIMEDOUT,
6052 status, "cond_timedwait");
6053 if (!FilterSpuriousWakeups) break ; // previous semantics
6054 if (status == ETIME || status == ETIMEDOUT) break ;
6055 // We consume and ignore EINTR and spurious wakeups.
6056 }
6057 -- _nParked ;
6058 if (_Event >= 0) ret = OS_OK ;
6059 _Event = 0 ;
6060 status = os::Solaris::mutex_unlock(_mutex);
6061 assert_status(status == 0, status, "mutex_unlock");
6062 return ret;
6063 }
6064
6065 void os::PlatformEvent::unpark() {
6066 int v, AnyWaiters;
6067
6068 // Increment _Event.
6069 // Another acceptable implementation would be to simply swap 1
6070 // into _Event:
6071 // if (Swap (&_Event, 1) < 0) {
6072 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ;
6073 // if (AnyWaiters) cond_signal (_cond) ;
6074 // }
6075
6076 for (;;) {
6077 v = _Event ;
6078 if (v > 0) {
6079 // The LD of _Event could have reordered or be satisfied
6080 // by a read-aside from this processor's write buffer.
6081 // To avoid problems execute a barrier and then
6082 // ratify the value. A degenerate CAS() would also work.
6083 // Viz., CAS (v+0, &_Event, v) == v).
6084 OrderAccess::fence() ;
6085 if (_Event == v) return ;
6086 continue ;
6087 }
6088 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
6089 }
6090
6091 // If the thread associated with the event was parked, wake it.
6092 if (v < 0) {
6093 int status ;
6094 // Wait for the thread assoc with the PlatformEvent to vacate.
6095 status = os::Solaris::mutex_lock(_mutex);
6096 assert_status(status == 0, status, "mutex_lock");
6097 AnyWaiters = _nParked ;
6098 status = os::Solaris::mutex_unlock(_mutex);
6099 assert_status(status == 0, status, "mutex_unlock");
6100 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ;
6101 if (AnyWaiters != 0) {
6102 // We intentional signal *after* dropping the lock
6103 // to avoid a common class of futile wakeups.
6104 status = os::Solaris::cond_signal(_cond);
6105 assert_status(status == 0, status, "cond_signal");
6106 }
6107 }
6108 }
6109
6110 // JSR166
6111 // -------------------------------------------------------
6112
6113 /*
6114 * The solaris and linux implementations of park/unpark are fairly
6115 * conservative for now, but can be improved. They currently use a
6116 * mutex/condvar pair, plus _counter.
6117 * Park decrements _counter if > 0, else does a condvar wait. Unpark
6118 * sets count to 1 and signals condvar. Only one thread ever waits
6119 * on the condvar. Contention seen when trying to park implies that someone
6120 * is unparking you, so don't wait. And spurious returns are fine, so there
6121 * is no need to track notifications.
6122 */
6123
6124 #define MAX_SECS 100000000
6125 /*
6126 * This code is common to linux and solaris and will be moved to a
6127 * common place in dolphin.
6128 *
6129 * The passed in time value is either a relative time in nanoseconds
6130 * or an absolute time in milliseconds. Either way it has to be unpacked
6131 * into suitable seconds and nanoseconds components and stored in the
6132 * given timespec structure.
6133 * Given time is a 64-bit value and the time_t used in the timespec is only
6134 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
6135 * overflow if times way in the future are given. Further on Solaris versions
6136 * prior to 10 there is a restriction (see cond_timedwait) that the specified
6137 * number of seconds, in abstime, is less than current_time + 100,000,000.
6138 * As it will be 28 years before "now + 100000000" will overflow we can
6139 * ignore overflow and just impose a hard-limit on seconds using the value
6140 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
6141 * years from "now".
6142 */
6143 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
6144 assert (time > 0, "convertTime");
6145
6146 struct timeval now;
6147 int status = gettimeofday(&now, NULL);
6148 assert(status == 0, "gettimeofday");
6149
6150 time_t max_secs = now.tv_sec + MAX_SECS;
6151
6152 if (isAbsolute) {
6153 jlong secs = time / 1000;
6154 if (secs > max_secs) {
6155 absTime->tv_sec = max_secs;
6156 }
6157 else {
6158 absTime->tv_sec = secs;
6159 }
6160 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
6161 }
6162 else {
6163 jlong secs = time / NANOSECS_PER_SEC;
6164 if (secs >= MAX_SECS) {
6165 absTime->tv_sec = max_secs;
6166 absTime->tv_nsec = 0;
6167 }
6168 else {
6169 absTime->tv_sec = now.tv_sec + secs;
6170 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
6171 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
6172 absTime->tv_nsec -= NANOSECS_PER_SEC;
6173 ++absTime->tv_sec; // note: this must be <= max_secs
6174 }
6175 }
6176 }
6177 assert(absTime->tv_sec >= 0, "tv_sec < 0");
6178 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
6179 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
6180 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
6181 }
6182
6183 void Parker::park(bool isAbsolute, jlong time) {
6184
6185 // Optional fast-path check:
6186 // Return immediately if a permit is available.
6187 if (_counter > 0) {
6188 _counter = 0 ;
6189 OrderAccess::fence();
6190 return ;
6191 }
6192
6193 // Optional fast-exit: Check interrupt before trying to wait
6194 Thread* thread = Thread::current();
6195 assert(thread->is_Java_thread(), "Must be JavaThread");
6196 JavaThread *jt = (JavaThread *)thread;
6197 if (Thread::is_interrupted(thread, false)) {
6198 return;
6199 }
6200
6201 // First, demultiplex/decode time arguments
6202 timespec absTime;
6203 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
6204 return;
6205 }
6206 if (time > 0) {
6207 // Warning: this code might be exposed to the old Solaris time
6208 // round-down bugs. Grep "roundingFix" for details.
6209 unpackTime(&absTime, isAbsolute, time);
6210 }
6211
6212 // Enter safepoint region
6213 // Beware of deadlocks such as 6317397.
6214 // The per-thread Parker:: _mutex is a classic leaf-lock.
6215 // In particular a thread must never block on the Threads_lock while
6216 // holding the Parker:: mutex. If safepoints are pending both the
6217 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
6218 ThreadBlockInVM tbivm(jt);
6219
6220 // Don't wait if cannot get lock since interference arises from
6221 // unblocking. Also. check interrupt before trying wait
6222 if (Thread::is_interrupted(thread, false) ||
6223 os::Solaris::mutex_trylock(_mutex) != 0) {
6224 return;
6225 }
6226
6227 int status ;
6228
6229 if (_counter > 0) { // no wait needed
6230 _counter = 0;
6231 status = os::Solaris::mutex_unlock(_mutex);
6232 assert (status == 0, "invariant") ;
6233 OrderAccess::fence();
6234 return;
6235 }
6236
6237 #ifdef ASSERT
6238 // Don't catch signals while blocked; let the running threads have the signals.
6239 // (This allows a debugger to break into the running thread.)
6240 sigset_t oldsigs;
6241 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
6242 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
6243 #endif
6244
6245 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
6246 jt->set_suspend_equivalent();
6247 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
6248
6249 // Do this the hard way by blocking ...
6250 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6251 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6252 // Only for SPARC >= V8PlusA
6253 #if defined(__sparc) && defined(COMPILER2)
6254 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6255 #endif
6256
6257 if (time == 0) {
6258 status = os::Solaris::cond_wait (_cond, _mutex) ;
6259 } else {
6260 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
6261 }
6262 // Note that an untimed cond_wait() can sometimes return ETIME on older
6263 // versions of the Solaris.
6264 assert_status(status == 0 || status == EINTR ||
6265 status == ETIME || status == ETIMEDOUT,
6266 status, "cond_timedwait");
6267
6268 #ifdef ASSERT
6269 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
6270 #endif
6271 _counter = 0 ;
6272 status = os::Solaris::mutex_unlock(_mutex);
6273 assert_status(status == 0, status, "mutex_unlock") ;
6274
6275 // If externally suspended while waiting, re-suspend
6276 if (jt->handle_special_suspend_equivalent_condition()) {
6277 jt->java_suspend_self();
6278 }
6279 OrderAccess::fence();
6280 }
6281
6282 void Parker::unpark() {
6283 int s, status ;
6284 status = os::Solaris::mutex_lock (_mutex) ;
6285 assert (status == 0, "invariant") ;
6286 s = _counter;
6287 _counter = 1;
6288 status = os::Solaris::mutex_unlock (_mutex) ;
6289 assert (status == 0, "invariant") ;
6290
6291 if (s < 1) {
6292 status = os::Solaris::cond_signal (_cond) ;
6293 assert (status == 0, "invariant") ;
6294 }
6295 }
6296
6297 extern char** environ;
6298
6299 // Run the specified command in a separate process. Return its exit value,
6300 // or -1 on failure (e.g. can't fork a new process).
6301 // Unlike system(), this function can be called from signal handler. It
6302 // doesn't block SIGINT et al.
6303 int os::fork_and_exec(char* cmd) {
6304 char * argv[4];
6305 argv[0] = (char *)"sh";
6306 argv[1] = (char *)"-c";
6307 argv[2] = cmd;
6308 argv[3] = NULL;
6309
6310 // fork is async-safe, fork1 is not so can't use in signal handler
6311 pid_t pid;
6312 Thread* t = ThreadLocalStorage::get_thread_slow();
6313 if (t != NULL && t->is_inside_signal_handler()) {
6314 pid = fork();
6315 } else {
6316 pid = fork1();
6317 }
6318
6319 if (pid < 0) {
6320 // fork failed
6321 warning("fork failed: %s", strerror(errno));
6322 return -1;
6323
6324 } else if (pid == 0) {
6325 // child process
6326
6327 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
6328 execve("/usr/bin/sh", argv, environ);
6329
6330 // execve failed
6331 _exit(-1);
6332
6333 } else {
6334 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
6335 // care about the actual exit code, for now.
6336
6337 int status;
6338
6339 // Wait for the child process to exit. This returns immediately if
6340 // the child has already exited. */
6341 while (waitpid(pid, &status, 0) < 0) {
6342 switch (errno) {
6343 case ECHILD: return 0;
6344 case EINTR: break;
6345 default: return -1;
6346 }
6347 }
6348
6349 if (WIFEXITED(status)) {
6350 // The child exited normally; get its exit code.
6351 return WEXITSTATUS(status);
6352 } else if (WIFSIGNALED(status)) {
6353 // The child exited because of a signal
6354 // The best value to return is 0x80 + signal number,
6355 // because that is what all Unix shells do, and because
6356 // it allows callers to distinguish between process exit and
6357 // process death by signal.
6358 return 0x80 + WTERMSIG(status);
6359 } else {
6360 // Unknown exit code; pass it through
6361 return status;
6362 }
6363 }
6364 }
6365
6366 // is_headless_jre()
6367 //
6368 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
6369 // in order to report if we are running in a headless jre
6370 //
6371 // Since JDK8 xawt/libmawt.so was moved into the same directory
6372 // as libawt.so, and renamed libawt_xawt.so
6373 //
6374 bool os::is_headless_jre() {
6375 struct stat statbuf;
6376 char buf[MAXPATHLEN];
6377 char libmawtpath[MAXPATHLEN];
6378 const char *xawtstr = "/xawt/libmawt.so";
6379 const char *new_xawtstr = "/libawt_xawt.so";
6380 char *p;
6381
6382 // Get path to libjvm.so
6383 os::jvm_path(buf, sizeof(buf));
6384
6385 // Get rid of libjvm.so
6386 p = strrchr(buf, '/');
6387 if (p == NULL) return false;
6388 else *p = '\0';
6389
6390 // Get rid of client or server
6391 p = strrchr(buf, '/');
6392 if (p == NULL) return false;
6393 else *p = '\0';
6394
6395 // check xawt/libmawt.so
6396 strcpy(libmawtpath, buf);
6397 strcat(libmawtpath, xawtstr);
6398 if (::stat(libmawtpath, &statbuf) == 0) return false;
6399
6400 // check libawt_xawt.so
6401 strcpy(libmawtpath, buf);
6402 strcat(libmawtpath, new_xawtstr);
6403 if (::stat(libmawtpath, &statbuf) == 0) return false;
6404
6405 return true;
6406 }
6407
6408 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
6409 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted);
6410 }
6411
6412 int os::close(int fd) {
6413 RESTARTABLE_RETURN_INT(::close(fd));
6414 }
6415
6416 int os::socket_close(int fd) {
6417 RESTARTABLE_RETURN_INT(::close(fd));
6418 }
6419
6420 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
6421 INTERRUPTIBLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6422 }
6423
6424 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
6425 INTERRUPTIBLE_RETURN_INT((int)::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6426 }
6427
6428 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
6429 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
6430 }
6431
6432 // As both poll and select can be interrupted by signals, we have to be
6433 // prepared to restart the system call after updating the timeout, unless
6434 // a poll() is done with timeout == -1, in which case we repeat with this
6435 // "wait forever" value.
6436
6437 int os::timeout(int fd, long timeout) {
6438 int res;
6439 struct timeval t;
6440 julong prevtime, newtime;
6441 static const char* aNull = 0;
6442 struct pollfd pfd;
6443 pfd.fd = fd;
6444 pfd.events = POLLIN;
6445
6446 gettimeofday(&t, &aNull);
6447 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
6448
6449 for(;;) {
6450 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted);
6451 if(res == OS_ERR && errno == EINTR) {
6452 if(timeout != -1) {
6453 gettimeofday(&t, &aNull);
6454 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000;
6455 timeout -= newtime - prevtime;
6456 if(timeout <= 0)
6457 return OS_OK;
6458 prevtime = newtime;
6459 }
6460 } else return res;
6461 }
6462 }
6463
6464 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
6465 int _result;
6466 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,\
6467 os::Solaris::clear_interrupted);
6468
6469 // Depending on when thread interruption is reset, _result could be
6470 // one of two values when errno == EINTR
6471
6472 if (((_result == OS_INTRPT) || (_result == OS_ERR))
6473 && (errno == EINTR)) {
6474 /* restarting a connect() changes its errno semantics */
6475 INTERRUPTIBLE(::connect(fd, him, len), _result,\
6476 os::Solaris::clear_interrupted);
6477 /* undo these changes */
6478 if (_result == OS_ERR) {
6479 if (errno == EALREADY) {
6480 errno = EINPROGRESS; /* fall through */
6481 } else if (errno == EISCONN) {
6482 errno = 0;
6483 return OS_OK;
6484 }
6485 }
6486 }
6487 return _result;
6488 }
6489
6490 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
6491 if (fd < 0) {
6492 return OS_ERR;
6493 }
6494 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, len),\
6495 os::Solaris::clear_interrupted);
6496 }
6497
6498 int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
6499 sockaddr* from, socklen_t* fromlen) {
6500 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen),\
6501 os::Solaris::clear_interrupted);
6502 }
6503
6504 int os::sendto(int fd, char* buf, size_t len, uint flags,
6505 struct sockaddr* to, socklen_t tolen) {
6506 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen),\
6507 os::Solaris::clear_interrupted);
6508 }
6509
6510 int os::socket_available(int fd, jint *pbytes) {
6511 if (fd < 0) {
6512 return OS_OK;
6513 }
6514 int ret;
6515 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
6516 // note: ioctl can return 0 when successful, JVM_SocketAvailable
6517 // is expected to return 0 on failure and 1 on success to the jdk.
6518 return (ret == OS_ERR) ? 0 : 1;
6519 }
6520
6521 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
6522 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\
6523 os::Solaris::clear_interrupted);
6524 }
6525
6526 // Get the default path to the core file
6527 // Returns the length of the string
6528 int os::get_core_path(char* buffer, size_t bufferSize) {
6529 const char* p = get_current_directory(buffer, bufferSize);
6530
6531 if (p == NULL) {
6532 assert(p != NULL, "failed to get current directory");
6533 return 0;
6534 }
6535
6536 return strlen(buffer);
6537 }