1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // no precompiled headers
26 #include "classfile/classLoader.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/icBuffer.hpp"
30 #include "code/vtableStubs.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvm_solaris.h"
35 #include "memory/allocation.inline.hpp"
36 #include "memory/filemap.hpp"
37 #include "mutex_solaris.inline.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "os_share_solaris.hpp"
40 #include "os_solaris.inline.hpp"
41 #include "prims/jniFastGetField.hpp"
42 #include "prims/jvm.h"
43 #include "prims/jvm_misc.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/atomic.inline.hpp"
46 #include "runtime/extendedPC.hpp"
47 #include "runtime/globals.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/java.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/mutexLocker.hpp"
52 #include "runtime/objectMonitor.hpp"
53 #include "runtime/orderAccess.inline.hpp"
54 #include "runtime/osThread.hpp"
55 #include "runtime/perfMemory.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "runtime/statSampler.hpp"
58 #include "runtime/stubRoutines.hpp"
59 #include "runtime/thread.inline.hpp"
60 #include "runtime/threadCritical.hpp"
61 #include "runtime/timer.hpp"
62 #include "runtime/vm_version.hpp"
63 #include "services/attachListener.hpp"
64 #include "services/memTracker.hpp"
65 #include "services/runtimeService.hpp"
66 #include "utilities/decoder.hpp"
67 #include "utilities/defaultStream.hpp"
68 #include "utilities/events.hpp"
69 #include "utilities/growableArray.hpp"
70 #include "utilities/vmError.hpp"
71
72 // put OS-includes here
73 # include <dlfcn.h>
74 # include <errno.h>
75 # include <exception>
76 # include <link.h>
77 # include <poll.h>
78 # include <pthread.h>
79 # include <pwd.h>
80 # include <schedctl.h>
81 # include <setjmp.h>
82 # include <signal.h>
83 # include <stdio.h>
84 # include <alloca.h>
85 # include <sys/filio.h>
86 # include <sys/ipc.h>
87 # include <sys/lwp.h>
88 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
89 # include <sys/mman.h>
90 # include <sys/processor.h>
91 # include <sys/procset.h>
92 # include <sys/pset.h>
93 # include <sys/resource.h>
94 # include <sys/shm.h>
95 # include <sys/socket.h>
96 # include <sys/stat.h>
97 # include <sys/systeminfo.h>
98 # include <sys/time.h>
99 # include <sys/times.h>
100 # include <sys/types.h>
101 # include <sys/wait.h>
102 # include <sys/utsname.h>
103 # include <thread.h>
104 # include <unistd.h>
105 # include <sys/priocntl.h>
106 # include <sys/rtpriocntl.h>
107 # include <sys/tspriocntl.h>
108 # include <sys/iapriocntl.h>
109 # include <sys/fxpriocntl.h>
110 # include <sys/loadavg.h>
111 # include <string.h>
112 # include <stdio.h>
113
114 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
115 # include <sys/procfs.h> // see comment in <sys/procfs.h>
116
117 #define MAX_PATH (2 * K)
118
119 // for timer info max values which include all bits
120 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
121
122
123 // Here are some liblgrp types from sys/lgrp_user.h to be able to
124 // compile on older systems without this header file.
125
126 #ifndef MADV_ACCESS_LWP
127 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
128 #endif
129 #ifndef MADV_ACCESS_MANY
130 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */
131 #endif
132
133 #ifndef LGRP_RSRC_CPU
134 #define LGRP_RSRC_CPU 0 /* CPU resources */
135 #endif
136 #ifndef LGRP_RSRC_MEM
137 #define LGRP_RSRC_MEM 1 /* memory resources */
138 #endif
139
140 // see thr_setprio(3T) for the basis of these numbers
141 #define MinimumPriority 0
142 #define NormalPriority 64
143 #define MaximumPriority 127
144
145 // Values for ThreadPriorityPolicy == 1
146 int prio_policy1[CriticalPriority+1] = {
147 -99999, 0, 16, 32, 48, 64,
148 80, 96, 112, 124, 127, 127 };
149
150 // System parameters used internally
151 static clock_t clock_tics_per_sec = 100;
152
153 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
154 static bool enabled_extended_FILE_stdio = false;
155
156 // For diagnostics to print a message once. see run_periodic_checks
157 static bool check_addr0_done = false;
158 static sigset_t check_signal_done;
159 static bool check_signals = true;
160
161 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
162 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
163
164 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
165
166
167 // "default" initializers for missing libc APIs
168 extern "C" {
169 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
170 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
171
172 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
173 static int lwp_cond_destroy(cond_t *cv) { return 0; }
174 }
175
176 // "default" initializers for pthread-based synchronization
177 extern "C" {
178 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
179 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
180 }
181
182 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time);
183
184 // Thread Local Storage
185 // This is common to all Solaris platforms so it is defined here,
186 // in this common file.
187 // The declarations are in the os_cpu threadLS*.hpp files.
188 //
189 // Static member initialization for TLS
190 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
191
192 #ifndef PRODUCT
193 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
194
195 int ThreadLocalStorage::_tcacheHit = 0;
196 int ThreadLocalStorage::_tcacheMiss = 0;
197
198 void ThreadLocalStorage::print_statistics() {
199 int total = _tcacheMiss+_tcacheHit;
200 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
201 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
202 }
203 #undef _PCT
204 #endif // PRODUCT
205
206 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
207 int index) {
208 Thread *thread = get_thread_slow();
209 if (thread != NULL) {
210 address sp = os::current_stack_pointer();
211 guarantee(thread->_stack_base == NULL ||
212 (sp <= thread->_stack_base &&
213 sp >= thread->_stack_base - thread->_stack_size) ||
214 is_error_reported(),
215 "sp must be inside of selected thread stack");
216
217 thread->set_self_raw_id(raw_id); // mark for quick retrieval
218 _get_thread_cache[index] = thread;
219 }
220 return thread;
221 }
222
223
224 static const double all_zero[sizeof(Thread) / sizeof(double) + 1] = {0};
225 #define NO_CACHED_THREAD ((Thread*)all_zero)
226
227 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
228
229 // Store the new value before updating the cache to prevent a race
230 // between get_thread_via_cache_slowly() and this store operation.
231 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
232
233 // Update thread cache with new thread if setting on thread create,
234 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
235 uintptr_t raw = pd_raw_thread_id();
236 int ix = pd_cache_index(raw);
237 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
238 }
239
240 void ThreadLocalStorage::pd_init() {
241 for (int i = 0; i < _pd_cache_size; i++) {
242 _get_thread_cache[i] = NO_CACHED_THREAD;
243 }
244 }
245
246 // Invalidate all the caches (happens to be the same as pd_init).
247 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
248
249 #undef NO_CACHED_THREAD
250
251 // END Thread Local Storage
252
253 static inline size_t adjust_stack_size(address base, size_t size) {
254 if ((ssize_t)size < 0) {
255 // 4759953: Compensate for ridiculous stack size.
256 size = max_intx;
257 }
258 if (size > (size_t)base) {
259 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
260 size = (size_t)base;
261 }
262 return size;
263 }
264
265 static inline stack_t get_stack_info() {
266 stack_t st;
267 int retval = thr_stksegment(&st);
268 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
269 assert(retval == 0, "incorrect return value from thr_stksegment");
270 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
271 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
272 return st;
273 }
274
275 address os::current_stack_base() {
276 int r = thr_main();
277 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
278 bool is_primordial_thread = r;
279
280 // Workaround 4352906, avoid calls to thr_stksegment by
281 // thr_main after the first one (it looks like we trash
282 // some data, causing the value for ss_sp to be incorrect).
283 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
284 stack_t st = get_stack_info();
285 if (is_primordial_thread) {
286 // cache initial value of stack base
287 os::Solaris::_main_stack_base = (address)st.ss_sp;
288 }
289 return (address)st.ss_sp;
290 } else {
291 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
292 return os::Solaris::_main_stack_base;
293 }
294 }
295
296 size_t os::current_stack_size() {
297 size_t size;
298
299 int r = thr_main();
300 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
301 if (!r) {
302 size = get_stack_info().ss_size;
303 } else {
304 struct rlimit limits;
305 getrlimit(RLIMIT_STACK, &limits);
306 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
307 }
308 // base may not be page aligned
309 address base = current_stack_base();
310 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
311 return (size_t)(base - bottom);
312 }
313
314 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
315 return localtime_r(clock, res);
316 }
317
318 void os::Solaris::try_enable_extended_io() {
319 typedef int (*enable_extended_FILE_stdio_t)(int, int);
320
321 if (!UseExtendedFileIO) {
322 return;
323 }
324
325 enable_extended_FILE_stdio_t enabler =
326 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
327 "enable_extended_FILE_stdio");
328 if (enabler) {
329 enabler(-1, -1);
330 }
331 }
332
333 static int _processors_online = 0;
334
335 jint os::Solaris::_os_thread_limit = 0;
336 volatile jint os::Solaris::_os_thread_count = 0;
337
338 julong os::available_memory() {
339 return Solaris::available_memory();
340 }
341
342 julong os::Solaris::available_memory() {
343 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
344 }
345
346 julong os::Solaris::_physical_memory = 0;
347
348 julong os::physical_memory() {
349 return Solaris::physical_memory();
350 }
351
352 static hrtime_t first_hrtime = 0;
353 static const hrtime_t hrtime_hz = 1000*1000*1000;
354 static volatile hrtime_t max_hrtime = 0;
355
356
357 void os::Solaris::initialize_system_info() {
358 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
359 _processors_online = sysconf(_SC_NPROCESSORS_ONLN);
360 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) *
361 (julong)sysconf(_SC_PAGESIZE);
362 }
363
364 int os::active_processor_count() {
365 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
366 pid_t pid = getpid();
367 psetid_t pset = PS_NONE;
368 // Are we running in a processor set or is there any processor set around?
369 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
370 uint_t pset_cpus;
371 // Query the number of cpus available to us.
372 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
373 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
374 _processors_online = pset_cpus;
375 return pset_cpus;
376 }
377 }
378 // Otherwise return number of online cpus
379 return online_cpus;
380 }
381
382 static bool find_processors_in_pset(psetid_t pset,
383 processorid_t** id_array,
384 uint_t* id_length) {
385 bool result = false;
386 // Find the number of processors in the processor set.
387 if (pset_info(pset, NULL, id_length, NULL) == 0) {
388 // Make up an array to hold their ids.
389 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
390 // Fill in the array with their processor ids.
391 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
392 result = true;
393 }
394 }
395 return result;
396 }
397
398 // Callers of find_processors_online() must tolerate imprecise results --
399 // the system configuration can change asynchronously because of DR
400 // or explicit psradm operations.
401 //
402 // We also need to take care that the loop (below) terminates as the
403 // number of processors online can change between the _SC_NPROCESSORS_ONLN
404 // request and the loop that builds the list of processor ids. Unfortunately
405 // there's no reliable way to determine the maximum valid processor id,
406 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
407 // man pages, which claim the processor id set is "sparse, but
408 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
409 // exit the loop.
410 //
411 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
412 // not available on S8.0.
413
414 static bool find_processors_online(processorid_t** id_array,
415 uint* id_length) {
416 const processorid_t MAX_PROCESSOR_ID = 100000;
417 // Find the number of processors online.
418 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
419 // Make up an array to hold their ids.
420 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
421 // Processors need not be numbered consecutively.
422 long found = 0;
423 processorid_t next = 0;
424 while (found < *id_length && next < MAX_PROCESSOR_ID) {
425 processor_info_t info;
426 if (processor_info(next, &info) == 0) {
427 // NB, PI_NOINTR processors are effectively online ...
428 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
429 (*id_array)[found] = next;
430 found += 1;
431 }
432 }
433 next += 1;
434 }
435 if (found < *id_length) {
436 // The loop above didn't identify the expected number of processors.
437 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
438 // and re-running the loop, above, but there's no guarantee of progress
439 // if the system configuration is in flux. Instead, we just return what
440 // we've got. Note that in the worst case find_processors_online() could
441 // return an empty set. (As a fall-back in the case of the empty set we
442 // could just return the ID of the current processor).
443 *id_length = found;
444 }
445
446 return true;
447 }
448
449 static bool assign_distribution(processorid_t* id_array,
450 uint id_length,
451 uint* distribution,
452 uint distribution_length) {
453 // We assume we can assign processorid_t's to uint's.
454 assert(sizeof(processorid_t) == sizeof(uint),
455 "can't convert processorid_t to uint");
456 // Quick check to see if we won't succeed.
457 if (id_length < distribution_length) {
458 return false;
459 }
460 // Assign processor ids to the distribution.
461 // Try to shuffle processors to distribute work across boards,
462 // assuming 4 processors per board.
463 const uint processors_per_board = ProcessDistributionStride;
464 // Find the maximum processor id.
465 processorid_t max_id = 0;
466 for (uint m = 0; m < id_length; m += 1) {
467 max_id = MAX2(max_id, id_array[m]);
468 }
469 // The next id, to limit loops.
470 const processorid_t limit_id = max_id + 1;
471 // Make up markers for available processors.
472 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
473 for (uint c = 0; c < limit_id; c += 1) {
474 available_id[c] = false;
475 }
476 for (uint a = 0; a < id_length; a += 1) {
477 available_id[id_array[a]] = true;
478 }
479 // Step by "boards", then by "slot", copying to "assigned".
480 // NEEDS_CLEANUP: The assignment of processors should be stateful,
481 // remembering which processors have been assigned by
482 // previous calls, etc., so as to distribute several
483 // independent calls of this method. What we'd like is
484 // It would be nice to have an API that let us ask
485 // how many processes are bound to a processor,
486 // but we don't have that, either.
487 // In the short term, "board" is static so that
488 // subsequent distributions don't all start at board 0.
489 static uint board = 0;
490 uint assigned = 0;
491 // Until we've found enough processors ....
492 while (assigned < distribution_length) {
493 // ... find the next available processor in the board.
494 for (uint slot = 0; slot < processors_per_board; slot += 1) {
495 uint try_id = board * processors_per_board + slot;
496 if ((try_id < limit_id) && (available_id[try_id] == true)) {
497 distribution[assigned] = try_id;
498 available_id[try_id] = false;
499 assigned += 1;
500 break;
501 }
502 }
503 board += 1;
504 if (board * processors_per_board + 0 >= limit_id) {
505 board = 0;
506 }
507 }
508 if (available_id != NULL) {
509 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal);
510 }
511 return true;
512 }
513
514 void os::set_native_thread_name(const char *name) {
515 // Not yet implemented.
516 return;
517 }
518
519 bool os::distribute_processes(uint length, uint* distribution) {
520 bool result = false;
521 // Find the processor id's of all the available CPUs.
522 processorid_t* id_array = NULL;
523 uint id_length = 0;
524 // There are some races between querying information and using it,
525 // since processor sets can change dynamically.
526 psetid_t pset = PS_NONE;
527 // Are we running in a processor set?
528 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
529 result = find_processors_in_pset(pset, &id_array, &id_length);
530 } else {
531 result = find_processors_online(&id_array, &id_length);
532 }
533 if (result == true) {
534 if (id_length >= length) {
535 result = assign_distribution(id_array, id_length, distribution, length);
536 } else {
537 result = false;
538 }
539 }
540 if (id_array != NULL) {
541 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal);
542 }
543 return result;
544 }
545
546 bool os::bind_to_processor(uint processor_id) {
547 // We assume that a processorid_t can be stored in a uint.
548 assert(sizeof(uint) == sizeof(processorid_t),
549 "can't convert uint to processorid_t");
550 int bind_result =
551 processor_bind(P_LWPID, // bind LWP.
552 P_MYID, // bind current LWP.
553 (processorid_t) processor_id, // id.
554 NULL); // don't return old binding.
555 return (bind_result == 0);
556 }
557
558 bool os::getenv(const char* name, char* buffer, int len) {
559 char* val = ::getenv(name);
560 if (val == NULL || strlen(val) + 1 > len) {
561 if (len > 0) buffer[0] = 0; // return a null string
562 return false;
563 }
564 strcpy(buffer, val);
565 return true;
566 }
567
568
569 // Return true if user is running as root.
570
571 bool os::have_special_privileges() {
572 static bool init = false;
573 static bool privileges = false;
574 if (!init) {
575 privileges = (getuid() != geteuid()) || (getgid() != getegid());
576 init = true;
577 }
578 return privileges;
579 }
580
581
582 void os::init_system_properties_values() {
583 // The next steps are taken in the product version:
584 //
585 // Obtain the JAVA_HOME value from the location of libjvm.so.
586 // This library should be located at:
587 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so.
588 //
589 // If "/jre/lib/" appears at the right place in the path, then we
590 // assume libjvm.so is installed in a JDK and we use this path.
591 //
592 // Otherwise exit with message: "Could not create the Java virtual machine."
593 //
594 // The following extra steps are taken in the debugging version:
595 //
596 // If "/jre/lib/" does NOT appear at the right place in the path
597 // instead of exit check for $JAVA_HOME environment variable.
598 //
599 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
600 // then we append a fake suffix "hotspot/libjvm.so" to this path so
601 // it looks like libjvm.so is installed there
602 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so.
603 //
604 // Otherwise exit.
605 //
606 // Important note: if the location of libjvm.so changes this
607 // code needs to be changed accordingly.
608
609 // Base path of extensions installed on the system.
610 #define SYS_EXT_DIR "/usr/jdk/packages"
611 #define EXTENSIONS_DIR "/lib/ext"
612 #define ENDORSED_DIR "/lib/endorsed"
613
614 char cpu_arch[12];
615 // Buffer that fits several sprintfs.
616 // Note that the space for the colon and the trailing null are provided
617 // by the nulls included by the sizeof operator.
618 const size_t bufsize =
619 MAX4((size_t)MAXPATHLEN, // For dll_dir & friends.
620 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path
621 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir
622 (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir
623 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal);
624
625 // sysclasspath, java_home, dll_dir
626 {
627 char *pslash;
628 os::jvm_path(buf, bufsize);
629
630 // Found the full path to libjvm.so.
631 // Now cut the path to <java_home>/jre if we can.
632 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so.
633 pslash = strrchr(buf, '/');
634 if (pslash != NULL) {
635 *pslash = '\0'; // Get rid of /{client|server|hotspot}.
636 }
637 Arguments::set_dll_dir(buf);
638
639 if (pslash != NULL) {
640 pslash = strrchr(buf, '/');
641 if (pslash != NULL) {
642 *pslash = '\0'; // Get rid of /<arch>.
643 pslash = strrchr(buf, '/');
644 if (pslash != NULL) {
645 *pslash = '\0'; // Get rid of /lib.
646 }
647 }
648 }
649 Arguments::set_java_home(buf);
650 set_boot_path('/', ':');
651 }
652
653 // Where to look for native libraries.
654 {
655 // Use dlinfo() to determine the correct java.library.path.
656 //
657 // If we're launched by the Java launcher, and the user
658 // does not set java.library.path explicitly on the commandline,
659 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
660 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
661 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
662 // /usr/lib), which is exactly what we want.
663 //
664 // If the user does set java.library.path, it completely
665 // overwrites this setting, and always has.
666 //
667 // If we're not launched by the Java launcher, we may
668 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
669 // settings. Again, dlinfo does exactly what we want.
670
671 Dl_serinfo info_sz, *info = &info_sz;
672 Dl_serpath *path;
673 char *library_path;
674 char *common_path = buf;
675
676 // Determine search path count and required buffer size.
677 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
678 FREE_C_HEAP_ARRAY(char, buf, mtInternal);
679 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
680 }
681
682 // Allocate new buffer and initialize.
683 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal);
684 info->dls_size = info_sz.dls_size;
685 info->dls_cnt = info_sz.dls_cnt;
686
687 // Obtain search path information.
688 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
689 FREE_C_HEAP_ARRAY(char, buf, mtInternal);
690 FREE_C_HEAP_ARRAY(char, info, mtInternal);
691 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
692 }
693
694 path = &info->dls_serpath[0];
695
696 // Note: Due to a legacy implementation, most of the library path
697 // is set in the launcher. This was to accomodate linking restrictions
698 // on legacy Solaris implementations (which are no longer supported).
699 // Eventually, all the library path setting will be done here.
700 //
701 // However, to prevent the proliferation of improperly built native
702 // libraries, the new path component /usr/jdk/packages is added here.
703
704 // Determine the actual CPU architecture.
705 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
706 #ifdef _LP64
707 // If we are a 64-bit vm, perform the following translations:
708 // sparc -> sparcv9
709 // i386 -> amd64
710 if (strcmp(cpu_arch, "sparc") == 0) {
711 strcat(cpu_arch, "v9");
712 } else if (strcmp(cpu_arch, "i386") == 0) {
713 strcpy(cpu_arch, "amd64");
714 }
715 #endif
716
717 // Construct the invariant part of ld_library_path.
718 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch);
719
720 // Struct size is more than sufficient for the path components obtained
721 // through the dlinfo() call, so only add additional space for the path
722 // components explicitly added here.
723 size_t library_path_size = info->dls_size + strlen(common_path);
724 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal);
725 library_path[0] = '\0';
726
727 // Construct the desired Java library path from the linker's library
728 // search path.
729 //
730 // For compatibility, it is optimal that we insert the additional path
731 // components specific to the Java VM after those components specified
732 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
733 // infrastructure.
734 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it.
735 strcpy(library_path, common_path);
736 } else {
737 int inserted = 0;
738 int i;
739 for (i = 0; i < info->dls_cnt; i++, path++) {
740 uint_t flags = path->dls_flags & LA_SER_MASK;
741 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
742 strcat(library_path, common_path);
743 strcat(library_path, os::path_separator());
744 inserted = 1;
745 }
746 strcat(library_path, path->dls_name);
747 strcat(library_path, os::path_separator());
748 }
749 // Eliminate trailing path separator.
750 library_path[strlen(library_path)-1] = '\0';
751 }
752
753 // happens before argument parsing - can't use a trace flag
754 // tty->print_raw("init_system_properties_values: native lib path: ");
755 // tty->print_raw_cr(library_path);
756
757 // Callee copies into its own buffer.
758 Arguments::set_library_path(library_path);
759
760 FREE_C_HEAP_ARRAY(char, library_path, mtInternal);
761 FREE_C_HEAP_ARRAY(char, info, mtInternal);
762 }
763
764 // Extensions directories.
765 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home());
766 Arguments::set_ext_dirs(buf);
767
768 // Endorsed standards default directory.
769 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
770 Arguments::set_endorsed_dirs(buf);
771
772 FREE_C_HEAP_ARRAY(char, buf, mtInternal);
773
774 #undef SYS_EXT_DIR
775 #undef EXTENSIONS_DIR
776 #undef ENDORSED_DIR
777 }
778
779 void os::breakpoint() {
780 BREAKPOINT;
781 }
782
783 bool os::obsolete_option(const JavaVMOption *option) {
784 if (!strncmp(option->optionString, "-Xt", 3)) {
785 return true;
786 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
787 return true;
788 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
789 return true;
790 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
791 return true;
792 }
793 return false;
794 }
795
796 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
797 address stackStart = (address)thread->stack_base();
798 address stackEnd = (address)(stackStart - (address)thread->stack_size());
799 if (sp < stackStart && sp >= stackEnd) return true;
800 return false;
801 }
802
803 extern "C" void breakpoint() {
804 // use debugger to set breakpoint here
805 }
806
807 static thread_t main_thread;
808
809 // Thread start routine for all new Java threads
810 extern "C" void* java_start(void* thread_addr) {
811 // Try to randomize the cache line index of hot stack frames.
812 // This helps when threads of the same stack traces evict each other's
813 // cache lines. The threads can be either from the same JVM instance, or
814 // from different JVM instances. The benefit is especially true for
815 // processors with hyperthreading technology.
816 static int counter = 0;
817 int pid = os::current_process_id();
818 alloca(((pid ^ counter++) & 7) * 128);
819
820 int prio;
821 Thread* thread = (Thread*)thread_addr;
822 OSThread* osthr = thread->osthread();
823
824 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound
825 thread->_schedctl = (void *) schedctl_init();
826
827 if (UseNUMA) {
828 int lgrp_id = os::numa_get_group_id();
829 if (lgrp_id != -1) {
830 thread->set_lgrp_id(lgrp_id);
831 }
832 }
833
834 // If the creator called set priority before we started,
835 // we need to call set_native_priority now that we have an lwp.
836 // We used to get the priority from thr_getprio (we called
837 // thr_setprio way back in create_thread) and pass it to
838 // set_native_priority, but Solaris scales the priority
839 // in java_to_os_priority, so when we read it back here,
840 // we pass trash to set_native_priority instead of what's
841 // in java_to_os_priority. So we save the native priority
842 // in the osThread and recall it here.
843
844 if (osthr->thread_id() != -1) {
845 if (UseThreadPriorities) {
846 int prio = osthr->native_priority();
847 if (ThreadPriorityVerbose) {
848 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
849 INTPTR_FORMAT ", setting priority: %d\n",
850 osthr->thread_id(), osthr->lwp_id(), prio);
851 }
852 os::set_native_priority(thread, prio);
853 }
854 } else if (ThreadPriorityVerbose) {
855 warning("Can't set priority in _start routine, thread id hasn't been set\n");
856 }
857
858 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
859
860 // initialize signal mask for this thread
861 os::Solaris::hotspot_sigmask(thread);
862
863 thread->run();
864
865 // One less thread is executing
866 // When the VMThread gets here, the main thread may have already exited
867 // which frees the CodeHeap containing the Atomic::dec code
868 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
869 Atomic::dec(&os::Solaris::_os_thread_count);
870 }
871
872 if (UseDetachedThreads) {
873 thr_exit(NULL);
874 ShouldNotReachHere();
875 }
876 return NULL;
877 }
878
879 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
880 // Allocate the OSThread object
881 OSThread* osthread = new OSThread(NULL, NULL);
882 if (osthread == NULL) return NULL;
883
884 // Store info on the Solaris thread into the OSThread
885 osthread->set_thread_id(thread_id);
886 osthread->set_lwp_id(_lwp_self());
887 thread->_schedctl = (void *) schedctl_init();
888
889 if (UseNUMA) {
890 int lgrp_id = os::numa_get_group_id();
891 if (lgrp_id != -1) {
892 thread->set_lgrp_id(lgrp_id);
893 }
894 }
895
896 if (ThreadPriorityVerbose) {
897 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
898 osthread->thread_id(), osthread->lwp_id());
899 }
900
901 // Initial thread state is INITIALIZED, not SUSPENDED
902 osthread->set_state(INITIALIZED);
903
904 return osthread;
905 }
906
907 void os::Solaris::hotspot_sigmask(Thread* thread) {
908 //Save caller's signal mask
909 sigset_t sigmask;
910 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
911 OSThread *osthread = thread->osthread();
912 osthread->set_caller_sigmask(sigmask);
913
914 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
915 if (!ReduceSignalUsage) {
916 if (thread->is_VM_thread()) {
917 // Only the VM thread handles BREAK_SIGNAL ...
918 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
919 } else {
920 // ... all other threads block BREAK_SIGNAL
921 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
922 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
923 }
924 }
925 }
926
927 bool os::create_attached_thread(JavaThread* thread) {
928 #ifdef ASSERT
929 thread->verify_not_published();
930 #endif
931 OSThread* osthread = create_os_thread(thread, thr_self());
932 if (osthread == NULL) {
933 return false;
934 }
935
936 // Initial thread state is RUNNABLE
937 osthread->set_state(RUNNABLE);
938 thread->set_osthread(osthread);
939
940 // initialize signal mask for this thread
941 // and save the caller's signal mask
942 os::Solaris::hotspot_sigmask(thread);
943
944 return true;
945 }
946
947 bool os::create_main_thread(JavaThread* thread) {
948 #ifdef ASSERT
949 thread->verify_not_published();
950 #endif
951 if (_starting_thread == NULL) {
952 _starting_thread = create_os_thread(thread, main_thread);
953 if (_starting_thread == NULL) {
954 return false;
955 }
956 }
957
958 // The primodial thread is runnable from the start
959 _starting_thread->set_state(RUNNABLE);
960
961 thread->set_osthread(_starting_thread);
962
963 // initialize signal mask for this thread
964 // and save the caller's signal mask
965 os::Solaris::hotspot_sigmask(thread);
966
967 return true;
968 }
969
970
971 bool os::create_thread(Thread* thread, ThreadType thr_type,
972 size_t stack_size) {
973 // Allocate the OSThread object
974 OSThread* osthread = new OSThread(NULL, NULL);
975 if (osthread == NULL) {
976 return false;
977 }
978
979 if (ThreadPriorityVerbose) {
980 char *thrtyp;
981 switch (thr_type) {
982 case vm_thread:
983 thrtyp = (char *)"vm";
984 break;
985 case cgc_thread:
986 thrtyp = (char *)"cgc";
987 break;
988 case pgc_thread:
989 thrtyp = (char *)"pgc";
990 break;
991 case java_thread:
992 thrtyp = (char *)"java";
993 break;
994 case compiler_thread:
995 thrtyp = (char *)"compiler";
996 break;
997 case watcher_thread:
998 thrtyp = (char *)"watcher";
999 break;
1000 default:
1001 thrtyp = (char *)"unknown";
1002 break;
1003 }
1004 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
1005 }
1006
1007 // Calculate stack size if it's not specified by caller.
1008 if (stack_size == 0) {
1009 // The default stack size 1M (2M for LP64).
1010 stack_size = (BytesPerWord >> 2) * K * K;
1011
1012 switch (thr_type) {
1013 case os::java_thread:
1014 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
1015 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
1016 break;
1017 case os::compiler_thread:
1018 if (CompilerThreadStackSize > 0) {
1019 stack_size = (size_t)(CompilerThreadStackSize * K);
1020 break;
1021 } // else fall through:
1022 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1023 case os::vm_thread:
1024 case os::pgc_thread:
1025 case os::cgc_thread:
1026 case os::watcher_thread:
1027 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1028 break;
1029 }
1030 }
1031 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1032
1033 // Initial state is ALLOCATED but not INITIALIZED
1034 osthread->set_state(ALLOCATED);
1035
1036 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1037 // We got lots of threads. Check if we still have some address space left.
1038 // Need to be at least 5Mb of unreserved address space. We do check by
1039 // trying to reserve some.
1040 const size_t VirtualMemoryBangSize = 20*K*K;
1041 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1042 if (mem == NULL) {
1043 delete osthread;
1044 return false;
1045 } else {
1046 // Release the memory again
1047 os::release_memory(mem, VirtualMemoryBangSize);
1048 }
1049 }
1050
1051 // Setup osthread because the child thread may need it.
1052 thread->set_osthread(osthread);
1053
1054 // Create the Solaris thread
1055 thread_t tid = 0;
1056 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED;
1057 int status;
1058
1059 // Mark that we don't have an lwp or thread id yet.
1060 // In case we attempt to set the priority before the thread starts.
1061 osthread->set_lwp_id(-1);
1062 osthread->set_thread_id(-1);
1063
1064 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1065 if (status != 0) {
1066 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1067 perror("os::create_thread");
1068 }
1069 thread->set_osthread(NULL);
1070 // Need to clean up stuff we've allocated so far
1071 delete osthread;
1072 return false;
1073 }
1074
1075 Atomic::inc(&os::Solaris::_os_thread_count);
1076
1077 // Store info on the Solaris thread into the OSThread
1078 osthread->set_thread_id(tid);
1079
1080 // Remember that we created this thread so we can set priority on it
1081 osthread->set_vm_created();
1082
1083 // Initial thread state is INITIALIZED, not SUSPENDED
1084 osthread->set_state(INITIALIZED);
1085
1086 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1087 return true;
1088 }
1089
1090 // defined for >= Solaris 10. This allows builds on earlier versions
1091 // of Solaris to take advantage of the newly reserved Solaris JVM signals
1092 // With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1093 // and -XX:+UseAltSigs does nothing since these should have no conflict
1094 //
1095 #if !defined(SIGJVM1)
1096 #define SIGJVM1 39
1097 #define SIGJVM2 40
1098 #endif
1099
1100 debug_only(static bool signal_sets_initialized = false);
1101 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1102 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1103 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1104
1105 bool os::Solaris::is_sig_ignored(int sig) {
1106 struct sigaction oact;
1107 sigaction(sig, (struct sigaction*)NULL, &oact);
1108 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1109 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1110 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) {
1111 return true;
1112 } else {
1113 return false;
1114 }
1115 }
1116
1117 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1118 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1119 static bool isJVM1available() {
1120 return SIGJVM1 < SIGRTMIN;
1121 }
1122
1123 void os::Solaris::signal_sets_init() {
1124 // Should also have an assertion stating we are still single-threaded.
1125 assert(!signal_sets_initialized, "Already initialized");
1126 // Fill in signals that are necessarily unblocked for all threads in
1127 // the VM. Currently, we unblock the following signals:
1128 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1129 // by -Xrs (=ReduceSignalUsage));
1130 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1131 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1132 // the dispositions or masks wrt these signals.
1133 // Programs embedding the VM that want to use the above signals for their
1134 // own purposes must, at this time, use the "-Xrs" option to prevent
1135 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1136 // (See bug 4345157, and other related bugs).
1137 // In reality, though, unblocking these signals is really a nop, since
1138 // these signals are not blocked by default.
1139 sigemptyset(&unblocked_sigs);
1140 sigemptyset(&allowdebug_blocked_sigs);
1141 sigaddset(&unblocked_sigs, SIGILL);
1142 sigaddset(&unblocked_sigs, SIGSEGV);
1143 sigaddset(&unblocked_sigs, SIGBUS);
1144 sigaddset(&unblocked_sigs, SIGFPE);
1145
1146 if (isJVM1available) {
1147 os::Solaris::set_SIGinterrupt(SIGJVM1);
1148 os::Solaris::set_SIGasync(SIGJVM2);
1149 } else if (UseAltSigs) {
1150 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1151 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1152 } else {
1153 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1154 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1155 }
1156
1157 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1158 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1159
1160 if (!ReduceSignalUsage) {
1161 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1162 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1163 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1164 }
1165 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1166 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1167 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1168 }
1169 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1170 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1171 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1172 }
1173 }
1174 // Fill in signals that are blocked by all but the VM thread.
1175 sigemptyset(&vm_sigs);
1176 if (!ReduceSignalUsage) {
1177 sigaddset(&vm_sigs, BREAK_SIGNAL);
1178 }
1179 debug_only(signal_sets_initialized = true);
1180
1181 // For diagnostics only used in run_periodic_checks
1182 sigemptyset(&check_signal_done);
1183 }
1184
1185 // These are signals that are unblocked while a thread is running Java.
1186 // (For some reason, they get blocked by default.)
1187 sigset_t* os::Solaris::unblocked_signals() {
1188 assert(signal_sets_initialized, "Not initialized");
1189 return &unblocked_sigs;
1190 }
1191
1192 // These are the signals that are blocked while a (non-VM) thread is
1193 // running Java. Only the VM thread handles these signals.
1194 sigset_t* os::Solaris::vm_signals() {
1195 assert(signal_sets_initialized, "Not initialized");
1196 return &vm_sigs;
1197 }
1198
1199 // These are signals that are blocked during cond_wait to allow debugger in
1200 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1201 assert(signal_sets_initialized, "Not initialized");
1202 return &allowdebug_blocked_sigs;
1203 }
1204
1205
1206 void _handle_uncaught_cxx_exception() {
1207 VMError err("An uncaught C++ exception");
1208 err.report_and_die();
1209 }
1210
1211
1212 // First crack at OS-specific initialization, from inside the new thread.
1213 void os::initialize_thread(Thread* thr) {
1214 int r = thr_main();
1215 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
1216 if (r) {
1217 JavaThread* jt = (JavaThread *)thr;
1218 assert(jt != NULL, "Sanity check");
1219 size_t stack_size;
1220 address base = jt->stack_base();
1221 if (Arguments::created_by_java_launcher()) {
1222 // Use 2MB to allow for Solaris 7 64 bit mode.
1223 stack_size = JavaThread::stack_size_at_create() == 0
1224 ? 2048*K : JavaThread::stack_size_at_create();
1225
1226 // There are rare cases when we may have already used more than
1227 // the basic stack size allotment before this method is invoked.
1228 // Attempt to allow for a normally sized java_stack.
1229 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1230 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1231 } else {
1232 // 6269555: If we were not created by a Java launcher, i.e. if we are
1233 // running embedded in a native application, treat the primordial thread
1234 // as much like a native attached thread as possible. This means using
1235 // the current stack size from thr_stksegment(), unless it is too large
1236 // to reliably setup guard pages. A reasonable max size is 8MB.
1237 size_t current_size = current_stack_size();
1238 // This should never happen, but just in case....
1239 if (current_size == 0) current_size = 2 * K * K;
1240 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1241 }
1242 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1243 stack_size = (size_t)(base - bottom);
1244
1245 assert(stack_size > 0, "Stack size calculation problem");
1246
1247 if (stack_size > jt->stack_size()) {
1248 #ifndef PRODUCT
1249 struct rlimit limits;
1250 getrlimit(RLIMIT_STACK, &limits);
1251 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1252 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1253 #endif
1254 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n"
1255 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1256 "See limit(1) to increase the stack size limit.",
1257 stack_size / K, jt->stack_size() / K);
1258 vm_exit(1);
1259 }
1260 assert(jt->stack_size() >= stack_size,
1261 "Attempt to map more stack than was allocated");
1262 jt->set_stack_size(stack_size);
1263 }
1264
1265 // With the T2 libthread (T1 is no longer supported) threads are always bound
1266 // and we use stackbanging in all cases.
1267
1268 os::Solaris::init_thread_fpu_state();
1269 std::set_terminate(_handle_uncaught_cxx_exception);
1270 }
1271
1272
1273
1274 // Free Solaris resources related to the OSThread
1275 void os::free_thread(OSThread* osthread) {
1276 assert(osthread != NULL, "os::free_thread but osthread not set");
1277
1278
1279 // We are told to free resources of the argument thread,
1280 // but we can only really operate on the current thread.
1281 // The main thread must take the VMThread down synchronously
1282 // before the main thread exits and frees up CodeHeap
1283 guarantee((Thread::current()->osthread() == osthread
1284 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1285 if (Thread::current()->osthread() == osthread) {
1286 // Restore caller's signal mask
1287 sigset_t sigmask = osthread->caller_sigmask();
1288 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1289 }
1290 delete osthread;
1291 }
1292
1293 void os::pd_start_thread(Thread* thread) {
1294 int status = thr_continue(thread->osthread()->thread_id());
1295 assert_status(status == 0, status, "thr_continue failed");
1296 }
1297
1298
1299 intx os::current_thread_id() {
1300 return (intx)thr_self();
1301 }
1302
1303 static pid_t _initial_pid = 0;
1304
1305 int os::current_process_id() {
1306 return (int)(_initial_pid ? _initial_pid : getpid());
1307 }
1308
1309 int os::allocate_thread_local_storage() {
1310 // %%% in Win32 this allocates a memory segment pointed to by a
1311 // register. Dan Stein can implement a similar feature in
1312 // Solaris. Alternatively, the VM can do the same thing
1313 // explicitly: malloc some storage and keep the pointer in a
1314 // register (which is part of the thread's context) (or keep it
1315 // in TLS).
1316 // %%% In current versions of Solaris, thr_self and TSD can
1317 // be accessed via short sequences of displaced indirections.
1318 // The value of thr_self is available as %g7(36).
1319 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1320 // assuming that the current thread already has a value bound to k.
1321 // It may be worth experimenting with such access patterns,
1322 // and later having the parameters formally exported from a Solaris
1323 // interface. I think, however, that it will be faster to
1324 // maintain the invariant that %g2 always contains the
1325 // JavaThread in Java code, and have stubs simply
1326 // treat %g2 as a caller-save register, preserving it in a %lN.
1327 thread_key_t tk;
1328 if (thr_keycreate(&tk, NULL)) {
1329 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1330 "(%s)", strerror(errno)));
1331 }
1332 return int(tk);
1333 }
1334
1335 void os::free_thread_local_storage(int index) {
1336 // %%% don't think we need anything here
1337 // if (pthread_key_delete((pthread_key_t) tk)) {
1338 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1339 // }
1340 }
1341
1342 // libthread allocate for tsd_common is a version specific
1343 // small number - point is NO swap space available
1344 #define SMALLINT 32
1345 void os::thread_local_storage_at_put(int index, void* value) {
1346 // %%% this is used only in threadLocalStorage.cpp
1347 if (thr_setspecific((thread_key_t)index, value)) {
1348 if (errno == ENOMEM) {
1349 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR,
1350 "thr_setspecific: out of swap space");
1351 } else {
1352 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1353 "(%s)", strerror(errno)));
1354 }
1355 } else {
1356 ThreadLocalStorage::set_thread_in_slot((Thread *) value);
1357 }
1358 }
1359
1360 // This function could be called before TLS is initialized, for example, when
1361 // VM receives an async signal or when VM causes a fatal error during
1362 // initialization. Return NULL if thr_getspecific() fails.
1363 void* os::thread_local_storage_at(int index) {
1364 // %%% this is used only in threadLocalStorage.cpp
1365 void* r = NULL;
1366 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1367 }
1368
1369
1370 // gethrtime() should be monotonic according to the documentation,
1371 // but some virtualized platforms are known to break this guarantee.
1372 // getTimeNanos() must be guaranteed not to move backwards, so we
1373 // are forced to add a check here.
1374 inline hrtime_t getTimeNanos() {
1375 const hrtime_t now = gethrtime();
1376 const hrtime_t prev = max_hrtime;
1377 if (now <= prev) {
1378 return prev; // same or retrograde time;
1379 }
1380 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1381 assert(obsv >= prev, "invariant"); // Monotonicity
1382 // If the CAS succeeded then we're done and return "now".
1383 // If the CAS failed and the observed value "obsv" is >= now then
1384 // we should return "obsv". If the CAS failed and now > obsv > prv then
1385 // some other thread raced this thread and installed a new value, in which case
1386 // we could either (a) retry the entire operation, (b) retry trying to install now
1387 // or (c) just return obsv. We use (c). No loop is required although in some cases
1388 // we might discard a higher "now" value in deference to a slightly lower but freshly
1389 // installed obsv value. That's entirely benign -- it admits no new orderings compared
1390 // to (a) or (b) -- and greatly reduces coherence traffic.
1391 // We might also condition (c) on the magnitude of the delta between obsv and now.
1392 // Avoiding excessive CAS operations to hot RW locations is critical.
1393 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate
1394 return (prev == obsv) ? now : obsv;
1395 }
1396
1397 // Time since start-up in seconds to a fine granularity.
1398 // Used by VMSelfDestructTimer and the MemProfiler.
1399 double os::elapsedTime() {
1400 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1401 }
1402
1403 jlong os::elapsed_counter() {
1404 return (jlong)(getTimeNanos() - first_hrtime);
1405 }
1406
1407 jlong os::elapsed_frequency() {
1408 return hrtime_hz;
1409 }
1410
1411 // Return the real, user, and system times in seconds from an
1412 // arbitrary fixed point in the past.
1413 bool os::getTimesSecs(double* process_real_time,
1414 double* process_user_time,
1415 double* process_system_time) {
1416 struct tms ticks;
1417 clock_t real_ticks = times(&ticks);
1418
1419 if (real_ticks == (clock_t) (-1)) {
1420 return false;
1421 } else {
1422 double ticks_per_second = (double) clock_tics_per_sec;
1423 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1424 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1425 // For consistency return the real time from getTimeNanos()
1426 // converted to seconds.
1427 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1428
1429 return true;
1430 }
1431 }
1432
1433 bool os::supports_vtime() { return true; }
1434
1435 bool os::enable_vtime() {
1436 int fd = ::open("/proc/self/ctl", O_WRONLY);
1437 if (fd == -1) {
1438 return false;
1439 }
1440
1441 long cmd[] = { PCSET, PR_MSACCT };
1442 int res = ::write(fd, cmd, sizeof(long) * 2);
1443 ::close(fd);
1444 if (res != sizeof(long) * 2) {
1445 return false;
1446 }
1447 return true;
1448 }
1449
1450 bool os::vtime_enabled() {
1451 int fd = ::open("/proc/self/status", O_RDONLY);
1452 if (fd == -1) {
1453 return false;
1454 }
1455
1456 pstatus_t status;
1457 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1458 ::close(fd);
1459 if (res != sizeof(pstatus_t)) {
1460 return false;
1461 }
1462 return status.pr_flags & PR_MSACCT;
1463 }
1464
1465 double os::elapsedVTime() {
1466 return (double)gethrvtime() / (double)hrtime_hz;
1467 }
1468
1469 // Used internally for comparisons only
1470 // getTimeMillis guaranteed to not move backwards on Solaris
1471 jlong getTimeMillis() {
1472 jlong nanotime = getTimeNanos();
1473 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1474 }
1475
1476 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1477 jlong os::javaTimeMillis() {
1478 timeval t;
1479 if (gettimeofday(&t, NULL) == -1) {
1480 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1481 }
1482 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1483 }
1484
1485 jlong os::javaTimeNanos() {
1486 return (jlong)getTimeNanos();
1487 }
1488
1489 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1490 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1491 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1492 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1493 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1494 }
1495
1496 char * os::local_time_string(char *buf, size_t buflen) {
1497 struct tm t;
1498 time_t long_time;
1499 time(&long_time);
1500 localtime_r(&long_time, &t);
1501 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1502 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1503 t.tm_hour, t.tm_min, t.tm_sec);
1504 return buf;
1505 }
1506
1507 // Note: os::shutdown() might be called very early during initialization, or
1508 // called from signal handler. Before adding something to os::shutdown(), make
1509 // sure it is async-safe and can handle partially initialized VM.
1510 void os::shutdown() {
1511
1512 // allow PerfMemory to attempt cleanup of any persistent resources
1513 perfMemory_exit();
1514
1515 // needs to remove object in file system
1516 AttachListener::abort();
1517
1518 // flush buffered output, finish log files
1519 ostream_abort();
1520
1521 // Check for abort hook
1522 abort_hook_t abort_hook = Arguments::abort_hook();
1523 if (abort_hook != NULL) {
1524 abort_hook();
1525 }
1526 }
1527
1528 // Note: os::abort() might be called very early during initialization, or
1529 // called from signal handler. Before adding something to os::abort(), make
1530 // sure it is async-safe and can handle partially initialized VM.
1531 void os::abort(bool dump_core) {
1532 os::shutdown();
1533 if (dump_core) {
1534 #ifndef PRODUCT
1535 fdStream out(defaultStream::output_fd());
1536 out.print_raw("Current thread is ");
1537 char buf[16];
1538 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1539 out.print_raw_cr(buf);
1540 out.print_raw_cr("Dumping core ...");
1541 #endif
1542 ::abort(); // dump core (for debugging)
1543 }
1544
1545 ::exit(1);
1546 }
1547
1548 // Die immediately, no exit hook, no abort hook, no cleanup.
1549 void os::die() {
1550 ::abort(); // dump core (for debugging)
1551 }
1552
1553 // DLL functions
1554
1555 const char* os::dll_file_extension() { return ".so"; }
1556
1557 // This must be hard coded because it's the system's temporary
1558 // directory not the java application's temp directory, ala java.io.tmpdir.
1559 const char* os::get_temp_directory() { return "/tmp"; }
1560
1561 static bool file_exists(const char* filename) {
1562 struct stat statbuf;
1563 if (filename == NULL || strlen(filename) == 0) {
1564 return false;
1565 }
1566 return os::stat(filename, &statbuf) == 0;
1567 }
1568
1569 bool os::dll_build_name(char* buffer, size_t buflen,
1570 const char* pname, const char* fname) {
1571 bool retval = false;
1572 const size_t pnamelen = pname ? strlen(pname) : 0;
1573
1574 // Return error on buffer overflow.
1575 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1576 return retval;
1577 }
1578
1579 if (pnamelen == 0) {
1580 snprintf(buffer, buflen, "lib%s.so", fname);
1581 retval = true;
1582 } else if (strchr(pname, *os::path_separator()) != NULL) {
1583 int n;
1584 char** pelements = split_path(pname, &n);
1585 if (pelements == NULL) {
1586 return false;
1587 }
1588 for (int i = 0; i < n; i++) {
1589 // really shouldn't be NULL but what the heck, check can't hurt
1590 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1591 continue; // skip the empty path values
1592 }
1593 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1594 if (file_exists(buffer)) {
1595 retval = true;
1596 break;
1597 }
1598 }
1599 // release the storage
1600 for (int i = 0; i < n; i++) {
1601 if (pelements[i] != NULL) {
1602 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
1603 }
1604 }
1605 if (pelements != NULL) {
1606 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
1607 }
1608 } else {
1609 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1610 retval = true;
1611 }
1612 return retval;
1613 }
1614
1615 // check if addr is inside libjvm.so
1616 bool os::address_is_in_vm(address addr) {
1617 static address libjvm_base_addr;
1618 Dl_info dlinfo;
1619
1620 if (libjvm_base_addr == NULL) {
1621 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
1622 libjvm_base_addr = (address)dlinfo.dli_fbase;
1623 }
1624 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1625 }
1626
1627 if (dladdr((void *)addr, &dlinfo) != 0) {
1628 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1629 }
1630
1631 return false;
1632 }
1633
1634 typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int);
1635 static dladdr1_func_type dladdr1_func = NULL;
1636
1637 bool os::dll_address_to_function_name(address addr, char *buf,
1638 int buflen, int * offset) {
1639 // buf is not optional, but offset is optional
1640 assert(buf != NULL, "sanity check");
1641
1642 Dl_info dlinfo;
1643
1644 // dladdr1_func was initialized in os::init()
1645 if (dladdr1_func != NULL) {
1646 // yes, we have dladdr1
1647
1648 // Support for dladdr1 is checked at runtime; it may be
1649 // available even if the vm is built on a machine that does
1650 // not have dladdr1 support. Make sure there is a value for
1651 // RTLD_DL_SYMENT.
1652 #ifndef RTLD_DL_SYMENT
1653 #define RTLD_DL_SYMENT 1
1654 #endif
1655 #ifdef _LP64
1656 Elf64_Sym * info;
1657 #else
1658 Elf32_Sym * info;
1659 #endif
1660 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1661 RTLD_DL_SYMENT) != 0) {
1662 // see if we have a matching symbol that covers our address
1663 if (dlinfo.dli_saddr != NULL &&
1664 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1665 if (dlinfo.dli_sname != NULL) {
1666 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1667 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1668 }
1669 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1670 return true;
1671 }
1672 }
1673 // no matching symbol so try for just file info
1674 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1675 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1676 buf, buflen, offset, dlinfo.dli_fname)) {
1677 return true;
1678 }
1679 }
1680 }
1681 buf[0] = '\0';
1682 if (offset != NULL) *offset = -1;
1683 return false;
1684 }
1685
1686 // no, only dladdr is available
1687 if (dladdr((void *)addr, &dlinfo) != 0) {
1688 // see if we have a matching symbol
1689 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
1690 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1691 jio_snprintf(buf, buflen, dlinfo.dli_sname);
1692 }
1693 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1694 return true;
1695 }
1696 // no matching symbol so try for just file info
1697 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1698 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1699 buf, buflen, offset, dlinfo.dli_fname)) {
1700 return true;
1701 }
1702 }
1703 }
1704 buf[0] = '\0';
1705 if (offset != NULL) *offset = -1;
1706 return false;
1707 }
1708
1709 bool os::dll_address_to_library_name(address addr, char* buf,
1710 int buflen, int* offset) {
1711 // buf is not optional, but offset is optional
1712 assert(buf != NULL, "sanity check");
1713
1714 Dl_info dlinfo;
1715
1716 if (dladdr((void*)addr, &dlinfo) != 0) {
1717 if (dlinfo.dli_fname != NULL) {
1718 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1719 }
1720 if (dlinfo.dli_fbase != NULL && offset != NULL) {
1721 *offset = addr - (address)dlinfo.dli_fbase;
1722 }
1723 return true;
1724 }
1725
1726 buf[0] = '\0';
1727 if (offset) *offset = -1;
1728 return false;
1729 }
1730
1731 int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) {
1732 Dl_info dli;
1733 // Sanity check?
1734 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 ||
1735 dli.dli_fname == NULL) {
1736 return 1;
1737 }
1738
1739 void * handle = dlopen(dli.dli_fname, RTLD_LAZY);
1740 if (handle == NULL) {
1741 return 1;
1742 }
1743
1744 Link_map *map;
1745 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1746 if (map == NULL) {
1747 dlclose(handle);
1748 return 1;
1749 }
1750
1751 while (map->l_prev != NULL) {
1752 map = map->l_prev;
1753 }
1754
1755 while (map != NULL) {
1756 // Iterate through all map entries and call callback with fields of interest
1757 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) {
1758 dlclose(handle);
1759 return 1;
1760 }
1761 map = map->l_next;
1762 }
1763
1764 dlclose(handle);
1765 return 0;
1766 }
1767
1768 int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) {
1769 outputStream * out = (outputStream *) param;
1770 out->print_cr(PTR_FORMAT " \t%s", base_address, name);
1771 return 0;
1772 }
1773
1774 void os::print_dll_info(outputStream * st) {
1775 st->print_cr("Dynamic libraries:"); st->flush();
1776 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) {
1777 st->print_cr("Error: Cannot print dynamic libraries.");
1778 }
1779 }
1780
1781 // Loads .dll/.so and
1782 // in case of error it checks if .dll/.so was built for the
1783 // same architecture as Hotspot is running on
1784
1785 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
1786 void * result= ::dlopen(filename, RTLD_LAZY);
1787 if (result != NULL) {
1788 // Successful loading
1789 return result;
1790 }
1791
1792 Elf32_Ehdr elf_head;
1793
1794 // Read system error message into ebuf
1795 // It may or may not be overwritten below
1796 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
1797 ebuf[ebuflen-1]='\0';
1798 int diag_msg_max_length=ebuflen-strlen(ebuf);
1799 char* diag_msg_buf=ebuf+strlen(ebuf);
1800
1801 if (diag_msg_max_length==0) {
1802 // No more space in ebuf for additional diagnostics message
1803 return NULL;
1804 }
1805
1806
1807 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1808
1809 if (file_descriptor < 0) {
1810 // Can't open library, report dlerror() message
1811 return NULL;
1812 }
1813
1814 bool failed_to_read_elf_head=
1815 (sizeof(elf_head)!=
1816 (::read(file_descriptor, &elf_head,sizeof(elf_head))));
1817
1818 ::close(file_descriptor);
1819 if (failed_to_read_elf_head) {
1820 // file i/o error - report dlerror() msg
1821 return NULL;
1822 }
1823
1824 typedef struct {
1825 Elf32_Half code; // Actual value as defined in elf.h
1826 Elf32_Half compat_class; // Compatibility of archs at VM's sense
1827 char elf_class; // 32 or 64 bit
1828 char endianess; // MSB or LSB
1829 char* name; // String representation
1830 } arch_t;
1831
1832 static const arch_t arch_array[]={
1833 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1834 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1835 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
1836 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
1837 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1838 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1839 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
1840 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
1841 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
1842 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
1843 };
1844
1845 #if (defined IA32)
1846 static Elf32_Half running_arch_code=EM_386;
1847 #elif (defined AMD64)
1848 static Elf32_Half running_arch_code=EM_X86_64;
1849 #elif (defined IA64)
1850 static Elf32_Half running_arch_code=EM_IA_64;
1851 #elif (defined __sparc) && (defined _LP64)
1852 static Elf32_Half running_arch_code=EM_SPARCV9;
1853 #elif (defined __sparc) && (!defined _LP64)
1854 static Elf32_Half running_arch_code=EM_SPARC;
1855 #elif (defined __powerpc64__)
1856 static Elf32_Half running_arch_code=EM_PPC64;
1857 #elif (defined __powerpc__)
1858 static Elf32_Half running_arch_code=EM_PPC;
1859 #elif (defined ARM)
1860 static Elf32_Half running_arch_code=EM_ARM;
1861 #else
1862 #error Method os::dll_load requires that one of following is defined:\
1863 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
1864 #endif
1865
1866 // Identify compatability class for VM's architecture and library's architecture
1867 // Obtain string descriptions for architectures
1868
1869 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
1870 int running_arch_index=-1;
1871
1872 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) {
1873 if (running_arch_code == arch_array[i].code) {
1874 running_arch_index = i;
1875 }
1876 if (lib_arch.code == arch_array[i].code) {
1877 lib_arch.compat_class = arch_array[i].compat_class;
1878 lib_arch.name = arch_array[i].name;
1879 }
1880 }
1881
1882 assert(running_arch_index != -1,
1883 "Didn't find running architecture code (running_arch_code) in arch_array");
1884 if (running_arch_index == -1) {
1885 // Even though running architecture detection failed
1886 // we may still continue with reporting dlerror() message
1887 return NULL;
1888 }
1889
1890 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
1891 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
1892 return NULL;
1893 }
1894
1895 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
1896 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
1897 return NULL;
1898 }
1899
1900 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
1901 if (lib_arch.name!=NULL) {
1902 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1903 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
1904 lib_arch.name, arch_array[running_arch_index].name);
1905 } else {
1906 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1907 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
1908 lib_arch.code,
1909 arch_array[running_arch_index].name);
1910 }
1911 }
1912
1913 return NULL;
1914 }
1915
1916 void* os::dll_lookup(void* handle, const char* name) {
1917 return dlsym(handle, name);
1918 }
1919
1920 void* os::get_default_process_handle() {
1921 return (void*)::dlopen(NULL, RTLD_LAZY);
1922 }
1923
1924 int os::stat(const char *path, struct stat *sbuf) {
1925 char pathbuf[MAX_PATH];
1926 if (strlen(path) > MAX_PATH - 1) {
1927 errno = ENAMETOOLONG;
1928 return -1;
1929 }
1930 os::native_path(strcpy(pathbuf, path));
1931 return ::stat(pathbuf, sbuf);
1932 }
1933
1934 static bool _print_ascii_file(const char* filename, outputStream* st) {
1935 int fd = ::open(filename, O_RDONLY);
1936 if (fd == -1) {
1937 return false;
1938 }
1939
1940 char buf[32];
1941 int bytes;
1942 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
1943 st->print_raw(buf, bytes);
1944 }
1945
1946 ::close(fd);
1947
1948 return true;
1949 }
1950
1951 void os::print_os_info_brief(outputStream* st) {
1952 os::Solaris::print_distro_info(st);
1953
1954 os::Posix::print_uname_info(st);
1955
1956 os::Solaris::print_libversion_info(st);
1957 }
1958
1959 void os::print_os_info(outputStream* st) {
1960 st->print("OS:");
1961
1962 os::Solaris::print_distro_info(st);
1963
1964 os::Posix::print_uname_info(st);
1965
1966 os::Solaris::print_libversion_info(st);
1967
1968 os::Posix::print_rlimit_info(st);
1969
1970 os::Posix::print_load_average(st);
1971 }
1972
1973 void os::Solaris::print_distro_info(outputStream* st) {
1974 if (!_print_ascii_file("/etc/release", st)) {
1975 st->print("Solaris");
1976 }
1977 st->cr();
1978 }
1979
1980 void os::Solaris::print_libversion_info(outputStream* st) {
1981 st->print(" (T2 libthread)");
1982 st->cr();
1983 }
1984
1985 static bool check_addr0(outputStream* st) {
1986 jboolean status = false;
1987 int fd = ::open("/proc/self/map",O_RDONLY);
1988 if (fd >= 0) {
1989 prmap_t p;
1990 while (::read(fd, &p, sizeof(p)) > 0) {
1991 if (p.pr_vaddr == 0x0) {
1992 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
1993 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
1994 st->print("Access:");
1995 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
1996 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
1997 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
1998 st->cr();
1999 status = true;
2000 }
2001 }
2002 ::close(fd);
2003 }
2004 return status;
2005 }
2006
2007 void os::pd_print_cpu_info(outputStream* st) {
2008 // Nothing to do for now.
2009 }
2010
2011 void os::print_memory_info(outputStream* st) {
2012 st->print("Memory:");
2013 st->print(" %dk page", os::vm_page_size()>>10);
2014 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2015 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2016 st->cr();
2017 (void) check_addr0(st);
2018 }
2019
2020 void os::print_siginfo(outputStream* st, void* siginfo) {
2021 const siginfo_t* si = (const siginfo_t*)siginfo;
2022
2023 os::Posix::print_siginfo_brief(st, si);
2024
2025 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2026 UseSharedSpaces) {
2027 FileMapInfo* mapinfo = FileMapInfo::current_info();
2028 if (mapinfo->is_in_shared_space(si->si_addr)) {
2029 st->print("\n\nError accessing class data sharing archive." \
2030 " Mapped file inaccessible during execution, " \
2031 " possible disk/network problem.");
2032 }
2033 }
2034 st->cr();
2035 }
2036
2037 // Moved from whole group, because we need them here for diagnostic
2038 // prints.
2039 #define OLDMAXSIGNUM 32
2040 static int Maxsignum = 0;
2041 static int *ourSigFlags = NULL;
2042
2043 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2044
2045 int os::Solaris::get_our_sigflags(int sig) {
2046 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2047 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2048 return ourSigFlags[sig];
2049 }
2050
2051 void os::Solaris::set_our_sigflags(int sig, int flags) {
2052 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2053 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2054 ourSigFlags[sig] = flags;
2055 }
2056
2057
2058 static const char* get_signal_handler_name(address handler,
2059 char* buf, int buflen) {
2060 int offset;
2061 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2062 if (found) {
2063 // skip directory names
2064 const char *p1, *p2;
2065 p1 = buf;
2066 size_t len = strlen(os::file_separator());
2067 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2068 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2069 } else {
2070 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2071 }
2072 return buf;
2073 }
2074
2075 static void print_signal_handler(outputStream* st, int sig,
2076 char* buf, size_t buflen) {
2077 struct sigaction sa;
2078
2079 sigaction(sig, NULL, &sa);
2080
2081 st->print("%s: ", os::exception_name(sig, buf, buflen));
2082
2083 address handler = (sa.sa_flags & SA_SIGINFO)
2084 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2085 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2086
2087 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2088 st->print("SIG_DFL");
2089 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2090 st->print("SIG_IGN");
2091 } else {
2092 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2093 }
2094
2095 st->print(", sa_mask[0]=");
2096 os::Posix::print_signal_set_short(st, &sa.sa_mask);
2097
2098 address rh = VMError::get_resetted_sighandler(sig);
2099 // May be, handler was resetted by VMError?
2100 if (rh != NULL) {
2101 handler = rh;
2102 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2103 }
2104
2105 st->print(", sa_flags=");
2106 os::Posix::print_sa_flags(st, sa.sa_flags);
2107
2108 // Check: is it our handler?
2109 if (handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2110 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2111 // It is our signal handler
2112 // check for flags
2113 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2114 st->print(
2115 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2116 os::Solaris::get_our_sigflags(sig));
2117 }
2118 }
2119 st->cr();
2120 }
2121
2122 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2123 st->print_cr("Signal Handlers:");
2124 print_signal_handler(st, SIGSEGV, buf, buflen);
2125 print_signal_handler(st, SIGBUS , buf, buflen);
2126 print_signal_handler(st, SIGFPE , buf, buflen);
2127 print_signal_handler(st, SIGPIPE, buf, buflen);
2128 print_signal_handler(st, SIGXFSZ, buf, buflen);
2129 print_signal_handler(st, SIGILL , buf, buflen);
2130 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2131 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2132 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2133 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2134 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2135 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2136 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2137 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2138 }
2139
2140 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2141
2142 // Find the full path to the current module, libjvm.so
2143 void os::jvm_path(char *buf, jint buflen) {
2144 // Error checking.
2145 if (buflen < MAXPATHLEN) {
2146 assert(false, "must use a large-enough buffer");
2147 buf[0] = '\0';
2148 return;
2149 }
2150 // Lazy resolve the path to current module.
2151 if (saved_jvm_path[0] != 0) {
2152 strcpy(buf, saved_jvm_path);
2153 return;
2154 }
2155
2156 Dl_info dlinfo;
2157 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2158 assert(ret != 0, "cannot locate libjvm");
2159 if (ret != 0 && dlinfo.dli_fname != NULL) {
2160 realpath((char *)dlinfo.dli_fname, buf);
2161 } else {
2162 buf[0] = '\0';
2163 return;
2164 }
2165
2166 if (Arguments::sun_java_launcher_is_altjvm()) {
2167 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical
2168 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".
2169 // If "/jre/lib/" appears at the right place in the string, then
2170 // assume we are installed in a JDK and we're done. Otherwise, check
2171 // for a JAVA_HOME environment variable and fix up the path so it
2172 // looks like libjvm.so is installed there (append a fake suffix
2173 // hotspot/libjvm.so).
2174 const char *p = buf + strlen(buf) - 1;
2175 for (int count = 0; p > buf && count < 5; ++count) {
2176 for (--p; p > buf && *p != '/'; --p)
2177 /* empty */ ;
2178 }
2179
2180 if (strncmp(p, "/jre/lib/", 9) != 0) {
2181 // Look for JAVA_HOME in the environment.
2182 char* java_home_var = ::getenv("JAVA_HOME");
2183 if (java_home_var != NULL && java_home_var[0] != 0) {
2184 char cpu_arch[12];
2185 char* jrelib_p;
2186 int len;
2187 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2188 #ifdef _LP64
2189 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2190 if (strcmp(cpu_arch, "sparc") == 0) {
2191 strcat(cpu_arch, "v9");
2192 } else if (strcmp(cpu_arch, "i386") == 0) {
2193 strcpy(cpu_arch, "amd64");
2194 }
2195 #endif
2196 // Check the current module name "libjvm.so".
2197 p = strrchr(buf, '/');
2198 assert(strstr(p, "/libjvm") == p, "invalid library name");
2199
2200 realpath(java_home_var, buf);
2201 // determine if this is a legacy image or modules image
2202 // modules image doesn't have "jre" subdirectory
2203 len = strlen(buf);
2204 assert(len < buflen, "Ran out of buffer space");
2205 jrelib_p = buf + len;
2206 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2207 if (0 != access(buf, F_OK)) {
2208 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2209 }
2210
2211 if (0 == access(buf, F_OK)) {
2212 // Use current module name "libjvm.so"
2213 len = strlen(buf);
2214 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
2215 } else {
2216 // Go back to path of .so
2217 realpath((char *)dlinfo.dli_fname, buf);
2218 }
2219 }
2220 }
2221 }
2222
2223 strncpy(saved_jvm_path, buf, MAXPATHLEN);
2224 }
2225
2226
2227 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2228 // no prefix required, not even "_"
2229 }
2230
2231
2232 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2233 // no suffix required
2234 }
2235
2236 // This method is a copy of JDK's sysGetLastErrorString
2237 // from src/solaris/hpi/src/system_md.c
2238
2239 size_t os::lasterror(char *buf, size_t len) {
2240 if (errno == 0) return 0;
2241
2242 const char *s = ::strerror(errno);
2243 size_t n = ::strlen(s);
2244 if (n >= len) {
2245 n = len - 1;
2246 }
2247 ::strncpy(buf, s, n);
2248 buf[n] = '\0';
2249 return n;
2250 }
2251
2252
2253 // sun.misc.Signal
2254
2255 extern "C" {
2256 static void UserHandler(int sig, void *siginfo, void *context) {
2257 // Ctrl-C is pressed during error reporting, likely because the error
2258 // handler fails to abort. Let VM die immediately.
2259 if (sig == SIGINT && is_error_reported()) {
2260 os::die();
2261 }
2262
2263 os::signal_notify(sig);
2264 // We do not need to reinstate the signal handler each time...
2265 }
2266 }
2267
2268 void* os::user_handler() {
2269 return CAST_FROM_FN_PTR(void*, UserHandler);
2270 }
2271
2272 class Semaphore : public StackObj {
2273 public:
2274 Semaphore();
2275 ~Semaphore();
2276 void signal();
2277 void wait();
2278 bool trywait();
2279 bool timedwait(unsigned int sec, int nsec);
2280 private:
2281 sema_t _semaphore;
2282 };
2283
2284
2285 Semaphore::Semaphore() {
2286 sema_init(&_semaphore, 0, NULL, NULL);
2287 }
2288
2289 Semaphore::~Semaphore() {
2290 sema_destroy(&_semaphore);
2291 }
2292
2293 void Semaphore::signal() {
2294 sema_post(&_semaphore);
2295 }
2296
2297 void Semaphore::wait() {
2298 sema_wait(&_semaphore);
2299 }
2300
2301 bool Semaphore::trywait() {
2302 return sema_trywait(&_semaphore) == 0;
2303 }
2304
2305 bool Semaphore::timedwait(unsigned int sec, int nsec) {
2306 struct timespec ts;
2307 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec);
2308
2309 while (1) {
2310 int result = sema_timedwait(&_semaphore, &ts);
2311 if (result == 0) {
2312 return true;
2313 } else if (errno == EINTR) {
2314 continue;
2315 } else if (errno == ETIME) {
2316 return false;
2317 } else {
2318 return false;
2319 }
2320 }
2321 }
2322
2323 extern "C" {
2324 typedef void (*sa_handler_t)(int);
2325 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2326 }
2327
2328 void* os::signal(int signal_number, void* handler) {
2329 struct sigaction sigAct, oldSigAct;
2330 sigfillset(&(sigAct.sa_mask));
2331 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2332 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2333
2334 if (sigaction(signal_number, &sigAct, &oldSigAct)) {
2335 // -1 means registration failed
2336 return (void *)-1;
2337 }
2338
2339 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2340 }
2341
2342 void os::signal_raise(int signal_number) {
2343 raise(signal_number);
2344 }
2345
2346 // The following code is moved from os.cpp for making this
2347 // code platform specific, which it is by its very nature.
2348
2349 // a counter for each possible signal value
2350 static int Sigexit = 0;
2351 static int Maxlibjsigsigs;
2352 static jint *pending_signals = NULL;
2353 static int *preinstalled_sigs = NULL;
2354 static struct sigaction *chainedsigactions = NULL;
2355 static sema_t sig_sem;
2356 typedef int (*version_getting_t)();
2357 version_getting_t os::Solaris::get_libjsig_version = NULL;
2358 static int libjsigversion = NULL;
2359
2360 int os::sigexitnum_pd() {
2361 assert(Sigexit > 0, "signal memory not yet initialized");
2362 return Sigexit;
2363 }
2364
2365 void os::Solaris::init_signal_mem() {
2366 // Initialize signal structures
2367 Maxsignum = SIGRTMAX;
2368 Sigexit = Maxsignum+1;
2369 assert(Maxsignum >0, "Unable to obtain max signal number");
2370
2371 Maxlibjsigsigs = Maxsignum;
2372
2373 // pending_signals has one int per signal
2374 // The additional signal is for SIGEXIT - exit signal to signal_thread
2375 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2376 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2377
2378 if (UseSignalChaining) {
2379 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2380 * (Maxsignum + 1), mtInternal);
2381 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2382 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2383 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2384 }
2385 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2386 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2387 }
2388
2389 void os::signal_init_pd() {
2390 int ret;
2391
2392 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2393 assert(ret == 0, "sema_init() failed");
2394 }
2395
2396 void os::signal_notify(int signal_number) {
2397 int ret;
2398
2399 Atomic::inc(&pending_signals[signal_number]);
2400 ret = ::sema_post(&sig_sem);
2401 assert(ret == 0, "sema_post() failed");
2402 }
2403
2404 static int check_pending_signals(bool wait_for_signal) {
2405 int ret;
2406 while (true) {
2407 for (int i = 0; i < Sigexit + 1; i++) {
2408 jint n = pending_signals[i];
2409 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2410 return i;
2411 }
2412 }
2413 if (!wait_for_signal) {
2414 return -1;
2415 }
2416 JavaThread *thread = JavaThread::current();
2417 ThreadBlockInVM tbivm(thread);
2418
2419 bool threadIsSuspended;
2420 do {
2421 thread->set_suspend_equivalent();
2422 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2423 while ((ret = ::sema_wait(&sig_sem)) == EINTR)
2424 ;
2425 assert(ret == 0, "sema_wait() failed");
2426
2427 // were we externally suspended while we were waiting?
2428 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2429 if (threadIsSuspended) {
2430 // The semaphore has been incremented, but while we were waiting
2431 // another thread suspended us. We don't want to continue running
2432 // while suspended because that would surprise the thread that
2433 // suspended us.
2434 ret = ::sema_post(&sig_sem);
2435 assert(ret == 0, "sema_post() failed");
2436
2437 thread->java_suspend_self();
2438 }
2439 } while (threadIsSuspended);
2440 }
2441 }
2442
2443 int os::signal_lookup() {
2444 return check_pending_signals(false);
2445 }
2446
2447 int os::signal_wait() {
2448 return check_pending_signals(true);
2449 }
2450
2451 ////////////////////////////////////////////////////////////////////////////////
2452 // Virtual Memory
2453
2454 static int page_size = -1;
2455
2456 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2457 // clear this var if support is not available.
2458 static bool has_map_align = true;
2459
2460 int os::vm_page_size() {
2461 assert(page_size != -1, "must call os::init");
2462 return page_size;
2463 }
2464
2465 // Solaris allocates memory by pages.
2466 int os::vm_allocation_granularity() {
2467 assert(page_size != -1, "must call os::init");
2468 return page_size;
2469 }
2470
2471 static bool recoverable_mmap_error(int err) {
2472 // See if the error is one we can let the caller handle. This
2473 // list of errno values comes from the Solaris mmap(2) man page.
2474 switch (err) {
2475 case EBADF:
2476 case EINVAL:
2477 case ENOTSUP:
2478 // let the caller deal with these errors
2479 return true;
2480
2481 default:
2482 // Any remaining errors on this OS can cause our reserved mapping
2483 // to be lost. That can cause confusion where different data
2484 // structures think they have the same memory mapped. The worst
2485 // scenario is if both the VM and a library think they have the
2486 // same memory mapped.
2487 return false;
2488 }
2489 }
2490
2491 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec,
2492 int err) {
2493 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2494 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec,
2495 strerror(err), err);
2496 }
2497
2498 static void warn_fail_commit_memory(char* addr, size_t bytes,
2499 size_t alignment_hint, bool exec,
2500 int err) {
2501 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2502 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes,
2503 alignment_hint, exec, strerror(err), err);
2504 }
2505
2506 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) {
2507 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2508 size_t size = bytes;
2509 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2510 if (res != NULL) {
2511 if (UseNUMAInterleaving) {
2512 numa_make_global(addr, bytes);
2513 }
2514 return 0;
2515 }
2516
2517 int err = errno; // save errno from mmap() call in mmap_chunk()
2518
2519 if (!recoverable_mmap_error(err)) {
2520 warn_fail_commit_memory(addr, bytes, exec, err);
2521 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory.");
2522 }
2523
2524 return err;
2525 }
2526
2527 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2528 return Solaris::commit_memory_impl(addr, bytes, exec) == 0;
2529 }
2530
2531 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec,
2532 const char* mesg) {
2533 assert(mesg != NULL, "mesg must be specified");
2534 int err = os::Solaris::commit_memory_impl(addr, bytes, exec);
2535 if (err != 0) {
2536 // the caller wants all commit errors to exit with the specified mesg:
2537 warn_fail_commit_memory(addr, bytes, exec, err);
2538 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2539 }
2540 }
2541
2542 size_t os::Solaris::page_size_for_alignment(size_t alignment) {
2543 assert(is_size_aligned(alignment, (size_t) vm_page_size()),
2544 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT,
2545 alignment, (size_t) vm_page_size()));
2546
2547 for (int i = 0; _page_sizes[i] != 0; i++) {
2548 if (is_size_aligned(alignment, _page_sizes[i])) {
2549 return _page_sizes[i];
2550 }
2551 }
2552
2553 return (size_t) vm_page_size();
2554 }
2555
2556 int os::Solaris::commit_memory_impl(char* addr, size_t bytes,
2557 size_t alignment_hint, bool exec) {
2558 int err = Solaris::commit_memory_impl(addr, bytes, exec);
2559 if (err == 0 && UseLargePages && alignment_hint > 0) {
2560 assert(is_size_aligned(bytes, alignment_hint),
2561 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint));
2562
2563 // The syscall memcntl requires an exact page size (see man memcntl for details).
2564 size_t page_size = page_size_for_alignment(alignment_hint);
2565 if (page_size > (size_t) vm_page_size()) {
2566 (void)Solaris::setup_large_pages(addr, bytes, page_size);
2567 }
2568 }
2569 return err;
2570 }
2571
2572 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2573 bool exec) {
2574 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0;
2575 }
2576
2577 void os::pd_commit_memory_or_exit(char* addr, size_t bytes,
2578 size_t alignment_hint, bool exec,
2579 const char* mesg) {
2580 assert(mesg != NULL, "mesg must be specified");
2581 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec);
2582 if (err != 0) {
2583 // the caller wants all commit errors to exit with the specified mesg:
2584 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err);
2585 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2586 }
2587 }
2588
2589 // Uncommit the pages in a specified region.
2590 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2591 if (madvise(addr, bytes, MADV_FREE) < 0) {
2592 debug_only(warning("MADV_FREE failed."));
2593 return;
2594 }
2595 }
2596
2597 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2598 return os::commit_memory(addr, size, !ExecMem);
2599 }
2600
2601 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2602 return os::uncommit_memory(addr, size);
2603 }
2604
2605 // Change the page size in a given range.
2606 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2607 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2608 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2609 if (UseLargePages) {
2610 Solaris::setup_large_pages(addr, bytes, alignment_hint);
2611 }
2612 }
2613
2614 // Tell the OS to make the range local to the first-touching LWP
2615 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2616 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2617 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2618 debug_only(warning("MADV_ACCESS_LWP failed."));
2619 }
2620 }
2621
2622 // Tell the OS that this range would be accessed from different LWPs.
2623 void os::numa_make_global(char *addr, size_t bytes) {
2624 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2625 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2626 debug_only(warning("MADV_ACCESS_MANY failed."));
2627 }
2628 }
2629
2630 // Get the number of the locality groups.
2631 size_t os::numa_get_groups_num() {
2632 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2633 return n != -1 ? n : 1;
2634 }
2635
2636 // Get a list of leaf locality groups. A leaf lgroup is group that
2637 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2638 // board. An LWP is assigned to one of these groups upon creation.
2639 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2640 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2641 ids[0] = 0;
2642 return 1;
2643 }
2644 int result_size = 0, top = 1, bottom = 0, cur = 0;
2645 for (int k = 0; k < size; k++) {
2646 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2647 (Solaris::lgrp_id_t*)&ids[top], size - top);
2648 if (r == -1) {
2649 ids[0] = 0;
2650 return 1;
2651 }
2652 if (!r) {
2653 // That's a leaf node.
2654 assert(bottom <= cur, "Sanity check");
2655 // Check if the node has memory
2656 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2657 NULL, 0, LGRP_RSRC_MEM) > 0) {
2658 ids[bottom++] = ids[cur];
2659 }
2660 }
2661 top += r;
2662 cur++;
2663 }
2664 if (bottom == 0) {
2665 // Handle a situation, when the OS reports no memory available.
2666 // Assume UMA architecture.
2667 ids[0] = 0;
2668 return 1;
2669 }
2670 return bottom;
2671 }
2672
2673 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2674 bool os::numa_topology_changed() {
2675 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2676 if (is_stale != -1 && is_stale) {
2677 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2678 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2679 assert(c != 0, "Failure to initialize LGRP API");
2680 Solaris::set_lgrp_cookie(c);
2681 return true;
2682 }
2683 return false;
2684 }
2685
2686 // Get the group id of the current LWP.
2687 int os::numa_get_group_id() {
2688 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2689 if (lgrp_id == -1) {
2690 return 0;
2691 }
2692 const int size = os::numa_get_groups_num();
2693 int *ids = (int*)alloca(size * sizeof(int));
2694
2695 // Get the ids of all lgroups with memory; r is the count.
2696 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2697 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2698 if (r <= 0) {
2699 return 0;
2700 }
2701 return ids[os::random() % r];
2702 }
2703
2704 // Request information about the page.
2705 bool os::get_page_info(char *start, page_info* info) {
2706 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2707 uint64_t addr = (uintptr_t)start;
2708 uint64_t outdata[2];
2709 uint_t validity = 0;
2710
2711 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2712 return false;
2713 }
2714
2715 info->size = 0;
2716 info->lgrp_id = -1;
2717
2718 if ((validity & 1) != 0) {
2719 if ((validity & 2) != 0) {
2720 info->lgrp_id = outdata[0];
2721 }
2722 if ((validity & 4) != 0) {
2723 info->size = outdata[1];
2724 }
2725 return true;
2726 }
2727 return false;
2728 }
2729
2730 // Scan the pages from start to end until a page different than
2731 // the one described in the info parameter is encountered.
2732 char *os::scan_pages(char *start, char* end, page_info* page_expected,
2733 page_info* page_found) {
2734 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2735 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2736 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1];
2737 uint_t validity[MAX_MEMINFO_CNT];
2738
2739 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2740 uint64_t p = (uint64_t)start;
2741 while (p < (uint64_t)end) {
2742 addrs[0] = p;
2743 size_t addrs_count = 1;
2744 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2745 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2746 addrs_count++;
2747 }
2748
2749 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2750 return NULL;
2751 }
2752
2753 size_t i = 0;
2754 for (; i < addrs_count; i++) {
2755 if ((validity[i] & 1) != 0) {
2756 if ((validity[i] & 4) != 0) {
2757 if (outdata[types * i + 1] != page_expected->size) {
2758 break;
2759 }
2760 } else if (page_expected->size != 0) {
2761 break;
2762 }
2763
2764 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2765 if (outdata[types * i] != page_expected->lgrp_id) {
2766 break;
2767 }
2768 }
2769 } else {
2770 return NULL;
2771 }
2772 }
2773
2774 if (i < addrs_count) {
2775 if ((validity[i] & 2) != 0) {
2776 page_found->lgrp_id = outdata[types * i];
2777 } else {
2778 page_found->lgrp_id = -1;
2779 }
2780 if ((validity[i] & 4) != 0) {
2781 page_found->size = outdata[types * i + 1];
2782 } else {
2783 page_found->size = 0;
2784 }
2785 return (char*)addrs[i];
2786 }
2787
2788 p = addrs[addrs_count - 1] + page_size;
2789 }
2790 return end;
2791 }
2792
2793 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2794 size_t size = bytes;
2795 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2796 // uncommitted page. Otherwise, the read/write might succeed if we
2797 // have enough swap space to back the physical page.
2798 return
2799 NULL != Solaris::mmap_chunk(addr, size,
2800 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2801 PROT_NONE);
2802 }
2803
2804 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2805 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2806
2807 if (b == MAP_FAILED) {
2808 return NULL;
2809 }
2810 return b;
2811 }
2812
2813 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes,
2814 size_t alignment_hint, bool fixed) {
2815 char* addr = requested_addr;
2816 int flags = MAP_PRIVATE | MAP_NORESERVE;
2817
2818 assert(!(fixed && (alignment_hint > 0)),
2819 "alignment hint meaningless with fixed mmap");
2820
2821 if (fixed) {
2822 flags |= MAP_FIXED;
2823 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
2824 flags |= MAP_ALIGN;
2825 addr = (char*) alignment_hint;
2826 }
2827
2828 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2829 // uncommitted page. Otherwise, the read/write might succeed if we
2830 // have enough swap space to back the physical page.
2831 return mmap_chunk(addr, bytes, flags, PROT_NONE);
2832 }
2833
2834 char* os::pd_reserve_memory(size_t bytes, char* requested_addr,
2835 size_t alignment_hint) {
2836 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint,
2837 (requested_addr != NULL));
2838
2839 guarantee(requested_addr == NULL || requested_addr == addr,
2840 "OS failed to return requested mmap address.");
2841 return addr;
2842 }
2843
2844 // Reserve memory at an arbitrary address, only if that area is
2845 // available (and not reserved for something else).
2846
2847 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2848 const int max_tries = 10;
2849 char* base[max_tries];
2850 size_t size[max_tries];
2851
2852 // Solaris adds a gap between mmap'ed regions. The size of the gap
2853 // is dependent on the requested size and the MMU. Our initial gap
2854 // value here is just a guess and will be corrected later.
2855 bool had_top_overlap = false;
2856 bool have_adjusted_gap = false;
2857 size_t gap = 0x400000;
2858
2859 // Assert only that the size is a multiple of the page size, since
2860 // that's all that mmap requires, and since that's all we really know
2861 // about at this low abstraction level. If we need higher alignment,
2862 // we can either pass an alignment to this method or verify alignment
2863 // in one of the methods further up the call chain. See bug 5044738.
2864 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
2865
2866 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
2867 // Give it a try, if the kernel honors the hint we can return immediately.
2868 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
2869
2870 volatile int err = errno;
2871 if (addr == requested_addr) {
2872 return addr;
2873 } else if (addr != NULL) {
2874 pd_unmap_memory(addr, bytes);
2875 }
2876
2877 if (PrintMiscellaneous && Verbose) {
2878 char buf[256];
2879 buf[0] = '\0';
2880 if (addr == NULL) {
2881 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
2882 }
2883 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
2884 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
2885 "%s", bytes, requested_addr, addr, buf);
2886 }
2887
2888 // Address hint method didn't work. Fall back to the old method.
2889 // In theory, once SNV becomes our oldest supported platform, this
2890 // code will no longer be needed.
2891 //
2892 // Repeatedly allocate blocks until the block is allocated at the
2893 // right spot. Give up after max_tries.
2894 int i;
2895 for (i = 0; i < max_tries; ++i) {
2896 base[i] = reserve_memory(bytes);
2897
2898 if (base[i] != NULL) {
2899 // Is this the block we wanted?
2900 if (base[i] == requested_addr) {
2901 size[i] = bytes;
2902 break;
2903 }
2904
2905 // check that the gap value is right
2906 if (had_top_overlap && !have_adjusted_gap) {
2907 size_t actual_gap = base[i-1] - base[i] - bytes;
2908 if (gap != actual_gap) {
2909 // adjust the gap value and retry the last 2 allocations
2910 assert(i > 0, "gap adjustment code problem");
2911 have_adjusted_gap = true; // adjust the gap only once, just in case
2912 gap = actual_gap;
2913 if (PrintMiscellaneous && Verbose) {
2914 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
2915 }
2916 unmap_memory(base[i], bytes);
2917 unmap_memory(base[i-1], size[i-1]);
2918 i-=2;
2919 continue;
2920 }
2921 }
2922
2923 // Does this overlap the block we wanted? Give back the overlapped
2924 // parts and try again.
2925 //
2926 // There is still a bug in this code: if top_overlap == bytes,
2927 // the overlap is offset from requested region by the value of gap.
2928 // In this case giving back the overlapped part will not work,
2929 // because we'll give back the entire block at base[i] and
2930 // therefore the subsequent allocation will not generate a new gap.
2931 // This could be fixed with a new algorithm that used larger
2932 // or variable size chunks to find the requested region -
2933 // but such a change would introduce additional complications.
2934 // It's rare enough that the planets align for this bug,
2935 // so we'll just wait for a fix for 6204603/5003415 which
2936 // will provide a mmap flag to allow us to avoid this business.
2937
2938 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
2939 if (top_overlap >= 0 && top_overlap < bytes) {
2940 had_top_overlap = true;
2941 unmap_memory(base[i], top_overlap);
2942 base[i] += top_overlap;
2943 size[i] = bytes - top_overlap;
2944 } else {
2945 size_t bottom_overlap = base[i] + bytes - requested_addr;
2946 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
2947 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
2948 warning("attempt_reserve_memory_at: possible alignment bug");
2949 }
2950 unmap_memory(requested_addr, bottom_overlap);
2951 size[i] = bytes - bottom_overlap;
2952 } else {
2953 size[i] = bytes;
2954 }
2955 }
2956 }
2957 }
2958
2959 // Give back the unused reserved pieces.
2960
2961 for (int j = 0; j < i; ++j) {
2962 if (base[j] != NULL) {
2963 unmap_memory(base[j], size[j]);
2964 }
2965 }
2966
2967 return (i < max_tries) ? requested_addr : NULL;
2968 }
2969
2970 bool os::pd_release_memory(char* addr, size_t bytes) {
2971 size_t size = bytes;
2972 return munmap(addr, size) == 0;
2973 }
2974
2975 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
2976 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
2977 "addr must be page aligned");
2978 int retVal = mprotect(addr, bytes, prot);
2979 return retVal == 0;
2980 }
2981
2982 // Protect memory (Used to pass readonly pages through
2983 // JNI GetArray<type>Elements with empty arrays.)
2984 // Also, used for serialization page and for compressed oops null pointer
2985 // checking.
2986 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
2987 bool is_committed) {
2988 unsigned int p = 0;
2989 switch (prot) {
2990 case MEM_PROT_NONE: p = PROT_NONE; break;
2991 case MEM_PROT_READ: p = PROT_READ; break;
2992 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
2993 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
2994 default:
2995 ShouldNotReachHere();
2996 }
2997 // is_committed is unused.
2998 return solaris_mprotect(addr, bytes, p);
2999 }
3000
3001 // guard_memory and unguard_memory only happens within stack guard pages.
3002 // Since ISM pertains only to the heap, guard and unguard memory should not
3003 /// happen with an ISM region.
3004 bool os::guard_memory(char* addr, size_t bytes) {
3005 return solaris_mprotect(addr, bytes, PROT_NONE);
3006 }
3007
3008 bool os::unguard_memory(char* addr, size_t bytes) {
3009 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3010 }
3011
3012 // Large page support
3013 static size_t _large_page_size = 0;
3014
3015 // Insertion sort for small arrays (descending order).
3016 static void insertion_sort_descending(size_t* array, int len) {
3017 for (int i = 0; i < len; i++) {
3018 size_t val = array[i];
3019 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3020 size_t tmp = array[key];
3021 array[key] = array[key - 1];
3022 array[key - 1] = tmp;
3023 }
3024 }
3025 }
3026
3027 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) {
3028 const unsigned int usable_count = VM_Version::page_size_count();
3029 if (usable_count == 1) {
3030 return false;
3031 }
3032
3033 // Find the right getpagesizes interface. When solaris 11 is the minimum
3034 // build platform, getpagesizes() (without the '2') can be called directly.
3035 typedef int (*gps_t)(size_t[], int);
3036 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3037 if (gps_func == NULL) {
3038 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3039 if (gps_func == NULL) {
3040 if (warn) {
3041 warning("MPSS is not supported by the operating system.");
3042 }
3043 return false;
3044 }
3045 }
3046
3047 // Fill the array of page sizes.
3048 int n = (*gps_func)(_page_sizes, page_sizes_max);
3049 assert(n > 0, "Solaris bug?");
3050
3051 if (n == page_sizes_max) {
3052 // Add a sentinel value (necessary only if the array was completely filled
3053 // since it is static (zeroed at initialization)).
3054 _page_sizes[--n] = 0;
3055 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3056 }
3057 assert(_page_sizes[n] == 0, "missing sentinel");
3058 trace_page_sizes("available page sizes", _page_sizes, n);
3059
3060 if (n == 1) return false; // Only one page size available.
3061
3062 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3063 // select up to usable_count elements. First sort the array, find the first
3064 // acceptable value, then copy the usable sizes to the top of the array and
3065 // trim the rest. Make sure to include the default page size :-).
3066 //
3067 // A better policy could get rid of the 4M limit by taking the sizes of the
3068 // important VM memory regions (java heap and possibly the code cache) into
3069 // account.
3070 insertion_sort_descending(_page_sizes, n);
3071 const size_t size_limit =
3072 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3073 int beg;
3074 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */;
3075 const int end = MIN2((int)usable_count, n) - 1;
3076 for (int cur = 0; cur < end; ++cur, ++beg) {
3077 _page_sizes[cur] = _page_sizes[beg];
3078 }
3079 _page_sizes[end] = vm_page_size();
3080 _page_sizes[end + 1] = 0;
3081
3082 if (_page_sizes[end] > _page_sizes[end - 1]) {
3083 // Default page size is not the smallest; sort again.
3084 insertion_sort_descending(_page_sizes, end + 1);
3085 }
3086 *page_size = _page_sizes[0];
3087
3088 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3089 return true;
3090 }
3091
3092 void os::large_page_init() {
3093 if (UseLargePages) {
3094 // print a warning if any large page related flag is specified on command line
3095 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3096 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3097
3098 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3099 }
3100 }
3101
3102 bool os::Solaris::is_valid_page_size(size_t bytes) {
3103 for (int i = 0; _page_sizes[i] != 0; i++) {
3104 if (_page_sizes[i] == bytes) {
3105 return true;
3106 }
3107 }
3108 return false;
3109 }
3110
3111 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) {
3112 assert(is_valid_page_size(align), err_msg(SIZE_FORMAT " is not a valid page size", align));
3113 assert(is_ptr_aligned((void*) start, align),
3114 err_msg(PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align));
3115 assert(is_size_aligned(bytes, align),
3116 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align));
3117
3118 // Signal to OS that we want large pages for addresses
3119 // from addr, addr + bytes
3120 struct memcntl_mha mpss_struct;
3121 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3122 mpss_struct.mha_pagesize = align;
3123 mpss_struct.mha_flags = 0;
3124 // Upon successful completion, memcntl() returns 0
3125 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) {
3126 debug_only(warning("Attempt to use MPSS failed."));
3127 return false;
3128 }
3129 return true;
3130 }
3131
3132 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) {
3133 fatal("os::reserve_memory_special should not be called on Solaris.");
3134 return NULL;
3135 }
3136
3137 bool os::release_memory_special(char* base, size_t bytes) {
3138 fatal("os::release_memory_special should not be called on Solaris.");
3139 return false;
3140 }
3141
3142 size_t os::large_page_size() {
3143 return _large_page_size;
3144 }
3145
3146 // MPSS allows application to commit large page memory on demand; with ISM
3147 // the entire memory region must be allocated as shared memory.
3148 bool os::can_commit_large_page_memory() {
3149 return true;
3150 }
3151
3152 bool os::can_execute_large_page_memory() {
3153 return true;
3154 }
3155
3156 // Read calls from inside the vm need to perform state transitions
3157 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3158 size_t res;
3159 JavaThread* thread = (JavaThread*)Thread::current();
3160 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3161 ThreadBlockInVM tbiv(thread);
3162 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3163 return res;
3164 }
3165
3166 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3167 size_t res;
3168 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
3169 "Assumed _thread_in_native");
3170 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3171 return res;
3172 }
3173
3174 void os::naked_short_sleep(jlong ms) {
3175 assert(ms < 1000, "Un-interruptable sleep, short time use only");
3176
3177 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but
3178 // Solaris requires -lrt for this.
3179 usleep((ms * 1000));
3180
3181 return;
3182 }
3183
3184 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3185 void os::infinite_sleep() {
3186 while (true) { // sleep forever ...
3187 ::sleep(100); // ... 100 seconds at a time
3188 }
3189 }
3190
3191 // Used to convert frequent JVM_Yield() to nops
3192 bool os::dont_yield() {
3193 if (DontYieldALot) {
3194 static hrtime_t last_time = 0;
3195 hrtime_t diff = getTimeNanos() - last_time;
3196
3197 if (diff < DontYieldALotInterval * 1000000) {
3198 return true;
3199 }
3200
3201 last_time += diff;
3202
3203 return false;
3204 } else {
3205 return false;
3206 }
3207 }
3208
3209 // Note that yield semantics are defined by the scheduling class to which
3210 // the thread currently belongs. Typically, yield will _not yield to
3211 // other equal or higher priority threads that reside on the dispatch queues
3212 // of other CPUs.
3213
3214 void os::naked_yield() {
3215 thr_yield();
3216 }
3217
3218 // Interface for setting lwp priorities. If we are using T2 libthread,
3219 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3220 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3221 // function is meaningless in this mode so we must adjust the real lwp's priority
3222 // The routines below implement the getting and setting of lwp priorities.
3223 //
3224 // Note: T2 is now the only supported libthread. UseBoundThreads flag is
3225 // being deprecated and all threads are now BoundThreads
3226 //
3227 // Note: There are three priority scales used on Solaris. Java priotities
3228 // which range from 1 to 10, libthread "thr_setprio" scale which range
3229 // from 0 to 127, and the current scheduling class of the process we
3230 // are running in. This is typically from -60 to +60.
3231 // The setting of the lwp priorities in done after a call to thr_setprio
3232 // so Java priorities are mapped to libthread priorities and we map from
3233 // the latter to lwp priorities. We don't keep priorities stored in
3234 // Java priorities since some of our worker threads want to set priorities
3235 // higher than all Java threads.
3236 //
3237 // For related information:
3238 // (1) man -s 2 priocntl
3239 // (2) man -s 4 priocntl
3240 // (3) man dispadmin
3241 // = librt.so
3242 // = libthread/common/rtsched.c - thrp_setlwpprio().
3243 // = ps -cL <pid> ... to validate priority.
3244 // = sched_get_priority_min and _max
3245 // pthread_create
3246 // sched_setparam
3247 // pthread_setschedparam
3248 //
3249 // Assumptions:
3250 // + We assume that all threads in the process belong to the same
3251 // scheduling class. IE. an homogenous process.
3252 // + Must be root or in IA group to change change "interactive" attribute.
3253 // Priocntl() will fail silently. The only indication of failure is when
3254 // we read-back the value and notice that it hasn't changed.
3255 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3256 // + For RT, change timeslice as well. Invariant:
3257 // constant "priority integral"
3258 // Konst == TimeSlice * (60-Priority)
3259 // Given a priority, compute appropriate timeslice.
3260 // + Higher numerical values have higher priority.
3261
3262 // sched class attributes
3263 typedef struct {
3264 int schedPolicy; // classID
3265 int maxPrio;
3266 int minPrio;
3267 } SchedInfo;
3268
3269
3270 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3271
3272 #ifdef ASSERT
3273 static int ReadBackValidate = 1;
3274 #endif
3275 static int myClass = 0;
3276 static int myMin = 0;
3277 static int myMax = 0;
3278 static int myCur = 0;
3279 static bool priocntl_enable = false;
3280
3281 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3282 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3283
3284
3285 // lwp_priocntl_init
3286 //
3287 // Try to determine the priority scale for our process.
3288 //
3289 // Return errno or 0 if OK.
3290 //
3291 static int lwp_priocntl_init() {
3292 int rslt;
3293 pcinfo_t ClassInfo;
3294 pcparms_t ParmInfo;
3295 int i;
3296
3297 if (!UseThreadPriorities) return 0;
3298
3299 // If ThreadPriorityPolicy is 1, switch tables
3300 if (ThreadPriorityPolicy == 1) {
3301 for (i = 0; i < CriticalPriority+1; i++)
3302 os::java_to_os_priority[i] = prio_policy1[i];
3303 }
3304 if (UseCriticalJavaThreadPriority) {
3305 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3306 // See set_native_priority() and set_lwp_class_and_priority().
3307 // Save original MaxPriority mapping in case attempt to
3308 // use critical priority fails.
3309 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3310 // Set negative to distinguish from other priorities
3311 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3312 }
3313
3314 // Get IDs for a set of well-known scheduling classes.
3315 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3316 // the system. We should have a loop that iterates over the
3317 // classID values, which are known to be "small" integers.
3318
3319 strcpy(ClassInfo.pc_clname, "TS");
3320 ClassInfo.pc_cid = -1;
3321 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3322 if (rslt < 0) return errno;
3323 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3324 tsLimits.schedPolicy = ClassInfo.pc_cid;
3325 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3326 tsLimits.minPrio = -tsLimits.maxPrio;
3327
3328 strcpy(ClassInfo.pc_clname, "IA");
3329 ClassInfo.pc_cid = -1;
3330 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3331 if (rslt < 0) return errno;
3332 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3333 iaLimits.schedPolicy = ClassInfo.pc_cid;
3334 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3335 iaLimits.minPrio = -iaLimits.maxPrio;
3336
3337 strcpy(ClassInfo.pc_clname, "RT");
3338 ClassInfo.pc_cid = -1;
3339 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3340 if (rslt < 0) return errno;
3341 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3342 rtLimits.schedPolicy = ClassInfo.pc_cid;
3343 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3344 rtLimits.minPrio = 0;
3345
3346 strcpy(ClassInfo.pc_clname, "FX");
3347 ClassInfo.pc_cid = -1;
3348 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3349 if (rslt < 0) return errno;
3350 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3351 fxLimits.schedPolicy = ClassInfo.pc_cid;
3352 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3353 fxLimits.minPrio = 0;
3354
3355 // Query our "current" scheduling class.
3356 // This will normally be IA, TS or, rarely, FX or RT.
3357 memset(&ParmInfo, 0, sizeof(ParmInfo));
3358 ParmInfo.pc_cid = PC_CLNULL;
3359 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3360 if (rslt < 0) return errno;
3361 myClass = ParmInfo.pc_cid;
3362
3363 // We now know our scheduling classId, get specific information
3364 // about the class.
3365 ClassInfo.pc_cid = myClass;
3366 ClassInfo.pc_clname[0] = 0;
3367 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3368 if (rslt < 0) return errno;
3369
3370 if (ThreadPriorityVerbose) {
3371 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3372 }
3373
3374 memset(&ParmInfo, 0, sizeof(pcparms_t));
3375 ParmInfo.pc_cid = PC_CLNULL;
3376 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3377 if (rslt < 0) return errno;
3378
3379 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3380 myMin = rtLimits.minPrio;
3381 myMax = rtLimits.maxPrio;
3382 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3383 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3384 myMin = iaLimits.minPrio;
3385 myMax = iaLimits.maxPrio;
3386 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3387 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3388 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3389 myMin = tsLimits.minPrio;
3390 myMax = tsLimits.maxPrio;
3391 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3392 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3393 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3394 myMin = fxLimits.minPrio;
3395 myMax = fxLimits.maxPrio;
3396 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3397 } else {
3398 // No clue - punt
3399 if (ThreadPriorityVerbose) {
3400 tty->print_cr("Unknown scheduling class: %s ... \n",
3401 ClassInfo.pc_clname);
3402 }
3403 return EINVAL; // no clue, punt
3404 }
3405
3406 if (ThreadPriorityVerbose) {
3407 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax);
3408 }
3409
3410 priocntl_enable = true; // Enable changing priorities
3411 return 0;
3412 }
3413
3414 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3415 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3416 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3417 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3418
3419
3420 // scale_to_lwp_priority
3421 //
3422 // Convert from the libthread "thr_setprio" scale to our current
3423 // lwp scheduling class scale.
3424 //
3425 static int scale_to_lwp_priority(int rMin, int rMax, int x) {
3426 int v;
3427
3428 if (x == 127) return rMax; // avoid round-down
3429 v = (((x*(rMax-rMin)))/128)+rMin;
3430 return v;
3431 }
3432
3433
3434 // set_lwp_class_and_priority
3435 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3436 int newPrio, int new_class, bool scale) {
3437 int rslt;
3438 int Actual, Expected, prv;
3439 pcparms_t ParmInfo; // for GET-SET
3440 #ifdef ASSERT
3441 pcparms_t ReadBack; // for readback
3442 #endif
3443
3444 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3445 // Query current values.
3446 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3447 // Cache "pcparms_t" in global ParmCache.
3448 // TODO: elide set-to-same-value
3449
3450 // If something went wrong on init, don't change priorities.
3451 if (!priocntl_enable) {
3452 if (ThreadPriorityVerbose) {
3453 tty->print_cr("Trying to set priority but init failed, ignoring");
3454 }
3455 return EINVAL;
3456 }
3457
3458 // If lwp hasn't started yet, just return
3459 // the _start routine will call us again.
3460 if (lwpid <= 0) {
3461 if (ThreadPriorityVerbose) {
3462 tty->print_cr("deferring the set_lwp_class_and_priority of thread "
3463 INTPTR_FORMAT " to %d, lwpid not set",
3464 ThreadID, newPrio);
3465 }
3466 return 0;
3467 }
3468
3469 if (ThreadPriorityVerbose) {
3470 tty->print_cr ("set_lwp_class_and_priority("
3471 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3472 ThreadID, lwpid, newPrio);
3473 }
3474
3475 memset(&ParmInfo, 0, sizeof(pcparms_t));
3476 ParmInfo.pc_cid = PC_CLNULL;
3477 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3478 if (rslt < 0) return errno;
3479
3480 int cur_class = ParmInfo.pc_cid;
3481 ParmInfo.pc_cid = (id_t)new_class;
3482
3483 if (new_class == rtLimits.schedPolicy) {
3484 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3485 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3486 rtLimits.maxPrio, newPrio)
3487 : newPrio;
3488 rtInfo->rt_tqsecs = RT_NOCHANGE;
3489 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3490 if (ThreadPriorityVerbose) {
3491 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3492 }
3493 } else if (new_class == iaLimits.schedPolicy) {
3494 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3495 int maxClamped = MIN2(iaLimits.maxPrio,
3496 cur_class == new_class
3497 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3498 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3499 maxClamped, newPrio)
3500 : newPrio;
3501 iaInfo->ia_uprilim = cur_class == new_class
3502 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3503 iaInfo->ia_mode = IA_NOCHANGE;
3504 if (ThreadPriorityVerbose) {
3505 tty->print_cr("IA: [%d...%d] %d->%d\n",
3506 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3507 }
3508 } else if (new_class == tsLimits.schedPolicy) {
3509 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3510 int maxClamped = MIN2(tsLimits.maxPrio,
3511 cur_class == new_class
3512 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3513 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3514 maxClamped, newPrio)
3515 : newPrio;
3516 tsInfo->ts_uprilim = cur_class == new_class
3517 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3518 if (ThreadPriorityVerbose) {
3519 tty->print_cr("TS: [%d...%d] %d->%d\n",
3520 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3521 }
3522 } else if (new_class == fxLimits.schedPolicy) {
3523 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3524 int maxClamped = MIN2(fxLimits.maxPrio,
3525 cur_class == new_class
3526 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3527 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3528 maxClamped, newPrio)
3529 : newPrio;
3530 fxInfo->fx_uprilim = cur_class == new_class
3531 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
3532 fxInfo->fx_tqsecs = FX_NOCHANGE;
3533 fxInfo->fx_tqnsecs = FX_NOCHANGE;
3534 if (ThreadPriorityVerbose) {
3535 tty->print_cr("FX: [%d...%d] %d->%d\n",
3536 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
3537 }
3538 } else {
3539 if (ThreadPriorityVerbose) {
3540 tty->print_cr("Unknown new scheduling class %d\n", new_class);
3541 }
3542 return EINVAL; // no clue, punt
3543 }
3544
3545 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3546 if (ThreadPriorityVerbose && rslt) {
3547 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3548 }
3549 if (rslt < 0) return errno;
3550
3551 #ifdef ASSERT
3552 // Sanity check: read back what we just attempted to set.
3553 // In theory it could have changed in the interim ...
3554 //
3555 // The priocntl system call is tricky.
3556 // Sometimes it'll validate the priority value argument and
3557 // return EINVAL if unhappy. At other times it fails silently.
3558 // Readbacks are prudent.
3559
3560 if (!ReadBackValidate) return 0;
3561
3562 memset(&ReadBack, 0, sizeof(pcparms_t));
3563 ReadBack.pc_cid = PC_CLNULL;
3564 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3565 assert(rslt >= 0, "priocntl failed");
3566 Actual = Expected = 0xBAD;
3567 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3568 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3569 Actual = RTPRI(ReadBack)->rt_pri;
3570 Expected = RTPRI(ParmInfo)->rt_pri;
3571 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3572 Actual = IAPRI(ReadBack)->ia_upri;
3573 Expected = IAPRI(ParmInfo)->ia_upri;
3574 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3575 Actual = TSPRI(ReadBack)->ts_upri;
3576 Expected = TSPRI(ParmInfo)->ts_upri;
3577 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3578 Actual = FXPRI(ReadBack)->fx_upri;
3579 Expected = FXPRI(ParmInfo)->fx_upri;
3580 } else {
3581 if (ThreadPriorityVerbose) {
3582 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
3583 ParmInfo.pc_cid);
3584 }
3585 }
3586
3587 if (Actual != Expected) {
3588 if (ThreadPriorityVerbose) {
3589 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3590 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3591 }
3592 }
3593 #endif
3594
3595 return 0;
3596 }
3597
3598 // Solaris only gives access to 128 real priorities at a time,
3599 // so we expand Java's ten to fill this range. This would be better
3600 // if we dynamically adjusted relative priorities.
3601 //
3602 // The ThreadPriorityPolicy option allows us to select 2 different
3603 // priority scales.
3604 //
3605 // ThreadPriorityPolicy=0
3606 // Since the Solaris' default priority is MaximumPriority, we do not
3607 // set a priority lower than Max unless a priority lower than
3608 // NormPriority is requested.
3609 //
3610 // ThreadPriorityPolicy=1
3611 // This mode causes the priority table to get filled with
3612 // linear values. NormPriority get's mapped to 50% of the
3613 // Maximum priority an so on. This will cause VM threads
3614 // to get unfair treatment against other Solaris processes
3615 // which do not explicitly alter their thread priorities.
3616
3617 int os::java_to_os_priority[CriticalPriority + 1] = {
3618 -99999, // 0 Entry should never be used
3619
3620 0, // 1 MinPriority
3621 32, // 2
3622 64, // 3
3623
3624 96, // 4
3625 127, // 5 NormPriority
3626 127, // 6
3627
3628 127, // 7
3629 127, // 8
3630 127, // 9 NearMaxPriority
3631
3632 127, // 10 MaxPriority
3633
3634 -criticalPrio // 11 CriticalPriority
3635 };
3636
3637 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3638 OSThread* osthread = thread->osthread();
3639
3640 // Save requested priority in case the thread hasn't been started
3641 osthread->set_native_priority(newpri);
3642
3643 // Check for critical priority request
3644 bool fxcritical = false;
3645 if (newpri == -criticalPrio) {
3646 fxcritical = true;
3647 newpri = criticalPrio;
3648 }
3649
3650 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3651 if (!UseThreadPriorities) return OS_OK;
3652
3653 int status = 0;
3654
3655 if (!fxcritical) {
3656 // Use thr_setprio only if we have a priority that thr_setprio understands
3657 status = thr_setprio(thread->osthread()->thread_id(), newpri);
3658 }
3659
3660 int lwp_status =
3661 set_lwp_class_and_priority(osthread->thread_id(),
3662 osthread->lwp_id(),
3663 newpri,
3664 fxcritical ? fxLimits.schedPolicy : myClass,
3665 !fxcritical);
3666 if (lwp_status != 0 && fxcritical) {
3667 // Try again, this time without changing the scheduling class
3668 newpri = java_MaxPriority_to_os_priority;
3669 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
3670 osthread->lwp_id(),
3671 newpri, myClass, false);
3672 }
3673 status |= lwp_status;
3674 return (status == 0) ? OS_OK : OS_ERR;
3675 }
3676
3677
3678 OSReturn os::get_native_priority(const Thread* const thread,
3679 int *priority_ptr) {
3680 int p;
3681 if (!UseThreadPriorities) {
3682 *priority_ptr = NormalPriority;
3683 return OS_OK;
3684 }
3685 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3686 if (status != 0) {
3687 return OS_ERR;
3688 }
3689 *priority_ptr = p;
3690 return OS_OK;
3691 }
3692
3693
3694 // Hint to the underlying OS that a task switch would not be good.
3695 // Void return because it's a hint and can fail.
3696 void os::hint_no_preempt() {
3697 schedctl_start(schedctl_init());
3698 }
3699
3700 static void resume_clear_context(OSThread *osthread) {
3701 osthread->set_ucontext(NULL);
3702 }
3703
3704 static void suspend_save_context(OSThread *osthread, ucontext_t* context) {
3705 osthread->set_ucontext(context);
3706 }
3707
3708 static Semaphore sr_semaphore;
3709
3710 void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) {
3711 // Save and restore errno to avoid confusing native code with EINTR
3712 // after sigsuspend.
3713 int old_errno = errno;
3714
3715 OSThread* osthread = thread->osthread();
3716 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
3717
3718 os::SuspendResume::State current = osthread->sr.state();
3719 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
3720 suspend_save_context(osthread, uc);
3721
3722 // attempt to switch the state, we assume we had a SUSPEND_REQUEST
3723 os::SuspendResume::State state = osthread->sr.suspended();
3724 if (state == os::SuspendResume::SR_SUSPENDED) {
3725 sigset_t suspend_set; // signals for sigsuspend()
3726
3727 // get current set of blocked signals and unblock resume signal
3728 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set);
3729 sigdelset(&suspend_set, os::Solaris::SIGasync());
3730
3731 sr_semaphore.signal();
3732 // wait here until we are resumed
3733 while (1) {
3734 sigsuspend(&suspend_set);
3735
3736 os::SuspendResume::State result = osthread->sr.running();
3737 if (result == os::SuspendResume::SR_RUNNING) {
3738 sr_semaphore.signal();
3739 break;
3740 }
3741 }
3742
3743 } else if (state == os::SuspendResume::SR_RUNNING) {
3744 // request was cancelled, continue
3745 } else {
3746 ShouldNotReachHere();
3747 }
3748
3749 resume_clear_context(osthread);
3750 } else if (current == os::SuspendResume::SR_RUNNING) {
3751 // request was cancelled, continue
3752 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
3753 // ignore
3754 } else {
3755 // ignore
3756 }
3757
3758 errno = old_errno;
3759 }
3760
3761 void os::print_statistics() {
3762 }
3763
3764 int os::message_box(const char* title, const char* message) {
3765 int i;
3766 fdStream err(defaultStream::error_fd());
3767 for (i = 0; i < 78; i++) err.print_raw("=");
3768 err.cr();
3769 err.print_raw_cr(title);
3770 for (i = 0; i < 78; i++) err.print_raw("-");
3771 err.cr();
3772 err.print_raw_cr(message);
3773 for (i = 0; i < 78; i++) err.print_raw("=");
3774 err.cr();
3775
3776 char buf[16];
3777 // Prevent process from exiting upon "read error" without consuming all CPU
3778 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3779
3780 return buf[0] == 'y' || buf[0] == 'Y';
3781 }
3782
3783 static int sr_notify(OSThread* osthread) {
3784 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync());
3785 assert_status(status == 0, status, "thr_kill");
3786 return status;
3787 }
3788
3789 // "Randomly" selected value for how long we want to spin
3790 // before bailing out on suspending a thread, also how often
3791 // we send a signal to a thread we want to resume
3792 static const int RANDOMLY_LARGE_INTEGER = 1000000;
3793 static const int RANDOMLY_LARGE_INTEGER2 = 100;
3794
3795 static bool do_suspend(OSThread* osthread) {
3796 assert(osthread->sr.is_running(), "thread should be running");
3797 assert(!sr_semaphore.trywait(), "semaphore has invalid state");
3798
3799 // mark as suspended and send signal
3800 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
3801 // failed to switch, state wasn't running?
3802 ShouldNotReachHere();
3803 return false;
3804 }
3805
3806 if (sr_notify(osthread) != 0) {
3807 ShouldNotReachHere();
3808 }
3809
3810 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
3811 while (true) {
3812 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) {
3813 break;
3814 } else {
3815 // timeout
3816 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
3817 if (cancelled == os::SuspendResume::SR_RUNNING) {
3818 return false;
3819 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
3820 // make sure that we consume the signal on the semaphore as well
3821 sr_semaphore.wait();
3822 break;
3823 } else {
3824 ShouldNotReachHere();
3825 return false;
3826 }
3827 }
3828 }
3829
3830 guarantee(osthread->sr.is_suspended(), "Must be suspended");
3831 return true;
3832 }
3833
3834 static void do_resume(OSThread* osthread) {
3835 assert(osthread->sr.is_suspended(), "thread should be suspended");
3836 assert(!sr_semaphore.trywait(), "invalid semaphore state");
3837
3838 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
3839 // failed to switch to WAKEUP_REQUEST
3840 ShouldNotReachHere();
3841 return;
3842 }
3843
3844 while (true) {
3845 if (sr_notify(osthread) == 0) {
3846 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) {
3847 if (osthread->sr.is_running()) {
3848 return;
3849 }
3850 }
3851 } else {
3852 ShouldNotReachHere();
3853 }
3854 }
3855
3856 guarantee(osthread->sr.is_running(), "Must be running!");
3857 }
3858
3859 void os::SuspendedThreadTask::internal_do_task() {
3860 if (do_suspend(_thread->osthread())) {
3861 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
3862 do_task(context);
3863 do_resume(_thread->osthread());
3864 }
3865 }
3866
3867 class PcFetcher : public os::SuspendedThreadTask {
3868 public:
3869 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {}
3870 ExtendedPC result();
3871 protected:
3872 void do_task(const os::SuspendedThreadTaskContext& context);
3873 private:
3874 ExtendedPC _epc;
3875 };
3876
3877 ExtendedPC PcFetcher::result() {
3878 guarantee(is_done(), "task is not done yet.");
3879 return _epc;
3880 }
3881
3882 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) {
3883 Thread* thread = context.thread();
3884 OSThread* osthread = thread->osthread();
3885 if (osthread->ucontext() != NULL) {
3886 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext());
3887 } else {
3888 // NULL context is unexpected, double-check this is the VMThread
3889 guarantee(thread->is_VM_thread(), "can only be called for VMThread");
3890 }
3891 }
3892
3893 // A lightweight implementation that does not suspend the target thread and
3894 // thus returns only a hint. Used for profiling only!
3895 ExtendedPC os::get_thread_pc(Thread* thread) {
3896 // Make sure that it is called by the watcher and the Threads lock is owned.
3897 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
3898 // For now, is only used to profile the VM Thread
3899 assert(thread->is_VM_thread(), "Can only be called for VMThread");
3900 PcFetcher fetcher(thread);
3901 fetcher.run();
3902 return fetcher.result();
3903 }
3904
3905
3906 // This does not do anything on Solaris. This is basically a hook for being
3907 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
3908 void os::os_exception_wrapper(java_call_t f, JavaValue* value,
3909 methodHandle* method, JavaCallArguments* args,
3910 Thread* thread) {
3911 f(value, method, args, thread);
3912 }
3913
3914 // This routine may be used by user applications as a "hook" to catch signals.
3915 // The user-defined signal handler must pass unrecognized signals to this
3916 // routine, and if it returns true (non-zero), then the signal handler must
3917 // return immediately. If the flag "abort_if_unrecognized" is true, then this
3918 // routine will never retun false (zero), but instead will execute a VM panic
3919 // routine kill the process.
3920 //
3921 // If this routine returns false, it is OK to call it again. This allows
3922 // the user-defined signal handler to perform checks either before or after
3923 // the VM performs its own checks. Naturally, the user code would be making
3924 // a serious error if it tried to handle an exception (such as a null check
3925 // or breakpoint) that the VM was generating for its own correct operation.
3926 //
3927 // This routine may recognize any of the following kinds of signals:
3928 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
3929 // os::Solaris::SIGasync
3930 // It should be consulted by handlers for any of those signals.
3931 // It explicitly does not recognize os::Solaris::SIGinterrupt
3932 //
3933 // The caller of this routine must pass in the three arguments supplied
3934 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
3935 // field of the structure passed to sigaction(). This routine assumes that
3936 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
3937 //
3938 // Note that the VM will print warnings if it detects conflicting signal
3939 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
3940 //
3941 extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo,
3942 siginfo_t* siginfo,
3943 void* ucontext,
3944 int abort_if_unrecognized);
3945
3946
3947 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
3948 int orig_errno = errno; // Preserve errno value over signal handler.
3949 JVM_handle_solaris_signal(sig, info, ucVoid, true);
3950 errno = orig_errno;
3951 }
3952
3953 // Do not delete - if guarantee is ever removed, a signal handler (even empty)
3954 // is needed to provoke threads blocked on IO to return an EINTR
3955 // Note: this explicitly does NOT call JVM_handle_solaris_signal and
3956 // does NOT participate in signal chaining due to requirement for
3957 // NOT setting SA_RESTART to make EINTR work.
3958 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
3959 if (UseSignalChaining) {
3960 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
3961 if (actp && actp->sa_handler) {
3962 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
3963 }
3964 }
3965 }
3966
3967 // This boolean allows users to forward their own non-matching signals
3968 // to JVM_handle_solaris_signal, harmlessly.
3969 bool os::Solaris::signal_handlers_are_installed = false;
3970
3971 // For signal-chaining
3972 bool os::Solaris::libjsig_is_loaded = false;
3973 typedef struct sigaction *(*get_signal_t)(int);
3974 get_signal_t os::Solaris::get_signal_action = NULL;
3975
3976 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
3977 struct sigaction *actp = NULL;
3978
3979 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
3980 // Retrieve the old signal handler from libjsig
3981 actp = (*get_signal_action)(sig);
3982 }
3983 if (actp == NULL) {
3984 // Retrieve the preinstalled signal handler from jvm
3985 actp = get_preinstalled_handler(sig);
3986 }
3987
3988 return actp;
3989 }
3990
3991 static bool call_chained_handler(struct sigaction *actp, int sig,
3992 siginfo_t *siginfo, void *context) {
3993 // Call the old signal handler
3994 if (actp->sa_handler == SIG_DFL) {
3995 // It's more reasonable to let jvm treat it as an unexpected exception
3996 // instead of taking the default action.
3997 return false;
3998 } else if (actp->sa_handler != SIG_IGN) {
3999 if ((actp->sa_flags & SA_NODEFER) == 0) {
4000 // automaticlly block the signal
4001 sigaddset(&(actp->sa_mask), sig);
4002 }
4003
4004 sa_handler_t hand;
4005 sa_sigaction_t sa;
4006 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4007 // retrieve the chained handler
4008 if (siginfo_flag_set) {
4009 sa = actp->sa_sigaction;
4010 } else {
4011 hand = actp->sa_handler;
4012 }
4013
4014 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4015 actp->sa_handler = SIG_DFL;
4016 }
4017
4018 // try to honor the signal mask
4019 sigset_t oset;
4020 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4021
4022 // call into the chained handler
4023 if (siginfo_flag_set) {
4024 (*sa)(sig, siginfo, context);
4025 } else {
4026 (*hand)(sig);
4027 }
4028
4029 // restore the signal mask
4030 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4031 }
4032 // Tell jvm's signal handler the signal is taken care of.
4033 return true;
4034 }
4035
4036 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4037 bool chained = false;
4038 // signal-chaining
4039 if (UseSignalChaining) {
4040 struct sigaction *actp = get_chained_signal_action(sig);
4041 if (actp != NULL) {
4042 chained = call_chained_handler(actp, sig, siginfo, context);
4043 }
4044 }
4045 return chained;
4046 }
4047
4048 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4049 assert((chainedsigactions != (struct sigaction *)NULL) &&
4050 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4051 if (preinstalled_sigs[sig] != 0) {
4052 return &chainedsigactions[sig];
4053 }
4054 return NULL;
4055 }
4056
4057 void os::Solaris::save_preinstalled_handler(int sig,
4058 struct sigaction& oldAct) {
4059 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4060 assert((chainedsigactions != (struct sigaction *)NULL) &&
4061 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4062 chainedsigactions[sig] = oldAct;
4063 preinstalled_sigs[sig] = 1;
4064 }
4065
4066 void os::Solaris::set_signal_handler(int sig, bool set_installed,
4067 bool oktochain) {
4068 // Check for overwrite.
4069 struct sigaction oldAct;
4070 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4071 void* oldhand =
4072 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4073 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4074 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4075 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4076 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4077 if (AllowUserSignalHandlers || !set_installed) {
4078 // Do not overwrite; user takes responsibility to forward to us.
4079 return;
4080 } else if (UseSignalChaining) {
4081 if (oktochain) {
4082 // save the old handler in jvm
4083 save_preinstalled_handler(sig, oldAct);
4084 } else {
4085 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4086 }
4087 // libjsig also interposes the sigaction() call below and saves the
4088 // old sigaction on it own.
4089 } else {
4090 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4091 "%#lx for signal %d.", (long)oldhand, sig));
4092 }
4093 }
4094
4095 struct sigaction sigAct;
4096 sigfillset(&(sigAct.sa_mask));
4097 sigAct.sa_handler = SIG_DFL;
4098
4099 sigAct.sa_sigaction = signalHandler;
4100 // Handle SIGSEGV on alternate signal stack if
4101 // not using stack banging
4102 if (!UseStackBanging && sig == SIGSEGV) {
4103 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4104 } else if (sig == os::Solaris::SIGinterrupt()) {
4105 // Interruptible i/o requires SA_RESTART cleared so EINTR
4106 // is returned instead of restarting system calls
4107 sigemptyset(&sigAct.sa_mask);
4108 sigAct.sa_handler = NULL;
4109 sigAct.sa_flags = SA_SIGINFO;
4110 sigAct.sa_sigaction = sigINTRHandler;
4111 } else {
4112 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4113 }
4114 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4115
4116 sigaction(sig, &sigAct, &oldAct);
4117
4118 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4119 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4120 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4121 }
4122
4123
4124 #define DO_SIGNAL_CHECK(sig) \
4125 do { \
4126 if (!sigismember(&check_signal_done, sig)) { \
4127 os::Solaris::check_signal_handler(sig); \
4128 } \
4129 } while (0)
4130
4131 // This method is a periodic task to check for misbehaving JNI applications
4132 // under CheckJNI, we can add any periodic checks here
4133
4134 void os::run_periodic_checks() {
4135 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4136 // thereby preventing a NULL checks.
4137 if (!check_addr0_done) check_addr0_done = check_addr0(tty);
4138
4139 if (check_signals == false) return;
4140
4141 // SEGV and BUS if overridden could potentially prevent
4142 // generation of hs*.log in the event of a crash, debugging
4143 // such a case can be very challenging, so we absolutely
4144 // check for the following for a good measure:
4145 DO_SIGNAL_CHECK(SIGSEGV);
4146 DO_SIGNAL_CHECK(SIGILL);
4147 DO_SIGNAL_CHECK(SIGFPE);
4148 DO_SIGNAL_CHECK(SIGBUS);
4149 DO_SIGNAL_CHECK(SIGPIPE);
4150 DO_SIGNAL_CHECK(SIGXFSZ);
4151
4152 // ReduceSignalUsage allows the user to override these handlers
4153 // see comments at the very top and jvm_solaris.h
4154 if (!ReduceSignalUsage) {
4155 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4156 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4157 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4158 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4159 }
4160
4161 // See comments above for using JVM1/JVM2 and UseAltSigs
4162 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4163 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4164
4165 }
4166
4167 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4168
4169 static os_sigaction_t os_sigaction = NULL;
4170
4171 void os::Solaris::check_signal_handler(int sig) {
4172 char buf[O_BUFLEN];
4173 address jvmHandler = NULL;
4174
4175 struct sigaction act;
4176 if (os_sigaction == NULL) {
4177 // only trust the default sigaction, in case it has been interposed
4178 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4179 if (os_sigaction == NULL) return;
4180 }
4181
4182 os_sigaction(sig, (struct sigaction*)NULL, &act);
4183
4184 address thisHandler = (act.sa_flags & SA_SIGINFO)
4185 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4186 : CAST_FROM_FN_PTR(address, act.sa_handler);
4187
4188
4189 switch (sig) {
4190 case SIGSEGV:
4191 case SIGBUS:
4192 case SIGFPE:
4193 case SIGPIPE:
4194 case SIGXFSZ:
4195 case SIGILL:
4196 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4197 break;
4198
4199 case SHUTDOWN1_SIGNAL:
4200 case SHUTDOWN2_SIGNAL:
4201 case SHUTDOWN3_SIGNAL:
4202 case BREAK_SIGNAL:
4203 jvmHandler = (address)user_handler();
4204 break;
4205
4206 default:
4207 int intrsig = os::Solaris::SIGinterrupt();
4208 int asynsig = os::Solaris::SIGasync();
4209
4210 if (sig == intrsig) {
4211 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4212 } else if (sig == asynsig) {
4213 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4214 } else {
4215 return;
4216 }
4217 break;
4218 }
4219
4220
4221 if (thisHandler != jvmHandler) {
4222 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4223 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4224 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4225 // No need to check this sig any longer
4226 sigaddset(&check_signal_done, sig);
4227 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN
4228 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) {
4229 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell",
4230 exception_name(sig, buf, O_BUFLEN));
4231 }
4232 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4233 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4234 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4235 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4236 // No need to check this sig any longer
4237 sigaddset(&check_signal_done, sig);
4238 }
4239
4240 // Print all the signal handler state
4241 if (sigismember(&check_signal_done, sig)) {
4242 print_signal_handlers(tty, buf, O_BUFLEN);
4243 }
4244
4245 }
4246
4247 void os::Solaris::install_signal_handlers() {
4248 bool libjsigdone = false;
4249 signal_handlers_are_installed = true;
4250
4251 // signal-chaining
4252 typedef void (*signal_setting_t)();
4253 signal_setting_t begin_signal_setting = NULL;
4254 signal_setting_t end_signal_setting = NULL;
4255 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4256 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4257 if (begin_signal_setting != NULL) {
4258 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4259 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4260 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4261 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4262 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4263 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4264 libjsig_is_loaded = true;
4265 if (os::Solaris::get_libjsig_version != NULL) {
4266 libjsigversion = (*os::Solaris::get_libjsig_version)();
4267 }
4268 assert(UseSignalChaining, "should enable signal-chaining");
4269 }
4270 if (libjsig_is_loaded) {
4271 // Tell libjsig jvm is setting signal handlers
4272 (*begin_signal_setting)();
4273 }
4274
4275 set_signal_handler(SIGSEGV, true, true);
4276 set_signal_handler(SIGPIPE, true, true);
4277 set_signal_handler(SIGXFSZ, true, true);
4278 set_signal_handler(SIGBUS, true, true);
4279 set_signal_handler(SIGILL, true, true);
4280 set_signal_handler(SIGFPE, true, true);
4281
4282
4283 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4284
4285 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4286 // can not register overridable signals which might be > 32
4287 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4288 // Tell libjsig jvm has finished setting signal handlers
4289 (*end_signal_setting)();
4290 libjsigdone = true;
4291 }
4292 }
4293
4294 // Never ok to chain our SIGinterrupt
4295 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4296 set_signal_handler(os::Solaris::SIGasync(), true, true);
4297
4298 if (libjsig_is_loaded && !libjsigdone) {
4299 // Tell libjsig jvm finishes setting signal handlers
4300 (*end_signal_setting)();
4301 }
4302
4303 // We don't activate signal checker if libjsig is in place, we trust ourselves
4304 // and if UserSignalHandler is installed all bets are off.
4305 // Log that signal checking is off only if -verbose:jni is specified.
4306 if (CheckJNICalls) {
4307 if (libjsig_is_loaded) {
4308 if (PrintJNIResolving) {
4309 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4310 }
4311 check_signals = false;
4312 }
4313 if (AllowUserSignalHandlers) {
4314 if (PrintJNIResolving) {
4315 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4316 }
4317 check_signals = false;
4318 }
4319 }
4320 }
4321
4322
4323 void report_error(const char* file_name, int line_no, const char* title,
4324 const char* format, ...);
4325
4326 const char * signames[] = {
4327 "SIG0",
4328 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4329 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4330 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4331 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4332 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4333 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4334 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4335 "SIGCANCEL", "SIGLOST"
4336 };
4337
4338 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4339 if (0 < exception_code && exception_code <= SIGRTMAX) {
4340 // signal
4341 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4342 jio_snprintf(buf, size, "%s", signames[exception_code]);
4343 } else {
4344 jio_snprintf(buf, size, "SIG%d", exception_code);
4345 }
4346 return buf;
4347 } else {
4348 return NULL;
4349 }
4350 }
4351
4352 // (Static) wrapper for getisax(2) call.
4353 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4354
4355 // (Static) wrappers for the liblgrp API
4356 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4357 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4358 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4359 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4360 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4361 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4362 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4363 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4364 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4365
4366 // (Static) wrapper for meminfo() call.
4367 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4368
4369 static address resolve_symbol_lazy(const char* name) {
4370 address addr = (address) dlsym(RTLD_DEFAULT, name);
4371 if (addr == NULL) {
4372 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4373 addr = (address) dlsym(RTLD_NEXT, name);
4374 }
4375 return addr;
4376 }
4377
4378 static address resolve_symbol(const char* name) {
4379 address addr = resolve_symbol_lazy(name);
4380 if (addr == NULL) {
4381 fatal(dlerror());
4382 }
4383 return addr;
4384 }
4385
4386 void os::Solaris::libthread_init() {
4387 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4388
4389 lwp_priocntl_init();
4390
4391 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4392 if (func == NULL) {
4393 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4394 // Guarantee that this VM is running on an new enough OS (5.6 or
4395 // later) that it will have a new enough libthread.so.
4396 guarantee(func != NULL, "libthread.so is too old.");
4397 }
4398
4399 int size;
4400 void (*handler_info_func)(address *, int *);
4401 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4402 handler_info_func(&handler_start, &size);
4403 handler_end = handler_start + size;
4404 }
4405
4406
4407 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4408 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4409 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4410 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4411 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4412 int os::Solaris::_mutex_scope = USYNC_THREAD;
4413
4414 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4415 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4416 int_fnP_cond_tP os::Solaris::_cond_signal;
4417 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4418 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4419 int_fnP_cond_tP os::Solaris::_cond_destroy;
4420 int os::Solaris::_cond_scope = USYNC_THREAD;
4421
4422 void os::Solaris::synchronization_init() {
4423 if (UseLWPSynchronization) {
4424 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4425 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4426 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4427 os::Solaris::set_mutex_init(lwp_mutex_init);
4428 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4429 os::Solaris::set_mutex_scope(USYNC_THREAD);
4430
4431 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4432 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4433 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4434 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4435 os::Solaris::set_cond_init(lwp_cond_init);
4436 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4437 os::Solaris::set_cond_scope(USYNC_THREAD);
4438 } else {
4439 os::Solaris::set_mutex_scope(USYNC_THREAD);
4440 os::Solaris::set_cond_scope(USYNC_THREAD);
4441
4442 if (UsePthreads) {
4443 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4444 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4445 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4446 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4447 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4448
4449 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4450 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4451 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4452 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4453 os::Solaris::set_cond_init(pthread_cond_default_init);
4454 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4455 } else {
4456 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4457 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4458 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4459 os::Solaris::set_mutex_init(::mutex_init);
4460 os::Solaris::set_mutex_destroy(::mutex_destroy);
4461
4462 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4463 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4464 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4465 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4466 os::Solaris::set_cond_init(::cond_init);
4467 os::Solaris::set_cond_destroy(::cond_destroy);
4468 }
4469 }
4470 }
4471
4472 bool os::Solaris::liblgrp_init() {
4473 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4474 if (handle != NULL) {
4475 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4476 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4477 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4478 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4479 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4480 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4481 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4482 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4483 dlsym(handle, "lgrp_cookie_stale")));
4484
4485 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4486 set_lgrp_cookie(c);
4487 return true;
4488 }
4489 return false;
4490 }
4491
4492 void os::Solaris::misc_sym_init() {
4493 address func;
4494
4495 // getisax
4496 func = resolve_symbol_lazy("getisax");
4497 if (func != NULL) {
4498 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4499 }
4500
4501 // meminfo
4502 func = resolve_symbol_lazy("meminfo");
4503 if (func != NULL) {
4504 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4505 }
4506 }
4507
4508 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4509 assert(_getisax != NULL, "_getisax not set");
4510 return _getisax(array, n);
4511 }
4512
4513 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4514 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4515 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4516
4517 void init_pset_getloadavg_ptr(void) {
4518 pset_getloadavg_ptr =
4519 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4520 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4521 warning("pset_getloadavg function not found");
4522 }
4523 }
4524
4525 int os::Solaris::_dev_zero_fd = -1;
4526
4527 // this is called _before_ the global arguments have been parsed
4528 void os::init(void) {
4529 _initial_pid = getpid();
4530
4531 max_hrtime = first_hrtime = gethrtime();
4532
4533 init_random(1234567);
4534
4535 page_size = sysconf(_SC_PAGESIZE);
4536 if (page_size == -1) {
4537 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4538 strerror(errno)));
4539 }
4540 init_page_sizes((size_t) page_size);
4541
4542 Solaris::initialize_system_info();
4543
4544 // Initialize misc. symbols as soon as possible, so we can use them
4545 // if we need them.
4546 Solaris::misc_sym_init();
4547
4548 int fd = ::open("/dev/zero", O_RDWR);
4549 if (fd < 0) {
4550 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
4551 } else {
4552 Solaris::set_dev_zero_fd(fd);
4553
4554 // Close on exec, child won't inherit.
4555 fcntl(fd, F_SETFD, FD_CLOEXEC);
4556 }
4557
4558 clock_tics_per_sec = CLK_TCK;
4559
4560 // check if dladdr1() exists; dladdr1 can provide more information than
4561 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4562 // and is available on linker patches for 5.7 and 5.8.
4563 // libdl.so must have been loaded, this call is just an entry lookup
4564 void * hdl = dlopen("libdl.so", RTLD_NOW);
4565 if (hdl) {
4566 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4567 }
4568
4569 // (Solaris only) this switches to calls that actually do locking.
4570 ThreadCritical::initialize();
4571
4572 main_thread = thr_self();
4573
4574 // Constant minimum stack size allowed. It must be at least
4575 // the minimum of what the OS supports (thr_min_stack()), and
4576 // enough to allow the thread to get to user bytecode execution.
4577 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4578 // If the pagesize of the VM is greater than 8K determine the appropriate
4579 // number of initial guard pages. The user can change this with the
4580 // command line arguments, if needed.
4581 if (vm_page_size() > 8*K) {
4582 StackYellowPages = 1;
4583 StackRedPages = 1;
4584 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4585 }
4586 }
4587
4588 // To install functions for atexit system call
4589 extern "C" {
4590 static void perfMemory_exit_helper() {
4591 perfMemory_exit();
4592 }
4593 }
4594
4595 // this is called _after_ the global arguments have been parsed
4596 jint os::init_2(void) {
4597 // try to enable extended file IO ASAP, see 6431278
4598 os::Solaris::try_enable_extended_io();
4599
4600 // Allocate a single page and mark it as readable for safepoint polling. Also
4601 // use this first mmap call to check support for MAP_ALIGN.
4602 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4603 page_size,
4604 MAP_PRIVATE | MAP_ALIGN,
4605 PROT_READ);
4606 if (polling_page == NULL) {
4607 has_map_align = false;
4608 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4609 PROT_READ);
4610 }
4611
4612 os::set_polling_page(polling_page);
4613
4614 #ifndef PRODUCT
4615 if (Verbose && PrintMiscellaneous) {
4616 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n",
4617 (intptr_t)polling_page);
4618 }
4619 #endif
4620
4621 if (!UseMembar) {
4622 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE);
4623 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page");
4624 os::set_memory_serialize_page(mem_serialize_page);
4625
4626 #ifndef PRODUCT
4627 if (Verbose && PrintMiscellaneous) {
4628 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n",
4629 (intptr_t)mem_serialize_page);
4630 }
4631 #endif
4632 }
4633
4634 // Check minimum allowable stack size for thread creation and to initialize
4635 // the java system classes, including StackOverflowError - depends on page
4636 // size. Add a page for compiler2 recursion in main thread.
4637 // Add in 2*BytesPerWord times page size to account for VM stack during
4638 // class initialization depending on 32 or 64 bit VM.
4639 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
4640 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
4641 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
4642
4643 size_t threadStackSizeInBytes = ThreadStackSize * K;
4644 if (threadStackSizeInBytes != 0 &&
4645 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
4646 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
4647 os::Solaris::min_stack_allowed/K);
4648 return JNI_ERR;
4649 }
4650
4651 // For 64kbps there will be a 64kb page size, which makes
4652 // the usable default stack size quite a bit less. Increase the
4653 // stack for 64kb (or any > than 8kb) pages, this increases
4654 // virtual memory fragmentation (since we're not creating the
4655 // stack on a power of 2 boundary. The real fix for this
4656 // should be to fix the guard page mechanism.
4657
4658 if (vm_page_size() > 8*K) {
4659 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
4660 ? threadStackSizeInBytes +
4661 ((StackYellowPages + StackRedPages) * vm_page_size())
4662 : 0;
4663 ThreadStackSize = threadStackSizeInBytes/K;
4664 }
4665
4666 // Make the stack size a multiple of the page size so that
4667 // the yellow/red zones can be guarded.
4668 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
4669 vm_page_size()));
4670
4671 Solaris::libthread_init();
4672
4673 if (UseNUMA) {
4674 if (!Solaris::liblgrp_init()) {
4675 UseNUMA = false;
4676 } else {
4677 size_t lgrp_limit = os::numa_get_groups_num();
4678 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
4679 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4680 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal);
4681 if (lgrp_num < 2) {
4682 // There's only one locality group, disable NUMA.
4683 UseNUMA = false;
4684 }
4685 }
4686 if (!UseNUMA && ForceNUMA) {
4687 UseNUMA = true;
4688 }
4689 }
4690
4691 Solaris::signal_sets_init();
4692 Solaris::init_signal_mem();
4693 Solaris::install_signal_handlers();
4694
4695 if (libjsigversion < JSIG_VERSION_1_4_1) {
4696 Maxlibjsigsigs = OLDMAXSIGNUM;
4697 }
4698
4699 // initialize synchronization primitives to use either thread or
4700 // lwp synchronization (controlled by UseLWPSynchronization)
4701 Solaris::synchronization_init();
4702
4703 if (MaxFDLimit) {
4704 // set the number of file descriptors to max. print out error
4705 // if getrlimit/setrlimit fails but continue regardless.
4706 struct rlimit nbr_files;
4707 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4708 if (status != 0) {
4709 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4710 perror("os::init_2 getrlimit failed");
4711 }
4712 } else {
4713 nbr_files.rlim_cur = nbr_files.rlim_max;
4714 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4715 if (status != 0) {
4716 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4717 perror("os::init_2 setrlimit failed");
4718 }
4719 }
4720 }
4721 }
4722
4723 // Calculate theoretical max. size of Threads to guard gainst
4724 // artifical out-of-memory situations, where all available address-
4725 // space has been reserved by thread stacks. Default stack size is 1Mb.
4726 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
4727 JavaThread::stack_size_at_create() : (1*K*K);
4728 assert(pre_thread_stack_size != 0, "Must have a stack");
4729 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
4730 // we should start doing Virtual Memory banging. Currently when the threads will
4731 // have used all but 200Mb of space.
4732 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
4733 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
4734
4735 // at-exit methods are called in the reverse order of their registration.
4736 // In Solaris 7 and earlier, atexit functions are called on return from
4737 // main or as a result of a call to exit(3C). There can be only 32 of
4738 // these functions registered and atexit() does not set errno. In Solaris
4739 // 8 and later, there is no limit to the number of functions registered
4740 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
4741 // functions are called upon dlclose(3DL) in addition to return from main
4742 // and exit(3C).
4743
4744 if (PerfAllowAtExitRegistration) {
4745 // only register atexit functions if PerfAllowAtExitRegistration is set.
4746 // atexit functions can be delayed until process exit time, which
4747 // can be problematic for embedded VM situations. Embedded VMs should
4748 // call DestroyJavaVM() to assure that VM resources are released.
4749
4750 // note: perfMemory_exit_helper atexit function may be removed in
4751 // the future if the appropriate cleanup code can be added to the
4752 // VM_Exit VMOperation's doit method.
4753 if (atexit(perfMemory_exit_helper) != 0) {
4754 warning("os::init2 atexit(perfMemory_exit_helper) failed");
4755 }
4756 }
4757
4758 // Init pset_loadavg function pointer
4759 init_pset_getloadavg_ptr();
4760
4761 return JNI_OK;
4762 }
4763
4764 void os::init_3(void) {
4765 return;
4766 }
4767
4768 // Mark the polling page as unreadable
4769 void os::make_polling_page_unreadable(void) {
4770 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) {
4771 fatal("Could not disable polling page");
4772 }
4773 }
4774
4775 // Mark the polling page as readable
4776 void os::make_polling_page_readable(void) {
4777 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) {
4778 fatal("Could not enable polling page");
4779 }
4780 }
4781
4782 // OS interface.
4783
4784 bool os::check_heap(bool force) { return true; }
4785
4786 // Is a (classpath) directory empty?
4787 bool os::dir_is_empty(const char* path) {
4788 DIR *dir = NULL;
4789 struct dirent *ptr;
4790
4791 dir = opendir(path);
4792 if (dir == NULL) return true;
4793
4794 // Scan the directory
4795 bool result = true;
4796 char buf[sizeof(struct dirent) + MAX_PATH];
4797 struct dirent *dbuf = (struct dirent *) buf;
4798 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
4799 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
4800 result = false;
4801 }
4802 }
4803 closedir(dir);
4804 return result;
4805 }
4806
4807 // This code originates from JDK's sysOpen and open64_w
4808 // from src/solaris/hpi/src/system_md.c
4809
4810 int os::open(const char *path, int oflag, int mode) {
4811 if (strlen(path) > MAX_PATH - 1) {
4812 errno = ENAMETOOLONG;
4813 return -1;
4814 }
4815 int fd;
4816
4817 fd = ::open64(path, oflag, mode);
4818 if (fd == -1) return -1;
4819
4820 // If the open succeeded, the file might still be a directory
4821 {
4822 struct stat64 buf64;
4823 int ret = ::fstat64(fd, &buf64);
4824 int st_mode = buf64.st_mode;
4825
4826 if (ret != -1) {
4827 if ((st_mode & S_IFMT) == S_IFDIR) {
4828 errno = EISDIR;
4829 ::close(fd);
4830 return -1;
4831 }
4832 } else {
4833 ::close(fd);
4834 return -1;
4835 }
4836 }
4837
4838 // 32-bit Solaris systems suffer from:
4839 //
4840 // - an historical default soft limit of 256 per-process file
4841 // descriptors that is too low for many Java programs.
4842 //
4843 // - a design flaw where file descriptors created using stdio
4844 // fopen must be less than 256, _even_ when the first limit above
4845 // has been raised. This can cause calls to fopen (but not calls to
4846 // open, for example) to fail mysteriously, perhaps in 3rd party
4847 // native code (although the JDK itself uses fopen). One can hardly
4848 // criticize them for using this most standard of all functions.
4849 //
4850 // We attempt to make everything work anyways by:
4851 //
4852 // - raising the soft limit on per-process file descriptors beyond
4853 // 256
4854 //
4855 // - As of Solaris 10u4, we can request that Solaris raise the 256
4856 // stdio fopen limit by calling function enable_extended_FILE_stdio.
4857 // This is done in init_2 and recorded in enabled_extended_FILE_stdio
4858 //
4859 // - If we are stuck on an old (pre 10u4) Solaris system, we can
4860 // workaround the bug by remapping non-stdio file descriptors below
4861 // 256 to ones beyond 256, which is done below.
4862 //
4863 // See:
4864 // 1085341: 32-bit stdio routines should support file descriptors >255
4865 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files
4866 // 6431278: Netbeans crash on 32 bit Solaris: need to call
4867 // enable_extended_FILE_stdio() in VM initialisation
4868 // Giri Mandalika's blog
4869 // http://technopark02.blogspot.com/2005_05_01_archive.html
4870 //
4871 #ifndef _LP64
4872 if ((!enabled_extended_FILE_stdio) && fd < 256) {
4873 int newfd = ::fcntl(fd, F_DUPFD, 256);
4874 if (newfd != -1) {
4875 ::close(fd);
4876 fd = newfd;
4877 }
4878 }
4879 #endif // 32-bit Solaris
4880
4881 // All file descriptors that are opened in the JVM and not
4882 // specifically destined for a subprocess should have the
4883 // close-on-exec flag set. If we don't set it, then careless 3rd
4884 // party native code might fork and exec without closing all
4885 // appropriate file descriptors (e.g. as we do in closeDescriptors in
4886 // UNIXProcess.c), and this in turn might:
4887 //
4888 // - cause end-of-file to fail to be detected on some file
4889 // descriptors, resulting in mysterious hangs, or
4890 //
4891 // - might cause an fopen in the subprocess to fail on a system
4892 // suffering from bug 1085341.
4893 //
4894 // (Yes, the default setting of the close-on-exec flag is a Unix
4895 // design flaw)
4896 //
4897 // See:
4898 // 1085341: 32-bit stdio routines should support file descriptors >255
4899 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed
4900 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
4901 //
4902 #ifdef FD_CLOEXEC
4903 {
4904 int flags = ::fcntl(fd, F_GETFD);
4905 if (flags != -1) {
4906 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
4907 }
4908 }
4909 #endif
4910
4911 return fd;
4912 }
4913
4914 // create binary file, rewriting existing file if required
4915 int os::create_binary_file(const char* path, bool rewrite_existing) {
4916 int oflags = O_WRONLY | O_CREAT;
4917 if (!rewrite_existing) {
4918 oflags |= O_EXCL;
4919 }
4920 return ::open64(path, oflags, S_IREAD | S_IWRITE);
4921 }
4922
4923 // return current position of file pointer
4924 jlong os::current_file_offset(int fd) {
4925 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
4926 }
4927
4928 // move file pointer to the specified offset
4929 jlong os::seek_to_file_offset(int fd, jlong offset) {
4930 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
4931 }
4932
4933 jlong os::lseek(int fd, jlong offset, int whence) {
4934 return (jlong) ::lseek64(fd, offset, whence);
4935 }
4936
4937 char * os::native_path(char *path) {
4938 return path;
4939 }
4940
4941 int os::ftruncate(int fd, jlong length) {
4942 return ::ftruncate64(fd, length);
4943 }
4944
4945 int os::fsync(int fd) {
4946 RESTARTABLE_RETURN_INT(::fsync(fd));
4947 }
4948
4949 int os::available(int fd, jlong *bytes) {
4950 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
4951 "Assumed _thread_in_native");
4952 jlong cur, end;
4953 int mode;
4954 struct stat64 buf64;
4955
4956 if (::fstat64(fd, &buf64) >= 0) {
4957 mode = buf64.st_mode;
4958 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
4959 int n,ioctl_return;
4960
4961 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return);
4962 if (ioctl_return>= 0) {
4963 *bytes = n;
4964 return 1;
4965 }
4966 }
4967 }
4968 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
4969 return 0;
4970 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
4971 return 0;
4972 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
4973 return 0;
4974 }
4975 *bytes = end - cur;
4976 return 1;
4977 }
4978
4979 // Map a block of memory.
4980 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
4981 char *addr, size_t bytes, bool read_only,
4982 bool allow_exec) {
4983 int prot;
4984 int flags;
4985
4986 if (read_only) {
4987 prot = PROT_READ;
4988 flags = MAP_SHARED;
4989 } else {
4990 prot = PROT_READ | PROT_WRITE;
4991 flags = MAP_PRIVATE;
4992 }
4993
4994 if (allow_exec) {
4995 prot |= PROT_EXEC;
4996 }
4997
4998 if (addr != NULL) {
4999 flags |= MAP_FIXED;
5000 }
5001
5002 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5003 fd, file_offset);
5004 if (mapped_address == MAP_FAILED) {
5005 return NULL;
5006 }
5007 return mapped_address;
5008 }
5009
5010
5011 // Remap a block of memory.
5012 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5013 char *addr, size_t bytes, bool read_only,
5014 bool allow_exec) {
5015 // same as map_memory() on this OS
5016 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5017 allow_exec);
5018 }
5019
5020
5021 // Unmap a block of memory.
5022 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5023 return munmap(addr, bytes) == 0;
5024 }
5025
5026 void os::pause() {
5027 char filename[MAX_PATH];
5028 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5029 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5030 } else {
5031 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5032 }
5033
5034 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5035 if (fd != -1) {
5036 struct stat buf;
5037 ::close(fd);
5038 while (::stat(filename, &buf) == 0) {
5039 (void)::poll(NULL, 0, 100);
5040 }
5041 } else {
5042 jio_fprintf(stderr,
5043 "Could not open pause file '%s', continuing immediately.\n", filename);
5044 }
5045 }
5046
5047 #ifndef PRODUCT
5048 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5049 // Turn this on if you need to trace synch operations.
5050 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5051 // and call record_synch_enable and record_synch_disable
5052 // around the computation of interest.
5053
5054 void record_synch(char* name, bool returning); // defined below
5055
5056 class RecordSynch {
5057 char* _name;
5058 public:
5059 RecordSynch(char* name) :_name(name) { record_synch(_name, false); }
5060 ~RecordSynch() { record_synch(_name, true); }
5061 };
5062
5063 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5064 extern "C" ret name params { \
5065 typedef ret name##_t params; \
5066 static name##_t* implem = NULL; \
5067 static int callcount = 0; \
5068 if (implem == NULL) { \
5069 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5070 if (implem == NULL) fatal(dlerror()); \
5071 } \
5072 ++callcount; \
5073 RecordSynch _rs(#name); \
5074 inner; \
5075 return implem args; \
5076 }
5077 // in dbx, examine callcounts this way:
5078 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5079
5080 #define CHECK_POINTER_OK(p) \
5081 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5082 #define CHECK_MU \
5083 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5084 #define CHECK_CV \
5085 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5086 #define CHECK_P(p) \
5087 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5088
5089 #define CHECK_MUTEX(mutex_op) \
5090 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5091
5092 CHECK_MUTEX( mutex_lock)
5093 CHECK_MUTEX( _mutex_lock)
5094 CHECK_MUTEX( mutex_unlock)
5095 CHECK_MUTEX(_mutex_unlock)
5096 CHECK_MUTEX( mutex_trylock)
5097 CHECK_MUTEX(_mutex_trylock)
5098
5099 #define CHECK_COND(cond_op) \
5100 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV);
5101
5102 CHECK_COND( cond_wait);
5103 CHECK_COND(_cond_wait);
5104 CHECK_COND(_cond_wait_cancel);
5105
5106 #define CHECK_COND2(cond_op) \
5107 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV);
5108
5109 CHECK_COND2( cond_timedwait);
5110 CHECK_COND2(_cond_timedwait);
5111 CHECK_COND2(_cond_timedwait_cancel);
5112
5113 // do the _lwp_* versions too
5114 #define mutex_t lwp_mutex_t
5115 #define cond_t lwp_cond_t
5116 CHECK_MUTEX( _lwp_mutex_lock)
5117 CHECK_MUTEX( _lwp_mutex_unlock)
5118 CHECK_MUTEX( _lwp_mutex_trylock)
5119 CHECK_MUTEX( __lwp_mutex_lock)
5120 CHECK_MUTEX( __lwp_mutex_unlock)
5121 CHECK_MUTEX( __lwp_mutex_trylock)
5122 CHECK_MUTEX(___lwp_mutex_lock)
5123 CHECK_MUTEX(___lwp_mutex_unlock)
5124
5125 CHECK_COND( _lwp_cond_wait);
5126 CHECK_COND( __lwp_cond_wait);
5127 CHECK_COND(___lwp_cond_wait);
5128
5129 CHECK_COND2( _lwp_cond_timedwait);
5130 CHECK_COND2( __lwp_cond_timedwait);
5131 #undef mutex_t
5132 #undef cond_t
5133
5134 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5135 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5136 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5137 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5138 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5139 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5140 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5141 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5142
5143
5144 // recording machinery:
5145
5146 enum { RECORD_SYNCH_LIMIT = 200 };
5147 char* record_synch_name[RECORD_SYNCH_LIMIT];
5148 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5149 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5150 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5151 int record_synch_count = 0;
5152 bool record_synch_enabled = false;
5153
5154 // in dbx, examine recorded data this way:
5155 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5156
5157 void record_synch(char* name, bool returning) {
5158 if (record_synch_enabled) {
5159 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5160 record_synch_name[record_synch_count] = name;
5161 record_synch_returning[record_synch_count] = returning;
5162 record_synch_thread[record_synch_count] = thr_self();
5163 record_synch_arg0ptr[record_synch_count] = &name;
5164 record_synch_count++;
5165 }
5166 // put more checking code here:
5167 // ...
5168 }
5169 }
5170
5171 void record_synch_enable() {
5172 // start collecting trace data, if not already doing so
5173 if (!record_synch_enabled) record_synch_count = 0;
5174 record_synch_enabled = true;
5175 }
5176
5177 void record_synch_disable() {
5178 // stop collecting trace data
5179 record_synch_enabled = false;
5180 }
5181
5182 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5183 #endif // PRODUCT
5184
5185 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5186 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5187 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5188
5189
5190 // JVMTI & JVM monitoring and management support
5191 // The thread_cpu_time() and current_thread_cpu_time() are only
5192 // supported if is_thread_cpu_time_supported() returns true.
5193 // They are not supported on Solaris T1.
5194
5195 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5196 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5197 // of a thread.
5198 //
5199 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5200 // returns the fast estimate available on the platform.
5201
5202 // hrtime_t gethrvtime() return value includes
5203 // user time but does not include system time
5204 jlong os::current_thread_cpu_time() {
5205 return (jlong) gethrvtime();
5206 }
5207
5208 jlong os::thread_cpu_time(Thread *thread) {
5209 // return user level CPU time only to be consistent with
5210 // what current_thread_cpu_time returns.
5211 // thread_cpu_time_info() must be changed if this changes
5212 return os::thread_cpu_time(thread, false /* user time only */);
5213 }
5214
5215 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5216 if (user_sys_cpu_time) {
5217 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5218 } else {
5219 return os::current_thread_cpu_time();
5220 }
5221 }
5222
5223 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5224 char proc_name[64];
5225 int count;
5226 prusage_t prusage;
5227 jlong lwp_time;
5228 int fd;
5229
5230 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5231 getpid(),
5232 thread->osthread()->lwp_id());
5233 fd = ::open(proc_name, O_RDONLY);
5234 if (fd == -1) return -1;
5235
5236 do {
5237 count = ::pread(fd,
5238 (void *)&prusage.pr_utime,
5239 thr_time_size,
5240 thr_time_off);
5241 } while (count < 0 && errno == EINTR);
5242 ::close(fd);
5243 if (count < 0) return -1;
5244
5245 if (user_sys_cpu_time) {
5246 // user + system CPU time
5247 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5248 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5249 (jlong)prusage.pr_stime.tv_nsec +
5250 (jlong)prusage.pr_utime.tv_nsec;
5251 } else {
5252 // user level CPU time only
5253 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5254 (jlong)prusage.pr_utime.tv_nsec;
5255 }
5256
5257 return (lwp_time);
5258 }
5259
5260 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5261 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5262 info_ptr->may_skip_backward = false; // elapsed time not wall time
5263 info_ptr->may_skip_forward = false; // elapsed time not wall time
5264 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5265 }
5266
5267 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5268 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5269 info_ptr->may_skip_backward = false; // elapsed time not wall time
5270 info_ptr->may_skip_forward = false; // elapsed time not wall time
5271 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5272 }
5273
5274 bool os::is_thread_cpu_time_supported() {
5275 return true;
5276 }
5277
5278 // System loadavg support. Returns -1 if load average cannot be obtained.
5279 // Return the load average for our processor set if the primitive exists
5280 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5281 int os::loadavg(double loadavg[], int nelem) {
5282 if (pset_getloadavg_ptr != NULL) {
5283 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5284 } else {
5285 return ::getloadavg(loadavg, nelem);
5286 }
5287 }
5288
5289 //---------------------------------------------------------------------------------
5290
5291 bool os::find(address addr, outputStream* st) {
5292 Dl_info dlinfo;
5293 memset(&dlinfo, 0, sizeof(dlinfo));
5294 if (dladdr(addr, &dlinfo) != 0) {
5295 st->print(PTR_FORMAT ": ", addr);
5296 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
5297 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5298 } else if (dlinfo.dli_fbase != NULL) {
5299 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5300 } else {
5301 st->print("<absolute address>");
5302 }
5303 if (dlinfo.dli_fname != NULL) {
5304 st->print(" in %s", dlinfo.dli_fname);
5305 }
5306 if (dlinfo.dli_fbase != NULL) {
5307 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
5308 }
5309 st->cr();
5310
5311 if (Verbose) {
5312 // decode some bytes around the PC
5313 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size());
5314 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size());
5315 address lowest = (address) dlinfo.dli_sname;
5316 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5317 if (begin < lowest) begin = lowest;
5318 Dl_info dlinfo2;
5319 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
5320 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) {
5321 end = (address) dlinfo2.dli_saddr;
5322 }
5323 Disassembler::decode(begin, end, st);
5324 }
5325 return true;
5326 }
5327 return false;
5328 }
5329
5330 // Following function has been added to support HotSparc's libjvm.so running
5331 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5332 // src/solaris/hpi/native_threads in the EVM codebase.
5333 //
5334 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5335 // libraries and should thus be removed. We will leave it behind for a while
5336 // until we no longer want to able to run on top of 1.3.0 Solaris production
5337 // JDK. See 4341971.
5338
5339 #define STACK_SLACK 0x800
5340
5341 extern "C" {
5342 intptr_t sysThreadAvailableStackWithSlack() {
5343 stack_t st;
5344 intptr_t retval, stack_top;
5345 retval = thr_stksegment(&st);
5346 assert(retval == 0, "incorrect return value from thr_stksegment");
5347 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5348 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5349 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5350 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5351 }
5352 }
5353
5354 // ObjectMonitor park-unpark infrastructure ...
5355 //
5356 // We implement Solaris and Linux PlatformEvents with the
5357 // obvious condvar-mutex-flag triple.
5358 // Another alternative that works quite well is pipes:
5359 // Each PlatformEvent consists of a pipe-pair.
5360 // The thread associated with the PlatformEvent
5361 // calls park(), which reads from the input end of the pipe.
5362 // Unpark() writes into the other end of the pipe.
5363 // The write-side of the pipe must be set NDELAY.
5364 // Unfortunately pipes consume a large # of handles.
5365 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5366 // Using pipes for the 1st few threads might be workable, however.
5367 //
5368 // park() is permitted to return spuriously.
5369 // Callers of park() should wrap the call to park() in
5370 // an appropriate loop. A litmus test for the correct
5371 // usage of park is the following: if park() were modified
5372 // to immediately return 0 your code should still work,
5373 // albeit degenerating to a spin loop.
5374 //
5375 // An interesting optimization for park() is to use a trylock()
5376 // to attempt to acquire the mutex. If the trylock() fails
5377 // then we know that a concurrent unpark() operation is in-progress.
5378 // in that case the park() code could simply set _count to 0
5379 // and return immediately. The subsequent park() operation *might*
5380 // return immediately. That's harmless as the caller of park() is
5381 // expected to loop. By using trylock() we will have avoided a
5382 // avoided a context switch caused by contention on the per-thread mutex.
5383 //
5384 // TODO-FIXME:
5385 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5386 // objectmonitor implementation.
5387 // 2. Collapse the JSR166 parker event, and the
5388 // objectmonitor ParkEvent into a single "Event" construct.
5389 // 3. In park() and unpark() add:
5390 // assert (Thread::current() == AssociatedWith).
5391 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5392 // 1-out-of-N park() operations will return immediately.
5393 //
5394 // _Event transitions in park()
5395 // -1 => -1 : illegal
5396 // 1 => 0 : pass - return immediately
5397 // 0 => -1 : block
5398 //
5399 // _Event serves as a restricted-range semaphore.
5400 //
5401 // Another possible encoding of _Event would be with
5402 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5403 //
5404 // TODO-FIXME: add DTRACE probes for:
5405 // 1. Tx parks
5406 // 2. Ty unparks Tx
5407 // 3. Tx resumes from park
5408
5409
5410 // value determined through experimentation
5411 #define ROUNDINGFIX 11
5412
5413 // utility to compute the abstime argument to timedwait.
5414 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5415
5416 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5417 // millis is the relative timeout time
5418 // abstime will be the absolute timeout time
5419 if (millis < 0) millis = 0;
5420 struct timeval now;
5421 int status = gettimeofday(&now, NULL);
5422 assert(status == 0, "gettimeofday");
5423 jlong seconds = millis / 1000;
5424 jlong max_wait_period;
5425
5426 if (UseLWPSynchronization) {
5427 // forward port of fix for 4275818 (not sleeping long enough)
5428 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5429 // _lwp_cond_timedwait() used a round_down algorithm rather
5430 // than a round_up. For millis less than our roundfactor
5431 // it rounded down to 0 which doesn't meet the spec.
5432 // For millis > roundfactor we may return a bit sooner, but
5433 // since we can not accurately identify the patch level and
5434 // this has already been fixed in Solaris 9 and 8 we will
5435 // leave it alone rather than always rounding down.
5436
5437 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5438 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5439 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5440 max_wait_period = 21000000;
5441 } else {
5442 max_wait_period = 50000000;
5443 }
5444 millis %= 1000;
5445 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5446 seconds = max_wait_period;
5447 }
5448 abstime->tv_sec = now.tv_sec + seconds;
5449 long usec = now.tv_usec + millis * 1000;
5450 if (usec >= 1000000) {
5451 abstime->tv_sec += 1;
5452 usec -= 1000000;
5453 }
5454 abstime->tv_nsec = usec * 1000;
5455 return abstime;
5456 }
5457
5458 void os::PlatformEvent::park() { // AKA: down()
5459 // Invariant: Only the thread associated with the Event/PlatformEvent
5460 // may call park().
5461 assert(_nParked == 0, "invariant");
5462
5463 int v;
5464 for (;;) {
5465 v = _Event;
5466 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5467 }
5468 guarantee(v >= 0, "invariant");
5469 if (v == 0) {
5470 // Do this the hard way by blocking ...
5471 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5472 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5473 // Only for SPARC >= V8PlusA
5474 #if defined(__sparc) && defined(COMPILER2)
5475 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5476 #endif
5477 int status = os::Solaris::mutex_lock(_mutex);
5478 assert_status(status == 0, status, "mutex_lock");
5479 guarantee(_nParked == 0, "invariant");
5480 ++_nParked;
5481 while (_Event < 0) {
5482 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5483 // Treat this the same as if the wait was interrupted
5484 // With usr/lib/lwp going to kernel, always handle ETIME
5485 status = os::Solaris::cond_wait(_cond, _mutex);
5486 if (status == ETIME) status = EINTR;
5487 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5488 }
5489 --_nParked;
5490 _Event = 0;
5491 status = os::Solaris::mutex_unlock(_mutex);
5492 assert_status(status == 0, status, "mutex_unlock");
5493 // Paranoia to ensure our locked and lock-free paths interact
5494 // correctly with each other.
5495 OrderAccess::fence();
5496 }
5497 }
5498
5499 int os::PlatformEvent::park(jlong millis) {
5500 guarantee(_nParked == 0, "invariant");
5501 int v;
5502 for (;;) {
5503 v = _Event;
5504 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5505 }
5506 guarantee(v >= 0, "invariant");
5507 if (v != 0) return OS_OK;
5508
5509 int ret = OS_TIMEOUT;
5510 timestruc_t abst;
5511 compute_abstime(&abst, millis);
5512
5513 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5514 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5515 // Only for SPARC >= V8PlusA
5516 #if defined(__sparc) && defined(COMPILER2)
5517 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5518 #endif
5519 int status = os::Solaris::mutex_lock(_mutex);
5520 assert_status(status == 0, status, "mutex_lock");
5521 guarantee(_nParked == 0, "invariant");
5522 ++_nParked;
5523 while (_Event < 0) {
5524 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5525 assert_status(status == 0 || status == EINTR ||
5526 status == ETIME || status == ETIMEDOUT,
5527 status, "cond_timedwait");
5528 if (!FilterSpuriousWakeups) break; // previous semantics
5529 if (status == ETIME || status == ETIMEDOUT) break;
5530 // We consume and ignore EINTR and spurious wakeups.
5531 }
5532 --_nParked;
5533 if (_Event >= 0) ret = OS_OK;
5534 _Event = 0;
5535 status = os::Solaris::mutex_unlock(_mutex);
5536 assert_status(status == 0, status, "mutex_unlock");
5537 // Paranoia to ensure our locked and lock-free paths interact
5538 // correctly with each other.
5539 OrderAccess::fence();
5540 return ret;
5541 }
5542
5543 void os::PlatformEvent::unpark() {
5544 // Transitions for _Event:
5545 // 0 :=> 1
5546 // 1 :=> 1
5547 // -1 :=> either 0 or 1; must signal target thread
5548 // That is, we can safely transition _Event from -1 to either
5549 // 0 or 1.
5550 // See also: "Semaphores in Plan 9" by Mullender & Cox
5551 //
5552 // Note: Forcing a transition from "-1" to "1" on an unpark() means
5553 // that it will take two back-to-back park() calls for the owning
5554 // thread to block. This has the benefit of forcing a spurious return
5555 // from the first park() call after an unpark() call which will help
5556 // shake out uses of park() and unpark() without condition variables.
5557
5558 if (Atomic::xchg(1, &_Event) >= 0) return;
5559
5560 // If the thread associated with the event was parked, wake it.
5561 // Wait for the thread assoc with the PlatformEvent to vacate.
5562 int status = os::Solaris::mutex_lock(_mutex);
5563 assert_status(status == 0, status, "mutex_lock");
5564 int AnyWaiters = _nParked;
5565 status = os::Solaris::mutex_unlock(_mutex);
5566 assert_status(status == 0, status, "mutex_unlock");
5567 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
5568 if (AnyWaiters != 0) {
5569 // We intentional signal *after* dropping the lock
5570 // to avoid a common class of futile wakeups.
5571 status = os::Solaris::cond_signal(_cond);
5572 assert_status(status == 0, status, "cond_signal");
5573 }
5574 }
5575
5576 // JSR166
5577 // -------------------------------------------------------
5578
5579 // The solaris and linux implementations of park/unpark are fairly
5580 // conservative for now, but can be improved. They currently use a
5581 // mutex/condvar pair, plus _counter.
5582 // Park decrements _counter if > 0, else does a condvar wait. Unpark
5583 // sets count to 1 and signals condvar. Only one thread ever waits
5584 // on the condvar. Contention seen when trying to park implies that someone
5585 // is unparking you, so don't wait. And spurious returns are fine, so there
5586 // is no need to track notifications.
5587
5588 #define MAX_SECS 100000000
5589
5590 // This code is common to linux and solaris and will be moved to a
5591 // common place in dolphin.
5592 //
5593 // The passed in time value is either a relative time in nanoseconds
5594 // or an absolute time in milliseconds. Either way it has to be unpacked
5595 // into suitable seconds and nanoseconds components and stored in the
5596 // given timespec structure.
5597 // Given time is a 64-bit value and the time_t used in the timespec is only
5598 // a signed-32-bit value (except on 64-bit Linux) we have to watch for
5599 // overflow if times way in the future are given. Further on Solaris versions
5600 // prior to 10 there is a restriction (see cond_timedwait) that the specified
5601 // number of seconds, in abstime, is less than current_time + 100,000,000.
5602 // As it will be 28 years before "now + 100000000" will overflow we can
5603 // ignore overflow and just impose a hard-limit on seconds using the value
5604 // of "now + 100,000,000". This places a limit on the timeout of about 3.17
5605 // years from "now".
5606 //
5607 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5608 assert(time > 0, "convertTime");
5609
5610 struct timeval now;
5611 int status = gettimeofday(&now, NULL);
5612 assert(status == 0, "gettimeofday");
5613
5614 time_t max_secs = now.tv_sec + MAX_SECS;
5615
5616 if (isAbsolute) {
5617 jlong secs = time / 1000;
5618 if (secs > max_secs) {
5619 absTime->tv_sec = max_secs;
5620 } else {
5621 absTime->tv_sec = secs;
5622 }
5623 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5624 } else {
5625 jlong secs = time / NANOSECS_PER_SEC;
5626 if (secs >= MAX_SECS) {
5627 absTime->tv_sec = max_secs;
5628 absTime->tv_nsec = 0;
5629 } else {
5630 absTime->tv_sec = now.tv_sec + secs;
5631 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5632 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5633 absTime->tv_nsec -= NANOSECS_PER_SEC;
5634 ++absTime->tv_sec; // note: this must be <= max_secs
5635 }
5636 }
5637 }
5638 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5639 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5640 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5641 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5642 }
5643
5644 void Parker::park(bool isAbsolute, jlong time) {
5645 // Ideally we'd do something useful while spinning, such
5646 // as calling unpackTime().
5647
5648 // Optional fast-path check:
5649 // Return immediately if a permit is available.
5650 // We depend on Atomic::xchg() having full barrier semantics
5651 // since we are doing a lock-free update to _counter.
5652 if (Atomic::xchg(0, &_counter) > 0) return;
5653
5654 // Optional fast-exit: Check interrupt before trying to wait
5655 Thread* thread = Thread::current();
5656 assert(thread->is_Java_thread(), "Must be JavaThread");
5657 JavaThread *jt = (JavaThread *)thread;
5658 if (Thread::is_interrupted(thread, false)) {
5659 return;
5660 }
5661
5662 // First, demultiplex/decode time arguments
5663 timespec absTime;
5664 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all
5665 return;
5666 }
5667 if (time > 0) {
5668 // Warning: this code might be exposed to the old Solaris time
5669 // round-down bugs. Grep "roundingFix" for details.
5670 unpackTime(&absTime, isAbsolute, time);
5671 }
5672
5673 // Enter safepoint region
5674 // Beware of deadlocks such as 6317397.
5675 // The per-thread Parker:: _mutex is a classic leaf-lock.
5676 // In particular a thread must never block on the Threads_lock while
5677 // holding the Parker:: mutex. If safepoints are pending both the
5678 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
5679 ThreadBlockInVM tbivm(jt);
5680
5681 // Don't wait if cannot get lock since interference arises from
5682 // unblocking. Also. check interrupt before trying wait
5683 if (Thread::is_interrupted(thread, false) ||
5684 os::Solaris::mutex_trylock(_mutex) != 0) {
5685 return;
5686 }
5687
5688 int status;
5689
5690 if (_counter > 0) { // no wait needed
5691 _counter = 0;
5692 status = os::Solaris::mutex_unlock(_mutex);
5693 assert(status == 0, "invariant");
5694 // Paranoia to ensure our locked and lock-free paths interact
5695 // correctly with each other and Java-level accesses.
5696 OrderAccess::fence();
5697 return;
5698 }
5699
5700 #ifdef ASSERT
5701 // Don't catch signals while blocked; let the running threads have the signals.
5702 // (This allows a debugger to break into the running thread.)
5703 sigset_t oldsigs;
5704 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
5705 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
5706 #endif
5707
5708 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
5709 jt->set_suspend_equivalent();
5710 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
5711
5712 // Do this the hard way by blocking ...
5713 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5714 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5715 // Only for SPARC >= V8PlusA
5716 #if defined(__sparc) && defined(COMPILER2)
5717 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5718 #endif
5719
5720 if (time == 0) {
5721 status = os::Solaris::cond_wait(_cond, _mutex);
5722 } else {
5723 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
5724 }
5725 // Note that an untimed cond_wait() can sometimes return ETIME on older
5726 // versions of the Solaris.
5727 assert_status(status == 0 || status == EINTR ||
5728 status == ETIME || status == ETIMEDOUT,
5729 status, "cond_timedwait");
5730
5731 #ifdef ASSERT
5732 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
5733 #endif
5734 _counter = 0;
5735 status = os::Solaris::mutex_unlock(_mutex);
5736 assert_status(status == 0, status, "mutex_unlock");
5737 // Paranoia to ensure our locked and lock-free paths interact
5738 // correctly with each other and Java-level accesses.
5739 OrderAccess::fence();
5740
5741 // If externally suspended while waiting, re-suspend
5742 if (jt->handle_special_suspend_equivalent_condition()) {
5743 jt->java_suspend_self();
5744 }
5745 }
5746
5747 void Parker::unpark() {
5748 int status = os::Solaris::mutex_lock(_mutex);
5749 assert(status == 0, "invariant");
5750 const int s = _counter;
5751 _counter = 1;
5752 status = os::Solaris::mutex_unlock(_mutex);
5753 assert(status == 0, "invariant");
5754
5755 if (s < 1) {
5756 status = os::Solaris::cond_signal(_cond);
5757 assert(status == 0, "invariant");
5758 }
5759 }
5760
5761 extern char** environ;
5762
5763 // Run the specified command in a separate process. Return its exit value,
5764 // or -1 on failure (e.g. can't fork a new process).
5765 // Unlike system(), this function can be called from signal handler. It
5766 // doesn't block SIGINT et al.
5767 int os::fork_and_exec(char* cmd) {
5768 char * argv[4];
5769 argv[0] = (char *)"sh";
5770 argv[1] = (char *)"-c";
5771 argv[2] = cmd;
5772 argv[3] = NULL;
5773
5774 // fork is async-safe, fork1 is not so can't use in signal handler
5775 pid_t pid;
5776 Thread* t = ThreadLocalStorage::get_thread_slow();
5777 if (t != NULL && t->is_inside_signal_handler()) {
5778 pid = fork();
5779 } else {
5780 pid = fork1();
5781 }
5782
5783 if (pid < 0) {
5784 // fork failed
5785 warning("fork failed: %s", strerror(errno));
5786 return -1;
5787
5788 } else if (pid == 0) {
5789 // child process
5790
5791 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
5792 execve("/usr/bin/sh", argv, environ);
5793
5794 // execve failed
5795 _exit(-1);
5796
5797 } else {
5798 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5799 // care about the actual exit code, for now.
5800
5801 int status;
5802
5803 // Wait for the child process to exit. This returns immediately if
5804 // the child has already exited. */
5805 while (waitpid(pid, &status, 0) < 0) {
5806 switch (errno) {
5807 case ECHILD: return 0;
5808 case EINTR: break;
5809 default: return -1;
5810 }
5811 }
5812
5813 if (WIFEXITED(status)) {
5814 // The child exited normally; get its exit code.
5815 return WEXITSTATUS(status);
5816 } else if (WIFSIGNALED(status)) {
5817 // The child exited because of a signal
5818 // The best value to return is 0x80 + signal number,
5819 // because that is what all Unix shells do, and because
5820 // it allows callers to distinguish between process exit and
5821 // process death by signal.
5822 return 0x80 + WTERMSIG(status);
5823 } else {
5824 // Unknown exit code; pass it through
5825 return status;
5826 }
5827 }
5828 }
5829
5830 // is_headless_jre()
5831 //
5832 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
5833 // in order to report if we are running in a headless jre
5834 //
5835 // Since JDK8 xawt/libmawt.so was moved into the same directory
5836 // as libawt.so, and renamed libawt_xawt.so
5837 //
5838 bool os::is_headless_jre() {
5839 struct stat statbuf;
5840 char buf[MAXPATHLEN];
5841 char libmawtpath[MAXPATHLEN];
5842 const char *xawtstr = "/xawt/libmawt.so";
5843 const char *new_xawtstr = "/libawt_xawt.so";
5844 char *p;
5845
5846 // Get path to libjvm.so
5847 os::jvm_path(buf, sizeof(buf));
5848
5849 // Get rid of libjvm.so
5850 p = strrchr(buf, '/');
5851 if (p == NULL) {
5852 return false;
5853 } else {
5854 *p = '\0';
5855 }
5856
5857 // Get rid of client or server
5858 p = strrchr(buf, '/');
5859 if (p == NULL) {
5860 return false;
5861 } else {
5862 *p = '\0';
5863 }
5864
5865 // check xawt/libmawt.so
5866 strcpy(libmawtpath, buf);
5867 strcat(libmawtpath, xawtstr);
5868 if (::stat(libmawtpath, &statbuf) == 0) return false;
5869
5870 // check libawt_xawt.so
5871 strcpy(libmawtpath, buf);
5872 strcat(libmawtpath, new_xawtstr);
5873 if (::stat(libmawtpath, &statbuf) == 0) return false;
5874
5875 return true;
5876 }
5877
5878 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
5879 size_t res;
5880 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5881 "Assumed _thread_in_native");
5882 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
5883 return res;
5884 }
5885
5886 int os::close(int fd) {
5887 return ::close(fd);
5888 }
5889
5890 int os::socket_close(int fd) {
5891 return ::close(fd);
5892 }
5893
5894 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
5895 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5896 "Assumed _thread_in_native");
5897 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags));
5898 }
5899
5900 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
5901 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5902 "Assumed _thread_in_native");
5903 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5904 }
5905
5906 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
5907 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5908 }
5909
5910 // As both poll and select can be interrupted by signals, we have to be
5911 // prepared to restart the system call after updating the timeout, unless
5912 // a poll() is done with timeout == -1, in which case we repeat with this
5913 // "wait forever" value.
5914
5915 int os::timeout(int fd, long timeout) {
5916 int res;
5917 struct timeval t;
5918 julong prevtime, newtime;
5919 static const char* aNull = 0;
5920 struct pollfd pfd;
5921 pfd.fd = fd;
5922 pfd.events = POLLIN;
5923
5924 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5925 "Assumed _thread_in_native");
5926
5927 gettimeofday(&t, &aNull);
5928 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
5929
5930 for (;;) {
5931 res = ::poll(&pfd, 1, timeout);
5932 if (res == OS_ERR && errno == EINTR) {
5933 if (timeout != -1) {
5934 gettimeofday(&t, &aNull);
5935 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000;
5936 timeout -= newtime - prevtime;
5937 if (timeout <= 0) {
5938 return OS_OK;
5939 }
5940 prevtime = newtime;
5941 }
5942 } else return res;
5943 }
5944 }
5945
5946 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
5947 int _result;
5948 _result = ::connect(fd, him, len);
5949
5950 // On Solaris, when a connect() call is interrupted, the connection
5951 // can be established asynchronously (see 6343810). Subsequent calls
5952 // to connect() must check the errno value which has the semantic
5953 // described below (copied from the connect() man page). Handling
5954 // of asynchronously established connections is required for both
5955 // blocking and non-blocking sockets.
5956 // EINTR The connection attempt was interrupted
5957 // before any data arrived by the delivery of
5958 // a signal. The connection, however, will be
5959 // established asynchronously.
5960 //
5961 // EINPROGRESS The socket is non-blocking, and the connec-
5962 // tion cannot be completed immediately.
5963 //
5964 // EALREADY The socket is non-blocking, and a previous
5965 // connection attempt has not yet been com-
5966 // pleted.
5967 //
5968 // EISCONN The socket is already connected.
5969 if (_result == OS_ERR && errno == EINTR) {
5970 // restarting a connect() changes its errno semantics
5971 RESTARTABLE(::connect(fd, him, len), _result);
5972 // undo these changes
5973 if (_result == OS_ERR) {
5974 if (errno == EALREADY) {
5975 errno = EINPROGRESS; // fall through
5976 } else if (errno == EISCONN) {
5977 errno = 0;
5978 return OS_OK;
5979 }
5980 }
5981 }
5982 return _result;
5983 }
5984
5985 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
5986 if (fd < 0) {
5987 return OS_ERR;
5988 }
5989 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5990 "Assumed _thread_in_native");
5991 RESTARTABLE_RETURN_INT((int)::accept(fd, him, len));
5992 }
5993
5994 int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
5995 sockaddr* from, socklen_t* fromlen) {
5996 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5997 "Assumed _thread_in_native");
5998 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen));
5999 }
6000
6001 int os::sendto(int fd, char* buf, size_t len, uint flags,
6002 struct sockaddr* to, socklen_t tolen) {
6003 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
6004 "Assumed _thread_in_native");
6005 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen));
6006 }
6007
6008 int os::socket_available(int fd, jint *pbytes) {
6009 if (fd < 0) {
6010 return OS_OK;
6011 }
6012 int ret;
6013 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
6014 // note: ioctl can return 0 when successful, JVM_SocketAvailable
6015 // is expected to return 0 on failure and 1 on success to the jdk.
6016 return (ret == OS_ERR) ? 0 : 1;
6017 }
6018
6019 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
6020 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
6021 "Assumed _thread_in_native");
6022 return ::bind(fd, him, len);
6023 }
6024
6025 // Get the default path to the core file
6026 // Returns the length of the string
6027 int os::get_core_path(char* buffer, size_t bufferSize) {
6028 const char* p = get_current_directory(buffer, bufferSize);
6029
6030 if (p == NULL) {
6031 assert(p != NULL, "failed to get current directory");
6032 return 0;
6033 }
6034
6035 return strlen(buffer);
6036 }
6037
6038 #ifndef PRODUCT
6039 void TestReserveMemorySpecial_test() {
6040 // No tests available for this platform
6041 }
6042 #endif