1 /*
2 * Copyright (c) 1997, 2014, 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
119 // Here are some liblgrp types from sys/lgrp_user.h to be able to
120 // compile on older systems without this header file.
121
122 #ifndef MADV_ACCESS_LWP
123 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
124 #endif
125 #ifndef MADV_ACCESS_MANY
126 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */
127 #endif
128
129 #ifndef LGRP_RSRC_CPU
130 # define LGRP_RSRC_CPU 0 /* CPU resources */
131 #endif
132 #ifndef LGRP_RSRC_MEM
133 # define LGRP_RSRC_MEM 1 /* memory resources */
134 #endif
135
136 // see thr_setprio(3T) for the basis of these numbers
137 #define MinimumPriority 0
138 #define NormalPriority 64
139 #define MaximumPriority 127
140
141 // Values for ThreadPriorityPolicy == 1
142 int prio_policy1[CriticalPriority+1] = {
143 -99999, 0, 16, 32, 48, 64,
144 80, 96, 112, 124, 127, 127 };
145
146 // System parameters used internally
147 static clock_t clock_tics_per_sec = 100;
148
149 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
150 static bool enabled_extended_FILE_stdio = false;
151
152 // For diagnostics to print a message once. see run_periodic_checks
153 static bool check_addr0_done = false;
154 static sigset_t check_signal_done;
155 static bool check_signals = true;
156
157 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
158 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
159
160 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
161
162
163 // "default" initializers for missing libc APIs
164 extern "C" {
165 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
166 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
167
168 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
169 static int lwp_cond_destroy(cond_t *cv) { return 0; }
170 }
171
172 // "default" initializers for pthread-based synchronization
173 extern "C" {
174 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
175 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
176 }
177
178 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time);
179
180 // Thread Local Storage
181 // This is common to all Solaris platforms so it is defined here,
182 // in this common file.
183 // The declarations are in the os_cpu threadLS*.hpp files.
184 //
185 // Static member initialization for TLS
186 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
187
188 #ifndef PRODUCT
189 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
190
191 int ThreadLocalStorage::_tcacheHit = 0;
192 int ThreadLocalStorage::_tcacheMiss = 0;
193
194 void ThreadLocalStorage::print_statistics() {
195 int total = _tcacheMiss+_tcacheHit;
196 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
197 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
198 }
199 #undef _PCT
200 #endif // PRODUCT
201
202 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
203 int index) {
204 Thread *thread = get_thread_slow();
205 if (thread != NULL) {
206 address sp = os::current_stack_pointer();
207 guarantee(thread->_stack_base == NULL ||
208 (sp <= thread->_stack_base &&
209 sp >= thread->_stack_base - thread->_stack_size) ||
210 is_error_reported(),
211 "sp must be inside of selected thread stack");
212
213 thread->set_self_raw_id(raw_id); // mark for quick retrieval
214 _get_thread_cache[ index ] = thread;
215 }
216 return thread;
217 }
218
219
220 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0};
221 #define NO_CACHED_THREAD ((Thread*)all_zero)
222
223 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
224
225 // Store the new value before updating the cache to prevent a race
226 // between get_thread_via_cache_slowly() and this store operation.
227 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
228
229 // Update thread cache with new thread if setting on thread create,
230 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
231 uintptr_t raw = pd_raw_thread_id();
232 int ix = pd_cache_index(raw);
233 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
234 }
235
236 void ThreadLocalStorage::pd_init() {
237 for (int i = 0; i < _pd_cache_size; i++) {
238 _get_thread_cache[i] = NO_CACHED_THREAD;
239 }
240 }
241
242 // Invalidate all the caches (happens to be the same as pd_init).
243 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
244
245 #undef NO_CACHED_THREAD
246
247 // END Thread Local Storage
248
249 static inline size_t adjust_stack_size(address base, size_t size) {
250 if ((ssize_t)size < 0) {
251 // 4759953: Compensate for ridiculous stack size.
252 size = max_intx;
253 }
254 if (size > (size_t)base) {
255 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
256 size = (size_t)base;
257 }
258 return size;
259 }
260
261 static inline stack_t get_stack_info() {
262 stack_t st;
263 int retval = thr_stksegment(&st);
264 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
265 assert(retval == 0, "incorrect return value from thr_stksegment");
266 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
267 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
268 return st;
269 }
270
271 address os::current_stack_base() {
272 int r = thr_main() ;
273 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
274 bool is_primordial_thread = r;
275
276 // Workaround 4352906, avoid calls to thr_stksegment by
277 // thr_main after the first one (it looks like we trash
278 // some data, causing the value for ss_sp to be incorrect).
279 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
280 stack_t st = get_stack_info();
281 if (is_primordial_thread) {
282 // cache initial value of stack base
283 os::Solaris::_main_stack_base = (address)st.ss_sp;
284 }
285 return (address)st.ss_sp;
286 } else {
287 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
288 return os::Solaris::_main_stack_base;
289 }
290 }
291
292 size_t os::current_stack_size() {
293 size_t size;
294
295 int r = thr_main() ;
296 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
297 if(!r) {
298 size = get_stack_info().ss_size;
299 } else {
300 struct rlimit limits;
301 getrlimit(RLIMIT_STACK, &limits);
302 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
303 }
304 // base may not be page aligned
305 address base = current_stack_base();
306 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
307 return (size_t)(base - bottom);
308 }
309
310 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
311 return localtime_r(clock, res);
312 }
313
314 void os::Solaris::try_enable_extended_io() {
315 typedef int (*enable_extended_FILE_stdio_t)(int, int);
316
317 if (!UseExtendedFileIO) {
318 return;
319 }
320
321 enable_extended_FILE_stdio_t enabler =
322 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
323 "enable_extended_FILE_stdio");
324 if (enabler) {
325 enabler(-1, -1);
326 }
327 }
328
329 static int _processors_online = 0;
330
331 jint os::Solaris::_os_thread_limit = 0;
332 volatile jint os::Solaris::_os_thread_count = 0;
333
334 julong os::available_memory() {
335 return Solaris::available_memory();
336 }
337
338 julong os::Solaris::available_memory() {
339 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
340 }
341
342 julong os::Solaris::_physical_memory = 0;
343
344 julong os::physical_memory() {
345 return Solaris::physical_memory();
346 }
347
348 static hrtime_t first_hrtime = 0;
349 static const hrtime_t hrtime_hz = 1000*1000*1000;
350 const int LOCK_BUSY = 1;
351 const int LOCK_FREE = 0;
352 const int LOCK_INVALID = -1;
353 static volatile hrtime_t max_hrtime = 0;
354 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress
355
356
357 void os::Solaris::initialize_system_info() {
358 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
359 _processors_online = sysconf (_SC_NPROCESSORS_ONLN);
360 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
361 }
362
363 int os::active_processor_count() {
364 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
365 pid_t pid = getpid();
366 psetid_t pset = PS_NONE;
367 // Are we running in a processor set or is there any processor set around?
368 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
369 uint_t pset_cpus;
370 // Query the number of cpus available to us.
371 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
372 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
373 _processors_online = pset_cpus;
374 return pset_cpus;
375 }
376 }
377 // Otherwise return number of online cpus
378 return online_cpus;
379 }
380
381 static bool find_processors_in_pset(psetid_t pset,
382 processorid_t** id_array,
383 uint_t* id_length) {
384 bool result = false;
385 // Find the number of processors in the processor set.
386 if (pset_info(pset, NULL, id_length, NULL) == 0) {
387 // Make up an array to hold their ids.
388 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
389 // Fill in the array with their processor ids.
390 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
391 result = true;
392 }
393 }
394 return result;
395 }
396
397 // Callers of find_processors_online() must tolerate imprecise results --
398 // the system configuration can change asynchronously because of DR
399 // or explicit psradm operations.
400 //
401 // We also need to take care that the loop (below) terminates as the
402 // number of processors online can change between the _SC_NPROCESSORS_ONLN
403 // request and the loop that builds the list of processor ids. Unfortunately
404 // there's no reliable way to determine the maximum valid processor id,
405 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
406 // man pages, which claim the processor id set is "sparse, but
407 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
408 // exit the loop.
409 //
410 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
411 // not available on S8.0.
412
413 static bool find_processors_online(processorid_t** id_array,
414 uint* id_length) {
415 const processorid_t MAX_PROCESSOR_ID = 100000 ;
416 // Find the number of processors online.
417 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
418 // Make up an array to hold their ids.
419 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
420 // Processors need not be numbered consecutively.
421 long found = 0;
422 processorid_t next = 0;
423 while (found < *id_length && next < MAX_PROCESSOR_ID) {
424 processor_info_t info;
425 if (processor_info(next, &info) == 0) {
426 // NB, PI_NOINTR processors are effectively online ...
427 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
428 (*id_array)[found] = next;
429 found += 1;
430 }
431 }
432 next += 1;
433 }
434 if (found < *id_length) {
435 // The loop above didn't identify the expected number of processors.
436 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
437 // and re-running the loop, above, but there's no guarantee of progress
438 // if the system configuration is in flux. Instead, we just return what
439 // we've got. Note that in the worst case find_processors_online() could
440 // return an empty set. (As a fall-back in the case of the empty set we
441 // could just return the ID of the current processor).
442 *id_length = found ;
443 }
444
445 return true;
446 }
447
448 static bool assign_distribution(processorid_t* id_array,
449 uint id_length,
450 uint* distribution,
451 uint distribution_length) {
452 // We assume we can assign processorid_t's to uint's.
453 assert(sizeof(processorid_t) == sizeof(uint),
454 "can't convert processorid_t to uint");
455 // Quick check to see if we won't succeed.
456 if (id_length < distribution_length) {
457 return false;
458 }
459 // Assign processor ids to the distribution.
460 // Try to shuffle processors to distribute work across boards,
461 // assuming 4 processors per board.
462 const uint processors_per_board = ProcessDistributionStride;
463 // Find the maximum processor id.
464 processorid_t max_id = 0;
465 for (uint m = 0; m < id_length; m += 1) {
466 max_id = MAX2(max_id, id_array[m]);
467 }
468 // The next id, to limit loops.
469 const processorid_t limit_id = max_id + 1;
470 // Make up markers for available processors.
471 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
472 for (uint c = 0; c < limit_id; c += 1) {
473 available_id[c] = false;
474 }
475 for (uint a = 0; a < id_length; a += 1) {
476 available_id[id_array[a]] = true;
477 }
478 // Step by "boards", then by "slot", copying to "assigned".
479 // NEEDS_CLEANUP: The assignment of processors should be stateful,
480 // remembering which processors have been assigned by
481 // previous calls, etc., so as to distribute several
482 // independent calls of this method. What we'd like is
483 // It would be nice to have an API that let us ask
484 // how many processes are bound to a processor,
485 // but we don't have that, either.
486 // In the short term, "board" is static so that
487 // subsequent distributions don't all start at board 0.
488 static uint board = 0;
489 uint assigned = 0;
490 // Until we've found enough processors ....
491 while (assigned < distribution_length) {
492 // ... find the next available processor in the board.
493 for (uint slot = 0; slot < processors_per_board; slot += 1) {
494 uint try_id = board * processors_per_board + slot;
495 if ((try_id < limit_id) && (available_id[try_id] == true)) {
496 distribution[assigned] = try_id;
497 available_id[try_id] = false;
498 assigned += 1;
499 break;
500 }
501 }
502 board += 1;
503 if (board * processors_per_board + 0 >= limit_id) {
504 board = 0;
505 }
506 }
507 if (available_id != NULL) {
508 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal);
509 }
510 return true;
511 }
512
513 void os::set_native_thread_name(const char *name) {
514 // Not yet implemented.
515 return;
516 }
517
518 bool os::distribute_processes(uint length, uint* distribution) {
519 bool result = false;
520 // Find the processor id's of all the available CPUs.
521 processorid_t* id_array = NULL;
522 uint id_length = 0;
523 // There are some races between querying information and using it,
524 // since processor sets can change dynamically.
525 psetid_t pset = PS_NONE;
526 // Are we running in a processor set?
527 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
528 result = find_processors_in_pset(pset, &id_array, &id_length);
529 } else {
530 result = find_processors_online(&id_array, &id_length);
531 }
532 if (result == true) {
533 if (id_length >= length) {
534 result = assign_distribution(id_array, id_length, distribution, length);
535 } else {
536 result = false;
537 }
538 }
539 if (id_array != NULL) {
540 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal);
541 }
542 return result;
543 }
544
545 bool os::bind_to_processor(uint processor_id) {
546 // We assume that a processorid_t can be stored in a uint.
547 assert(sizeof(uint) == sizeof(processorid_t),
548 "can't convert uint to processorid_t");
549 int bind_result =
550 processor_bind(P_LWPID, // bind LWP.
551 P_MYID, // bind current LWP.
552 (processorid_t) processor_id, // id.
553 NULL); // don't return old binding.
554 return (bind_result == 0);
555 }
556
557 bool os::getenv(const char* name, char* buffer, int len) {
558 char* val = ::getenv( name );
559 if ( val == NULL
560 || strlen(val) + 1 > len ) {
561 if (len > 0) buffer[0] = 0; // return a null string
562 return false;
563 }
564 strcpy( buffer, val );
565 return true;
566 }
567
568
569 // Return true if user is running as root.
570
571 bool os::have_special_privileges() {
572 static bool init = false;
573 static bool privileges = false;
574 if (!init) {
575 privileges = (getuid() != geteuid()) || (getgid() != getegid());
576 init = true;
577 }
578 return privileges;
579 }
580
581
582 void os::init_system_properties_values() {
583 // The next steps are taken in the product version:
584 //
585 // Obtain the JAVA_HOME value from the location of libjvm.so.
586 // This library should be located at:
587 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so.
588 //
589 // If "/jre/lib/" appears at the right place in the path, then we
590 // assume libjvm.so is installed in a JDK and we use this path.
591 //
592 // Otherwise exit with message: "Could not create the Java virtual machine."
593 //
594 // The following extra steps are taken in the debugging version:
595 //
596 // If "/jre/lib/" does NOT appear at the right place in the path
597 // instead of exit check for $JAVA_HOME environment variable.
598 //
599 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
600 // then we append a fake suffix "hotspot/libjvm.so" to this path so
601 // it looks like libjvm.so is installed there
602 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so.
603 //
604 // Otherwise exit.
605 //
606 // Important note: if the location of libjvm.so changes this
607 // code needs to be changed accordingly.
608
609 // Base path of extensions installed on the system.
610 #define SYS_EXT_DIR "/usr/jdk/packages"
611 #define EXTENSIONS_DIR "/lib/ext"
612 #define ENDORSED_DIR "/lib/endorsed"
613
614 char cpu_arch[12];
615 // Buffer that fits several sprintfs.
616 // Note that the space for the colon and the trailing null are provided
617 // by the nulls included by the sizeof operator.
618 const size_t bufsize =
619 MAX4((size_t)MAXPATHLEN, // For dll_dir & friends.
620 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path
621 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir
622 (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir
623 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal);
624
625 // sysclasspath, java_home, dll_dir
626 {
627 char *pslash;
628 os::jvm_path(buf, bufsize);
629
630 // Found the full path to libjvm.so.
631 // Now cut the path to <java_home>/jre if we can.
632 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so.
633 pslash = strrchr(buf, '/');
634 if (pslash != NULL) {
635 *pslash = '\0'; // Get rid of /{client|server|hotspot}.
636 }
637 Arguments::set_dll_dir(buf);
638
639 if (pslash != NULL) {
640 pslash = strrchr(buf, '/');
641 if (pslash != NULL) {
642 *pslash = '\0'; // Get rid of /<arch>.
643 pslash = strrchr(buf, '/');
644 if (pslash != NULL) {
645 *pslash = '\0'; // Get rid of /lib.
646 }
647 }
648 }
649 Arguments::set_java_home(buf);
650 set_boot_path('/', ':');
651 }
652
653 // Where to look for native libraries.
654 {
655 // Use dlinfo() to determine the correct java.library.path.
656 //
657 // If we're launched by the Java launcher, and the user
658 // does not set java.library.path explicitly on the commandline,
659 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
660 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
661 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
662 // /usr/lib), which is exactly what we want.
663 //
664 // If the user does set java.library.path, it completely
665 // overwrites this setting, and always has.
666 //
667 // If we're not launched by the Java launcher, we may
668 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
669 // settings. Again, dlinfo does exactly what we want.
670
671 Dl_serinfo info_sz, *info = &info_sz;
672 Dl_serpath *path;
673 char *library_path;
674 char *common_path = buf;
675
676 // Determine search path count and required buffer size.
677 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
678 FREE_C_HEAP_ARRAY(char, buf, mtInternal);
679 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
680 }
681
682 // Allocate new buffer and initialize.
683 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal);
684 info->dls_size = info_sz.dls_size;
685 info->dls_cnt = info_sz.dls_cnt;
686
687 // Obtain search path information.
688 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
689 FREE_C_HEAP_ARRAY(char, buf, mtInternal);
690 FREE_C_HEAP_ARRAY(char, info, mtInternal);
691 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
692 }
693
694 path = &info->dls_serpath[0];
695
696 // Note: Due to a legacy implementation, most of the library path
697 // is set in the launcher. This was to accomodate linking restrictions
698 // on legacy Solaris implementations (which are no longer supported).
699 // Eventually, all the library path setting will be done here.
700 //
701 // However, to prevent the proliferation of improperly built native
702 // libraries, the new path component /usr/jdk/packages is added here.
703
704 // Determine the actual CPU architecture.
705 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
706 #ifdef _LP64
707 // If we are a 64-bit vm, perform the following translations:
708 // sparc -> sparcv9
709 // i386 -> amd64
710 if (strcmp(cpu_arch, "sparc") == 0) {
711 strcat(cpu_arch, "v9");
712 } else if (strcmp(cpu_arch, "i386") == 0) {
713 strcpy(cpu_arch, "amd64");
714 }
715 #endif
716
717 // Construct the invariant part of ld_library_path.
718 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch);
719
720 // Struct size is more than sufficient for the path components obtained
721 // through the dlinfo() call, so only add additional space for the path
722 // components explicitly added here.
723 size_t library_path_size = info->dls_size + strlen(common_path);
724 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal);
725 library_path[0] = '\0';
726
727 // Construct the desired Java library path from the linker's library
728 // search path.
729 //
730 // For compatibility, it is optimal that we insert the additional path
731 // components specific to the Java VM after those components specified
732 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
733 // infrastructure.
734 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it.
735 strcpy(library_path, common_path);
736 } else {
737 int inserted = 0;
738 int i;
739 for (i = 0; i < info->dls_cnt; i++, path++) {
740 uint_t flags = path->dls_flags & LA_SER_MASK;
741 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
742 strcat(library_path, common_path);
743 strcat(library_path, os::path_separator());
744 inserted = 1;
745 }
746 strcat(library_path, path->dls_name);
747 strcat(library_path, os::path_separator());
748 }
749 // Eliminate trailing path separator.
750 library_path[strlen(library_path)-1] = '\0';
751 }
752
753 // happens before argument parsing - can't use a trace flag
754 // tty->print_raw("init_system_properties_values: native lib path: ");
755 // tty->print_raw_cr(library_path);
756
757 // Callee copies into its own buffer.
758 Arguments::set_library_path(library_path);
759
760 FREE_C_HEAP_ARRAY(char, library_path, mtInternal);
761 FREE_C_HEAP_ARRAY(char, info, mtInternal);
762 }
763
764 // Extensions directories.
765 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home());
766 Arguments::set_ext_dirs(buf);
767
768 // Endorsed standards default directory.
769 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
770 Arguments::set_endorsed_dirs(buf);
771
772 FREE_C_HEAP_ARRAY(char, buf, mtInternal);
773
774 #undef SYS_EXT_DIR
775 #undef EXTENSIONS_DIR
776 #undef ENDORSED_DIR
777 }
778
779 void os::breakpoint() {
780 BREAKPOINT;
781 }
782
783 bool os::obsolete_option(const JavaVMOption *option)
784 {
785 if (!strncmp(option->optionString, "-Xt", 3)) {
786 return true;
787 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
788 return true;
789 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
790 return true;
791 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
792 return true;
793 }
794 return false;
795 }
796
797 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
798 address stackStart = (address)thread->stack_base();
799 address stackEnd = (address)(stackStart - (address)thread->stack_size());
800 if (sp < stackStart && sp >= stackEnd ) return true;
801 return false;
802 }
803
804 extern "C" void breakpoint() {
805 // use debugger to set breakpoint here
806 }
807
808 static thread_t main_thread;
809
810 // Thread start routine for all new Java threads
811 extern "C" void* java_start(void* thread_addr) {
812 // Try to randomize the cache line index of hot stack frames.
813 // This helps when threads of the same stack traces evict each other's
814 // cache lines. The threads can be either from the same JVM instance, or
815 // from different JVM instances. The benefit is especially true for
816 // processors with hyperthreading technology.
817 static int counter = 0;
818 int pid = os::current_process_id();
819 alloca(((pid ^ counter++) & 7) * 128);
820
821 int prio;
822 Thread* thread = (Thread*)thread_addr;
823 OSThread* osthr = thread->osthread();
824
825 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound
826 thread->_schedctl = (void *) schedctl_init () ;
827
828 if (UseNUMA) {
829 int lgrp_id = os::numa_get_group_id();
830 if (lgrp_id != -1) {
831 thread->set_lgrp_id(lgrp_id);
832 }
833 }
834
835 // If the creator called set priority before we started,
836 // we need to call set_native_priority now that we have an lwp.
837 // We used to get the priority from thr_getprio (we called
838 // thr_setprio way back in create_thread) and pass it to
839 // set_native_priority, but Solaris scales the priority
840 // in java_to_os_priority, so when we read it back here,
841 // we pass trash to set_native_priority instead of what's
842 // in java_to_os_priority. So we save the native priority
843 // in the osThread and recall it here.
844
845 if ( osthr->thread_id() != -1 ) {
846 if ( UseThreadPriorities ) {
847 int prio = osthr->native_priority();
848 if (ThreadPriorityVerbose) {
849 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
850 INTPTR_FORMAT ", setting priority: %d\n",
851 osthr->thread_id(), osthr->lwp_id(), prio);
852 }
853 os::set_native_priority(thread, prio);
854 }
855 } else if (ThreadPriorityVerbose) {
856 warning("Can't set priority in _start routine, thread id hasn't been set\n");
857 }
858
859 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
860
861 // initialize signal mask for this thread
862 os::Solaris::hotspot_sigmask(thread);
863
864 thread->run();
865
866 // One less thread is executing
867 // When the VMThread gets here, the main thread may have already exited
868 // which frees the CodeHeap containing the Atomic::dec code
869 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
870 Atomic::dec(&os::Solaris::_os_thread_count);
871 }
872
873 if (UseDetachedThreads) {
874 thr_exit(NULL);
875 ShouldNotReachHere();
876 }
877 return NULL;
878 }
879
880 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
881 // Allocate the OSThread object
882 OSThread* osthread = new OSThread(NULL, NULL);
883 if (osthread == NULL) return NULL;
884
885 // Store info on the Solaris thread into the OSThread
886 osthread->set_thread_id(thread_id);
887 osthread->set_lwp_id(_lwp_self());
888 thread->_schedctl = (void *) schedctl_init () ;
889
890 if (UseNUMA) {
891 int lgrp_id = os::numa_get_group_id();
892 if (lgrp_id != -1) {
893 thread->set_lgrp_id(lgrp_id);
894 }
895 }
896
897 if ( ThreadPriorityVerbose ) {
898 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
899 osthread->thread_id(), osthread->lwp_id() );
900 }
901
902 // Initial thread state is INITIALIZED, not SUSPENDED
903 osthread->set_state(INITIALIZED);
904
905 return osthread;
906 }
907
908 void os::Solaris::hotspot_sigmask(Thread* thread) {
909
910 //Save caller's signal mask
911 sigset_t sigmask;
912 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
913 OSThread *osthread = thread->osthread();
914 osthread->set_caller_sigmask(sigmask);
915
916 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
917 if (!ReduceSignalUsage) {
918 if (thread->is_VM_thread()) {
919 // Only the VM thread handles BREAK_SIGNAL ...
920 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
921 } else {
922 // ... all other threads block BREAK_SIGNAL
923 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
924 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
925 }
926 }
927 }
928
929 bool os::create_attached_thread(JavaThread* thread) {
930 #ifdef ASSERT
931 thread->verify_not_published();
932 #endif
933 OSThread* osthread = create_os_thread(thread, thr_self());
934 if (osthread == NULL) {
935 return false;
936 }
937
938 // Initial thread state is RUNNABLE
939 osthread->set_state(RUNNABLE);
940 thread->set_osthread(osthread);
941
942 // initialize signal mask for this thread
943 // and save the caller's signal mask
944 os::Solaris::hotspot_sigmask(thread);
945
946 return true;
947 }
948
949 bool os::create_main_thread(JavaThread* thread) {
950 #ifdef ASSERT
951 thread->verify_not_published();
952 #endif
953 if (_starting_thread == NULL) {
954 _starting_thread = create_os_thread(thread, main_thread);
955 if (_starting_thread == NULL) {
956 return false;
957 }
958 }
959
960 // The primodial thread is runnable from the start
961 _starting_thread->set_state(RUNNABLE);
962
963 thread->set_osthread(_starting_thread);
964
965 // initialize signal mask for this thread
966 // and save the caller's signal mask
967 os::Solaris::hotspot_sigmask(thread);
968
969 return true;
970 }
971
972
973 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
974 // Allocate the OSThread object
975 OSThread* osthread = new OSThread(NULL, NULL);
976 if (osthread == NULL) {
977 return false;
978 }
979
980 if ( ThreadPriorityVerbose ) {
981 char *thrtyp;
982 switch ( thr_type ) {
983 case vm_thread:
984 thrtyp = (char *)"vm";
985 break;
986 case cgc_thread:
987 thrtyp = (char *)"cgc";
988 break;
989 case pgc_thread:
990 thrtyp = (char *)"pgc";
991 break;
992 case java_thread:
993 thrtyp = (char *)"java";
994 break;
995 case compiler_thread:
996 thrtyp = (char *)"compiler";
997 break;
998 case watcher_thread:
999 thrtyp = (char *)"watcher";
1000 break;
1001 default:
1002 thrtyp = (char *)"unknown";
1003 break;
1004 }
1005 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
1006 }
1007
1008 // Calculate stack size if it's not specified by caller.
1009 if (stack_size == 0) {
1010 // The default stack size 1M (2M for LP64).
1011 stack_size = (BytesPerWord >> 2) * K * K;
1012
1013 switch (thr_type) {
1014 case os::java_thread:
1015 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
1016 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
1017 break;
1018 case os::compiler_thread:
1019 if (CompilerThreadStackSize > 0) {
1020 stack_size = (size_t)(CompilerThreadStackSize * K);
1021 break;
1022 } // else fall through:
1023 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1024 case os::vm_thread:
1025 case os::pgc_thread:
1026 case os::cgc_thread:
1027 case os::watcher_thread:
1028 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1029 break;
1030 }
1031 }
1032 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1033
1034 // Initial state is ALLOCATED but not INITIALIZED
1035 osthread->set_state(ALLOCATED);
1036
1037 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1038 // We got lots of threads. Check if we still have some address space left.
1039 // Need to be at least 5Mb of unreserved address space. We do check by
1040 // trying to reserve some.
1041 const size_t VirtualMemoryBangSize = 20*K*K;
1042 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1043 if (mem == NULL) {
1044 delete osthread;
1045 return false;
1046 } else {
1047 // Release the memory again
1048 os::release_memory(mem, VirtualMemoryBangSize);
1049 }
1050 }
1051
1052 // Setup osthread because the child thread may need it.
1053 thread->set_osthread(osthread);
1054
1055 // Create the Solaris thread
1056 thread_t tid = 0;
1057 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED;
1058 int status;
1059
1060 // Mark that we don't have an lwp or thread id yet.
1061 // In case we attempt to set the priority before the thread starts.
1062 osthread->set_lwp_id(-1);
1063 osthread->set_thread_id(-1);
1064
1065 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1066 if (status != 0) {
1067 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1068 perror("os::create_thread");
1069 }
1070 thread->set_osthread(NULL);
1071 // Need to clean up stuff we've allocated so far
1072 delete osthread;
1073 return false;
1074 }
1075
1076 Atomic::inc(&os::Solaris::_os_thread_count);
1077
1078 // Store info on the Solaris thread into the OSThread
1079 osthread->set_thread_id(tid);
1080
1081 // Remember that we created this thread so we can set priority on it
1082 osthread->set_vm_created();
1083
1084 // Initial thread state is INITIALIZED, not SUSPENDED
1085 osthread->set_state(INITIALIZED);
1086
1087 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1088 return true;
1089 }
1090
1091 /* defined for >= Solaris 10. This allows builds on earlier versions
1092 * of Solaris to take advantage of the newly reserved Solaris JVM signals
1093 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1094 * and -XX:+UseAltSigs does nothing since these should have no conflict
1095 */
1096 #if !defined(SIGJVM1)
1097 #define SIGJVM1 39
1098 #define SIGJVM2 40
1099 #endif
1100
1101 debug_only(static bool signal_sets_initialized = false);
1102 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1103 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1104 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1105
1106 bool os::Solaris::is_sig_ignored(int sig) {
1107 struct sigaction oact;
1108 sigaction(sig, (struct sigaction*)NULL, &oact);
1109 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1110 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1111 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
1112 return true;
1113 else
1114 return false;
1115 }
1116
1117 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1118 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1119 static bool isJVM1available() {
1120 return SIGJVM1 < SIGRTMIN;
1121 }
1122
1123 void os::Solaris::signal_sets_init() {
1124 // Should also have an assertion stating we are still single-threaded.
1125 assert(!signal_sets_initialized, "Already initialized");
1126 // Fill in signals that are necessarily unblocked for all threads in
1127 // the VM. Currently, we unblock the following signals:
1128 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1129 // by -Xrs (=ReduceSignalUsage));
1130 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1131 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1132 // the dispositions or masks wrt these signals.
1133 // Programs embedding the VM that want to use the above signals for their
1134 // own purposes must, at this time, use the "-Xrs" option to prevent
1135 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1136 // (See bug 4345157, and other related bugs).
1137 // In reality, though, unblocking these signals is really a nop, since
1138 // these signals are not blocked by default.
1139 sigemptyset(&unblocked_sigs);
1140 sigemptyset(&allowdebug_blocked_sigs);
1141 sigaddset(&unblocked_sigs, SIGILL);
1142 sigaddset(&unblocked_sigs, SIGSEGV);
1143 sigaddset(&unblocked_sigs, SIGBUS);
1144 sigaddset(&unblocked_sigs, SIGFPE);
1145
1146 if (isJVM1available) {
1147 os::Solaris::set_SIGinterrupt(SIGJVM1);
1148 os::Solaris::set_SIGasync(SIGJVM2);
1149 } else if (UseAltSigs) {
1150 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1151 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1152 } else {
1153 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1154 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1155 }
1156
1157 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1158 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1159
1160 if (!ReduceSignalUsage) {
1161 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1162 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1163 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1164 }
1165 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1166 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1167 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1168 }
1169 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1170 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1171 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1172 }
1173 }
1174 // Fill in signals that are blocked by all but the VM thread.
1175 sigemptyset(&vm_sigs);
1176 if (!ReduceSignalUsage)
1177 sigaddset(&vm_sigs, BREAK_SIGNAL);
1178 debug_only(signal_sets_initialized = true);
1179
1180 // For diagnostics only used in run_periodic_checks
1181 sigemptyset(&check_signal_done);
1182 }
1183
1184 // These are signals that are unblocked while a thread is running Java.
1185 // (For some reason, they get blocked by default.)
1186 sigset_t* os::Solaris::unblocked_signals() {
1187 assert(signal_sets_initialized, "Not initialized");
1188 return &unblocked_sigs;
1189 }
1190
1191 // These are the signals that are blocked while a (non-VM) thread is
1192 // running Java. Only the VM thread handles these signals.
1193 sigset_t* os::Solaris::vm_signals() {
1194 assert(signal_sets_initialized, "Not initialized");
1195 return &vm_sigs;
1196 }
1197
1198 // These are signals that are blocked during cond_wait to allow debugger in
1199 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1200 assert(signal_sets_initialized, "Not initialized");
1201 return &allowdebug_blocked_sigs;
1202 }
1203
1204
1205 void _handle_uncaught_cxx_exception() {
1206 VMError err("An uncaught C++ exception");
1207 err.report_and_die();
1208 }
1209
1210
1211 // First crack at OS-specific initialization, from inside the new thread.
1212 void os::initialize_thread(Thread* thr) {
1213 int r = thr_main() ;
1214 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
1215 if (r) {
1216 JavaThread* jt = (JavaThread *)thr;
1217 assert(jt != NULL,"Sanity check");
1218 size_t stack_size;
1219 address base = jt->stack_base();
1220 if (Arguments::created_by_java_launcher()) {
1221 // Use 2MB to allow for Solaris 7 64 bit mode.
1222 stack_size = JavaThread::stack_size_at_create() == 0
1223 ? 2048*K : JavaThread::stack_size_at_create();
1224
1225 // There are rare cases when we may have already used more than
1226 // the basic stack size allotment before this method is invoked.
1227 // Attempt to allow for a normally sized java_stack.
1228 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1229 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1230 } else {
1231 // 6269555: If we were not created by a Java launcher, i.e. if we are
1232 // running embedded in a native application, treat the primordial thread
1233 // as much like a native attached thread as possible. This means using
1234 // the current stack size from thr_stksegment(), unless it is too large
1235 // to reliably setup guard pages. A reasonable max size is 8MB.
1236 size_t current_size = current_stack_size();
1237 // This should never happen, but just in case....
1238 if (current_size == 0) current_size = 2 * K * K;
1239 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1240 }
1241 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1242 stack_size = (size_t)(base - bottom);
1243
1244 assert(stack_size > 0, "Stack size calculation problem");
1245
1246 if (stack_size > jt->stack_size()) {
1247 NOT_PRODUCT(
1248 struct rlimit limits;
1249 getrlimit(RLIMIT_STACK, &limits);
1250 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1251 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1252 )
1253 tty->print_cr(
1254 "Stack size of %d Kb exceeds current limit of %d Kb.\n"
1255 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1256 "See limit(1) to increase the stack size limit.",
1257 stack_size / K, jt->stack_size() / K);
1258 vm_exit(1);
1259 }
1260 assert(jt->stack_size() >= stack_size,
1261 "Attempt to map more stack than was allocated");
1262 jt->set_stack_size(stack_size);
1263 }
1264
1265 // With the T2 libthread (T1 is no longer supported) threads are always bound
1266 // and we use stackbanging in all cases.
1267
1268 os::Solaris::init_thread_fpu_state();
1269 std::set_terminate(_handle_uncaught_cxx_exception);
1270 }
1271
1272
1273
1274 // Free Solaris resources related to the OSThread
1275 void os::free_thread(OSThread* osthread) {
1276 assert(osthread != NULL, "os::free_thread but osthread not set");
1277
1278
1279 // We are told to free resources of the argument thread,
1280 // but we can only really operate on the current thread.
1281 // The main thread must take the VMThread down synchronously
1282 // before the main thread exits and frees up CodeHeap
1283 guarantee((Thread::current()->osthread() == osthread
1284 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1285 if (Thread::current()->osthread() == osthread) {
1286 // Restore caller's signal mask
1287 sigset_t sigmask = osthread->caller_sigmask();
1288 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1289 }
1290 delete osthread;
1291 }
1292
1293 void os::pd_start_thread(Thread* thread) {
1294 int status = thr_continue(thread->osthread()->thread_id());
1295 assert_status(status == 0, status, "thr_continue failed");
1296 }
1297
1298
1299 intx os::current_thread_id() {
1300 return (intx)thr_self();
1301 }
1302
1303 static pid_t _initial_pid = 0;
1304
1305 int os::current_process_id() {
1306 return (int)(_initial_pid ? _initial_pid : getpid());
1307 }
1308
1309 int os::allocate_thread_local_storage() {
1310 // %%% in Win32 this allocates a memory segment pointed to by a
1311 // register. Dan Stein can implement a similar feature in
1312 // Solaris. Alternatively, the VM can do the same thing
1313 // explicitly: malloc some storage and keep the pointer in a
1314 // register (which is part of the thread's context) (or keep it
1315 // in TLS).
1316 // %%% In current versions of Solaris, thr_self and TSD can
1317 // be accessed via short sequences of displaced indirections.
1318 // The value of thr_self is available as %g7(36).
1319 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1320 // assuming that the current thread already has a value bound to k.
1321 // It may be worth experimenting with such access patterns,
1322 // and later having the parameters formally exported from a Solaris
1323 // interface. I think, however, that it will be faster to
1324 // maintain the invariant that %g2 always contains the
1325 // JavaThread in Java code, and have stubs simply
1326 // treat %g2 as a caller-save register, preserving it in a %lN.
1327 thread_key_t tk;
1328 if (thr_keycreate( &tk, NULL ) )
1329 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1330 "(%s)", strerror(errno)));
1331 return int(tk);
1332 }
1333
1334 void os::free_thread_local_storage(int index) {
1335 // %%% don't think we need anything here
1336 // if ( pthread_key_delete((pthread_key_t) tk) )
1337 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1338 }
1339
1340 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific
1341 // small number - point is NO swap space available
1342 void os::thread_local_storage_at_put(int index, void* value) {
1343 // %%% this is used only in threadLocalStorage.cpp
1344 if (thr_setspecific((thread_key_t)index, value)) {
1345 if (errno == ENOMEM) {
1346 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR,
1347 "thr_setspecific: out of swap space");
1348 } else {
1349 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1350 "(%s)", strerror(errno)));
1351 }
1352 } else {
1353 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ;
1354 }
1355 }
1356
1357 // This function could be called before TLS is initialized, for example, when
1358 // VM receives an async signal or when VM causes a fatal error during
1359 // initialization. Return NULL if thr_getspecific() fails.
1360 void* os::thread_local_storage_at(int index) {
1361 // %%% this is used only in threadLocalStorage.cpp
1362 void* r = NULL;
1363 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1364 }
1365
1366
1367 // gethrtime can move backwards if read from one cpu and then a different cpu
1368 // getTimeNanos is guaranteed to not move backward on Solaris
1369 // local spinloop created as faster for a CAS on an int than
1370 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not
1371 // supported on sparc v8 or pre supports_cx8 intel boxes.
1372 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong
1373 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes
1374 inline hrtime_t oldgetTimeNanos() {
1375 int gotlock = LOCK_INVALID;
1376 hrtime_t newtime = gethrtime();
1377
1378 for (;;) {
1379 // grab lock for max_hrtime
1380 int curlock = max_hrtime_lock;
1381 if (curlock & LOCK_BUSY) continue;
1382 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue;
1383 if (newtime > max_hrtime) {
1384 max_hrtime = newtime;
1385 } else {
1386 newtime = max_hrtime;
1387 }
1388 // release lock
1389 max_hrtime_lock = LOCK_FREE;
1390 return newtime;
1391 }
1392 }
1393 // gethrtime can move backwards if read from one cpu and then a different cpu
1394 // getTimeNanos is guaranteed to not move backward on Solaris
1395 inline hrtime_t getTimeNanos() {
1396 if (VM_Version::supports_cx8()) {
1397 const hrtime_t now = gethrtime();
1398 if (AssumeMonotonicOSTimers) {
1399 return now;
1400 }
1401
1402 const hrtime_t prev = max_hrtime;
1403 if (now <= prev) {
1404 return prev; // same or retrograde time;
1405 }
1406 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1407 assert(obsv >= prev, "invariant"); // Monotonicity
1408 // If the CAS succeeded then we're done and return "now".
1409 // If the CAS failed and the observed value "obs" is >= now then
1410 // we should return "obs". If the CAS failed and now > obs > prv then
1411 // some other thread raced this thread and installed a new value, in which case
1412 // we could either (a) retry the entire operation, (b) retry trying to install now
1413 // or (c) just return obs. We use (c). No loop is required although in some cases
1414 // we might discard a higher "now" value in deference to a slightly lower but freshly
1415 // installed obs value. That's entirely benign -- it admits no new orderings compared
1416 // to (a) or (b) -- and greatly reduces coherence traffic.
1417 // We might also condition (c) on the magnitude of the delta between obs and now.
1418 // Avoiding excessive CAS operations to hot RW locations is critical.
1419 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate
1420 return (prev == obsv) ? now : obsv ;
1421 } else {
1422 return oldgetTimeNanos();
1423 }
1424 }
1425
1426 // Time since start-up in seconds to a fine granularity.
1427 // Used by VMSelfDestructTimer and the MemProfiler.
1428 double os::elapsedTime() {
1429 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1430 }
1431
1432 jlong os::elapsed_counter() {
1433 return (jlong)(getTimeNanos() - first_hrtime);
1434 }
1435
1436 jlong os::elapsed_frequency() {
1437 return hrtime_hz;
1438 }
1439
1440 // Return the real, user, and system times in seconds from an
1441 // arbitrary fixed point in the past.
1442 bool os::getTimesSecs(double* process_real_time,
1443 double* process_user_time,
1444 double* process_system_time) {
1445 struct tms ticks;
1446 clock_t real_ticks = times(&ticks);
1447
1448 if (real_ticks == (clock_t) (-1)) {
1449 return false;
1450 } else {
1451 double ticks_per_second = (double) clock_tics_per_sec;
1452 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1453 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1454 // For consistency return the real time from getTimeNanos()
1455 // converted to seconds.
1456 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1457
1458 return true;
1459 }
1460 }
1461
1462 bool os::supports_vtime() { return true; }
1463
1464 bool os::enable_vtime() {
1465 int fd = ::open("/proc/self/ctl", O_WRONLY);
1466 if (fd == -1)
1467 return false;
1468
1469 long cmd[] = { PCSET, PR_MSACCT };
1470 int res = ::write(fd, cmd, sizeof(long) * 2);
1471 ::close(fd);
1472 if (res != sizeof(long) * 2)
1473 return false;
1474
1475 return true;
1476 }
1477
1478 bool os::vtime_enabled() {
1479 int fd = ::open("/proc/self/status", O_RDONLY);
1480 if (fd == -1)
1481 return false;
1482
1483 pstatus_t status;
1484 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1485 ::close(fd);
1486 if (res != sizeof(pstatus_t))
1487 return false;
1488
1489 return status.pr_flags & PR_MSACCT;
1490 }
1491
1492 double os::elapsedVTime() {
1493 return (double)gethrvtime() / (double)hrtime_hz;
1494 }
1495
1496 // Used internally for comparisons only
1497 // getTimeMillis guaranteed to not move backwards on Solaris
1498 jlong getTimeMillis() {
1499 jlong nanotime = getTimeNanos();
1500 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1501 }
1502
1503 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1504 jlong os::javaTimeMillis() {
1505 timeval t;
1506 if (gettimeofday( &t, NULL) == -1)
1507 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1508 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1509 }
1510
1511 jlong os::javaTimeNanos() {
1512 return (jlong)getTimeNanos();
1513 }
1514
1515 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1516 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1517 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1518 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1519 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1520 }
1521
1522 char * os::local_time_string(char *buf, size_t buflen) {
1523 struct tm t;
1524 time_t long_time;
1525 time(&long_time);
1526 localtime_r(&long_time, &t);
1527 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1528 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1529 t.tm_hour, t.tm_min, t.tm_sec);
1530 return buf;
1531 }
1532
1533 // Note: os::shutdown() might be called very early during initialization, or
1534 // called from signal handler. Before adding something to os::shutdown(), make
1535 // sure it is async-safe and can handle partially initialized VM.
1536 void os::shutdown() {
1537
1538 // allow PerfMemory to attempt cleanup of any persistent resources
1539 perfMemory_exit();
1540
1541 // needs to remove object in file system
1542 AttachListener::abort();
1543
1544 // flush buffered output, finish log files
1545 ostream_abort();
1546
1547 // Check for abort hook
1548 abort_hook_t abort_hook = Arguments::abort_hook();
1549 if (abort_hook != NULL) {
1550 abort_hook();
1551 }
1552 }
1553
1554 // Note: os::abort() might be called very early during initialization, or
1555 // called from signal handler. Before adding something to os::abort(), make
1556 // sure it is async-safe and can handle partially initialized VM.
1557 void os::abort(bool dump_core) {
1558 os::shutdown();
1559 if (dump_core) {
1560 #ifndef PRODUCT
1561 fdStream out(defaultStream::output_fd());
1562 out.print_raw("Current thread is ");
1563 char buf[16];
1564 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1565 out.print_raw_cr(buf);
1566 out.print_raw_cr("Dumping core ...");
1567 #endif
1568 ::abort(); // dump core (for debugging)
1569 }
1570
1571 ::exit(1);
1572 }
1573
1574 // Die immediately, no exit hook, no abort hook, no cleanup.
1575 void os::die() {
1576 ::abort(); // dump core (for debugging)
1577 }
1578
1579 // unused
1580 void os::set_error_file(const char *logfile) {}
1581
1582 // DLL functions
1583
1584 const char* os::dll_file_extension() { return ".so"; }
1585
1586 // This must be hard coded because it's the system's temporary
1587 // directory not the java application's temp directory, ala java.io.tmpdir.
1588 const char* os::get_temp_directory() { return "/tmp"; }
1589
1590 static bool file_exists(const char* filename) {
1591 struct stat statbuf;
1592 if (filename == NULL || strlen(filename) == 0) {
1593 return false;
1594 }
1595 return os::stat(filename, &statbuf) == 0;
1596 }
1597
1598 bool os::dll_build_name(char* buffer, size_t buflen,
1599 const char* pname, const char* fname) {
1600 bool retval = false;
1601 const size_t pnamelen = pname ? strlen(pname) : 0;
1602
1603 // Return error on buffer overflow.
1604 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1605 return retval;
1606 }
1607
1608 if (pnamelen == 0) {
1609 snprintf(buffer, buflen, "lib%s.so", fname);
1610 retval = true;
1611 } else if (strchr(pname, *os::path_separator()) != NULL) {
1612 int n;
1613 char** pelements = split_path(pname, &n);
1614 if (pelements == NULL) {
1615 return false;
1616 }
1617 for (int i = 0 ; i < n ; i++) {
1618 // really shouldn't be NULL but what the heck, check can't hurt
1619 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1620 continue; // skip the empty path values
1621 }
1622 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1623 if (file_exists(buffer)) {
1624 retval = true;
1625 break;
1626 }
1627 }
1628 // release the storage
1629 for (int i = 0 ; i < n ; i++) {
1630 if (pelements[i] != NULL) {
1631 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
1632 }
1633 }
1634 if (pelements != NULL) {
1635 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
1636 }
1637 } else {
1638 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1639 retval = true;
1640 }
1641 return retval;
1642 }
1643
1644 // check if addr is inside libjvm.so
1645 bool os::address_is_in_vm(address addr) {
1646 static address libjvm_base_addr;
1647 Dl_info dlinfo;
1648
1649 if (libjvm_base_addr == NULL) {
1650 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
1651 libjvm_base_addr = (address)dlinfo.dli_fbase;
1652 }
1653 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1654 }
1655
1656 if (dladdr((void *)addr, &dlinfo) != 0) {
1657 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1658 }
1659
1660 return false;
1661 }
1662
1663 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int);
1664 static dladdr1_func_type dladdr1_func = NULL;
1665
1666 bool os::dll_address_to_function_name(address addr, char *buf,
1667 int buflen, int * offset) {
1668 // buf is not optional, but offset is optional
1669 assert(buf != NULL, "sanity check");
1670
1671 Dl_info dlinfo;
1672
1673 // dladdr1_func was initialized in os::init()
1674 if (dladdr1_func != NULL) {
1675 // yes, we have dladdr1
1676
1677 // Support for dladdr1 is checked at runtime; it may be
1678 // available even if the vm is built on a machine that does
1679 // not have dladdr1 support. Make sure there is a value for
1680 // RTLD_DL_SYMENT.
1681 #ifndef RTLD_DL_SYMENT
1682 #define RTLD_DL_SYMENT 1
1683 #endif
1684 #ifdef _LP64
1685 Elf64_Sym * info;
1686 #else
1687 Elf32_Sym * info;
1688 #endif
1689 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1690 RTLD_DL_SYMENT) != 0) {
1691 // see if we have a matching symbol that covers our address
1692 if (dlinfo.dli_saddr != NULL &&
1693 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1694 if (dlinfo.dli_sname != NULL) {
1695 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1696 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1697 }
1698 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1699 return true;
1700 }
1701 }
1702 // no matching symbol so try for just file info
1703 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1704 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1705 buf, buflen, offset, dlinfo.dli_fname)) {
1706 return true;
1707 }
1708 }
1709 }
1710 buf[0] = '\0';
1711 if (offset != NULL) *offset = -1;
1712 return false;
1713 }
1714
1715 // no, only dladdr is available
1716 if (dladdr((void *)addr, &dlinfo) != 0) {
1717 // see if we have a matching symbol
1718 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
1719 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1720 jio_snprintf(buf, buflen, dlinfo.dli_sname);
1721 }
1722 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1723 return true;
1724 }
1725 // no matching symbol so try for just file info
1726 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1727 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1728 buf, buflen, offset, dlinfo.dli_fname)) {
1729 return true;
1730 }
1731 }
1732 }
1733 buf[0] = '\0';
1734 if (offset != NULL) *offset = -1;
1735 return false;
1736 }
1737
1738 bool os::dll_address_to_library_name(address addr, char* buf,
1739 int buflen, int* offset) {
1740 // buf is not optional, but offset is optional
1741 assert(buf != NULL, "sanity check");
1742
1743 Dl_info dlinfo;
1744
1745 if (dladdr((void*)addr, &dlinfo) != 0) {
1746 if (dlinfo.dli_fname != NULL) {
1747 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1748 }
1749 if (dlinfo.dli_fbase != NULL && offset != NULL) {
1750 *offset = addr - (address)dlinfo.dli_fbase;
1751 }
1752 return true;
1753 }
1754
1755 buf[0] = '\0';
1756 if (offset) *offset = -1;
1757 return false;
1758 }
1759
1760 // Prints the names and full paths of all opened dynamic libraries
1761 // for current process
1762 void os::print_dll_info(outputStream * st) {
1763 Dl_info dli;
1764 void *handle;
1765 Link_map *map;
1766 Link_map *p;
1767
1768 st->print_cr("Dynamic libraries:"); st->flush();
1769
1770 if (dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli) == 0 ||
1771 dli.dli_fname == NULL) {
1772 st->print_cr("Error: Cannot print dynamic libraries.");
1773 return;
1774 }
1775 handle = dlopen(dli.dli_fname, RTLD_LAZY);
1776 if (handle == NULL) {
1777 st->print_cr("Error: Cannot print dynamic libraries.");
1778 return;
1779 }
1780 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1781 if (map == NULL) {
1782 st->print_cr("Error: Cannot print dynamic libraries.");
1783 return;
1784 }
1785
1786 while (map->l_prev != NULL)
1787 map = map->l_prev;
1788
1789 while (map != NULL) {
1790 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
1791 map = map->l_next;
1792 }
1793
1794 dlclose(handle);
1795 }
1796
1797 // Loads .dll/.so and
1798 // in case of error it checks if .dll/.so was built for the
1799 // same architecture as Hotspot is running on
1800
1801 void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
1802 {
1803 void * result= ::dlopen(filename, RTLD_LAZY);
1804 if (result != NULL) {
1805 // Successful loading
1806 return result;
1807 }
1808
1809 Elf32_Ehdr elf_head;
1810
1811 // Read system error message into ebuf
1812 // It may or may not be overwritten below
1813 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
1814 ebuf[ebuflen-1]='\0';
1815 int diag_msg_max_length=ebuflen-strlen(ebuf);
1816 char* diag_msg_buf=ebuf+strlen(ebuf);
1817
1818 if (diag_msg_max_length==0) {
1819 // No more space in ebuf for additional diagnostics message
1820 return NULL;
1821 }
1822
1823
1824 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1825
1826 if (file_descriptor < 0) {
1827 // Can't open library, report dlerror() message
1828 return NULL;
1829 }
1830
1831 bool failed_to_read_elf_head=
1832 (sizeof(elf_head)!=
1833 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
1834
1835 ::close(file_descriptor);
1836 if (failed_to_read_elf_head) {
1837 // file i/o error - report dlerror() msg
1838 return NULL;
1839 }
1840
1841 typedef struct {
1842 Elf32_Half code; // Actual value as defined in elf.h
1843 Elf32_Half compat_class; // Compatibility of archs at VM's sense
1844 char elf_class; // 32 or 64 bit
1845 char endianess; // MSB or LSB
1846 char* name; // String representation
1847 } arch_t;
1848
1849 static const arch_t arch_array[]={
1850 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1851 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1852 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
1853 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
1854 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1855 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1856 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
1857 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
1858 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
1859 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
1860 };
1861
1862 #if (defined IA32)
1863 static Elf32_Half running_arch_code=EM_386;
1864 #elif (defined AMD64)
1865 static Elf32_Half running_arch_code=EM_X86_64;
1866 #elif (defined IA64)
1867 static Elf32_Half running_arch_code=EM_IA_64;
1868 #elif (defined __sparc) && (defined _LP64)
1869 static Elf32_Half running_arch_code=EM_SPARCV9;
1870 #elif (defined __sparc) && (!defined _LP64)
1871 static Elf32_Half running_arch_code=EM_SPARC;
1872 #elif (defined __powerpc64__)
1873 static Elf32_Half running_arch_code=EM_PPC64;
1874 #elif (defined __powerpc__)
1875 static Elf32_Half running_arch_code=EM_PPC;
1876 #elif (defined ARM)
1877 static Elf32_Half running_arch_code=EM_ARM;
1878 #else
1879 #error Method os::dll_load requires that one of following is defined:\
1880 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
1881 #endif
1882
1883 // Identify compatability class for VM's architecture and library's architecture
1884 // Obtain string descriptions for architectures
1885
1886 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
1887 int running_arch_index=-1;
1888
1889 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
1890 if (running_arch_code == arch_array[i].code) {
1891 running_arch_index = i;
1892 }
1893 if (lib_arch.code == arch_array[i].code) {
1894 lib_arch.compat_class = arch_array[i].compat_class;
1895 lib_arch.name = arch_array[i].name;
1896 }
1897 }
1898
1899 assert(running_arch_index != -1,
1900 "Didn't find running architecture code (running_arch_code) in arch_array");
1901 if (running_arch_index == -1) {
1902 // Even though running architecture detection failed
1903 // we may still continue with reporting dlerror() message
1904 return NULL;
1905 }
1906
1907 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
1908 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
1909 return NULL;
1910 }
1911
1912 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
1913 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
1914 return NULL;
1915 }
1916
1917 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
1918 if ( lib_arch.name!=NULL ) {
1919 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1920 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
1921 lib_arch.name, arch_array[running_arch_index].name);
1922 } else {
1923 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1924 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
1925 lib_arch.code,
1926 arch_array[running_arch_index].name);
1927 }
1928 }
1929
1930 return NULL;
1931 }
1932
1933 void* os::dll_lookup(void* handle, const char* name) {
1934 return dlsym(handle, name);
1935 }
1936
1937 void* os::get_default_process_handle() {
1938 return (void*)::dlopen(NULL, RTLD_LAZY);
1939 }
1940
1941 int os::stat(const char *path, struct stat *sbuf) {
1942 char pathbuf[MAX_PATH];
1943 if (strlen(path) > MAX_PATH - 1) {
1944 errno = ENAMETOOLONG;
1945 return -1;
1946 }
1947 os::native_path(strcpy(pathbuf, path));
1948 return ::stat(pathbuf, sbuf);
1949 }
1950
1951 static bool _print_ascii_file(const char* filename, outputStream* st) {
1952 int fd = ::open(filename, O_RDONLY);
1953 if (fd == -1) {
1954 return false;
1955 }
1956
1957 char buf[32];
1958 int bytes;
1959 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
1960 st->print_raw(buf, bytes);
1961 }
1962
1963 ::close(fd);
1964
1965 return true;
1966 }
1967
1968 void os::print_os_info_brief(outputStream* st) {
1969 os::Solaris::print_distro_info(st);
1970
1971 os::Posix::print_uname_info(st);
1972
1973 os::Solaris::print_libversion_info(st);
1974 }
1975
1976 void os::print_os_info(outputStream* st) {
1977 st->print("OS:");
1978
1979 os::Solaris::print_distro_info(st);
1980
1981 os::Posix::print_uname_info(st);
1982
1983 os::Solaris::print_libversion_info(st);
1984
1985 os::Posix::print_rlimit_info(st);
1986
1987 os::Posix::print_load_average(st);
1988 }
1989
1990 void os::Solaris::print_distro_info(outputStream* st) {
1991 if (!_print_ascii_file("/etc/release", st)) {
1992 st->print("Solaris");
1993 }
1994 st->cr();
1995 }
1996
1997 void os::Solaris::print_libversion_info(outputStream* st) {
1998 st->print(" (T2 libthread)");
1999 st->cr();
2000 }
2001
2002 static bool check_addr0(outputStream* st) {
2003 jboolean status = false;
2004 int fd = ::open("/proc/self/map",O_RDONLY);
2005 if (fd >= 0) {
2006 prmap_t p;
2007 while(::read(fd, &p, sizeof(p)) > 0) {
2008 if (p.pr_vaddr == 0x0) {
2009 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
2010 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
2011 st->print("Access:");
2012 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
2013 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
2014 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
2015 st->cr();
2016 status = true;
2017 }
2018 }
2019 ::close(fd);
2020 }
2021 return status;
2022 }
2023
2024 void os::pd_print_cpu_info(outputStream* st) {
2025 // Nothing to do for now.
2026 }
2027
2028 void os::print_memory_info(outputStream* st) {
2029 st->print("Memory:");
2030 st->print(" %dk page", os::vm_page_size()>>10);
2031 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2032 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2033 st->cr();
2034 (void) check_addr0(st);
2035 }
2036
2037 void os::print_siginfo(outputStream* st, void* siginfo) {
2038 const siginfo_t* si = (const siginfo_t*)siginfo;
2039
2040 os::Posix::print_siginfo_brief(st, si);
2041
2042 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2043 UseSharedSpaces) {
2044 FileMapInfo* mapinfo = FileMapInfo::current_info();
2045 if (mapinfo->is_in_shared_space(si->si_addr)) {
2046 st->print("\n\nError accessing class data sharing archive." \
2047 " Mapped file inaccessible during execution, " \
2048 " possible disk/network problem.");
2049 }
2050 }
2051 st->cr();
2052 }
2053
2054 // Moved from whole group, because we need them here for diagnostic
2055 // prints.
2056 #define OLDMAXSIGNUM 32
2057 static int Maxsignum = 0;
2058 static int *ourSigFlags = NULL;
2059
2060 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2061
2062 int os::Solaris::get_our_sigflags(int sig) {
2063 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2064 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2065 return ourSigFlags[sig];
2066 }
2067
2068 void os::Solaris::set_our_sigflags(int sig, int flags) {
2069 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2070 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2071 ourSigFlags[sig] = flags;
2072 }
2073
2074
2075 static const char* get_signal_handler_name(address handler,
2076 char* buf, int buflen) {
2077 int offset;
2078 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2079 if (found) {
2080 // skip directory names
2081 const char *p1, *p2;
2082 p1 = buf;
2083 size_t len = strlen(os::file_separator());
2084 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2085 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2086 } else {
2087 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2088 }
2089 return buf;
2090 }
2091
2092 static void print_signal_handler(outputStream* st, int sig,
2093 char* buf, size_t buflen) {
2094 struct sigaction sa;
2095
2096 sigaction(sig, NULL, &sa);
2097
2098 st->print("%s: ", os::exception_name(sig, buf, buflen));
2099
2100 address handler = (sa.sa_flags & SA_SIGINFO)
2101 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2102 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2103
2104 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2105 st->print("SIG_DFL");
2106 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2107 st->print("SIG_IGN");
2108 } else {
2109 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2110 }
2111
2112 st->print(", sa_mask[0]=");
2113 os::Posix::print_signal_set_short(st, &sa.sa_mask);
2114
2115 address rh = VMError::get_resetted_sighandler(sig);
2116 // May be, handler was resetted by VMError?
2117 if(rh != NULL) {
2118 handler = rh;
2119 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2120 }
2121
2122 st->print(", sa_flags=");
2123 os::Posix::print_sa_flags(st, sa.sa_flags);
2124
2125 // Check: is it our handler?
2126 if(handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2127 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2128 // It is our signal handler
2129 // check for flags
2130 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2131 st->print(
2132 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2133 os::Solaris::get_our_sigflags(sig));
2134 }
2135 }
2136 st->cr();
2137 }
2138
2139 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2140 st->print_cr("Signal Handlers:");
2141 print_signal_handler(st, SIGSEGV, buf, buflen);
2142 print_signal_handler(st, SIGBUS , buf, buflen);
2143 print_signal_handler(st, SIGFPE , buf, buflen);
2144 print_signal_handler(st, SIGPIPE, buf, buflen);
2145 print_signal_handler(st, SIGXFSZ, buf, buflen);
2146 print_signal_handler(st, SIGILL , buf, buflen);
2147 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2148 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2149 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2150 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2151 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2152 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2153 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2154 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2155 }
2156
2157 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2158
2159 // Find the full path to the current module, libjvm.so
2160 void os::jvm_path(char *buf, jint buflen) {
2161 // Error checking.
2162 if (buflen < MAXPATHLEN) {
2163 assert(false, "must use a large-enough buffer");
2164 buf[0] = '\0';
2165 return;
2166 }
2167 // Lazy resolve the path to current module.
2168 if (saved_jvm_path[0] != 0) {
2169 strcpy(buf, saved_jvm_path);
2170 return;
2171 }
2172
2173 Dl_info dlinfo;
2174 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2175 assert(ret != 0, "cannot locate libjvm");
2176 if (ret != 0 && dlinfo.dli_fname != NULL) {
2177 realpath((char *)dlinfo.dli_fname, buf);
2178 } else {
2179 buf[0] = '\0';
2180 return;
2181 }
2182
2183 if (Arguments::sun_java_launcher_is_altjvm()) {
2184 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical
2185 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".
2186 // If "/jre/lib/" appears at the right place in the string, then
2187 // assume we are installed in a JDK and we're done. Otherwise, check
2188 // for a JAVA_HOME environment variable and fix up the path so it
2189 // looks like libjvm.so is installed there (append a fake suffix
2190 // hotspot/libjvm.so).
2191 const char *p = buf + strlen(buf) - 1;
2192 for (int count = 0; p > buf && count < 5; ++count) {
2193 for (--p; p > buf && *p != '/'; --p)
2194 /* empty */ ;
2195 }
2196
2197 if (strncmp(p, "/jre/lib/", 9) != 0) {
2198 // Look for JAVA_HOME in the environment.
2199 char* java_home_var = ::getenv("JAVA_HOME");
2200 if (java_home_var != NULL && java_home_var[0] != 0) {
2201 char cpu_arch[12];
2202 char* jrelib_p;
2203 int len;
2204 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2205 #ifdef _LP64
2206 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2207 if (strcmp(cpu_arch, "sparc") == 0) {
2208 strcat(cpu_arch, "v9");
2209 } else if (strcmp(cpu_arch, "i386") == 0) {
2210 strcpy(cpu_arch, "amd64");
2211 }
2212 #endif
2213 // Check the current module name "libjvm.so".
2214 p = strrchr(buf, '/');
2215 assert(strstr(p, "/libjvm") == p, "invalid library name");
2216
2217 realpath(java_home_var, buf);
2218 // determine if this is a legacy image or modules image
2219 // modules image doesn't have "jre" subdirectory
2220 len = strlen(buf);
2221 jrelib_p = buf + len;
2222 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2223 if (0 != access(buf, F_OK)) {
2224 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2225 }
2226
2227 if (0 == access(buf, F_OK)) {
2228 // Use current module name "libjvm.so"
2229 len = strlen(buf);
2230 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
2231 } else {
2232 // Go back to path of .so
2233 realpath((char *)dlinfo.dli_fname, buf);
2234 }
2235 }
2236 }
2237 }
2238
2239 strcpy(saved_jvm_path, buf);
2240 }
2241
2242
2243 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2244 // no prefix required, not even "_"
2245 }
2246
2247
2248 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2249 // no suffix required
2250 }
2251
2252 // This method is a copy of JDK's sysGetLastErrorString
2253 // from src/solaris/hpi/src/system_md.c
2254
2255 size_t os::lasterror(char *buf, size_t len) {
2256
2257 if (errno == 0) return 0;
2258
2259 const char *s = ::strerror(errno);
2260 size_t n = ::strlen(s);
2261 if (n >= len) {
2262 n = len - 1;
2263 }
2264 ::strncpy(buf, s, n);
2265 buf[n] = '\0';
2266 return n;
2267 }
2268
2269
2270 // sun.misc.Signal
2271
2272 extern "C" {
2273 static void UserHandler(int sig, void *siginfo, void *context) {
2274 // Ctrl-C is pressed during error reporting, likely because the error
2275 // handler fails to abort. Let VM die immediately.
2276 if (sig == SIGINT && is_error_reported()) {
2277 os::die();
2278 }
2279
2280 os::signal_notify(sig);
2281 // We do not need to reinstate the signal handler each time...
2282 }
2283 }
2284
2285 void* os::user_handler() {
2286 return CAST_FROM_FN_PTR(void*, UserHandler);
2287 }
2288
2289 class Semaphore : public StackObj {
2290 public:
2291 Semaphore();
2292 ~Semaphore();
2293 void signal();
2294 void wait();
2295 bool trywait();
2296 bool timedwait(unsigned int sec, int nsec);
2297 private:
2298 sema_t _semaphore;
2299 };
2300
2301
2302 Semaphore::Semaphore() {
2303 sema_init(&_semaphore, 0, NULL, NULL);
2304 }
2305
2306 Semaphore::~Semaphore() {
2307 sema_destroy(&_semaphore);
2308 }
2309
2310 void Semaphore::signal() {
2311 sema_post(&_semaphore);
2312 }
2313
2314 void Semaphore::wait() {
2315 sema_wait(&_semaphore);
2316 }
2317
2318 bool Semaphore::trywait() {
2319 return sema_trywait(&_semaphore) == 0;
2320 }
2321
2322 bool Semaphore::timedwait(unsigned int sec, int nsec) {
2323 struct timespec ts;
2324 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec);
2325
2326 while (1) {
2327 int result = sema_timedwait(&_semaphore, &ts);
2328 if (result == 0) {
2329 return true;
2330 } else if (errno == EINTR) {
2331 continue;
2332 } else if (errno == ETIME) {
2333 return false;
2334 } else {
2335 return false;
2336 }
2337 }
2338 }
2339
2340 extern "C" {
2341 typedef void (*sa_handler_t)(int);
2342 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2343 }
2344
2345 void* os::signal(int signal_number, void* handler) {
2346 struct sigaction sigAct, oldSigAct;
2347 sigfillset(&(sigAct.sa_mask));
2348 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2349 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2350
2351 if (sigaction(signal_number, &sigAct, &oldSigAct))
2352 // -1 means registration failed
2353 return (void *)-1;
2354
2355 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2356 }
2357
2358 void os::signal_raise(int signal_number) {
2359 raise(signal_number);
2360 }
2361
2362 /*
2363 * The following code is moved from os.cpp for making this
2364 * code platform specific, which it is by its very nature.
2365 */
2366
2367 // a counter for each possible signal value
2368 static int Sigexit = 0;
2369 static int Maxlibjsigsigs;
2370 static jint *pending_signals = NULL;
2371 static int *preinstalled_sigs = NULL;
2372 static struct sigaction *chainedsigactions = NULL;
2373 static sema_t sig_sem;
2374 typedef int (*version_getting_t)();
2375 version_getting_t os::Solaris::get_libjsig_version = NULL;
2376 static int libjsigversion = NULL;
2377
2378 int os::sigexitnum_pd() {
2379 assert(Sigexit > 0, "signal memory not yet initialized");
2380 return Sigexit;
2381 }
2382
2383 void os::Solaris::init_signal_mem() {
2384 // Initialize signal structures
2385 Maxsignum = SIGRTMAX;
2386 Sigexit = Maxsignum+1;
2387 assert(Maxsignum >0, "Unable to obtain max signal number");
2388
2389 Maxlibjsigsigs = Maxsignum;
2390
2391 // pending_signals has one int per signal
2392 // The additional signal is for SIGEXIT - exit signal to signal_thread
2393 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2394 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2395
2396 if (UseSignalChaining) {
2397 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2398 * (Maxsignum + 1), mtInternal);
2399 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2400 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2401 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2402 }
2403 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal);
2404 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2405 }
2406
2407 void os::signal_init_pd() {
2408 int ret;
2409
2410 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2411 assert(ret == 0, "sema_init() failed");
2412 }
2413
2414 void os::signal_notify(int signal_number) {
2415 int ret;
2416
2417 Atomic::inc(&pending_signals[signal_number]);
2418 ret = ::sema_post(&sig_sem);
2419 assert(ret == 0, "sema_post() failed");
2420 }
2421
2422 static int check_pending_signals(bool wait_for_signal) {
2423 int ret;
2424 while (true) {
2425 for (int i = 0; i < Sigexit + 1; i++) {
2426 jint n = pending_signals[i];
2427 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2428 return i;
2429 }
2430 }
2431 if (!wait_for_signal) {
2432 return -1;
2433 }
2434 JavaThread *thread = JavaThread::current();
2435 ThreadBlockInVM tbivm(thread);
2436
2437 bool threadIsSuspended;
2438 do {
2439 thread->set_suspend_equivalent();
2440 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2441 while((ret = ::sema_wait(&sig_sem)) == EINTR)
2442 ;
2443 assert(ret == 0, "sema_wait() failed");
2444
2445 // were we externally suspended while we were waiting?
2446 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2447 if (threadIsSuspended) {
2448 //
2449 // The semaphore has been incremented, but while we were waiting
2450 // another thread suspended us. We don't want to continue running
2451 // while suspended because that would surprise the thread that
2452 // suspended us.
2453 //
2454 ret = ::sema_post(&sig_sem);
2455 assert(ret == 0, "sema_post() failed");
2456
2457 thread->java_suspend_self();
2458 }
2459 } while (threadIsSuspended);
2460 }
2461 }
2462
2463 int os::signal_lookup() {
2464 return check_pending_signals(false);
2465 }
2466
2467 int os::signal_wait() {
2468 return check_pending_signals(true);
2469 }
2470
2471 ////////////////////////////////////////////////////////////////////////////////
2472 // Virtual Memory
2473
2474 static int page_size = -1;
2475
2476 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2477 // clear this var if support is not available.
2478 static bool has_map_align = true;
2479
2480 int os::vm_page_size() {
2481 assert(page_size != -1, "must call os::init");
2482 return page_size;
2483 }
2484
2485 // Solaris allocates memory by pages.
2486 int os::vm_allocation_granularity() {
2487 assert(page_size != -1, "must call os::init");
2488 return page_size;
2489 }
2490
2491 static bool recoverable_mmap_error(int err) {
2492 // See if the error is one we can let the caller handle. This
2493 // list of errno values comes from the Solaris mmap(2) man page.
2494 switch (err) {
2495 case EBADF:
2496 case EINVAL:
2497 case ENOTSUP:
2498 // let the caller deal with these errors
2499 return true;
2500
2501 default:
2502 // Any remaining errors on this OS can cause our reserved mapping
2503 // to be lost. That can cause confusion where different data
2504 // structures think they have the same memory mapped. The worst
2505 // scenario is if both the VM and a library think they have the
2506 // same memory mapped.
2507 return false;
2508 }
2509 }
2510
2511 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec,
2512 int err) {
2513 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2514 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec,
2515 strerror(err), err);
2516 }
2517
2518 static void warn_fail_commit_memory(char* addr, size_t bytes,
2519 size_t alignment_hint, bool exec,
2520 int err) {
2521 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2522 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes,
2523 alignment_hint, exec, strerror(err), err);
2524 }
2525
2526 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) {
2527 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2528 size_t size = bytes;
2529 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2530 if (res != NULL) {
2531 if (UseNUMAInterleaving) {
2532 numa_make_global(addr, bytes);
2533 }
2534 return 0;
2535 }
2536
2537 int err = errno; // save errno from mmap() call in mmap_chunk()
2538
2539 if (!recoverable_mmap_error(err)) {
2540 warn_fail_commit_memory(addr, bytes, exec, err);
2541 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory.");
2542 }
2543
2544 return err;
2545 }
2546
2547 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2548 return Solaris::commit_memory_impl(addr, bytes, exec) == 0;
2549 }
2550
2551 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec,
2552 const char* mesg) {
2553 assert(mesg != NULL, "mesg must be specified");
2554 int err = os::Solaris::commit_memory_impl(addr, bytes, exec);
2555 if (err != 0) {
2556 // the caller wants all commit errors to exit with the specified mesg:
2557 warn_fail_commit_memory(addr, bytes, exec, err);
2558 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2559 }
2560 }
2561
2562 int os::Solaris::commit_memory_impl(char* addr, size_t bytes,
2563 size_t alignment_hint, bool exec) {
2564 int err = Solaris::commit_memory_impl(addr, bytes, exec);
2565 if (err == 0) {
2566 if (UseLargePages && (alignment_hint > (size_t)vm_page_size())) {
2567 // If the large page size has been set and the VM
2568 // is using large pages, use the large page size
2569 // if it is smaller than the alignment hint. This is
2570 // a case where the VM wants to use a larger alignment size
2571 // for its own reasons but still want to use large pages
2572 // (which is what matters to setting the mpss range.
2573 size_t page_size = 0;
2574 if (large_page_size() < alignment_hint) {
2575 assert(UseLargePages, "Expected to be here for large page use only");
2576 page_size = large_page_size();
2577 } else {
2578 // If the alignment hint is less than the large page
2579 // size, the VM wants a particular alignment (thus the hint)
2580 // for internal reasons. Try to set the mpss range using
2581 // the alignment_hint.
2582 page_size = alignment_hint;
2583 }
2584 // Since this is a hint, ignore any failures.
2585 (void)Solaris::setup_large_pages(addr, bytes, page_size);
2586 }
2587 }
2588 return err;
2589 }
2590
2591 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2592 bool exec) {
2593 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0;
2594 }
2595
2596 void os::pd_commit_memory_or_exit(char* addr, size_t bytes,
2597 size_t alignment_hint, bool exec,
2598 const char* mesg) {
2599 assert(mesg != NULL, "mesg must be specified");
2600 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec);
2601 if (err != 0) {
2602 // the caller wants all commit errors to exit with the specified mesg:
2603 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err);
2604 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2605 }
2606 }
2607
2608 // Uncommit the pages in a specified region.
2609 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2610 if (madvise(addr, bytes, MADV_FREE) < 0) {
2611 debug_only(warning("MADV_FREE failed."));
2612 return;
2613 }
2614 }
2615
2616 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2617 return os::commit_memory(addr, size, !ExecMem);
2618 }
2619
2620 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2621 return os::uncommit_memory(addr, size);
2622 }
2623
2624 // Change the page size in a given range.
2625 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2626 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2627 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2628 if (UseLargePages) {
2629 Solaris::setup_large_pages(addr, bytes, alignment_hint);
2630 }
2631 }
2632
2633 // Tell the OS to make the range local to the first-touching LWP
2634 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2635 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2636 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2637 debug_only(warning("MADV_ACCESS_LWP failed."));
2638 }
2639 }
2640
2641 // Tell the OS that this range would be accessed from different LWPs.
2642 void os::numa_make_global(char *addr, size_t bytes) {
2643 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2644 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2645 debug_only(warning("MADV_ACCESS_MANY failed."));
2646 }
2647 }
2648
2649 // Get the number of the locality groups.
2650 size_t os::numa_get_groups_num() {
2651 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2652 return n != -1 ? n : 1;
2653 }
2654
2655 // Get a list of leaf locality groups. A leaf lgroup is group that
2656 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2657 // board. An LWP is assigned to one of these groups upon creation.
2658 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2659 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2660 ids[0] = 0;
2661 return 1;
2662 }
2663 int result_size = 0, top = 1, bottom = 0, cur = 0;
2664 for (int k = 0; k < size; k++) {
2665 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2666 (Solaris::lgrp_id_t*)&ids[top], size - top);
2667 if (r == -1) {
2668 ids[0] = 0;
2669 return 1;
2670 }
2671 if (!r) {
2672 // That's a leaf node.
2673 assert (bottom <= cur, "Sanity check");
2674 // Check if the node has memory
2675 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2676 NULL, 0, LGRP_RSRC_MEM) > 0) {
2677 ids[bottom++] = ids[cur];
2678 }
2679 }
2680 top += r;
2681 cur++;
2682 }
2683 if (bottom == 0) {
2684 // Handle a situation, when the OS reports no memory available.
2685 // Assume UMA architecture.
2686 ids[0] = 0;
2687 return 1;
2688 }
2689 return bottom;
2690 }
2691
2692 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2693 bool os::numa_topology_changed() {
2694 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2695 if (is_stale != -1 && is_stale) {
2696 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2697 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2698 assert(c != 0, "Failure to initialize LGRP API");
2699 Solaris::set_lgrp_cookie(c);
2700 return true;
2701 }
2702 return false;
2703 }
2704
2705 // Get the group id of the current LWP.
2706 int os::numa_get_group_id() {
2707 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2708 if (lgrp_id == -1) {
2709 return 0;
2710 }
2711 const int size = os::numa_get_groups_num();
2712 int *ids = (int*)alloca(size * sizeof(int));
2713
2714 // Get the ids of all lgroups with memory; r is the count.
2715 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2716 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2717 if (r <= 0) {
2718 return 0;
2719 }
2720 return ids[os::random() % r];
2721 }
2722
2723 // Request information about the page.
2724 bool os::get_page_info(char *start, page_info* info) {
2725 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2726 uint64_t addr = (uintptr_t)start;
2727 uint64_t outdata[2];
2728 uint_t validity = 0;
2729
2730 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2731 return false;
2732 }
2733
2734 info->size = 0;
2735 info->lgrp_id = -1;
2736
2737 if ((validity & 1) != 0) {
2738 if ((validity & 2) != 0) {
2739 info->lgrp_id = outdata[0];
2740 }
2741 if ((validity & 4) != 0) {
2742 info->size = outdata[1];
2743 }
2744 return true;
2745 }
2746 return false;
2747 }
2748
2749 // Scan the pages from start to end until a page different than
2750 // the one described in the info parameter is encountered.
2751 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
2752 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2753 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2754 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1];
2755 uint_t validity[MAX_MEMINFO_CNT];
2756
2757 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2758 uint64_t p = (uint64_t)start;
2759 while (p < (uint64_t)end) {
2760 addrs[0] = p;
2761 size_t addrs_count = 1;
2762 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2763 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2764 addrs_count++;
2765 }
2766
2767 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2768 return NULL;
2769 }
2770
2771 size_t i = 0;
2772 for (; i < addrs_count; i++) {
2773 if ((validity[i] & 1) != 0) {
2774 if ((validity[i] & 4) != 0) {
2775 if (outdata[types * i + 1] != page_expected->size) {
2776 break;
2777 }
2778 } else
2779 if (page_expected->size != 0) {
2780 break;
2781 }
2782
2783 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2784 if (outdata[types * i] != page_expected->lgrp_id) {
2785 break;
2786 }
2787 }
2788 } else {
2789 return NULL;
2790 }
2791 }
2792
2793 if (i < addrs_count) {
2794 if ((validity[i] & 2) != 0) {
2795 page_found->lgrp_id = outdata[types * i];
2796 } else {
2797 page_found->lgrp_id = -1;
2798 }
2799 if ((validity[i] & 4) != 0) {
2800 page_found->size = outdata[types * i + 1];
2801 } else {
2802 page_found->size = 0;
2803 }
2804 return (char*)addrs[i];
2805 }
2806
2807 p = addrs[addrs_count - 1] + page_size;
2808 }
2809 return end;
2810 }
2811
2812 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2813 size_t size = bytes;
2814 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2815 // uncommitted page. Otherwise, the read/write might succeed if we
2816 // have enough swap space to back the physical page.
2817 return
2818 NULL != Solaris::mmap_chunk(addr, size,
2819 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2820 PROT_NONE);
2821 }
2822
2823 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2824 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2825
2826 if (b == MAP_FAILED) {
2827 return NULL;
2828 }
2829 return b;
2830 }
2831
2832 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) {
2833 char* addr = requested_addr;
2834 int flags = MAP_PRIVATE | MAP_NORESERVE;
2835
2836 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap");
2837
2838 if (fixed) {
2839 flags |= MAP_FIXED;
2840 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
2841 flags |= MAP_ALIGN;
2842 addr = (char*) alignment_hint;
2843 }
2844
2845 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2846 // uncommitted page. Otherwise, the read/write might succeed if we
2847 // have enough swap space to back the physical page.
2848 return mmap_chunk(addr, bytes, flags, PROT_NONE);
2849 }
2850
2851 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
2852 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL));
2853
2854 guarantee(requested_addr == NULL || requested_addr == addr,
2855 "OS failed to return requested mmap address.");
2856 return addr;
2857 }
2858
2859 // Reserve memory at an arbitrary address, only if that area is
2860 // available (and not reserved for something else).
2861
2862 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2863 const int max_tries = 10;
2864 char* base[max_tries];
2865 size_t size[max_tries];
2866
2867 // Solaris adds a gap between mmap'ed regions. The size of the gap
2868 // is dependent on the requested size and the MMU. Our initial gap
2869 // value here is just a guess and will be corrected later.
2870 bool had_top_overlap = false;
2871 bool have_adjusted_gap = false;
2872 size_t gap = 0x400000;
2873
2874 // Assert only that the size is a multiple of the page size, since
2875 // that's all that mmap requires, and since that's all we really know
2876 // about at this low abstraction level. If we need higher alignment,
2877 // we can either pass an alignment to this method or verify alignment
2878 // in one of the methods further up the call chain. See bug 5044738.
2879 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
2880
2881 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
2882 // Give it a try, if the kernel honors the hint we can return immediately.
2883 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
2884
2885 volatile int err = errno;
2886 if (addr == requested_addr) {
2887 return addr;
2888 } else if (addr != NULL) {
2889 pd_unmap_memory(addr, bytes);
2890 }
2891
2892 if (PrintMiscellaneous && Verbose) {
2893 char buf[256];
2894 buf[0] = '\0';
2895 if (addr == NULL) {
2896 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
2897 }
2898 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
2899 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
2900 "%s", bytes, requested_addr, addr, buf);
2901 }
2902
2903 // Address hint method didn't work. Fall back to the old method.
2904 // In theory, once SNV becomes our oldest supported platform, this
2905 // code will no longer be needed.
2906 //
2907 // Repeatedly allocate blocks until the block is allocated at the
2908 // right spot. Give up after max_tries.
2909 int i;
2910 for (i = 0; i < max_tries; ++i) {
2911 base[i] = reserve_memory(bytes);
2912
2913 if (base[i] != NULL) {
2914 // Is this the block we wanted?
2915 if (base[i] == requested_addr) {
2916 size[i] = bytes;
2917 break;
2918 }
2919
2920 // check that the gap value is right
2921 if (had_top_overlap && !have_adjusted_gap) {
2922 size_t actual_gap = base[i-1] - base[i] - bytes;
2923 if (gap != actual_gap) {
2924 // adjust the gap value and retry the last 2 allocations
2925 assert(i > 0, "gap adjustment code problem");
2926 have_adjusted_gap = true; // adjust the gap only once, just in case
2927 gap = actual_gap;
2928 if (PrintMiscellaneous && Verbose) {
2929 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
2930 }
2931 unmap_memory(base[i], bytes);
2932 unmap_memory(base[i-1], size[i-1]);
2933 i-=2;
2934 continue;
2935 }
2936 }
2937
2938 // Does this overlap the block we wanted? Give back the overlapped
2939 // parts and try again.
2940 //
2941 // There is still a bug in this code: if top_overlap == bytes,
2942 // the overlap is offset from requested region by the value of gap.
2943 // In this case giving back the overlapped part will not work,
2944 // because we'll give back the entire block at base[i] and
2945 // therefore the subsequent allocation will not generate a new gap.
2946 // This could be fixed with a new algorithm that used larger
2947 // or variable size chunks to find the requested region -
2948 // but such a change would introduce additional complications.
2949 // It's rare enough that the planets align for this bug,
2950 // so we'll just wait for a fix for 6204603/5003415 which
2951 // will provide a mmap flag to allow us to avoid this business.
2952
2953 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
2954 if (top_overlap >= 0 && top_overlap < bytes) {
2955 had_top_overlap = true;
2956 unmap_memory(base[i], top_overlap);
2957 base[i] += top_overlap;
2958 size[i] = bytes - top_overlap;
2959 } else {
2960 size_t bottom_overlap = base[i] + bytes - requested_addr;
2961 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
2962 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
2963 warning("attempt_reserve_memory_at: possible alignment bug");
2964 }
2965 unmap_memory(requested_addr, bottom_overlap);
2966 size[i] = bytes - bottom_overlap;
2967 } else {
2968 size[i] = bytes;
2969 }
2970 }
2971 }
2972 }
2973
2974 // Give back the unused reserved pieces.
2975
2976 for (int j = 0; j < i; ++j) {
2977 if (base[j] != NULL) {
2978 unmap_memory(base[j], size[j]);
2979 }
2980 }
2981
2982 return (i < max_tries) ? requested_addr : NULL;
2983 }
2984
2985 bool os::pd_release_memory(char* addr, size_t bytes) {
2986 size_t size = bytes;
2987 return munmap(addr, size) == 0;
2988 }
2989
2990 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
2991 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
2992 "addr must be page aligned");
2993 int retVal = mprotect(addr, bytes, prot);
2994 return retVal == 0;
2995 }
2996
2997 // Protect memory (Used to pass readonly pages through
2998 // JNI GetArray<type>Elements with empty arrays.)
2999 // Also, used for serialization page and for compressed oops null pointer
3000 // checking.
3001 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3002 bool is_committed) {
3003 unsigned int p = 0;
3004 switch (prot) {
3005 case MEM_PROT_NONE: p = PROT_NONE; break;
3006 case MEM_PROT_READ: p = PROT_READ; break;
3007 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3008 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3009 default:
3010 ShouldNotReachHere();
3011 }
3012 // is_committed is unused.
3013 return solaris_mprotect(addr, bytes, p);
3014 }
3015
3016 // guard_memory and unguard_memory only happens within stack guard pages.
3017 // Since ISM pertains only to the heap, guard and unguard memory should not
3018 /// happen with an ISM region.
3019 bool os::guard_memory(char* addr, size_t bytes) {
3020 return solaris_mprotect(addr, bytes, PROT_NONE);
3021 }
3022
3023 bool os::unguard_memory(char* addr, size_t bytes) {
3024 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3025 }
3026
3027 // Large page support
3028 static size_t _large_page_size = 0;
3029
3030 // Insertion sort for small arrays (descending order).
3031 static void insertion_sort_descending(size_t* array, int len) {
3032 for (int i = 0; i < len; i++) {
3033 size_t val = array[i];
3034 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3035 size_t tmp = array[key];
3036 array[key] = array[key - 1];
3037 array[key - 1] = tmp;
3038 }
3039 }
3040 }
3041
3042 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) {
3043 const unsigned int usable_count = VM_Version::page_size_count();
3044 if (usable_count == 1) {
3045 return false;
3046 }
3047
3048 // Find the right getpagesizes interface. When solaris 11 is the minimum
3049 // build platform, getpagesizes() (without the '2') can be called directly.
3050 typedef int (*gps_t)(size_t[], int);
3051 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3052 if (gps_func == NULL) {
3053 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3054 if (gps_func == NULL) {
3055 if (warn) {
3056 warning("MPSS is not supported by the operating system.");
3057 }
3058 return false;
3059 }
3060 }
3061
3062 // Fill the array of page sizes.
3063 int n = (*gps_func)(_page_sizes, page_sizes_max);
3064 assert(n > 0, "Solaris bug?");
3065
3066 if (n == page_sizes_max) {
3067 // Add a sentinel value (necessary only if the array was completely filled
3068 // since it is static (zeroed at initialization)).
3069 _page_sizes[--n] = 0;
3070 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3071 }
3072 assert(_page_sizes[n] == 0, "missing sentinel");
3073 trace_page_sizes("available page sizes", _page_sizes, n);
3074
3075 if (n == 1) return false; // Only one page size available.
3076
3077 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3078 // select up to usable_count elements. First sort the array, find the first
3079 // acceptable value, then copy the usable sizes to the top of the array and
3080 // trim the rest. Make sure to include the default page size :-).
3081 //
3082 // A better policy could get rid of the 4M limit by taking the sizes of the
3083 // important VM memory regions (java heap and possibly the code cache) into
3084 // account.
3085 insertion_sort_descending(_page_sizes, n);
3086 const size_t size_limit =
3087 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3088 int beg;
3089 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
3090 const int end = MIN2((int)usable_count, n) - 1;
3091 for (int cur = 0; cur < end; ++cur, ++beg) {
3092 _page_sizes[cur] = _page_sizes[beg];
3093 }
3094 _page_sizes[end] = vm_page_size();
3095 _page_sizes[end + 1] = 0;
3096
3097 if (_page_sizes[end] > _page_sizes[end - 1]) {
3098 // Default page size is not the smallest; sort again.
3099 insertion_sort_descending(_page_sizes, end + 1);
3100 }
3101 *page_size = _page_sizes[0];
3102
3103 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3104 return true;
3105 }
3106
3107 void os::large_page_init() {
3108 if (UseLargePages) {
3109 // print a warning if any large page related flag is specified on command line
3110 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3111 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3112
3113 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3114 }
3115 }
3116
3117 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) {
3118 // Signal to OS that we want large pages for addresses
3119 // from addr, addr + bytes
3120 struct memcntl_mha mpss_struct;
3121 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3122 mpss_struct.mha_pagesize = align;
3123 mpss_struct.mha_flags = 0;
3124 // Upon successful completion, memcntl() returns 0
3125 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) {
3126 debug_only(warning("Attempt to use MPSS failed."));
3127 return false;
3128 }
3129 return true;
3130 }
3131
3132 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) {
3133 fatal("os::reserve_memory_special should not be called on Solaris.");
3134 return NULL;
3135 }
3136
3137 bool os::release_memory_special(char* base, size_t bytes) {
3138 fatal("os::release_memory_special should not be called on Solaris.");
3139 return false;
3140 }
3141
3142 size_t os::large_page_size() {
3143 return _large_page_size;
3144 }
3145
3146 // MPSS allows application to commit large page memory on demand; with ISM
3147 // the entire memory region must be allocated as shared memory.
3148 bool os::can_commit_large_page_memory() {
3149 return true;
3150 }
3151
3152 bool os::can_execute_large_page_memory() {
3153 return true;
3154 }
3155
3156 // Read calls from inside the vm need to perform state transitions
3157 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3158 size_t res;
3159 JavaThread* thread = (JavaThread*)Thread::current();
3160 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3161 ThreadBlockInVM tbiv(thread);
3162 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3163 return res;
3164 }
3165
3166 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3167 size_t res;
3168 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
3169 "Assumed _thread_in_native");
3170 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3171 return res;
3172 }
3173
3174 void os::naked_short_sleep(jlong ms) {
3175 assert(ms < 1000, "Un-interruptable sleep, short time use only");
3176
3177 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but
3178 // Solaris requires -lrt for this.
3179 usleep((ms * 1000));
3180
3181 return;
3182 }
3183
3184 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3185 void os::infinite_sleep() {
3186 while (true) { // sleep forever ...
3187 ::sleep(100); // ... 100 seconds at a time
3188 }
3189 }
3190
3191 // Used to convert frequent JVM_Yield() to nops
3192 bool os::dont_yield() {
3193 if (DontYieldALot) {
3194 static hrtime_t last_time = 0;
3195 hrtime_t diff = getTimeNanos() - last_time;
3196
3197 if (diff < DontYieldALotInterval * 1000000)
3198 return true;
3199
3200 last_time += diff;
3201
3202 return false;
3203 }
3204 else {
3205 return false;
3206 }
3207 }
3208
3209 // Caveat: Solaris os::yield() causes a thread-state transition whereas
3210 // the linux and win32 implementations do not. This should be checked.
3211
3212 void os::yield() {
3213 // Yields to all threads with same or greater priority
3214 os::sleep(Thread::current(), 0, false);
3215 }
3216
3217 // Note that yield semantics are defined by the scheduling class to which
3218 // the thread currently belongs. Typically, yield will _not yield to
3219 // other equal or higher priority threads that reside on the dispatch queues
3220 // of other CPUs.
3221
3222 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
3223
3224 void os::yield_all() {
3225 // Yields to all threads, including threads with lower priorities
3226 os::sleep(Thread::current(), 1, false);
3227 }
3228
3229 // Interface for setting lwp priorities. If we are using T2 libthread,
3230 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3231 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3232 // function is meaningless in this mode so we must adjust the real lwp's priority
3233 // The routines below implement the getting and setting of lwp priorities.
3234 //
3235 // Note: T2 is now the only supported libthread. UseBoundThreads flag is
3236 // being deprecated and all threads are now BoundThreads
3237 //
3238 // Note: There are three priority scales used on Solaris. Java priotities
3239 // which range from 1 to 10, libthread "thr_setprio" scale which range
3240 // from 0 to 127, and the current scheduling class of the process we
3241 // are running in. This is typically from -60 to +60.
3242 // The setting of the lwp priorities in done after a call to thr_setprio
3243 // so Java priorities are mapped to libthread priorities and we map from
3244 // the latter to lwp priorities. We don't keep priorities stored in
3245 // Java priorities since some of our worker threads want to set priorities
3246 // higher than all Java threads.
3247 //
3248 // For related information:
3249 // (1) man -s 2 priocntl
3250 // (2) man -s 4 priocntl
3251 // (3) man dispadmin
3252 // = librt.so
3253 // = libthread/common/rtsched.c - thrp_setlwpprio().
3254 // = ps -cL <pid> ... to validate priority.
3255 // = sched_get_priority_min and _max
3256 // pthread_create
3257 // sched_setparam
3258 // pthread_setschedparam
3259 //
3260 // Assumptions:
3261 // + We assume that all threads in the process belong to the same
3262 // scheduling class. IE. an homogenous process.
3263 // + Must be root or in IA group to change change "interactive" attribute.
3264 // Priocntl() will fail silently. The only indication of failure is when
3265 // we read-back the value and notice that it hasn't changed.
3266 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3267 // + For RT, change timeslice as well. Invariant:
3268 // constant "priority integral"
3269 // Konst == TimeSlice * (60-Priority)
3270 // Given a priority, compute appropriate timeslice.
3271 // + Higher numerical values have higher priority.
3272
3273 // sched class attributes
3274 typedef struct {
3275 int schedPolicy; // classID
3276 int maxPrio;
3277 int minPrio;
3278 } SchedInfo;
3279
3280
3281 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3282
3283 #ifdef ASSERT
3284 static int ReadBackValidate = 1;
3285 #endif
3286 static int myClass = 0;
3287 static int myMin = 0;
3288 static int myMax = 0;
3289 static int myCur = 0;
3290 static bool priocntl_enable = false;
3291
3292 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3293 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3294
3295
3296 // lwp_priocntl_init
3297 //
3298 // Try to determine the priority scale for our process.
3299 //
3300 // Return errno or 0 if OK.
3301 //
3302 static int lwp_priocntl_init () {
3303 int rslt;
3304 pcinfo_t ClassInfo;
3305 pcparms_t ParmInfo;
3306 int i;
3307
3308 if (!UseThreadPriorities) return 0;
3309
3310 // If ThreadPriorityPolicy is 1, switch tables
3311 if (ThreadPriorityPolicy == 1) {
3312 for (i = 0 ; i < CriticalPriority+1; i++)
3313 os::java_to_os_priority[i] = prio_policy1[i];
3314 }
3315 if (UseCriticalJavaThreadPriority) {
3316 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3317 // See set_native_priority() and set_lwp_class_and_priority().
3318 // Save original MaxPriority mapping in case attempt to
3319 // use critical priority fails.
3320 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3321 // Set negative to distinguish from other priorities
3322 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3323 }
3324
3325 // Get IDs for a set of well-known scheduling classes.
3326 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3327 // the system. We should have a loop that iterates over the
3328 // classID values, which are known to be "small" integers.
3329
3330 strcpy(ClassInfo.pc_clname, "TS");
3331 ClassInfo.pc_cid = -1;
3332 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3333 if (rslt < 0) return errno;
3334 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3335 tsLimits.schedPolicy = ClassInfo.pc_cid;
3336 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3337 tsLimits.minPrio = -tsLimits.maxPrio;
3338
3339 strcpy(ClassInfo.pc_clname, "IA");
3340 ClassInfo.pc_cid = -1;
3341 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3342 if (rslt < 0) return errno;
3343 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3344 iaLimits.schedPolicy = ClassInfo.pc_cid;
3345 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3346 iaLimits.minPrio = -iaLimits.maxPrio;
3347
3348 strcpy(ClassInfo.pc_clname, "RT");
3349 ClassInfo.pc_cid = -1;
3350 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3351 if (rslt < 0) return errno;
3352 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3353 rtLimits.schedPolicy = ClassInfo.pc_cid;
3354 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3355 rtLimits.minPrio = 0;
3356
3357 strcpy(ClassInfo.pc_clname, "FX");
3358 ClassInfo.pc_cid = -1;
3359 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3360 if (rslt < 0) return errno;
3361 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3362 fxLimits.schedPolicy = ClassInfo.pc_cid;
3363 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3364 fxLimits.minPrio = 0;
3365
3366 // Query our "current" scheduling class.
3367 // This will normally be IA, TS or, rarely, FX or RT.
3368 memset(&ParmInfo, 0, sizeof(ParmInfo));
3369 ParmInfo.pc_cid = PC_CLNULL;
3370 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3371 if (rslt < 0) return errno;
3372 myClass = ParmInfo.pc_cid;
3373
3374 // We now know our scheduling classId, get specific information
3375 // about the class.
3376 ClassInfo.pc_cid = myClass;
3377 ClassInfo.pc_clname[0] = 0;
3378 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3379 if (rslt < 0) return errno;
3380
3381 if (ThreadPriorityVerbose) {
3382 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3383 }
3384
3385 memset(&ParmInfo, 0, sizeof(pcparms_t));
3386 ParmInfo.pc_cid = PC_CLNULL;
3387 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3388 if (rslt < 0) return errno;
3389
3390 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3391 myMin = rtLimits.minPrio;
3392 myMax = rtLimits.maxPrio;
3393 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3394 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3395 myMin = iaLimits.minPrio;
3396 myMax = iaLimits.maxPrio;
3397 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3398 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3399 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3400 myMin = tsLimits.minPrio;
3401 myMax = tsLimits.maxPrio;
3402 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3403 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3404 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3405 myMin = fxLimits.minPrio;
3406 myMax = fxLimits.maxPrio;
3407 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3408 } else {
3409 // No clue - punt
3410 if (ThreadPriorityVerbose)
3411 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
3412 return EINVAL; // no clue, punt
3413 }
3414
3415 if (ThreadPriorityVerbose) {
3416 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
3417 }
3418
3419 priocntl_enable = true; // Enable changing priorities
3420 return 0;
3421 }
3422
3423 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3424 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3425 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3426 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3427
3428
3429 // scale_to_lwp_priority
3430 //
3431 // Convert from the libthread "thr_setprio" scale to our current
3432 // lwp scheduling class scale.
3433 //
3434 static
3435 int scale_to_lwp_priority (int rMin, int rMax, int x)
3436 {
3437 int v;
3438
3439 if (x == 127) return rMax; // avoid round-down
3440 v = (((x*(rMax-rMin)))/128)+rMin;
3441 return v;
3442 }
3443
3444
3445 // set_lwp_class_and_priority
3446 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3447 int newPrio, int new_class, bool scale) {
3448 int rslt;
3449 int Actual, Expected, prv;
3450 pcparms_t ParmInfo; // for GET-SET
3451 #ifdef ASSERT
3452 pcparms_t ReadBack; // for readback
3453 #endif
3454
3455 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3456 // Query current values.
3457 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3458 // Cache "pcparms_t" in global ParmCache.
3459 // TODO: elide set-to-same-value
3460
3461 // If something went wrong on init, don't change priorities.
3462 if ( !priocntl_enable ) {
3463 if (ThreadPriorityVerbose)
3464 tty->print_cr("Trying to set priority but init failed, ignoring");
3465 return EINVAL;
3466 }
3467
3468 // If lwp hasn't started yet, just return
3469 // the _start routine will call us again.
3470 if ( lwpid <= 0 ) {
3471 if (ThreadPriorityVerbose) {
3472 tty->print_cr ("deferring the set_lwp_class_and_priority of thread "
3473 INTPTR_FORMAT " to %d, lwpid not set",
3474 ThreadID, newPrio);
3475 }
3476 return 0;
3477 }
3478
3479 if (ThreadPriorityVerbose) {
3480 tty->print_cr ("set_lwp_class_and_priority("
3481 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3482 ThreadID, lwpid, newPrio);
3483 }
3484
3485 memset(&ParmInfo, 0, sizeof(pcparms_t));
3486 ParmInfo.pc_cid = PC_CLNULL;
3487 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3488 if (rslt < 0) return errno;
3489
3490 int cur_class = ParmInfo.pc_cid;
3491 ParmInfo.pc_cid = (id_t)new_class;
3492
3493 if (new_class == rtLimits.schedPolicy) {
3494 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3495 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3496 rtLimits.maxPrio, newPrio)
3497 : newPrio;
3498 rtInfo->rt_tqsecs = RT_NOCHANGE;
3499 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3500 if (ThreadPriorityVerbose) {
3501 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3502 }
3503 } else if (new_class == iaLimits.schedPolicy) {
3504 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3505 int maxClamped = MIN2(iaLimits.maxPrio,
3506 cur_class == new_class
3507 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3508 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3509 maxClamped, newPrio)
3510 : newPrio;
3511 iaInfo->ia_uprilim = cur_class == new_class
3512 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3513 iaInfo->ia_mode = IA_NOCHANGE;
3514 if (ThreadPriorityVerbose) {
3515 tty->print_cr("IA: [%d...%d] %d->%d\n",
3516 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3517 }
3518 } else if (new_class == tsLimits.schedPolicy) {
3519 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3520 int maxClamped = MIN2(tsLimits.maxPrio,
3521 cur_class == new_class
3522 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3523 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3524 maxClamped, newPrio)
3525 : newPrio;
3526 tsInfo->ts_uprilim = cur_class == new_class
3527 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3528 if (ThreadPriorityVerbose) {
3529 tty->print_cr("TS: [%d...%d] %d->%d\n",
3530 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3531 }
3532 } else if (new_class == fxLimits.schedPolicy) {
3533 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3534 int maxClamped = MIN2(fxLimits.maxPrio,
3535 cur_class == new_class
3536 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3537 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3538 maxClamped, newPrio)
3539 : newPrio;
3540 fxInfo->fx_uprilim = cur_class == new_class
3541 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
3542 fxInfo->fx_tqsecs = FX_NOCHANGE;
3543 fxInfo->fx_tqnsecs = FX_NOCHANGE;
3544 if (ThreadPriorityVerbose) {
3545 tty->print_cr("FX: [%d...%d] %d->%d\n",
3546 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
3547 }
3548 } else {
3549 if (ThreadPriorityVerbose) {
3550 tty->print_cr("Unknown new scheduling class %d\n", new_class);
3551 }
3552 return EINVAL; // no clue, punt
3553 }
3554
3555 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3556 if (ThreadPriorityVerbose && rslt) {
3557 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3558 }
3559 if (rslt < 0) return errno;
3560
3561 #ifdef ASSERT
3562 // Sanity check: read back what we just attempted to set.
3563 // In theory it could have changed in the interim ...
3564 //
3565 // The priocntl system call is tricky.
3566 // Sometimes it'll validate the priority value argument and
3567 // return EINVAL if unhappy. At other times it fails silently.
3568 // Readbacks are prudent.
3569
3570 if (!ReadBackValidate) return 0;
3571
3572 memset(&ReadBack, 0, sizeof(pcparms_t));
3573 ReadBack.pc_cid = PC_CLNULL;
3574 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3575 assert(rslt >= 0, "priocntl failed");
3576 Actual = Expected = 0xBAD;
3577 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3578 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3579 Actual = RTPRI(ReadBack)->rt_pri;
3580 Expected = RTPRI(ParmInfo)->rt_pri;
3581 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3582 Actual = IAPRI(ReadBack)->ia_upri;
3583 Expected = IAPRI(ParmInfo)->ia_upri;
3584 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3585 Actual = TSPRI(ReadBack)->ts_upri;
3586 Expected = TSPRI(ParmInfo)->ts_upri;
3587 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3588 Actual = FXPRI(ReadBack)->fx_upri;
3589 Expected = FXPRI(ParmInfo)->fx_upri;
3590 } else {
3591 if (ThreadPriorityVerbose) {
3592 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
3593 ParmInfo.pc_cid);
3594 }
3595 }
3596
3597 if (Actual != Expected) {
3598 if (ThreadPriorityVerbose) {
3599 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3600 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3601 }
3602 }
3603 #endif
3604
3605 return 0;
3606 }
3607
3608 // Solaris only gives access to 128 real priorities at a time,
3609 // so we expand Java's ten to fill this range. This would be better
3610 // if we dynamically adjusted relative priorities.
3611 //
3612 // The ThreadPriorityPolicy option allows us to select 2 different
3613 // priority scales.
3614 //
3615 // ThreadPriorityPolicy=0
3616 // Since the Solaris' default priority is MaximumPriority, we do not
3617 // set a priority lower than Max unless a priority lower than
3618 // NormPriority is requested.
3619 //
3620 // ThreadPriorityPolicy=1
3621 // This mode causes the priority table to get filled with
3622 // linear values. NormPriority get's mapped to 50% of the
3623 // Maximum priority an so on. This will cause VM threads
3624 // to get unfair treatment against other Solaris processes
3625 // which do not explicitly alter their thread priorities.
3626 //
3627
3628 int os::java_to_os_priority[CriticalPriority + 1] = {
3629 -99999, // 0 Entry should never be used
3630
3631 0, // 1 MinPriority
3632 32, // 2
3633 64, // 3
3634
3635 96, // 4
3636 127, // 5 NormPriority
3637 127, // 6
3638
3639 127, // 7
3640 127, // 8
3641 127, // 9 NearMaxPriority
3642
3643 127, // 10 MaxPriority
3644
3645 -criticalPrio // 11 CriticalPriority
3646 };
3647
3648 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3649 OSThread* osthread = thread->osthread();
3650
3651 // Save requested priority in case the thread hasn't been started
3652 osthread->set_native_priority(newpri);
3653
3654 // Check for critical priority request
3655 bool fxcritical = false;
3656 if (newpri == -criticalPrio) {
3657 fxcritical = true;
3658 newpri = criticalPrio;
3659 }
3660
3661 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3662 if (!UseThreadPriorities) return OS_OK;
3663
3664 int status = 0;
3665
3666 if (!fxcritical) {
3667 // Use thr_setprio only if we have a priority that thr_setprio understands
3668 status = thr_setprio(thread->osthread()->thread_id(), newpri);
3669 }
3670
3671 int lwp_status =
3672 set_lwp_class_and_priority(osthread->thread_id(),
3673 osthread->lwp_id(),
3674 newpri,
3675 fxcritical ? fxLimits.schedPolicy : myClass,
3676 !fxcritical);
3677 if (lwp_status != 0 && fxcritical) {
3678 // Try again, this time without changing the scheduling class
3679 newpri = java_MaxPriority_to_os_priority;
3680 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
3681 osthread->lwp_id(),
3682 newpri, myClass, false);
3683 }
3684 status |= lwp_status;
3685 return (status == 0) ? OS_OK : OS_ERR;
3686 }
3687
3688
3689 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
3690 int p;
3691 if ( !UseThreadPriorities ) {
3692 *priority_ptr = NormalPriority;
3693 return OS_OK;
3694 }
3695 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3696 if (status != 0) {
3697 return OS_ERR;
3698 }
3699 *priority_ptr = p;
3700 return OS_OK;
3701 }
3702
3703
3704 // Hint to the underlying OS that a task switch would not be good.
3705 // Void return because it's a hint and can fail.
3706 void os::hint_no_preempt() {
3707 schedctl_start(schedctl_init());
3708 }
3709
3710 static void resume_clear_context(OSThread *osthread) {
3711 osthread->set_ucontext(NULL);
3712 }
3713
3714 static void suspend_save_context(OSThread *osthread, ucontext_t* context) {
3715 osthread->set_ucontext(context);
3716 }
3717
3718 static Semaphore sr_semaphore;
3719
3720 void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) {
3721 // Save and restore errno to avoid confusing native code with EINTR
3722 // after sigsuspend.
3723 int old_errno = errno;
3724
3725 OSThread* osthread = thread->osthread();
3726 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
3727
3728 os::SuspendResume::State current = osthread->sr.state();
3729 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
3730 suspend_save_context(osthread, uc);
3731
3732 // attempt to switch the state, we assume we had a SUSPEND_REQUEST
3733 os::SuspendResume::State state = osthread->sr.suspended();
3734 if (state == os::SuspendResume::SR_SUSPENDED) {
3735 sigset_t suspend_set; // signals for sigsuspend()
3736
3737 // get current set of blocked signals and unblock resume signal
3738 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set);
3739 sigdelset(&suspend_set, os::Solaris::SIGasync());
3740
3741 sr_semaphore.signal();
3742 // wait here until we are resumed
3743 while (1) {
3744 sigsuspend(&suspend_set);
3745
3746 os::SuspendResume::State result = osthread->sr.running();
3747 if (result == os::SuspendResume::SR_RUNNING) {
3748 sr_semaphore.signal();
3749 break;
3750 }
3751 }
3752
3753 } else if (state == os::SuspendResume::SR_RUNNING) {
3754 // request was cancelled, continue
3755 } else {
3756 ShouldNotReachHere();
3757 }
3758
3759 resume_clear_context(osthread);
3760 } else if (current == os::SuspendResume::SR_RUNNING) {
3761 // request was cancelled, continue
3762 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
3763 // ignore
3764 } else {
3765 // ignore
3766 }
3767
3768 errno = old_errno;
3769 }
3770
3771 void os::print_statistics() {
3772 }
3773
3774 int os::message_box(const char* title, const char* message) {
3775 int i;
3776 fdStream err(defaultStream::error_fd());
3777 for (i = 0; i < 78; i++) err.print_raw("=");
3778 err.cr();
3779 err.print_raw_cr(title);
3780 for (i = 0; i < 78; i++) err.print_raw("-");
3781 err.cr();
3782 err.print_raw_cr(message);
3783 for (i = 0; i < 78; i++) err.print_raw("=");
3784 err.cr();
3785
3786 char buf[16];
3787 // Prevent process from exiting upon "read error" without consuming all CPU
3788 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3789
3790 return buf[0] == 'y' || buf[0] == 'Y';
3791 }
3792
3793 static int sr_notify(OSThread* osthread) {
3794 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync());
3795 assert_status(status == 0, status, "thr_kill");
3796 return status;
3797 }
3798
3799 // "Randomly" selected value for how long we want to spin
3800 // before bailing out on suspending a thread, also how often
3801 // we send a signal to a thread we want to resume
3802 static const int RANDOMLY_LARGE_INTEGER = 1000000;
3803 static const int RANDOMLY_LARGE_INTEGER2 = 100;
3804
3805 static bool do_suspend(OSThread* osthread) {
3806 assert(osthread->sr.is_running(), "thread should be running");
3807 assert(!sr_semaphore.trywait(), "semaphore has invalid state");
3808
3809 // mark as suspended and send signal
3810 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
3811 // failed to switch, state wasn't running?
3812 ShouldNotReachHere();
3813 return false;
3814 }
3815
3816 if (sr_notify(osthread) != 0) {
3817 ShouldNotReachHere();
3818 }
3819
3820 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
3821 while (true) {
3822 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) {
3823 break;
3824 } else {
3825 // timeout
3826 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
3827 if (cancelled == os::SuspendResume::SR_RUNNING) {
3828 return false;
3829 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
3830 // make sure that we consume the signal on the semaphore as well
3831 sr_semaphore.wait();
3832 break;
3833 } else {
3834 ShouldNotReachHere();
3835 return false;
3836 }
3837 }
3838 }
3839
3840 guarantee(osthread->sr.is_suspended(), "Must be suspended");
3841 return true;
3842 }
3843
3844 static void do_resume(OSThread* osthread) {
3845 assert(osthread->sr.is_suspended(), "thread should be suspended");
3846 assert(!sr_semaphore.trywait(), "invalid semaphore state");
3847
3848 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
3849 // failed to switch to WAKEUP_REQUEST
3850 ShouldNotReachHere();
3851 return;
3852 }
3853
3854 while (true) {
3855 if (sr_notify(osthread) == 0) {
3856 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) {
3857 if (osthread->sr.is_running()) {
3858 return;
3859 }
3860 }
3861 } else {
3862 ShouldNotReachHere();
3863 }
3864 }
3865
3866 guarantee(osthread->sr.is_running(), "Must be running!");
3867 }
3868
3869 void os::SuspendedThreadTask::internal_do_task() {
3870 if (do_suspend(_thread->osthread())) {
3871 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
3872 do_task(context);
3873 do_resume(_thread->osthread());
3874 }
3875 }
3876
3877 class PcFetcher : public os::SuspendedThreadTask {
3878 public:
3879 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {}
3880 ExtendedPC result();
3881 protected:
3882 void do_task(const os::SuspendedThreadTaskContext& context);
3883 private:
3884 ExtendedPC _epc;
3885 };
3886
3887 ExtendedPC PcFetcher::result() {
3888 guarantee(is_done(), "task is not done yet.");
3889 return _epc;
3890 }
3891
3892 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) {
3893 Thread* thread = context.thread();
3894 OSThread* osthread = thread->osthread();
3895 if (osthread->ucontext() != NULL) {
3896 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext());
3897 } else {
3898 // NULL context is unexpected, double-check this is the VMThread
3899 guarantee(thread->is_VM_thread(), "can only be called for VMThread");
3900 }
3901 }
3902
3903 // A lightweight implementation that does not suspend the target thread and
3904 // thus returns only a hint. Used for profiling only!
3905 ExtendedPC os::get_thread_pc(Thread* thread) {
3906 // Make sure that it is called by the watcher and the Threads lock is owned.
3907 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
3908 // For now, is only used to profile the VM Thread
3909 assert(thread->is_VM_thread(), "Can only be called for VMThread");
3910 PcFetcher fetcher(thread);
3911 fetcher.run();
3912 return fetcher.result();
3913 }
3914
3915
3916 // This does not do anything on Solaris. This is basically a hook for being
3917 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
3918 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
3919 f(value, method, args, thread);
3920 }
3921
3922 // This routine may be used by user applications as a "hook" to catch signals.
3923 // The user-defined signal handler must pass unrecognized signals to this
3924 // routine, and if it returns true (non-zero), then the signal handler must
3925 // return immediately. If the flag "abort_if_unrecognized" is true, then this
3926 // routine will never retun false (zero), but instead will execute a VM panic
3927 // routine kill the process.
3928 //
3929 // If this routine returns false, it is OK to call it again. This allows
3930 // the user-defined signal handler to perform checks either before or after
3931 // the VM performs its own checks. Naturally, the user code would be making
3932 // a serious error if it tried to handle an exception (such as a null check
3933 // or breakpoint) that the VM was generating for its own correct operation.
3934 //
3935 // This routine may recognize any of the following kinds of signals:
3936 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
3937 // os::Solaris::SIGasync
3938 // It should be consulted by handlers for any of those signals.
3939 // It explicitly does not recognize os::Solaris::SIGinterrupt
3940 //
3941 // The caller of this routine must pass in the three arguments supplied
3942 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
3943 // field of the structure passed to sigaction(). This routine assumes that
3944 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
3945 //
3946 // Note that the VM will print warnings if it detects conflicting signal
3947 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
3948 //
3949 extern "C" JNIEXPORT int
3950 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext,
3951 int abort_if_unrecognized);
3952
3953
3954 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
3955 int orig_errno = errno; // Preserve errno value over signal handler.
3956 JVM_handle_solaris_signal(sig, info, ucVoid, true);
3957 errno = orig_errno;
3958 }
3959
3960 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
3961 is needed to provoke threads blocked on IO to return an EINTR
3962 Note: this explicitly does NOT call JVM_handle_solaris_signal and
3963 does NOT participate in signal chaining due to requirement for
3964 NOT setting SA_RESTART to make EINTR work. */
3965 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
3966 if (UseSignalChaining) {
3967 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
3968 if (actp && actp->sa_handler) {
3969 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
3970 }
3971 }
3972 }
3973
3974 // This boolean allows users to forward their own non-matching signals
3975 // to JVM_handle_solaris_signal, harmlessly.
3976 bool os::Solaris::signal_handlers_are_installed = false;
3977
3978 // For signal-chaining
3979 bool os::Solaris::libjsig_is_loaded = false;
3980 typedef struct sigaction *(*get_signal_t)(int);
3981 get_signal_t os::Solaris::get_signal_action = NULL;
3982
3983 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
3984 struct sigaction *actp = NULL;
3985
3986 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
3987 // Retrieve the old signal handler from libjsig
3988 actp = (*get_signal_action)(sig);
3989 }
3990 if (actp == NULL) {
3991 // Retrieve the preinstalled signal handler from jvm
3992 actp = get_preinstalled_handler(sig);
3993 }
3994
3995 return actp;
3996 }
3997
3998 static bool call_chained_handler(struct sigaction *actp, int sig,
3999 siginfo_t *siginfo, void *context) {
4000 // Call the old signal handler
4001 if (actp->sa_handler == SIG_DFL) {
4002 // It's more reasonable to let jvm treat it as an unexpected exception
4003 // instead of taking the default action.
4004 return false;
4005 } else if (actp->sa_handler != SIG_IGN) {
4006 if ((actp->sa_flags & SA_NODEFER) == 0) {
4007 // automaticlly block the signal
4008 sigaddset(&(actp->sa_mask), sig);
4009 }
4010
4011 sa_handler_t hand;
4012 sa_sigaction_t sa;
4013 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4014 // retrieve the chained handler
4015 if (siginfo_flag_set) {
4016 sa = actp->sa_sigaction;
4017 } else {
4018 hand = actp->sa_handler;
4019 }
4020
4021 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4022 actp->sa_handler = SIG_DFL;
4023 }
4024
4025 // try to honor the signal mask
4026 sigset_t oset;
4027 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4028
4029 // call into the chained handler
4030 if (siginfo_flag_set) {
4031 (*sa)(sig, siginfo, context);
4032 } else {
4033 (*hand)(sig);
4034 }
4035
4036 // restore the signal mask
4037 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4038 }
4039 // Tell jvm's signal handler the signal is taken care of.
4040 return true;
4041 }
4042
4043 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4044 bool chained = false;
4045 // signal-chaining
4046 if (UseSignalChaining) {
4047 struct sigaction *actp = get_chained_signal_action(sig);
4048 if (actp != NULL) {
4049 chained = call_chained_handler(actp, sig, siginfo, context);
4050 }
4051 }
4052 return chained;
4053 }
4054
4055 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4056 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4057 if (preinstalled_sigs[sig] != 0) {
4058 return &chainedsigactions[sig];
4059 }
4060 return NULL;
4061 }
4062
4063 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
4064
4065 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4066 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4067 chainedsigactions[sig] = oldAct;
4068 preinstalled_sigs[sig] = 1;
4069 }
4070
4071 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
4072 // Check for overwrite.
4073 struct sigaction oldAct;
4074 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4075 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4076 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4077 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4078 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4079 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4080 if (AllowUserSignalHandlers || !set_installed) {
4081 // Do not overwrite; user takes responsibility to forward to us.
4082 return;
4083 } else if (UseSignalChaining) {
4084 if (oktochain) {
4085 // save the old handler in jvm
4086 save_preinstalled_handler(sig, oldAct);
4087 } else {
4088 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4089 }
4090 // libjsig also interposes the sigaction() call below and saves the
4091 // old sigaction on it own.
4092 } else {
4093 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4094 "%#lx for signal %d.", (long)oldhand, sig));
4095 }
4096 }
4097
4098 struct sigaction sigAct;
4099 sigfillset(&(sigAct.sa_mask));
4100 sigAct.sa_handler = SIG_DFL;
4101
4102 sigAct.sa_sigaction = signalHandler;
4103 // Handle SIGSEGV on alternate signal stack if
4104 // not using stack banging
4105 if (!UseStackBanging && sig == SIGSEGV) {
4106 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4107 // Interruptible i/o requires SA_RESTART cleared so EINTR
4108 // is returned instead of restarting system calls
4109 } else if (sig == os::Solaris::SIGinterrupt()) {
4110 sigemptyset(&sigAct.sa_mask);
4111 sigAct.sa_handler = NULL;
4112 sigAct.sa_flags = SA_SIGINFO;
4113 sigAct.sa_sigaction = sigINTRHandler;
4114 } else {
4115 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4116 }
4117 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4118
4119 sigaction(sig, &sigAct, &oldAct);
4120
4121 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4122 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4123 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4124 }
4125
4126
4127 #define DO_SIGNAL_CHECK(sig) \
4128 if (!sigismember(&check_signal_done, sig)) \
4129 os::Solaris::check_signal_handler(sig)
4130
4131 // This method is a periodic task to check for misbehaving JNI applications
4132 // under CheckJNI, we can add any periodic checks here
4133
4134 void os::run_periodic_checks() {
4135 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4136 // thereby preventing a NULL checks.
4137 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
4138
4139 if (check_signals == false) return;
4140
4141 // SEGV and BUS if overridden could potentially prevent
4142 // generation of hs*.log in the event of a crash, debugging
4143 // such a case can be very challenging, so we absolutely
4144 // check for the following for a good measure:
4145 DO_SIGNAL_CHECK(SIGSEGV);
4146 DO_SIGNAL_CHECK(SIGILL);
4147 DO_SIGNAL_CHECK(SIGFPE);
4148 DO_SIGNAL_CHECK(SIGBUS);
4149 DO_SIGNAL_CHECK(SIGPIPE);
4150 DO_SIGNAL_CHECK(SIGXFSZ);
4151
4152 // ReduceSignalUsage allows the user to override these handlers
4153 // see comments at the very top and jvm_solaris.h
4154 if (!ReduceSignalUsage) {
4155 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4156 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4157 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4158 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4159 }
4160
4161 // See comments above for using JVM1/JVM2 and UseAltSigs
4162 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4163 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4164
4165 }
4166
4167 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4168
4169 static os_sigaction_t os_sigaction = NULL;
4170
4171 void os::Solaris::check_signal_handler(int sig) {
4172 char buf[O_BUFLEN];
4173 address jvmHandler = NULL;
4174
4175 struct sigaction act;
4176 if (os_sigaction == NULL) {
4177 // only trust the default sigaction, in case it has been interposed
4178 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4179 if (os_sigaction == NULL) return;
4180 }
4181
4182 os_sigaction(sig, (struct sigaction*)NULL, &act);
4183
4184 address thisHandler = (act.sa_flags & SA_SIGINFO)
4185 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4186 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
4187
4188
4189 switch(sig) {
4190 case SIGSEGV:
4191 case SIGBUS:
4192 case SIGFPE:
4193 case SIGPIPE:
4194 case SIGXFSZ:
4195 case SIGILL:
4196 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4197 break;
4198
4199 case SHUTDOWN1_SIGNAL:
4200 case SHUTDOWN2_SIGNAL:
4201 case SHUTDOWN3_SIGNAL:
4202 case BREAK_SIGNAL:
4203 jvmHandler = (address)user_handler();
4204 break;
4205
4206 default:
4207 int intrsig = os::Solaris::SIGinterrupt();
4208 int asynsig = os::Solaris::SIGasync();
4209
4210 if (sig == intrsig) {
4211 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4212 } else if (sig == asynsig) {
4213 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4214 } else {
4215 return;
4216 }
4217 break;
4218 }
4219
4220
4221 if (thisHandler != jvmHandler) {
4222 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4223 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4224 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4225 // No need to check this sig any longer
4226 sigaddset(&check_signal_done, sig);
4227 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN
4228 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) {
4229 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell",
4230 exception_name(sig, buf, O_BUFLEN));
4231 }
4232 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4233 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4234 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4235 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4236 // No need to check this sig any longer
4237 sigaddset(&check_signal_done, sig);
4238 }
4239
4240 // Print all the signal handler state
4241 if (sigismember(&check_signal_done, sig)) {
4242 print_signal_handlers(tty, buf, O_BUFLEN);
4243 }
4244
4245 }
4246
4247 void os::Solaris::install_signal_handlers() {
4248 bool libjsigdone = false;
4249 signal_handlers_are_installed = true;
4250
4251 // signal-chaining
4252 typedef void (*signal_setting_t)();
4253 signal_setting_t begin_signal_setting = NULL;
4254 signal_setting_t end_signal_setting = NULL;
4255 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4256 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4257 if (begin_signal_setting != NULL) {
4258 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4259 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4260 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4261 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4262 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4263 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4264 libjsig_is_loaded = true;
4265 if (os::Solaris::get_libjsig_version != NULL) {
4266 libjsigversion = (*os::Solaris::get_libjsig_version)();
4267 }
4268 assert(UseSignalChaining, "should enable signal-chaining");
4269 }
4270 if (libjsig_is_loaded) {
4271 // Tell libjsig jvm is setting signal handlers
4272 (*begin_signal_setting)();
4273 }
4274
4275 set_signal_handler(SIGSEGV, true, true);
4276 set_signal_handler(SIGPIPE, true, true);
4277 set_signal_handler(SIGXFSZ, true, true);
4278 set_signal_handler(SIGBUS, true, true);
4279 set_signal_handler(SIGILL, true, true);
4280 set_signal_handler(SIGFPE, true, true);
4281
4282
4283 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4284
4285 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4286 // can not register overridable signals which might be > 32
4287 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4288 // Tell libjsig jvm has finished setting signal handlers
4289 (*end_signal_setting)();
4290 libjsigdone = true;
4291 }
4292 }
4293
4294 // Never ok to chain our SIGinterrupt
4295 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4296 set_signal_handler(os::Solaris::SIGasync(), true, true);
4297
4298 if (libjsig_is_loaded && !libjsigdone) {
4299 // Tell libjsig jvm finishes setting signal handlers
4300 (*end_signal_setting)();
4301 }
4302
4303 // We don't activate signal checker if libjsig is in place, we trust ourselves
4304 // and if UserSignalHandler is installed all bets are off.
4305 // Log that signal checking is off only if -verbose:jni is specified.
4306 if (CheckJNICalls) {
4307 if (libjsig_is_loaded) {
4308 if (PrintJNIResolving) {
4309 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4310 }
4311 check_signals = false;
4312 }
4313 if (AllowUserSignalHandlers) {
4314 if (PrintJNIResolving) {
4315 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4316 }
4317 check_signals = false;
4318 }
4319 }
4320 }
4321
4322
4323 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
4324
4325 const char * signames[] = {
4326 "SIG0",
4327 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4328 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4329 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4330 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4331 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4332 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4333 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4334 "SIGCANCEL", "SIGLOST"
4335 };
4336
4337 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4338 if (0 < exception_code && exception_code <= SIGRTMAX) {
4339 // signal
4340 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4341 jio_snprintf(buf, size, "%s", signames[exception_code]);
4342 } else {
4343 jio_snprintf(buf, size, "SIG%d", exception_code);
4344 }
4345 return buf;
4346 } else {
4347 return NULL;
4348 }
4349 }
4350
4351 // (Static) wrapper for getisax(2) call.
4352 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4353
4354 // (Static) wrappers for the liblgrp API
4355 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4356 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4357 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4358 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4359 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4360 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4361 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4362 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4363 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4364
4365 // (Static) wrapper for meminfo() call.
4366 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4367
4368 static address resolve_symbol_lazy(const char* name) {
4369 address addr = (address) dlsym(RTLD_DEFAULT, name);
4370 if(addr == NULL) {
4371 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4372 addr = (address) dlsym(RTLD_NEXT, name);
4373 }
4374 return addr;
4375 }
4376
4377 static address resolve_symbol(const char* name) {
4378 address addr = resolve_symbol_lazy(name);
4379 if(addr == NULL) {
4380 fatal(dlerror());
4381 }
4382 return addr;
4383 }
4384
4385 void os::Solaris::libthread_init() {
4386 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4387
4388 lwp_priocntl_init();
4389
4390 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4391 if(func == NULL) {
4392 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4393 // Guarantee that this VM is running on an new enough OS (5.6 or
4394 // later) that it will have a new enough libthread.so.
4395 guarantee(func != NULL, "libthread.so is too old.");
4396 }
4397
4398 int size;
4399 void (*handler_info_func)(address *, int *);
4400 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4401 handler_info_func(&handler_start, &size);
4402 handler_end = handler_start + size;
4403 }
4404
4405
4406 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4407 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4408 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4409 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4410 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4411 int os::Solaris::_mutex_scope = USYNC_THREAD;
4412
4413 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4414 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4415 int_fnP_cond_tP os::Solaris::_cond_signal;
4416 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4417 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4418 int_fnP_cond_tP os::Solaris::_cond_destroy;
4419 int os::Solaris::_cond_scope = USYNC_THREAD;
4420
4421 void os::Solaris::synchronization_init() {
4422 if(UseLWPSynchronization) {
4423 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4424 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4425 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4426 os::Solaris::set_mutex_init(lwp_mutex_init);
4427 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4428 os::Solaris::set_mutex_scope(USYNC_THREAD);
4429
4430 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4431 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4432 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4433 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4434 os::Solaris::set_cond_init(lwp_cond_init);
4435 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4436 os::Solaris::set_cond_scope(USYNC_THREAD);
4437 }
4438 else {
4439 os::Solaris::set_mutex_scope(USYNC_THREAD);
4440 os::Solaris::set_cond_scope(USYNC_THREAD);
4441
4442 if(UsePthreads) {
4443 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4444 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4445 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4446 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4447 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4448
4449 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4450 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4451 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4452 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4453 os::Solaris::set_cond_init(pthread_cond_default_init);
4454 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4455 }
4456 else {
4457 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4458 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4459 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4460 os::Solaris::set_mutex_init(::mutex_init);
4461 os::Solaris::set_mutex_destroy(::mutex_destroy);
4462
4463 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4464 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4465 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4466 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4467 os::Solaris::set_cond_init(::cond_init);
4468 os::Solaris::set_cond_destroy(::cond_destroy);
4469 }
4470 }
4471 }
4472
4473 bool os::Solaris::liblgrp_init() {
4474 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4475 if (handle != NULL) {
4476 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4477 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4478 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4479 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4480 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4481 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4482 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4483 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4484 dlsym(handle, "lgrp_cookie_stale")));
4485
4486 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4487 set_lgrp_cookie(c);
4488 return true;
4489 }
4490 return false;
4491 }
4492
4493 void os::Solaris::misc_sym_init() {
4494 address func;
4495
4496 // getisax
4497 func = resolve_symbol_lazy("getisax");
4498 if (func != NULL) {
4499 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4500 }
4501
4502 // meminfo
4503 func = resolve_symbol_lazy("meminfo");
4504 if (func != NULL) {
4505 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4506 }
4507 }
4508
4509 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4510 assert(_getisax != NULL, "_getisax not set");
4511 return _getisax(array, n);
4512 }
4513
4514 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4515 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4516 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4517
4518 void init_pset_getloadavg_ptr(void) {
4519 pset_getloadavg_ptr =
4520 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4521 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4522 warning("pset_getloadavg function not found");
4523 }
4524 }
4525
4526 int os::Solaris::_dev_zero_fd = -1;
4527
4528 // this is called _before_ the global arguments have been parsed
4529 void os::init(void) {
4530 _initial_pid = getpid();
4531
4532 max_hrtime = first_hrtime = gethrtime();
4533
4534 init_random(1234567);
4535
4536 page_size = sysconf(_SC_PAGESIZE);
4537 if (page_size == -1)
4538 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4539 strerror(errno)));
4540 init_page_sizes((size_t) page_size);
4541
4542 Solaris::initialize_system_info();
4543
4544 // Initialize misc. symbols as soon as possible, so we can use them
4545 // if we need them.
4546 Solaris::misc_sym_init();
4547
4548 int fd = ::open("/dev/zero", O_RDWR);
4549 if (fd < 0) {
4550 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
4551 } else {
4552 Solaris::set_dev_zero_fd(fd);
4553
4554 // Close on exec, child won't inherit.
4555 fcntl(fd, F_SETFD, FD_CLOEXEC);
4556 }
4557
4558 clock_tics_per_sec = CLK_TCK;
4559
4560 // check if dladdr1() exists; dladdr1 can provide more information than
4561 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4562 // and is available on linker patches for 5.7 and 5.8.
4563 // libdl.so must have been loaded, this call is just an entry lookup
4564 void * hdl = dlopen("libdl.so", RTLD_NOW);
4565 if (hdl)
4566 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4567
4568 // (Solaris only) this switches to calls that actually do locking.
4569 ThreadCritical::initialize();
4570
4571 main_thread = thr_self();
4572
4573 // Constant minimum stack size allowed. It must be at least
4574 // the minimum of what the OS supports (thr_min_stack()), and
4575 // enough to allow the thread to get to user bytecode execution.
4576 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4577 // If the pagesize of the VM is greater than 8K determine the appropriate
4578 // number of initial guard pages. The user can change this with the
4579 // command line arguments, if needed.
4580 if (vm_page_size() > 8*K) {
4581 StackYellowPages = 1;
4582 StackRedPages = 1;
4583 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4584 }
4585 }
4586
4587 // To install functions for atexit system call
4588 extern "C" {
4589 static void perfMemory_exit_helper() {
4590 perfMemory_exit();
4591 }
4592 }
4593
4594 // this is called _after_ the global arguments have been parsed
4595 jint os::init_2(void) {
4596 // try to enable extended file IO ASAP, see 6431278
4597 os::Solaris::try_enable_extended_io();
4598
4599 // Allocate a single page and mark it as readable for safepoint polling. Also
4600 // use this first mmap call to check support for MAP_ALIGN.
4601 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4602 page_size,
4603 MAP_PRIVATE | MAP_ALIGN,
4604 PROT_READ);
4605 if (polling_page == NULL) {
4606 has_map_align = false;
4607 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4608 PROT_READ);
4609 }
4610
4611 os::set_polling_page(polling_page);
4612
4613 #ifndef PRODUCT
4614 if( Verbose && PrintMiscellaneous )
4615 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
4616 #endif
4617
4618 if (!UseMembar) {
4619 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
4620 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
4621 os::set_memory_serialize_page( mem_serialize_page );
4622
4623 #ifndef PRODUCT
4624 if(Verbose && PrintMiscellaneous)
4625 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
4626 #endif
4627 }
4628
4629 // Check minimum allowable stack size for thread creation and to initialize
4630 // the java system classes, including StackOverflowError - depends on page
4631 // size. Add a page for compiler2 recursion in main thread.
4632 // Add in 2*BytesPerWord times page size to account for VM stack during
4633 // class initialization depending on 32 or 64 bit VM.
4634 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
4635 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
4636 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
4637
4638 size_t threadStackSizeInBytes = ThreadStackSize * K;
4639 if (threadStackSizeInBytes != 0 &&
4640 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
4641 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
4642 os::Solaris::min_stack_allowed/K);
4643 return JNI_ERR;
4644 }
4645
4646 // For 64kbps there will be a 64kb page size, which makes
4647 // the usable default stack size quite a bit less. Increase the
4648 // stack for 64kb (or any > than 8kb) pages, this increases
4649 // virtual memory fragmentation (since we're not creating the
4650 // stack on a power of 2 boundary. The real fix for this
4651 // should be to fix the guard page mechanism.
4652
4653 if (vm_page_size() > 8*K) {
4654 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
4655 ? threadStackSizeInBytes +
4656 ((StackYellowPages + StackRedPages) * vm_page_size())
4657 : 0;
4658 ThreadStackSize = threadStackSizeInBytes/K;
4659 }
4660
4661 // Make the stack size a multiple of the page size so that
4662 // the yellow/red zones can be guarded.
4663 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
4664 vm_page_size()));
4665
4666 Solaris::libthread_init();
4667
4668 if (UseNUMA) {
4669 if (!Solaris::liblgrp_init()) {
4670 UseNUMA = false;
4671 } else {
4672 size_t lgrp_limit = os::numa_get_groups_num();
4673 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
4674 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4675 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal);
4676 if (lgrp_num < 2) {
4677 // There's only one locality group, disable NUMA.
4678 UseNUMA = false;
4679 }
4680 }
4681 if (!UseNUMA && ForceNUMA) {
4682 UseNUMA = true;
4683 }
4684 }
4685
4686 Solaris::signal_sets_init();
4687 Solaris::init_signal_mem();
4688 Solaris::install_signal_handlers();
4689
4690 if (libjsigversion < JSIG_VERSION_1_4_1) {
4691 Maxlibjsigsigs = OLDMAXSIGNUM;
4692 }
4693
4694 // initialize synchronization primitives to use either thread or
4695 // lwp synchronization (controlled by UseLWPSynchronization)
4696 Solaris::synchronization_init();
4697
4698 if (MaxFDLimit) {
4699 // set the number of file descriptors to max. print out error
4700 // if getrlimit/setrlimit fails but continue regardless.
4701 struct rlimit nbr_files;
4702 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4703 if (status != 0) {
4704 if (PrintMiscellaneous && (Verbose || WizardMode))
4705 perror("os::init_2 getrlimit failed");
4706 } else {
4707 nbr_files.rlim_cur = nbr_files.rlim_max;
4708 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4709 if (status != 0) {
4710 if (PrintMiscellaneous && (Verbose || WizardMode))
4711 perror("os::init_2 setrlimit failed");
4712 }
4713 }
4714 }
4715
4716 // Calculate theoretical max. size of Threads to guard gainst
4717 // artifical out-of-memory situations, where all available address-
4718 // space has been reserved by thread stacks. Default stack size is 1Mb.
4719 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
4720 JavaThread::stack_size_at_create() : (1*K*K);
4721 assert(pre_thread_stack_size != 0, "Must have a stack");
4722 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
4723 // we should start doing Virtual Memory banging. Currently when the threads will
4724 // have used all but 200Mb of space.
4725 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
4726 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
4727
4728 // at-exit methods are called in the reverse order of their registration.
4729 // In Solaris 7 and earlier, atexit functions are called on return from
4730 // main or as a result of a call to exit(3C). There can be only 32 of
4731 // these functions registered and atexit() does not set errno. In Solaris
4732 // 8 and later, there is no limit to the number of functions registered
4733 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
4734 // functions are called upon dlclose(3DL) in addition to return from main
4735 // and exit(3C).
4736
4737 if (PerfAllowAtExitRegistration) {
4738 // only register atexit functions if PerfAllowAtExitRegistration is set.
4739 // atexit functions can be delayed until process exit time, which
4740 // can be problematic for embedded VM situations. Embedded VMs should
4741 // call DestroyJavaVM() to assure that VM resources are released.
4742
4743 // note: perfMemory_exit_helper atexit function may be removed in
4744 // the future if the appropriate cleanup code can be added to the
4745 // VM_Exit VMOperation's doit method.
4746 if (atexit(perfMemory_exit_helper) != 0) {
4747 warning("os::init2 atexit(perfMemory_exit_helper) failed");
4748 }
4749 }
4750
4751 // Init pset_loadavg function pointer
4752 init_pset_getloadavg_ptr();
4753
4754 return JNI_OK;
4755 }
4756
4757 void os::init_3(void) {
4758 return;
4759 }
4760
4761 // Mark the polling page as unreadable
4762 void os::make_polling_page_unreadable(void) {
4763 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
4764 fatal("Could not disable polling page");
4765 };
4766
4767 // Mark the polling page as readable
4768 void os::make_polling_page_readable(void) {
4769 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
4770 fatal("Could not enable polling page");
4771 };
4772
4773 // OS interface.
4774
4775 bool os::check_heap(bool force) { return true; }
4776
4777 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
4778 static vsnprintf_t sol_vsnprintf = NULL;
4779
4780 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
4781 if (!sol_vsnprintf) {
4782 //search for the named symbol in the objects that were loaded after libjvm
4783 void* where = RTLD_NEXT;
4784 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
4785 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
4786 if (!sol_vsnprintf){
4787 //search for the named symbol in the objects that were loaded before libjvm
4788 where = RTLD_DEFAULT;
4789 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
4790 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
4791 assert(sol_vsnprintf != NULL, "vsnprintf not found");
4792 }
4793 }
4794 return (*sol_vsnprintf)(buf, count, fmt, argptr);
4795 }
4796
4797
4798 // Is a (classpath) directory empty?
4799 bool os::dir_is_empty(const char* path) {
4800 DIR *dir = NULL;
4801 struct dirent *ptr;
4802
4803 dir = opendir(path);
4804 if (dir == NULL) return true;
4805
4806 /* Scan the directory */
4807 bool result = true;
4808 char buf[sizeof(struct dirent) + MAX_PATH];
4809 struct dirent *dbuf = (struct dirent *) buf;
4810 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
4811 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
4812 result = false;
4813 }
4814 }
4815 closedir(dir);
4816 return result;
4817 }
4818
4819 // This code originates from JDK's sysOpen and open64_w
4820 // from src/solaris/hpi/src/system_md.c
4821
4822 #ifndef O_DELETE
4823 #define O_DELETE 0x10000
4824 #endif
4825
4826 // Open a file. Unlink the file immediately after open returns
4827 // if the specified oflag has the O_DELETE flag set.
4828 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
4829
4830 int os::open(const char *path, int oflag, int mode) {
4831 if (strlen(path) > MAX_PATH - 1) {
4832 errno = ENAMETOOLONG;
4833 return -1;
4834 }
4835 int fd;
4836 int o_delete = (oflag & O_DELETE);
4837 oflag = oflag & ~O_DELETE;
4838
4839 fd = ::open64(path, oflag, mode);
4840 if (fd == -1) return -1;
4841
4842 //If the open succeeded, the file might still be a directory
4843 {
4844 struct stat64 buf64;
4845 int ret = ::fstat64(fd, &buf64);
4846 int st_mode = buf64.st_mode;
4847
4848 if (ret != -1) {
4849 if ((st_mode & S_IFMT) == S_IFDIR) {
4850 errno = EISDIR;
4851 ::close(fd);
4852 return -1;
4853 }
4854 } else {
4855 ::close(fd);
4856 return -1;
4857 }
4858 }
4859 /*
4860 * 32-bit Solaris systems suffer from:
4861 *
4862 * - an historical default soft limit of 256 per-process file
4863 * descriptors that is too low for many Java programs.
4864 *
4865 * - a design flaw where file descriptors created using stdio
4866 * fopen must be less than 256, _even_ when the first limit above
4867 * has been raised. This can cause calls to fopen (but not calls to
4868 * open, for example) to fail mysteriously, perhaps in 3rd party
4869 * native code (although the JDK itself uses fopen). One can hardly
4870 * criticize them for using this most standard of all functions.
4871 *
4872 * We attempt to make everything work anyways by:
4873 *
4874 * - raising the soft limit on per-process file descriptors beyond
4875 * 256
4876 *
4877 * - As of Solaris 10u4, we can request that Solaris raise the 256
4878 * stdio fopen limit by calling function enable_extended_FILE_stdio.
4879 * This is done in init_2 and recorded in enabled_extended_FILE_stdio
4880 *
4881 * - If we are stuck on an old (pre 10u4) Solaris system, we can
4882 * workaround the bug by remapping non-stdio file descriptors below
4883 * 256 to ones beyond 256, which is done below.
4884 *
4885 * See:
4886 * 1085341: 32-bit stdio routines should support file descriptors >255
4887 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files
4888 * 6431278: Netbeans crash on 32 bit Solaris: need to call
4889 * enable_extended_FILE_stdio() in VM initialisation
4890 * Giri Mandalika's blog
4891 * http://technopark02.blogspot.com/2005_05_01_archive.html
4892 */
4893 #ifndef _LP64
4894 if ((!enabled_extended_FILE_stdio) && fd < 256) {
4895 int newfd = ::fcntl(fd, F_DUPFD, 256);
4896 if (newfd != -1) {
4897 ::close(fd);
4898 fd = newfd;
4899 }
4900 }
4901 #endif // 32-bit Solaris
4902 /*
4903 * All file descriptors that are opened in the JVM and not
4904 * specifically destined for a subprocess should have the
4905 * close-on-exec flag set. If we don't set it, then careless 3rd
4906 * party native code might fork and exec without closing all
4907 * appropriate file descriptors (e.g. as we do in closeDescriptors in
4908 * UNIXProcess.c), and this in turn might:
4909 *
4910 * - cause end-of-file to fail to be detected on some file
4911 * descriptors, resulting in mysterious hangs, or
4912 *
4913 * - might cause an fopen in the subprocess to fail on a system
4914 * suffering from bug 1085341.
4915 *
4916 * (Yes, the default setting of the close-on-exec flag is a Unix
4917 * design flaw)
4918 *
4919 * See:
4920 * 1085341: 32-bit stdio routines should support file descriptors >255
4921 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
4922 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
4923 */
4924 #ifdef FD_CLOEXEC
4925 {
4926 int flags = ::fcntl(fd, F_GETFD);
4927 if (flags != -1)
4928 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
4929 }
4930 #endif
4931
4932 if (o_delete != 0) {
4933 ::unlink(path);
4934 }
4935 return fd;
4936 }
4937
4938 // create binary file, rewriting existing file if required
4939 int os::create_binary_file(const char* path, bool rewrite_existing) {
4940 int oflags = O_WRONLY | O_CREAT;
4941 if (!rewrite_existing) {
4942 oflags |= O_EXCL;
4943 }
4944 return ::open64(path, oflags, S_IREAD | S_IWRITE);
4945 }
4946
4947 // return current position of file pointer
4948 jlong os::current_file_offset(int fd) {
4949 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
4950 }
4951
4952 // move file pointer to the specified offset
4953 jlong os::seek_to_file_offset(int fd, jlong offset) {
4954 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
4955 }
4956
4957 jlong os::lseek(int fd, jlong offset, int whence) {
4958 return (jlong) ::lseek64(fd, offset, whence);
4959 }
4960
4961 char * os::native_path(char *path) {
4962 return path;
4963 }
4964
4965 int os::ftruncate(int fd, jlong length) {
4966 return ::ftruncate64(fd, length);
4967 }
4968
4969 int os::fsync(int fd) {
4970 RESTARTABLE_RETURN_INT(::fsync(fd));
4971 }
4972
4973 int os::available(int fd, jlong *bytes) {
4974 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
4975 "Assumed _thread_in_native");
4976 jlong cur, end;
4977 int mode;
4978 struct stat64 buf64;
4979
4980 if (::fstat64(fd, &buf64) >= 0) {
4981 mode = buf64.st_mode;
4982 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
4983 int n,ioctl_return;
4984
4985 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return);
4986 if (ioctl_return>= 0) {
4987 *bytes = n;
4988 return 1;
4989 }
4990 }
4991 }
4992 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
4993 return 0;
4994 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
4995 return 0;
4996 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
4997 return 0;
4998 }
4999 *bytes = end - cur;
5000 return 1;
5001 }
5002
5003 // Map a block of memory.
5004 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
5005 char *addr, size_t bytes, bool read_only,
5006 bool allow_exec) {
5007 int prot;
5008 int flags;
5009
5010 if (read_only) {
5011 prot = PROT_READ;
5012 flags = MAP_SHARED;
5013 } else {
5014 prot = PROT_READ | PROT_WRITE;
5015 flags = MAP_PRIVATE;
5016 }
5017
5018 if (allow_exec) {
5019 prot |= PROT_EXEC;
5020 }
5021
5022 if (addr != NULL) {
5023 flags |= MAP_FIXED;
5024 }
5025
5026 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5027 fd, file_offset);
5028 if (mapped_address == MAP_FAILED) {
5029 return NULL;
5030 }
5031 return mapped_address;
5032 }
5033
5034
5035 // Remap a block of memory.
5036 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5037 char *addr, size_t bytes, bool read_only,
5038 bool allow_exec) {
5039 // same as map_memory() on this OS
5040 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5041 allow_exec);
5042 }
5043
5044
5045 // Unmap a block of memory.
5046 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5047 return munmap(addr, bytes) == 0;
5048 }
5049
5050 void os::pause() {
5051 char filename[MAX_PATH];
5052 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5053 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5054 } else {
5055 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5056 }
5057
5058 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5059 if (fd != -1) {
5060 struct stat buf;
5061 ::close(fd);
5062 while (::stat(filename, &buf) == 0) {
5063 (void)::poll(NULL, 0, 100);
5064 }
5065 } else {
5066 jio_fprintf(stderr,
5067 "Could not open pause file '%s', continuing immediately.\n", filename);
5068 }
5069 }
5070
5071 #ifndef PRODUCT
5072 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5073 // Turn this on if you need to trace synch operations.
5074 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5075 // and call record_synch_enable and record_synch_disable
5076 // around the computation of interest.
5077
5078 void record_synch(char* name, bool returning); // defined below
5079
5080 class RecordSynch {
5081 char* _name;
5082 public:
5083 RecordSynch(char* name) :_name(name)
5084 { record_synch(_name, false); }
5085 ~RecordSynch() { record_synch(_name, true); }
5086 };
5087
5088 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5089 extern "C" ret name params { \
5090 typedef ret name##_t params; \
5091 static name##_t* implem = NULL; \
5092 static int callcount = 0; \
5093 if (implem == NULL) { \
5094 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5095 if (implem == NULL) fatal(dlerror()); \
5096 } \
5097 ++callcount; \
5098 RecordSynch _rs(#name); \
5099 inner; \
5100 return implem args; \
5101 }
5102 // in dbx, examine callcounts this way:
5103 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5104
5105 #define CHECK_POINTER_OK(p) \
5106 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5107 #define CHECK_MU \
5108 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5109 #define CHECK_CV \
5110 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5111 #define CHECK_P(p) \
5112 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5113
5114 #define CHECK_MUTEX(mutex_op) \
5115 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5116
5117 CHECK_MUTEX( mutex_lock)
5118 CHECK_MUTEX( _mutex_lock)
5119 CHECK_MUTEX( mutex_unlock)
5120 CHECK_MUTEX(_mutex_unlock)
5121 CHECK_MUTEX( mutex_trylock)
5122 CHECK_MUTEX(_mutex_trylock)
5123
5124 #define CHECK_COND(cond_op) \
5125 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
5126
5127 CHECK_COND( cond_wait);
5128 CHECK_COND(_cond_wait);
5129 CHECK_COND(_cond_wait_cancel);
5130
5131 #define CHECK_COND2(cond_op) \
5132 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
5133
5134 CHECK_COND2( cond_timedwait);
5135 CHECK_COND2(_cond_timedwait);
5136 CHECK_COND2(_cond_timedwait_cancel);
5137
5138 // do the _lwp_* versions too
5139 #define mutex_t lwp_mutex_t
5140 #define cond_t lwp_cond_t
5141 CHECK_MUTEX( _lwp_mutex_lock)
5142 CHECK_MUTEX( _lwp_mutex_unlock)
5143 CHECK_MUTEX( _lwp_mutex_trylock)
5144 CHECK_MUTEX( __lwp_mutex_lock)
5145 CHECK_MUTEX( __lwp_mutex_unlock)
5146 CHECK_MUTEX( __lwp_mutex_trylock)
5147 CHECK_MUTEX(___lwp_mutex_lock)
5148 CHECK_MUTEX(___lwp_mutex_unlock)
5149
5150 CHECK_COND( _lwp_cond_wait);
5151 CHECK_COND( __lwp_cond_wait);
5152 CHECK_COND(___lwp_cond_wait);
5153
5154 CHECK_COND2( _lwp_cond_timedwait);
5155 CHECK_COND2( __lwp_cond_timedwait);
5156 #undef mutex_t
5157 #undef cond_t
5158
5159 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5160 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5161 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5162 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5163 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5164 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5165 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5166 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5167
5168
5169 // recording machinery:
5170
5171 enum { RECORD_SYNCH_LIMIT = 200 };
5172 char* record_synch_name[RECORD_SYNCH_LIMIT];
5173 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5174 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5175 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5176 int record_synch_count = 0;
5177 bool record_synch_enabled = false;
5178
5179 // in dbx, examine recorded data this way:
5180 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5181
5182 void record_synch(char* name, bool returning) {
5183 if (record_synch_enabled) {
5184 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5185 record_synch_name[record_synch_count] = name;
5186 record_synch_returning[record_synch_count] = returning;
5187 record_synch_thread[record_synch_count] = thr_self();
5188 record_synch_arg0ptr[record_synch_count] = &name;
5189 record_synch_count++;
5190 }
5191 // put more checking code here:
5192 // ...
5193 }
5194 }
5195
5196 void record_synch_enable() {
5197 // start collecting trace data, if not already doing so
5198 if (!record_synch_enabled) record_synch_count = 0;
5199 record_synch_enabled = true;
5200 }
5201
5202 void record_synch_disable() {
5203 // stop collecting trace data
5204 record_synch_enabled = false;
5205 }
5206
5207 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5208 #endif // PRODUCT
5209
5210 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5211 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5212 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5213
5214
5215 // JVMTI & JVM monitoring and management support
5216 // The thread_cpu_time() and current_thread_cpu_time() are only
5217 // supported if is_thread_cpu_time_supported() returns true.
5218 // They are not supported on Solaris T1.
5219
5220 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5221 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5222 // of a thread.
5223 //
5224 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5225 // returns the fast estimate available on the platform.
5226
5227 // hrtime_t gethrvtime() return value includes
5228 // user time but does not include system time
5229 jlong os::current_thread_cpu_time() {
5230 return (jlong) gethrvtime();
5231 }
5232
5233 jlong os::thread_cpu_time(Thread *thread) {
5234 // return user level CPU time only to be consistent with
5235 // what current_thread_cpu_time returns.
5236 // thread_cpu_time_info() must be changed if this changes
5237 return os::thread_cpu_time(thread, false /* user time only */);
5238 }
5239
5240 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5241 if (user_sys_cpu_time) {
5242 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5243 } else {
5244 return os::current_thread_cpu_time();
5245 }
5246 }
5247
5248 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5249 char proc_name[64];
5250 int count;
5251 prusage_t prusage;
5252 jlong lwp_time;
5253 int fd;
5254
5255 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5256 getpid(),
5257 thread->osthread()->lwp_id());
5258 fd = ::open(proc_name, O_RDONLY);
5259 if ( fd == -1 ) return -1;
5260
5261 do {
5262 count = ::pread(fd,
5263 (void *)&prusage.pr_utime,
5264 thr_time_size,
5265 thr_time_off);
5266 } while (count < 0 && errno == EINTR);
5267 ::close(fd);
5268 if ( count < 0 ) return -1;
5269
5270 if (user_sys_cpu_time) {
5271 // user + system CPU time
5272 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5273 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5274 (jlong)prusage.pr_stime.tv_nsec +
5275 (jlong)prusage.pr_utime.tv_nsec;
5276 } else {
5277 // user level CPU time only
5278 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5279 (jlong)prusage.pr_utime.tv_nsec;
5280 }
5281
5282 return(lwp_time);
5283 }
5284
5285 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5286 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5287 info_ptr->may_skip_backward = false; // elapsed time not wall time
5288 info_ptr->may_skip_forward = false; // elapsed time not wall time
5289 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5290 }
5291
5292 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5293 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5294 info_ptr->may_skip_backward = false; // elapsed time not wall time
5295 info_ptr->may_skip_forward = false; // elapsed time not wall time
5296 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5297 }
5298
5299 bool os::is_thread_cpu_time_supported() {
5300 return true;
5301 }
5302
5303 // System loadavg support. Returns -1 if load average cannot be obtained.
5304 // Return the load average for our processor set if the primitive exists
5305 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5306 int os::loadavg(double loadavg[], int nelem) {
5307 if (pset_getloadavg_ptr != NULL) {
5308 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5309 } else {
5310 return ::getloadavg(loadavg, nelem);
5311 }
5312 }
5313
5314 //---------------------------------------------------------------------------------
5315
5316 bool os::find(address addr, outputStream* st) {
5317 Dl_info dlinfo;
5318 memset(&dlinfo, 0, sizeof(dlinfo));
5319 if (dladdr(addr, &dlinfo) != 0) {
5320 st->print(PTR_FORMAT ": ", addr);
5321 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
5322 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5323 } else if (dlinfo.dli_fbase != NULL)
5324 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5325 else
5326 st->print("<absolute address>");
5327 if (dlinfo.dli_fname != NULL) {
5328 st->print(" in %s", dlinfo.dli_fname);
5329 }
5330 if (dlinfo.dli_fbase != NULL) {
5331 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
5332 }
5333 st->cr();
5334
5335 if (Verbose) {
5336 // decode some bytes around the PC
5337 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size());
5338 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size());
5339 address lowest = (address) dlinfo.dli_sname;
5340 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5341 if (begin < lowest) begin = lowest;
5342 Dl_info dlinfo2;
5343 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
5344 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
5345 end = (address) dlinfo2.dli_saddr;
5346 Disassembler::decode(begin, end, st);
5347 }
5348 return true;
5349 }
5350 return false;
5351 }
5352
5353 // Following function has been added to support HotSparc's libjvm.so running
5354 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5355 // src/solaris/hpi/native_threads in the EVM codebase.
5356 //
5357 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5358 // libraries and should thus be removed. We will leave it behind for a while
5359 // until we no longer want to able to run on top of 1.3.0 Solaris production
5360 // JDK. See 4341971.
5361
5362 #define STACK_SLACK 0x800
5363
5364 extern "C" {
5365 intptr_t sysThreadAvailableStackWithSlack() {
5366 stack_t st;
5367 intptr_t retval, stack_top;
5368 retval = thr_stksegment(&st);
5369 assert(retval == 0, "incorrect return value from thr_stksegment");
5370 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5371 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5372 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5373 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5374 }
5375 }
5376
5377 // ObjectMonitor park-unpark infrastructure ...
5378 //
5379 // We implement Solaris and Linux PlatformEvents with the
5380 // obvious condvar-mutex-flag triple.
5381 // Another alternative that works quite well is pipes:
5382 // Each PlatformEvent consists of a pipe-pair.
5383 // The thread associated with the PlatformEvent
5384 // calls park(), which reads from the input end of the pipe.
5385 // Unpark() writes into the other end of the pipe.
5386 // The write-side of the pipe must be set NDELAY.
5387 // Unfortunately pipes consume a large # of handles.
5388 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5389 // Using pipes for the 1st few threads might be workable, however.
5390 //
5391 // park() is permitted to return spuriously.
5392 // Callers of park() should wrap the call to park() in
5393 // an appropriate loop. A litmus test for the correct
5394 // usage of park is the following: if park() were modified
5395 // to immediately return 0 your code should still work,
5396 // albeit degenerating to a spin loop.
5397 //
5398 // An interesting optimization for park() is to use a trylock()
5399 // to attempt to acquire the mutex. If the trylock() fails
5400 // then we know that a concurrent unpark() operation is in-progress.
5401 // in that case the park() code could simply set _count to 0
5402 // and return immediately. The subsequent park() operation *might*
5403 // return immediately. That's harmless as the caller of park() is
5404 // expected to loop. By using trylock() we will have avoided a
5405 // avoided a context switch caused by contention on the per-thread mutex.
5406 //
5407 // TODO-FIXME:
5408 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5409 // objectmonitor implementation.
5410 // 2. Collapse the JSR166 parker event, and the
5411 // objectmonitor ParkEvent into a single "Event" construct.
5412 // 3. In park() and unpark() add:
5413 // assert (Thread::current() == AssociatedWith).
5414 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5415 // 1-out-of-N park() operations will return immediately.
5416 //
5417 // _Event transitions in park()
5418 // -1 => -1 : illegal
5419 // 1 => 0 : pass - return immediately
5420 // 0 => -1 : block
5421 //
5422 // _Event serves as a restricted-range semaphore.
5423 //
5424 // Another possible encoding of _Event would be with
5425 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5426 //
5427 // TODO-FIXME: add DTRACE probes for:
5428 // 1. Tx parks
5429 // 2. Ty unparks Tx
5430 // 3. Tx resumes from park
5431
5432
5433 // value determined through experimentation
5434 #define ROUNDINGFIX 11
5435
5436 // utility to compute the abstime argument to timedwait.
5437 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5438
5439 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5440 // millis is the relative timeout time
5441 // abstime will be the absolute timeout time
5442 if (millis < 0) millis = 0;
5443 struct timeval now;
5444 int status = gettimeofday(&now, NULL);
5445 assert(status == 0, "gettimeofday");
5446 jlong seconds = millis / 1000;
5447 jlong max_wait_period;
5448
5449 if (UseLWPSynchronization) {
5450 // forward port of fix for 4275818 (not sleeping long enough)
5451 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5452 // _lwp_cond_timedwait() used a round_down algorithm rather
5453 // than a round_up. For millis less than our roundfactor
5454 // it rounded down to 0 which doesn't meet the spec.
5455 // For millis > roundfactor we may return a bit sooner, but
5456 // since we can not accurately identify the patch level and
5457 // this has already been fixed in Solaris 9 and 8 we will
5458 // leave it alone rather than always rounding down.
5459
5460 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5461 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5462 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5463 max_wait_period = 21000000;
5464 } else {
5465 max_wait_period = 50000000;
5466 }
5467 millis %= 1000;
5468 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5469 seconds = max_wait_period;
5470 }
5471 abstime->tv_sec = now.tv_sec + seconds;
5472 long usec = now.tv_usec + millis * 1000;
5473 if (usec >= 1000000) {
5474 abstime->tv_sec += 1;
5475 usec -= 1000000;
5476 }
5477 abstime->tv_nsec = usec * 1000;
5478 return abstime;
5479 }
5480
5481 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
5482 // Conceptually TryPark() should be equivalent to park(0).
5483
5484 int os::PlatformEvent::TryPark() {
5485 for (;;) {
5486 const int v = _Event ;
5487 guarantee ((v == 0) || (v == 1), "invariant") ;
5488 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
5489 }
5490 }
5491
5492 void os::PlatformEvent::park() { // AKA: down()
5493 // Invariant: Only the thread associated with the Event/PlatformEvent
5494 // may call park().
5495 int v ;
5496 for (;;) {
5497 v = _Event ;
5498 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5499 }
5500 guarantee (v >= 0, "invariant") ;
5501 if (v == 0) {
5502 // Do this the hard way by blocking ...
5503 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5504 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5505 // Only for SPARC >= V8PlusA
5506 #if defined(__sparc) && defined(COMPILER2)
5507 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5508 #endif
5509 int status = os::Solaris::mutex_lock(_mutex);
5510 assert_status(status == 0, status, "mutex_lock");
5511 guarantee (_nParked == 0, "invariant") ;
5512 ++ _nParked ;
5513 while (_Event < 0) {
5514 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5515 // Treat this the same as if the wait was interrupted
5516 // With usr/lib/lwp going to kernel, always handle ETIME
5517 status = os::Solaris::cond_wait(_cond, _mutex);
5518 if (status == ETIME) status = EINTR ;
5519 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5520 }
5521 -- _nParked ;
5522 _Event = 0 ;
5523 status = os::Solaris::mutex_unlock(_mutex);
5524 assert_status(status == 0, status, "mutex_unlock");
5525 // Paranoia to ensure our locked and lock-free paths interact
5526 // correctly with each other.
5527 OrderAccess::fence();
5528 }
5529 }
5530
5531 int os::PlatformEvent::park(jlong millis) {
5532 guarantee (_nParked == 0, "invariant") ;
5533 int v ;
5534 for (;;) {
5535 v = _Event ;
5536 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5537 }
5538 guarantee (v >= 0, "invariant") ;
5539 if (v != 0) return OS_OK ;
5540
5541 int ret = OS_TIMEOUT;
5542 timestruc_t abst;
5543 compute_abstime (&abst, millis);
5544
5545 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5546 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5547 // Only for SPARC >= V8PlusA
5548 #if defined(__sparc) && defined(COMPILER2)
5549 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5550 #endif
5551 int status = os::Solaris::mutex_lock(_mutex);
5552 assert_status(status == 0, status, "mutex_lock");
5553 guarantee (_nParked == 0, "invariant") ;
5554 ++ _nParked ;
5555 while (_Event < 0) {
5556 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5557 assert_status(status == 0 || status == EINTR ||
5558 status == ETIME || status == ETIMEDOUT,
5559 status, "cond_timedwait");
5560 if (!FilterSpuriousWakeups) break ; // previous semantics
5561 if (status == ETIME || status == ETIMEDOUT) break ;
5562 // We consume and ignore EINTR and spurious wakeups.
5563 }
5564 -- _nParked ;
5565 if (_Event >= 0) ret = OS_OK ;
5566 _Event = 0 ;
5567 status = os::Solaris::mutex_unlock(_mutex);
5568 assert_status(status == 0, status, "mutex_unlock");
5569 // Paranoia to ensure our locked and lock-free paths interact
5570 // correctly with each other.
5571 OrderAccess::fence();
5572 return ret;
5573 }
5574
5575 void os::PlatformEvent::unpark() {
5576 // Transitions for _Event:
5577 // 0 :=> 1
5578 // 1 :=> 1
5579 // -1 :=> either 0 or 1; must signal target thread
5580 // That is, we can safely transition _Event from -1 to either
5581 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back
5582 // unpark() calls.
5583 // See also: "Semaphores in Plan 9" by Mullender & Cox
5584 //
5585 // Note: Forcing a transition from "-1" to "1" on an unpark() means
5586 // that it will take two back-to-back park() calls for the owning
5587 // thread to block. This has the benefit of forcing a spurious return
5588 // from the first park() call after an unpark() call which will help
5589 // shake out uses of park() and unpark() without condition variables.
5590
5591 if (Atomic::xchg(1, &_Event) >= 0) return;
5592
5593 // If the thread associated with the event was parked, wake it.
5594 // Wait for the thread assoc with the PlatformEvent to vacate.
5595 int status = os::Solaris::mutex_lock(_mutex);
5596 assert_status(status == 0, status, "mutex_lock");
5597 int AnyWaiters = _nParked;
5598 status = os::Solaris::mutex_unlock(_mutex);
5599 assert_status(status == 0, status, "mutex_unlock");
5600 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
5601 if (AnyWaiters != 0) {
5602 // We intentional signal *after* dropping the lock
5603 // to avoid a common class of futile wakeups.
5604 status = os::Solaris::cond_signal(_cond);
5605 assert_status(status == 0, status, "cond_signal");
5606 }
5607 }
5608
5609 // JSR166
5610 // -------------------------------------------------------
5611
5612 /*
5613 * The solaris and linux implementations of park/unpark are fairly
5614 * conservative for now, but can be improved. They currently use a
5615 * mutex/condvar pair, plus _counter.
5616 * Park decrements _counter if > 0, else does a condvar wait. Unpark
5617 * sets count to 1 and signals condvar. Only one thread ever waits
5618 * on the condvar. Contention seen when trying to park implies that someone
5619 * is unparking you, so don't wait. And spurious returns are fine, so there
5620 * is no need to track notifications.
5621 */
5622
5623 #define MAX_SECS 100000000
5624 /*
5625 * This code is common to linux and solaris and will be moved to a
5626 * common place in dolphin.
5627 *
5628 * The passed in time value is either a relative time in nanoseconds
5629 * or an absolute time in milliseconds. Either way it has to be unpacked
5630 * into suitable seconds and nanoseconds components and stored in the
5631 * given timespec structure.
5632 * Given time is a 64-bit value and the time_t used in the timespec is only
5633 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
5634 * overflow if times way in the future are given. Further on Solaris versions
5635 * prior to 10 there is a restriction (see cond_timedwait) that the specified
5636 * number of seconds, in abstime, is less than current_time + 100,000,000.
5637 * As it will be 28 years before "now + 100000000" will overflow we can
5638 * ignore overflow and just impose a hard-limit on seconds using the value
5639 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
5640 * years from "now".
5641 */
5642 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5643 assert (time > 0, "convertTime");
5644
5645 struct timeval now;
5646 int status = gettimeofday(&now, NULL);
5647 assert(status == 0, "gettimeofday");
5648
5649 time_t max_secs = now.tv_sec + MAX_SECS;
5650
5651 if (isAbsolute) {
5652 jlong secs = time / 1000;
5653 if (secs > max_secs) {
5654 absTime->tv_sec = max_secs;
5655 }
5656 else {
5657 absTime->tv_sec = secs;
5658 }
5659 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5660 }
5661 else {
5662 jlong secs = time / NANOSECS_PER_SEC;
5663 if (secs >= MAX_SECS) {
5664 absTime->tv_sec = max_secs;
5665 absTime->tv_nsec = 0;
5666 }
5667 else {
5668 absTime->tv_sec = now.tv_sec + secs;
5669 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5670 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5671 absTime->tv_nsec -= NANOSECS_PER_SEC;
5672 ++absTime->tv_sec; // note: this must be <= max_secs
5673 }
5674 }
5675 }
5676 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5677 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5678 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5679 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5680 }
5681
5682 void Parker::park(bool isAbsolute, jlong time) {
5683 // Ideally we'd do something useful while spinning, such
5684 // as calling unpackTime().
5685
5686 // Optional fast-path check:
5687 // Return immediately if a permit is available.
5688 // We depend on Atomic::xchg() having full barrier semantics
5689 // since we are doing a lock-free update to _counter.
5690 if (Atomic::xchg(0, &_counter) > 0) return;
5691
5692 // Optional fast-exit: Check interrupt before trying to wait
5693 Thread* thread = Thread::current();
5694 assert(thread->is_Java_thread(), "Must be JavaThread");
5695 JavaThread *jt = (JavaThread *)thread;
5696 if (Thread::is_interrupted(thread, false)) {
5697 return;
5698 }
5699
5700 // First, demultiplex/decode time arguments
5701 timespec absTime;
5702 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
5703 return;
5704 }
5705 if (time > 0) {
5706 // Warning: this code might be exposed to the old Solaris time
5707 // round-down bugs. Grep "roundingFix" for details.
5708 unpackTime(&absTime, isAbsolute, time);
5709 }
5710
5711 // Enter safepoint region
5712 // Beware of deadlocks such as 6317397.
5713 // The per-thread Parker:: _mutex is a classic leaf-lock.
5714 // In particular a thread must never block on the Threads_lock while
5715 // holding the Parker:: mutex. If safepoints are pending both the
5716 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
5717 ThreadBlockInVM tbivm(jt);
5718
5719 // Don't wait if cannot get lock since interference arises from
5720 // unblocking. Also. check interrupt before trying wait
5721 if (Thread::is_interrupted(thread, false) ||
5722 os::Solaris::mutex_trylock(_mutex) != 0) {
5723 return;
5724 }
5725
5726 int status ;
5727
5728 if (_counter > 0) { // no wait needed
5729 _counter = 0;
5730 status = os::Solaris::mutex_unlock(_mutex);
5731 assert (status == 0, "invariant") ;
5732 // Paranoia to ensure our locked and lock-free paths interact
5733 // correctly with each other and Java-level accesses.
5734 OrderAccess::fence();
5735 return;
5736 }
5737
5738 #ifdef ASSERT
5739 // Don't catch signals while blocked; let the running threads have the signals.
5740 // (This allows a debugger to break into the running thread.)
5741 sigset_t oldsigs;
5742 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
5743 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
5744 #endif
5745
5746 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
5747 jt->set_suspend_equivalent();
5748 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
5749
5750 // Do this the hard way by blocking ...
5751 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5752 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5753 // Only for SPARC >= V8PlusA
5754 #if defined(__sparc) && defined(COMPILER2)
5755 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5756 #endif
5757
5758 if (time == 0) {
5759 status = os::Solaris::cond_wait (_cond, _mutex) ;
5760 } else {
5761 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
5762 }
5763 // Note that an untimed cond_wait() can sometimes return ETIME on older
5764 // versions of the Solaris.
5765 assert_status(status == 0 || status == EINTR ||
5766 status == ETIME || status == ETIMEDOUT,
5767 status, "cond_timedwait");
5768
5769 #ifdef ASSERT
5770 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
5771 #endif
5772 _counter = 0 ;
5773 status = os::Solaris::mutex_unlock(_mutex);
5774 assert_status(status == 0, status, "mutex_unlock") ;
5775 // Paranoia to ensure our locked and lock-free paths interact
5776 // correctly with each other and Java-level accesses.
5777 OrderAccess::fence();
5778
5779 // If externally suspended while waiting, re-suspend
5780 if (jt->handle_special_suspend_equivalent_condition()) {
5781 jt->java_suspend_self();
5782 }
5783 }
5784
5785 void Parker::unpark() {
5786 int s, status ;
5787 status = os::Solaris::mutex_lock (_mutex) ;
5788 assert (status == 0, "invariant") ;
5789 s = _counter;
5790 _counter = 1;
5791 status = os::Solaris::mutex_unlock (_mutex) ;
5792 assert (status == 0, "invariant") ;
5793
5794 if (s < 1) {
5795 status = os::Solaris::cond_signal (_cond) ;
5796 assert (status == 0, "invariant") ;
5797 }
5798 }
5799
5800 extern char** environ;
5801
5802 // Run the specified command in a separate process. Return its exit value,
5803 // or -1 on failure (e.g. can't fork a new process).
5804 // Unlike system(), this function can be called from signal handler. It
5805 // doesn't block SIGINT et al.
5806 int os::fork_and_exec(char* cmd) {
5807 char * argv[4];
5808 argv[0] = (char *)"sh";
5809 argv[1] = (char *)"-c";
5810 argv[2] = cmd;
5811 argv[3] = NULL;
5812
5813 // fork is async-safe, fork1 is not so can't use in signal handler
5814 pid_t pid;
5815 Thread* t = ThreadLocalStorage::get_thread_slow();
5816 if (t != NULL && t->is_inside_signal_handler()) {
5817 pid = fork();
5818 } else {
5819 pid = fork1();
5820 }
5821
5822 if (pid < 0) {
5823 // fork failed
5824 warning("fork failed: %s", strerror(errno));
5825 return -1;
5826
5827 } else if (pid == 0) {
5828 // child process
5829
5830 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
5831 execve("/usr/bin/sh", argv, environ);
5832
5833 // execve failed
5834 _exit(-1);
5835
5836 } else {
5837 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5838 // care about the actual exit code, for now.
5839
5840 int status;
5841
5842 // Wait for the child process to exit. This returns immediately if
5843 // the child has already exited. */
5844 while (waitpid(pid, &status, 0) < 0) {
5845 switch (errno) {
5846 case ECHILD: return 0;
5847 case EINTR: break;
5848 default: return -1;
5849 }
5850 }
5851
5852 if (WIFEXITED(status)) {
5853 // The child exited normally; get its exit code.
5854 return WEXITSTATUS(status);
5855 } else if (WIFSIGNALED(status)) {
5856 // The child exited because of a signal
5857 // The best value to return is 0x80 + signal number,
5858 // because that is what all Unix shells do, and because
5859 // it allows callers to distinguish between process exit and
5860 // process death by signal.
5861 return 0x80 + WTERMSIG(status);
5862 } else {
5863 // Unknown exit code; pass it through
5864 return status;
5865 }
5866 }
5867 }
5868
5869 // is_headless_jre()
5870 //
5871 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
5872 // in order to report if we are running in a headless jre
5873 //
5874 // Since JDK8 xawt/libmawt.so was moved into the same directory
5875 // as libawt.so, and renamed libawt_xawt.so
5876 //
5877 bool os::is_headless_jre() {
5878 struct stat statbuf;
5879 char buf[MAXPATHLEN];
5880 char libmawtpath[MAXPATHLEN];
5881 const char *xawtstr = "/xawt/libmawt.so";
5882 const char *new_xawtstr = "/libawt_xawt.so";
5883 char *p;
5884
5885 // Get path to libjvm.so
5886 os::jvm_path(buf, sizeof(buf));
5887
5888 // Get rid of libjvm.so
5889 p = strrchr(buf, '/');
5890 if (p == NULL) return false;
5891 else *p = '\0';
5892
5893 // Get rid of client or server
5894 p = strrchr(buf, '/');
5895 if (p == NULL) return false;
5896 else *p = '\0';
5897
5898 // check xawt/libmawt.so
5899 strcpy(libmawtpath, buf);
5900 strcat(libmawtpath, xawtstr);
5901 if (::stat(libmawtpath, &statbuf) == 0) return false;
5902
5903 // check libawt_xawt.so
5904 strcpy(libmawtpath, buf);
5905 strcat(libmawtpath, new_xawtstr);
5906 if (::stat(libmawtpath, &statbuf) == 0) return false;
5907
5908 return true;
5909 }
5910
5911 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
5912 size_t res;
5913 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5914 "Assumed _thread_in_native");
5915 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
5916 return res;
5917 }
5918
5919 int os::close(int fd) {
5920 return ::close(fd);
5921 }
5922
5923 int os::socket_close(int fd) {
5924 return ::close(fd);
5925 }
5926
5927 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
5928 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5929 "Assumed _thread_in_native");
5930 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags));
5931 }
5932
5933 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
5934 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5935 "Assumed _thread_in_native");
5936 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5937 }
5938
5939 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
5940 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5941 }
5942
5943 // As both poll and select can be interrupted by signals, we have to be
5944 // prepared to restart the system call after updating the timeout, unless
5945 // a poll() is done with timeout == -1, in which case we repeat with this
5946 // "wait forever" value.
5947
5948 int os::timeout(int fd, long timeout) {
5949 int res;
5950 struct timeval t;
5951 julong prevtime, newtime;
5952 static const char* aNull = 0;
5953 struct pollfd pfd;
5954 pfd.fd = fd;
5955 pfd.events = POLLIN;
5956
5957 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5958 "Assumed _thread_in_native");
5959
5960 gettimeofday(&t, &aNull);
5961 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
5962
5963 for(;;) {
5964 res = ::poll(&pfd, 1, timeout);
5965 if(res == OS_ERR && errno == EINTR) {
5966 if(timeout != -1) {
5967 gettimeofday(&t, &aNull);
5968 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000;
5969 timeout -= newtime - prevtime;
5970 if(timeout <= 0)
5971 return OS_OK;
5972 prevtime = newtime;
5973 }
5974 } else return res;
5975 }
5976 }
5977
5978 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
5979 int _result;
5980 _result = ::connect(fd, him, len);
5981
5982 // On Solaris, when a connect() call is interrupted, the connection
5983 // can be established asynchronously (see 6343810). Subsequent calls
5984 // to connect() must check the errno value which has the semantic
5985 // described below (copied from the connect() man page). Handling
5986 // of asynchronously established connections is required for both
5987 // blocking and non-blocking sockets.
5988 // EINTR The connection attempt was interrupted
5989 // before any data arrived by the delivery of
5990 // a signal. The connection, however, will be
5991 // established asynchronously.
5992 //
5993 // EINPROGRESS The socket is non-blocking, and the connec-
5994 // tion cannot be completed immediately.
5995 //
5996 // EALREADY The socket is non-blocking, and a previous
5997 // connection attempt has not yet been com-
5998 // pleted.
5999 //
6000 // EISCONN The socket is already connected.
6001 if (_result == OS_ERR && errno == EINTR) {
6002 /* restarting a connect() changes its errno semantics */
6003 RESTARTABLE(::connect(fd, him, len), _result);
6004 /* undo these changes */
6005 if (_result == OS_ERR) {
6006 if (errno == EALREADY) {
6007 errno = EINPROGRESS; /* fall through */
6008 } else if (errno == EISCONN) {
6009 errno = 0;
6010 return OS_OK;
6011 }
6012 }
6013 }
6014 return _result;
6015 }
6016
6017 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
6018 if (fd < 0) {
6019 return OS_ERR;
6020 }
6021 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
6022 "Assumed _thread_in_native");
6023 RESTARTABLE_RETURN_INT((int)::accept(fd, him, len));
6024 }
6025
6026 int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
6027 sockaddr* from, socklen_t* fromlen) {
6028 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
6029 "Assumed _thread_in_native");
6030 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen));
6031 }
6032
6033 int os::sendto(int fd, char* buf, size_t len, uint flags,
6034 struct sockaddr* to, socklen_t tolen) {
6035 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
6036 "Assumed _thread_in_native");
6037 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen));
6038 }
6039
6040 int os::socket_available(int fd, jint *pbytes) {
6041 if (fd < 0) {
6042 return OS_OK;
6043 }
6044 int ret;
6045 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
6046 // note: ioctl can return 0 when successful, JVM_SocketAvailable
6047 // is expected to return 0 on failure and 1 on success to the jdk.
6048 return (ret == OS_ERR) ? 0 : 1;
6049 }
6050
6051 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
6052 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
6053 "Assumed _thread_in_native");
6054 return ::bind(fd, him, len);
6055 }
6056
6057 // Get the default path to the core file
6058 // Returns the length of the string
6059 int os::get_core_path(char* buffer, size_t bufferSize) {
6060 const char* p = get_current_directory(buffer, bufferSize);
6061
6062 if (p == NULL) {
6063 assert(p != NULL, "failed to get current directory");
6064 return 0;
6065 }
6066
6067 return strlen(buffer);
6068 }
6069
6070 #ifndef PRODUCT
6071 void TestReserveMemorySpecial_test() {
6072 // No tests available for this platform
6073 }
6074 #endif