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 "services/attachListener.hpp"
64 #include "services/memTracker.hpp"
65 #include "services/runtimeService.hpp"
66 #include "utilities/decoder.hpp"
67 #include "utilities/defaultStream.hpp"
68 #include "utilities/events.hpp"
69 #include "utilities/growableArray.hpp"
70 #include "utilities/vmError.hpp"
71
72 // put OS-includes here
73 # include <dlfcn.h>
74 # include <errno.h>
75 # include <exception>
76 # include <link.h>
77 # include <poll.h>
78 # include <pthread.h>
79 # include <pwd.h>
80 # include <schedctl.h>
81 # include <setjmp.h>
82 # include <signal.h>
83 # include <stdio.h>
84 # include <alloca.h>
85 # include <sys/filio.h>
86 # include <sys/ipc.h>
87 # include <sys/lwp.h>
88 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
89 # include <sys/mman.h>
90 # include <sys/processor.h>
91 # include <sys/procset.h>
92 # include <sys/pset.h>
93 # include <sys/resource.h>
94 # include <sys/shm.h>
95 # include <sys/socket.h>
96 # include <sys/stat.h>
97 # include <sys/systeminfo.h>
98 # include <sys/time.h>
99 # include <sys/times.h>
100 # include <sys/types.h>
101 # include <sys/wait.h>
102 # include <sys/utsname.h>
103 # include <thread.h>
104 # include <unistd.h>
105 # include <sys/priocntl.h>
106 # include <sys/rtpriocntl.h>
107 # include <sys/tspriocntl.h>
108 # include <sys/iapriocntl.h>
109 # include <sys/fxpriocntl.h>
110 # include <sys/loadavg.h>
111 # include <string.h>
112 # include <stdio.h>
113
114 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
115 # include <sys/procfs.h> // see comment in <sys/procfs.h>
116
117 #define MAX_PATH (2 * K)
118
119 // for timer info max values which include all bits
120 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
121
122
123 // Here are some liblgrp types from sys/lgrp_user.h to be able to
124 // compile on older systems without this header file.
125
126 #ifndef MADV_ACCESS_LWP
127 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
128 #endif
129 #ifndef MADV_ACCESS_MANY
130 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */
131 #endif
132
133 #ifndef LGRP_RSRC_CPU
134 #define LGRP_RSRC_CPU 0 /* CPU resources */
135 #endif
136 #ifndef LGRP_RSRC_MEM
137 #define LGRP_RSRC_MEM 1 /* memory resources */
138 #endif
139
140 // see thr_setprio(3T) for the basis of these numbers
141 #define MinimumPriority 0
142 #define NormalPriority 64
143 #define MaximumPriority 127
144
145 // Values for ThreadPriorityPolicy == 1
146 int prio_policy1[CriticalPriority+1] = {
147 -99999, 0, 16, 32, 48, 64,
148 80, 96, 112, 124, 127, 127 };
149
150 // System parameters used internally
151 static clock_t clock_tics_per_sec = 100;
152
153 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
154 static bool enabled_extended_FILE_stdio = false;
155
156 // For diagnostics to print a message once. see run_periodic_checks
157 static bool check_addr0_done = false;
158 static sigset_t check_signal_done;
159 static bool check_signals = true;
160
161 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
162 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
163
164 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
165
166
167 // "default" initializers for missing libc APIs
168 extern "C" {
169 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
170 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
171
172 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
173 static int lwp_cond_destroy(cond_t *cv) { return 0; }
174 }
175
176 // "default" initializers for pthread-based synchronization
177 extern "C" {
178 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
179 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
180 }
181
182 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time);
183
184 // Thread Local Storage
185 // This is common to all Solaris platforms so it is defined here,
186 // in this common file.
187 // The declarations are in the os_cpu threadLS*.hpp files.
188 //
189 // Static member initialization for TLS
190 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
191
192 #ifndef PRODUCT
193 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
194
195 int ThreadLocalStorage::_tcacheHit = 0;
196 int ThreadLocalStorage::_tcacheMiss = 0;
197
198 void ThreadLocalStorage::print_statistics() {
199 int total = _tcacheMiss+_tcacheHit;
200 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
201 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
202 }
203 #undef _PCT
204 #endif // PRODUCT
205
206 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
207 int index) {
208 Thread *thread = get_thread_slow();
209 if (thread != NULL) {
210 address sp = os::current_stack_pointer();
211 guarantee(thread->_stack_base == NULL ||
212 (sp <= thread->_stack_base &&
213 sp >= thread->_stack_base - thread->_stack_size) ||
214 is_error_reported(),
215 "sp must be inside of selected thread stack");
216
217 thread->set_self_raw_id(raw_id); // mark for quick retrieval
218 _get_thread_cache[index] = thread;
219 }
220 return thread;
221 }
222
223
224 static const double all_zero[sizeof(Thread) / sizeof(double) + 1] = {0};
225 #define NO_CACHED_THREAD ((Thread*)all_zero)
226
227 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
228
229 // Store the new value before updating the cache to prevent a race
230 // between get_thread_via_cache_slowly() and this store operation.
231 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
232
233 // Update thread cache with new thread if setting on thread create,
234 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
235 uintptr_t raw = pd_raw_thread_id();
236 int ix = pd_cache_index(raw);
237 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
238 }
239
240 void ThreadLocalStorage::pd_init() {
241 for (int i = 0; i < _pd_cache_size; i++) {
242 _get_thread_cache[i] = NO_CACHED_THREAD;
243 }
244 }
245
246 // Invalidate all the caches (happens to be the same as pd_init).
247 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
248
249 #undef NO_CACHED_THREAD
250
251 // END Thread Local Storage
252
253 static inline size_t adjust_stack_size(address base, size_t size) {
254 if ((ssize_t)size < 0) {
255 // 4759953: Compensate for ridiculous stack size.
256 size = max_intx;
257 }
258 if (size > (size_t)base) {
259 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
260 size = (size_t)base;
261 }
262 return size;
263 }
264
265 static inline stack_t get_stack_info() {
266 stack_t st;
267 int retval = thr_stksegment(&st);
268 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
269 assert(retval == 0, "incorrect return value from thr_stksegment");
270 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
271 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
272 return st;
273 }
274
275 address os::current_stack_base() {
276 int r = thr_main();
277 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
278 bool is_primordial_thread = r;
279
280 // Workaround 4352906, avoid calls to thr_stksegment by
281 // thr_main after the first one (it looks like we trash
282 // some data, causing the value for ss_sp to be incorrect).
283 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
284 stack_t st = get_stack_info();
285 if (is_primordial_thread) {
286 // cache initial value of stack base
287 os::Solaris::_main_stack_base = (address)st.ss_sp;
288 }
289 return (address)st.ss_sp;
290 } else {
291 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
292 return os::Solaris::_main_stack_base;
293 }
294 }
295
296 size_t os::current_stack_size() {
297 size_t size;
298
299 int r = thr_main();
300 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
301 if (!r) {
302 size = get_stack_info().ss_size;
303 } else {
304 struct rlimit limits;
305 getrlimit(RLIMIT_STACK, &limits);
306 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
307 }
308 // base may not be page aligned
309 address base = current_stack_base();
310 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
311 return (size_t)(base - bottom);
312 }
313
314 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
315 return localtime_r(clock, res);
316 }
317
318 void os::Solaris::try_enable_extended_io() {
319 typedef int (*enable_extended_FILE_stdio_t)(int, int);
320
321 if (!UseExtendedFileIO) {
322 return;
323 }
324
325 enable_extended_FILE_stdio_t enabler =
326 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
327 "enable_extended_FILE_stdio");
328 if (enabler) {
329 enabler(-1, -1);
330 }
331 }
332
333 static int _processors_online = 0;
334
335 jint os::Solaris::_os_thread_limit = 0;
336 volatile jint os::Solaris::_os_thread_count = 0;
337
338 julong os::available_memory() {
339 return Solaris::available_memory();
340 }
341
342 julong os::Solaris::available_memory() {
343 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
344 }
345
346 julong os::Solaris::_physical_memory = 0;
347
348 julong os::physical_memory() {
349 return Solaris::physical_memory();
350 }
351
352 static hrtime_t first_hrtime = 0;
353 static const hrtime_t hrtime_hz = 1000*1000*1000;
354 static volatile hrtime_t max_hrtime = 0;
355
356
357 void os::Solaris::initialize_system_info() {
358 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
359 _processors_online = sysconf(_SC_NPROCESSORS_ONLN);
360 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) *
361 (julong)sysconf(_SC_PAGESIZE);
362 }
363
364 int os::active_processor_count() {
365 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
366 pid_t pid = getpid();
367 psetid_t pset = PS_NONE;
368 // Are we running in a processor set or is there any processor set around?
369 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
370 uint_t pset_cpus;
371 // Query the number of cpus available to us.
372 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
373 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
374 _processors_online = pset_cpus;
375 return pset_cpus;
376 }
377 }
378 // Otherwise return number of online cpus
379 return online_cpus;
380 }
381
382 static bool find_processors_in_pset(psetid_t pset,
383 processorid_t** id_array,
384 uint_t* id_length) {
385 bool result = false;
386 // Find the number of processors in the processor set.
387 if (pset_info(pset, NULL, id_length, NULL) == 0) {
388 // Make up an array to hold their ids.
389 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
390 // Fill in the array with their processor ids.
391 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
392 result = true;
393 }
394 }
395 return result;
396 }
397
398 // Callers of find_processors_online() must tolerate imprecise results --
399 // the system configuration can change asynchronously because of DR
400 // or explicit psradm operations.
401 //
402 // We also need to take care that the loop (below) terminates as the
403 // number of processors online can change between the _SC_NPROCESSORS_ONLN
404 // request and the loop that builds the list of processor ids. Unfortunately
405 // there's no reliable way to determine the maximum valid processor id,
406 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
407 // man pages, which claim the processor id set is "sparse, but
408 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
409 // exit the loop.
410 //
411 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
412 // not available on S8.0.
413
414 static bool find_processors_online(processorid_t** id_array,
415 uint* id_length) {
416 const processorid_t MAX_PROCESSOR_ID = 100000;
417 // Find the number of processors online.
418 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
419 // Make up an array to hold their ids.
420 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
421 // Processors need not be numbered consecutively.
422 long found = 0;
423 processorid_t next = 0;
424 while (found < *id_length && next < MAX_PROCESSOR_ID) {
425 processor_info_t info;
426 if (processor_info(next, &info) == 0) {
427 // NB, PI_NOINTR processors are effectively online ...
428 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
429 (*id_array)[found] = next;
430 found += 1;
431 }
432 }
433 next += 1;
434 }
435 if (found < *id_length) {
436 // The loop above didn't identify the expected number of processors.
437 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
438 // and re-running the loop, above, but there's no guarantee of progress
439 // if the system configuration is in flux. Instead, we just return what
440 // we've got. Note that in the worst case find_processors_online() could
441 // return an empty set. (As a fall-back in the case of the empty set we
442 // could just return the ID of the current processor).
443 *id_length = found;
444 }
445
446 return true;
447 }
448
449 static bool assign_distribution(processorid_t* id_array,
450 uint id_length,
451 uint* distribution,
452 uint distribution_length) {
453 // We assume we can assign processorid_t's to uint's.
454 assert(sizeof(processorid_t) == sizeof(uint),
455 "can't convert processorid_t to uint");
456 // Quick check to see if we won't succeed.
457 if (id_length < distribution_length) {
458 return false;
459 }
460 // Assign processor ids to the distribution.
461 // Try to shuffle processors to distribute work across boards,
462 // assuming 4 processors per board.
463 const uint processors_per_board = ProcessDistributionStride;
464 // Find the maximum processor id.
465 processorid_t max_id = 0;
466 for (uint m = 0; m < id_length; m += 1) {
467 max_id = MAX2(max_id, id_array[m]);
468 }
469 // The next id, to limit loops.
470 const processorid_t limit_id = max_id + 1;
471 // Make up markers for available processors.
472 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
473 for (uint c = 0; c < limit_id; c += 1) {
474 available_id[c] = false;
475 }
476 for (uint a = 0; a < id_length; a += 1) {
477 available_id[id_array[a]] = true;
478 }
479 // Step by "boards", then by "slot", copying to "assigned".
480 // NEEDS_CLEANUP: The assignment of processors should be stateful,
481 // remembering which processors have been assigned by
482 // previous calls, etc., so as to distribute several
483 // independent calls of this method. What we'd like is
484 // It would be nice to have an API that let us ask
485 // how many processes are bound to a processor,
486 // but we don't have that, either.
487 // In the short term, "board" is static so that
488 // subsequent distributions don't all start at board 0.
489 static uint board = 0;
490 uint assigned = 0;
491 // Until we've found enough processors ....
492 while (assigned < distribution_length) {
493 // ... find the next available processor in the board.
494 for (uint slot = 0; slot < processors_per_board; slot += 1) {
495 uint try_id = board * processors_per_board + slot;
496 if ((try_id < limit_id) && (available_id[try_id] == true)) {
497 distribution[assigned] = try_id;
498 available_id[try_id] = false;
499 assigned += 1;
500 break;
501 }
502 }
503 board += 1;
504 if (board * processors_per_board + 0 >= limit_id) {
505 board = 0;
506 }
507 }
508 if (available_id != NULL) {
509 FREE_C_HEAP_ARRAY(bool, available_id);
510 }
511 return true;
512 }
513
514 void os::set_native_thread_name(const char *name) {
515 // Not yet implemented.
516 return;
517 }
518
519 bool os::distribute_processes(uint length, uint* distribution) {
520 bool result = false;
521 // Find the processor id's of all the available CPUs.
522 processorid_t* id_array = NULL;
523 uint id_length = 0;
524 // There are some races between querying information and using it,
525 // since processor sets can change dynamically.
526 psetid_t pset = PS_NONE;
527 // Are we running in a processor set?
528 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
529 result = find_processors_in_pset(pset, &id_array, &id_length);
530 } else {
531 result = find_processors_online(&id_array, &id_length);
532 }
533 if (result == true) {
534 if (id_length >= length) {
535 result = assign_distribution(id_array, id_length, distribution, length);
536 } else {
537 result = false;
538 }
539 }
540 if (id_array != NULL) {
541 FREE_C_HEAP_ARRAY(processorid_t, id_array);
542 }
543 return result;
544 }
545
546 bool os::bind_to_processor(uint processor_id) {
547 // We assume that a processorid_t can be stored in a uint.
548 assert(sizeof(uint) == sizeof(processorid_t),
549 "can't convert uint to processorid_t");
550 int bind_result =
551 processor_bind(P_LWPID, // bind LWP.
552 P_MYID, // bind current LWP.
553 (processorid_t) processor_id, // id.
554 NULL); // don't return old binding.
555 return (bind_result == 0);
556 }
557
558 // Return true if user is running as root.
559
560 bool os::have_special_privileges() {
561 static bool init = false;
562 static bool privileges = false;
563 if (!init) {
564 privileges = (getuid() != geteuid()) || (getgid() != getegid());
565 init = true;
566 }
567 return privileges;
568 }
569
570
571 void os::init_system_properties_values() {
572 // The next steps are taken in the product version:
573 //
574 // Obtain the JAVA_HOME value from the location of libjvm.so.
575 // This library should be located at:
576 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so.
577 //
578 // If "/jre/lib/" appears at the right place in the path, then we
579 // assume libjvm.so is installed in a JDK and we use this path.
580 //
581 // Otherwise exit with message: "Could not create the Java virtual machine."
582 //
583 // The following extra steps are taken in the debugging version:
584 //
585 // If "/jre/lib/" does NOT appear at the right place in the path
586 // instead of exit check for $JAVA_HOME environment variable.
587 //
588 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
589 // then we append a fake suffix "hotspot/libjvm.so" to this path so
590 // it looks like libjvm.so is installed there
591 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so.
592 //
593 // Otherwise exit.
594 //
595 // Important note: if the location of libjvm.so changes this
596 // code needs to be changed accordingly.
597
598 // Base path of extensions installed on the system.
599 #define SYS_EXT_DIR "/usr/jdk/packages"
600 #define EXTENSIONS_DIR "/lib/ext"
601
602 char cpu_arch[12];
603 // Buffer that fits several sprintfs.
604 // Note that the space for the colon and the trailing null are provided
605 // by the nulls included by the sizeof operator.
606 const size_t bufsize =
607 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends.
608 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path
609 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir
610 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal);
611
612 // sysclasspath, java_home, dll_dir
613 {
614 char *pslash;
615 os::jvm_path(buf, bufsize);
616
617 // Found the full path to libjvm.so.
618 // Now cut the path to <java_home>/jre if we can.
619 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so.
620 pslash = strrchr(buf, '/');
621 if (pslash != NULL) {
622 *pslash = '\0'; // Get rid of /{client|server|hotspot}.
623 }
624 Arguments::set_dll_dir(buf);
625
626 if (pslash != NULL) {
627 pslash = strrchr(buf, '/');
628 if (pslash != NULL) {
629 *pslash = '\0'; // Get rid of /<arch>.
630 pslash = strrchr(buf, '/');
631 if (pslash != NULL) {
632 *pslash = '\0'; // Get rid of /lib.
633 }
634 }
635 }
636 Arguments::set_java_home(buf);
637 set_boot_path('/', ':');
638 }
639
640 // Where to look for native libraries.
641 {
642 // Use dlinfo() to determine the correct java.library.path.
643 //
644 // If we're launched by the Java launcher, and the user
645 // does not set java.library.path explicitly on the commandline,
646 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
647 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
648 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
649 // /usr/lib), which is exactly what we want.
650 //
651 // If the user does set java.library.path, it completely
652 // overwrites this setting, and always has.
653 //
654 // If we're not launched by the Java launcher, we may
655 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
656 // settings. Again, dlinfo does exactly what we want.
657
658 Dl_serinfo info_sz, *info = &info_sz;
659 Dl_serpath *path;
660 char *library_path;
661 char *common_path = buf;
662
663 // Determine search path count and required buffer size.
664 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
665 FREE_C_HEAP_ARRAY(char, buf);
666 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
667 }
668
669 // Allocate new buffer and initialize.
670 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal);
671 info->dls_size = info_sz.dls_size;
672 info->dls_cnt = info_sz.dls_cnt;
673
674 // Obtain search path information.
675 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
676 FREE_C_HEAP_ARRAY(char, buf);
677 FREE_C_HEAP_ARRAY(char, info);
678 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
679 }
680
681 path = &info->dls_serpath[0];
682
683 // Note: Due to a legacy implementation, most of the library path
684 // is set in the launcher. This was to accomodate linking restrictions
685 // on legacy Solaris implementations (which are no longer supported).
686 // Eventually, all the library path setting will be done here.
687 //
688 // However, to prevent the proliferation of improperly built native
689 // libraries, the new path component /usr/jdk/packages is added here.
690
691 // Determine the actual CPU architecture.
692 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
693 #ifdef _LP64
694 // If we are a 64-bit vm, perform the following translations:
695 // sparc -> sparcv9
696 // i386 -> amd64
697 if (strcmp(cpu_arch, "sparc") == 0) {
698 strcat(cpu_arch, "v9");
699 } else if (strcmp(cpu_arch, "i386") == 0) {
700 strcpy(cpu_arch, "amd64");
701 }
702 #endif
703
704 // Construct the invariant part of ld_library_path.
705 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch);
706
707 // Struct size is more than sufficient for the path components obtained
708 // through the dlinfo() call, so only add additional space for the path
709 // components explicitly added here.
710 size_t library_path_size = info->dls_size + strlen(common_path);
711 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal);
712 library_path[0] = '\0';
713
714 // Construct the desired Java library path from the linker's library
715 // search path.
716 //
717 // For compatibility, it is optimal that we insert the additional path
718 // components specific to the Java VM after those components specified
719 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
720 // infrastructure.
721 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it.
722 strcpy(library_path, common_path);
723 } else {
724 int inserted = 0;
725 int i;
726 for (i = 0; i < info->dls_cnt; i++, path++) {
727 uint_t flags = path->dls_flags & LA_SER_MASK;
728 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
729 strcat(library_path, common_path);
730 strcat(library_path, os::path_separator());
731 inserted = 1;
732 }
733 strcat(library_path, path->dls_name);
734 strcat(library_path, os::path_separator());
735 }
736 // Eliminate trailing path separator.
737 library_path[strlen(library_path)-1] = '\0';
738 }
739
740 // happens before argument parsing - can't use a trace flag
741 // tty->print_raw("init_system_properties_values: native lib path: ");
742 // tty->print_raw_cr(library_path);
743
744 // Callee copies into its own buffer.
745 Arguments::set_library_path(library_path);
746
747 FREE_C_HEAP_ARRAY(char, library_path);
748 FREE_C_HEAP_ARRAY(char, info);
749 }
750
751 // Extensions directories.
752 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home());
753 Arguments::set_ext_dirs(buf);
754
755 FREE_C_HEAP_ARRAY(char, buf);
756
757 #undef SYS_EXT_DIR
758 #undef EXTENSIONS_DIR
759 }
760
761 void os::breakpoint() {
762 BREAKPOINT;
763 }
764
765 bool os::obsolete_option(const JavaVMOption *option) {
766 if (!strncmp(option->optionString, "-Xt", 3)) {
767 return true;
768 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
769 return true;
770 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
771 return true;
772 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
773 return true;
774 }
775 return false;
776 }
777
778 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
779 address stackStart = (address)thread->stack_base();
780 address stackEnd = (address)(stackStart - (address)thread->stack_size());
781 if (sp < stackStart && sp >= stackEnd) return true;
782 return false;
783 }
784
785 extern "C" void breakpoint() {
786 // use debugger to set breakpoint here
787 }
788
789 static thread_t main_thread;
790
791 // Thread start routine for all new Java threads
792 extern "C" void* java_start(void* thread_addr) {
793 // Try to randomize the cache line index of hot stack frames.
794 // This helps when threads of the same stack traces evict each other's
795 // cache lines. The threads can be either from the same JVM instance, or
796 // from different JVM instances. The benefit is especially true for
797 // processors with hyperthreading technology.
798 static int counter = 0;
799 int pid = os::current_process_id();
800 alloca(((pid ^ counter++) & 7) * 128);
801
802 int prio;
803 Thread* thread = (Thread*)thread_addr;
804 OSThread* osthr = thread->osthread();
805
806 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound
807 thread->_schedctl = (void *) schedctl_init();
808
809 if (UseNUMA) {
810 int lgrp_id = os::numa_get_group_id();
811 if (lgrp_id != -1) {
812 thread->set_lgrp_id(lgrp_id);
813 }
814 }
815
816 // If the creator called set priority before we started,
817 // we need to call set_native_priority now that we have an lwp.
818 // We used to get the priority from thr_getprio (we called
819 // thr_setprio way back in create_thread) and pass it to
820 // set_native_priority, but Solaris scales the priority
821 // in java_to_os_priority, so when we read it back here,
822 // we pass trash to set_native_priority instead of what's
823 // in java_to_os_priority. So we save the native priority
824 // in the osThread and recall it here.
825
826 if (osthr->thread_id() != -1) {
827 if (UseThreadPriorities) {
828 int prio = osthr->native_priority();
829 if (ThreadPriorityVerbose) {
830 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
831 INTPTR_FORMAT ", setting priority: %d\n",
832 osthr->thread_id(), osthr->lwp_id(), prio);
833 }
834 os::set_native_priority(thread, prio);
835 }
836 } else if (ThreadPriorityVerbose) {
837 warning("Can't set priority in _start routine, thread id hasn't been set\n");
838 }
839
840 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
841
842 // initialize signal mask for this thread
843 os::Solaris::hotspot_sigmask(thread);
844
845 thread->run();
846
847 // One less thread is executing
848 // When the VMThread gets here, the main thread may have already exited
849 // which frees the CodeHeap containing the Atomic::dec code
850 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
851 Atomic::dec(&os::Solaris::_os_thread_count);
852 }
853
854 if (UseDetachedThreads) {
855 thr_exit(NULL);
856 ShouldNotReachHere();
857 }
858 return NULL;
859 }
860
861 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
862 // Allocate the OSThread object
863 OSThread* osthread = new OSThread(NULL, NULL);
864 if (osthread == NULL) return NULL;
865
866 // Store info on the Solaris thread into the OSThread
867 osthread->set_thread_id(thread_id);
868 osthread->set_lwp_id(_lwp_self());
869 thread->_schedctl = (void *) schedctl_init();
870
871 if (UseNUMA) {
872 int lgrp_id = os::numa_get_group_id();
873 if (lgrp_id != -1) {
874 thread->set_lgrp_id(lgrp_id);
875 }
876 }
877
878 if (ThreadPriorityVerbose) {
879 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
880 osthread->thread_id(), osthread->lwp_id());
881 }
882
883 // Initial thread state is INITIALIZED, not SUSPENDED
884 osthread->set_state(INITIALIZED);
885
886 return osthread;
887 }
888
889 void os::Solaris::hotspot_sigmask(Thread* thread) {
890 //Save caller's signal mask
891 sigset_t sigmask;
892 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
893 OSThread *osthread = thread->osthread();
894 osthread->set_caller_sigmask(sigmask);
895
896 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
897 if (!ReduceSignalUsage) {
898 if (thread->is_VM_thread()) {
899 // Only the VM thread handles BREAK_SIGNAL ...
900 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
901 } else {
902 // ... all other threads block BREAK_SIGNAL
903 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
904 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
905 }
906 }
907 }
908
909 bool os::create_attached_thread(JavaThread* thread) {
910 #ifdef ASSERT
911 thread->verify_not_published();
912 #endif
913 OSThread* osthread = create_os_thread(thread, thr_self());
914 if (osthread == NULL) {
915 return false;
916 }
917
918 // Initial thread state is RUNNABLE
919 osthread->set_state(RUNNABLE);
920 thread->set_osthread(osthread);
921
922 // initialize signal mask for this thread
923 // and save the caller's signal mask
924 os::Solaris::hotspot_sigmask(thread);
925
926 return true;
927 }
928
929 bool os::create_main_thread(JavaThread* thread) {
930 #ifdef ASSERT
931 thread->verify_not_published();
932 #endif
933 if (_starting_thread == NULL) {
934 _starting_thread = create_os_thread(thread, main_thread);
935 if (_starting_thread == NULL) {
936 return false;
937 }
938 }
939
940 // The primodial thread is runnable from the start
941 _starting_thread->set_state(RUNNABLE);
942
943 thread->set_osthread(_starting_thread);
944
945 // initialize signal mask for this thread
946 // and save the caller's signal mask
947 os::Solaris::hotspot_sigmask(thread);
948
949 return true;
950 }
951
952
953 bool os::create_thread(Thread* thread, ThreadType thr_type,
954 size_t stack_size) {
955 // Allocate the OSThread object
956 OSThread* osthread = new OSThread(NULL, NULL);
957 if (osthread == NULL) {
958 return false;
959 }
960
961 if (ThreadPriorityVerbose) {
962 char *thrtyp;
963 switch (thr_type) {
964 case vm_thread:
965 thrtyp = (char *)"vm";
966 break;
967 case cgc_thread:
968 thrtyp = (char *)"cgc";
969 break;
970 case pgc_thread:
971 thrtyp = (char *)"pgc";
972 break;
973 case java_thread:
974 thrtyp = (char *)"java";
975 break;
976 case compiler_thread:
977 thrtyp = (char *)"compiler";
978 break;
979 case watcher_thread:
980 thrtyp = (char *)"watcher";
981 break;
982 default:
983 thrtyp = (char *)"unknown";
984 break;
985 }
986 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
987 }
988
989 // Calculate stack size if it's not specified by caller.
990 if (stack_size == 0) {
991 // The default stack size 1M (2M for LP64).
992 stack_size = (BytesPerWord >> 2) * K * K;
993
994 switch (thr_type) {
995 case os::java_thread:
996 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
997 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
998 break;
999 case os::compiler_thread:
1000 if (CompilerThreadStackSize > 0) {
1001 stack_size = (size_t)(CompilerThreadStackSize * K);
1002 break;
1003 } // else fall through:
1004 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1005 case os::vm_thread:
1006 case os::pgc_thread:
1007 case os::cgc_thread:
1008 case os::watcher_thread:
1009 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1010 break;
1011 }
1012 }
1013 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1014
1015 // Initial state is ALLOCATED but not INITIALIZED
1016 osthread->set_state(ALLOCATED);
1017
1018 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1019 // We got lots of threads. Check if we still have some address space left.
1020 // Need to be at least 5Mb of unreserved address space. We do check by
1021 // trying to reserve some.
1022 const size_t VirtualMemoryBangSize = 20*K*K;
1023 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1024 if (mem == NULL) {
1025 delete osthread;
1026 return false;
1027 } else {
1028 // Release the memory again
1029 os::release_memory(mem, VirtualMemoryBangSize);
1030 }
1031 }
1032
1033 // Setup osthread because the child thread may need it.
1034 thread->set_osthread(osthread);
1035
1036 // Create the Solaris thread
1037 thread_t tid = 0;
1038 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED;
1039 int status;
1040
1041 // Mark that we don't have an lwp or thread id yet.
1042 // In case we attempt to set the priority before the thread starts.
1043 osthread->set_lwp_id(-1);
1044 osthread->set_thread_id(-1);
1045
1046 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1047 if (status != 0) {
1048 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1049 perror("os::create_thread");
1050 }
1051 thread->set_osthread(NULL);
1052 // Need to clean up stuff we've allocated so far
1053 delete osthread;
1054 return false;
1055 }
1056
1057 Atomic::inc(&os::Solaris::_os_thread_count);
1058
1059 // Store info on the Solaris thread into the OSThread
1060 osthread->set_thread_id(tid);
1061
1062 // Remember that we created this thread so we can set priority on it
1063 osthread->set_vm_created();
1064
1065 // Initial thread state is INITIALIZED, not SUSPENDED
1066 osthread->set_state(INITIALIZED);
1067
1068 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1069 return true;
1070 }
1071
1072 // defined for >= Solaris 10. This allows builds on earlier versions
1073 // of Solaris to take advantage of the newly reserved Solaris JVM signals
1074 // With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1075 // and -XX:+UseAltSigs does nothing since these should have no conflict
1076 //
1077 #if !defined(SIGJVM1)
1078 #define SIGJVM1 39
1079 #define SIGJVM2 40
1080 #endif
1081
1082 debug_only(static bool signal_sets_initialized = false);
1083 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1084 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1085 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1086
1087 bool os::Solaris::is_sig_ignored(int sig) {
1088 struct sigaction oact;
1089 sigaction(sig, (struct sigaction*)NULL, &oact);
1090 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1091 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1092 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) {
1093 return true;
1094 } else {
1095 return false;
1096 }
1097 }
1098
1099 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1100 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1101 static bool isJVM1available() {
1102 return SIGJVM1 < SIGRTMIN;
1103 }
1104
1105 void os::Solaris::signal_sets_init() {
1106 // Should also have an assertion stating we are still single-threaded.
1107 assert(!signal_sets_initialized, "Already initialized");
1108 // Fill in signals that are necessarily unblocked for all threads in
1109 // the VM. Currently, we unblock the following signals:
1110 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1111 // by -Xrs (=ReduceSignalUsage));
1112 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1113 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1114 // the dispositions or masks wrt these signals.
1115 // Programs embedding the VM that want to use the above signals for their
1116 // own purposes must, at this time, use the "-Xrs" option to prevent
1117 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1118 // (See bug 4345157, and other related bugs).
1119 // In reality, though, unblocking these signals is really a nop, since
1120 // these signals are not blocked by default.
1121 sigemptyset(&unblocked_sigs);
1122 sigemptyset(&allowdebug_blocked_sigs);
1123 sigaddset(&unblocked_sigs, SIGILL);
1124 sigaddset(&unblocked_sigs, SIGSEGV);
1125 sigaddset(&unblocked_sigs, SIGBUS);
1126 sigaddset(&unblocked_sigs, SIGFPE);
1127
1128 if (isJVM1available) {
1129 os::Solaris::set_SIGinterrupt(SIGJVM1);
1130 os::Solaris::set_SIGasync(SIGJVM2);
1131 } else if (UseAltSigs) {
1132 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1133 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1134 } else {
1135 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1136 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1137 }
1138
1139 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1140 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1141
1142 if (!ReduceSignalUsage) {
1143 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1144 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1145 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1146 }
1147 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1148 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1149 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1150 }
1151 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1152 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1153 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1154 }
1155 }
1156 // Fill in signals that are blocked by all but the VM thread.
1157 sigemptyset(&vm_sigs);
1158 if (!ReduceSignalUsage) {
1159 sigaddset(&vm_sigs, BREAK_SIGNAL);
1160 }
1161 debug_only(signal_sets_initialized = true);
1162
1163 // For diagnostics only used in run_periodic_checks
1164 sigemptyset(&check_signal_done);
1165 }
1166
1167 // These are signals that are unblocked while a thread is running Java.
1168 // (For some reason, they get blocked by default.)
1169 sigset_t* os::Solaris::unblocked_signals() {
1170 assert(signal_sets_initialized, "Not initialized");
1171 return &unblocked_sigs;
1172 }
1173
1174 // These are the signals that are blocked while a (non-VM) thread is
1175 // running Java. Only the VM thread handles these signals.
1176 sigset_t* os::Solaris::vm_signals() {
1177 assert(signal_sets_initialized, "Not initialized");
1178 return &vm_sigs;
1179 }
1180
1181 // These are signals that are blocked during cond_wait to allow debugger in
1182 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1183 assert(signal_sets_initialized, "Not initialized");
1184 return &allowdebug_blocked_sigs;
1185 }
1186
1187
1188 void _handle_uncaught_cxx_exception() {
1189 VMError err("An uncaught C++ exception");
1190 err.report_and_die();
1191 }
1192
1193
1194 // First crack at OS-specific initialization, from inside the new thread.
1195 void os::initialize_thread(Thread* thr) {
1196 int r = thr_main();
1197 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
1198 if (r) {
1199 JavaThread* jt = (JavaThread *)thr;
1200 assert(jt != NULL, "Sanity check");
1201 size_t stack_size;
1202 address base = jt->stack_base();
1203 if (Arguments::created_by_java_launcher()) {
1204 // Use 2MB to allow for Solaris 7 64 bit mode.
1205 stack_size = JavaThread::stack_size_at_create() == 0
1206 ? 2048*K : JavaThread::stack_size_at_create();
1207
1208 // There are rare cases when we may have already used more than
1209 // the basic stack size allotment before this method is invoked.
1210 // Attempt to allow for a normally sized java_stack.
1211 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1212 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1213 } else {
1214 // 6269555: If we were not created by a Java launcher, i.e. if we are
1215 // running embedded in a native application, treat the primordial thread
1216 // as much like a native attached thread as possible. This means using
1217 // the current stack size from thr_stksegment(), unless it is too large
1218 // to reliably setup guard pages. A reasonable max size is 8MB.
1219 size_t current_size = current_stack_size();
1220 // This should never happen, but just in case....
1221 if (current_size == 0) current_size = 2 * K * K;
1222 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1223 }
1224 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1225 stack_size = (size_t)(base - bottom);
1226
1227 assert(stack_size > 0, "Stack size calculation problem");
1228
1229 if (stack_size > jt->stack_size()) {
1230 #ifndef PRODUCT
1231 struct rlimit limits;
1232 getrlimit(RLIMIT_STACK, &limits);
1233 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1234 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1235 #endif
1236 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n"
1237 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1238 "See limit(1) to increase the stack size limit.",
1239 stack_size / K, jt->stack_size() / K);
1240 vm_exit(1);
1241 }
1242 assert(jt->stack_size() >= stack_size,
1243 "Attempt to map more stack than was allocated");
1244 jt->set_stack_size(stack_size);
1245 }
1246
1247 // With the T2 libthread (T1 is no longer supported) threads are always bound
1248 // and we use stackbanging in all cases.
1249
1250 os::Solaris::init_thread_fpu_state();
1251 std::set_terminate(_handle_uncaught_cxx_exception);
1252 }
1253
1254
1255
1256 // Free Solaris resources related to the OSThread
1257 void os::free_thread(OSThread* osthread) {
1258 assert(osthread != NULL, "os::free_thread but osthread not set");
1259
1260
1261 // We are told to free resources of the argument thread,
1262 // but we can only really operate on the current thread.
1263 // The main thread must take the VMThread down synchronously
1264 // before the main thread exits and frees up CodeHeap
1265 guarantee((Thread::current()->osthread() == osthread
1266 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1267 if (Thread::current()->osthread() == osthread) {
1268 // Restore caller's signal mask
1269 sigset_t sigmask = osthread->caller_sigmask();
1270 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1271 }
1272 delete osthread;
1273 }
1274
1275 void os::pd_start_thread(Thread* thread) {
1276 int status = thr_continue(thread->osthread()->thread_id());
1277 assert_status(status == 0, status, "thr_continue failed");
1278 }
1279
1280
1281 intx os::current_thread_id() {
1282 return (intx)thr_self();
1283 }
1284
1285 static pid_t _initial_pid = 0;
1286
1287 int os::current_process_id() {
1288 return (int)(_initial_pid ? _initial_pid : getpid());
1289 }
1290
1291 int os::allocate_thread_local_storage() {
1292 // %%% in Win32 this allocates a memory segment pointed to by a
1293 // register. Dan Stein can implement a similar feature in
1294 // Solaris. Alternatively, the VM can do the same thing
1295 // explicitly: malloc some storage and keep the pointer in a
1296 // register (which is part of the thread's context) (or keep it
1297 // in TLS).
1298 // %%% In current versions of Solaris, thr_self and TSD can
1299 // be accessed via short sequences of displaced indirections.
1300 // The value of thr_self is available as %g7(36).
1301 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1302 // assuming that the current thread already has a value bound to k.
1303 // It may be worth experimenting with such access patterns,
1304 // and later having the parameters formally exported from a Solaris
1305 // interface. I think, however, that it will be faster to
1306 // maintain the invariant that %g2 always contains the
1307 // JavaThread in Java code, and have stubs simply
1308 // treat %g2 as a caller-save register, preserving it in a %lN.
1309 thread_key_t tk;
1310 if (thr_keycreate(&tk, NULL)) {
1311 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1312 "(%s)", strerror(errno)));
1313 }
1314 return int(tk);
1315 }
1316
1317 void os::free_thread_local_storage(int index) {
1318 // %%% don't think we need anything here
1319 // if (pthread_key_delete((pthread_key_t) tk)) {
1320 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1321 // }
1322 }
1323
1324 // libthread allocate for tsd_common is a version specific
1325 // small number - point is NO swap space available
1326 #define SMALLINT 32
1327 void os::thread_local_storage_at_put(int index, void* value) {
1328 // %%% this is used only in threadLocalStorage.cpp
1329 if (thr_setspecific((thread_key_t)index, value)) {
1330 if (errno == ENOMEM) {
1331 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR,
1332 "thr_setspecific: out of swap space");
1333 } else {
1334 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1335 "(%s)", strerror(errno)));
1336 }
1337 } else {
1338 ThreadLocalStorage::set_thread_in_slot((Thread *) value);
1339 }
1340 }
1341
1342 // This function could be called before TLS is initialized, for example, when
1343 // VM receives an async signal or when VM causes a fatal error during
1344 // initialization. Return NULL if thr_getspecific() fails.
1345 void* os::thread_local_storage_at(int index) {
1346 // %%% this is used only in threadLocalStorage.cpp
1347 void* r = NULL;
1348 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1349 }
1350
1351
1352 // gethrtime() should be monotonic according to the documentation,
1353 // but some virtualized platforms are known to break this guarantee.
1354 // getTimeNanos() must be guaranteed not to move backwards, so we
1355 // are forced to add a check here.
1356 inline hrtime_t getTimeNanos() {
1357 const hrtime_t now = gethrtime();
1358 const hrtime_t prev = max_hrtime;
1359 if (now <= prev) {
1360 return prev; // same or retrograde time;
1361 }
1362 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1363 assert(obsv >= prev, "invariant"); // Monotonicity
1364 // If the CAS succeeded then we're done and return "now".
1365 // If the CAS failed and the observed value "obsv" is >= now then
1366 // we should return "obsv". If the CAS failed and now > obsv > prv then
1367 // some other thread raced this thread and installed a new value, in which case
1368 // we could either (a) retry the entire operation, (b) retry trying to install now
1369 // or (c) just return obsv. We use (c). No loop is required although in some cases
1370 // we might discard a higher "now" value in deference to a slightly lower but freshly
1371 // installed obsv value. That's entirely benign -- it admits no new orderings compared
1372 // to (a) or (b) -- and greatly reduces coherence traffic.
1373 // We might also condition (c) on the magnitude of the delta between obsv and now.
1374 // Avoiding excessive CAS operations to hot RW locations is critical.
1375 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate
1376 return (prev == obsv) ? now : obsv;
1377 }
1378
1379 // Time since start-up in seconds to a fine granularity.
1380 // Used by VMSelfDestructTimer and the MemProfiler.
1381 double os::elapsedTime() {
1382 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1383 }
1384
1385 jlong os::elapsed_counter() {
1386 return (jlong)(getTimeNanos() - first_hrtime);
1387 }
1388
1389 jlong os::elapsed_frequency() {
1390 return hrtime_hz;
1391 }
1392
1393 // Return the real, user, and system times in seconds from an
1394 // arbitrary fixed point in the past.
1395 bool os::getTimesSecs(double* process_real_time,
1396 double* process_user_time,
1397 double* process_system_time) {
1398 struct tms ticks;
1399 clock_t real_ticks = times(&ticks);
1400
1401 if (real_ticks == (clock_t) (-1)) {
1402 return false;
1403 } else {
1404 double ticks_per_second = (double) clock_tics_per_sec;
1405 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1406 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1407 // For consistency return the real time from getTimeNanos()
1408 // converted to seconds.
1409 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1410
1411 return true;
1412 }
1413 }
1414
1415 bool os::supports_vtime() { return true; }
1416
1417 bool os::enable_vtime() {
1418 int fd = ::open("/proc/self/ctl", O_WRONLY);
1419 if (fd == -1) {
1420 return false;
1421 }
1422
1423 long cmd[] = { PCSET, PR_MSACCT };
1424 int res = ::write(fd, cmd, sizeof(long) * 2);
1425 ::close(fd);
1426 if (res != sizeof(long) * 2) {
1427 return false;
1428 }
1429 return true;
1430 }
1431
1432 bool os::vtime_enabled() {
1433 int fd = ::open("/proc/self/status", O_RDONLY);
1434 if (fd == -1) {
1435 return false;
1436 }
1437
1438 pstatus_t status;
1439 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1440 ::close(fd);
1441 if (res != sizeof(pstatus_t)) {
1442 return false;
1443 }
1444 return status.pr_flags & PR_MSACCT;
1445 }
1446
1447 double os::elapsedVTime() {
1448 return (double)gethrvtime() / (double)hrtime_hz;
1449 }
1450
1451 // Used internally for comparisons only
1452 // getTimeMillis guaranteed to not move backwards on Solaris
1453 jlong getTimeMillis() {
1454 jlong nanotime = getTimeNanos();
1455 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1456 }
1457
1458 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1459 jlong os::javaTimeMillis() {
1460 timeval t;
1461 if (gettimeofday(&t, NULL) == -1) {
1462 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1463 }
1464 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1465 }
1466
1467 void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) {
1468 timeval t;
1469 if (gettimeofday(&t, NULL) == -1) {
1470 fatal(err_msg("os::javaTimeSystemUTC: gettimeofday (%s)", strerror(errno)));
1471 }
1472 seconds = jlong(t.tv_sec);
1473 nanos = jlong(t.tv_usec) * 1000;
1474 }
1475
1476
1477 jlong os::javaTimeNanos() {
1478 return (jlong)getTimeNanos();
1479 }
1480
1481 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1482 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1483 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1484 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1485 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1486 }
1487
1488 char * os::local_time_string(char *buf, size_t buflen) {
1489 struct tm t;
1490 time_t long_time;
1491 time(&long_time);
1492 localtime_r(&long_time, &t);
1493 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1494 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1495 t.tm_hour, t.tm_min, t.tm_sec);
1496 return buf;
1497 }
1498
1499 // Note: os::shutdown() might be called very early during initialization, or
1500 // called from signal handler. Before adding something to os::shutdown(), make
1501 // sure it is async-safe and can handle partially initialized VM.
1502 void os::shutdown() {
1503
1504 // allow PerfMemory to attempt cleanup of any persistent resources
1505 perfMemory_exit();
1506
1507 // needs to remove object in file system
1508 AttachListener::abort();
1509
1510 // flush buffered output, finish log files
1511 ostream_abort();
1512
1513 // Check for abort hook
1514 abort_hook_t abort_hook = Arguments::abort_hook();
1515 if (abort_hook != NULL) {
1516 abort_hook();
1517 }
1518 }
1519
1520 // Note: os::abort() might be called very early during initialization, or
1521 // called from signal handler. Before adding something to os::abort(), make
1522 // sure it is async-safe and can handle partially initialized VM.
1523 void os::abort(bool dump_core) {
1524 os::shutdown();
1525 if (dump_core) {
1526 #ifndef PRODUCT
1527 fdStream out(defaultStream::output_fd());
1528 out.print_raw("Current thread is ");
1529 char buf[16];
1530 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1531 out.print_raw_cr(buf);
1532 out.print_raw_cr("Dumping core ...");
1533 #endif
1534 ::abort(); // dump core (for debugging)
1535 }
1536
1537 ::exit(1);
1538 }
1539
1540 // Die immediately, no exit hook, no abort hook, no cleanup.
1541 void os::die() {
1542 ::abort(); // dump core (for debugging)
1543 }
1544
1545 // DLL functions
1546
1547 const char* os::dll_file_extension() { return ".so"; }
1548
1549 // This must be hard coded because it's the system's temporary
1550 // directory not the java application's temp directory, ala java.io.tmpdir.
1551 const char* os::get_temp_directory() { return "/tmp"; }
1552
1553 static bool file_exists(const char* filename) {
1554 struct stat statbuf;
1555 if (filename == NULL || strlen(filename) == 0) {
1556 return false;
1557 }
1558 return os::stat(filename, &statbuf) == 0;
1559 }
1560
1561 bool os::dll_build_name(char* buffer, size_t buflen,
1562 const char* pname, const char* fname) {
1563 bool retval = false;
1564 const size_t pnamelen = pname ? strlen(pname) : 0;
1565
1566 // Return error on buffer overflow.
1567 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1568 return retval;
1569 }
1570
1571 if (pnamelen == 0) {
1572 snprintf(buffer, buflen, "lib%s.so", fname);
1573 retval = true;
1574 } else if (strchr(pname, *os::path_separator()) != NULL) {
1575 int n;
1576 char** pelements = split_path(pname, &n);
1577 if (pelements == NULL) {
1578 return false;
1579 }
1580 for (int i = 0; i < n; i++) {
1581 // really shouldn't be NULL but what the heck, check can't hurt
1582 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1583 continue; // skip the empty path values
1584 }
1585 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1586 if (file_exists(buffer)) {
1587 retval = true;
1588 break;
1589 }
1590 }
1591 // release the storage
1592 for (int i = 0; i < n; i++) {
1593 if (pelements[i] != NULL) {
1594 FREE_C_HEAP_ARRAY(char, pelements[i]);
1595 }
1596 }
1597 if (pelements != NULL) {
1598 FREE_C_HEAP_ARRAY(char*, pelements);
1599 }
1600 } else {
1601 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1602 retval = true;
1603 }
1604 return retval;
1605 }
1606
1607 // check if addr is inside libjvm.so
1608 bool os::address_is_in_vm(address addr) {
1609 static address libjvm_base_addr;
1610 Dl_info dlinfo;
1611
1612 if (libjvm_base_addr == NULL) {
1613 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
1614 libjvm_base_addr = (address)dlinfo.dli_fbase;
1615 }
1616 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1617 }
1618
1619 if (dladdr((void *)addr, &dlinfo) != 0) {
1620 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1621 }
1622
1623 return false;
1624 }
1625
1626 typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int);
1627 static dladdr1_func_type dladdr1_func = NULL;
1628
1629 bool os::dll_address_to_function_name(address addr, char *buf,
1630 int buflen, int * offset) {
1631 // buf is not optional, but offset is optional
1632 assert(buf != NULL, "sanity check");
1633
1634 Dl_info dlinfo;
1635
1636 // dladdr1_func was initialized in os::init()
1637 if (dladdr1_func != NULL) {
1638 // yes, we have dladdr1
1639
1640 // Support for dladdr1 is checked at runtime; it may be
1641 // available even if the vm is built on a machine that does
1642 // not have dladdr1 support. Make sure there is a value for
1643 // RTLD_DL_SYMENT.
1644 #ifndef RTLD_DL_SYMENT
1645 #define RTLD_DL_SYMENT 1
1646 #endif
1647 #ifdef _LP64
1648 Elf64_Sym * info;
1649 #else
1650 Elf32_Sym * info;
1651 #endif
1652 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1653 RTLD_DL_SYMENT) != 0) {
1654 // see if we have a matching symbol that covers our address
1655 if (dlinfo.dli_saddr != NULL &&
1656 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1657 if (dlinfo.dli_sname != NULL) {
1658 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1659 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1660 }
1661 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1662 return true;
1663 }
1664 }
1665 // no matching symbol so try for just file info
1666 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1667 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1668 buf, buflen, offset, dlinfo.dli_fname)) {
1669 return true;
1670 }
1671 }
1672 }
1673 buf[0] = '\0';
1674 if (offset != NULL) *offset = -1;
1675 return false;
1676 }
1677
1678 // no, only dladdr is available
1679 if (dladdr((void *)addr, &dlinfo) != 0) {
1680 // see if we have a matching symbol
1681 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
1682 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1683 jio_snprintf(buf, buflen, dlinfo.dli_sname);
1684 }
1685 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1686 return true;
1687 }
1688 // no matching symbol so try for just file info
1689 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1690 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1691 buf, buflen, offset, dlinfo.dli_fname)) {
1692 return true;
1693 }
1694 }
1695 }
1696 buf[0] = '\0';
1697 if (offset != NULL) *offset = -1;
1698 return false;
1699 }
1700
1701 bool os::dll_address_to_library_name(address addr, char* buf,
1702 int buflen, int* offset) {
1703 // buf is not optional, but offset is optional
1704 assert(buf != NULL, "sanity check");
1705
1706 Dl_info dlinfo;
1707
1708 if (dladdr((void*)addr, &dlinfo) != 0) {
1709 if (dlinfo.dli_fname != NULL) {
1710 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1711 }
1712 if (dlinfo.dli_fbase != NULL && offset != NULL) {
1713 *offset = addr - (address)dlinfo.dli_fbase;
1714 }
1715 return true;
1716 }
1717
1718 buf[0] = '\0';
1719 if (offset) *offset = -1;
1720 return false;
1721 }
1722
1723 int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) {
1724 Dl_info dli;
1725 // Sanity check?
1726 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 ||
1727 dli.dli_fname == NULL) {
1728 return 1;
1729 }
1730
1731 void * handle = dlopen(dli.dli_fname, RTLD_LAZY);
1732 if (handle == NULL) {
1733 return 1;
1734 }
1735
1736 Link_map *map;
1737 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1738 if (map == NULL) {
1739 dlclose(handle);
1740 return 1;
1741 }
1742
1743 while (map->l_prev != NULL) {
1744 map = map->l_prev;
1745 }
1746
1747 while (map != NULL) {
1748 // Iterate through all map entries and call callback with fields of interest
1749 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) {
1750 dlclose(handle);
1751 return 1;
1752 }
1753 map = map->l_next;
1754 }
1755
1756 dlclose(handle);
1757 return 0;
1758 }
1759
1760 int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) {
1761 outputStream * out = (outputStream *) param;
1762 out->print_cr(PTR_FORMAT " \t%s", base_address, name);
1763 return 0;
1764 }
1765
1766 void os::print_dll_info(outputStream * st) {
1767 st->print_cr("Dynamic libraries:"); st->flush();
1768 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) {
1769 st->print_cr("Error: Cannot print dynamic libraries.");
1770 }
1771 }
1772
1773 // Loads .dll/.so and
1774 // in case of error it checks if .dll/.so was built for the
1775 // same architecture as Hotspot is running on
1776
1777 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
1778 void * result= ::dlopen(filename, RTLD_LAZY);
1779 if (result != NULL) {
1780 // Successful loading
1781 return result;
1782 }
1783
1784 Elf32_Ehdr elf_head;
1785
1786 // Read system error message into ebuf
1787 // It may or may not be overwritten below
1788 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
1789 ebuf[ebuflen-1]='\0';
1790 int diag_msg_max_length=ebuflen-strlen(ebuf);
1791 char* diag_msg_buf=ebuf+strlen(ebuf);
1792
1793 if (diag_msg_max_length==0) {
1794 // No more space in ebuf for additional diagnostics message
1795 return NULL;
1796 }
1797
1798
1799 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1800
1801 if (file_descriptor < 0) {
1802 // Can't open library, report dlerror() message
1803 return NULL;
1804 }
1805
1806 bool failed_to_read_elf_head=
1807 (sizeof(elf_head)!=
1808 (::read(file_descriptor, &elf_head,sizeof(elf_head))));
1809
1810 ::close(file_descriptor);
1811 if (failed_to_read_elf_head) {
1812 // file i/o error - report dlerror() msg
1813 return NULL;
1814 }
1815
1816 typedef struct {
1817 Elf32_Half code; // Actual value as defined in elf.h
1818 Elf32_Half compat_class; // Compatibility of archs at VM's sense
1819 char elf_class; // 32 or 64 bit
1820 char endianess; // MSB or LSB
1821 char* name; // String representation
1822 } arch_t;
1823
1824 static const arch_t arch_array[]={
1825 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1826 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1827 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
1828 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
1829 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1830 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1831 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
1832 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
1833 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
1834 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
1835 };
1836
1837 #if (defined IA32)
1838 static Elf32_Half running_arch_code=EM_386;
1839 #elif (defined AMD64)
1840 static Elf32_Half running_arch_code=EM_X86_64;
1841 #elif (defined IA64)
1842 static Elf32_Half running_arch_code=EM_IA_64;
1843 #elif (defined __sparc) && (defined _LP64)
1844 static Elf32_Half running_arch_code=EM_SPARCV9;
1845 #elif (defined __sparc) && (!defined _LP64)
1846 static Elf32_Half running_arch_code=EM_SPARC;
1847 #elif (defined __powerpc64__)
1848 static Elf32_Half running_arch_code=EM_PPC64;
1849 #elif (defined __powerpc__)
1850 static Elf32_Half running_arch_code=EM_PPC;
1851 #elif (defined ARM)
1852 static Elf32_Half running_arch_code=EM_ARM;
1853 #else
1854 #error Method os::dll_load requires that one of following is defined:\
1855 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
1856 #endif
1857
1858 // Identify compatability class for VM's architecture and library's architecture
1859 // Obtain string descriptions for architectures
1860
1861 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
1862 int running_arch_index=-1;
1863
1864 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) {
1865 if (running_arch_code == arch_array[i].code) {
1866 running_arch_index = i;
1867 }
1868 if (lib_arch.code == arch_array[i].code) {
1869 lib_arch.compat_class = arch_array[i].compat_class;
1870 lib_arch.name = arch_array[i].name;
1871 }
1872 }
1873
1874 assert(running_arch_index != -1,
1875 "Didn't find running architecture code (running_arch_code) in arch_array");
1876 if (running_arch_index == -1) {
1877 // Even though running architecture detection failed
1878 // we may still continue with reporting dlerror() message
1879 return NULL;
1880 }
1881
1882 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
1883 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
1884 return NULL;
1885 }
1886
1887 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
1888 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
1889 return NULL;
1890 }
1891
1892 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
1893 if (lib_arch.name!=NULL) {
1894 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1895 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
1896 lib_arch.name, arch_array[running_arch_index].name);
1897 } else {
1898 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1899 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
1900 lib_arch.code,
1901 arch_array[running_arch_index].name);
1902 }
1903 }
1904
1905 return NULL;
1906 }
1907
1908 void* os::dll_lookup(void* handle, const char* name) {
1909 return dlsym(handle, name);
1910 }
1911
1912 void* os::get_default_process_handle() {
1913 return (void*)::dlopen(NULL, RTLD_LAZY);
1914 }
1915
1916 int os::stat(const char *path, struct stat *sbuf) {
1917 char pathbuf[MAX_PATH];
1918 if (strlen(path) > MAX_PATH - 1) {
1919 errno = ENAMETOOLONG;
1920 return -1;
1921 }
1922 os::native_path(strcpy(pathbuf, path));
1923 return ::stat(pathbuf, sbuf);
1924 }
1925
1926 static bool _print_ascii_file(const char* filename, outputStream* st) {
1927 int fd = ::open(filename, O_RDONLY);
1928 if (fd == -1) {
1929 return false;
1930 }
1931
1932 char buf[32];
1933 int bytes;
1934 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
1935 st->print_raw(buf, bytes);
1936 }
1937
1938 ::close(fd);
1939
1940 return true;
1941 }
1942
1943 void os::print_os_info_brief(outputStream* st) {
1944 os::Solaris::print_distro_info(st);
1945
1946 os::Posix::print_uname_info(st);
1947
1948 os::Solaris::print_libversion_info(st);
1949 }
1950
1951 void os::print_os_info(outputStream* st) {
1952 st->print("OS:");
1953
1954 os::Solaris::print_distro_info(st);
1955
1956 os::Posix::print_uname_info(st);
1957
1958 os::Solaris::print_libversion_info(st);
1959
1960 os::Posix::print_rlimit_info(st);
1961
1962 os::Posix::print_load_average(st);
1963 }
1964
1965 void os::Solaris::print_distro_info(outputStream* st) {
1966 if (!_print_ascii_file("/etc/release", st)) {
1967 st->print("Solaris");
1968 }
1969 st->cr();
1970 }
1971
1972 void os::Solaris::print_libversion_info(outputStream* st) {
1973 st->print(" (T2 libthread)");
1974 st->cr();
1975 }
1976
1977 static bool check_addr0(outputStream* st) {
1978 jboolean status = false;
1979 int fd = ::open("/proc/self/map",O_RDONLY);
1980 if (fd >= 0) {
1981 prmap_t p;
1982 while (::read(fd, &p, sizeof(p)) > 0) {
1983 if (p.pr_vaddr == 0x0) {
1984 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
1985 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
1986 st->print("Access:");
1987 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
1988 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
1989 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
1990 st->cr();
1991 status = true;
1992 }
1993 }
1994 ::close(fd);
1995 }
1996 return status;
1997 }
1998
1999 void os::pd_print_cpu_info(outputStream* st) {
2000 // Nothing to do for now.
2001 }
2002
2003 void os::print_memory_info(outputStream* st) {
2004 st->print("Memory:");
2005 st->print(" %dk page", os::vm_page_size()>>10);
2006 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2007 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2008 st->cr();
2009 (void) check_addr0(st);
2010 }
2011
2012 void os::print_siginfo(outputStream* st, void* siginfo) {
2013 const siginfo_t* si = (const siginfo_t*)siginfo;
2014
2015 os::Posix::print_siginfo_brief(st, si);
2016
2017 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2018 UseSharedSpaces) {
2019 FileMapInfo* mapinfo = FileMapInfo::current_info();
2020 if (mapinfo->is_in_shared_space(si->si_addr)) {
2021 st->print("\n\nError accessing class data sharing archive." \
2022 " Mapped file inaccessible during execution, " \
2023 " possible disk/network problem.");
2024 }
2025 }
2026 st->cr();
2027 }
2028
2029 // Moved from whole group, because we need them here for diagnostic
2030 // prints.
2031 #define OLDMAXSIGNUM 32
2032 static int Maxsignum = 0;
2033 static int *ourSigFlags = NULL;
2034
2035 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2036
2037 int os::Solaris::get_our_sigflags(int sig) {
2038 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2039 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2040 return ourSigFlags[sig];
2041 }
2042
2043 void os::Solaris::set_our_sigflags(int sig, int flags) {
2044 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2045 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2046 ourSigFlags[sig] = flags;
2047 }
2048
2049
2050 static const char* get_signal_handler_name(address handler,
2051 char* buf, int buflen) {
2052 int offset;
2053 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2054 if (found) {
2055 // skip directory names
2056 const char *p1, *p2;
2057 p1 = buf;
2058 size_t len = strlen(os::file_separator());
2059 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2060 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2061 } else {
2062 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2063 }
2064 return buf;
2065 }
2066
2067 static void print_signal_handler(outputStream* st, int sig,
2068 char* buf, size_t buflen) {
2069 struct sigaction sa;
2070
2071 sigaction(sig, NULL, &sa);
2072
2073 st->print("%s: ", os::exception_name(sig, buf, buflen));
2074
2075 address handler = (sa.sa_flags & SA_SIGINFO)
2076 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2077 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2078
2079 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2080 st->print("SIG_DFL");
2081 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2082 st->print("SIG_IGN");
2083 } else {
2084 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2085 }
2086
2087 st->print(", sa_mask[0]=");
2088 os::Posix::print_signal_set_short(st, &sa.sa_mask);
2089
2090 address rh = VMError::get_resetted_sighandler(sig);
2091 // May be, handler was resetted by VMError?
2092 if (rh != NULL) {
2093 handler = rh;
2094 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2095 }
2096
2097 st->print(", sa_flags=");
2098 os::Posix::print_sa_flags(st, sa.sa_flags);
2099
2100 // Check: is it our handler?
2101 if (handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2102 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2103 // It is our signal handler
2104 // check for flags
2105 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2106 st->print(
2107 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2108 os::Solaris::get_our_sigflags(sig));
2109 }
2110 }
2111 st->cr();
2112 }
2113
2114 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2115 st->print_cr("Signal Handlers:");
2116 print_signal_handler(st, SIGSEGV, buf, buflen);
2117 print_signal_handler(st, SIGBUS , buf, buflen);
2118 print_signal_handler(st, SIGFPE , buf, buflen);
2119 print_signal_handler(st, SIGPIPE, buf, buflen);
2120 print_signal_handler(st, SIGXFSZ, buf, buflen);
2121 print_signal_handler(st, SIGILL , buf, buflen);
2122 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2123 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2124 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2125 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2126 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2127 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2128 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2129 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2130 }
2131
2132 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2133
2134 // Find the full path to the current module, libjvm.so
2135 void os::jvm_path(char *buf, jint buflen) {
2136 // Error checking.
2137 if (buflen < MAXPATHLEN) {
2138 assert(false, "must use a large-enough buffer");
2139 buf[0] = '\0';
2140 return;
2141 }
2142 // Lazy resolve the path to current module.
2143 if (saved_jvm_path[0] != 0) {
2144 strcpy(buf, saved_jvm_path);
2145 return;
2146 }
2147
2148 Dl_info dlinfo;
2149 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2150 assert(ret != 0, "cannot locate libjvm");
2151 if (ret != 0 && dlinfo.dli_fname != NULL) {
2152 realpath((char *)dlinfo.dli_fname, buf);
2153 } else {
2154 buf[0] = '\0';
2155 return;
2156 }
2157
2158 if (Arguments::sun_java_launcher_is_altjvm()) {
2159 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical
2160 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".
2161 // If "/jre/lib/" appears at the right place in the string, then
2162 // assume we are installed in a JDK and we're done. Otherwise, check
2163 // for a JAVA_HOME environment variable and fix up the path so it
2164 // looks like libjvm.so is installed there (append a fake suffix
2165 // hotspot/libjvm.so).
2166 const char *p = buf + strlen(buf) - 1;
2167 for (int count = 0; p > buf && count < 5; ++count) {
2168 for (--p; p > buf && *p != '/'; --p)
2169 /* empty */ ;
2170 }
2171
2172 if (strncmp(p, "/jre/lib/", 9) != 0) {
2173 // Look for JAVA_HOME in the environment.
2174 char* java_home_var = ::getenv("JAVA_HOME");
2175 if (java_home_var != NULL && java_home_var[0] != 0) {
2176 char cpu_arch[12];
2177 char* jrelib_p;
2178 int len;
2179 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2180 #ifdef _LP64
2181 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2182 if (strcmp(cpu_arch, "sparc") == 0) {
2183 strcat(cpu_arch, "v9");
2184 } else if (strcmp(cpu_arch, "i386") == 0) {
2185 strcpy(cpu_arch, "amd64");
2186 }
2187 #endif
2188 // Check the current module name "libjvm.so".
2189 p = strrchr(buf, '/');
2190 assert(strstr(p, "/libjvm") == p, "invalid library name");
2191
2192 realpath(java_home_var, buf);
2193 // determine if this is a legacy image or modules image
2194 // modules image doesn't have "jre" subdirectory
2195 len = strlen(buf);
2196 assert(len < buflen, "Ran out of buffer space");
2197 jrelib_p = buf + len;
2198 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2199 if (0 != access(buf, F_OK)) {
2200 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2201 }
2202
2203 if (0 == access(buf, F_OK)) {
2204 // Use current module name "libjvm.so"
2205 len = strlen(buf);
2206 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
2207 } else {
2208 // Go back to path of .so
2209 realpath((char *)dlinfo.dli_fname, buf);
2210 }
2211 }
2212 }
2213 }
2214
2215 strncpy(saved_jvm_path, buf, MAXPATHLEN);
2216 saved_jvm_path[MAXPATHLEN - 1] = '\0';
2217 }
2218
2219
2220 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2221 // no prefix required, not even "_"
2222 }
2223
2224
2225 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2226 // no suffix required
2227 }
2228
2229 // This method is a copy of JDK's sysGetLastErrorString
2230 // from src/solaris/hpi/src/system_md.c
2231
2232 size_t os::lasterror(char *buf, size_t len) {
2233 if (errno == 0) return 0;
2234
2235 const char *s = ::strerror(errno);
2236 size_t n = ::strlen(s);
2237 if (n >= len) {
2238 n = len - 1;
2239 }
2240 ::strncpy(buf, s, n);
2241 buf[n] = '\0';
2242 return n;
2243 }
2244
2245
2246 // sun.misc.Signal
2247
2248 extern "C" {
2249 static void UserHandler(int sig, void *siginfo, void *context) {
2250 // Ctrl-C is pressed during error reporting, likely because the error
2251 // handler fails to abort. Let VM die immediately.
2252 if (sig == SIGINT && is_error_reported()) {
2253 os::die();
2254 }
2255
2256 os::signal_notify(sig);
2257 // We do not need to reinstate the signal handler each time...
2258 }
2259 }
2260
2261 void* os::user_handler() {
2262 return CAST_FROM_FN_PTR(void*, UserHandler);
2263 }
2264
2265 class Semaphore : public StackObj {
2266 public:
2267 Semaphore();
2268 ~Semaphore();
2269 void signal();
2270 void wait();
2271 bool trywait();
2272 bool timedwait(unsigned int sec, int nsec);
2273 private:
2274 sema_t _semaphore;
2275 };
2276
2277
2278 Semaphore::Semaphore() {
2279 sema_init(&_semaphore, 0, NULL, NULL);
2280 }
2281
2282 Semaphore::~Semaphore() {
2283 sema_destroy(&_semaphore);
2284 }
2285
2286 void Semaphore::signal() {
2287 sema_post(&_semaphore);
2288 }
2289
2290 void Semaphore::wait() {
2291 sema_wait(&_semaphore);
2292 }
2293
2294 bool Semaphore::trywait() {
2295 return sema_trywait(&_semaphore) == 0;
2296 }
2297
2298 bool Semaphore::timedwait(unsigned int sec, int nsec) {
2299 struct timespec ts;
2300 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec);
2301
2302 while (1) {
2303 int result = sema_timedwait(&_semaphore, &ts);
2304 if (result == 0) {
2305 return true;
2306 } else if (errno == EINTR) {
2307 continue;
2308 } else if (errno == ETIME) {
2309 return false;
2310 } else {
2311 return false;
2312 }
2313 }
2314 }
2315
2316 extern "C" {
2317 typedef void (*sa_handler_t)(int);
2318 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2319 }
2320
2321 void* os::signal(int signal_number, void* handler) {
2322 struct sigaction sigAct, oldSigAct;
2323 sigfillset(&(sigAct.sa_mask));
2324 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2325 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2326
2327 if (sigaction(signal_number, &sigAct, &oldSigAct)) {
2328 // -1 means registration failed
2329 return (void *)-1;
2330 }
2331
2332 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2333 }
2334
2335 void os::signal_raise(int signal_number) {
2336 raise(signal_number);
2337 }
2338
2339 // The following code is moved from os.cpp for making this
2340 // code platform specific, which it is by its very nature.
2341
2342 // a counter for each possible signal value
2343 static int Sigexit = 0;
2344 static int Maxlibjsigsigs;
2345 static jint *pending_signals = NULL;
2346 static int *preinstalled_sigs = NULL;
2347 static struct sigaction *chainedsigactions = NULL;
2348 static sema_t sig_sem;
2349 typedef int (*version_getting_t)();
2350 version_getting_t os::Solaris::get_libjsig_version = NULL;
2351 static int libjsigversion = NULL;
2352
2353 int os::sigexitnum_pd() {
2354 assert(Sigexit > 0, "signal memory not yet initialized");
2355 return Sigexit;
2356 }
2357
2358 void os::Solaris::init_signal_mem() {
2359 // Initialize signal structures
2360 Maxsignum = SIGRTMAX;
2361 Sigexit = Maxsignum+1;
2362 assert(Maxsignum >0, "Unable to obtain max signal number");
2363
2364 Maxlibjsigsigs = Maxsignum;
2365
2366 // pending_signals has one int per signal
2367 // The additional signal is for SIGEXIT - exit signal to signal_thread
2368 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2369 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2370
2371 if (UseSignalChaining) {
2372 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2373 * (Maxsignum + 1), mtInternal);
2374 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2375 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2376 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2377 }
2378 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2379 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2380 }
2381
2382 void os::signal_init_pd() {
2383 int ret;
2384
2385 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2386 assert(ret == 0, "sema_init() failed");
2387 }
2388
2389 void os::signal_notify(int signal_number) {
2390 int ret;
2391
2392 Atomic::inc(&pending_signals[signal_number]);
2393 ret = ::sema_post(&sig_sem);
2394 assert(ret == 0, "sema_post() failed");
2395 }
2396
2397 static int check_pending_signals(bool wait_for_signal) {
2398 int ret;
2399 while (true) {
2400 for (int i = 0; i < Sigexit + 1; i++) {
2401 jint n = pending_signals[i];
2402 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2403 return i;
2404 }
2405 }
2406 if (!wait_for_signal) {
2407 return -1;
2408 }
2409 JavaThread *thread = JavaThread::current();
2410 ThreadBlockInVM tbivm(thread);
2411
2412 bool threadIsSuspended;
2413 do {
2414 thread->set_suspend_equivalent();
2415 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2416 while ((ret = ::sema_wait(&sig_sem)) == EINTR)
2417 ;
2418 assert(ret == 0, "sema_wait() failed");
2419
2420 // were we externally suspended while we were waiting?
2421 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2422 if (threadIsSuspended) {
2423 // The semaphore has been incremented, but while we were waiting
2424 // another thread suspended us. We don't want to continue running
2425 // while suspended because that would surprise the thread that
2426 // suspended us.
2427 ret = ::sema_post(&sig_sem);
2428 assert(ret == 0, "sema_post() failed");
2429
2430 thread->java_suspend_self();
2431 }
2432 } while (threadIsSuspended);
2433 }
2434 }
2435
2436 int os::signal_lookup() {
2437 return check_pending_signals(false);
2438 }
2439
2440 int os::signal_wait() {
2441 return check_pending_signals(true);
2442 }
2443
2444 ////////////////////////////////////////////////////////////////////////////////
2445 // Virtual Memory
2446
2447 static int page_size = -1;
2448
2449 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2450 // clear this var if support is not available.
2451 static bool has_map_align = true;
2452
2453 int os::vm_page_size() {
2454 assert(page_size != -1, "must call os::init");
2455 return page_size;
2456 }
2457
2458 // Solaris allocates memory by pages.
2459 int os::vm_allocation_granularity() {
2460 assert(page_size != -1, "must call os::init");
2461 return page_size;
2462 }
2463
2464 static bool recoverable_mmap_error(int err) {
2465 // See if the error is one we can let the caller handle. This
2466 // list of errno values comes from the Solaris mmap(2) man page.
2467 switch (err) {
2468 case EBADF:
2469 case EINVAL:
2470 case ENOTSUP:
2471 // let the caller deal with these errors
2472 return true;
2473
2474 default:
2475 // Any remaining errors on this OS can cause our reserved mapping
2476 // to be lost. That can cause confusion where different data
2477 // structures think they have the same memory mapped. The worst
2478 // scenario is if both the VM and a library think they have the
2479 // same memory mapped.
2480 return false;
2481 }
2482 }
2483
2484 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec,
2485 int err) {
2486 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2487 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec,
2488 strerror(err), err);
2489 }
2490
2491 static void warn_fail_commit_memory(char* addr, size_t bytes,
2492 size_t alignment_hint, bool exec,
2493 int err) {
2494 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2495 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes,
2496 alignment_hint, exec, strerror(err), err);
2497 }
2498
2499 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) {
2500 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2501 size_t size = bytes;
2502 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2503 if (res != NULL) {
2504 if (UseNUMAInterleaving) {
2505 numa_make_global(addr, bytes);
2506 }
2507 return 0;
2508 }
2509
2510 int err = errno; // save errno from mmap() call in mmap_chunk()
2511
2512 if (!recoverable_mmap_error(err)) {
2513 warn_fail_commit_memory(addr, bytes, exec, err);
2514 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory.");
2515 }
2516
2517 return err;
2518 }
2519
2520 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2521 return Solaris::commit_memory_impl(addr, bytes, exec) == 0;
2522 }
2523
2524 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec,
2525 const char* mesg) {
2526 assert(mesg != NULL, "mesg must be specified");
2527 int err = os::Solaris::commit_memory_impl(addr, bytes, exec);
2528 if (err != 0) {
2529 // the caller wants all commit errors to exit with the specified mesg:
2530 warn_fail_commit_memory(addr, bytes, exec, err);
2531 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2532 }
2533 }
2534
2535 size_t os::Solaris::page_size_for_alignment(size_t alignment) {
2536 assert(is_size_aligned(alignment, (size_t) vm_page_size()),
2537 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT,
2538 alignment, (size_t) vm_page_size()));
2539
2540 for (int i = 0; _page_sizes[i] != 0; i++) {
2541 if (is_size_aligned(alignment, _page_sizes[i])) {
2542 return _page_sizes[i];
2543 }
2544 }
2545
2546 return (size_t) vm_page_size();
2547 }
2548
2549 int os::Solaris::commit_memory_impl(char* addr, size_t bytes,
2550 size_t alignment_hint, bool exec) {
2551 int err = Solaris::commit_memory_impl(addr, bytes, exec);
2552 if (err == 0 && UseLargePages && alignment_hint > 0) {
2553 assert(is_size_aligned(bytes, alignment_hint),
2554 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint));
2555
2556 // The syscall memcntl requires an exact page size (see man memcntl for details).
2557 size_t page_size = page_size_for_alignment(alignment_hint);
2558 if (page_size > (size_t) vm_page_size()) {
2559 (void)Solaris::setup_large_pages(addr, bytes, page_size);
2560 }
2561 }
2562 return err;
2563 }
2564
2565 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2566 bool exec) {
2567 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0;
2568 }
2569
2570 void os::pd_commit_memory_or_exit(char* addr, size_t bytes,
2571 size_t alignment_hint, bool exec,
2572 const char* mesg) {
2573 assert(mesg != NULL, "mesg must be specified");
2574 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec);
2575 if (err != 0) {
2576 // the caller wants all commit errors to exit with the specified mesg:
2577 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err);
2578 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2579 }
2580 }
2581
2582 // Uncommit the pages in a specified region.
2583 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2584 if (madvise(addr, bytes, MADV_FREE) < 0) {
2585 debug_only(warning("MADV_FREE failed."));
2586 return;
2587 }
2588 }
2589
2590 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2591 return os::commit_memory(addr, size, !ExecMem);
2592 }
2593
2594 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2595 return os::uncommit_memory(addr, size);
2596 }
2597
2598 // Change the page size in a given range.
2599 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2600 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2601 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2602 if (UseLargePages) {
2603 size_t page_size = Solaris::page_size_for_alignment(alignment_hint);
2604 if (page_size > (size_t) vm_page_size()) {
2605 Solaris::setup_large_pages(addr, bytes, page_size);
2606 }
2607 }
2608 }
2609
2610 // Tell the OS to make the range local to the first-touching LWP
2611 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2612 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2613 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2614 debug_only(warning("MADV_ACCESS_LWP failed."));
2615 }
2616 }
2617
2618 // Tell the OS that this range would be accessed from different LWPs.
2619 void os::numa_make_global(char *addr, size_t bytes) {
2620 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2621 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2622 debug_only(warning("MADV_ACCESS_MANY failed."));
2623 }
2624 }
2625
2626 // Get the number of the locality groups.
2627 size_t os::numa_get_groups_num() {
2628 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2629 return n != -1 ? n : 1;
2630 }
2631
2632 // Get a list of leaf locality groups. A leaf lgroup is group that
2633 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2634 // board. An LWP is assigned to one of these groups upon creation.
2635 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2636 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2637 ids[0] = 0;
2638 return 1;
2639 }
2640 int result_size = 0, top = 1, bottom = 0, cur = 0;
2641 for (int k = 0; k < size; k++) {
2642 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2643 (Solaris::lgrp_id_t*)&ids[top], size - top);
2644 if (r == -1) {
2645 ids[0] = 0;
2646 return 1;
2647 }
2648 if (!r) {
2649 // That's a leaf node.
2650 assert(bottom <= cur, "Sanity check");
2651 // Check if the node has memory
2652 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2653 NULL, 0, LGRP_RSRC_MEM) > 0) {
2654 ids[bottom++] = ids[cur];
2655 }
2656 }
2657 top += r;
2658 cur++;
2659 }
2660 if (bottom == 0) {
2661 // Handle a situation, when the OS reports no memory available.
2662 // Assume UMA architecture.
2663 ids[0] = 0;
2664 return 1;
2665 }
2666 return bottom;
2667 }
2668
2669 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2670 bool os::numa_topology_changed() {
2671 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2672 if (is_stale != -1 && is_stale) {
2673 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2674 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2675 assert(c != 0, "Failure to initialize LGRP API");
2676 Solaris::set_lgrp_cookie(c);
2677 return true;
2678 }
2679 return false;
2680 }
2681
2682 // Get the group id of the current LWP.
2683 int os::numa_get_group_id() {
2684 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2685 if (lgrp_id == -1) {
2686 return 0;
2687 }
2688 const int size = os::numa_get_groups_num();
2689 int *ids = (int*)alloca(size * sizeof(int));
2690
2691 // Get the ids of all lgroups with memory; r is the count.
2692 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2693 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2694 if (r <= 0) {
2695 return 0;
2696 }
2697 return ids[os::random() % r];
2698 }
2699
2700 // Request information about the page.
2701 bool os::get_page_info(char *start, page_info* info) {
2702 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2703 uint64_t addr = (uintptr_t)start;
2704 uint64_t outdata[2];
2705 uint_t validity = 0;
2706
2707 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2708 return false;
2709 }
2710
2711 info->size = 0;
2712 info->lgrp_id = -1;
2713
2714 if ((validity & 1) != 0) {
2715 if ((validity & 2) != 0) {
2716 info->lgrp_id = outdata[0];
2717 }
2718 if ((validity & 4) != 0) {
2719 info->size = outdata[1];
2720 }
2721 return true;
2722 }
2723 return false;
2724 }
2725
2726 // Scan the pages from start to end until a page different than
2727 // the one described in the info parameter is encountered.
2728 char *os::scan_pages(char *start, char* end, page_info* page_expected,
2729 page_info* page_found) {
2730 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2731 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2732 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1];
2733 uint_t validity[MAX_MEMINFO_CNT];
2734
2735 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2736 uint64_t p = (uint64_t)start;
2737 while (p < (uint64_t)end) {
2738 addrs[0] = p;
2739 size_t addrs_count = 1;
2740 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2741 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2742 addrs_count++;
2743 }
2744
2745 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2746 return NULL;
2747 }
2748
2749 size_t i = 0;
2750 for (; i < addrs_count; i++) {
2751 if ((validity[i] & 1) != 0) {
2752 if ((validity[i] & 4) != 0) {
2753 if (outdata[types * i + 1] != page_expected->size) {
2754 break;
2755 }
2756 } else if (page_expected->size != 0) {
2757 break;
2758 }
2759
2760 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2761 if (outdata[types * i] != page_expected->lgrp_id) {
2762 break;
2763 }
2764 }
2765 } else {
2766 return NULL;
2767 }
2768 }
2769
2770 if (i < addrs_count) {
2771 if ((validity[i] & 2) != 0) {
2772 page_found->lgrp_id = outdata[types * i];
2773 } else {
2774 page_found->lgrp_id = -1;
2775 }
2776 if ((validity[i] & 4) != 0) {
2777 page_found->size = outdata[types * i + 1];
2778 } else {
2779 page_found->size = 0;
2780 }
2781 return (char*)addrs[i];
2782 }
2783
2784 p = addrs[addrs_count - 1] + page_size;
2785 }
2786 return end;
2787 }
2788
2789 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2790 size_t size = bytes;
2791 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2792 // uncommitted page. Otherwise, the read/write might succeed if we
2793 // have enough swap space to back the physical page.
2794 return
2795 NULL != Solaris::mmap_chunk(addr, size,
2796 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2797 PROT_NONE);
2798 }
2799
2800 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2801 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2802
2803 if (b == MAP_FAILED) {
2804 return NULL;
2805 }
2806 return b;
2807 }
2808
2809 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes,
2810 size_t alignment_hint, bool fixed) {
2811 char* addr = requested_addr;
2812 int flags = MAP_PRIVATE | MAP_NORESERVE;
2813
2814 assert(!(fixed && (alignment_hint > 0)),
2815 "alignment hint meaningless with fixed mmap");
2816
2817 if (fixed) {
2818 flags |= MAP_FIXED;
2819 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
2820 flags |= MAP_ALIGN;
2821 addr = (char*) alignment_hint;
2822 }
2823
2824 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2825 // uncommitted page. Otherwise, the read/write might succeed if we
2826 // have enough swap space to back the physical page.
2827 return mmap_chunk(addr, bytes, flags, PROT_NONE);
2828 }
2829
2830 char* os::pd_reserve_memory(size_t bytes, char* requested_addr,
2831 size_t alignment_hint) {
2832 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint,
2833 (requested_addr != NULL));
2834
2835 guarantee(requested_addr == NULL || requested_addr == addr,
2836 "OS failed to return requested mmap address.");
2837 return addr;
2838 }
2839
2840 // Reserve memory at an arbitrary address, only if that area is
2841 // available (and not reserved for something else).
2842
2843 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2844 const int max_tries = 10;
2845 char* base[max_tries];
2846 size_t size[max_tries];
2847
2848 // Solaris adds a gap between mmap'ed regions. The size of the gap
2849 // is dependent on the requested size and the MMU. Our initial gap
2850 // value here is just a guess and will be corrected later.
2851 bool had_top_overlap = false;
2852 bool have_adjusted_gap = false;
2853 size_t gap = 0x400000;
2854
2855 // Assert only that the size is a multiple of the page size, since
2856 // that's all that mmap requires, and since that's all we really know
2857 // about at this low abstraction level. If we need higher alignment,
2858 // we can either pass an alignment to this method or verify alignment
2859 // in one of the methods further up the call chain. See bug 5044738.
2860 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
2861
2862 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
2863 // Give it a try, if the kernel honors the hint we can return immediately.
2864 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
2865
2866 volatile int err = errno;
2867 if (addr == requested_addr) {
2868 return addr;
2869 } else if (addr != NULL) {
2870 pd_unmap_memory(addr, bytes);
2871 }
2872
2873 if (PrintMiscellaneous && Verbose) {
2874 char buf[256];
2875 buf[0] = '\0';
2876 if (addr == NULL) {
2877 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
2878 }
2879 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
2880 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
2881 "%s", bytes, requested_addr, addr, buf);
2882 }
2883
2884 // Address hint method didn't work. Fall back to the old method.
2885 // In theory, once SNV becomes our oldest supported platform, this
2886 // code will no longer be needed.
2887 //
2888 // Repeatedly allocate blocks until the block is allocated at the
2889 // right spot. Give up after max_tries.
2890 int i;
2891 for (i = 0; i < max_tries; ++i) {
2892 base[i] = reserve_memory(bytes);
2893
2894 if (base[i] != NULL) {
2895 // Is this the block we wanted?
2896 if (base[i] == requested_addr) {
2897 size[i] = bytes;
2898 break;
2899 }
2900
2901 // check that the gap value is right
2902 if (had_top_overlap && !have_adjusted_gap) {
2903 size_t actual_gap = base[i-1] - base[i] - bytes;
2904 if (gap != actual_gap) {
2905 // adjust the gap value and retry the last 2 allocations
2906 assert(i > 0, "gap adjustment code problem");
2907 have_adjusted_gap = true; // adjust the gap only once, just in case
2908 gap = actual_gap;
2909 if (PrintMiscellaneous && Verbose) {
2910 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
2911 }
2912 unmap_memory(base[i], bytes);
2913 unmap_memory(base[i-1], size[i-1]);
2914 i-=2;
2915 continue;
2916 }
2917 }
2918
2919 // Does this overlap the block we wanted? Give back the overlapped
2920 // parts and try again.
2921 //
2922 // There is still a bug in this code: if top_overlap == bytes,
2923 // the overlap is offset from requested region by the value of gap.
2924 // In this case giving back the overlapped part will not work,
2925 // because we'll give back the entire block at base[i] and
2926 // therefore the subsequent allocation will not generate a new gap.
2927 // This could be fixed with a new algorithm that used larger
2928 // or variable size chunks to find the requested region -
2929 // but such a change would introduce additional complications.
2930 // It's rare enough that the planets align for this bug,
2931 // so we'll just wait for a fix for 6204603/5003415 which
2932 // will provide a mmap flag to allow us to avoid this business.
2933
2934 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
2935 if (top_overlap >= 0 && top_overlap < bytes) {
2936 had_top_overlap = true;
2937 unmap_memory(base[i], top_overlap);
2938 base[i] += top_overlap;
2939 size[i] = bytes - top_overlap;
2940 } else {
2941 size_t bottom_overlap = base[i] + bytes - requested_addr;
2942 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
2943 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
2944 warning("attempt_reserve_memory_at: possible alignment bug");
2945 }
2946 unmap_memory(requested_addr, bottom_overlap);
2947 size[i] = bytes - bottom_overlap;
2948 } else {
2949 size[i] = bytes;
2950 }
2951 }
2952 }
2953 }
2954
2955 // Give back the unused reserved pieces.
2956
2957 for (int j = 0; j < i; ++j) {
2958 if (base[j] != NULL) {
2959 unmap_memory(base[j], size[j]);
2960 }
2961 }
2962
2963 return (i < max_tries) ? requested_addr : NULL;
2964 }
2965
2966 bool os::pd_release_memory(char* addr, size_t bytes) {
2967 size_t size = bytes;
2968 return munmap(addr, size) == 0;
2969 }
2970
2971 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
2972 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
2973 "addr must be page aligned");
2974 int retVal = mprotect(addr, bytes, prot);
2975 return retVal == 0;
2976 }
2977
2978 // Protect memory (Used to pass readonly pages through
2979 // JNI GetArray<type>Elements with empty arrays.)
2980 // Also, used for serialization page and for compressed oops null pointer
2981 // checking.
2982 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
2983 bool is_committed) {
2984 unsigned int p = 0;
2985 switch (prot) {
2986 case MEM_PROT_NONE: p = PROT_NONE; break;
2987 case MEM_PROT_READ: p = PROT_READ; break;
2988 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
2989 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
2990 default:
2991 ShouldNotReachHere();
2992 }
2993 // is_committed is unused.
2994 return solaris_mprotect(addr, bytes, p);
2995 }
2996
2997 // guard_memory and unguard_memory only happens within stack guard pages.
2998 // Since ISM pertains only to the heap, guard and unguard memory should not
2999 /// happen with an ISM region.
3000 bool os::guard_memory(char* addr, size_t bytes) {
3001 return solaris_mprotect(addr, bytes, PROT_NONE);
3002 }
3003
3004 bool os::unguard_memory(char* addr, size_t bytes) {
3005 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3006 }
3007
3008 // Large page support
3009 static size_t _large_page_size = 0;
3010
3011 // Insertion sort for small arrays (descending order).
3012 static void insertion_sort_descending(size_t* array, int len) {
3013 for (int i = 0; i < len; i++) {
3014 size_t val = array[i];
3015 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3016 size_t tmp = array[key];
3017 array[key] = array[key - 1];
3018 array[key - 1] = tmp;
3019 }
3020 }
3021 }
3022
3023 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) {
3024 const unsigned int usable_count = VM_Version::page_size_count();
3025 if (usable_count == 1) {
3026 return false;
3027 }
3028
3029 // Find the right getpagesizes interface. When solaris 11 is the minimum
3030 // build platform, getpagesizes() (without the '2') can be called directly.
3031 typedef int (*gps_t)(size_t[], int);
3032 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3033 if (gps_func == NULL) {
3034 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3035 if (gps_func == NULL) {
3036 if (warn) {
3037 warning("MPSS is not supported by the operating system.");
3038 }
3039 return false;
3040 }
3041 }
3042
3043 // Fill the array of page sizes.
3044 int n = (*gps_func)(_page_sizes, page_sizes_max);
3045 assert(n > 0, "Solaris bug?");
3046
3047 if (n == page_sizes_max) {
3048 // Add a sentinel value (necessary only if the array was completely filled
3049 // since it is static (zeroed at initialization)).
3050 _page_sizes[--n] = 0;
3051 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3052 }
3053 assert(_page_sizes[n] == 0, "missing sentinel");
3054 trace_page_sizes("available page sizes", _page_sizes, n);
3055
3056 if (n == 1) return false; // Only one page size available.
3057
3058 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3059 // select up to usable_count elements. First sort the array, find the first
3060 // acceptable value, then copy the usable sizes to the top of the array and
3061 // trim the rest. Make sure to include the default page size :-).
3062 //
3063 // A better policy could get rid of the 4M limit by taking the sizes of the
3064 // important VM memory regions (java heap and possibly the code cache) into
3065 // account.
3066 insertion_sort_descending(_page_sizes, n);
3067 const size_t size_limit =
3068 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3069 int beg;
3070 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */;
3071 const int end = MIN2((int)usable_count, n) - 1;
3072 for (int cur = 0; cur < end; ++cur, ++beg) {
3073 _page_sizes[cur] = _page_sizes[beg];
3074 }
3075 _page_sizes[end] = vm_page_size();
3076 _page_sizes[end + 1] = 0;
3077
3078 if (_page_sizes[end] > _page_sizes[end - 1]) {
3079 // Default page size is not the smallest; sort again.
3080 insertion_sort_descending(_page_sizes, end + 1);
3081 }
3082 *page_size = _page_sizes[0];
3083
3084 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3085 return true;
3086 }
3087
3088 void os::large_page_init() {
3089 if (UseLargePages) {
3090 // print a warning if any large page related flag is specified on command line
3091 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3092 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3093
3094 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3095 }
3096 }
3097
3098 bool os::Solaris::is_valid_page_size(size_t bytes) {
3099 for (int i = 0; _page_sizes[i] != 0; i++) {
3100 if (_page_sizes[i] == bytes) {
3101 return true;
3102 }
3103 }
3104 return false;
3105 }
3106
3107 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) {
3108 assert(is_valid_page_size(align), err_msg(SIZE_FORMAT " is not a valid page size", align));
3109 assert(is_ptr_aligned((void*) start, align),
3110 err_msg(PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align));
3111 assert(is_size_aligned(bytes, align),
3112 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align));
3113
3114 // Signal to OS that we want large pages for addresses
3115 // from addr, addr + bytes
3116 struct memcntl_mha mpss_struct;
3117 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3118 mpss_struct.mha_pagesize = align;
3119 mpss_struct.mha_flags = 0;
3120 // Upon successful completion, memcntl() returns 0
3121 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) {
3122 debug_only(warning("Attempt to use MPSS failed."));
3123 return false;
3124 }
3125 return true;
3126 }
3127
3128 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) {
3129 fatal("os::reserve_memory_special should not be called on Solaris.");
3130 return NULL;
3131 }
3132
3133 bool os::release_memory_special(char* base, size_t bytes) {
3134 fatal("os::release_memory_special should not be called on Solaris.");
3135 return false;
3136 }
3137
3138 size_t os::large_page_size() {
3139 return _large_page_size;
3140 }
3141
3142 // MPSS allows application to commit large page memory on demand; with ISM
3143 // the entire memory region must be allocated as shared memory.
3144 bool os::can_commit_large_page_memory() {
3145 return true;
3146 }
3147
3148 bool os::can_execute_large_page_memory() {
3149 return true;
3150 }
3151
3152 // Read calls from inside the vm need to perform state transitions
3153 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3154 size_t res;
3155 JavaThread* thread = (JavaThread*)Thread::current();
3156 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3157 ThreadBlockInVM tbiv(thread);
3158 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3159 return res;
3160 }
3161
3162 size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) {
3163 size_t res;
3164 JavaThread* thread = (JavaThread*)Thread::current();
3165 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3166 ThreadBlockInVM tbiv(thread);
3167 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res);
3168 return res;
3169 }
3170
3171 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3172 size_t res;
3173 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
3174 "Assumed _thread_in_native");
3175 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3176 return res;
3177 }
3178
3179 void os::naked_short_sleep(jlong ms) {
3180 assert(ms < 1000, "Un-interruptable sleep, short time use only");
3181
3182 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but
3183 // Solaris requires -lrt for this.
3184 usleep((ms * 1000));
3185
3186 return;
3187 }
3188
3189 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3190 void os::infinite_sleep() {
3191 while (true) { // sleep forever ...
3192 ::sleep(100); // ... 100 seconds at a time
3193 }
3194 }
3195
3196 // Used to convert frequent JVM_Yield() to nops
3197 bool os::dont_yield() {
3198 if (DontYieldALot) {
3199 static hrtime_t last_time = 0;
3200 hrtime_t diff = getTimeNanos() - last_time;
3201
3202 if (diff < DontYieldALotInterval * 1000000) {
3203 return true;
3204 }
3205
3206 last_time += diff;
3207
3208 return false;
3209 } else {
3210 return false;
3211 }
3212 }
3213
3214 // Note that yield semantics are defined by the scheduling class to which
3215 // the thread currently belongs. Typically, yield will _not yield to
3216 // other equal or higher priority threads that reside on the dispatch queues
3217 // of other CPUs.
3218
3219 void os::naked_yield() {
3220 thr_yield();
3221 }
3222
3223 // Interface for setting lwp priorities. If we are using T2 libthread,
3224 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3225 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3226 // function is meaningless in this mode so we must adjust the real lwp's priority
3227 // The routines below implement the getting and setting of lwp priorities.
3228 //
3229 // Note: T2 is now the only supported libthread. UseBoundThreads flag is
3230 // being deprecated and all threads are now BoundThreads
3231 //
3232 // Note: There are three priority scales used on Solaris. Java priotities
3233 // which range from 1 to 10, libthread "thr_setprio" scale which range
3234 // from 0 to 127, and the current scheduling class of the process we
3235 // are running in. This is typically from -60 to +60.
3236 // The setting of the lwp priorities in done after a call to thr_setprio
3237 // so Java priorities are mapped to libthread priorities and we map from
3238 // the latter to lwp priorities. We don't keep priorities stored in
3239 // Java priorities since some of our worker threads want to set priorities
3240 // higher than all Java threads.
3241 //
3242 // For related information:
3243 // (1) man -s 2 priocntl
3244 // (2) man -s 4 priocntl
3245 // (3) man dispadmin
3246 // = librt.so
3247 // = libthread/common/rtsched.c - thrp_setlwpprio().
3248 // = ps -cL <pid> ... to validate priority.
3249 // = sched_get_priority_min and _max
3250 // pthread_create
3251 // sched_setparam
3252 // pthread_setschedparam
3253 //
3254 // Assumptions:
3255 // + We assume that all threads in the process belong to the same
3256 // scheduling class. IE. an homogenous process.
3257 // + Must be root or in IA group to change change "interactive" attribute.
3258 // Priocntl() will fail silently. The only indication of failure is when
3259 // we read-back the value and notice that it hasn't changed.
3260 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3261 // + For RT, change timeslice as well. Invariant:
3262 // constant "priority integral"
3263 // Konst == TimeSlice * (60-Priority)
3264 // Given a priority, compute appropriate timeslice.
3265 // + Higher numerical values have higher priority.
3266
3267 // sched class attributes
3268 typedef struct {
3269 int schedPolicy; // classID
3270 int maxPrio;
3271 int minPrio;
3272 } SchedInfo;
3273
3274
3275 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3276
3277 #ifdef ASSERT
3278 static int ReadBackValidate = 1;
3279 #endif
3280 static int myClass = 0;
3281 static int myMin = 0;
3282 static int myMax = 0;
3283 static int myCur = 0;
3284 static bool priocntl_enable = false;
3285
3286 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3287 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3288
3289
3290 // lwp_priocntl_init
3291 //
3292 // Try to determine the priority scale for our process.
3293 //
3294 // Return errno or 0 if OK.
3295 //
3296 static int lwp_priocntl_init() {
3297 int rslt;
3298 pcinfo_t ClassInfo;
3299 pcparms_t ParmInfo;
3300 int i;
3301
3302 if (!UseThreadPriorities) return 0;
3303
3304 // If ThreadPriorityPolicy is 1, switch tables
3305 if (ThreadPriorityPolicy == 1) {
3306 for (i = 0; i < CriticalPriority+1; i++)
3307 os::java_to_os_priority[i] = prio_policy1[i];
3308 }
3309 if (UseCriticalJavaThreadPriority) {
3310 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3311 // See set_native_priority() and set_lwp_class_and_priority().
3312 // Save original MaxPriority mapping in case attempt to
3313 // use critical priority fails.
3314 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3315 // Set negative to distinguish from other priorities
3316 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3317 }
3318
3319 // Get IDs for a set of well-known scheduling classes.
3320 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3321 // the system. We should have a loop that iterates over the
3322 // classID values, which are known to be "small" integers.
3323
3324 strcpy(ClassInfo.pc_clname, "TS");
3325 ClassInfo.pc_cid = -1;
3326 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3327 if (rslt < 0) return errno;
3328 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3329 tsLimits.schedPolicy = ClassInfo.pc_cid;
3330 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3331 tsLimits.minPrio = -tsLimits.maxPrio;
3332
3333 strcpy(ClassInfo.pc_clname, "IA");
3334 ClassInfo.pc_cid = -1;
3335 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3336 if (rslt < 0) return errno;
3337 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3338 iaLimits.schedPolicy = ClassInfo.pc_cid;
3339 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3340 iaLimits.minPrio = -iaLimits.maxPrio;
3341
3342 strcpy(ClassInfo.pc_clname, "RT");
3343 ClassInfo.pc_cid = -1;
3344 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3345 if (rslt < 0) return errno;
3346 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3347 rtLimits.schedPolicy = ClassInfo.pc_cid;
3348 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3349 rtLimits.minPrio = 0;
3350
3351 strcpy(ClassInfo.pc_clname, "FX");
3352 ClassInfo.pc_cid = -1;
3353 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3354 if (rslt < 0) return errno;
3355 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3356 fxLimits.schedPolicy = ClassInfo.pc_cid;
3357 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3358 fxLimits.minPrio = 0;
3359
3360 // Query our "current" scheduling class.
3361 // This will normally be IA, TS or, rarely, FX or RT.
3362 memset(&ParmInfo, 0, sizeof(ParmInfo));
3363 ParmInfo.pc_cid = PC_CLNULL;
3364 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3365 if (rslt < 0) return errno;
3366 myClass = ParmInfo.pc_cid;
3367
3368 // We now know our scheduling classId, get specific information
3369 // about the class.
3370 ClassInfo.pc_cid = myClass;
3371 ClassInfo.pc_clname[0] = 0;
3372 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3373 if (rslt < 0) return errno;
3374
3375 if (ThreadPriorityVerbose) {
3376 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3377 }
3378
3379 memset(&ParmInfo, 0, sizeof(pcparms_t));
3380 ParmInfo.pc_cid = PC_CLNULL;
3381 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3382 if (rslt < 0) return errno;
3383
3384 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3385 myMin = rtLimits.minPrio;
3386 myMax = rtLimits.maxPrio;
3387 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3388 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3389 myMin = iaLimits.minPrio;
3390 myMax = iaLimits.maxPrio;
3391 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3392 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3393 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3394 myMin = tsLimits.minPrio;
3395 myMax = tsLimits.maxPrio;
3396 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3397 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3398 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3399 myMin = fxLimits.minPrio;
3400 myMax = fxLimits.maxPrio;
3401 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3402 } else {
3403 // No clue - punt
3404 if (ThreadPriorityVerbose) {
3405 tty->print_cr("Unknown scheduling class: %s ... \n",
3406 ClassInfo.pc_clname);
3407 }
3408 return EINVAL; // no clue, punt
3409 }
3410
3411 if (ThreadPriorityVerbose) {
3412 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax);
3413 }
3414
3415 priocntl_enable = true; // Enable changing priorities
3416 return 0;
3417 }
3418
3419 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3420 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3421 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3422 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3423
3424
3425 // scale_to_lwp_priority
3426 //
3427 // Convert from the libthread "thr_setprio" scale to our current
3428 // lwp scheduling class scale.
3429 //
3430 static int scale_to_lwp_priority(int rMin, int rMax, int x) {
3431 int v;
3432
3433 if (x == 127) return rMax; // avoid round-down
3434 v = (((x*(rMax-rMin)))/128)+rMin;
3435 return v;
3436 }
3437
3438
3439 // set_lwp_class_and_priority
3440 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3441 int newPrio, int new_class, bool scale) {
3442 int rslt;
3443 int Actual, Expected, prv;
3444 pcparms_t ParmInfo; // for GET-SET
3445 #ifdef ASSERT
3446 pcparms_t ReadBack; // for readback
3447 #endif
3448
3449 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3450 // Query current values.
3451 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3452 // Cache "pcparms_t" in global ParmCache.
3453 // TODO: elide set-to-same-value
3454
3455 // If something went wrong on init, don't change priorities.
3456 if (!priocntl_enable) {
3457 if (ThreadPriorityVerbose) {
3458 tty->print_cr("Trying to set priority but init failed, ignoring");
3459 }
3460 return EINVAL;
3461 }
3462
3463 // If lwp hasn't started yet, just return
3464 // the _start routine will call us again.
3465 if (lwpid <= 0) {
3466 if (ThreadPriorityVerbose) {
3467 tty->print_cr("deferring the set_lwp_class_and_priority of thread "
3468 INTPTR_FORMAT " to %d, lwpid not set",
3469 ThreadID, newPrio);
3470 }
3471 return 0;
3472 }
3473
3474 if (ThreadPriorityVerbose) {
3475 tty->print_cr ("set_lwp_class_and_priority("
3476 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3477 ThreadID, lwpid, newPrio);
3478 }
3479
3480 memset(&ParmInfo, 0, sizeof(pcparms_t));
3481 ParmInfo.pc_cid = PC_CLNULL;
3482 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3483 if (rslt < 0) return errno;
3484
3485 int cur_class = ParmInfo.pc_cid;
3486 ParmInfo.pc_cid = (id_t)new_class;
3487
3488 if (new_class == rtLimits.schedPolicy) {
3489 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3490 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3491 rtLimits.maxPrio, newPrio)
3492 : newPrio;
3493 rtInfo->rt_tqsecs = RT_NOCHANGE;
3494 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3495 if (ThreadPriorityVerbose) {
3496 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3497 }
3498 } else if (new_class == iaLimits.schedPolicy) {
3499 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3500 int maxClamped = MIN2(iaLimits.maxPrio,
3501 cur_class == new_class
3502 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3503 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3504 maxClamped, newPrio)
3505 : newPrio;
3506 iaInfo->ia_uprilim = cur_class == new_class
3507 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3508 iaInfo->ia_mode = IA_NOCHANGE;
3509 if (ThreadPriorityVerbose) {
3510 tty->print_cr("IA: [%d...%d] %d->%d\n",
3511 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3512 }
3513 } else if (new_class == tsLimits.schedPolicy) {
3514 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3515 int maxClamped = MIN2(tsLimits.maxPrio,
3516 cur_class == new_class
3517 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3518 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3519 maxClamped, newPrio)
3520 : newPrio;
3521 tsInfo->ts_uprilim = cur_class == new_class
3522 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3523 if (ThreadPriorityVerbose) {
3524 tty->print_cr("TS: [%d...%d] %d->%d\n",
3525 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3526 }
3527 } else if (new_class == fxLimits.schedPolicy) {
3528 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3529 int maxClamped = MIN2(fxLimits.maxPrio,
3530 cur_class == new_class
3531 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3532 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3533 maxClamped, newPrio)
3534 : newPrio;
3535 fxInfo->fx_uprilim = cur_class == new_class
3536 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
3537 fxInfo->fx_tqsecs = FX_NOCHANGE;
3538 fxInfo->fx_tqnsecs = FX_NOCHANGE;
3539 if (ThreadPriorityVerbose) {
3540 tty->print_cr("FX: [%d...%d] %d->%d\n",
3541 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
3542 }
3543 } else {
3544 if (ThreadPriorityVerbose) {
3545 tty->print_cr("Unknown new scheduling class %d\n", new_class);
3546 }
3547 return EINVAL; // no clue, punt
3548 }
3549
3550 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3551 if (ThreadPriorityVerbose && rslt) {
3552 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3553 }
3554 if (rslt < 0) return errno;
3555
3556 #ifdef ASSERT
3557 // Sanity check: read back what we just attempted to set.
3558 // In theory it could have changed in the interim ...
3559 //
3560 // The priocntl system call is tricky.
3561 // Sometimes it'll validate the priority value argument and
3562 // return EINVAL if unhappy. At other times it fails silently.
3563 // Readbacks are prudent.
3564
3565 if (!ReadBackValidate) return 0;
3566
3567 memset(&ReadBack, 0, sizeof(pcparms_t));
3568 ReadBack.pc_cid = PC_CLNULL;
3569 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3570 assert(rslt >= 0, "priocntl failed");
3571 Actual = Expected = 0xBAD;
3572 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3573 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3574 Actual = RTPRI(ReadBack)->rt_pri;
3575 Expected = RTPRI(ParmInfo)->rt_pri;
3576 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3577 Actual = IAPRI(ReadBack)->ia_upri;
3578 Expected = IAPRI(ParmInfo)->ia_upri;
3579 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3580 Actual = TSPRI(ReadBack)->ts_upri;
3581 Expected = TSPRI(ParmInfo)->ts_upri;
3582 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3583 Actual = FXPRI(ReadBack)->fx_upri;
3584 Expected = FXPRI(ParmInfo)->fx_upri;
3585 } else {
3586 if (ThreadPriorityVerbose) {
3587 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
3588 ParmInfo.pc_cid);
3589 }
3590 }
3591
3592 if (Actual != Expected) {
3593 if (ThreadPriorityVerbose) {
3594 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3595 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3596 }
3597 }
3598 #endif
3599
3600 return 0;
3601 }
3602
3603 // Solaris only gives access to 128 real priorities at a time,
3604 // so we expand Java's ten to fill this range. This would be better
3605 // if we dynamically adjusted relative priorities.
3606 //
3607 // The ThreadPriorityPolicy option allows us to select 2 different
3608 // priority scales.
3609 //
3610 // ThreadPriorityPolicy=0
3611 // Since the Solaris' default priority is MaximumPriority, we do not
3612 // set a priority lower than Max unless a priority lower than
3613 // NormPriority is requested.
3614 //
3615 // ThreadPriorityPolicy=1
3616 // This mode causes the priority table to get filled with
3617 // linear values. NormPriority get's mapped to 50% of the
3618 // Maximum priority an so on. This will cause VM threads
3619 // to get unfair treatment against other Solaris processes
3620 // which do not explicitly alter their thread priorities.
3621
3622 int os::java_to_os_priority[CriticalPriority + 1] = {
3623 -99999, // 0 Entry should never be used
3624
3625 0, // 1 MinPriority
3626 32, // 2
3627 64, // 3
3628
3629 96, // 4
3630 127, // 5 NormPriority
3631 127, // 6
3632
3633 127, // 7
3634 127, // 8
3635 127, // 9 NearMaxPriority
3636
3637 127, // 10 MaxPriority
3638
3639 -criticalPrio // 11 CriticalPriority
3640 };
3641
3642 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3643 OSThread* osthread = thread->osthread();
3644
3645 // Save requested priority in case the thread hasn't been started
3646 osthread->set_native_priority(newpri);
3647
3648 // Check for critical priority request
3649 bool fxcritical = false;
3650 if (newpri == -criticalPrio) {
3651 fxcritical = true;
3652 newpri = criticalPrio;
3653 }
3654
3655 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3656 if (!UseThreadPriorities) return OS_OK;
3657
3658 int status = 0;
3659
3660 if (!fxcritical) {
3661 // Use thr_setprio only if we have a priority that thr_setprio understands
3662 status = thr_setprio(thread->osthread()->thread_id(), newpri);
3663 }
3664
3665 int lwp_status =
3666 set_lwp_class_and_priority(osthread->thread_id(),
3667 osthread->lwp_id(),
3668 newpri,
3669 fxcritical ? fxLimits.schedPolicy : myClass,
3670 !fxcritical);
3671 if (lwp_status != 0 && fxcritical) {
3672 // Try again, this time without changing the scheduling class
3673 newpri = java_MaxPriority_to_os_priority;
3674 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
3675 osthread->lwp_id(),
3676 newpri, myClass, false);
3677 }
3678 status |= lwp_status;
3679 return (status == 0) ? OS_OK : OS_ERR;
3680 }
3681
3682
3683 OSReturn os::get_native_priority(const Thread* const thread,
3684 int *priority_ptr) {
3685 int p;
3686 if (!UseThreadPriorities) {
3687 *priority_ptr = NormalPriority;
3688 return OS_OK;
3689 }
3690 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3691 if (status != 0) {
3692 return OS_ERR;
3693 }
3694 *priority_ptr = p;
3695 return OS_OK;
3696 }
3697
3698
3699 // Hint to the underlying OS that a task switch would not be good.
3700 // Void return because it's a hint and can fail.
3701 void os::hint_no_preempt() {
3702 schedctl_start(schedctl_init());
3703 }
3704
3705 static void resume_clear_context(OSThread *osthread) {
3706 osthread->set_ucontext(NULL);
3707 }
3708
3709 static void suspend_save_context(OSThread *osthread, ucontext_t* context) {
3710 osthread->set_ucontext(context);
3711 }
3712
3713 static Semaphore sr_semaphore;
3714
3715 void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) {
3716 // Save and restore errno to avoid confusing native code with EINTR
3717 // after sigsuspend.
3718 int old_errno = errno;
3719
3720 OSThread* osthread = thread->osthread();
3721 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
3722
3723 os::SuspendResume::State current = osthread->sr.state();
3724 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
3725 suspend_save_context(osthread, uc);
3726
3727 // attempt to switch the state, we assume we had a SUSPEND_REQUEST
3728 os::SuspendResume::State state = osthread->sr.suspended();
3729 if (state == os::SuspendResume::SR_SUSPENDED) {
3730 sigset_t suspend_set; // signals for sigsuspend()
3731
3732 // get current set of blocked signals and unblock resume signal
3733 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set);
3734 sigdelset(&suspend_set, os::Solaris::SIGasync());
3735
3736 sr_semaphore.signal();
3737 // wait here until we are resumed
3738 while (1) {
3739 sigsuspend(&suspend_set);
3740
3741 os::SuspendResume::State result = osthread->sr.running();
3742 if (result == os::SuspendResume::SR_RUNNING) {
3743 sr_semaphore.signal();
3744 break;
3745 }
3746 }
3747
3748 } else if (state == os::SuspendResume::SR_RUNNING) {
3749 // request was cancelled, continue
3750 } else {
3751 ShouldNotReachHere();
3752 }
3753
3754 resume_clear_context(osthread);
3755 } else if (current == os::SuspendResume::SR_RUNNING) {
3756 // request was cancelled, continue
3757 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
3758 // ignore
3759 } else {
3760 // ignore
3761 }
3762
3763 errno = old_errno;
3764 }
3765
3766 void os::print_statistics() {
3767 }
3768
3769 int os::message_box(const char* title, const char* message) {
3770 int i;
3771 fdStream err(defaultStream::error_fd());
3772 for (i = 0; i < 78; i++) err.print_raw("=");
3773 err.cr();
3774 err.print_raw_cr(title);
3775 for (i = 0; i < 78; i++) err.print_raw("-");
3776 err.cr();
3777 err.print_raw_cr(message);
3778 for (i = 0; i < 78; i++) err.print_raw("=");
3779 err.cr();
3780
3781 char buf[16];
3782 // Prevent process from exiting upon "read error" without consuming all CPU
3783 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3784
3785 return buf[0] == 'y' || buf[0] == 'Y';
3786 }
3787
3788 static int sr_notify(OSThread* osthread) {
3789 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync());
3790 assert_status(status == 0, status, "thr_kill");
3791 return status;
3792 }
3793
3794 // "Randomly" selected value for how long we want to spin
3795 // before bailing out on suspending a thread, also how often
3796 // we send a signal to a thread we want to resume
3797 static const int RANDOMLY_LARGE_INTEGER = 1000000;
3798 static const int RANDOMLY_LARGE_INTEGER2 = 100;
3799
3800 static bool do_suspend(OSThread* osthread) {
3801 assert(osthread->sr.is_running(), "thread should be running");
3802 assert(!sr_semaphore.trywait(), "semaphore has invalid state");
3803
3804 // mark as suspended and send signal
3805 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
3806 // failed to switch, state wasn't running?
3807 ShouldNotReachHere();
3808 return false;
3809 }
3810
3811 if (sr_notify(osthread) != 0) {
3812 ShouldNotReachHere();
3813 }
3814
3815 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
3816 while (true) {
3817 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) {
3818 break;
3819 } else {
3820 // timeout
3821 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
3822 if (cancelled == os::SuspendResume::SR_RUNNING) {
3823 return false;
3824 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
3825 // make sure that we consume the signal on the semaphore as well
3826 sr_semaphore.wait();
3827 break;
3828 } else {
3829 ShouldNotReachHere();
3830 return false;
3831 }
3832 }
3833 }
3834
3835 guarantee(osthread->sr.is_suspended(), "Must be suspended");
3836 return true;
3837 }
3838
3839 static void do_resume(OSThread* osthread) {
3840 assert(osthread->sr.is_suspended(), "thread should be suspended");
3841 assert(!sr_semaphore.trywait(), "invalid semaphore state");
3842
3843 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
3844 // failed to switch to WAKEUP_REQUEST
3845 ShouldNotReachHere();
3846 return;
3847 }
3848
3849 while (true) {
3850 if (sr_notify(osthread) == 0) {
3851 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) {
3852 if (osthread->sr.is_running()) {
3853 return;
3854 }
3855 }
3856 } else {
3857 ShouldNotReachHere();
3858 }
3859 }
3860
3861 guarantee(osthread->sr.is_running(), "Must be running!");
3862 }
3863
3864 void os::SuspendedThreadTask::internal_do_task() {
3865 if (do_suspend(_thread->osthread())) {
3866 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
3867 do_task(context);
3868 do_resume(_thread->osthread());
3869 }
3870 }
3871
3872 class PcFetcher : public os::SuspendedThreadTask {
3873 public:
3874 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {}
3875 ExtendedPC result();
3876 protected:
3877 void do_task(const os::SuspendedThreadTaskContext& context);
3878 private:
3879 ExtendedPC _epc;
3880 };
3881
3882 ExtendedPC PcFetcher::result() {
3883 guarantee(is_done(), "task is not done yet.");
3884 return _epc;
3885 }
3886
3887 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) {
3888 Thread* thread = context.thread();
3889 OSThread* osthread = thread->osthread();
3890 if (osthread->ucontext() != NULL) {
3891 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext());
3892 } else {
3893 // NULL context is unexpected, double-check this is the VMThread
3894 guarantee(thread->is_VM_thread(), "can only be called for VMThread");
3895 }
3896 }
3897
3898 // A lightweight implementation that does not suspend the target thread and
3899 // thus returns only a hint. Used for profiling only!
3900 ExtendedPC os::get_thread_pc(Thread* thread) {
3901 // Make sure that it is called by the watcher and the Threads lock is owned.
3902 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
3903 // For now, is only used to profile the VM Thread
3904 assert(thread->is_VM_thread(), "Can only be called for VMThread");
3905 PcFetcher fetcher(thread);
3906 fetcher.run();
3907 return fetcher.result();
3908 }
3909
3910
3911 // This does not do anything on Solaris. This is basically a hook for being
3912 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
3913 void os::os_exception_wrapper(java_call_t f, JavaValue* value,
3914 methodHandle* method, JavaCallArguments* args,
3915 Thread* thread) {
3916 f(value, method, args, thread);
3917 }
3918
3919 // This routine may be used by user applications as a "hook" to catch signals.
3920 // The user-defined signal handler must pass unrecognized signals to this
3921 // routine, and if it returns true (non-zero), then the signal handler must
3922 // return immediately. If the flag "abort_if_unrecognized" is true, then this
3923 // routine will never retun false (zero), but instead will execute a VM panic
3924 // routine kill the process.
3925 //
3926 // If this routine returns false, it is OK to call it again. This allows
3927 // the user-defined signal handler to perform checks either before or after
3928 // the VM performs its own checks. Naturally, the user code would be making
3929 // a serious error if it tried to handle an exception (such as a null check
3930 // or breakpoint) that the VM was generating for its own correct operation.
3931 //
3932 // This routine may recognize any of the following kinds of signals:
3933 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
3934 // os::Solaris::SIGasync
3935 // It should be consulted by handlers for any of those signals.
3936 // It explicitly does not recognize os::Solaris::SIGinterrupt
3937 //
3938 // The caller of this routine must pass in the three arguments supplied
3939 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
3940 // field of the structure passed to sigaction(). This routine assumes that
3941 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
3942 //
3943 // Note that the VM will print warnings if it detects conflicting signal
3944 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
3945 //
3946 extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo,
3947 siginfo_t* siginfo,
3948 void* ucontext,
3949 int abort_if_unrecognized);
3950
3951
3952 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
3953 int orig_errno = errno; // Preserve errno value over signal handler.
3954 JVM_handle_solaris_signal(sig, info, ucVoid, true);
3955 errno = orig_errno;
3956 }
3957
3958 // Do not delete - if guarantee is ever removed, a signal handler (even empty)
3959 // is needed to provoke threads blocked on IO to return an EINTR
3960 // Note: this explicitly does NOT call JVM_handle_solaris_signal and
3961 // does NOT participate in signal chaining due to requirement for
3962 // NOT setting SA_RESTART to make EINTR work.
3963 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
3964 if (UseSignalChaining) {
3965 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
3966 if (actp && actp->sa_handler) {
3967 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
3968 }
3969 }
3970 }
3971
3972 // This boolean allows users to forward their own non-matching signals
3973 // to JVM_handle_solaris_signal, harmlessly.
3974 bool os::Solaris::signal_handlers_are_installed = false;
3975
3976 // For signal-chaining
3977 bool os::Solaris::libjsig_is_loaded = false;
3978 typedef struct sigaction *(*get_signal_t)(int);
3979 get_signal_t os::Solaris::get_signal_action = NULL;
3980
3981 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
3982 struct sigaction *actp = NULL;
3983
3984 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
3985 // Retrieve the old signal handler from libjsig
3986 actp = (*get_signal_action)(sig);
3987 }
3988 if (actp == NULL) {
3989 // Retrieve the preinstalled signal handler from jvm
3990 actp = get_preinstalled_handler(sig);
3991 }
3992
3993 return actp;
3994 }
3995
3996 static bool call_chained_handler(struct sigaction *actp, int sig,
3997 siginfo_t *siginfo, void *context) {
3998 // Call the old signal handler
3999 if (actp->sa_handler == SIG_DFL) {
4000 // It's more reasonable to let jvm treat it as an unexpected exception
4001 // instead of taking the default action.
4002 return false;
4003 } else if (actp->sa_handler != SIG_IGN) {
4004 if ((actp->sa_flags & SA_NODEFER) == 0) {
4005 // automaticlly block the signal
4006 sigaddset(&(actp->sa_mask), sig);
4007 }
4008
4009 sa_handler_t hand;
4010 sa_sigaction_t sa;
4011 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4012 // retrieve the chained handler
4013 if (siginfo_flag_set) {
4014 sa = actp->sa_sigaction;
4015 } else {
4016 hand = actp->sa_handler;
4017 }
4018
4019 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4020 actp->sa_handler = SIG_DFL;
4021 }
4022
4023 // try to honor the signal mask
4024 sigset_t oset;
4025 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4026
4027 // call into the chained handler
4028 if (siginfo_flag_set) {
4029 (*sa)(sig, siginfo, context);
4030 } else {
4031 (*hand)(sig);
4032 }
4033
4034 // restore the signal mask
4035 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4036 }
4037 // Tell jvm's signal handler the signal is taken care of.
4038 return true;
4039 }
4040
4041 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4042 bool chained = false;
4043 // signal-chaining
4044 if (UseSignalChaining) {
4045 struct sigaction *actp = get_chained_signal_action(sig);
4046 if (actp != NULL) {
4047 chained = call_chained_handler(actp, sig, siginfo, context);
4048 }
4049 }
4050 return chained;
4051 }
4052
4053 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4054 assert((chainedsigactions != (struct sigaction *)NULL) &&
4055 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4056 if (preinstalled_sigs[sig] != 0) {
4057 return &chainedsigactions[sig];
4058 }
4059 return NULL;
4060 }
4061
4062 void os::Solaris::save_preinstalled_handler(int sig,
4063 struct sigaction& oldAct) {
4064 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4065 assert((chainedsigactions != (struct sigaction *)NULL) &&
4066 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4067 chainedsigactions[sig] = oldAct;
4068 preinstalled_sigs[sig] = 1;
4069 }
4070
4071 void os::Solaris::set_signal_handler(int sig, bool set_installed,
4072 bool oktochain) {
4073 // Check for overwrite.
4074 struct sigaction oldAct;
4075 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4076 void* oldhand =
4077 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4078 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4079 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4080 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4081 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4082 if (AllowUserSignalHandlers || !set_installed) {
4083 // Do not overwrite; user takes responsibility to forward to us.
4084 return;
4085 } else if (UseSignalChaining) {
4086 if (oktochain) {
4087 // save the old handler in jvm
4088 save_preinstalled_handler(sig, oldAct);
4089 } else {
4090 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4091 }
4092 // libjsig also interposes the sigaction() call below and saves the
4093 // old sigaction on it own.
4094 } else {
4095 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4096 "%#lx for signal %d.", (long)oldhand, sig));
4097 }
4098 }
4099
4100 struct sigaction sigAct;
4101 sigfillset(&(sigAct.sa_mask));
4102 sigAct.sa_handler = SIG_DFL;
4103
4104 sigAct.sa_sigaction = signalHandler;
4105 // Handle SIGSEGV on alternate signal stack if
4106 // not using stack banging
4107 if (!UseStackBanging && sig == SIGSEGV) {
4108 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4109 } else if (sig == os::Solaris::SIGinterrupt()) {
4110 // Interruptible i/o requires SA_RESTART cleared so EINTR
4111 // is returned instead of restarting system calls
4112 sigemptyset(&sigAct.sa_mask);
4113 sigAct.sa_handler = NULL;
4114 sigAct.sa_flags = SA_SIGINFO;
4115 sigAct.sa_sigaction = sigINTRHandler;
4116 } else {
4117 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4118 }
4119 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4120
4121 sigaction(sig, &sigAct, &oldAct);
4122
4123 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4124 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4125 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4126 }
4127
4128
4129 #define DO_SIGNAL_CHECK(sig) \
4130 do { \
4131 if (!sigismember(&check_signal_done, sig)) { \
4132 os::Solaris::check_signal_handler(sig); \
4133 } \
4134 } while (0)
4135
4136 // This method is a periodic task to check for misbehaving JNI applications
4137 // under CheckJNI, we can add any periodic checks here
4138
4139 void os::run_periodic_checks() {
4140 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4141 // thereby preventing a NULL checks.
4142 if (!check_addr0_done) check_addr0_done = check_addr0(tty);
4143
4144 if (check_signals == false) return;
4145
4146 // SEGV and BUS if overridden could potentially prevent
4147 // generation of hs*.log in the event of a crash, debugging
4148 // such a case can be very challenging, so we absolutely
4149 // check for the following for a good measure:
4150 DO_SIGNAL_CHECK(SIGSEGV);
4151 DO_SIGNAL_CHECK(SIGILL);
4152 DO_SIGNAL_CHECK(SIGFPE);
4153 DO_SIGNAL_CHECK(SIGBUS);
4154 DO_SIGNAL_CHECK(SIGPIPE);
4155 DO_SIGNAL_CHECK(SIGXFSZ);
4156
4157 // ReduceSignalUsage allows the user to override these handlers
4158 // see comments at the very top and jvm_solaris.h
4159 if (!ReduceSignalUsage) {
4160 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4161 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4162 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4163 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4164 }
4165
4166 // See comments above for using JVM1/JVM2 and UseAltSigs
4167 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4168 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4169
4170 }
4171
4172 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4173
4174 static os_sigaction_t os_sigaction = NULL;
4175
4176 void os::Solaris::check_signal_handler(int sig) {
4177 char buf[O_BUFLEN];
4178 address jvmHandler = NULL;
4179
4180 struct sigaction act;
4181 if (os_sigaction == NULL) {
4182 // only trust the default sigaction, in case it has been interposed
4183 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4184 if (os_sigaction == NULL) return;
4185 }
4186
4187 os_sigaction(sig, (struct sigaction*)NULL, &act);
4188
4189 address thisHandler = (act.sa_flags & SA_SIGINFO)
4190 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4191 : CAST_FROM_FN_PTR(address, act.sa_handler);
4192
4193
4194 switch (sig) {
4195 case SIGSEGV:
4196 case SIGBUS:
4197 case SIGFPE:
4198 case SIGPIPE:
4199 case SIGXFSZ:
4200 case SIGILL:
4201 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4202 break;
4203
4204 case SHUTDOWN1_SIGNAL:
4205 case SHUTDOWN2_SIGNAL:
4206 case SHUTDOWN3_SIGNAL:
4207 case BREAK_SIGNAL:
4208 jvmHandler = (address)user_handler();
4209 break;
4210
4211 default:
4212 int intrsig = os::Solaris::SIGinterrupt();
4213 int asynsig = os::Solaris::SIGasync();
4214
4215 if (sig == intrsig) {
4216 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4217 } else if (sig == asynsig) {
4218 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4219 } else {
4220 return;
4221 }
4222 break;
4223 }
4224
4225
4226 if (thisHandler != jvmHandler) {
4227 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4228 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4229 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4230 // No need to check this sig any longer
4231 sigaddset(&check_signal_done, sig);
4232 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN
4233 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) {
4234 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell",
4235 exception_name(sig, buf, O_BUFLEN));
4236 }
4237 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4238 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4239 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4240 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4241 // No need to check this sig any longer
4242 sigaddset(&check_signal_done, sig);
4243 }
4244
4245 // Print all the signal handler state
4246 if (sigismember(&check_signal_done, sig)) {
4247 print_signal_handlers(tty, buf, O_BUFLEN);
4248 }
4249
4250 }
4251
4252 void os::Solaris::install_signal_handlers() {
4253 bool libjsigdone = false;
4254 signal_handlers_are_installed = true;
4255
4256 // signal-chaining
4257 typedef void (*signal_setting_t)();
4258 signal_setting_t begin_signal_setting = NULL;
4259 signal_setting_t end_signal_setting = NULL;
4260 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4261 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4262 if (begin_signal_setting != NULL) {
4263 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4264 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4265 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4266 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4267 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4268 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4269 libjsig_is_loaded = true;
4270 if (os::Solaris::get_libjsig_version != NULL) {
4271 libjsigversion = (*os::Solaris::get_libjsig_version)();
4272 }
4273 assert(UseSignalChaining, "should enable signal-chaining");
4274 }
4275 if (libjsig_is_loaded) {
4276 // Tell libjsig jvm is setting signal handlers
4277 (*begin_signal_setting)();
4278 }
4279
4280 set_signal_handler(SIGSEGV, true, true);
4281 set_signal_handler(SIGPIPE, true, true);
4282 set_signal_handler(SIGXFSZ, true, true);
4283 set_signal_handler(SIGBUS, true, true);
4284 set_signal_handler(SIGILL, true, true);
4285 set_signal_handler(SIGFPE, true, true);
4286
4287
4288 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4289
4290 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4291 // can not register overridable signals which might be > 32
4292 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4293 // Tell libjsig jvm has finished setting signal handlers
4294 (*end_signal_setting)();
4295 libjsigdone = true;
4296 }
4297 }
4298
4299 // Never ok to chain our SIGinterrupt
4300 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4301 set_signal_handler(os::Solaris::SIGasync(), true, true);
4302
4303 if (libjsig_is_loaded && !libjsigdone) {
4304 // Tell libjsig jvm finishes setting signal handlers
4305 (*end_signal_setting)();
4306 }
4307
4308 // We don't activate signal checker if libjsig is in place, we trust ourselves
4309 // and if UserSignalHandler is installed all bets are off.
4310 // Log that signal checking is off only if -verbose:jni is specified.
4311 if (CheckJNICalls) {
4312 if (libjsig_is_loaded) {
4313 if (PrintJNIResolving) {
4314 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4315 }
4316 check_signals = false;
4317 }
4318 if (AllowUserSignalHandlers) {
4319 if (PrintJNIResolving) {
4320 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4321 }
4322 check_signals = false;
4323 }
4324 }
4325 }
4326
4327
4328 void report_error(const char* file_name, int line_no, const char* title,
4329 const char* format, ...);
4330
4331 const char * signames[] = {
4332 "SIG0",
4333 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4334 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4335 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4336 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4337 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4338 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4339 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4340 "SIGCANCEL", "SIGLOST"
4341 };
4342
4343 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4344 if (0 < exception_code && exception_code <= SIGRTMAX) {
4345 // signal
4346 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4347 jio_snprintf(buf, size, "%s", signames[exception_code]);
4348 } else {
4349 jio_snprintf(buf, size, "SIG%d", exception_code);
4350 }
4351 return buf;
4352 } else {
4353 return NULL;
4354 }
4355 }
4356
4357 // (Static) wrapper for getisax(2) call.
4358 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4359
4360 // (Static) wrappers for the liblgrp API
4361 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4362 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4363 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4364 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4365 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4366 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4367 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4368 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4369 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4370
4371 // (Static) wrapper for meminfo() call.
4372 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4373
4374 static address resolve_symbol_lazy(const char* name) {
4375 address addr = (address) dlsym(RTLD_DEFAULT, name);
4376 if (addr == NULL) {
4377 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4378 addr = (address) dlsym(RTLD_NEXT, name);
4379 }
4380 return addr;
4381 }
4382
4383 static address resolve_symbol(const char* name) {
4384 address addr = resolve_symbol_lazy(name);
4385 if (addr == NULL) {
4386 fatal(dlerror());
4387 }
4388 return addr;
4389 }
4390
4391 void os::Solaris::libthread_init() {
4392 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4393
4394 lwp_priocntl_init();
4395
4396 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4397 if (func == NULL) {
4398 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4399 // Guarantee that this VM is running on an new enough OS (5.6 or
4400 // later) that it will have a new enough libthread.so.
4401 guarantee(func != NULL, "libthread.so is too old.");
4402 }
4403
4404 int size;
4405 void (*handler_info_func)(address *, int *);
4406 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4407 handler_info_func(&handler_start, &size);
4408 handler_end = handler_start + size;
4409 }
4410
4411
4412 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4413 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4414 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4415 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4416 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4417 int os::Solaris::_mutex_scope = USYNC_THREAD;
4418
4419 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4420 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4421 int_fnP_cond_tP os::Solaris::_cond_signal;
4422 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4423 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4424 int_fnP_cond_tP os::Solaris::_cond_destroy;
4425 int os::Solaris::_cond_scope = USYNC_THREAD;
4426
4427 void os::Solaris::synchronization_init() {
4428 if (UseLWPSynchronization) {
4429 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4430 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4431 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4432 os::Solaris::set_mutex_init(lwp_mutex_init);
4433 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4434 os::Solaris::set_mutex_scope(USYNC_THREAD);
4435
4436 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4437 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4438 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4439 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4440 os::Solaris::set_cond_init(lwp_cond_init);
4441 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4442 os::Solaris::set_cond_scope(USYNC_THREAD);
4443 } else {
4444 os::Solaris::set_mutex_scope(USYNC_THREAD);
4445 os::Solaris::set_cond_scope(USYNC_THREAD);
4446
4447 if (UsePthreads) {
4448 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4449 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4450 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4451 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4452 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4453
4454 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4455 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4456 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4457 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4458 os::Solaris::set_cond_init(pthread_cond_default_init);
4459 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4460 } else {
4461 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4462 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4463 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4464 os::Solaris::set_mutex_init(::mutex_init);
4465 os::Solaris::set_mutex_destroy(::mutex_destroy);
4466
4467 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4468 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4469 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4470 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4471 os::Solaris::set_cond_init(::cond_init);
4472 os::Solaris::set_cond_destroy(::cond_destroy);
4473 }
4474 }
4475 }
4476
4477 bool os::Solaris::liblgrp_init() {
4478 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4479 if (handle != NULL) {
4480 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4481 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4482 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4483 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4484 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4485 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4486 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4487 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4488 dlsym(handle, "lgrp_cookie_stale")));
4489
4490 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4491 set_lgrp_cookie(c);
4492 return true;
4493 }
4494 return false;
4495 }
4496
4497 void os::Solaris::misc_sym_init() {
4498 address func;
4499
4500 // getisax
4501 func = resolve_symbol_lazy("getisax");
4502 if (func != NULL) {
4503 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4504 }
4505
4506 // meminfo
4507 func = resolve_symbol_lazy("meminfo");
4508 if (func != NULL) {
4509 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4510 }
4511 }
4512
4513 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4514 assert(_getisax != NULL, "_getisax not set");
4515 return _getisax(array, n);
4516 }
4517
4518 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4519 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4520 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4521
4522 void init_pset_getloadavg_ptr(void) {
4523 pset_getloadavg_ptr =
4524 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4525 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4526 warning("pset_getloadavg function not found");
4527 }
4528 }
4529
4530 int os::Solaris::_dev_zero_fd = -1;
4531
4532 // this is called _before_ the global arguments have been parsed
4533 void os::init(void) {
4534 _initial_pid = getpid();
4535
4536 max_hrtime = first_hrtime = gethrtime();
4537
4538 init_random(1234567);
4539
4540 page_size = sysconf(_SC_PAGESIZE);
4541 if (page_size == -1) {
4542 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4543 strerror(errno)));
4544 }
4545 init_page_sizes((size_t) page_size);
4546
4547 Solaris::initialize_system_info();
4548
4549 // Initialize misc. symbols as soon as possible, so we can use them
4550 // if we need them.
4551 Solaris::misc_sym_init();
4552
4553 int fd = ::open("/dev/zero", O_RDWR);
4554 if (fd < 0) {
4555 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
4556 } else {
4557 Solaris::set_dev_zero_fd(fd);
4558
4559 // Close on exec, child won't inherit.
4560 fcntl(fd, F_SETFD, FD_CLOEXEC);
4561 }
4562
4563 clock_tics_per_sec = CLK_TCK;
4564
4565 // check if dladdr1() exists; dladdr1 can provide more information than
4566 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4567 // and is available on linker patches for 5.7 and 5.8.
4568 // libdl.so must have been loaded, this call is just an entry lookup
4569 void * hdl = dlopen("libdl.so", RTLD_NOW);
4570 if (hdl) {
4571 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4572 }
4573
4574 // (Solaris only) this switches to calls that actually do locking.
4575 ThreadCritical::initialize();
4576
4577 main_thread = thr_self();
4578
4579 // Constant minimum stack size allowed. It must be at least
4580 // the minimum of what the OS supports (thr_min_stack()), and
4581 // enough to allow the thread to get to user bytecode execution.
4582 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4583 // If the pagesize of the VM is greater than 8K determine the appropriate
4584 // number of initial guard pages. The user can change this with the
4585 // command line arguments, if needed.
4586 if (vm_page_size() > 8*K) {
4587 StackYellowPages = 1;
4588 StackRedPages = 1;
4589 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4590 }
4591 }
4592
4593 // To install functions for atexit system call
4594 extern "C" {
4595 static void perfMemory_exit_helper() {
4596 perfMemory_exit();
4597 }
4598 }
4599
4600 // this is called _after_ the global arguments have been parsed
4601 jint os::init_2(void) {
4602 // try to enable extended file IO ASAP, see 6431278
4603 os::Solaris::try_enable_extended_io();
4604
4605 // Allocate a single page and mark it as readable for safepoint polling. Also
4606 // use this first mmap call to check support for MAP_ALIGN.
4607 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4608 page_size,
4609 MAP_PRIVATE | MAP_ALIGN,
4610 PROT_READ);
4611 if (polling_page == NULL) {
4612 has_map_align = false;
4613 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4614 PROT_READ);
4615 }
4616
4617 os::set_polling_page(polling_page);
4618
4619 #ifndef PRODUCT
4620 if (Verbose && PrintMiscellaneous) {
4621 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n",
4622 (intptr_t)polling_page);
4623 }
4624 #endif
4625
4626 if (!UseMembar) {
4627 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE);
4628 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page");
4629 os::set_memory_serialize_page(mem_serialize_page);
4630
4631 #ifndef PRODUCT
4632 if (Verbose && PrintMiscellaneous) {
4633 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n",
4634 (intptr_t)mem_serialize_page);
4635 }
4636 #endif
4637 }
4638
4639 // Check minimum allowable stack size for thread creation and to initialize
4640 // the java system classes, including StackOverflowError - depends on page
4641 // size. Add a page for compiler2 recursion in main thread.
4642 // Add in 2*BytesPerWord times page size to account for VM stack during
4643 // class initialization depending on 32 or 64 bit VM.
4644 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
4645 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
4646 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
4647
4648 size_t threadStackSizeInBytes = ThreadStackSize * K;
4649 if (threadStackSizeInBytes != 0 &&
4650 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
4651 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
4652 os::Solaris::min_stack_allowed/K);
4653 return JNI_ERR;
4654 }
4655
4656 // For 64kbps there will be a 64kb page size, which makes
4657 // the usable default stack size quite a bit less. Increase the
4658 // stack for 64kb (or any > than 8kb) pages, this increases
4659 // virtual memory fragmentation (since we're not creating the
4660 // stack on a power of 2 boundary. The real fix for this
4661 // should be to fix the guard page mechanism.
4662
4663 if (vm_page_size() > 8*K) {
4664 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
4665 ? threadStackSizeInBytes +
4666 ((StackYellowPages + StackRedPages) * vm_page_size())
4667 : 0;
4668 ThreadStackSize = threadStackSizeInBytes/K;
4669 }
4670
4671 // Make the stack size a multiple of the page size so that
4672 // the yellow/red zones can be guarded.
4673 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
4674 vm_page_size()));
4675
4676 Solaris::libthread_init();
4677
4678 if (UseNUMA) {
4679 if (!Solaris::liblgrp_init()) {
4680 UseNUMA = false;
4681 } else {
4682 size_t lgrp_limit = os::numa_get_groups_num();
4683 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
4684 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4685 FREE_C_HEAP_ARRAY(int, lgrp_ids);
4686 if (lgrp_num < 2) {
4687 // There's only one locality group, disable NUMA.
4688 UseNUMA = false;
4689 }
4690 }
4691 if (!UseNUMA && ForceNUMA) {
4692 UseNUMA = true;
4693 }
4694 }
4695
4696 Solaris::signal_sets_init();
4697 Solaris::init_signal_mem();
4698 Solaris::install_signal_handlers();
4699
4700 if (libjsigversion < JSIG_VERSION_1_4_1) {
4701 Maxlibjsigsigs = OLDMAXSIGNUM;
4702 }
4703
4704 // initialize synchronization primitives to use either thread or
4705 // lwp synchronization (controlled by UseLWPSynchronization)
4706 Solaris::synchronization_init();
4707
4708 if (MaxFDLimit) {
4709 // set the number of file descriptors to max. print out error
4710 // if getrlimit/setrlimit fails but continue regardless.
4711 struct rlimit nbr_files;
4712 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4713 if (status != 0) {
4714 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4715 perror("os::init_2 getrlimit failed");
4716 }
4717 } else {
4718 nbr_files.rlim_cur = nbr_files.rlim_max;
4719 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4720 if (status != 0) {
4721 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4722 perror("os::init_2 setrlimit failed");
4723 }
4724 }
4725 }
4726 }
4727
4728 // Calculate theoretical max. size of Threads to guard gainst
4729 // artifical out-of-memory situations, where all available address-
4730 // space has been reserved by thread stacks. Default stack size is 1Mb.
4731 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
4732 JavaThread::stack_size_at_create() : (1*K*K);
4733 assert(pre_thread_stack_size != 0, "Must have a stack");
4734 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
4735 // we should start doing Virtual Memory banging. Currently when the threads will
4736 // have used all but 200Mb of space.
4737 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
4738 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
4739
4740 // at-exit methods are called in the reverse order of their registration.
4741 // In Solaris 7 and earlier, atexit functions are called on return from
4742 // main or as a result of a call to exit(3C). There can be only 32 of
4743 // these functions registered and atexit() does not set errno. In Solaris
4744 // 8 and later, there is no limit to the number of functions registered
4745 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
4746 // functions are called upon dlclose(3DL) in addition to return from main
4747 // and exit(3C).
4748
4749 if (PerfAllowAtExitRegistration) {
4750 // only register atexit functions if PerfAllowAtExitRegistration is set.
4751 // atexit functions can be delayed until process exit time, which
4752 // can be problematic for embedded VM situations. Embedded VMs should
4753 // call DestroyJavaVM() to assure that VM resources are released.
4754
4755 // note: perfMemory_exit_helper atexit function may be removed in
4756 // the future if the appropriate cleanup code can be added to the
4757 // VM_Exit VMOperation's doit method.
4758 if (atexit(perfMemory_exit_helper) != 0) {
4759 warning("os::init2 atexit(perfMemory_exit_helper) failed");
4760 }
4761 }
4762
4763 // Init pset_loadavg function pointer
4764 init_pset_getloadavg_ptr();
4765
4766 return JNI_OK;
4767 }
4768
4769 // Mark the polling page as unreadable
4770 void os::make_polling_page_unreadable(void) {
4771 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) {
4772 fatal("Could not disable polling page");
4773 }
4774 }
4775
4776 // Mark the polling page as readable
4777 void os::make_polling_page_readable(void) {
4778 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) {
4779 fatal("Could not enable polling page");
4780 }
4781 }
4782
4783 // OS interface.
4784
4785 bool os::check_heap(bool force) { return true; }
4786
4787 // Is a (classpath) directory empty?
4788 bool os::dir_is_empty(const char* path) {
4789 DIR *dir = NULL;
4790 struct dirent *ptr;
4791
4792 dir = opendir(path);
4793 if (dir == NULL) return true;
4794
4795 // Scan the directory
4796 bool result = true;
4797 char buf[sizeof(struct dirent) + MAX_PATH];
4798 struct dirent *dbuf = (struct dirent *) buf;
4799 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
4800 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
4801 result = false;
4802 }
4803 }
4804 closedir(dir);
4805 return result;
4806 }
4807
4808 // This code originates from JDK's sysOpen and open64_w
4809 // from src/solaris/hpi/src/system_md.c
4810
4811 int os::open(const char *path, int oflag, int mode) {
4812 if (strlen(path) > MAX_PATH - 1) {
4813 errno = ENAMETOOLONG;
4814 return -1;
4815 }
4816 int fd;
4817
4818 fd = ::open64(path, oflag, mode);
4819 if (fd == -1) return -1;
4820
4821 // If the open succeeded, the file might still be a directory
4822 {
4823 struct stat64 buf64;
4824 int ret = ::fstat64(fd, &buf64);
4825 int st_mode = buf64.st_mode;
4826
4827 if (ret != -1) {
4828 if ((st_mode & S_IFMT) == S_IFDIR) {
4829 errno = EISDIR;
4830 ::close(fd);
4831 return -1;
4832 }
4833 } else {
4834 ::close(fd);
4835 return -1;
4836 }
4837 }
4838
4839 // 32-bit Solaris systems suffer from:
4840 //
4841 // - an historical default soft limit of 256 per-process file
4842 // descriptors that is too low for many Java programs.
4843 //
4844 // - a design flaw where file descriptors created using stdio
4845 // fopen must be less than 256, _even_ when the first limit above
4846 // has been raised. This can cause calls to fopen (but not calls to
4847 // open, for example) to fail mysteriously, perhaps in 3rd party
4848 // native code (although the JDK itself uses fopen). One can hardly
4849 // criticize them for using this most standard of all functions.
4850 //
4851 // We attempt to make everything work anyways by:
4852 //
4853 // - raising the soft limit on per-process file descriptors beyond
4854 // 256
4855 //
4856 // - As of Solaris 10u4, we can request that Solaris raise the 256
4857 // stdio fopen limit by calling function enable_extended_FILE_stdio.
4858 // This is done in init_2 and recorded in enabled_extended_FILE_stdio
4859 //
4860 // - If we are stuck on an old (pre 10u4) Solaris system, we can
4861 // workaround the bug by remapping non-stdio file descriptors below
4862 // 256 to ones beyond 256, which is done below.
4863 //
4864 // See:
4865 // 1085341: 32-bit stdio routines should support file descriptors >255
4866 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files
4867 // 6431278: Netbeans crash on 32 bit Solaris: need to call
4868 // enable_extended_FILE_stdio() in VM initialisation
4869 // Giri Mandalika's blog
4870 // http://technopark02.blogspot.com/2005_05_01_archive.html
4871 //
4872 #ifndef _LP64
4873 if ((!enabled_extended_FILE_stdio) && fd < 256) {
4874 int newfd = ::fcntl(fd, F_DUPFD, 256);
4875 if (newfd != -1) {
4876 ::close(fd);
4877 fd = newfd;
4878 }
4879 }
4880 #endif // 32-bit Solaris
4881
4882 // All file descriptors that are opened in the JVM and not
4883 // specifically destined for a subprocess should have the
4884 // close-on-exec flag set. If we don't set it, then careless 3rd
4885 // party native code might fork and exec without closing all
4886 // appropriate file descriptors (e.g. as we do in closeDescriptors in
4887 // UNIXProcess.c), and this in turn might:
4888 //
4889 // - cause end-of-file to fail to be detected on some file
4890 // descriptors, resulting in mysterious hangs, or
4891 //
4892 // - might cause an fopen in the subprocess to fail on a system
4893 // suffering from bug 1085341.
4894 //
4895 // (Yes, the default setting of the close-on-exec flag is a Unix
4896 // design flaw)
4897 //
4898 // See:
4899 // 1085341: 32-bit stdio routines should support file descriptors >255
4900 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed
4901 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
4902 //
4903 #ifdef FD_CLOEXEC
4904 {
4905 int flags = ::fcntl(fd, F_GETFD);
4906 if (flags != -1) {
4907 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
4908 }
4909 }
4910 #endif
4911
4912 return fd;
4913 }
4914
4915 // create binary file, rewriting existing file if required
4916 int os::create_binary_file(const char* path, bool rewrite_existing) {
4917 int oflags = O_WRONLY | O_CREAT;
4918 if (!rewrite_existing) {
4919 oflags |= O_EXCL;
4920 }
4921 return ::open64(path, oflags, S_IREAD | S_IWRITE);
4922 }
4923
4924 // return current position of file pointer
4925 jlong os::current_file_offset(int fd) {
4926 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
4927 }
4928
4929 // move file pointer to the specified offset
4930 jlong os::seek_to_file_offset(int fd, jlong offset) {
4931 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
4932 }
4933
4934 jlong os::lseek(int fd, jlong offset, int whence) {
4935 return (jlong) ::lseek64(fd, offset, whence);
4936 }
4937
4938 char * os::native_path(char *path) {
4939 return path;
4940 }
4941
4942 int os::ftruncate(int fd, jlong length) {
4943 return ::ftruncate64(fd, length);
4944 }
4945
4946 int os::fsync(int fd) {
4947 RESTARTABLE_RETURN_INT(::fsync(fd));
4948 }
4949
4950 int os::available(int fd, jlong *bytes) {
4951 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
4952 "Assumed _thread_in_native");
4953 jlong cur, end;
4954 int mode;
4955 struct stat64 buf64;
4956
4957 if (::fstat64(fd, &buf64) >= 0) {
4958 mode = buf64.st_mode;
4959 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
4960 int n,ioctl_return;
4961
4962 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return);
4963 if (ioctl_return>= 0) {
4964 *bytes = n;
4965 return 1;
4966 }
4967 }
4968 }
4969 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
4970 return 0;
4971 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
4972 return 0;
4973 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
4974 return 0;
4975 }
4976 *bytes = end - cur;
4977 return 1;
4978 }
4979
4980 // Map a block of memory.
4981 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
4982 char *addr, size_t bytes, bool read_only,
4983 bool allow_exec) {
4984 int prot;
4985 int flags;
4986
4987 if (read_only) {
4988 prot = PROT_READ;
4989 flags = MAP_SHARED;
4990 } else {
4991 prot = PROT_READ | PROT_WRITE;
4992 flags = MAP_PRIVATE;
4993 }
4994
4995 if (allow_exec) {
4996 prot |= PROT_EXEC;
4997 }
4998
4999 if (addr != NULL) {
5000 flags |= MAP_FIXED;
5001 }
5002
5003 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5004 fd, file_offset);
5005 if (mapped_address == MAP_FAILED) {
5006 return NULL;
5007 }
5008 return mapped_address;
5009 }
5010
5011
5012 // Remap a block of memory.
5013 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5014 char *addr, size_t bytes, bool read_only,
5015 bool allow_exec) {
5016 // same as map_memory() on this OS
5017 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5018 allow_exec);
5019 }
5020
5021
5022 // Unmap a block of memory.
5023 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5024 return munmap(addr, bytes) == 0;
5025 }
5026
5027 void os::pause() {
5028 char filename[MAX_PATH];
5029 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5030 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5031 } else {
5032 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5033 }
5034
5035 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5036 if (fd != -1) {
5037 struct stat buf;
5038 ::close(fd);
5039 while (::stat(filename, &buf) == 0) {
5040 (void)::poll(NULL, 0, 100);
5041 }
5042 } else {
5043 jio_fprintf(stderr,
5044 "Could not open pause file '%s', continuing immediately.\n", filename);
5045 }
5046 }
5047
5048 #ifndef PRODUCT
5049 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5050 // Turn this on if you need to trace synch operations.
5051 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5052 // and call record_synch_enable and record_synch_disable
5053 // around the computation of interest.
5054
5055 void record_synch(char* name, bool returning); // defined below
5056
5057 class RecordSynch {
5058 char* _name;
5059 public:
5060 RecordSynch(char* name) :_name(name) { record_synch(_name, false); }
5061 ~RecordSynch() { record_synch(_name, true); }
5062 };
5063
5064 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5065 extern "C" ret name params { \
5066 typedef ret name##_t params; \
5067 static name##_t* implem = NULL; \
5068 static int callcount = 0; \
5069 if (implem == NULL) { \
5070 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5071 if (implem == NULL) fatal(dlerror()); \
5072 } \
5073 ++callcount; \
5074 RecordSynch _rs(#name); \
5075 inner; \
5076 return implem args; \
5077 }
5078 // in dbx, examine callcounts this way:
5079 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5080
5081 #define CHECK_POINTER_OK(p) \
5082 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5083 #define CHECK_MU \
5084 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5085 #define CHECK_CV \
5086 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5087 #define CHECK_P(p) \
5088 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5089
5090 #define CHECK_MUTEX(mutex_op) \
5091 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5092
5093 CHECK_MUTEX( mutex_lock)
5094 CHECK_MUTEX( _mutex_lock)
5095 CHECK_MUTEX( mutex_unlock)
5096 CHECK_MUTEX(_mutex_unlock)
5097 CHECK_MUTEX( mutex_trylock)
5098 CHECK_MUTEX(_mutex_trylock)
5099
5100 #define CHECK_COND(cond_op) \
5101 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV);
5102
5103 CHECK_COND( cond_wait);
5104 CHECK_COND(_cond_wait);
5105 CHECK_COND(_cond_wait_cancel);
5106
5107 #define CHECK_COND2(cond_op) \
5108 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV);
5109
5110 CHECK_COND2( cond_timedwait);
5111 CHECK_COND2(_cond_timedwait);
5112 CHECK_COND2(_cond_timedwait_cancel);
5113
5114 // do the _lwp_* versions too
5115 #define mutex_t lwp_mutex_t
5116 #define cond_t lwp_cond_t
5117 CHECK_MUTEX( _lwp_mutex_lock)
5118 CHECK_MUTEX( _lwp_mutex_unlock)
5119 CHECK_MUTEX( _lwp_mutex_trylock)
5120 CHECK_MUTEX( __lwp_mutex_lock)
5121 CHECK_MUTEX( __lwp_mutex_unlock)
5122 CHECK_MUTEX( __lwp_mutex_trylock)
5123 CHECK_MUTEX(___lwp_mutex_lock)
5124 CHECK_MUTEX(___lwp_mutex_unlock)
5125
5126 CHECK_COND( _lwp_cond_wait);
5127 CHECK_COND( __lwp_cond_wait);
5128 CHECK_COND(___lwp_cond_wait);
5129
5130 CHECK_COND2( _lwp_cond_timedwait);
5131 CHECK_COND2( __lwp_cond_timedwait);
5132 #undef mutex_t
5133 #undef cond_t
5134
5135 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5136 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5137 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5138 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5139 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5140 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5141 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5142 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5143
5144
5145 // recording machinery:
5146
5147 enum { RECORD_SYNCH_LIMIT = 200 };
5148 char* record_synch_name[RECORD_SYNCH_LIMIT];
5149 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5150 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5151 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5152 int record_synch_count = 0;
5153 bool record_synch_enabled = false;
5154
5155 // in dbx, examine recorded data this way:
5156 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5157
5158 void record_synch(char* name, bool returning) {
5159 if (record_synch_enabled) {
5160 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5161 record_synch_name[record_synch_count] = name;
5162 record_synch_returning[record_synch_count] = returning;
5163 record_synch_thread[record_synch_count] = thr_self();
5164 record_synch_arg0ptr[record_synch_count] = &name;
5165 record_synch_count++;
5166 }
5167 // put more checking code here:
5168 // ...
5169 }
5170 }
5171
5172 void record_synch_enable() {
5173 // start collecting trace data, if not already doing so
5174 if (!record_synch_enabled) record_synch_count = 0;
5175 record_synch_enabled = true;
5176 }
5177
5178 void record_synch_disable() {
5179 // stop collecting trace data
5180 record_synch_enabled = false;
5181 }
5182
5183 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5184 #endif // PRODUCT
5185
5186 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5187 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5188 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5189
5190
5191 // JVMTI & JVM monitoring and management support
5192 // The thread_cpu_time() and current_thread_cpu_time() are only
5193 // supported if is_thread_cpu_time_supported() returns true.
5194 // They are not supported on Solaris T1.
5195
5196 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5197 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5198 // of a thread.
5199 //
5200 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5201 // returns the fast estimate available on the platform.
5202
5203 // hrtime_t gethrvtime() return value includes
5204 // user time but does not include system time
5205 jlong os::current_thread_cpu_time() {
5206 return (jlong) gethrvtime();
5207 }
5208
5209 jlong os::thread_cpu_time(Thread *thread) {
5210 // return user level CPU time only to be consistent with
5211 // what current_thread_cpu_time returns.
5212 // thread_cpu_time_info() must be changed if this changes
5213 return os::thread_cpu_time(thread, false /* user time only */);
5214 }
5215
5216 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5217 if (user_sys_cpu_time) {
5218 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5219 } else {
5220 return os::current_thread_cpu_time();
5221 }
5222 }
5223
5224 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5225 char proc_name[64];
5226 int count;
5227 prusage_t prusage;
5228 jlong lwp_time;
5229 int fd;
5230
5231 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5232 getpid(),
5233 thread->osthread()->lwp_id());
5234 fd = ::open(proc_name, O_RDONLY);
5235 if (fd == -1) return -1;
5236
5237 do {
5238 count = ::pread(fd,
5239 (void *)&prusage.pr_utime,
5240 thr_time_size,
5241 thr_time_off);
5242 } while (count < 0 && errno == EINTR);
5243 ::close(fd);
5244 if (count < 0) return -1;
5245
5246 if (user_sys_cpu_time) {
5247 // user + system CPU time
5248 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5249 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5250 (jlong)prusage.pr_stime.tv_nsec +
5251 (jlong)prusage.pr_utime.tv_nsec;
5252 } else {
5253 // user level CPU time only
5254 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5255 (jlong)prusage.pr_utime.tv_nsec;
5256 }
5257
5258 return (lwp_time);
5259 }
5260
5261 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5262 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5263 info_ptr->may_skip_backward = false; // elapsed time not wall time
5264 info_ptr->may_skip_forward = false; // elapsed time not wall time
5265 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5266 }
5267
5268 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5269 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5270 info_ptr->may_skip_backward = false; // elapsed time not wall time
5271 info_ptr->may_skip_forward = false; // elapsed time not wall time
5272 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5273 }
5274
5275 bool os::is_thread_cpu_time_supported() {
5276 return true;
5277 }
5278
5279 // System loadavg support. Returns -1 if load average cannot be obtained.
5280 // Return the load average for our processor set if the primitive exists
5281 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5282 int os::loadavg(double loadavg[], int nelem) {
5283 if (pset_getloadavg_ptr != NULL) {
5284 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5285 } else {
5286 return ::getloadavg(loadavg, nelem);
5287 }
5288 }
5289
5290 //---------------------------------------------------------------------------------
5291
5292 bool os::find(address addr, outputStream* st) {
5293 Dl_info dlinfo;
5294 memset(&dlinfo, 0, sizeof(dlinfo));
5295 if (dladdr(addr, &dlinfo) != 0) {
5296 st->print(PTR_FORMAT ": ", addr);
5297 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
5298 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5299 } else if (dlinfo.dli_fbase != NULL) {
5300 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5301 } else {
5302 st->print("<absolute address>");
5303 }
5304 if (dlinfo.dli_fname != NULL) {
5305 st->print(" in %s", dlinfo.dli_fname);
5306 }
5307 if (dlinfo.dli_fbase != NULL) {
5308 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
5309 }
5310 st->cr();
5311
5312 if (Verbose) {
5313 // decode some bytes around the PC
5314 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size());
5315 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size());
5316 address lowest = (address) dlinfo.dli_sname;
5317 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5318 if (begin < lowest) begin = lowest;
5319 Dl_info dlinfo2;
5320 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
5321 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) {
5322 end = (address) dlinfo2.dli_saddr;
5323 }
5324 Disassembler::decode(begin, end, st);
5325 }
5326 return true;
5327 }
5328 return false;
5329 }
5330
5331 // Following function has been added to support HotSparc's libjvm.so running
5332 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5333 // src/solaris/hpi/native_threads in the EVM codebase.
5334 //
5335 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5336 // libraries and should thus be removed. We will leave it behind for a while
5337 // until we no longer want to able to run on top of 1.3.0 Solaris production
5338 // JDK. See 4341971.
5339
5340 #define STACK_SLACK 0x800
5341
5342 extern "C" {
5343 intptr_t sysThreadAvailableStackWithSlack() {
5344 stack_t st;
5345 intptr_t retval, stack_top;
5346 retval = thr_stksegment(&st);
5347 assert(retval == 0, "incorrect return value from thr_stksegment");
5348 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5349 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5350 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5351 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5352 }
5353 }
5354
5355 // ObjectMonitor park-unpark infrastructure ...
5356 //
5357 // We implement Solaris and Linux PlatformEvents with the
5358 // obvious condvar-mutex-flag triple.
5359 // Another alternative that works quite well is pipes:
5360 // Each PlatformEvent consists of a pipe-pair.
5361 // The thread associated with the PlatformEvent
5362 // calls park(), which reads from the input end of the pipe.
5363 // Unpark() writes into the other end of the pipe.
5364 // The write-side of the pipe must be set NDELAY.
5365 // Unfortunately pipes consume a large # of handles.
5366 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5367 // Using pipes for the 1st few threads might be workable, however.
5368 //
5369 // park() is permitted to return spuriously.
5370 // Callers of park() should wrap the call to park() in
5371 // an appropriate loop. A litmus test for the correct
5372 // usage of park is the following: if park() were modified
5373 // to immediately return 0 your code should still work,
5374 // albeit degenerating to a spin loop.
5375 //
5376 // In a sense, park()-unpark() just provides more polite spinning
5377 // and polling with the key difference over naive spinning being
5378 // that a parked thread needs to be explicitly unparked() in order
5379 // to wake up and to poll the underlying condition.
5380 //
5381 // Assumption:
5382 // Only one parker can exist on an event, which is why we allocate
5383 // them per-thread. Multiple unparkers can coexist.
5384 //
5385 // _Event transitions in park()
5386 // -1 => -1 : illegal
5387 // 1 => 0 : pass - return immediately
5388 // 0 => -1 : block; then set _Event to 0 before returning
5389 //
5390 // _Event transitions in unpark()
5391 // 0 => 1 : just return
5392 // 1 => 1 : just return
5393 // -1 => either 0 or 1; must signal target thread
5394 // That is, we can safely transition _Event from -1 to either
5395 // 0 or 1.
5396 //
5397 // _Event serves as a restricted-range semaphore.
5398 // -1 : thread is blocked, i.e. there is a waiter
5399 // 0 : neutral: thread is running or ready,
5400 // could have been signaled after a wait started
5401 // 1 : signaled - thread is running or ready
5402 //
5403 // Another possible encoding of _Event would be with
5404 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5405 //
5406 // TODO-FIXME: add DTRACE probes for:
5407 // 1. Tx parks
5408 // 2. Ty unparks Tx
5409 // 3. Tx resumes from park
5410
5411
5412 // value determined through experimentation
5413 #define ROUNDINGFIX 11
5414
5415 // utility to compute the abstime argument to timedwait.
5416 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5417
5418 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5419 // millis is the relative timeout time
5420 // abstime will be the absolute timeout time
5421 if (millis < 0) millis = 0;
5422 struct timeval now;
5423 int status = gettimeofday(&now, NULL);
5424 assert(status == 0, "gettimeofday");
5425 jlong seconds = millis / 1000;
5426 jlong max_wait_period;
5427
5428 if (UseLWPSynchronization) {
5429 // forward port of fix for 4275818 (not sleeping long enough)
5430 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5431 // _lwp_cond_timedwait() used a round_down algorithm rather
5432 // than a round_up. For millis less than our roundfactor
5433 // it rounded down to 0 which doesn't meet the spec.
5434 // For millis > roundfactor we may return a bit sooner, but
5435 // since we can not accurately identify the patch level and
5436 // this has already been fixed in Solaris 9 and 8 we will
5437 // leave it alone rather than always rounding down.
5438
5439 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5440 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5441 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5442 max_wait_period = 21000000;
5443 } else {
5444 max_wait_period = 50000000;
5445 }
5446 millis %= 1000;
5447 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5448 seconds = max_wait_period;
5449 }
5450 abstime->tv_sec = now.tv_sec + seconds;
5451 long usec = now.tv_usec + millis * 1000;
5452 if (usec >= 1000000) {
5453 abstime->tv_sec += 1;
5454 usec -= 1000000;
5455 }
5456 abstime->tv_nsec = usec * 1000;
5457 return abstime;
5458 }
5459
5460 void os::PlatformEvent::park() { // AKA: down()
5461 // Transitions for _Event:
5462 // -1 => -1 : illegal
5463 // 1 => 0 : pass - return immediately
5464 // 0 => -1 : block; then set _Event to 0 before returning
5465
5466 // Invariant: Only the thread associated with the Event/PlatformEvent
5467 // may call park().
5468 assert(_nParked == 0, "invariant");
5469
5470 int v;
5471 for (;;) {
5472 v = _Event;
5473 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5474 }
5475 guarantee(v >= 0, "invariant");
5476 if (v == 0) {
5477 // Do this the hard way by blocking ...
5478 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5479 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5480 // Only for SPARC >= V8PlusA
5481 #if defined(__sparc) && defined(COMPILER2)
5482 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5483 #endif
5484 int status = os::Solaris::mutex_lock(_mutex);
5485 assert_status(status == 0, status, "mutex_lock");
5486 guarantee(_nParked == 0, "invariant");
5487 ++_nParked;
5488 while (_Event < 0) {
5489 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5490 // Treat this the same as if the wait was interrupted
5491 // With usr/lib/lwp going to kernel, always handle ETIME
5492 status = os::Solaris::cond_wait(_cond, _mutex);
5493 if (status == ETIME) status = EINTR;
5494 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5495 }
5496 --_nParked;
5497 _Event = 0;
5498 status = os::Solaris::mutex_unlock(_mutex);
5499 assert_status(status == 0, status, "mutex_unlock");
5500 // Paranoia to ensure our locked and lock-free paths interact
5501 // correctly with each other.
5502 OrderAccess::fence();
5503 }
5504 }
5505
5506 int os::PlatformEvent::park(jlong millis) {
5507 // Transitions for _Event:
5508 // -1 => -1 : illegal
5509 // 1 => 0 : pass - return immediately
5510 // 0 => -1 : block; then set _Event to 0 before returning
5511
5512 guarantee(_nParked == 0, "invariant");
5513 int v;
5514 for (;;) {
5515 v = _Event;
5516 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5517 }
5518 guarantee(v >= 0, "invariant");
5519 if (v != 0) return OS_OK;
5520
5521 int ret = OS_TIMEOUT;
5522 timestruc_t abst;
5523 compute_abstime(&abst, millis);
5524
5525 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5526 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5527 // Only for SPARC >= V8PlusA
5528 #if defined(__sparc) && defined(COMPILER2)
5529 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5530 #endif
5531 int status = os::Solaris::mutex_lock(_mutex);
5532 assert_status(status == 0, status, "mutex_lock");
5533 guarantee(_nParked == 0, "invariant");
5534 ++_nParked;
5535 while (_Event < 0) {
5536 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5537 assert_status(status == 0 || status == EINTR ||
5538 status == ETIME || status == ETIMEDOUT,
5539 status, "cond_timedwait");
5540 if (!FilterSpuriousWakeups) break; // previous semantics
5541 if (status == ETIME || status == ETIMEDOUT) break;
5542 // We consume and ignore EINTR and spurious wakeups.
5543 }
5544 --_nParked;
5545 if (_Event >= 0) ret = OS_OK;
5546 _Event = 0;
5547 status = os::Solaris::mutex_unlock(_mutex);
5548 assert_status(status == 0, status, "mutex_unlock");
5549 // Paranoia to ensure our locked and lock-free paths interact
5550 // correctly with each other.
5551 OrderAccess::fence();
5552 return ret;
5553 }
5554
5555 void os::PlatformEvent::unpark() {
5556 // Transitions for _Event:
5557 // 0 => 1 : just return
5558 // 1 => 1 : just return
5559 // -1 => either 0 or 1; must signal target thread
5560 // That is, we can safely transition _Event from -1 to either
5561 // 0 or 1.
5562 // See also: "Semaphores in Plan 9" by Mullender & Cox
5563 //
5564 // Note: Forcing a transition from "-1" to "1" on an unpark() means
5565 // that it will take two back-to-back park() calls for the owning
5566 // thread to block. This has the benefit of forcing a spurious return
5567 // from the first park() call after an unpark() call which will help
5568 // shake out uses of park() and unpark() without condition variables.
5569
5570 if (Atomic::xchg(1, &_Event) >= 0) return;
5571
5572 // If the thread associated with the event was parked, wake it.
5573 // Wait for the thread assoc with the PlatformEvent to vacate.
5574 int status = os::Solaris::mutex_lock(_mutex);
5575 assert_status(status == 0, status, "mutex_lock");
5576 int AnyWaiters = _nParked;
5577 status = os::Solaris::mutex_unlock(_mutex);
5578 assert_status(status == 0, status, "mutex_unlock");
5579 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
5580 if (AnyWaiters != 0) {
5581 // Note that we signal() *after* dropping the lock for "immortal" Events.
5582 // This is safe and avoids a common class of futile wakeups. In rare
5583 // circumstances this can cause a thread to return prematurely from
5584 // cond_{timed}wait() but the spurious wakeup is benign and the victim
5585 // will simply re-test the condition and re-park itself.
5586 // This provides particular benefit if the underlying platform does not
5587 // provide wait morphing.
5588 status = os::Solaris::cond_signal(_cond);
5589 assert_status(status == 0, status, "cond_signal");
5590 }
5591 }
5592
5593 // JSR166
5594 // -------------------------------------------------------
5595
5596 // The solaris and linux implementations of park/unpark are fairly
5597 // conservative for now, but can be improved. They currently use a
5598 // mutex/condvar pair, plus _counter.
5599 // Park decrements _counter if > 0, else does a condvar wait. Unpark
5600 // sets count to 1 and signals condvar. Only one thread ever waits
5601 // on the condvar. Contention seen when trying to park implies that someone
5602 // is unparking you, so don't wait. And spurious returns are fine, so there
5603 // is no need to track notifications.
5604
5605 #define MAX_SECS 100000000
5606
5607 // This code is common to linux and solaris and will be moved to a
5608 // common place in dolphin.
5609 //
5610 // The passed in time value is either a relative time in nanoseconds
5611 // or an absolute time in milliseconds. Either way it has to be unpacked
5612 // into suitable seconds and nanoseconds components and stored in the
5613 // given timespec structure.
5614 // Given time is a 64-bit value and the time_t used in the timespec is only
5615 // a signed-32-bit value (except on 64-bit Linux) we have to watch for
5616 // overflow if times way in the future are given. Further on Solaris versions
5617 // prior to 10 there is a restriction (see cond_timedwait) that the specified
5618 // number of seconds, in abstime, is less than current_time + 100,000,000.
5619 // As it will be 28 years before "now + 100000000" will overflow we can
5620 // ignore overflow and just impose a hard-limit on seconds using the value
5621 // of "now + 100,000,000". This places a limit on the timeout of about 3.17
5622 // years from "now".
5623 //
5624 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5625 assert(time > 0, "convertTime");
5626
5627 struct timeval now;
5628 int status = gettimeofday(&now, NULL);
5629 assert(status == 0, "gettimeofday");
5630
5631 time_t max_secs = now.tv_sec + MAX_SECS;
5632
5633 if (isAbsolute) {
5634 jlong secs = time / 1000;
5635 if (secs > max_secs) {
5636 absTime->tv_sec = max_secs;
5637 } else {
5638 absTime->tv_sec = secs;
5639 }
5640 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5641 } else {
5642 jlong secs = time / NANOSECS_PER_SEC;
5643 if (secs >= MAX_SECS) {
5644 absTime->tv_sec = max_secs;
5645 absTime->tv_nsec = 0;
5646 } else {
5647 absTime->tv_sec = now.tv_sec + secs;
5648 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5649 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5650 absTime->tv_nsec -= NANOSECS_PER_SEC;
5651 ++absTime->tv_sec; // note: this must be <= max_secs
5652 }
5653 }
5654 }
5655 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5656 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5657 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5658 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5659 }
5660
5661 void Parker::park(bool isAbsolute, jlong time) {
5662 // Ideally we'd do something useful while spinning, such
5663 // as calling unpackTime().
5664
5665 // Optional fast-path check:
5666 // Return immediately if a permit is available.
5667 // We depend on Atomic::xchg() having full barrier semantics
5668 // since we are doing a lock-free update to _counter.
5669 if (Atomic::xchg(0, &_counter) > 0) return;
5670
5671 // Optional fast-exit: Check interrupt before trying to wait
5672 Thread* thread = Thread::current();
5673 assert(thread->is_Java_thread(), "Must be JavaThread");
5674 JavaThread *jt = (JavaThread *)thread;
5675 if (Thread::is_interrupted(thread, false)) {
5676 return;
5677 }
5678
5679 // First, demultiplex/decode time arguments
5680 timespec absTime;
5681 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all
5682 return;
5683 }
5684 if (time > 0) {
5685 // Warning: this code might be exposed to the old Solaris time
5686 // round-down bugs. Grep "roundingFix" for details.
5687 unpackTime(&absTime, isAbsolute, time);
5688 }
5689
5690 // Enter safepoint region
5691 // Beware of deadlocks such as 6317397.
5692 // The per-thread Parker:: _mutex is a classic leaf-lock.
5693 // In particular a thread must never block on the Threads_lock while
5694 // holding the Parker:: mutex. If safepoints are pending both the
5695 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
5696 ThreadBlockInVM tbivm(jt);
5697
5698 // Don't wait if cannot get lock since interference arises from
5699 // unblocking. Also. check interrupt before trying wait
5700 if (Thread::is_interrupted(thread, false) ||
5701 os::Solaris::mutex_trylock(_mutex) != 0) {
5702 return;
5703 }
5704
5705 int status;
5706
5707 if (_counter > 0) { // no wait needed
5708 _counter = 0;
5709 status = os::Solaris::mutex_unlock(_mutex);
5710 assert(status == 0, "invariant");
5711 // Paranoia to ensure our locked and lock-free paths interact
5712 // correctly with each other and Java-level accesses.
5713 OrderAccess::fence();
5714 return;
5715 }
5716
5717 #ifdef ASSERT
5718 // Don't catch signals while blocked; let the running threads have the signals.
5719 // (This allows a debugger to break into the running thread.)
5720 sigset_t oldsigs;
5721 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
5722 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
5723 #endif
5724
5725 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
5726 jt->set_suspend_equivalent();
5727 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
5728
5729 // Do this the hard way by blocking ...
5730 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5731 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5732 // Only for SPARC >= V8PlusA
5733 #if defined(__sparc) && defined(COMPILER2)
5734 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5735 #endif
5736
5737 if (time == 0) {
5738 status = os::Solaris::cond_wait(_cond, _mutex);
5739 } else {
5740 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
5741 }
5742 // Note that an untimed cond_wait() can sometimes return ETIME on older
5743 // versions of the Solaris.
5744 assert_status(status == 0 || status == EINTR ||
5745 status == ETIME || status == ETIMEDOUT,
5746 status, "cond_timedwait");
5747
5748 #ifdef ASSERT
5749 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
5750 #endif
5751 _counter = 0;
5752 status = os::Solaris::mutex_unlock(_mutex);
5753 assert_status(status == 0, status, "mutex_unlock");
5754 // Paranoia to ensure our locked and lock-free paths interact
5755 // correctly with each other and Java-level accesses.
5756 OrderAccess::fence();
5757
5758 // If externally suspended while waiting, re-suspend
5759 if (jt->handle_special_suspend_equivalent_condition()) {
5760 jt->java_suspend_self();
5761 }
5762 }
5763
5764 void Parker::unpark() {
5765 int status = os::Solaris::mutex_lock(_mutex);
5766 assert(status == 0, "invariant");
5767 const int s = _counter;
5768 _counter = 1;
5769 status = os::Solaris::mutex_unlock(_mutex);
5770 assert(status == 0, "invariant");
5771
5772 if (s < 1) {
5773 status = os::Solaris::cond_signal(_cond);
5774 assert(status == 0, "invariant");
5775 }
5776 }
5777
5778 extern char** environ;
5779
5780 // Run the specified command in a separate process. Return its exit value,
5781 // or -1 on failure (e.g. can't fork a new process).
5782 // Unlike system(), this function can be called from signal handler. It
5783 // doesn't block SIGINT et al.
5784 int os::fork_and_exec(char* cmd) {
5785 char * argv[4];
5786 argv[0] = (char *)"sh";
5787 argv[1] = (char *)"-c";
5788 argv[2] = cmd;
5789 argv[3] = NULL;
5790
5791 // fork is async-safe, fork1 is not so can't use in signal handler
5792 pid_t pid;
5793 Thread* t = ThreadLocalStorage::get_thread_slow();
5794 if (t != NULL && t->is_inside_signal_handler()) {
5795 pid = fork();
5796 } else {
5797 pid = fork1();
5798 }
5799
5800 if (pid < 0) {
5801 // fork failed
5802 warning("fork failed: %s", strerror(errno));
5803 return -1;
5804
5805 } else if (pid == 0) {
5806 // child process
5807
5808 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
5809 execve("/usr/bin/sh", argv, environ);
5810
5811 // execve failed
5812 _exit(-1);
5813
5814 } else {
5815 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5816 // care about the actual exit code, for now.
5817
5818 int status;
5819
5820 // Wait for the child process to exit. This returns immediately if
5821 // the child has already exited. */
5822 while (waitpid(pid, &status, 0) < 0) {
5823 switch (errno) {
5824 case ECHILD: return 0;
5825 case EINTR: break;
5826 default: return -1;
5827 }
5828 }
5829
5830 if (WIFEXITED(status)) {
5831 // The child exited normally; get its exit code.
5832 return WEXITSTATUS(status);
5833 } else if (WIFSIGNALED(status)) {
5834 // The child exited because of a signal
5835 // The best value to return is 0x80 + signal number,
5836 // because that is what all Unix shells do, and because
5837 // it allows callers to distinguish between process exit and
5838 // process death by signal.
5839 return 0x80 + WTERMSIG(status);
5840 } else {
5841 // Unknown exit code; pass it through
5842 return status;
5843 }
5844 }
5845 }
5846
5847 // is_headless_jre()
5848 //
5849 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
5850 // in order to report if we are running in a headless jre
5851 //
5852 // Since JDK8 xawt/libmawt.so was moved into the same directory
5853 // as libawt.so, and renamed libawt_xawt.so
5854 //
5855 bool os::is_headless_jre() {
5856 struct stat statbuf;
5857 char buf[MAXPATHLEN];
5858 char libmawtpath[MAXPATHLEN];
5859 const char *xawtstr = "/xawt/libmawt.so";
5860 const char *new_xawtstr = "/libawt_xawt.so";
5861 char *p;
5862
5863 // Get path to libjvm.so
5864 os::jvm_path(buf, sizeof(buf));
5865
5866 // Get rid of libjvm.so
5867 p = strrchr(buf, '/');
5868 if (p == NULL) {
5869 return false;
5870 } else {
5871 *p = '\0';
5872 }
5873
5874 // Get rid of client or server
5875 p = strrchr(buf, '/');
5876 if (p == NULL) {
5877 return false;
5878 } else {
5879 *p = '\0';
5880 }
5881
5882 // check xawt/libmawt.so
5883 strcpy(libmawtpath, buf);
5884 strcat(libmawtpath, xawtstr);
5885 if (::stat(libmawtpath, &statbuf) == 0) return false;
5886
5887 // check libawt_xawt.so
5888 strcpy(libmawtpath, buf);
5889 strcat(libmawtpath, new_xawtstr);
5890 if (::stat(libmawtpath, &statbuf) == 0) return false;
5891
5892 return true;
5893 }
5894
5895 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
5896 size_t res;
5897 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5898 "Assumed _thread_in_native");
5899 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
5900 return res;
5901 }
5902
5903 int os::close(int fd) {
5904 return ::close(fd);
5905 }
5906
5907 int os::socket_close(int fd) {
5908 return ::close(fd);
5909 }
5910
5911 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
5912 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5913 "Assumed _thread_in_native");
5914 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags));
5915 }
5916
5917 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
5918 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5919 "Assumed _thread_in_native");
5920 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5921 }
5922
5923 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
5924 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5925 }
5926
5927 // As both poll and select can be interrupted by signals, we have to be
5928 // prepared to restart the system call after updating the timeout, unless
5929 // a poll() is done with timeout == -1, in which case we repeat with this
5930 // "wait forever" value.
5931
5932 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
5933 int _result;
5934 _result = ::connect(fd, him, len);
5935
5936 // On Solaris, when a connect() call is interrupted, the connection
5937 // can be established asynchronously (see 6343810). Subsequent calls
5938 // to connect() must check the errno value which has the semantic
5939 // described below (copied from the connect() man page). Handling
5940 // of asynchronously established connections is required for both
5941 // blocking and non-blocking sockets.
5942 // EINTR The connection attempt was interrupted
5943 // before any data arrived by the delivery of
5944 // a signal. The connection, however, will be
5945 // established asynchronously.
5946 //
5947 // EINPROGRESS The socket is non-blocking, and the connec-
5948 // tion cannot be completed immediately.
5949 //
5950 // EALREADY The socket is non-blocking, and a previous
5951 // connection attempt has not yet been com-
5952 // pleted.
5953 //
5954 // EISCONN The socket is already connected.
5955 if (_result == OS_ERR && errno == EINTR) {
5956 // restarting a connect() changes its errno semantics
5957 RESTARTABLE(::connect(fd, him, len), _result);
5958 // undo these changes
5959 if (_result == OS_ERR) {
5960 if (errno == EALREADY) {
5961 errno = EINPROGRESS; // fall through
5962 } else if (errno == EISCONN) {
5963 errno = 0;
5964 return OS_OK;
5965 }
5966 }
5967 }
5968 return _result;
5969 }
5970
5971 // Get the default path to the core file
5972 // Returns the length of the string
5973 int os::get_core_path(char* buffer, size_t bufferSize) {
5974 const char* p = get_current_directory(buffer, bufferSize);
5975
5976 if (p == NULL) {
5977 assert(p != NULL, "failed to get current directory");
5978 return 0;
5979 }
5980
5981 jio_snprintf(buffer, bufferSize, "%s/core or core.%d",
5982 p, current_process_id());
5983
5984 return strlen(buffer);
5985 }
5986
5987 #ifndef PRODUCT
5988 void TestReserveMemorySpecial_test() {
5989 // No tests available for this platform
5990 }
5991 #endif