1 /*
2 * Copyright (c) 1997, 2015, 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 "os_solaris.inline.hpp"
41 #include "prims/jniFastGetField.hpp"
42 #include "prims/jvm.h"
43 #include "prims/jvm_misc.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/atomic.inline.hpp"
46 #include "runtime/extendedPC.hpp"
47 #include "runtime/globals.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/java.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/mutexLocker.hpp"
52 #include "runtime/objectMonitor.hpp"
53 #include "runtime/orderAccess.inline.hpp"
54 #include "runtime/osThread.hpp"
55 #include "runtime/perfMemory.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "runtime/statSampler.hpp"
58 #include "runtime/stubRoutines.hpp"
59 #include "runtime/thread.inline.hpp"
60 #include "runtime/threadCritical.hpp"
61 #include "runtime/timer.hpp"
62 #include "runtime/vm_version.hpp"
63 #include "semaphore_posix.hpp"
64 #include "services/attachListener.hpp"
65 #include "services/memTracker.hpp"
66 #include "services/runtimeService.hpp"
67 #include "utilities/decoder.hpp"
68 #include "utilities/defaultStream.hpp"
69 #include "utilities/events.hpp"
70 #include "utilities/growableArray.hpp"
71 #include "utilities/vmError.hpp"
72
73 // put OS-includes here
74 # include <dlfcn.h>
75 # include <errno.h>
76 # include <exception>
77 # include <link.h>
78 # include <poll.h>
79 # include <pthread.h>
80 # include <pwd.h>
81 # include <schedctl.h>
82 # include <setjmp.h>
83 # include <signal.h>
84 # include <stdio.h>
85 # include <alloca.h>
86 # include <sys/filio.h>
87 # include <sys/ipc.h>
88 # include <sys/lwp.h>
89 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
90 # include <sys/mman.h>
91 # include <sys/processor.h>
92 # include <sys/procset.h>
93 # include <sys/pset.h>
94 # include <sys/resource.h>
95 # include <sys/shm.h>
96 # include <sys/socket.h>
97 # include <sys/stat.h>
98 # include <sys/systeminfo.h>
99 # include <sys/time.h>
100 # include <sys/times.h>
101 # include <sys/types.h>
102 # include <sys/wait.h>
103 # include <sys/utsname.h>
104 # include <thread.h>
105 # include <unistd.h>
106 # include <sys/priocntl.h>
107 # include <sys/rtpriocntl.h>
108 # include <sys/tspriocntl.h>
109 # include <sys/iapriocntl.h>
110 # include <sys/fxpriocntl.h>
111 # include <sys/loadavg.h>
112 # include <string.h>
113 # include <stdio.h>
114
115 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
116 # include <sys/procfs.h> // see comment in <sys/procfs.h>
117
118 #define MAX_PATH (2 * K)
119
120 // for timer info max values which include all bits
121 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
122
123
124 // Here are some liblgrp types from sys/lgrp_user.h to be able to
125 // compile on older systems without this header file.
126
127 #ifndef MADV_ACCESS_LWP
128 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
129 #endif
130 #ifndef MADV_ACCESS_MANY
131 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */
132 #endif
133
134 #ifndef LGRP_RSRC_CPU
135 #define LGRP_RSRC_CPU 0 /* CPU resources */
136 #endif
137 #ifndef LGRP_RSRC_MEM
138 #define LGRP_RSRC_MEM 1 /* memory resources */
139 #endif
140
141 // see thr_setprio(3T) for the basis of these numbers
142 #define MinimumPriority 0
143 #define NormalPriority 64
144 #define MaximumPriority 127
145
146 // Values for ThreadPriorityPolicy == 1
147 int prio_policy1[CriticalPriority+1] = {
148 -99999, 0, 16, 32, 48, 64,
149 80, 96, 112, 124, 127, 127 };
150
151 // System parameters used internally
152 static clock_t clock_tics_per_sec = 100;
153
154 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
155 static bool enabled_extended_FILE_stdio = false;
156
157 // For diagnostics to print a message once. see run_periodic_checks
158 static bool check_addr0_done = false;
159 static sigset_t check_signal_done;
160 static bool check_signals = true;
161
162 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
163 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
164
165 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
166
167
168 // "default" initializers for missing libc APIs
169 extern "C" {
170 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
171 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
172
173 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
174 static int lwp_cond_destroy(cond_t *cv) { return 0; }
175 }
176
177 // "default" initializers for pthread-based synchronization
178 extern "C" {
179 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
180 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
181 }
182
183 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time);
184
185 // Thread Local Storage
186 // This is common to all Solaris platforms so it is defined here,
187 // in this common file.
188 // The declarations are in the os_cpu threadLS*.hpp files.
189 //
190 // Static member initialization for TLS
191 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
192
193 #ifndef PRODUCT
194 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
195
196 int ThreadLocalStorage::_tcacheHit = 0;
197 int ThreadLocalStorage::_tcacheMiss = 0;
198
199 void ThreadLocalStorage::print_statistics() {
200 int total = _tcacheMiss+_tcacheHit;
201 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
202 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
203 }
204 #undef _PCT
205 #endif // PRODUCT
206
207 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
208 int index) {
209 Thread *thread = get_thread_slow();
210 if (thread != NULL) {
211 address sp = os::current_stack_pointer();
212 guarantee(thread->_stack_base == NULL ||
213 (sp <= thread->_stack_base &&
214 sp >= thread->_stack_base - thread->_stack_size) ||
215 is_error_reported(),
216 "sp must be inside of selected thread stack");
217
218 thread->set_self_raw_id(raw_id); // mark for quick retrieval
219 _get_thread_cache[index] = thread;
220 }
221 return thread;
222 }
223
224
225 static const double all_zero[sizeof(Thread) / sizeof(double) + 1] = {0};
226 #define NO_CACHED_THREAD ((Thread*)all_zero)
227
228 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
229
230 // Store the new value before updating the cache to prevent a race
231 // between get_thread_via_cache_slowly() and this store operation.
232 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
233
234 // Update thread cache with new thread if setting on thread create,
235 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
236 uintptr_t raw = pd_raw_thread_id();
237 int ix = pd_cache_index(raw);
238 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
239 }
240
241 void ThreadLocalStorage::pd_init() {
242 for (int i = 0; i < _pd_cache_size; i++) {
243 _get_thread_cache[i] = NO_CACHED_THREAD;
244 }
245 }
246
247 // Invalidate all the caches (happens to be the same as pd_init).
248 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
249
250 #undef NO_CACHED_THREAD
251
252 // END Thread Local Storage
253
254 static inline size_t adjust_stack_size(address base, size_t size) {
255 if ((ssize_t)size < 0) {
256 // 4759953: Compensate for ridiculous stack size.
257 size = max_intx;
258 }
259 if (size > (size_t)base) {
260 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
261 size = (size_t)base;
262 }
263 return size;
264 }
265
266 static inline stack_t get_stack_info() {
267 stack_t st;
268 int retval = thr_stksegment(&st);
269 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
270 assert(retval == 0, "incorrect return value from thr_stksegment");
271 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
272 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
273 return st;
274 }
275
276 address os::current_stack_base() {
277 int r = thr_main();
278 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
279 bool is_primordial_thread = r;
280
281 // Workaround 4352906, avoid calls to thr_stksegment by
282 // thr_main after the first one (it looks like we trash
283 // some data, causing the value for ss_sp to be incorrect).
284 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
285 stack_t st = get_stack_info();
286 if (is_primordial_thread) {
287 // cache initial value of stack base
288 os::Solaris::_main_stack_base = (address)st.ss_sp;
289 }
290 return (address)st.ss_sp;
291 } else {
292 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
293 return os::Solaris::_main_stack_base;
294 }
295 }
296
297 size_t os::current_stack_size() {
298 size_t size;
299
300 int r = thr_main();
301 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
302 if (!r) {
303 size = get_stack_info().ss_size;
304 } else {
305 struct rlimit limits;
306 getrlimit(RLIMIT_STACK, &limits);
307 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
308 }
309 // base may not be page aligned
310 address base = current_stack_base();
311 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
312 return (size_t)(base - bottom);
313 }
314
315 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
316 return localtime_r(clock, res);
317 }
318
319 void os::Solaris::try_enable_extended_io() {
320 typedef int (*enable_extended_FILE_stdio_t)(int, int);
321
322 if (!UseExtendedFileIO) {
323 return;
324 }
325
326 enable_extended_FILE_stdio_t enabler =
327 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
328 "enable_extended_FILE_stdio");
329 if (enabler) {
330 enabler(-1, -1);
331 }
332 }
333
334 static int _processors_online = 0;
335
336 jint os::Solaris::_os_thread_limit = 0;
337 volatile jint os::Solaris::_os_thread_count = 0;
338
339 julong os::available_memory() {
340 return Solaris::available_memory();
341 }
342
343 julong os::Solaris::available_memory() {
344 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
345 }
346
347 julong os::Solaris::_physical_memory = 0;
348
349 julong os::physical_memory() {
350 return Solaris::physical_memory();
351 }
352
353 static hrtime_t first_hrtime = 0;
354 static const hrtime_t hrtime_hz = 1000*1000*1000;
355 static volatile hrtime_t max_hrtime = 0;
356
357
358 void os::Solaris::initialize_system_info() {
359 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
360 _processors_online = sysconf(_SC_NPROCESSORS_ONLN);
361 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) *
362 (julong)sysconf(_SC_PAGESIZE);
363 }
364
365 int os::active_processor_count() {
366 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
367 pid_t pid = getpid();
368 psetid_t pset = PS_NONE;
369 // Are we running in a processor set or is there any processor set around?
370 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
371 uint_t pset_cpus;
372 // Query the number of cpus available to us.
373 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
374 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
375 _processors_online = pset_cpus;
376 return pset_cpus;
377 }
378 }
379 // Otherwise return number of online cpus
380 return online_cpus;
381 }
382
383 static bool find_processors_in_pset(psetid_t pset,
384 processorid_t** id_array,
385 uint_t* id_length) {
386 bool result = false;
387 // Find the number of processors in the processor set.
388 if (pset_info(pset, NULL, id_length, NULL) == 0) {
389 // Make up an array to hold their ids.
390 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
391 // Fill in the array with their processor ids.
392 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
393 result = true;
394 }
395 }
396 return result;
397 }
398
399 // Callers of find_processors_online() must tolerate imprecise results --
400 // the system configuration can change asynchronously because of DR
401 // or explicit psradm operations.
402 //
403 // We also need to take care that the loop (below) terminates as the
404 // number of processors online can change between the _SC_NPROCESSORS_ONLN
405 // request and the loop that builds the list of processor ids. Unfortunately
406 // there's no reliable way to determine the maximum valid processor id,
407 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
408 // man pages, which claim the processor id set is "sparse, but
409 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
410 // exit the loop.
411 //
412 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
413 // not available on S8.0.
414
415 static bool find_processors_online(processorid_t** id_array,
416 uint* id_length) {
417 const processorid_t MAX_PROCESSOR_ID = 100000;
418 // Find the number of processors online.
419 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
420 // Make up an array to hold their ids.
421 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
422 // Processors need not be numbered consecutively.
423 long found = 0;
424 processorid_t next = 0;
425 while (found < *id_length && next < MAX_PROCESSOR_ID) {
426 processor_info_t info;
427 if (processor_info(next, &info) == 0) {
428 // NB, PI_NOINTR processors are effectively online ...
429 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
430 (*id_array)[found] = next;
431 found += 1;
432 }
433 }
434 next += 1;
435 }
436 if (found < *id_length) {
437 // The loop above didn't identify the expected number of processors.
438 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
439 // and re-running the loop, above, but there's no guarantee of progress
440 // if the system configuration is in flux. Instead, we just return what
441 // we've got. Note that in the worst case find_processors_online() could
442 // return an empty set. (As a fall-back in the case of the empty set we
443 // could just return the ID of the current processor).
444 *id_length = found;
445 }
446
447 return true;
448 }
449
450 static bool assign_distribution(processorid_t* id_array,
451 uint id_length,
452 uint* distribution,
453 uint distribution_length) {
454 // We assume we can assign processorid_t's to uint's.
455 assert(sizeof(processorid_t) == sizeof(uint),
456 "can't convert processorid_t to uint");
457 // Quick check to see if we won't succeed.
458 if (id_length < distribution_length) {
459 return false;
460 }
461 // Assign processor ids to the distribution.
462 // Try to shuffle processors to distribute work across boards,
463 // assuming 4 processors per board.
464 const uint processors_per_board = ProcessDistributionStride;
465 // Find the maximum processor id.
466 processorid_t max_id = 0;
467 for (uint m = 0; m < id_length; m += 1) {
468 max_id = MAX2(max_id, id_array[m]);
469 }
470 // The next id, to limit loops.
471 const processorid_t limit_id = max_id + 1;
472 // Make up markers for available processors.
473 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
474 for (uint c = 0; c < limit_id; c += 1) {
475 available_id[c] = false;
476 }
477 for (uint a = 0; a < id_length; a += 1) {
478 available_id[id_array[a]] = true;
479 }
480 // Step by "boards", then by "slot", copying to "assigned".
481 // NEEDS_CLEANUP: The assignment of processors should be stateful,
482 // remembering which processors have been assigned by
483 // previous calls, etc., so as to distribute several
484 // independent calls of this method. What we'd like is
485 // It would be nice to have an API that let us ask
486 // how many processes are bound to a processor,
487 // but we don't have that, either.
488 // In the short term, "board" is static so that
489 // subsequent distributions don't all start at board 0.
490 static uint board = 0;
491 uint assigned = 0;
492 // Until we've found enough processors ....
493 while (assigned < distribution_length) {
494 // ... find the next available processor in the board.
495 for (uint slot = 0; slot < processors_per_board; slot += 1) {
496 uint try_id = board * processors_per_board + slot;
497 if ((try_id < limit_id) && (available_id[try_id] == true)) {
498 distribution[assigned] = try_id;
499 available_id[try_id] = false;
500 assigned += 1;
501 break;
502 }
503 }
504 board += 1;
505 if (board * processors_per_board + 0 >= limit_id) {
506 board = 0;
507 }
508 }
509 if (available_id != NULL) {
510 FREE_C_HEAP_ARRAY(bool, available_id);
511 }
512 return true;
513 }
514
515 void os::set_native_thread_name(const char *name) {
516 // Not yet implemented.
517 return;
518 }
519
520 bool os::distribute_processes(uint length, uint* distribution) {
521 bool result = false;
522 // Find the processor id's of all the available CPUs.
523 processorid_t* id_array = NULL;
524 uint id_length = 0;
525 // There are some races between querying information and using it,
526 // since processor sets can change dynamically.
527 psetid_t pset = PS_NONE;
528 // Are we running in a processor set?
529 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
530 result = find_processors_in_pset(pset, &id_array, &id_length);
531 } else {
532 result = find_processors_online(&id_array, &id_length);
533 }
534 if (result == true) {
535 if (id_length >= length) {
536 result = assign_distribution(id_array, id_length, distribution, length);
537 } else {
538 result = false;
539 }
540 }
541 if (id_array != NULL) {
542 FREE_C_HEAP_ARRAY(processorid_t, id_array);
543 }
544 return result;
545 }
546
547 bool os::bind_to_processor(uint processor_id) {
548 // We assume that a processorid_t can be stored in a uint.
549 assert(sizeof(uint) == sizeof(processorid_t),
550 "can't convert uint to processorid_t");
551 int bind_result =
552 processor_bind(P_LWPID, // bind LWP.
553 P_MYID, // bind current LWP.
554 (processorid_t) processor_id, // id.
555 NULL); // don't return old binding.
556 return (bind_result == 0);
557 }
558
559 // Return true if user is running as root.
560
561 bool os::have_special_privileges() {
562 static bool init = false;
563 static bool privileges = false;
564 if (!init) {
565 privileges = (getuid() != geteuid()) || (getgid() != getegid());
566 init = true;
567 }
568 return privileges;
569 }
570
571
572 void os::init_system_properties_values() {
573 // The next steps are taken in the product version:
574 //
575 // Obtain the JAVA_HOME value from the location of libjvm.so.
576 // This library should be located at:
577 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so.
578 //
579 // If "/jre/lib/" appears at the right place in the path, then we
580 // assume libjvm.so is installed in a JDK and we use this path.
581 //
582 // Otherwise exit with message: "Could not create the Java virtual machine."
583 //
584 // The following extra steps are taken in the debugging version:
585 //
586 // If "/jre/lib/" does NOT appear at the right place in the path
587 // instead of exit check for $JAVA_HOME environment variable.
588 //
589 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
590 // then we append a fake suffix "hotspot/libjvm.so" to this path so
591 // it looks like libjvm.so is installed there
592 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so.
593 //
594 // Otherwise exit.
595 //
596 // Important note: if the location of libjvm.so changes this
597 // code needs to be changed accordingly.
598
599 // Base path of extensions installed on the system.
600 #define SYS_EXT_DIR "/usr/jdk/packages"
601 #define EXTENSIONS_DIR "/lib/ext"
602
603 char cpu_arch[12];
604 // Buffer that fits several sprintfs.
605 // Note that the space for the colon and the trailing null are provided
606 // by the nulls included by the sizeof operator.
607 const size_t bufsize =
608 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends.
609 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path
610 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir
611 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal);
612
613 // sysclasspath, java_home, dll_dir
614 {
615 char *pslash;
616 os::jvm_path(buf, bufsize);
617
618 // Found the full path to libjvm.so.
619 // Now cut the path to <java_home>/jre if we can.
620 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so.
621 pslash = strrchr(buf, '/');
622 if (pslash != NULL) {
623 *pslash = '\0'; // Get rid of /{client|server|hotspot}.
624 }
625 Arguments::set_dll_dir(buf);
626
627 if (pslash != NULL) {
628 pslash = strrchr(buf, '/');
629 if (pslash != NULL) {
630 *pslash = '\0'; // Get rid of /<arch>.
631 pslash = strrchr(buf, '/');
632 if (pslash != NULL) {
633 *pslash = '\0'; // Get rid of /lib.
634 }
635 }
636 }
637 Arguments::set_java_home(buf);
638 set_boot_path('/', ':');
639 }
640
641 // Where to look for native libraries.
642 {
643 // Use dlinfo() to determine the correct java.library.path.
644 //
645 // If we're launched by the Java launcher, and the user
646 // does not set java.library.path explicitly on the commandline,
647 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
648 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
649 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
650 // /usr/lib), which is exactly what we want.
651 //
652 // If the user does set java.library.path, it completely
653 // overwrites this setting, and always has.
654 //
655 // If we're not launched by the Java launcher, we may
656 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
657 // settings. Again, dlinfo does exactly what we want.
658
659 Dl_serinfo info_sz, *info = &info_sz;
660 Dl_serpath *path;
661 char *library_path;
662 char *common_path = buf;
663
664 // Determine search path count and required buffer size.
665 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
666 FREE_C_HEAP_ARRAY(char, buf);
667 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
668 }
669
670 // Allocate new buffer and initialize.
671 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal);
672 info->dls_size = info_sz.dls_size;
673 info->dls_cnt = info_sz.dls_cnt;
674
675 // Obtain search path information.
676 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
677 FREE_C_HEAP_ARRAY(char, buf);
678 FREE_C_HEAP_ARRAY(char, info);
679 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
680 }
681
682 path = &info->dls_serpath[0];
683
684 // Note: Due to a legacy implementation, most of the library path
685 // is set in the launcher. This was to accomodate linking restrictions
686 // on legacy Solaris implementations (which are no longer supported).
687 // Eventually, all the library path setting will be done here.
688 //
689 // However, to prevent the proliferation of improperly built native
690 // libraries, the new path component /usr/jdk/packages is added here.
691
692 // Determine the actual CPU architecture.
693 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
694 #ifdef _LP64
695 // If we are a 64-bit vm, perform the following translations:
696 // sparc -> sparcv9
697 // i386 -> amd64
698 if (strcmp(cpu_arch, "sparc") == 0) {
699 strcat(cpu_arch, "v9");
700 } else if (strcmp(cpu_arch, "i386") == 0) {
701 strcpy(cpu_arch, "amd64");
702 }
703 #endif
704
705 // Construct the invariant part of ld_library_path.
706 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch);
707
708 // Struct size is more than sufficient for the path components obtained
709 // through the dlinfo() call, so only add additional space for the path
710 // components explicitly added here.
711 size_t library_path_size = info->dls_size + strlen(common_path);
712 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal);
713 library_path[0] = '\0';
714
715 // Construct the desired Java library path from the linker's library
716 // search path.
717 //
718 // For compatibility, it is optimal that we insert the additional path
719 // components specific to the Java VM after those components specified
720 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
721 // infrastructure.
722 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it.
723 strcpy(library_path, common_path);
724 } else {
725 int inserted = 0;
726 int i;
727 for (i = 0; i < info->dls_cnt; i++, path++) {
728 uint_t flags = path->dls_flags & LA_SER_MASK;
729 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
730 strcat(library_path, common_path);
731 strcat(library_path, os::path_separator());
732 inserted = 1;
733 }
734 strcat(library_path, path->dls_name);
735 strcat(library_path, os::path_separator());
736 }
737 // Eliminate trailing path separator.
738 library_path[strlen(library_path)-1] = '\0';
739 }
740
741 // happens before argument parsing - can't use a trace flag
742 // tty->print_raw("init_system_properties_values: native lib path: ");
743 // tty->print_raw_cr(library_path);
744
745 // Callee copies into its own buffer.
746 Arguments::set_library_path(library_path);
747
748 FREE_C_HEAP_ARRAY(char, library_path);
749 FREE_C_HEAP_ARRAY(char, info);
750 }
751
752 // Extensions directories.
753 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home());
754 Arguments::set_ext_dirs(buf);
755
756 FREE_C_HEAP_ARRAY(char, buf);
757
758 #undef SYS_EXT_DIR
759 #undef EXTENSIONS_DIR
760 }
761
762 void os::breakpoint() {
763 BREAKPOINT;
764 }
765
766 bool os::obsolete_option(const JavaVMOption *option) {
767 if (!strncmp(option->optionString, "-Xt", 3)) {
768 return true;
769 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
770 return true;
771 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
772 return true;
773 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
774 return true;
775 }
776 return false;
777 }
778
779 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
780 address stackStart = (address)thread->stack_base();
781 address stackEnd = (address)(stackStart - (address)thread->stack_size());
782 if (sp < stackStart && sp >= stackEnd) return true;
783 return false;
784 }
785
786 extern "C" void breakpoint() {
787 // use debugger to set breakpoint here
788 }
789
790 static thread_t main_thread;
791
792 // Thread start routine for all new Java threads
793 extern "C" void* java_start(void* thread_addr) {
794 // Try to randomize the cache line index of hot stack frames.
795 // This helps when threads of the same stack traces evict each other's
796 // cache lines. The threads can be either from the same JVM instance, or
797 // from different JVM instances. The benefit is especially true for
798 // processors with hyperthreading technology.
799 static int counter = 0;
800 int pid = os::current_process_id();
801 alloca(((pid ^ counter++) & 7) * 128);
802
803 int prio;
804 Thread* thread = (Thread*)thread_addr;
805 OSThread* osthr = thread->osthread();
806
807 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound
808 thread->_schedctl = (void *) schedctl_init();
809
810 if (UseNUMA) {
811 int lgrp_id = os::numa_get_group_id();
812 if (lgrp_id != -1) {
813 thread->set_lgrp_id(lgrp_id);
814 }
815 }
816
817 // If the creator called set priority before we started,
818 // we need to call set_native_priority now that we have an lwp.
819 // We used to get the priority from thr_getprio (we called
820 // thr_setprio way back in create_thread) and pass it to
821 // set_native_priority, but Solaris scales the priority
822 // in java_to_os_priority, so when we read it back here,
823 // we pass trash to set_native_priority instead of what's
824 // in java_to_os_priority. So we save the native priority
825 // in the osThread and recall it here.
826
827 if (osthr->thread_id() != -1) {
828 if (UseThreadPriorities) {
829 int prio = osthr->native_priority();
830 if (ThreadPriorityVerbose) {
831 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
832 INTPTR_FORMAT ", setting priority: %d\n",
833 osthr->thread_id(), osthr->lwp_id(), prio);
834 }
835 os::set_native_priority(thread, prio);
836 }
837 } else if (ThreadPriorityVerbose) {
838 warning("Can't set priority in _start routine, thread id hasn't been set\n");
839 }
840
841 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
842
843 // initialize signal mask for this thread
844 os::Solaris::hotspot_sigmask(thread);
845
846 thread->run();
847
848 // One less thread is executing
849 // When the VMThread gets here, the main thread may have already exited
850 // which frees the CodeHeap containing the Atomic::dec code
851 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
852 Atomic::dec(&os::Solaris::_os_thread_count);
853 }
854
855 if (UseDetachedThreads) {
856 thr_exit(NULL);
857 ShouldNotReachHere();
858 }
859 return NULL;
860 }
861
862 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
863 // Allocate the OSThread object
864 OSThread* osthread = new OSThread(NULL, NULL);
865 if (osthread == NULL) return NULL;
866
867 // Store info on the Solaris thread into the OSThread
868 osthread->set_thread_id(thread_id);
869 osthread->set_lwp_id(_lwp_self());
870 thread->_schedctl = (void *) schedctl_init();
871
872 if (UseNUMA) {
873 int lgrp_id = os::numa_get_group_id();
874 if (lgrp_id != -1) {
875 thread->set_lgrp_id(lgrp_id);
876 }
877 }
878
879 if (ThreadPriorityVerbose) {
880 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
881 osthread->thread_id(), osthread->lwp_id());
882 }
883
884 // Initial thread state is INITIALIZED, not SUSPENDED
885 osthread->set_state(INITIALIZED);
886
887 return osthread;
888 }
889
890 void os::Solaris::hotspot_sigmask(Thread* thread) {
891 //Save caller's signal mask
892 sigset_t sigmask;
893 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
894 OSThread *osthread = thread->osthread();
895 osthread->set_caller_sigmask(sigmask);
896
897 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
898 if (!ReduceSignalUsage) {
899 if (thread->is_VM_thread()) {
900 // Only the VM thread handles BREAK_SIGNAL ...
901 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
902 } else {
903 // ... all other threads block BREAK_SIGNAL
904 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
905 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
906 }
907 }
908 }
909
910 bool os::create_attached_thread(JavaThread* thread) {
911 #ifdef ASSERT
912 thread->verify_not_published();
913 #endif
914 OSThread* osthread = create_os_thread(thread, thr_self());
915 if (osthread == NULL) {
916 return false;
917 }
918
919 // Initial thread state is RUNNABLE
920 osthread->set_state(RUNNABLE);
921 thread->set_osthread(osthread);
922
923 // initialize signal mask for this thread
924 // and save the caller's signal mask
925 os::Solaris::hotspot_sigmask(thread);
926
927 return true;
928 }
929
930 bool os::create_main_thread(JavaThread* thread) {
931 #ifdef ASSERT
932 thread->verify_not_published();
933 #endif
934 if (_starting_thread == NULL) {
935 _starting_thread = create_os_thread(thread, main_thread);
936 if (_starting_thread == NULL) {
937 return false;
938 }
939 }
940
941 // The primodial thread is runnable from the start
942 _starting_thread->set_state(RUNNABLE);
943
944 thread->set_osthread(_starting_thread);
945
946 // initialize signal mask for this thread
947 // and save the caller's signal mask
948 os::Solaris::hotspot_sigmask(thread);
949
950 return true;
951 }
952
953
954 bool os::create_thread(Thread* thread, ThreadType thr_type,
955 size_t stack_size) {
956 // Allocate the OSThread object
957 OSThread* osthread = new OSThread(NULL, NULL);
958 if (osthread == NULL) {
959 return false;
960 }
961
962 if (ThreadPriorityVerbose) {
963 char *thrtyp;
964 switch (thr_type) {
965 case vm_thread:
966 thrtyp = (char *)"vm";
967 break;
968 case cgc_thread:
969 thrtyp = (char *)"cgc";
970 break;
971 case pgc_thread:
972 thrtyp = (char *)"pgc";
973 break;
974 case java_thread:
975 thrtyp = (char *)"java";
976 break;
977 case compiler_thread:
978 thrtyp = (char *)"compiler";
979 break;
980 case watcher_thread:
981 thrtyp = (char *)"watcher";
982 break;
983 default:
984 thrtyp = (char *)"unknown";
985 break;
986 }
987 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
988 }
989
990 // Calculate stack size if it's not specified by caller.
991 if (stack_size == 0) {
992 // The default stack size 1M (2M for LP64).
993 stack_size = (BytesPerWord >> 2) * K * K;
994
995 switch (thr_type) {
996 case os::java_thread:
997 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
998 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
999 break;
1000 case os::compiler_thread:
1001 if (CompilerThreadStackSize > 0) {
1002 stack_size = (size_t)(CompilerThreadStackSize * K);
1003 break;
1004 } // else fall through:
1005 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1006 case os::vm_thread:
1007 case os::pgc_thread:
1008 case os::cgc_thread:
1009 case os::watcher_thread:
1010 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1011 break;
1012 }
1013 }
1014 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1015
1016 // Initial state is ALLOCATED but not INITIALIZED
1017 osthread->set_state(ALLOCATED);
1018
1019 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1020 // We got lots of threads. Check if we still have some address space left.
1021 // Need to be at least 5Mb of unreserved address space. We do check by
1022 // trying to reserve some.
1023 const size_t VirtualMemoryBangSize = 20*K*K;
1024 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1025 if (mem == NULL) {
1026 delete osthread;
1027 return false;
1028 } else {
1029 // Release the memory again
1030 os::release_memory(mem, VirtualMemoryBangSize);
1031 }
1032 }
1033
1034 // Setup osthread because the child thread may need it.
1035 thread->set_osthread(osthread);
1036
1037 // Create the Solaris thread
1038 thread_t tid = 0;
1039 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED;
1040 int status;
1041
1042 // Mark that we don't have an lwp or thread id yet.
1043 // In case we attempt to set the priority before the thread starts.
1044 osthread->set_lwp_id(-1);
1045 osthread->set_thread_id(-1);
1046
1047 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1048 if (status != 0) {
1049 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1050 perror("os::create_thread");
1051 }
1052 thread->set_osthread(NULL);
1053 // Need to clean up stuff we've allocated so far
1054 delete osthread;
1055 return false;
1056 }
1057
1058 Atomic::inc(&os::Solaris::_os_thread_count);
1059
1060 // Store info on the Solaris thread into the OSThread
1061 osthread->set_thread_id(tid);
1062
1063 // Remember that we created this thread so we can set priority on it
1064 osthread->set_vm_created();
1065
1066 // Initial thread state is INITIALIZED, not SUSPENDED
1067 osthread->set_state(INITIALIZED);
1068
1069 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1070 return true;
1071 }
1072
1073 // defined for >= Solaris 10. This allows builds on earlier versions
1074 // of Solaris to take advantage of the newly reserved Solaris JVM signals
1075 // With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1076 // and -XX:+UseAltSigs does nothing since these should have no conflict
1077 //
1078 #if !defined(SIGJVM1)
1079 #define SIGJVM1 39
1080 #define SIGJVM2 40
1081 #endif
1082
1083 debug_only(static bool signal_sets_initialized = false);
1084 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1085 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1086 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1087
1088 bool os::Solaris::is_sig_ignored(int sig) {
1089 struct sigaction oact;
1090 sigaction(sig, (struct sigaction*)NULL, &oact);
1091 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1092 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1093 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) {
1094 return true;
1095 } else {
1096 return false;
1097 }
1098 }
1099
1100 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1101 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1102 static bool isJVM1available() {
1103 return SIGJVM1 < SIGRTMIN;
1104 }
1105
1106 void os::Solaris::signal_sets_init() {
1107 // Should also have an assertion stating we are still single-threaded.
1108 assert(!signal_sets_initialized, "Already initialized");
1109 // Fill in signals that are necessarily unblocked for all threads in
1110 // the VM. Currently, we unblock the following signals:
1111 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1112 // by -Xrs (=ReduceSignalUsage));
1113 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1114 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1115 // the dispositions or masks wrt these signals.
1116 // Programs embedding the VM that want to use the above signals for their
1117 // own purposes must, at this time, use the "-Xrs" option to prevent
1118 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1119 // (See bug 4345157, and other related bugs).
1120 // In reality, though, unblocking these signals is really a nop, since
1121 // these signals are not blocked by default.
1122 sigemptyset(&unblocked_sigs);
1123 sigemptyset(&allowdebug_blocked_sigs);
1124 sigaddset(&unblocked_sigs, SIGILL);
1125 sigaddset(&unblocked_sigs, SIGSEGV);
1126 sigaddset(&unblocked_sigs, SIGBUS);
1127 sigaddset(&unblocked_sigs, SIGFPE);
1128
1129 if (isJVM1available) {
1130 os::Solaris::set_SIGinterrupt(SIGJVM1);
1131 os::Solaris::set_SIGasync(SIGJVM2);
1132 } else if (UseAltSigs) {
1133 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1134 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1135 } else {
1136 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1137 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1138 }
1139
1140 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1141 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1142
1143 if (!ReduceSignalUsage) {
1144 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1145 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1146 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1147 }
1148 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1149 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1150 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1151 }
1152 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1153 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1154 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1155 }
1156 }
1157 // Fill in signals that are blocked by all but the VM thread.
1158 sigemptyset(&vm_sigs);
1159 if (!ReduceSignalUsage) {
1160 sigaddset(&vm_sigs, BREAK_SIGNAL);
1161 }
1162 debug_only(signal_sets_initialized = true);
1163
1164 // For diagnostics only used in run_periodic_checks
1165 sigemptyset(&check_signal_done);
1166 }
1167
1168 // These are signals that are unblocked while a thread is running Java.
1169 // (For some reason, they get blocked by default.)
1170 sigset_t* os::Solaris::unblocked_signals() {
1171 assert(signal_sets_initialized, "Not initialized");
1172 return &unblocked_sigs;
1173 }
1174
1175 // These are the signals that are blocked while a (non-VM) thread is
1176 // running Java. Only the VM thread handles these signals.
1177 sigset_t* os::Solaris::vm_signals() {
1178 assert(signal_sets_initialized, "Not initialized");
1179 return &vm_sigs;
1180 }
1181
1182 // These are signals that are blocked during cond_wait to allow debugger in
1183 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1184 assert(signal_sets_initialized, "Not initialized");
1185 return &allowdebug_blocked_sigs;
1186 }
1187
1188
1189 void _handle_uncaught_cxx_exception() {
1190 VMError err("An uncaught C++ exception");
1191 err.report_and_die();
1192 }
1193
1194
1195 // First crack at OS-specific initialization, from inside the new thread.
1196 void os::initialize_thread(Thread* thr) {
1197 int r = thr_main();
1198 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
1199 if (r) {
1200 JavaThread* jt = (JavaThread *)thr;
1201 assert(jt != NULL, "Sanity check");
1202 size_t stack_size;
1203 address base = jt->stack_base();
1204 if (Arguments::created_by_java_launcher()) {
1205 // Use 2MB to allow for Solaris 7 64 bit mode.
1206 stack_size = JavaThread::stack_size_at_create() == 0
1207 ? 2048*K : JavaThread::stack_size_at_create();
1208
1209 // There are rare cases when we may have already used more than
1210 // the basic stack size allotment before this method is invoked.
1211 // Attempt to allow for a normally sized java_stack.
1212 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1213 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1214 } else {
1215 // 6269555: If we were not created by a Java launcher, i.e. if we are
1216 // running embedded in a native application, treat the primordial thread
1217 // as much like a native attached thread as possible. This means using
1218 // the current stack size from thr_stksegment(), unless it is too large
1219 // to reliably setup guard pages. A reasonable max size is 8MB.
1220 size_t current_size = current_stack_size();
1221 // This should never happen, but just in case....
1222 if (current_size == 0) current_size = 2 * K * K;
1223 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1224 }
1225 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1226 stack_size = (size_t)(base - bottom);
1227
1228 assert(stack_size > 0, "Stack size calculation problem");
1229
1230 if (stack_size > jt->stack_size()) {
1231 #ifndef PRODUCT
1232 struct rlimit limits;
1233 getrlimit(RLIMIT_STACK, &limits);
1234 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1235 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1236 #endif
1237 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n"
1238 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1239 "See limit(1) to increase the stack size limit.",
1240 stack_size / K, jt->stack_size() / K);
1241 vm_exit(1);
1242 }
1243 assert(jt->stack_size() >= stack_size,
1244 "Attempt to map more stack than was allocated");
1245 jt->set_stack_size(stack_size);
1246 }
1247
1248 // With the T2 libthread (T1 is no longer supported) threads are always bound
1249 // and we use stackbanging in all cases.
1250
1251 os::Solaris::init_thread_fpu_state();
1252 std::set_terminate(_handle_uncaught_cxx_exception);
1253 }
1254
1255
1256
1257 // Free Solaris resources related to the OSThread
1258 void os::free_thread(OSThread* osthread) {
1259 assert(osthread != NULL, "os::free_thread but osthread not set");
1260
1261
1262 // We are told to free resources of the argument thread,
1263 // but we can only really operate on the current thread.
1264 // The main thread must take the VMThread down synchronously
1265 // before the main thread exits and frees up CodeHeap
1266 guarantee((Thread::current()->osthread() == osthread
1267 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1268 if (Thread::current()->osthread() == osthread) {
1269 // Restore caller's signal mask
1270 sigset_t sigmask = osthread->caller_sigmask();
1271 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1272 }
1273 delete osthread;
1274 }
1275
1276 void os::pd_start_thread(Thread* thread) {
1277 int status = thr_continue(thread->osthread()->thread_id());
1278 assert_status(status == 0, status, "thr_continue failed");
1279 }
1280
1281
1282 intx os::current_thread_id() {
1283 return (intx)thr_self();
1284 }
1285
1286 static pid_t _initial_pid = 0;
1287
1288 int os::current_process_id() {
1289 return (int)(_initial_pid ? _initial_pid : getpid());
1290 }
1291
1292 int os::allocate_thread_local_storage() {
1293 // %%% in Win32 this allocates a memory segment pointed to by a
1294 // register. Dan Stein can implement a similar feature in
1295 // Solaris. Alternatively, the VM can do the same thing
1296 // explicitly: malloc some storage and keep the pointer in a
1297 // register (which is part of the thread's context) (or keep it
1298 // in TLS).
1299 // %%% In current versions of Solaris, thr_self and TSD can
1300 // be accessed via short sequences of displaced indirections.
1301 // The value of thr_self is available as %g7(36).
1302 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1303 // assuming that the current thread already has a value bound to k.
1304 // It may be worth experimenting with such access patterns,
1305 // and later having the parameters formally exported from a Solaris
1306 // interface. I think, however, that it will be faster to
1307 // maintain the invariant that %g2 always contains the
1308 // JavaThread in Java code, and have stubs simply
1309 // treat %g2 as a caller-save register, preserving it in a %lN.
1310 thread_key_t tk;
1311 if (thr_keycreate(&tk, NULL)) {
1312 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1313 "(%s)", strerror(errno)));
1314 }
1315 return int(tk);
1316 }
1317
1318 void os::free_thread_local_storage(int index) {
1319 // %%% don't think we need anything here
1320 // if (pthread_key_delete((pthread_key_t) tk)) {
1321 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1322 // }
1323 }
1324
1325 // libthread allocate for tsd_common is a version specific
1326 // small number - point is NO swap space available
1327 #define SMALLINT 32
1328 void os::thread_local_storage_at_put(int index, void* value) {
1329 // %%% this is used only in threadLocalStorage.cpp
1330 if (thr_setspecific((thread_key_t)index, value)) {
1331 if (errno == ENOMEM) {
1332 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR,
1333 "thr_setspecific: out of swap space");
1334 } else {
1335 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1336 "(%s)", strerror(errno)));
1337 }
1338 } else {
1339 ThreadLocalStorage::set_thread_in_slot((Thread *) value);
1340 }
1341 }
1342
1343 // This function could be called before TLS is initialized, for example, when
1344 // VM receives an async signal or when VM causes a fatal error during
1345 // initialization. Return NULL if thr_getspecific() fails.
1346 void* os::thread_local_storage_at(int index) {
1347 // %%% this is used only in threadLocalStorage.cpp
1348 void* r = NULL;
1349 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1350 }
1351
1352
1353 // gethrtime() should be monotonic according to the documentation,
1354 // but some virtualized platforms are known to break this guarantee.
1355 // getTimeNanos() must be guaranteed not to move backwards, so we
1356 // are forced to add a check here.
1357 inline hrtime_t getTimeNanos() {
1358 const hrtime_t now = gethrtime();
1359 const hrtime_t prev = max_hrtime;
1360 if (now <= prev) {
1361 return prev; // same or retrograde time;
1362 }
1363 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1364 assert(obsv >= prev, "invariant"); // Monotonicity
1365 // If the CAS succeeded then we're done and return "now".
1366 // If the CAS failed and the observed value "obsv" is >= now then
1367 // we should return "obsv". If the CAS failed and now > obsv > prv then
1368 // some other thread raced this thread and installed a new value, in which case
1369 // we could either (a) retry the entire operation, (b) retry trying to install now
1370 // or (c) just return obsv. We use (c). No loop is required although in some cases
1371 // we might discard a higher "now" value in deference to a slightly lower but freshly
1372 // installed obsv value. That's entirely benign -- it admits no new orderings compared
1373 // to (a) or (b) -- and greatly reduces coherence traffic.
1374 // We might also condition (c) on the magnitude of the delta between obsv and now.
1375 // Avoiding excessive CAS operations to hot RW locations is critical.
1376 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate
1377 return (prev == obsv) ? now : obsv;
1378 }
1379
1380 // Time since start-up in seconds to a fine granularity.
1381 // Used by VMSelfDestructTimer and the MemProfiler.
1382 double os::elapsedTime() {
1383 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1384 }
1385
1386 jlong os::elapsed_counter() {
1387 return (jlong)(getTimeNanos() - first_hrtime);
1388 }
1389
1390 jlong os::elapsed_frequency() {
1391 return hrtime_hz;
1392 }
1393
1394 // Return the real, user, and system times in seconds from an
1395 // arbitrary fixed point in the past.
1396 bool os::getTimesSecs(double* process_real_time,
1397 double* process_user_time,
1398 double* process_system_time) {
1399 struct tms ticks;
1400 clock_t real_ticks = times(&ticks);
1401
1402 if (real_ticks == (clock_t) (-1)) {
1403 return false;
1404 } else {
1405 double ticks_per_second = (double) clock_tics_per_sec;
1406 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1407 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1408 // For consistency return the real time from getTimeNanos()
1409 // converted to seconds.
1410 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1411
1412 return true;
1413 }
1414 }
1415
1416 bool os::supports_vtime() { return true; }
1417
1418 bool os::enable_vtime() {
1419 int fd = ::open("/proc/self/ctl", O_WRONLY);
1420 if (fd == -1) {
1421 return false;
1422 }
1423
1424 long cmd[] = { PCSET, PR_MSACCT };
1425 int res = ::write(fd, cmd, sizeof(long) * 2);
1426 ::close(fd);
1427 if (res != sizeof(long) * 2) {
1428 return false;
1429 }
1430 return true;
1431 }
1432
1433 bool os::vtime_enabled() {
1434 int fd = ::open("/proc/self/status", O_RDONLY);
1435 if (fd == -1) {
1436 return false;
1437 }
1438
1439 pstatus_t status;
1440 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1441 ::close(fd);
1442 if (res != sizeof(pstatus_t)) {
1443 return false;
1444 }
1445 return status.pr_flags & PR_MSACCT;
1446 }
1447
1448 double os::elapsedVTime() {
1449 return (double)gethrvtime() / (double)hrtime_hz;
1450 }
1451
1452 // Used internally for comparisons only
1453 // getTimeMillis guaranteed to not move backwards on Solaris
1454 jlong getTimeMillis() {
1455 jlong nanotime = getTimeNanos();
1456 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1457 }
1458
1459 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1460 jlong os::javaTimeMillis() {
1461 timeval t;
1462 if (gettimeofday(&t, NULL) == -1) {
1463 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1464 }
1465 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1466 }
1467
1468 void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) {
1469 timeval t;
1470 if (gettimeofday(&t, NULL) == -1) {
1471 fatal(err_msg("os::javaTimeSystemUTC: gettimeofday (%s)", strerror(errno)));
1472 }
1473 seconds = jlong(t.tv_sec);
1474 nanos = jlong(t.tv_usec) * 1000;
1475 }
1476
1477
1478 jlong os::javaTimeNanos() {
1479 return (jlong)getTimeNanos();
1480 }
1481
1482 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1483 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1484 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1485 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1486 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1487 }
1488
1489 char * os::local_time_string(char *buf, size_t buflen) {
1490 struct tm t;
1491 time_t long_time;
1492 time(&long_time);
1493 localtime_r(&long_time, &t);
1494 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1495 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1496 t.tm_hour, t.tm_min, t.tm_sec);
1497 return buf;
1498 }
1499
1500 // Note: os::shutdown() might be called very early during initialization, or
1501 // called from signal handler. Before adding something to os::shutdown(), make
1502 // sure it is async-safe and can handle partially initialized VM.
1503 void os::shutdown() {
1504
1505 // allow PerfMemory to attempt cleanup of any persistent resources
1506 perfMemory_exit();
1507
1508 // needs to remove object in file system
1509 AttachListener::abort();
1510
1511 // flush buffered output, finish log files
1512 ostream_abort();
1513
1514 // Check for abort hook
1515 abort_hook_t abort_hook = Arguments::abort_hook();
1516 if (abort_hook != NULL) {
1517 abort_hook();
1518 }
1519 }
1520
1521 // Note: os::abort() might be called very early during initialization, or
1522 // called from signal handler. Before adding something to os::abort(), make
1523 // sure it is async-safe and can handle partially initialized VM.
1524 void os::abort(bool dump_core) {
1525 abort(dump_core, NULL, NULL);
1526 }
1527
1528 void os::abort(bool dump_core, void* siginfo, void* context) {
1529 os::shutdown();
1530 if (dump_core) {
1531 #ifndef PRODUCT
1532 fdStream out(defaultStream::output_fd());
1533 out.print_raw("Current thread is ");
1534 char buf[16];
1535 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1536 out.print_raw_cr(buf);
1537 out.print_raw_cr("Dumping core ...");
1538 #endif
1539 ::abort(); // dump core (for debugging)
1540 }
1541
1542 ::exit(1);
1543 }
1544
1545 // Die immediately, no exit hook, no abort hook, no cleanup.
1546 void os::die() {
1547 ::abort(); // dump core (for debugging)
1548 }
1549
1550 // DLL functions
1551
1552 const char* os::dll_file_extension() { return ".so"; }
1553
1554 // This must be hard coded because it's the system's temporary
1555 // directory not the java application's temp directory, ala java.io.tmpdir.
1556 const char* os::get_temp_directory() { return "/tmp"; }
1557
1558 static bool file_exists(const char* filename) {
1559 struct stat statbuf;
1560 if (filename == NULL || strlen(filename) == 0) {
1561 return false;
1562 }
1563 return os::stat(filename, &statbuf) == 0;
1564 }
1565
1566 bool os::dll_build_name(char* buffer, size_t buflen,
1567 const char* pname, const char* fname) {
1568 bool retval = false;
1569 const size_t pnamelen = pname ? strlen(pname) : 0;
1570
1571 // Return error on buffer overflow.
1572 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1573 return retval;
1574 }
1575
1576 if (pnamelen == 0) {
1577 snprintf(buffer, buflen, "lib%s.so", fname);
1578 retval = true;
1579 } else if (strchr(pname, *os::path_separator()) != NULL) {
1580 int n;
1581 char** pelements = split_path(pname, &n);
1582 if (pelements == NULL) {
1583 return false;
1584 }
1585 for (int i = 0; i < n; i++) {
1586 // really shouldn't be NULL but what the heck, check can't hurt
1587 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1588 continue; // skip the empty path values
1589 }
1590 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1591 if (file_exists(buffer)) {
1592 retval = true;
1593 break;
1594 }
1595 }
1596 // release the storage
1597 for (int i = 0; i < n; i++) {
1598 if (pelements[i] != NULL) {
1599 FREE_C_HEAP_ARRAY(char, pelements[i]);
1600 }
1601 }
1602 if (pelements != NULL) {
1603 FREE_C_HEAP_ARRAY(char*, pelements);
1604 }
1605 } else {
1606 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1607 retval = true;
1608 }
1609 return retval;
1610 }
1611
1612 // check if addr is inside libjvm.so
1613 bool os::address_is_in_vm(address addr) {
1614 static address libjvm_base_addr;
1615 Dl_info dlinfo;
1616
1617 if (libjvm_base_addr == NULL) {
1618 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
1619 libjvm_base_addr = (address)dlinfo.dli_fbase;
1620 }
1621 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1622 }
1623
1624 if (dladdr((void *)addr, &dlinfo) != 0) {
1625 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1626 }
1627
1628 return false;
1629 }
1630
1631 typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int);
1632 static dladdr1_func_type dladdr1_func = NULL;
1633
1634 bool os::dll_address_to_function_name(address addr, char *buf,
1635 int buflen, int * offset) {
1636 // buf is not optional, but offset is optional
1637 assert(buf != NULL, "sanity check");
1638
1639 Dl_info dlinfo;
1640
1641 // dladdr1_func was initialized in os::init()
1642 if (dladdr1_func != NULL) {
1643 // yes, we have dladdr1
1644
1645 // Support for dladdr1 is checked at runtime; it may be
1646 // available even if the vm is built on a machine that does
1647 // not have dladdr1 support. Make sure there is a value for
1648 // RTLD_DL_SYMENT.
1649 #ifndef RTLD_DL_SYMENT
1650 #define RTLD_DL_SYMENT 1
1651 #endif
1652 #ifdef _LP64
1653 Elf64_Sym * info;
1654 #else
1655 Elf32_Sym * info;
1656 #endif
1657 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1658 RTLD_DL_SYMENT) != 0) {
1659 // see if we have a matching symbol that covers our address
1660 if (dlinfo.dli_saddr != NULL &&
1661 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1662 if (dlinfo.dli_sname != NULL) {
1663 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1664 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1665 }
1666 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1667 return true;
1668 }
1669 }
1670 // no matching symbol so try for just file info
1671 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1672 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1673 buf, buflen, offset, dlinfo.dli_fname)) {
1674 return true;
1675 }
1676 }
1677 }
1678 buf[0] = '\0';
1679 if (offset != NULL) *offset = -1;
1680 return false;
1681 }
1682
1683 // no, only dladdr is available
1684 if (dladdr((void *)addr, &dlinfo) != 0) {
1685 // see if we have a matching symbol
1686 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
1687 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1688 jio_snprintf(buf, buflen, dlinfo.dli_sname);
1689 }
1690 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1691 return true;
1692 }
1693 // no matching symbol so try for just file info
1694 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1695 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1696 buf, buflen, offset, dlinfo.dli_fname)) {
1697 return true;
1698 }
1699 }
1700 }
1701 buf[0] = '\0';
1702 if (offset != NULL) *offset = -1;
1703 return false;
1704 }
1705
1706 bool os::dll_address_to_library_name(address addr, char* buf,
1707 int buflen, int* offset) {
1708 // buf is not optional, but offset is optional
1709 assert(buf != NULL, "sanity check");
1710
1711 Dl_info dlinfo;
1712
1713 if (dladdr((void*)addr, &dlinfo) != 0) {
1714 if (dlinfo.dli_fname != NULL) {
1715 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1716 }
1717 if (dlinfo.dli_fbase != NULL && offset != NULL) {
1718 *offset = addr - (address)dlinfo.dli_fbase;
1719 }
1720 return true;
1721 }
1722
1723 buf[0] = '\0';
1724 if (offset) *offset = -1;
1725 return false;
1726 }
1727
1728 int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) {
1729 Dl_info dli;
1730 // Sanity check?
1731 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 ||
1732 dli.dli_fname == NULL) {
1733 return 1;
1734 }
1735
1736 void * handle = dlopen(dli.dli_fname, RTLD_LAZY);
1737 if (handle == NULL) {
1738 return 1;
1739 }
1740
1741 Link_map *map;
1742 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1743 if (map == NULL) {
1744 dlclose(handle);
1745 return 1;
1746 }
1747
1748 while (map->l_prev != NULL) {
1749 map = map->l_prev;
1750 }
1751
1752 while (map != NULL) {
1753 // Iterate through all map entries and call callback with fields of interest
1754 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) {
1755 dlclose(handle);
1756 return 1;
1757 }
1758 map = map->l_next;
1759 }
1760
1761 dlclose(handle);
1762 return 0;
1763 }
1764
1765 int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) {
1766 outputStream * out = (outputStream *) param;
1767 out->print_cr(PTR_FORMAT " \t%s", base_address, name);
1768 return 0;
1769 }
1770
1771 void os::print_dll_info(outputStream * st) {
1772 st->print_cr("Dynamic libraries:"); st->flush();
1773 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) {
1774 st->print_cr("Error: Cannot print dynamic libraries.");
1775 }
1776 }
1777
1778 // Loads .dll/.so and
1779 // in case of error it checks if .dll/.so was built for the
1780 // same architecture as Hotspot is running on
1781
1782 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
1783 void * result= ::dlopen(filename, RTLD_LAZY);
1784 if (result != NULL) {
1785 // Successful loading
1786 return result;
1787 }
1788
1789 Elf32_Ehdr elf_head;
1790
1791 // Read system error message into ebuf
1792 // It may or may not be overwritten below
1793 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
1794 ebuf[ebuflen-1]='\0';
1795 int diag_msg_max_length=ebuflen-strlen(ebuf);
1796 char* diag_msg_buf=ebuf+strlen(ebuf);
1797
1798 if (diag_msg_max_length==0) {
1799 // No more space in ebuf for additional diagnostics message
1800 return NULL;
1801 }
1802
1803
1804 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1805
1806 if (file_descriptor < 0) {
1807 // Can't open library, report dlerror() message
1808 return NULL;
1809 }
1810
1811 bool failed_to_read_elf_head=
1812 (sizeof(elf_head)!=
1813 (::read(file_descriptor, &elf_head,sizeof(elf_head))));
1814
1815 ::close(file_descriptor);
1816 if (failed_to_read_elf_head) {
1817 // file i/o error - report dlerror() msg
1818 return NULL;
1819 }
1820
1821 typedef struct {
1822 Elf32_Half code; // Actual value as defined in elf.h
1823 Elf32_Half compat_class; // Compatibility of archs at VM's sense
1824 char elf_class; // 32 or 64 bit
1825 char endianess; // MSB or LSB
1826 char* name; // String representation
1827 } arch_t;
1828
1829 static const arch_t arch_array[]={
1830 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1831 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1832 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
1833 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
1834 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1835 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1836 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
1837 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
1838 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
1839 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
1840 };
1841
1842 #if (defined IA32)
1843 static Elf32_Half running_arch_code=EM_386;
1844 #elif (defined AMD64)
1845 static Elf32_Half running_arch_code=EM_X86_64;
1846 #elif (defined IA64)
1847 static Elf32_Half running_arch_code=EM_IA_64;
1848 #elif (defined __sparc) && (defined _LP64)
1849 static Elf32_Half running_arch_code=EM_SPARCV9;
1850 #elif (defined __sparc) && (!defined _LP64)
1851 static Elf32_Half running_arch_code=EM_SPARC;
1852 #elif (defined __powerpc64__)
1853 static Elf32_Half running_arch_code=EM_PPC64;
1854 #elif (defined __powerpc__)
1855 static Elf32_Half running_arch_code=EM_PPC;
1856 #elif (defined ARM)
1857 static Elf32_Half running_arch_code=EM_ARM;
1858 #else
1859 #error Method os::dll_load requires that one of following is defined:\
1860 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
1861 #endif
1862
1863 // Identify compatability class for VM's architecture and library's architecture
1864 // Obtain string descriptions for architectures
1865
1866 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
1867 int running_arch_index=-1;
1868
1869 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) {
1870 if (running_arch_code == arch_array[i].code) {
1871 running_arch_index = i;
1872 }
1873 if (lib_arch.code == arch_array[i].code) {
1874 lib_arch.compat_class = arch_array[i].compat_class;
1875 lib_arch.name = arch_array[i].name;
1876 }
1877 }
1878
1879 assert(running_arch_index != -1,
1880 "Didn't find running architecture code (running_arch_code) in arch_array");
1881 if (running_arch_index == -1) {
1882 // Even though running architecture detection failed
1883 // we may still continue with reporting dlerror() message
1884 return NULL;
1885 }
1886
1887 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
1888 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
1889 return NULL;
1890 }
1891
1892 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
1893 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
1894 return NULL;
1895 }
1896
1897 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
1898 if (lib_arch.name!=NULL) {
1899 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1900 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
1901 lib_arch.name, arch_array[running_arch_index].name);
1902 } else {
1903 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1904 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
1905 lib_arch.code,
1906 arch_array[running_arch_index].name);
1907 }
1908 }
1909
1910 return NULL;
1911 }
1912
1913 void* os::dll_lookup(void* handle, const char* name) {
1914 return dlsym(handle, name);
1915 }
1916
1917 void* os::get_default_process_handle() {
1918 return (void*)::dlopen(NULL, RTLD_LAZY);
1919 }
1920
1921 int os::stat(const char *path, struct stat *sbuf) {
1922 char pathbuf[MAX_PATH];
1923 if (strlen(path) > MAX_PATH - 1) {
1924 errno = ENAMETOOLONG;
1925 return -1;
1926 }
1927 os::native_path(strcpy(pathbuf, path));
1928 return ::stat(pathbuf, sbuf);
1929 }
1930
1931 static bool _print_ascii_file(const char* filename, outputStream* st) {
1932 int fd = ::open(filename, O_RDONLY);
1933 if (fd == -1) {
1934 return false;
1935 }
1936
1937 char buf[32];
1938 int bytes;
1939 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
1940 st->print_raw(buf, bytes);
1941 }
1942
1943 ::close(fd);
1944
1945 return true;
1946 }
1947
1948 void os::print_os_info_brief(outputStream* st) {
1949 os::Solaris::print_distro_info(st);
1950
1951 os::Posix::print_uname_info(st);
1952
1953 os::Solaris::print_libversion_info(st);
1954 }
1955
1956 void os::print_os_info(outputStream* st) {
1957 st->print("OS:");
1958
1959 os::Solaris::print_distro_info(st);
1960
1961 os::Posix::print_uname_info(st);
1962
1963 os::Solaris::print_libversion_info(st);
1964
1965 os::Posix::print_rlimit_info(st);
1966
1967 os::Posix::print_load_average(st);
1968 }
1969
1970 void os::Solaris::print_distro_info(outputStream* st) {
1971 if (!_print_ascii_file("/etc/release", st)) {
1972 st->print("Solaris");
1973 }
1974 st->cr();
1975 }
1976
1977 void os::Solaris::print_libversion_info(outputStream* st) {
1978 st->print(" (T2 libthread)");
1979 st->cr();
1980 }
1981
1982 static bool check_addr0(outputStream* st) {
1983 jboolean status = false;
1984 int fd = ::open("/proc/self/map",O_RDONLY);
1985 if (fd >= 0) {
1986 prmap_t p;
1987 while (::read(fd, &p, sizeof(p)) > 0) {
1988 if (p.pr_vaddr == 0x0) {
1989 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
1990 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
1991 st->print("Access:");
1992 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
1993 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
1994 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
1995 st->cr();
1996 status = true;
1997 }
1998 }
1999 ::close(fd);
2000 }
2001 return status;
2002 }
2003
2004 void os::pd_print_cpu_info(outputStream* st) {
2005 // Nothing to do for now.
2006 }
2007
2008 void os::print_memory_info(outputStream* st) {
2009 st->print("Memory:");
2010 st->print(" %dk page", os::vm_page_size()>>10);
2011 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2012 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2013 st->cr();
2014 (void) check_addr0(st);
2015 }
2016
2017 void os::print_siginfo(outputStream* st, void* siginfo) {
2018 const siginfo_t* si = (const siginfo_t*)siginfo;
2019
2020 os::Posix::print_siginfo_brief(st, si);
2021
2022 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2023 UseSharedSpaces) {
2024 FileMapInfo* mapinfo = FileMapInfo::current_info();
2025 if (mapinfo->is_in_shared_space(si->si_addr)) {
2026 st->print("\n\nError accessing class data sharing archive." \
2027 " Mapped file inaccessible during execution, " \
2028 " possible disk/network problem.");
2029 }
2030 }
2031 st->cr();
2032 }
2033
2034 // Moved from whole group, because we need them here for diagnostic
2035 // prints.
2036 #define OLDMAXSIGNUM 32
2037 static int Maxsignum = 0;
2038 static int *ourSigFlags = NULL;
2039
2040 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2041
2042 int os::Solaris::get_our_sigflags(int sig) {
2043 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2044 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2045 return ourSigFlags[sig];
2046 }
2047
2048 void os::Solaris::set_our_sigflags(int sig, int flags) {
2049 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2050 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2051 ourSigFlags[sig] = flags;
2052 }
2053
2054
2055 static const char* get_signal_handler_name(address handler,
2056 char* buf, int buflen) {
2057 int offset;
2058 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2059 if (found) {
2060 // skip directory names
2061 const char *p1, *p2;
2062 p1 = buf;
2063 size_t len = strlen(os::file_separator());
2064 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2065 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2066 } else {
2067 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2068 }
2069 return buf;
2070 }
2071
2072 static void print_signal_handler(outputStream* st, int sig,
2073 char* buf, size_t buflen) {
2074 struct sigaction sa;
2075
2076 sigaction(sig, NULL, &sa);
2077
2078 st->print("%s: ", os::exception_name(sig, buf, buflen));
2079
2080 address handler = (sa.sa_flags & SA_SIGINFO)
2081 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2082 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2083
2084 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2085 st->print("SIG_DFL");
2086 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2087 st->print("SIG_IGN");
2088 } else {
2089 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2090 }
2091
2092 st->print(", sa_mask[0]=");
2093 os::Posix::print_signal_set_short(st, &sa.sa_mask);
2094
2095 address rh = VMError::get_resetted_sighandler(sig);
2096 // May be, handler was resetted by VMError?
2097 if (rh != NULL) {
2098 handler = rh;
2099 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2100 }
2101
2102 st->print(", sa_flags=");
2103 os::Posix::print_sa_flags(st, sa.sa_flags);
2104
2105 // Check: is it our handler?
2106 if (handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2107 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2108 // It is our signal handler
2109 // check for flags
2110 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2111 st->print(
2112 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2113 os::Solaris::get_our_sigflags(sig));
2114 }
2115 }
2116 st->cr();
2117 }
2118
2119 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2120 st->print_cr("Signal Handlers:");
2121 print_signal_handler(st, SIGSEGV, buf, buflen);
2122 print_signal_handler(st, SIGBUS , buf, buflen);
2123 print_signal_handler(st, SIGFPE , buf, buflen);
2124 print_signal_handler(st, SIGPIPE, buf, buflen);
2125 print_signal_handler(st, SIGXFSZ, buf, buflen);
2126 print_signal_handler(st, SIGILL , buf, buflen);
2127 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2128 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2129 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2130 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2131 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2132 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2133 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2134 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2135 }
2136
2137 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2138
2139 // Find the full path to the current module, libjvm.so
2140 void os::jvm_path(char *buf, jint buflen) {
2141 // Error checking.
2142 if (buflen < MAXPATHLEN) {
2143 assert(false, "must use a large-enough buffer");
2144 buf[0] = '\0';
2145 return;
2146 }
2147 // Lazy resolve the path to current module.
2148 if (saved_jvm_path[0] != 0) {
2149 strcpy(buf, saved_jvm_path);
2150 return;
2151 }
2152
2153 Dl_info dlinfo;
2154 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2155 assert(ret != 0, "cannot locate libjvm");
2156 if (ret != 0 && dlinfo.dli_fname != NULL) {
2157 realpath((char *)dlinfo.dli_fname, buf);
2158 } else {
2159 buf[0] = '\0';
2160 return;
2161 }
2162
2163 if (Arguments::sun_java_launcher_is_altjvm()) {
2164 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical
2165 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".
2166 // If "/jre/lib/" appears at the right place in the string, then
2167 // assume we are installed in a JDK and we're done. Otherwise, check
2168 // for a JAVA_HOME environment variable and fix up the path so it
2169 // looks like libjvm.so is installed there (append a fake suffix
2170 // hotspot/libjvm.so).
2171 const char *p = buf + strlen(buf) - 1;
2172 for (int count = 0; p > buf && count < 5; ++count) {
2173 for (--p; p > buf && *p != '/'; --p)
2174 /* empty */ ;
2175 }
2176
2177 if (strncmp(p, "/jre/lib/", 9) != 0) {
2178 // Look for JAVA_HOME in the environment.
2179 char* java_home_var = ::getenv("JAVA_HOME");
2180 if (java_home_var != NULL && java_home_var[0] != 0) {
2181 char cpu_arch[12];
2182 char* jrelib_p;
2183 int len;
2184 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2185 #ifdef _LP64
2186 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2187 if (strcmp(cpu_arch, "sparc") == 0) {
2188 strcat(cpu_arch, "v9");
2189 } else if (strcmp(cpu_arch, "i386") == 0) {
2190 strcpy(cpu_arch, "amd64");
2191 }
2192 #endif
2193 // Check the current module name "libjvm.so".
2194 p = strrchr(buf, '/');
2195 assert(strstr(p, "/libjvm") == p, "invalid library name");
2196
2197 realpath(java_home_var, buf);
2198 // determine if this is a legacy image or modules image
2199 // modules image doesn't have "jre" subdirectory
2200 len = strlen(buf);
2201 assert(len < buflen, "Ran out of buffer space");
2202 jrelib_p = buf + len;
2203 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2204 if (0 != access(buf, F_OK)) {
2205 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2206 }
2207
2208 if (0 == access(buf, F_OK)) {
2209 // Use current module name "libjvm.so"
2210 len = strlen(buf);
2211 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
2212 } else {
2213 // Go back to path of .so
2214 realpath((char *)dlinfo.dli_fname, buf);
2215 }
2216 }
2217 }
2218 }
2219
2220 strncpy(saved_jvm_path, buf, MAXPATHLEN);
2221 saved_jvm_path[MAXPATHLEN - 1] = '\0';
2222 }
2223
2224
2225 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2226 // no prefix required, not even "_"
2227 }
2228
2229
2230 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2231 // no suffix required
2232 }
2233
2234 // This method is a copy of JDK's sysGetLastErrorString
2235 // from src/solaris/hpi/src/system_md.c
2236
2237 size_t os::lasterror(char *buf, size_t len) {
2238 if (errno == 0) return 0;
2239
2240 const char *s = ::strerror(errno);
2241 size_t n = ::strlen(s);
2242 if (n >= len) {
2243 n = len - 1;
2244 }
2245 ::strncpy(buf, s, n);
2246 buf[n] = '\0';
2247 return n;
2248 }
2249
2250
2251 // sun.misc.Signal
2252
2253 extern "C" {
2254 static void UserHandler(int sig, void *siginfo, void *context) {
2255 // Ctrl-C is pressed during error reporting, likely because the error
2256 // handler fails to abort. Let VM die immediately.
2257 if (sig == SIGINT && is_error_reported()) {
2258 os::die();
2259 }
2260
2261 os::signal_notify(sig);
2262 // We do not need to reinstate the signal handler each time...
2263 }
2264 }
2265
2266 void* os::user_handler() {
2267 return CAST_FROM_FN_PTR(void*, UserHandler);
2268 }
2269
2270 struct timespec PosixSemaphore::create_timespec(unsigned int sec, int nsec) {
2271 struct timespec ts;
2272 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec);
2273
2274 return ts;
2275 }
2276
2277 extern "C" {
2278 typedef void (*sa_handler_t)(int);
2279 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2280 }
2281
2282 void* os::signal(int signal_number, void* handler) {
2283 struct sigaction sigAct, oldSigAct;
2284 sigfillset(&(sigAct.sa_mask));
2285 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2286 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2287
2288 if (sigaction(signal_number, &sigAct, &oldSigAct)) {
2289 // -1 means registration failed
2290 return (void *)-1;
2291 }
2292
2293 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2294 }
2295
2296 void os::signal_raise(int signal_number) {
2297 raise(signal_number);
2298 }
2299
2300 // The following code is moved from os.cpp for making this
2301 // code platform specific, which it is by its very nature.
2302
2303 // a counter for each possible signal value
2304 static int Sigexit = 0;
2305 static int Maxlibjsigsigs;
2306 static jint *pending_signals = NULL;
2307 static int *preinstalled_sigs = NULL;
2308 static struct sigaction *chainedsigactions = NULL;
2309 static sema_t sig_sem;
2310 typedef int (*version_getting_t)();
2311 version_getting_t os::Solaris::get_libjsig_version = NULL;
2312 static int libjsigversion = NULL;
2313
2314 int os::sigexitnum_pd() {
2315 assert(Sigexit > 0, "signal memory not yet initialized");
2316 return Sigexit;
2317 }
2318
2319 void os::Solaris::init_signal_mem() {
2320 // Initialize signal structures
2321 Maxsignum = SIGRTMAX;
2322 Sigexit = Maxsignum+1;
2323 assert(Maxsignum >0, "Unable to obtain max signal number");
2324
2325 Maxlibjsigsigs = Maxsignum;
2326
2327 // pending_signals has one int per signal
2328 // The additional signal is for SIGEXIT - exit signal to signal_thread
2329 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2330 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2331
2332 if (UseSignalChaining) {
2333 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2334 * (Maxsignum + 1), mtInternal);
2335 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2336 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2337 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2338 }
2339 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2340 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2341 }
2342
2343 void os::signal_init_pd() {
2344 int ret;
2345
2346 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2347 assert(ret == 0, "sema_init() failed");
2348 }
2349
2350 void os::signal_notify(int signal_number) {
2351 int ret;
2352
2353 Atomic::inc(&pending_signals[signal_number]);
2354 ret = ::sema_post(&sig_sem);
2355 assert(ret == 0, "sema_post() failed");
2356 }
2357
2358 static int check_pending_signals(bool wait_for_signal) {
2359 int ret;
2360 while (true) {
2361 for (int i = 0; i < Sigexit + 1; i++) {
2362 jint n = pending_signals[i];
2363 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2364 return i;
2365 }
2366 }
2367 if (!wait_for_signal) {
2368 return -1;
2369 }
2370 JavaThread *thread = JavaThread::current();
2371 ThreadBlockInVM tbivm(thread);
2372
2373 bool threadIsSuspended;
2374 do {
2375 thread->set_suspend_equivalent();
2376 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2377 while ((ret = ::sema_wait(&sig_sem)) == EINTR)
2378 ;
2379 assert(ret == 0, "sema_wait() failed");
2380
2381 // were we externally suspended while we were waiting?
2382 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2383 if (threadIsSuspended) {
2384 // The semaphore has been incremented, but while we were waiting
2385 // another thread suspended us. We don't want to continue running
2386 // while suspended because that would surprise the thread that
2387 // suspended us.
2388 ret = ::sema_post(&sig_sem);
2389 assert(ret == 0, "sema_post() failed");
2390
2391 thread->java_suspend_self();
2392 }
2393 } while (threadIsSuspended);
2394 }
2395 }
2396
2397 int os::signal_lookup() {
2398 return check_pending_signals(false);
2399 }
2400
2401 int os::signal_wait() {
2402 return check_pending_signals(true);
2403 }
2404
2405 ////////////////////////////////////////////////////////////////////////////////
2406 // Virtual Memory
2407
2408 static int page_size = -1;
2409
2410 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2411 // clear this var if support is not available.
2412 static bool has_map_align = true;
2413
2414 int os::vm_page_size() {
2415 assert(page_size != -1, "must call os::init");
2416 return page_size;
2417 }
2418
2419 // Solaris allocates memory by pages.
2420 int os::vm_allocation_granularity() {
2421 assert(page_size != -1, "must call os::init");
2422 return page_size;
2423 }
2424
2425 static bool recoverable_mmap_error(int err) {
2426 // See if the error is one we can let the caller handle. This
2427 // list of errno values comes from the Solaris mmap(2) man page.
2428 switch (err) {
2429 case EBADF:
2430 case EINVAL:
2431 case ENOTSUP:
2432 // let the caller deal with these errors
2433 return true;
2434
2435 default:
2436 // Any remaining errors on this OS can cause our reserved mapping
2437 // to be lost. That can cause confusion where different data
2438 // structures think they have the same memory mapped. The worst
2439 // scenario is if both the VM and a library think they have the
2440 // same memory mapped.
2441 return false;
2442 }
2443 }
2444
2445 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec,
2446 int err) {
2447 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2448 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec,
2449 strerror(err), err);
2450 }
2451
2452 static void warn_fail_commit_memory(char* addr, size_t bytes,
2453 size_t alignment_hint, bool exec,
2454 int err) {
2455 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2456 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes,
2457 alignment_hint, exec, strerror(err), err);
2458 }
2459
2460 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) {
2461 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2462 size_t size = bytes;
2463 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2464 if (res != NULL) {
2465 if (UseNUMAInterleaving) {
2466 numa_make_global(addr, bytes);
2467 }
2468 return 0;
2469 }
2470
2471 int err = errno; // save errno from mmap() call in mmap_chunk()
2472
2473 if (!recoverable_mmap_error(err)) {
2474 warn_fail_commit_memory(addr, bytes, exec, err);
2475 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory.");
2476 }
2477
2478 return err;
2479 }
2480
2481 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2482 return Solaris::commit_memory_impl(addr, bytes, exec) == 0;
2483 }
2484
2485 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec,
2486 const char* mesg) {
2487 assert(mesg != NULL, "mesg must be specified");
2488 int err = os::Solaris::commit_memory_impl(addr, bytes, exec);
2489 if (err != 0) {
2490 // the caller wants all commit errors to exit with the specified mesg:
2491 warn_fail_commit_memory(addr, bytes, exec, err);
2492 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2493 }
2494 }
2495
2496 size_t os::Solaris::page_size_for_alignment(size_t alignment) {
2497 assert(is_size_aligned(alignment, (size_t) vm_page_size()),
2498 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT,
2499 alignment, (size_t) vm_page_size()));
2500
2501 for (int i = 0; _page_sizes[i] != 0; i++) {
2502 if (is_size_aligned(alignment, _page_sizes[i])) {
2503 return _page_sizes[i];
2504 }
2505 }
2506
2507 return (size_t) vm_page_size();
2508 }
2509
2510 int os::Solaris::commit_memory_impl(char* addr, size_t bytes,
2511 size_t alignment_hint, bool exec) {
2512 int err = Solaris::commit_memory_impl(addr, bytes, exec);
2513 if (err == 0 && UseLargePages && alignment_hint > 0) {
2514 assert(is_size_aligned(bytes, alignment_hint),
2515 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint));
2516
2517 // The syscall memcntl requires an exact page size (see man memcntl for details).
2518 size_t page_size = page_size_for_alignment(alignment_hint);
2519 if (page_size > (size_t) vm_page_size()) {
2520 (void)Solaris::setup_large_pages(addr, bytes, page_size);
2521 }
2522 }
2523 return err;
2524 }
2525
2526 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2527 bool exec) {
2528 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0;
2529 }
2530
2531 void os::pd_commit_memory_or_exit(char* addr, size_t bytes,
2532 size_t alignment_hint, bool exec,
2533 const char* mesg) {
2534 assert(mesg != NULL, "mesg must be specified");
2535 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec);
2536 if (err != 0) {
2537 // the caller wants all commit errors to exit with the specified mesg:
2538 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err);
2539 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2540 }
2541 }
2542
2543 // Uncommit the pages in a specified region.
2544 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2545 if (madvise(addr, bytes, MADV_FREE) < 0) {
2546 debug_only(warning("MADV_FREE failed."));
2547 return;
2548 }
2549 }
2550
2551 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2552 return os::commit_memory(addr, size, !ExecMem);
2553 }
2554
2555 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2556 return os::uncommit_memory(addr, size);
2557 }
2558
2559 // Change the page size in a given range.
2560 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2561 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2562 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2563 if (UseLargePages) {
2564 size_t page_size = Solaris::page_size_for_alignment(alignment_hint);
2565 if (page_size > (size_t) vm_page_size()) {
2566 Solaris::setup_large_pages(addr, bytes, page_size);
2567 }
2568 }
2569 }
2570
2571 // Tell the OS to make the range local to the first-touching LWP
2572 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2573 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2574 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2575 debug_only(warning("MADV_ACCESS_LWP failed."));
2576 }
2577 }
2578
2579 // Tell the OS that this range would be accessed from different LWPs.
2580 void os::numa_make_global(char *addr, size_t bytes) {
2581 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2582 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2583 debug_only(warning("MADV_ACCESS_MANY failed."));
2584 }
2585 }
2586
2587 // Get the number of the locality groups.
2588 size_t os::numa_get_groups_num() {
2589 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2590 return n != -1 ? n : 1;
2591 }
2592
2593 // Get a list of leaf locality groups. A leaf lgroup is group that
2594 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2595 // board. An LWP is assigned to one of these groups upon creation.
2596 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2597 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2598 ids[0] = 0;
2599 return 1;
2600 }
2601 int result_size = 0, top = 1, bottom = 0, cur = 0;
2602 for (int k = 0; k < size; k++) {
2603 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2604 (Solaris::lgrp_id_t*)&ids[top], size - top);
2605 if (r == -1) {
2606 ids[0] = 0;
2607 return 1;
2608 }
2609 if (!r) {
2610 // That's a leaf node.
2611 assert(bottom <= cur, "Sanity check");
2612 // Check if the node has memory
2613 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2614 NULL, 0, LGRP_RSRC_MEM) > 0) {
2615 ids[bottom++] = ids[cur];
2616 }
2617 }
2618 top += r;
2619 cur++;
2620 }
2621 if (bottom == 0) {
2622 // Handle a situation, when the OS reports no memory available.
2623 // Assume UMA architecture.
2624 ids[0] = 0;
2625 return 1;
2626 }
2627 return bottom;
2628 }
2629
2630 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2631 bool os::numa_topology_changed() {
2632 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2633 if (is_stale != -1 && is_stale) {
2634 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2635 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2636 assert(c != 0, "Failure to initialize LGRP API");
2637 Solaris::set_lgrp_cookie(c);
2638 return true;
2639 }
2640 return false;
2641 }
2642
2643 // Get the group id of the current LWP.
2644 int os::numa_get_group_id() {
2645 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2646 if (lgrp_id == -1) {
2647 return 0;
2648 }
2649 const int size = os::numa_get_groups_num();
2650 int *ids = (int*)alloca(size * sizeof(int));
2651
2652 // Get the ids of all lgroups with memory; r is the count.
2653 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2654 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2655 if (r <= 0) {
2656 return 0;
2657 }
2658 return ids[os::random() % r];
2659 }
2660
2661 // Request information about the page.
2662 bool os::get_page_info(char *start, page_info* info) {
2663 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2664 uint64_t addr = (uintptr_t)start;
2665 uint64_t outdata[2];
2666 uint_t validity = 0;
2667
2668 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2669 return false;
2670 }
2671
2672 info->size = 0;
2673 info->lgrp_id = -1;
2674
2675 if ((validity & 1) != 0) {
2676 if ((validity & 2) != 0) {
2677 info->lgrp_id = outdata[0];
2678 }
2679 if ((validity & 4) != 0) {
2680 info->size = outdata[1];
2681 }
2682 return true;
2683 }
2684 return false;
2685 }
2686
2687 // Scan the pages from start to end until a page different than
2688 // the one described in the info parameter is encountered.
2689 char *os::scan_pages(char *start, char* end, page_info* page_expected,
2690 page_info* page_found) {
2691 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2692 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2693 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1];
2694 uint_t validity[MAX_MEMINFO_CNT];
2695
2696 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2697 uint64_t p = (uint64_t)start;
2698 while (p < (uint64_t)end) {
2699 addrs[0] = p;
2700 size_t addrs_count = 1;
2701 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2702 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2703 addrs_count++;
2704 }
2705
2706 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2707 return NULL;
2708 }
2709
2710 size_t i = 0;
2711 for (; i < addrs_count; i++) {
2712 if ((validity[i] & 1) != 0) {
2713 if ((validity[i] & 4) != 0) {
2714 if (outdata[types * i + 1] != page_expected->size) {
2715 break;
2716 }
2717 } else if (page_expected->size != 0) {
2718 break;
2719 }
2720
2721 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2722 if (outdata[types * i] != page_expected->lgrp_id) {
2723 break;
2724 }
2725 }
2726 } else {
2727 return NULL;
2728 }
2729 }
2730
2731 if (i < addrs_count) {
2732 if ((validity[i] & 2) != 0) {
2733 page_found->lgrp_id = outdata[types * i];
2734 } else {
2735 page_found->lgrp_id = -1;
2736 }
2737 if ((validity[i] & 4) != 0) {
2738 page_found->size = outdata[types * i + 1];
2739 } else {
2740 page_found->size = 0;
2741 }
2742 return (char*)addrs[i];
2743 }
2744
2745 p = addrs[addrs_count - 1] + page_size;
2746 }
2747 return end;
2748 }
2749
2750 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2751 size_t size = bytes;
2752 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2753 // uncommitted page. Otherwise, the read/write might succeed if we
2754 // have enough swap space to back the physical page.
2755 return
2756 NULL != Solaris::mmap_chunk(addr, size,
2757 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2758 PROT_NONE);
2759 }
2760
2761 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2762 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2763
2764 if (b == MAP_FAILED) {
2765 return NULL;
2766 }
2767 return b;
2768 }
2769
2770 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes,
2771 size_t alignment_hint, bool fixed) {
2772 char* addr = requested_addr;
2773 int flags = MAP_PRIVATE | MAP_NORESERVE;
2774
2775 assert(!(fixed && (alignment_hint > 0)),
2776 "alignment hint meaningless with fixed mmap");
2777
2778 if (fixed) {
2779 flags |= MAP_FIXED;
2780 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
2781 flags |= MAP_ALIGN;
2782 addr = (char*) alignment_hint;
2783 }
2784
2785 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2786 // uncommitted page. Otherwise, the read/write might succeed if we
2787 // have enough swap space to back the physical page.
2788 return mmap_chunk(addr, bytes, flags, PROT_NONE);
2789 }
2790
2791 char* os::pd_reserve_memory(size_t bytes, char* requested_addr,
2792 size_t alignment_hint) {
2793 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint,
2794 (requested_addr != NULL));
2795
2796 guarantee(requested_addr == NULL || requested_addr == addr,
2797 "OS failed to return requested mmap address.");
2798 return addr;
2799 }
2800
2801 // Reserve memory at an arbitrary address, only if that area is
2802 // available (and not reserved for something else).
2803
2804 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2805 const int max_tries = 10;
2806 char* base[max_tries];
2807 size_t size[max_tries];
2808
2809 // Solaris adds a gap between mmap'ed regions. The size of the gap
2810 // is dependent on the requested size and the MMU. Our initial gap
2811 // value here is just a guess and will be corrected later.
2812 bool had_top_overlap = false;
2813 bool have_adjusted_gap = false;
2814 size_t gap = 0x400000;
2815
2816 // Assert only that the size is a multiple of the page size, since
2817 // that's all that mmap requires, and since that's all we really know
2818 // about at this low abstraction level. If we need higher alignment,
2819 // we can either pass an alignment to this method or verify alignment
2820 // in one of the methods further up the call chain. See bug 5044738.
2821 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
2822
2823 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
2824 // Give it a try, if the kernel honors the hint we can return immediately.
2825 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
2826
2827 volatile int err = errno;
2828 if (addr == requested_addr) {
2829 return addr;
2830 } else if (addr != NULL) {
2831 pd_unmap_memory(addr, bytes);
2832 }
2833
2834 if (PrintMiscellaneous && Verbose) {
2835 char buf[256];
2836 buf[0] = '\0';
2837 if (addr == NULL) {
2838 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
2839 }
2840 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
2841 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
2842 "%s", bytes, requested_addr, addr, buf);
2843 }
2844
2845 // Address hint method didn't work. Fall back to the old method.
2846 // In theory, once SNV becomes our oldest supported platform, this
2847 // code will no longer be needed.
2848 //
2849 // Repeatedly allocate blocks until the block is allocated at the
2850 // right spot. Give up after max_tries.
2851 int i;
2852 for (i = 0; i < max_tries; ++i) {
2853 base[i] = reserve_memory(bytes);
2854
2855 if (base[i] != NULL) {
2856 // Is this the block we wanted?
2857 if (base[i] == requested_addr) {
2858 size[i] = bytes;
2859 break;
2860 }
2861
2862 // check that the gap value is right
2863 if (had_top_overlap && !have_adjusted_gap) {
2864 size_t actual_gap = base[i-1] - base[i] - bytes;
2865 if (gap != actual_gap) {
2866 // adjust the gap value and retry the last 2 allocations
2867 assert(i > 0, "gap adjustment code problem");
2868 have_adjusted_gap = true; // adjust the gap only once, just in case
2869 gap = actual_gap;
2870 if (PrintMiscellaneous && Verbose) {
2871 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
2872 }
2873 unmap_memory(base[i], bytes);
2874 unmap_memory(base[i-1], size[i-1]);
2875 i-=2;
2876 continue;
2877 }
2878 }
2879
2880 // Does this overlap the block we wanted? Give back the overlapped
2881 // parts and try again.
2882 //
2883 // There is still a bug in this code: if top_overlap == bytes,
2884 // the overlap is offset from requested region by the value of gap.
2885 // In this case giving back the overlapped part will not work,
2886 // because we'll give back the entire block at base[i] and
2887 // therefore the subsequent allocation will not generate a new gap.
2888 // This could be fixed with a new algorithm that used larger
2889 // or variable size chunks to find the requested region -
2890 // but such a change would introduce additional complications.
2891 // It's rare enough that the planets align for this bug,
2892 // so we'll just wait for a fix for 6204603/5003415 which
2893 // will provide a mmap flag to allow us to avoid this business.
2894
2895 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
2896 if (top_overlap >= 0 && top_overlap < bytes) {
2897 had_top_overlap = true;
2898 unmap_memory(base[i], top_overlap);
2899 base[i] += top_overlap;
2900 size[i] = bytes - top_overlap;
2901 } else {
2902 size_t bottom_overlap = base[i] + bytes - requested_addr;
2903 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
2904 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
2905 warning("attempt_reserve_memory_at: possible alignment bug");
2906 }
2907 unmap_memory(requested_addr, bottom_overlap);
2908 size[i] = bytes - bottom_overlap;
2909 } else {
2910 size[i] = bytes;
2911 }
2912 }
2913 }
2914 }
2915
2916 // Give back the unused reserved pieces.
2917
2918 for (int j = 0; j < i; ++j) {
2919 if (base[j] != NULL) {
2920 unmap_memory(base[j], size[j]);
2921 }
2922 }
2923
2924 return (i < max_tries) ? requested_addr : NULL;
2925 }
2926
2927 bool os::pd_release_memory(char* addr, size_t bytes) {
2928 size_t size = bytes;
2929 return munmap(addr, size) == 0;
2930 }
2931
2932 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
2933 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
2934 "addr must be page aligned");
2935 int retVal = mprotect(addr, bytes, prot);
2936 return retVal == 0;
2937 }
2938
2939 // Protect memory (Used to pass readonly pages through
2940 // JNI GetArray<type>Elements with empty arrays.)
2941 // Also, used for serialization page and for compressed oops null pointer
2942 // checking.
2943 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
2944 bool is_committed) {
2945 unsigned int p = 0;
2946 switch (prot) {
2947 case MEM_PROT_NONE: p = PROT_NONE; break;
2948 case MEM_PROT_READ: p = PROT_READ; break;
2949 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
2950 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
2951 default:
2952 ShouldNotReachHere();
2953 }
2954 // is_committed is unused.
2955 return solaris_mprotect(addr, bytes, p);
2956 }
2957
2958 // guard_memory and unguard_memory only happens within stack guard pages.
2959 // Since ISM pertains only to the heap, guard and unguard memory should not
2960 /// happen with an ISM region.
2961 bool os::guard_memory(char* addr, size_t bytes) {
2962 return solaris_mprotect(addr, bytes, PROT_NONE);
2963 }
2964
2965 bool os::unguard_memory(char* addr, size_t bytes) {
2966 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
2967 }
2968
2969 // Large page support
2970 static size_t _large_page_size = 0;
2971
2972 // Insertion sort for small arrays (descending order).
2973 static void insertion_sort_descending(size_t* array, int len) {
2974 for (int i = 0; i < len; i++) {
2975 size_t val = array[i];
2976 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
2977 size_t tmp = array[key];
2978 array[key] = array[key - 1];
2979 array[key - 1] = tmp;
2980 }
2981 }
2982 }
2983
2984 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) {
2985 const unsigned int usable_count = VM_Version::page_size_count();
2986 if (usable_count == 1) {
2987 return false;
2988 }
2989
2990 // Find the right getpagesizes interface. When solaris 11 is the minimum
2991 // build platform, getpagesizes() (without the '2') can be called directly.
2992 typedef int (*gps_t)(size_t[], int);
2993 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
2994 if (gps_func == NULL) {
2995 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
2996 if (gps_func == NULL) {
2997 if (warn) {
2998 warning("MPSS is not supported by the operating system.");
2999 }
3000 return false;
3001 }
3002 }
3003
3004 // Fill the array of page sizes.
3005 int n = (*gps_func)(_page_sizes, page_sizes_max);
3006 assert(n > 0, "Solaris bug?");
3007
3008 if (n == page_sizes_max) {
3009 // Add a sentinel value (necessary only if the array was completely filled
3010 // since it is static (zeroed at initialization)).
3011 _page_sizes[--n] = 0;
3012 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3013 }
3014 assert(_page_sizes[n] == 0, "missing sentinel");
3015 trace_page_sizes("available page sizes", _page_sizes, n);
3016
3017 if (n == 1) return false; // Only one page size available.
3018
3019 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3020 // select up to usable_count elements. First sort the array, find the first
3021 // acceptable value, then copy the usable sizes to the top of the array and
3022 // trim the rest. Make sure to include the default page size :-).
3023 //
3024 // A better policy could get rid of the 4M limit by taking the sizes of the
3025 // important VM memory regions (java heap and possibly the code cache) into
3026 // account.
3027 insertion_sort_descending(_page_sizes, n);
3028 const size_t size_limit =
3029 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3030 int beg;
3031 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */;
3032 const int end = MIN2((int)usable_count, n) - 1;
3033 for (int cur = 0; cur < end; ++cur, ++beg) {
3034 _page_sizes[cur] = _page_sizes[beg];
3035 }
3036 _page_sizes[end] = vm_page_size();
3037 _page_sizes[end + 1] = 0;
3038
3039 if (_page_sizes[end] > _page_sizes[end - 1]) {
3040 // Default page size is not the smallest; sort again.
3041 insertion_sort_descending(_page_sizes, end + 1);
3042 }
3043 *page_size = _page_sizes[0];
3044
3045 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3046 return true;
3047 }
3048
3049 void os::large_page_init() {
3050 if (UseLargePages) {
3051 // print a warning if any large page related flag is specified on command line
3052 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3053 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3054
3055 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3056 }
3057 }
3058
3059 bool os::Solaris::is_valid_page_size(size_t bytes) {
3060 for (int i = 0; _page_sizes[i] != 0; i++) {
3061 if (_page_sizes[i] == bytes) {
3062 return true;
3063 }
3064 }
3065 return false;
3066 }
3067
3068 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) {
3069 assert(is_valid_page_size(align), err_msg(SIZE_FORMAT " is not a valid page size", align));
3070 assert(is_ptr_aligned((void*) start, align),
3071 err_msg(PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align));
3072 assert(is_size_aligned(bytes, align),
3073 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align));
3074
3075 // Signal to OS that we want large pages for addresses
3076 // from addr, addr + bytes
3077 struct memcntl_mha mpss_struct;
3078 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3079 mpss_struct.mha_pagesize = align;
3080 mpss_struct.mha_flags = 0;
3081 // Upon successful completion, memcntl() returns 0
3082 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) {
3083 debug_only(warning("Attempt to use MPSS failed."));
3084 return false;
3085 }
3086 return true;
3087 }
3088
3089 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) {
3090 fatal("os::reserve_memory_special should not be called on Solaris.");
3091 return NULL;
3092 }
3093
3094 bool os::release_memory_special(char* base, size_t bytes) {
3095 fatal("os::release_memory_special should not be called on Solaris.");
3096 return false;
3097 }
3098
3099 size_t os::large_page_size() {
3100 return _large_page_size;
3101 }
3102
3103 // MPSS allows application to commit large page memory on demand; with ISM
3104 // the entire memory region must be allocated as shared memory.
3105 bool os::can_commit_large_page_memory() {
3106 return true;
3107 }
3108
3109 bool os::can_execute_large_page_memory() {
3110 return true;
3111 }
3112
3113 // Read calls from inside the vm need to perform state transitions
3114 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3115 size_t res;
3116 JavaThread* thread = (JavaThread*)Thread::current();
3117 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3118 ThreadBlockInVM tbiv(thread);
3119 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3120 return res;
3121 }
3122
3123 size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) {
3124 size_t res;
3125 JavaThread* thread = (JavaThread*)Thread::current();
3126 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3127 ThreadBlockInVM tbiv(thread);
3128 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res);
3129 return res;
3130 }
3131
3132 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3133 size_t res;
3134 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
3135 "Assumed _thread_in_native");
3136 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3137 return res;
3138 }
3139
3140 void os::naked_short_sleep(jlong ms) {
3141 assert(ms < 1000, "Un-interruptable sleep, short time use only");
3142
3143 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but
3144 // Solaris requires -lrt for this.
3145 usleep((ms * 1000));
3146
3147 return;
3148 }
3149
3150 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3151 void os::infinite_sleep() {
3152 while (true) { // sleep forever ...
3153 ::sleep(100); // ... 100 seconds at a time
3154 }
3155 }
3156
3157 // Used to convert frequent JVM_Yield() to nops
3158 bool os::dont_yield() {
3159 if (DontYieldALot) {
3160 static hrtime_t last_time = 0;
3161 hrtime_t diff = getTimeNanos() - last_time;
3162
3163 if (diff < DontYieldALotInterval * 1000000) {
3164 return true;
3165 }
3166
3167 last_time += diff;
3168
3169 return false;
3170 } else {
3171 return false;
3172 }
3173 }
3174
3175 // Note that yield semantics are defined by the scheduling class to which
3176 // the thread currently belongs. Typically, yield will _not yield to
3177 // other equal or higher priority threads that reside on the dispatch queues
3178 // of other CPUs.
3179
3180 void os::naked_yield() {
3181 thr_yield();
3182 }
3183
3184 // Interface for setting lwp priorities. If we are using T2 libthread,
3185 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3186 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3187 // function is meaningless in this mode so we must adjust the real lwp's priority
3188 // The routines below implement the getting and setting of lwp priorities.
3189 //
3190 // Note: T2 is now the only supported libthread. UseBoundThreads flag is
3191 // being deprecated and all threads are now BoundThreads
3192 //
3193 // Note: There are three priority scales used on Solaris. Java priotities
3194 // which range from 1 to 10, libthread "thr_setprio" scale which range
3195 // from 0 to 127, and the current scheduling class of the process we
3196 // are running in. This is typically from -60 to +60.
3197 // The setting of the lwp priorities in done after a call to thr_setprio
3198 // so Java priorities are mapped to libthread priorities and we map from
3199 // the latter to lwp priorities. We don't keep priorities stored in
3200 // Java priorities since some of our worker threads want to set priorities
3201 // higher than all Java threads.
3202 //
3203 // For related information:
3204 // (1) man -s 2 priocntl
3205 // (2) man -s 4 priocntl
3206 // (3) man dispadmin
3207 // = librt.so
3208 // = libthread/common/rtsched.c - thrp_setlwpprio().
3209 // = ps -cL <pid> ... to validate priority.
3210 // = sched_get_priority_min and _max
3211 // pthread_create
3212 // sched_setparam
3213 // pthread_setschedparam
3214 //
3215 // Assumptions:
3216 // + We assume that all threads in the process belong to the same
3217 // scheduling class. IE. an homogenous process.
3218 // + Must be root or in IA group to change change "interactive" attribute.
3219 // Priocntl() will fail silently. The only indication of failure is when
3220 // we read-back the value and notice that it hasn't changed.
3221 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3222 // + For RT, change timeslice as well. Invariant:
3223 // constant "priority integral"
3224 // Konst == TimeSlice * (60-Priority)
3225 // Given a priority, compute appropriate timeslice.
3226 // + Higher numerical values have higher priority.
3227
3228 // sched class attributes
3229 typedef struct {
3230 int schedPolicy; // classID
3231 int maxPrio;
3232 int minPrio;
3233 } SchedInfo;
3234
3235
3236 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3237
3238 #ifdef ASSERT
3239 static int ReadBackValidate = 1;
3240 #endif
3241 static int myClass = 0;
3242 static int myMin = 0;
3243 static int myMax = 0;
3244 static int myCur = 0;
3245 static bool priocntl_enable = false;
3246
3247 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3248 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3249
3250
3251 // lwp_priocntl_init
3252 //
3253 // Try to determine the priority scale for our process.
3254 //
3255 // Return errno or 0 if OK.
3256 //
3257 static int lwp_priocntl_init() {
3258 int rslt;
3259 pcinfo_t ClassInfo;
3260 pcparms_t ParmInfo;
3261 int i;
3262
3263 if (!UseThreadPriorities) return 0;
3264
3265 // If ThreadPriorityPolicy is 1, switch tables
3266 if (ThreadPriorityPolicy == 1) {
3267 for (i = 0; i < CriticalPriority+1; i++)
3268 os::java_to_os_priority[i] = prio_policy1[i];
3269 }
3270 if (UseCriticalJavaThreadPriority) {
3271 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3272 // See set_native_priority() and set_lwp_class_and_priority().
3273 // Save original MaxPriority mapping in case attempt to
3274 // use critical priority fails.
3275 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3276 // Set negative to distinguish from other priorities
3277 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3278 }
3279
3280 // Get IDs for a set of well-known scheduling classes.
3281 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3282 // the system. We should have a loop that iterates over the
3283 // classID values, which are known to be "small" integers.
3284
3285 strcpy(ClassInfo.pc_clname, "TS");
3286 ClassInfo.pc_cid = -1;
3287 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3288 if (rslt < 0) return errno;
3289 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3290 tsLimits.schedPolicy = ClassInfo.pc_cid;
3291 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3292 tsLimits.minPrio = -tsLimits.maxPrio;
3293
3294 strcpy(ClassInfo.pc_clname, "IA");
3295 ClassInfo.pc_cid = -1;
3296 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3297 if (rslt < 0) return errno;
3298 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3299 iaLimits.schedPolicy = ClassInfo.pc_cid;
3300 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3301 iaLimits.minPrio = -iaLimits.maxPrio;
3302
3303 strcpy(ClassInfo.pc_clname, "RT");
3304 ClassInfo.pc_cid = -1;
3305 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3306 if (rslt < 0) return errno;
3307 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3308 rtLimits.schedPolicy = ClassInfo.pc_cid;
3309 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3310 rtLimits.minPrio = 0;
3311
3312 strcpy(ClassInfo.pc_clname, "FX");
3313 ClassInfo.pc_cid = -1;
3314 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3315 if (rslt < 0) return errno;
3316 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3317 fxLimits.schedPolicy = ClassInfo.pc_cid;
3318 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3319 fxLimits.minPrio = 0;
3320
3321 // Query our "current" scheduling class.
3322 // This will normally be IA, TS or, rarely, FX or RT.
3323 memset(&ParmInfo, 0, sizeof(ParmInfo));
3324 ParmInfo.pc_cid = PC_CLNULL;
3325 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3326 if (rslt < 0) return errno;
3327 myClass = ParmInfo.pc_cid;
3328
3329 // We now know our scheduling classId, get specific information
3330 // about the class.
3331 ClassInfo.pc_cid = myClass;
3332 ClassInfo.pc_clname[0] = 0;
3333 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3334 if (rslt < 0) return errno;
3335
3336 if (ThreadPriorityVerbose) {
3337 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3338 }
3339
3340 memset(&ParmInfo, 0, sizeof(pcparms_t));
3341 ParmInfo.pc_cid = PC_CLNULL;
3342 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3343 if (rslt < 0) return errno;
3344
3345 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3346 myMin = rtLimits.minPrio;
3347 myMax = rtLimits.maxPrio;
3348 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3349 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3350 myMin = iaLimits.minPrio;
3351 myMax = iaLimits.maxPrio;
3352 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3353 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3354 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3355 myMin = tsLimits.minPrio;
3356 myMax = tsLimits.maxPrio;
3357 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3358 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3359 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3360 myMin = fxLimits.minPrio;
3361 myMax = fxLimits.maxPrio;
3362 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3363 } else {
3364 // No clue - punt
3365 if (ThreadPriorityVerbose) {
3366 tty->print_cr("Unknown scheduling class: %s ... \n",
3367 ClassInfo.pc_clname);
3368 }
3369 return EINVAL; // no clue, punt
3370 }
3371
3372 if (ThreadPriorityVerbose) {
3373 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax);
3374 }
3375
3376 priocntl_enable = true; // Enable changing priorities
3377 return 0;
3378 }
3379
3380 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3381 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3382 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3383 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3384
3385
3386 // scale_to_lwp_priority
3387 //
3388 // Convert from the libthread "thr_setprio" scale to our current
3389 // lwp scheduling class scale.
3390 //
3391 static int scale_to_lwp_priority(int rMin, int rMax, int x) {
3392 int v;
3393
3394 if (x == 127) return rMax; // avoid round-down
3395 v = (((x*(rMax-rMin)))/128)+rMin;
3396 return v;
3397 }
3398
3399
3400 // set_lwp_class_and_priority
3401 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3402 int newPrio, int new_class, bool scale) {
3403 int rslt;
3404 int Actual, Expected, prv;
3405 pcparms_t ParmInfo; // for GET-SET
3406 #ifdef ASSERT
3407 pcparms_t ReadBack; // for readback
3408 #endif
3409
3410 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3411 // Query current values.
3412 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3413 // Cache "pcparms_t" in global ParmCache.
3414 // TODO: elide set-to-same-value
3415
3416 // If something went wrong on init, don't change priorities.
3417 if (!priocntl_enable) {
3418 if (ThreadPriorityVerbose) {
3419 tty->print_cr("Trying to set priority but init failed, ignoring");
3420 }
3421 return EINVAL;
3422 }
3423
3424 // If lwp hasn't started yet, just return
3425 // the _start routine will call us again.
3426 if (lwpid <= 0) {
3427 if (ThreadPriorityVerbose) {
3428 tty->print_cr("deferring the set_lwp_class_and_priority of thread "
3429 INTPTR_FORMAT " to %d, lwpid not set",
3430 ThreadID, newPrio);
3431 }
3432 return 0;
3433 }
3434
3435 if (ThreadPriorityVerbose) {
3436 tty->print_cr ("set_lwp_class_and_priority("
3437 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3438 ThreadID, lwpid, newPrio);
3439 }
3440
3441 memset(&ParmInfo, 0, sizeof(pcparms_t));
3442 ParmInfo.pc_cid = PC_CLNULL;
3443 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3444 if (rslt < 0) return errno;
3445
3446 int cur_class = ParmInfo.pc_cid;
3447 ParmInfo.pc_cid = (id_t)new_class;
3448
3449 if (new_class == rtLimits.schedPolicy) {
3450 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3451 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3452 rtLimits.maxPrio, newPrio)
3453 : newPrio;
3454 rtInfo->rt_tqsecs = RT_NOCHANGE;
3455 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3456 if (ThreadPriorityVerbose) {
3457 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3458 }
3459 } else if (new_class == iaLimits.schedPolicy) {
3460 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3461 int maxClamped = MIN2(iaLimits.maxPrio,
3462 cur_class == new_class
3463 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3464 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3465 maxClamped, newPrio)
3466 : newPrio;
3467 iaInfo->ia_uprilim = cur_class == new_class
3468 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3469 iaInfo->ia_mode = IA_NOCHANGE;
3470 if (ThreadPriorityVerbose) {
3471 tty->print_cr("IA: [%d...%d] %d->%d\n",
3472 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3473 }
3474 } else if (new_class == tsLimits.schedPolicy) {
3475 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3476 int maxClamped = MIN2(tsLimits.maxPrio,
3477 cur_class == new_class
3478 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3479 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3480 maxClamped, newPrio)
3481 : newPrio;
3482 tsInfo->ts_uprilim = cur_class == new_class
3483 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3484 if (ThreadPriorityVerbose) {
3485 tty->print_cr("TS: [%d...%d] %d->%d\n",
3486 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3487 }
3488 } else if (new_class == fxLimits.schedPolicy) {
3489 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3490 int maxClamped = MIN2(fxLimits.maxPrio,
3491 cur_class == new_class
3492 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3493 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3494 maxClamped, newPrio)
3495 : newPrio;
3496 fxInfo->fx_uprilim = cur_class == new_class
3497 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
3498 fxInfo->fx_tqsecs = FX_NOCHANGE;
3499 fxInfo->fx_tqnsecs = FX_NOCHANGE;
3500 if (ThreadPriorityVerbose) {
3501 tty->print_cr("FX: [%d...%d] %d->%d\n",
3502 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
3503 }
3504 } else {
3505 if (ThreadPriorityVerbose) {
3506 tty->print_cr("Unknown new scheduling class %d\n", new_class);
3507 }
3508 return EINVAL; // no clue, punt
3509 }
3510
3511 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3512 if (ThreadPriorityVerbose && rslt) {
3513 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3514 }
3515 if (rslt < 0) return errno;
3516
3517 #ifdef ASSERT
3518 // Sanity check: read back what we just attempted to set.
3519 // In theory it could have changed in the interim ...
3520 //
3521 // The priocntl system call is tricky.
3522 // Sometimes it'll validate the priority value argument and
3523 // return EINVAL if unhappy. At other times it fails silently.
3524 // Readbacks are prudent.
3525
3526 if (!ReadBackValidate) return 0;
3527
3528 memset(&ReadBack, 0, sizeof(pcparms_t));
3529 ReadBack.pc_cid = PC_CLNULL;
3530 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3531 assert(rslt >= 0, "priocntl failed");
3532 Actual = Expected = 0xBAD;
3533 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3534 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3535 Actual = RTPRI(ReadBack)->rt_pri;
3536 Expected = RTPRI(ParmInfo)->rt_pri;
3537 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3538 Actual = IAPRI(ReadBack)->ia_upri;
3539 Expected = IAPRI(ParmInfo)->ia_upri;
3540 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3541 Actual = TSPRI(ReadBack)->ts_upri;
3542 Expected = TSPRI(ParmInfo)->ts_upri;
3543 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3544 Actual = FXPRI(ReadBack)->fx_upri;
3545 Expected = FXPRI(ParmInfo)->fx_upri;
3546 } else {
3547 if (ThreadPriorityVerbose) {
3548 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
3549 ParmInfo.pc_cid);
3550 }
3551 }
3552
3553 if (Actual != Expected) {
3554 if (ThreadPriorityVerbose) {
3555 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3556 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3557 }
3558 }
3559 #endif
3560
3561 return 0;
3562 }
3563
3564 // Solaris only gives access to 128 real priorities at a time,
3565 // so we expand Java's ten to fill this range. This would be better
3566 // if we dynamically adjusted relative priorities.
3567 //
3568 // The ThreadPriorityPolicy option allows us to select 2 different
3569 // priority scales.
3570 //
3571 // ThreadPriorityPolicy=0
3572 // Since the Solaris' default priority is MaximumPriority, we do not
3573 // set a priority lower than Max unless a priority lower than
3574 // NormPriority is requested.
3575 //
3576 // ThreadPriorityPolicy=1
3577 // This mode causes the priority table to get filled with
3578 // linear values. NormPriority get's mapped to 50% of the
3579 // Maximum priority an so on. This will cause VM threads
3580 // to get unfair treatment against other Solaris processes
3581 // which do not explicitly alter their thread priorities.
3582
3583 int os::java_to_os_priority[CriticalPriority + 1] = {
3584 -99999, // 0 Entry should never be used
3585
3586 0, // 1 MinPriority
3587 32, // 2
3588 64, // 3
3589
3590 96, // 4
3591 127, // 5 NormPriority
3592 127, // 6
3593
3594 127, // 7
3595 127, // 8
3596 127, // 9 NearMaxPriority
3597
3598 127, // 10 MaxPriority
3599
3600 -criticalPrio // 11 CriticalPriority
3601 };
3602
3603 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3604 OSThread* osthread = thread->osthread();
3605
3606 // Save requested priority in case the thread hasn't been started
3607 osthread->set_native_priority(newpri);
3608
3609 // Check for critical priority request
3610 bool fxcritical = false;
3611 if (newpri == -criticalPrio) {
3612 fxcritical = true;
3613 newpri = criticalPrio;
3614 }
3615
3616 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3617 if (!UseThreadPriorities) return OS_OK;
3618
3619 int status = 0;
3620
3621 if (!fxcritical) {
3622 // Use thr_setprio only if we have a priority that thr_setprio understands
3623 status = thr_setprio(thread->osthread()->thread_id(), newpri);
3624 }
3625
3626 int lwp_status =
3627 set_lwp_class_and_priority(osthread->thread_id(),
3628 osthread->lwp_id(),
3629 newpri,
3630 fxcritical ? fxLimits.schedPolicy : myClass,
3631 !fxcritical);
3632 if (lwp_status != 0 && fxcritical) {
3633 // Try again, this time without changing the scheduling class
3634 newpri = java_MaxPriority_to_os_priority;
3635 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
3636 osthread->lwp_id(),
3637 newpri, myClass, false);
3638 }
3639 status |= lwp_status;
3640 return (status == 0) ? OS_OK : OS_ERR;
3641 }
3642
3643
3644 OSReturn os::get_native_priority(const Thread* const thread,
3645 int *priority_ptr) {
3646 int p;
3647 if (!UseThreadPriorities) {
3648 *priority_ptr = NormalPriority;
3649 return OS_OK;
3650 }
3651 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3652 if (status != 0) {
3653 return OS_ERR;
3654 }
3655 *priority_ptr = p;
3656 return OS_OK;
3657 }
3658
3659
3660 // Hint to the underlying OS that a task switch would not be good.
3661 // Void return because it's a hint and can fail.
3662 void os::hint_no_preempt() {
3663 schedctl_start(schedctl_init());
3664 }
3665
3666 static void resume_clear_context(OSThread *osthread) {
3667 osthread->set_ucontext(NULL);
3668 }
3669
3670 static void suspend_save_context(OSThread *osthread, ucontext_t* context) {
3671 osthread->set_ucontext(context);
3672 }
3673
3674 static PosixSemaphore sr_semaphore;
3675
3676 void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) {
3677 // Save and restore errno to avoid confusing native code with EINTR
3678 // after sigsuspend.
3679 int old_errno = errno;
3680
3681 OSThread* osthread = thread->osthread();
3682 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
3683
3684 os::SuspendResume::State current = osthread->sr.state();
3685 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
3686 suspend_save_context(osthread, uc);
3687
3688 // attempt to switch the state, we assume we had a SUSPEND_REQUEST
3689 os::SuspendResume::State state = osthread->sr.suspended();
3690 if (state == os::SuspendResume::SR_SUSPENDED) {
3691 sigset_t suspend_set; // signals for sigsuspend()
3692
3693 // get current set of blocked signals and unblock resume signal
3694 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set);
3695 sigdelset(&suspend_set, os::Solaris::SIGasync());
3696
3697 sr_semaphore.signal();
3698 // wait here until we are resumed
3699 while (1) {
3700 sigsuspend(&suspend_set);
3701
3702 os::SuspendResume::State result = osthread->sr.running();
3703 if (result == os::SuspendResume::SR_RUNNING) {
3704 sr_semaphore.signal();
3705 break;
3706 }
3707 }
3708
3709 } else if (state == os::SuspendResume::SR_RUNNING) {
3710 // request was cancelled, continue
3711 } else {
3712 ShouldNotReachHere();
3713 }
3714
3715 resume_clear_context(osthread);
3716 } else if (current == os::SuspendResume::SR_RUNNING) {
3717 // request was cancelled, continue
3718 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
3719 // ignore
3720 } else {
3721 // ignore
3722 }
3723
3724 errno = old_errno;
3725 }
3726
3727 void os::print_statistics() {
3728 }
3729
3730 int os::message_box(const char* title, const char* message) {
3731 int i;
3732 fdStream err(defaultStream::error_fd());
3733 for (i = 0; i < 78; i++) err.print_raw("=");
3734 err.cr();
3735 err.print_raw_cr(title);
3736 for (i = 0; i < 78; i++) err.print_raw("-");
3737 err.cr();
3738 err.print_raw_cr(message);
3739 for (i = 0; i < 78; i++) err.print_raw("=");
3740 err.cr();
3741
3742 char buf[16];
3743 // Prevent process from exiting upon "read error" without consuming all CPU
3744 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3745
3746 return buf[0] == 'y' || buf[0] == 'Y';
3747 }
3748
3749 static int sr_notify(OSThread* osthread) {
3750 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync());
3751 assert_status(status == 0, status, "thr_kill");
3752 return status;
3753 }
3754
3755 // "Randomly" selected value for how long we want to spin
3756 // before bailing out on suspending a thread, also how often
3757 // we send a signal to a thread we want to resume
3758 static const int RANDOMLY_LARGE_INTEGER = 1000000;
3759 static const int RANDOMLY_LARGE_INTEGER2 = 100;
3760
3761 static bool do_suspend(OSThread* osthread) {
3762 assert(osthread->sr.is_running(), "thread should be running");
3763 assert(!sr_semaphore.trywait(), "semaphore has invalid state");
3764
3765 // mark as suspended and send signal
3766 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
3767 // failed to switch, state wasn't running?
3768 ShouldNotReachHere();
3769 return false;
3770 }
3771
3772 if (sr_notify(osthread) != 0) {
3773 ShouldNotReachHere();
3774 }
3775
3776 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
3777 while (true) {
3778 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) {
3779 break;
3780 } else {
3781 // timeout
3782 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
3783 if (cancelled == os::SuspendResume::SR_RUNNING) {
3784 return false;
3785 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
3786 // make sure that we consume the signal on the semaphore as well
3787 sr_semaphore.wait();
3788 break;
3789 } else {
3790 ShouldNotReachHere();
3791 return false;
3792 }
3793 }
3794 }
3795
3796 guarantee(osthread->sr.is_suspended(), "Must be suspended");
3797 return true;
3798 }
3799
3800 static void do_resume(OSThread* osthread) {
3801 assert(osthread->sr.is_suspended(), "thread should be suspended");
3802 assert(!sr_semaphore.trywait(), "invalid semaphore state");
3803
3804 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
3805 // failed to switch to WAKEUP_REQUEST
3806 ShouldNotReachHere();
3807 return;
3808 }
3809
3810 while (true) {
3811 if (sr_notify(osthread) == 0) {
3812 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) {
3813 if (osthread->sr.is_running()) {
3814 return;
3815 }
3816 }
3817 } else {
3818 ShouldNotReachHere();
3819 }
3820 }
3821
3822 guarantee(osthread->sr.is_running(), "Must be running!");
3823 }
3824
3825 void os::SuspendedThreadTask::internal_do_task() {
3826 if (do_suspend(_thread->osthread())) {
3827 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
3828 do_task(context);
3829 do_resume(_thread->osthread());
3830 }
3831 }
3832
3833 class PcFetcher : public os::SuspendedThreadTask {
3834 public:
3835 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {}
3836 ExtendedPC result();
3837 protected:
3838 void do_task(const os::SuspendedThreadTaskContext& context);
3839 private:
3840 ExtendedPC _epc;
3841 };
3842
3843 ExtendedPC PcFetcher::result() {
3844 guarantee(is_done(), "task is not done yet.");
3845 return _epc;
3846 }
3847
3848 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) {
3849 Thread* thread = context.thread();
3850 OSThread* osthread = thread->osthread();
3851 if (osthread->ucontext() != NULL) {
3852 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext());
3853 } else {
3854 // NULL context is unexpected, double-check this is the VMThread
3855 guarantee(thread->is_VM_thread(), "can only be called for VMThread");
3856 }
3857 }
3858
3859 // A lightweight implementation that does not suspend the target thread and
3860 // thus returns only a hint. Used for profiling only!
3861 ExtendedPC os::get_thread_pc(Thread* thread) {
3862 // Make sure that it is called by the watcher and the Threads lock is owned.
3863 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
3864 // For now, is only used to profile the VM Thread
3865 assert(thread->is_VM_thread(), "Can only be called for VMThread");
3866 PcFetcher fetcher(thread);
3867 fetcher.run();
3868 return fetcher.result();
3869 }
3870
3871
3872 // This does not do anything on Solaris. This is basically a hook for being
3873 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
3874 void os::os_exception_wrapper(java_call_t f, JavaValue* value,
3875 methodHandle* method, JavaCallArguments* args,
3876 Thread* thread) {
3877 f(value, method, args, thread);
3878 }
3879
3880 // This routine may be used by user applications as a "hook" to catch signals.
3881 // The user-defined signal handler must pass unrecognized signals to this
3882 // routine, and if it returns true (non-zero), then the signal handler must
3883 // return immediately. If the flag "abort_if_unrecognized" is true, then this
3884 // routine will never retun false (zero), but instead will execute a VM panic
3885 // routine kill the process.
3886 //
3887 // If this routine returns false, it is OK to call it again. This allows
3888 // the user-defined signal handler to perform checks either before or after
3889 // the VM performs its own checks. Naturally, the user code would be making
3890 // a serious error if it tried to handle an exception (such as a null check
3891 // or breakpoint) that the VM was generating for its own correct operation.
3892 //
3893 // This routine may recognize any of the following kinds of signals:
3894 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
3895 // os::Solaris::SIGasync
3896 // It should be consulted by handlers for any of those signals.
3897 // It explicitly does not recognize os::Solaris::SIGinterrupt
3898 //
3899 // The caller of this routine must pass in the three arguments supplied
3900 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
3901 // field of the structure passed to sigaction(). This routine assumes that
3902 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
3903 //
3904 // Note that the VM will print warnings if it detects conflicting signal
3905 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
3906 //
3907 extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo,
3908 siginfo_t* siginfo,
3909 void* ucontext,
3910 int abort_if_unrecognized);
3911
3912
3913 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
3914 int orig_errno = errno; // Preserve errno value over signal handler.
3915 JVM_handle_solaris_signal(sig, info, ucVoid, true);
3916 errno = orig_errno;
3917 }
3918
3919 // Do not delete - if guarantee is ever removed, a signal handler (even empty)
3920 // is needed to provoke threads blocked on IO to return an EINTR
3921 // Note: this explicitly does NOT call JVM_handle_solaris_signal and
3922 // does NOT participate in signal chaining due to requirement for
3923 // NOT setting SA_RESTART to make EINTR work.
3924 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
3925 if (UseSignalChaining) {
3926 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
3927 if (actp && actp->sa_handler) {
3928 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
3929 }
3930 }
3931 }
3932
3933 // This boolean allows users to forward their own non-matching signals
3934 // to JVM_handle_solaris_signal, harmlessly.
3935 bool os::Solaris::signal_handlers_are_installed = false;
3936
3937 // For signal-chaining
3938 bool os::Solaris::libjsig_is_loaded = false;
3939 typedef struct sigaction *(*get_signal_t)(int);
3940 get_signal_t os::Solaris::get_signal_action = NULL;
3941
3942 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
3943 struct sigaction *actp = NULL;
3944
3945 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
3946 // Retrieve the old signal handler from libjsig
3947 actp = (*get_signal_action)(sig);
3948 }
3949 if (actp == NULL) {
3950 // Retrieve the preinstalled signal handler from jvm
3951 actp = get_preinstalled_handler(sig);
3952 }
3953
3954 return actp;
3955 }
3956
3957 static bool call_chained_handler(struct sigaction *actp, int sig,
3958 siginfo_t *siginfo, void *context) {
3959 // Call the old signal handler
3960 if (actp->sa_handler == SIG_DFL) {
3961 // It's more reasonable to let jvm treat it as an unexpected exception
3962 // instead of taking the default action.
3963 return false;
3964 } else if (actp->sa_handler != SIG_IGN) {
3965 if ((actp->sa_flags & SA_NODEFER) == 0) {
3966 // automaticlly block the signal
3967 sigaddset(&(actp->sa_mask), sig);
3968 }
3969
3970 sa_handler_t hand;
3971 sa_sigaction_t sa;
3972 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
3973 // retrieve the chained handler
3974 if (siginfo_flag_set) {
3975 sa = actp->sa_sigaction;
3976 } else {
3977 hand = actp->sa_handler;
3978 }
3979
3980 if ((actp->sa_flags & SA_RESETHAND) != 0) {
3981 actp->sa_handler = SIG_DFL;
3982 }
3983
3984 // try to honor the signal mask
3985 sigset_t oset;
3986 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
3987
3988 // call into the chained handler
3989 if (siginfo_flag_set) {
3990 (*sa)(sig, siginfo, context);
3991 } else {
3992 (*hand)(sig);
3993 }
3994
3995 // restore the signal mask
3996 thr_sigsetmask(SIG_SETMASK, &oset, 0);
3997 }
3998 // Tell jvm's signal handler the signal is taken care of.
3999 return true;
4000 }
4001
4002 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4003 bool chained = false;
4004 // signal-chaining
4005 if (UseSignalChaining) {
4006 struct sigaction *actp = get_chained_signal_action(sig);
4007 if (actp != NULL) {
4008 chained = call_chained_handler(actp, sig, siginfo, context);
4009 }
4010 }
4011 return chained;
4012 }
4013
4014 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4015 assert((chainedsigactions != (struct sigaction *)NULL) &&
4016 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4017 if (preinstalled_sigs[sig] != 0) {
4018 return &chainedsigactions[sig];
4019 }
4020 return NULL;
4021 }
4022
4023 void os::Solaris::save_preinstalled_handler(int sig,
4024 struct sigaction& oldAct) {
4025 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4026 assert((chainedsigactions != (struct sigaction *)NULL) &&
4027 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4028 chainedsigactions[sig] = oldAct;
4029 preinstalled_sigs[sig] = 1;
4030 }
4031
4032 void os::Solaris::set_signal_handler(int sig, bool set_installed,
4033 bool oktochain) {
4034 // Check for overwrite.
4035 struct sigaction oldAct;
4036 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4037 void* oldhand =
4038 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4039 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4040 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4041 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4042 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4043 if (AllowUserSignalHandlers || !set_installed) {
4044 // Do not overwrite; user takes responsibility to forward to us.
4045 return;
4046 } else if (UseSignalChaining) {
4047 if (oktochain) {
4048 // save the old handler in jvm
4049 save_preinstalled_handler(sig, oldAct);
4050 } else {
4051 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4052 }
4053 // libjsig also interposes the sigaction() call below and saves the
4054 // old sigaction on it own.
4055 } else {
4056 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4057 "%#lx for signal %d.", (long)oldhand, sig));
4058 }
4059 }
4060
4061 struct sigaction sigAct;
4062 sigfillset(&(sigAct.sa_mask));
4063 sigAct.sa_handler = SIG_DFL;
4064
4065 sigAct.sa_sigaction = signalHandler;
4066 // Handle SIGSEGV on alternate signal stack if
4067 // not using stack banging
4068 if (!UseStackBanging && sig == SIGSEGV) {
4069 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4070 } else if (sig == os::Solaris::SIGinterrupt()) {
4071 // Interruptible i/o requires SA_RESTART cleared so EINTR
4072 // is returned instead of restarting system calls
4073 sigemptyset(&sigAct.sa_mask);
4074 sigAct.sa_handler = NULL;
4075 sigAct.sa_flags = SA_SIGINFO;
4076 sigAct.sa_sigaction = sigINTRHandler;
4077 } else {
4078 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4079 }
4080 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4081
4082 sigaction(sig, &sigAct, &oldAct);
4083
4084 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4085 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4086 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4087 }
4088
4089
4090 #define DO_SIGNAL_CHECK(sig) \
4091 do { \
4092 if (!sigismember(&check_signal_done, sig)) { \
4093 os::Solaris::check_signal_handler(sig); \
4094 } \
4095 } while (0)
4096
4097 // This method is a periodic task to check for misbehaving JNI applications
4098 // under CheckJNI, we can add any periodic checks here
4099
4100 void os::run_periodic_checks() {
4101 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4102 // thereby preventing a NULL checks.
4103 if (!check_addr0_done) check_addr0_done = check_addr0(tty);
4104
4105 if (check_signals == false) return;
4106
4107 // SEGV and BUS if overridden could potentially prevent
4108 // generation of hs*.log in the event of a crash, debugging
4109 // such a case can be very challenging, so we absolutely
4110 // check for the following for a good measure:
4111 DO_SIGNAL_CHECK(SIGSEGV);
4112 DO_SIGNAL_CHECK(SIGILL);
4113 DO_SIGNAL_CHECK(SIGFPE);
4114 DO_SIGNAL_CHECK(SIGBUS);
4115 DO_SIGNAL_CHECK(SIGPIPE);
4116 DO_SIGNAL_CHECK(SIGXFSZ);
4117
4118 // ReduceSignalUsage allows the user to override these handlers
4119 // see comments at the very top and jvm_solaris.h
4120 if (!ReduceSignalUsage) {
4121 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4122 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4123 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4124 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4125 }
4126
4127 // See comments above for using JVM1/JVM2 and UseAltSigs
4128 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4129 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4130
4131 }
4132
4133 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4134
4135 static os_sigaction_t os_sigaction = NULL;
4136
4137 void os::Solaris::check_signal_handler(int sig) {
4138 char buf[O_BUFLEN];
4139 address jvmHandler = NULL;
4140
4141 struct sigaction act;
4142 if (os_sigaction == NULL) {
4143 // only trust the default sigaction, in case it has been interposed
4144 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4145 if (os_sigaction == NULL) return;
4146 }
4147
4148 os_sigaction(sig, (struct sigaction*)NULL, &act);
4149
4150 address thisHandler = (act.sa_flags & SA_SIGINFO)
4151 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4152 : CAST_FROM_FN_PTR(address, act.sa_handler);
4153
4154
4155 switch (sig) {
4156 case SIGSEGV:
4157 case SIGBUS:
4158 case SIGFPE:
4159 case SIGPIPE:
4160 case SIGXFSZ:
4161 case SIGILL:
4162 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4163 break;
4164
4165 case SHUTDOWN1_SIGNAL:
4166 case SHUTDOWN2_SIGNAL:
4167 case SHUTDOWN3_SIGNAL:
4168 case BREAK_SIGNAL:
4169 jvmHandler = (address)user_handler();
4170 break;
4171
4172 default:
4173 int intrsig = os::Solaris::SIGinterrupt();
4174 int asynsig = os::Solaris::SIGasync();
4175
4176 if (sig == intrsig) {
4177 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4178 } else if (sig == asynsig) {
4179 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4180 } else {
4181 return;
4182 }
4183 break;
4184 }
4185
4186
4187 if (thisHandler != jvmHandler) {
4188 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4189 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4190 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4191 // No need to check this sig any longer
4192 sigaddset(&check_signal_done, sig);
4193 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN
4194 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) {
4195 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell",
4196 exception_name(sig, buf, O_BUFLEN));
4197 }
4198 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4199 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4200 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4201 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4202 // No need to check this sig any longer
4203 sigaddset(&check_signal_done, sig);
4204 }
4205
4206 // Print all the signal handler state
4207 if (sigismember(&check_signal_done, sig)) {
4208 print_signal_handlers(tty, buf, O_BUFLEN);
4209 }
4210
4211 }
4212
4213 void os::Solaris::install_signal_handlers() {
4214 bool libjsigdone = false;
4215 signal_handlers_are_installed = true;
4216
4217 // signal-chaining
4218 typedef void (*signal_setting_t)();
4219 signal_setting_t begin_signal_setting = NULL;
4220 signal_setting_t end_signal_setting = NULL;
4221 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4222 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4223 if (begin_signal_setting != NULL) {
4224 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4225 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4226 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4227 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4228 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4229 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4230 libjsig_is_loaded = true;
4231 if (os::Solaris::get_libjsig_version != NULL) {
4232 libjsigversion = (*os::Solaris::get_libjsig_version)();
4233 }
4234 assert(UseSignalChaining, "should enable signal-chaining");
4235 }
4236 if (libjsig_is_loaded) {
4237 // Tell libjsig jvm is setting signal handlers
4238 (*begin_signal_setting)();
4239 }
4240
4241 set_signal_handler(SIGSEGV, true, true);
4242 set_signal_handler(SIGPIPE, true, true);
4243 set_signal_handler(SIGXFSZ, true, true);
4244 set_signal_handler(SIGBUS, true, true);
4245 set_signal_handler(SIGILL, true, true);
4246 set_signal_handler(SIGFPE, true, true);
4247
4248
4249 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4250
4251 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4252 // can not register overridable signals which might be > 32
4253 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4254 // Tell libjsig jvm has finished setting signal handlers
4255 (*end_signal_setting)();
4256 libjsigdone = true;
4257 }
4258 }
4259
4260 // Never ok to chain our SIGinterrupt
4261 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4262 set_signal_handler(os::Solaris::SIGasync(), true, true);
4263
4264 if (libjsig_is_loaded && !libjsigdone) {
4265 // Tell libjsig jvm finishes setting signal handlers
4266 (*end_signal_setting)();
4267 }
4268
4269 // We don't activate signal checker if libjsig is in place, we trust ourselves
4270 // and if UserSignalHandler is installed all bets are off.
4271 // Log that signal checking is off only if -verbose:jni is specified.
4272 if (CheckJNICalls) {
4273 if (libjsig_is_loaded) {
4274 if (PrintJNIResolving) {
4275 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4276 }
4277 check_signals = false;
4278 }
4279 if (AllowUserSignalHandlers) {
4280 if (PrintJNIResolving) {
4281 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4282 }
4283 check_signals = false;
4284 }
4285 }
4286 }
4287
4288
4289 void report_error(const char* file_name, int line_no, const char* title,
4290 const char* format, ...);
4291
4292 const char * signames[] = {
4293 "SIG0",
4294 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4295 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4296 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4297 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4298 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4299 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4300 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4301 "SIGCANCEL", "SIGLOST"
4302 };
4303
4304 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4305 if (0 < exception_code && exception_code <= SIGRTMAX) {
4306 // signal
4307 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4308 jio_snprintf(buf, size, "%s", signames[exception_code]);
4309 } else {
4310 jio_snprintf(buf, size, "SIG%d", exception_code);
4311 }
4312 return buf;
4313 } else {
4314 return NULL;
4315 }
4316 }
4317
4318 // (Static) wrapper for getisax(2) call.
4319 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4320
4321 // (Static) wrappers for the liblgrp API
4322 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4323 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4324 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4325 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4326 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4327 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4328 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4329 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4330 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4331
4332 // (Static) wrapper for meminfo() call.
4333 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4334
4335 static address resolve_symbol_lazy(const char* name) {
4336 address addr = (address) dlsym(RTLD_DEFAULT, name);
4337 if (addr == NULL) {
4338 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4339 addr = (address) dlsym(RTLD_NEXT, name);
4340 }
4341 return addr;
4342 }
4343
4344 static address resolve_symbol(const char* name) {
4345 address addr = resolve_symbol_lazy(name);
4346 if (addr == NULL) {
4347 fatal(dlerror());
4348 }
4349 return addr;
4350 }
4351
4352 void os::Solaris::libthread_init() {
4353 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4354
4355 lwp_priocntl_init();
4356
4357 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4358 if (func == NULL) {
4359 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4360 // Guarantee that this VM is running on an new enough OS (5.6 or
4361 // later) that it will have a new enough libthread.so.
4362 guarantee(func != NULL, "libthread.so is too old.");
4363 }
4364
4365 int size;
4366 void (*handler_info_func)(address *, int *);
4367 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4368 handler_info_func(&handler_start, &size);
4369 handler_end = handler_start + size;
4370 }
4371
4372
4373 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4374 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4375 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4376 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4377 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4378 int os::Solaris::_mutex_scope = USYNC_THREAD;
4379
4380 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4381 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4382 int_fnP_cond_tP os::Solaris::_cond_signal;
4383 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4384 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4385 int_fnP_cond_tP os::Solaris::_cond_destroy;
4386 int os::Solaris::_cond_scope = USYNC_THREAD;
4387
4388 void os::Solaris::synchronization_init() {
4389 if (UseLWPSynchronization) {
4390 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4391 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4392 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4393 os::Solaris::set_mutex_init(lwp_mutex_init);
4394 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4395 os::Solaris::set_mutex_scope(USYNC_THREAD);
4396
4397 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4398 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4399 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4400 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4401 os::Solaris::set_cond_init(lwp_cond_init);
4402 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4403 os::Solaris::set_cond_scope(USYNC_THREAD);
4404 } else {
4405 os::Solaris::set_mutex_scope(USYNC_THREAD);
4406 os::Solaris::set_cond_scope(USYNC_THREAD);
4407
4408 if (UsePthreads) {
4409 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4410 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4411 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4412 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4413 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4414
4415 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4416 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4417 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4418 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4419 os::Solaris::set_cond_init(pthread_cond_default_init);
4420 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4421 } else {
4422 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4423 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4424 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4425 os::Solaris::set_mutex_init(::mutex_init);
4426 os::Solaris::set_mutex_destroy(::mutex_destroy);
4427
4428 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4429 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4430 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4431 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4432 os::Solaris::set_cond_init(::cond_init);
4433 os::Solaris::set_cond_destroy(::cond_destroy);
4434 }
4435 }
4436 }
4437
4438 bool os::Solaris::liblgrp_init() {
4439 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4440 if (handle != NULL) {
4441 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4442 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4443 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4444 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4445 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4446 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4447 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4448 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4449 dlsym(handle, "lgrp_cookie_stale")));
4450
4451 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4452 set_lgrp_cookie(c);
4453 return true;
4454 }
4455 return false;
4456 }
4457
4458 void os::Solaris::misc_sym_init() {
4459 address func;
4460
4461 // getisax
4462 func = resolve_symbol_lazy("getisax");
4463 if (func != NULL) {
4464 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4465 }
4466
4467 // meminfo
4468 func = resolve_symbol_lazy("meminfo");
4469 if (func != NULL) {
4470 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4471 }
4472 }
4473
4474 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4475 assert(_getisax != NULL, "_getisax not set");
4476 return _getisax(array, n);
4477 }
4478
4479 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4480 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4481 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4482
4483 void init_pset_getloadavg_ptr(void) {
4484 pset_getloadavg_ptr =
4485 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4486 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4487 warning("pset_getloadavg function not found");
4488 }
4489 }
4490
4491 int os::Solaris::_dev_zero_fd = -1;
4492
4493 // this is called _before_ the global arguments have been parsed
4494 void os::init(void) {
4495 _initial_pid = getpid();
4496
4497 max_hrtime = first_hrtime = gethrtime();
4498
4499 init_random(1234567);
4500
4501 page_size = sysconf(_SC_PAGESIZE);
4502 if (page_size == -1) {
4503 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4504 strerror(errno)));
4505 }
4506 init_page_sizes((size_t) page_size);
4507
4508 Solaris::initialize_system_info();
4509
4510 // Initialize misc. symbols as soon as possible, so we can use them
4511 // if we need them.
4512 Solaris::misc_sym_init();
4513
4514 int fd = ::open("/dev/zero", O_RDWR);
4515 if (fd < 0) {
4516 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
4517 } else {
4518 Solaris::set_dev_zero_fd(fd);
4519
4520 // Close on exec, child won't inherit.
4521 fcntl(fd, F_SETFD, FD_CLOEXEC);
4522 }
4523
4524 clock_tics_per_sec = CLK_TCK;
4525
4526 // check if dladdr1() exists; dladdr1 can provide more information than
4527 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4528 // and is available on linker patches for 5.7 and 5.8.
4529 // libdl.so must have been loaded, this call is just an entry lookup
4530 void * hdl = dlopen("libdl.so", RTLD_NOW);
4531 if (hdl) {
4532 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4533 }
4534
4535 // (Solaris only) this switches to calls that actually do locking.
4536 ThreadCritical::initialize();
4537
4538 main_thread = thr_self();
4539
4540 // Constant minimum stack size allowed. It must be at least
4541 // the minimum of what the OS supports (thr_min_stack()), and
4542 // enough to allow the thread to get to user bytecode execution.
4543 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4544 // If the pagesize of the VM is greater than 8K determine the appropriate
4545 // number of initial guard pages. The user can change this with the
4546 // command line arguments, if needed.
4547 if (vm_page_size() > 8*K) {
4548 StackYellowPages = 1;
4549 StackRedPages = 1;
4550 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4551 }
4552 }
4553
4554 // To install functions for atexit system call
4555 extern "C" {
4556 static void perfMemory_exit_helper() {
4557 perfMemory_exit();
4558 }
4559 }
4560
4561 // this is called _after_ the global arguments have been parsed
4562 jint os::init_2(void) {
4563 // try to enable extended file IO ASAP, see 6431278
4564 os::Solaris::try_enable_extended_io();
4565
4566 // Allocate a single page and mark it as readable for safepoint polling. Also
4567 // use this first mmap call to check support for MAP_ALIGN.
4568 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4569 page_size,
4570 MAP_PRIVATE | MAP_ALIGN,
4571 PROT_READ);
4572 if (polling_page == NULL) {
4573 has_map_align = false;
4574 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4575 PROT_READ);
4576 }
4577
4578 os::set_polling_page(polling_page);
4579
4580 #ifndef PRODUCT
4581 if (Verbose && PrintMiscellaneous) {
4582 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n",
4583 (intptr_t)polling_page);
4584 }
4585 #endif
4586
4587 if (!UseMembar) {
4588 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE);
4589 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page");
4590 os::set_memory_serialize_page(mem_serialize_page);
4591
4592 #ifndef PRODUCT
4593 if (Verbose && PrintMiscellaneous) {
4594 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n",
4595 (intptr_t)mem_serialize_page);
4596 }
4597 #endif
4598 }
4599
4600 // Check minimum allowable stack size for thread creation and to initialize
4601 // the java system classes, including StackOverflowError - depends on page
4602 // size. Add a page for compiler2 recursion in main thread.
4603 // Add in 2*BytesPerWord times page size to account for VM stack during
4604 // class initialization depending on 32 or 64 bit VM.
4605 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
4606 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
4607 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
4608
4609 size_t threadStackSizeInBytes = ThreadStackSize * K;
4610 if (threadStackSizeInBytes != 0 &&
4611 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
4612 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
4613 os::Solaris::min_stack_allowed/K);
4614 return JNI_ERR;
4615 }
4616
4617 // For 64kbps there will be a 64kb page size, which makes
4618 // the usable default stack size quite a bit less. Increase the
4619 // stack for 64kb (or any > than 8kb) pages, this increases
4620 // virtual memory fragmentation (since we're not creating the
4621 // stack on a power of 2 boundary. The real fix for this
4622 // should be to fix the guard page mechanism.
4623
4624 if (vm_page_size() > 8*K) {
4625 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
4626 ? threadStackSizeInBytes +
4627 ((StackYellowPages + StackRedPages) * vm_page_size())
4628 : 0;
4629 ThreadStackSize = threadStackSizeInBytes/K;
4630 }
4631
4632 // Make the stack size a multiple of the page size so that
4633 // the yellow/red zones can be guarded.
4634 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
4635 vm_page_size()));
4636
4637 Solaris::libthread_init();
4638
4639 if (UseNUMA) {
4640 if (!Solaris::liblgrp_init()) {
4641 UseNUMA = false;
4642 } else {
4643 size_t lgrp_limit = os::numa_get_groups_num();
4644 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
4645 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4646 FREE_C_HEAP_ARRAY(int, lgrp_ids);
4647 if (lgrp_num < 2) {
4648 // There's only one locality group, disable NUMA.
4649 UseNUMA = false;
4650 }
4651 }
4652 if (!UseNUMA && ForceNUMA) {
4653 UseNUMA = true;
4654 }
4655 }
4656
4657 Solaris::signal_sets_init();
4658 Solaris::init_signal_mem();
4659 Solaris::install_signal_handlers();
4660
4661 if (libjsigversion < JSIG_VERSION_1_4_1) {
4662 Maxlibjsigsigs = OLDMAXSIGNUM;
4663 }
4664
4665 // initialize synchronization primitives to use either thread or
4666 // lwp synchronization (controlled by UseLWPSynchronization)
4667 Solaris::synchronization_init();
4668
4669 if (MaxFDLimit) {
4670 // set the number of file descriptors to max. print out error
4671 // if getrlimit/setrlimit fails but continue regardless.
4672 struct rlimit nbr_files;
4673 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4674 if (status != 0) {
4675 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4676 perror("os::init_2 getrlimit failed");
4677 }
4678 } else {
4679 nbr_files.rlim_cur = nbr_files.rlim_max;
4680 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4681 if (status != 0) {
4682 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4683 perror("os::init_2 setrlimit failed");
4684 }
4685 }
4686 }
4687 }
4688
4689 // Calculate theoretical max. size of Threads to guard gainst
4690 // artifical out-of-memory situations, where all available address-
4691 // space has been reserved by thread stacks. Default stack size is 1Mb.
4692 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
4693 JavaThread::stack_size_at_create() : (1*K*K);
4694 assert(pre_thread_stack_size != 0, "Must have a stack");
4695 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
4696 // we should start doing Virtual Memory banging. Currently when the threads will
4697 // have used all but 200Mb of space.
4698 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
4699 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
4700
4701 // at-exit methods are called in the reverse order of their registration.
4702 // In Solaris 7 and earlier, atexit functions are called on return from
4703 // main or as a result of a call to exit(3C). There can be only 32 of
4704 // these functions registered and atexit() does not set errno. In Solaris
4705 // 8 and later, there is no limit to the number of functions registered
4706 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
4707 // functions are called upon dlclose(3DL) in addition to return from main
4708 // and exit(3C).
4709
4710 if (PerfAllowAtExitRegistration) {
4711 // only register atexit functions if PerfAllowAtExitRegistration is set.
4712 // atexit functions can be delayed until process exit time, which
4713 // can be problematic for embedded VM situations. Embedded VMs should
4714 // call DestroyJavaVM() to assure that VM resources are released.
4715
4716 // note: perfMemory_exit_helper atexit function may be removed in
4717 // the future if the appropriate cleanup code can be added to the
4718 // VM_Exit VMOperation's doit method.
4719 if (atexit(perfMemory_exit_helper) != 0) {
4720 warning("os::init2 atexit(perfMemory_exit_helper) failed");
4721 }
4722 }
4723
4724 // Init pset_loadavg function pointer
4725 init_pset_getloadavg_ptr();
4726
4727 return JNI_OK;
4728 }
4729
4730 // Mark the polling page as unreadable
4731 void os::make_polling_page_unreadable(void) {
4732 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) {
4733 fatal("Could not disable polling page");
4734 }
4735 }
4736
4737 // Mark the polling page as readable
4738 void os::make_polling_page_readable(void) {
4739 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) {
4740 fatal("Could not enable polling page");
4741 }
4742 }
4743
4744 // OS interface.
4745
4746 bool os::check_heap(bool force) { return true; }
4747
4748 // Is a (classpath) directory empty?
4749 bool os::dir_is_empty(const char* path) {
4750 DIR *dir = NULL;
4751 struct dirent *ptr;
4752
4753 dir = opendir(path);
4754 if (dir == NULL) return true;
4755
4756 // Scan the directory
4757 bool result = true;
4758 char buf[sizeof(struct dirent) + MAX_PATH];
4759 struct dirent *dbuf = (struct dirent *) buf;
4760 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
4761 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
4762 result = false;
4763 }
4764 }
4765 closedir(dir);
4766 return result;
4767 }
4768
4769 // This code originates from JDK's sysOpen and open64_w
4770 // from src/solaris/hpi/src/system_md.c
4771
4772 int os::open(const char *path, int oflag, int mode) {
4773 if (strlen(path) > MAX_PATH - 1) {
4774 errno = ENAMETOOLONG;
4775 return -1;
4776 }
4777 int fd;
4778
4779 fd = ::open64(path, oflag, mode);
4780 if (fd == -1) return -1;
4781
4782 // If the open succeeded, the file might still be a directory
4783 {
4784 struct stat64 buf64;
4785 int ret = ::fstat64(fd, &buf64);
4786 int st_mode = buf64.st_mode;
4787
4788 if (ret != -1) {
4789 if ((st_mode & S_IFMT) == S_IFDIR) {
4790 errno = EISDIR;
4791 ::close(fd);
4792 return -1;
4793 }
4794 } else {
4795 ::close(fd);
4796 return -1;
4797 }
4798 }
4799
4800 // 32-bit Solaris systems suffer from:
4801 //
4802 // - an historical default soft limit of 256 per-process file
4803 // descriptors that is too low for many Java programs.
4804 //
4805 // - a design flaw where file descriptors created using stdio
4806 // fopen must be less than 256, _even_ when the first limit above
4807 // has been raised. This can cause calls to fopen (but not calls to
4808 // open, for example) to fail mysteriously, perhaps in 3rd party
4809 // native code (although the JDK itself uses fopen). One can hardly
4810 // criticize them for using this most standard of all functions.
4811 //
4812 // We attempt to make everything work anyways by:
4813 //
4814 // - raising the soft limit on per-process file descriptors beyond
4815 // 256
4816 //
4817 // - As of Solaris 10u4, we can request that Solaris raise the 256
4818 // stdio fopen limit by calling function enable_extended_FILE_stdio.
4819 // This is done in init_2 and recorded in enabled_extended_FILE_stdio
4820 //
4821 // - If we are stuck on an old (pre 10u4) Solaris system, we can
4822 // workaround the bug by remapping non-stdio file descriptors below
4823 // 256 to ones beyond 256, which is done below.
4824 //
4825 // See:
4826 // 1085341: 32-bit stdio routines should support file descriptors >255
4827 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files
4828 // 6431278: Netbeans crash on 32 bit Solaris: need to call
4829 // enable_extended_FILE_stdio() in VM initialisation
4830 // Giri Mandalika's blog
4831 // http://technopark02.blogspot.com/2005_05_01_archive.html
4832 //
4833 #ifndef _LP64
4834 if ((!enabled_extended_FILE_stdio) && fd < 256) {
4835 int newfd = ::fcntl(fd, F_DUPFD, 256);
4836 if (newfd != -1) {
4837 ::close(fd);
4838 fd = newfd;
4839 }
4840 }
4841 #endif // 32-bit Solaris
4842
4843 // All file descriptors that are opened in the JVM and not
4844 // specifically destined for a subprocess should have the
4845 // close-on-exec flag set. If we don't set it, then careless 3rd
4846 // party native code might fork and exec without closing all
4847 // appropriate file descriptors (e.g. as we do in closeDescriptors in
4848 // UNIXProcess.c), and this in turn might:
4849 //
4850 // - cause end-of-file to fail to be detected on some file
4851 // descriptors, resulting in mysterious hangs, or
4852 //
4853 // - might cause an fopen in the subprocess to fail on a system
4854 // suffering from bug 1085341.
4855 //
4856 // (Yes, the default setting of the close-on-exec flag is a Unix
4857 // design flaw)
4858 //
4859 // See:
4860 // 1085341: 32-bit stdio routines should support file descriptors >255
4861 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed
4862 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
4863 //
4864 #ifdef FD_CLOEXEC
4865 {
4866 int flags = ::fcntl(fd, F_GETFD);
4867 if (flags != -1) {
4868 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
4869 }
4870 }
4871 #endif
4872
4873 return fd;
4874 }
4875
4876 // create binary file, rewriting existing file if required
4877 int os::create_binary_file(const char* path, bool rewrite_existing) {
4878 int oflags = O_WRONLY | O_CREAT;
4879 if (!rewrite_existing) {
4880 oflags |= O_EXCL;
4881 }
4882 return ::open64(path, oflags, S_IREAD | S_IWRITE);
4883 }
4884
4885 // return current position of file pointer
4886 jlong os::current_file_offset(int fd) {
4887 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
4888 }
4889
4890 // move file pointer to the specified offset
4891 jlong os::seek_to_file_offset(int fd, jlong offset) {
4892 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
4893 }
4894
4895 jlong os::lseek(int fd, jlong offset, int whence) {
4896 return (jlong) ::lseek64(fd, offset, whence);
4897 }
4898
4899 char * os::native_path(char *path) {
4900 return path;
4901 }
4902
4903 int os::ftruncate(int fd, jlong length) {
4904 return ::ftruncate64(fd, length);
4905 }
4906
4907 int os::fsync(int fd) {
4908 RESTARTABLE_RETURN_INT(::fsync(fd));
4909 }
4910
4911 int os::available(int fd, jlong *bytes) {
4912 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
4913 "Assumed _thread_in_native");
4914 jlong cur, end;
4915 int mode;
4916 struct stat64 buf64;
4917
4918 if (::fstat64(fd, &buf64) >= 0) {
4919 mode = buf64.st_mode;
4920 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
4921 int n,ioctl_return;
4922
4923 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return);
4924 if (ioctl_return>= 0) {
4925 *bytes = n;
4926 return 1;
4927 }
4928 }
4929 }
4930 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
4931 return 0;
4932 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
4933 return 0;
4934 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
4935 return 0;
4936 }
4937 *bytes = end - cur;
4938 return 1;
4939 }
4940
4941 // Map a block of memory.
4942 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
4943 char *addr, size_t bytes, bool read_only,
4944 bool allow_exec) {
4945 int prot;
4946 int flags;
4947
4948 if (read_only) {
4949 prot = PROT_READ;
4950 flags = MAP_SHARED;
4951 } else {
4952 prot = PROT_READ | PROT_WRITE;
4953 flags = MAP_PRIVATE;
4954 }
4955
4956 if (allow_exec) {
4957 prot |= PROT_EXEC;
4958 }
4959
4960 if (addr != NULL) {
4961 flags |= MAP_FIXED;
4962 }
4963
4964 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
4965 fd, file_offset);
4966 if (mapped_address == MAP_FAILED) {
4967 return NULL;
4968 }
4969 return mapped_address;
4970 }
4971
4972
4973 // Remap a block of memory.
4974 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
4975 char *addr, size_t bytes, bool read_only,
4976 bool allow_exec) {
4977 // same as map_memory() on this OS
4978 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
4979 allow_exec);
4980 }
4981
4982
4983 // Unmap a block of memory.
4984 bool os::pd_unmap_memory(char* addr, size_t bytes) {
4985 return munmap(addr, bytes) == 0;
4986 }
4987
4988 void os::pause() {
4989 char filename[MAX_PATH];
4990 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
4991 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
4992 } else {
4993 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
4994 }
4995
4996 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
4997 if (fd != -1) {
4998 struct stat buf;
4999 ::close(fd);
5000 while (::stat(filename, &buf) == 0) {
5001 (void)::poll(NULL, 0, 100);
5002 }
5003 } else {
5004 jio_fprintf(stderr,
5005 "Could not open pause file '%s', continuing immediately.\n", filename);
5006 }
5007 }
5008
5009 #ifndef PRODUCT
5010 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5011 // Turn this on if you need to trace synch operations.
5012 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5013 // and call record_synch_enable and record_synch_disable
5014 // around the computation of interest.
5015
5016 void record_synch(char* name, bool returning); // defined below
5017
5018 class RecordSynch {
5019 char* _name;
5020 public:
5021 RecordSynch(char* name) :_name(name) { record_synch(_name, false); }
5022 ~RecordSynch() { record_synch(_name, true); }
5023 };
5024
5025 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5026 extern "C" ret name params { \
5027 typedef ret name##_t params; \
5028 static name##_t* implem = NULL; \
5029 static int callcount = 0; \
5030 if (implem == NULL) { \
5031 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5032 if (implem == NULL) fatal(dlerror()); \
5033 } \
5034 ++callcount; \
5035 RecordSynch _rs(#name); \
5036 inner; \
5037 return implem args; \
5038 }
5039 // in dbx, examine callcounts this way:
5040 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5041
5042 #define CHECK_POINTER_OK(p) \
5043 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5044 #define CHECK_MU \
5045 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5046 #define CHECK_CV \
5047 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5048 #define CHECK_P(p) \
5049 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5050
5051 #define CHECK_MUTEX(mutex_op) \
5052 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5053
5054 CHECK_MUTEX( mutex_lock)
5055 CHECK_MUTEX( _mutex_lock)
5056 CHECK_MUTEX( mutex_unlock)
5057 CHECK_MUTEX(_mutex_unlock)
5058 CHECK_MUTEX( mutex_trylock)
5059 CHECK_MUTEX(_mutex_trylock)
5060
5061 #define CHECK_COND(cond_op) \
5062 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV);
5063
5064 CHECK_COND( cond_wait);
5065 CHECK_COND(_cond_wait);
5066 CHECK_COND(_cond_wait_cancel);
5067
5068 #define CHECK_COND2(cond_op) \
5069 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV);
5070
5071 CHECK_COND2( cond_timedwait);
5072 CHECK_COND2(_cond_timedwait);
5073 CHECK_COND2(_cond_timedwait_cancel);
5074
5075 // do the _lwp_* versions too
5076 #define mutex_t lwp_mutex_t
5077 #define cond_t lwp_cond_t
5078 CHECK_MUTEX( _lwp_mutex_lock)
5079 CHECK_MUTEX( _lwp_mutex_unlock)
5080 CHECK_MUTEX( _lwp_mutex_trylock)
5081 CHECK_MUTEX( __lwp_mutex_lock)
5082 CHECK_MUTEX( __lwp_mutex_unlock)
5083 CHECK_MUTEX( __lwp_mutex_trylock)
5084 CHECK_MUTEX(___lwp_mutex_lock)
5085 CHECK_MUTEX(___lwp_mutex_unlock)
5086
5087 CHECK_COND( _lwp_cond_wait);
5088 CHECK_COND( __lwp_cond_wait);
5089 CHECK_COND(___lwp_cond_wait);
5090
5091 CHECK_COND2( _lwp_cond_timedwait);
5092 CHECK_COND2( __lwp_cond_timedwait);
5093 #undef mutex_t
5094 #undef cond_t
5095
5096 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5097 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5098 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5099 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5100 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5101 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5102 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5103 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5104
5105
5106 // recording machinery:
5107
5108 enum { RECORD_SYNCH_LIMIT = 200 };
5109 char* record_synch_name[RECORD_SYNCH_LIMIT];
5110 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5111 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5112 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5113 int record_synch_count = 0;
5114 bool record_synch_enabled = false;
5115
5116 // in dbx, examine recorded data this way:
5117 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5118
5119 void record_synch(char* name, bool returning) {
5120 if (record_synch_enabled) {
5121 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5122 record_synch_name[record_synch_count] = name;
5123 record_synch_returning[record_synch_count] = returning;
5124 record_synch_thread[record_synch_count] = thr_self();
5125 record_synch_arg0ptr[record_synch_count] = &name;
5126 record_synch_count++;
5127 }
5128 // put more checking code here:
5129 // ...
5130 }
5131 }
5132
5133 void record_synch_enable() {
5134 // start collecting trace data, if not already doing so
5135 if (!record_synch_enabled) record_synch_count = 0;
5136 record_synch_enabled = true;
5137 }
5138
5139 void record_synch_disable() {
5140 // stop collecting trace data
5141 record_synch_enabled = false;
5142 }
5143
5144 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5145 #endif // PRODUCT
5146
5147 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5148 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5149 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5150
5151
5152 // JVMTI & JVM monitoring and management support
5153 // The thread_cpu_time() and current_thread_cpu_time() are only
5154 // supported if is_thread_cpu_time_supported() returns true.
5155 // They are not supported on Solaris T1.
5156
5157 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5158 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5159 // of a thread.
5160 //
5161 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5162 // returns the fast estimate available on the platform.
5163
5164 // hrtime_t gethrvtime() return value includes
5165 // user time but does not include system time
5166 jlong os::current_thread_cpu_time() {
5167 return (jlong) gethrvtime();
5168 }
5169
5170 jlong os::thread_cpu_time(Thread *thread) {
5171 // return user level CPU time only to be consistent with
5172 // what current_thread_cpu_time returns.
5173 // thread_cpu_time_info() must be changed if this changes
5174 return os::thread_cpu_time(thread, false /* user time only */);
5175 }
5176
5177 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5178 if (user_sys_cpu_time) {
5179 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5180 } else {
5181 return os::current_thread_cpu_time();
5182 }
5183 }
5184
5185 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5186 char proc_name[64];
5187 int count;
5188 prusage_t prusage;
5189 jlong lwp_time;
5190 int fd;
5191
5192 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5193 getpid(),
5194 thread->osthread()->lwp_id());
5195 fd = ::open(proc_name, O_RDONLY);
5196 if (fd == -1) return -1;
5197
5198 do {
5199 count = ::pread(fd,
5200 (void *)&prusage.pr_utime,
5201 thr_time_size,
5202 thr_time_off);
5203 } while (count < 0 && errno == EINTR);
5204 ::close(fd);
5205 if (count < 0) return -1;
5206
5207 if (user_sys_cpu_time) {
5208 // user + system CPU time
5209 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5210 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5211 (jlong)prusage.pr_stime.tv_nsec +
5212 (jlong)prusage.pr_utime.tv_nsec;
5213 } else {
5214 // user level CPU time only
5215 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5216 (jlong)prusage.pr_utime.tv_nsec;
5217 }
5218
5219 return (lwp_time);
5220 }
5221
5222 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5223 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5224 info_ptr->may_skip_backward = false; // elapsed time not wall time
5225 info_ptr->may_skip_forward = false; // elapsed time not wall time
5226 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5227 }
5228
5229 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5230 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5231 info_ptr->may_skip_backward = false; // elapsed time not wall time
5232 info_ptr->may_skip_forward = false; // elapsed time not wall time
5233 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5234 }
5235
5236 bool os::is_thread_cpu_time_supported() {
5237 return true;
5238 }
5239
5240 // System loadavg support. Returns -1 if load average cannot be obtained.
5241 // Return the load average for our processor set if the primitive exists
5242 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5243 int os::loadavg(double loadavg[], int nelem) {
5244 if (pset_getloadavg_ptr != NULL) {
5245 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5246 } else {
5247 return ::getloadavg(loadavg, nelem);
5248 }
5249 }
5250
5251 //---------------------------------------------------------------------------------
5252
5253 bool os::find(address addr, outputStream* st) {
5254 Dl_info dlinfo;
5255 memset(&dlinfo, 0, sizeof(dlinfo));
5256 if (dladdr(addr, &dlinfo) != 0) {
5257 st->print(PTR_FORMAT ": ", addr);
5258 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
5259 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5260 } else if (dlinfo.dli_fbase != NULL) {
5261 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5262 } else {
5263 st->print("<absolute address>");
5264 }
5265 if (dlinfo.dli_fname != NULL) {
5266 st->print(" in %s", dlinfo.dli_fname);
5267 }
5268 if (dlinfo.dli_fbase != NULL) {
5269 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
5270 }
5271 st->cr();
5272
5273 if (Verbose) {
5274 // decode some bytes around the PC
5275 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size());
5276 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size());
5277 address lowest = (address) dlinfo.dli_sname;
5278 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5279 if (begin < lowest) begin = lowest;
5280 Dl_info dlinfo2;
5281 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
5282 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) {
5283 end = (address) dlinfo2.dli_saddr;
5284 }
5285 Disassembler::decode(begin, end, st);
5286 }
5287 return true;
5288 }
5289 return false;
5290 }
5291
5292 // Following function has been added to support HotSparc's libjvm.so running
5293 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5294 // src/solaris/hpi/native_threads in the EVM codebase.
5295 //
5296 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5297 // libraries and should thus be removed. We will leave it behind for a while
5298 // until we no longer want to able to run on top of 1.3.0 Solaris production
5299 // JDK. See 4341971.
5300
5301 #define STACK_SLACK 0x800
5302
5303 extern "C" {
5304 intptr_t sysThreadAvailableStackWithSlack() {
5305 stack_t st;
5306 intptr_t retval, stack_top;
5307 retval = thr_stksegment(&st);
5308 assert(retval == 0, "incorrect return value from thr_stksegment");
5309 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5310 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5311 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5312 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5313 }
5314 }
5315
5316 // ObjectMonitor park-unpark infrastructure ...
5317 //
5318 // We implement Solaris and Linux PlatformEvents with the
5319 // obvious condvar-mutex-flag triple.
5320 // Another alternative that works quite well is pipes:
5321 // Each PlatformEvent consists of a pipe-pair.
5322 // The thread associated with the PlatformEvent
5323 // calls park(), which reads from the input end of the pipe.
5324 // Unpark() writes into the other end of the pipe.
5325 // The write-side of the pipe must be set NDELAY.
5326 // Unfortunately pipes consume a large # of handles.
5327 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5328 // Using pipes for the 1st few threads might be workable, however.
5329 //
5330 // park() is permitted to return spuriously.
5331 // Callers of park() should wrap the call to park() in
5332 // an appropriate loop. A litmus test for the correct
5333 // usage of park is the following: if park() were modified
5334 // to immediately return 0 your code should still work,
5335 // albeit degenerating to a spin loop.
5336 //
5337 // In a sense, park()-unpark() just provides more polite spinning
5338 // and polling with the key difference over naive spinning being
5339 // that a parked thread needs to be explicitly unparked() in order
5340 // to wake up and to poll the underlying condition.
5341 //
5342 // Assumption:
5343 // Only one parker can exist on an event, which is why we allocate
5344 // them per-thread. Multiple unparkers can coexist.
5345 //
5346 // _Event transitions in park()
5347 // -1 => -1 : illegal
5348 // 1 => 0 : pass - return immediately
5349 // 0 => -1 : block; then set _Event to 0 before returning
5350 //
5351 // _Event transitions in unpark()
5352 // 0 => 1 : just return
5353 // 1 => 1 : just return
5354 // -1 => either 0 or 1; must signal target thread
5355 // That is, we can safely transition _Event from -1 to either
5356 // 0 or 1.
5357 //
5358 // _Event serves as a restricted-range semaphore.
5359 // -1 : thread is blocked, i.e. there is a waiter
5360 // 0 : neutral: thread is running or ready,
5361 // could have been signaled after a wait started
5362 // 1 : signaled - thread is running or ready
5363 //
5364 // Another possible encoding of _Event would be with
5365 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5366 //
5367 // TODO-FIXME: add DTRACE probes for:
5368 // 1. Tx parks
5369 // 2. Ty unparks Tx
5370 // 3. Tx resumes from park
5371
5372
5373 // value determined through experimentation
5374 #define ROUNDINGFIX 11
5375
5376 // utility to compute the abstime argument to timedwait.
5377 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5378
5379 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5380 // millis is the relative timeout time
5381 // abstime will be the absolute timeout time
5382 if (millis < 0) millis = 0;
5383 struct timeval now;
5384 int status = gettimeofday(&now, NULL);
5385 assert(status == 0, "gettimeofday");
5386 jlong seconds = millis / 1000;
5387 jlong max_wait_period;
5388
5389 if (UseLWPSynchronization) {
5390 // forward port of fix for 4275818 (not sleeping long enough)
5391 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5392 // _lwp_cond_timedwait() used a round_down algorithm rather
5393 // than a round_up. For millis less than our roundfactor
5394 // it rounded down to 0 which doesn't meet the spec.
5395 // For millis > roundfactor we may return a bit sooner, but
5396 // since we can not accurately identify the patch level and
5397 // this has already been fixed in Solaris 9 and 8 we will
5398 // leave it alone rather than always rounding down.
5399
5400 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5401 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5402 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5403 max_wait_period = 21000000;
5404 } else {
5405 max_wait_period = 50000000;
5406 }
5407 millis %= 1000;
5408 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5409 seconds = max_wait_period;
5410 }
5411 abstime->tv_sec = now.tv_sec + seconds;
5412 long usec = now.tv_usec + millis * 1000;
5413 if (usec >= 1000000) {
5414 abstime->tv_sec += 1;
5415 usec -= 1000000;
5416 }
5417 abstime->tv_nsec = usec * 1000;
5418 return abstime;
5419 }
5420
5421 void os::PlatformEvent::park() { // AKA: down()
5422 // Transitions for _Event:
5423 // -1 => -1 : illegal
5424 // 1 => 0 : pass - return immediately
5425 // 0 => -1 : block; then set _Event to 0 before returning
5426
5427 // Invariant: Only the thread associated with the Event/PlatformEvent
5428 // may call park().
5429 assert(_nParked == 0, "invariant");
5430
5431 int v;
5432 for (;;) {
5433 v = _Event;
5434 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5435 }
5436 guarantee(v >= 0, "invariant");
5437 if (v == 0) {
5438 // Do this the hard way by blocking ...
5439 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5440 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5441 // Only for SPARC >= V8PlusA
5442 #if defined(__sparc) && defined(COMPILER2)
5443 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5444 #endif
5445 int status = os::Solaris::mutex_lock(_mutex);
5446 assert_status(status == 0, status, "mutex_lock");
5447 guarantee(_nParked == 0, "invariant");
5448 ++_nParked;
5449 while (_Event < 0) {
5450 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5451 // Treat this the same as if the wait was interrupted
5452 // With usr/lib/lwp going to kernel, always handle ETIME
5453 status = os::Solaris::cond_wait(_cond, _mutex);
5454 if (status == ETIME) status = EINTR;
5455 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5456 }
5457 --_nParked;
5458 _Event = 0;
5459 status = os::Solaris::mutex_unlock(_mutex);
5460 assert_status(status == 0, status, "mutex_unlock");
5461 // Paranoia to ensure our locked and lock-free paths interact
5462 // correctly with each other.
5463 OrderAccess::fence();
5464 }
5465 }
5466
5467 int os::PlatformEvent::park(jlong millis) {
5468 // Transitions for _Event:
5469 // -1 => -1 : illegal
5470 // 1 => 0 : pass - return immediately
5471 // 0 => -1 : block; then set _Event to 0 before returning
5472
5473 guarantee(_nParked == 0, "invariant");
5474 int v;
5475 for (;;) {
5476 v = _Event;
5477 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5478 }
5479 guarantee(v >= 0, "invariant");
5480 if (v != 0) return OS_OK;
5481
5482 int ret = OS_TIMEOUT;
5483 timestruc_t abst;
5484 compute_abstime(&abst, millis);
5485
5486 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5487 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5488 // Only for SPARC >= V8PlusA
5489 #if defined(__sparc) && defined(COMPILER2)
5490 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5491 #endif
5492 int status = os::Solaris::mutex_lock(_mutex);
5493 assert_status(status == 0, status, "mutex_lock");
5494 guarantee(_nParked == 0, "invariant");
5495 ++_nParked;
5496 while (_Event < 0) {
5497 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5498 assert_status(status == 0 || status == EINTR ||
5499 status == ETIME || status == ETIMEDOUT,
5500 status, "cond_timedwait");
5501 if (!FilterSpuriousWakeups) break; // previous semantics
5502 if (status == ETIME || status == ETIMEDOUT) break;
5503 // We consume and ignore EINTR and spurious wakeups.
5504 }
5505 --_nParked;
5506 if (_Event >= 0) ret = OS_OK;
5507 _Event = 0;
5508 status = os::Solaris::mutex_unlock(_mutex);
5509 assert_status(status == 0, status, "mutex_unlock");
5510 // Paranoia to ensure our locked and lock-free paths interact
5511 // correctly with each other.
5512 OrderAccess::fence();
5513 return ret;
5514 }
5515
5516 void os::PlatformEvent::unpark() {
5517 // Transitions for _Event:
5518 // 0 => 1 : just return
5519 // 1 => 1 : just return
5520 // -1 => either 0 or 1; must signal target thread
5521 // That is, we can safely transition _Event from -1 to either
5522 // 0 or 1.
5523 // See also: "Semaphores in Plan 9" by Mullender & Cox
5524 //
5525 // Note: Forcing a transition from "-1" to "1" on an unpark() means
5526 // that it will take two back-to-back park() calls for the owning
5527 // thread to block. This has the benefit of forcing a spurious return
5528 // from the first park() call after an unpark() call which will help
5529 // shake out uses of park() and unpark() without condition variables.
5530
5531 if (Atomic::xchg(1, &_Event) >= 0) return;
5532
5533 // If the thread associated with the event was parked, wake it.
5534 // Wait for the thread assoc with the PlatformEvent to vacate.
5535 int status = os::Solaris::mutex_lock(_mutex);
5536 assert_status(status == 0, status, "mutex_lock");
5537 int AnyWaiters = _nParked;
5538 status = os::Solaris::mutex_unlock(_mutex);
5539 assert_status(status == 0, status, "mutex_unlock");
5540 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
5541 if (AnyWaiters != 0) {
5542 // Note that we signal() *after* dropping the lock for "immortal" Events.
5543 // This is safe and avoids a common class of futile wakeups. In rare
5544 // circumstances this can cause a thread to return prematurely from
5545 // cond_{timed}wait() but the spurious wakeup is benign and the victim
5546 // will simply re-test the condition and re-park itself.
5547 // This provides particular benefit if the underlying platform does not
5548 // provide wait morphing.
5549 status = os::Solaris::cond_signal(_cond);
5550 assert_status(status == 0, status, "cond_signal");
5551 }
5552 }
5553
5554 // JSR166
5555 // -------------------------------------------------------
5556
5557 // The solaris and linux implementations of park/unpark are fairly
5558 // conservative for now, but can be improved. They currently use a
5559 // mutex/condvar pair, plus _counter.
5560 // Park decrements _counter if > 0, else does a condvar wait. Unpark
5561 // sets count to 1 and signals condvar. Only one thread ever waits
5562 // on the condvar. Contention seen when trying to park implies that someone
5563 // is unparking you, so don't wait. And spurious returns are fine, so there
5564 // is no need to track notifications.
5565
5566 #define MAX_SECS 100000000
5567
5568 // This code is common to linux and solaris and will be moved to a
5569 // common place in dolphin.
5570 //
5571 // The passed in time value is either a relative time in nanoseconds
5572 // or an absolute time in milliseconds. Either way it has to be unpacked
5573 // into suitable seconds and nanoseconds components and stored in the
5574 // given timespec structure.
5575 // Given time is a 64-bit value and the time_t used in the timespec is only
5576 // a signed-32-bit value (except on 64-bit Linux) we have to watch for
5577 // overflow if times way in the future are given. Further on Solaris versions
5578 // prior to 10 there is a restriction (see cond_timedwait) that the specified
5579 // number of seconds, in abstime, is less than current_time + 100,000,000.
5580 // As it will be 28 years before "now + 100000000" will overflow we can
5581 // ignore overflow and just impose a hard-limit on seconds using the value
5582 // of "now + 100,000,000". This places a limit on the timeout of about 3.17
5583 // years from "now".
5584 //
5585 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5586 assert(time > 0, "convertTime");
5587
5588 struct timeval now;
5589 int status = gettimeofday(&now, NULL);
5590 assert(status == 0, "gettimeofday");
5591
5592 time_t max_secs = now.tv_sec + MAX_SECS;
5593
5594 if (isAbsolute) {
5595 jlong secs = time / 1000;
5596 if (secs > max_secs) {
5597 absTime->tv_sec = max_secs;
5598 } else {
5599 absTime->tv_sec = secs;
5600 }
5601 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5602 } else {
5603 jlong secs = time / NANOSECS_PER_SEC;
5604 if (secs >= MAX_SECS) {
5605 absTime->tv_sec = max_secs;
5606 absTime->tv_nsec = 0;
5607 } else {
5608 absTime->tv_sec = now.tv_sec + secs;
5609 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5610 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5611 absTime->tv_nsec -= NANOSECS_PER_SEC;
5612 ++absTime->tv_sec; // note: this must be <= max_secs
5613 }
5614 }
5615 }
5616 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5617 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5618 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5619 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5620 }
5621
5622 void Parker::park(bool isAbsolute, jlong time) {
5623 // Ideally we'd do something useful while spinning, such
5624 // as calling unpackTime().
5625
5626 // Optional fast-path check:
5627 // Return immediately if a permit is available.
5628 // We depend on Atomic::xchg() having full barrier semantics
5629 // since we are doing a lock-free update to _counter.
5630 if (Atomic::xchg(0, &_counter) > 0) return;
5631
5632 // Optional fast-exit: Check interrupt before trying to wait
5633 Thread* thread = Thread::current();
5634 assert(thread->is_Java_thread(), "Must be JavaThread");
5635 JavaThread *jt = (JavaThread *)thread;
5636 if (Thread::is_interrupted(thread, false)) {
5637 return;
5638 }
5639
5640 // First, demultiplex/decode time arguments
5641 timespec absTime;
5642 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all
5643 return;
5644 }
5645 if (time > 0) {
5646 // Warning: this code might be exposed to the old Solaris time
5647 // round-down bugs. Grep "roundingFix" for details.
5648 unpackTime(&absTime, isAbsolute, time);
5649 }
5650
5651 // Enter safepoint region
5652 // Beware of deadlocks such as 6317397.
5653 // The per-thread Parker:: _mutex is a classic leaf-lock.
5654 // In particular a thread must never block on the Threads_lock while
5655 // holding the Parker:: mutex. If safepoints are pending both the
5656 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
5657 ThreadBlockInVM tbivm(jt);
5658
5659 // Don't wait if cannot get lock since interference arises from
5660 // unblocking. Also. check interrupt before trying wait
5661 if (Thread::is_interrupted(thread, false) ||
5662 os::Solaris::mutex_trylock(_mutex) != 0) {
5663 return;
5664 }
5665
5666 int status;
5667
5668 if (_counter > 0) { // no wait needed
5669 _counter = 0;
5670 status = os::Solaris::mutex_unlock(_mutex);
5671 assert(status == 0, "invariant");
5672 // Paranoia to ensure our locked and lock-free paths interact
5673 // correctly with each other and Java-level accesses.
5674 OrderAccess::fence();
5675 return;
5676 }
5677
5678 #ifdef ASSERT
5679 // Don't catch signals while blocked; let the running threads have the signals.
5680 // (This allows a debugger to break into the running thread.)
5681 sigset_t oldsigs;
5682 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
5683 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
5684 #endif
5685
5686 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
5687 jt->set_suspend_equivalent();
5688 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
5689
5690 // Do this the hard way by blocking ...
5691 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5692 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5693 // Only for SPARC >= V8PlusA
5694 #if defined(__sparc) && defined(COMPILER2)
5695 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5696 #endif
5697
5698 if (time == 0) {
5699 status = os::Solaris::cond_wait(_cond, _mutex);
5700 } else {
5701 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
5702 }
5703 // Note that an untimed cond_wait() can sometimes return ETIME on older
5704 // versions of the Solaris.
5705 assert_status(status == 0 || status == EINTR ||
5706 status == ETIME || status == ETIMEDOUT,
5707 status, "cond_timedwait");
5708
5709 #ifdef ASSERT
5710 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
5711 #endif
5712 _counter = 0;
5713 status = os::Solaris::mutex_unlock(_mutex);
5714 assert_status(status == 0, status, "mutex_unlock");
5715 // Paranoia to ensure our locked and lock-free paths interact
5716 // correctly with each other and Java-level accesses.
5717 OrderAccess::fence();
5718
5719 // If externally suspended while waiting, re-suspend
5720 if (jt->handle_special_suspend_equivalent_condition()) {
5721 jt->java_suspend_self();
5722 }
5723 }
5724
5725 void Parker::unpark() {
5726 int status = os::Solaris::mutex_lock(_mutex);
5727 assert(status == 0, "invariant");
5728 const int s = _counter;
5729 _counter = 1;
5730 status = os::Solaris::mutex_unlock(_mutex);
5731 assert(status == 0, "invariant");
5732
5733 if (s < 1) {
5734 status = os::Solaris::cond_signal(_cond);
5735 assert(status == 0, "invariant");
5736 }
5737 }
5738
5739 extern char** environ;
5740
5741 // Run the specified command in a separate process. Return its exit value,
5742 // or -1 on failure (e.g. can't fork a new process).
5743 // Unlike system(), this function can be called from signal handler. It
5744 // doesn't block SIGINT et al.
5745 int os::fork_and_exec(char* cmd) {
5746 char * argv[4];
5747 argv[0] = (char *)"sh";
5748 argv[1] = (char *)"-c";
5749 argv[2] = cmd;
5750 argv[3] = NULL;
5751
5752 // fork is async-safe, fork1 is not so can't use in signal handler
5753 pid_t pid;
5754 Thread* t = ThreadLocalStorage::get_thread_slow();
5755 if (t != NULL && t->is_inside_signal_handler()) {
5756 pid = fork();
5757 } else {
5758 pid = fork1();
5759 }
5760
5761 if (pid < 0) {
5762 // fork failed
5763 warning("fork failed: %s", strerror(errno));
5764 return -1;
5765
5766 } else if (pid == 0) {
5767 // child process
5768
5769 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
5770 execve("/usr/bin/sh", argv, environ);
5771
5772 // execve failed
5773 _exit(-1);
5774
5775 } else {
5776 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5777 // care about the actual exit code, for now.
5778
5779 int status;
5780
5781 // Wait for the child process to exit. This returns immediately if
5782 // the child has already exited. */
5783 while (waitpid(pid, &status, 0) < 0) {
5784 switch (errno) {
5785 case ECHILD: return 0;
5786 case EINTR: break;
5787 default: return -1;
5788 }
5789 }
5790
5791 if (WIFEXITED(status)) {
5792 // The child exited normally; get its exit code.
5793 return WEXITSTATUS(status);
5794 } else if (WIFSIGNALED(status)) {
5795 // The child exited because of a signal
5796 // The best value to return is 0x80 + signal number,
5797 // because that is what all Unix shells do, and because
5798 // it allows callers to distinguish between process exit and
5799 // process death by signal.
5800 return 0x80 + WTERMSIG(status);
5801 } else {
5802 // Unknown exit code; pass it through
5803 return status;
5804 }
5805 }
5806 }
5807
5808 // is_headless_jre()
5809 //
5810 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
5811 // in order to report if we are running in a headless jre
5812 //
5813 // Since JDK8 xawt/libmawt.so was moved into the same directory
5814 // as libawt.so, and renamed libawt_xawt.so
5815 //
5816 bool os::is_headless_jre() {
5817 struct stat statbuf;
5818 char buf[MAXPATHLEN];
5819 char libmawtpath[MAXPATHLEN];
5820 const char *xawtstr = "/xawt/libmawt.so";
5821 const char *new_xawtstr = "/libawt_xawt.so";
5822 char *p;
5823
5824 // Get path to libjvm.so
5825 os::jvm_path(buf, sizeof(buf));
5826
5827 // Get rid of libjvm.so
5828 p = strrchr(buf, '/');
5829 if (p == NULL) {
5830 return false;
5831 } else {
5832 *p = '\0';
5833 }
5834
5835 // Get rid of client or server
5836 p = strrchr(buf, '/');
5837 if (p == NULL) {
5838 return false;
5839 } else {
5840 *p = '\0';
5841 }
5842
5843 // check xawt/libmawt.so
5844 strcpy(libmawtpath, buf);
5845 strcat(libmawtpath, xawtstr);
5846 if (::stat(libmawtpath, &statbuf) == 0) return false;
5847
5848 // check libawt_xawt.so
5849 strcpy(libmawtpath, buf);
5850 strcat(libmawtpath, new_xawtstr);
5851 if (::stat(libmawtpath, &statbuf) == 0) return false;
5852
5853 return true;
5854 }
5855
5856 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
5857 size_t res;
5858 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5859 "Assumed _thread_in_native");
5860 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
5861 return res;
5862 }
5863
5864 int os::close(int fd) {
5865 return ::close(fd);
5866 }
5867
5868 int os::socket_close(int fd) {
5869 return ::close(fd);
5870 }
5871
5872 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
5873 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5874 "Assumed _thread_in_native");
5875 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags));
5876 }
5877
5878 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
5879 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5880 "Assumed _thread_in_native");
5881 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5882 }
5883
5884 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
5885 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5886 }
5887
5888 // As both poll and select can be interrupted by signals, we have to be
5889 // prepared to restart the system call after updating the timeout, unless
5890 // a poll() is done with timeout == -1, in which case we repeat with this
5891 // "wait forever" value.
5892
5893 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
5894 int _result;
5895 _result = ::connect(fd, him, len);
5896
5897 // On Solaris, when a connect() call is interrupted, the connection
5898 // can be established asynchronously (see 6343810). Subsequent calls
5899 // to connect() must check the errno value which has the semantic
5900 // described below (copied from the connect() man page). Handling
5901 // of asynchronously established connections is required for both
5902 // blocking and non-blocking sockets.
5903 // EINTR The connection attempt was interrupted
5904 // before any data arrived by the delivery of
5905 // a signal. The connection, however, will be
5906 // established asynchronously.
5907 //
5908 // EINPROGRESS The socket is non-blocking, and the connec-
5909 // tion cannot be completed immediately.
5910 //
5911 // EALREADY The socket is non-blocking, and a previous
5912 // connection attempt has not yet been com-
5913 // pleted.
5914 //
5915 // EISCONN The socket is already connected.
5916 if (_result == OS_ERR && errno == EINTR) {
5917 // restarting a connect() changes its errno semantics
5918 RESTARTABLE(::connect(fd, him, len), _result);
5919 // undo these changes
5920 if (_result == OS_ERR) {
5921 if (errno == EALREADY) {
5922 errno = EINPROGRESS; // fall through
5923 } else if (errno == EISCONN) {
5924 errno = 0;
5925 return OS_OK;
5926 }
5927 }
5928 }
5929 return _result;
5930 }
5931
5932 // Get the default path to the core file
5933 // Returns the length of the string
5934 int os::get_core_path(char* buffer, size_t bufferSize) {
5935 const char* p = get_current_directory(buffer, bufferSize);
5936
5937 if (p == NULL) {
5938 assert(p != NULL, "failed to get current directory");
5939 return 0;
5940 }
5941
5942 jio_snprintf(buffer, bufferSize, "%s/core or core.%d",
5943 p, current_process_id());
5944
5945 return strlen(buffer);
5946 }
5947
5948 #ifndef PRODUCT
5949 void TestReserveMemorySpecial_test() {
5950 // No tests available for this platform
5951 }
5952 #endif