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/semaphore.hpp"
71 #include "utilities/vmError.hpp"
72
73 // put OS-includes here
74 # include <dlfcn.h>
75 # include <errno.h>
76 # include <exception>
77 # include <link.h>
78 # include <poll.h>
79 # include <pthread.h>
80 # include <pwd.h>
81 # include <schedctl.h>
82 # include <setjmp.h>
83 # include <signal.h>
84 # include <stdio.h>
85 # include <alloca.h>
86 # include <sys/filio.h>
87 # include <sys/ipc.h>
88 # include <sys/lwp.h>
89 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
90 # include <sys/mman.h>
91 # include <sys/processor.h>
92 # include <sys/procset.h>
93 # include <sys/pset.h>
94 # include <sys/resource.h>
95 # include <sys/shm.h>
96 # include <sys/socket.h>
97 # include <sys/stat.h>
98 # include <sys/systeminfo.h>
99 # include <sys/time.h>
100 # include <sys/times.h>
101 # include <sys/types.h>
102 # include <sys/wait.h>
103 # include <sys/utsname.h>
104 # include <thread.h>
105 # include <unistd.h>
106 # include <sys/priocntl.h>
107 # include <sys/rtpriocntl.h>
108 # include <sys/tspriocntl.h>
109 # include <sys/iapriocntl.h>
110 # include <sys/fxpriocntl.h>
111 # include <sys/loadavg.h>
112 # include <string.h>
113 # include <stdio.h>
114
115 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
116 # include <sys/procfs.h> // see comment in <sys/procfs.h>
117
118 #define MAX_PATH (2 * K)
119
120 // for timer info max values which include all bits
121 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
122
123
124 // Here are some liblgrp types from sys/lgrp_user.h to be able to
125 // compile on older systems without this header file.
126
127 #ifndef MADV_ACCESS_LWP
128 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
129 #endif
130 #ifndef MADV_ACCESS_MANY
131 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */
132 #endif
133
134 #ifndef LGRP_RSRC_CPU
135 #define LGRP_RSRC_CPU 0 /* CPU resources */
136 #endif
137 #ifndef LGRP_RSRC_MEM
138 #define LGRP_RSRC_MEM 1 /* memory resources */
139 #endif
140
141 // see thr_setprio(3T) for the basis of these numbers
142 #define MinimumPriority 0
143 #define NormalPriority 64
144 #define MaximumPriority 127
145
146 // Values for ThreadPriorityPolicy == 1
147 int prio_policy1[CriticalPriority+1] = {
148 -99999, 0, 16, 32, 48, 64,
149 80, 96, 112, 124, 127, 127 };
150
151 // System parameters used internally
152 static clock_t clock_tics_per_sec = 100;
153
154 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
155 static bool enabled_extended_FILE_stdio = false;
156
157 // For diagnostics to print a message once. see run_periodic_checks
158 static bool check_addr0_done = false;
159 static sigset_t check_signal_done;
160 static bool check_signals = true;
161
162 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
163 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
164
165 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
166
167
168 // "default" initializers for missing libc APIs
169 extern "C" {
170 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
171 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
172
173 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
174 static int lwp_cond_destroy(cond_t *cv) { return 0; }
175 }
176
177 // "default" initializers for pthread-based synchronization
178 extern "C" {
179 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
180 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
181 }
182
183 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time);
184
185 // Thread Local Storage
186 // This is common to all Solaris platforms so it is defined here,
187 // in this common file.
188 // The declarations are in the os_cpu threadLS*.hpp files.
189 //
190 // Static member initialization for TLS
191 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
192
193 #ifndef PRODUCT
194 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
195
196 int ThreadLocalStorage::_tcacheHit = 0;
197 int ThreadLocalStorage::_tcacheMiss = 0;
198
199 void ThreadLocalStorage::print_statistics() {
200 int total = _tcacheMiss+_tcacheHit;
201 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
202 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
203 }
204 #undef _PCT
205 #endif // PRODUCT
206
207 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
208 int index) {
209 Thread *thread = get_thread_slow();
210 if (thread != NULL) {
211 address sp = os::current_stack_pointer();
212 guarantee(thread->_stack_base == NULL ||
213 (sp <= thread->_stack_base &&
214 sp >= thread->_stack_base - thread->_stack_size) ||
215 is_error_reported(),
216 "sp must be inside of selected thread stack");
217
218 thread->set_self_raw_id(raw_id); // mark for quick retrieval
219 _get_thread_cache[index] = thread;
220 }
221 return thread;
222 }
223
224
225 static const double all_zero[sizeof(Thread) / sizeof(double) + 1] = {0};
226 #define NO_CACHED_THREAD ((Thread*)all_zero)
227
228 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
229
230 // Store the new value before updating the cache to prevent a race
231 // between get_thread_via_cache_slowly() and this store operation.
232 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
233
234 // Update thread cache with new thread if setting on thread create,
235 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
236 uintptr_t raw = pd_raw_thread_id();
237 int ix = pd_cache_index(raw);
238 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
239 }
240
241 void ThreadLocalStorage::pd_init() {
242 for (int i = 0; i < _pd_cache_size; i++) {
243 _get_thread_cache[i] = NO_CACHED_THREAD;
244 }
245 }
246
247 // Invalidate all the caches (happens to be the same as pd_init).
248 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
249
250 #undef NO_CACHED_THREAD
251
252 // END Thread Local Storage
253
254 static inline size_t adjust_stack_size(address base, size_t size) {
255 if ((ssize_t)size < 0) {
256 // 4759953: Compensate for ridiculous stack size.
257 size = max_intx;
258 }
259 if (size > (size_t)base) {
260 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
261 size = (size_t)base;
262 }
263 return size;
264 }
265
266 static inline stack_t get_stack_info() {
267 stack_t st;
268 int retval = thr_stksegment(&st);
269 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
270 assert(retval == 0, "incorrect return value from thr_stksegment");
271 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
272 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
273 return st;
274 }
275
276 address os::current_stack_base() {
277 int r = thr_main();
278 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
279 bool is_primordial_thread = r;
280
281 // Workaround 4352906, avoid calls to thr_stksegment by
282 // thr_main after the first one (it looks like we trash
283 // some data, causing the value for ss_sp to be incorrect).
284 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
285 stack_t st = get_stack_info();
286 if (is_primordial_thread) {
287 // cache initial value of stack base
288 os::Solaris::_main_stack_base = (address)st.ss_sp;
289 }
290 return (address)st.ss_sp;
291 } else {
292 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
293 return os::Solaris::_main_stack_base;
294 }
295 }
296
297 size_t os::current_stack_size() {
298 size_t size;
299
300 int r = thr_main();
301 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
302 if (!r) {
303 size = get_stack_info().ss_size;
304 } else {
305 struct rlimit limits;
306 getrlimit(RLIMIT_STACK, &limits);
307 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
308 }
309 // base may not be page aligned
310 address base = current_stack_base();
311 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
312 return (size_t)(base - bottom);
313 }
314
315 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
316 return localtime_r(clock, res);
317 }
318
319 void os::Solaris::try_enable_extended_io() {
320 typedef int (*enable_extended_FILE_stdio_t)(int, int);
321
322 if (!UseExtendedFileIO) {
323 return;
324 }
325
326 enable_extended_FILE_stdio_t enabler =
327 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
328 "enable_extended_FILE_stdio");
329 if (enabler) {
330 enabler(-1, -1);
331 }
332 }
333
334 static int _processors_online = 0;
335
336 jint os::Solaris::_os_thread_limit = 0;
337 volatile jint os::Solaris::_os_thread_count = 0;
338
339 julong os::available_memory() {
340 return Solaris::available_memory();
341 }
342
343 julong os::Solaris::available_memory() {
344 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
345 }
346
347 julong os::Solaris::_physical_memory = 0;
348
349 julong os::physical_memory() {
350 return Solaris::physical_memory();
351 }
352
353 static hrtime_t first_hrtime = 0;
354 static const hrtime_t hrtime_hz = 1000*1000*1000;
355 static volatile hrtime_t max_hrtime = 0;
356
357
358 void os::Solaris::initialize_system_info() {
359 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
360 _processors_online = sysconf(_SC_NPROCESSORS_ONLN);
361 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) *
362 (julong)sysconf(_SC_PAGESIZE);
363 }
364
365 int os::active_processor_count() {
366 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
367 pid_t pid = getpid();
368 psetid_t pset = PS_NONE;
369 // Are we running in a processor set or is there any processor set around?
370 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
371 uint_t pset_cpus;
372 // Query the number of cpus available to us.
373 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
374 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
375 _processors_online = pset_cpus;
376 return pset_cpus;
377 }
378 }
379 // Otherwise return number of online cpus
380 return online_cpus;
381 }
382
383 static bool find_processors_in_pset(psetid_t pset,
384 processorid_t** id_array,
385 uint_t* id_length) {
386 bool result = false;
387 // Find the number of processors in the processor set.
388 if (pset_info(pset, NULL, id_length, NULL) == 0) {
389 // Make up an array to hold their ids.
390 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
391 // Fill in the array with their processor ids.
392 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
393 result = true;
394 }
395 }
396 return result;
397 }
398
399 // Callers of find_processors_online() must tolerate imprecise results --
400 // the system configuration can change asynchronously because of DR
401 // or explicit psradm operations.
402 //
403 // We also need to take care that the loop (below) terminates as the
404 // number of processors online can change between the _SC_NPROCESSORS_ONLN
405 // request and the loop that builds the list of processor ids. Unfortunately
406 // there's no reliable way to determine the maximum valid processor id,
407 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
408 // man pages, which claim the processor id set is "sparse, but
409 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
410 // exit the loop.
411 //
412 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
413 // not available on S8.0.
414
415 static bool find_processors_online(processorid_t** id_array,
416 uint* id_length) {
417 const processorid_t MAX_PROCESSOR_ID = 100000;
418 // Find the number of processors online.
419 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
420 // Make up an array to hold their ids.
421 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
422 // Processors need not be numbered consecutively.
423 long found = 0;
424 processorid_t next = 0;
425 while (found < *id_length && next < MAX_PROCESSOR_ID) {
426 processor_info_t info;
427 if (processor_info(next, &info) == 0) {
428 // NB, PI_NOINTR processors are effectively online ...
429 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
430 (*id_array)[found] = next;
431 found += 1;
432 }
433 }
434 next += 1;
435 }
436 if (found < *id_length) {
437 // The loop above didn't identify the expected number of processors.
438 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
439 // and re-running the loop, above, but there's no guarantee of progress
440 // if the system configuration is in flux. Instead, we just return what
441 // we've got. Note that in the worst case find_processors_online() could
442 // return an empty set. (As a fall-back in the case of the empty set we
443 // could just return the ID of the current processor).
444 *id_length = found;
445 }
446
447 return true;
448 }
449
450 static bool assign_distribution(processorid_t* id_array,
451 uint id_length,
452 uint* distribution,
453 uint distribution_length) {
454 // We assume we can assign processorid_t's to uint's.
455 assert(sizeof(processorid_t) == sizeof(uint),
456 "can't convert processorid_t to uint");
457 // Quick check to see if we won't succeed.
458 if (id_length < distribution_length) {
459 return false;
460 }
461 // Assign processor ids to the distribution.
462 // Try to shuffle processors to distribute work across boards,
463 // assuming 4 processors per board.
464 const uint processors_per_board = ProcessDistributionStride;
465 // Find the maximum processor id.
466 processorid_t max_id = 0;
467 for (uint m = 0; m < id_length; m += 1) {
468 max_id = MAX2(max_id, id_array[m]);
469 }
470 // The next id, to limit loops.
471 const processorid_t limit_id = max_id + 1;
472 // Make up markers for available processors.
473 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
474 for (uint c = 0; c < limit_id; c += 1) {
475 available_id[c] = false;
476 }
477 for (uint a = 0; a < id_length; a += 1) {
478 available_id[id_array[a]] = true;
479 }
480 // Step by "boards", then by "slot", copying to "assigned".
481 // NEEDS_CLEANUP: The assignment of processors should be stateful,
482 // remembering which processors have been assigned by
483 // previous calls, etc., so as to distribute several
484 // independent calls of this method. What we'd like is
485 // It would be nice to have an API that let us ask
486 // how many processes are bound to a processor,
487 // but we don't have that, either.
488 // In the short term, "board" is static so that
489 // subsequent distributions don't all start at board 0.
490 static uint board = 0;
491 uint assigned = 0;
492 // Until we've found enough processors ....
493 while (assigned < distribution_length) {
494 // ... find the next available processor in the board.
495 for (uint slot = 0; slot < processors_per_board; slot += 1) {
496 uint try_id = board * processors_per_board + slot;
497 if ((try_id < limit_id) && (available_id[try_id] == true)) {
498 distribution[assigned] = try_id;
499 available_id[try_id] = false;
500 assigned += 1;
501 break;
502 }
503 }
504 board += 1;
505 if (board * processors_per_board + 0 >= limit_id) {
506 board = 0;
507 }
508 }
509 if (available_id != NULL) {
510 FREE_C_HEAP_ARRAY(bool, available_id);
511 }
512 return true;
513 }
514
515 void os::set_native_thread_name(const char *name) {
516 // Not yet implemented.
517 return;
518 }
519
520 bool os::distribute_processes(uint length, uint* distribution) {
521 bool result = false;
522 // Find the processor id's of all the available CPUs.
523 processorid_t* id_array = NULL;
524 uint id_length = 0;
525 // There are some races between querying information and using it,
526 // since processor sets can change dynamically.
527 psetid_t pset = PS_NONE;
528 // Are we running in a processor set?
529 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
530 result = find_processors_in_pset(pset, &id_array, &id_length);
531 } else {
532 result = find_processors_online(&id_array, &id_length);
533 }
534 if (result == true) {
535 if (id_length >= length) {
536 result = assign_distribution(id_array, id_length, distribution, length);
537 } else {
538 result = false;
539 }
540 }
541 if (id_array != NULL) {
542 FREE_C_HEAP_ARRAY(processorid_t, id_array);
543 }
544 return result;
545 }
546
547 bool os::bind_to_processor(uint processor_id) {
548 // We assume that a processorid_t can be stored in a uint.
549 assert(sizeof(uint) == sizeof(processorid_t),
550 "can't convert uint to processorid_t");
551 int bind_result =
552 processor_bind(P_LWPID, // bind LWP.
553 P_MYID, // bind current LWP.
554 (processorid_t) processor_id, // id.
555 NULL); // don't return old binding.
556 return (bind_result == 0);
557 }
558
559 // Return true if user is running as root.
560
561 bool os::have_special_privileges() {
562 static bool init = false;
563 static bool privileges = false;
564 if (!init) {
565 privileges = (getuid() != geteuid()) || (getgid() != getegid());
566 init = true;
567 }
568 return privileges;
569 }
570
571
572 void os::init_system_properties_values() {
573 // The next steps are taken in the product version:
574 //
575 // Obtain the JAVA_HOME value from the location of libjvm.so.
576 // This library should be located at:
577 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so.
578 //
579 // If "/jre/lib/" appears at the right place in the path, then we
580 // assume libjvm.so is installed in a JDK and we use this path.
581 //
582 // Otherwise exit with message: "Could not create the Java virtual machine."
583 //
584 // The following extra steps are taken in the debugging version:
585 //
586 // If "/jre/lib/" does NOT appear at the right place in the path
587 // instead of exit check for $JAVA_HOME environment variable.
588 //
589 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
590 // then we append a fake suffix "hotspot/libjvm.so" to this path so
591 // it looks like libjvm.so is installed there
592 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so.
593 //
594 // Otherwise exit.
595 //
596 // Important note: if the location of libjvm.so changes this
597 // code needs to be changed accordingly.
598
599 // Base path of extensions installed on the system.
600 #define SYS_EXT_DIR "/usr/jdk/packages"
601 #define EXTENSIONS_DIR "/lib/ext"
602
603 char cpu_arch[12];
604 // Buffer that fits several sprintfs.
605 // Note that the space for the colon and the trailing null are provided
606 // by the nulls included by the sizeof operator.
607 const size_t bufsize =
608 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends.
609 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path
610 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir
611 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal);
612
613 // sysclasspath, java_home, dll_dir
614 {
615 char *pslash;
616 os::jvm_path(buf, bufsize);
617
618 // Found the full path to libjvm.so.
619 // Now cut the path to <java_home>/jre if we can.
620 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so.
621 pslash = strrchr(buf, '/');
622 if (pslash != NULL) {
623 *pslash = '\0'; // Get rid of /{client|server|hotspot}.
624 }
625 Arguments::set_dll_dir(buf);
626
627 if (pslash != NULL) {
628 pslash = strrchr(buf, '/');
629 if (pslash != NULL) {
630 *pslash = '\0'; // Get rid of /<arch>.
631 pslash = strrchr(buf, '/');
632 if (pslash != NULL) {
633 *pslash = '\0'; // Get rid of /lib.
634 }
635 }
636 }
637 Arguments::set_java_home(buf);
638 set_boot_path('/', ':');
639 }
640
641 // Where to look for native libraries.
642 {
643 // Use dlinfo() to determine the correct java.library.path.
644 //
645 // If we're launched by the Java launcher, and the user
646 // does not set java.library.path explicitly on the commandline,
647 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
648 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
649 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
650 // /usr/lib), which is exactly what we want.
651 //
652 // If the user does set java.library.path, it completely
653 // overwrites this setting, and always has.
654 //
655 // If we're not launched by the Java launcher, we may
656 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
657 // settings. Again, dlinfo does exactly what we want.
658
659 Dl_serinfo info_sz, *info = &info_sz;
660 Dl_serpath *path;
661 char *library_path;
662 char *common_path = buf;
663
664 // Determine search path count and required buffer size.
665 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
666 FREE_C_HEAP_ARRAY(char, buf);
667 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
668 }
669
670 // Allocate new buffer and initialize.
671 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal);
672 info->dls_size = info_sz.dls_size;
673 info->dls_cnt = info_sz.dls_cnt;
674
675 // Obtain search path information.
676 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
677 FREE_C_HEAP_ARRAY(char, buf);
678 FREE_C_HEAP_ARRAY(char, info);
679 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
680 }
681
682 path = &info->dls_serpath[0];
683
684 // Note: Due to a legacy implementation, most of the library path
685 // is set in the launcher. This was to accomodate linking restrictions
686 // on legacy Solaris implementations (which are no longer supported).
687 // Eventually, all the library path setting will be done here.
688 //
689 // However, to prevent the proliferation of improperly built native
690 // libraries, the new path component /usr/jdk/packages is added here.
691
692 // Determine the actual CPU architecture.
693 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
694 #ifdef _LP64
695 // If we are a 64-bit vm, perform the following translations:
696 // sparc -> sparcv9
697 // i386 -> amd64
698 if (strcmp(cpu_arch, "sparc") == 0) {
699 strcat(cpu_arch, "v9");
700 } else if (strcmp(cpu_arch, "i386") == 0) {
701 strcpy(cpu_arch, "amd64");
702 }
703 #endif
704
705 // Construct the invariant part of ld_library_path.
706 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch);
707
708 // Struct size is more than sufficient for the path components obtained
709 // through the dlinfo() call, so only add additional space for the path
710 // components explicitly added here.
711 size_t library_path_size = info->dls_size + strlen(common_path);
712 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal);
713 library_path[0] = '\0';
714
715 // Construct the desired Java library path from the linker's library
716 // search path.
717 //
718 // For compatibility, it is optimal that we insert the additional path
719 // components specific to the Java VM after those components specified
720 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
721 // infrastructure.
722 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it.
723 strcpy(library_path, common_path);
724 } else {
725 int inserted = 0;
726 int i;
727 for (i = 0; i < info->dls_cnt; i++, path++) {
728 uint_t flags = path->dls_flags & LA_SER_MASK;
729 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
730 strcat(library_path, common_path);
731 strcat(library_path, os::path_separator());
732 inserted = 1;
733 }
734 strcat(library_path, path->dls_name);
735 strcat(library_path, os::path_separator());
736 }
737 // Eliminate trailing path separator.
738 library_path[strlen(library_path)-1] = '\0';
739 }
740
741 // happens before argument parsing - can't use a trace flag
742 // tty->print_raw("init_system_properties_values: native lib path: ");
743 // tty->print_raw_cr(library_path);
744
745 // Callee copies into its own buffer.
746 Arguments::set_library_path(library_path);
747
748 FREE_C_HEAP_ARRAY(char, library_path);
749 FREE_C_HEAP_ARRAY(char, info);
750 }
751
752 // Extensions directories.
753 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home());
754 Arguments::set_ext_dirs(buf);
755
756 FREE_C_HEAP_ARRAY(char, buf);
757
758 #undef SYS_EXT_DIR
759 #undef EXTENSIONS_DIR
760 }
761
762 void os::breakpoint() {
763 BREAKPOINT;
764 }
765
766 bool os::obsolete_option(const JavaVMOption *option) {
767 if (!strncmp(option->optionString, "-Xt", 3)) {
768 return true;
769 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
770 return true;
771 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
772 return true;
773 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
774 return true;
775 }
776 return false;
777 }
778
779 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
780 address stackStart = (address)thread->stack_base();
781 address stackEnd = (address)(stackStart - (address)thread->stack_size());
782 if (sp < stackStart && sp >= stackEnd) return true;
783 return false;
784 }
785
786 extern "C" void breakpoint() {
787 // use debugger to set breakpoint here
788 }
789
790 static thread_t main_thread;
791
792 // Thread start routine for all new Java threads
793 extern "C" void* java_start(void* thread_addr) {
794 // Try to randomize the cache line index of hot stack frames.
795 // This helps when threads of the same stack traces evict each other's
796 // cache lines. The threads can be either from the same JVM instance, or
797 // from different JVM instances. The benefit is especially true for
798 // processors with hyperthreading technology.
799 static int counter = 0;
800 int pid = os::current_process_id();
801 alloca(((pid ^ counter++) & 7) * 128);
802
803 int prio;
804 Thread* thread = (Thread*)thread_addr;
805 OSThread* osthr = thread->osthread();
806
807 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound
808 thread->_schedctl = (void *) schedctl_init();
809
810 if (UseNUMA) {
811 int lgrp_id = os::numa_get_group_id();
812 if (lgrp_id != -1) {
813 thread->set_lgrp_id(lgrp_id);
814 }
815 }
816
817 // If the creator called set priority before we started,
818 // we need to call set_native_priority now that we have an lwp.
819 // We used to get the priority from thr_getprio (we called
820 // thr_setprio way back in create_thread) and pass it to
821 // set_native_priority, but Solaris scales the priority
822 // in java_to_os_priority, so when we read it back here,
823 // we pass trash to set_native_priority instead of what's
824 // in java_to_os_priority. So we save the native priority
825 // in the osThread and recall it here.
826
827 if (osthr->thread_id() != -1) {
828 if (UseThreadPriorities) {
829 int prio = osthr->native_priority();
830 if (ThreadPriorityVerbose) {
831 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
832 INTPTR_FORMAT ", setting priority: %d\n",
833 osthr->thread_id(), osthr->lwp_id(), prio);
834 }
835 os::set_native_priority(thread, prio);
836 }
837 } else if (ThreadPriorityVerbose) {
838 warning("Can't set priority in _start routine, thread id hasn't been set\n");
839 }
840
841 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
842
843 // initialize signal mask for this thread
844 os::Solaris::hotspot_sigmask(thread);
845
846 thread->run();
847
848 // One less thread is executing
849 // When the VMThread gets here, the main thread may have already exited
850 // which frees the CodeHeap containing the Atomic::dec code
851 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
852 Atomic::dec(&os::Solaris::_os_thread_count);
853 }
854
855 if (UseDetachedThreads) {
856 thr_exit(NULL);
857 ShouldNotReachHere();
858 }
859 return NULL;
860 }
861
862 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
863 // Allocate the OSThread object
864 OSThread* osthread = new OSThread(NULL, NULL);
865 if (osthread == NULL) return NULL;
866
867 // Store info on the Solaris thread into the OSThread
868 osthread->set_thread_id(thread_id);
869 osthread->set_lwp_id(_lwp_self());
870 thread->_schedctl = (void *) schedctl_init();
871
872 if (UseNUMA) {
873 int lgrp_id = os::numa_get_group_id();
874 if (lgrp_id != -1) {
875 thread->set_lgrp_id(lgrp_id);
876 }
877 }
878
879 if (ThreadPriorityVerbose) {
880 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
881 osthread->thread_id(), osthread->lwp_id());
882 }
883
884 // Initial thread state is INITIALIZED, not SUSPENDED
885 osthread->set_state(INITIALIZED);
886
887 return osthread;
888 }
889
890 void os::Solaris::hotspot_sigmask(Thread* thread) {
891 //Save caller's signal mask
892 sigset_t sigmask;
893 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
894 OSThread *osthread = thread->osthread();
895 osthread->set_caller_sigmask(sigmask);
896
897 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
898 if (!ReduceSignalUsage) {
899 if (thread->is_VM_thread()) {
900 // Only the VM thread handles BREAK_SIGNAL ...
901 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
902 } else {
903 // ... all other threads block BREAK_SIGNAL
904 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
905 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
906 }
907 }
908 }
909
910 bool os::create_attached_thread(JavaThread* thread) {
911 #ifdef ASSERT
912 thread->verify_not_published();
913 #endif
914 OSThread* osthread = create_os_thread(thread, thr_self());
915 if (osthread == NULL) {
916 return false;
917 }
918
919 // Initial thread state is RUNNABLE
920 osthread->set_state(RUNNABLE);
921 thread->set_osthread(osthread);
922
923 // initialize signal mask for this thread
924 // and save the caller's signal mask
925 os::Solaris::hotspot_sigmask(thread);
926
927 return true;
928 }
929
930 bool os::create_main_thread(JavaThread* thread) {
931 #ifdef ASSERT
932 thread->verify_not_published();
933 #endif
934 if (_starting_thread == NULL) {
935 _starting_thread = create_os_thread(thread, main_thread);
936 if (_starting_thread == NULL) {
937 return false;
938 }
939 }
940
941 // The primodial thread is runnable from the start
942 _starting_thread->set_state(RUNNABLE);
943
944 thread->set_osthread(_starting_thread);
945
946 // initialize signal mask for this thread
947 // and save the caller's signal mask
948 os::Solaris::hotspot_sigmask(thread);
949
950 return true;
951 }
952
953
954 bool os::create_thread(Thread* thread, ThreadType thr_type,
955 size_t stack_size) {
956 // Allocate the OSThread object
957 OSThread* osthread = new OSThread(NULL, NULL);
958 if (osthread == NULL) {
959 return false;
960 }
961
962 if (ThreadPriorityVerbose) {
963 char *thrtyp;
964 switch (thr_type) {
965 case vm_thread:
966 thrtyp = (char *)"vm";
967 break;
968 case cgc_thread:
969 thrtyp = (char *)"cgc";
970 break;
971 case pgc_thread:
972 thrtyp = (char *)"pgc";
973 break;
974 case java_thread:
975 thrtyp = (char *)"java";
976 break;
977 case compiler_thread:
978 thrtyp = (char *)"compiler";
979 break;
980 case watcher_thread:
981 thrtyp = (char *)"watcher";
982 break;
983 default:
984 thrtyp = (char *)"unknown";
985 break;
986 }
987 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
988 }
989
990 // Calculate stack size if it's not specified by caller.
991 if (stack_size == 0) {
992 // The default stack size 1M (2M for LP64).
993 stack_size = (BytesPerWord >> 2) * K * K;
994
995 switch (thr_type) {
996 case os::java_thread:
997 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
998 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
999 break;
1000 case os::compiler_thread:
1001 if (CompilerThreadStackSize > 0) {
1002 stack_size = (size_t)(CompilerThreadStackSize * K);
1003 break;
1004 } // else fall through:
1005 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1006 case os::vm_thread:
1007 case os::pgc_thread:
1008 case os::cgc_thread:
1009 case os::watcher_thread:
1010 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1011 break;
1012 }
1013 }
1014 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1015
1016 // Initial state is ALLOCATED but not INITIALIZED
1017 osthread->set_state(ALLOCATED);
1018
1019 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1020 // We got lots of threads. Check if we still have some address space left.
1021 // Need to be at least 5Mb of unreserved address space. We do check by
1022 // trying to reserve some.
1023 const size_t VirtualMemoryBangSize = 20*K*K;
1024 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1025 if (mem == NULL) {
1026 delete osthread;
1027 return false;
1028 } else {
1029 // Release the memory again
1030 os::release_memory(mem, VirtualMemoryBangSize);
1031 }
1032 }
1033
1034 // Setup osthread because the child thread may need it.
1035 thread->set_osthread(osthread);
1036
1037 // Create the Solaris thread
1038 thread_t tid = 0;
1039 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED;
1040 int status;
1041
1042 // Mark that we don't have an lwp or thread id yet.
1043 // In case we attempt to set the priority before the thread starts.
1044 osthread->set_lwp_id(-1);
1045 osthread->set_thread_id(-1);
1046
1047 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1048 if (status != 0) {
1049 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1050 perror("os::create_thread");
1051 }
1052 thread->set_osthread(NULL);
1053 // Need to clean up stuff we've allocated so far
1054 delete osthread;
1055 return false;
1056 }
1057
1058 Atomic::inc(&os::Solaris::_os_thread_count);
1059
1060 // Store info on the Solaris thread into the OSThread
1061 osthread->set_thread_id(tid);
1062
1063 // Remember that we created this thread so we can set priority on it
1064 osthread->set_vm_created();
1065
1066 // Initial thread state is INITIALIZED, not SUSPENDED
1067 osthread->set_state(INITIALIZED);
1068
1069 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1070 return true;
1071 }
1072
1073 // defined for >= Solaris 10. This allows builds on earlier versions
1074 // of Solaris to take advantage of the newly reserved Solaris JVM signals
1075 // With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1076 // and -XX:+UseAltSigs does nothing since these should have no conflict
1077 //
1078 #if !defined(SIGJVM1)
1079 #define SIGJVM1 39
1080 #define SIGJVM2 40
1081 #endif
1082
1083 debug_only(static bool signal_sets_initialized = false);
1084 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1085 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1086 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1087
1088 bool os::Solaris::is_sig_ignored(int sig) {
1089 struct sigaction oact;
1090 sigaction(sig, (struct sigaction*)NULL, &oact);
1091 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1092 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1093 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) {
1094 return true;
1095 } else {
1096 return false;
1097 }
1098 }
1099
1100 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1101 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1102 static bool isJVM1available() {
1103 return SIGJVM1 < SIGRTMIN;
1104 }
1105
1106 void os::Solaris::signal_sets_init() {
1107 // Should also have an assertion stating we are still single-threaded.
1108 assert(!signal_sets_initialized, "Already initialized");
1109 // Fill in signals that are necessarily unblocked for all threads in
1110 // the VM. Currently, we unblock the following signals:
1111 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1112 // by -Xrs (=ReduceSignalUsage));
1113 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1114 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1115 // the dispositions or masks wrt these signals.
1116 // Programs embedding the VM that want to use the above signals for their
1117 // own purposes must, at this time, use the "-Xrs" option to prevent
1118 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1119 // (See bug 4345157, and other related bugs).
1120 // In reality, though, unblocking these signals is really a nop, since
1121 // these signals are not blocked by default.
1122 sigemptyset(&unblocked_sigs);
1123 sigemptyset(&allowdebug_blocked_sigs);
1124 sigaddset(&unblocked_sigs, SIGILL);
1125 sigaddset(&unblocked_sigs, SIGSEGV);
1126 sigaddset(&unblocked_sigs, SIGBUS);
1127 sigaddset(&unblocked_sigs, SIGFPE);
1128
1129 if (isJVM1available) {
1130 os::Solaris::set_SIGinterrupt(SIGJVM1);
1131 os::Solaris::set_SIGasync(SIGJVM2);
1132 } else if (UseAltSigs) {
1133 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1134 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1135 } else {
1136 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1137 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1138 }
1139
1140 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1141 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1142
1143 if (!ReduceSignalUsage) {
1144 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1145 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1146 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1147 }
1148 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1149 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1150 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1151 }
1152 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1153 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1154 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1155 }
1156 }
1157 // Fill in signals that are blocked by all but the VM thread.
1158 sigemptyset(&vm_sigs);
1159 if (!ReduceSignalUsage) {
1160 sigaddset(&vm_sigs, BREAK_SIGNAL);
1161 }
1162 debug_only(signal_sets_initialized = true);
1163
1164 // For diagnostics only used in run_periodic_checks
1165 sigemptyset(&check_signal_done);
1166 }
1167
1168 // These are signals that are unblocked while a thread is running Java.
1169 // (For some reason, they get blocked by default.)
1170 sigset_t* os::Solaris::unblocked_signals() {
1171 assert(signal_sets_initialized, "Not initialized");
1172 return &unblocked_sigs;
1173 }
1174
1175 // These are the signals that are blocked while a (non-VM) thread is
1176 // running Java. Only the VM thread handles these signals.
1177 sigset_t* os::Solaris::vm_signals() {
1178 assert(signal_sets_initialized, "Not initialized");
1179 return &vm_sigs;
1180 }
1181
1182 // These are signals that are blocked during cond_wait to allow debugger in
1183 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1184 assert(signal_sets_initialized, "Not initialized");
1185 return &allowdebug_blocked_sigs;
1186 }
1187
1188
1189 void _handle_uncaught_cxx_exception() {
1190 VMError err("An uncaught C++ exception");
1191 err.report_and_die();
1192 }
1193
1194
1195 // First crack at OS-specific initialization, from inside the new thread.
1196 void os::initialize_thread(Thread* thr) {
1197 int r = thr_main();
1198 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
1199 if (r) {
1200 JavaThread* jt = (JavaThread *)thr;
1201 assert(jt != NULL, "Sanity check");
1202 size_t stack_size;
1203 address base = jt->stack_base();
1204 if (Arguments::created_by_java_launcher()) {
1205 // Use 2MB to allow for Solaris 7 64 bit mode.
1206 stack_size = JavaThread::stack_size_at_create() == 0
1207 ? 2048*K : JavaThread::stack_size_at_create();
1208
1209 // There are rare cases when we may have already used more than
1210 // the basic stack size allotment before this method is invoked.
1211 // Attempt to allow for a normally sized java_stack.
1212 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1213 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1214 } else {
1215 // 6269555: If we were not created by a Java launcher, i.e. if we are
1216 // running embedded in a native application, treat the primordial thread
1217 // as much like a native attached thread as possible. This means using
1218 // the current stack size from thr_stksegment(), unless it is too large
1219 // to reliably setup guard pages. A reasonable max size is 8MB.
1220 size_t current_size = current_stack_size();
1221 // This should never happen, but just in case....
1222 if (current_size == 0) current_size = 2 * K * K;
1223 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1224 }
1225 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1226 stack_size = (size_t)(base - bottom);
1227
1228 assert(stack_size > 0, "Stack size calculation problem");
1229
1230 if (stack_size > jt->stack_size()) {
1231 #ifndef PRODUCT
1232 struct rlimit limits;
1233 getrlimit(RLIMIT_STACK, &limits);
1234 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1235 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1236 #endif
1237 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n"
1238 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1239 "See limit(1) to increase the stack size limit.",
1240 stack_size / K, jt->stack_size() / K);
1241 vm_exit(1);
1242 }
1243 assert(jt->stack_size() >= stack_size,
1244 "Attempt to map more stack than was allocated");
1245 jt->set_stack_size(stack_size);
1246 }
1247
1248 // With the T2 libthread (T1 is no longer supported) threads are always bound
1249 // and we use stackbanging in all cases.
1250
1251 os::Solaris::init_thread_fpu_state();
1252 std::set_terminate(_handle_uncaught_cxx_exception);
1253 }
1254
1255
1256
1257 // Free Solaris resources related to the OSThread
1258 void os::free_thread(OSThread* osthread) {
1259 assert(osthread != NULL, "os::free_thread but osthread not set");
1260
1261
1262 // We are told to free resources of the argument thread,
1263 // but we can only really operate on the current thread.
1264 // The main thread must take the VMThread down synchronously
1265 // before the main thread exits and frees up CodeHeap
1266 guarantee((Thread::current()->osthread() == osthread
1267 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1268 if (Thread::current()->osthread() == osthread) {
1269 // Restore caller's signal mask
1270 sigset_t sigmask = osthread->caller_sigmask();
1271 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1272 }
1273 delete osthread;
1274 }
1275
1276 void os::pd_start_thread(Thread* thread) {
1277 int status = thr_continue(thread->osthread()->thread_id());
1278 assert_status(status == 0, status, "thr_continue failed");
1279 }
1280
1281
1282 intx os::current_thread_id() {
1283 return (intx)thr_self();
1284 }
1285
1286 static pid_t _initial_pid = 0;
1287
1288 int os::current_process_id() {
1289 return (int)(_initial_pid ? _initial_pid : getpid());
1290 }
1291
1292 int os::allocate_thread_local_storage() {
1293 // %%% in Win32 this allocates a memory segment pointed to by a
1294 // register. Dan Stein can implement a similar feature in
1295 // Solaris. Alternatively, the VM can do the same thing
1296 // explicitly: malloc some storage and keep the pointer in a
1297 // register (which is part of the thread's context) (or keep it
1298 // in TLS).
1299 // %%% In current versions of Solaris, thr_self and TSD can
1300 // be accessed via short sequences of displaced indirections.
1301 // The value of thr_self is available as %g7(36).
1302 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1303 // assuming that the current thread already has a value bound to k.
1304 // It may be worth experimenting with such access patterns,
1305 // and later having the parameters formally exported from a Solaris
1306 // interface. I think, however, that it will be faster to
1307 // maintain the invariant that %g2 always contains the
1308 // JavaThread in Java code, and have stubs simply
1309 // treat %g2 as a caller-save register, preserving it in a %lN.
1310 thread_key_t tk;
1311 if (thr_keycreate(&tk, NULL)) {
1312 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1313 "(%s)", strerror(errno)));
1314 }
1315 return int(tk);
1316 }
1317
1318 void os::free_thread_local_storage(int index) {
1319 // %%% don't think we need anything here
1320 // if (pthread_key_delete((pthread_key_t) tk)) {
1321 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1322 // }
1323 }
1324
1325 // libthread allocate for tsd_common is a version specific
1326 // small number - point is NO swap space available
1327 #define SMALLINT 32
1328 void os::thread_local_storage_at_put(int index, void* value) {
1329 // %%% this is used only in threadLocalStorage.cpp
1330 if (thr_setspecific((thread_key_t)index, value)) {
1331 if (errno == ENOMEM) {
1332 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR,
1333 "thr_setspecific: out of swap space");
1334 } else {
1335 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1336 "(%s)", strerror(errno)));
1337 }
1338 } else {
1339 ThreadLocalStorage::set_thread_in_slot((Thread *) value);
1340 }
1341 }
1342
1343 // This function could be called before TLS is initialized, for example, when
1344 // VM receives an async signal or when VM causes a fatal error during
1345 // initialization. Return NULL if thr_getspecific() fails.
1346 void* os::thread_local_storage_at(int index) {
1347 // %%% this is used only in threadLocalStorage.cpp
1348 void* r = NULL;
1349 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1350 }
1351
1352
1353 // gethrtime() should be monotonic according to the documentation,
1354 // but some virtualized platforms are known to break this guarantee.
1355 // getTimeNanos() must be guaranteed not to move backwards, so we
1356 // are forced to add a check here.
1357 inline hrtime_t getTimeNanos() {
1358 const hrtime_t now = gethrtime();
1359 const hrtime_t prev = max_hrtime;
1360 if (now <= prev) {
1361 return prev; // same or retrograde time;
1362 }
1363 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1364 assert(obsv >= prev, "invariant"); // Monotonicity
1365 // If the CAS succeeded then we're done and return "now".
1366 // If the CAS failed and the observed value "obsv" is >= now then
1367 // we should return "obsv". If the CAS failed and now > obsv > prv then
1368 // some other thread raced this thread and installed a new value, in which case
1369 // we could either (a) retry the entire operation, (b) retry trying to install now
1370 // or (c) just return obsv. We use (c). No loop is required although in some cases
1371 // we might discard a higher "now" value in deference to a slightly lower but freshly
1372 // installed obsv value. That's entirely benign -- it admits no new orderings compared
1373 // to (a) or (b) -- and greatly reduces coherence traffic.
1374 // We might also condition (c) on the magnitude of the delta between obsv and now.
1375 // Avoiding excessive CAS operations to hot RW locations is critical.
1376 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate
1377 return (prev == obsv) ? now : obsv;
1378 }
1379
1380 // Time since start-up in seconds to a fine granularity.
1381 // Used by VMSelfDestructTimer and the MemProfiler.
1382 double os::elapsedTime() {
1383 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1384 }
1385
1386 jlong os::elapsed_counter() {
1387 return (jlong)(getTimeNanos() - first_hrtime);
1388 }
1389
1390 jlong os::elapsed_frequency() {
1391 return hrtime_hz;
1392 }
1393
1394 // Return the real, user, and system times in seconds from an
1395 // arbitrary fixed point in the past.
1396 bool os::getTimesSecs(double* process_real_time,
1397 double* process_user_time,
1398 double* process_system_time) {
1399 struct tms ticks;
1400 clock_t real_ticks = times(&ticks);
1401
1402 if (real_ticks == (clock_t) (-1)) {
1403 return false;
1404 } else {
1405 double ticks_per_second = (double) clock_tics_per_sec;
1406 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1407 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1408 // For consistency return the real time from getTimeNanos()
1409 // converted to seconds.
1410 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1411
1412 return true;
1413 }
1414 }
1415
1416 bool os::supports_vtime() { return true; }
1417
1418 bool os::enable_vtime() {
1419 int fd = ::open("/proc/self/ctl", O_WRONLY);
1420 if (fd == -1) {
1421 return false;
1422 }
1423
1424 long cmd[] = { PCSET, PR_MSACCT };
1425 int res = ::write(fd, cmd, sizeof(long) * 2);
1426 ::close(fd);
1427 if (res != sizeof(long) * 2) {
1428 return false;
1429 }
1430 return true;
1431 }
1432
1433 bool os::vtime_enabled() {
1434 int fd = ::open("/proc/self/status", O_RDONLY);
1435 if (fd == -1) {
1436 return false;
1437 }
1438
1439 pstatus_t status;
1440 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1441 ::close(fd);
1442 if (res != sizeof(pstatus_t)) {
1443 return false;
1444 }
1445 return status.pr_flags & PR_MSACCT;
1446 }
1447
1448 double os::elapsedVTime() {
1449 return (double)gethrvtime() / (double)hrtime_hz;
1450 }
1451
1452 // Used internally for comparisons only
1453 // getTimeMillis guaranteed to not move backwards on Solaris
1454 jlong getTimeMillis() {
1455 jlong nanotime = getTimeNanos();
1456 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1457 }
1458
1459 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1460 jlong os::javaTimeMillis() {
1461 timeval t;
1462 if (gettimeofday(&t, NULL) == -1) {
1463 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1464 }
1465 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1466 }
1467
1468 void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) {
1469 timeval t;
1470 if (gettimeofday(&t, NULL) == -1) {
1471 fatal(err_msg("os::javaTimeSystemUTC: gettimeofday (%s)", strerror(errno)));
1472 }
1473 seconds = jlong(t.tv_sec);
1474 nanos = jlong(t.tv_usec) * 1000;
1475 }
1476
1477
1478 jlong os::javaTimeNanos() {
1479 return (jlong)getTimeNanos();
1480 }
1481
1482 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1483 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1484 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1485 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1486 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1487 }
1488
1489 char * os::local_time_string(char *buf, size_t buflen) {
1490 struct tm t;
1491 time_t long_time;
1492 time(&long_time);
1493 localtime_r(&long_time, &t);
1494 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1495 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1496 t.tm_hour, t.tm_min, t.tm_sec);
1497 return buf;
1498 }
1499
1500 // Note: os::shutdown() might be called very early during initialization, or
1501 // called from signal handler. Before adding something to os::shutdown(), make
1502 // sure it is async-safe and can handle partially initialized VM.
1503 void os::shutdown() {
1504
1505 // allow PerfMemory to attempt cleanup of any persistent resources
1506 perfMemory_exit();
1507
1508 // needs to remove object in file system
1509 AttachListener::abort();
1510
1511 // flush buffered output, finish log files
1512 ostream_abort();
1513
1514 // Check for abort hook
1515 abort_hook_t abort_hook = Arguments::abort_hook();
1516 if (abort_hook != NULL) {
1517 abort_hook();
1518 }
1519 }
1520
1521 // Note: os::abort() might be called very early during initialization, or
1522 // called from signal handler. Before adding something to os::abort(), make
1523 // sure it is async-safe and can handle partially initialized VM.
1524 void os::abort(bool dump_core) {
1525 abort(dump_core, NULL, NULL);
1526 }
1527
1528 void os::abort(bool dump_core, void* siginfo, void* context) {
1529 os::shutdown();
1530 if (dump_core) {
1531 #ifndef PRODUCT
1532 fdStream out(defaultStream::output_fd());
1533 out.print_raw("Current thread is ");
1534 char buf[16];
1535 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1536 out.print_raw_cr(buf);
1537 out.print_raw_cr("Dumping core ...");
1538 #endif
1539 ::abort(); // dump core (for debugging)
1540 }
1541
1542 ::exit(1);
1543 }
1544
1545 // Die immediately, no exit hook, no abort hook, no cleanup.
1546 void os::die() {
1547 ::abort(); // dump core (for debugging)
1548 }
1549
1550 // DLL functions
1551
1552 const char* os::dll_file_extension() { return ".so"; }
1553
1554 // This must be hard coded because it's the system's temporary
1555 // directory not the java application's temp directory, ala java.io.tmpdir.
1556 const char* os::get_temp_directory() { return "/tmp"; }
1557
1558 static bool file_exists(const char* filename) {
1559 struct stat statbuf;
1560 if (filename == NULL || strlen(filename) == 0) {
1561 return false;
1562 }
1563 return os::stat(filename, &statbuf) == 0;
1564 }
1565
1566 bool os::dll_build_name(char* buffer, size_t buflen,
1567 const char* pname, const char* fname) {
1568 bool retval = false;
1569 const size_t pnamelen = pname ? strlen(pname) : 0;
1570
1571 // Return error on buffer overflow.
1572 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1573 return retval;
1574 }
1575
1576 if (pnamelen == 0) {
1577 snprintf(buffer, buflen, "lib%s.so", fname);
1578 retval = true;
1579 } else if (strchr(pname, *os::path_separator()) != NULL) {
1580 int n;
1581 char** pelements = split_path(pname, &n);
1582 if (pelements == NULL) {
1583 return false;
1584 }
1585 for (int i = 0; i < n; i++) {
1586 // really shouldn't be NULL but what the heck, check can't hurt
1587 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1588 continue; // skip the empty path values
1589 }
1590 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1591 if (file_exists(buffer)) {
1592 retval = true;
1593 break;
1594 }
1595 }
1596 // release the storage
1597 for (int i = 0; i < n; i++) {
1598 if (pelements[i] != NULL) {
1599 FREE_C_HEAP_ARRAY(char, pelements[i]);
1600 }
1601 }
1602 if (pelements != NULL) {
1603 FREE_C_HEAP_ARRAY(char*, pelements);
1604 }
1605 } else {
1606 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1607 retval = true;
1608 }
1609 return retval;
1610 }
1611
1612 // check if addr is inside libjvm.so
1613 bool os::address_is_in_vm(address addr) {
1614 static address libjvm_base_addr;
1615 Dl_info dlinfo;
1616
1617 if (libjvm_base_addr == NULL) {
1618 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
1619 libjvm_base_addr = (address)dlinfo.dli_fbase;
1620 }
1621 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1622 }
1623
1624 if (dladdr((void *)addr, &dlinfo) != 0) {
1625 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1626 }
1627
1628 return false;
1629 }
1630
1631 typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int);
1632 static dladdr1_func_type dladdr1_func = NULL;
1633
1634 bool os::dll_address_to_function_name(address addr, char *buf,
1635 int buflen, int * offset) {
1636 // buf is not optional, but offset is optional
1637 assert(buf != NULL, "sanity check");
1638
1639 Dl_info dlinfo;
1640
1641 // dladdr1_func was initialized in os::init()
1642 if (dladdr1_func != NULL) {
1643 // yes, we have dladdr1
1644
1645 // Support for dladdr1 is checked at runtime; it may be
1646 // available even if the vm is built on a machine that does
1647 // not have dladdr1 support. Make sure there is a value for
1648 // RTLD_DL_SYMENT.
1649 #ifndef RTLD_DL_SYMENT
1650 #define RTLD_DL_SYMENT 1
1651 #endif
1652 #ifdef _LP64
1653 Elf64_Sym * info;
1654 #else
1655 Elf32_Sym * info;
1656 #endif
1657 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1658 RTLD_DL_SYMENT) != 0) {
1659 // see if we have a matching symbol that covers our address
1660 if (dlinfo.dli_saddr != NULL &&
1661 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1662 if (dlinfo.dli_sname != NULL) {
1663 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1664 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1665 }
1666 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1667 return true;
1668 }
1669 }
1670 // no matching symbol so try for just file info
1671 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1672 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1673 buf, buflen, offset, dlinfo.dli_fname)) {
1674 return true;
1675 }
1676 }
1677 }
1678 buf[0] = '\0';
1679 if (offset != NULL) *offset = -1;
1680 return false;
1681 }
1682
1683 // no, only dladdr is available
1684 if (dladdr((void *)addr, &dlinfo) != 0) {
1685 // see if we have a matching symbol
1686 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
1687 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1688 jio_snprintf(buf, buflen, dlinfo.dli_sname);
1689 }
1690 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1691 return true;
1692 }
1693 // no matching symbol so try for just file info
1694 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1695 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1696 buf, buflen, offset, dlinfo.dli_fname)) {
1697 return true;
1698 }
1699 }
1700 }
1701 buf[0] = '\0';
1702 if (offset != NULL) *offset = -1;
1703 return false;
1704 }
1705
1706 bool os::dll_address_to_library_name(address addr, char* buf,
1707 int buflen, int* offset) {
1708 // buf is not optional, but offset is optional
1709 assert(buf != NULL, "sanity check");
1710
1711 Dl_info dlinfo;
1712
1713 if (dladdr((void*)addr, &dlinfo) != 0) {
1714 if (dlinfo.dli_fname != NULL) {
1715 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1716 }
1717 if (dlinfo.dli_fbase != NULL && offset != NULL) {
1718 *offset = addr - (address)dlinfo.dli_fbase;
1719 }
1720 return true;
1721 }
1722
1723 buf[0] = '\0';
1724 if (offset) *offset = -1;
1725 return false;
1726 }
1727
1728 int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) {
1729 Dl_info dli;
1730 // Sanity check?
1731 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 ||
1732 dli.dli_fname == NULL) {
1733 return 1;
1734 }
1735
1736 void * handle = dlopen(dli.dli_fname, RTLD_LAZY);
1737 if (handle == NULL) {
1738 return 1;
1739 }
1740
1741 Link_map *map;
1742 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1743 if (map == NULL) {
1744 dlclose(handle);
1745 return 1;
1746 }
1747
1748 while (map->l_prev != NULL) {
1749 map = map->l_prev;
1750 }
1751
1752 while (map != NULL) {
1753 // Iterate through all map entries and call callback with fields of interest
1754 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) {
1755 dlclose(handle);
1756 return 1;
1757 }
1758 map = map->l_next;
1759 }
1760
1761 dlclose(handle);
1762 return 0;
1763 }
1764
1765 int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) {
1766 outputStream * out = (outputStream *) param;
1767 out->print_cr(PTR_FORMAT " \t%s", base_address, name);
1768 return 0;
1769 }
1770
1771 void os::print_dll_info(outputStream * st) {
1772 st->print_cr("Dynamic libraries:"); st->flush();
1773 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) {
1774 st->print_cr("Error: Cannot print dynamic libraries.");
1775 }
1776 }
1777
1778 // Loads .dll/.so and
1779 // in case of error it checks if .dll/.so was built for the
1780 // same architecture as Hotspot is running on
1781
1782 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
1783 void * result= ::dlopen(filename, RTLD_LAZY);
1784 if (result != NULL) {
1785 // Successful loading
1786 return result;
1787 }
1788
1789 Elf32_Ehdr elf_head;
1790
1791 // Read system error message into ebuf
1792 // It may or may not be overwritten below
1793 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
1794 ebuf[ebuflen-1]='\0';
1795 int diag_msg_max_length=ebuflen-strlen(ebuf);
1796 char* diag_msg_buf=ebuf+strlen(ebuf);
1797
1798 if (diag_msg_max_length==0) {
1799 // No more space in ebuf for additional diagnostics message
1800 return NULL;
1801 }
1802
1803
1804 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1805
1806 if (file_descriptor < 0) {
1807 // Can't open library, report dlerror() message
1808 return NULL;
1809 }
1810
1811 bool failed_to_read_elf_head=
1812 (sizeof(elf_head)!=
1813 (::read(file_descriptor, &elf_head,sizeof(elf_head))));
1814
1815 ::close(file_descriptor);
1816 if (failed_to_read_elf_head) {
1817 // file i/o error - report dlerror() msg
1818 return NULL;
1819 }
1820
1821 typedef struct {
1822 Elf32_Half code; // Actual value as defined in elf.h
1823 Elf32_Half compat_class; // Compatibility of archs at VM's sense
1824 char elf_class; // 32 or 64 bit
1825 char endianess; // MSB or LSB
1826 char* name; // String representation
1827 } arch_t;
1828
1829 static const arch_t arch_array[]={
1830 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1831 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1832 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
1833 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
1834 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1835 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1836 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
1837 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
1838 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
1839 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
1840 };
1841
1842 #if (defined IA32)
1843 static Elf32_Half running_arch_code=EM_386;
1844 #elif (defined AMD64)
1845 static Elf32_Half running_arch_code=EM_X86_64;
1846 #elif (defined IA64)
1847 static Elf32_Half running_arch_code=EM_IA_64;
1848 #elif (defined __sparc) && (defined _LP64)
1849 static Elf32_Half running_arch_code=EM_SPARCV9;
1850 #elif (defined __sparc) && (!defined _LP64)
1851 static Elf32_Half running_arch_code=EM_SPARC;
1852 #elif (defined __powerpc64__)
1853 static Elf32_Half running_arch_code=EM_PPC64;
1854 #elif (defined __powerpc__)
1855 static Elf32_Half running_arch_code=EM_PPC;
1856 #elif (defined ARM)
1857 static Elf32_Half running_arch_code=EM_ARM;
1858 #else
1859 #error Method os::dll_load requires that one of following is defined:\
1860 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
1861 #endif
1862
1863 // Identify compatability class for VM's architecture and library's architecture
1864 // Obtain string descriptions for architectures
1865
1866 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
1867 int running_arch_index=-1;
1868
1869 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) {
1870 if (running_arch_code == arch_array[i].code) {
1871 running_arch_index = i;
1872 }
1873 if (lib_arch.code == arch_array[i].code) {
1874 lib_arch.compat_class = arch_array[i].compat_class;
1875 lib_arch.name = arch_array[i].name;
1876 }
1877 }
1878
1879 assert(running_arch_index != -1,
1880 "Didn't find running architecture code (running_arch_code) in arch_array");
1881 if (running_arch_index == -1) {
1882 // Even though running architecture detection failed
1883 // we may still continue with reporting dlerror() message
1884 return NULL;
1885 }
1886
1887 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
1888 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
1889 return NULL;
1890 }
1891
1892 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
1893 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
1894 return NULL;
1895 }
1896
1897 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
1898 if (lib_arch.name!=NULL) {
1899 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1900 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
1901 lib_arch.name, arch_array[running_arch_index].name);
1902 } else {
1903 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1904 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
1905 lib_arch.code,
1906 arch_array[running_arch_index].name);
1907 }
1908 }
1909
1910 return NULL;
1911 }
1912
1913 void* os::dll_lookup(void* handle, const char* name) {
1914 return dlsym(handle, name);
1915 }
1916
1917 void* os::get_default_process_handle() {
1918 return (void*)::dlopen(NULL, RTLD_LAZY);
1919 }
1920
1921 int os::stat(const char *path, struct stat *sbuf) {
1922 char pathbuf[MAX_PATH];
1923 if (strlen(path) > MAX_PATH - 1) {
1924 errno = ENAMETOOLONG;
1925 return -1;
1926 }
1927 os::native_path(strcpy(pathbuf, path));
1928 return ::stat(pathbuf, sbuf);
1929 }
1930
1931 static bool _print_ascii_file(const char* filename, outputStream* st) {
1932 int fd = ::open(filename, O_RDONLY);
1933 if (fd == -1) {
1934 return false;
1935 }
1936
1937 char buf[32];
1938 int bytes;
1939 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
1940 st->print_raw(buf, bytes);
1941 }
1942
1943 ::close(fd);
1944
1945 return true;
1946 }
1947
1948 void os::print_os_info_brief(outputStream* st) {
1949 os::Solaris::print_distro_info(st);
1950
1951 os::Posix::print_uname_info(st);
1952
1953 os::Solaris::print_libversion_info(st);
1954 }
1955
1956 void os::print_os_info(outputStream* st) {
1957 st->print("OS:");
1958
1959 os::Solaris::print_distro_info(st);
1960
1961 os::Posix::print_uname_info(st);
1962
1963 os::Solaris::print_libversion_info(st);
1964
1965 os::Posix::print_rlimit_info(st);
1966
1967 os::Posix::print_load_average(st);
1968 }
1969
1970 void os::Solaris::print_distro_info(outputStream* st) {
1971 if (!_print_ascii_file("/etc/release", st)) {
1972 st->print("Solaris");
1973 }
1974 st->cr();
1975 }
1976
1977 void os::Solaris::print_libversion_info(outputStream* st) {
1978 st->print(" (T2 libthread)");
1979 st->cr();
1980 }
1981
1982 static bool check_addr0(outputStream* st) {
1983 jboolean status = false;
1984 int fd = ::open("/proc/self/map",O_RDONLY);
1985 if (fd >= 0) {
1986 prmap_t p;
1987 while (::read(fd, &p, sizeof(p)) > 0) {
1988 if (p.pr_vaddr == 0x0) {
1989 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
1990 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
1991 st->print("Access:");
1992 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
1993 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
1994 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
1995 st->cr();
1996 status = true;
1997 }
1998 }
1999 ::close(fd);
2000 }
2001 return status;
2002 }
2003
2004 void os::pd_print_cpu_info(outputStream* st) {
2005 // Nothing to do for now.
2006 }
2007
2008 void os::print_memory_info(outputStream* st) {
2009 st->print("Memory:");
2010 st->print(" %dk page", os::vm_page_size()>>10);
2011 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2012 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2013 st->cr();
2014 (void) check_addr0(st);
2015 }
2016
2017 void os::print_siginfo(outputStream* st, void* siginfo) {
2018 const siginfo_t* si = (const siginfo_t*)siginfo;
2019
2020 os::Posix::print_siginfo_brief(st, si);
2021
2022 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2023 UseSharedSpaces) {
2024 FileMapInfo* mapinfo = FileMapInfo::current_info();
2025 if (mapinfo->is_in_shared_space(si->si_addr)) {
2026 st->print("\n\nError accessing class data sharing archive." \
2027 " Mapped file inaccessible during execution, " \
2028 " possible disk/network problem.");
2029 }
2030 }
2031 st->cr();
2032 }
2033
2034 // Moved from whole group, because we need them here for diagnostic
2035 // prints.
2036 #define OLDMAXSIGNUM 32
2037 static int Maxsignum = 0;
2038 static int *ourSigFlags = NULL;
2039
2040 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2041
2042 int os::Solaris::get_our_sigflags(int sig) {
2043 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2044 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2045 return ourSigFlags[sig];
2046 }
2047
2048 void os::Solaris::set_our_sigflags(int sig, int flags) {
2049 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2050 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2051 ourSigFlags[sig] = flags;
2052 }
2053
2054
2055 static const char* get_signal_handler_name(address handler,
2056 char* buf, int buflen) {
2057 int offset;
2058 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2059 if (found) {
2060 // skip directory names
2061 const char *p1, *p2;
2062 p1 = buf;
2063 size_t len = strlen(os::file_separator());
2064 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2065 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2066 } else {
2067 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2068 }
2069 return buf;
2070 }
2071
2072 static void print_signal_handler(outputStream* st, int sig,
2073 char* buf, size_t buflen) {
2074 struct sigaction sa;
2075
2076 sigaction(sig, NULL, &sa);
2077
2078 st->print("%s: ", os::exception_name(sig, buf, buflen));
2079
2080 address handler = (sa.sa_flags & SA_SIGINFO)
2081 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2082 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2083
2084 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2085 st->print("SIG_DFL");
2086 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2087 st->print("SIG_IGN");
2088 } else {
2089 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2090 }
2091
2092 st->print(", sa_mask[0]=");
2093 os::Posix::print_signal_set_short(st, &sa.sa_mask);
2094
2095 address rh = VMError::get_resetted_sighandler(sig);
2096 // May be, handler was resetted by VMError?
2097 if (rh != NULL) {
2098 handler = rh;
2099 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2100 }
2101
2102 st->print(", sa_flags=");
2103 os::Posix::print_sa_flags(st, sa.sa_flags);
2104
2105 // Check: is it our handler?
2106 if (handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2107 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2108 // It is our signal handler
2109 // check for flags
2110 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2111 st->print(
2112 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2113 os::Solaris::get_our_sigflags(sig));
2114 }
2115 }
2116 st->cr();
2117 }
2118
2119 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2120 st->print_cr("Signal Handlers:");
2121 print_signal_handler(st, SIGSEGV, buf, buflen);
2122 print_signal_handler(st, SIGBUS , buf, buflen);
2123 print_signal_handler(st, SIGFPE , buf, buflen);
2124 print_signal_handler(st, SIGPIPE, buf, buflen);
2125 print_signal_handler(st, SIGXFSZ, buf, buflen);
2126 print_signal_handler(st, SIGILL , buf, buflen);
2127 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2128 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2129 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2130 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2131 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2132 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2133 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2134 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2135 }
2136
2137 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2138
2139 // Find the full path to the current module, libjvm.so
2140 void os::jvm_path(char *buf, jint buflen) {
2141 // Error checking.
2142 if (buflen < MAXPATHLEN) {
2143 assert(false, "must use a large-enough buffer");
2144 buf[0] = '\0';
2145 return;
2146 }
2147 // Lazy resolve the path to current module.
2148 if (saved_jvm_path[0] != 0) {
2149 strcpy(buf, saved_jvm_path);
2150 return;
2151 }
2152
2153 Dl_info dlinfo;
2154 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2155 assert(ret != 0, "cannot locate libjvm");
2156 if (ret != 0 && dlinfo.dli_fname != NULL) {
2157 realpath((char *)dlinfo.dli_fname, buf);
2158 } else {
2159 buf[0] = '\0';
2160 return;
2161 }
2162
2163 if (Arguments::sun_java_launcher_is_altjvm()) {
2164 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical
2165 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".
2166 // If "/jre/lib/" appears at the right place in the string, then
2167 // assume we are installed in a JDK and we're done. Otherwise, check
2168 // for a JAVA_HOME environment variable and fix up the path so it
2169 // looks like libjvm.so is installed there (append a fake suffix
2170 // hotspot/libjvm.so).
2171 const char *p = buf + strlen(buf) - 1;
2172 for (int count = 0; p > buf && count < 5; ++count) {
2173 for (--p; p > buf && *p != '/'; --p)
2174 /* empty */ ;
2175 }
2176
2177 if (strncmp(p, "/jre/lib/", 9) != 0) {
2178 // Look for JAVA_HOME in the environment.
2179 char* java_home_var = ::getenv("JAVA_HOME");
2180 if (java_home_var != NULL && java_home_var[0] != 0) {
2181 char cpu_arch[12];
2182 char* jrelib_p;
2183 int len;
2184 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2185 #ifdef _LP64
2186 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2187 if (strcmp(cpu_arch, "sparc") == 0) {
2188 strcat(cpu_arch, "v9");
2189 } else if (strcmp(cpu_arch, "i386") == 0) {
2190 strcpy(cpu_arch, "amd64");
2191 }
2192 #endif
2193 // Check the current module name "libjvm.so".
2194 p = strrchr(buf, '/');
2195 assert(strstr(p, "/libjvm") == p, "invalid library name");
2196
2197 realpath(java_home_var, buf);
2198 // determine if this is a legacy image or modules image
2199 // modules image doesn't have "jre" subdirectory
2200 len = strlen(buf);
2201 assert(len < buflen, "Ran out of buffer space");
2202 jrelib_p = buf + len;
2203 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2204 if (0 != access(buf, F_OK)) {
2205 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2206 }
2207
2208 if (0 == access(buf, F_OK)) {
2209 // Use current module name "libjvm.so"
2210 len = strlen(buf);
2211 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
2212 } else {
2213 // Go back to path of .so
2214 realpath((char *)dlinfo.dli_fname, buf);
2215 }
2216 }
2217 }
2218 }
2219
2220 strncpy(saved_jvm_path, buf, MAXPATHLEN);
2221 saved_jvm_path[MAXPATHLEN - 1] = '\0';
2222 }
2223
2224
2225 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2226 // no prefix required, not even "_"
2227 }
2228
2229
2230 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2231 // no suffix required
2232 }
2233
2234 // This method is a copy of JDK's sysGetLastErrorString
2235 // from src/solaris/hpi/src/system_md.c
2236
2237 size_t os::lasterror(char *buf, size_t len) {
2238 if (errno == 0) return 0;
2239
2240 const char *s = ::strerror(errno);
2241 size_t n = ::strlen(s);
2242 if (n >= len) {
2243 n = len - 1;
2244 }
2245 ::strncpy(buf, s, n);
2246 buf[n] = '\0';
2247 return n;
2248 }
2249
2250
2251 // sun.misc.Signal
2252
2253 extern "C" {
2254 static void UserHandler(int sig, void *siginfo, void *context) {
2255 // Ctrl-C is pressed during error reporting, likely because the error
2256 // handler fails to abort. Let VM die immediately.
2257 if (sig == SIGINT && is_error_reported()) {
2258 os::die();
2259 }
2260
2261 os::signal_notify(sig);
2262 // We do not need to reinstate the signal handler each time...
2263 }
2264 }
2265
2266 void* os::user_handler() {
2267 return CAST_FROM_FN_PTR(void*, UserHandler);
2268 }
2269
2270 static int sem_max_value = -1;
2271
2272 Semaphore::Semaphore(uint value, uint max) {
2273 guarantee(value <= max, "value lower than max");
2274
2275 static long sem_value_max = sysconf(_SC_SEM_VALUE_MAX);
2276 guarantee(max == Semaphore::NoMaxCount || value <= sem_max_value,
2277 err_msg("Max value: %u set higher than SEM_VALUE_MAX: %l", sem_value_max));
2278
2279 int ret = sema_init(&_semaphore, value, NULL, NULL);
2280
2281 guarantee(ret == 0, "Failed to initialize semaphore");
2282 }
2283
2284 Semaphore::~Semaphore() {
2285 sema_destroy(&_semaphore);
2286 }
2287
2288 void Semaphore::signal() {
2289 int ret = sema_post(&_semaphore);
2290
2291 assert(ret == 0, err_msg("Semaphore signal failed: %d", errno));
2292 }
2293
2294 void Semaphore::signal(uint count) {
2295 for (uint i = 0; i < count; i++) {
2296 signal();
2297 }
2298 }
2299
2300 void Semaphore::wait() {
2301 int ret;
2302
2303 do {
2304 ret = sema_wait(&_semaphore);
2305 // Retry if the wait was interrupted by a signal.
2306 } while (errno == EINTR);
2307
2308 assert(ret == 0, err_msg("Semaphore wait failed: %d", errno));
2309 }
2310
2311 bool Semaphore::trywait() {
2312 return sema_trywait(&_semaphore) == 0;
2313 }
2314
2315 bool Semaphore::timedwait(unsigned int sec, int nsec) {
2316 struct timespec ts;
2317 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec);
2318
2319 while (1) {
2320 int result = sema_timedwait(&_semaphore, &ts);
2321 if (result == 0) {
2322 return true;
2323 } else if (errno == EINTR) {
2324 continue;
2325 } else if (errno == ETIME) {
2326 return false;
2327 } else {
2328 return false;
2329 }
2330 }
2331 }
2332
2333 extern "C" {
2334 typedef void (*sa_handler_t)(int);
2335 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2336 }
2337
2338 void* os::signal(int signal_number, void* handler) {
2339 struct sigaction sigAct, oldSigAct;
2340 sigfillset(&(sigAct.sa_mask));
2341 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2342 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2343
2344 if (sigaction(signal_number, &sigAct, &oldSigAct)) {
2345 // -1 means registration failed
2346 return (void *)-1;
2347 }
2348
2349 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2350 }
2351
2352 void os::signal_raise(int signal_number) {
2353 raise(signal_number);
2354 }
2355
2356 // The following code is moved from os.cpp for making this
2357 // code platform specific, which it is by its very nature.
2358
2359 // a counter for each possible signal value
2360 static int Sigexit = 0;
2361 static int Maxlibjsigsigs;
2362 static jint *pending_signals = NULL;
2363 static int *preinstalled_sigs = NULL;
2364 static struct sigaction *chainedsigactions = NULL;
2365 static sema_t sig_sem;
2366 typedef int (*version_getting_t)();
2367 version_getting_t os::Solaris::get_libjsig_version = NULL;
2368 static int libjsigversion = NULL;
2369
2370 int os::sigexitnum_pd() {
2371 assert(Sigexit > 0, "signal memory not yet initialized");
2372 return Sigexit;
2373 }
2374
2375 void os::Solaris::init_signal_mem() {
2376 // Initialize signal structures
2377 Maxsignum = SIGRTMAX;
2378 Sigexit = Maxsignum+1;
2379 assert(Maxsignum >0, "Unable to obtain max signal number");
2380
2381 Maxlibjsigsigs = Maxsignum;
2382
2383 // pending_signals has one int per signal
2384 // The additional signal is for SIGEXIT - exit signal to signal_thread
2385 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2386 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2387
2388 if (UseSignalChaining) {
2389 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2390 * (Maxsignum + 1), mtInternal);
2391 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2392 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2393 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2394 }
2395 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2396 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2397 }
2398
2399 void os::signal_init_pd() {
2400 int ret;
2401
2402 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2403 assert(ret == 0, "sema_init() failed");
2404 }
2405
2406 void os::signal_notify(int signal_number) {
2407 int ret;
2408
2409 Atomic::inc(&pending_signals[signal_number]);
2410 ret = ::sema_post(&sig_sem);
2411 assert(ret == 0, "sema_post() failed");
2412 }
2413
2414 static int check_pending_signals(bool wait_for_signal) {
2415 int ret;
2416 while (true) {
2417 for (int i = 0; i < Sigexit + 1; i++) {
2418 jint n = pending_signals[i];
2419 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2420 return i;
2421 }
2422 }
2423 if (!wait_for_signal) {
2424 return -1;
2425 }
2426 JavaThread *thread = JavaThread::current();
2427 ThreadBlockInVM tbivm(thread);
2428
2429 bool threadIsSuspended;
2430 do {
2431 thread->set_suspend_equivalent();
2432 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2433 while ((ret = ::sema_wait(&sig_sem)) == EINTR)
2434 ;
2435 assert(ret == 0, "sema_wait() failed");
2436
2437 // were we externally suspended while we were waiting?
2438 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2439 if (threadIsSuspended) {
2440 // The semaphore has been incremented, but while we were waiting
2441 // another thread suspended us. We don't want to continue running
2442 // while suspended because that would surprise the thread that
2443 // suspended us.
2444 ret = ::sema_post(&sig_sem);
2445 assert(ret == 0, "sema_post() failed");
2446
2447 thread->java_suspend_self();
2448 }
2449 } while (threadIsSuspended);
2450 }
2451 }
2452
2453 int os::signal_lookup() {
2454 return check_pending_signals(false);
2455 }
2456
2457 int os::signal_wait() {
2458 return check_pending_signals(true);
2459 }
2460
2461 ////////////////////////////////////////////////////////////////////////////////
2462 // Virtual Memory
2463
2464 static int page_size = -1;
2465
2466 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2467 // clear this var if support is not available.
2468 static bool has_map_align = true;
2469
2470 int os::vm_page_size() {
2471 assert(page_size != -1, "must call os::init");
2472 return page_size;
2473 }
2474
2475 // Solaris allocates memory by pages.
2476 int os::vm_allocation_granularity() {
2477 assert(page_size != -1, "must call os::init");
2478 return page_size;
2479 }
2480
2481 static bool recoverable_mmap_error(int err) {
2482 // See if the error is one we can let the caller handle. This
2483 // list of errno values comes from the Solaris mmap(2) man page.
2484 switch (err) {
2485 case EBADF:
2486 case EINVAL:
2487 case ENOTSUP:
2488 // let the caller deal with these errors
2489 return true;
2490
2491 default:
2492 // Any remaining errors on this OS can cause our reserved mapping
2493 // to be lost. That can cause confusion where different data
2494 // structures think they have the same memory mapped. The worst
2495 // scenario is if both the VM and a library think they have the
2496 // same memory mapped.
2497 return false;
2498 }
2499 }
2500
2501 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec,
2502 int err) {
2503 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2504 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec,
2505 strerror(err), err);
2506 }
2507
2508 static void warn_fail_commit_memory(char* addr, size_t bytes,
2509 size_t alignment_hint, bool exec,
2510 int err) {
2511 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2512 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes,
2513 alignment_hint, exec, strerror(err), err);
2514 }
2515
2516 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) {
2517 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2518 size_t size = bytes;
2519 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2520 if (res != NULL) {
2521 if (UseNUMAInterleaving) {
2522 numa_make_global(addr, bytes);
2523 }
2524 return 0;
2525 }
2526
2527 int err = errno; // save errno from mmap() call in mmap_chunk()
2528
2529 if (!recoverable_mmap_error(err)) {
2530 warn_fail_commit_memory(addr, bytes, exec, err);
2531 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory.");
2532 }
2533
2534 return err;
2535 }
2536
2537 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2538 return Solaris::commit_memory_impl(addr, bytes, exec) == 0;
2539 }
2540
2541 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec,
2542 const char* mesg) {
2543 assert(mesg != NULL, "mesg must be specified");
2544 int err = os::Solaris::commit_memory_impl(addr, bytes, exec);
2545 if (err != 0) {
2546 // the caller wants all commit errors to exit with the specified mesg:
2547 warn_fail_commit_memory(addr, bytes, exec, err);
2548 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2549 }
2550 }
2551
2552 size_t os::Solaris::page_size_for_alignment(size_t alignment) {
2553 assert(is_size_aligned(alignment, (size_t) vm_page_size()),
2554 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT,
2555 alignment, (size_t) vm_page_size()));
2556
2557 for (int i = 0; _page_sizes[i] != 0; i++) {
2558 if (is_size_aligned(alignment, _page_sizes[i])) {
2559 return _page_sizes[i];
2560 }
2561 }
2562
2563 return (size_t) vm_page_size();
2564 }
2565
2566 int os::Solaris::commit_memory_impl(char* addr, size_t bytes,
2567 size_t alignment_hint, bool exec) {
2568 int err = Solaris::commit_memory_impl(addr, bytes, exec);
2569 if (err == 0 && UseLargePages && alignment_hint > 0) {
2570 assert(is_size_aligned(bytes, alignment_hint),
2571 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint));
2572
2573 // The syscall memcntl requires an exact page size (see man memcntl for details).
2574 size_t page_size = page_size_for_alignment(alignment_hint);
2575 if (page_size > (size_t) vm_page_size()) {
2576 (void)Solaris::setup_large_pages(addr, bytes, page_size);
2577 }
2578 }
2579 return err;
2580 }
2581
2582 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2583 bool exec) {
2584 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0;
2585 }
2586
2587 void os::pd_commit_memory_or_exit(char* addr, size_t bytes,
2588 size_t alignment_hint, bool exec,
2589 const char* mesg) {
2590 assert(mesg != NULL, "mesg must be specified");
2591 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec);
2592 if (err != 0) {
2593 // the caller wants all commit errors to exit with the specified mesg:
2594 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err);
2595 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2596 }
2597 }
2598
2599 // Uncommit the pages in a specified region.
2600 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2601 if (madvise(addr, bytes, MADV_FREE) < 0) {
2602 debug_only(warning("MADV_FREE failed."));
2603 return;
2604 }
2605 }
2606
2607 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2608 return os::commit_memory(addr, size, !ExecMem);
2609 }
2610
2611 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2612 return os::uncommit_memory(addr, size);
2613 }
2614
2615 // Change the page size in a given range.
2616 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2617 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2618 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2619 if (UseLargePages) {
2620 size_t page_size = Solaris::page_size_for_alignment(alignment_hint);
2621 if (page_size > (size_t) vm_page_size()) {
2622 Solaris::setup_large_pages(addr, bytes, page_size);
2623 }
2624 }
2625 }
2626
2627 // Tell the OS to make the range local to the first-touching LWP
2628 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2629 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2630 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2631 debug_only(warning("MADV_ACCESS_LWP failed."));
2632 }
2633 }
2634
2635 // Tell the OS that this range would be accessed from different LWPs.
2636 void os::numa_make_global(char *addr, size_t bytes) {
2637 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2638 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2639 debug_only(warning("MADV_ACCESS_MANY failed."));
2640 }
2641 }
2642
2643 // Get the number of the locality groups.
2644 size_t os::numa_get_groups_num() {
2645 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2646 return n != -1 ? n : 1;
2647 }
2648
2649 // Get a list of leaf locality groups. A leaf lgroup is group that
2650 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2651 // board. An LWP is assigned to one of these groups upon creation.
2652 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2653 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2654 ids[0] = 0;
2655 return 1;
2656 }
2657 int result_size = 0, top = 1, bottom = 0, cur = 0;
2658 for (int k = 0; k < size; k++) {
2659 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2660 (Solaris::lgrp_id_t*)&ids[top], size - top);
2661 if (r == -1) {
2662 ids[0] = 0;
2663 return 1;
2664 }
2665 if (!r) {
2666 // That's a leaf node.
2667 assert(bottom <= cur, "Sanity check");
2668 // Check if the node has memory
2669 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2670 NULL, 0, LGRP_RSRC_MEM) > 0) {
2671 ids[bottom++] = ids[cur];
2672 }
2673 }
2674 top += r;
2675 cur++;
2676 }
2677 if (bottom == 0) {
2678 // Handle a situation, when the OS reports no memory available.
2679 // Assume UMA architecture.
2680 ids[0] = 0;
2681 return 1;
2682 }
2683 return bottom;
2684 }
2685
2686 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2687 bool os::numa_topology_changed() {
2688 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2689 if (is_stale != -1 && is_stale) {
2690 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2691 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2692 assert(c != 0, "Failure to initialize LGRP API");
2693 Solaris::set_lgrp_cookie(c);
2694 return true;
2695 }
2696 return false;
2697 }
2698
2699 // Get the group id of the current LWP.
2700 int os::numa_get_group_id() {
2701 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2702 if (lgrp_id == -1) {
2703 return 0;
2704 }
2705 const int size = os::numa_get_groups_num();
2706 int *ids = (int*)alloca(size * sizeof(int));
2707
2708 // Get the ids of all lgroups with memory; r is the count.
2709 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2710 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2711 if (r <= 0) {
2712 return 0;
2713 }
2714 return ids[os::random() % r];
2715 }
2716
2717 // Request information about the page.
2718 bool os::get_page_info(char *start, page_info* info) {
2719 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2720 uint64_t addr = (uintptr_t)start;
2721 uint64_t outdata[2];
2722 uint_t validity = 0;
2723
2724 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2725 return false;
2726 }
2727
2728 info->size = 0;
2729 info->lgrp_id = -1;
2730
2731 if ((validity & 1) != 0) {
2732 if ((validity & 2) != 0) {
2733 info->lgrp_id = outdata[0];
2734 }
2735 if ((validity & 4) != 0) {
2736 info->size = outdata[1];
2737 }
2738 return true;
2739 }
2740 return false;
2741 }
2742
2743 // Scan the pages from start to end until a page different than
2744 // the one described in the info parameter is encountered.
2745 char *os::scan_pages(char *start, char* end, page_info* page_expected,
2746 page_info* page_found) {
2747 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2748 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2749 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1];
2750 uint_t validity[MAX_MEMINFO_CNT];
2751
2752 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2753 uint64_t p = (uint64_t)start;
2754 while (p < (uint64_t)end) {
2755 addrs[0] = p;
2756 size_t addrs_count = 1;
2757 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2758 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2759 addrs_count++;
2760 }
2761
2762 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2763 return NULL;
2764 }
2765
2766 size_t i = 0;
2767 for (; i < addrs_count; i++) {
2768 if ((validity[i] & 1) != 0) {
2769 if ((validity[i] & 4) != 0) {
2770 if (outdata[types * i + 1] != page_expected->size) {
2771 break;
2772 }
2773 } else if (page_expected->size != 0) {
2774 break;
2775 }
2776
2777 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2778 if (outdata[types * i] != page_expected->lgrp_id) {
2779 break;
2780 }
2781 }
2782 } else {
2783 return NULL;
2784 }
2785 }
2786
2787 if (i < addrs_count) {
2788 if ((validity[i] & 2) != 0) {
2789 page_found->lgrp_id = outdata[types * i];
2790 } else {
2791 page_found->lgrp_id = -1;
2792 }
2793 if ((validity[i] & 4) != 0) {
2794 page_found->size = outdata[types * i + 1];
2795 } else {
2796 page_found->size = 0;
2797 }
2798 return (char*)addrs[i];
2799 }
2800
2801 p = addrs[addrs_count - 1] + page_size;
2802 }
2803 return end;
2804 }
2805
2806 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2807 size_t size = bytes;
2808 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2809 // uncommitted page. Otherwise, the read/write might succeed if we
2810 // have enough swap space to back the physical page.
2811 return
2812 NULL != Solaris::mmap_chunk(addr, size,
2813 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2814 PROT_NONE);
2815 }
2816
2817 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2818 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2819
2820 if (b == MAP_FAILED) {
2821 return NULL;
2822 }
2823 return b;
2824 }
2825
2826 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes,
2827 size_t alignment_hint, bool fixed) {
2828 char* addr = requested_addr;
2829 int flags = MAP_PRIVATE | MAP_NORESERVE;
2830
2831 assert(!(fixed && (alignment_hint > 0)),
2832 "alignment hint meaningless with fixed mmap");
2833
2834 if (fixed) {
2835 flags |= MAP_FIXED;
2836 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
2837 flags |= MAP_ALIGN;
2838 addr = (char*) alignment_hint;
2839 }
2840
2841 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2842 // uncommitted page. Otherwise, the read/write might succeed if we
2843 // have enough swap space to back the physical page.
2844 return mmap_chunk(addr, bytes, flags, PROT_NONE);
2845 }
2846
2847 char* os::pd_reserve_memory(size_t bytes, char* requested_addr,
2848 size_t alignment_hint) {
2849 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint,
2850 (requested_addr != NULL));
2851
2852 guarantee(requested_addr == NULL || requested_addr == addr,
2853 "OS failed to return requested mmap address.");
2854 return addr;
2855 }
2856
2857 // Reserve memory at an arbitrary address, only if that area is
2858 // available (and not reserved for something else).
2859
2860 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2861 const int max_tries = 10;
2862 char* base[max_tries];
2863 size_t size[max_tries];
2864
2865 // Solaris adds a gap between mmap'ed regions. The size of the gap
2866 // is dependent on the requested size and the MMU. Our initial gap
2867 // value here is just a guess and will be corrected later.
2868 bool had_top_overlap = false;
2869 bool have_adjusted_gap = false;
2870 size_t gap = 0x400000;
2871
2872 // Assert only that the size is a multiple of the page size, since
2873 // that's all that mmap requires, and since that's all we really know
2874 // about at this low abstraction level. If we need higher alignment,
2875 // we can either pass an alignment to this method or verify alignment
2876 // in one of the methods further up the call chain. See bug 5044738.
2877 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
2878
2879 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
2880 // Give it a try, if the kernel honors the hint we can return immediately.
2881 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
2882
2883 volatile int err = errno;
2884 if (addr == requested_addr) {
2885 return addr;
2886 } else if (addr != NULL) {
2887 pd_unmap_memory(addr, bytes);
2888 }
2889
2890 if (PrintMiscellaneous && Verbose) {
2891 char buf[256];
2892 buf[0] = '\0';
2893 if (addr == NULL) {
2894 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
2895 }
2896 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
2897 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
2898 "%s", bytes, requested_addr, addr, buf);
2899 }
2900
2901 // Address hint method didn't work. Fall back to the old method.
2902 // In theory, once SNV becomes our oldest supported platform, this
2903 // code will no longer be needed.
2904 //
2905 // Repeatedly allocate blocks until the block is allocated at the
2906 // right spot. Give up after max_tries.
2907 int i;
2908 for (i = 0; i < max_tries; ++i) {
2909 base[i] = reserve_memory(bytes);
2910
2911 if (base[i] != NULL) {
2912 // Is this the block we wanted?
2913 if (base[i] == requested_addr) {
2914 size[i] = bytes;
2915 break;
2916 }
2917
2918 // check that the gap value is right
2919 if (had_top_overlap && !have_adjusted_gap) {
2920 size_t actual_gap = base[i-1] - base[i] - bytes;
2921 if (gap != actual_gap) {
2922 // adjust the gap value and retry the last 2 allocations
2923 assert(i > 0, "gap adjustment code problem");
2924 have_adjusted_gap = true; // adjust the gap only once, just in case
2925 gap = actual_gap;
2926 if (PrintMiscellaneous && Verbose) {
2927 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
2928 }
2929 unmap_memory(base[i], bytes);
2930 unmap_memory(base[i-1], size[i-1]);
2931 i-=2;
2932 continue;
2933 }
2934 }
2935
2936 // Does this overlap the block we wanted? Give back the overlapped
2937 // parts and try again.
2938 //
2939 // There is still a bug in this code: if top_overlap == bytes,
2940 // the overlap is offset from requested region by the value of gap.
2941 // In this case giving back the overlapped part will not work,
2942 // because we'll give back the entire block at base[i] and
2943 // therefore the subsequent allocation will not generate a new gap.
2944 // This could be fixed with a new algorithm that used larger
2945 // or variable size chunks to find the requested region -
2946 // but such a change would introduce additional complications.
2947 // It's rare enough that the planets align for this bug,
2948 // so we'll just wait for a fix for 6204603/5003415 which
2949 // will provide a mmap flag to allow us to avoid this business.
2950
2951 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
2952 if (top_overlap >= 0 && top_overlap < bytes) {
2953 had_top_overlap = true;
2954 unmap_memory(base[i], top_overlap);
2955 base[i] += top_overlap;
2956 size[i] = bytes - top_overlap;
2957 } else {
2958 size_t bottom_overlap = base[i] + bytes - requested_addr;
2959 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
2960 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
2961 warning("attempt_reserve_memory_at: possible alignment bug");
2962 }
2963 unmap_memory(requested_addr, bottom_overlap);
2964 size[i] = bytes - bottom_overlap;
2965 } else {
2966 size[i] = bytes;
2967 }
2968 }
2969 }
2970 }
2971
2972 // Give back the unused reserved pieces.
2973
2974 for (int j = 0; j < i; ++j) {
2975 if (base[j] != NULL) {
2976 unmap_memory(base[j], size[j]);
2977 }
2978 }
2979
2980 return (i < max_tries) ? requested_addr : NULL;
2981 }
2982
2983 bool os::pd_release_memory(char* addr, size_t bytes) {
2984 size_t size = bytes;
2985 return munmap(addr, size) == 0;
2986 }
2987
2988 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
2989 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
2990 "addr must be page aligned");
2991 int retVal = mprotect(addr, bytes, prot);
2992 return retVal == 0;
2993 }
2994
2995 // Protect memory (Used to pass readonly pages through
2996 // JNI GetArray<type>Elements with empty arrays.)
2997 // Also, used for serialization page and for compressed oops null pointer
2998 // checking.
2999 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3000 bool is_committed) {
3001 unsigned int p = 0;
3002 switch (prot) {
3003 case MEM_PROT_NONE: p = PROT_NONE; break;
3004 case MEM_PROT_READ: p = PROT_READ; break;
3005 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3006 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3007 default:
3008 ShouldNotReachHere();
3009 }
3010 // is_committed is unused.
3011 return solaris_mprotect(addr, bytes, p);
3012 }
3013
3014 // guard_memory and unguard_memory only happens within stack guard pages.
3015 // Since ISM pertains only to the heap, guard and unguard memory should not
3016 /// happen with an ISM region.
3017 bool os::guard_memory(char* addr, size_t bytes) {
3018 return solaris_mprotect(addr, bytes, PROT_NONE);
3019 }
3020
3021 bool os::unguard_memory(char* addr, size_t bytes) {
3022 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3023 }
3024
3025 // Large page support
3026 static size_t _large_page_size = 0;
3027
3028 // Insertion sort for small arrays (descending order).
3029 static void insertion_sort_descending(size_t* array, int len) {
3030 for (int i = 0; i < len; i++) {
3031 size_t val = array[i];
3032 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3033 size_t tmp = array[key];
3034 array[key] = array[key - 1];
3035 array[key - 1] = tmp;
3036 }
3037 }
3038 }
3039
3040 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) {
3041 const unsigned int usable_count = VM_Version::page_size_count();
3042 if (usable_count == 1) {
3043 return false;
3044 }
3045
3046 // Find the right getpagesizes interface. When solaris 11 is the minimum
3047 // build platform, getpagesizes() (without the '2') can be called directly.
3048 typedef int (*gps_t)(size_t[], int);
3049 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3050 if (gps_func == NULL) {
3051 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3052 if (gps_func == NULL) {
3053 if (warn) {
3054 warning("MPSS is not supported by the operating system.");
3055 }
3056 return false;
3057 }
3058 }
3059
3060 // Fill the array of page sizes.
3061 int n = (*gps_func)(_page_sizes, page_sizes_max);
3062 assert(n > 0, "Solaris bug?");
3063
3064 if (n == page_sizes_max) {
3065 // Add a sentinel value (necessary only if the array was completely filled
3066 // since it is static (zeroed at initialization)).
3067 _page_sizes[--n] = 0;
3068 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3069 }
3070 assert(_page_sizes[n] == 0, "missing sentinel");
3071 trace_page_sizes("available page sizes", _page_sizes, n);
3072
3073 if (n == 1) return false; // Only one page size available.
3074
3075 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3076 // select up to usable_count elements. First sort the array, find the first
3077 // acceptable value, then copy the usable sizes to the top of the array and
3078 // trim the rest. Make sure to include the default page size :-).
3079 //
3080 // A better policy could get rid of the 4M limit by taking the sizes of the
3081 // important VM memory regions (java heap and possibly the code cache) into
3082 // account.
3083 insertion_sort_descending(_page_sizes, n);
3084 const size_t size_limit =
3085 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3086 int beg;
3087 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */;
3088 const int end = MIN2((int)usable_count, n) - 1;
3089 for (int cur = 0; cur < end; ++cur, ++beg) {
3090 _page_sizes[cur] = _page_sizes[beg];
3091 }
3092 _page_sizes[end] = vm_page_size();
3093 _page_sizes[end + 1] = 0;
3094
3095 if (_page_sizes[end] > _page_sizes[end - 1]) {
3096 // Default page size is not the smallest; sort again.
3097 insertion_sort_descending(_page_sizes, end + 1);
3098 }
3099 *page_size = _page_sizes[0];
3100
3101 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3102 return true;
3103 }
3104
3105 void os::large_page_init() {
3106 if (UseLargePages) {
3107 // print a warning if any large page related flag is specified on command line
3108 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3109 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3110
3111 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3112 }
3113 }
3114
3115 bool os::Solaris::is_valid_page_size(size_t bytes) {
3116 for (int i = 0; _page_sizes[i] != 0; i++) {
3117 if (_page_sizes[i] == bytes) {
3118 return true;
3119 }
3120 }
3121 return false;
3122 }
3123
3124 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) {
3125 assert(is_valid_page_size(align), err_msg(SIZE_FORMAT " is not a valid page size", align));
3126 assert(is_ptr_aligned((void*) start, align),
3127 err_msg(PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align));
3128 assert(is_size_aligned(bytes, align),
3129 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align));
3130
3131 // Signal to OS that we want large pages for addresses
3132 // from addr, addr + bytes
3133 struct memcntl_mha mpss_struct;
3134 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3135 mpss_struct.mha_pagesize = align;
3136 mpss_struct.mha_flags = 0;
3137 // Upon successful completion, memcntl() returns 0
3138 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) {
3139 debug_only(warning("Attempt to use MPSS failed."));
3140 return false;
3141 }
3142 return true;
3143 }
3144
3145 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) {
3146 fatal("os::reserve_memory_special should not be called on Solaris.");
3147 return NULL;
3148 }
3149
3150 bool os::release_memory_special(char* base, size_t bytes) {
3151 fatal("os::release_memory_special should not be called on Solaris.");
3152 return false;
3153 }
3154
3155 size_t os::large_page_size() {
3156 return _large_page_size;
3157 }
3158
3159 // MPSS allows application to commit large page memory on demand; with ISM
3160 // the entire memory region must be allocated as shared memory.
3161 bool os::can_commit_large_page_memory() {
3162 return true;
3163 }
3164
3165 bool os::can_execute_large_page_memory() {
3166 return true;
3167 }
3168
3169 // Read calls from inside the vm need to perform state transitions
3170 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3171 size_t res;
3172 JavaThread* thread = (JavaThread*)Thread::current();
3173 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3174 ThreadBlockInVM tbiv(thread);
3175 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3176 return res;
3177 }
3178
3179 size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) {
3180 size_t res;
3181 JavaThread* thread = (JavaThread*)Thread::current();
3182 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3183 ThreadBlockInVM tbiv(thread);
3184 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res);
3185 return res;
3186 }
3187
3188 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3189 size_t res;
3190 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
3191 "Assumed _thread_in_native");
3192 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3193 return res;
3194 }
3195
3196 void os::naked_short_sleep(jlong ms) {
3197 assert(ms < 1000, "Un-interruptable sleep, short time use only");
3198
3199 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but
3200 // Solaris requires -lrt for this.
3201 usleep((ms * 1000));
3202
3203 return;
3204 }
3205
3206 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3207 void os::infinite_sleep() {
3208 while (true) { // sleep forever ...
3209 ::sleep(100); // ... 100 seconds at a time
3210 }
3211 }
3212
3213 // Used to convert frequent JVM_Yield() to nops
3214 bool os::dont_yield() {
3215 if (DontYieldALot) {
3216 static hrtime_t last_time = 0;
3217 hrtime_t diff = getTimeNanos() - last_time;
3218
3219 if (diff < DontYieldALotInterval * 1000000) {
3220 return true;
3221 }
3222
3223 last_time += diff;
3224
3225 return false;
3226 } else {
3227 return false;
3228 }
3229 }
3230
3231 // Note that yield semantics are defined by the scheduling class to which
3232 // the thread currently belongs. Typically, yield will _not yield to
3233 // other equal or higher priority threads that reside on the dispatch queues
3234 // of other CPUs.
3235
3236 void os::naked_yield() {
3237 thr_yield();
3238 }
3239
3240 // Interface for setting lwp priorities. If we are using T2 libthread,
3241 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3242 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3243 // function is meaningless in this mode so we must adjust the real lwp's priority
3244 // The routines below implement the getting and setting of lwp priorities.
3245 //
3246 // Note: T2 is now the only supported libthread. UseBoundThreads flag is
3247 // being deprecated and all threads are now BoundThreads
3248 //
3249 // Note: There are three priority scales used on Solaris. Java priotities
3250 // which range from 1 to 10, libthread "thr_setprio" scale which range
3251 // from 0 to 127, and the current scheduling class of the process we
3252 // are running in. This is typically from -60 to +60.
3253 // The setting of the lwp priorities in done after a call to thr_setprio
3254 // so Java priorities are mapped to libthread priorities and we map from
3255 // the latter to lwp priorities. We don't keep priorities stored in
3256 // Java priorities since some of our worker threads want to set priorities
3257 // higher than all Java threads.
3258 //
3259 // For related information:
3260 // (1) man -s 2 priocntl
3261 // (2) man -s 4 priocntl
3262 // (3) man dispadmin
3263 // = librt.so
3264 // = libthread/common/rtsched.c - thrp_setlwpprio().
3265 // = ps -cL <pid> ... to validate priority.
3266 // = sched_get_priority_min and _max
3267 // pthread_create
3268 // sched_setparam
3269 // pthread_setschedparam
3270 //
3271 // Assumptions:
3272 // + We assume that all threads in the process belong to the same
3273 // scheduling class. IE. an homogenous process.
3274 // + Must be root or in IA group to change change "interactive" attribute.
3275 // Priocntl() will fail silently. The only indication of failure is when
3276 // we read-back the value and notice that it hasn't changed.
3277 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3278 // + For RT, change timeslice as well. Invariant:
3279 // constant "priority integral"
3280 // Konst == TimeSlice * (60-Priority)
3281 // Given a priority, compute appropriate timeslice.
3282 // + Higher numerical values have higher priority.
3283
3284 // sched class attributes
3285 typedef struct {
3286 int schedPolicy; // classID
3287 int maxPrio;
3288 int minPrio;
3289 } SchedInfo;
3290
3291
3292 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3293
3294 #ifdef ASSERT
3295 static int ReadBackValidate = 1;
3296 #endif
3297 static int myClass = 0;
3298 static int myMin = 0;
3299 static int myMax = 0;
3300 static int myCur = 0;
3301 static bool priocntl_enable = false;
3302
3303 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3304 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3305
3306
3307 // lwp_priocntl_init
3308 //
3309 // Try to determine the priority scale for our process.
3310 //
3311 // Return errno or 0 if OK.
3312 //
3313 static int lwp_priocntl_init() {
3314 int rslt;
3315 pcinfo_t ClassInfo;
3316 pcparms_t ParmInfo;
3317 int i;
3318
3319 if (!UseThreadPriorities) return 0;
3320
3321 // If ThreadPriorityPolicy is 1, switch tables
3322 if (ThreadPriorityPolicy == 1) {
3323 for (i = 0; i < CriticalPriority+1; i++)
3324 os::java_to_os_priority[i] = prio_policy1[i];
3325 }
3326 if (UseCriticalJavaThreadPriority) {
3327 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3328 // See set_native_priority() and set_lwp_class_and_priority().
3329 // Save original MaxPriority mapping in case attempt to
3330 // use critical priority fails.
3331 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3332 // Set negative to distinguish from other priorities
3333 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3334 }
3335
3336 // Get IDs for a set of well-known scheduling classes.
3337 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3338 // the system. We should have a loop that iterates over the
3339 // classID values, which are known to be "small" integers.
3340
3341 strcpy(ClassInfo.pc_clname, "TS");
3342 ClassInfo.pc_cid = -1;
3343 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3344 if (rslt < 0) return errno;
3345 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3346 tsLimits.schedPolicy = ClassInfo.pc_cid;
3347 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3348 tsLimits.minPrio = -tsLimits.maxPrio;
3349
3350 strcpy(ClassInfo.pc_clname, "IA");
3351 ClassInfo.pc_cid = -1;
3352 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3353 if (rslt < 0) return errno;
3354 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3355 iaLimits.schedPolicy = ClassInfo.pc_cid;
3356 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3357 iaLimits.minPrio = -iaLimits.maxPrio;
3358
3359 strcpy(ClassInfo.pc_clname, "RT");
3360 ClassInfo.pc_cid = -1;
3361 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3362 if (rslt < 0) return errno;
3363 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3364 rtLimits.schedPolicy = ClassInfo.pc_cid;
3365 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3366 rtLimits.minPrio = 0;
3367
3368 strcpy(ClassInfo.pc_clname, "FX");
3369 ClassInfo.pc_cid = -1;
3370 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3371 if (rslt < 0) return errno;
3372 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3373 fxLimits.schedPolicy = ClassInfo.pc_cid;
3374 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3375 fxLimits.minPrio = 0;
3376
3377 // Query our "current" scheduling class.
3378 // This will normally be IA, TS or, rarely, FX or RT.
3379 memset(&ParmInfo, 0, sizeof(ParmInfo));
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 myClass = ParmInfo.pc_cid;
3384
3385 // We now know our scheduling classId, get specific information
3386 // about the class.
3387 ClassInfo.pc_cid = myClass;
3388 ClassInfo.pc_clname[0] = 0;
3389 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3390 if (rslt < 0) return errno;
3391
3392 if (ThreadPriorityVerbose) {
3393 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3394 }
3395
3396 memset(&ParmInfo, 0, sizeof(pcparms_t));
3397 ParmInfo.pc_cid = PC_CLNULL;
3398 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3399 if (rslt < 0) return errno;
3400
3401 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3402 myMin = rtLimits.minPrio;
3403 myMax = rtLimits.maxPrio;
3404 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3405 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3406 myMin = iaLimits.minPrio;
3407 myMax = iaLimits.maxPrio;
3408 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3409 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3410 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3411 myMin = tsLimits.minPrio;
3412 myMax = tsLimits.maxPrio;
3413 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3414 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3415 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3416 myMin = fxLimits.minPrio;
3417 myMax = fxLimits.maxPrio;
3418 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3419 } else {
3420 // No clue - punt
3421 if (ThreadPriorityVerbose) {
3422 tty->print_cr("Unknown scheduling class: %s ... \n",
3423 ClassInfo.pc_clname);
3424 }
3425 return EINVAL; // no clue, punt
3426 }
3427
3428 if (ThreadPriorityVerbose) {
3429 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax);
3430 }
3431
3432 priocntl_enable = true; // Enable changing priorities
3433 return 0;
3434 }
3435
3436 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3437 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3438 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3439 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3440
3441
3442 // scale_to_lwp_priority
3443 //
3444 // Convert from the libthread "thr_setprio" scale to our current
3445 // lwp scheduling class scale.
3446 //
3447 static int scale_to_lwp_priority(int rMin, int rMax, int x) {
3448 int v;
3449
3450 if (x == 127) return rMax; // avoid round-down
3451 v = (((x*(rMax-rMin)))/128)+rMin;
3452 return v;
3453 }
3454
3455
3456 // set_lwp_class_and_priority
3457 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3458 int newPrio, int new_class, bool scale) {
3459 int rslt;
3460 int Actual, Expected, prv;
3461 pcparms_t ParmInfo; // for GET-SET
3462 #ifdef ASSERT
3463 pcparms_t ReadBack; // for readback
3464 #endif
3465
3466 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3467 // Query current values.
3468 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3469 // Cache "pcparms_t" in global ParmCache.
3470 // TODO: elide set-to-same-value
3471
3472 // If something went wrong on init, don't change priorities.
3473 if (!priocntl_enable) {
3474 if (ThreadPriorityVerbose) {
3475 tty->print_cr("Trying to set priority but init failed, ignoring");
3476 }
3477 return EINVAL;
3478 }
3479
3480 // If lwp hasn't started yet, just return
3481 // the _start routine will call us again.
3482 if (lwpid <= 0) {
3483 if (ThreadPriorityVerbose) {
3484 tty->print_cr("deferring the set_lwp_class_and_priority of thread "
3485 INTPTR_FORMAT " to %d, lwpid not set",
3486 ThreadID, newPrio);
3487 }
3488 return 0;
3489 }
3490
3491 if (ThreadPriorityVerbose) {
3492 tty->print_cr ("set_lwp_class_and_priority("
3493 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3494 ThreadID, lwpid, newPrio);
3495 }
3496
3497 memset(&ParmInfo, 0, sizeof(pcparms_t));
3498 ParmInfo.pc_cid = PC_CLNULL;
3499 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3500 if (rslt < 0) return errno;
3501
3502 int cur_class = ParmInfo.pc_cid;
3503 ParmInfo.pc_cid = (id_t)new_class;
3504
3505 if (new_class == rtLimits.schedPolicy) {
3506 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3507 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3508 rtLimits.maxPrio, newPrio)
3509 : newPrio;
3510 rtInfo->rt_tqsecs = RT_NOCHANGE;
3511 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3512 if (ThreadPriorityVerbose) {
3513 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3514 }
3515 } else if (new_class == iaLimits.schedPolicy) {
3516 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3517 int maxClamped = MIN2(iaLimits.maxPrio,
3518 cur_class == new_class
3519 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3520 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3521 maxClamped, newPrio)
3522 : newPrio;
3523 iaInfo->ia_uprilim = cur_class == new_class
3524 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3525 iaInfo->ia_mode = IA_NOCHANGE;
3526 if (ThreadPriorityVerbose) {
3527 tty->print_cr("IA: [%d...%d] %d->%d\n",
3528 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3529 }
3530 } else if (new_class == tsLimits.schedPolicy) {
3531 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3532 int maxClamped = MIN2(tsLimits.maxPrio,
3533 cur_class == new_class
3534 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3535 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3536 maxClamped, newPrio)
3537 : newPrio;
3538 tsInfo->ts_uprilim = cur_class == new_class
3539 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3540 if (ThreadPriorityVerbose) {
3541 tty->print_cr("TS: [%d...%d] %d->%d\n",
3542 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3543 }
3544 } else if (new_class == fxLimits.schedPolicy) {
3545 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3546 int maxClamped = MIN2(fxLimits.maxPrio,
3547 cur_class == new_class
3548 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3549 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3550 maxClamped, newPrio)
3551 : newPrio;
3552 fxInfo->fx_uprilim = cur_class == new_class
3553 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
3554 fxInfo->fx_tqsecs = FX_NOCHANGE;
3555 fxInfo->fx_tqnsecs = FX_NOCHANGE;
3556 if (ThreadPriorityVerbose) {
3557 tty->print_cr("FX: [%d...%d] %d->%d\n",
3558 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
3559 }
3560 } else {
3561 if (ThreadPriorityVerbose) {
3562 tty->print_cr("Unknown new scheduling class %d\n", new_class);
3563 }
3564 return EINVAL; // no clue, punt
3565 }
3566
3567 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3568 if (ThreadPriorityVerbose && rslt) {
3569 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3570 }
3571 if (rslt < 0) return errno;
3572
3573 #ifdef ASSERT
3574 // Sanity check: read back what we just attempted to set.
3575 // In theory it could have changed in the interim ...
3576 //
3577 // The priocntl system call is tricky.
3578 // Sometimes it'll validate the priority value argument and
3579 // return EINVAL if unhappy. At other times it fails silently.
3580 // Readbacks are prudent.
3581
3582 if (!ReadBackValidate) return 0;
3583
3584 memset(&ReadBack, 0, sizeof(pcparms_t));
3585 ReadBack.pc_cid = PC_CLNULL;
3586 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3587 assert(rslt >= 0, "priocntl failed");
3588 Actual = Expected = 0xBAD;
3589 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3590 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3591 Actual = RTPRI(ReadBack)->rt_pri;
3592 Expected = RTPRI(ParmInfo)->rt_pri;
3593 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3594 Actual = IAPRI(ReadBack)->ia_upri;
3595 Expected = IAPRI(ParmInfo)->ia_upri;
3596 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3597 Actual = TSPRI(ReadBack)->ts_upri;
3598 Expected = TSPRI(ParmInfo)->ts_upri;
3599 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3600 Actual = FXPRI(ReadBack)->fx_upri;
3601 Expected = FXPRI(ParmInfo)->fx_upri;
3602 } else {
3603 if (ThreadPriorityVerbose) {
3604 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
3605 ParmInfo.pc_cid);
3606 }
3607 }
3608
3609 if (Actual != Expected) {
3610 if (ThreadPriorityVerbose) {
3611 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3612 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3613 }
3614 }
3615 #endif
3616
3617 return 0;
3618 }
3619
3620 // Solaris only gives access to 128 real priorities at a time,
3621 // so we expand Java's ten to fill this range. This would be better
3622 // if we dynamically adjusted relative priorities.
3623 //
3624 // The ThreadPriorityPolicy option allows us to select 2 different
3625 // priority scales.
3626 //
3627 // ThreadPriorityPolicy=0
3628 // Since the Solaris' default priority is MaximumPriority, we do not
3629 // set a priority lower than Max unless a priority lower than
3630 // NormPriority is requested.
3631 //
3632 // ThreadPriorityPolicy=1
3633 // This mode causes the priority table to get filled with
3634 // linear values. NormPriority get's mapped to 50% of the
3635 // Maximum priority an so on. This will cause VM threads
3636 // to get unfair treatment against other Solaris processes
3637 // which do not explicitly alter their thread priorities.
3638
3639 int os::java_to_os_priority[CriticalPriority + 1] = {
3640 -99999, // 0 Entry should never be used
3641
3642 0, // 1 MinPriority
3643 32, // 2
3644 64, // 3
3645
3646 96, // 4
3647 127, // 5 NormPriority
3648 127, // 6
3649
3650 127, // 7
3651 127, // 8
3652 127, // 9 NearMaxPriority
3653
3654 127, // 10 MaxPriority
3655
3656 -criticalPrio // 11 CriticalPriority
3657 };
3658
3659 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3660 OSThread* osthread = thread->osthread();
3661
3662 // Save requested priority in case the thread hasn't been started
3663 osthread->set_native_priority(newpri);
3664
3665 // Check for critical priority request
3666 bool fxcritical = false;
3667 if (newpri == -criticalPrio) {
3668 fxcritical = true;
3669 newpri = criticalPrio;
3670 }
3671
3672 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3673 if (!UseThreadPriorities) return OS_OK;
3674
3675 int status = 0;
3676
3677 if (!fxcritical) {
3678 // Use thr_setprio only if we have a priority that thr_setprio understands
3679 status = thr_setprio(thread->osthread()->thread_id(), newpri);
3680 }
3681
3682 int lwp_status =
3683 set_lwp_class_and_priority(osthread->thread_id(),
3684 osthread->lwp_id(),
3685 newpri,
3686 fxcritical ? fxLimits.schedPolicy : myClass,
3687 !fxcritical);
3688 if (lwp_status != 0 && fxcritical) {
3689 // Try again, this time without changing the scheduling class
3690 newpri = java_MaxPriority_to_os_priority;
3691 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
3692 osthread->lwp_id(),
3693 newpri, myClass, false);
3694 }
3695 status |= lwp_status;
3696 return (status == 0) ? OS_OK : OS_ERR;
3697 }
3698
3699
3700 OSReturn os::get_native_priority(const Thread* const thread,
3701 int *priority_ptr) {
3702 int p;
3703 if (!UseThreadPriorities) {
3704 *priority_ptr = NormalPriority;
3705 return OS_OK;
3706 }
3707 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3708 if (status != 0) {
3709 return OS_ERR;
3710 }
3711 *priority_ptr = p;
3712 return OS_OK;
3713 }
3714
3715
3716 // Hint to the underlying OS that a task switch would not be good.
3717 // Void return because it's a hint and can fail.
3718 void os::hint_no_preempt() {
3719 schedctl_start(schedctl_init());
3720 }
3721
3722 static void resume_clear_context(OSThread *osthread) {
3723 osthread->set_ucontext(NULL);
3724 }
3725
3726 static void suspend_save_context(OSThread *osthread, ucontext_t* context) {
3727 osthread->set_ucontext(context);
3728 }
3729
3730 static Semaphore sr_semaphore;
3731
3732 void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) {
3733 // Save and restore errno to avoid confusing native code with EINTR
3734 // after sigsuspend.
3735 int old_errno = errno;
3736
3737 OSThread* osthread = thread->osthread();
3738 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
3739
3740 os::SuspendResume::State current = osthread->sr.state();
3741 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
3742 suspend_save_context(osthread, uc);
3743
3744 // attempt to switch the state, we assume we had a SUSPEND_REQUEST
3745 os::SuspendResume::State state = osthread->sr.suspended();
3746 if (state == os::SuspendResume::SR_SUSPENDED) {
3747 sigset_t suspend_set; // signals for sigsuspend()
3748
3749 // get current set of blocked signals and unblock resume signal
3750 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set);
3751 sigdelset(&suspend_set, os::Solaris::SIGasync());
3752
3753 sr_semaphore.signal();
3754 // wait here until we are resumed
3755 while (1) {
3756 sigsuspend(&suspend_set);
3757
3758 os::SuspendResume::State result = osthread->sr.running();
3759 if (result == os::SuspendResume::SR_RUNNING) {
3760 sr_semaphore.signal();
3761 break;
3762 }
3763 }
3764
3765 } else if (state == os::SuspendResume::SR_RUNNING) {
3766 // request was cancelled, continue
3767 } else {
3768 ShouldNotReachHere();
3769 }
3770
3771 resume_clear_context(osthread);
3772 } else if (current == os::SuspendResume::SR_RUNNING) {
3773 // request was cancelled, continue
3774 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
3775 // ignore
3776 } else {
3777 // ignore
3778 }
3779
3780 errno = old_errno;
3781 }
3782
3783 void os::print_statistics() {
3784 }
3785
3786 int os::message_box(const char* title, const char* message) {
3787 int i;
3788 fdStream err(defaultStream::error_fd());
3789 for (i = 0; i < 78; i++) err.print_raw("=");
3790 err.cr();
3791 err.print_raw_cr(title);
3792 for (i = 0; i < 78; i++) err.print_raw("-");
3793 err.cr();
3794 err.print_raw_cr(message);
3795 for (i = 0; i < 78; i++) err.print_raw("=");
3796 err.cr();
3797
3798 char buf[16];
3799 // Prevent process from exiting upon "read error" without consuming all CPU
3800 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3801
3802 return buf[0] == 'y' || buf[0] == 'Y';
3803 }
3804
3805 static int sr_notify(OSThread* osthread) {
3806 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync());
3807 assert_status(status == 0, status, "thr_kill");
3808 return status;
3809 }
3810
3811 // "Randomly" selected value for how long we want to spin
3812 // before bailing out on suspending a thread, also how often
3813 // we send a signal to a thread we want to resume
3814 static const int RANDOMLY_LARGE_INTEGER = 1000000;
3815 static const int RANDOMLY_LARGE_INTEGER2 = 100;
3816
3817 static bool do_suspend(OSThread* osthread) {
3818 assert(osthread->sr.is_running(), "thread should be running");
3819 assert(!sr_semaphore.trywait(), "semaphore has invalid state");
3820
3821 // mark as suspended and send signal
3822 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
3823 // failed to switch, state wasn't running?
3824 ShouldNotReachHere();
3825 return false;
3826 }
3827
3828 if (sr_notify(osthread) != 0) {
3829 ShouldNotReachHere();
3830 }
3831
3832 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
3833 while (true) {
3834 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) {
3835 break;
3836 } else {
3837 // timeout
3838 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
3839 if (cancelled == os::SuspendResume::SR_RUNNING) {
3840 return false;
3841 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
3842 // make sure that we consume the signal on the semaphore as well
3843 sr_semaphore.wait();
3844 break;
3845 } else {
3846 ShouldNotReachHere();
3847 return false;
3848 }
3849 }
3850 }
3851
3852 guarantee(osthread->sr.is_suspended(), "Must be suspended");
3853 return true;
3854 }
3855
3856 static void do_resume(OSThread* osthread) {
3857 assert(osthread->sr.is_suspended(), "thread should be suspended");
3858 assert(!sr_semaphore.trywait(), "invalid semaphore state");
3859
3860 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
3861 // failed to switch to WAKEUP_REQUEST
3862 ShouldNotReachHere();
3863 return;
3864 }
3865
3866 while (true) {
3867 if (sr_notify(osthread) == 0) {
3868 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) {
3869 if (osthread->sr.is_running()) {
3870 return;
3871 }
3872 }
3873 } else {
3874 ShouldNotReachHere();
3875 }
3876 }
3877
3878 guarantee(osthread->sr.is_running(), "Must be running!");
3879 }
3880
3881 void os::SuspendedThreadTask::internal_do_task() {
3882 if (do_suspend(_thread->osthread())) {
3883 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
3884 do_task(context);
3885 do_resume(_thread->osthread());
3886 }
3887 }
3888
3889 class PcFetcher : public os::SuspendedThreadTask {
3890 public:
3891 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {}
3892 ExtendedPC result();
3893 protected:
3894 void do_task(const os::SuspendedThreadTaskContext& context);
3895 private:
3896 ExtendedPC _epc;
3897 };
3898
3899 ExtendedPC PcFetcher::result() {
3900 guarantee(is_done(), "task is not done yet.");
3901 return _epc;
3902 }
3903
3904 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) {
3905 Thread* thread = context.thread();
3906 OSThread* osthread = thread->osthread();
3907 if (osthread->ucontext() != NULL) {
3908 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext());
3909 } else {
3910 // NULL context is unexpected, double-check this is the VMThread
3911 guarantee(thread->is_VM_thread(), "can only be called for VMThread");
3912 }
3913 }
3914
3915 // A lightweight implementation that does not suspend the target thread and
3916 // thus returns only a hint. Used for profiling only!
3917 ExtendedPC os::get_thread_pc(Thread* thread) {
3918 // Make sure that it is called by the watcher and the Threads lock is owned.
3919 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
3920 // For now, is only used to profile the VM Thread
3921 assert(thread->is_VM_thread(), "Can only be called for VMThread");
3922 PcFetcher fetcher(thread);
3923 fetcher.run();
3924 return fetcher.result();
3925 }
3926
3927
3928 // This does not do anything on Solaris. This is basically a hook for being
3929 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
3930 void os::os_exception_wrapper(java_call_t f, JavaValue* value,
3931 methodHandle* method, JavaCallArguments* args,
3932 Thread* thread) {
3933 f(value, method, args, thread);
3934 }
3935
3936 // This routine may be used by user applications as a "hook" to catch signals.
3937 // The user-defined signal handler must pass unrecognized signals to this
3938 // routine, and if it returns true (non-zero), then the signal handler must
3939 // return immediately. If the flag "abort_if_unrecognized" is true, then this
3940 // routine will never retun false (zero), but instead will execute a VM panic
3941 // routine kill the process.
3942 //
3943 // If this routine returns false, it is OK to call it again. This allows
3944 // the user-defined signal handler to perform checks either before or after
3945 // the VM performs its own checks. Naturally, the user code would be making
3946 // a serious error if it tried to handle an exception (such as a null check
3947 // or breakpoint) that the VM was generating for its own correct operation.
3948 //
3949 // This routine may recognize any of the following kinds of signals:
3950 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
3951 // os::Solaris::SIGasync
3952 // It should be consulted by handlers for any of those signals.
3953 // It explicitly does not recognize os::Solaris::SIGinterrupt
3954 //
3955 // The caller of this routine must pass in the three arguments supplied
3956 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
3957 // field of the structure passed to sigaction(). This routine assumes that
3958 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
3959 //
3960 // Note that the VM will print warnings if it detects conflicting signal
3961 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
3962 //
3963 extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo,
3964 siginfo_t* siginfo,
3965 void* ucontext,
3966 int abort_if_unrecognized);
3967
3968
3969 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
3970 int orig_errno = errno; // Preserve errno value over signal handler.
3971 JVM_handle_solaris_signal(sig, info, ucVoid, true);
3972 errno = orig_errno;
3973 }
3974
3975 // Do not delete - if guarantee is ever removed, a signal handler (even empty)
3976 // is needed to provoke threads blocked on IO to return an EINTR
3977 // Note: this explicitly does NOT call JVM_handle_solaris_signal and
3978 // does NOT participate in signal chaining due to requirement for
3979 // NOT setting SA_RESTART to make EINTR work.
3980 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
3981 if (UseSignalChaining) {
3982 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
3983 if (actp && actp->sa_handler) {
3984 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
3985 }
3986 }
3987 }
3988
3989 // This boolean allows users to forward their own non-matching signals
3990 // to JVM_handle_solaris_signal, harmlessly.
3991 bool os::Solaris::signal_handlers_are_installed = false;
3992
3993 // For signal-chaining
3994 bool os::Solaris::libjsig_is_loaded = false;
3995 typedef struct sigaction *(*get_signal_t)(int);
3996 get_signal_t os::Solaris::get_signal_action = NULL;
3997
3998 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
3999 struct sigaction *actp = NULL;
4000
4001 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
4002 // Retrieve the old signal handler from libjsig
4003 actp = (*get_signal_action)(sig);
4004 }
4005 if (actp == NULL) {
4006 // Retrieve the preinstalled signal handler from jvm
4007 actp = get_preinstalled_handler(sig);
4008 }
4009
4010 return actp;
4011 }
4012
4013 static bool call_chained_handler(struct sigaction *actp, int sig,
4014 siginfo_t *siginfo, void *context) {
4015 // Call the old signal handler
4016 if (actp->sa_handler == SIG_DFL) {
4017 // It's more reasonable to let jvm treat it as an unexpected exception
4018 // instead of taking the default action.
4019 return false;
4020 } else if (actp->sa_handler != SIG_IGN) {
4021 if ((actp->sa_flags & SA_NODEFER) == 0) {
4022 // automaticlly block the signal
4023 sigaddset(&(actp->sa_mask), sig);
4024 }
4025
4026 sa_handler_t hand;
4027 sa_sigaction_t sa;
4028 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4029 // retrieve the chained handler
4030 if (siginfo_flag_set) {
4031 sa = actp->sa_sigaction;
4032 } else {
4033 hand = actp->sa_handler;
4034 }
4035
4036 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4037 actp->sa_handler = SIG_DFL;
4038 }
4039
4040 // try to honor the signal mask
4041 sigset_t oset;
4042 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4043
4044 // call into the chained handler
4045 if (siginfo_flag_set) {
4046 (*sa)(sig, siginfo, context);
4047 } else {
4048 (*hand)(sig);
4049 }
4050
4051 // restore the signal mask
4052 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4053 }
4054 // Tell jvm's signal handler the signal is taken care of.
4055 return true;
4056 }
4057
4058 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4059 bool chained = false;
4060 // signal-chaining
4061 if (UseSignalChaining) {
4062 struct sigaction *actp = get_chained_signal_action(sig);
4063 if (actp != NULL) {
4064 chained = call_chained_handler(actp, sig, siginfo, context);
4065 }
4066 }
4067 return chained;
4068 }
4069
4070 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4071 assert((chainedsigactions != (struct sigaction *)NULL) &&
4072 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4073 if (preinstalled_sigs[sig] != 0) {
4074 return &chainedsigactions[sig];
4075 }
4076 return NULL;
4077 }
4078
4079 void os::Solaris::save_preinstalled_handler(int sig,
4080 struct sigaction& oldAct) {
4081 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4082 assert((chainedsigactions != (struct sigaction *)NULL) &&
4083 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4084 chainedsigactions[sig] = oldAct;
4085 preinstalled_sigs[sig] = 1;
4086 }
4087
4088 void os::Solaris::set_signal_handler(int sig, bool set_installed,
4089 bool oktochain) {
4090 // Check for overwrite.
4091 struct sigaction oldAct;
4092 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4093 void* oldhand =
4094 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4095 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4096 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4097 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4098 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4099 if (AllowUserSignalHandlers || !set_installed) {
4100 // Do not overwrite; user takes responsibility to forward to us.
4101 return;
4102 } else if (UseSignalChaining) {
4103 if (oktochain) {
4104 // save the old handler in jvm
4105 save_preinstalled_handler(sig, oldAct);
4106 } else {
4107 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4108 }
4109 // libjsig also interposes the sigaction() call below and saves the
4110 // old sigaction on it own.
4111 } else {
4112 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4113 "%#lx for signal %d.", (long)oldhand, sig));
4114 }
4115 }
4116
4117 struct sigaction sigAct;
4118 sigfillset(&(sigAct.sa_mask));
4119 sigAct.sa_handler = SIG_DFL;
4120
4121 sigAct.sa_sigaction = signalHandler;
4122 // Handle SIGSEGV on alternate signal stack if
4123 // not using stack banging
4124 if (!UseStackBanging && sig == SIGSEGV) {
4125 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4126 } else if (sig == os::Solaris::SIGinterrupt()) {
4127 // Interruptible i/o requires SA_RESTART cleared so EINTR
4128 // is returned instead of restarting system calls
4129 sigemptyset(&sigAct.sa_mask);
4130 sigAct.sa_handler = NULL;
4131 sigAct.sa_flags = SA_SIGINFO;
4132 sigAct.sa_sigaction = sigINTRHandler;
4133 } else {
4134 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4135 }
4136 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4137
4138 sigaction(sig, &sigAct, &oldAct);
4139
4140 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4141 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4142 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4143 }
4144
4145
4146 #define DO_SIGNAL_CHECK(sig) \
4147 do { \
4148 if (!sigismember(&check_signal_done, sig)) { \
4149 os::Solaris::check_signal_handler(sig); \
4150 } \
4151 } while (0)
4152
4153 // This method is a periodic task to check for misbehaving JNI applications
4154 // under CheckJNI, we can add any periodic checks here
4155
4156 void os::run_periodic_checks() {
4157 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4158 // thereby preventing a NULL checks.
4159 if (!check_addr0_done) check_addr0_done = check_addr0(tty);
4160
4161 if (check_signals == false) return;
4162
4163 // SEGV and BUS if overridden could potentially prevent
4164 // generation of hs*.log in the event of a crash, debugging
4165 // such a case can be very challenging, so we absolutely
4166 // check for the following for a good measure:
4167 DO_SIGNAL_CHECK(SIGSEGV);
4168 DO_SIGNAL_CHECK(SIGILL);
4169 DO_SIGNAL_CHECK(SIGFPE);
4170 DO_SIGNAL_CHECK(SIGBUS);
4171 DO_SIGNAL_CHECK(SIGPIPE);
4172 DO_SIGNAL_CHECK(SIGXFSZ);
4173
4174 // ReduceSignalUsage allows the user to override these handlers
4175 // see comments at the very top and jvm_solaris.h
4176 if (!ReduceSignalUsage) {
4177 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4178 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4179 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4180 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4181 }
4182
4183 // See comments above for using JVM1/JVM2 and UseAltSigs
4184 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4185 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4186
4187 }
4188
4189 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4190
4191 static os_sigaction_t os_sigaction = NULL;
4192
4193 void os::Solaris::check_signal_handler(int sig) {
4194 char buf[O_BUFLEN];
4195 address jvmHandler = NULL;
4196
4197 struct sigaction act;
4198 if (os_sigaction == NULL) {
4199 // only trust the default sigaction, in case it has been interposed
4200 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4201 if (os_sigaction == NULL) return;
4202 }
4203
4204 os_sigaction(sig, (struct sigaction*)NULL, &act);
4205
4206 address thisHandler = (act.sa_flags & SA_SIGINFO)
4207 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4208 : CAST_FROM_FN_PTR(address, act.sa_handler);
4209
4210
4211 switch (sig) {
4212 case SIGSEGV:
4213 case SIGBUS:
4214 case SIGFPE:
4215 case SIGPIPE:
4216 case SIGXFSZ:
4217 case SIGILL:
4218 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4219 break;
4220
4221 case SHUTDOWN1_SIGNAL:
4222 case SHUTDOWN2_SIGNAL:
4223 case SHUTDOWN3_SIGNAL:
4224 case BREAK_SIGNAL:
4225 jvmHandler = (address)user_handler();
4226 break;
4227
4228 default:
4229 int intrsig = os::Solaris::SIGinterrupt();
4230 int asynsig = os::Solaris::SIGasync();
4231
4232 if (sig == intrsig) {
4233 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4234 } else if (sig == asynsig) {
4235 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4236 } else {
4237 return;
4238 }
4239 break;
4240 }
4241
4242
4243 if (thisHandler != jvmHandler) {
4244 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4245 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4246 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4247 // No need to check this sig any longer
4248 sigaddset(&check_signal_done, sig);
4249 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN
4250 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) {
4251 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell",
4252 exception_name(sig, buf, O_BUFLEN));
4253 }
4254 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4255 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4256 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4257 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4258 // No need to check this sig any longer
4259 sigaddset(&check_signal_done, sig);
4260 }
4261
4262 // Print all the signal handler state
4263 if (sigismember(&check_signal_done, sig)) {
4264 print_signal_handlers(tty, buf, O_BUFLEN);
4265 }
4266
4267 }
4268
4269 void os::Solaris::install_signal_handlers() {
4270 bool libjsigdone = false;
4271 signal_handlers_are_installed = true;
4272
4273 // signal-chaining
4274 typedef void (*signal_setting_t)();
4275 signal_setting_t begin_signal_setting = NULL;
4276 signal_setting_t end_signal_setting = NULL;
4277 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4278 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4279 if (begin_signal_setting != NULL) {
4280 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4281 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4282 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4283 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4284 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4285 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4286 libjsig_is_loaded = true;
4287 if (os::Solaris::get_libjsig_version != NULL) {
4288 libjsigversion = (*os::Solaris::get_libjsig_version)();
4289 }
4290 assert(UseSignalChaining, "should enable signal-chaining");
4291 }
4292 if (libjsig_is_loaded) {
4293 // Tell libjsig jvm is setting signal handlers
4294 (*begin_signal_setting)();
4295 }
4296
4297 set_signal_handler(SIGSEGV, true, true);
4298 set_signal_handler(SIGPIPE, true, true);
4299 set_signal_handler(SIGXFSZ, true, true);
4300 set_signal_handler(SIGBUS, true, true);
4301 set_signal_handler(SIGILL, true, true);
4302 set_signal_handler(SIGFPE, true, true);
4303
4304
4305 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4306
4307 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4308 // can not register overridable signals which might be > 32
4309 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4310 // Tell libjsig jvm has finished setting signal handlers
4311 (*end_signal_setting)();
4312 libjsigdone = true;
4313 }
4314 }
4315
4316 // Never ok to chain our SIGinterrupt
4317 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4318 set_signal_handler(os::Solaris::SIGasync(), true, true);
4319
4320 if (libjsig_is_loaded && !libjsigdone) {
4321 // Tell libjsig jvm finishes setting signal handlers
4322 (*end_signal_setting)();
4323 }
4324
4325 // We don't activate signal checker if libjsig is in place, we trust ourselves
4326 // and if UserSignalHandler is installed all bets are off.
4327 // Log that signal checking is off only if -verbose:jni is specified.
4328 if (CheckJNICalls) {
4329 if (libjsig_is_loaded) {
4330 if (PrintJNIResolving) {
4331 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4332 }
4333 check_signals = false;
4334 }
4335 if (AllowUserSignalHandlers) {
4336 if (PrintJNIResolving) {
4337 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4338 }
4339 check_signals = false;
4340 }
4341 }
4342 }
4343
4344
4345 void report_error(const char* file_name, int line_no, const char* title,
4346 const char* format, ...);
4347
4348 const char * signames[] = {
4349 "SIG0",
4350 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4351 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4352 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4353 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4354 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4355 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4356 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4357 "SIGCANCEL", "SIGLOST"
4358 };
4359
4360 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4361 if (0 < exception_code && exception_code <= SIGRTMAX) {
4362 // signal
4363 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4364 jio_snprintf(buf, size, "%s", signames[exception_code]);
4365 } else {
4366 jio_snprintf(buf, size, "SIG%d", exception_code);
4367 }
4368 return buf;
4369 } else {
4370 return NULL;
4371 }
4372 }
4373
4374 // (Static) wrapper for getisax(2) call.
4375 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4376
4377 // (Static) wrappers for the liblgrp API
4378 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4379 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4380 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4381 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4382 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4383 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4384 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4385 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4386 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4387
4388 // (Static) wrapper for meminfo() call.
4389 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4390
4391 static address resolve_symbol_lazy(const char* name) {
4392 address addr = (address) dlsym(RTLD_DEFAULT, name);
4393 if (addr == NULL) {
4394 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4395 addr = (address) dlsym(RTLD_NEXT, name);
4396 }
4397 return addr;
4398 }
4399
4400 static address resolve_symbol(const char* name) {
4401 address addr = resolve_symbol_lazy(name);
4402 if (addr == NULL) {
4403 fatal(dlerror());
4404 }
4405 return addr;
4406 }
4407
4408 void os::Solaris::libthread_init() {
4409 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4410
4411 lwp_priocntl_init();
4412
4413 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4414 if (func == NULL) {
4415 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4416 // Guarantee that this VM is running on an new enough OS (5.6 or
4417 // later) that it will have a new enough libthread.so.
4418 guarantee(func != NULL, "libthread.so is too old.");
4419 }
4420
4421 int size;
4422 void (*handler_info_func)(address *, int *);
4423 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4424 handler_info_func(&handler_start, &size);
4425 handler_end = handler_start + size;
4426 }
4427
4428
4429 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4430 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4431 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4432 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4433 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4434 int os::Solaris::_mutex_scope = USYNC_THREAD;
4435
4436 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4437 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4438 int_fnP_cond_tP os::Solaris::_cond_signal;
4439 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4440 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4441 int_fnP_cond_tP os::Solaris::_cond_destroy;
4442 int os::Solaris::_cond_scope = USYNC_THREAD;
4443
4444 void os::Solaris::synchronization_init() {
4445 if (UseLWPSynchronization) {
4446 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4447 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4448 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4449 os::Solaris::set_mutex_init(lwp_mutex_init);
4450 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4451 os::Solaris::set_mutex_scope(USYNC_THREAD);
4452
4453 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4454 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4455 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4456 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4457 os::Solaris::set_cond_init(lwp_cond_init);
4458 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4459 os::Solaris::set_cond_scope(USYNC_THREAD);
4460 } else {
4461 os::Solaris::set_mutex_scope(USYNC_THREAD);
4462 os::Solaris::set_cond_scope(USYNC_THREAD);
4463
4464 if (UsePthreads) {
4465 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4466 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4467 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4468 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4469 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4470
4471 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4472 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4473 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4474 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4475 os::Solaris::set_cond_init(pthread_cond_default_init);
4476 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4477 } else {
4478 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4479 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4480 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4481 os::Solaris::set_mutex_init(::mutex_init);
4482 os::Solaris::set_mutex_destroy(::mutex_destroy);
4483
4484 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4485 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4486 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4487 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4488 os::Solaris::set_cond_init(::cond_init);
4489 os::Solaris::set_cond_destroy(::cond_destroy);
4490 }
4491 }
4492 }
4493
4494 bool os::Solaris::liblgrp_init() {
4495 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4496 if (handle != NULL) {
4497 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4498 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4499 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4500 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4501 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4502 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4503 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4504 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4505 dlsym(handle, "lgrp_cookie_stale")));
4506
4507 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4508 set_lgrp_cookie(c);
4509 return true;
4510 }
4511 return false;
4512 }
4513
4514 void os::Solaris::misc_sym_init() {
4515 address func;
4516
4517 // getisax
4518 func = resolve_symbol_lazy("getisax");
4519 if (func != NULL) {
4520 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4521 }
4522
4523 // meminfo
4524 func = resolve_symbol_lazy("meminfo");
4525 if (func != NULL) {
4526 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4527 }
4528 }
4529
4530 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4531 assert(_getisax != NULL, "_getisax not set");
4532 return _getisax(array, n);
4533 }
4534
4535 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4536 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4537 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4538
4539 void init_pset_getloadavg_ptr(void) {
4540 pset_getloadavg_ptr =
4541 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4542 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4543 warning("pset_getloadavg function not found");
4544 }
4545 }
4546
4547 int os::Solaris::_dev_zero_fd = -1;
4548
4549 // this is called _before_ the global arguments have been parsed
4550 void os::init(void) {
4551 _initial_pid = getpid();
4552
4553 max_hrtime = first_hrtime = gethrtime();
4554
4555 init_random(1234567);
4556
4557 page_size = sysconf(_SC_PAGESIZE);
4558 if (page_size == -1) {
4559 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4560 strerror(errno)));
4561 }
4562 init_page_sizes((size_t) page_size);
4563
4564 Solaris::initialize_system_info();
4565
4566 // Initialize misc. symbols as soon as possible, so we can use them
4567 // if we need them.
4568 Solaris::misc_sym_init();
4569
4570 int fd = ::open("/dev/zero", O_RDWR);
4571 if (fd < 0) {
4572 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
4573 } else {
4574 Solaris::set_dev_zero_fd(fd);
4575
4576 // Close on exec, child won't inherit.
4577 fcntl(fd, F_SETFD, FD_CLOEXEC);
4578 }
4579
4580 clock_tics_per_sec = CLK_TCK;
4581
4582 // check if dladdr1() exists; dladdr1 can provide more information than
4583 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4584 // and is available on linker patches for 5.7 and 5.8.
4585 // libdl.so must have been loaded, this call is just an entry lookup
4586 void * hdl = dlopen("libdl.so", RTLD_NOW);
4587 if (hdl) {
4588 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4589 }
4590
4591 // (Solaris only) this switches to calls that actually do locking.
4592 ThreadCritical::initialize();
4593
4594 main_thread = thr_self();
4595
4596 // Constant minimum stack size allowed. It must be at least
4597 // the minimum of what the OS supports (thr_min_stack()), and
4598 // enough to allow the thread to get to user bytecode execution.
4599 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4600 // If the pagesize of the VM is greater than 8K determine the appropriate
4601 // number of initial guard pages. The user can change this with the
4602 // command line arguments, if needed.
4603 if (vm_page_size() > 8*K) {
4604 StackYellowPages = 1;
4605 StackRedPages = 1;
4606 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4607 }
4608 }
4609
4610 // To install functions for atexit system call
4611 extern "C" {
4612 static void perfMemory_exit_helper() {
4613 perfMemory_exit();
4614 }
4615 }
4616
4617 // this is called _after_ the global arguments have been parsed
4618 jint os::init_2(void) {
4619 // try to enable extended file IO ASAP, see 6431278
4620 os::Solaris::try_enable_extended_io();
4621
4622 // Allocate a single page and mark it as readable for safepoint polling. Also
4623 // use this first mmap call to check support for MAP_ALIGN.
4624 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4625 page_size,
4626 MAP_PRIVATE | MAP_ALIGN,
4627 PROT_READ);
4628 if (polling_page == NULL) {
4629 has_map_align = false;
4630 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4631 PROT_READ);
4632 }
4633
4634 os::set_polling_page(polling_page);
4635
4636 #ifndef PRODUCT
4637 if (Verbose && PrintMiscellaneous) {
4638 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n",
4639 (intptr_t)polling_page);
4640 }
4641 #endif
4642
4643 if (!UseMembar) {
4644 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE);
4645 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page");
4646 os::set_memory_serialize_page(mem_serialize_page);
4647
4648 #ifndef PRODUCT
4649 if (Verbose && PrintMiscellaneous) {
4650 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n",
4651 (intptr_t)mem_serialize_page);
4652 }
4653 #endif
4654 }
4655
4656 // Check minimum allowable stack size for thread creation and to initialize
4657 // the java system classes, including StackOverflowError - depends on page
4658 // size. Add a page for compiler2 recursion in main thread.
4659 // Add in 2*BytesPerWord times page size to account for VM stack during
4660 // class initialization depending on 32 or 64 bit VM.
4661 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
4662 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
4663 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
4664
4665 size_t threadStackSizeInBytes = ThreadStackSize * K;
4666 if (threadStackSizeInBytes != 0 &&
4667 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
4668 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
4669 os::Solaris::min_stack_allowed/K);
4670 return JNI_ERR;
4671 }
4672
4673 // For 64kbps there will be a 64kb page size, which makes
4674 // the usable default stack size quite a bit less. Increase the
4675 // stack for 64kb (or any > than 8kb) pages, this increases
4676 // virtual memory fragmentation (since we're not creating the
4677 // stack on a power of 2 boundary. The real fix for this
4678 // should be to fix the guard page mechanism.
4679
4680 if (vm_page_size() > 8*K) {
4681 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
4682 ? threadStackSizeInBytes +
4683 ((StackYellowPages + StackRedPages) * vm_page_size())
4684 : 0;
4685 ThreadStackSize = threadStackSizeInBytes/K;
4686 }
4687
4688 // Make the stack size a multiple of the page size so that
4689 // the yellow/red zones can be guarded.
4690 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
4691 vm_page_size()));
4692
4693 Solaris::libthread_init();
4694
4695 if (UseNUMA) {
4696 if (!Solaris::liblgrp_init()) {
4697 UseNUMA = false;
4698 } else {
4699 size_t lgrp_limit = os::numa_get_groups_num();
4700 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
4701 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4702 FREE_C_HEAP_ARRAY(int, lgrp_ids);
4703 if (lgrp_num < 2) {
4704 // There's only one locality group, disable NUMA.
4705 UseNUMA = false;
4706 }
4707 }
4708 if (!UseNUMA && ForceNUMA) {
4709 UseNUMA = true;
4710 }
4711 }
4712
4713 Solaris::signal_sets_init();
4714 Solaris::init_signal_mem();
4715 Solaris::install_signal_handlers();
4716
4717 if (libjsigversion < JSIG_VERSION_1_4_1) {
4718 Maxlibjsigsigs = OLDMAXSIGNUM;
4719 }
4720
4721 // initialize synchronization primitives to use either thread or
4722 // lwp synchronization (controlled by UseLWPSynchronization)
4723 Solaris::synchronization_init();
4724
4725 if (MaxFDLimit) {
4726 // set the number of file descriptors to max. print out error
4727 // if getrlimit/setrlimit fails but continue regardless.
4728 struct rlimit nbr_files;
4729 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4730 if (status != 0) {
4731 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4732 perror("os::init_2 getrlimit failed");
4733 }
4734 } else {
4735 nbr_files.rlim_cur = nbr_files.rlim_max;
4736 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4737 if (status != 0) {
4738 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4739 perror("os::init_2 setrlimit failed");
4740 }
4741 }
4742 }
4743 }
4744
4745 // Calculate theoretical max. size of Threads to guard gainst
4746 // artifical out-of-memory situations, where all available address-
4747 // space has been reserved by thread stacks. Default stack size is 1Mb.
4748 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
4749 JavaThread::stack_size_at_create() : (1*K*K);
4750 assert(pre_thread_stack_size != 0, "Must have a stack");
4751 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
4752 // we should start doing Virtual Memory banging. Currently when the threads will
4753 // have used all but 200Mb of space.
4754 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
4755 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
4756
4757 // at-exit methods are called in the reverse order of their registration.
4758 // In Solaris 7 and earlier, atexit functions are called on return from
4759 // main or as a result of a call to exit(3C). There can be only 32 of
4760 // these functions registered and atexit() does not set errno. In Solaris
4761 // 8 and later, there is no limit to the number of functions registered
4762 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
4763 // functions are called upon dlclose(3DL) in addition to return from main
4764 // and exit(3C).
4765
4766 if (PerfAllowAtExitRegistration) {
4767 // only register atexit functions if PerfAllowAtExitRegistration is set.
4768 // atexit functions can be delayed until process exit time, which
4769 // can be problematic for embedded VM situations. Embedded VMs should
4770 // call DestroyJavaVM() to assure that VM resources are released.
4771
4772 // note: perfMemory_exit_helper atexit function may be removed in
4773 // the future if the appropriate cleanup code can be added to the
4774 // VM_Exit VMOperation's doit method.
4775 if (atexit(perfMemory_exit_helper) != 0) {
4776 warning("os::init2 atexit(perfMemory_exit_helper) failed");
4777 }
4778 }
4779
4780 // Init pset_loadavg function pointer
4781 init_pset_getloadavg_ptr();
4782
4783 return JNI_OK;
4784 }
4785
4786 // Mark the polling page as unreadable
4787 void os::make_polling_page_unreadable(void) {
4788 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) {
4789 fatal("Could not disable polling page");
4790 }
4791 }
4792
4793 // Mark the polling page as readable
4794 void os::make_polling_page_readable(void) {
4795 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) {
4796 fatal("Could not enable polling page");
4797 }
4798 }
4799
4800 // OS interface.
4801
4802 bool os::check_heap(bool force) { return true; }
4803
4804 // Is a (classpath) directory empty?
4805 bool os::dir_is_empty(const char* path) {
4806 DIR *dir = NULL;
4807 struct dirent *ptr;
4808
4809 dir = opendir(path);
4810 if (dir == NULL) return true;
4811
4812 // Scan the directory
4813 bool result = true;
4814 char buf[sizeof(struct dirent) + MAX_PATH];
4815 struct dirent *dbuf = (struct dirent *) buf;
4816 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
4817 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
4818 result = false;
4819 }
4820 }
4821 closedir(dir);
4822 return result;
4823 }
4824
4825 // This code originates from JDK's sysOpen and open64_w
4826 // from src/solaris/hpi/src/system_md.c
4827
4828 int os::open(const char *path, int oflag, int mode) {
4829 if (strlen(path) > MAX_PATH - 1) {
4830 errno = ENAMETOOLONG;
4831 return -1;
4832 }
4833 int fd;
4834
4835 fd = ::open64(path, oflag, mode);
4836 if (fd == -1) return -1;
4837
4838 // If the open succeeded, the file might still be a directory
4839 {
4840 struct stat64 buf64;
4841 int ret = ::fstat64(fd, &buf64);
4842 int st_mode = buf64.st_mode;
4843
4844 if (ret != -1) {
4845 if ((st_mode & S_IFMT) == S_IFDIR) {
4846 errno = EISDIR;
4847 ::close(fd);
4848 return -1;
4849 }
4850 } else {
4851 ::close(fd);
4852 return -1;
4853 }
4854 }
4855
4856 // 32-bit Solaris systems suffer from:
4857 //
4858 // - an historical default soft limit of 256 per-process file
4859 // descriptors that is too low for many Java programs.
4860 //
4861 // - a design flaw where file descriptors created using stdio
4862 // fopen must be less than 256, _even_ when the first limit above
4863 // has been raised. This can cause calls to fopen (but not calls to
4864 // open, for example) to fail mysteriously, perhaps in 3rd party
4865 // native code (although the JDK itself uses fopen). One can hardly
4866 // criticize them for using this most standard of all functions.
4867 //
4868 // We attempt to make everything work anyways by:
4869 //
4870 // - raising the soft limit on per-process file descriptors beyond
4871 // 256
4872 //
4873 // - As of Solaris 10u4, we can request that Solaris raise the 256
4874 // stdio fopen limit by calling function enable_extended_FILE_stdio.
4875 // This is done in init_2 and recorded in enabled_extended_FILE_stdio
4876 //
4877 // - If we are stuck on an old (pre 10u4) Solaris system, we can
4878 // workaround the bug by remapping non-stdio file descriptors below
4879 // 256 to ones beyond 256, which is done below.
4880 //
4881 // See:
4882 // 1085341: 32-bit stdio routines should support file descriptors >255
4883 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files
4884 // 6431278: Netbeans crash on 32 bit Solaris: need to call
4885 // enable_extended_FILE_stdio() in VM initialisation
4886 // Giri Mandalika's blog
4887 // http://technopark02.blogspot.com/2005_05_01_archive.html
4888 //
4889 #ifndef _LP64
4890 if ((!enabled_extended_FILE_stdio) && fd < 256) {
4891 int newfd = ::fcntl(fd, F_DUPFD, 256);
4892 if (newfd != -1) {
4893 ::close(fd);
4894 fd = newfd;
4895 }
4896 }
4897 #endif // 32-bit Solaris
4898
4899 // All file descriptors that are opened in the JVM and not
4900 // specifically destined for a subprocess should have the
4901 // close-on-exec flag set. If we don't set it, then careless 3rd
4902 // party native code might fork and exec without closing all
4903 // appropriate file descriptors (e.g. as we do in closeDescriptors in
4904 // UNIXProcess.c), and this in turn might:
4905 //
4906 // - cause end-of-file to fail to be detected on some file
4907 // descriptors, resulting in mysterious hangs, or
4908 //
4909 // - might cause an fopen in the subprocess to fail on a system
4910 // suffering from bug 1085341.
4911 //
4912 // (Yes, the default setting of the close-on-exec flag is a Unix
4913 // design flaw)
4914 //
4915 // See:
4916 // 1085341: 32-bit stdio routines should support file descriptors >255
4917 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed
4918 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
4919 //
4920 #ifdef FD_CLOEXEC
4921 {
4922 int flags = ::fcntl(fd, F_GETFD);
4923 if (flags != -1) {
4924 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
4925 }
4926 }
4927 #endif
4928
4929 return fd;
4930 }
4931
4932 // create binary file, rewriting existing file if required
4933 int os::create_binary_file(const char* path, bool rewrite_existing) {
4934 int oflags = O_WRONLY | O_CREAT;
4935 if (!rewrite_existing) {
4936 oflags |= O_EXCL;
4937 }
4938 return ::open64(path, oflags, S_IREAD | S_IWRITE);
4939 }
4940
4941 // return current position of file pointer
4942 jlong os::current_file_offset(int fd) {
4943 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
4944 }
4945
4946 // move file pointer to the specified offset
4947 jlong os::seek_to_file_offset(int fd, jlong offset) {
4948 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
4949 }
4950
4951 jlong os::lseek(int fd, jlong offset, int whence) {
4952 return (jlong) ::lseek64(fd, offset, whence);
4953 }
4954
4955 char * os::native_path(char *path) {
4956 return path;
4957 }
4958
4959 int os::ftruncate(int fd, jlong length) {
4960 return ::ftruncate64(fd, length);
4961 }
4962
4963 int os::fsync(int fd) {
4964 RESTARTABLE_RETURN_INT(::fsync(fd));
4965 }
4966
4967 int os::available(int fd, jlong *bytes) {
4968 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
4969 "Assumed _thread_in_native");
4970 jlong cur, end;
4971 int mode;
4972 struct stat64 buf64;
4973
4974 if (::fstat64(fd, &buf64) >= 0) {
4975 mode = buf64.st_mode;
4976 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
4977 int n,ioctl_return;
4978
4979 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return);
4980 if (ioctl_return>= 0) {
4981 *bytes = n;
4982 return 1;
4983 }
4984 }
4985 }
4986 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
4987 return 0;
4988 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
4989 return 0;
4990 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
4991 return 0;
4992 }
4993 *bytes = end - cur;
4994 return 1;
4995 }
4996
4997 // Map a block of memory.
4998 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
4999 char *addr, size_t bytes, bool read_only,
5000 bool allow_exec) {
5001 int prot;
5002 int flags;
5003
5004 if (read_only) {
5005 prot = PROT_READ;
5006 flags = MAP_SHARED;
5007 } else {
5008 prot = PROT_READ | PROT_WRITE;
5009 flags = MAP_PRIVATE;
5010 }
5011
5012 if (allow_exec) {
5013 prot |= PROT_EXEC;
5014 }
5015
5016 if (addr != NULL) {
5017 flags |= MAP_FIXED;
5018 }
5019
5020 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5021 fd, file_offset);
5022 if (mapped_address == MAP_FAILED) {
5023 return NULL;
5024 }
5025 return mapped_address;
5026 }
5027
5028
5029 // Remap a block of memory.
5030 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5031 char *addr, size_t bytes, bool read_only,
5032 bool allow_exec) {
5033 // same as map_memory() on this OS
5034 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5035 allow_exec);
5036 }
5037
5038
5039 // Unmap a block of memory.
5040 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5041 return munmap(addr, bytes) == 0;
5042 }
5043
5044 void os::pause() {
5045 char filename[MAX_PATH];
5046 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5047 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5048 } else {
5049 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5050 }
5051
5052 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5053 if (fd != -1) {
5054 struct stat buf;
5055 ::close(fd);
5056 while (::stat(filename, &buf) == 0) {
5057 (void)::poll(NULL, 0, 100);
5058 }
5059 } else {
5060 jio_fprintf(stderr,
5061 "Could not open pause file '%s', continuing immediately.\n", filename);
5062 }
5063 }
5064
5065 #ifndef PRODUCT
5066 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5067 // Turn this on if you need to trace synch operations.
5068 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5069 // and call record_synch_enable and record_synch_disable
5070 // around the computation of interest.
5071
5072 void record_synch(char* name, bool returning); // defined below
5073
5074 class RecordSynch {
5075 char* _name;
5076 public:
5077 RecordSynch(char* name) :_name(name) { record_synch(_name, false); }
5078 ~RecordSynch() { record_synch(_name, true); }
5079 };
5080
5081 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5082 extern "C" ret name params { \
5083 typedef ret name##_t params; \
5084 static name##_t* implem = NULL; \
5085 static int callcount = 0; \
5086 if (implem == NULL) { \
5087 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5088 if (implem == NULL) fatal(dlerror()); \
5089 } \
5090 ++callcount; \
5091 RecordSynch _rs(#name); \
5092 inner; \
5093 return implem args; \
5094 }
5095 // in dbx, examine callcounts this way:
5096 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5097
5098 #define CHECK_POINTER_OK(p) \
5099 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5100 #define CHECK_MU \
5101 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5102 #define CHECK_CV \
5103 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5104 #define CHECK_P(p) \
5105 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5106
5107 #define CHECK_MUTEX(mutex_op) \
5108 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5109
5110 CHECK_MUTEX( mutex_lock)
5111 CHECK_MUTEX( _mutex_lock)
5112 CHECK_MUTEX( mutex_unlock)
5113 CHECK_MUTEX(_mutex_unlock)
5114 CHECK_MUTEX( mutex_trylock)
5115 CHECK_MUTEX(_mutex_trylock)
5116
5117 #define CHECK_COND(cond_op) \
5118 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV);
5119
5120 CHECK_COND( cond_wait);
5121 CHECK_COND(_cond_wait);
5122 CHECK_COND(_cond_wait_cancel);
5123
5124 #define CHECK_COND2(cond_op) \
5125 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV);
5126
5127 CHECK_COND2( cond_timedwait);
5128 CHECK_COND2(_cond_timedwait);
5129 CHECK_COND2(_cond_timedwait_cancel);
5130
5131 // do the _lwp_* versions too
5132 #define mutex_t lwp_mutex_t
5133 #define cond_t lwp_cond_t
5134 CHECK_MUTEX( _lwp_mutex_lock)
5135 CHECK_MUTEX( _lwp_mutex_unlock)
5136 CHECK_MUTEX( _lwp_mutex_trylock)
5137 CHECK_MUTEX( __lwp_mutex_lock)
5138 CHECK_MUTEX( __lwp_mutex_unlock)
5139 CHECK_MUTEX( __lwp_mutex_trylock)
5140 CHECK_MUTEX(___lwp_mutex_lock)
5141 CHECK_MUTEX(___lwp_mutex_unlock)
5142
5143 CHECK_COND( _lwp_cond_wait);
5144 CHECK_COND( __lwp_cond_wait);
5145 CHECK_COND(___lwp_cond_wait);
5146
5147 CHECK_COND2( _lwp_cond_timedwait);
5148 CHECK_COND2( __lwp_cond_timedwait);
5149 #undef mutex_t
5150 #undef cond_t
5151
5152 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5153 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5154 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5155 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5156 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5157 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5158 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5159 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5160
5161
5162 // recording machinery:
5163
5164 enum { RECORD_SYNCH_LIMIT = 200 };
5165 char* record_synch_name[RECORD_SYNCH_LIMIT];
5166 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5167 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5168 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5169 int record_synch_count = 0;
5170 bool record_synch_enabled = false;
5171
5172 // in dbx, examine recorded data this way:
5173 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5174
5175 void record_synch(char* name, bool returning) {
5176 if (record_synch_enabled) {
5177 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5178 record_synch_name[record_synch_count] = name;
5179 record_synch_returning[record_synch_count] = returning;
5180 record_synch_thread[record_synch_count] = thr_self();
5181 record_synch_arg0ptr[record_synch_count] = &name;
5182 record_synch_count++;
5183 }
5184 // put more checking code here:
5185 // ...
5186 }
5187 }
5188
5189 void record_synch_enable() {
5190 // start collecting trace data, if not already doing so
5191 if (!record_synch_enabled) record_synch_count = 0;
5192 record_synch_enabled = true;
5193 }
5194
5195 void record_synch_disable() {
5196 // stop collecting trace data
5197 record_synch_enabled = false;
5198 }
5199
5200 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5201 #endif // PRODUCT
5202
5203 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5204 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5205 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5206
5207
5208 // JVMTI & JVM monitoring and management support
5209 // The thread_cpu_time() and current_thread_cpu_time() are only
5210 // supported if is_thread_cpu_time_supported() returns true.
5211 // They are not supported on Solaris T1.
5212
5213 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5214 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5215 // of a thread.
5216 //
5217 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5218 // returns the fast estimate available on the platform.
5219
5220 // hrtime_t gethrvtime() return value includes
5221 // user time but does not include system time
5222 jlong os::current_thread_cpu_time() {
5223 return (jlong) gethrvtime();
5224 }
5225
5226 jlong os::thread_cpu_time(Thread *thread) {
5227 // return user level CPU time only to be consistent with
5228 // what current_thread_cpu_time returns.
5229 // thread_cpu_time_info() must be changed if this changes
5230 return os::thread_cpu_time(thread, false /* user time only */);
5231 }
5232
5233 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5234 if (user_sys_cpu_time) {
5235 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5236 } else {
5237 return os::current_thread_cpu_time();
5238 }
5239 }
5240
5241 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5242 char proc_name[64];
5243 int count;
5244 prusage_t prusage;
5245 jlong lwp_time;
5246 int fd;
5247
5248 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5249 getpid(),
5250 thread->osthread()->lwp_id());
5251 fd = ::open(proc_name, O_RDONLY);
5252 if (fd == -1) return -1;
5253
5254 do {
5255 count = ::pread(fd,
5256 (void *)&prusage.pr_utime,
5257 thr_time_size,
5258 thr_time_off);
5259 } while (count < 0 && errno == EINTR);
5260 ::close(fd);
5261 if (count < 0) return -1;
5262
5263 if (user_sys_cpu_time) {
5264 // user + system CPU time
5265 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5266 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5267 (jlong)prusage.pr_stime.tv_nsec +
5268 (jlong)prusage.pr_utime.tv_nsec;
5269 } else {
5270 // user level CPU time only
5271 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5272 (jlong)prusage.pr_utime.tv_nsec;
5273 }
5274
5275 return (lwp_time);
5276 }
5277
5278 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5279 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5280 info_ptr->may_skip_backward = false; // elapsed time not wall time
5281 info_ptr->may_skip_forward = false; // elapsed time not wall time
5282 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5283 }
5284
5285 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5286 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5287 info_ptr->may_skip_backward = false; // elapsed time not wall time
5288 info_ptr->may_skip_forward = false; // elapsed time not wall time
5289 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5290 }
5291
5292 bool os::is_thread_cpu_time_supported() {
5293 return true;
5294 }
5295
5296 // System loadavg support. Returns -1 if load average cannot be obtained.
5297 // Return the load average for our processor set if the primitive exists
5298 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5299 int os::loadavg(double loadavg[], int nelem) {
5300 if (pset_getloadavg_ptr != NULL) {
5301 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5302 } else {
5303 return ::getloadavg(loadavg, nelem);
5304 }
5305 }
5306
5307 //---------------------------------------------------------------------------------
5308
5309 bool os::find(address addr, outputStream* st) {
5310 Dl_info dlinfo;
5311 memset(&dlinfo, 0, sizeof(dlinfo));
5312 if (dladdr(addr, &dlinfo) != 0) {
5313 st->print(PTR_FORMAT ": ", addr);
5314 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
5315 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5316 } else if (dlinfo.dli_fbase != NULL) {
5317 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5318 } else {
5319 st->print("<absolute address>");
5320 }
5321 if (dlinfo.dli_fname != NULL) {
5322 st->print(" in %s", dlinfo.dli_fname);
5323 }
5324 if (dlinfo.dli_fbase != NULL) {
5325 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
5326 }
5327 st->cr();
5328
5329 if (Verbose) {
5330 // decode some bytes around the PC
5331 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size());
5332 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size());
5333 address lowest = (address) dlinfo.dli_sname;
5334 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5335 if (begin < lowest) begin = lowest;
5336 Dl_info dlinfo2;
5337 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
5338 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) {
5339 end = (address) dlinfo2.dli_saddr;
5340 }
5341 Disassembler::decode(begin, end, st);
5342 }
5343 return true;
5344 }
5345 return false;
5346 }
5347
5348 // Following function has been added to support HotSparc's libjvm.so running
5349 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5350 // src/solaris/hpi/native_threads in the EVM codebase.
5351 //
5352 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5353 // libraries and should thus be removed. We will leave it behind for a while
5354 // until we no longer want to able to run on top of 1.3.0 Solaris production
5355 // JDK. See 4341971.
5356
5357 #define STACK_SLACK 0x800
5358
5359 extern "C" {
5360 intptr_t sysThreadAvailableStackWithSlack() {
5361 stack_t st;
5362 intptr_t retval, stack_top;
5363 retval = thr_stksegment(&st);
5364 assert(retval == 0, "incorrect return value from thr_stksegment");
5365 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5366 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5367 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5368 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5369 }
5370 }
5371
5372 // ObjectMonitor park-unpark infrastructure ...
5373 //
5374 // We implement Solaris and Linux PlatformEvents with the
5375 // obvious condvar-mutex-flag triple.
5376 // Another alternative that works quite well is pipes:
5377 // Each PlatformEvent consists of a pipe-pair.
5378 // The thread associated with the PlatformEvent
5379 // calls park(), which reads from the input end of the pipe.
5380 // Unpark() writes into the other end of the pipe.
5381 // The write-side of the pipe must be set NDELAY.
5382 // Unfortunately pipes consume a large # of handles.
5383 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5384 // Using pipes for the 1st few threads might be workable, however.
5385 //
5386 // park() is permitted to return spuriously.
5387 // Callers of park() should wrap the call to park() in
5388 // an appropriate loop. A litmus test for the correct
5389 // usage of park is the following: if park() were modified
5390 // to immediately return 0 your code should still work,
5391 // albeit degenerating to a spin loop.
5392 //
5393 // In a sense, park()-unpark() just provides more polite spinning
5394 // and polling with the key difference over naive spinning being
5395 // that a parked thread needs to be explicitly unparked() in order
5396 // to wake up and to poll the underlying condition.
5397 //
5398 // Assumption:
5399 // Only one parker can exist on an event, which is why we allocate
5400 // them per-thread. Multiple unparkers can coexist.
5401 //
5402 // _Event transitions in park()
5403 // -1 => -1 : illegal
5404 // 1 => 0 : pass - return immediately
5405 // 0 => -1 : block; then set _Event to 0 before returning
5406 //
5407 // _Event transitions in unpark()
5408 // 0 => 1 : just return
5409 // 1 => 1 : just return
5410 // -1 => either 0 or 1; must signal target thread
5411 // That is, we can safely transition _Event from -1 to either
5412 // 0 or 1.
5413 //
5414 // _Event serves as a restricted-range semaphore.
5415 // -1 : thread is blocked, i.e. there is a waiter
5416 // 0 : neutral: thread is running or ready,
5417 // could have been signaled after a wait started
5418 // 1 : signaled - thread is running or ready
5419 //
5420 // Another possible encoding of _Event would be with
5421 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5422 //
5423 // TODO-FIXME: add DTRACE probes for:
5424 // 1. Tx parks
5425 // 2. Ty unparks Tx
5426 // 3. Tx resumes from park
5427
5428
5429 // value determined through experimentation
5430 #define ROUNDINGFIX 11
5431
5432 // utility to compute the abstime argument to timedwait.
5433 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5434
5435 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5436 // millis is the relative timeout time
5437 // abstime will be the absolute timeout time
5438 if (millis < 0) millis = 0;
5439 struct timeval now;
5440 int status = gettimeofday(&now, NULL);
5441 assert(status == 0, "gettimeofday");
5442 jlong seconds = millis / 1000;
5443 jlong max_wait_period;
5444
5445 if (UseLWPSynchronization) {
5446 // forward port of fix for 4275818 (not sleeping long enough)
5447 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5448 // _lwp_cond_timedwait() used a round_down algorithm rather
5449 // than a round_up. For millis less than our roundfactor
5450 // it rounded down to 0 which doesn't meet the spec.
5451 // For millis > roundfactor we may return a bit sooner, but
5452 // since we can not accurately identify the patch level and
5453 // this has already been fixed in Solaris 9 and 8 we will
5454 // leave it alone rather than always rounding down.
5455
5456 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5457 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5458 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5459 max_wait_period = 21000000;
5460 } else {
5461 max_wait_period = 50000000;
5462 }
5463 millis %= 1000;
5464 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5465 seconds = max_wait_period;
5466 }
5467 abstime->tv_sec = now.tv_sec + seconds;
5468 long usec = now.tv_usec + millis * 1000;
5469 if (usec >= 1000000) {
5470 abstime->tv_sec += 1;
5471 usec -= 1000000;
5472 }
5473 abstime->tv_nsec = usec * 1000;
5474 return abstime;
5475 }
5476
5477 void os::PlatformEvent::park() { // AKA: down()
5478 // Transitions for _Event:
5479 // -1 => -1 : illegal
5480 // 1 => 0 : pass - return immediately
5481 // 0 => -1 : block; then set _Event to 0 before returning
5482
5483 // Invariant: Only the thread associated with the Event/PlatformEvent
5484 // may call park().
5485 assert(_nParked == 0, "invariant");
5486
5487 int v;
5488 for (;;) {
5489 v = _Event;
5490 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5491 }
5492 guarantee(v >= 0, "invariant");
5493 if (v == 0) {
5494 // Do this the hard way by blocking ...
5495 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5496 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5497 // Only for SPARC >= V8PlusA
5498 #if defined(__sparc) && defined(COMPILER2)
5499 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5500 #endif
5501 int status = os::Solaris::mutex_lock(_mutex);
5502 assert_status(status == 0, status, "mutex_lock");
5503 guarantee(_nParked == 0, "invariant");
5504 ++_nParked;
5505 while (_Event < 0) {
5506 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5507 // Treat this the same as if the wait was interrupted
5508 // With usr/lib/lwp going to kernel, always handle ETIME
5509 status = os::Solaris::cond_wait(_cond, _mutex);
5510 if (status == ETIME) status = EINTR;
5511 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5512 }
5513 --_nParked;
5514 _Event = 0;
5515 status = os::Solaris::mutex_unlock(_mutex);
5516 assert_status(status == 0, status, "mutex_unlock");
5517 // Paranoia to ensure our locked and lock-free paths interact
5518 // correctly with each other.
5519 OrderAccess::fence();
5520 }
5521 }
5522
5523 int os::PlatformEvent::park(jlong millis) {
5524 // Transitions for _Event:
5525 // -1 => -1 : illegal
5526 // 1 => 0 : pass - return immediately
5527 // 0 => -1 : block; then set _Event to 0 before returning
5528
5529 guarantee(_nParked == 0, "invariant");
5530 int v;
5531 for (;;) {
5532 v = _Event;
5533 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5534 }
5535 guarantee(v >= 0, "invariant");
5536 if (v != 0) return OS_OK;
5537
5538 int ret = OS_TIMEOUT;
5539 timestruc_t abst;
5540 compute_abstime(&abst, millis);
5541
5542 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5543 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5544 // Only for SPARC >= V8PlusA
5545 #if defined(__sparc) && defined(COMPILER2)
5546 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5547 #endif
5548 int status = os::Solaris::mutex_lock(_mutex);
5549 assert_status(status == 0, status, "mutex_lock");
5550 guarantee(_nParked == 0, "invariant");
5551 ++_nParked;
5552 while (_Event < 0) {
5553 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5554 assert_status(status == 0 || status == EINTR ||
5555 status == ETIME || status == ETIMEDOUT,
5556 status, "cond_timedwait");
5557 if (!FilterSpuriousWakeups) break; // previous semantics
5558 if (status == ETIME || status == ETIMEDOUT) break;
5559 // We consume and ignore EINTR and spurious wakeups.
5560 }
5561 --_nParked;
5562 if (_Event >= 0) ret = OS_OK;
5563 _Event = 0;
5564 status = os::Solaris::mutex_unlock(_mutex);
5565 assert_status(status == 0, status, "mutex_unlock");
5566 // Paranoia to ensure our locked and lock-free paths interact
5567 // correctly with each other.
5568 OrderAccess::fence();
5569 return ret;
5570 }
5571
5572 void os::PlatformEvent::unpark() {
5573 // Transitions for _Event:
5574 // 0 => 1 : just return
5575 // 1 => 1 : just return
5576 // -1 => either 0 or 1; must signal target thread
5577 // That is, we can safely transition _Event from -1 to either
5578 // 0 or 1.
5579 // See also: "Semaphores in Plan 9" by Mullender & Cox
5580 //
5581 // Note: Forcing a transition from "-1" to "1" on an unpark() means
5582 // that it will take two back-to-back park() calls for the owning
5583 // thread to block. This has the benefit of forcing a spurious return
5584 // from the first park() call after an unpark() call which will help
5585 // shake out uses of park() and unpark() without condition variables.
5586
5587 if (Atomic::xchg(1, &_Event) >= 0) return;
5588
5589 // If the thread associated with the event was parked, wake it.
5590 // Wait for the thread assoc with the PlatformEvent to vacate.
5591 int status = os::Solaris::mutex_lock(_mutex);
5592 assert_status(status == 0, status, "mutex_lock");
5593 int AnyWaiters = _nParked;
5594 status = os::Solaris::mutex_unlock(_mutex);
5595 assert_status(status == 0, status, "mutex_unlock");
5596 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
5597 if (AnyWaiters != 0) {
5598 // Note that we signal() *after* dropping the lock for "immortal" Events.
5599 // This is safe and avoids a common class of futile wakeups. In rare
5600 // circumstances this can cause a thread to return prematurely from
5601 // cond_{timed}wait() but the spurious wakeup is benign and the victim
5602 // will simply re-test the condition and re-park itself.
5603 // This provides particular benefit if the underlying platform does not
5604 // provide wait morphing.
5605 status = os::Solaris::cond_signal(_cond);
5606 assert_status(status == 0, status, "cond_signal");
5607 }
5608 }
5609
5610 // JSR166
5611 // -------------------------------------------------------
5612
5613 // The solaris and linux implementations of park/unpark are fairly
5614 // conservative for now, but can be improved. They currently use a
5615 // mutex/condvar pair, plus _counter.
5616 // Park decrements _counter if > 0, else does a condvar wait. Unpark
5617 // sets count to 1 and signals condvar. Only one thread ever waits
5618 // on the condvar. Contention seen when trying to park implies that someone
5619 // is unparking you, so don't wait. And spurious returns are fine, so there
5620 // is no need to track notifications.
5621
5622 #define MAX_SECS 100000000
5623
5624 // This code is common to linux and solaris and will be moved to a
5625 // common place in dolphin.
5626 //
5627 // The passed in time value is either a relative time in nanoseconds
5628 // or an absolute time in milliseconds. Either way it has to be unpacked
5629 // into suitable seconds and nanoseconds components and stored in the
5630 // given timespec structure.
5631 // Given time is a 64-bit value and the time_t used in the timespec is only
5632 // a signed-32-bit value (except on 64-bit Linux) we have to watch for
5633 // overflow if times way in the future are given. Further on Solaris versions
5634 // prior to 10 there is a restriction (see cond_timedwait) that the specified
5635 // number of seconds, in abstime, is less than current_time + 100,000,000.
5636 // As it will be 28 years before "now + 100000000" will overflow we can
5637 // ignore overflow and just impose a hard-limit on seconds using the value
5638 // of "now + 100,000,000". This places a limit on the timeout of about 3.17
5639 // years from "now".
5640 //
5641 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5642 assert(time > 0, "convertTime");
5643
5644 struct timeval now;
5645 int status = gettimeofday(&now, NULL);
5646 assert(status == 0, "gettimeofday");
5647
5648 time_t max_secs = now.tv_sec + MAX_SECS;
5649
5650 if (isAbsolute) {
5651 jlong secs = time / 1000;
5652 if (secs > max_secs) {
5653 absTime->tv_sec = max_secs;
5654 } else {
5655 absTime->tv_sec = secs;
5656 }
5657 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5658 } else {
5659 jlong secs = time / NANOSECS_PER_SEC;
5660 if (secs >= MAX_SECS) {
5661 absTime->tv_sec = max_secs;
5662 absTime->tv_nsec = 0;
5663 } else {
5664 absTime->tv_sec = now.tv_sec + secs;
5665 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5666 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5667 absTime->tv_nsec -= NANOSECS_PER_SEC;
5668 ++absTime->tv_sec; // note: this must be <= max_secs
5669 }
5670 }
5671 }
5672 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5673 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5674 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5675 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5676 }
5677
5678 void Parker::park(bool isAbsolute, jlong time) {
5679 // Ideally we'd do something useful while spinning, such
5680 // as calling unpackTime().
5681
5682 // Optional fast-path check:
5683 // Return immediately if a permit is available.
5684 // We depend on Atomic::xchg() having full barrier semantics
5685 // since we are doing a lock-free update to _counter.
5686 if (Atomic::xchg(0, &_counter) > 0) return;
5687
5688 // Optional fast-exit: Check interrupt before trying to wait
5689 Thread* thread = Thread::current();
5690 assert(thread->is_Java_thread(), "Must be JavaThread");
5691 JavaThread *jt = (JavaThread *)thread;
5692 if (Thread::is_interrupted(thread, false)) {
5693 return;
5694 }
5695
5696 // First, demultiplex/decode time arguments
5697 timespec absTime;
5698 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all
5699 return;
5700 }
5701 if (time > 0) {
5702 // Warning: this code might be exposed to the old Solaris time
5703 // round-down bugs. Grep "roundingFix" for details.
5704 unpackTime(&absTime, isAbsolute, time);
5705 }
5706
5707 // Enter safepoint region
5708 // Beware of deadlocks such as 6317397.
5709 // The per-thread Parker:: _mutex is a classic leaf-lock.
5710 // In particular a thread must never block on the Threads_lock while
5711 // holding the Parker:: mutex. If safepoints are pending both the
5712 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
5713 ThreadBlockInVM tbivm(jt);
5714
5715 // Don't wait if cannot get lock since interference arises from
5716 // unblocking. Also. check interrupt before trying wait
5717 if (Thread::is_interrupted(thread, false) ||
5718 os::Solaris::mutex_trylock(_mutex) != 0) {
5719 return;
5720 }
5721
5722 int status;
5723
5724 if (_counter > 0) { // no wait needed
5725 _counter = 0;
5726 status = os::Solaris::mutex_unlock(_mutex);
5727 assert(status == 0, "invariant");
5728 // Paranoia to ensure our locked and lock-free paths interact
5729 // correctly with each other and Java-level accesses.
5730 OrderAccess::fence();
5731 return;
5732 }
5733
5734 #ifdef ASSERT
5735 // Don't catch signals while blocked; let the running threads have the signals.
5736 // (This allows a debugger to break into the running thread.)
5737 sigset_t oldsigs;
5738 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
5739 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
5740 #endif
5741
5742 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
5743 jt->set_suspend_equivalent();
5744 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
5745
5746 // Do this the hard way by blocking ...
5747 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5748 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5749 // Only for SPARC >= V8PlusA
5750 #if defined(__sparc) && defined(COMPILER2)
5751 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5752 #endif
5753
5754 if (time == 0) {
5755 status = os::Solaris::cond_wait(_cond, _mutex);
5756 } else {
5757 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
5758 }
5759 // Note that an untimed cond_wait() can sometimes return ETIME on older
5760 // versions of the Solaris.
5761 assert_status(status == 0 || status == EINTR ||
5762 status == ETIME || status == ETIMEDOUT,
5763 status, "cond_timedwait");
5764
5765 #ifdef ASSERT
5766 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
5767 #endif
5768 _counter = 0;
5769 status = os::Solaris::mutex_unlock(_mutex);
5770 assert_status(status == 0, status, "mutex_unlock");
5771 // Paranoia to ensure our locked and lock-free paths interact
5772 // correctly with each other and Java-level accesses.
5773 OrderAccess::fence();
5774
5775 // If externally suspended while waiting, re-suspend
5776 if (jt->handle_special_suspend_equivalent_condition()) {
5777 jt->java_suspend_self();
5778 }
5779 }
5780
5781 void Parker::unpark() {
5782 int status = os::Solaris::mutex_lock(_mutex);
5783 assert(status == 0, "invariant");
5784 const int s = _counter;
5785 _counter = 1;
5786 status = os::Solaris::mutex_unlock(_mutex);
5787 assert(status == 0, "invariant");
5788
5789 if (s < 1) {
5790 status = os::Solaris::cond_signal(_cond);
5791 assert(status == 0, "invariant");
5792 }
5793 }
5794
5795 extern char** environ;
5796
5797 // Run the specified command in a separate process. Return its exit value,
5798 // or -1 on failure (e.g. can't fork a new process).
5799 // Unlike system(), this function can be called from signal handler. It
5800 // doesn't block SIGINT et al.
5801 int os::fork_and_exec(char* cmd) {
5802 char * argv[4];
5803 argv[0] = (char *)"sh";
5804 argv[1] = (char *)"-c";
5805 argv[2] = cmd;
5806 argv[3] = NULL;
5807
5808 // fork is async-safe, fork1 is not so can't use in signal handler
5809 pid_t pid;
5810 Thread* t = ThreadLocalStorage::get_thread_slow();
5811 if (t != NULL && t->is_inside_signal_handler()) {
5812 pid = fork();
5813 } else {
5814 pid = fork1();
5815 }
5816
5817 if (pid < 0) {
5818 // fork failed
5819 warning("fork failed: %s", strerror(errno));
5820 return -1;
5821
5822 } else if (pid == 0) {
5823 // child process
5824
5825 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
5826 execve("/usr/bin/sh", argv, environ);
5827
5828 // execve failed
5829 _exit(-1);
5830
5831 } else {
5832 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5833 // care about the actual exit code, for now.
5834
5835 int status;
5836
5837 // Wait for the child process to exit. This returns immediately if
5838 // the child has already exited. */
5839 while (waitpid(pid, &status, 0) < 0) {
5840 switch (errno) {
5841 case ECHILD: return 0;
5842 case EINTR: break;
5843 default: return -1;
5844 }
5845 }
5846
5847 if (WIFEXITED(status)) {
5848 // The child exited normally; get its exit code.
5849 return WEXITSTATUS(status);
5850 } else if (WIFSIGNALED(status)) {
5851 // The child exited because of a signal
5852 // The best value to return is 0x80 + signal number,
5853 // because that is what all Unix shells do, and because
5854 // it allows callers to distinguish between process exit and
5855 // process death by signal.
5856 return 0x80 + WTERMSIG(status);
5857 } else {
5858 // Unknown exit code; pass it through
5859 return status;
5860 }
5861 }
5862 }
5863
5864 // is_headless_jre()
5865 //
5866 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
5867 // in order to report if we are running in a headless jre
5868 //
5869 // Since JDK8 xawt/libmawt.so was moved into the same directory
5870 // as libawt.so, and renamed libawt_xawt.so
5871 //
5872 bool os::is_headless_jre() {
5873 struct stat statbuf;
5874 char buf[MAXPATHLEN];
5875 char libmawtpath[MAXPATHLEN];
5876 const char *xawtstr = "/xawt/libmawt.so";
5877 const char *new_xawtstr = "/libawt_xawt.so";
5878 char *p;
5879
5880 // Get path to libjvm.so
5881 os::jvm_path(buf, sizeof(buf));
5882
5883 // Get rid of libjvm.so
5884 p = strrchr(buf, '/');
5885 if (p == NULL) {
5886 return false;
5887 } else {
5888 *p = '\0';
5889 }
5890
5891 // Get rid of client or server
5892 p = strrchr(buf, '/');
5893 if (p == NULL) {
5894 return false;
5895 } else {
5896 *p = '\0';
5897 }
5898
5899 // check xawt/libmawt.so
5900 strcpy(libmawtpath, buf);
5901 strcat(libmawtpath, xawtstr);
5902 if (::stat(libmawtpath, &statbuf) == 0) return false;
5903
5904 // check libawt_xawt.so
5905 strcpy(libmawtpath, buf);
5906 strcat(libmawtpath, new_xawtstr);
5907 if (::stat(libmawtpath, &statbuf) == 0) return false;
5908
5909 return true;
5910 }
5911
5912 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
5913 size_t res;
5914 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5915 "Assumed _thread_in_native");
5916 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
5917 return res;
5918 }
5919
5920 int os::close(int fd) {
5921 return ::close(fd);
5922 }
5923
5924 int os::socket_close(int fd) {
5925 return ::close(fd);
5926 }
5927
5928 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
5929 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5930 "Assumed _thread_in_native");
5931 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags));
5932 }
5933
5934 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
5935 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5936 "Assumed _thread_in_native");
5937 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5938 }
5939
5940 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
5941 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5942 }
5943
5944 // As both poll and select can be interrupted by signals, we have to be
5945 // prepared to restart the system call after updating the timeout, unless
5946 // a poll() is done with timeout == -1, in which case we repeat with this
5947 // "wait forever" value.
5948
5949 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
5950 int _result;
5951 _result = ::connect(fd, him, len);
5952
5953 // On Solaris, when a connect() call is interrupted, the connection
5954 // can be established asynchronously (see 6343810). Subsequent calls
5955 // to connect() must check the errno value which has the semantic
5956 // described below (copied from the connect() man page). Handling
5957 // of asynchronously established connections is required for both
5958 // blocking and non-blocking sockets.
5959 // EINTR The connection attempt was interrupted
5960 // before any data arrived by the delivery of
5961 // a signal. The connection, however, will be
5962 // established asynchronously.
5963 //
5964 // EINPROGRESS The socket is non-blocking, and the connec-
5965 // tion cannot be completed immediately.
5966 //
5967 // EALREADY The socket is non-blocking, and a previous
5968 // connection attempt has not yet been com-
5969 // pleted.
5970 //
5971 // EISCONN The socket is already connected.
5972 if (_result == OS_ERR && errno == EINTR) {
5973 // restarting a connect() changes its errno semantics
5974 RESTARTABLE(::connect(fd, him, len), _result);
5975 // undo these changes
5976 if (_result == OS_ERR) {
5977 if (errno == EALREADY) {
5978 errno = EINPROGRESS; // fall through
5979 } else if (errno == EISCONN) {
5980 errno = 0;
5981 return OS_OK;
5982 }
5983 }
5984 }
5985 return _result;
5986 }
5987
5988 // Get the default path to the core file
5989 // Returns the length of the string
5990 int os::get_core_path(char* buffer, size_t bufferSize) {
5991 const char* p = get_current_directory(buffer, bufferSize);
5992
5993 if (p == NULL) {
5994 assert(p != NULL, "failed to get current directory");
5995 return 0;
5996 }
5997
5998 jio_snprintf(buffer, bufferSize, "%s/core or core.%d",
5999 p, current_process_id());
6000
6001 return strlen(buffer);
6002 }
6003
6004 #ifndef PRODUCT
6005 void TestReserveMemorySpecial_test() {
6006 // No tests available for this platform
6007 }
6008 #endif