1 /*
2 * Copyright (c) 1997, 2012, 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 "interpreter/interpreter.hpp"
33 #include "jvm_solaris.h"
34 #include "memory/allocation.inline.hpp"
35 #include "memory/filemap.hpp"
36 #include "mutex_solaris.inline.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "os_share_solaris.hpp"
39 #include "prims/jniFastGetField.hpp"
40 #include "prims/jvm.h"
41 #include "prims/jvm_misc.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/extendedPC.hpp"
44 #include "runtime/globals.hpp"
45 #include "runtime/interfaceSupport.hpp"
46 #include "runtime/java.hpp"
47 #include "runtime/javaCalls.hpp"
48 #include "runtime/mutexLocker.hpp"
49 #include "runtime/objectMonitor.hpp"
50 #include "runtime/osThread.hpp"
51 #include "runtime/perfMemory.hpp"
52 #include "runtime/sharedRuntime.hpp"
53 #include "runtime/statSampler.hpp"
54 #include "runtime/stubRoutines.hpp"
55 #include "runtime/threadCritical.hpp"
56 #include "runtime/timer.hpp"
57 #include "services/attachListener.hpp"
58 #include "services/memTracker.hpp"
59 #include "services/runtimeService.hpp"
60 #include "thread_solaris.inline.hpp"
61 #include "utilities/decoder.hpp"
62 #include "utilities/defaultStream.hpp"
63 #include "utilities/events.hpp"
64 #include "utilities/growableArray.hpp"
65 #include "utilities/vmError.hpp"
66 #ifdef TARGET_ARCH_x86
67 # include "assembler_x86.inline.hpp"
68 # include "nativeInst_x86.hpp"
69 #endif
70 #ifdef TARGET_ARCH_sparc
71 # include "assembler_sparc.inline.hpp"
72 # include "nativeInst_sparc.hpp"
73 #endif
74
75 // put OS-includes here
76 # include <dlfcn.h>
77 # include <errno.h>
78 # include <exception>
79 # include <link.h>
80 # include <poll.h>
81 # include <pthread.h>
82 # include <pwd.h>
83 # include <schedctl.h>
84 # include <setjmp.h>
85 # include <signal.h>
86 # include <stdio.h>
87 # include <alloca.h>
88 # include <sys/filio.h>
89 # include <sys/ipc.h>
90 # include <sys/lwp.h>
91 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
92 # include <sys/mman.h>
93 # include <sys/processor.h>
94 # include <sys/procset.h>
95 # include <sys/pset.h>
96 # include <sys/resource.h>
97 # include <sys/shm.h>
98 # include <sys/socket.h>
99 # include <sys/stat.h>
100 # include <sys/systeminfo.h>
101 # include <sys/time.h>
102 # include <sys/times.h>
103 # include <sys/types.h>
104 # include <sys/wait.h>
105 # include <sys/utsname.h>
106 # include <thread.h>
107 # include <unistd.h>
108 # include <sys/priocntl.h>
109 # include <sys/rtpriocntl.h>
110 # include <sys/tspriocntl.h>
111 # include <sys/iapriocntl.h>
112 # include <sys/fxpriocntl.h>
113 # include <sys/loadavg.h>
114 # include <string.h>
115 # include <stdio.h>
116
117 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
118 # include <sys/procfs.h> // see comment in <sys/procfs.h>
119
120 #define MAX_PATH (2 * K)
121
122 // for timer info max values which include all bits
123 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
124
125 #ifdef _GNU_SOURCE
126 // See bug #6514594
127 extern "C" int madvise(caddr_t, size_t, int);
128 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg,
129 int attr, int mask);
130 #endif //_GNU_SOURCE
131
132 /*
133 MPSS Changes Start.
134 The JVM binary needs to be built and run on pre-Solaris 9
135 systems, but the constants needed by MPSS are only in Solaris 9
136 header files. They are textually replicated here to allow
137 building on earlier systems. Once building on Solaris 8 is
138 no longer a requirement, these #defines can be replaced by ordinary
139 system .h inclusion.
140
141 In earlier versions of the JDK and Solaris, we used ISM for large pages.
142 But ISM requires shared memory to achieve this and thus has many caveats.
143 MPSS is a fully transparent and is a cleaner way to get large pages.
144 Although we still require keeping ISM for backward compatiblitiy as well as
145 giving the opportunity to use large pages on older systems it is
146 recommended that MPSS be used for Solaris 9 and above.
147
148 */
149
150 #ifndef MC_HAT_ADVISE
151
152 struct memcntl_mha {
153 uint_t mha_cmd; /* command(s) */
154 uint_t mha_flags;
155 size_t mha_pagesize;
156 };
157 #define MC_HAT_ADVISE 7 /* advise hat map size */
158 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */
159 #define MAP_ALIGN 0x200 /* addr specifies alignment */
160
161 #endif
162 // MPSS Changes End.
163
164
165 // Here are some liblgrp types from sys/lgrp_user.h to be able to
166 // compile on older systems without this header file.
167
168 #ifndef MADV_ACCESS_LWP
169 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
170 #endif
171 #ifndef MADV_ACCESS_MANY
172 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */
173 #endif
174
175 #ifndef LGRP_RSRC_CPU
176 # define LGRP_RSRC_CPU 0 /* CPU resources */
177 #endif
178 #ifndef LGRP_RSRC_MEM
179 # define LGRP_RSRC_MEM 1 /* memory resources */
180 #endif
181
182 // Some more macros from sys/mman.h that are not present in Solaris 8.
183
184 #ifndef MAX_MEMINFO_CNT
185 /*
186 * info_req request type definitions for meminfo
187 * request types starting with MEMINFO_V are used for Virtual addresses
188 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical
189 * addresses
190 */
191 # define MEMINFO_SHIFT 16
192 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT)
193 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */
194 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */
195 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */
196 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */
197 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */
198 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */
199 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */
200
201 /* maximum number of addresses meminfo() can process at a time */
202 # define MAX_MEMINFO_CNT 256
203
204 /* maximum number of request types */
205 # define MAX_MEMINFO_REQ 31
206 #endif
207
208 // see thr_setprio(3T) for the basis of these numbers
209 #define MinimumPriority 0
210 #define NormalPriority 64
211 #define MaximumPriority 127
212
213 // Values for ThreadPriorityPolicy == 1
214 int prio_policy1[CriticalPriority+1] = {
215 -99999, 0, 16, 32, 48, 64,
216 80, 96, 112, 124, 127, 127 };
217
218 // System parameters used internally
219 static clock_t clock_tics_per_sec = 100;
220
221 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
222 static bool enabled_extended_FILE_stdio = false;
223
224 // For diagnostics to print a message once. see run_periodic_checks
225 static bool check_addr0_done = false;
226 static sigset_t check_signal_done;
227 static bool check_signals = true;
228
229 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
230 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
231
232 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
233
234
235 // "default" initializers for missing libc APIs
236 extern "C" {
237 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
238 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
239
240 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
241 static int lwp_cond_destroy(cond_t *cv) { return 0; }
242 }
243
244 // "default" initializers for pthread-based synchronization
245 extern "C" {
246 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
247 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
248 }
249
250 // Thread Local Storage
251 // This is common to all Solaris platforms so it is defined here,
252 // in this common file.
253 // The declarations are in the os_cpu threadLS*.hpp files.
254 //
255 // Static member initialization for TLS
256 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
257
258 #ifndef PRODUCT
259 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
260
261 int ThreadLocalStorage::_tcacheHit = 0;
262 int ThreadLocalStorage::_tcacheMiss = 0;
263
264 void ThreadLocalStorage::print_statistics() {
265 int total = _tcacheMiss+_tcacheHit;
266 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
267 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
268 }
269 #undef _PCT
270 #endif // PRODUCT
271
272 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
273 int index) {
274 Thread *thread = get_thread_slow();
275 if (thread != NULL) {
276 address sp = os::current_stack_pointer();
277 guarantee(thread->_stack_base == NULL ||
278 (sp <= thread->_stack_base &&
279 sp >= thread->_stack_base - thread->_stack_size) ||
280 is_error_reported(),
281 "sp must be inside of selected thread stack");
282
283 thread->set_self_raw_id(raw_id); // mark for quick retrieval
284 _get_thread_cache[ index ] = thread;
285 }
286 return thread;
287 }
288
289
290 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0};
291 #define NO_CACHED_THREAD ((Thread*)all_zero)
292
293 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
294
295 // Store the new value before updating the cache to prevent a race
296 // between get_thread_via_cache_slowly() and this store operation.
297 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
298
299 // Update thread cache with new thread if setting on thread create,
300 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
301 uintptr_t raw = pd_raw_thread_id();
302 int ix = pd_cache_index(raw);
303 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
304 }
305
306 void ThreadLocalStorage::pd_init() {
307 for (int i = 0; i < _pd_cache_size; i++) {
308 _get_thread_cache[i] = NO_CACHED_THREAD;
309 }
310 }
311
312 // Invalidate all the caches (happens to be the same as pd_init).
313 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
314
315 #undef NO_CACHED_THREAD
316
317 // END Thread Local Storage
318
319 static inline size_t adjust_stack_size(address base, size_t size) {
320 if ((ssize_t)size < 0) {
321 // 4759953: Compensate for ridiculous stack size.
322 size = max_intx;
323 }
324 if (size > (size_t)base) {
325 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
326 size = (size_t)base;
327 }
328 return size;
329 }
330
331 static inline stack_t get_stack_info() {
332 stack_t st;
333 int retval = thr_stksegment(&st);
334 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
335 assert(retval == 0, "incorrect return value from thr_stksegment");
336 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
337 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
338 return st;
339 }
340
341 address os::current_stack_base() {
342 int r = thr_main() ;
343 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
344 bool is_primordial_thread = r;
345
346 // Workaround 4352906, avoid calls to thr_stksegment by
347 // thr_main after the first one (it looks like we trash
348 // some data, causing the value for ss_sp to be incorrect).
349 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
350 stack_t st = get_stack_info();
351 if (is_primordial_thread) {
352 // cache initial value of stack base
353 os::Solaris::_main_stack_base = (address)st.ss_sp;
354 }
355 return (address)st.ss_sp;
356 } else {
357 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
358 return os::Solaris::_main_stack_base;
359 }
360 }
361
362 size_t os::current_stack_size() {
363 size_t size;
364
365 int r = thr_main() ;
366 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
367 if(!r) {
368 size = get_stack_info().ss_size;
369 } else {
370 struct rlimit limits;
371 getrlimit(RLIMIT_STACK, &limits);
372 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
373 }
374 // base may not be page aligned
375 address base = current_stack_base();
376 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
377 return (size_t)(base - bottom);
378 }
379
380 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
381 return localtime_r(clock, res);
382 }
383
384 // interruptible infrastructure
385
386 // setup_interruptible saves the thread state before going into an
387 // interruptible system call.
388 // The saved state is used to restore the thread to
389 // its former state whether or not an interrupt is received.
390 // Used by classloader os::read
391 // os::restartable_read calls skip this layer and stay in _thread_in_native
392
393 void os::Solaris::setup_interruptible(JavaThread* thread) {
394
395 JavaThreadState thread_state = thread->thread_state();
396
397 assert(thread_state != _thread_blocked, "Coming from the wrong thread");
398 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible");
399 OSThread* osthread = thread->osthread();
400 osthread->set_saved_interrupt_thread_state(thread_state);
401 thread->frame_anchor()->make_walkable(thread);
402 ThreadStateTransition::transition(thread, thread_state, _thread_blocked);
403 }
404
405 // Version of setup_interruptible() for threads that are already in
406 // _thread_blocked. Used by os_sleep().
407 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) {
408 thread->frame_anchor()->make_walkable(thread);
409 }
410
411 JavaThread* os::Solaris::setup_interruptible() {
412 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
413 setup_interruptible(thread);
414 return thread;
415 }
416
417 void os::Solaris::try_enable_extended_io() {
418 typedef int (*enable_extended_FILE_stdio_t)(int, int);
419
420 if (!UseExtendedFileIO) {
421 return;
422 }
423
424 enable_extended_FILE_stdio_t enabler =
425 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
426 "enable_extended_FILE_stdio");
427 if (enabler) {
428 enabler(-1, -1);
429 }
430 }
431
432
433 #ifdef ASSERT
434
435 JavaThread* os::Solaris::setup_interruptible_native() {
436 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
437 JavaThreadState thread_state = thread->thread_state();
438 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
439 return thread;
440 }
441
442 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) {
443 JavaThreadState thread_state = thread->thread_state();
444 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
445 }
446 #endif
447
448 // cleanup_interruptible reverses the effects of setup_interruptible
449 // setup_interruptible_already_blocked() does not need any cleanup.
450
451 void os::Solaris::cleanup_interruptible(JavaThread* thread) {
452 OSThread* osthread = thread->osthread();
453
454 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state());
455 }
456
457 // I/O interruption related counters called in _INTERRUPTIBLE
458
459 void os::Solaris::bump_interrupted_before_count() {
460 RuntimeService::record_interrupted_before_count();
461 }
462
463 void os::Solaris::bump_interrupted_during_count() {
464 RuntimeService::record_interrupted_during_count();
465 }
466
467 static int _processors_online = 0;
468
469 jint os::Solaris::_os_thread_limit = 0;
470 volatile jint os::Solaris::_os_thread_count = 0;
471
472 julong os::available_memory() {
473 return Solaris::available_memory();
474 }
475
476 julong os::Solaris::available_memory() {
477 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
478 }
479
480 julong os::Solaris::_physical_memory = 0;
481
482 julong os::physical_memory() {
483 return Solaris::physical_memory();
484 }
485
486 julong os::allocatable_physical_memory(julong size) {
487 #ifdef _LP64
488 return size;
489 #else
490 julong result = MIN2(size, (julong)3835*M);
491 if (!is_allocatable(result)) {
492 // Memory allocations will be aligned but the alignment
493 // is not known at this point. Alignments will
494 // be at most to LargePageSizeInBytes. Protect
495 // allocations from alignments up to illegal
496 // values. If at this point 2G is illegal.
497 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes;
498 result = MIN2(size, reasonable_size);
499 }
500 return result;
501 #endif
502 }
503
504 static hrtime_t first_hrtime = 0;
505 static const hrtime_t hrtime_hz = 1000*1000*1000;
506 const int LOCK_BUSY = 1;
507 const int LOCK_FREE = 0;
508 const int LOCK_INVALID = -1;
509 static volatile hrtime_t max_hrtime = 0;
510 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress
511
512
513 void os::Solaris::initialize_system_info() {
514 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
515 _processors_online = sysconf (_SC_NPROCESSORS_ONLN);
516 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
517 }
518
519 int os::active_processor_count() {
520 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
521 pid_t pid = getpid();
522 psetid_t pset = PS_NONE;
523 // Are we running in a processor set or is there any processor set around?
524 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
525 uint_t pset_cpus;
526 // Query the number of cpus available to us.
527 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
528 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
529 _processors_online = pset_cpus;
530 return pset_cpus;
531 }
532 }
533 // Otherwise return number of online cpus
534 return online_cpus;
535 }
536
537 static bool find_processors_in_pset(psetid_t pset,
538 processorid_t** id_array,
539 uint_t* id_length) {
540 bool result = false;
541 // Find the number of processors in the processor set.
542 if (pset_info(pset, NULL, id_length, NULL) == 0) {
543 // Make up an array to hold their ids.
544 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
545 // Fill in the array with their processor ids.
546 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
547 result = true;
548 }
549 }
550 return result;
551 }
552
553 // Callers of find_processors_online() must tolerate imprecise results --
554 // the system configuration can change asynchronously because of DR
555 // or explicit psradm operations.
556 //
557 // We also need to take care that the loop (below) terminates as the
558 // number of processors online can change between the _SC_NPROCESSORS_ONLN
559 // request and the loop that builds the list of processor ids. Unfortunately
560 // there's no reliable way to determine the maximum valid processor id,
561 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
562 // man pages, which claim the processor id set is "sparse, but
563 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
564 // exit the loop.
565 //
566 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
567 // not available on S8.0.
568
569 static bool find_processors_online(processorid_t** id_array,
570 uint* id_length) {
571 const processorid_t MAX_PROCESSOR_ID = 100000 ;
572 // Find the number of processors online.
573 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
574 // Make up an array to hold their ids.
575 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
576 // Processors need not be numbered consecutively.
577 long found = 0;
578 processorid_t next = 0;
579 while (found < *id_length && next < MAX_PROCESSOR_ID) {
580 processor_info_t info;
581 if (processor_info(next, &info) == 0) {
582 // NB, PI_NOINTR processors are effectively online ...
583 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
584 (*id_array)[found] = next;
585 found += 1;
586 }
587 }
588 next += 1;
589 }
590 if (found < *id_length) {
591 // The loop above didn't identify the expected number of processors.
592 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
593 // and re-running the loop, above, but there's no guarantee of progress
594 // if the system configuration is in flux. Instead, we just return what
595 // we've got. Note that in the worst case find_processors_online() could
596 // return an empty set. (As a fall-back in the case of the empty set we
597 // could just return the ID of the current processor).
598 *id_length = found ;
599 }
600
601 return true;
602 }
603
604 static bool assign_distribution(processorid_t* id_array,
605 uint id_length,
606 uint* distribution,
607 uint distribution_length) {
608 // We assume we can assign processorid_t's to uint's.
609 assert(sizeof(processorid_t) == sizeof(uint),
610 "can't convert processorid_t to uint");
611 // Quick check to see if we won't succeed.
612 if (id_length < distribution_length) {
613 return false;
614 }
615 // Assign processor ids to the distribution.
616 // Try to shuffle processors to distribute work across boards,
617 // assuming 4 processors per board.
618 const uint processors_per_board = ProcessDistributionStride;
619 // Find the maximum processor id.
620 processorid_t max_id = 0;
621 for (uint m = 0; m < id_length; m += 1) {
622 max_id = MAX2(max_id, id_array[m]);
623 }
624 // The next id, to limit loops.
625 const processorid_t limit_id = max_id + 1;
626 // Make up markers for available processors.
627 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
628 for (uint c = 0; c < limit_id; c += 1) {
629 available_id[c] = false;
630 }
631 for (uint a = 0; a < id_length; a += 1) {
632 available_id[id_array[a]] = true;
633 }
634 // Step by "boards", then by "slot", copying to "assigned".
635 // NEEDS_CLEANUP: The assignment of processors should be stateful,
636 // remembering which processors have been assigned by
637 // previous calls, etc., so as to distribute several
638 // independent calls of this method. What we'd like is
639 // It would be nice to have an API that let us ask
640 // how many processes are bound to a processor,
641 // but we don't have that, either.
642 // In the short term, "board" is static so that
643 // subsequent distributions don't all start at board 0.
644 static uint board = 0;
645 uint assigned = 0;
646 // Until we've found enough processors ....
647 while (assigned < distribution_length) {
648 // ... find the next available processor in the board.
649 for (uint slot = 0; slot < processors_per_board; slot += 1) {
650 uint try_id = board * processors_per_board + slot;
651 if ((try_id < limit_id) && (available_id[try_id] == true)) {
652 distribution[assigned] = try_id;
653 available_id[try_id] = false;
654 assigned += 1;
655 break;
656 }
657 }
658 board += 1;
659 if (board * processors_per_board + 0 >= limit_id) {
660 board = 0;
661 }
662 }
663 if (available_id != NULL) {
664 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal);
665 }
666 return true;
667 }
668
669 void os::set_native_thread_name(const char *name) {
670 // Not yet implemented.
671 return;
672 }
673
674 bool os::distribute_processes(uint length, uint* distribution) {
675 bool result = false;
676 // Find the processor id's of all the available CPUs.
677 processorid_t* id_array = NULL;
678 uint id_length = 0;
679 // There are some races between querying information and using it,
680 // since processor sets can change dynamically.
681 psetid_t pset = PS_NONE;
682 // Are we running in a processor set?
683 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
684 result = find_processors_in_pset(pset, &id_array, &id_length);
685 } else {
686 result = find_processors_online(&id_array, &id_length);
687 }
688 if (result == true) {
689 if (id_length >= length) {
690 result = assign_distribution(id_array, id_length, distribution, length);
691 } else {
692 result = false;
693 }
694 }
695 if (id_array != NULL) {
696 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal);
697 }
698 return result;
699 }
700
701 bool os::bind_to_processor(uint processor_id) {
702 // We assume that a processorid_t can be stored in a uint.
703 assert(sizeof(uint) == sizeof(processorid_t),
704 "can't convert uint to processorid_t");
705 int bind_result =
706 processor_bind(P_LWPID, // bind LWP.
707 P_MYID, // bind current LWP.
708 (processorid_t) processor_id, // id.
709 NULL); // don't return old binding.
710 return (bind_result == 0);
711 }
712
713 bool os::getenv(const char* name, char* buffer, int len) {
714 char* val = ::getenv( name );
715 if ( val == NULL
716 || strlen(val) + 1 > len ) {
717 if (len > 0) buffer[0] = 0; // return a null string
718 return false;
719 }
720 strcpy( buffer, val );
721 return true;
722 }
723
724
725 // Return true if user is running as root.
726
727 bool os::have_special_privileges() {
728 static bool init = false;
729 static bool privileges = false;
730 if (!init) {
731 privileges = (getuid() != geteuid()) || (getgid() != getegid());
732 init = true;
733 }
734 return privileges;
735 }
736
737
738 void os::init_system_properties_values() {
739 char arch[12];
740 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch));
741
742 // The next steps are taken in the product version:
743 //
744 // Obtain the JAVA_HOME value from the location of libjvm[_g].so.
745 // This library should be located at:
746 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so.
747 //
748 // If "/jre/lib/" appears at the right place in the path, then we
749 // assume libjvm[_g].so is installed in a JDK and we use this path.
750 //
751 // Otherwise exit with message: "Could not create the Java virtual machine."
752 //
753 // The following extra steps are taken in the debugging version:
754 //
755 // If "/jre/lib/" does NOT appear at the right place in the path
756 // instead of exit check for $JAVA_HOME environment variable.
757 //
758 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
759 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so
760 // it looks like libjvm[_g].so is installed there
761 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so.
762 //
763 // Otherwise exit.
764 //
765 // Important note: if the location of libjvm.so changes this
766 // code needs to be changed accordingly.
767
768 // The next few definitions allow the code to be verbatim:
769 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal)
770 #define free(p) FREE_C_HEAP_ARRAY(char, p, mtInternal)
771 #define getenv(n) ::getenv(n)
772
773 #define EXTENSIONS_DIR "/lib/ext"
774 #define ENDORSED_DIR "/lib/endorsed"
775 #define COMMON_DIR "/usr/jdk/packages"
776
777 {
778 /* sysclasspath, java_home, dll_dir */
779 {
780 char *home_path;
781 char *dll_path;
782 char *pslash;
783 char buf[MAXPATHLEN];
784 os::jvm_path(buf, sizeof(buf));
785
786 // Found the full path to libjvm.so.
787 // Now cut the path to <java_home>/jre if we can.
788 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */
789 pslash = strrchr(buf, '/');
790 if (pslash != NULL)
791 *pslash = '\0'; /* get rid of /{client|server|hotspot} */
792 dll_path = malloc(strlen(buf) + 1);
793 if (dll_path == NULL)
794 return;
795 strcpy(dll_path, buf);
796 Arguments::set_dll_dir(dll_path);
797
798 if (pslash != NULL) {
799 pslash = strrchr(buf, '/');
800 if (pslash != NULL) {
801 *pslash = '\0'; /* get rid of /<arch> */
802 pslash = strrchr(buf, '/');
803 if (pslash != NULL)
804 *pslash = '\0'; /* get rid of /lib */
805 }
806 }
807
808 home_path = malloc(strlen(buf) + 1);
809 if (home_path == NULL)
810 return;
811 strcpy(home_path, buf);
812 Arguments::set_java_home(home_path);
813
814 if (!set_boot_path('/', ':'))
815 return;
816 }
817
818 /*
819 * Where to look for native libraries
820 */
821 {
822 // Use dlinfo() to determine the correct java.library.path.
823 //
824 // If we're launched by the Java launcher, and the user
825 // does not set java.library.path explicitly on the commandline,
826 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
827 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
828 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
829 // /usr/lib), which is exactly what we want.
830 //
831 // If the user does set java.library.path, it completely
832 // overwrites this setting, and always has.
833 //
834 // If we're not launched by the Java launcher, we may
835 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
836 // settings. Again, dlinfo does exactly what we want.
837
838 Dl_serinfo _info, *info = &_info;
839 Dl_serpath *path;
840 char* library_path;
841 char *common_path;
842 int i;
843
844 // determine search path count and required buffer size
845 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
846 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
847 }
848
849 // allocate new buffer and initialize
850 info = (Dl_serinfo*)malloc(_info.dls_size);
851 if (info == NULL) {
852 vm_exit_out_of_memory(_info.dls_size,
853 "init_system_properties_values info");
854 }
855 info->dls_size = _info.dls_size;
856 info->dls_cnt = _info.dls_cnt;
857
858 // obtain search path information
859 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
860 free(info);
861 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
862 }
863
864 path = &info->dls_serpath[0];
865
866 // Note: Due to a legacy implementation, most of the library path
867 // is set in the launcher. This was to accomodate linking restrictions
868 // on legacy Solaris implementations (which are no longer supported).
869 // Eventually, all the library path setting will be done here.
870 //
871 // However, to prevent the proliferation of improperly built native
872 // libraries, the new path component /usr/jdk/packages is added here.
873
874 // Determine the actual CPU architecture.
875 char cpu_arch[12];
876 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
877 #ifdef _LP64
878 // If we are a 64-bit vm, perform the following translations:
879 // sparc -> sparcv9
880 // i386 -> amd64
881 if (strcmp(cpu_arch, "sparc") == 0)
882 strcat(cpu_arch, "v9");
883 else if (strcmp(cpu_arch, "i386") == 0)
884 strcpy(cpu_arch, "amd64");
885 #endif
886
887 // Construct the invariant part of ld_library_path. Note that the
888 // space for the colon and the trailing null are provided by the
889 // nulls included by the sizeof operator.
890 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch);
891 common_path = malloc(bufsize);
892 if (common_path == NULL) {
893 free(info);
894 vm_exit_out_of_memory(bufsize,
895 "init_system_properties_values common_path");
896 }
897 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch);
898
899 // struct size is more than sufficient for the path components obtained
900 // through the dlinfo() call, so only add additional space for the path
901 // components explicitly added here.
902 bufsize = info->dls_size + strlen(common_path);
903 library_path = malloc(bufsize);
904 if (library_path == NULL) {
905 free(info);
906 free(common_path);
907 vm_exit_out_of_memory(bufsize,
908 "init_system_properties_values library_path");
909 }
910 library_path[0] = '\0';
911
912 // Construct the desired Java library path from the linker's library
913 // search path.
914 //
915 // For compatibility, it is optimal that we insert the additional path
916 // components specific to the Java VM after those components specified
917 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
918 // infrastructure.
919 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it
920 strcpy(library_path, common_path);
921 } else {
922 int inserted = 0;
923 for (i = 0; i < info->dls_cnt; i++, path++) {
924 uint_t flags = path->dls_flags & LA_SER_MASK;
925 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
926 strcat(library_path, common_path);
927 strcat(library_path, os::path_separator());
928 inserted = 1;
929 }
930 strcat(library_path, path->dls_name);
931 strcat(library_path, os::path_separator());
932 }
933 // eliminate trailing path separator
934 library_path[strlen(library_path)-1] = '\0';
935 }
936
937 // happens before argument parsing - can't use a trace flag
938 // tty->print_raw("init_system_properties_values: native lib path: ");
939 // tty->print_raw_cr(library_path);
940
941 // callee copies into its own buffer
942 Arguments::set_library_path(library_path);
943
944 free(common_path);
945 free(library_path);
946 free(info);
947 }
948
949 /*
950 * Extensions directories.
951 *
952 * Note that the space for the colon and the trailing null are provided
953 * by the nulls included by the sizeof operator (so actually one byte more
954 * than necessary is allocated).
955 */
956 {
957 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) +
958 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) +
959 sizeof(EXTENSIONS_DIR));
960 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR,
961 Arguments::get_java_home());
962 Arguments::set_ext_dirs(buf);
963 }
964
965 /* Endorsed standards default directory. */
966 {
967 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR));
968 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
969 Arguments::set_endorsed_dirs(buf);
970 }
971 }
972
973 #undef malloc
974 #undef free
975 #undef getenv
976 #undef EXTENSIONS_DIR
977 #undef ENDORSED_DIR
978 #undef COMMON_DIR
979
980 }
981
982 void os::breakpoint() {
983 BREAKPOINT;
984 }
985
986 bool os::obsolete_option(const JavaVMOption *option)
987 {
988 if (!strncmp(option->optionString, "-Xt", 3)) {
989 return true;
990 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
991 return true;
992 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
993 return true;
994 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
995 return true;
996 }
997 return false;
998 }
999
1000 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
1001 address stackStart = (address)thread->stack_base();
1002 address stackEnd = (address)(stackStart - (address)thread->stack_size());
1003 if (sp < stackStart && sp >= stackEnd ) return true;
1004 return false;
1005 }
1006
1007 extern "C" void breakpoint() {
1008 // use debugger to set breakpoint here
1009 }
1010
1011 static thread_t main_thread;
1012
1013 // Thread start routine for all new Java threads
1014 extern "C" void* java_start(void* thread_addr) {
1015 // Try to randomize the cache line index of hot stack frames.
1016 // This helps when threads of the same stack traces evict each other's
1017 // cache lines. The threads can be either from the same JVM instance, or
1018 // from different JVM instances. The benefit is especially true for
1019 // processors with hyperthreading technology.
1020 static int counter = 0;
1021 int pid = os::current_process_id();
1022 alloca(((pid ^ counter++) & 7) * 128);
1023
1024 int prio;
1025 Thread* thread = (Thread*)thread_addr;
1026 OSThread* osthr = thread->osthread();
1027
1028 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound
1029 thread->_schedctl = (void *) schedctl_init () ;
1030
1031 if (UseNUMA) {
1032 int lgrp_id = os::numa_get_group_id();
1033 if (lgrp_id != -1) {
1034 thread->set_lgrp_id(lgrp_id);
1035 }
1036 }
1037
1038 // If the creator called set priority before we started,
1039 // we need to call set_native_priority now that we have an lwp.
1040 // We used to get the priority from thr_getprio (we called
1041 // thr_setprio way back in create_thread) and pass it to
1042 // set_native_priority, but Solaris scales the priority
1043 // in java_to_os_priority, so when we read it back here,
1044 // we pass trash to set_native_priority instead of what's
1045 // in java_to_os_priority. So we save the native priority
1046 // in the osThread and recall it here.
1047
1048 if ( osthr->thread_id() != -1 ) {
1049 if ( UseThreadPriorities ) {
1050 int prio = osthr->native_priority();
1051 if (ThreadPriorityVerbose) {
1052 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
1053 INTPTR_FORMAT ", setting priority: %d\n",
1054 osthr->thread_id(), osthr->lwp_id(), prio);
1055 }
1056 os::set_native_priority(thread, prio);
1057 }
1058 } else if (ThreadPriorityVerbose) {
1059 warning("Can't set priority in _start routine, thread id hasn't been set\n");
1060 }
1061
1062 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
1063
1064 // initialize signal mask for this thread
1065 os::Solaris::hotspot_sigmask(thread);
1066
1067 thread->run();
1068
1069 // One less thread is executing
1070 // When the VMThread gets here, the main thread may have already exited
1071 // which frees the CodeHeap containing the Atomic::dec code
1072 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
1073 Atomic::dec(&os::Solaris::_os_thread_count);
1074 }
1075
1076 if (UseDetachedThreads) {
1077 thr_exit(NULL);
1078 ShouldNotReachHere();
1079 }
1080 return NULL;
1081 }
1082
1083 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
1084 // Allocate the OSThread object
1085 OSThread* osthread = new OSThread(NULL, NULL);
1086 if (osthread == NULL) return NULL;
1087
1088 // Store info on the Solaris thread into the OSThread
1089 osthread->set_thread_id(thread_id);
1090 osthread->set_lwp_id(_lwp_self());
1091 thread->_schedctl = (void *) schedctl_init () ;
1092
1093 if (UseNUMA) {
1094 int lgrp_id = os::numa_get_group_id();
1095 if (lgrp_id != -1) {
1096 thread->set_lgrp_id(lgrp_id);
1097 }
1098 }
1099
1100 if ( ThreadPriorityVerbose ) {
1101 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
1102 osthread->thread_id(), osthread->lwp_id() );
1103 }
1104
1105 // Initial thread state is INITIALIZED, not SUSPENDED
1106 osthread->set_state(INITIALIZED);
1107
1108 return osthread;
1109 }
1110
1111 void os::Solaris::hotspot_sigmask(Thread* thread) {
1112
1113 //Save caller's signal mask
1114 sigset_t sigmask;
1115 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
1116 OSThread *osthread = thread->osthread();
1117 osthread->set_caller_sigmask(sigmask);
1118
1119 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
1120 if (!ReduceSignalUsage) {
1121 if (thread->is_VM_thread()) {
1122 // Only the VM thread handles BREAK_SIGNAL ...
1123 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
1124 } else {
1125 // ... all other threads block BREAK_SIGNAL
1126 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
1127 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
1128 }
1129 }
1130 }
1131
1132 bool os::create_attached_thread(JavaThread* thread) {
1133 #ifdef ASSERT
1134 thread->verify_not_published();
1135 #endif
1136 OSThread* osthread = create_os_thread(thread, thr_self());
1137 if (osthread == NULL) {
1138 return false;
1139 }
1140
1141 // Initial thread state is RUNNABLE
1142 osthread->set_state(RUNNABLE);
1143 thread->set_osthread(osthread);
1144
1145 // initialize signal mask for this thread
1146 // and save the caller's signal mask
1147 os::Solaris::hotspot_sigmask(thread);
1148
1149 return true;
1150 }
1151
1152 bool os::create_main_thread(JavaThread* thread) {
1153 #ifdef ASSERT
1154 thread->verify_not_published();
1155 #endif
1156 if (_starting_thread == NULL) {
1157 _starting_thread = create_os_thread(thread, main_thread);
1158 if (_starting_thread == NULL) {
1159 return false;
1160 }
1161 }
1162
1163 // The primodial thread is runnable from the start
1164 _starting_thread->set_state(RUNNABLE);
1165
1166 thread->set_osthread(_starting_thread);
1167
1168 // initialize signal mask for this thread
1169 // and save the caller's signal mask
1170 os::Solaris::hotspot_sigmask(thread);
1171
1172 return true;
1173 }
1174
1175 // _T2_libthread is true if we believe we are running with the newer
1176 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default)
1177 bool os::Solaris::_T2_libthread = false;
1178
1179 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
1180 // Allocate the OSThread object
1181 OSThread* osthread = new OSThread(NULL, NULL);
1182 if (osthread == NULL) {
1183 return false;
1184 }
1185
1186 if ( ThreadPriorityVerbose ) {
1187 char *thrtyp;
1188 switch ( thr_type ) {
1189 case vm_thread:
1190 thrtyp = (char *)"vm";
1191 break;
1192 case cgc_thread:
1193 thrtyp = (char *)"cgc";
1194 break;
1195 case pgc_thread:
1196 thrtyp = (char *)"pgc";
1197 break;
1198 case java_thread:
1199 thrtyp = (char *)"java";
1200 break;
1201 case compiler_thread:
1202 thrtyp = (char *)"compiler";
1203 break;
1204 case watcher_thread:
1205 thrtyp = (char *)"watcher";
1206 break;
1207 default:
1208 thrtyp = (char *)"unknown";
1209 break;
1210 }
1211 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
1212 }
1213
1214 // Calculate stack size if it's not specified by caller.
1215 if (stack_size == 0) {
1216 // The default stack size 1M (2M for LP64).
1217 stack_size = (BytesPerWord >> 2) * K * K;
1218
1219 switch (thr_type) {
1220 case os::java_thread:
1221 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
1222 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
1223 break;
1224 case os::compiler_thread:
1225 if (CompilerThreadStackSize > 0) {
1226 stack_size = (size_t)(CompilerThreadStackSize * K);
1227 break;
1228 } // else fall through:
1229 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1230 case os::vm_thread:
1231 case os::pgc_thread:
1232 case os::cgc_thread:
1233 case os::watcher_thread:
1234 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1235 break;
1236 }
1237 }
1238 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1239
1240 // Initial state is ALLOCATED but not INITIALIZED
1241 osthread->set_state(ALLOCATED);
1242
1243 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1244 // We got lots of threads. Check if we still have some address space left.
1245 // Need to be at least 5Mb of unreserved address space. We do check by
1246 // trying to reserve some.
1247 const size_t VirtualMemoryBangSize = 20*K*K;
1248 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1249 if (mem == NULL) {
1250 delete osthread;
1251 return false;
1252 } else {
1253 // Release the memory again
1254 os::release_memory(mem, VirtualMemoryBangSize);
1255 }
1256 }
1257
1258 // Setup osthread because the child thread may need it.
1259 thread->set_osthread(osthread);
1260
1261 // Create the Solaris thread
1262 // explicit THR_BOUND for T2_libthread case in case
1263 // that assumption is not accurate, but our alternate signal stack
1264 // handling is based on it which must have bound threads
1265 thread_t tid = 0;
1266 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED
1267 | ((UseBoundThreads || os::Solaris::T2_libthread() ||
1268 (thr_type == vm_thread) ||
1269 (thr_type == cgc_thread) ||
1270 (thr_type == pgc_thread) ||
1271 (thr_type == compiler_thread && BackgroundCompilation)) ?
1272 THR_BOUND : 0);
1273 int status;
1274
1275 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs.
1276 //
1277 // On multiprocessors systems, libthread sometimes under-provisions our
1278 // process with LWPs. On a 30-way systems, for instance, we could have
1279 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned
1280 // to our process. This can result in under utilization of PEs.
1281 // I suspect the problem is related to libthread's LWP
1282 // pool management and to the kernel's SIGBLOCKING "last LWP parked"
1283 // upcall policy.
1284 //
1285 // The following code is palliative -- it attempts to ensure that our
1286 // process has sufficient LWPs to take advantage of multiple PEs.
1287 // Proper long-term cures include using user-level threads bound to LWPs
1288 // (THR_BOUND) or using LWP-based synchronization. Note that there is a
1289 // slight timing window with respect to sampling _os_thread_count, but
1290 // the race is benign. Also, we should periodically recompute
1291 // _processors_online as the min of SC_NPROCESSORS_ONLN and the
1292 // the number of PEs in our partition. You might be tempted to use
1293 // THR_NEW_LWP here, but I'd recommend against it as that could
1294 // result in undesirable growth of the libthread's LWP pool.
1295 // The fix below isn't sufficient; for instance, it doesn't take into count
1296 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks.
1297 //
1298 // Some pathologies this scheme doesn't handle:
1299 // * Threads can block, releasing the LWPs. The LWPs can age out.
1300 // When a large number of threads become ready again there aren't
1301 // enough LWPs available to service them. This can occur when the
1302 // number of ready threads oscillates.
1303 // * LWPs/Threads park on IO, thus taking the LWP out of circulation.
1304 //
1305 // Finally, we should call thr_setconcurrency() periodically to refresh
1306 // the LWP pool and thwart the LWP age-out mechanism.
1307 // The "+3" term provides a little slop -- we want to slightly overprovision.
1308
1309 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) {
1310 if (!(flags & THR_BOUND)) {
1311 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation
1312 }
1313 }
1314 // Although this doesn't hurt, we should warn of undefined behavior
1315 // when using unbound T1 threads with schedctl(). This should never
1316 // happen, as the compiler and VM threads are always created bound
1317 DEBUG_ONLY(
1318 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) &&
1319 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) &&
1320 ((thr_type == vm_thread) || (thr_type == cgc_thread) ||
1321 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) {
1322 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound");
1323 }
1324 );
1325
1326
1327 // Mark that we don't have an lwp or thread id yet.
1328 // In case we attempt to set the priority before the thread starts.
1329 osthread->set_lwp_id(-1);
1330 osthread->set_thread_id(-1);
1331
1332 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1333 if (status != 0) {
1334 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1335 perror("os::create_thread");
1336 }
1337 thread->set_osthread(NULL);
1338 // Need to clean up stuff we've allocated so far
1339 delete osthread;
1340 return false;
1341 }
1342
1343 Atomic::inc(&os::Solaris::_os_thread_count);
1344
1345 // Store info on the Solaris thread into the OSThread
1346 osthread->set_thread_id(tid);
1347
1348 // Remember that we created this thread so we can set priority on it
1349 osthread->set_vm_created();
1350
1351 // Set the default thread priority. If using bound threads, setting
1352 // lwp priority will be delayed until thread start.
1353 set_native_priority(thread,
1354 DefaultThreadPriority == -1 ?
1355 java_to_os_priority[NormPriority] :
1356 DefaultThreadPriority);
1357
1358 // Initial thread state is INITIALIZED, not SUSPENDED
1359 osthread->set_state(INITIALIZED);
1360
1361 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1362 return true;
1363 }
1364
1365 /* defined for >= Solaris 10. This allows builds on earlier versions
1366 * of Solaris to take advantage of the newly reserved Solaris JVM signals
1367 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1368 * and -XX:+UseAltSigs does nothing since these should have no conflict
1369 */
1370 #if !defined(SIGJVM1)
1371 #define SIGJVM1 39
1372 #define SIGJVM2 40
1373 #endif
1374
1375 debug_only(static bool signal_sets_initialized = false);
1376 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1377 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1378 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1379
1380 bool os::Solaris::is_sig_ignored(int sig) {
1381 struct sigaction oact;
1382 sigaction(sig, (struct sigaction*)NULL, &oact);
1383 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1384 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1385 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
1386 return true;
1387 else
1388 return false;
1389 }
1390
1391 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1392 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1393 static bool isJVM1available() {
1394 return SIGJVM1 < SIGRTMIN;
1395 }
1396
1397 void os::Solaris::signal_sets_init() {
1398 // Should also have an assertion stating we are still single-threaded.
1399 assert(!signal_sets_initialized, "Already initialized");
1400 // Fill in signals that are necessarily unblocked for all threads in
1401 // the VM. Currently, we unblock the following signals:
1402 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1403 // by -Xrs (=ReduceSignalUsage));
1404 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1405 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1406 // the dispositions or masks wrt these signals.
1407 // Programs embedding the VM that want to use the above signals for their
1408 // own purposes must, at this time, use the "-Xrs" option to prevent
1409 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1410 // (See bug 4345157, and other related bugs).
1411 // In reality, though, unblocking these signals is really a nop, since
1412 // these signals are not blocked by default.
1413 sigemptyset(&unblocked_sigs);
1414 sigemptyset(&allowdebug_blocked_sigs);
1415 sigaddset(&unblocked_sigs, SIGILL);
1416 sigaddset(&unblocked_sigs, SIGSEGV);
1417 sigaddset(&unblocked_sigs, SIGBUS);
1418 sigaddset(&unblocked_sigs, SIGFPE);
1419
1420 if (isJVM1available) {
1421 os::Solaris::set_SIGinterrupt(SIGJVM1);
1422 os::Solaris::set_SIGasync(SIGJVM2);
1423 } else if (UseAltSigs) {
1424 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1425 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1426 } else {
1427 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1428 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1429 }
1430
1431 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1432 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1433
1434 if (!ReduceSignalUsage) {
1435 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1436 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1437 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1438 }
1439 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1440 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1441 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1442 }
1443 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1444 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1445 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1446 }
1447 }
1448 // Fill in signals that are blocked by all but the VM thread.
1449 sigemptyset(&vm_sigs);
1450 if (!ReduceSignalUsage)
1451 sigaddset(&vm_sigs, BREAK_SIGNAL);
1452 debug_only(signal_sets_initialized = true);
1453
1454 // For diagnostics only used in run_periodic_checks
1455 sigemptyset(&check_signal_done);
1456 }
1457
1458 // These are signals that are unblocked while a thread is running Java.
1459 // (For some reason, they get blocked by default.)
1460 sigset_t* os::Solaris::unblocked_signals() {
1461 assert(signal_sets_initialized, "Not initialized");
1462 return &unblocked_sigs;
1463 }
1464
1465 // These are the signals that are blocked while a (non-VM) thread is
1466 // running Java. Only the VM thread handles these signals.
1467 sigset_t* os::Solaris::vm_signals() {
1468 assert(signal_sets_initialized, "Not initialized");
1469 return &vm_sigs;
1470 }
1471
1472 // These are signals that are blocked during cond_wait to allow debugger in
1473 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1474 assert(signal_sets_initialized, "Not initialized");
1475 return &allowdebug_blocked_sigs;
1476 }
1477
1478
1479 void _handle_uncaught_cxx_exception() {
1480 VMError err("An uncaught C++ exception");
1481 err.report_and_die();
1482 }
1483
1484
1485 // First crack at OS-specific initialization, from inside the new thread.
1486 void os::initialize_thread(Thread* thr) {
1487 int r = thr_main() ;
1488 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
1489 if (r) {
1490 JavaThread* jt = (JavaThread *)thr;
1491 assert(jt != NULL,"Sanity check");
1492 size_t stack_size;
1493 address base = jt->stack_base();
1494 if (Arguments::created_by_java_launcher()) {
1495 // Use 2MB to allow for Solaris 7 64 bit mode.
1496 stack_size = JavaThread::stack_size_at_create() == 0
1497 ? 2048*K : JavaThread::stack_size_at_create();
1498
1499 // There are rare cases when we may have already used more than
1500 // the basic stack size allotment before this method is invoked.
1501 // Attempt to allow for a normally sized java_stack.
1502 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1503 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1504 } else {
1505 // 6269555: If we were not created by a Java launcher, i.e. if we are
1506 // running embedded in a native application, treat the primordial thread
1507 // as much like a native attached thread as possible. This means using
1508 // the current stack size from thr_stksegment(), unless it is too large
1509 // to reliably setup guard pages. A reasonable max size is 8MB.
1510 size_t current_size = current_stack_size();
1511 // This should never happen, but just in case....
1512 if (current_size == 0) current_size = 2 * K * K;
1513 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1514 }
1515 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1516 stack_size = (size_t)(base - bottom);
1517
1518 assert(stack_size > 0, "Stack size calculation problem");
1519
1520 if (stack_size > jt->stack_size()) {
1521 NOT_PRODUCT(
1522 struct rlimit limits;
1523 getrlimit(RLIMIT_STACK, &limits);
1524 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1525 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1526 )
1527 tty->print_cr(
1528 "Stack size of %d Kb exceeds current limit of %d Kb.\n"
1529 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1530 "See limit(1) to increase the stack size limit.",
1531 stack_size / K, jt->stack_size() / K);
1532 vm_exit(1);
1533 }
1534 assert(jt->stack_size() >= stack_size,
1535 "Attempt to map more stack than was allocated");
1536 jt->set_stack_size(stack_size);
1537 }
1538
1539 // 5/22/01: Right now alternate signal stacks do not handle
1540 // throwing stack overflow exceptions, see bug 4463178
1541 // Until a fix is found for this, T2 will NOT imply alternate signal
1542 // stacks.
1543 // If using T2 libthread threads, install an alternate signal stack.
1544 // Because alternate stacks associate with LWPs on Solaris,
1545 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads
1546 // we prefer to explicitly stack bang.
1547 // If not using T2 libthread, but using UseBoundThreads any threads
1548 // (primordial thread, jni_attachCurrentThread) we do not create,
1549 // probably are not bound, therefore they can not have an alternate
1550 // signal stack. Since our stack banging code is generated and
1551 // is shared across threads, all threads must be bound to allow
1552 // using alternate signal stacks. The alternative is to interpose
1553 // on _lwp_create to associate an alt sig stack with each LWP,
1554 // and this could be a problem when the JVM is embedded.
1555 // We would prefer to use alternate signal stacks with T2
1556 // Since there is currently no accurate way to detect T2
1557 // we do not. Assuming T2 when running T1 causes sig 11s or assertions
1558 // on installing alternate signal stacks
1559
1560
1561 // 05/09/03: removed alternate signal stack support for Solaris
1562 // The alternate signal stack mechanism is no longer needed to
1563 // handle stack overflow. This is now handled by allocating
1564 // guard pages (red zone) and stackbanging.
1565 // Initially the alternate signal stack mechanism was removed because
1566 // it did not work with T1 llibthread. Alternate
1567 // signal stacks MUST have all threads bound to lwps. Applications
1568 // can create their own threads and attach them without their being
1569 // bound under T1. This is frequently the case for the primordial thread.
1570 // If we were ever to reenable this mechanism we would need to
1571 // use the dynamic check for T2 libthread.
1572
1573 os::Solaris::init_thread_fpu_state();
1574 std::set_terminate(_handle_uncaught_cxx_exception);
1575 }
1576
1577
1578
1579 // Free Solaris resources related to the OSThread
1580 void os::free_thread(OSThread* osthread) {
1581 assert(osthread != NULL, "os::free_thread but osthread not set");
1582
1583
1584 // We are told to free resources of the argument thread,
1585 // but we can only really operate on the current thread.
1586 // The main thread must take the VMThread down synchronously
1587 // before the main thread exits and frees up CodeHeap
1588 guarantee((Thread::current()->osthread() == osthread
1589 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1590 if (Thread::current()->osthread() == osthread) {
1591 // Restore caller's signal mask
1592 sigset_t sigmask = osthread->caller_sigmask();
1593 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1594 }
1595 delete osthread;
1596 }
1597
1598 void os::pd_start_thread(Thread* thread) {
1599 int status = thr_continue(thread->osthread()->thread_id());
1600 assert_status(status == 0, status, "thr_continue failed");
1601 }
1602
1603
1604 intx os::current_thread_id() {
1605 return (intx)thr_self();
1606 }
1607
1608 static pid_t _initial_pid = 0;
1609
1610 int os::current_process_id() {
1611 return (int)(_initial_pid ? _initial_pid : getpid());
1612 }
1613
1614 int os::allocate_thread_local_storage() {
1615 // %%% in Win32 this allocates a memory segment pointed to by a
1616 // register. Dan Stein can implement a similar feature in
1617 // Solaris. Alternatively, the VM can do the same thing
1618 // explicitly: malloc some storage and keep the pointer in a
1619 // register (which is part of the thread's context) (or keep it
1620 // in TLS).
1621 // %%% In current versions of Solaris, thr_self and TSD can
1622 // be accessed via short sequences of displaced indirections.
1623 // The value of thr_self is available as %g7(36).
1624 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1625 // assuming that the current thread already has a value bound to k.
1626 // It may be worth experimenting with such access patterns,
1627 // and later having the parameters formally exported from a Solaris
1628 // interface. I think, however, that it will be faster to
1629 // maintain the invariant that %g2 always contains the
1630 // JavaThread in Java code, and have stubs simply
1631 // treat %g2 as a caller-save register, preserving it in a %lN.
1632 thread_key_t tk;
1633 if (thr_keycreate( &tk, NULL ) )
1634 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1635 "(%s)", strerror(errno)));
1636 return int(tk);
1637 }
1638
1639 void os::free_thread_local_storage(int index) {
1640 // %%% don't think we need anything here
1641 // if ( pthread_key_delete((pthread_key_t) tk) )
1642 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1643 }
1644
1645 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific
1646 // small number - point is NO swap space available
1647 void os::thread_local_storage_at_put(int index, void* value) {
1648 // %%% this is used only in threadLocalStorage.cpp
1649 if (thr_setspecific((thread_key_t)index, value)) {
1650 if (errno == ENOMEM) {
1651 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space");
1652 } else {
1653 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1654 "(%s)", strerror(errno)));
1655 }
1656 } else {
1657 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ;
1658 }
1659 }
1660
1661 // This function could be called before TLS is initialized, for example, when
1662 // VM receives an async signal or when VM causes a fatal error during
1663 // initialization. Return NULL if thr_getspecific() fails.
1664 void* os::thread_local_storage_at(int index) {
1665 // %%% this is used only in threadLocalStorage.cpp
1666 void* r = NULL;
1667 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1668 }
1669
1670
1671 // gethrtime can move backwards if read from one cpu and then a different cpu
1672 // getTimeNanos is guaranteed to not move backward on Solaris
1673 // local spinloop created as faster for a CAS on an int than
1674 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not
1675 // supported on sparc v8 or pre supports_cx8 intel boxes.
1676 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong
1677 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes
1678 inline hrtime_t oldgetTimeNanos() {
1679 int gotlock = LOCK_INVALID;
1680 hrtime_t newtime = gethrtime();
1681
1682 for (;;) {
1683 // grab lock for max_hrtime
1684 int curlock = max_hrtime_lock;
1685 if (curlock & LOCK_BUSY) continue;
1686 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue;
1687 if (newtime > max_hrtime) {
1688 max_hrtime = newtime;
1689 } else {
1690 newtime = max_hrtime;
1691 }
1692 // release lock
1693 max_hrtime_lock = LOCK_FREE;
1694 return newtime;
1695 }
1696 }
1697 // gethrtime can move backwards if read from one cpu and then a different cpu
1698 // getTimeNanos is guaranteed to not move backward on Solaris
1699 inline hrtime_t getTimeNanos() {
1700 if (VM_Version::supports_cx8()) {
1701 const hrtime_t now = gethrtime();
1702 // Use atomic long load since 32-bit x86 uses 2 registers to keep long.
1703 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime);
1704 if (now <= prev) return prev; // same or retrograde time;
1705 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1706 assert(obsv >= prev, "invariant"); // Monotonicity
1707 // If the CAS succeeded then we're done and return "now".
1708 // If the CAS failed and the observed value "obs" is >= now then
1709 // we should return "obs". If the CAS failed and now > obs > prv then
1710 // some other thread raced this thread and installed a new value, in which case
1711 // we could either (a) retry the entire operation, (b) retry trying to install now
1712 // or (c) just return obs. We use (c). No loop is required although in some cases
1713 // we might discard a higher "now" value in deference to a slightly lower but freshly
1714 // installed obs value. That's entirely benign -- it admits no new orderings compared
1715 // to (a) or (b) -- and greatly reduces coherence traffic.
1716 // We might also condition (c) on the magnitude of the delta between obs and now.
1717 // Avoiding excessive CAS operations to hot RW locations is critical.
1718 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate
1719 return (prev == obsv) ? now : obsv ;
1720 } else {
1721 return oldgetTimeNanos();
1722 }
1723 }
1724
1725 // Time since start-up in seconds to a fine granularity.
1726 // Used by VMSelfDestructTimer and the MemProfiler.
1727 double os::elapsedTime() {
1728 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1729 }
1730
1731 jlong os::elapsed_counter() {
1732 return (jlong)(getTimeNanos() - first_hrtime);
1733 }
1734
1735 jlong os::elapsed_frequency() {
1736 return hrtime_hz;
1737 }
1738
1739 // Return the real, user, and system times in seconds from an
1740 // arbitrary fixed point in the past.
1741 bool os::getTimesSecs(double* process_real_time,
1742 double* process_user_time,
1743 double* process_system_time) {
1744 struct tms ticks;
1745 clock_t real_ticks = times(&ticks);
1746
1747 if (real_ticks == (clock_t) (-1)) {
1748 return false;
1749 } else {
1750 double ticks_per_second = (double) clock_tics_per_sec;
1751 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1752 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1753 // For consistency return the real time from getTimeNanos()
1754 // converted to seconds.
1755 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1756
1757 return true;
1758 }
1759 }
1760
1761 bool os::supports_vtime() { return true; }
1762
1763 bool os::enable_vtime() {
1764 int fd = ::open("/proc/self/ctl", O_WRONLY);
1765 if (fd == -1)
1766 return false;
1767
1768 long cmd[] = { PCSET, PR_MSACCT };
1769 int res = ::write(fd, cmd, sizeof(long) * 2);
1770 ::close(fd);
1771 if (res != sizeof(long) * 2)
1772 return false;
1773
1774 return true;
1775 }
1776
1777 bool os::vtime_enabled() {
1778 int fd = ::open("/proc/self/status", O_RDONLY);
1779 if (fd == -1)
1780 return false;
1781
1782 pstatus_t status;
1783 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1784 ::close(fd);
1785 if (res != sizeof(pstatus_t))
1786 return false;
1787
1788 return status.pr_flags & PR_MSACCT;
1789 }
1790
1791 double os::elapsedVTime() {
1792 return (double)gethrvtime() / (double)hrtime_hz;
1793 }
1794
1795 // Used internally for comparisons only
1796 // getTimeMillis guaranteed to not move backwards on Solaris
1797 jlong getTimeMillis() {
1798 jlong nanotime = getTimeNanos();
1799 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1800 }
1801
1802 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1803 jlong os::javaTimeMillis() {
1804 timeval t;
1805 if (gettimeofday( &t, NULL) == -1)
1806 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1807 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1808 }
1809
1810 jlong os::javaTimeNanos() {
1811 return (jlong)getTimeNanos();
1812 }
1813
1814 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1815 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1816 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1817 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1818 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1819 }
1820
1821 char * os::local_time_string(char *buf, size_t buflen) {
1822 struct tm t;
1823 time_t long_time;
1824 time(&long_time);
1825 localtime_r(&long_time, &t);
1826 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1827 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1828 t.tm_hour, t.tm_min, t.tm_sec);
1829 return buf;
1830 }
1831
1832 // Note: os::shutdown() might be called very early during initialization, or
1833 // called from signal handler. Before adding something to os::shutdown(), make
1834 // sure it is async-safe and can handle partially initialized VM.
1835 void os::shutdown() {
1836
1837 // allow PerfMemory to attempt cleanup of any persistent resources
1838 perfMemory_exit();
1839
1840 // needs to remove object in file system
1841 AttachListener::abort();
1842
1843 // flush buffered output, finish log files
1844 ostream_abort();
1845
1846 // Check for abort hook
1847 abort_hook_t abort_hook = Arguments::abort_hook();
1848 if (abort_hook != NULL) {
1849 abort_hook();
1850 }
1851 }
1852
1853 // Note: os::abort() might be called very early during initialization, or
1854 // called from signal handler. Before adding something to os::abort(), make
1855 // sure it is async-safe and can handle partially initialized VM.
1856 void os::abort(bool dump_core) {
1857 os::shutdown();
1858 if (dump_core) {
1859 #ifndef PRODUCT
1860 fdStream out(defaultStream::output_fd());
1861 out.print_raw("Current thread is ");
1862 char buf[16];
1863 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1864 out.print_raw_cr(buf);
1865 out.print_raw_cr("Dumping core ...");
1866 #endif
1867 ::abort(); // dump core (for debugging)
1868 }
1869
1870 ::exit(1);
1871 }
1872
1873 // Die immediately, no exit hook, no abort hook, no cleanup.
1874 void os::die() {
1875 _exit(-1);
1876 }
1877
1878 // unused
1879 void os::set_error_file(const char *logfile) {}
1880
1881 // DLL functions
1882
1883 const char* os::dll_file_extension() { return ".so"; }
1884
1885 // This must be hard coded because it's the system's temporary
1886 // directory not the java application's temp directory, ala java.io.tmpdir.
1887 const char* os::get_temp_directory() { return "/tmp"; }
1888
1889 static bool file_exists(const char* filename) {
1890 struct stat statbuf;
1891 if (filename == NULL || strlen(filename) == 0) {
1892 return false;
1893 }
1894 return os::stat(filename, &statbuf) == 0;
1895 }
1896
1897 void os::dll_build_name(char* buffer, size_t buflen,
1898 const char* pname, const char* fname) {
1899 const size_t pnamelen = pname ? strlen(pname) : 0;
1900
1901 // Quietly truncate on buffer overflow. Should be an error.
1902 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1903 *buffer = '\0';
1904 return;
1905 }
1906
1907 if (pnamelen == 0) {
1908 snprintf(buffer, buflen, "lib%s.so", fname);
1909 } else if (strchr(pname, *os::path_separator()) != NULL) {
1910 int n;
1911 char** pelements = split_path(pname, &n);
1912 for (int i = 0 ; i < n ; i++) {
1913 // really shouldn't be NULL but what the heck, check can't hurt
1914 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1915 continue; // skip the empty path values
1916 }
1917 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1918 if (file_exists(buffer)) {
1919 break;
1920 }
1921 }
1922 // release the storage
1923 for (int i = 0 ; i < n ; i++) {
1924 if (pelements[i] != NULL) {
1925 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
1926 }
1927 }
1928 if (pelements != NULL) {
1929 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
1930 }
1931 } else {
1932 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1933 }
1934 }
1935
1936 const char* os::get_current_directory(char *buf, int buflen) {
1937 return getcwd(buf, buflen);
1938 }
1939
1940 // check if addr is inside libjvm[_g].so
1941 bool os::address_is_in_vm(address addr) {
1942 static address libjvm_base_addr;
1943 Dl_info dlinfo;
1944
1945 if (libjvm_base_addr == NULL) {
1946 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
1947 libjvm_base_addr = (address)dlinfo.dli_fbase;
1948 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1949 }
1950
1951 if (dladdr((void *)addr, &dlinfo)) {
1952 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1953 }
1954
1955 return false;
1956 }
1957
1958 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int);
1959 static dladdr1_func_type dladdr1_func = NULL;
1960
1961 bool os::dll_address_to_function_name(address addr, char *buf,
1962 int buflen, int * offset) {
1963 Dl_info dlinfo;
1964
1965 // dladdr1_func was initialized in os::init()
1966 if (dladdr1_func){
1967 // yes, we have dladdr1
1968
1969 // Support for dladdr1 is checked at runtime; it may be
1970 // available even if the vm is built on a machine that does
1971 // not have dladdr1 support. Make sure there is a value for
1972 // RTLD_DL_SYMENT.
1973 #ifndef RTLD_DL_SYMENT
1974 #define RTLD_DL_SYMENT 1
1975 #endif
1976 #ifdef _LP64
1977 Elf64_Sym * info;
1978 #else
1979 Elf32_Sym * info;
1980 #endif
1981 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1982 RTLD_DL_SYMENT)) {
1983 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1984 if (buf != NULL) {
1985 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
1986 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1987 }
1988 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1989 return true;
1990 }
1991 }
1992 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
1993 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1994 buf, buflen, offset, dlinfo.dli_fname)) {
1995 return true;
1996 }
1997 }
1998 if (buf != NULL) buf[0] = '\0';
1999 if (offset != NULL) *offset = -1;
2000 return false;
2001 } else {
2002 // no, only dladdr is available
2003 if (dladdr((void *)addr, &dlinfo)) {
2004 if (buf != NULL) {
2005 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
2006 jio_snprintf(buf, buflen, dlinfo.dli_sname);
2007 }
2008 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
2009 return true;
2010 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
2011 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
2012 buf, buflen, offset, dlinfo.dli_fname)) {
2013 return true;
2014 }
2015 }
2016 if (buf != NULL) buf[0] = '\0';
2017 if (offset != NULL) *offset = -1;
2018 return false;
2019 }
2020 }
2021
2022 bool os::dll_address_to_library_name(address addr, char* buf,
2023 int buflen, int* offset) {
2024 Dl_info dlinfo;
2025
2026 if (dladdr((void*)addr, &dlinfo)){
2027 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
2028 if (offset) *offset = addr - (address)dlinfo.dli_fbase;
2029 return true;
2030 } else {
2031 if (buf) buf[0] = '\0';
2032 if (offset) *offset = -1;
2033 return false;
2034 }
2035 }
2036
2037 // Prints the names and full paths of all opened dynamic libraries
2038 // for current process
2039 void os::print_dll_info(outputStream * st) {
2040 Dl_info dli;
2041 void *handle;
2042 Link_map *map;
2043 Link_map *p;
2044
2045 st->print_cr("Dynamic libraries:"); st->flush();
2046
2047 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) {
2048 st->print_cr("Error: Cannot print dynamic libraries.");
2049 return;
2050 }
2051 handle = dlopen(dli.dli_fname, RTLD_LAZY);
2052 if (handle == NULL) {
2053 st->print_cr("Error: Cannot print dynamic libraries.");
2054 return;
2055 }
2056 dlinfo(handle, RTLD_DI_LINKMAP, &map);
2057 if (map == NULL) {
2058 st->print_cr("Error: Cannot print dynamic libraries.");
2059 return;
2060 }
2061
2062 while (map->l_prev != NULL)
2063 map = map->l_prev;
2064
2065 while (map != NULL) {
2066 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
2067 map = map->l_next;
2068 }
2069
2070 dlclose(handle);
2071 }
2072
2073 // Loads .dll/.so and
2074 // in case of error it checks if .dll/.so was built for the
2075 // same architecture as Hotspot is running on
2076
2077 void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
2078 {
2079 void * result= ::dlopen(filename, RTLD_LAZY);
2080 if (result != NULL) {
2081 // Successful loading
2082 return result;
2083 }
2084
2085 Elf32_Ehdr elf_head;
2086
2087 // Read system error message into ebuf
2088 // It may or may not be overwritten below
2089 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
2090 ebuf[ebuflen-1]='\0';
2091 int diag_msg_max_length=ebuflen-strlen(ebuf);
2092 char* diag_msg_buf=ebuf+strlen(ebuf);
2093
2094 if (diag_msg_max_length==0) {
2095 // No more space in ebuf for additional diagnostics message
2096 return NULL;
2097 }
2098
2099
2100 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
2101
2102 if (file_descriptor < 0) {
2103 // Can't open library, report dlerror() message
2104 return NULL;
2105 }
2106
2107 bool failed_to_read_elf_head=
2108 (sizeof(elf_head)!=
2109 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
2110
2111 ::close(file_descriptor);
2112 if (failed_to_read_elf_head) {
2113 // file i/o error - report dlerror() msg
2114 return NULL;
2115 }
2116
2117 typedef struct {
2118 Elf32_Half code; // Actual value as defined in elf.h
2119 Elf32_Half compat_class; // Compatibility of archs at VM's sense
2120 char elf_class; // 32 or 64 bit
2121 char endianess; // MSB or LSB
2122 char* name; // String representation
2123 } arch_t;
2124
2125 static const arch_t arch_array[]={
2126 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2127 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2128 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
2129 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
2130 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2131 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2132 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
2133 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
2134 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
2135 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
2136 };
2137
2138 #if (defined IA32)
2139 static Elf32_Half running_arch_code=EM_386;
2140 #elif (defined AMD64)
2141 static Elf32_Half running_arch_code=EM_X86_64;
2142 #elif (defined IA64)
2143 static Elf32_Half running_arch_code=EM_IA_64;
2144 #elif (defined __sparc) && (defined _LP64)
2145 static Elf32_Half running_arch_code=EM_SPARCV9;
2146 #elif (defined __sparc) && (!defined _LP64)
2147 static Elf32_Half running_arch_code=EM_SPARC;
2148 #elif (defined __powerpc64__)
2149 static Elf32_Half running_arch_code=EM_PPC64;
2150 #elif (defined __powerpc__)
2151 static Elf32_Half running_arch_code=EM_PPC;
2152 #elif (defined ARM)
2153 static Elf32_Half running_arch_code=EM_ARM;
2154 #else
2155 #error Method os::dll_load requires that one of following is defined:\
2156 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
2157 #endif
2158
2159 // Identify compatability class for VM's architecture and library's architecture
2160 // Obtain string descriptions for architectures
2161
2162 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
2163 int running_arch_index=-1;
2164
2165 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
2166 if (running_arch_code == arch_array[i].code) {
2167 running_arch_index = i;
2168 }
2169 if (lib_arch.code == arch_array[i].code) {
2170 lib_arch.compat_class = arch_array[i].compat_class;
2171 lib_arch.name = arch_array[i].name;
2172 }
2173 }
2174
2175 assert(running_arch_index != -1,
2176 "Didn't find running architecture code (running_arch_code) in arch_array");
2177 if (running_arch_index == -1) {
2178 // Even though running architecture detection failed
2179 // we may still continue with reporting dlerror() message
2180 return NULL;
2181 }
2182
2183 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
2184 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
2185 return NULL;
2186 }
2187
2188 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
2189 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
2190 return NULL;
2191 }
2192
2193 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
2194 if ( lib_arch.name!=NULL ) {
2195 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2196 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
2197 lib_arch.name, arch_array[running_arch_index].name);
2198 } else {
2199 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2200 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
2201 lib_arch.code,
2202 arch_array[running_arch_index].name);
2203 }
2204 }
2205
2206 return NULL;
2207 }
2208
2209 void* os::dll_lookup(void* handle, const char* name) {
2210 return dlsym(handle, name);
2211 }
2212
2213 int os::stat(const char *path, struct stat *sbuf) {
2214 char pathbuf[MAX_PATH];
2215 if (strlen(path) > MAX_PATH - 1) {
2216 errno = ENAMETOOLONG;
2217 return -1;
2218 }
2219 os::native_path(strcpy(pathbuf, path));
2220 return ::stat(pathbuf, sbuf);
2221 }
2222
2223 static bool _print_ascii_file(const char* filename, outputStream* st) {
2224 int fd = ::open(filename, O_RDONLY);
2225 if (fd == -1) {
2226 return false;
2227 }
2228
2229 char buf[32];
2230 int bytes;
2231 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
2232 st->print_raw(buf, bytes);
2233 }
2234
2235 ::close(fd);
2236
2237 return true;
2238 }
2239
2240 void os::print_os_info_brief(outputStream* st) {
2241 os::Solaris::print_distro_info(st);
2242
2243 os::Posix::print_uname_info(st);
2244
2245 os::Solaris::print_libversion_info(st);
2246 }
2247
2248 void os::print_os_info(outputStream* st) {
2249 st->print("OS:");
2250
2251 os::Solaris::print_distro_info(st);
2252
2253 os::Posix::print_uname_info(st);
2254
2255 os::Solaris::print_libversion_info(st);
2256
2257 os::Posix::print_rlimit_info(st);
2258
2259 os::Posix::print_load_average(st);
2260 }
2261
2262 void os::Solaris::print_distro_info(outputStream* st) {
2263 if (!_print_ascii_file("/etc/release", st)) {
2264 st->print("Solaris");
2265 }
2266 st->cr();
2267 }
2268
2269 void os::Solaris::print_libversion_info(outputStream* st) {
2270 if (os::Solaris::T2_libthread()) {
2271 st->print(" (T2 libthread)");
2272 }
2273 else {
2274 st->print(" (T1 libthread)");
2275 }
2276 st->cr();
2277 }
2278
2279 static bool check_addr0(outputStream* st) {
2280 jboolean status = false;
2281 int fd = ::open("/proc/self/map",O_RDONLY);
2282 if (fd >= 0) {
2283 prmap_t p;
2284 while(::read(fd, &p, sizeof(p)) > 0) {
2285 if (p.pr_vaddr == 0x0) {
2286 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
2287 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
2288 st->print("Access:");
2289 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
2290 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
2291 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
2292 st->cr();
2293 status = true;
2294 }
2295 ::close(fd);
2296 }
2297 }
2298 return status;
2299 }
2300
2301 void os::pd_print_cpu_info(outputStream* st) {
2302 // Nothing to do for now.
2303 }
2304
2305 void os::print_memory_info(outputStream* st) {
2306 st->print("Memory:");
2307 st->print(" %dk page", os::vm_page_size()>>10);
2308 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2309 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2310 st->cr();
2311 (void) check_addr0(st);
2312 }
2313
2314 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific
2315 // but they're the same for all the solaris architectures that we support.
2316 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR",
2317 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG",
2318 "ILL_COPROC", "ILL_BADSTK" };
2319
2320 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV",
2321 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES",
2322 "FPE_FLTINV", "FPE_FLTSUB" };
2323
2324 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" };
2325
2326 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" };
2327
2328 void os::print_siginfo(outputStream* st, void* siginfo) {
2329 st->print("siginfo:");
2330
2331 const int buflen = 100;
2332 char buf[buflen];
2333 siginfo_t *si = (siginfo_t*)siginfo;
2334 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen));
2335 char *err = strerror(si->si_errno);
2336 if (si->si_errno != 0 && err != NULL) {
2337 st->print("si_errno=%s", err);
2338 } else {
2339 st->print("si_errno=%d", si->si_errno);
2340 }
2341 const int c = si->si_code;
2342 assert(c > 0, "unexpected si_code");
2343 switch (si->si_signo) {
2344 case SIGILL:
2345 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]);
2346 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2347 break;
2348 case SIGFPE:
2349 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]);
2350 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2351 break;
2352 case SIGSEGV:
2353 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]);
2354 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2355 break;
2356 case SIGBUS:
2357 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]);
2358 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2359 break;
2360 default:
2361 st->print(", si_code=%d", si->si_code);
2362 // no si_addr
2363 }
2364
2365 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2366 UseSharedSpaces) {
2367 FileMapInfo* mapinfo = FileMapInfo::current_info();
2368 if (mapinfo->is_in_shared_space(si->si_addr)) {
2369 st->print("\n\nError accessing class data sharing archive." \
2370 " Mapped file inaccessible during execution, " \
2371 " possible disk/network problem.");
2372 }
2373 }
2374 st->cr();
2375 }
2376
2377 // Moved from whole group, because we need them here for diagnostic
2378 // prints.
2379 #define OLDMAXSIGNUM 32
2380 static int Maxsignum = 0;
2381 static int *ourSigFlags = NULL;
2382
2383 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2384
2385 int os::Solaris::get_our_sigflags(int sig) {
2386 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2387 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2388 return ourSigFlags[sig];
2389 }
2390
2391 void os::Solaris::set_our_sigflags(int sig, int flags) {
2392 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2393 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2394 ourSigFlags[sig] = flags;
2395 }
2396
2397
2398 static const char* get_signal_handler_name(address handler,
2399 char* buf, int buflen) {
2400 int offset;
2401 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2402 if (found) {
2403 // skip directory names
2404 const char *p1, *p2;
2405 p1 = buf;
2406 size_t len = strlen(os::file_separator());
2407 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2408 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2409 } else {
2410 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2411 }
2412 return buf;
2413 }
2414
2415 static void print_signal_handler(outputStream* st, int sig,
2416 char* buf, size_t buflen) {
2417 struct sigaction sa;
2418
2419 sigaction(sig, NULL, &sa);
2420
2421 st->print("%s: ", os::exception_name(sig, buf, buflen));
2422
2423 address handler = (sa.sa_flags & SA_SIGINFO)
2424 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2425 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2426
2427 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2428 st->print("SIG_DFL");
2429 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2430 st->print("SIG_IGN");
2431 } else {
2432 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2433 }
2434
2435 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask);
2436
2437 address rh = VMError::get_resetted_sighandler(sig);
2438 // May be, handler was resetted by VMError?
2439 if(rh != NULL) {
2440 handler = rh;
2441 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2442 }
2443
2444 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags);
2445
2446 // Check: is it our handler?
2447 if(handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2448 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2449 // It is our signal handler
2450 // check for flags
2451 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2452 st->print(
2453 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2454 os::Solaris::get_our_sigflags(sig));
2455 }
2456 }
2457 st->cr();
2458 }
2459
2460 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2461 st->print_cr("Signal Handlers:");
2462 print_signal_handler(st, SIGSEGV, buf, buflen);
2463 print_signal_handler(st, SIGBUS , buf, buflen);
2464 print_signal_handler(st, SIGFPE , buf, buflen);
2465 print_signal_handler(st, SIGPIPE, buf, buflen);
2466 print_signal_handler(st, SIGXFSZ, buf, buflen);
2467 print_signal_handler(st, SIGILL , buf, buflen);
2468 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2469 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2470 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2471 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2472 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2473 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2474 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2475 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2476 }
2477
2478 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2479
2480 // Find the full path to the current module, libjvm.so or libjvm_g.so
2481 void os::jvm_path(char *buf, jint buflen) {
2482 // Error checking.
2483 if (buflen < MAXPATHLEN) {
2484 assert(false, "must use a large-enough buffer");
2485 buf[0] = '\0';
2486 return;
2487 }
2488 // Lazy resolve the path to current module.
2489 if (saved_jvm_path[0] != 0) {
2490 strcpy(buf, saved_jvm_path);
2491 return;
2492 }
2493
2494 Dl_info dlinfo;
2495 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2496 assert(ret != 0, "cannot locate libjvm");
2497 realpath((char *)dlinfo.dli_fname, buf);
2498
2499 if (Arguments::created_by_gamma_launcher()) {
2500 // Support for the gamma launcher. Typical value for buf is
2501 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at
2502 // the right place in the string, then assume we are installed in a JDK and
2503 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix
2504 // up the path so it looks like libjvm.so is installed there (append a
2505 // fake suffix hotspot/libjvm.so).
2506 const char *p = buf + strlen(buf) - 1;
2507 for (int count = 0; p > buf && count < 5; ++count) {
2508 for (--p; p > buf && *p != '/'; --p)
2509 /* empty */ ;
2510 }
2511
2512 if (strncmp(p, "/jre/lib/", 9) != 0) {
2513 // Look for JAVA_HOME in the environment.
2514 char* java_home_var = ::getenv("JAVA_HOME");
2515 if (java_home_var != NULL && java_home_var[0] != 0) {
2516 char cpu_arch[12];
2517 char* jrelib_p;
2518 int len;
2519 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2520 #ifdef _LP64
2521 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2522 if (strcmp(cpu_arch, "sparc") == 0) {
2523 strcat(cpu_arch, "v9");
2524 } else if (strcmp(cpu_arch, "i386") == 0) {
2525 strcpy(cpu_arch, "amd64");
2526 }
2527 #endif
2528 // Check the current module name "libjvm.so" or "libjvm_g.so".
2529 p = strrchr(buf, '/');
2530 assert(strstr(p, "/libjvm") == p, "invalid library name");
2531 p = strstr(p, "_g") ? "_g" : "";
2532
2533 realpath(java_home_var, buf);
2534 // determine if this is a legacy image or modules image
2535 // modules image doesn't have "jre" subdirectory
2536 len = strlen(buf);
2537 jrelib_p = buf + len;
2538 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2539 if (0 != access(buf, F_OK)) {
2540 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2541 }
2542
2543 if (0 == access(buf, F_OK)) {
2544 // Use current module name "libjvm[_g].so" instead of
2545 // "libjvm"debug_only("_g")".so" since for fastdebug version
2546 // we should have "libjvm.so" but debug_only("_g") adds "_g"!
2547 len = strlen(buf);
2548 snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p);
2549 } else {
2550 // Go back to path of .so
2551 realpath((char *)dlinfo.dli_fname, buf);
2552 }
2553 }
2554 }
2555 }
2556
2557 strcpy(saved_jvm_path, buf);
2558 }
2559
2560
2561 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2562 // no prefix required, not even "_"
2563 }
2564
2565
2566 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2567 // no suffix required
2568 }
2569
2570 // This method is a copy of JDK's sysGetLastErrorString
2571 // from src/solaris/hpi/src/system_md.c
2572
2573 size_t os::lasterror(char *buf, size_t len) {
2574
2575 if (errno == 0) return 0;
2576
2577 const char *s = ::strerror(errno);
2578 size_t n = ::strlen(s);
2579 if (n >= len) {
2580 n = len - 1;
2581 }
2582 ::strncpy(buf, s, n);
2583 buf[n] = '\0';
2584 return n;
2585 }
2586
2587
2588 // sun.misc.Signal
2589
2590 extern "C" {
2591 static void UserHandler(int sig, void *siginfo, void *context) {
2592 // Ctrl-C is pressed during error reporting, likely because the error
2593 // handler fails to abort. Let VM die immediately.
2594 if (sig == SIGINT && is_error_reported()) {
2595 os::die();
2596 }
2597
2598 os::signal_notify(sig);
2599 // We do not need to reinstate the signal handler each time...
2600 }
2601 }
2602
2603 void* os::user_handler() {
2604 return CAST_FROM_FN_PTR(void*, UserHandler);
2605 }
2606
2607 extern "C" {
2608 typedef void (*sa_handler_t)(int);
2609 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2610 }
2611
2612 void* os::signal(int signal_number, void* handler) {
2613 struct sigaction sigAct, oldSigAct;
2614 sigfillset(&(sigAct.sa_mask));
2615 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2616 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2617
2618 if (sigaction(signal_number, &sigAct, &oldSigAct))
2619 // -1 means registration failed
2620 return (void *)-1;
2621
2622 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2623 }
2624
2625 void os::signal_raise(int signal_number) {
2626 raise(signal_number);
2627 }
2628
2629 /*
2630 * The following code is moved from os.cpp for making this
2631 * code platform specific, which it is by its very nature.
2632 */
2633
2634 // a counter for each possible signal value
2635 static int Sigexit = 0;
2636 static int Maxlibjsigsigs;
2637 static jint *pending_signals = NULL;
2638 static int *preinstalled_sigs = NULL;
2639 static struct sigaction *chainedsigactions = NULL;
2640 static sema_t sig_sem;
2641 typedef int (*version_getting_t)();
2642 version_getting_t os::Solaris::get_libjsig_version = NULL;
2643 static int libjsigversion = NULL;
2644
2645 int os::sigexitnum_pd() {
2646 assert(Sigexit > 0, "signal memory not yet initialized");
2647 return Sigexit;
2648 }
2649
2650 void os::Solaris::init_signal_mem() {
2651 // Initialize signal structures
2652 Maxsignum = SIGRTMAX;
2653 Sigexit = Maxsignum+1;
2654 assert(Maxsignum >0, "Unable to obtain max signal number");
2655
2656 Maxlibjsigsigs = Maxsignum;
2657
2658 // pending_signals has one int per signal
2659 // The additional signal is for SIGEXIT - exit signal to signal_thread
2660 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2661 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2662
2663 if (UseSignalChaining) {
2664 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2665 * (Maxsignum + 1), mtInternal);
2666 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2667 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2668 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2669 }
2670 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal);
2671 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2672 }
2673
2674 void os::signal_init_pd() {
2675 int ret;
2676
2677 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2678 assert(ret == 0, "sema_init() failed");
2679 }
2680
2681 void os::signal_notify(int signal_number) {
2682 int ret;
2683
2684 Atomic::inc(&pending_signals[signal_number]);
2685 ret = ::sema_post(&sig_sem);
2686 assert(ret == 0, "sema_post() failed");
2687 }
2688
2689 static int check_pending_signals(bool wait_for_signal) {
2690 int ret;
2691 while (true) {
2692 for (int i = 0; i < Sigexit + 1; i++) {
2693 jint n = pending_signals[i];
2694 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2695 return i;
2696 }
2697 }
2698 if (!wait_for_signal) {
2699 return -1;
2700 }
2701 JavaThread *thread = JavaThread::current();
2702 ThreadBlockInVM tbivm(thread);
2703
2704 bool threadIsSuspended;
2705 do {
2706 thread->set_suspend_equivalent();
2707 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2708 while((ret = ::sema_wait(&sig_sem)) == EINTR)
2709 ;
2710 assert(ret == 0, "sema_wait() failed");
2711
2712 // were we externally suspended while we were waiting?
2713 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2714 if (threadIsSuspended) {
2715 //
2716 // The semaphore has been incremented, but while we were waiting
2717 // another thread suspended us. We don't want to continue running
2718 // while suspended because that would surprise the thread that
2719 // suspended us.
2720 //
2721 ret = ::sema_post(&sig_sem);
2722 assert(ret == 0, "sema_post() failed");
2723
2724 thread->java_suspend_self();
2725 }
2726 } while (threadIsSuspended);
2727 }
2728 }
2729
2730 int os::signal_lookup() {
2731 return check_pending_signals(false);
2732 }
2733
2734 int os::signal_wait() {
2735 return check_pending_signals(true);
2736 }
2737
2738 ////////////////////////////////////////////////////////////////////////////////
2739 // Virtual Memory
2740
2741 static int page_size = -1;
2742
2743 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2744 // clear this var if support is not available.
2745 static bool has_map_align = true;
2746
2747 int os::vm_page_size() {
2748 assert(page_size != -1, "must call os::init");
2749 return page_size;
2750 }
2751
2752 // Solaris allocates memory by pages.
2753 int os::vm_allocation_granularity() {
2754 assert(page_size != -1, "must call os::init");
2755 return page_size;
2756 }
2757
2758 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2759 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2760 size_t size = bytes;
2761 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2762 if (res != NULL) {
2763 if (UseNUMAInterleaving) {
2764 numa_make_global(addr, bytes);
2765 }
2766 return true;
2767 }
2768 return false;
2769 }
2770
2771 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2772 bool exec) {
2773 if (commit_memory(addr, bytes, exec)) {
2774 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) {
2775 // If the large page size has been set and the VM
2776 // is using large pages, use the large page size
2777 // if it is smaller than the alignment hint. This is
2778 // a case where the VM wants to use a larger alignment size
2779 // for its own reasons but still want to use large pages
2780 // (which is what matters to setting the mpss range.
2781 size_t page_size = 0;
2782 if (large_page_size() < alignment_hint) {
2783 assert(UseLargePages, "Expected to be here for large page use only");
2784 page_size = large_page_size();
2785 } else {
2786 // If the alignment hint is less than the large page
2787 // size, the VM wants a particular alignment (thus the hint)
2788 // for internal reasons. Try to set the mpss range using
2789 // the alignment_hint.
2790 page_size = alignment_hint;
2791 }
2792 // Since this is a hint, ignore any failures.
2793 (void)Solaris::set_mpss_range(addr, bytes, page_size);
2794 }
2795 return true;
2796 }
2797 return false;
2798 }
2799
2800 // Uncommit the pages in a specified region.
2801 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2802 if (madvise(addr, bytes, MADV_FREE) < 0) {
2803 debug_only(warning("MADV_FREE failed."));
2804 return;
2805 }
2806 }
2807
2808 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2809 return os::commit_memory(addr, size);
2810 }
2811
2812 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2813 return os::uncommit_memory(addr, size);
2814 }
2815
2816 // Change the page size in a given range.
2817 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2818 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2819 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2820 if (UseLargePages && UseMPSS) {
2821 Solaris::set_mpss_range(addr, bytes, alignment_hint);
2822 }
2823 }
2824
2825 // Tell the OS to make the range local to the first-touching LWP
2826 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2827 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2828 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2829 debug_only(warning("MADV_ACCESS_LWP failed."));
2830 }
2831 }
2832
2833 // Tell the OS that this range would be accessed from different LWPs.
2834 void os::numa_make_global(char *addr, size_t bytes) {
2835 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2836 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2837 debug_only(warning("MADV_ACCESS_MANY failed."));
2838 }
2839 }
2840
2841 // Get the number of the locality groups.
2842 size_t os::numa_get_groups_num() {
2843 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2844 return n != -1 ? n : 1;
2845 }
2846
2847 // Get a list of leaf locality groups. A leaf lgroup is group that
2848 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2849 // board. An LWP is assigned to one of these groups upon creation.
2850 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2851 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2852 ids[0] = 0;
2853 return 1;
2854 }
2855 int result_size = 0, top = 1, bottom = 0, cur = 0;
2856 for (int k = 0; k < size; k++) {
2857 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2858 (Solaris::lgrp_id_t*)&ids[top], size - top);
2859 if (r == -1) {
2860 ids[0] = 0;
2861 return 1;
2862 }
2863 if (!r) {
2864 // That's a leaf node.
2865 assert (bottom <= cur, "Sanity check");
2866 // Check if the node has memory
2867 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2868 NULL, 0, LGRP_RSRC_MEM) > 0) {
2869 ids[bottom++] = ids[cur];
2870 }
2871 }
2872 top += r;
2873 cur++;
2874 }
2875 if (bottom == 0) {
2876 // Handle a situation, when the OS reports no memory available.
2877 // Assume UMA architecture.
2878 ids[0] = 0;
2879 return 1;
2880 }
2881 return bottom;
2882 }
2883
2884 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2885 bool os::numa_topology_changed() {
2886 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2887 if (is_stale != -1 && is_stale) {
2888 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2889 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2890 assert(c != 0, "Failure to initialize LGRP API");
2891 Solaris::set_lgrp_cookie(c);
2892 return true;
2893 }
2894 return false;
2895 }
2896
2897 // Get the group id of the current LWP.
2898 int os::numa_get_group_id() {
2899 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2900 if (lgrp_id == -1) {
2901 return 0;
2902 }
2903 const int size = os::numa_get_groups_num();
2904 int *ids = (int*)alloca(size * sizeof(int));
2905
2906 // Get the ids of all lgroups with memory; r is the count.
2907 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2908 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2909 if (r <= 0) {
2910 return 0;
2911 }
2912 return ids[os::random() % r];
2913 }
2914
2915 // Request information about the page.
2916 bool os::get_page_info(char *start, page_info* info) {
2917 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2918 uint64_t addr = (uintptr_t)start;
2919 uint64_t outdata[2];
2920 uint_t validity = 0;
2921
2922 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2923 return false;
2924 }
2925
2926 info->size = 0;
2927 info->lgrp_id = -1;
2928
2929 if ((validity & 1) != 0) {
2930 if ((validity & 2) != 0) {
2931 info->lgrp_id = outdata[0];
2932 }
2933 if ((validity & 4) != 0) {
2934 info->size = outdata[1];
2935 }
2936 return true;
2937 }
2938 return false;
2939 }
2940
2941 // Scan the pages from start to end until a page different than
2942 // the one described in the info parameter is encountered.
2943 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
2944 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2945 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2946 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT];
2947 uint_t validity[MAX_MEMINFO_CNT];
2948
2949 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2950 uint64_t p = (uint64_t)start;
2951 while (p < (uint64_t)end) {
2952 addrs[0] = p;
2953 size_t addrs_count = 1;
2954 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) {
2955 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2956 addrs_count++;
2957 }
2958
2959 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2960 return NULL;
2961 }
2962
2963 size_t i = 0;
2964 for (; i < addrs_count; i++) {
2965 if ((validity[i] & 1) != 0) {
2966 if ((validity[i] & 4) != 0) {
2967 if (outdata[types * i + 1] != page_expected->size) {
2968 break;
2969 }
2970 } else
2971 if (page_expected->size != 0) {
2972 break;
2973 }
2974
2975 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2976 if (outdata[types * i] != page_expected->lgrp_id) {
2977 break;
2978 }
2979 }
2980 } else {
2981 return NULL;
2982 }
2983 }
2984
2985 if (i != addrs_count) {
2986 if ((validity[i] & 2) != 0) {
2987 page_found->lgrp_id = outdata[types * i];
2988 } else {
2989 page_found->lgrp_id = -1;
2990 }
2991 if ((validity[i] & 4) != 0) {
2992 page_found->size = outdata[types * i + 1];
2993 } else {
2994 page_found->size = 0;
2995 }
2996 return (char*)addrs[i];
2997 }
2998
2999 p = addrs[addrs_count - 1] + page_size;
3000 }
3001 return end;
3002 }
3003
3004 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
3005 size_t size = bytes;
3006 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3007 // uncommitted page. Otherwise, the read/write might succeed if we
3008 // have enough swap space to back the physical page.
3009 return
3010 NULL != Solaris::mmap_chunk(addr, size,
3011 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
3012 PROT_NONE);
3013 }
3014
3015 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
3016 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
3017
3018 if (b == MAP_FAILED) {
3019 return NULL;
3020 }
3021 return b;
3022 }
3023
3024 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) {
3025 char* addr = requested_addr;
3026 int flags = MAP_PRIVATE | MAP_NORESERVE;
3027
3028 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap");
3029
3030 if (fixed) {
3031 flags |= MAP_FIXED;
3032 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
3033 flags |= MAP_ALIGN;
3034 addr = (char*) alignment_hint;
3035 }
3036
3037 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3038 // uncommitted page. Otherwise, the read/write might succeed if we
3039 // have enough swap space to back the physical page.
3040 return mmap_chunk(addr, bytes, flags, PROT_NONE);
3041 }
3042
3043 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
3044 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL));
3045
3046 guarantee(requested_addr == NULL || requested_addr == addr,
3047 "OS failed to return requested mmap address.");
3048 return addr;
3049 }
3050
3051 // Reserve memory at an arbitrary address, only if that area is
3052 // available (and not reserved for something else).
3053
3054 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
3055 const int max_tries = 10;
3056 char* base[max_tries];
3057 size_t size[max_tries];
3058
3059 // Solaris adds a gap between mmap'ed regions. The size of the gap
3060 // is dependent on the requested size and the MMU. Our initial gap
3061 // value here is just a guess and will be corrected later.
3062 bool had_top_overlap = false;
3063 bool have_adjusted_gap = false;
3064 size_t gap = 0x400000;
3065
3066 // Assert only that the size is a multiple of the page size, since
3067 // that's all that mmap requires, and since that's all we really know
3068 // about at this low abstraction level. If we need higher alignment,
3069 // we can either pass an alignment to this method or verify alignment
3070 // in one of the methods further up the call chain. See bug 5044738.
3071 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
3072
3073 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
3074 // Give it a try, if the kernel honors the hint we can return immediately.
3075 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
3076
3077 volatile int err = errno;
3078 if (addr == requested_addr) {
3079 return addr;
3080 } else if (addr != NULL) {
3081 pd_unmap_memory(addr, bytes);
3082 }
3083
3084 if (PrintMiscellaneous && Verbose) {
3085 char buf[256];
3086 buf[0] = '\0';
3087 if (addr == NULL) {
3088 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
3089 }
3090 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
3091 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
3092 "%s", bytes, requested_addr, addr, buf);
3093 }
3094
3095 // Address hint method didn't work. Fall back to the old method.
3096 // In theory, once SNV becomes our oldest supported platform, this
3097 // code will no longer be needed.
3098 //
3099 // Repeatedly allocate blocks until the block is allocated at the
3100 // right spot. Give up after max_tries.
3101 int i;
3102 for (i = 0; i < max_tries; ++i) {
3103 base[i] = reserve_memory(bytes);
3104
3105 if (base[i] != NULL) {
3106 // Is this the block we wanted?
3107 if (base[i] == requested_addr) {
3108 size[i] = bytes;
3109 break;
3110 }
3111
3112 // check that the gap value is right
3113 if (had_top_overlap && !have_adjusted_gap) {
3114 size_t actual_gap = base[i-1] - base[i] - bytes;
3115 if (gap != actual_gap) {
3116 // adjust the gap value and retry the last 2 allocations
3117 assert(i > 0, "gap adjustment code problem");
3118 have_adjusted_gap = true; // adjust the gap only once, just in case
3119 gap = actual_gap;
3120 if (PrintMiscellaneous && Verbose) {
3121 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
3122 }
3123 unmap_memory(base[i], bytes);
3124 unmap_memory(base[i-1], size[i-1]);
3125 i-=2;
3126 continue;
3127 }
3128 }
3129
3130 // Does this overlap the block we wanted? Give back the overlapped
3131 // parts and try again.
3132 //
3133 // There is still a bug in this code: if top_overlap == bytes,
3134 // the overlap is offset from requested region by the value of gap.
3135 // In this case giving back the overlapped part will not work,
3136 // because we'll give back the entire block at base[i] and
3137 // therefore the subsequent allocation will not generate a new gap.
3138 // This could be fixed with a new algorithm that used larger
3139 // or variable size chunks to find the requested region -
3140 // but such a change would introduce additional complications.
3141 // It's rare enough that the planets align for this bug,
3142 // so we'll just wait for a fix for 6204603/5003415 which
3143 // will provide a mmap flag to allow us to avoid this business.
3144
3145 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
3146 if (top_overlap >= 0 && top_overlap < bytes) {
3147 had_top_overlap = true;
3148 unmap_memory(base[i], top_overlap);
3149 base[i] += top_overlap;
3150 size[i] = bytes - top_overlap;
3151 } else {
3152 size_t bottom_overlap = base[i] + bytes - requested_addr;
3153 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
3154 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
3155 warning("attempt_reserve_memory_at: possible alignment bug");
3156 }
3157 unmap_memory(requested_addr, bottom_overlap);
3158 size[i] = bytes - bottom_overlap;
3159 } else {
3160 size[i] = bytes;
3161 }
3162 }
3163 }
3164 }
3165
3166 // Give back the unused reserved pieces.
3167
3168 for (int j = 0; j < i; ++j) {
3169 if (base[j] != NULL) {
3170 unmap_memory(base[j], size[j]);
3171 }
3172 }
3173
3174 return (i < max_tries) ? requested_addr : NULL;
3175 }
3176
3177 bool os::pd_release_memory(char* addr, size_t bytes) {
3178 size_t size = bytes;
3179 return munmap(addr, size) == 0;
3180 }
3181
3182 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
3183 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
3184 "addr must be page aligned");
3185 int retVal = mprotect(addr, bytes, prot);
3186 return retVal == 0;
3187 }
3188
3189 // Protect memory (Used to pass readonly pages through
3190 // JNI GetArray<type>Elements with empty arrays.)
3191 // Also, used for serialization page and for compressed oops null pointer
3192 // checking.
3193 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3194 bool is_committed) {
3195 unsigned int p = 0;
3196 switch (prot) {
3197 case MEM_PROT_NONE: p = PROT_NONE; break;
3198 case MEM_PROT_READ: p = PROT_READ; break;
3199 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3200 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3201 default:
3202 ShouldNotReachHere();
3203 }
3204 // is_committed is unused.
3205 return solaris_mprotect(addr, bytes, p);
3206 }
3207
3208 // guard_memory and unguard_memory only happens within stack guard pages.
3209 // Since ISM pertains only to the heap, guard and unguard memory should not
3210 /// happen with an ISM region.
3211 bool os::guard_memory(char* addr, size_t bytes) {
3212 return solaris_mprotect(addr, bytes, PROT_NONE);
3213 }
3214
3215 bool os::unguard_memory(char* addr, size_t bytes) {
3216 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3217 }
3218
3219 // Large page support
3220
3221 // UseLargePages is the master flag to enable/disable large page memory.
3222 // UseMPSS and UseISM are supported for compatibility reasons. Their combined
3223 // effects can be described in the following table:
3224 //
3225 // UseLargePages UseMPSS UseISM
3226 // false * * => UseLargePages is the master switch, turning
3227 // it off will turn off both UseMPSS and
3228 // UseISM. VM will not use large page memory
3229 // regardless the settings of UseMPSS/UseISM.
3230 // true false false => Unless future Solaris provides other
3231 // mechanism to use large page memory, this
3232 // combination is equivalent to -UseLargePages,
3233 // VM will not use large page memory
3234 // true true false => JVM will use MPSS for large page memory.
3235 // This is the default behavior.
3236 // true false true => JVM will use ISM for large page memory.
3237 // true true true => JVM will use ISM if it is available.
3238 // Otherwise, JVM will fall back to MPSS.
3239 // Becaues ISM is now available on all
3240 // supported Solaris versions, this combination
3241 // is equivalent to +UseISM -UseMPSS.
3242
3243 static size_t _large_page_size = 0;
3244
3245 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) {
3246 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address
3247 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc
3248 // can support multiple page sizes.
3249
3250 // Don't bother to probe page size because getpagesizes() comes with MPSS.
3251 // ISM is only recommended on old Solaris where there is no MPSS support.
3252 // Simply choose a conservative value as default.
3253 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes :
3254 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M)
3255 ARM_ONLY(2 * M);
3256
3257 // ISM is available on all supported Solaris versions
3258 return true;
3259 }
3260
3261 // Insertion sort for small arrays (descending order).
3262 static void insertion_sort_descending(size_t* array, int len) {
3263 for (int i = 0; i < len; i++) {
3264 size_t val = array[i];
3265 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3266 size_t tmp = array[key];
3267 array[key] = array[key - 1];
3268 array[key - 1] = tmp;
3269 }
3270 }
3271 }
3272
3273 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
3274 const unsigned int usable_count = VM_Version::page_size_count();
3275 if (usable_count == 1) {
3276 return false;
3277 }
3278
3279 // Find the right getpagesizes interface. When solaris 11 is the minimum
3280 // build platform, getpagesizes() (without the '2') can be called directly.
3281 typedef int (*gps_t)(size_t[], int);
3282 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3283 if (gps_func == NULL) {
3284 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3285 if (gps_func == NULL) {
3286 if (warn) {
3287 warning("MPSS is not supported by the operating system.");
3288 }
3289 return false;
3290 }
3291 }
3292
3293 // Fill the array of page sizes.
3294 int n = (*gps_func)(_page_sizes, page_sizes_max);
3295 assert(n > 0, "Solaris bug?");
3296
3297 if (n == page_sizes_max) {
3298 // Add a sentinel value (necessary only if the array was completely filled
3299 // since it is static (zeroed at initialization)).
3300 _page_sizes[--n] = 0;
3301 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3302 }
3303 assert(_page_sizes[n] == 0, "missing sentinel");
3304 trace_page_sizes("available page sizes", _page_sizes, n);
3305
3306 if (n == 1) return false; // Only one page size available.
3307
3308 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3309 // select up to usable_count elements. First sort the array, find the first
3310 // acceptable value, then copy the usable sizes to the top of the array and
3311 // trim the rest. Make sure to include the default page size :-).
3312 //
3313 // A better policy could get rid of the 4M limit by taking the sizes of the
3314 // important VM memory regions (java heap and possibly the code cache) into
3315 // account.
3316 insertion_sort_descending(_page_sizes, n);
3317 const size_t size_limit =
3318 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3319 int beg;
3320 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
3321 const int end = MIN2((int)usable_count, n) - 1;
3322 for (int cur = 0; cur < end; ++cur, ++beg) {
3323 _page_sizes[cur] = _page_sizes[beg];
3324 }
3325 _page_sizes[end] = vm_page_size();
3326 _page_sizes[end + 1] = 0;
3327
3328 if (_page_sizes[end] > _page_sizes[end - 1]) {
3329 // Default page size is not the smallest; sort again.
3330 insertion_sort_descending(_page_sizes, end + 1);
3331 }
3332 *page_size = _page_sizes[0];
3333
3334 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3335 return true;
3336 }
3337
3338 void os::large_page_init() {
3339 if (!UseLargePages) {
3340 UseISM = false;
3341 UseMPSS = false;
3342 return;
3343 }
3344
3345 // print a warning if any large page related flag is specified on command line
3346 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3347 !FLAG_IS_DEFAULT(UseISM) ||
3348 !FLAG_IS_DEFAULT(UseMPSS) ||
3349 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3350 UseISM = UseISM &&
3351 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size);
3352 if (UseISM) {
3353 // ISM disables MPSS to be compatible with old JDK behavior
3354 UseMPSS = false;
3355 _page_sizes[0] = _large_page_size;
3356 _page_sizes[1] = vm_page_size();
3357 }
3358
3359 UseMPSS = UseMPSS &&
3360 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3361
3362 UseLargePages = UseISM || UseMPSS;
3363 }
3364
3365 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) {
3366 // Signal to OS that we want large pages for addresses
3367 // from addr, addr + bytes
3368 struct memcntl_mha mpss_struct;
3369 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3370 mpss_struct.mha_pagesize = align;
3371 mpss_struct.mha_flags = 0;
3372 if (memcntl(start, bytes, MC_HAT_ADVISE,
3373 (caddr_t) &mpss_struct, 0, 0) < 0) {
3374 debug_only(warning("Attempt to use MPSS failed."));
3375 return false;
3376 }
3377 return true;
3378 }
3379
3380 char* os::reserve_memory_special(size_t size, char* addr, bool exec) {
3381 // "exec" is passed in but not used. Creating the shared image for
3382 // the code cache doesn't have an SHM_X executable permission to check.
3383 assert(UseLargePages && UseISM, "only for ISM large pages");
3384
3385 char* retAddr = NULL;
3386 int shmid;
3387 key_t ismKey;
3388
3389 bool warn_on_failure = UseISM &&
3390 (!FLAG_IS_DEFAULT(UseLargePages) ||
3391 !FLAG_IS_DEFAULT(UseISM) ||
3392 !FLAG_IS_DEFAULT(LargePageSizeInBytes)
3393 );
3394 char msg[128];
3395
3396 ismKey = IPC_PRIVATE;
3397
3398 // Create a large shared memory region to attach to based on size.
3399 // Currently, size is the total size of the heap
3400 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT);
3401 if (shmid == -1){
3402 if (warn_on_failure) {
3403 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
3404 warning(msg);
3405 }
3406 return NULL;
3407 }
3408
3409 // Attach to the region
3410 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W);
3411 int err = errno;
3412
3413 // Remove shmid. If shmat() is successful, the actual shared memory segment
3414 // will be deleted when it's detached by shmdt() or when the process
3415 // terminates. If shmat() is not successful this will remove the shared
3416 // segment immediately.
3417 shmctl(shmid, IPC_RMID, NULL);
3418
3419 if (retAddr == (char *) -1) {
3420 if (warn_on_failure) {
3421 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
3422 warning(msg);
3423 }
3424 return NULL;
3425 }
3426 if ((retAddr != NULL) && UseNUMAInterleaving) {
3427 numa_make_global(retAddr, size);
3428 }
3429 return retAddr;
3430 }
3431
3432 bool os::release_memory_special(char* base, size_t bytes) {
3433 // detaching the SHM segment will also delete it, see reserve_memory_special()
3434 int rslt = shmdt(base);
3435 return rslt == 0;
3436 }
3437
3438 size_t os::large_page_size() {
3439 return _large_page_size;
3440 }
3441
3442 // MPSS allows application to commit large page memory on demand; with ISM
3443 // the entire memory region must be allocated as shared memory.
3444 bool os::can_commit_large_page_memory() {
3445 return UseISM ? false : true;
3446 }
3447
3448 bool os::can_execute_large_page_memory() {
3449 return UseISM ? false : true;
3450 }
3451
3452 static int os_sleep(jlong millis, bool interruptible) {
3453 const jlong limit = INT_MAX;
3454 jlong prevtime;
3455 int res;
3456
3457 while (millis > limit) {
3458 if ((res = os_sleep(limit, interruptible)) != OS_OK)
3459 return res;
3460 millis -= limit;
3461 }
3462
3463 // Restart interrupted polls with new parameters until the proper delay
3464 // has been completed.
3465
3466 prevtime = getTimeMillis();
3467
3468 while (millis > 0) {
3469 jlong newtime;
3470
3471 if (!interruptible) {
3472 // Following assert fails for os::yield_all:
3473 // assert(!thread->is_Java_thread(), "must not be java thread");
3474 res = poll(NULL, 0, millis);
3475 } else {
3476 JavaThread *jt = JavaThread::current();
3477
3478 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt,
3479 os::Solaris::clear_interrupted);
3480 }
3481
3482 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for
3483 // thread.Interrupt.
3484
3485 // See c/r 6751923. Poll can return 0 before time
3486 // has elapsed if time is set via clock_settime (as NTP does).
3487 // res == 0 if poll timed out (see man poll RETURN VALUES)
3488 // using the logic below checks that we really did
3489 // sleep at least "millis" if not we'll sleep again.
3490 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) {
3491 newtime = getTimeMillis();
3492 assert(newtime >= prevtime, "time moving backwards");
3493 /* Doing prevtime and newtime in microseconds doesn't help precision,
3494 and trying to round up to avoid lost milliseconds can result in a
3495 too-short delay. */
3496 millis -= newtime - prevtime;
3497 if(millis <= 0)
3498 return OS_OK;
3499 prevtime = newtime;
3500 } else
3501 return res;
3502 }
3503
3504 return OS_OK;
3505 }
3506
3507 // Read calls from inside the vm need to perform state transitions
3508 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3509 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3510 }
3511
3512 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3513 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3514 }
3515
3516 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
3517 assert(thread == Thread::current(), "thread consistency check");
3518
3519 // TODO-FIXME: this should be removed.
3520 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock
3521 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate
3522 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving
3523 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel
3524 // is fooled into believing that the system is making progress. In the code below we block the
3525 // the watcher thread while safepoint is in progress so that it would not appear as though the
3526 // system is making progress.
3527 if (!Solaris::T2_libthread() &&
3528 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) {
3529 // We now try to acquire the threads lock. Since this lock is held by the VM thread during
3530 // the entire safepoint, the watcher thread will line up here during the safepoint.
3531 Threads_lock->lock_without_safepoint_check();
3532 Threads_lock->unlock();
3533 }
3534
3535 if (thread->is_Java_thread()) {
3536 // This is a JavaThread so we honor the _thread_blocked protocol
3537 // even for sleeps of 0 milliseconds. This was originally done
3538 // as a workaround for bug 4338139. However, now we also do it
3539 // to honor the suspend-equivalent protocol.
3540
3541 JavaThread *jt = (JavaThread *) thread;
3542 ThreadBlockInVM tbivm(jt);
3543
3544 jt->set_suspend_equivalent();
3545 // cleared by handle_special_suspend_equivalent_condition() or
3546 // java_suspend_self() via check_and_wait_while_suspended()
3547
3548 int ret_code;
3549 if (millis <= 0) {
3550 thr_yield();
3551 ret_code = 0;
3552 } else {
3553 // The original sleep() implementation did not create an
3554 // OSThreadWaitState helper for sleeps of 0 milliseconds.
3555 // I'm preserving that decision for now.
3556 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
3557
3558 ret_code = os_sleep(millis, interruptible);
3559 }
3560
3561 // were we externally suspended while we were waiting?
3562 jt->check_and_wait_while_suspended();
3563
3564 return ret_code;
3565 }
3566
3567 // non-JavaThread from this point on:
3568
3569 if (millis <= 0) {
3570 thr_yield();
3571 return 0;
3572 }
3573
3574 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
3575
3576 return os_sleep(millis, interruptible);
3577 }
3578
3579 int os::naked_sleep() {
3580 // %% make the sleep time an integer flag. for now use 1 millisec.
3581 return os_sleep(1, false);
3582 }
3583
3584 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3585 void os::infinite_sleep() {
3586 while (true) { // sleep forever ...
3587 ::sleep(100); // ... 100 seconds at a time
3588 }
3589 }
3590
3591 // Used to convert frequent JVM_Yield() to nops
3592 bool os::dont_yield() {
3593 if (DontYieldALot) {
3594 static hrtime_t last_time = 0;
3595 hrtime_t diff = getTimeNanos() - last_time;
3596
3597 if (diff < DontYieldALotInterval * 1000000)
3598 return true;
3599
3600 last_time += diff;
3601
3602 return false;
3603 }
3604 else {
3605 return false;
3606 }
3607 }
3608
3609 // Caveat: Solaris os::yield() causes a thread-state transition whereas
3610 // the linux and win32 implementations do not. This should be checked.
3611
3612 void os::yield() {
3613 // Yields to all threads with same or greater priority
3614 os::sleep(Thread::current(), 0, false);
3615 }
3616
3617 // Note that yield semantics are defined by the scheduling class to which
3618 // the thread currently belongs. Typically, yield will _not yield to
3619 // other equal or higher priority threads that reside on the dispatch queues
3620 // of other CPUs.
3621
3622 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
3623
3624
3625 // On Solaris we found that yield_all doesn't always yield to all other threads.
3626 // There have been cases where there is a thread ready to execute but it doesn't
3627 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
3628 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a
3629 // SIGWAITING signal which will cause a new lwp to be created. So we count the
3630 // number of times yield_all is called in the one loop and increase the sleep
3631 // time after 8 attempts. If this fails too we increase the concurrency level
3632 // so that the starving thread would get an lwp
3633
3634 void os::yield_all(int attempts) {
3635 // Yields to all threads, including threads with lower priorities
3636 if (attempts == 0) {
3637 os::sleep(Thread::current(), 1, false);
3638 } else {
3639 int iterations = attempts % 30;
3640 if (iterations == 0 && !os::Solaris::T2_libthread()) {
3641 // thr_setconcurrency and _getconcurrency make sense only under T1.
3642 int noofLWPS = thr_getconcurrency();
3643 if (noofLWPS < (Threads::number_of_threads() + 2)) {
3644 thr_setconcurrency(thr_getconcurrency() + 1);
3645 }
3646 } else if (iterations < 25) {
3647 os::sleep(Thread::current(), 1, false);
3648 } else {
3649 os::sleep(Thread::current(), 10, false);
3650 }
3651 }
3652 }
3653
3654 // Called from the tight loops to possibly influence time-sharing heuristics
3655 void os::loop_breaker(int attempts) {
3656 os::yield_all(attempts);
3657 }
3658
3659
3660 // Interface for setting lwp priorities. If we are using T2 libthread,
3661 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3662 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3663 // function is meaningless in this mode so we must adjust the real lwp's priority
3664 // The routines below implement the getting and setting of lwp priorities.
3665 //
3666 // Note: There are three priority scales used on Solaris. Java priotities
3667 // which range from 1 to 10, libthread "thr_setprio" scale which range
3668 // from 0 to 127, and the current scheduling class of the process we
3669 // are running in. This is typically from -60 to +60.
3670 // The setting of the lwp priorities in done after a call to thr_setprio
3671 // so Java priorities are mapped to libthread priorities and we map from
3672 // the latter to lwp priorities. We don't keep priorities stored in
3673 // Java priorities since some of our worker threads want to set priorities
3674 // higher than all Java threads.
3675 //
3676 // For related information:
3677 // (1) man -s 2 priocntl
3678 // (2) man -s 4 priocntl
3679 // (3) man dispadmin
3680 // = librt.so
3681 // = libthread/common/rtsched.c - thrp_setlwpprio().
3682 // = ps -cL <pid> ... to validate priority.
3683 // = sched_get_priority_min and _max
3684 // pthread_create
3685 // sched_setparam
3686 // pthread_setschedparam
3687 //
3688 // Assumptions:
3689 // + We assume that all threads in the process belong to the same
3690 // scheduling class. IE. an homogenous process.
3691 // + Must be root or in IA group to change change "interactive" attribute.
3692 // Priocntl() will fail silently. The only indication of failure is when
3693 // we read-back the value and notice that it hasn't changed.
3694 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3695 // + For RT, change timeslice as well. Invariant:
3696 // constant "priority integral"
3697 // Konst == TimeSlice * (60-Priority)
3698 // Given a priority, compute appropriate timeslice.
3699 // + Higher numerical values have higher priority.
3700
3701 // sched class attributes
3702 typedef struct {
3703 int schedPolicy; // classID
3704 int maxPrio;
3705 int minPrio;
3706 } SchedInfo;
3707
3708
3709 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3710
3711 #ifdef ASSERT
3712 static int ReadBackValidate = 1;
3713 #endif
3714 static int myClass = 0;
3715 static int myMin = 0;
3716 static int myMax = 0;
3717 static int myCur = 0;
3718 static bool priocntl_enable = false;
3719
3720 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3721 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3722
3723 // Call the version of priocntl suitable for all supported versions
3724 // of Solaris. We need to call through this wrapper so that we can
3725 // build on Solaris 9 and run on Solaris 8, 9 and 10.
3726 //
3727 // This code should be removed if we ever stop supporting Solaris 8
3728 // and earlier releases.
3729
3730 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3731 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3732 static priocntl_type priocntl_ptr = priocntl_stub;
3733
3734 // Stub to set the value of the real pointer, and then call the real
3735 // function.
3736
3737 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) {
3738 // Try Solaris 8- name only.
3739 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl");
3740 guarantee(tmp != NULL, "priocntl function not found.");
3741 priocntl_ptr = tmp;
3742 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg);
3743 }
3744
3745
3746 // lwp_priocntl_init
3747 //
3748 // Try to determine the priority scale for our process.
3749 //
3750 // Return errno or 0 if OK.
3751 //
3752 static
3753 int lwp_priocntl_init ()
3754 {
3755 int rslt;
3756 pcinfo_t ClassInfo;
3757 pcparms_t ParmInfo;
3758 int i;
3759
3760 if (!UseThreadPriorities) return 0;
3761
3762 // We are using Bound threads, we need to determine our priority ranges
3763 if (os::Solaris::T2_libthread() || UseBoundThreads) {
3764 // If ThreadPriorityPolicy is 1, switch tables
3765 if (ThreadPriorityPolicy == 1) {
3766 for (i = 0 ; i < CriticalPriority+1; i++)
3767 os::java_to_os_priority[i] = prio_policy1[i];
3768 }
3769 if (UseCriticalJavaThreadPriority) {
3770 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3771 // See set_native_priority() and set_lwp_class_and_priority().
3772 // Save original MaxPriority mapping in case attempt to
3773 // use critical priority fails.
3774 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3775 // Set negative to distinguish from other priorities
3776 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3777 }
3778 }
3779 // Not using Bound Threads, set to ThreadPolicy 1
3780 else {
3781 for ( i = 0 ; i < CriticalPriority+1; i++ ) {
3782 os::java_to_os_priority[i] = prio_policy1[i];
3783 }
3784 return 0;
3785 }
3786
3787 // Get IDs for a set of well-known scheduling classes.
3788 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3789 // the system. We should have a loop that iterates over the
3790 // classID values, which are known to be "small" integers.
3791
3792 strcpy(ClassInfo.pc_clname, "TS");
3793 ClassInfo.pc_cid = -1;
3794 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3795 if (rslt < 0) return errno;
3796 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3797 tsLimits.schedPolicy = ClassInfo.pc_cid;
3798 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3799 tsLimits.minPrio = -tsLimits.maxPrio;
3800
3801 strcpy(ClassInfo.pc_clname, "IA");
3802 ClassInfo.pc_cid = -1;
3803 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3804 if (rslt < 0) return errno;
3805 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3806 iaLimits.schedPolicy = ClassInfo.pc_cid;
3807 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3808 iaLimits.minPrio = -iaLimits.maxPrio;
3809
3810 strcpy(ClassInfo.pc_clname, "RT");
3811 ClassInfo.pc_cid = -1;
3812 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3813 if (rslt < 0) return errno;
3814 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3815 rtLimits.schedPolicy = ClassInfo.pc_cid;
3816 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3817 rtLimits.minPrio = 0;
3818
3819 strcpy(ClassInfo.pc_clname, "FX");
3820 ClassInfo.pc_cid = -1;
3821 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3822 if (rslt < 0) return errno;
3823 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3824 fxLimits.schedPolicy = ClassInfo.pc_cid;
3825 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3826 fxLimits.minPrio = 0;
3827
3828 // Query our "current" scheduling class.
3829 // This will normally be IA, TS or, rarely, FX or RT.
3830 memset(&ParmInfo, 0, sizeof(ParmInfo));
3831 ParmInfo.pc_cid = PC_CLNULL;
3832 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3833 if (rslt < 0) return errno;
3834 myClass = ParmInfo.pc_cid;
3835
3836 // We now know our scheduling classId, get specific information
3837 // about the class.
3838 ClassInfo.pc_cid = myClass;
3839 ClassInfo.pc_clname[0] = 0;
3840 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3841 if (rslt < 0) return errno;
3842
3843 if (ThreadPriorityVerbose) {
3844 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3845 }
3846
3847 memset(&ParmInfo, 0, sizeof(pcparms_t));
3848 ParmInfo.pc_cid = PC_CLNULL;
3849 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3850 if (rslt < 0) return errno;
3851
3852 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3853 myMin = rtLimits.minPrio;
3854 myMax = rtLimits.maxPrio;
3855 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3856 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3857 myMin = iaLimits.minPrio;
3858 myMax = iaLimits.maxPrio;
3859 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3860 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3861 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3862 myMin = tsLimits.minPrio;
3863 myMax = tsLimits.maxPrio;
3864 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3865 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3866 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3867 myMin = fxLimits.minPrio;
3868 myMax = fxLimits.maxPrio;
3869 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3870 } else {
3871 // No clue - punt
3872 if (ThreadPriorityVerbose)
3873 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
3874 return EINVAL; // no clue, punt
3875 }
3876
3877 if (ThreadPriorityVerbose) {
3878 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
3879 }
3880
3881 priocntl_enable = true; // Enable changing priorities
3882 return 0;
3883 }
3884
3885 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3886 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3887 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3888 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3889
3890
3891 // scale_to_lwp_priority
3892 //
3893 // Convert from the libthread "thr_setprio" scale to our current
3894 // lwp scheduling class scale.
3895 //
3896 static
3897 int scale_to_lwp_priority (int rMin, int rMax, int x)
3898 {
3899 int v;
3900
3901 if (x == 127) return rMax; // avoid round-down
3902 v = (((x*(rMax-rMin)))/128)+rMin;
3903 return v;
3904 }
3905
3906
3907 // set_lwp_class_and_priority
3908 //
3909 // Set the class and priority of the lwp. This call should only
3910 // be made when using bound threads (T2 threads are bound by default).
3911 //
3912 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3913 int newPrio, int new_class, bool scale) {
3914 int rslt;
3915 int Actual, Expected, prv;
3916 pcparms_t ParmInfo; // for GET-SET
3917 #ifdef ASSERT
3918 pcparms_t ReadBack; // for readback
3919 #endif
3920
3921 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3922 // Query current values.
3923 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3924 // Cache "pcparms_t" in global ParmCache.
3925 // TODO: elide set-to-same-value
3926
3927 // If something went wrong on init, don't change priorities.
3928 if ( !priocntl_enable ) {
3929 if (ThreadPriorityVerbose)
3930 tty->print_cr("Trying to set priority but init failed, ignoring");
3931 return EINVAL;
3932 }
3933
3934 // If lwp hasn't started yet, just return
3935 // the _start routine will call us again.
3936 if ( lwpid <= 0 ) {
3937 if (ThreadPriorityVerbose) {
3938 tty->print_cr ("deferring the set_lwp_class_and_priority of thread "
3939 INTPTR_FORMAT " to %d, lwpid not set",
3940 ThreadID, newPrio);
3941 }
3942 return 0;
3943 }
3944
3945 if (ThreadPriorityVerbose) {
3946 tty->print_cr ("set_lwp_class_and_priority("
3947 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3948 ThreadID, lwpid, newPrio);
3949 }
3950
3951 memset(&ParmInfo, 0, sizeof(pcparms_t));
3952 ParmInfo.pc_cid = PC_CLNULL;
3953 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3954 if (rslt < 0) return errno;
3955
3956 int cur_class = ParmInfo.pc_cid;
3957 ParmInfo.pc_cid = (id_t)new_class;
3958
3959 if (new_class == rtLimits.schedPolicy) {
3960 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3961 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3962 rtLimits.maxPrio, newPrio)
3963 : newPrio;
3964 rtInfo->rt_tqsecs = RT_NOCHANGE;
3965 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3966 if (ThreadPriorityVerbose) {
3967 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3968 }
3969 } else if (new_class == iaLimits.schedPolicy) {
3970 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3971 int maxClamped = MIN2(iaLimits.maxPrio,
3972 cur_class == new_class
3973 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3974 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3975 maxClamped, newPrio)
3976 : newPrio;
3977 iaInfo->ia_uprilim = cur_class == new_class
3978 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3979 iaInfo->ia_mode = IA_NOCHANGE;
3980 if (ThreadPriorityVerbose) {
3981 tty->print_cr("IA: [%d...%d] %d->%d\n",
3982 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3983 }
3984 } else if (new_class == tsLimits.schedPolicy) {
3985 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3986 int maxClamped = MIN2(tsLimits.maxPrio,
3987 cur_class == new_class
3988 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3989 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3990 maxClamped, newPrio)
3991 : newPrio;
3992 tsInfo->ts_uprilim = cur_class == new_class
3993 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3994 if (ThreadPriorityVerbose) {
3995 tty->print_cr("TS: [%d...%d] %d->%d\n",
3996 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3997 }
3998 } else if (new_class == fxLimits.schedPolicy) {
3999 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
4000 int maxClamped = MIN2(fxLimits.maxPrio,
4001 cur_class == new_class
4002 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
4003 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
4004 maxClamped, newPrio)
4005 : newPrio;
4006 fxInfo->fx_uprilim = cur_class == new_class
4007 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
4008 fxInfo->fx_tqsecs = FX_NOCHANGE;
4009 fxInfo->fx_tqnsecs = FX_NOCHANGE;
4010 if (ThreadPriorityVerbose) {
4011 tty->print_cr("FX: [%d...%d] %d->%d\n",
4012 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
4013 }
4014 } else {
4015 if (ThreadPriorityVerbose) {
4016 tty->print_cr("Unknown new scheduling class %d\n", new_class);
4017 }
4018 return EINVAL; // no clue, punt
4019 }
4020
4021 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
4022 if (ThreadPriorityVerbose && rslt) {
4023 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
4024 }
4025 if (rslt < 0) return errno;
4026
4027 #ifdef ASSERT
4028 // Sanity check: read back what we just attempted to set.
4029 // In theory it could have changed in the interim ...
4030 //
4031 // The priocntl system call is tricky.
4032 // Sometimes it'll validate the priority value argument and
4033 // return EINVAL if unhappy. At other times it fails silently.
4034 // Readbacks are prudent.
4035
4036 if (!ReadBackValidate) return 0;
4037
4038 memset(&ReadBack, 0, sizeof(pcparms_t));
4039 ReadBack.pc_cid = PC_CLNULL;
4040 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
4041 assert(rslt >= 0, "priocntl failed");
4042 Actual = Expected = 0xBAD;
4043 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
4044 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
4045 Actual = RTPRI(ReadBack)->rt_pri;
4046 Expected = RTPRI(ParmInfo)->rt_pri;
4047 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
4048 Actual = IAPRI(ReadBack)->ia_upri;
4049 Expected = IAPRI(ParmInfo)->ia_upri;
4050 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
4051 Actual = TSPRI(ReadBack)->ts_upri;
4052 Expected = TSPRI(ParmInfo)->ts_upri;
4053 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
4054 Actual = FXPRI(ReadBack)->fx_upri;
4055 Expected = FXPRI(ParmInfo)->fx_upri;
4056 } else {
4057 if (ThreadPriorityVerbose) {
4058 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
4059 ParmInfo.pc_cid);
4060 }
4061 }
4062
4063 if (Actual != Expected) {
4064 if (ThreadPriorityVerbose) {
4065 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
4066 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
4067 }
4068 }
4069 #endif
4070
4071 return 0;
4072 }
4073
4074 // Solaris only gives access to 128 real priorities at a time,
4075 // so we expand Java's ten to fill this range. This would be better
4076 // if we dynamically adjusted relative priorities.
4077 //
4078 // The ThreadPriorityPolicy option allows us to select 2 different
4079 // priority scales.
4080 //
4081 // ThreadPriorityPolicy=0
4082 // Since the Solaris' default priority is MaximumPriority, we do not
4083 // set a priority lower than Max unless a priority lower than
4084 // NormPriority is requested.
4085 //
4086 // ThreadPriorityPolicy=1
4087 // This mode causes the priority table to get filled with
4088 // linear values. NormPriority get's mapped to 50% of the
4089 // Maximum priority an so on. This will cause VM threads
4090 // to get unfair treatment against other Solaris processes
4091 // which do not explicitly alter their thread priorities.
4092 //
4093
4094 int os::java_to_os_priority[CriticalPriority + 1] = {
4095 -99999, // 0 Entry should never be used
4096
4097 0, // 1 MinPriority
4098 32, // 2
4099 64, // 3
4100
4101 96, // 4
4102 127, // 5 NormPriority
4103 127, // 6
4104
4105 127, // 7
4106 127, // 8
4107 127, // 9 NearMaxPriority
4108
4109 127, // 10 MaxPriority
4110
4111 -criticalPrio // 11 CriticalPriority
4112 };
4113
4114 OSReturn os::set_native_priority(Thread* thread, int newpri) {
4115 OSThread* osthread = thread->osthread();
4116
4117 // Save requested priority in case the thread hasn't been started
4118 osthread->set_native_priority(newpri);
4119
4120 // Check for critical priority request
4121 bool fxcritical = false;
4122 if (newpri == -criticalPrio) {
4123 fxcritical = true;
4124 newpri = criticalPrio;
4125 }
4126
4127 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
4128 if (!UseThreadPriorities) return OS_OK;
4129
4130 int status = 0;
4131
4132 if (!fxcritical) {
4133 // Use thr_setprio only if we have a priority that thr_setprio understands
4134 status = thr_setprio(thread->osthread()->thread_id(), newpri);
4135 }
4136
4137 if (os::Solaris::T2_libthread() ||
4138 (UseBoundThreads && osthread->is_vm_created())) {
4139 int lwp_status =
4140 set_lwp_class_and_priority(osthread->thread_id(),
4141 osthread->lwp_id(),
4142 newpri,
4143 fxcritical ? fxLimits.schedPolicy : myClass,
4144 !fxcritical);
4145 if (lwp_status != 0 && fxcritical) {
4146 // Try again, this time without changing the scheduling class
4147 newpri = java_MaxPriority_to_os_priority;
4148 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
4149 osthread->lwp_id(),
4150 newpri, myClass, false);
4151 }
4152 status |= lwp_status;
4153 }
4154 return (status == 0) ? OS_OK : OS_ERR;
4155 }
4156
4157
4158 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
4159 int p;
4160 if ( !UseThreadPriorities ) {
4161 *priority_ptr = NormalPriority;
4162 return OS_OK;
4163 }
4164 int status = thr_getprio(thread->osthread()->thread_id(), &p);
4165 if (status != 0) {
4166 return OS_ERR;
4167 }
4168 *priority_ptr = p;
4169 return OS_OK;
4170 }
4171
4172
4173 // Hint to the underlying OS that a task switch would not be good.
4174 // Void return because it's a hint and can fail.
4175 void os::hint_no_preempt() {
4176 schedctl_start(schedctl_init());
4177 }
4178
4179 void os::interrupt(Thread* thread) {
4180 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4181
4182 OSThread* osthread = thread->osthread();
4183
4184 int isInterrupted = osthread->interrupted();
4185 if (!isInterrupted) {
4186 osthread->set_interrupted(true);
4187 OrderAccess::fence();
4188 // os::sleep() is implemented with either poll (NULL,0,timeout) or
4189 // by parking on _SleepEvent. If the former, thr_kill will unwedge
4190 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper.
4191 ParkEvent * const slp = thread->_SleepEvent ;
4192 if (slp != NULL) slp->unpark() ;
4193 }
4194
4195 // For JSR166: unpark after setting status but before thr_kill -dl
4196 if (thread->is_Java_thread()) {
4197 ((JavaThread*)thread)->parker()->unpark();
4198 }
4199
4200 // Handle interruptible wait() ...
4201 ParkEvent * const ev = thread->_ParkEvent ;
4202 if (ev != NULL) ev->unpark() ;
4203
4204 // When events are used everywhere for os::sleep, then this thr_kill
4205 // will only be needed if UseVMInterruptibleIO is true.
4206
4207 if (!isInterrupted) {
4208 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt());
4209 assert_status(status == 0, status, "thr_kill");
4210
4211 // Bump thread interruption counter
4212 RuntimeService::record_thread_interrupt_signaled_count();
4213 }
4214 }
4215
4216
4217 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
4218 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4219
4220 OSThread* osthread = thread->osthread();
4221
4222 bool res = osthread->interrupted();
4223
4224 // NOTE that since there is no "lock" around these two operations,
4225 // there is the possibility that the interrupted flag will be
4226 // "false" but that the interrupt event will be set. This is
4227 // intentional. The effect of this is that Object.wait() will appear
4228 // to have a spurious wakeup, which is not harmful, and the
4229 // possibility is so rare that it is not worth the added complexity
4230 // to add yet another lock. It has also been recommended not to put
4231 // the interrupted flag into the os::Solaris::Event structure,
4232 // because it hides the issue.
4233 if (res && clear_interrupted) {
4234 osthread->set_interrupted(false);
4235 }
4236 return res;
4237 }
4238
4239
4240 void os::print_statistics() {
4241 }
4242
4243 int os::message_box(const char* title, const char* message) {
4244 int i;
4245 fdStream err(defaultStream::error_fd());
4246 for (i = 0; i < 78; i++) err.print_raw("=");
4247 err.cr();
4248 err.print_raw_cr(title);
4249 for (i = 0; i < 78; i++) err.print_raw("-");
4250 err.cr();
4251 err.print_raw_cr(message);
4252 for (i = 0; i < 78; i++) err.print_raw("=");
4253 err.cr();
4254
4255 char buf[16];
4256 // Prevent process from exiting upon "read error" without consuming all CPU
4257 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
4258
4259 return buf[0] == 'y' || buf[0] == 'Y';
4260 }
4261
4262 // A lightweight implementation that does not suspend the target thread and
4263 // thus returns only a hint. Used for profiling only!
4264 ExtendedPC os::get_thread_pc(Thread* thread) {
4265 // Make sure that it is called by the watcher and the Threads lock is owned.
4266 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
4267 // For now, is only used to profile the VM Thread
4268 assert(thread->is_VM_thread(), "Can only be called for VMThread");
4269 ExtendedPC epc;
4270
4271 GetThreadPC_Callback cb(ProfileVM_lock);
4272 OSThread *osthread = thread->osthread();
4273 const int time_to_wait = 400; // 400ms wait for initial response
4274 int status = cb.interrupt(thread, time_to_wait);
4275
4276 if (cb.is_done() ) {
4277 epc = cb.addr();
4278 } else {
4279 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status",
4280 osthread->thread_id(), status););
4281 // epc is already NULL
4282 }
4283 return epc;
4284 }
4285
4286
4287 // This does not do anything on Solaris. This is basically a hook for being
4288 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
4289 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
4290 f(value, method, args, thread);
4291 }
4292
4293 // This routine may be used by user applications as a "hook" to catch signals.
4294 // The user-defined signal handler must pass unrecognized signals to this
4295 // routine, and if it returns true (non-zero), then the signal handler must
4296 // return immediately. If the flag "abort_if_unrecognized" is true, then this
4297 // routine will never retun false (zero), but instead will execute a VM panic
4298 // routine kill the process.
4299 //
4300 // If this routine returns false, it is OK to call it again. This allows
4301 // the user-defined signal handler to perform checks either before or after
4302 // the VM performs its own checks. Naturally, the user code would be making
4303 // a serious error if it tried to handle an exception (such as a null check
4304 // or breakpoint) that the VM was generating for its own correct operation.
4305 //
4306 // This routine may recognize any of the following kinds of signals:
4307 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
4308 // os::Solaris::SIGasync
4309 // It should be consulted by handlers for any of those signals.
4310 // It explicitly does not recognize os::Solaris::SIGinterrupt
4311 //
4312 // The caller of this routine must pass in the three arguments supplied
4313 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
4314 // field of the structure passed to sigaction(). This routine assumes that
4315 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
4316 //
4317 // Note that the VM will print warnings if it detects conflicting signal
4318 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
4319 //
4320 extern "C" JNIEXPORT int
4321 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext,
4322 int abort_if_unrecognized);
4323
4324
4325 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
4326 JVM_handle_solaris_signal(sig, info, ucVoid, true);
4327 }
4328
4329 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
4330 is needed to provoke threads blocked on IO to return an EINTR
4331 Note: this explicitly does NOT call JVM_handle_solaris_signal and
4332 does NOT participate in signal chaining due to requirement for
4333 NOT setting SA_RESTART to make EINTR work. */
4334 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
4335 if (UseSignalChaining) {
4336 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
4337 if (actp && actp->sa_handler) {
4338 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
4339 }
4340 }
4341 }
4342
4343 // This boolean allows users to forward their own non-matching signals
4344 // to JVM_handle_solaris_signal, harmlessly.
4345 bool os::Solaris::signal_handlers_are_installed = false;
4346
4347 // For signal-chaining
4348 bool os::Solaris::libjsig_is_loaded = false;
4349 typedef struct sigaction *(*get_signal_t)(int);
4350 get_signal_t os::Solaris::get_signal_action = NULL;
4351
4352 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
4353 struct sigaction *actp = NULL;
4354
4355 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
4356 // Retrieve the old signal handler from libjsig
4357 actp = (*get_signal_action)(sig);
4358 }
4359 if (actp == NULL) {
4360 // Retrieve the preinstalled signal handler from jvm
4361 actp = get_preinstalled_handler(sig);
4362 }
4363
4364 return actp;
4365 }
4366
4367 static bool call_chained_handler(struct sigaction *actp, int sig,
4368 siginfo_t *siginfo, void *context) {
4369 // Call the old signal handler
4370 if (actp->sa_handler == SIG_DFL) {
4371 // It's more reasonable to let jvm treat it as an unexpected exception
4372 // instead of taking the default action.
4373 return false;
4374 } else if (actp->sa_handler != SIG_IGN) {
4375 if ((actp->sa_flags & SA_NODEFER) == 0) {
4376 // automaticlly block the signal
4377 sigaddset(&(actp->sa_mask), sig);
4378 }
4379
4380 sa_handler_t hand;
4381 sa_sigaction_t sa;
4382 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4383 // retrieve the chained handler
4384 if (siginfo_flag_set) {
4385 sa = actp->sa_sigaction;
4386 } else {
4387 hand = actp->sa_handler;
4388 }
4389
4390 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4391 actp->sa_handler = SIG_DFL;
4392 }
4393
4394 // try to honor the signal mask
4395 sigset_t oset;
4396 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4397
4398 // call into the chained handler
4399 if (siginfo_flag_set) {
4400 (*sa)(sig, siginfo, context);
4401 } else {
4402 (*hand)(sig);
4403 }
4404
4405 // restore the signal mask
4406 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4407 }
4408 // Tell jvm's signal handler the signal is taken care of.
4409 return true;
4410 }
4411
4412 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4413 bool chained = false;
4414 // signal-chaining
4415 if (UseSignalChaining) {
4416 struct sigaction *actp = get_chained_signal_action(sig);
4417 if (actp != NULL) {
4418 chained = call_chained_handler(actp, sig, siginfo, context);
4419 }
4420 }
4421 return chained;
4422 }
4423
4424 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4425 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4426 if (preinstalled_sigs[sig] != 0) {
4427 return &chainedsigactions[sig];
4428 }
4429 return NULL;
4430 }
4431
4432 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
4433
4434 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4435 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4436 chainedsigactions[sig] = oldAct;
4437 preinstalled_sigs[sig] = 1;
4438 }
4439
4440 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
4441 // Check for overwrite.
4442 struct sigaction oldAct;
4443 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4444 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4445 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4446 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4447 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4448 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4449 if (AllowUserSignalHandlers || !set_installed) {
4450 // Do not overwrite; user takes responsibility to forward to us.
4451 return;
4452 } else if (UseSignalChaining) {
4453 if (oktochain) {
4454 // save the old handler in jvm
4455 save_preinstalled_handler(sig, oldAct);
4456 } else {
4457 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4458 }
4459 // libjsig also interposes the sigaction() call below and saves the
4460 // old sigaction on it own.
4461 } else {
4462 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4463 "%#lx for signal %d.", (long)oldhand, sig));
4464 }
4465 }
4466
4467 struct sigaction sigAct;
4468 sigfillset(&(sigAct.sa_mask));
4469 sigAct.sa_handler = SIG_DFL;
4470
4471 sigAct.sa_sigaction = signalHandler;
4472 // Handle SIGSEGV on alternate signal stack if
4473 // not using stack banging
4474 if (!UseStackBanging && sig == SIGSEGV) {
4475 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4476 // Interruptible i/o requires SA_RESTART cleared so EINTR
4477 // is returned instead of restarting system calls
4478 } else if (sig == os::Solaris::SIGinterrupt()) {
4479 sigemptyset(&sigAct.sa_mask);
4480 sigAct.sa_handler = NULL;
4481 sigAct.sa_flags = SA_SIGINFO;
4482 sigAct.sa_sigaction = sigINTRHandler;
4483 } else {
4484 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4485 }
4486 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4487
4488 sigaction(sig, &sigAct, &oldAct);
4489
4490 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4491 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4492 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4493 }
4494
4495
4496 #define DO_SIGNAL_CHECK(sig) \
4497 if (!sigismember(&check_signal_done, sig)) \
4498 os::Solaris::check_signal_handler(sig)
4499
4500 // This method is a periodic task to check for misbehaving JNI applications
4501 // under CheckJNI, we can add any periodic checks here
4502
4503 void os::run_periodic_checks() {
4504 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4505 // thereby preventing a NULL checks.
4506 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
4507
4508 if (check_signals == false) return;
4509
4510 // SEGV and BUS if overridden could potentially prevent
4511 // generation of hs*.log in the event of a crash, debugging
4512 // such a case can be very challenging, so we absolutely
4513 // check for the following for a good measure:
4514 DO_SIGNAL_CHECK(SIGSEGV);
4515 DO_SIGNAL_CHECK(SIGILL);
4516 DO_SIGNAL_CHECK(SIGFPE);
4517 DO_SIGNAL_CHECK(SIGBUS);
4518 DO_SIGNAL_CHECK(SIGPIPE);
4519 DO_SIGNAL_CHECK(SIGXFSZ);
4520
4521 // ReduceSignalUsage allows the user to override these handlers
4522 // see comments at the very top and jvm_solaris.h
4523 if (!ReduceSignalUsage) {
4524 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4525 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4526 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4527 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4528 }
4529
4530 // See comments above for using JVM1/JVM2 and UseAltSigs
4531 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4532 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4533
4534 }
4535
4536 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4537
4538 static os_sigaction_t os_sigaction = NULL;
4539
4540 void os::Solaris::check_signal_handler(int sig) {
4541 char buf[O_BUFLEN];
4542 address jvmHandler = NULL;
4543
4544 struct sigaction act;
4545 if (os_sigaction == NULL) {
4546 // only trust the default sigaction, in case it has been interposed
4547 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4548 if (os_sigaction == NULL) return;
4549 }
4550
4551 os_sigaction(sig, (struct sigaction*)NULL, &act);
4552
4553 address thisHandler = (act.sa_flags & SA_SIGINFO)
4554 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4555 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
4556
4557
4558 switch(sig) {
4559 case SIGSEGV:
4560 case SIGBUS:
4561 case SIGFPE:
4562 case SIGPIPE:
4563 case SIGXFSZ:
4564 case SIGILL:
4565 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4566 break;
4567
4568 case SHUTDOWN1_SIGNAL:
4569 case SHUTDOWN2_SIGNAL:
4570 case SHUTDOWN3_SIGNAL:
4571 case BREAK_SIGNAL:
4572 jvmHandler = (address)user_handler();
4573 break;
4574
4575 default:
4576 int intrsig = os::Solaris::SIGinterrupt();
4577 int asynsig = os::Solaris::SIGasync();
4578
4579 if (sig == intrsig) {
4580 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4581 } else if (sig == asynsig) {
4582 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4583 } else {
4584 return;
4585 }
4586 break;
4587 }
4588
4589
4590 if (thisHandler != jvmHandler) {
4591 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4592 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4593 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4594 // No need to check this sig any longer
4595 sigaddset(&check_signal_done, sig);
4596 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4597 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4598 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4599 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4600 // No need to check this sig any longer
4601 sigaddset(&check_signal_done, sig);
4602 }
4603
4604 // Print all the signal handler state
4605 if (sigismember(&check_signal_done, sig)) {
4606 print_signal_handlers(tty, buf, O_BUFLEN);
4607 }
4608
4609 }
4610
4611 void os::Solaris::install_signal_handlers() {
4612 bool libjsigdone = false;
4613 signal_handlers_are_installed = true;
4614
4615 // signal-chaining
4616 typedef void (*signal_setting_t)();
4617 signal_setting_t begin_signal_setting = NULL;
4618 signal_setting_t end_signal_setting = NULL;
4619 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4620 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4621 if (begin_signal_setting != NULL) {
4622 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4623 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4624 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4625 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4626 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4627 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4628 libjsig_is_loaded = true;
4629 if (os::Solaris::get_libjsig_version != NULL) {
4630 libjsigversion = (*os::Solaris::get_libjsig_version)();
4631 }
4632 assert(UseSignalChaining, "should enable signal-chaining");
4633 }
4634 if (libjsig_is_loaded) {
4635 // Tell libjsig jvm is setting signal handlers
4636 (*begin_signal_setting)();
4637 }
4638
4639 set_signal_handler(SIGSEGV, true, true);
4640 set_signal_handler(SIGPIPE, true, true);
4641 set_signal_handler(SIGXFSZ, true, true);
4642 set_signal_handler(SIGBUS, true, true);
4643 set_signal_handler(SIGILL, true, true);
4644 set_signal_handler(SIGFPE, true, true);
4645
4646
4647 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4648
4649 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4650 // can not register overridable signals which might be > 32
4651 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4652 // Tell libjsig jvm has finished setting signal handlers
4653 (*end_signal_setting)();
4654 libjsigdone = true;
4655 }
4656 }
4657
4658 // Never ok to chain our SIGinterrupt
4659 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4660 set_signal_handler(os::Solaris::SIGasync(), true, true);
4661
4662 if (libjsig_is_loaded && !libjsigdone) {
4663 // Tell libjsig jvm finishes setting signal handlers
4664 (*end_signal_setting)();
4665 }
4666
4667 // We don't activate signal checker if libjsig is in place, we trust ourselves
4668 // and if UserSignalHandler is installed all bets are off.
4669 // Log that signal checking is off only if -verbose:jni is specified.
4670 if (CheckJNICalls) {
4671 if (libjsig_is_loaded) {
4672 if (PrintJNIResolving) {
4673 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4674 }
4675 check_signals = false;
4676 }
4677 if (AllowUserSignalHandlers) {
4678 if (PrintJNIResolving) {
4679 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4680 }
4681 check_signals = false;
4682 }
4683 }
4684 }
4685
4686
4687 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
4688
4689 const char * signames[] = {
4690 "SIG0",
4691 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4692 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4693 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4694 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4695 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4696 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4697 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4698 "SIGCANCEL", "SIGLOST"
4699 };
4700
4701 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4702 if (0 < exception_code && exception_code <= SIGRTMAX) {
4703 // signal
4704 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4705 jio_snprintf(buf, size, "%s", signames[exception_code]);
4706 } else {
4707 jio_snprintf(buf, size, "SIG%d", exception_code);
4708 }
4709 return buf;
4710 } else {
4711 return NULL;
4712 }
4713 }
4714
4715 // (Static) wrappers for the new libthread API
4716 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
4717 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
4718 int_fnP_thread_t_i os::Solaris::_thr_setmutator;
4719 int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
4720 int_fnP_thread_t os::Solaris::_thr_continue_mutator;
4721
4722 // (Static) wrapper for getisax(2) call.
4723 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4724
4725 // (Static) wrappers for the liblgrp API
4726 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4727 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4728 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4729 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4730 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4731 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4732 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4733 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4734 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4735
4736 // (Static) wrapper for meminfo() call.
4737 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4738
4739 static address resolve_symbol_lazy(const char* name) {
4740 address addr = (address) dlsym(RTLD_DEFAULT, name);
4741 if(addr == NULL) {
4742 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4743 addr = (address) dlsym(RTLD_NEXT, name);
4744 }
4745 return addr;
4746 }
4747
4748 static address resolve_symbol(const char* name) {
4749 address addr = resolve_symbol_lazy(name);
4750 if(addr == NULL) {
4751 fatal(dlerror());
4752 }
4753 return addr;
4754 }
4755
4756
4757
4758 // isT2_libthread()
4759 //
4760 // Routine to determine if we are currently using the new T2 libthread.
4761 //
4762 // We determine if we are using T2 by reading /proc/self/lstatus and
4763 // looking for a thread with the ASLWP bit set. If we find this status
4764 // bit set, we must assume that we are NOT using T2. The T2 team
4765 // has approved this algorithm.
4766 //
4767 // We need to determine if we are running with the new T2 libthread
4768 // since setting native thread priorities is handled differently
4769 // when using this library. All threads created using T2 are bound
4770 // threads. Calling thr_setprio is meaningless in this case.
4771 //
4772 bool isT2_libthread() {
4773 static prheader_t * lwpArray = NULL;
4774 static int lwpSize = 0;
4775 static int lwpFile = -1;
4776 lwpstatus_t * that;
4777 char lwpName [128];
4778 bool isT2 = false;
4779
4780 #define ADR(x) ((uintptr_t)(x))
4781 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
4782
4783 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0);
4784 if (lwpFile < 0) {
4785 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n");
4786 return false;
4787 }
4788 lwpSize = 16*1024;
4789 for (;;) {
4790 ::lseek64 (lwpFile, 0, SEEK_SET);
4791 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize, mtInternal);
4792 if (::read(lwpFile, lwpArray, lwpSize) < 0) {
4793 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n");
4794 break;
4795 }
4796 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
4797 // We got a good snapshot - now iterate over the list.
4798 int aslwpcount = 0;
4799 for (int i = 0; i < lwpArray->pr_nent; i++ ) {
4800 that = LWPINDEX(lwpArray,i);
4801 if (that->pr_flags & PR_ASLWP) {
4802 aslwpcount++;
4803 }
4804 }
4805 if (aslwpcount == 0) isT2 = true;
4806 break;
4807 }
4808 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
4809 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); // retry.
4810 }
4811
4812 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal);
4813 ::close (lwpFile);
4814 if (ThreadPriorityVerbose) {
4815 if (isT2) tty->print_cr("We are running with a T2 libthread\n");
4816 else tty->print_cr("We are not running with a T2 libthread\n");
4817 }
4818 return isT2;
4819 }
4820
4821
4822 void os::Solaris::libthread_init() {
4823 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4824
4825 // Determine if we are running with the new T2 libthread
4826 os::Solaris::set_T2_libthread(isT2_libthread());
4827
4828 lwp_priocntl_init();
4829
4830 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4831 if(func == NULL) {
4832 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4833 // Guarantee that this VM is running on an new enough OS (5.6 or
4834 // later) that it will have a new enough libthread.so.
4835 guarantee(func != NULL, "libthread.so is too old.");
4836 }
4837
4838 // Initialize the new libthread getstate API wrappers
4839 func = resolve_symbol("thr_getstate");
4840 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
4841
4842 func = resolve_symbol("thr_setstate");
4843 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
4844
4845 func = resolve_symbol("thr_setmutator");
4846 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
4847
4848 func = resolve_symbol("thr_suspend_mutator");
4849 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4850
4851 func = resolve_symbol("thr_continue_mutator");
4852 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4853
4854 int size;
4855 void (*handler_info_func)(address *, int *);
4856 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4857 handler_info_func(&handler_start, &size);
4858 handler_end = handler_start + size;
4859 }
4860
4861
4862 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4863 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4864 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4865 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4866 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4867 int os::Solaris::_mutex_scope = USYNC_THREAD;
4868
4869 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4870 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4871 int_fnP_cond_tP os::Solaris::_cond_signal;
4872 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4873 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4874 int_fnP_cond_tP os::Solaris::_cond_destroy;
4875 int os::Solaris::_cond_scope = USYNC_THREAD;
4876
4877 void os::Solaris::synchronization_init() {
4878 if(UseLWPSynchronization) {
4879 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4880 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4881 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4882 os::Solaris::set_mutex_init(lwp_mutex_init);
4883 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4884 os::Solaris::set_mutex_scope(USYNC_THREAD);
4885
4886 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4887 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4888 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4889 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4890 os::Solaris::set_cond_init(lwp_cond_init);
4891 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4892 os::Solaris::set_cond_scope(USYNC_THREAD);
4893 }
4894 else {
4895 os::Solaris::set_mutex_scope(USYNC_THREAD);
4896 os::Solaris::set_cond_scope(USYNC_THREAD);
4897
4898 if(UsePthreads) {
4899 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4900 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4901 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4902 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4903 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4904
4905 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4906 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4907 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4908 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4909 os::Solaris::set_cond_init(pthread_cond_default_init);
4910 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4911 }
4912 else {
4913 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4914 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4915 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4916 os::Solaris::set_mutex_init(::mutex_init);
4917 os::Solaris::set_mutex_destroy(::mutex_destroy);
4918
4919 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4920 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4921 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4922 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4923 os::Solaris::set_cond_init(::cond_init);
4924 os::Solaris::set_cond_destroy(::cond_destroy);
4925 }
4926 }
4927 }
4928
4929 bool os::Solaris::liblgrp_init() {
4930 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4931 if (handle != NULL) {
4932 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4933 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4934 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4935 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4936 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4937 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4938 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4939 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4940 dlsym(handle, "lgrp_cookie_stale")));
4941
4942 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4943 set_lgrp_cookie(c);
4944 return true;
4945 }
4946 return false;
4947 }
4948
4949 void os::Solaris::misc_sym_init() {
4950 address func;
4951
4952 // getisax
4953 func = resolve_symbol_lazy("getisax");
4954 if (func != NULL) {
4955 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4956 }
4957
4958 // meminfo
4959 func = resolve_symbol_lazy("meminfo");
4960 if (func != NULL) {
4961 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4962 }
4963 }
4964
4965 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4966 assert(_getisax != NULL, "_getisax not set");
4967 return _getisax(array, n);
4968 }
4969
4970 // Symbol doesn't exist in Solaris 8 pset.h
4971 #ifndef PS_MYID
4972 #define PS_MYID -3
4973 #endif
4974
4975 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4976 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4977 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4978
4979 void init_pset_getloadavg_ptr(void) {
4980 pset_getloadavg_ptr =
4981 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4982 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4983 warning("pset_getloadavg function not found");
4984 }
4985 }
4986
4987 int os::Solaris::_dev_zero_fd = -1;
4988
4989 // this is called _before_ the global arguments have been parsed
4990 void os::init(void) {
4991 _initial_pid = getpid();
4992
4993 max_hrtime = first_hrtime = gethrtime();
4994
4995 init_random(1234567);
4996
4997 page_size = sysconf(_SC_PAGESIZE);
4998 if (page_size == -1)
4999 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
5000 strerror(errno)));
5001 init_page_sizes((size_t) page_size);
5002
5003 Solaris::initialize_system_info();
5004
5005 // Initialize misc. symbols as soon as possible, so we can use them
5006 // if we need them.
5007 Solaris::misc_sym_init();
5008
5009 int fd = ::open("/dev/zero", O_RDWR);
5010 if (fd < 0) {
5011 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
5012 } else {
5013 Solaris::set_dev_zero_fd(fd);
5014
5015 // Close on exec, child won't inherit.
5016 fcntl(fd, F_SETFD, FD_CLOEXEC);
5017 }
5018
5019 clock_tics_per_sec = CLK_TCK;
5020
5021 // check if dladdr1() exists; dladdr1 can provide more information than
5022 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
5023 // and is available on linker patches for 5.7 and 5.8.
5024 // libdl.so must have been loaded, this call is just an entry lookup
5025 void * hdl = dlopen("libdl.so", RTLD_NOW);
5026 if (hdl)
5027 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
5028
5029 // (Solaris only) this switches to calls that actually do locking.
5030 ThreadCritical::initialize();
5031
5032 main_thread = thr_self();
5033
5034 // Constant minimum stack size allowed. It must be at least
5035 // the minimum of what the OS supports (thr_min_stack()), and
5036 // enough to allow the thread to get to user bytecode execution.
5037 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
5038 // If the pagesize of the VM is greater than 8K determine the appropriate
5039 // number of initial guard pages. The user can change this with the
5040 // command line arguments, if needed.
5041 if (vm_page_size() > 8*K) {
5042 StackYellowPages = 1;
5043 StackRedPages = 1;
5044 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
5045 }
5046 }
5047
5048 // To install functions for atexit system call
5049 extern "C" {
5050 static void perfMemory_exit_helper() {
5051 perfMemory_exit();
5052 }
5053 }
5054
5055 // this is called _after_ the global arguments have been parsed
5056 jint os::init_2(void) {
5057 // try to enable extended file IO ASAP, see 6431278
5058 os::Solaris::try_enable_extended_io();
5059
5060 // Allocate a single page and mark it as readable for safepoint polling. Also
5061 // use this first mmap call to check support for MAP_ALIGN.
5062 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
5063 page_size,
5064 MAP_PRIVATE | MAP_ALIGN,
5065 PROT_READ);
5066 if (polling_page == NULL) {
5067 has_map_align = false;
5068 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
5069 PROT_READ);
5070 }
5071
5072 os::set_polling_page(polling_page);
5073
5074 #ifndef PRODUCT
5075 if( Verbose && PrintMiscellaneous )
5076 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
5077 #endif
5078
5079 if (!UseMembar) {
5080 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
5081 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
5082 os::set_memory_serialize_page( mem_serialize_page );
5083
5084 #ifndef PRODUCT
5085 if(Verbose && PrintMiscellaneous)
5086 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
5087 #endif
5088 }
5089
5090 os::large_page_init();
5091
5092 // Check minimum allowable stack size for thread creation and to initialize
5093 // the java system classes, including StackOverflowError - depends on page
5094 // size. Add a page for compiler2 recursion in main thread.
5095 // Add in 2*BytesPerWord times page size to account for VM stack during
5096 // class initialization depending on 32 or 64 bit VM.
5097 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
5098 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
5099 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
5100
5101 size_t threadStackSizeInBytes = ThreadStackSize * K;
5102 if (threadStackSizeInBytes != 0 &&
5103 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
5104 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
5105 os::Solaris::min_stack_allowed/K);
5106 return JNI_ERR;
5107 }
5108
5109 // For 64kbps there will be a 64kb page size, which makes
5110 // the usable default stack size quite a bit less. Increase the
5111 // stack for 64kb (or any > than 8kb) pages, this increases
5112 // virtual memory fragmentation (since we're not creating the
5113 // stack on a power of 2 boundary. The real fix for this
5114 // should be to fix the guard page mechanism.
5115
5116 if (vm_page_size() > 8*K) {
5117 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
5118 ? threadStackSizeInBytes +
5119 ((StackYellowPages + StackRedPages) * vm_page_size())
5120 : 0;
5121 ThreadStackSize = threadStackSizeInBytes/K;
5122 }
5123
5124 // Make the stack size a multiple of the page size so that
5125 // the yellow/red zones can be guarded.
5126 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
5127 vm_page_size()));
5128
5129 Solaris::libthread_init();
5130
5131 if (UseNUMA) {
5132 if (!Solaris::liblgrp_init()) {
5133 UseNUMA = false;
5134 } else {
5135 size_t lgrp_limit = os::numa_get_groups_num();
5136 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
5137 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
5138 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal);
5139 if (lgrp_num < 2) {
5140 // There's only one locality group, disable NUMA.
5141 UseNUMA = false;
5142 }
5143 }
5144 // ISM is not compatible with the NUMA allocator - it always allocates
5145 // pages round-robin across the lgroups.
5146 if (UseNUMA && UseLargePages && UseISM) {
5147 if (!FLAG_IS_DEFAULT(UseNUMA)) {
5148 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) {
5149 UseLargePages = false;
5150 } else {
5151 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator");
5152 UseNUMA = false;
5153 }
5154 } else {
5155 UseNUMA = false;
5156 }
5157 }
5158 if (!UseNUMA && ForceNUMA) {
5159 UseNUMA = true;
5160 }
5161 }
5162
5163 Solaris::signal_sets_init();
5164 Solaris::init_signal_mem();
5165 Solaris::install_signal_handlers();
5166
5167 if (libjsigversion < JSIG_VERSION_1_4_1) {
5168 Maxlibjsigsigs = OLDMAXSIGNUM;
5169 }
5170
5171 // initialize synchronization primitives to use either thread or
5172 // lwp synchronization (controlled by UseLWPSynchronization)
5173 Solaris::synchronization_init();
5174
5175 if (MaxFDLimit) {
5176 // set the number of file descriptors to max. print out error
5177 // if getrlimit/setrlimit fails but continue regardless.
5178 struct rlimit nbr_files;
5179 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
5180 if (status != 0) {
5181 if (PrintMiscellaneous && (Verbose || WizardMode))
5182 perror("os::init_2 getrlimit failed");
5183 } else {
5184 nbr_files.rlim_cur = nbr_files.rlim_max;
5185 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
5186 if (status != 0) {
5187 if (PrintMiscellaneous && (Verbose || WizardMode))
5188 perror("os::init_2 setrlimit failed");
5189 }
5190 }
5191 }
5192
5193 // Calculate theoretical max. size of Threads to guard gainst
5194 // artifical out-of-memory situations, where all available address-
5195 // space has been reserved by thread stacks. Default stack size is 1Mb.
5196 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
5197 JavaThread::stack_size_at_create() : (1*K*K);
5198 assert(pre_thread_stack_size != 0, "Must have a stack");
5199 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
5200 // we should start doing Virtual Memory banging. Currently when the threads will
5201 // have used all but 200Mb of space.
5202 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
5203 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
5204
5205 // at-exit methods are called in the reverse order of their registration.
5206 // In Solaris 7 and earlier, atexit functions are called on return from
5207 // main or as a result of a call to exit(3C). There can be only 32 of
5208 // these functions registered and atexit() does not set errno. In Solaris
5209 // 8 and later, there is no limit to the number of functions registered
5210 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
5211 // functions are called upon dlclose(3DL) in addition to return from main
5212 // and exit(3C).
5213
5214 if (PerfAllowAtExitRegistration) {
5215 // only register atexit functions if PerfAllowAtExitRegistration is set.
5216 // atexit functions can be delayed until process exit time, which
5217 // can be problematic for embedded VM situations. Embedded VMs should
5218 // call DestroyJavaVM() to assure that VM resources are released.
5219
5220 // note: perfMemory_exit_helper atexit function may be removed in
5221 // the future if the appropriate cleanup code can be added to the
5222 // VM_Exit VMOperation's doit method.
5223 if (atexit(perfMemory_exit_helper) != 0) {
5224 warning("os::init2 atexit(perfMemory_exit_helper) failed");
5225 }
5226 }
5227
5228 // Init pset_loadavg function pointer
5229 init_pset_getloadavg_ptr();
5230
5231 return JNI_OK;
5232 }
5233
5234 void os::init_3(void) {
5235 return;
5236 }
5237
5238 // Mark the polling page as unreadable
5239 void os::make_polling_page_unreadable(void) {
5240 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
5241 fatal("Could not disable polling page");
5242 };
5243
5244 // Mark the polling page as readable
5245 void os::make_polling_page_readable(void) {
5246 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
5247 fatal("Could not enable polling page");
5248 };
5249
5250 // OS interface.
5251
5252 bool os::check_heap(bool force) { return true; }
5253
5254 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
5255 static vsnprintf_t sol_vsnprintf = NULL;
5256
5257 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
5258 if (!sol_vsnprintf) {
5259 //search for the named symbol in the objects that were loaded after libjvm
5260 void* where = RTLD_NEXT;
5261 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5262 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5263 if (!sol_vsnprintf){
5264 //search for the named symbol in the objects that were loaded before libjvm
5265 where = RTLD_DEFAULT;
5266 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5267 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5268 assert(sol_vsnprintf != NULL, "vsnprintf not found");
5269 }
5270 }
5271 return (*sol_vsnprintf)(buf, count, fmt, argptr);
5272 }
5273
5274
5275 // Is a (classpath) directory empty?
5276 bool os::dir_is_empty(const char* path) {
5277 DIR *dir = NULL;
5278 struct dirent *ptr;
5279
5280 dir = opendir(path);
5281 if (dir == NULL) return true;
5282
5283 /* Scan the directory */
5284 bool result = true;
5285 char buf[sizeof(struct dirent) + MAX_PATH];
5286 struct dirent *dbuf = (struct dirent *) buf;
5287 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
5288 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
5289 result = false;
5290 }
5291 }
5292 closedir(dir);
5293 return result;
5294 }
5295
5296 // This code originates from JDK's sysOpen and open64_w
5297 // from src/solaris/hpi/src/system_md.c
5298
5299 #ifndef O_DELETE
5300 #define O_DELETE 0x10000
5301 #endif
5302
5303 // Open a file. Unlink the file immediately after open returns
5304 // if the specified oflag has the O_DELETE flag set.
5305 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
5306
5307 int os::open(const char *path, int oflag, int mode) {
5308 if (strlen(path) > MAX_PATH - 1) {
5309 errno = ENAMETOOLONG;
5310 return -1;
5311 }
5312 int fd;
5313 int o_delete = (oflag & O_DELETE);
5314 oflag = oflag & ~O_DELETE;
5315
5316 fd = ::open64(path, oflag, mode);
5317 if (fd == -1) return -1;
5318
5319 //If the open succeeded, the file might still be a directory
5320 {
5321 struct stat64 buf64;
5322 int ret = ::fstat64(fd, &buf64);
5323 int st_mode = buf64.st_mode;
5324
5325 if (ret != -1) {
5326 if ((st_mode & S_IFMT) == S_IFDIR) {
5327 errno = EISDIR;
5328 ::close(fd);
5329 return -1;
5330 }
5331 } else {
5332 ::close(fd);
5333 return -1;
5334 }
5335 }
5336 /*
5337 * 32-bit Solaris systems suffer from:
5338 *
5339 * - an historical default soft limit of 256 per-process file
5340 * descriptors that is too low for many Java programs.
5341 *
5342 * - a design flaw where file descriptors created using stdio
5343 * fopen must be less than 256, _even_ when the first limit above
5344 * has been raised. This can cause calls to fopen (but not calls to
5345 * open, for example) to fail mysteriously, perhaps in 3rd party
5346 * native code (although the JDK itself uses fopen). One can hardly
5347 * criticize them for using this most standard of all functions.
5348 *
5349 * We attempt to make everything work anyways by:
5350 *
5351 * - raising the soft limit on per-process file descriptors beyond
5352 * 256
5353 *
5354 * - As of Solaris 10u4, we can request that Solaris raise the 256
5355 * stdio fopen limit by calling function enable_extended_FILE_stdio.
5356 * This is done in init_2 and recorded in enabled_extended_FILE_stdio
5357 *
5358 * - If we are stuck on an old (pre 10u4) Solaris system, we can
5359 * workaround the bug by remapping non-stdio file descriptors below
5360 * 256 to ones beyond 256, which is done below.
5361 *
5362 * See:
5363 * 1085341: 32-bit stdio routines should support file descriptors >255
5364 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files
5365 * 6431278: Netbeans crash on 32 bit Solaris: need to call
5366 * enable_extended_FILE_stdio() in VM initialisation
5367 * Giri Mandalika's blog
5368 * http://technopark02.blogspot.com/2005_05_01_archive.html
5369 */
5370 #ifndef _LP64
5371 if ((!enabled_extended_FILE_stdio) && fd < 256) {
5372 int newfd = ::fcntl(fd, F_DUPFD, 256);
5373 if (newfd != -1) {
5374 ::close(fd);
5375 fd = newfd;
5376 }
5377 }
5378 #endif // 32-bit Solaris
5379 /*
5380 * All file descriptors that are opened in the JVM and not
5381 * specifically destined for a subprocess should have the
5382 * close-on-exec flag set. If we don't set it, then careless 3rd
5383 * party native code might fork and exec without closing all
5384 * appropriate file descriptors (e.g. as we do in closeDescriptors in
5385 * UNIXProcess.c), and this in turn might:
5386 *
5387 * - cause end-of-file to fail to be detected on some file
5388 * descriptors, resulting in mysterious hangs, or
5389 *
5390 * - might cause an fopen in the subprocess to fail on a system
5391 * suffering from bug 1085341.
5392 *
5393 * (Yes, the default setting of the close-on-exec flag is a Unix
5394 * design flaw)
5395 *
5396 * See:
5397 * 1085341: 32-bit stdio routines should support file descriptors >255
5398 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
5399 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
5400 */
5401 #ifdef FD_CLOEXEC
5402 {
5403 int flags = ::fcntl(fd, F_GETFD);
5404 if (flags != -1)
5405 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
5406 }
5407 #endif
5408
5409 if (o_delete != 0) {
5410 ::unlink(path);
5411 }
5412 return fd;
5413 }
5414
5415 // create binary file, rewriting existing file if required
5416 int os::create_binary_file(const char* path, bool rewrite_existing) {
5417 int oflags = O_WRONLY | O_CREAT;
5418 if (!rewrite_existing) {
5419 oflags |= O_EXCL;
5420 }
5421 return ::open64(path, oflags, S_IREAD | S_IWRITE);
5422 }
5423
5424 // return current position of file pointer
5425 jlong os::current_file_offset(int fd) {
5426 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
5427 }
5428
5429 // move file pointer to the specified offset
5430 jlong os::seek_to_file_offset(int fd, jlong offset) {
5431 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
5432 }
5433
5434 jlong os::lseek(int fd, jlong offset, int whence) {
5435 return (jlong) ::lseek64(fd, offset, whence);
5436 }
5437
5438 char * os::native_path(char *path) {
5439 return path;
5440 }
5441
5442 int os::ftruncate(int fd, jlong length) {
5443 return ::ftruncate64(fd, length);
5444 }
5445
5446 int os::fsync(int fd) {
5447 RESTARTABLE_RETURN_INT(::fsync(fd));
5448 }
5449
5450 int os::available(int fd, jlong *bytes) {
5451 jlong cur, end;
5452 int mode;
5453 struct stat64 buf64;
5454
5455 if (::fstat64(fd, &buf64) >= 0) {
5456 mode = buf64.st_mode;
5457 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
5458 /*
5459 * XXX: is the following call interruptible? If so, this might
5460 * need to go through the INTERRUPT_IO() wrapper as for other
5461 * blocking, interruptible calls in this file.
5462 */
5463 int n,ioctl_return;
5464
5465 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted);
5466 if (ioctl_return>= 0) {
5467 *bytes = n;
5468 return 1;
5469 }
5470 }
5471 }
5472 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
5473 return 0;
5474 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
5475 return 0;
5476 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
5477 return 0;
5478 }
5479 *bytes = end - cur;
5480 return 1;
5481 }
5482
5483 // Map a block of memory.
5484 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
5485 char *addr, size_t bytes, bool read_only,
5486 bool allow_exec) {
5487 int prot;
5488 int flags;
5489
5490 if (read_only) {
5491 prot = PROT_READ;
5492 flags = MAP_SHARED;
5493 } else {
5494 prot = PROT_READ | PROT_WRITE;
5495 flags = MAP_PRIVATE;
5496 }
5497
5498 if (allow_exec) {
5499 prot |= PROT_EXEC;
5500 }
5501
5502 if (addr != NULL) {
5503 flags |= MAP_FIXED;
5504 }
5505
5506 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5507 fd, file_offset);
5508 if (mapped_address == MAP_FAILED) {
5509 return NULL;
5510 }
5511 return mapped_address;
5512 }
5513
5514
5515 // Remap a block of memory.
5516 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5517 char *addr, size_t bytes, bool read_only,
5518 bool allow_exec) {
5519 // same as map_memory() on this OS
5520 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5521 allow_exec);
5522 }
5523
5524
5525 // Unmap a block of memory.
5526 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5527 return munmap(addr, bytes) == 0;
5528 }
5529
5530 void os::pause() {
5531 char filename[MAX_PATH];
5532 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5533 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5534 } else {
5535 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5536 }
5537
5538 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5539 if (fd != -1) {
5540 struct stat buf;
5541 ::close(fd);
5542 while (::stat(filename, &buf) == 0) {
5543 (void)::poll(NULL, 0, 100);
5544 }
5545 } else {
5546 jio_fprintf(stderr,
5547 "Could not open pause file '%s', continuing immediately.\n", filename);
5548 }
5549 }
5550
5551 #ifndef PRODUCT
5552 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5553 // Turn this on if you need to trace synch operations.
5554 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5555 // and call record_synch_enable and record_synch_disable
5556 // around the computation of interest.
5557
5558 void record_synch(char* name, bool returning); // defined below
5559
5560 class RecordSynch {
5561 char* _name;
5562 public:
5563 RecordSynch(char* name) :_name(name)
5564 { record_synch(_name, false); }
5565 ~RecordSynch() { record_synch(_name, true); }
5566 };
5567
5568 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5569 extern "C" ret name params { \
5570 typedef ret name##_t params; \
5571 static name##_t* implem = NULL; \
5572 static int callcount = 0; \
5573 if (implem == NULL) { \
5574 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5575 if (implem == NULL) fatal(dlerror()); \
5576 } \
5577 ++callcount; \
5578 RecordSynch _rs(#name); \
5579 inner; \
5580 return implem args; \
5581 }
5582 // in dbx, examine callcounts this way:
5583 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5584
5585 #define CHECK_POINTER_OK(p) \
5586 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5587 #define CHECK_MU \
5588 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5589 #define CHECK_CV \
5590 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5591 #define CHECK_P(p) \
5592 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5593
5594 #define CHECK_MUTEX(mutex_op) \
5595 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5596
5597 CHECK_MUTEX( mutex_lock)
5598 CHECK_MUTEX( _mutex_lock)
5599 CHECK_MUTEX( mutex_unlock)
5600 CHECK_MUTEX(_mutex_unlock)
5601 CHECK_MUTEX( mutex_trylock)
5602 CHECK_MUTEX(_mutex_trylock)
5603
5604 #define CHECK_COND(cond_op) \
5605 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
5606
5607 CHECK_COND( cond_wait);
5608 CHECK_COND(_cond_wait);
5609 CHECK_COND(_cond_wait_cancel);
5610
5611 #define CHECK_COND2(cond_op) \
5612 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
5613
5614 CHECK_COND2( cond_timedwait);
5615 CHECK_COND2(_cond_timedwait);
5616 CHECK_COND2(_cond_timedwait_cancel);
5617
5618 // do the _lwp_* versions too
5619 #define mutex_t lwp_mutex_t
5620 #define cond_t lwp_cond_t
5621 CHECK_MUTEX( _lwp_mutex_lock)
5622 CHECK_MUTEX( _lwp_mutex_unlock)
5623 CHECK_MUTEX( _lwp_mutex_trylock)
5624 CHECK_MUTEX( __lwp_mutex_lock)
5625 CHECK_MUTEX( __lwp_mutex_unlock)
5626 CHECK_MUTEX( __lwp_mutex_trylock)
5627 CHECK_MUTEX(___lwp_mutex_lock)
5628 CHECK_MUTEX(___lwp_mutex_unlock)
5629
5630 CHECK_COND( _lwp_cond_wait);
5631 CHECK_COND( __lwp_cond_wait);
5632 CHECK_COND(___lwp_cond_wait);
5633
5634 CHECK_COND2( _lwp_cond_timedwait);
5635 CHECK_COND2( __lwp_cond_timedwait);
5636 #undef mutex_t
5637 #undef cond_t
5638
5639 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5640 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5641 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5642 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5643 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5644 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5645 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5646 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5647
5648
5649 // recording machinery:
5650
5651 enum { RECORD_SYNCH_LIMIT = 200 };
5652 char* record_synch_name[RECORD_SYNCH_LIMIT];
5653 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5654 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5655 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5656 int record_synch_count = 0;
5657 bool record_synch_enabled = false;
5658
5659 // in dbx, examine recorded data this way:
5660 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5661
5662 void record_synch(char* name, bool returning) {
5663 if (record_synch_enabled) {
5664 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5665 record_synch_name[record_synch_count] = name;
5666 record_synch_returning[record_synch_count] = returning;
5667 record_synch_thread[record_synch_count] = thr_self();
5668 record_synch_arg0ptr[record_synch_count] = &name;
5669 record_synch_count++;
5670 }
5671 // put more checking code here:
5672 // ...
5673 }
5674 }
5675
5676 void record_synch_enable() {
5677 // start collecting trace data, if not already doing so
5678 if (!record_synch_enabled) record_synch_count = 0;
5679 record_synch_enabled = true;
5680 }
5681
5682 void record_synch_disable() {
5683 // stop collecting trace data
5684 record_synch_enabled = false;
5685 }
5686
5687 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5688 #endif // PRODUCT
5689
5690 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5691 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5692 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5693
5694
5695 // JVMTI & JVM monitoring and management support
5696 // The thread_cpu_time() and current_thread_cpu_time() are only
5697 // supported if is_thread_cpu_time_supported() returns true.
5698 // They are not supported on Solaris T1.
5699
5700 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5701 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5702 // of a thread.
5703 //
5704 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5705 // returns the fast estimate available on the platform.
5706
5707 // hrtime_t gethrvtime() return value includes
5708 // user time but does not include system time
5709 jlong os::current_thread_cpu_time() {
5710 return (jlong) gethrvtime();
5711 }
5712
5713 jlong os::thread_cpu_time(Thread *thread) {
5714 // return user level CPU time only to be consistent with
5715 // what current_thread_cpu_time returns.
5716 // thread_cpu_time_info() must be changed if this changes
5717 return os::thread_cpu_time(thread, false /* user time only */);
5718 }
5719
5720 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5721 if (user_sys_cpu_time) {
5722 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5723 } else {
5724 return os::current_thread_cpu_time();
5725 }
5726 }
5727
5728 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5729 char proc_name[64];
5730 int count;
5731 prusage_t prusage;
5732 jlong lwp_time;
5733 int fd;
5734
5735 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5736 getpid(),
5737 thread->osthread()->lwp_id());
5738 fd = ::open(proc_name, O_RDONLY);
5739 if ( fd == -1 ) return -1;
5740
5741 do {
5742 count = ::pread(fd,
5743 (void *)&prusage.pr_utime,
5744 thr_time_size,
5745 thr_time_off);
5746 } while (count < 0 && errno == EINTR);
5747 ::close(fd);
5748 if ( count < 0 ) return -1;
5749
5750 if (user_sys_cpu_time) {
5751 // user + system CPU time
5752 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5753 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5754 (jlong)prusage.pr_stime.tv_nsec +
5755 (jlong)prusage.pr_utime.tv_nsec;
5756 } else {
5757 // user level CPU time only
5758 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5759 (jlong)prusage.pr_utime.tv_nsec;
5760 }
5761
5762 return(lwp_time);
5763 }
5764
5765 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5766 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5767 info_ptr->may_skip_backward = false; // elapsed time not wall time
5768 info_ptr->may_skip_forward = false; // elapsed time not wall time
5769 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5770 }
5771
5772 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5773 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5774 info_ptr->may_skip_backward = false; // elapsed time not wall time
5775 info_ptr->may_skip_forward = false; // elapsed time not wall time
5776 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5777 }
5778
5779 bool os::is_thread_cpu_time_supported() {
5780 if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
5781 return true;
5782 } else {
5783 return false;
5784 }
5785 }
5786
5787 // System loadavg support. Returns -1 if load average cannot be obtained.
5788 // Return the load average for our processor set if the primitive exists
5789 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5790 int os::loadavg(double loadavg[], int nelem) {
5791 if (pset_getloadavg_ptr != NULL) {
5792 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5793 } else {
5794 return ::getloadavg(loadavg, nelem);
5795 }
5796 }
5797
5798 //---------------------------------------------------------------------------------
5799
5800 static address same_page(address x, address y) {
5801 intptr_t page_bits = -os::vm_page_size();
5802 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
5803 return x;
5804 else if (x > y)
5805 return (address)(intptr_t(y) | ~page_bits) + 1;
5806 else
5807 return (address)(intptr_t(y) & page_bits);
5808 }
5809
5810 bool os::find(address addr, outputStream* st) {
5811 Dl_info dlinfo;
5812 memset(&dlinfo, 0, sizeof(dlinfo));
5813 if (dladdr(addr, &dlinfo)) {
5814 #ifdef _LP64
5815 st->print("0x%016lx: ", addr);
5816 #else
5817 st->print("0x%08x: ", addr);
5818 #endif
5819 if (dlinfo.dli_sname != NULL)
5820 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5821 else if (dlinfo.dli_fname)
5822 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5823 else
5824 st->print("<absolute address>");
5825 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname);
5826 #ifdef _LP64
5827 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase);
5828 #else
5829 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase);
5830 #endif
5831 st->cr();
5832
5833 if (Verbose) {
5834 // decode some bytes around the PC
5835 address begin = same_page(addr-40, addr);
5836 address end = same_page(addr+40, addr);
5837 address lowest = (address) dlinfo.dli_sname;
5838 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5839 if (begin < lowest) begin = lowest;
5840 Dl_info dlinfo2;
5841 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
5842 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
5843 end = (address) dlinfo2.dli_saddr;
5844 Disassembler::decode(begin, end, st);
5845 }
5846 return true;
5847 }
5848 return false;
5849 }
5850
5851 // Following function has been added to support HotSparc's libjvm.so running
5852 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5853 // src/solaris/hpi/native_threads in the EVM codebase.
5854 //
5855 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5856 // libraries and should thus be removed. We will leave it behind for a while
5857 // until we no longer want to able to run on top of 1.3.0 Solaris production
5858 // JDK. See 4341971.
5859
5860 #define STACK_SLACK 0x800
5861
5862 extern "C" {
5863 intptr_t sysThreadAvailableStackWithSlack() {
5864 stack_t st;
5865 intptr_t retval, stack_top;
5866 retval = thr_stksegment(&st);
5867 assert(retval == 0, "incorrect return value from thr_stksegment");
5868 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5869 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5870 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5871 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5872 }
5873 }
5874
5875 // ObjectMonitor park-unpark infrastructure ...
5876 //
5877 // We implement Solaris and Linux PlatformEvents with the
5878 // obvious condvar-mutex-flag triple.
5879 // Another alternative that works quite well is pipes:
5880 // Each PlatformEvent consists of a pipe-pair.
5881 // The thread associated with the PlatformEvent
5882 // calls park(), which reads from the input end of the pipe.
5883 // Unpark() writes into the other end of the pipe.
5884 // The write-side of the pipe must be set NDELAY.
5885 // Unfortunately pipes consume a large # of handles.
5886 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5887 // Using pipes for the 1st few threads might be workable, however.
5888 //
5889 // park() is permitted to return spuriously.
5890 // Callers of park() should wrap the call to park() in
5891 // an appropriate loop. A litmus test for the correct
5892 // usage of park is the following: if park() were modified
5893 // to immediately return 0 your code should still work,
5894 // albeit degenerating to a spin loop.
5895 //
5896 // An interesting optimization for park() is to use a trylock()
5897 // to attempt to acquire the mutex. If the trylock() fails
5898 // then we know that a concurrent unpark() operation is in-progress.
5899 // in that case the park() code could simply set _count to 0
5900 // and return immediately. The subsequent park() operation *might*
5901 // return immediately. That's harmless as the caller of park() is
5902 // expected to loop. By using trylock() we will have avoided a
5903 // avoided a context switch caused by contention on the per-thread mutex.
5904 //
5905 // TODO-FIXME:
5906 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5907 // objectmonitor implementation.
5908 // 2. Collapse the JSR166 parker event, and the
5909 // objectmonitor ParkEvent into a single "Event" construct.
5910 // 3. In park() and unpark() add:
5911 // assert (Thread::current() == AssociatedWith).
5912 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5913 // 1-out-of-N park() operations will return immediately.
5914 //
5915 // _Event transitions in park()
5916 // -1 => -1 : illegal
5917 // 1 => 0 : pass - return immediately
5918 // 0 => -1 : block
5919 //
5920 // _Event serves as a restricted-range semaphore.
5921 //
5922 // Another possible encoding of _Event would be with
5923 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5924 //
5925 // TODO-FIXME: add DTRACE probes for:
5926 // 1. Tx parks
5927 // 2. Ty unparks Tx
5928 // 3. Tx resumes from park
5929
5930
5931 // value determined through experimentation
5932 #define ROUNDINGFIX 11
5933
5934 // utility to compute the abstime argument to timedwait.
5935 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5936
5937 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5938 // millis is the relative timeout time
5939 // abstime will be the absolute timeout time
5940 if (millis < 0) millis = 0;
5941 struct timeval now;
5942 int status = gettimeofday(&now, NULL);
5943 assert(status == 0, "gettimeofday");
5944 jlong seconds = millis / 1000;
5945 jlong max_wait_period;
5946
5947 if (UseLWPSynchronization) {
5948 // forward port of fix for 4275818 (not sleeping long enough)
5949 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5950 // _lwp_cond_timedwait() used a round_down algorithm rather
5951 // than a round_up. For millis less than our roundfactor
5952 // it rounded down to 0 which doesn't meet the spec.
5953 // For millis > roundfactor we may return a bit sooner, but
5954 // since we can not accurately identify the patch level and
5955 // this has already been fixed in Solaris 9 and 8 we will
5956 // leave it alone rather than always rounding down.
5957
5958 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5959 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5960 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5961 max_wait_period = 21000000;
5962 } else {
5963 max_wait_period = 50000000;
5964 }
5965 millis %= 1000;
5966 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5967 seconds = max_wait_period;
5968 }
5969 abstime->tv_sec = now.tv_sec + seconds;
5970 long usec = now.tv_usec + millis * 1000;
5971 if (usec >= 1000000) {
5972 abstime->tv_sec += 1;
5973 usec -= 1000000;
5974 }
5975 abstime->tv_nsec = usec * 1000;
5976 return abstime;
5977 }
5978
5979 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
5980 // Conceptually TryPark() should be equivalent to park(0).
5981
5982 int os::PlatformEvent::TryPark() {
5983 for (;;) {
5984 const int v = _Event ;
5985 guarantee ((v == 0) || (v == 1), "invariant") ;
5986 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
5987 }
5988 }
5989
5990 void os::PlatformEvent::park() { // AKA: down()
5991 // Invariant: Only the thread associated with the Event/PlatformEvent
5992 // may call park().
5993 int v ;
5994 for (;;) {
5995 v = _Event ;
5996 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5997 }
5998 guarantee (v >= 0, "invariant") ;
5999 if (v == 0) {
6000 // Do this the hard way by blocking ...
6001 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6002 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6003 // Only for SPARC >= V8PlusA
6004 #if defined(__sparc) && defined(COMPILER2)
6005 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6006 #endif
6007 int status = os::Solaris::mutex_lock(_mutex);
6008 assert_status(status == 0, status, "mutex_lock");
6009 guarantee (_nParked == 0, "invariant") ;
6010 ++ _nParked ;
6011 while (_Event < 0) {
6012 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
6013 // Treat this the same as if the wait was interrupted
6014 // With usr/lib/lwp going to kernel, always handle ETIME
6015 status = os::Solaris::cond_wait(_cond, _mutex);
6016 if (status == ETIME) status = EINTR ;
6017 assert_status(status == 0 || status == EINTR, status, "cond_wait");
6018 }
6019 -- _nParked ;
6020 _Event = 0 ;
6021 status = os::Solaris::mutex_unlock(_mutex);
6022 assert_status(status == 0, status, "mutex_unlock");
6023 }
6024 }
6025
6026 int os::PlatformEvent::park(jlong millis) {
6027 guarantee (_nParked == 0, "invariant") ;
6028 int v ;
6029 for (;;) {
6030 v = _Event ;
6031 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
6032 }
6033 guarantee (v >= 0, "invariant") ;
6034 if (v != 0) return OS_OK ;
6035
6036 int ret = OS_TIMEOUT;
6037 timestruc_t abst;
6038 compute_abstime (&abst, millis);
6039
6040 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6041 // For Solaris SPARC set fprs.FEF=0 prior to parking.
6042 // Only for SPARC >= V8PlusA
6043 #if defined(__sparc) && defined(COMPILER2)
6044 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6045 #endif
6046 int status = os::Solaris::mutex_lock(_mutex);
6047 assert_status(status == 0, status, "mutex_lock");
6048 guarantee (_nParked == 0, "invariant") ;
6049 ++ _nParked ;
6050 while (_Event < 0) {
6051 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
6052 assert_status(status == 0 || status == EINTR ||
6053 status == ETIME || status == ETIMEDOUT,
6054 status, "cond_timedwait");
6055 if (!FilterSpuriousWakeups) break ; // previous semantics
6056 if (status == ETIME || status == ETIMEDOUT) break ;
6057 // We consume and ignore EINTR and spurious wakeups.
6058 }
6059 -- _nParked ;
6060 if (_Event >= 0) ret = OS_OK ;
6061 _Event = 0 ;
6062 status = os::Solaris::mutex_unlock(_mutex);
6063 assert_status(status == 0, status, "mutex_unlock");
6064 return ret;
6065 }
6066
6067 void os::PlatformEvent::unpark() {
6068 int v, AnyWaiters;
6069
6070 // Increment _Event.
6071 // Another acceptable implementation would be to simply swap 1
6072 // into _Event:
6073 // if (Swap (&_Event, 1) < 0) {
6074 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ;
6075 // if (AnyWaiters) cond_signal (_cond) ;
6076 // }
6077
6078 for (;;) {
6079 v = _Event ;
6080 if (v > 0) {
6081 // The LD of _Event could have reordered or be satisfied
6082 // by a read-aside from this processor's write buffer.
6083 // To avoid problems execute a barrier and then
6084 // ratify the value. A degenerate CAS() would also work.
6085 // Viz., CAS (v+0, &_Event, v) == v).
6086 OrderAccess::fence() ;
6087 if (_Event == v) return ;
6088 continue ;
6089 }
6090 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
6091 }
6092
6093 // If the thread associated with the event was parked, wake it.
6094 if (v < 0) {
6095 int status ;
6096 // Wait for the thread assoc with the PlatformEvent to vacate.
6097 status = os::Solaris::mutex_lock(_mutex);
6098 assert_status(status == 0, status, "mutex_lock");
6099 AnyWaiters = _nParked ;
6100 status = os::Solaris::mutex_unlock(_mutex);
6101 assert_status(status == 0, status, "mutex_unlock");
6102 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ;
6103 if (AnyWaiters != 0) {
6104 // We intentional signal *after* dropping the lock
6105 // to avoid a common class of futile wakeups.
6106 status = os::Solaris::cond_signal(_cond);
6107 assert_status(status == 0, status, "cond_signal");
6108 }
6109 }
6110 }
6111
6112 // JSR166
6113 // -------------------------------------------------------
6114
6115 /*
6116 * The solaris and linux implementations of park/unpark are fairly
6117 * conservative for now, but can be improved. They currently use a
6118 * mutex/condvar pair, plus _counter.
6119 * Park decrements _counter if > 0, else does a condvar wait. Unpark
6120 * sets count to 1 and signals condvar. Only one thread ever waits
6121 * on the condvar. Contention seen when trying to park implies that someone
6122 * is unparking you, so don't wait. And spurious returns are fine, so there
6123 * is no need to track notifications.
6124 */
6125
6126 #define MAX_SECS 100000000
6127 /*
6128 * This code is common to linux and solaris and will be moved to a
6129 * common place in dolphin.
6130 *
6131 * The passed in time value is either a relative time in nanoseconds
6132 * or an absolute time in milliseconds. Either way it has to be unpacked
6133 * into suitable seconds and nanoseconds components and stored in the
6134 * given timespec structure.
6135 * Given time is a 64-bit value and the time_t used in the timespec is only
6136 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
6137 * overflow if times way in the future are given. Further on Solaris versions
6138 * prior to 10 there is a restriction (see cond_timedwait) that the specified
6139 * number of seconds, in abstime, is less than current_time + 100,000,000.
6140 * As it will be 28 years before "now + 100000000" will overflow we can
6141 * ignore overflow and just impose a hard-limit on seconds using the value
6142 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
6143 * years from "now".
6144 */
6145 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
6146 assert (time > 0, "convertTime");
6147
6148 struct timeval now;
6149 int status = gettimeofday(&now, NULL);
6150 assert(status == 0, "gettimeofday");
6151
6152 time_t max_secs = now.tv_sec + MAX_SECS;
6153
6154 if (isAbsolute) {
6155 jlong secs = time / 1000;
6156 if (secs > max_secs) {
6157 absTime->tv_sec = max_secs;
6158 }
6159 else {
6160 absTime->tv_sec = secs;
6161 }
6162 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
6163 }
6164 else {
6165 jlong secs = time / NANOSECS_PER_SEC;
6166 if (secs >= MAX_SECS) {
6167 absTime->tv_sec = max_secs;
6168 absTime->tv_nsec = 0;
6169 }
6170 else {
6171 absTime->tv_sec = now.tv_sec + secs;
6172 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
6173 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
6174 absTime->tv_nsec -= NANOSECS_PER_SEC;
6175 ++absTime->tv_sec; // note: this must be <= max_secs
6176 }
6177 }
6178 }
6179 assert(absTime->tv_sec >= 0, "tv_sec < 0");
6180 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
6181 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
6182 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
6183 }
6184
6185 void Parker::park(bool isAbsolute, jlong time) {
6186
6187 // Optional fast-path check:
6188 // Return immediately if a permit is available.
6189 if (_counter > 0) {
6190 _counter = 0 ;
6191 OrderAccess::fence();
6192 return ;
6193 }
6194
6195 // Optional fast-exit: Check interrupt before trying to wait
6196 Thread* thread = Thread::current();
6197 assert(thread->is_Java_thread(), "Must be JavaThread");
6198 JavaThread *jt = (JavaThread *)thread;
6199 if (Thread::is_interrupted(thread, false)) {
6200 return;
6201 }
6202
6203 // First, demultiplex/decode time arguments
6204 timespec absTime;
6205 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
6206 return;
6207 }
6208 if (time > 0) {
6209 // Warning: this code might be exposed to the old Solaris time
6210 // round-down bugs. Grep "roundingFix" for details.
6211 unpackTime(&absTime, isAbsolute, time);
6212 }
6213
6214 // Enter safepoint region
6215 // Beware of deadlocks such as 6317397.
6216 // The per-thread Parker:: _mutex is a classic leaf-lock.
6217 // In particular a thread must never block on the Threads_lock while
6218 // holding the Parker:: mutex. If safepoints are pending both the
6219 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
6220 ThreadBlockInVM tbivm(jt);
6221
6222 // Don't wait if cannot get lock since interference arises from
6223 // unblocking. Also. check interrupt before trying wait
6224 if (Thread::is_interrupted(thread, false) ||
6225 os::Solaris::mutex_trylock(_mutex) != 0) {
6226 return;
6227 }
6228
6229 int status ;
6230
6231 if (_counter > 0) { // no wait needed
6232 _counter = 0;
6233 status = os::Solaris::mutex_unlock(_mutex);
6234 assert (status == 0, "invariant") ;
6235 OrderAccess::fence();
6236 return;
6237 }
6238
6239 #ifdef ASSERT
6240 // Don't catch signals while blocked; let the running threads have the signals.
6241 // (This allows a debugger to break into the running thread.)
6242 sigset_t oldsigs;
6243 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
6244 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
6245 #endif
6246
6247 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
6248 jt->set_suspend_equivalent();
6249 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
6250
6251 // Do this the hard way by blocking ...
6252 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6253 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6254 // Only for SPARC >= V8PlusA
6255 #if defined(__sparc) && defined(COMPILER2)
6256 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6257 #endif
6258
6259 if (time == 0) {
6260 status = os::Solaris::cond_wait (_cond, _mutex) ;
6261 } else {
6262 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
6263 }
6264 // Note that an untimed cond_wait() can sometimes return ETIME on older
6265 // versions of the Solaris.
6266 assert_status(status == 0 || status == EINTR ||
6267 status == ETIME || status == ETIMEDOUT,
6268 status, "cond_timedwait");
6269
6270 #ifdef ASSERT
6271 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
6272 #endif
6273 _counter = 0 ;
6274 status = os::Solaris::mutex_unlock(_mutex);
6275 assert_status(status == 0, status, "mutex_unlock") ;
6276
6277 // If externally suspended while waiting, re-suspend
6278 if (jt->handle_special_suspend_equivalent_condition()) {
6279 jt->java_suspend_self();
6280 }
6281 OrderAccess::fence();
6282 }
6283
6284 void Parker::unpark() {
6285 int s, status ;
6286 status = os::Solaris::mutex_lock (_mutex) ;
6287 assert (status == 0, "invariant") ;
6288 s = _counter;
6289 _counter = 1;
6290 status = os::Solaris::mutex_unlock (_mutex) ;
6291 assert (status == 0, "invariant") ;
6292
6293 if (s < 1) {
6294 status = os::Solaris::cond_signal (_cond) ;
6295 assert (status == 0, "invariant") ;
6296 }
6297 }
6298
6299 extern char** environ;
6300
6301 // Run the specified command in a separate process. Return its exit value,
6302 // or -1 on failure (e.g. can't fork a new process).
6303 // Unlike system(), this function can be called from signal handler. It
6304 // doesn't block SIGINT et al.
6305 int os::fork_and_exec(char* cmd) {
6306 char * argv[4];
6307 argv[0] = (char *)"sh";
6308 argv[1] = (char *)"-c";
6309 argv[2] = cmd;
6310 argv[3] = NULL;
6311
6312 // fork is async-safe, fork1 is not so can't use in signal handler
6313 pid_t pid;
6314 Thread* t = ThreadLocalStorage::get_thread_slow();
6315 if (t != NULL && t->is_inside_signal_handler()) {
6316 pid = fork();
6317 } else {
6318 pid = fork1();
6319 }
6320
6321 if (pid < 0) {
6322 // fork failed
6323 warning("fork failed: %s", strerror(errno));
6324 return -1;
6325
6326 } else if (pid == 0) {
6327 // child process
6328
6329 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
6330 execve("/usr/bin/sh", argv, environ);
6331
6332 // execve failed
6333 _exit(-1);
6334
6335 } else {
6336 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
6337 // care about the actual exit code, for now.
6338
6339 int status;
6340
6341 // Wait for the child process to exit. This returns immediately if
6342 // the child has already exited. */
6343 while (waitpid(pid, &status, 0) < 0) {
6344 switch (errno) {
6345 case ECHILD: return 0;
6346 case EINTR: break;
6347 default: return -1;
6348 }
6349 }
6350
6351 if (WIFEXITED(status)) {
6352 // The child exited normally; get its exit code.
6353 return WEXITSTATUS(status);
6354 } else if (WIFSIGNALED(status)) {
6355 // The child exited because of a signal
6356 // The best value to return is 0x80 + signal number,
6357 // because that is what all Unix shells do, and because
6358 // it allows callers to distinguish between process exit and
6359 // process death by signal.
6360 return 0x80 + WTERMSIG(status);
6361 } else {
6362 // Unknown exit code; pass it through
6363 return status;
6364 }
6365 }
6366 }
6367
6368 // is_headless_jre()
6369 //
6370 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
6371 // in order to report if we are running in a headless jre
6372 //
6373 // Since JDK8 xawt/libmawt.so was moved into the same directory
6374 // as libawt.so, and renamed libawt_xawt.so
6375 //
6376 bool os::is_headless_jre() {
6377 struct stat statbuf;
6378 char buf[MAXPATHLEN];
6379 char libmawtpath[MAXPATHLEN];
6380 const char *xawtstr = "/xawt/libmawt.so";
6381 const char *new_xawtstr = "/libawt_xawt.so";
6382 char *p;
6383
6384 // Get path to libjvm.so
6385 os::jvm_path(buf, sizeof(buf));
6386
6387 // Get rid of libjvm.so
6388 p = strrchr(buf, '/');
6389 if (p == NULL) return false;
6390 else *p = '\0';
6391
6392 // Get rid of client or server
6393 p = strrchr(buf, '/');
6394 if (p == NULL) return false;
6395 else *p = '\0';
6396
6397 // check xawt/libmawt.so
6398 strcpy(libmawtpath, buf);
6399 strcat(libmawtpath, xawtstr);
6400 if (::stat(libmawtpath, &statbuf) == 0) return false;
6401
6402 // check libawt_xawt.so
6403 strcpy(libmawtpath, buf);
6404 strcat(libmawtpath, new_xawtstr);
6405 if (::stat(libmawtpath, &statbuf) == 0) return false;
6406
6407 return true;
6408 }
6409
6410 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
6411 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted);
6412 }
6413
6414 int os::close(int fd) {
6415 RESTARTABLE_RETURN_INT(::close(fd));
6416 }
6417
6418 int os::socket_close(int fd) {
6419 RESTARTABLE_RETURN_INT(::close(fd));
6420 }
6421
6422 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
6423 INTERRUPTIBLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6424 }
6425
6426 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
6427 INTERRUPTIBLE_RETURN_INT((int)::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6428 }
6429
6430 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
6431 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
6432 }
6433
6434 // As both poll and select can be interrupted by signals, we have to be
6435 // prepared to restart the system call after updating the timeout, unless
6436 // a poll() is done with timeout == -1, in which case we repeat with this
6437 // "wait forever" value.
6438
6439 int os::timeout(int fd, long timeout) {
6440 int res;
6441 struct timeval t;
6442 julong prevtime, newtime;
6443 static const char* aNull = 0;
6444 struct pollfd pfd;
6445 pfd.fd = fd;
6446 pfd.events = POLLIN;
6447
6448 gettimeofday(&t, &aNull);
6449 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
6450
6451 for(;;) {
6452 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted);
6453 if(res == OS_ERR && errno == EINTR) {
6454 if(timeout != -1) {
6455 gettimeofday(&t, &aNull);
6456 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000;
6457 timeout -= newtime - prevtime;
6458 if(timeout <= 0)
6459 return OS_OK;
6460 prevtime = newtime;
6461 }
6462 } else return res;
6463 }
6464 }
6465
6466 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
6467 int _result;
6468 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,\
6469 os::Solaris::clear_interrupted);
6470
6471 // Depending on when thread interruption is reset, _result could be
6472 // one of two values when errno == EINTR
6473
6474 if (((_result == OS_INTRPT) || (_result == OS_ERR))
6475 && (errno == EINTR)) {
6476 /* restarting a connect() changes its errno semantics */
6477 INTERRUPTIBLE(::connect(fd, him, len), _result,\
6478 os::Solaris::clear_interrupted);
6479 /* undo these changes */
6480 if (_result == OS_ERR) {
6481 if (errno == EALREADY) {
6482 errno = EINPROGRESS; /* fall through */
6483 } else if (errno == EISCONN) {
6484 errno = 0;
6485 return OS_OK;
6486 }
6487 }
6488 }
6489 return _result;
6490 }
6491
6492 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
6493 if (fd < 0) {
6494 return OS_ERR;
6495 }
6496 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, len),\
6497 os::Solaris::clear_interrupted);
6498 }
6499
6500 int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
6501 sockaddr* from, socklen_t* fromlen) {
6502 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen),\
6503 os::Solaris::clear_interrupted);
6504 }
6505
6506 int os::sendto(int fd, char* buf, size_t len, uint flags,
6507 struct sockaddr* to, socklen_t tolen) {
6508 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen),\
6509 os::Solaris::clear_interrupted);
6510 }
6511
6512 int os::socket_available(int fd, jint *pbytes) {
6513 if (fd < 0) {
6514 return OS_OK;
6515 }
6516 int ret;
6517 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
6518 // note: ioctl can return 0 when successful, JVM_SocketAvailable
6519 // is expected to return 0 on failure and 1 on success to the jdk.
6520 return (ret == OS_ERR) ? 0 : 1;
6521 }
6522
6523 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
6524 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\
6525 os::Solaris::clear_interrupted);
6526 }
6527
6528 // Get the default path to the core file
6529 // Returns the length of the string
6530 int os::get_core_path(char* buffer, size_t bufferSize) {
6531 const char* p = get_current_directory(buffer, bufferSize);
6532
6533 if (p == NULL) {
6534 assert(p != NULL, "failed to get current directory");
6535 return 0;
6536 }
6537
6538 return strlen(buffer);
6539 }