1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // no precompiled headers
26 #include "classfile/classLoader.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/icBuffer.hpp"
30 #include "code/vtableStubs.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvm_solaris.h"
35 #include "memory/allocation.inline.hpp"
36 #include "memory/filemap.hpp"
37 #include "mutex_solaris.inline.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "os_share_solaris.hpp"
40 #include "os_solaris.inline.hpp"
41 #include "prims/jniFastGetField.hpp"
42 #include "prims/jvm.h"
43 #include "prims/jvm_misc.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/atomic.inline.hpp"
46 #include "runtime/extendedPC.hpp"
47 #include "runtime/globals.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/java.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/mutexLocker.hpp"
52 #include "runtime/objectMonitor.hpp"
53 #include "runtime/orderAccess.inline.hpp"
54 #include "runtime/osThread.hpp"
55 #include "runtime/perfMemory.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "runtime/statSampler.hpp"
58 #include "runtime/stubRoutines.hpp"
59 #include "runtime/thread.inline.hpp"
60 #include "runtime/threadCritical.hpp"
61 #include "runtime/timer.hpp"
62 #include "runtime/vm_version.hpp"
63 #include "services/attachListener.hpp"
64 #include "services/memTracker.hpp"
65 #include "services/runtimeService.hpp"
66 #include "utilities/decoder.hpp"
67 #include "utilities/defaultStream.hpp"
68 #include "utilities/events.hpp"
69 #include "utilities/growableArray.hpp"
70 #include "utilities/vmError.hpp"
71
72 // put OS-includes here
73 # include <dlfcn.h>
74 # include <errno.h>
75 # include <exception>
76 # include <link.h>
77 # include <poll.h>
78 # include <pthread.h>
79 # include <pwd.h>
80 # include <schedctl.h>
81 # include <setjmp.h>
82 # include <signal.h>
83 # include <stdio.h>
84 # include <alloca.h>
85 # include <sys/filio.h>
86 # include <sys/ipc.h>
87 # include <sys/lwp.h>
88 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
89 # include <sys/mman.h>
90 # include <sys/processor.h>
91 # include <sys/procset.h>
92 # include <sys/pset.h>
93 # include <sys/resource.h>
94 # include <sys/shm.h>
95 # include <sys/socket.h>
96 # include <sys/stat.h>
97 # include <sys/systeminfo.h>
98 # include <sys/time.h>
99 # include <sys/times.h>
100 # include <sys/types.h>
101 # include <sys/wait.h>
102 # include <sys/utsname.h>
103 # include <thread.h>
104 # include <unistd.h>
105 # include <sys/priocntl.h>
106 # include <sys/rtpriocntl.h>
107 # include <sys/tspriocntl.h>
108 # include <sys/iapriocntl.h>
109 # include <sys/fxpriocntl.h>
110 # include <sys/loadavg.h>
111 # include <string.h>
112 # include <stdio.h>
113
114 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
115 # include <sys/procfs.h> // see comment in <sys/procfs.h>
116
117 #define MAX_PATH (2 * K)
118
119 // for timer info max values which include all bits
120 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
121
122
123 // Here are some liblgrp types from sys/lgrp_user.h to be able to
124 // compile on older systems without this header file.
125
126 #ifndef MADV_ACCESS_LWP
127 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
128 #endif
129 #ifndef MADV_ACCESS_MANY
130 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */
131 #endif
132
133 #ifndef LGRP_RSRC_CPU
134 #define LGRP_RSRC_CPU 0 /* CPU resources */
135 #endif
136 #ifndef LGRP_RSRC_MEM
137 #define LGRP_RSRC_MEM 1 /* memory resources */
138 #endif
139
140 // see thr_setprio(3T) for the basis of these numbers
141 #define MinimumPriority 0
142 #define NormalPriority 64
143 #define MaximumPriority 127
144
145 // Values for ThreadPriorityPolicy == 1
146 int prio_policy1[CriticalPriority+1] = {
147 -99999, 0, 16, 32, 48, 64,
148 80, 96, 112, 124, 127, 127 };
149
150 // System parameters used internally
151 static clock_t clock_tics_per_sec = 100;
152
153 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
154 static bool enabled_extended_FILE_stdio = false;
155
156 // For diagnostics to print a message once. see run_periodic_checks
157 static bool check_addr0_done = false;
158 static sigset_t check_signal_done;
159 static bool check_signals = true;
160
161 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
162 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
163
164 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
165
166
167 // "default" initializers for missing libc APIs
168 extern "C" {
169 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
170 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
171
172 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
173 static int lwp_cond_destroy(cond_t *cv) { return 0; }
174 }
175
176 // "default" initializers for pthread-based synchronization
177 extern "C" {
178 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
179 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
180 }
181
182 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time);
183
184 // Thread Local Storage
185 // This is common to all Solaris platforms so it is defined here,
186 // in this common file.
187 // The declarations are in the os_cpu threadLS*.hpp files.
188 //
189 // Static member initialization for TLS
190 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
191
192 #ifndef PRODUCT
193 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
194
195 int ThreadLocalStorage::_tcacheHit = 0;
196 int ThreadLocalStorage::_tcacheMiss = 0;
197
198 void ThreadLocalStorage::print_statistics() {
199 int total = _tcacheMiss+_tcacheHit;
200 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
201 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
202 }
203 #undef _PCT
204 #endif // PRODUCT
205
206 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
207 int index) {
208 Thread *thread = get_thread_slow();
209 if (thread != NULL) {
210 address sp = os::current_stack_pointer();
211 guarantee(thread->_stack_base == NULL ||
212 (sp <= thread->_stack_base &&
213 sp >= thread->_stack_base - thread->_stack_size) ||
214 is_error_reported(),
215 "sp must be inside of selected thread stack");
216
217 thread->set_self_raw_id(raw_id); // mark for quick retrieval
218 _get_thread_cache[index] = thread;
219 }
220 return thread;
221 }
222
223
224 static const double all_zero[sizeof(Thread) / sizeof(double) + 1] = {0};
225 #define NO_CACHED_THREAD ((Thread*)all_zero)
226
227 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
228
229 // Store the new value before updating the cache to prevent a race
230 // between get_thread_via_cache_slowly() and this store operation.
231 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
232
233 // Update thread cache with new thread if setting on thread create,
234 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
235 uintptr_t raw = pd_raw_thread_id();
236 int ix = pd_cache_index(raw);
237 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
238 }
239
240 void ThreadLocalStorage::pd_init() {
241 for (int i = 0; i < _pd_cache_size; i++) {
242 _get_thread_cache[i] = NO_CACHED_THREAD;
243 }
244 }
245
246 // Invalidate all the caches (happens to be the same as pd_init).
247 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
248
249 #undef NO_CACHED_THREAD
250
251 // END Thread Local Storage
252
253 static inline size_t adjust_stack_size(address base, size_t size) {
254 if ((ssize_t)size < 0) {
255 // 4759953: Compensate for ridiculous stack size.
256 size = max_intx;
257 }
258 if (size > (size_t)base) {
259 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
260 size = (size_t)base;
261 }
262 return size;
263 }
264
265 static inline stack_t get_stack_info() {
266 stack_t st;
267 int retval = thr_stksegment(&st);
268 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
269 assert(retval == 0, "incorrect return value from thr_stksegment");
270 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
271 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
272 return st;
273 }
274
275 address os::current_stack_base() {
276 int r = thr_main();
277 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
278 bool is_primordial_thread = r;
279
280 // Workaround 4352906, avoid calls to thr_stksegment by
281 // thr_main after the first one (it looks like we trash
282 // some data, causing the value for ss_sp to be incorrect).
283 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
284 stack_t st = get_stack_info();
285 if (is_primordial_thread) {
286 // cache initial value of stack base
287 os::Solaris::_main_stack_base = (address)st.ss_sp;
288 }
289 return (address)st.ss_sp;
290 } else {
291 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
292 return os::Solaris::_main_stack_base;
293 }
294 }
295
296 size_t os::current_stack_size() {
297 size_t size;
298
299 int r = thr_main();
300 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
301 if (!r) {
302 size = get_stack_info().ss_size;
303 } else {
304 struct rlimit limits;
305 getrlimit(RLIMIT_STACK, &limits);
306 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
307 }
308 // base may not be page aligned
309 address base = current_stack_base();
310 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
311 return (size_t)(base - bottom);
312 }
313
314 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
315 return localtime_r(clock, res);
316 }
317
318 void os::Solaris::try_enable_extended_io() {
319 typedef int (*enable_extended_FILE_stdio_t)(int, int);
320
321 if (!UseExtendedFileIO) {
322 return;
323 }
324
325 enable_extended_FILE_stdio_t enabler =
326 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
327 "enable_extended_FILE_stdio");
328 if (enabler) {
329 enabler(-1, -1);
330 }
331 }
332
333 static int _processors_online = 0;
334
335 jint os::Solaris::_os_thread_limit = 0;
336 volatile jint os::Solaris::_os_thread_count = 0;
337
338 julong os::available_memory() {
339 return Solaris::available_memory();
340 }
341
342 julong os::Solaris::available_memory() {
343 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
344 }
345
346 julong os::Solaris::_physical_memory = 0;
347
348 julong os::physical_memory() {
349 return Solaris::physical_memory();
350 }
351
352 static hrtime_t first_hrtime = 0;
353 static const hrtime_t hrtime_hz = 1000*1000*1000;
354 static volatile hrtime_t max_hrtime = 0;
355
356
357 void os::Solaris::initialize_system_info() {
358 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
359 _processors_online = sysconf(_SC_NPROCESSORS_ONLN);
360 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) *
361 (julong)sysconf(_SC_PAGESIZE);
362 }
363
364 int os::active_processor_count() {
365 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
366 pid_t pid = getpid();
367 psetid_t pset = PS_NONE;
368 // Are we running in a processor set or is there any processor set around?
369 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
370 uint_t pset_cpus;
371 // Query the number of cpus available to us.
372 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
373 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
374 _processors_online = pset_cpus;
375 return pset_cpus;
376 }
377 }
378 // Otherwise return number of online cpus
379 return online_cpus;
380 }
381
382 static bool find_processors_in_pset(psetid_t pset,
383 processorid_t** id_array,
384 uint_t* id_length) {
385 bool result = false;
386 // Find the number of processors in the processor set.
387 if (pset_info(pset, NULL, id_length, NULL) == 0) {
388 // Make up an array to hold their ids.
389 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
390 // Fill in the array with their processor ids.
391 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
392 result = true;
393 }
394 }
395 return result;
396 }
397
398 // Callers of find_processors_online() must tolerate imprecise results --
399 // the system configuration can change asynchronously because of DR
400 // or explicit psradm operations.
401 //
402 // We also need to take care that the loop (below) terminates as the
403 // number of processors online can change between the _SC_NPROCESSORS_ONLN
404 // request and the loop that builds the list of processor ids. Unfortunately
405 // there's no reliable way to determine the maximum valid processor id,
406 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
407 // man pages, which claim the processor id set is "sparse, but
408 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
409 // exit the loop.
410 //
411 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
412 // not available on S8.0.
413
414 static bool find_processors_online(processorid_t** id_array,
415 uint* id_length) {
416 const processorid_t MAX_PROCESSOR_ID = 100000;
417 // Find the number of processors online.
418 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
419 // Make up an array to hold their ids.
420 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
421 // Processors need not be numbered consecutively.
422 long found = 0;
423 processorid_t next = 0;
424 while (found < *id_length && next < MAX_PROCESSOR_ID) {
425 processor_info_t info;
426 if (processor_info(next, &info) == 0) {
427 // NB, PI_NOINTR processors are effectively online ...
428 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
429 (*id_array)[found] = next;
430 found += 1;
431 }
432 }
433 next += 1;
434 }
435 if (found < *id_length) {
436 // The loop above didn't identify the expected number of processors.
437 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
438 // and re-running the loop, above, but there's no guarantee of progress
439 // if the system configuration is in flux. Instead, we just return what
440 // we've got. Note that in the worst case find_processors_online() could
441 // return an empty set. (As a fall-back in the case of the empty set we
442 // could just return the ID of the current processor).
443 *id_length = found;
444 }
445
446 return true;
447 }
448
449 static bool assign_distribution(processorid_t* id_array,
450 uint id_length,
451 uint* distribution,
452 uint distribution_length) {
453 // We assume we can assign processorid_t's to uint's.
454 assert(sizeof(processorid_t) == sizeof(uint),
455 "can't convert processorid_t to uint");
456 // Quick check to see if we won't succeed.
457 if (id_length < distribution_length) {
458 return false;
459 }
460 // Assign processor ids to the distribution.
461 // Try to shuffle processors to distribute work across boards,
462 // assuming 4 processors per board.
463 const uint processors_per_board = ProcessDistributionStride;
464 // Find the maximum processor id.
465 processorid_t max_id = 0;
466 for (uint m = 0; m < id_length; m += 1) {
467 max_id = MAX2(max_id, id_array[m]);
468 }
469 // The next id, to limit loops.
470 const processorid_t limit_id = max_id + 1;
471 // Make up markers for available processors.
472 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
473 for (uint c = 0; c < limit_id; c += 1) {
474 available_id[c] = false;
475 }
476 for (uint a = 0; a < id_length; a += 1) {
477 available_id[id_array[a]] = true;
478 }
479 // Step by "boards", then by "slot", copying to "assigned".
480 // NEEDS_CLEANUP: The assignment of processors should be stateful,
481 // remembering which processors have been assigned by
482 // previous calls, etc., so as to distribute several
483 // independent calls of this method. What we'd like is
484 // It would be nice to have an API that let us ask
485 // how many processes are bound to a processor,
486 // but we don't have that, either.
487 // In the short term, "board" is static so that
488 // subsequent distributions don't all start at board 0.
489 static uint board = 0;
490 uint assigned = 0;
491 // Until we've found enough processors ....
492 while (assigned < distribution_length) {
493 // ... find the next available processor in the board.
494 for (uint slot = 0; slot < processors_per_board; slot += 1) {
495 uint try_id = board * processors_per_board + slot;
496 if ((try_id < limit_id) && (available_id[try_id] == true)) {
497 distribution[assigned] = try_id;
498 available_id[try_id] = false;
499 assigned += 1;
500 break;
501 }
502 }
503 board += 1;
504 if (board * processors_per_board + 0 >= limit_id) {
505 board = 0;
506 }
507 }
508 if (available_id != NULL) {
509 FREE_C_HEAP_ARRAY(bool, available_id);
510 }
511 return true;
512 }
513
514 void os::set_native_thread_name(const char *name) {
515 // Not yet implemented.
516 return;
517 }
518
519 bool os::distribute_processes(uint length, uint* distribution) {
520 bool result = false;
521 // Find the processor id's of all the available CPUs.
522 processorid_t* id_array = NULL;
523 uint id_length = 0;
524 // There are some races between querying information and using it,
525 // since processor sets can change dynamically.
526 psetid_t pset = PS_NONE;
527 // Are we running in a processor set?
528 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
529 result = find_processors_in_pset(pset, &id_array, &id_length);
530 } else {
531 result = find_processors_online(&id_array, &id_length);
532 }
533 if (result == true) {
534 if (id_length >= length) {
535 result = assign_distribution(id_array, id_length, distribution, length);
536 } else {
537 result = false;
538 }
539 }
540 if (id_array != NULL) {
541 FREE_C_HEAP_ARRAY(processorid_t, id_array);
542 }
543 return result;
544 }
545
546 bool os::bind_to_processor(uint processor_id) {
547 // We assume that a processorid_t can be stored in a uint.
548 assert(sizeof(uint) == sizeof(processorid_t),
549 "can't convert uint to processorid_t");
550 int bind_result =
551 processor_bind(P_LWPID, // bind LWP.
552 P_MYID, // bind current LWP.
553 (processorid_t) processor_id, // id.
554 NULL); // don't return old binding.
555 return (bind_result == 0);
556 }
557
558 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
613 char cpu_arch[12];
614 // Buffer that fits several sprintfs.
615 // Note that the space for the colon and the trailing null are provided
616 // by the nulls included by the sizeof operator.
617 const size_t bufsize =
618 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends.
619 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path
620 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir
621 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal);
622
623 // sysclasspath, java_home, dll_dir
624 {
625 char *pslash;
626 os::jvm_path(buf, bufsize);
627
628 // Found the full path to libjvm.so.
629 // Now cut the path to <java_home>/jre if we can.
630 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so.
631 pslash = strrchr(buf, '/');
632 if (pslash != NULL) {
633 *pslash = '\0'; // Get rid of /{client|server|hotspot}.
634 }
635 Arguments::set_dll_dir(buf);
636
637 if (pslash != NULL) {
638 pslash = strrchr(buf, '/');
639 if (pslash != NULL) {
640 *pslash = '\0'; // Get rid of /<arch>.
641 pslash = strrchr(buf, '/');
642 if (pslash != NULL) {
643 *pslash = '\0'; // Get rid of /lib.
644 }
645 }
646 }
647 Arguments::set_java_home(buf);
648 set_boot_path('/', ':');
649 }
650
651 // Where to look for native libraries.
652 {
653 // Use dlinfo() to determine the correct java.library.path.
654 //
655 // If we're launched by the Java launcher, and the user
656 // does not set java.library.path explicitly on the commandline,
657 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
658 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
659 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
660 // /usr/lib), which is exactly what we want.
661 //
662 // If the user does set java.library.path, it completely
663 // overwrites this setting, and always has.
664 //
665 // If we're not launched by the Java launcher, we may
666 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
667 // settings. Again, dlinfo does exactly what we want.
668
669 Dl_serinfo info_sz, *info = &info_sz;
670 Dl_serpath *path;
671 char *library_path;
672 char *common_path = buf;
673
674 // Determine search path count and required buffer size.
675 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
676 FREE_C_HEAP_ARRAY(char, buf);
677 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
678 }
679
680 // Allocate new buffer and initialize.
681 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal);
682 info->dls_size = info_sz.dls_size;
683 info->dls_cnt = info_sz.dls_cnt;
684
685 // Obtain search path information.
686 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
687 FREE_C_HEAP_ARRAY(char, buf);
688 FREE_C_HEAP_ARRAY(char, info);
689 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
690 }
691
692 path = &info->dls_serpath[0];
693
694 // Note: Due to a legacy implementation, most of the library path
695 // is set in the launcher. This was to accomodate linking restrictions
696 // on legacy Solaris implementations (which are no longer supported).
697 // Eventually, all the library path setting will be done here.
698 //
699 // However, to prevent the proliferation of improperly built native
700 // libraries, the new path component /usr/jdk/packages is added here.
701
702 // Determine the actual CPU architecture.
703 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
704 #ifdef _LP64
705 // If we are a 64-bit vm, perform the following translations:
706 // sparc -> sparcv9
707 // i386 -> amd64
708 if (strcmp(cpu_arch, "sparc") == 0) {
709 strcat(cpu_arch, "v9");
710 } else if (strcmp(cpu_arch, "i386") == 0) {
711 strcpy(cpu_arch, "amd64");
712 }
713 #endif
714
715 // Construct the invariant part of ld_library_path.
716 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch);
717
718 // Struct size is more than sufficient for the path components obtained
719 // through the dlinfo() call, so only add additional space for the path
720 // components explicitly added here.
721 size_t library_path_size = info->dls_size + strlen(common_path);
722 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal);
723 library_path[0] = '\0';
724
725 // Construct the desired Java library path from the linker's library
726 // search path.
727 //
728 // For compatibility, it is optimal that we insert the additional path
729 // components specific to the Java VM after those components specified
730 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
731 // infrastructure.
732 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it.
733 strcpy(library_path, common_path);
734 } else {
735 int inserted = 0;
736 int i;
737 for (i = 0; i < info->dls_cnt; i++, path++) {
738 uint_t flags = path->dls_flags & LA_SER_MASK;
739 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
740 strcat(library_path, common_path);
741 strcat(library_path, os::path_separator());
742 inserted = 1;
743 }
744 strcat(library_path, path->dls_name);
745 strcat(library_path, os::path_separator());
746 }
747 // Eliminate trailing path separator.
748 library_path[strlen(library_path)-1] = '\0';
749 }
750
751 // happens before argument parsing - can't use a trace flag
752 // tty->print_raw("init_system_properties_values: native lib path: ");
753 // tty->print_raw_cr(library_path);
754
755 // Callee copies into its own buffer.
756 Arguments::set_library_path(library_path);
757
758 FREE_C_HEAP_ARRAY(char, library_path);
759 FREE_C_HEAP_ARRAY(char, info);
760 }
761
762 // Extensions directories.
763 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home());
764 Arguments::set_ext_dirs(buf);
765
766 FREE_C_HEAP_ARRAY(char, buf);
767
768 #undef SYS_EXT_DIR
769 #undef EXTENSIONS_DIR
770 }
771
772 void os::breakpoint() {
773 BREAKPOINT;
774 }
775
776 bool os::obsolete_option(const JavaVMOption *option) {
777 if (!strncmp(option->optionString, "-Xt", 3)) {
778 return true;
779 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
780 return true;
781 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
782 return true;
783 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
784 return true;
785 }
786 return false;
787 }
788
789 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
790 address stackStart = (address)thread->stack_base();
791 address stackEnd = (address)(stackStart - (address)thread->stack_size());
792 if (sp < stackStart && sp >= stackEnd) return true;
793 return false;
794 }
795
796 extern "C" void breakpoint() {
797 // use debugger to set breakpoint here
798 }
799
800 static thread_t main_thread;
801
802 // Thread start routine for all new Java threads
803 extern "C" void* java_start(void* thread_addr) {
804 // Try to randomize the cache line index of hot stack frames.
805 // This helps when threads of the same stack traces evict each other's
806 // cache lines. The threads can be either from the same JVM instance, or
807 // from different JVM instances. The benefit is especially true for
808 // processors with hyperthreading technology.
809 static int counter = 0;
810 int pid = os::current_process_id();
811 alloca(((pid ^ counter++) & 7) * 128);
812
813 int prio;
814 Thread* thread = (Thread*)thread_addr;
815 OSThread* osthr = thread->osthread();
816
817 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound
818 thread->_schedctl = (void *) schedctl_init();
819
820 if (UseNUMA) {
821 int lgrp_id = os::numa_get_group_id();
822 if (lgrp_id != -1) {
823 thread->set_lgrp_id(lgrp_id);
824 }
825 }
826
827 // If the creator called set priority before we started,
828 // we need to call set_native_priority now that we have an lwp.
829 // We used to get the priority from thr_getprio (we called
830 // thr_setprio way back in create_thread) and pass it to
831 // set_native_priority, but Solaris scales the priority
832 // in java_to_os_priority, so when we read it back here,
833 // we pass trash to set_native_priority instead of what's
834 // in java_to_os_priority. So we save the native priority
835 // in the osThread and recall it here.
836
837 if (osthr->thread_id() != -1) {
838 if (UseThreadPriorities) {
839 int prio = osthr->native_priority();
840 if (ThreadPriorityVerbose) {
841 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
842 INTPTR_FORMAT ", setting priority: %d\n",
843 osthr->thread_id(), osthr->lwp_id(), prio);
844 }
845 os::set_native_priority(thread, prio);
846 }
847 } else if (ThreadPriorityVerbose) {
848 warning("Can't set priority in _start routine, thread id hasn't been set\n");
849 }
850
851 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
852
853 // initialize signal mask for this thread
854 os::Solaris::hotspot_sigmask(thread);
855
856 thread->run();
857
858 // One less thread is executing
859 // When the VMThread gets here, the main thread may have already exited
860 // which frees the CodeHeap containing the Atomic::dec code
861 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
862 Atomic::dec(&os::Solaris::_os_thread_count);
863 }
864
865 if (UseDetachedThreads) {
866 thr_exit(NULL);
867 ShouldNotReachHere();
868 }
869 return NULL;
870 }
871
872 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
873 // Allocate the OSThread object
874 OSThread* osthread = new OSThread(NULL, NULL);
875 if (osthread == NULL) return NULL;
876
877 // Store info on the Solaris thread into the OSThread
878 osthread->set_thread_id(thread_id);
879 osthread->set_lwp_id(_lwp_self());
880 thread->_schedctl = (void *) schedctl_init();
881
882 if (UseNUMA) {
883 int lgrp_id = os::numa_get_group_id();
884 if (lgrp_id != -1) {
885 thread->set_lgrp_id(lgrp_id);
886 }
887 }
888
889 if (ThreadPriorityVerbose) {
890 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
891 osthread->thread_id(), osthread->lwp_id());
892 }
893
894 // Initial thread state is INITIALIZED, not SUSPENDED
895 osthread->set_state(INITIALIZED);
896
897 return osthread;
898 }
899
900 void os::Solaris::hotspot_sigmask(Thread* thread) {
901 //Save caller's signal mask
902 sigset_t sigmask;
903 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
904 OSThread *osthread = thread->osthread();
905 osthread->set_caller_sigmask(sigmask);
906
907 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
908 if (!ReduceSignalUsage) {
909 if (thread->is_VM_thread()) {
910 // Only the VM thread handles BREAK_SIGNAL ...
911 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
912 } else {
913 // ... all other threads block BREAK_SIGNAL
914 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
915 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
916 }
917 }
918 }
919
920 bool os::create_attached_thread(JavaThread* thread) {
921 #ifdef ASSERT
922 thread->verify_not_published();
923 #endif
924 OSThread* osthread = create_os_thread(thread, thr_self());
925 if (osthread == NULL) {
926 return false;
927 }
928
929 // Initial thread state is RUNNABLE
930 osthread->set_state(RUNNABLE);
931 thread->set_osthread(osthread);
932
933 // initialize signal mask for this thread
934 // and save the caller's signal mask
935 os::Solaris::hotspot_sigmask(thread);
936
937 return true;
938 }
939
940 bool os::create_main_thread(JavaThread* thread) {
941 #ifdef ASSERT
942 thread->verify_not_published();
943 #endif
944 if (_starting_thread == NULL) {
945 _starting_thread = create_os_thread(thread, main_thread);
946 if (_starting_thread == NULL) {
947 return false;
948 }
949 }
950
951 // The primodial thread is runnable from the start
952 _starting_thread->set_state(RUNNABLE);
953
954 thread->set_osthread(_starting_thread);
955
956 // initialize signal mask for this thread
957 // and save the caller's signal mask
958 os::Solaris::hotspot_sigmask(thread);
959
960 return true;
961 }
962
963
964 bool os::create_thread(Thread* thread, ThreadType thr_type,
965 size_t stack_size) {
966 // Allocate the OSThread object
967 OSThread* osthread = new OSThread(NULL, NULL);
968 if (osthread == NULL) {
969 return false;
970 }
971
972 if (ThreadPriorityVerbose) {
973 char *thrtyp;
974 switch (thr_type) {
975 case vm_thread:
976 thrtyp = (char *)"vm";
977 break;
978 case cgc_thread:
979 thrtyp = (char *)"cgc";
980 break;
981 case pgc_thread:
982 thrtyp = (char *)"pgc";
983 break;
984 case java_thread:
985 thrtyp = (char *)"java";
986 break;
987 case compiler_thread:
988 thrtyp = (char *)"compiler";
989 break;
990 case watcher_thread:
991 thrtyp = (char *)"watcher";
992 break;
993 default:
994 thrtyp = (char *)"unknown";
995 break;
996 }
997 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
998 }
999
1000 // Calculate stack size if it's not specified by caller.
1001 if (stack_size == 0) {
1002 // The default stack size 1M (2M for LP64).
1003 stack_size = (BytesPerWord >> 2) * K * K;
1004
1005 switch (thr_type) {
1006 case os::java_thread:
1007 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
1008 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
1009 break;
1010 case os::compiler_thread:
1011 if (CompilerThreadStackSize > 0) {
1012 stack_size = (size_t)(CompilerThreadStackSize * K);
1013 break;
1014 } // else fall through:
1015 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1016 case os::vm_thread:
1017 case os::pgc_thread:
1018 case os::cgc_thread:
1019 case os::watcher_thread:
1020 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1021 break;
1022 }
1023 }
1024 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1025
1026 // Initial state is ALLOCATED but not INITIALIZED
1027 osthread->set_state(ALLOCATED);
1028
1029 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1030 // We got lots of threads. Check if we still have some address space left.
1031 // Need to be at least 5Mb of unreserved address space. We do check by
1032 // trying to reserve some.
1033 const size_t VirtualMemoryBangSize = 20*K*K;
1034 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1035 if (mem == NULL) {
1036 delete osthread;
1037 return false;
1038 } else {
1039 // Release the memory again
1040 os::release_memory(mem, VirtualMemoryBangSize);
1041 }
1042 }
1043
1044 // Setup osthread because the child thread may need it.
1045 thread->set_osthread(osthread);
1046
1047 // Create the Solaris thread
1048 thread_t tid = 0;
1049 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED;
1050 int status;
1051
1052 // Mark that we don't have an lwp or thread id yet.
1053 // In case we attempt to set the priority before the thread starts.
1054 osthread->set_lwp_id(-1);
1055 osthread->set_thread_id(-1);
1056
1057 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1058 if (status != 0) {
1059 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1060 perror("os::create_thread");
1061 }
1062 thread->set_osthread(NULL);
1063 // Need to clean up stuff we've allocated so far
1064 delete osthread;
1065 return false;
1066 }
1067
1068 Atomic::inc(&os::Solaris::_os_thread_count);
1069
1070 // Store info on the Solaris thread into the OSThread
1071 osthread->set_thread_id(tid);
1072
1073 // Remember that we created this thread so we can set priority on it
1074 osthread->set_vm_created();
1075
1076 // Initial thread state is INITIALIZED, not SUSPENDED
1077 osthread->set_state(INITIALIZED);
1078
1079 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1080 return true;
1081 }
1082
1083 // defined for >= Solaris 10. This allows builds on earlier versions
1084 // of Solaris to take advantage of the newly reserved Solaris JVM signals
1085 // With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1086 // and -XX:+UseAltSigs does nothing since these should have no conflict
1087 //
1088 #if !defined(SIGJVM1)
1089 #define SIGJVM1 39
1090 #define SIGJVM2 40
1091 #endif
1092
1093 debug_only(static bool signal_sets_initialized = false);
1094 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1095 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1096 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1097
1098 bool os::Solaris::is_sig_ignored(int sig) {
1099 struct sigaction oact;
1100 sigaction(sig, (struct sigaction*)NULL, &oact);
1101 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1102 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1103 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) {
1104 return true;
1105 } else {
1106 return false;
1107 }
1108 }
1109
1110 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1111 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1112 static bool isJVM1available() {
1113 return SIGJVM1 < SIGRTMIN;
1114 }
1115
1116 void os::Solaris::signal_sets_init() {
1117 // Should also have an assertion stating we are still single-threaded.
1118 assert(!signal_sets_initialized, "Already initialized");
1119 // Fill in signals that are necessarily unblocked for all threads in
1120 // the VM. Currently, we unblock the following signals:
1121 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1122 // by -Xrs (=ReduceSignalUsage));
1123 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1124 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1125 // the dispositions or masks wrt these signals.
1126 // Programs embedding the VM that want to use the above signals for their
1127 // own purposes must, at this time, use the "-Xrs" option to prevent
1128 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1129 // (See bug 4345157, and other related bugs).
1130 // In reality, though, unblocking these signals is really a nop, since
1131 // these signals are not blocked by default.
1132 sigemptyset(&unblocked_sigs);
1133 sigemptyset(&allowdebug_blocked_sigs);
1134 sigaddset(&unblocked_sigs, SIGILL);
1135 sigaddset(&unblocked_sigs, SIGSEGV);
1136 sigaddset(&unblocked_sigs, SIGBUS);
1137 sigaddset(&unblocked_sigs, SIGFPE);
1138
1139 if (isJVM1available) {
1140 os::Solaris::set_SIGinterrupt(SIGJVM1);
1141 os::Solaris::set_SIGasync(SIGJVM2);
1142 } else if (UseAltSigs) {
1143 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1144 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1145 } else {
1146 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1147 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1148 }
1149
1150 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1151 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1152
1153 if (!ReduceSignalUsage) {
1154 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1155 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1156 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1157 }
1158 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1159 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1160 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1161 }
1162 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1163 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1164 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1165 }
1166 }
1167 // Fill in signals that are blocked by all but the VM thread.
1168 sigemptyset(&vm_sigs);
1169 if (!ReduceSignalUsage) {
1170 sigaddset(&vm_sigs, BREAK_SIGNAL);
1171 }
1172 debug_only(signal_sets_initialized = true);
1173
1174 // For diagnostics only used in run_periodic_checks
1175 sigemptyset(&check_signal_done);
1176 }
1177
1178 // These are signals that are unblocked while a thread is running Java.
1179 // (For some reason, they get blocked by default.)
1180 sigset_t* os::Solaris::unblocked_signals() {
1181 assert(signal_sets_initialized, "Not initialized");
1182 return &unblocked_sigs;
1183 }
1184
1185 // These are the signals that are blocked while a (non-VM) thread is
1186 // running Java. Only the VM thread handles these signals.
1187 sigset_t* os::Solaris::vm_signals() {
1188 assert(signal_sets_initialized, "Not initialized");
1189 return &vm_sigs;
1190 }
1191
1192 // These are signals that are blocked during cond_wait to allow debugger in
1193 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1194 assert(signal_sets_initialized, "Not initialized");
1195 return &allowdebug_blocked_sigs;
1196 }
1197
1198
1199 void _handle_uncaught_cxx_exception() {
1200 VMError err("An uncaught C++ exception");
1201 err.report_and_die();
1202 }
1203
1204
1205 // First crack at OS-specific initialization, from inside the new thread.
1206 void os::initialize_thread(Thread* thr) {
1207 int r = thr_main();
1208 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
1209 if (r) {
1210 JavaThread* jt = (JavaThread *)thr;
1211 assert(jt != NULL, "Sanity check");
1212 size_t stack_size;
1213 address base = jt->stack_base();
1214 if (Arguments::created_by_java_launcher()) {
1215 // Use 2MB to allow for Solaris 7 64 bit mode.
1216 stack_size = JavaThread::stack_size_at_create() == 0
1217 ? 2048*K : JavaThread::stack_size_at_create();
1218
1219 // There are rare cases when we may have already used more than
1220 // the basic stack size allotment before this method is invoked.
1221 // Attempt to allow for a normally sized java_stack.
1222 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1223 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1224 } else {
1225 // 6269555: If we were not created by a Java launcher, i.e. if we are
1226 // running embedded in a native application, treat the primordial thread
1227 // as much like a native attached thread as possible. This means using
1228 // the current stack size from thr_stksegment(), unless it is too large
1229 // to reliably setup guard pages. A reasonable max size is 8MB.
1230 size_t current_size = current_stack_size();
1231 // This should never happen, but just in case....
1232 if (current_size == 0) current_size = 2 * K * K;
1233 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1234 }
1235 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1236 stack_size = (size_t)(base - bottom);
1237
1238 assert(stack_size > 0, "Stack size calculation problem");
1239
1240 if (stack_size > jt->stack_size()) {
1241 #ifndef PRODUCT
1242 struct rlimit limits;
1243 getrlimit(RLIMIT_STACK, &limits);
1244 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1245 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1246 #endif
1247 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n"
1248 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1249 "See limit(1) to increase the stack size limit.",
1250 stack_size / K, jt->stack_size() / K);
1251 vm_exit(1);
1252 }
1253 assert(jt->stack_size() >= stack_size,
1254 "Attempt to map more stack than was allocated");
1255 jt->set_stack_size(stack_size);
1256 }
1257
1258 // With the T2 libthread (T1 is no longer supported) threads are always bound
1259 // and we use stackbanging in all cases.
1260
1261 os::Solaris::init_thread_fpu_state();
1262 std::set_terminate(_handle_uncaught_cxx_exception);
1263 }
1264
1265
1266
1267 // Free Solaris resources related to the OSThread
1268 void os::free_thread(OSThread* osthread) {
1269 assert(osthread != NULL, "os::free_thread but osthread not set");
1270
1271
1272 // We are told to free resources of the argument thread,
1273 // but we can only really operate on the current thread.
1274 // The main thread must take the VMThread down synchronously
1275 // before the main thread exits and frees up CodeHeap
1276 guarantee((Thread::current()->osthread() == osthread
1277 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1278 if (Thread::current()->osthread() == osthread) {
1279 // Restore caller's signal mask
1280 sigset_t sigmask = osthread->caller_sigmask();
1281 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1282 }
1283 delete osthread;
1284 }
1285
1286 void os::pd_start_thread(Thread* thread) {
1287 int status = thr_continue(thread->osthread()->thread_id());
1288 assert_status(status == 0, status, "thr_continue failed");
1289 }
1290
1291
1292 intx os::current_thread_id() {
1293 return (intx)thr_self();
1294 }
1295
1296 static pid_t _initial_pid = 0;
1297
1298 int os::current_process_id() {
1299 return (int)(_initial_pid ? _initial_pid : getpid());
1300 }
1301
1302 int os::allocate_thread_local_storage() {
1303 // %%% in Win32 this allocates a memory segment pointed to by a
1304 // register. Dan Stein can implement a similar feature in
1305 // Solaris. Alternatively, the VM can do the same thing
1306 // explicitly: malloc some storage and keep the pointer in a
1307 // register (which is part of the thread's context) (or keep it
1308 // in TLS).
1309 // %%% In current versions of Solaris, thr_self and TSD can
1310 // be accessed via short sequences of displaced indirections.
1311 // The value of thr_self is available as %g7(36).
1312 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1313 // assuming that the current thread already has a value bound to k.
1314 // It may be worth experimenting with such access patterns,
1315 // and later having the parameters formally exported from a Solaris
1316 // interface. I think, however, that it will be faster to
1317 // maintain the invariant that %g2 always contains the
1318 // JavaThread in Java code, and have stubs simply
1319 // treat %g2 as a caller-save register, preserving it in a %lN.
1320 thread_key_t tk;
1321 if (thr_keycreate(&tk, NULL)) {
1322 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1323 "(%s)", strerror(errno)));
1324 }
1325 return int(tk);
1326 }
1327
1328 void os::free_thread_local_storage(int index) {
1329 // %%% don't think we need anything here
1330 // if (pthread_key_delete((pthread_key_t) tk)) {
1331 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1332 // }
1333 }
1334
1335 // libthread allocate for tsd_common is a version specific
1336 // small number - point is NO swap space available
1337 #define SMALLINT 32
1338 void os::thread_local_storage_at_put(int index, void* value) {
1339 // %%% this is used only in threadLocalStorage.cpp
1340 if (thr_setspecific((thread_key_t)index, value)) {
1341 if (errno == ENOMEM) {
1342 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR,
1343 "thr_setspecific: out of swap space");
1344 } else {
1345 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1346 "(%s)", strerror(errno)));
1347 }
1348 } else {
1349 ThreadLocalStorage::set_thread_in_slot((Thread *) value);
1350 }
1351 }
1352
1353 // This function could be called before TLS is initialized, for example, when
1354 // VM receives an async signal or when VM causes a fatal error during
1355 // initialization. Return NULL if thr_getspecific() fails.
1356 void* os::thread_local_storage_at(int index) {
1357 // %%% this is used only in threadLocalStorage.cpp
1358 void* r = NULL;
1359 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1360 }
1361
1362
1363 // gethrtime() should be monotonic according to the documentation,
1364 // but some virtualized platforms are known to break this guarantee.
1365 // getTimeNanos() must be guaranteed not to move backwards, so we
1366 // are forced to add a check here.
1367 inline hrtime_t getTimeNanos() {
1368 const hrtime_t now = gethrtime();
1369 const hrtime_t prev = max_hrtime;
1370 if (now <= prev) {
1371 return prev; // same or retrograde time;
1372 }
1373 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1374 assert(obsv >= prev, "invariant"); // Monotonicity
1375 // If the CAS succeeded then we're done and return "now".
1376 // If the CAS failed and the observed value "obsv" is >= now then
1377 // we should return "obsv". If the CAS failed and now > obsv > prv then
1378 // some other thread raced this thread and installed a new value, in which case
1379 // we could either (a) retry the entire operation, (b) retry trying to install now
1380 // or (c) just return obsv. We use (c). No loop is required although in some cases
1381 // we might discard a higher "now" value in deference to a slightly lower but freshly
1382 // installed obsv value. That's entirely benign -- it admits no new orderings compared
1383 // to (a) or (b) -- and greatly reduces coherence traffic.
1384 // We might also condition (c) on the magnitude of the delta between obsv and now.
1385 // Avoiding excessive CAS operations to hot RW locations is critical.
1386 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate
1387 return (prev == obsv) ? now : obsv;
1388 }
1389
1390 // Time since start-up in seconds to a fine granularity.
1391 // Used by VMSelfDestructTimer and the MemProfiler.
1392 double os::elapsedTime() {
1393 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1394 }
1395
1396 jlong os::elapsed_counter() {
1397 return (jlong)(getTimeNanos() - first_hrtime);
1398 }
1399
1400 jlong os::elapsed_frequency() {
1401 return hrtime_hz;
1402 }
1403
1404 // Return the real, user, and system times in seconds from an
1405 // arbitrary fixed point in the past.
1406 bool os::getTimesSecs(double* process_real_time,
1407 double* process_user_time,
1408 double* process_system_time) {
1409 struct tms ticks;
1410 clock_t real_ticks = times(&ticks);
1411
1412 if (real_ticks == (clock_t) (-1)) {
1413 return false;
1414 } else {
1415 double ticks_per_second = (double) clock_tics_per_sec;
1416 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1417 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1418 // For consistency return the real time from getTimeNanos()
1419 // converted to seconds.
1420 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1421
1422 return true;
1423 }
1424 }
1425
1426 bool os::supports_vtime() { return true; }
1427
1428 bool os::enable_vtime() {
1429 int fd = ::open("/proc/self/ctl", O_WRONLY);
1430 if (fd == -1) {
1431 return false;
1432 }
1433
1434 long cmd[] = { PCSET, PR_MSACCT };
1435 int res = ::write(fd, cmd, sizeof(long) * 2);
1436 ::close(fd);
1437 if (res != sizeof(long) * 2) {
1438 return false;
1439 }
1440 return true;
1441 }
1442
1443 bool os::vtime_enabled() {
1444 int fd = ::open("/proc/self/status", O_RDONLY);
1445 if (fd == -1) {
1446 return false;
1447 }
1448
1449 pstatus_t status;
1450 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1451 ::close(fd);
1452 if (res != sizeof(pstatus_t)) {
1453 return false;
1454 }
1455 return status.pr_flags & PR_MSACCT;
1456 }
1457
1458 double os::elapsedVTime() {
1459 return (double)gethrvtime() / (double)hrtime_hz;
1460 }
1461
1462 // Used internally for comparisons only
1463 // getTimeMillis guaranteed to not move backwards on Solaris
1464 jlong getTimeMillis() {
1465 jlong nanotime = getTimeNanos();
1466 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1467 }
1468
1469 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1470 jlong os::javaTimeMillis() {
1471 timeval t;
1472 if (gettimeofday(&t, NULL) == -1) {
1473 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1474 }
1475 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1476 }
1477
1478 void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) {
1479 timeval t;
1480 if (gettimeofday(&t, NULL) == -1) {
1481 fatal(err_msg("os::javaTimeSystemUTC: gettimeofday (%s)", strerror(errno)));
1482 }
1483 seconds = jlong(t.tv_sec);
1484 nanos = jlong(t.tv_usec) * 1000;
1485 }
1486
1487
1488 jlong os::javaTimeNanos() {
1489 return (jlong)getTimeNanos();
1490 }
1491
1492 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1493 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1494 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1495 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1496 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1497 }
1498
1499 char * os::local_time_string(char *buf, size_t buflen) {
1500 struct tm t;
1501 time_t long_time;
1502 time(&long_time);
1503 localtime_r(&long_time, &t);
1504 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1505 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1506 t.tm_hour, t.tm_min, t.tm_sec);
1507 return buf;
1508 }
1509
1510 // Note: os::shutdown() might be called very early during initialization, or
1511 // called from signal handler. Before adding something to os::shutdown(), make
1512 // sure it is async-safe and can handle partially initialized VM.
1513 void os::shutdown() {
1514
1515 // allow PerfMemory to attempt cleanup of any persistent resources
1516 perfMemory_exit();
1517
1518 // needs to remove object in file system
1519 AttachListener::abort();
1520
1521 // flush buffered output, finish log files
1522 ostream_abort();
1523
1524 // Check for abort hook
1525 abort_hook_t abort_hook = Arguments::abort_hook();
1526 if (abort_hook != NULL) {
1527 abort_hook();
1528 }
1529 }
1530
1531 // Note: os::abort() might be called very early during initialization, or
1532 // called from signal handler. Before adding something to os::abort(), make
1533 // sure it is async-safe and can handle partially initialized VM.
1534 void os::abort(bool dump_core) {
1535 os::shutdown();
1536 if (dump_core) {
1537 #ifndef PRODUCT
1538 fdStream out(defaultStream::output_fd());
1539 out.print_raw("Current thread is ");
1540 char buf[16];
1541 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1542 out.print_raw_cr(buf);
1543 out.print_raw_cr("Dumping core ...");
1544 #endif
1545 ::abort(); // dump core (for debugging)
1546 }
1547
1548 ::exit(1);
1549 }
1550
1551 // Die immediately, no exit hook, no abort hook, no cleanup.
1552 void os::die() {
1553 ::abort(); // dump core (for debugging)
1554 }
1555
1556 // DLL functions
1557
1558 const char* os::dll_file_extension() { return ".so"; }
1559
1560 // This must be hard coded because it's the system's temporary
1561 // directory not the java application's temp directory, ala java.io.tmpdir.
1562 const char* os::get_temp_directory() { return "/tmp"; }
1563
1564 static bool file_exists(const char* filename) {
1565 struct stat statbuf;
1566 if (filename == NULL || strlen(filename) == 0) {
1567 return false;
1568 }
1569 return os::stat(filename, &statbuf) == 0;
1570 }
1571
1572 bool os::dll_build_name(char* buffer, size_t buflen,
1573 const char* pname, const char* fname) {
1574 bool retval = false;
1575 const size_t pnamelen = pname ? strlen(pname) : 0;
1576
1577 // Return error on buffer overflow.
1578 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1579 return retval;
1580 }
1581
1582 if (pnamelen == 0) {
1583 snprintf(buffer, buflen, "lib%s.so", fname);
1584 retval = true;
1585 } else if (strchr(pname, *os::path_separator()) != NULL) {
1586 int n;
1587 char** pelements = split_path(pname, &n);
1588 if (pelements == NULL) {
1589 return false;
1590 }
1591 for (int i = 0; i < n; i++) {
1592 // really shouldn't be NULL but what the heck, check can't hurt
1593 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1594 continue; // skip the empty path values
1595 }
1596 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1597 if (file_exists(buffer)) {
1598 retval = true;
1599 break;
1600 }
1601 }
1602 // release the storage
1603 for (int i = 0; i < n; i++) {
1604 if (pelements[i] != NULL) {
1605 FREE_C_HEAP_ARRAY(char, pelements[i]);
1606 }
1607 }
1608 if (pelements != NULL) {
1609 FREE_C_HEAP_ARRAY(char*, pelements);
1610 }
1611 } else {
1612 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1613 retval = true;
1614 }
1615 return retval;
1616 }
1617
1618 // check if addr is inside libjvm.so
1619 bool os::address_is_in_vm(address addr) {
1620 static address libjvm_base_addr;
1621 Dl_info dlinfo;
1622
1623 if (libjvm_base_addr == NULL) {
1624 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
1625 libjvm_base_addr = (address)dlinfo.dli_fbase;
1626 }
1627 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1628 }
1629
1630 if (dladdr((void *)addr, &dlinfo) != 0) {
1631 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1632 }
1633
1634 return false;
1635 }
1636
1637 typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int);
1638 static dladdr1_func_type dladdr1_func = NULL;
1639
1640 bool os::dll_address_to_function_name(address addr, char *buf,
1641 int buflen, int * offset) {
1642 // buf is not optional, but offset is optional
1643 assert(buf != NULL, "sanity check");
1644
1645 Dl_info dlinfo;
1646
1647 // dladdr1_func was initialized in os::init()
1648 if (dladdr1_func != NULL) {
1649 // yes, we have dladdr1
1650
1651 // Support for dladdr1 is checked at runtime; it may be
1652 // available even if the vm is built on a machine that does
1653 // not have dladdr1 support. Make sure there is a value for
1654 // RTLD_DL_SYMENT.
1655 #ifndef RTLD_DL_SYMENT
1656 #define RTLD_DL_SYMENT 1
1657 #endif
1658 #ifdef _LP64
1659 Elf64_Sym * info;
1660 #else
1661 Elf32_Sym * info;
1662 #endif
1663 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1664 RTLD_DL_SYMENT) != 0) {
1665 // see if we have a matching symbol that covers our address
1666 if (dlinfo.dli_saddr != NULL &&
1667 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1668 if (dlinfo.dli_sname != NULL) {
1669 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1670 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1671 }
1672 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1673 return true;
1674 }
1675 }
1676 // no matching symbol so try for just file info
1677 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1678 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1679 buf, buflen, offset, dlinfo.dli_fname)) {
1680 return true;
1681 }
1682 }
1683 }
1684 buf[0] = '\0';
1685 if (offset != NULL) *offset = -1;
1686 return false;
1687 }
1688
1689 // no, only dladdr is available
1690 if (dladdr((void *)addr, &dlinfo) != 0) {
1691 // see if we have a matching symbol
1692 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
1693 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
1694 jio_snprintf(buf, buflen, dlinfo.dli_sname);
1695 }
1696 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1697 return true;
1698 }
1699 // no matching symbol so try for just file info
1700 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1701 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1702 buf, buflen, offset, dlinfo.dli_fname)) {
1703 return true;
1704 }
1705 }
1706 }
1707 buf[0] = '\0';
1708 if (offset != NULL) *offset = -1;
1709 return false;
1710 }
1711
1712 bool os::dll_address_to_library_name(address addr, char* buf,
1713 int buflen, int* offset) {
1714 // buf is not optional, but offset is optional
1715 assert(buf != NULL, "sanity check");
1716
1717 Dl_info dlinfo;
1718
1719 if (dladdr((void*)addr, &dlinfo) != 0) {
1720 if (dlinfo.dli_fname != NULL) {
1721 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1722 }
1723 if (dlinfo.dli_fbase != NULL && offset != NULL) {
1724 *offset = addr - (address)dlinfo.dli_fbase;
1725 }
1726 return true;
1727 }
1728
1729 buf[0] = '\0';
1730 if (offset) *offset = -1;
1731 return false;
1732 }
1733
1734 int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) {
1735 Dl_info dli;
1736 // Sanity check?
1737 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 ||
1738 dli.dli_fname == NULL) {
1739 return 1;
1740 }
1741
1742 void * handle = dlopen(dli.dli_fname, RTLD_LAZY);
1743 if (handle == NULL) {
1744 return 1;
1745 }
1746
1747 Link_map *map;
1748 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1749 if (map == NULL) {
1750 dlclose(handle);
1751 return 1;
1752 }
1753
1754 while (map->l_prev != NULL) {
1755 map = map->l_prev;
1756 }
1757
1758 while (map != NULL) {
1759 // Iterate through all map entries and call callback with fields of interest
1760 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) {
1761 dlclose(handle);
1762 return 1;
1763 }
1764 map = map->l_next;
1765 }
1766
1767 dlclose(handle);
1768 return 0;
1769 }
1770
1771 int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) {
1772 outputStream * out = (outputStream *) param;
1773 out->print_cr(PTR_FORMAT " \t%s", base_address, name);
1774 return 0;
1775 }
1776
1777 void os::print_dll_info(outputStream * st) {
1778 st->print_cr("Dynamic libraries:"); st->flush();
1779 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) {
1780 st->print_cr("Error: Cannot print dynamic libraries.");
1781 }
1782 }
1783
1784 // Loads .dll/.so and
1785 // in case of error it checks if .dll/.so was built for the
1786 // same architecture as Hotspot is running on
1787
1788 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
1789 void * result= ::dlopen(filename, RTLD_LAZY);
1790 if (result != NULL) {
1791 // Successful loading
1792 return result;
1793 }
1794
1795 Elf32_Ehdr elf_head;
1796
1797 // Read system error message into ebuf
1798 // It may or may not be overwritten below
1799 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
1800 ebuf[ebuflen-1]='\0';
1801 int diag_msg_max_length=ebuflen-strlen(ebuf);
1802 char* diag_msg_buf=ebuf+strlen(ebuf);
1803
1804 if (diag_msg_max_length==0) {
1805 // No more space in ebuf for additional diagnostics message
1806 return NULL;
1807 }
1808
1809
1810 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1811
1812 if (file_descriptor < 0) {
1813 // Can't open library, report dlerror() message
1814 return NULL;
1815 }
1816
1817 bool failed_to_read_elf_head=
1818 (sizeof(elf_head)!=
1819 (::read(file_descriptor, &elf_head,sizeof(elf_head))));
1820
1821 ::close(file_descriptor);
1822 if (failed_to_read_elf_head) {
1823 // file i/o error - report dlerror() msg
1824 return NULL;
1825 }
1826
1827 typedef struct {
1828 Elf32_Half code; // Actual value as defined in elf.h
1829 Elf32_Half compat_class; // Compatibility of archs at VM's sense
1830 char elf_class; // 32 or 64 bit
1831 char endianess; // MSB or LSB
1832 char* name; // String representation
1833 } arch_t;
1834
1835 static const arch_t arch_array[]={
1836 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1837 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1838 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
1839 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
1840 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1841 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1842 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
1843 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
1844 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
1845 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
1846 };
1847
1848 #if (defined IA32)
1849 static Elf32_Half running_arch_code=EM_386;
1850 #elif (defined AMD64)
1851 static Elf32_Half running_arch_code=EM_X86_64;
1852 #elif (defined IA64)
1853 static Elf32_Half running_arch_code=EM_IA_64;
1854 #elif (defined __sparc) && (defined _LP64)
1855 static Elf32_Half running_arch_code=EM_SPARCV9;
1856 #elif (defined __sparc) && (!defined _LP64)
1857 static Elf32_Half running_arch_code=EM_SPARC;
1858 #elif (defined __powerpc64__)
1859 static Elf32_Half running_arch_code=EM_PPC64;
1860 #elif (defined __powerpc__)
1861 static Elf32_Half running_arch_code=EM_PPC;
1862 #elif (defined ARM)
1863 static Elf32_Half running_arch_code=EM_ARM;
1864 #else
1865 #error Method os::dll_load requires that one of following is defined:\
1866 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
1867 #endif
1868
1869 // Identify compatability class for VM's architecture and library's architecture
1870 // Obtain string descriptions for architectures
1871
1872 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
1873 int running_arch_index=-1;
1874
1875 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) {
1876 if (running_arch_code == arch_array[i].code) {
1877 running_arch_index = i;
1878 }
1879 if (lib_arch.code == arch_array[i].code) {
1880 lib_arch.compat_class = arch_array[i].compat_class;
1881 lib_arch.name = arch_array[i].name;
1882 }
1883 }
1884
1885 assert(running_arch_index != -1,
1886 "Didn't find running architecture code (running_arch_code) in arch_array");
1887 if (running_arch_index == -1) {
1888 // Even though running architecture detection failed
1889 // we may still continue with reporting dlerror() message
1890 return NULL;
1891 }
1892
1893 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
1894 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
1895 return NULL;
1896 }
1897
1898 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
1899 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
1900 return NULL;
1901 }
1902
1903 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
1904 if (lib_arch.name!=NULL) {
1905 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1906 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
1907 lib_arch.name, arch_array[running_arch_index].name);
1908 } else {
1909 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1910 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
1911 lib_arch.code,
1912 arch_array[running_arch_index].name);
1913 }
1914 }
1915
1916 return NULL;
1917 }
1918
1919 void* os::dll_lookup(void* handle, const char* name) {
1920 return dlsym(handle, name);
1921 }
1922
1923 void* os::get_default_process_handle() {
1924 return (void*)::dlopen(NULL, RTLD_LAZY);
1925 }
1926
1927 int os::stat(const char *path, struct stat *sbuf) {
1928 char pathbuf[MAX_PATH];
1929 if (strlen(path) > MAX_PATH - 1) {
1930 errno = ENAMETOOLONG;
1931 return -1;
1932 }
1933 os::native_path(strcpy(pathbuf, path));
1934 return ::stat(pathbuf, sbuf);
1935 }
1936
1937 static bool _print_ascii_file(const char* filename, outputStream* st) {
1938 int fd = ::open(filename, O_RDONLY);
1939 if (fd == -1) {
1940 return false;
1941 }
1942
1943 char buf[32];
1944 int bytes;
1945 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
1946 st->print_raw(buf, bytes);
1947 }
1948
1949 ::close(fd);
1950
1951 return true;
1952 }
1953
1954 void os::print_os_info_brief(outputStream* st) {
1955 os::Solaris::print_distro_info(st);
1956
1957 os::Posix::print_uname_info(st);
1958
1959 os::Solaris::print_libversion_info(st);
1960 }
1961
1962 void os::print_os_info(outputStream* st) {
1963 st->print("OS:");
1964
1965 os::Solaris::print_distro_info(st);
1966
1967 os::Posix::print_uname_info(st);
1968
1969 os::Solaris::print_libversion_info(st);
1970
1971 os::Posix::print_rlimit_info(st);
1972
1973 os::Posix::print_load_average(st);
1974 }
1975
1976 void os::Solaris::print_distro_info(outputStream* st) {
1977 if (!_print_ascii_file("/etc/release", st)) {
1978 st->print("Solaris");
1979 }
1980 st->cr();
1981 }
1982
1983 void os::Solaris::print_libversion_info(outputStream* st) {
1984 st->print(" (T2 libthread)");
1985 st->cr();
1986 }
1987
1988 static bool check_addr0(outputStream* st) {
1989 jboolean status = false;
1990 int fd = ::open("/proc/self/map",O_RDONLY);
1991 if (fd >= 0) {
1992 prmap_t p;
1993 while (::read(fd, &p, sizeof(p)) > 0) {
1994 if (p.pr_vaddr == 0x0) {
1995 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
1996 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
1997 st->print("Access:");
1998 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
1999 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
2000 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
2001 st->cr();
2002 status = true;
2003 }
2004 }
2005 ::close(fd);
2006 }
2007 return status;
2008 }
2009
2010 void os::pd_print_cpu_info(outputStream* st) {
2011 // Nothing to do for now.
2012 }
2013
2014 void os::print_memory_info(outputStream* st) {
2015 st->print("Memory:");
2016 st->print(" %dk page", os::vm_page_size()>>10);
2017 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2018 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2019 st->cr();
2020 (void) check_addr0(st);
2021 }
2022
2023 void os::print_siginfo(outputStream* st, void* siginfo) {
2024 const siginfo_t* si = (const siginfo_t*)siginfo;
2025
2026 os::Posix::print_siginfo_brief(st, si);
2027
2028 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2029 UseSharedSpaces) {
2030 FileMapInfo* mapinfo = FileMapInfo::current_info();
2031 if (mapinfo->is_in_shared_space(si->si_addr)) {
2032 st->print("\n\nError accessing class data sharing archive." \
2033 " Mapped file inaccessible during execution, " \
2034 " possible disk/network problem.");
2035 }
2036 }
2037 st->cr();
2038 }
2039
2040 // Moved from whole group, because we need them here for diagnostic
2041 // prints.
2042 #define OLDMAXSIGNUM 32
2043 static int Maxsignum = 0;
2044 static int *ourSigFlags = NULL;
2045
2046 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2047
2048 int os::Solaris::get_our_sigflags(int sig) {
2049 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2050 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2051 return ourSigFlags[sig];
2052 }
2053
2054 void os::Solaris::set_our_sigflags(int sig, int flags) {
2055 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2056 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2057 ourSigFlags[sig] = flags;
2058 }
2059
2060
2061 static const char* get_signal_handler_name(address handler,
2062 char* buf, int buflen) {
2063 int offset;
2064 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2065 if (found) {
2066 // skip directory names
2067 const char *p1, *p2;
2068 p1 = buf;
2069 size_t len = strlen(os::file_separator());
2070 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2071 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2072 } else {
2073 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2074 }
2075 return buf;
2076 }
2077
2078 static void print_signal_handler(outputStream* st, int sig,
2079 char* buf, size_t buflen) {
2080 struct sigaction sa;
2081
2082 sigaction(sig, NULL, &sa);
2083
2084 st->print("%s: ", os::exception_name(sig, buf, buflen));
2085
2086 address handler = (sa.sa_flags & SA_SIGINFO)
2087 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2088 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2089
2090 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2091 st->print("SIG_DFL");
2092 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2093 st->print("SIG_IGN");
2094 } else {
2095 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2096 }
2097
2098 st->print(", sa_mask[0]=");
2099 os::Posix::print_signal_set_short(st, &sa.sa_mask);
2100
2101 address rh = VMError::get_resetted_sighandler(sig);
2102 // May be, handler was resetted by VMError?
2103 if (rh != NULL) {
2104 handler = rh;
2105 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2106 }
2107
2108 st->print(", sa_flags=");
2109 os::Posix::print_sa_flags(st, sa.sa_flags);
2110
2111 // Check: is it our handler?
2112 if (handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2113 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2114 // It is our signal handler
2115 // check for flags
2116 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2117 st->print(
2118 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2119 os::Solaris::get_our_sigflags(sig));
2120 }
2121 }
2122 st->cr();
2123 }
2124
2125 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2126 st->print_cr("Signal Handlers:");
2127 print_signal_handler(st, SIGSEGV, buf, buflen);
2128 print_signal_handler(st, SIGBUS , buf, buflen);
2129 print_signal_handler(st, SIGFPE , buf, buflen);
2130 print_signal_handler(st, SIGPIPE, buf, buflen);
2131 print_signal_handler(st, SIGXFSZ, buf, buflen);
2132 print_signal_handler(st, SIGILL , buf, buflen);
2133 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2134 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2135 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2136 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2137 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2138 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2139 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2140 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2141 }
2142
2143 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2144
2145 // Find the full path to the current module, libjvm.so
2146 void os::jvm_path(char *buf, jint buflen) {
2147 // Error checking.
2148 if (buflen < MAXPATHLEN) {
2149 assert(false, "must use a large-enough buffer");
2150 buf[0] = '\0';
2151 return;
2152 }
2153 // Lazy resolve the path to current module.
2154 if (saved_jvm_path[0] != 0) {
2155 strcpy(buf, saved_jvm_path);
2156 return;
2157 }
2158
2159 Dl_info dlinfo;
2160 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2161 assert(ret != 0, "cannot locate libjvm");
2162 if (ret != 0 && dlinfo.dli_fname != NULL) {
2163 realpath((char *)dlinfo.dli_fname, buf);
2164 } else {
2165 buf[0] = '\0';
2166 return;
2167 }
2168
2169 if (Arguments::sun_java_launcher_is_altjvm()) {
2170 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical
2171 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".
2172 // If "/jre/lib/" appears at the right place in the string, then
2173 // assume we are installed in a JDK and we're done. Otherwise, check
2174 // for a JAVA_HOME environment variable and fix up the path so it
2175 // looks like libjvm.so is installed there (append a fake suffix
2176 // hotspot/libjvm.so).
2177 const char *p = buf + strlen(buf) - 1;
2178 for (int count = 0; p > buf && count < 5; ++count) {
2179 for (--p; p > buf && *p != '/'; --p)
2180 /* empty */ ;
2181 }
2182
2183 if (strncmp(p, "/jre/lib/", 9) != 0) {
2184 // Look for JAVA_HOME in the environment.
2185 char* java_home_var = ::getenv("JAVA_HOME");
2186 if (java_home_var != NULL && java_home_var[0] != 0) {
2187 char cpu_arch[12];
2188 char* jrelib_p;
2189 int len;
2190 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2191 #ifdef _LP64
2192 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2193 if (strcmp(cpu_arch, "sparc") == 0) {
2194 strcat(cpu_arch, "v9");
2195 } else if (strcmp(cpu_arch, "i386") == 0) {
2196 strcpy(cpu_arch, "amd64");
2197 }
2198 #endif
2199 // Check the current module name "libjvm.so".
2200 p = strrchr(buf, '/');
2201 assert(strstr(p, "/libjvm") == p, "invalid library name");
2202
2203 realpath(java_home_var, buf);
2204 // determine if this is a legacy image or modules image
2205 // modules image doesn't have "jre" subdirectory
2206 len = strlen(buf);
2207 assert(len < buflen, "Ran out of buffer space");
2208 jrelib_p = buf + len;
2209 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2210 if (0 != access(buf, F_OK)) {
2211 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2212 }
2213
2214 if (0 == access(buf, F_OK)) {
2215 // Use current module name "libjvm.so"
2216 len = strlen(buf);
2217 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
2218 } else {
2219 // Go back to path of .so
2220 realpath((char *)dlinfo.dli_fname, buf);
2221 }
2222 }
2223 }
2224 }
2225
2226 strncpy(saved_jvm_path, buf, MAXPATHLEN);
2227 saved_jvm_path[MAXPATHLEN - 1] = '\0';
2228 }
2229
2230
2231 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2232 // no prefix required, not even "_"
2233 }
2234
2235
2236 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2237 // no suffix required
2238 }
2239
2240 // This method is a copy of JDK's sysGetLastErrorString
2241 // from src/solaris/hpi/src/system_md.c
2242
2243 size_t os::lasterror(char *buf, size_t len) {
2244 if (errno == 0) return 0;
2245
2246 const char *s = ::strerror(errno);
2247 size_t n = ::strlen(s);
2248 if (n >= len) {
2249 n = len - 1;
2250 }
2251 ::strncpy(buf, s, n);
2252 buf[n] = '\0';
2253 return n;
2254 }
2255
2256
2257 // sun.misc.Signal
2258
2259 extern "C" {
2260 static void UserHandler(int sig, void *siginfo, void *context) {
2261 // Ctrl-C is pressed during error reporting, likely because the error
2262 // handler fails to abort. Let VM die immediately.
2263 if (sig == SIGINT && is_error_reported()) {
2264 os::die();
2265 }
2266
2267 os::signal_notify(sig);
2268 // We do not need to reinstate the signal handler each time...
2269 }
2270 }
2271
2272 void* os::user_handler() {
2273 return CAST_FROM_FN_PTR(void*, UserHandler);
2274 }
2275
2276 class Semaphore : public StackObj {
2277 public:
2278 Semaphore();
2279 ~Semaphore();
2280 void signal();
2281 void wait();
2282 bool trywait();
2283 bool timedwait(unsigned int sec, int nsec);
2284 private:
2285 sema_t _semaphore;
2286 };
2287
2288
2289 Semaphore::Semaphore() {
2290 sema_init(&_semaphore, 0, NULL, NULL);
2291 }
2292
2293 Semaphore::~Semaphore() {
2294 sema_destroy(&_semaphore);
2295 }
2296
2297 void Semaphore::signal() {
2298 sema_post(&_semaphore);
2299 }
2300
2301 void Semaphore::wait() {
2302 sema_wait(&_semaphore);
2303 }
2304
2305 bool Semaphore::trywait() {
2306 return sema_trywait(&_semaphore) == 0;
2307 }
2308
2309 bool Semaphore::timedwait(unsigned int sec, int nsec) {
2310 struct timespec ts;
2311 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec);
2312
2313 while (1) {
2314 int result = sema_timedwait(&_semaphore, &ts);
2315 if (result == 0) {
2316 return true;
2317 } else if (errno == EINTR) {
2318 continue;
2319 } else if (errno == ETIME) {
2320 return false;
2321 } else {
2322 return false;
2323 }
2324 }
2325 }
2326
2327 extern "C" {
2328 typedef void (*sa_handler_t)(int);
2329 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2330 }
2331
2332 void* os::signal(int signal_number, void* handler) {
2333 struct sigaction sigAct, oldSigAct;
2334 sigfillset(&(sigAct.sa_mask));
2335 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2336 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2337
2338 if (sigaction(signal_number, &sigAct, &oldSigAct)) {
2339 // -1 means registration failed
2340 return (void *)-1;
2341 }
2342
2343 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2344 }
2345
2346 void os::signal_raise(int signal_number) {
2347 raise(signal_number);
2348 }
2349
2350 // The following code is moved from os.cpp for making this
2351 // code platform specific, which it is by its very nature.
2352
2353 // a counter for each possible signal value
2354 static int Sigexit = 0;
2355 static int Maxlibjsigsigs;
2356 static jint *pending_signals = NULL;
2357 static int *preinstalled_sigs = NULL;
2358 static struct sigaction *chainedsigactions = NULL;
2359 static sema_t sig_sem;
2360 typedef int (*version_getting_t)();
2361 version_getting_t os::Solaris::get_libjsig_version = NULL;
2362 static int libjsigversion = NULL;
2363
2364 int os::sigexitnum_pd() {
2365 assert(Sigexit > 0, "signal memory not yet initialized");
2366 return Sigexit;
2367 }
2368
2369 void os::Solaris::init_signal_mem() {
2370 // Initialize signal structures
2371 Maxsignum = SIGRTMAX;
2372 Sigexit = Maxsignum+1;
2373 assert(Maxsignum >0, "Unable to obtain max signal number");
2374
2375 Maxlibjsigsigs = Maxsignum;
2376
2377 // pending_signals has one int per signal
2378 // The additional signal is for SIGEXIT - exit signal to signal_thread
2379 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2380 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2381
2382 if (UseSignalChaining) {
2383 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2384 * (Maxsignum + 1), mtInternal);
2385 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2386 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2387 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2388 }
2389 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2390 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2391 }
2392
2393 void os::signal_init_pd() {
2394 int ret;
2395
2396 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2397 assert(ret == 0, "sema_init() failed");
2398 }
2399
2400 void os::signal_notify(int signal_number) {
2401 int ret;
2402
2403 Atomic::inc(&pending_signals[signal_number]);
2404 ret = ::sema_post(&sig_sem);
2405 assert(ret == 0, "sema_post() failed");
2406 }
2407
2408 static int check_pending_signals(bool wait_for_signal) {
2409 int ret;
2410 while (true) {
2411 for (int i = 0; i < Sigexit + 1; i++) {
2412 jint n = pending_signals[i];
2413 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2414 return i;
2415 }
2416 }
2417 if (!wait_for_signal) {
2418 return -1;
2419 }
2420 JavaThread *thread = JavaThread::current();
2421 ThreadBlockInVM tbivm(thread);
2422
2423 bool threadIsSuspended;
2424 do {
2425 thread->set_suspend_equivalent();
2426 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2427 while ((ret = ::sema_wait(&sig_sem)) == EINTR)
2428 ;
2429 assert(ret == 0, "sema_wait() failed");
2430
2431 // were we externally suspended while we were waiting?
2432 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2433 if (threadIsSuspended) {
2434 // The semaphore has been incremented, but while we were waiting
2435 // another thread suspended us. We don't want to continue running
2436 // while suspended because that would surprise the thread that
2437 // suspended us.
2438 ret = ::sema_post(&sig_sem);
2439 assert(ret == 0, "sema_post() failed");
2440
2441 thread->java_suspend_self();
2442 }
2443 } while (threadIsSuspended);
2444 }
2445 }
2446
2447 int os::signal_lookup() {
2448 return check_pending_signals(false);
2449 }
2450
2451 int os::signal_wait() {
2452 return check_pending_signals(true);
2453 }
2454
2455 ////////////////////////////////////////////////////////////////////////////////
2456 // Virtual Memory
2457
2458 static int page_size = -1;
2459
2460 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2461 // clear this var if support is not available.
2462 static bool has_map_align = true;
2463
2464 int os::vm_page_size() {
2465 assert(page_size != -1, "must call os::init");
2466 return page_size;
2467 }
2468
2469 // Solaris allocates memory by pages.
2470 int os::vm_allocation_granularity() {
2471 assert(page_size != -1, "must call os::init");
2472 return page_size;
2473 }
2474
2475 static bool recoverable_mmap_error(int err) {
2476 // See if the error is one we can let the caller handle. This
2477 // list of errno values comes from the Solaris mmap(2) man page.
2478 switch (err) {
2479 case EBADF:
2480 case EINVAL:
2481 case ENOTSUP:
2482 // let the caller deal with these errors
2483 return true;
2484
2485 default:
2486 // Any remaining errors on this OS can cause our reserved mapping
2487 // to be lost. That can cause confusion where different data
2488 // structures think they have the same memory mapped. The worst
2489 // scenario is if both the VM and a library think they have the
2490 // same memory mapped.
2491 return false;
2492 }
2493 }
2494
2495 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec,
2496 int err) {
2497 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2498 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec,
2499 strerror(err), err);
2500 }
2501
2502 static void warn_fail_commit_memory(char* addr, size_t bytes,
2503 size_t alignment_hint, bool exec,
2504 int err) {
2505 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2506 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes,
2507 alignment_hint, exec, strerror(err), err);
2508 }
2509
2510 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) {
2511 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2512 size_t size = bytes;
2513 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2514 if (res != NULL) {
2515 if (UseNUMAInterleaving) {
2516 numa_make_global(addr, bytes);
2517 }
2518 return 0;
2519 }
2520
2521 int err = errno; // save errno from mmap() call in mmap_chunk()
2522
2523 if (!recoverable_mmap_error(err)) {
2524 warn_fail_commit_memory(addr, bytes, exec, err);
2525 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory.");
2526 }
2527
2528 return err;
2529 }
2530
2531 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2532 return Solaris::commit_memory_impl(addr, bytes, exec) == 0;
2533 }
2534
2535 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec,
2536 const char* mesg) {
2537 assert(mesg != NULL, "mesg must be specified");
2538 int err = os::Solaris::commit_memory_impl(addr, bytes, exec);
2539 if (err != 0) {
2540 // the caller wants all commit errors to exit with the specified mesg:
2541 warn_fail_commit_memory(addr, bytes, exec, err);
2542 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2543 }
2544 }
2545
2546 size_t os::Solaris::page_size_for_alignment(size_t alignment) {
2547 assert(is_size_aligned(alignment, (size_t) vm_page_size()),
2548 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT,
2549 alignment, (size_t) vm_page_size()));
2550
2551 for (int i = 0; _page_sizes[i] != 0; i++) {
2552 if (is_size_aligned(alignment, _page_sizes[i])) {
2553 return _page_sizes[i];
2554 }
2555 }
2556
2557 return (size_t) vm_page_size();
2558 }
2559
2560 int os::Solaris::commit_memory_impl(char* addr, size_t bytes,
2561 size_t alignment_hint, bool exec) {
2562 int err = Solaris::commit_memory_impl(addr, bytes, exec);
2563 if (err == 0 && UseLargePages && alignment_hint > 0) {
2564 assert(is_size_aligned(bytes, alignment_hint),
2565 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint));
2566
2567 // The syscall memcntl requires an exact page size (see man memcntl for details).
2568 size_t page_size = page_size_for_alignment(alignment_hint);
2569 if (page_size > (size_t) vm_page_size()) {
2570 (void)Solaris::setup_large_pages(addr, bytes, page_size);
2571 }
2572 }
2573 return err;
2574 }
2575
2576 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2577 bool exec) {
2578 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0;
2579 }
2580
2581 void os::pd_commit_memory_or_exit(char* addr, size_t bytes,
2582 size_t alignment_hint, bool exec,
2583 const char* mesg) {
2584 assert(mesg != NULL, "mesg must be specified");
2585 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec);
2586 if (err != 0) {
2587 // the caller wants all commit errors to exit with the specified mesg:
2588 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err);
2589 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg);
2590 }
2591 }
2592
2593 // Uncommit the pages in a specified region.
2594 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2595 if (madvise(addr, bytes, MADV_FREE) < 0) {
2596 debug_only(warning("MADV_FREE failed."));
2597 return;
2598 }
2599 }
2600
2601 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2602 return os::commit_memory(addr, size, !ExecMem);
2603 }
2604
2605 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2606 return os::uncommit_memory(addr, size);
2607 }
2608
2609 // Change the page size in a given range.
2610 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2611 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2612 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2613 if (UseLargePages) {
2614 size_t page_size = Solaris::page_size_for_alignment(alignment_hint);
2615 if (page_size > (size_t) vm_page_size()) {
2616 Solaris::setup_large_pages(addr, bytes, page_size);
2617 }
2618 }
2619 }
2620
2621 // Tell the OS to make the range local to the first-touching LWP
2622 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2623 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2624 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2625 debug_only(warning("MADV_ACCESS_LWP failed."));
2626 }
2627 }
2628
2629 // Tell the OS that this range would be accessed from different LWPs.
2630 void os::numa_make_global(char *addr, size_t bytes) {
2631 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2632 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2633 debug_only(warning("MADV_ACCESS_MANY failed."));
2634 }
2635 }
2636
2637 // Get the number of the locality groups.
2638 size_t os::numa_get_groups_num() {
2639 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2640 return n != -1 ? n : 1;
2641 }
2642
2643 // Get a list of leaf locality groups. A leaf lgroup is group that
2644 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2645 // board. An LWP is assigned to one of these groups upon creation.
2646 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2647 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2648 ids[0] = 0;
2649 return 1;
2650 }
2651 int result_size = 0, top = 1, bottom = 0, cur = 0;
2652 for (int k = 0; k < size; k++) {
2653 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2654 (Solaris::lgrp_id_t*)&ids[top], size - top);
2655 if (r == -1) {
2656 ids[0] = 0;
2657 return 1;
2658 }
2659 if (!r) {
2660 // That's a leaf node.
2661 assert(bottom <= cur, "Sanity check");
2662 // Check if the node has memory
2663 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2664 NULL, 0, LGRP_RSRC_MEM) > 0) {
2665 ids[bottom++] = ids[cur];
2666 }
2667 }
2668 top += r;
2669 cur++;
2670 }
2671 if (bottom == 0) {
2672 // Handle a situation, when the OS reports no memory available.
2673 // Assume UMA architecture.
2674 ids[0] = 0;
2675 return 1;
2676 }
2677 return bottom;
2678 }
2679
2680 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2681 bool os::numa_topology_changed() {
2682 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2683 if (is_stale != -1 && is_stale) {
2684 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2685 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2686 assert(c != 0, "Failure to initialize LGRP API");
2687 Solaris::set_lgrp_cookie(c);
2688 return true;
2689 }
2690 return false;
2691 }
2692
2693 // Get the group id of the current LWP.
2694 int os::numa_get_group_id() {
2695 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2696 if (lgrp_id == -1) {
2697 return 0;
2698 }
2699 const int size = os::numa_get_groups_num();
2700 int *ids = (int*)alloca(size * sizeof(int));
2701
2702 // Get the ids of all lgroups with memory; r is the count.
2703 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2704 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2705 if (r <= 0) {
2706 return 0;
2707 }
2708 return ids[os::random() % r];
2709 }
2710
2711 // Request information about the page.
2712 bool os::get_page_info(char *start, page_info* info) {
2713 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2714 uint64_t addr = (uintptr_t)start;
2715 uint64_t outdata[2];
2716 uint_t validity = 0;
2717
2718 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2719 return false;
2720 }
2721
2722 info->size = 0;
2723 info->lgrp_id = -1;
2724
2725 if ((validity & 1) != 0) {
2726 if ((validity & 2) != 0) {
2727 info->lgrp_id = outdata[0];
2728 }
2729 if ((validity & 4) != 0) {
2730 info->size = outdata[1];
2731 }
2732 return true;
2733 }
2734 return false;
2735 }
2736
2737 // Scan the pages from start to end until a page different than
2738 // the one described in the info parameter is encountered.
2739 char *os::scan_pages(char *start, char* end, page_info* page_expected,
2740 page_info* page_found) {
2741 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2742 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2743 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1];
2744 uint_t validity[MAX_MEMINFO_CNT];
2745
2746 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2747 uint64_t p = (uint64_t)start;
2748 while (p < (uint64_t)end) {
2749 addrs[0] = p;
2750 size_t addrs_count = 1;
2751 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2752 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2753 addrs_count++;
2754 }
2755
2756 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2757 return NULL;
2758 }
2759
2760 size_t i = 0;
2761 for (; i < addrs_count; i++) {
2762 if ((validity[i] & 1) != 0) {
2763 if ((validity[i] & 4) != 0) {
2764 if (outdata[types * i + 1] != page_expected->size) {
2765 break;
2766 }
2767 } else if (page_expected->size != 0) {
2768 break;
2769 }
2770
2771 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2772 if (outdata[types * i] != page_expected->lgrp_id) {
2773 break;
2774 }
2775 }
2776 } else {
2777 return NULL;
2778 }
2779 }
2780
2781 if (i < addrs_count) {
2782 if ((validity[i] & 2) != 0) {
2783 page_found->lgrp_id = outdata[types * i];
2784 } else {
2785 page_found->lgrp_id = -1;
2786 }
2787 if ((validity[i] & 4) != 0) {
2788 page_found->size = outdata[types * i + 1];
2789 } else {
2790 page_found->size = 0;
2791 }
2792 return (char*)addrs[i];
2793 }
2794
2795 p = addrs[addrs_count - 1] + page_size;
2796 }
2797 return end;
2798 }
2799
2800 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2801 size_t size = bytes;
2802 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2803 // uncommitted page. Otherwise, the read/write might succeed if we
2804 // have enough swap space to back the physical page.
2805 return
2806 NULL != Solaris::mmap_chunk(addr, size,
2807 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2808 PROT_NONE);
2809 }
2810
2811 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2812 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2813
2814 if (b == MAP_FAILED) {
2815 return NULL;
2816 }
2817 return b;
2818 }
2819
2820 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes,
2821 size_t alignment_hint, bool fixed) {
2822 char* addr = requested_addr;
2823 int flags = MAP_PRIVATE | MAP_NORESERVE;
2824
2825 assert(!(fixed && (alignment_hint > 0)),
2826 "alignment hint meaningless with fixed mmap");
2827
2828 if (fixed) {
2829 flags |= MAP_FIXED;
2830 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
2831 flags |= MAP_ALIGN;
2832 addr = (char*) alignment_hint;
2833 }
2834
2835 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2836 // uncommitted page. Otherwise, the read/write might succeed if we
2837 // have enough swap space to back the physical page.
2838 return mmap_chunk(addr, bytes, flags, PROT_NONE);
2839 }
2840
2841 char* os::pd_reserve_memory(size_t bytes, char* requested_addr,
2842 size_t alignment_hint) {
2843 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint,
2844 (requested_addr != NULL));
2845
2846 guarantee(requested_addr == NULL || requested_addr == addr,
2847 "OS failed to return requested mmap address.");
2848 return addr;
2849 }
2850
2851 // Reserve memory at an arbitrary address, only if that area is
2852 // available (and not reserved for something else).
2853
2854 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2855 const int max_tries = 10;
2856 char* base[max_tries];
2857 size_t size[max_tries];
2858
2859 // Solaris adds a gap between mmap'ed regions. The size of the gap
2860 // is dependent on the requested size and the MMU. Our initial gap
2861 // value here is just a guess and will be corrected later.
2862 bool had_top_overlap = false;
2863 bool have_adjusted_gap = false;
2864 size_t gap = 0x400000;
2865
2866 // Assert only that the size is a multiple of the page size, since
2867 // that's all that mmap requires, and since that's all we really know
2868 // about at this low abstraction level. If we need higher alignment,
2869 // we can either pass an alignment to this method or verify alignment
2870 // in one of the methods further up the call chain. See bug 5044738.
2871 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
2872
2873 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
2874 // Give it a try, if the kernel honors the hint we can return immediately.
2875 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
2876
2877 volatile int err = errno;
2878 if (addr == requested_addr) {
2879 return addr;
2880 } else if (addr != NULL) {
2881 pd_unmap_memory(addr, bytes);
2882 }
2883
2884 if (PrintMiscellaneous && Verbose) {
2885 char buf[256];
2886 buf[0] = '\0';
2887 if (addr == NULL) {
2888 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
2889 }
2890 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
2891 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
2892 "%s", bytes, requested_addr, addr, buf);
2893 }
2894
2895 // Address hint method didn't work. Fall back to the old method.
2896 // In theory, once SNV becomes our oldest supported platform, this
2897 // code will no longer be needed.
2898 //
2899 // Repeatedly allocate blocks until the block is allocated at the
2900 // right spot. Give up after max_tries.
2901 int i;
2902 for (i = 0; i < max_tries; ++i) {
2903 base[i] = reserve_memory(bytes);
2904
2905 if (base[i] != NULL) {
2906 // Is this the block we wanted?
2907 if (base[i] == requested_addr) {
2908 size[i] = bytes;
2909 break;
2910 }
2911
2912 // check that the gap value is right
2913 if (had_top_overlap && !have_adjusted_gap) {
2914 size_t actual_gap = base[i-1] - base[i] - bytes;
2915 if (gap != actual_gap) {
2916 // adjust the gap value and retry the last 2 allocations
2917 assert(i > 0, "gap adjustment code problem");
2918 have_adjusted_gap = true; // adjust the gap only once, just in case
2919 gap = actual_gap;
2920 if (PrintMiscellaneous && Verbose) {
2921 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
2922 }
2923 unmap_memory(base[i], bytes);
2924 unmap_memory(base[i-1], size[i-1]);
2925 i-=2;
2926 continue;
2927 }
2928 }
2929
2930 // Does this overlap the block we wanted? Give back the overlapped
2931 // parts and try again.
2932 //
2933 // There is still a bug in this code: if top_overlap == bytes,
2934 // the overlap is offset from requested region by the value of gap.
2935 // In this case giving back the overlapped part will not work,
2936 // because we'll give back the entire block at base[i] and
2937 // therefore the subsequent allocation will not generate a new gap.
2938 // This could be fixed with a new algorithm that used larger
2939 // or variable size chunks to find the requested region -
2940 // but such a change would introduce additional complications.
2941 // It's rare enough that the planets align for this bug,
2942 // so we'll just wait for a fix for 6204603/5003415 which
2943 // will provide a mmap flag to allow us to avoid this business.
2944
2945 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
2946 if (top_overlap >= 0 && top_overlap < bytes) {
2947 had_top_overlap = true;
2948 unmap_memory(base[i], top_overlap);
2949 base[i] += top_overlap;
2950 size[i] = bytes - top_overlap;
2951 } else {
2952 size_t bottom_overlap = base[i] + bytes - requested_addr;
2953 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
2954 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
2955 warning("attempt_reserve_memory_at: possible alignment bug");
2956 }
2957 unmap_memory(requested_addr, bottom_overlap);
2958 size[i] = bytes - bottom_overlap;
2959 } else {
2960 size[i] = bytes;
2961 }
2962 }
2963 }
2964 }
2965
2966 // Give back the unused reserved pieces.
2967
2968 for (int j = 0; j < i; ++j) {
2969 if (base[j] != NULL) {
2970 unmap_memory(base[j], size[j]);
2971 }
2972 }
2973
2974 return (i < max_tries) ? requested_addr : NULL;
2975 }
2976
2977 bool os::pd_release_memory(char* addr, size_t bytes) {
2978 size_t size = bytes;
2979 return munmap(addr, size) == 0;
2980 }
2981
2982 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
2983 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
2984 "addr must be page aligned");
2985 int retVal = mprotect(addr, bytes, prot);
2986 return retVal == 0;
2987 }
2988
2989 // Protect memory (Used to pass readonly pages through
2990 // JNI GetArray<type>Elements with empty arrays.)
2991 // Also, used for serialization page and for compressed oops null pointer
2992 // checking.
2993 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
2994 bool is_committed) {
2995 unsigned int p = 0;
2996 switch (prot) {
2997 case MEM_PROT_NONE: p = PROT_NONE; break;
2998 case MEM_PROT_READ: p = PROT_READ; break;
2999 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3000 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3001 default:
3002 ShouldNotReachHere();
3003 }
3004 // is_committed is unused.
3005 return solaris_mprotect(addr, bytes, p);
3006 }
3007
3008 // guard_memory and unguard_memory only happens within stack guard pages.
3009 // Since ISM pertains only to the heap, guard and unguard memory should not
3010 /// happen with an ISM region.
3011 bool os::guard_memory(char* addr, size_t bytes) {
3012 return solaris_mprotect(addr, bytes, PROT_NONE);
3013 }
3014
3015 bool os::unguard_memory(char* addr, size_t bytes) {
3016 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3017 }
3018
3019 // Large page support
3020 static size_t _large_page_size = 0;
3021
3022 // Insertion sort for small arrays (descending order).
3023 static void insertion_sort_descending(size_t* array, int len) {
3024 for (int i = 0; i < len; i++) {
3025 size_t val = array[i];
3026 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3027 size_t tmp = array[key];
3028 array[key] = array[key - 1];
3029 array[key - 1] = tmp;
3030 }
3031 }
3032 }
3033
3034 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) {
3035 const unsigned int usable_count = VM_Version::page_size_count();
3036 if (usable_count == 1) {
3037 return false;
3038 }
3039
3040 // Find the right getpagesizes interface. When solaris 11 is the minimum
3041 // build platform, getpagesizes() (without the '2') can be called directly.
3042 typedef int (*gps_t)(size_t[], int);
3043 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3044 if (gps_func == NULL) {
3045 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3046 if (gps_func == NULL) {
3047 if (warn) {
3048 warning("MPSS is not supported by the operating system.");
3049 }
3050 return false;
3051 }
3052 }
3053
3054 // Fill the array of page sizes.
3055 int n = (*gps_func)(_page_sizes, page_sizes_max);
3056 assert(n > 0, "Solaris bug?");
3057
3058 if (n == page_sizes_max) {
3059 // Add a sentinel value (necessary only if the array was completely filled
3060 // since it is static (zeroed at initialization)).
3061 _page_sizes[--n] = 0;
3062 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3063 }
3064 assert(_page_sizes[n] == 0, "missing sentinel");
3065 trace_page_sizes("available page sizes", _page_sizes, n);
3066
3067 if (n == 1) return false; // Only one page size available.
3068
3069 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3070 // select up to usable_count elements. First sort the array, find the first
3071 // acceptable value, then copy the usable sizes to the top of the array and
3072 // trim the rest. Make sure to include the default page size :-).
3073 //
3074 // A better policy could get rid of the 4M limit by taking the sizes of the
3075 // important VM memory regions (java heap and possibly the code cache) into
3076 // account.
3077 insertion_sort_descending(_page_sizes, n);
3078 const size_t size_limit =
3079 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3080 int beg;
3081 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */;
3082 const int end = MIN2((int)usable_count, n) - 1;
3083 for (int cur = 0; cur < end; ++cur, ++beg) {
3084 _page_sizes[cur] = _page_sizes[beg];
3085 }
3086 _page_sizes[end] = vm_page_size();
3087 _page_sizes[end + 1] = 0;
3088
3089 if (_page_sizes[end] > _page_sizes[end - 1]) {
3090 // Default page size is not the smallest; sort again.
3091 insertion_sort_descending(_page_sizes, end + 1);
3092 }
3093 *page_size = _page_sizes[0];
3094
3095 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3096 return true;
3097 }
3098
3099 void os::large_page_init() {
3100 if (UseLargePages) {
3101 // print a warning if any large page related flag is specified on command line
3102 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3103 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3104
3105 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3106 }
3107 }
3108
3109 bool os::Solaris::is_valid_page_size(size_t bytes) {
3110 for (int i = 0; _page_sizes[i] != 0; i++) {
3111 if (_page_sizes[i] == bytes) {
3112 return true;
3113 }
3114 }
3115 return false;
3116 }
3117
3118 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) {
3119 assert(is_valid_page_size(align), err_msg(SIZE_FORMAT " is not a valid page size", align));
3120 assert(is_ptr_aligned((void*) start, align),
3121 err_msg(PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align));
3122 assert(is_size_aligned(bytes, align),
3123 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align));
3124
3125 // Signal to OS that we want large pages for addresses
3126 // from addr, addr + bytes
3127 struct memcntl_mha mpss_struct;
3128 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3129 mpss_struct.mha_pagesize = align;
3130 mpss_struct.mha_flags = 0;
3131 // Upon successful completion, memcntl() returns 0
3132 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) {
3133 debug_only(warning("Attempt to use MPSS failed."));
3134 return false;
3135 }
3136 return true;
3137 }
3138
3139 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) {
3140 fatal("os::reserve_memory_special should not be called on Solaris.");
3141 return NULL;
3142 }
3143
3144 bool os::release_memory_special(char* base, size_t bytes) {
3145 fatal("os::release_memory_special should not be called on Solaris.");
3146 return false;
3147 }
3148
3149 size_t os::large_page_size() {
3150 return _large_page_size;
3151 }
3152
3153 // MPSS allows application to commit large page memory on demand; with ISM
3154 // the entire memory region must be allocated as shared memory.
3155 bool os::can_commit_large_page_memory() {
3156 return true;
3157 }
3158
3159 bool os::can_execute_large_page_memory() {
3160 return true;
3161 }
3162
3163 // Read calls from inside the vm need to perform state transitions
3164 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3165 size_t res;
3166 JavaThread* thread = (JavaThread*)Thread::current();
3167 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3168 ThreadBlockInVM tbiv(thread);
3169 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3170 return res;
3171 }
3172
3173 size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) {
3174 size_t res;
3175 JavaThread* thread = (JavaThread*)Thread::current();
3176 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
3177 ThreadBlockInVM tbiv(thread);
3178 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res);
3179 return res;
3180 }
3181
3182 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3183 size_t res;
3184 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
3185 "Assumed _thread_in_native");
3186 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
3187 return res;
3188 }
3189
3190 void os::naked_short_sleep(jlong ms) {
3191 assert(ms < 1000, "Un-interruptable sleep, short time use only");
3192
3193 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but
3194 // Solaris requires -lrt for this.
3195 usleep((ms * 1000));
3196
3197 return;
3198 }
3199
3200 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3201 void os::infinite_sleep() {
3202 while (true) { // sleep forever ...
3203 ::sleep(100); // ... 100 seconds at a time
3204 }
3205 }
3206
3207 // Used to convert frequent JVM_Yield() to nops
3208 bool os::dont_yield() {
3209 if (DontYieldALot) {
3210 static hrtime_t last_time = 0;
3211 hrtime_t diff = getTimeNanos() - last_time;
3212
3213 if (diff < DontYieldALotInterval * 1000000) {
3214 return true;
3215 }
3216
3217 last_time += diff;
3218
3219 return false;
3220 } else {
3221 return false;
3222 }
3223 }
3224
3225 // Note that yield semantics are defined by the scheduling class to which
3226 // the thread currently belongs. Typically, yield will _not yield to
3227 // other equal or higher priority threads that reside on the dispatch queues
3228 // of other CPUs.
3229
3230 void os::naked_yield() {
3231 thr_yield();
3232 }
3233
3234 // Interface for setting lwp priorities. If we are using T2 libthread,
3235 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3236 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3237 // function is meaningless in this mode so we must adjust the real lwp's priority
3238 // The routines below implement the getting and setting of lwp priorities.
3239 //
3240 // Note: T2 is now the only supported libthread. UseBoundThreads flag is
3241 // being deprecated and all threads are now BoundThreads
3242 //
3243 // Note: There are three priority scales used on Solaris. Java priotities
3244 // which range from 1 to 10, libthread "thr_setprio" scale which range
3245 // from 0 to 127, and the current scheduling class of the process we
3246 // are running in. This is typically from -60 to +60.
3247 // The setting of the lwp priorities in done after a call to thr_setprio
3248 // so Java priorities are mapped to libthread priorities and we map from
3249 // the latter to lwp priorities. We don't keep priorities stored in
3250 // Java priorities since some of our worker threads want to set priorities
3251 // higher than all Java threads.
3252 //
3253 // For related information:
3254 // (1) man -s 2 priocntl
3255 // (2) man -s 4 priocntl
3256 // (3) man dispadmin
3257 // = librt.so
3258 // = libthread/common/rtsched.c - thrp_setlwpprio().
3259 // = ps -cL <pid> ... to validate priority.
3260 // = sched_get_priority_min and _max
3261 // pthread_create
3262 // sched_setparam
3263 // pthread_setschedparam
3264 //
3265 // Assumptions:
3266 // + We assume that all threads in the process belong to the same
3267 // scheduling class. IE. an homogenous process.
3268 // + Must be root or in IA group to change change "interactive" attribute.
3269 // Priocntl() will fail silently. The only indication of failure is when
3270 // we read-back the value and notice that it hasn't changed.
3271 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3272 // + For RT, change timeslice as well. Invariant:
3273 // constant "priority integral"
3274 // Konst == TimeSlice * (60-Priority)
3275 // Given a priority, compute appropriate timeslice.
3276 // + Higher numerical values have higher priority.
3277
3278 // sched class attributes
3279 typedef struct {
3280 int schedPolicy; // classID
3281 int maxPrio;
3282 int minPrio;
3283 } SchedInfo;
3284
3285
3286 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3287
3288 #ifdef ASSERT
3289 static int ReadBackValidate = 1;
3290 #endif
3291 static int myClass = 0;
3292 static int myMin = 0;
3293 static int myMax = 0;
3294 static int myCur = 0;
3295 static bool priocntl_enable = false;
3296
3297 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3298 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3299
3300
3301 // lwp_priocntl_init
3302 //
3303 // Try to determine the priority scale for our process.
3304 //
3305 // Return errno or 0 if OK.
3306 //
3307 static int lwp_priocntl_init() {
3308 int rslt;
3309 pcinfo_t ClassInfo;
3310 pcparms_t ParmInfo;
3311 int i;
3312
3313 if (!UseThreadPriorities) return 0;
3314
3315 // If ThreadPriorityPolicy is 1, switch tables
3316 if (ThreadPriorityPolicy == 1) {
3317 for (i = 0; i < CriticalPriority+1; i++)
3318 os::java_to_os_priority[i] = prio_policy1[i];
3319 }
3320 if (UseCriticalJavaThreadPriority) {
3321 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3322 // See set_native_priority() and set_lwp_class_and_priority().
3323 // Save original MaxPriority mapping in case attempt to
3324 // use critical priority fails.
3325 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3326 // Set negative to distinguish from other priorities
3327 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3328 }
3329
3330 // Get IDs for a set of well-known scheduling classes.
3331 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3332 // the system. We should have a loop that iterates over the
3333 // classID values, which are known to be "small" integers.
3334
3335 strcpy(ClassInfo.pc_clname, "TS");
3336 ClassInfo.pc_cid = -1;
3337 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3338 if (rslt < 0) return errno;
3339 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3340 tsLimits.schedPolicy = ClassInfo.pc_cid;
3341 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3342 tsLimits.minPrio = -tsLimits.maxPrio;
3343
3344 strcpy(ClassInfo.pc_clname, "IA");
3345 ClassInfo.pc_cid = -1;
3346 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3347 if (rslt < 0) return errno;
3348 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3349 iaLimits.schedPolicy = ClassInfo.pc_cid;
3350 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3351 iaLimits.minPrio = -iaLimits.maxPrio;
3352
3353 strcpy(ClassInfo.pc_clname, "RT");
3354 ClassInfo.pc_cid = -1;
3355 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3356 if (rslt < 0) return errno;
3357 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3358 rtLimits.schedPolicy = ClassInfo.pc_cid;
3359 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3360 rtLimits.minPrio = 0;
3361
3362 strcpy(ClassInfo.pc_clname, "FX");
3363 ClassInfo.pc_cid = -1;
3364 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3365 if (rslt < 0) return errno;
3366 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3367 fxLimits.schedPolicy = ClassInfo.pc_cid;
3368 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3369 fxLimits.minPrio = 0;
3370
3371 // Query our "current" scheduling class.
3372 // This will normally be IA, TS or, rarely, FX or RT.
3373 memset(&ParmInfo, 0, sizeof(ParmInfo));
3374 ParmInfo.pc_cid = PC_CLNULL;
3375 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3376 if (rslt < 0) return errno;
3377 myClass = ParmInfo.pc_cid;
3378
3379 // We now know our scheduling classId, get specific information
3380 // about the class.
3381 ClassInfo.pc_cid = myClass;
3382 ClassInfo.pc_clname[0] = 0;
3383 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3384 if (rslt < 0) return errno;
3385
3386 if (ThreadPriorityVerbose) {
3387 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3388 }
3389
3390 memset(&ParmInfo, 0, sizeof(pcparms_t));
3391 ParmInfo.pc_cid = PC_CLNULL;
3392 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3393 if (rslt < 0) return errno;
3394
3395 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3396 myMin = rtLimits.minPrio;
3397 myMax = rtLimits.maxPrio;
3398 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3399 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3400 myMin = iaLimits.minPrio;
3401 myMax = iaLimits.maxPrio;
3402 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3403 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3404 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3405 myMin = tsLimits.minPrio;
3406 myMax = tsLimits.maxPrio;
3407 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3408 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3409 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3410 myMin = fxLimits.minPrio;
3411 myMax = fxLimits.maxPrio;
3412 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3413 } else {
3414 // No clue - punt
3415 if (ThreadPriorityVerbose) {
3416 tty->print_cr("Unknown scheduling class: %s ... \n",
3417 ClassInfo.pc_clname);
3418 }
3419 return EINVAL; // no clue, punt
3420 }
3421
3422 if (ThreadPriorityVerbose) {
3423 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax);
3424 }
3425
3426 priocntl_enable = true; // Enable changing priorities
3427 return 0;
3428 }
3429
3430 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3431 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3432 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3433 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3434
3435
3436 // scale_to_lwp_priority
3437 //
3438 // Convert from the libthread "thr_setprio" scale to our current
3439 // lwp scheduling class scale.
3440 //
3441 static int scale_to_lwp_priority(int rMin, int rMax, int x) {
3442 int v;
3443
3444 if (x == 127) return rMax; // avoid round-down
3445 v = (((x*(rMax-rMin)))/128)+rMin;
3446 return v;
3447 }
3448
3449
3450 // set_lwp_class_and_priority
3451 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3452 int newPrio, int new_class, bool scale) {
3453 int rslt;
3454 int Actual, Expected, prv;
3455 pcparms_t ParmInfo; // for GET-SET
3456 #ifdef ASSERT
3457 pcparms_t ReadBack; // for readback
3458 #endif
3459
3460 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3461 // Query current values.
3462 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3463 // Cache "pcparms_t" in global ParmCache.
3464 // TODO: elide set-to-same-value
3465
3466 // If something went wrong on init, don't change priorities.
3467 if (!priocntl_enable) {
3468 if (ThreadPriorityVerbose) {
3469 tty->print_cr("Trying to set priority but init failed, ignoring");
3470 }
3471 return EINVAL;
3472 }
3473
3474 // If lwp hasn't started yet, just return
3475 // the _start routine will call us again.
3476 if (lwpid <= 0) {
3477 if (ThreadPriorityVerbose) {
3478 tty->print_cr("deferring the set_lwp_class_and_priority of thread "
3479 INTPTR_FORMAT " to %d, lwpid not set",
3480 ThreadID, newPrio);
3481 }
3482 return 0;
3483 }
3484
3485 if (ThreadPriorityVerbose) {
3486 tty->print_cr ("set_lwp_class_and_priority("
3487 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3488 ThreadID, lwpid, newPrio);
3489 }
3490
3491 memset(&ParmInfo, 0, sizeof(pcparms_t));
3492 ParmInfo.pc_cid = PC_CLNULL;
3493 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3494 if (rslt < 0) return errno;
3495
3496 int cur_class = ParmInfo.pc_cid;
3497 ParmInfo.pc_cid = (id_t)new_class;
3498
3499 if (new_class == rtLimits.schedPolicy) {
3500 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3501 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3502 rtLimits.maxPrio, newPrio)
3503 : newPrio;
3504 rtInfo->rt_tqsecs = RT_NOCHANGE;
3505 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3506 if (ThreadPriorityVerbose) {
3507 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3508 }
3509 } else if (new_class == iaLimits.schedPolicy) {
3510 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3511 int maxClamped = MIN2(iaLimits.maxPrio,
3512 cur_class == new_class
3513 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3514 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3515 maxClamped, newPrio)
3516 : newPrio;
3517 iaInfo->ia_uprilim = cur_class == new_class
3518 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3519 iaInfo->ia_mode = IA_NOCHANGE;
3520 if (ThreadPriorityVerbose) {
3521 tty->print_cr("IA: [%d...%d] %d->%d\n",
3522 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3523 }
3524 } else if (new_class == tsLimits.schedPolicy) {
3525 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3526 int maxClamped = MIN2(tsLimits.maxPrio,
3527 cur_class == new_class
3528 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3529 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3530 maxClamped, newPrio)
3531 : newPrio;
3532 tsInfo->ts_uprilim = cur_class == new_class
3533 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3534 if (ThreadPriorityVerbose) {
3535 tty->print_cr("TS: [%d...%d] %d->%d\n",
3536 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3537 }
3538 } else if (new_class == fxLimits.schedPolicy) {
3539 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3540 int maxClamped = MIN2(fxLimits.maxPrio,
3541 cur_class == new_class
3542 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3543 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3544 maxClamped, newPrio)
3545 : newPrio;
3546 fxInfo->fx_uprilim = cur_class == new_class
3547 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
3548 fxInfo->fx_tqsecs = FX_NOCHANGE;
3549 fxInfo->fx_tqnsecs = FX_NOCHANGE;
3550 if (ThreadPriorityVerbose) {
3551 tty->print_cr("FX: [%d...%d] %d->%d\n",
3552 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
3553 }
3554 } else {
3555 if (ThreadPriorityVerbose) {
3556 tty->print_cr("Unknown new scheduling class %d\n", new_class);
3557 }
3558 return EINVAL; // no clue, punt
3559 }
3560
3561 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3562 if (ThreadPriorityVerbose && rslt) {
3563 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3564 }
3565 if (rslt < 0) return errno;
3566
3567 #ifdef ASSERT
3568 // Sanity check: read back what we just attempted to set.
3569 // In theory it could have changed in the interim ...
3570 //
3571 // The priocntl system call is tricky.
3572 // Sometimes it'll validate the priority value argument and
3573 // return EINVAL if unhappy. At other times it fails silently.
3574 // Readbacks are prudent.
3575
3576 if (!ReadBackValidate) return 0;
3577
3578 memset(&ReadBack, 0, sizeof(pcparms_t));
3579 ReadBack.pc_cid = PC_CLNULL;
3580 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3581 assert(rslt >= 0, "priocntl failed");
3582 Actual = Expected = 0xBAD;
3583 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3584 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3585 Actual = RTPRI(ReadBack)->rt_pri;
3586 Expected = RTPRI(ParmInfo)->rt_pri;
3587 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3588 Actual = IAPRI(ReadBack)->ia_upri;
3589 Expected = IAPRI(ParmInfo)->ia_upri;
3590 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3591 Actual = TSPRI(ReadBack)->ts_upri;
3592 Expected = TSPRI(ParmInfo)->ts_upri;
3593 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3594 Actual = FXPRI(ReadBack)->fx_upri;
3595 Expected = FXPRI(ParmInfo)->fx_upri;
3596 } else {
3597 if (ThreadPriorityVerbose) {
3598 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
3599 ParmInfo.pc_cid);
3600 }
3601 }
3602
3603 if (Actual != Expected) {
3604 if (ThreadPriorityVerbose) {
3605 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3606 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3607 }
3608 }
3609 #endif
3610
3611 return 0;
3612 }
3613
3614 // Solaris only gives access to 128 real priorities at a time,
3615 // so we expand Java's ten to fill this range. This would be better
3616 // if we dynamically adjusted relative priorities.
3617 //
3618 // The ThreadPriorityPolicy option allows us to select 2 different
3619 // priority scales.
3620 //
3621 // ThreadPriorityPolicy=0
3622 // Since the Solaris' default priority is MaximumPriority, we do not
3623 // set a priority lower than Max unless a priority lower than
3624 // NormPriority is requested.
3625 //
3626 // ThreadPriorityPolicy=1
3627 // This mode causes the priority table to get filled with
3628 // linear values. NormPriority get's mapped to 50% of the
3629 // Maximum priority an so on. This will cause VM threads
3630 // to get unfair treatment against other Solaris processes
3631 // which do not explicitly alter their thread priorities.
3632
3633 int os::java_to_os_priority[CriticalPriority + 1] = {
3634 -99999, // 0 Entry should never be used
3635
3636 0, // 1 MinPriority
3637 32, // 2
3638 64, // 3
3639
3640 96, // 4
3641 127, // 5 NormPriority
3642 127, // 6
3643
3644 127, // 7
3645 127, // 8
3646 127, // 9 NearMaxPriority
3647
3648 127, // 10 MaxPriority
3649
3650 -criticalPrio // 11 CriticalPriority
3651 };
3652
3653 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3654 OSThread* osthread = thread->osthread();
3655
3656 // Save requested priority in case the thread hasn't been started
3657 osthread->set_native_priority(newpri);
3658
3659 // Check for critical priority request
3660 bool fxcritical = false;
3661 if (newpri == -criticalPrio) {
3662 fxcritical = true;
3663 newpri = criticalPrio;
3664 }
3665
3666 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3667 if (!UseThreadPriorities) return OS_OK;
3668
3669 int status = 0;
3670
3671 if (!fxcritical) {
3672 // Use thr_setprio only if we have a priority that thr_setprio understands
3673 status = thr_setprio(thread->osthread()->thread_id(), newpri);
3674 }
3675
3676 int lwp_status =
3677 set_lwp_class_and_priority(osthread->thread_id(),
3678 osthread->lwp_id(),
3679 newpri,
3680 fxcritical ? fxLimits.schedPolicy : myClass,
3681 !fxcritical);
3682 if (lwp_status != 0 && fxcritical) {
3683 // Try again, this time without changing the scheduling class
3684 newpri = java_MaxPriority_to_os_priority;
3685 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
3686 osthread->lwp_id(),
3687 newpri, myClass, false);
3688 }
3689 status |= lwp_status;
3690 return (status == 0) ? OS_OK : OS_ERR;
3691 }
3692
3693
3694 OSReturn os::get_native_priority(const Thread* const thread,
3695 int *priority_ptr) {
3696 int p;
3697 if (!UseThreadPriorities) {
3698 *priority_ptr = NormalPriority;
3699 return OS_OK;
3700 }
3701 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3702 if (status != 0) {
3703 return OS_ERR;
3704 }
3705 *priority_ptr = p;
3706 return OS_OK;
3707 }
3708
3709
3710 // Hint to the underlying OS that a task switch would not be good.
3711 // Void return because it's a hint and can fail.
3712 void os::hint_no_preempt() {
3713 schedctl_start(schedctl_init());
3714 }
3715
3716 static void resume_clear_context(OSThread *osthread) {
3717 osthread->set_ucontext(NULL);
3718 }
3719
3720 static void suspend_save_context(OSThread *osthread, ucontext_t* context) {
3721 osthread->set_ucontext(context);
3722 }
3723
3724 static Semaphore sr_semaphore;
3725
3726 void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) {
3727 // Save and restore errno to avoid confusing native code with EINTR
3728 // after sigsuspend.
3729 int old_errno = errno;
3730
3731 OSThread* osthread = thread->osthread();
3732 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
3733
3734 os::SuspendResume::State current = osthread->sr.state();
3735 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
3736 suspend_save_context(osthread, uc);
3737
3738 // attempt to switch the state, we assume we had a SUSPEND_REQUEST
3739 os::SuspendResume::State state = osthread->sr.suspended();
3740 if (state == os::SuspendResume::SR_SUSPENDED) {
3741 sigset_t suspend_set; // signals for sigsuspend()
3742
3743 // get current set of blocked signals and unblock resume signal
3744 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set);
3745 sigdelset(&suspend_set, os::Solaris::SIGasync());
3746
3747 sr_semaphore.signal();
3748 // wait here until we are resumed
3749 while (1) {
3750 sigsuspend(&suspend_set);
3751
3752 os::SuspendResume::State result = osthread->sr.running();
3753 if (result == os::SuspendResume::SR_RUNNING) {
3754 sr_semaphore.signal();
3755 break;
3756 }
3757 }
3758
3759 } else if (state == os::SuspendResume::SR_RUNNING) {
3760 // request was cancelled, continue
3761 } else {
3762 ShouldNotReachHere();
3763 }
3764
3765 resume_clear_context(osthread);
3766 } else if (current == os::SuspendResume::SR_RUNNING) {
3767 // request was cancelled, continue
3768 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
3769 // ignore
3770 } else {
3771 // ignore
3772 }
3773
3774 errno = old_errno;
3775 }
3776
3777 void os::print_statistics() {
3778 }
3779
3780 int os::message_box(const char* title, const char* message) {
3781 int i;
3782 fdStream err(defaultStream::error_fd());
3783 for (i = 0; i < 78; i++) err.print_raw("=");
3784 err.cr();
3785 err.print_raw_cr(title);
3786 for (i = 0; i < 78; i++) err.print_raw("-");
3787 err.cr();
3788 err.print_raw_cr(message);
3789 for (i = 0; i < 78; i++) err.print_raw("=");
3790 err.cr();
3791
3792 char buf[16];
3793 // Prevent process from exiting upon "read error" without consuming all CPU
3794 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3795
3796 return buf[0] == 'y' || buf[0] == 'Y';
3797 }
3798
3799 static int sr_notify(OSThread* osthread) {
3800 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync());
3801 assert_status(status == 0, status, "thr_kill");
3802 return status;
3803 }
3804
3805 // "Randomly" selected value for how long we want to spin
3806 // before bailing out on suspending a thread, also how often
3807 // we send a signal to a thread we want to resume
3808 static const int RANDOMLY_LARGE_INTEGER = 1000000;
3809 static const int RANDOMLY_LARGE_INTEGER2 = 100;
3810
3811 static bool do_suspend(OSThread* osthread) {
3812 assert(osthread->sr.is_running(), "thread should be running");
3813 assert(!sr_semaphore.trywait(), "semaphore has invalid state");
3814
3815 // mark as suspended and send signal
3816 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
3817 // failed to switch, state wasn't running?
3818 ShouldNotReachHere();
3819 return false;
3820 }
3821
3822 if (sr_notify(osthread) != 0) {
3823 ShouldNotReachHere();
3824 }
3825
3826 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
3827 while (true) {
3828 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) {
3829 break;
3830 } else {
3831 // timeout
3832 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
3833 if (cancelled == os::SuspendResume::SR_RUNNING) {
3834 return false;
3835 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
3836 // make sure that we consume the signal on the semaphore as well
3837 sr_semaphore.wait();
3838 break;
3839 } else {
3840 ShouldNotReachHere();
3841 return false;
3842 }
3843 }
3844 }
3845
3846 guarantee(osthread->sr.is_suspended(), "Must be suspended");
3847 return true;
3848 }
3849
3850 static void do_resume(OSThread* osthread) {
3851 assert(osthread->sr.is_suspended(), "thread should be suspended");
3852 assert(!sr_semaphore.trywait(), "invalid semaphore state");
3853
3854 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
3855 // failed to switch to WAKEUP_REQUEST
3856 ShouldNotReachHere();
3857 return;
3858 }
3859
3860 while (true) {
3861 if (sr_notify(osthread) == 0) {
3862 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) {
3863 if (osthread->sr.is_running()) {
3864 return;
3865 }
3866 }
3867 } else {
3868 ShouldNotReachHere();
3869 }
3870 }
3871
3872 guarantee(osthread->sr.is_running(), "Must be running!");
3873 }
3874
3875 void os::SuspendedThreadTask::internal_do_task() {
3876 if (do_suspend(_thread->osthread())) {
3877 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
3878 do_task(context);
3879 do_resume(_thread->osthread());
3880 }
3881 }
3882
3883 class PcFetcher : public os::SuspendedThreadTask {
3884 public:
3885 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {}
3886 ExtendedPC result();
3887 protected:
3888 void do_task(const os::SuspendedThreadTaskContext& context);
3889 private:
3890 ExtendedPC _epc;
3891 };
3892
3893 ExtendedPC PcFetcher::result() {
3894 guarantee(is_done(), "task is not done yet.");
3895 return _epc;
3896 }
3897
3898 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) {
3899 Thread* thread = context.thread();
3900 OSThread* osthread = thread->osthread();
3901 if (osthread->ucontext() != NULL) {
3902 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext());
3903 } else {
3904 // NULL context is unexpected, double-check this is the VMThread
3905 guarantee(thread->is_VM_thread(), "can only be called for VMThread");
3906 }
3907 }
3908
3909 // A lightweight implementation that does not suspend the target thread and
3910 // thus returns only a hint. Used for profiling only!
3911 ExtendedPC os::get_thread_pc(Thread* thread) {
3912 // Make sure that it is called by the watcher and the Threads lock is owned.
3913 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
3914 // For now, is only used to profile the VM Thread
3915 assert(thread->is_VM_thread(), "Can only be called for VMThread");
3916 PcFetcher fetcher(thread);
3917 fetcher.run();
3918 return fetcher.result();
3919 }
3920
3921
3922 // This does not do anything on Solaris. This is basically a hook for being
3923 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
3924 void os::os_exception_wrapper(java_call_t f, JavaValue* value,
3925 methodHandle* method, JavaCallArguments* args,
3926 Thread* thread) {
3927 f(value, method, args, thread);
3928 }
3929
3930 // This routine may be used by user applications as a "hook" to catch signals.
3931 // The user-defined signal handler must pass unrecognized signals to this
3932 // routine, and if it returns true (non-zero), then the signal handler must
3933 // return immediately. If the flag "abort_if_unrecognized" is true, then this
3934 // routine will never retun false (zero), but instead will execute a VM panic
3935 // routine kill the process.
3936 //
3937 // If this routine returns false, it is OK to call it again. This allows
3938 // the user-defined signal handler to perform checks either before or after
3939 // the VM performs its own checks. Naturally, the user code would be making
3940 // a serious error if it tried to handle an exception (such as a null check
3941 // or breakpoint) that the VM was generating for its own correct operation.
3942 //
3943 // This routine may recognize any of the following kinds of signals:
3944 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
3945 // os::Solaris::SIGasync
3946 // It should be consulted by handlers for any of those signals.
3947 // It explicitly does not recognize os::Solaris::SIGinterrupt
3948 //
3949 // The caller of this routine must pass in the three arguments supplied
3950 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
3951 // field of the structure passed to sigaction(). This routine assumes that
3952 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
3953 //
3954 // Note that the VM will print warnings if it detects conflicting signal
3955 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
3956 //
3957 extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo,
3958 siginfo_t* siginfo,
3959 void* ucontext,
3960 int abort_if_unrecognized);
3961
3962
3963 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
3964 int orig_errno = errno; // Preserve errno value over signal handler.
3965 JVM_handle_solaris_signal(sig, info, ucVoid, true);
3966 errno = orig_errno;
3967 }
3968
3969 // Do not delete - if guarantee is ever removed, a signal handler (even empty)
3970 // is needed to provoke threads blocked on IO to return an EINTR
3971 // Note: this explicitly does NOT call JVM_handle_solaris_signal and
3972 // does NOT participate in signal chaining due to requirement for
3973 // NOT setting SA_RESTART to make EINTR work.
3974 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
3975 if (UseSignalChaining) {
3976 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
3977 if (actp && actp->sa_handler) {
3978 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
3979 }
3980 }
3981 }
3982
3983 // This boolean allows users to forward their own non-matching signals
3984 // to JVM_handle_solaris_signal, harmlessly.
3985 bool os::Solaris::signal_handlers_are_installed = false;
3986
3987 // For signal-chaining
3988 bool os::Solaris::libjsig_is_loaded = false;
3989 typedef struct sigaction *(*get_signal_t)(int);
3990 get_signal_t os::Solaris::get_signal_action = NULL;
3991
3992 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
3993 struct sigaction *actp = NULL;
3994
3995 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
3996 // Retrieve the old signal handler from libjsig
3997 actp = (*get_signal_action)(sig);
3998 }
3999 if (actp == NULL) {
4000 // Retrieve the preinstalled signal handler from jvm
4001 actp = get_preinstalled_handler(sig);
4002 }
4003
4004 return actp;
4005 }
4006
4007 static bool call_chained_handler(struct sigaction *actp, int sig,
4008 siginfo_t *siginfo, void *context) {
4009 // Call the old signal handler
4010 if (actp->sa_handler == SIG_DFL) {
4011 // It's more reasonable to let jvm treat it as an unexpected exception
4012 // instead of taking the default action.
4013 return false;
4014 } else if (actp->sa_handler != SIG_IGN) {
4015 if ((actp->sa_flags & SA_NODEFER) == 0) {
4016 // automaticlly block the signal
4017 sigaddset(&(actp->sa_mask), sig);
4018 }
4019
4020 sa_handler_t hand;
4021 sa_sigaction_t sa;
4022 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4023 // retrieve the chained handler
4024 if (siginfo_flag_set) {
4025 sa = actp->sa_sigaction;
4026 } else {
4027 hand = actp->sa_handler;
4028 }
4029
4030 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4031 actp->sa_handler = SIG_DFL;
4032 }
4033
4034 // try to honor the signal mask
4035 sigset_t oset;
4036 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4037
4038 // call into the chained handler
4039 if (siginfo_flag_set) {
4040 (*sa)(sig, siginfo, context);
4041 } else {
4042 (*hand)(sig);
4043 }
4044
4045 // restore the signal mask
4046 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4047 }
4048 // Tell jvm's signal handler the signal is taken care of.
4049 return true;
4050 }
4051
4052 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4053 bool chained = false;
4054 // signal-chaining
4055 if (UseSignalChaining) {
4056 struct sigaction *actp = get_chained_signal_action(sig);
4057 if (actp != NULL) {
4058 chained = call_chained_handler(actp, sig, siginfo, context);
4059 }
4060 }
4061 return chained;
4062 }
4063
4064 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4065 assert((chainedsigactions != (struct sigaction *)NULL) &&
4066 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4067 if (preinstalled_sigs[sig] != 0) {
4068 return &chainedsigactions[sig];
4069 }
4070 return NULL;
4071 }
4072
4073 void os::Solaris::save_preinstalled_handler(int sig,
4074 struct sigaction& oldAct) {
4075 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4076 assert((chainedsigactions != (struct sigaction *)NULL) &&
4077 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
4078 chainedsigactions[sig] = oldAct;
4079 preinstalled_sigs[sig] = 1;
4080 }
4081
4082 void os::Solaris::set_signal_handler(int sig, bool set_installed,
4083 bool oktochain) {
4084 // Check for overwrite.
4085 struct sigaction oldAct;
4086 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4087 void* oldhand =
4088 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4089 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4090 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4091 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4092 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4093 if (AllowUserSignalHandlers || !set_installed) {
4094 // Do not overwrite; user takes responsibility to forward to us.
4095 return;
4096 } else if (UseSignalChaining) {
4097 if (oktochain) {
4098 // save the old handler in jvm
4099 save_preinstalled_handler(sig, oldAct);
4100 } else {
4101 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4102 }
4103 // libjsig also interposes the sigaction() call below and saves the
4104 // old sigaction on it own.
4105 } else {
4106 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4107 "%#lx for signal %d.", (long)oldhand, sig));
4108 }
4109 }
4110
4111 struct sigaction sigAct;
4112 sigfillset(&(sigAct.sa_mask));
4113 sigAct.sa_handler = SIG_DFL;
4114
4115 sigAct.sa_sigaction = signalHandler;
4116 // Handle SIGSEGV on alternate signal stack if
4117 // not using stack banging
4118 if (!UseStackBanging && sig == SIGSEGV) {
4119 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4120 } else if (sig == os::Solaris::SIGinterrupt()) {
4121 // Interruptible i/o requires SA_RESTART cleared so EINTR
4122 // is returned instead of restarting system calls
4123 sigemptyset(&sigAct.sa_mask);
4124 sigAct.sa_handler = NULL;
4125 sigAct.sa_flags = SA_SIGINFO;
4126 sigAct.sa_sigaction = sigINTRHandler;
4127 } else {
4128 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4129 }
4130 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4131
4132 sigaction(sig, &sigAct, &oldAct);
4133
4134 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4135 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4136 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4137 }
4138
4139
4140 #define DO_SIGNAL_CHECK(sig) \
4141 do { \
4142 if (!sigismember(&check_signal_done, sig)) { \
4143 os::Solaris::check_signal_handler(sig); \
4144 } \
4145 } while (0)
4146
4147 // This method is a periodic task to check for misbehaving JNI applications
4148 // under CheckJNI, we can add any periodic checks here
4149
4150 void os::run_periodic_checks() {
4151 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4152 // thereby preventing a NULL checks.
4153 if (!check_addr0_done) check_addr0_done = check_addr0(tty);
4154
4155 if (check_signals == false) return;
4156
4157 // SEGV and BUS if overridden could potentially prevent
4158 // generation of hs*.log in the event of a crash, debugging
4159 // such a case can be very challenging, so we absolutely
4160 // check for the following for a good measure:
4161 DO_SIGNAL_CHECK(SIGSEGV);
4162 DO_SIGNAL_CHECK(SIGILL);
4163 DO_SIGNAL_CHECK(SIGFPE);
4164 DO_SIGNAL_CHECK(SIGBUS);
4165 DO_SIGNAL_CHECK(SIGPIPE);
4166 DO_SIGNAL_CHECK(SIGXFSZ);
4167
4168 // ReduceSignalUsage allows the user to override these handlers
4169 // see comments at the very top and jvm_solaris.h
4170 if (!ReduceSignalUsage) {
4171 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4172 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4173 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4174 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4175 }
4176
4177 // See comments above for using JVM1/JVM2 and UseAltSigs
4178 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4179 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4180
4181 }
4182
4183 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4184
4185 static os_sigaction_t os_sigaction = NULL;
4186
4187 void os::Solaris::check_signal_handler(int sig) {
4188 char buf[O_BUFLEN];
4189 address jvmHandler = NULL;
4190
4191 struct sigaction act;
4192 if (os_sigaction == NULL) {
4193 // only trust the default sigaction, in case it has been interposed
4194 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4195 if (os_sigaction == NULL) return;
4196 }
4197
4198 os_sigaction(sig, (struct sigaction*)NULL, &act);
4199
4200 address thisHandler = (act.sa_flags & SA_SIGINFO)
4201 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4202 : CAST_FROM_FN_PTR(address, act.sa_handler);
4203
4204
4205 switch (sig) {
4206 case SIGSEGV:
4207 case SIGBUS:
4208 case SIGFPE:
4209 case SIGPIPE:
4210 case SIGXFSZ:
4211 case SIGILL:
4212 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4213 break;
4214
4215 case SHUTDOWN1_SIGNAL:
4216 case SHUTDOWN2_SIGNAL:
4217 case SHUTDOWN3_SIGNAL:
4218 case BREAK_SIGNAL:
4219 jvmHandler = (address)user_handler();
4220 break;
4221
4222 default:
4223 int intrsig = os::Solaris::SIGinterrupt();
4224 int asynsig = os::Solaris::SIGasync();
4225
4226 if (sig == intrsig) {
4227 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4228 } else if (sig == asynsig) {
4229 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4230 } else {
4231 return;
4232 }
4233 break;
4234 }
4235
4236
4237 if (thisHandler != jvmHandler) {
4238 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4239 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4240 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4241 // No need to check this sig any longer
4242 sigaddset(&check_signal_done, sig);
4243 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN
4244 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) {
4245 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell",
4246 exception_name(sig, buf, O_BUFLEN));
4247 }
4248 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4249 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4250 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4251 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4252 // No need to check this sig any longer
4253 sigaddset(&check_signal_done, sig);
4254 }
4255
4256 // Print all the signal handler state
4257 if (sigismember(&check_signal_done, sig)) {
4258 print_signal_handlers(tty, buf, O_BUFLEN);
4259 }
4260
4261 }
4262
4263 void os::Solaris::install_signal_handlers() {
4264 bool libjsigdone = false;
4265 signal_handlers_are_installed = true;
4266
4267 // signal-chaining
4268 typedef void (*signal_setting_t)();
4269 signal_setting_t begin_signal_setting = NULL;
4270 signal_setting_t end_signal_setting = NULL;
4271 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4272 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4273 if (begin_signal_setting != NULL) {
4274 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4275 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4276 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4277 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4278 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4279 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4280 libjsig_is_loaded = true;
4281 if (os::Solaris::get_libjsig_version != NULL) {
4282 libjsigversion = (*os::Solaris::get_libjsig_version)();
4283 }
4284 assert(UseSignalChaining, "should enable signal-chaining");
4285 }
4286 if (libjsig_is_loaded) {
4287 // Tell libjsig jvm is setting signal handlers
4288 (*begin_signal_setting)();
4289 }
4290
4291 set_signal_handler(SIGSEGV, true, true);
4292 set_signal_handler(SIGPIPE, true, true);
4293 set_signal_handler(SIGXFSZ, true, true);
4294 set_signal_handler(SIGBUS, true, true);
4295 set_signal_handler(SIGILL, true, true);
4296 set_signal_handler(SIGFPE, true, true);
4297
4298
4299 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4300
4301 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4302 // can not register overridable signals which might be > 32
4303 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4304 // Tell libjsig jvm has finished setting signal handlers
4305 (*end_signal_setting)();
4306 libjsigdone = true;
4307 }
4308 }
4309
4310 // Never ok to chain our SIGinterrupt
4311 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4312 set_signal_handler(os::Solaris::SIGasync(), true, true);
4313
4314 if (libjsig_is_loaded && !libjsigdone) {
4315 // Tell libjsig jvm finishes setting signal handlers
4316 (*end_signal_setting)();
4317 }
4318
4319 // We don't activate signal checker if libjsig is in place, we trust ourselves
4320 // and if UserSignalHandler is installed all bets are off.
4321 // Log that signal checking is off only if -verbose:jni is specified.
4322 if (CheckJNICalls) {
4323 if (libjsig_is_loaded) {
4324 if (PrintJNIResolving) {
4325 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4326 }
4327 check_signals = false;
4328 }
4329 if (AllowUserSignalHandlers) {
4330 if (PrintJNIResolving) {
4331 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4332 }
4333 check_signals = false;
4334 }
4335 }
4336 }
4337
4338
4339 void report_error(const char* file_name, int line_no, const char* title,
4340 const char* format, ...);
4341
4342 const char * signames[] = {
4343 "SIG0",
4344 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4345 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4346 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4347 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4348 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4349 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4350 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4351 "SIGCANCEL", "SIGLOST"
4352 };
4353
4354 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4355 if (0 < exception_code && exception_code <= SIGRTMAX) {
4356 // signal
4357 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4358 jio_snprintf(buf, size, "%s", signames[exception_code]);
4359 } else {
4360 jio_snprintf(buf, size, "SIG%d", exception_code);
4361 }
4362 return buf;
4363 } else {
4364 return NULL;
4365 }
4366 }
4367
4368 // (Static) wrapper for getisax(2) call.
4369 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4370
4371 // (Static) wrappers for the liblgrp API
4372 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4373 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4374 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4375 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4376 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4377 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4378 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4379 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4380 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4381
4382 // (Static) wrapper for meminfo() call.
4383 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4384
4385 static address resolve_symbol_lazy(const char* name) {
4386 address addr = (address) dlsym(RTLD_DEFAULT, name);
4387 if (addr == NULL) {
4388 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4389 addr = (address) dlsym(RTLD_NEXT, name);
4390 }
4391 return addr;
4392 }
4393
4394 static address resolve_symbol(const char* name) {
4395 address addr = resolve_symbol_lazy(name);
4396 if (addr == NULL) {
4397 fatal(dlerror());
4398 }
4399 return addr;
4400 }
4401
4402 void os::Solaris::libthread_init() {
4403 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4404
4405 lwp_priocntl_init();
4406
4407 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4408 if (func == NULL) {
4409 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4410 // Guarantee that this VM is running on an new enough OS (5.6 or
4411 // later) that it will have a new enough libthread.so.
4412 guarantee(func != NULL, "libthread.so is too old.");
4413 }
4414
4415 int size;
4416 void (*handler_info_func)(address *, int *);
4417 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4418 handler_info_func(&handler_start, &size);
4419 handler_end = handler_start + size;
4420 }
4421
4422
4423 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4424 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4425 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4426 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4427 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4428 int os::Solaris::_mutex_scope = USYNC_THREAD;
4429
4430 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4431 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4432 int_fnP_cond_tP os::Solaris::_cond_signal;
4433 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4434 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4435 int_fnP_cond_tP os::Solaris::_cond_destroy;
4436 int os::Solaris::_cond_scope = USYNC_THREAD;
4437
4438 void os::Solaris::synchronization_init() {
4439 if (UseLWPSynchronization) {
4440 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4441 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4442 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4443 os::Solaris::set_mutex_init(lwp_mutex_init);
4444 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4445 os::Solaris::set_mutex_scope(USYNC_THREAD);
4446
4447 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4448 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4449 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4450 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4451 os::Solaris::set_cond_init(lwp_cond_init);
4452 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4453 os::Solaris::set_cond_scope(USYNC_THREAD);
4454 } else {
4455 os::Solaris::set_mutex_scope(USYNC_THREAD);
4456 os::Solaris::set_cond_scope(USYNC_THREAD);
4457
4458 if (UsePthreads) {
4459 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4460 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4461 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4462 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4463 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4464
4465 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4466 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4467 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4468 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4469 os::Solaris::set_cond_init(pthread_cond_default_init);
4470 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4471 } else {
4472 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4473 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4474 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4475 os::Solaris::set_mutex_init(::mutex_init);
4476 os::Solaris::set_mutex_destroy(::mutex_destroy);
4477
4478 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4479 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4480 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4481 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4482 os::Solaris::set_cond_init(::cond_init);
4483 os::Solaris::set_cond_destroy(::cond_destroy);
4484 }
4485 }
4486 }
4487
4488 bool os::Solaris::liblgrp_init() {
4489 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4490 if (handle != NULL) {
4491 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4492 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4493 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4494 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4495 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4496 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4497 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4498 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4499 dlsym(handle, "lgrp_cookie_stale")));
4500
4501 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4502 set_lgrp_cookie(c);
4503 return true;
4504 }
4505 return false;
4506 }
4507
4508 void os::Solaris::misc_sym_init() {
4509 address func;
4510
4511 // getisax
4512 func = resolve_symbol_lazy("getisax");
4513 if (func != NULL) {
4514 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4515 }
4516
4517 // meminfo
4518 func = resolve_symbol_lazy("meminfo");
4519 if (func != NULL) {
4520 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4521 }
4522 }
4523
4524 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4525 assert(_getisax != NULL, "_getisax not set");
4526 return _getisax(array, n);
4527 }
4528
4529 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4530 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4531 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4532
4533 void init_pset_getloadavg_ptr(void) {
4534 pset_getloadavg_ptr =
4535 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4536 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4537 warning("pset_getloadavg function not found");
4538 }
4539 }
4540
4541 int os::Solaris::_dev_zero_fd = -1;
4542
4543 // this is called _before_ the global arguments have been parsed
4544 void os::init(void) {
4545 _initial_pid = getpid();
4546
4547 max_hrtime = first_hrtime = gethrtime();
4548
4549 init_random(1234567);
4550
4551 page_size = sysconf(_SC_PAGESIZE);
4552 if (page_size == -1) {
4553 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4554 strerror(errno)));
4555 }
4556 init_page_sizes((size_t) page_size);
4557
4558 Solaris::initialize_system_info();
4559
4560 // Initialize misc. symbols as soon as possible, so we can use them
4561 // if we need them.
4562 Solaris::misc_sym_init();
4563
4564 int fd = ::open("/dev/zero", O_RDWR);
4565 if (fd < 0) {
4566 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
4567 } else {
4568 Solaris::set_dev_zero_fd(fd);
4569
4570 // Close on exec, child won't inherit.
4571 fcntl(fd, F_SETFD, FD_CLOEXEC);
4572 }
4573
4574 clock_tics_per_sec = CLK_TCK;
4575
4576 // check if dladdr1() exists; dladdr1 can provide more information than
4577 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4578 // and is available on linker patches for 5.7 and 5.8.
4579 // libdl.so must have been loaded, this call is just an entry lookup
4580 void * hdl = dlopen("libdl.so", RTLD_NOW);
4581 if (hdl) {
4582 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4583 }
4584
4585 // (Solaris only) this switches to calls that actually do locking.
4586 ThreadCritical::initialize();
4587
4588 main_thread = thr_self();
4589
4590 // Constant minimum stack size allowed. It must be at least
4591 // the minimum of what the OS supports (thr_min_stack()), and
4592 // enough to allow the thread to get to user bytecode execution.
4593 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4594 // If the pagesize of the VM is greater than 8K determine the appropriate
4595 // number of initial guard pages. The user can change this with the
4596 // command line arguments, if needed.
4597 if (vm_page_size() > 8*K) {
4598 StackYellowPages = 1;
4599 StackRedPages = 1;
4600 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4601 }
4602 }
4603
4604 // To install functions for atexit system call
4605 extern "C" {
4606 static void perfMemory_exit_helper() {
4607 perfMemory_exit();
4608 }
4609 }
4610
4611 // this is called _after_ the global arguments have been parsed
4612 jint os::init_2(void) {
4613 // try to enable extended file IO ASAP, see 6431278
4614 os::Solaris::try_enable_extended_io();
4615
4616 // Allocate a single page and mark it as readable for safepoint polling. Also
4617 // use this first mmap call to check support for MAP_ALIGN.
4618 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4619 page_size,
4620 MAP_PRIVATE | MAP_ALIGN,
4621 PROT_READ);
4622 if (polling_page == NULL) {
4623 has_map_align = false;
4624 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4625 PROT_READ);
4626 }
4627
4628 os::set_polling_page(polling_page);
4629
4630 #ifndef PRODUCT
4631 if (Verbose && PrintMiscellaneous) {
4632 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n",
4633 (intptr_t)polling_page);
4634 }
4635 #endif
4636
4637 if (!UseMembar) {
4638 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE);
4639 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page");
4640 os::set_memory_serialize_page(mem_serialize_page);
4641
4642 #ifndef PRODUCT
4643 if (Verbose && PrintMiscellaneous) {
4644 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n",
4645 (intptr_t)mem_serialize_page);
4646 }
4647 #endif
4648 }
4649
4650 // Check minimum allowable stack size for thread creation and to initialize
4651 // the java system classes, including StackOverflowError - depends on page
4652 // size. Add a page for compiler2 recursion in main thread.
4653 // Add in 2*BytesPerWord times page size to account for VM stack during
4654 // class initialization depending on 32 or 64 bit VM.
4655 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
4656 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
4657 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
4658
4659 size_t threadStackSizeInBytes = ThreadStackSize * K;
4660 if (threadStackSizeInBytes != 0 &&
4661 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
4662 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
4663 os::Solaris::min_stack_allowed/K);
4664 return JNI_ERR;
4665 }
4666
4667 // For 64kbps there will be a 64kb page size, which makes
4668 // the usable default stack size quite a bit less. Increase the
4669 // stack for 64kb (or any > than 8kb) pages, this increases
4670 // virtual memory fragmentation (since we're not creating the
4671 // stack on a power of 2 boundary. The real fix for this
4672 // should be to fix the guard page mechanism.
4673
4674 if (vm_page_size() > 8*K) {
4675 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
4676 ? threadStackSizeInBytes +
4677 ((StackYellowPages + StackRedPages) * vm_page_size())
4678 : 0;
4679 ThreadStackSize = threadStackSizeInBytes/K;
4680 }
4681
4682 // Make the stack size a multiple of the page size so that
4683 // the yellow/red zones can be guarded.
4684 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
4685 vm_page_size()));
4686
4687 Solaris::libthread_init();
4688
4689 if (UseNUMA) {
4690 if (!Solaris::liblgrp_init()) {
4691 UseNUMA = false;
4692 } else {
4693 size_t lgrp_limit = os::numa_get_groups_num();
4694 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
4695 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4696 FREE_C_HEAP_ARRAY(int, lgrp_ids);
4697 if (lgrp_num < 2) {
4698 // There's only one locality group, disable NUMA.
4699 UseNUMA = false;
4700 }
4701 }
4702 if (!UseNUMA && ForceNUMA) {
4703 UseNUMA = true;
4704 }
4705 }
4706
4707 Solaris::signal_sets_init();
4708 Solaris::init_signal_mem();
4709 Solaris::install_signal_handlers();
4710
4711 if (libjsigversion < JSIG_VERSION_1_4_1) {
4712 Maxlibjsigsigs = OLDMAXSIGNUM;
4713 }
4714
4715 // initialize synchronization primitives to use either thread or
4716 // lwp synchronization (controlled by UseLWPSynchronization)
4717 Solaris::synchronization_init();
4718
4719 if (MaxFDLimit) {
4720 // set the number of file descriptors to max. print out error
4721 // if getrlimit/setrlimit fails but continue regardless.
4722 struct rlimit nbr_files;
4723 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4724 if (status != 0) {
4725 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4726 perror("os::init_2 getrlimit failed");
4727 }
4728 } else {
4729 nbr_files.rlim_cur = nbr_files.rlim_max;
4730 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4731 if (status != 0) {
4732 if (PrintMiscellaneous && (Verbose || WizardMode)) {
4733 perror("os::init_2 setrlimit failed");
4734 }
4735 }
4736 }
4737 }
4738
4739 // Calculate theoretical max. size of Threads to guard gainst
4740 // artifical out-of-memory situations, where all available address-
4741 // space has been reserved by thread stacks. Default stack size is 1Mb.
4742 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
4743 JavaThread::stack_size_at_create() : (1*K*K);
4744 assert(pre_thread_stack_size != 0, "Must have a stack");
4745 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
4746 // we should start doing Virtual Memory banging. Currently when the threads will
4747 // have used all but 200Mb of space.
4748 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
4749 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
4750
4751 // at-exit methods are called in the reverse order of their registration.
4752 // In Solaris 7 and earlier, atexit functions are called on return from
4753 // main or as a result of a call to exit(3C). There can be only 32 of
4754 // these functions registered and atexit() does not set errno. In Solaris
4755 // 8 and later, there is no limit to the number of functions registered
4756 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
4757 // functions are called upon dlclose(3DL) in addition to return from main
4758 // and exit(3C).
4759
4760 if (PerfAllowAtExitRegistration) {
4761 // only register atexit functions if PerfAllowAtExitRegistration is set.
4762 // atexit functions can be delayed until process exit time, which
4763 // can be problematic for embedded VM situations. Embedded VMs should
4764 // call DestroyJavaVM() to assure that VM resources are released.
4765
4766 // note: perfMemory_exit_helper atexit function may be removed in
4767 // the future if the appropriate cleanup code can be added to the
4768 // VM_Exit VMOperation's doit method.
4769 if (atexit(perfMemory_exit_helper) != 0) {
4770 warning("os::init2 atexit(perfMemory_exit_helper) failed");
4771 }
4772 }
4773
4774 // Init pset_loadavg function pointer
4775 init_pset_getloadavg_ptr();
4776
4777 return JNI_OK;
4778 }
4779
4780 // Mark the polling page as unreadable
4781 void os::make_polling_page_unreadable(void) {
4782 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) {
4783 fatal("Could not disable polling page");
4784 }
4785 }
4786
4787 // Mark the polling page as readable
4788 void os::make_polling_page_readable(void) {
4789 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) {
4790 fatal("Could not enable polling page");
4791 }
4792 }
4793
4794 // OS interface.
4795
4796 bool os::check_heap(bool force) { return true; }
4797
4798 // Is a (classpath) directory empty?
4799 bool os::dir_is_empty(const char* path) {
4800 DIR *dir = NULL;
4801 struct dirent *ptr;
4802
4803 dir = opendir(path);
4804 if (dir == NULL) return true;
4805
4806 // Scan the directory
4807 bool result = true;
4808 char buf[sizeof(struct dirent) + MAX_PATH];
4809 struct dirent *dbuf = (struct dirent *) buf;
4810 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
4811 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
4812 result = false;
4813 }
4814 }
4815 closedir(dir);
4816 return result;
4817 }
4818
4819 // This code originates from JDK's sysOpen and open64_w
4820 // from src/solaris/hpi/src/system_md.c
4821
4822 int os::open(const char *path, int oflag, int mode) {
4823 if (strlen(path) > MAX_PATH - 1) {
4824 errno = ENAMETOOLONG;
4825 return -1;
4826 }
4827 int fd;
4828
4829 fd = ::open64(path, oflag, mode);
4830 if (fd == -1) return -1;
4831
4832 // If the open succeeded, the file might still be a directory
4833 {
4834 struct stat64 buf64;
4835 int ret = ::fstat64(fd, &buf64);
4836 int st_mode = buf64.st_mode;
4837
4838 if (ret != -1) {
4839 if ((st_mode & S_IFMT) == S_IFDIR) {
4840 errno = EISDIR;
4841 ::close(fd);
4842 return -1;
4843 }
4844 } else {
4845 ::close(fd);
4846 return -1;
4847 }
4848 }
4849
4850 // 32-bit Solaris systems suffer from:
4851 //
4852 // - an historical default soft limit of 256 per-process file
4853 // descriptors that is too low for many Java programs.
4854 //
4855 // - a design flaw where file descriptors created using stdio
4856 // fopen must be less than 256, _even_ when the first limit above
4857 // has been raised. This can cause calls to fopen (but not calls to
4858 // open, for example) to fail mysteriously, perhaps in 3rd party
4859 // native code (although the JDK itself uses fopen). One can hardly
4860 // criticize them for using this most standard of all functions.
4861 //
4862 // We attempt to make everything work anyways by:
4863 //
4864 // - raising the soft limit on per-process file descriptors beyond
4865 // 256
4866 //
4867 // - As of Solaris 10u4, we can request that Solaris raise the 256
4868 // stdio fopen limit by calling function enable_extended_FILE_stdio.
4869 // This is done in init_2 and recorded in enabled_extended_FILE_stdio
4870 //
4871 // - If we are stuck on an old (pre 10u4) Solaris system, we can
4872 // workaround the bug by remapping non-stdio file descriptors below
4873 // 256 to ones beyond 256, which is done below.
4874 //
4875 // See:
4876 // 1085341: 32-bit stdio routines should support file descriptors >255
4877 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files
4878 // 6431278: Netbeans crash on 32 bit Solaris: need to call
4879 // enable_extended_FILE_stdio() in VM initialisation
4880 // Giri Mandalika's blog
4881 // http://technopark02.blogspot.com/2005_05_01_archive.html
4882 //
4883 #ifndef _LP64
4884 if ((!enabled_extended_FILE_stdio) && fd < 256) {
4885 int newfd = ::fcntl(fd, F_DUPFD, 256);
4886 if (newfd != -1) {
4887 ::close(fd);
4888 fd = newfd;
4889 }
4890 }
4891 #endif // 32-bit Solaris
4892
4893 // All file descriptors that are opened in the JVM and not
4894 // specifically destined for a subprocess should have the
4895 // close-on-exec flag set. If we don't set it, then careless 3rd
4896 // party native code might fork and exec without closing all
4897 // appropriate file descriptors (e.g. as we do in closeDescriptors in
4898 // UNIXProcess.c), and this in turn might:
4899 //
4900 // - cause end-of-file to fail to be detected on some file
4901 // descriptors, resulting in mysterious hangs, or
4902 //
4903 // - might cause an fopen in the subprocess to fail on a system
4904 // suffering from bug 1085341.
4905 //
4906 // (Yes, the default setting of the close-on-exec flag is a Unix
4907 // design flaw)
4908 //
4909 // See:
4910 // 1085341: 32-bit stdio routines should support file descriptors >255
4911 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed
4912 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
4913 //
4914 #ifdef FD_CLOEXEC
4915 {
4916 int flags = ::fcntl(fd, F_GETFD);
4917 if (flags != -1) {
4918 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
4919 }
4920 }
4921 #endif
4922
4923 return fd;
4924 }
4925
4926 // create binary file, rewriting existing file if required
4927 int os::create_binary_file(const char* path, bool rewrite_existing) {
4928 int oflags = O_WRONLY | O_CREAT;
4929 if (!rewrite_existing) {
4930 oflags |= O_EXCL;
4931 }
4932 return ::open64(path, oflags, S_IREAD | S_IWRITE);
4933 }
4934
4935 // return current position of file pointer
4936 jlong os::current_file_offset(int fd) {
4937 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
4938 }
4939
4940 // move file pointer to the specified offset
4941 jlong os::seek_to_file_offset(int fd, jlong offset) {
4942 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
4943 }
4944
4945 jlong os::lseek(int fd, jlong offset, int whence) {
4946 return (jlong) ::lseek64(fd, offset, whence);
4947 }
4948
4949 char * os::native_path(char *path) {
4950 return path;
4951 }
4952
4953 int os::ftruncate(int fd, jlong length) {
4954 return ::ftruncate64(fd, length);
4955 }
4956
4957 int os::fsync(int fd) {
4958 RESTARTABLE_RETURN_INT(::fsync(fd));
4959 }
4960
4961 int os::available(int fd, jlong *bytes) {
4962 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
4963 "Assumed _thread_in_native");
4964 jlong cur, end;
4965 int mode;
4966 struct stat64 buf64;
4967
4968 if (::fstat64(fd, &buf64) >= 0) {
4969 mode = buf64.st_mode;
4970 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
4971 int n,ioctl_return;
4972
4973 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return);
4974 if (ioctl_return>= 0) {
4975 *bytes = n;
4976 return 1;
4977 }
4978 }
4979 }
4980 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
4981 return 0;
4982 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
4983 return 0;
4984 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
4985 return 0;
4986 }
4987 *bytes = end - cur;
4988 return 1;
4989 }
4990
4991 // Map a block of memory.
4992 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
4993 char *addr, size_t bytes, bool read_only,
4994 bool allow_exec) {
4995 int prot;
4996 int flags;
4997
4998 if (read_only) {
4999 prot = PROT_READ;
5000 flags = MAP_SHARED;
5001 } else {
5002 prot = PROT_READ | PROT_WRITE;
5003 flags = MAP_PRIVATE;
5004 }
5005
5006 if (allow_exec) {
5007 prot |= PROT_EXEC;
5008 }
5009
5010 if (addr != NULL) {
5011 flags |= MAP_FIXED;
5012 }
5013
5014 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5015 fd, file_offset);
5016 if (mapped_address == MAP_FAILED) {
5017 return NULL;
5018 }
5019 return mapped_address;
5020 }
5021
5022
5023 // Remap a block of memory.
5024 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5025 char *addr, size_t bytes, bool read_only,
5026 bool allow_exec) {
5027 // same as map_memory() on this OS
5028 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5029 allow_exec);
5030 }
5031
5032
5033 // Unmap a block of memory.
5034 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5035 return munmap(addr, bytes) == 0;
5036 }
5037
5038 void os::pause() {
5039 char filename[MAX_PATH];
5040 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5041 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5042 } else {
5043 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5044 }
5045
5046 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5047 if (fd != -1) {
5048 struct stat buf;
5049 ::close(fd);
5050 while (::stat(filename, &buf) == 0) {
5051 (void)::poll(NULL, 0, 100);
5052 }
5053 } else {
5054 jio_fprintf(stderr,
5055 "Could not open pause file '%s', continuing immediately.\n", filename);
5056 }
5057 }
5058
5059 #ifndef PRODUCT
5060 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5061 // Turn this on if you need to trace synch operations.
5062 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5063 // and call record_synch_enable and record_synch_disable
5064 // around the computation of interest.
5065
5066 void record_synch(char* name, bool returning); // defined below
5067
5068 class RecordSynch {
5069 char* _name;
5070 public:
5071 RecordSynch(char* name) :_name(name) { record_synch(_name, false); }
5072 ~RecordSynch() { record_synch(_name, true); }
5073 };
5074
5075 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5076 extern "C" ret name params { \
5077 typedef ret name##_t params; \
5078 static name##_t* implem = NULL; \
5079 static int callcount = 0; \
5080 if (implem == NULL) { \
5081 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5082 if (implem == NULL) fatal(dlerror()); \
5083 } \
5084 ++callcount; \
5085 RecordSynch _rs(#name); \
5086 inner; \
5087 return implem args; \
5088 }
5089 // in dbx, examine callcounts this way:
5090 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5091
5092 #define CHECK_POINTER_OK(p) \
5093 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5094 #define CHECK_MU \
5095 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5096 #define CHECK_CV \
5097 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5098 #define CHECK_P(p) \
5099 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5100
5101 #define CHECK_MUTEX(mutex_op) \
5102 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5103
5104 CHECK_MUTEX( mutex_lock)
5105 CHECK_MUTEX( _mutex_lock)
5106 CHECK_MUTEX( mutex_unlock)
5107 CHECK_MUTEX(_mutex_unlock)
5108 CHECK_MUTEX( mutex_trylock)
5109 CHECK_MUTEX(_mutex_trylock)
5110
5111 #define CHECK_COND(cond_op) \
5112 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV);
5113
5114 CHECK_COND( cond_wait);
5115 CHECK_COND(_cond_wait);
5116 CHECK_COND(_cond_wait_cancel);
5117
5118 #define CHECK_COND2(cond_op) \
5119 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV);
5120
5121 CHECK_COND2( cond_timedwait);
5122 CHECK_COND2(_cond_timedwait);
5123 CHECK_COND2(_cond_timedwait_cancel);
5124
5125 // do the _lwp_* versions too
5126 #define mutex_t lwp_mutex_t
5127 #define cond_t lwp_cond_t
5128 CHECK_MUTEX( _lwp_mutex_lock)
5129 CHECK_MUTEX( _lwp_mutex_unlock)
5130 CHECK_MUTEX( _lwp_mutex_trylock)
5131 CHECK_MUTEX( __lwp_mutex_lock)
5132 CHECK_MUTEX( __lwp_mutex_unlock)
5133 CHECK_MUTEX( __lwp_mutex_trylock)
5134 CHECK_MUTEX(___lwp_mutex_lock)
5135 CHECK_MUTEX(___lwp_mutex_unlock)
5136
5137 CHECK_COND( _lwp_cond_wait);
5138 CHECK_COND( __lwp_cond_wait);
5139 CHECK_COND(___lwp_cond_wait);
5140
5141 CHECK_COND2( _lwp_cond_timedwait);
5142 CHECK_COND2( __lwp_cond_timedwait);
5143 #undef mutex_t
5144 #undef cond_t
5145
5146 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5147 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5148 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5149 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5150 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5151 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5152 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5153 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5154
5155
5156 // recording machinery:
5157
5158 enum { RECORD_SYNCH_LIMIT = 200 };
5159 char* record_synch_name[RECORD_SYNCH_LIMIT];
5160 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5161 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5162 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5163 int record_synch_count = 0;
5164 bool record_synch_enabled = false;
5165
5166 // in dbx, examine recorded data this way:
5167 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5168
5169 void record_synch(char* name, bool returning) {
5170 if (record_synch_enabled) {
5171 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5172 record_synch_name[record_synch_count] = name;
5173 record_synch_returning[record_synch_count] = returning;
5174 record_synch_thread[record_synch_count] = thr_self();
5175 record_synch_arg0ptr[record_synch_count] = &name;
5176 record_synch_count++;
5177 }
5178 // put more checking code here:
5179 // ...
5180 }
5181 }
5182
5183 void record_synch_enable() {
5184 // start collecting trace data, if not already doing so
5185 if (!record_synch_enabled) record_synch_count = 0;
5186 record_synch_enabled = true;
5187 }
5188
5189 void record_synch_disable() {
5190 // stop collecting trace data
5191 record_synch_enabled = false;
5192 }
5193
5194 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5195 #endif // PRODUCT
5196
5197 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5198 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5199 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5200
5201
5202 // JVMTI & JVM monitoring and management support
5203 // The thread_cpu_time() and current_thread_cpu_time() are only
5204 // supported if is_thread_cpu_time_supported() returns true.
5205 // They are not supported on Solaris T1.
5206
5207 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5208 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5209 // of a thread.
5210 //
5211 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5212 // returns the fast estimate available on the platform.
5213
5214 // hrtime_t gethrvtime() return value includes
5215 // user time but does not include system time
5216 jlong os::current_thread_cpu_time() {
5217 return (jlong) gethrvtime();
5218 }
5219
5220 jlong os::thread_cpu_time(Thread *thread) {
5221 // return user level CPU time only to be consistent with
5222 // what current_thread_cpu_time returns.
5223 // thread_cpu_time_info() must be changed if this changes
5224 return os::thread_cpu_time(thread, false /* user time only */);
5225 }
5226
5227 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5228 if (user_sys_cpu_time) {
5229 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5230 } else {
5231 return os::current_thread_cpu_time();
5232 }
5233 }
5234
5235 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5236 char proc_name[64];
5237 int count;
5238 prusage_t prusage;
5239 jlong lwp_time;
5240 int fd;
5241
5242 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5243 getpid(),
5244 thread->osthread()->lwp_id());
5245 fd = ::open(proc_name, O_RDONLY);
5246 if (fd == -1) return -1;
5247
5248 do {
5249 count = ::pread(fd,
5250 (void *)&prusage.pr_utime,
5251 thr_time_size,
5252 thr_time_off);
5253 } while (count < 0 && errno == EINTR);
5254 ::close(fd);
5255 if (count < 0) return -1;
5256
5257 if (user_sys_cpu_time) {
5258 // user + system CPU time
5259 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5260 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5261 (jlong)prusage.pr_stime.tv_nsec +
5262 (jlong)prusage.pr_utime.tv_nsec;
5263 } else {
5264 // user level CPU time only
5265 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5266 (jlong)prusage.pr_utime.tv_nsec;
5267 }
5268
5269 return (lwp_time);
5270 }
5271
5272 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5273 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5274 info_ptr->may_skip_backward = false; // elapsed time not wall time
5275 info_ptr->may_skip_forward = false; // elapsed time not wall time
5276 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5277 }
5278
5279 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5280 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5281 info_ptr->may_skip_backward = false; // elapsed time not wall time
5282 info_ptr->may_skip_forward = false; // elapsed time not wall time
5283 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5284 }
5285
5286 bool os::is_thread_cpu_time_supported() {
5287 return true;
5288 }
5289
5290 // System loadavg support. Returns -1 if load average cannot be obtained.
5291 // Return the load average for our processor set if the primitive exists
5292 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5293 int os::loadavg(double loadavg[], int nelem) {
5294 if (pset_getloadavg_ptr != NULL) {
5295 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5296 } else {
5297 return ::getloadavg(loadavg, nelem);
5298 }
5299 }
5300
5301 //---------------------------------------------------------------------------------
5302
5303 bool os::find(address addr, outputStream* st) {
5304 Dl_info dlinfo;
5305 memset(&dlinfo, 0, sizeof(dlinfo));
5306 if (dladdr(addr, &dlinfo) != 0) {
5307 st->print(PTR_FORMAT ": ", addr);
5308 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
5309 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5310 } else if (dlinfo.dli_fbase != NULL) {
5311 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5312 } else {
5313 st->print("<absolute address>");
5314 }
5315 if (dlinfo.dli_fname != NULL) {
5316 st->print(" in %s", dlinfo.dli_fname);
5317 }
5318 if (dlinfo.dli_fbase != NULL) {
5319 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
5320 }
5321 st->cr();
5322
5323 if (Verbose) {
5324 // decode some bytes around the PC
5325 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size());
5326 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size());
5327 address lowest = (address) dlinfo.dli_sname;
5328 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5329 if (begin < lowest) begin = lowest;
5330 Dl_info dlinfo2;
5331 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
5332 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) {
5333 end = (address) dlinfo2.dli_saddr;
5334 }
5335 Disassembler::decode(begin, end, st);
5336 }
5337 return true;
5338 }
5339 return false;
5340 }
5341
5342 // Following function has been added to support HotSparc's libjvm.so running
5343 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5344 // src/solaris/hpi/native_threads in the EVM codebase.
5345 //
5346 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5347 // libraries and should thus be removed. We will leave it behind for a while
5348 // until we no longer want to able to run on top of 1.3.0 Solaris production
5349 // JDK. See 4341971.
5350
5351 #define STACK_SLACK 0x800
5352
5353 extern "C" {
5354 intptr_t sysThreadAvailableStackWithSlack() {
5355 stack_t st;
5356 intptr_t retval, stack_top;
5357 retval = thr_stksegment(&st);
5358 assert(retval == 0, "incorrect return value from thr_stksegment");
5359 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5360 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5361 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5362 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5363 }
5364 }
5365
5366 // ObjectMonitor park-unpark infrastructure ...
5367 //
5368 // We implement Solaris and Linux PlatformEvents with the
5369 // obvious condvar-mutex-flag triple.
5370 // Another alternative that works quite well is pipes:
5371 // Each PlatformEvent consists of a pipe-pair.
5372 // The thread associated with the PlatformEvent
5373 // calls park(), which reads from the input end of the pipe.
5374 // Unpark() writes into the other end of the pipe.
5375 // The write-side of the pipe must be set NDELAY.
5376 // Unfortunately pipes consume a large # of handles.
5377 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5378 // Using pipes for the 1st few threads might be workable, however.
5379 //
5380 // park() is permitted to return spuriously.
5381 // Callers of park() should wrap the call to park() in
5382 // an appropriate loop. A litmus test for the correct
5383 // usage of park is the following: if park() were modified
5384 // to immediately return 0 your code should still work,
5385 // albeit degenerating to a spin loop.
5386 //
5387 // In a sense, park()-unpark() just provides more polite spinning
5388 // and polling with the key difference over naive spinning being
5389 // that a parked thread needs to be explicitly unparked() in order
5390 // to wake up and to poll the underlying condition.
5391 //
5392 // Assumption:
5393 // Only one parker can exist on an event, which is why we allocate
5394 // them per-thread. Multiple unparkers can coexist.
5395 //
5396 // _Event transitions in park()
5397 // -1 => -1 : illegal
5398 // 1 => 0 : pass - return immediately
5399 // 0 => -1 : block; then set _Event to 0 before returning
5400 //
5401 // _Event transitions in unpark()
5402 // 0 => 1 : just return
5403 // 1 => 1 : just return
5404 // -1 => either 0 or 1; must signal target thread
5405 // That is, we can safely transition _Event from -1 to either
5406 // 0 or 1.
5407 //
5408 // _Event serves as a restricted-range semaphore.
5409 // -1 : thread is blocked, i.e. there is a waiter
5410 // 0 : neutral: thread is running or ready,
5411 // could have been signaled after a wait started
5412 // 1 : signaled - thread is running or ready
5413 //
5414 // Another possible encoding of _Event would be with
5415 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5416 //
5417 // TODO-FIXME: add DTRACE probes for:
5418 // 1. Tx parks
5419 // 2. Ty unparks Tx
5420 // 3. Tx resumes from park
5421
5422
5423 // value determined through experimentation
5424 #define ROUNDINGFIX 11
5425
5426 // utility to compute the abstime argument to timedwait.
5427 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5428
5429 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5430 // millis is the relative timeout time
5431 // abstime will be the absolute timeout time
5432 if (millis < 0) millis = 0;
5433 struct timeval now;
5434 int status = gettimeofday(&now, NULL);
5435 assert(status == 0, "gettimeofday");
5436 jlong seconds = millis / 1000;
5437 jlong max_wait_period;
5438
5439 if (UseLWPSynchronization) {
5440 // forward port of fix for 4275818 (not sleeping long enough)
5441 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5442 // _lwp_cond_timedwait() used a round_down algorithm rather
5443 // than a round_up. For millis less than our roundfactor
5444 // it rounded down to 0 which doesn't meet the spec.
5445 // For millis > roundfactor we may return a bit sooner, but
5446 // since we can not accurately identify the patch level and
5447 // this has already been fixed in Solaris 9 and 8 we will
5448 // leave it alone rather than always rounding down.
5449
5450 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5451 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5452 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5453 max_wait_period = 21000000;
5454 } else {
5455 max_wait_period = 50000000;
5456 }
5457 millis %= 1000;
5458 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5459 seconds = max_wait_period;
5460 }
5461 abstime->tv_sec = now.tv_sec + seconds;
5462 long usec = now.tv_usec + millis * 1000;
5463 if (usec >= 1000000) {
5464 abstime->tv_sec += 1;
5465 usec -= 1000000;
5466 }
5467 abstime->tv_nsec = usec * 1000;
5468 return abstime;
5469 }
5470
5471 void os::PlatformEvent::park() { // AKA: down()
5472 // Transitions for _Event:
5473 // -1 => -1 : illegal
5474 // 1 => 0 : pass - return immediately
5475 // 0 => -1 : block; then set _Event to 0 before returning
5476
5477 // Invariant: Only the thread associated with the Event/PlatformEvent
5478 // may call park().
5479 assert(_nParked == 0, "invariant");
5480
5481 int v;
5482 for (;;) {
5483 v = _Event;
5484 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5485 }
5486 guarantee(v >= 0, "invariant");
5487 if (v == 0) {
5488 // Do this the hard way by blocking ...
5489 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5490 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5491 // Only for SPARC >= V8PlusA
5492 #if defined(__sparc) && defined(COMPILER2)
5493 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5494 #endif
5495 int status = os::Solaris::mutex_lock(_mutex);
5496 assert_status(status == 0, status, "mutex_lock");
5497 guarantee(_nParked == 0, "invariant");
5498 ++_nParked;
5499 while (_Event < 0) {
5500 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5501 // Treat this the same as if the wait was interrupted
5502 // With usr/lib/lwp going to kernel, always handle ETIME
5503 status = os::Solaris::cond_wait(_cond, _mutex);
5504 if (status == ETIME) status = EINTR;
5505 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5506 }
5507 --_nParked;
5508 _Event = 0;
5509 status = os::Solaris::mutex_unlock(_mutex);
5510 assert_status(status == 0, status, "mutex_unlock");
5511 // Paranoia to ensure our locked and lock-free paths interact
5512 // correctly with each other.
5513 OrderAccess::fence();
5514 }
5515 }
5516
5517 int os::PlatformEvent::park(jlong millis) {
5518 // Transitions for _Event:
5519 // -1 => -1 : illegal
5520 // 1 => 0 : pass - return immediately
5521 // 0 => -1 : block; then set _Event to 0 before returning
5522
5523 guarantee(_nParked == 0, "invariant");
5524 int v;
5525 for (;;) {
5526 v = _Event;
5527 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5528 }
5529 guarantee(v >= 0, "invariant");
5530 if (v != 0) return OS_OK;
5531
5532 int ret = OS_TIMEOUT;
5533 timestruc_t abst;
5534 compute_abstime(&abst, millis);
5535
5536 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5537 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5538 // Only for SPARC >= V8PlusA
5539 #if defined(__sparc) && defined(COMPILER2)
5540 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5541 #endif
5542 int status = os::Solaris::mutex_lock(_mutex);
5543 assert_status(status == 0, status, "mutex_lock");
5544 guarantee(_nParked == 0, "invariant");
5545 ++_nParked;
5546 while (_Event < 0) {
5547 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5548 assert_status(status == 0 || status == EINTR ||
5549 status == ETIME || status == ETIMEDOUT,
5550 status, "cond_timedwait");
5551 if (!FilterSpuriousWakeups) break; // previous semantics
5552 if (status == ETIME || status == ETIMEDOUT) break;
5553 // We consume and ignore EINTR and spurious wakeups.
5554 }
5555 --_nParked;
5556 if (_Event >= 0) ret = OS_OK;
5557 _Event = 0;
5558 status = os::Solaris::mutex_unlock(_mutex);
5559 assert_status(status == 0, status, "mutex_unlock");
5560 // Paranoia to ensure our locked and lock-free paths interact
5561 // correctly with each other.
5562 OrderAccess::fence();
5563 return ret;
5564 }
5565
5566 void os::PlatformEvent::unpark() {
5567 // Transitions for _Event:
5568 // 0 => 1 : just return
5569 // 1 => 1 : just return
5570 // -1 => either 0 or 1; must signal target thread
5571 // That is, we can safely transition _Event from -1 to either
5572 // 0 or 1.
5573 // See also: "Semaphores in Plan 9" by Mullender & Cox
5574 //
5575 // Note: Forcing a transition from "-1" to "1" on an unpark() means
5576 // that it will take two back-to-back park() calls for the owning
5577 // thread to block. This has the benefit of forcing a spurious return
5578 // from the first park() call after an unpark() call which will help
5579 // shake out uses of park() and unpark() without condition variables.
5580
5581 if (Atomic::xchg(1, &_Event) >= 0) return;
5582
5583 // If the thread associated with the event was parked, wake it.
5584 // Wait for the thread assoc with the PlatformEvent to vacate.
5585 int status = os::Solaris::mutex_lock(_mutex);
5586 assert_status(status == 0, status, "mutex_lock");
5587 int AnyWaiters = _nParked;
5588 status = os::Solaris::mutex_unlock(_mutex);
5589 assert_status(status == 0, status, "mutex_unlock");
5590 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
5591 if (AnyWaiters != 0) {
5592 // Note that we signal() *after* dropping the lock for "immortal" Events.
5593 // This is safe and avoids a common class of futile wakeups. In rare
5594 // circumstances this can cause a thread to return prematurely from
5595 // cond_{timed}wait() but the spurious wakeup is benign and the victim
5596 // will simply re-test the condition and re-park itself.
5597 // This provides particular benefit if the underlying platform does not
5598 // provide wait morphing.
5599 status = os::Solaris::cond_signal(_cond);
5600 assert_status(status == 0, status, "cond_signal");
5601 }
5602 }
5603
5604 // JSR166
5605 // -------------------------------------------------------
5606
5607 // The solaris and linux implementations of park/unpark are fairly
5608 // conservative for now, but can be improved. They currently use a
5609 // mutex/condvar pair, plus _counter.
5610 // Park decrements _counter if > 0, else does a condvar wait. Unpark
5611 // sets count to 1 and signals condvar. Only one thread ever waits
5612 // on the condvar. Contention seen when trying to park implies that someone
5613 // is unparking you, so don't wait. And spurious returns are fine, so there
5614 // is no need to track notifications.
5615
5616 #define MAX_SECS 100000000
5617
5618 // This code is common to linux and solaris and will be moved to a
5619 // common place in dolphin.
5620 //
5621 // The passed in time value is either a relative time in nanoseconds
5622 // or an absolute time in milliseconds. Either way it has to be unpacked
5623 // into suitable seconds and nanoseconds components and stored in the
5624 // given timespec structure.
5625 // Given time is a 64-bit value and the time_t used in the timespec is only
5626 // a signed-32-bit value (except on 64-bit Linux) we have to watch for
5627 // overflow if times way in the future are given. Further on Solaris versions
5628 // prior to 10 there is a restriction (see cond_timedwait) that the specified
5629 // number of seconds, in abstime, is less than current_time + 100,000,000.
5630 // As it will be 28 years before "now + 100000000" will overflow we can
5631 // ignore overflow and just impose a hard-limit on seconds using the value
5632 // of "now + 100,000,000". This places a limit on the timeout of about 3.17
5633 // years from "now".
5634 //
5635 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5636 assert(time > 0, "convertTime");
5637
5638 struct timeval now;
5639 int status = gettimeofday(&now, NULL);
5640 assert(status == 0, "gettimeofday");
5641
5642 time_t max_secs = now.tv_sec + MAX_SECS;
5643
5644 if (isAbsolute) {
5645 jlong secs = time / 1000;
5646 if (secs > max_secs) {
5647 absTime->tv_sec = max_secs;
5648 } else {
5649 absTime->tv_sec = secs;
5650 }
5651 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5652 } else {
5653 jlong secs = time / NANOSECS_PER_SEC;
5654 if (secs >= MAX_SECS) {
5655 absTime->tv_sec = max_secs;
5656 absTime->tv_nsec = 0;
5657 } else {
5658 absTime->tv_sec = now.tv_sec + secs;
5659 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5660 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5661 absTime->tv_nsec -= NANOSECS_PER_SEC;
5662 ++absTime->tv_sec; // note: this must be <= max_secs
5663 }
5664 }
5665 }
5666 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5667 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5668 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5669 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5670 }
5671
5672 void Parker::park(bool isAbsolute, jlong time) {
5673 // Ideally we'd do something useful while spinning, such
5674 // as calling unpackTime().
5675
5676 // Optional fast-path check:
5677 // Return immediately if a permit is available.
5678 // We depend on Atomic::xchg() having full barrier semantics
5679 // since we are doing a lock-free update to _counter.
5680 if (Atomic::xchg(0, &_counter) > 0) return;
5681
5682 // Optional fast-exit: Check interrupt before trying to wait
5683 Thread* thread = Thread::current();
5684 assert(thread->is_Java_thread(), "Must be JavaThread");
5685 JavaThread *jt = (JavaThread *)thread;
5686 if (Thread::is_interrupted(thread, false)) {
5687 return;
5688 }
5689
5690 // First, demultiplex/decode time arguments
5691 timespec absTime;
5692 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all
5693 return;
5694 }
5695 if (time > 0) {
5696 // Warning: this code might be exposed to the old Solaris time
5697 // round-down bugs. Grep "roundingFix" for details.
5698 unpackTime(&absTime, isAbsolute, time);
5699 }
5700
5701 // Enter safepoint region
5702 // Beware of deadlocks such as 6317397.
5703 // The per-thread Parker:: _mutex is a classic leaf-lock.
5704 // In particular a thread must never block on the Threads_lock while
5705 // holding the Parker:: mutex. If safepoints are pending both the
5706 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
5707 ThreadBlockInVM tbivm(jt);
5708
5709 // Don't wait if cannot get lock since interference arises from
5710 // unblocking. Also. check interrupt before trying wait
5711 if (Thread::is_interrupted(thread, false) ||
5712 os::Solaris::mutex_trylock(_mutex) != 0) {
5713 return;
5714 }
5715
5716 int status;
5717
5718 if (_counter > 0) { // no wait needed
5719 _counter = 0;
5720 status = os::Solaris::mutex_unlock(_mutex);
5721 assert(status == 0, "invariant");
5722 // Paranoia to ensure our locked and lock-free paths interact
5723 // correctly with each other and Java-level accesses.
5724 OrderAccess::fence();
5725 return;
5726 }
5727
5728 #ifdef ASSERT
5729 // Don't catch signals while blocked; let the running threads have the signals.
5730 // (This allows a debugger to break into the running thread.)
5731 sigset_t oldsigs;
5732 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
5733 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
5734 #endif
5735
5736 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
5737 jt->set_suspend_equivalent();
5738 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
5739
5740 // Do this the hard way by blocking ...
5741 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5742 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5743 // Only for SPARC >= V8PlusA
5744 #if defined(__sparc) && defined(COMPILER2)
5745 if (ClearFPUAtPark) { _mark_fpu_nosave(); }
5746 #endif
5747
5748 if (time == 0) {
5749 status = os::Solaris::cond_wait(_cond, _mutex);
5750 } else {
5751 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
5752 }
5753 // Note that an untimed cond_wait() can sometimes return ETIME on older
5754 // versions of the Solaris.
5755 assert_status(status == 0 || status == EINTR ||
5756 status == ETIME || status == ETIMEDOUT,
5757 status, "cond_timedwait");
5758
5759 #ifdef ASSERT
5760 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
5761 #endif
5762 _counter = 0;
5763 status = os::Solaris::mutex_unlock(_mutex);
5764 assert_status(status == 0, status, "mutex_unlock");
5765 // Paranoia to ensure our locked and lock-free paths interact
5766 // correctly with each other and Java-level accesses.
5767 OrderAccess::fence();
5768
5769 // If externally suspended while waiting, re-suspend
5770 if (jt->handle_special_suspend_equivalent_condition()) {
5771 jt->java_suspend_self();
5772 }
5773 }
5774
5775 void Parker::unpark() {
5776 int status = os::Solaris::mutex_lock(_mutex);
5777 assert(status == 0, "invariant");
5778 const int s = _counter;
5779 _counter = 1;
5780 status = os::Solaris::mutex_unlock(_mutex);
5781 assert(status == 0, "invariant");
5782
5783 if (s < 1) {
5784 status = os::Solaris::cond_signal(_cond);
5785 assert(status == 0, "invariant");
5786 }
5787 }
5788
5789 extern char** environ;
5790
5791 // Run the specified command in a separate process. Return its exit value,
5792 // or -1 on failure (e.g. can't fork a new process).
5793 // Unlike system(), this function can be called from signal handler. It
5794 // doesn't block SIGINT et al.
5795 int os::fork_and_exec(char* cmd) {
5796 char * argv[4];
5797 argv[0] = (char *)"sh";
5798 argv[1] = (char *)"-c";
5799 argv[2] = cmd;
5800 argv[3] = NULL;
5801
5802 // fork is async-safe, fork1 is not so can't use in signal handler
5803 pid_t pid;
5804 Thread* t = ThreadLocalStorage::get_thread_slow();
5805 if (t != NULL && t->is_inside_signal_handler()) {
5806 pid = fork();
5807 } else {
5808 pid = fork1();
5809 }
5810
5811 if (pid < 0) {
5812 // fork failed
5813 warning("fork failed: %s", strerror(errno));
5814 return -1;
5815
5816 } else if (pid == 0) {
5817 // child process
5818
5819 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
5820 execve("/usr/bin/sh", argv, environ);
5821
5822 // execve failed
5823 _exit(-1);
5824
5825 } else {
5826 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5827 // care about the actual exit code, for now.
5828
5829 int status;
5830
5831 // Wait for the child process to exit. This returns immediately if
5832 // the child has already exited. */
5833 while (waitpid(pid, &status, 0) < 0) {
5834 switch (errno) {
5835 case ECHILD: return 0;
5836 case EINTR: break;
5837 default: return -1;
5838 }
5839 }
5840
5841 if (WIFEXITED(status)) {
5842 // The child exited normally; get its exit code.
5843 return WEXITSTATUS(status);
5844 } else if (WIFSIGNALED(status)) {
5845 // The child exited because of a signal
5846 // The best value to return is 0x80 + signal number,
5847 // because that is what all Unix shells do, and because
5848 // it allows callers to distinguish between process exit and
5849 // process death by signal.
5850 return 0x80 + WTERMSIG(status);
5851 } else {
5852 // Unknown exit code; pass it through
5853 return status;
5854 }
5855 }
5856 }
5857
5858 // is_headless_jre()
5859 //
5860 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
5861 // in order to report if we are running in a headless jre
5862 //
5863 // Since JDK8 xawt/libmawt.so was moved into the same directory
5864 // as libawt.so, and renamed libawt_xawt.so
5865 //
5866 bool os::is_headless_jre() {
5867 struct stat statbuf;
5868 char buf[MAXPATHLEN];
5869 char libmawtpath[MAXPATHLEN];
5870 const char *xawtstr = "/xawt/libmawt.so";
5871 const char *new_xawtstr = "/libawt_xawt.so";
5872 char *p;
5873
5874 // Get path to libjvm.so
5875 os::jvm_path(buf, sizeof(buf));
5876
5877 // Get rid of libjvm.so
5878 p = strrchr(buf, '/');
5879 if (p == NULL) {
5880 return false;
5881 } else {
5882 *p = '\0';
5883 }
5884
5885 // Get rid of client or server
5886 p = strrchr(buf, '/');
5887 if (p == NULL) {
5888 return false;
5889 } else {
5890 *p = '\0';
5891 }
5892
5893 // check xawt/libmawt.so
5894 strcpy(libmawtpath, buf);
5895 strcat(libmawtpath, xawtstr);
5896 if (::stat(libmawtpath, &statbuf) == 0) return false;
5897
5898 // check libawt_xawt.so
5899 strcpy(libmawtpath, buf);
5900 strcat(libmawtpath, new_xawtstr);
5901 if (::stat(libmawtpath, &statbuf) == 0) return false;
5902
5903 return true;
5904 }
5905
5906 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
5907 size_t res;
5908 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5909 "Assumed _thread_in_native");
5910 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
5911 return res;
5912 }
5913
5914 int os::close(int fd) {
5915 return ::close(fd);
5916 }
5917
5918 int os::socket_close(int fd) {
5919 return ::close(fd);
5920 }
5921
5922 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
5923 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5924 "Assumed _thread_in_native");
5925 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags));
5926 }
5927
5928 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
5929 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5930 "Assumed _thread_in_native");
5931 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5932 }
5933
5934 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
5935 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5936 }
5937
5938 // As both poll and select can be interrupted by signals, we have to be
5939 // prepared to restart the system call after updating the timeout, unless
5940 // a poll() is done with timeout == -1, in which case we repeat with this
5941 // "wait forever" value.
5942
5943 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
5944 int _result;
5945 _result = ::connect(fd, him, len);
5946
5947 // On Solaris, when a connect() call is interrupted, the connection
5948 // can be established asynchronously (see 6343810). Subsequent calls
5949 // to connect() must check the errno value which has the semantic
5950 // described below (copied from the connect() man page). Handling
5951 // of asynchronously established connections is required for both
5952 // blocking and non-blocking sockets.
5953 // EINTR The connection attempt was interrupted
5954 // before any data arrived by the delivery of
5955 // a signal. The connection, however, will be
5956 // established asynchronously.
5957 //
5958 // EINPROGRESS The socket is non-blocking, and the connec-
5959 // tion cannot be completed immediately.
5960 //
5961 // EALREADY The socket is non-blocking, and a previous
5962 // connection attempt has not yet been com-
5963 // pleted.
5964 //
5965 // EISCONN The socket is already connected.
5966 if (_result == OS_ERR && errno == EINTR) {
5967 // restarting a connect() changes its errno semantics
5968 RESTARTABLE(::connect(fd, him, len), _result);
5969 // undo these changes
5970 if (_result == OS_ERR) {
5971 if (errno == EALREADY) {
5972 errno = EINPROGRESS; // fall through
5973 } else if (errno == EISCONN) {
5974 errno = 0;
5975 return OS_OK;
5976 }
5977 }
5978 }
5979 return _result;
5980 }
5981
5982 // Get the default path to the core file
5983 // Returns the length of the string
5984 int os::get_core_path(char* buffer, size_t bufferSize) {
5985 const char* p = get_current_directory(buffer, bufferSize);
5986
5987 if (p == NULL) {
5988 assert(p != NULL, "failed to get current directory");
5989 return 0;
5990 }
5991
5992 jio_snprintf(buffer, bufferSize, "%s/core or core.%d",
5993 p, current_process_id());
5994
5995 return strlen(buffer);
5996 }
5997
5998 #ifndef PRODUCT
5999 void TestReserveMemorySpecial_test() {
6000 // No tests available for this platform
6001 }
6002 #endif