1 /*
2 * Copyright (c) 1997, 2011, 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/runtimeService.hpp"
59 #include "thread_solaris.inline.hpp"
60 #include "utilities/decoder.hpp"
61 #include "utilities/defaultStream.hpp"
62 #include "utilities/events.hpp"
63 #include "utilities/growableArray.hpp"
64 #include "utilities/vmError.hpp"
65 #ifdef TARGET_ARCH_x86
66 # include "assembler_x86.inline.hpp"
67 # include "nativeInst_x86.hpp"
68 #endif
69 #ifdef TARGET_ARCH_sparc
70 # include "assembler_sparc.inline.hpp"
71 # include "nativeInst_sparc.hpp"
72 #endif
73 #ifdef COMPILER1
74 #include "c1/c1_Runtime1.hpp"
75 #endif
76 #ifdef COMPILER2
77 #include "opto/runtime.hpp"
78 #endif
79
80 // put OS-includes here
81 # include <dlfcn.h>
82 # include <errno.h>
83 # include <exception>
84 # include <link.h>
85 # include <poll.h>
86 # include <pthread.h>
87 # include <pwd.h>
88 # include <schedctl.h>
89 # include <setjmp.h>
90 # include <signal.h>
91 # include <stdio.h>
92 # include <alloca.h>
93 # include <sys/filio.h>
94 # include <sys/ipc.h>
95 # include <sys/lwp.h>
96 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
97 # include <sys/mman.h>
98 # include <sys/processor.h>
99 # include <sys/procset.h>
100 # include <sys/pset.h>
101 # include <sys/resource.h>
102 # include <sys/shm.h>
103 # include <sys/socket.h>
104 # include <sys/stat.h>
105 # include <sys/systeminfo.h>
106 # include <sys/time.h>
107 # include <sys/times.h>
108 # include <sys/types.h>
109 # include <sys/wait.h>
110 # include <sys/utsname.h>
111 # include <thread.h>
112 # include <unistd.h>
113 # include <sys/priocntl.h>
114 # include <sys/rtpriocntl.h>
115 # include <sys/tspriocntl.h>
116 # include <sys/iapriocntl.h>
117 # include <sys/loadavg.h>
118 # include <string.h>
119 # include <stdio.h>
120
121 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
122 # include <sys/procfs.h> // see comment in <sys/procfs.h>
123
124 #define MAX_PATH (2 * K)
125
126 // for timer info max values which include all bits
127 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
128
129 #ifdef _GNU_SOURCE
130 // See bug #6514594
131 extern "C" int madvise(caddr_t, size_t, int);
132 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg,
133 int attr, int mask);
134 #endif //_GNU_SOURCE
135
136 /*
137 MPSS Changes Start.
138 The JVM binary needs to be built and run on pre-Solaris 9
139 systems, but the constants needed by MPSS are only in Solaris 9
140 header files. They are textually replicated here to allow
141 building on earlier systems. Once building on Solaris 8 is
142 no longer a requirement, these #defines can be replaced by ordinary
143 system .h inclusion.
144
145 In earlier versions of the JDK and Solaris, we used ISM for large pages.
146 But ISM requires shared memory to achieve this and thus has many caveats.
147 MPSS is a fully transparent and is a cleaner way to get large pages.
148 Although we still require keeping ISM for backward compatiblitiy as well as
149 giving the opportunity to use large pages on older systems it is
150 recommended that MPSS be used for Solaris 9 and above.
151
152 */
153
154 #ifndef MC_HAT_ADVISE
155
156 struct memcntl_mha {
157 uint_t mha_cmd; /* command(s) */
158 uint_t mha_flags;
159 size_t mha_pagesize;
160 };
161 #define MC_HAT_ADVISE 7 /* advise hat map size */
162 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */
163 #define MAP_ALIGN 0x200 /* addr specifies alignment */
164
165 #endif
166 // MPSS Changes End.
167
168
169 // Here are some liblgrp types from sys/lgrp_user.h to be able to
170 // compile on older systems without this header file.
171
172 #ifndef MADV_ACCESS_LWP
173 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
174 #endif
175 #ifndef MADV_ACCESS_MANY
176 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */
177 #endif
178
179 #ifndef LGRP_RSRC_CPU
180 # define LGRP_RSRC_CPU 0 /* CPU resources */
181 #endif
182 #ifndef LGRP_RSRC_MEM
183 # define LGRP_RSRC_MEM 1 /* memory resources */
184 #endif
185
186 // Some more macros from sys/mman.h that are not present in Solaris 8.
187
188 #ifndef MAX_MEMINFO_CNT
189 /*
190 * info_req request type definitions for meminfo
191 * request types starting with MEMINFO_V are used for Virtual addresses
192 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical
193 * addresses
194 */
195 # define MEMINFO_SHIFT 16
196 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT)
197 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */
198 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */
199 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */
200 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */
201 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */
202 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */
203 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */
204
205 /* maximum number of addresses meminfo() can process at a time */
206 # define MAX_MEMINFO_CNT 256
207
208 /* maximum number of request types */
209 # define MAX_MEMINFO_REQ 31
210 #endif
211
212 // see thr_setprio(3T) for the basis of these numbers
213 #define MinimumPriority 0
214 #define NormalPriority 64
215 #define MaximumPriority 127
216
217 // Values for ThreadPriorityPolicy == 1
218 int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64,
219 80, 96, 112, 124, 127 };
220
221 // System parameters used internally
222 static clock_t clock_tics_per_sec = 100;
223
224 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
225 static bool enabled_extended_FILE_stdio = false;
226
227 // For diagnostics to print a message once. see run_periodic_checks
228 static bool check_addr0_done = false;
229 static sigset_t check_signal_done;
230 static bool check_signals = true;
231
232 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
233 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
234
235 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
236
237
238 // "default" initializers for missing libc APIs
239 extern "C" {
240 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
241 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
242
243 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
244 static int lwp_cond_destroy(cond_t *cv) { return 0; }
245 }
246
247 // "default" initializers for pthread-based synchronization
248 extern "C" {
249 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
250 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
251 }
252
253 // Thread Local Storage
254 // This is common to all Solaris platforms so it is defined here,
255 // in this common file.
256 // The declarations are in the os_cpu threadLS*.hpp files.
257 //
258 // Static member initialization for TLS
259 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
260
261 #ifndef PRODUCT
262 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
263
264 int ThreadLocalStorage::_tcacheHit = 0;
265 int ThreadLocalStorage::_tcacheMiss = 0;
266
267 void ThreadLocalStorage::print_statistics() {
268 int total = _tcacheMiss+_tcacheHit;
269 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
270 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
271 }
272 #undef _PCT
273 #endif // PRODUCT
274
275 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
276 int index) {
277 Thread *thread = get_thread_slow();
278 if (thread != NULL) {
279 address sp = os::current_stack_pointer();
280 guarantee(thread->_stack_base == NULL ||
281 (sp <= thread->_stack_base &&
282 sp >= thread->_stack_base - thread->_stack_size) ||
283 is_error_reported(),
284 "sp must be inside of selected thread stack");
285
286 thread->set_self_raw_id(raw_id); // mark for quick retrieval
287 _get_thread_cache[ index ] = thread;
288 }
289 return thread;
290 }
291
292
293 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0};
294 #define NO_CACHED_THREAD ((Thread*)all_zero)
295
296 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
297
298 // Store the new value before updating the cache to prevent a race
299 // between get_thread_via_cache_slowly() and this store operation.
300 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
301
302 // Update thread cache with new thread if setting on thread create,
303 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
304 uintptr_t raw = pd_raw_thread_id();
305 int ix = pd_cache_index(raw);
306 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
307 }
308
309 void ThreadLocalStorage::pd_init() {
310 for (int i = 0; i < _pd_cache_size; i++) {
311 _get_thread_cache[i] = NO_CACHED_THREAD;
312 }
313 }
314
315 // Invalidate all the caches (happens to be the same as pd_init).
316 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
317
318 #undef NO_CACHED_THREAD
319
320 // END Thread Local Storage
321
322 static inline size_t adjust_stack_size(address base, size_t size) {
323 if ((ssize_t)size < 0) {
324 // 4759953: Compensate for ridiculous stack size.
325 size = max_intx;
326 }
327 if (size > (size_t)base) {
328 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
329 size = (size_t)base;
330 }
331 return size;
332 }
333
334 static inline stack_t get_stack_info() {
335 stack_t st;
336 int retval = thr_stksegment(&st);
337 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
338 assert(retval == 0, "incorrect return value from thr_stksegment");
339 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
340 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
341 return st;
342 }
343
344 address os::current_stack_base() {
345 int r = thr_main() ;
346 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
347 bool is_primordial_thread = r;
348
349 // Workaround 4352906, avoid calls to thr_stksegment by
350 // thr_main after the first one (it looks like we trash
351 // some data, causing the value for ss_sp to be incorrect).
352 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
353 stack_t st = get_stack_info();
354 if (is_primordial_thread) {
355 // cache initial value of stack base
356 os::Solaris::_main_stack_base = (address)st.ss_sp;
357 }
358 return (address)st.ss_sp;
359 } else {
360 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
361 return os::Solaris::_main_stack_base;
362 }
363 }
364
365 size_t os::current_stack_size() {
366 size_t size;
367
368 int r = thr_main() ;
369 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
370 if(!r) {
371 size = get_stack_info().ss_size;
372 } else {
373 struct rlimit limits;
374 getrlimit(RLIMIT_STACK, &limits);
375 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
376 }
377 // base may not be page aligned
378 address base = current_stack_base();
379 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
380 return (size_t)(base - bottom);
381 }
382
383 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
384 return localtime_r(clock, res);
385 }
386
387 // interruptible infrastructure
388
389 // setup_interruptible saves the thread state before going into an
390 // interruptible system call.
391 // The saved state is used to restore the thread to
392 // its former state whether or not an interrupt is received.
393 // Used by classloader os::read
394 // os::restartable_read calls skip this layer and stay in _thread_in_native
395
396 void os::Solaris::setup_interruptible(JavaThread* thread) {
397
398 JavaThreadState thread_state = thread->thread_state();
399
400 assert(thread_state != _thread_blocked, "Coming from the wrong thread");
401 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible");
402 OSThread* osthread = thread->osthread();
403 osthread->set_saved_interrupt_thread_state(thread_state);
404 thread->frame_anchor()->make_walkable(thread);
405 ThreadStateTransition::transition(thread, thread_state, _thread_blocked);
406 }
407
408 // Version of setup_interruptible() for threads that are already in
409 // _thread_blocked. Used by os_sleep().
410 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) {
411 thread->frame_anchor()->make_walkable(thread);
412 }
413
414 JavaThread* os::Solaris::setup_interruptible() {
415 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
416 setup_interruptible(thread);
417 return thread;
418 }
419
420 void os::Solaris::try_enable_extended_io() {
421 typedef int (*enable_extended_FILE_stdio_t)(int, int);
422
423 if (!UseExtendedFileIO) {
424 return;
425 }
426
427 enable_extended_FILE_stdio_t enabler =
428 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
429 "enable_extended_FILE_stdio");
430 if (enabler) {
431 enabler(-1, -1);
432 }
433 }
434
435
436 #ifdef ASSERT
437
438 JavaThread* os::Solaris::setup_interruptible_native() {
439 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
440 JavaThreadState thread_state = thread->thread_state();
441 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
442 return thread;
443 }
444
445 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) {
446 JavaThreadState thread_state = thread->thread_state();
447 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
448 }
449 #endif
450
451 // cleanup_interruptible reverses the effects of setup_interruptible
452 // setup_interruptible_already_blocked() does not need any cleanup.
453
454 void os::Solaris::cleanup_interruptible(JavaThread* thread) {
455 OSThread* osthread = thread->osthread();
456
457 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state());
458 }
459
460 // I/O interruption related counters called in _INTERRUPTIBLE
461
462 void os::Solaris::bump_interrupted_before_count() {
463 RuntimeService::record_interrupted_before_count();
464 }
465
466 void os::Solaris::bump_interrupted_during_count() {
467 RuntimeService::record_interrupted_during_count();
468 }
469
470 static int _processors_online = 0;
471
472 jint os::Solaris::_os_thread_limit = 0;
473 volatile jint os::Solaris::_os_thread_count = 0;
474
475 julong os::available_memory() {
476 return Solaris::available_memory();
477 }
478
479 julong os::Solaris::available_memory() {
480 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
481 }
482
483 julong os::Solaris::_physical_memory = 0;
484
485 julong os::physical_memory() {
486 return Solaris::physical_memory();
487 }
488
489 julong os::allocatable_physical_memory(julong size) {
490 #ifdef _LP64
491 return size;
492 #else
493 julong result = MIN2(size, (julong)3835*M);
494 if (!is_allocatable(result)) {
495 // Memory allocations will be aligned but the alignment
496 // is not known at this point. Alignments will
497 // be at most to LargePageSizeInBytes. Protect
498 // allocations from alignments up to illegal
499 // values. If at this point 2G is illegal.
500 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes;
501 result = MIN2(size, reasonable_size);
502 }
503 return result;
504 #endif
505 }
506
507 static hrtime_t first_hrtime = 0;
508 static const hrtime_t hrtime_hz = 1000*1000*1000;
509 const int LOCK_BUSY = 1;
510 const int LOCK_FREE = 0;
511 const int LOCK_INVALID = -1;
512 static volatile hrtime_t max_hrtime = 0;
513 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress
514
515
516 void os::Solaris::initialize_system_info() {
517 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
518 _processors_online = sysconf (_SC_NPROCESSORS_ONLN);
519 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
520 }
521
522 int os::active_processor_count() {
523 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
524 pid_t pid = getpid();
525 psetid_t pset = PS_NONE;
526 // Are we running in a processor set or is there any processor set around?
527 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
528 uint_t pset_cpus;
529 // Query the number of cpus available to us.
530 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
531 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
532 _processors_online = pset_cpus;
533 return pset_cpus;
534 }
535 }
536 // Otherwise return number of online cpus
537 return online_cpus;
538 }
539
540 static bool find_processors_in_pset(psetid_t pset,
541 processorid_t** id_array,
542 uint_t* id_length) {
543 bool result = false;
544 // Find the number of processors in the processor set.
545 if (pset_info(pset, NULL, id_length, NULL) == 0) {
546 // Make up an array to hold their ids.
547 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length);
548 // Fill in the array with their processor ids.
549 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
550 result = true;
551 }
552 }
553 return result;
554 }
555
556 // Callers of find_processors_online() must tolerate imprecise results --
557 // the system configuration can change asynchronously because of DR
558 // or explicit psradm operations.
559 //
560 // We also need to take care that the loop (below) terminates as the
561 // number of processors online can change between the _SC_NPROCESSORS_ONLN
562 // request and the loop that builds the list of processor ids. Unfortunately
563 // there's no reliable way to determine the maximum valid processor id,
564 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
565 // man pages, which claim the processor id set is "sparse, but
566 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
567 // exit the loop.
568 //
569 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
570 // not available on S8.0.
571
572 static bool find_processors_online(processorid_t** id_array,
573 uint* id_length) {
574 const processorid_t MAX_PROCESSOR_ID = 100000 ;
575 // Find the number of processors online.
576 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
577 // Make up an array to hold their ids.
578 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length);
579 // Processors need not be numbered consecutively.
580 long found = 0;
581 processorid_t next = 0;
582 while (found < *id_length && next < MAX_PROCESSOR_ID) {
583 processor_info_t info;
584 if (processor_info(next, &info) == 0) {
585 // NB, PI_NOINTR processors are effectively online ...
586 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
587 (*id_array)[found] = next;
588 found += 1;
589 }
590 }
591 next += 1;
592 }
593 if (found < *id_length) {
594 // The loop above didn't identify the expected number of processors.
595 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
596 // and re-running the loop, above, but there's no guarantee of progress
597 // if the system configuration is in flux. Instead, we just return what
598 // we've got. Note that in the worst case find_processors_online() could
599 // return an empty set. (As a fall-back in the case of the empty set we
600 // could just return the ID of the current processor).
601 *id_length = found ;
602 }
603
604 return true;
605 }
606
607 static bool assign_distribution(processorid_t* id_array,
608 uint id_length,
609 uint* distribution,
610 uint distribution_length) {
611 // We assume we can assign processorid_t's to uint's.
612 assert(sizeof(processorid_t) == sizeof(uint),
613 "can't convert processorid_t to uint");
614 // Quick check to see if we won't succeed.
615 if (id_length < distribution_length) {
616 return false;
617 }
618 // Assign processor ids to the distribution.
619 // Try to shuffle processors to distribute work across boards,
620 // assuming 4 processors per board.
621 const uint processors_per_board = ProcessDistributionStride;
622 // Find the maximum processor id.
623 processorid_t max_id = 0;
624 for (uint m = 0; m < id_length; m += 1) {
625 max_id = MAX2(max_id, id_array[m]);
626 }
627 // The next id, to limit loops.
628 const processorid_t limit_id = max_id + 1;
629 // Make up markers for available processors.
630 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id);
631 for (uint c = 0; c < limit_id; c += 1) {
632 available_id[c] = false;
633 }
634 for (uint a = 0; a < id_length; a += 1) {
635 available_id[id_array[a]] = true;
636 }
637 // Step by "boards", then by "slot", copying to "assigned".
638 // NEEDS_CLEANUP: The assignment of processors should be stateful,
639 // remembering which processors have been assigned by
640 // previous calls, etc., so as to distribute several
641 // independent calls of this method. What we'd like is
642 // It would be nice to have an API that let us ask
643 // how many processes are bound to a processor,
644 // but we don't have that, either.
645 // In the short term, "board" is static so that
646 // subsequent distributions don't all start at board 0.
647 static uint board = 0;
648 uint assigned = 0;
649 // Until we've found enough processors ....
650 while (assigned < distribution_length) {
651 // ... find the next available processor in the board.
652 for (uint slot = 0; slot < processors_per_board; slot += 1) {
653 uint try_id = board * processors_per_board + slot;
654 if ((try_id < limit_id) && (available_id[try_id] == true)) {
655 distribution[assigned] = try_id;
656 available_id[try_id] = false;
657 assigned += 1;
658 break;
659 }
660 }
661 board += 1;
662 if (board * processors_per_board + 0 >= limit_id) {
663 board = 0;
664 }
665 }
666 if (available_id != NULL) {
667 FREE_C_HEAP_ARRAY(bool, available_id);
668 }
669 return true;
670 }
671
672 bool os::distribute_processes(uint length, uint* distribution) {
673 bool result = false;
674 // Find the processor id's of all the available CPUs.
675 processorid_t* id_array = NULL;
676 uint id_length = 0;
677 // There are some races between querying information and using it,
678 // since processor sets can change dynamically.
679 psetid_t pset = PS_NONE;
680 // Are we running in a processor set?
681 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
682 result = find_processors_in_pset(pset, &id_array, &id_length);
683 } else {
684 result = find_processors_online(&id_array, &id_length);
685 }
686 if (result == true) {
687 if (id_length >= length) {
688 result = assign_distribution(id_array, id_length, distribution, length);
689 } else {
690 result = false;
691 }
692 }
693 if (id_array != NULL) {
694 FREE_C_HEAP_ARRAY(processorid_t, id_array);
695 }
696 return result;
697 }
698
699 bool os::bind_to_processor(uint processor_id) {
700 // We assume that a processorid_t can be stored in a uint.
701 assert(sizeof(uint) == sizeof(processorid_t),
702 "can't convert uint to processorid_t");
703 int bind_result =
704 processor_bind(P_LWPID, // bind LWP.
705 P_MYID, // bind current LWP.
706 (processorid_t) processor_id, // id.
707 NULL); // don't return old binding.
708 return (bind_result == 0);
709 }
710
711 bool os::getenv(const char* name, char* buffer, int len) {
712 char* val = ::getenv( name );
713 if ( val == NULL
714 || strlen(val) + 1 > len ) {
715 if (len > 0) buffer[0] = 0; // return a null string
716 return false;
717 }
718 strcpy( buffer, val );
719 return true;
720 }
721
722
723 // Return true if user is running as root.
724
725 bool os::have_special_privileges() {
726 static bool init = false;
727 static bool privileges = false;
728 if (!init) {
729 privileges = (getuid() != geteuid()) || (getgid() != getegid());
730 init = true;
731 }
732 return privileges;
733 }
734
735
736 void os::init_system_properties_values() {
737 char arch[12];
738 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch));
739
740 // The next steps are taken in the product version:
741 //
742 // Obtain the JAVA_HOME value from the location of libjvm[_g].so.
743 // This library should be located at:
744 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so.
745 //
746 // If "/jre/lib/" appears at the right place in the path, then we
747 // assume libjvm[_g].so is installed in a JDK and we use this path.
748 //
749 // Otherwise exit with message: "Could not create the Java virtual machine."
750 //
751 // The following extra steps are taken in the debugging version:
752 //
753 // If "/jre/lib/" does NOT appear at the right place in the path
754 // instead of exit check for $JAVA_HOME environment variable.
755 //
756 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
757 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so
758 // it looks like libjvm[_g].so is installed there
759 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so.
760 //
761 // Otherwise exit.
762 //
763 // Important note: if the location of libjvm.so changes this
764 // code needs to be changed accordingly.
765
766 // The next few definitions allow the code to be verbatim:
767 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n))
768 #define free(p) FREE_C_HEAP_ARRAY(char, p)
769 #define getenv(n) ::getenv(n)
770
771 #define EXTENSIONS_DIR "/lib/ext"
772 #define ENDORSED_DIR "/lib/endorsed"
773 #define COMMON_DIR "/usr/jdk/packages"
774
775 {
776 /* sysclasspath, java_home, dll_dir */
777 {
778 char *home_path;
779 char *dll_path;
780 char *pslash;
781 char buf[MAXPATHLEN];
782 os::jvm_path(buf, sizeof(buf));
783
784 // Found the full path to libjvm.so.
785 // Now cut the path to <java_home>/jre if we can.
786 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */
787 pslash = strrchr(buf, '/');
788 if (pslash != NULL)
789 *pslash = '\0'; /* get rid of /{client|server|hotspot} */
790 dll_path = malloc(strlen(buf) + 1);
791 if (dll_path == NULL)
792 return;
793 strcpy(dll_path, buf);
794 Arguments::set_dll_dir(dll_path);
795
796 if (pslash != NULL) {
797 pslash = strrchr(buf, '/');
798 if (pslash != NULL) {
799 *pslash = '\0'; /* get rid of /<arch> */
800 pslash = strrchr(buf, '/');
801 if (pslash != NULL)
802 *pslash = '\0'; /* get rid of /lib */
803 }
804 }
805
806 home_path = malloc(strlen(buf) + 1);
807 if (home_path == NULL)
808 return;
809 strcpy(home_path, buf);
810 Arguments::set_java_home(home_path);
811
812 if (!set_boot_path('/', ':'))
813 return;
814 }
815
816 /*
817 * Where to look for native libraries
818 */
819 {
820 // Use dlinfo() to determine the correct java.library.path.
821 //
822 // If we're launched by the Java launcher, and the user
823 // does not set java.library.path explicitly on the commandline,
824 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
825 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
826 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
827 // /usr/lib), which is exactly what we want.
828 //
829 // If the user does set java.library.path, it completely
830 // overwrites this setting, and always has.
831 //
832 // If we're not launched by the Java launcher, we may
833 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
834 // settings. Again, dlinfo does exactly what we want.
835
836 Dl_serinfo _info, *info = &_info;
837 Dl_serpath *path;
838 char* library_path;
839 char *common_path;
840 int i;
841
842 // determine search path count and required buffer size
843 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
844 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
845 }
846
847 // allocate new buffer and initialize
848 info = (Dl_serinfo*)malloc(_info.dls_size);
849 if (info == NULL) {
850 vm_exit_out_of_memory(_info.dls_size,
851 "init_system_properties_values info");
852 }
853 info->dls_size = _info.dls_size;
854 info->dls_cnt = _info.dls_cnt;
855
856 // obtain search path information
857 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
858 free(info);
859 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
860 }
861
862 path = &info->dls_serpath[0];
863
864 // Note: Due to a legacy implementation, most of the library path
865 // is set in the launcher. This was to accomodate linking restrictions
866 // on legacy Solaris implementations (which are no longer supported).
867 // Eventually, all the library path setting will be done here.
868 //
869 // However, to prevent the proliferation of improperly built native
870 // libraries, the new path component /usr/jdk/packages is added here.
871
872 // Determine the actual CPU architecture.
873 char cpu_arch[12];
874 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
875 #ifdef _LP64
876 // If we are a 64-bit vm, perform the following translations:
877 // sparc -> sparcv9
878 // i386 -> amd64
879 if (strcmp(cpu_arch, "sparc") == 0)
880 strcat(cpu_arch, "v9");
881 else if (strcmp(cpu_arch, "i386") == 0)
882 strcpy(cpu_arch, "amd64");
883 #endif
884
885 // Construct the invariant part of ld_library_path. Note that the
886 // space for the colon and the trailing null are provided by the
887 // nulls included by the sizeof operator.
888 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch);
889 common_path = malloc(bufsize);
890 if (common_path == NULL) {
891 free(info);
892 vm_exit_out_of_memory(bufsize,
893 "init_system_properties_values common_path");
894 }
895 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch);
896
897 // struct size is more than sufficient for the path components obtained
898 // through the dlinfo() call, so only add additional space for the path
899 // components explicitly added here.
900 bufsize = info->dls_size + strlen(common_path);
901 library_path = malloc(bufsize);
902 if (library_path == NULL) {
903 free(info);
904 free(common_path);
905 vm_exit_out_of_memory(bufsize,
906 "init_system_properties_values library_path");
907 }
908 library_path[0] = '\0';
909
910 // Construct the desired Java library path from the linker's library
911 // search path.
912 //
913 // For compatibility, it is optimal that we insert the additional path
914 // components specific to the Java VM after those components specified
915 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
916 // infrastructure.
917 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it
918 strcpy(library_path, common_path);
919 } else {
920 int inserted = 0;
921 for (i = 0; i < info->dls_cnt; i++, path++) {
922 uint_t flags = path->dls_flags & LA_SER_MASK;
923 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
924 strcat(library_path, common_path);
925 strcat(library_path, os::path_separator());
926 inserted = 1;
927 }
928 strcat(library_path, path->dls_name);
929 strcat(library_path, os::path_separator());
930 }
931 // eliminate trailing path separator
932 library_path[strlen(library_path)-1] = '\0';
933 }
934
935 // happens before argument parsing - can't use a trace flag
936 // tty->print_raw("init_system_properties_values: native lib path: ");
937 // tty->print_raw_cr(library_path);
938
939 // callee copies into its own buffer
940 Arguments::set_library_path(library_path);
941
942 free(common_path);
943 free(library_path);
944 free(info);
945 }
946
947 /*
948 * Extensions directories.
949 *
950 * Note that the space for the colon and the trailing null are provided
951 * by the nulls included by the sizeof operator (so actually one byte more
952 * than necessary is allocated).
953 */
954 {
955 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) +
956 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) +
957 sizeof(EXTENSIONS_DIR));
958 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR,
959 Arguments::get_java_home());
960 Arguments::set_ext_dirs(buf);
961 }
962
963 /* Endorsed standards default directory. */
964 {
965 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR));
966 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
967 Arguments::set_endorsed_dirs(buf);
968 }
969 }
970
971 #undef malloc
972 #undef free
973 #undef getenv
974 #undef EXTENSIONS_DIR
975 #undef ENDORSED_DIR
976 #undef COMMON_DIR
977
978 }
979
980 void os::breakpoint() {
981 BREAKPOINT;
982 }
983
984 bool os::obsolete_option(const JavaVMOption *option)
985 {
986 if (!strncmp(option->optionString, "-Xt", 3)) {
987 return true;
988 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
989 return true;
990 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
991 return true;
992 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
993 return true;
994 }
995 return false;
996 }
997
998 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
999 address stackStart = (address)thread->stack_base();
1000 address stackEnd = (address)(stackStart - (address)thread->stack_size());
1001 if (sp < stackStart && sp >= stackEnd ) return true;
1002 return false;
1003 }
1004
1005 extern "C" void breakpoint() {
1006 // use debugger to set breakpoint here
1007 }
1008
1009 // Returns an estimate of the current stack pointer. Result must be guaranteed to
1010 // point into the calling threads stack, and be no lower than the current stack
1011 // pointer.
1012 address os::current_stack_pointer() {
1013 volatile int dummy;
1014 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right
1015 return sp;
1016 }
1017
1018 static thread_t main_thread;
1019
1020 // Thread start routine for all new Java threads
1021 extern "C" void* java_start(void* thread_addr) {
1022 // Try to randomize the cache line index of hot stack frames.
1023 // This helps when threads of the same stack traces evict each other's
1024 // cache lines. The threads can be either from the same JVM instance, or
1025 // from different JVM instances. The benefit is especially true for
1026 // processors with hyperthreading technology.
1027 static int counter = 0;
1028 int pid = os::current_process_id();
1029 alloca(((pid ^ counter++) & 7) * 128);
1030
1031 int prio;
1032 Thread* thread = (Thread*)thread_addr;
1033 OSThread* osthr = thread->osthread();
1034
1035 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound
1036 thread->_schedctl = (void *) schedctl_init () ;
1037
1038 if (UseNUMA) {
1039 int lgrp_id = os::numa_get_group_id();
1040 if (lgrp_id != -1) {
1041 thread->set_lgrp_id(lgrp_id);
1042 }
1043 }
1044
1045 // If the creator called set priority before we started,
1046 // we need to call set priority now that we have an lwp.
1047 // Get the priority from libthread and set the priority
1048 // for the new Solaris lwp.
1049 if ( osthr->thread_id() != -1 ) {
1050 if ( UseThreadPriorities ) {
1051 thr_getprio(osthr->thread_id(), &prio);
1052 if (ThreadPriorityVerbose) {
1053 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 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 otherwise use NormalPriority
1352
1353 if ( UseThreadPriorities ) {
1354 thr_setprio(tid, (DefaultThreadPriority == -1) ?
1355 java_to_os_priority[NormPriority] :
1356 DefaultThreadPriority);
1357 }
1358
1359 // Initial thread state is INITIALIZED, not SUSPENDED
1360 osthread->set_state(INITIALIZED);
1361
1362 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1363 return true;
1364 }
1365
1366 /* defined for >= Solaris 10. This allows builds on earlier versions
1367 * of Solaris to take advantage of the newly reserved Solaris JVM signals
1368 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1369 * and -XX:+UseAltSigs does nothing since these should have no conflict
1370 */
1371 #if !defined(SIGJVM1)
1372 #define SIGJVM1 39
1373 #define SIGJVM2 40
1374 #endif
1375
1376 debug_only(static bool signal_sets_initialized = false);
1377 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1378 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1379 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1380
1381 bool os::Solaris::is_sig_ignored(int sig) {
1382 struct sigaction oact;
1383 sigaction(sig, (struct sigaction*)NULL, &oact);
1384 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1385 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1386 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
1387 return true;
1388 else
1389 return false;
1390 }
1391
1392 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1393 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1394 static bool isJVM1available() {
1395 return SIGJVM1 < SIGRTMIN;
1396 }
1397
1398 void os::Solaris::signal_sets_init() {
1399 // Should also have an assertion stating we are still single-threaded.
1400 assert(!signal_sets_initialized, "Already initialized");
1401 // Fill in signals that are necessarily unblocked for all threads in
1402 // the VM. Currently, we unblock the following signals:
1403 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1404 // by -Xrs (=ReduceSignalUsage));
1405 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1406 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1407 // the dispositions or masks wrt these signals.
1408 // Programs embedding the VM that want to use the above signals for their
1409 // own purposes must, at this time, use the "-Xrs" option to prevent
1410 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1411 // (See bug 4345157, and other related bugs).
1412 // In reality, though, unblocking these signals is really a nop, since
1413 // these signals are not blocked by default.
1414 sigemptyset(&unblocked_sigs);
1415 sigemptyset(&allowdebug_blocked_sigs);
1416 sigaddset(&unblocked_sigs, SIGILL);
1417 sigaddset(&unblocked_sigs, SIGSEGV);
1418 sigaddset(&unblocked_sigs, SIGBUS);
1419 sigaddset(&unblocked_sigs, SIGFPE);
1420
1421 if (isJVM1available) {
1422 os::Solaris::set_SIGinterrupt(SIGJVM1);
1423 os::Solaris::set_SIGasync(SIGJVM2);
1424 } else if (UseAltSigs) {
1425 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1426 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1427 } else {
1428 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1429 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1430 }
1431
1432 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1433 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1434
1435 if (!ReduceSignalUsage) {
1436 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1437 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1438 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1439 }
1440 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1441 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1442 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1443 }
1444 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1445 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1446 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1447 }
1448 }
1449 // Fill in signals that are blocked by all but the VM thread.
1450 sigemptyset(&vm_sigs);
1451 if (!ReduceSignalUsage)
1452 sigaddset(&vm_sigs, BREAK_SIGNAL);
1453 debug_only(signal_sets_initialized = true);
1454
1455 // For diagnostics only used in run_periodic_checks
1456 sigemptyset(&check_signal_done);
1457 }
1458
1459 // These are signals that are unblocked while a thread is running Java.
1460 // (For some reason, they get blocked by default.)
1461 sigset_t* os::Solaris::unblocked_signals() {
1462 assert(signal_sets_initialized, "Not initialized");
1463 return &unblocked_sigs;
1464 }
1465
1466 // These are the signals that are blocked while a (non-VM) thread is
1467 // running Java. Only the VM thread handles these signals.
1468 sigset_t* os::Solaris::vm_signals() {
1469 assert(signal_sets_initialized, "Not initialized");
1470 return &vm_sigs;
1471 }
1472
1473 // These are signals that are blocked during cond_wait to allow debugger in
1474 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1475 assert(signal_sets_initialized, "Not initialized");
1476 return &allowdebug_blocked_sigs;
1477 }
1478
1479
1480 void _handle_uncaught_cxx_exception() {
1481 VMError err("An uncaught C++ exception");
1482 err.report_and_die();
1483 }
1484
1485
1486 // First crack at OS-specific initialization, from inside the new thread.
1487 void os::initialize_thread() {
1488 int r = thr_main() ;
1489 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
1490 if (r) {
1491 JavaThread* jt = (JavaThread *)Thread::current();
1492 assert(jt != NULL,"Sanity check");
1493 size_t stack_size;
1494 address base = jt->stack_base();
1495 if (Arguments::created_by_java_launcher()) {
1496 // Use 2MB to allow for Solaris 7 64 bit mode.
1497 stack_size = JavaThread::stack_size_at_create() == 0
1498 ? 2048*K : JavaThread::stack_size_at_create();
1499
1500 // There are rare cases when we may have already used more than
1501 // the basic stack size allotment before this method is invoked.
1502 // Attempt to allow for a normally sized java_stack.
1503 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1504 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1505 } else {
1506 // 6269555: If we were not created by a Java launcher, i.e. if we are
1507 // running embedded in a native application, treat the primordial thread
1508 // as much like a native attached thread as possible. This means using
1509 // the current stack size from thr_stksegment(), unless it is too large
1510 // to reliably setup guard pages. A reasonable max size is 8MB.
1511 size_t current_size = current_stack_size();
1512 // This should never happen, but just in case....
1513 if (current_size == 0) current_size = 2 * K * K;
1514 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1515 }
1516 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1517 stack_size = (size_t)(base - bottom);
1518
1519 assert(stack_size > 0, "Stack size calculation problem");
1520
1521 if (stack_size > jt->stack_size()) {
1522 NOT_PRODUCT(
1523 struct rlimit limits;
1524 getrlimit(RLIMIT_STACK, &limits);
1525 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1526 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1527 )
1528 tty->print_cr(
1529 "Stack size of %d Kb exceeds current limit of %d Kb.\n"
1530 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1531 "See limit(1) to increase the stack size limit.",
1532 stack_size / K, jt->stack_size() / K);
1533 vm_exit(1);
1534 }
1535 assert(jt->stack_size() >= stack_size,
1536 "Attempt to map more stack than was allocated");
1537 jt->set_stack_size(stack_size);
1538 }
1539
1540 // 5/22/01: Right now alternate signal stacks do not handle
1541 // throwing stack overflow exceptions, see bug 4463178
1542 // Until a fix is found for this, T2 will NOT imply alternate signal
1543 // stacks.
1544 // If using T2 libthread threads, install an alternate signal stack.
1545 // Because alternate stacks associate with LWPs on Solaris,
1546 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads
1547 // we prefer to explicitly stack bang.
1548 // If not using T2 libthread, but using UseBoundThreads any threads
1549 // (primordial thread, jni_attachCurrentThread) we do not create,
1550 // probably are not bound, therefore they can not have an alternate
1551 // signal stack. Since our stack banging code is generated and
1552 // is shared across threads, all threads must be bound to allow
1553 // using alternate signal stacks. The alternative is to interpose
1554 // on _lwp_create to associate an alt sig stack with each LWP,
1555 // and this could be a problem when the JVM is embedded.
1556 // We would prefer to use alternate signal stacks with T2
1557 // Since there is currently no accurate way to detect T2
1558 // we do not. Assuming T2 when running T1 causes sig 11s or assertions
1559 // on installing alternate signal stacks
1560
1561
1562 // 05/09/03: removed alternate signal stack support for Solaris
1563 // The alternate signal stack mechanism is no longer needed to
1564 // handle stack overflow. This is now handled by allocating
1565 // guard pages (red zone) and stackbanging.
1566 // Initially the alternate signal stack mechanism was removed because
1567 // it did not work with T1 llibthread. Alternate
1568 // signal stacks MUST have all threads bound to lwps. Applications
1569 // can create their own threads and attach them without their being
1570 // bound under T1. This is frequently the case for the primordial thread.
1571 // If we were ever to reenable this mechanism we would need to
1572 // use the dynamic check for T2 libthread.
1573
1574 os::Solaris::init_thread_fpu_state();
1575 std::set_terminate(_handle_uncaught_cxx_exception);
1576 }
1577
1578
1579
1580 // Free Solaris resources related to the OSThread
1581 void os::free_thread(OSThread* osthread) {
1582 assert(osthread != NULL, "os::free_thread but osthread not set");
1583
1584
1585 // We are told to free resources of the argument thread,
1586 // but we can only really operate on the current thread.
1587 // The main thread must take the VMThread down synchronously
1588 // before the main thread exits and frees up CodeHeap
1589 guarantee((Thread::current()->osthread() == osthread
1590 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1591 if (Thread::current()->osthread() == osthread) {
1592 // Restore caller's signal mask
1593 sigset_t sigmask = osthread->caller_sigmask();
1594 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1595 }
1596 delete osthread;
1597 }
1598
1599 void os::pd_start_thread(Thread* thread) {
1600 int status = thr_continue(thread->osthread()->thread_id());
1601 assert_status(status == 0, status, "thr_continue failed");
1602 }
1603
1604
1605 intx os::current_thread_id() {
1606 return (intx)thr_self();
1607 }
1608
1609 static pid_t _initial_pid = 0;
1610
1611 int os::current_process_id() {
1612 return (int)(_initial_pid ? _initial_pid : getpid());
1613 }
1614
1615 int os::allocate_thread_local_storage() {
1616 // %%% in Win32 this allocates a memory segment pointed to by a
1617 // register. Dan Stein can implement a similar feature in
1618 // Solaris. Alternatively, the VM can do the same thing
1619 // explicitly: malloc some storage and keep the pointer in a
1620 // register (which is part of the thread's context) (or keep it
1621 // in TLS).
1622 // %%% In current versions of Solaris, thr_self and TSD can
1623 // be accessed via short sequences of displaced indirections.
1624 // The value of thr_self is available as %g7(36).
1625 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1626 // assuming that the current thread already has a value bound to k.
1627 // It may be worth experimenting with such access patterns,
1628 // and later having the parameters formally exported from a Solaris
1629 // interface. I think, however, that it will be faster to
1630 // maintain the invariant that %g2 always contains the
1631 // JavaThread in Java code, and have stubs simply
1632 // treat %g2 as a caller-save register, preserving it in a %lN.
1633 thread_key_t tk;
1634 if (thr_keycreate( &tk, NULL ) )
1635 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1636 "(%s)", strerror(errno)));
1637 return int(tk);
1638 }
1639
1640 void os::free_thread_local_storage(int index) {
1641 // %%% don't think we need anything here
1642 // if ( pthread_key_delete((pthread_key_t) tk) )
1643 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1644 }
1645
1646 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific
1647 // small number - point is NO swap space available
1648 void os::thread_local_storage_at_put(int index, void* value) {
1649 // %%% this is used only in threadLocalStorage.cpp
1650 if (thr_setspecific((thread_key_t)index, value)) {
1651 if (errno == ENOMEM) {
1652 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space");
1653 } else {
1654 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1655 "(%s)", strerror(errno)));
1656 }
1657 } else {
1658 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ;
1659 }
1660 }
1661
1662 // This function could be called before TLS is initialized, for example, when
1663 // VM receives an async signal or when VM causes a fatal error during
1664 // initialization. Return NULL if thr_getspecific() fails.
1665 void* os::thread_local_storage_at(int index) {
1666 // %%% this is used only in threadLocalStorage.cpp
1667 void* r = NULL;
1668 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1669 }
1670
1671
1672 const int NANOSECS_PER_MILLISECS = 1000000;
1673 // gethrtime can move backwards if read from one cpu and then a different cpu
1674 // getTimeNanos is guaranteed to not move backward on Solaris
1675 // local spinloop created as faster for a CAS on an int than
1676 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not
1677 // supported on sparc v8 or pre supports_cx8 intel boxes.
1678 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong
1679 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes
1680 inline hrtime_t oldgetTimeNanos() {
1681 int gotlock = LOCK_INVALID;
1682 hrtime_t newtime = gethrtime();
1683
1684 for (;;) {
1685 // grab lock for max_hrtime
1686 int curlock = max_hrtime_lock;
1687 if (curlock & LOCK_BUSY) continue;
1688 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue;
1689 if (newtime > max_hrtime) {
1690 max_hrtime = newtime;
1691 } else {
1692 newtime = max_hrtime;
1693 }
1694 // release lock
1695 max_hrtime_lock = LOCK_FREE;
1696 return newtime;
1697 }
1698 }
1699 // gethrtime can move backwards if read from one cpu and then a different cpu
1700 // getTimeNanos is guaranteed to not move backward on Solaris
1701 inline hrtime_t getTimeNanos() {
1702 if (VM_Version::supports_cx8()) {
1703 const hrtime_t now = gethrtime();
1704 // Use atomic long load since 32-bit x86 uses 2 registers to keep long.
1705 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime);
1706 if (now <= prev) return prev; // same or retrograde time;
1707 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1708 assert(obsv >= prev, "invariant"); // Monotonicity
1709 // If the CAS succeeded then we're done and return "now".
1710 // If the CAS failed and the observed value "obs" is >= now then
1711 // we should return "obs". If the CAS failed and now > obs > prv then
1712 // some other thread raced this thread and installed a new value, in which case
1713 // we could either (a) retry the entire operation, (b) retry trying to install now
1714 // or (c) just return obs. We use (c). No loop is required although in some cases
1715 // we might discard a higher "now" value in deference to a slightly lower but freshly
1716 // installed obs value. That's entirely benign -- it admits no new orderings compared
1717 // to (a) or (b) -- and greatly reduces coherence traffic.
1718 // We might also condition (c) on the magnitude of the delta between obs and now.
1719 // Avoiding excessive CAS operations to hot RW locations is critical.
1720 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate
1721 return (prev == obsv) ? now : obsv ;
1722 } else {
1723 return oldgetTimeNanos();
1724 }
1725 }
1726
1727 // Time since start-up in seconds to a fine granularity.
1728 // Used by VMSelfDestructTimer and the MemProfiler.
1729 double os::elapsedTime() {
1730 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1731 }
1732
1733 jlong os::elapsed_counter() {
1734 return (jlong)(getTimeNanos() - first_hrtime);
1735 }
1736
1737 jlong os::elapsed_frequency() {
1738 return hrtime_hz;
1739 }
1740
1741 // Return the real, user, and system times in seconds from an
1742 // arbitrary fixed point in the past.
1743 bool os::getTimesSecs(double* process_real_time,
1744 double* process_user_time,
1745 double* process_system_time) {
1746 struct tms ticks;
1747 clock_t real_ticks = times(&ticks);
1748
1749 if (real_ticks == (clock_t) (-1)) {
1750 return false;
1751 } else {
1752 double ticks_per_second = (double) clock_tics_per_sec;
1753 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1754 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1755 // For consistency return the real time from getTimeNanos()
1756 // converted to seconds.
1757 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1758
1759 return true;
1760 }
1761 }
1762
1763 bool os::supports_vtime() { return true; }
1764
1765 bool os::enable_vtime() {
1766 int fd = ::open("/proc/self/ctl", O_WRONLY);
1767 if (fd == -1)
1768 return false;
1769
1770 long cmd[] = { PCSET, PR_MSACCT };
1771 int res = ::write(fd, cmd, sizeof(long) * 2);
1772 ::close(fd);
1773 if (res != sizeof(long) * 2)
1774 return false;
1775
1776 return true;
1777 }
1778
1779 bool os::vtime_enabled() {
1780 int fd = ::open("/proc/self/status", O_RDONLY);
1781 if (fd == -1)
1782 return false;
1783
1784 pstatus_t status;
1785 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1786 ::close(fd);
1787 if (res != sizeof(pstatus_t))
1788 return false;
1789
1790 return status.pr_flags & PR_MSACCT;
1791 }
1792
1793 double os::elapsedVTime() {
1794 return (double)gethrvtime() / (double)hrtime_hz;
1795 }
1796
1797 // Used internally for comparisons only
1798 // getTimeMillis guaranteed to not move backwards on Solaris
1799 jlong getTimeMillis() {
1800 jlong nanotime = getTimeNanos();
1801 return (jlong)(nanotime / NANOSECS_PER_MILLISECS);
1802 }
1803
1804 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1805 jlong os::javaTimeMillis() {
1806 timeval t;
1807 if (gettimeofday( &t, NULL) == -1)
1808 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1809 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1810 }
1811
1812 jlong os::javaTimeNanos() {
1813 return (jlong)getTimeNanos();
1814 }
1815
1816 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1817 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1818 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1819 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1820 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1821 }
1822
1823 char * os::local_time_string(char *buf, size_t buflen) {
1824 struct tm t;
1825 time_t long_time;
1826 time(&long_time);
1827 localtime_r(&long_time, &t);
1828 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1829 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1830 t.tm_hour, t.tm_min, t.tm_sec);
1831 return buf;
1832 }
1833
1834 // Note: os::shutdown() might be called very early during initialization, or
1835 // called from signal handler. Before adding something to os::shutdown(), make
1836 // sure it is async-safe and can handle partially initialized VM.
1837 void os::shutdown() {
1838
1839 // allow PerfMemory to attempt cleanup of any persistent resources
1840 perfMemory_exit();
1841
1842 // needs to remove object in file system
1843 AttachListener::abort();
1844
1845 // flush buffered output, finish log files
1846 ostream_abort();
1847
1848 // Check for abort hook
1849 abort_hook_t abort_hook = Arguments::abort_hook();
1850 if (abort_hook != NULL) {
1851 abort_hook();
1852 }
1853 }
1854
1855 // Note: os::abort() might be called very early during initialization, or
1856 // called from signal handler. Before adding something to os::abort(), make
1857 // sure it is async-safe and can handle partially initialized VM.
1858 void os::abort(bool dump_core) {
1859 os::shutdown();
1860 if (dump_core) {
1861 #ifndef PRODUCT
1862 fdStream out(defaultStream::output_fd());
1863 out.print_raw("Current thread is ");
1864 char buf[16];
1865 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1866 out.print_raw_cr(buf);
1867 out.print_raw_cr("Dumping core ...");
1868 #endif
1869 ::abort(); // dump core (for debugging)
1870 }
1871
1872 ::exit(1);
1873 }
1874
1875 // Die immediately, no exit hook, no abort hook, no cleanup.
1876 void os::die() {
1877 _exit(-1);
1878 }
1879
1880 // unused
1881 void os::set_error_file(const char *logfile) {}
1882
1883 // DLL functions
1884
1885 const char* os::dll_file_extension() { return ".so"; }
1886
1887 // This must be hard coded because it's the system's temporary
1888 // directory not the java application's temp directory, ala java.io.tmpdir.
1889 const char* os::get_temp_directory() { return "/tmp"; }
1890
1891 static bool file_exists(const char* filename) {
1892 struct stat statbuf;
1893 if (filename == NULL || strlen(filename) == 0) {
1894 return false;
1895 }
1896 return os::stat(filename, &statbuf) == 0;
1897 }
1898
1899 void os::dll_build_name(char* buffer, size_t buflen,
1900 const char* pname, const char* fname) {
1901 const size_t pnamelen = pname ? strlen(pname) : 0;
1902
1903 // Quietly truncate on buffer overflow. Should be an error.
1904 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1905 *buffer = '\0';
1906 return;
1907 }
1908
1909 if (pnamelen == 0) {
1910 snprintf(buffer, buflen, "lib%s.so", fname);
1911 } else if (strchr(pname, *os::path_separator()) != NULL) {
1912 int n;
1913 char** pelements = split_path(pname, &n);
1914 for (int i = 0 ; i < n ; i++) {
1915 // really shouldn't be NULL but what the heck, check can't hurt
1916 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1917 continue; // skip the empty path values
1918 }
1919 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1920 if (file_exists(buffer)) {
1921 break;
1922 }
1923 }
1924 // release the storage
1925 for (int i = 0 ; i < n ; i++) {
1926 if (pelements[i] != NULL) {
1927 FREE_C_HEAP_ARRAY(char, pelements[i]);
1928 }
1929 }
1930 if (pelements != NULL) {
1931 FREE_C_HEAP_ARRAY(char*, pelements);
1932 }
1933 } else {
1934 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1935 }
1936 }
1937
1938 const char* os::get_current_directory(char *buf, int buflen) {
1939 return getcwd(buf, buflen);
1940 }
1941
1942 // check if addr is inside libjvm[_g].so
1943 bool os::address_is_in_vm(address addr) {
1944 static address libjvm_base_addr;
1945 Dl_info dlinfo;
1946
1947 if (libjvm_base_addr == NULL) {
1948 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
1949 libjvm_base_addr = (address)dlinfo.dli_fbase;
1950 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1951 }
1952
1953 if (dladdr((void *)addr, &dlinfo)) {
1954 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1955 }
1956
1957 return false;
1958 }
1959
1960 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int);
1961 static dladdr1_func_type dladdr1_func = NULL;
1962
1963 bool os::dll_address_to_function_name(address addr, char *buf,
1964 int buflen, int * offset) {
1965 Dl_info dlinfo;
1966
1967 // dladdr1_func was initialized in os::init()
1968 if (dladdr1_func){
1969 // yes, we have dladdr1
1970
1971 // Support for dladdr1 is checked at runtime; it may be
1972 // available even if the vm is built on a machine that does
1973 // not have dladdr1 support. Make sure there is a value for
1974 // RTLD_DL_SYMENT.
1975 #ifndef RTLD_DL_SYMENT
1976 #define RTLD_DL_SYMENT 1
1977 #endif
1978 #ifdef _LP64
1979 Elf64_Sym * info;
1980 #else
1981 Elf32_Sym * info;
1982 #endif
1983 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1984 RTLD_DL_SYMENT)) {
1985 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1986 if (buf != NULL) {
1987 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
1988 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1989 }
1990 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1991 return true;
1992 }
1993 }
1994 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
1995 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1996 dlinfo.dli_fname, buf, buflen, offset) == Decoder::no_error) {
1997 return true;
1998 }
1999 }
2000 if (buf != NULL) buf[0] = '\0';
2001 if (offset != NULL) *offset = -1;
2002 return false;
2003 } else {
2004 // no, only dladdr is available
2005 if (dladdr((void *)addr, &dlinfo)) {
2006 if (buf != NULL) {
2007 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
2008 jio_snprintf(buf, buflen, dlinfo.dli_sname);
2009 }
2010 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
2011 return true;
2012 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
2013 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
2014 dlinfo.dli_fname, buf, buflen, offset) == Decoder::no_error) {
2015 return true;
2016 }
2017 }
2018 if (buf != NULL) buf[0] = '\0';
2019 if (offset != NULL) *offset = -1;
2020 return false;
2021 }
2022 }
2023
2024 bool os::dll_address_to_library_name(address addr, char* buf,
2025 int buflen, int* offset) {
2026 Dl_info dlinfo;
2027
2028 if (dladdr((void*)addr, &dlinfo)){
2029 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
2030 if (offset) *offset = addr - (address)dlinfo.dli_fbase;
2031 return true;
2032 } else {
2033 if (buf) buf[0] = '\0';
2034 if (offset) *offset = -1;
2035 return false;
2036 }
2037 }
2038
2039 // Prints the names and full paths of all opened dynamic libraries
2040 // for current process
2041 void os::print_dll_info(outputStream * st) {
2042 Dl_info dli;
2043 void *handle;
2044 Link_map *map;
2045 Link_map *p;
2046
2047 st->print_cr("Dynamic libraries:"); st->flush();
2048
2049 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) {
2050 st->print_cr("Error: Cannot print dynamic libraries.");
2051 return;
2052 }
2053 handle = dlopen(dli.dli_fname, RTLD_LAZY);
2054 if (handle == NULL) {
2055 st->print_cr("Error: Cannot print dynamic libraries.");
2056 return;
2057 }
2058 dlinfo(handle, RTLD_DI_LINKMAP, &map);
2059 if (map == NULL) {
2060 st->print_cr("Error: Cannot print dynamic libraries.");
2061 return;
2062 }
2063
2064 while (map->l_prev != NULL)
2065 map = map->l_prev;
2066
2067 while (map != NULL) {
2068 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
2069 map = map->l_next;
2070 }
2071
2072 dlclose(handle);
2073 }
2074
2075 // Loads .dll/.so and
2076 // in case of error it checks if .dll/.so was built for the
2077 // same architecture as Hotspot is running on
2078
2079 void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
2080 {
2081 void * result= ::dlopen(filename, RTLD_LAZY);
2082 if (result != NULL) {
2083 // Successful loading
2084 return result;
2085 }
2086
2087 Elf32_Ehdr elf_head;
2088
2089 // Read system error message into ebuf
2090 // It may or may not be overwritten below
2091 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
2092 ebuf[ebuflen-1]='\0';
2093 int diag_msg_max_length=ebuflen-strlen(ebuf);
2094 char* diag_msg_buf=ebuf+strlen(ebuf);
2095
2096 if (diag_msg_max_length==0) {
2097 // No more space in ebuf for additional diagnostics message
2098 return NULL;
2099 }
2100
2101
2102 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
2103
2104 if (file_descriptor < 0) {
2105 // Can't open library, report dlerror() message
2106 return NULL;
2107 }
2108
2109 bool failed_to_read_elf_head=
2110 (sizeof(elf_head)!=
2111 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
2112
2113 ::close(file_descriptor);
2114 if (failed_to_read_elf_head) {
2115 // file i/o error - report dlerror() msg
2116 return NULL;
2117 }
2118
2119 typedef struct {
2120 Elf32_Half code; // Actual value as defined in elf.h
2121 Elf32_Half compat_class; // Compatibility of archs at VM's sense
2122 char elf_class; // 32 or 64 bit
2123 char endianess; // MSB or LSB
2124 char* name; // String representation
2125 } arch_t;
2126
2127 static const arch_t arch_array[]={
2128 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2129 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2130 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
2131 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
2132 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2133 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2134 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
2135 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
2136 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
2137 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
2138 };
2139
2140 #if (defined IA32)
2141 static Elf32_Half running_arch_code=EM_386;
2142 #elif (defined AMD64)
2143 static Elf32_Half running_arch_code=EM_X86_64;
2144 #elif (defined IA64)
2145 static Elf32_Half running_arch_code=EM_IA_64;
2146 #elif (defined __sparc) && (defined _LP64)
2147 static Elf32_Half running_arch_code=EM_SPARCV9;
2148 #elif (defined __sparc) && (!defined _LP64)
2149 static Elf32_Half running_arch_code=EM_SPARC;
2150 #elif (defined __powerpc64__)
2151 static Elf32_Half running_arch_code=EM_PPC64;
2152 #elif (defined __powerpc__)
2153 static Elf32_Half running_arch_code=EM_PPC;
2154 #elif (defined ARM)
2155 static Elf32_Half running_arch_code=EM_ARM;
2156 #else
2157 #error Method os::dll_load requires that one of following is defined:\
2158 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
2159 #endif
2160
2161 // Identify compatability class for VM's architecture and library's architecture
2162 // Obtain string descriptions for architectures
2163
2164 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
2165 int running_arch_index=-1;
2166
2167 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
2168 if (running_arch_code == arch_array[i].code) {
2169 running_arch_index = i;
2170 }
2171 if (lib_arch.code == arch_array[i].code) {
2172 lib_arch.compat_class = arch_array[i].compat_class;
2173 lib_arch.name = arch_array[i].name;
2174 }
2175 }
2176
2177 assert(running_arch_index != -1,
2178 "Didn't find running architecture code (running_arch_code) in arch_array");
2179 if (running_arch_index == -1) {
2180 // Even though running architecture detection failed
2181 // we may still continue with reporting dlerror() message
2182 return NULL;
2183 }
2184
2185 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
2186 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
2187 return NULL;
2188 }
2189
2190 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
2191 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
2192 return NULL;
2193 }
2194
2195 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
2196 if ( lib_arch.name!=NULL ) {
2197 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2198 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
2199 lib_arch.name, arch_array[running_arch_index].name);
2200 } else {
2201 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2202 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
2203 lib_arch.code,
2204 arch_array[running_arch_index].name);
2205 }
2206 }
2207
2208 return NULL;
2209 }
2210
2211 void* os::dll_lookup(void* handle, const char* name) {
2212 return dlsym(handle, name);
2213 }
2214
2215 int os::stat(const char *path, struct stat *sbuf) {
2216 char pathbuf[MAX_PATH];
2217 if (strlen(path) > MAX_PATH - 1) {
2218 errno = ENAMETOOLONG;
2219 return -1;
2220 }
2221 os::native_path(strcpy(pathbuf, path));
2222 return ::stat(pathbuf, sbuf);
2223 }
2224
2225 static bool _print_ascii_file(const char* filename, outputStream* st) {
2226 int fd = ::open(filename, O_RDONLY);
2227 if (fd == -1) {
2228 return false;
2229 }
2230
2231 char buf[32];
2232 int bytes;
2233 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
2234 st->print_raw(buf, bytes);
2235 }
2236
2237 ::close(fd);
2238
2239 return true;
2240 }
2241
2242 void os::print_os_info(outputStream* st) {
2243 st->print("OS:");
2244
2245 if (!_print_ascii_file("/etc/release", st)) {
2246 st->print("Solaris");
2247 }
2248 st->cr();
2249
2250 // kernel
2251 st->print("uname:");
2252 struct utsname name;
2253 uname(&name);
2254 st->print(name.sysname); st->print(" ");
2255 st->print(name.release); st->print(" ");
2256 st->print(name.version); st->print(" ");
2257 st->print(name.machine);
2258
2259 // libthread
2260 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)");
2261 else st->print(" (T1 libthread)");
2262 st->cr();
2263
2264 // rlimit
2265 st->print("rlimit:");
2266 struct rlimit rlim;
2267
2268 st->print(" STACK ");
2269 getrlimit(RLIMIT_STACK, &rlim);
2270 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
2271 else st->print("%uk", rlim.rlim_cur >> 10);
2272
2273 st->print(", CORE ");
2274 getrlimit(RLIMIT_CORE, &rlim);
2275 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
2276 else st->print("%uk", rlim.rlim_cur >> 10);
2277
2278 st->print(", NOFILE ");
2279 getrlimit(RLIMIT_NOFILE, &rlim);
2280 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
2281 else st->print("%d", rlim.rlim_cur);
2282
2283 st->print(", AS ");
2284 getrlimit(RLIMIT_AS, &rlim);
2285 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
2286 else st->print("%uk", rlim.rlim_cur >> 10);
2287 st->cr();
2288
2289 // load average
2290 st->print("load average:");
2291 double loadavg[3];
2292 os::loadavg(loadavg, 3);
2293 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]);
2294 st->cr();
2295 }
2296
2297
2298 static bool check_addr0(outputStream* st) {
2299 jboolean status = false;
2300 int fd = ::open("/proc/self/map",O_RDONLY);
2301 if (fd >= 0) {
2302 prmap_t p;
2303 while(::read(fd, &p, sizeof(p)) > 0) {
2304 if (p.pr_vaddr == 0x0) {
2305 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
2306 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
2307 st->print("Access:");
2308 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
2309 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
2310 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
2311 st->cr();
2312 status = true;
2313 }
2314 ::close(fd);
2315 }
2316 }
2317 return status;
2318 }
2319
2320 void os::pd_print_cpu_info(outputStream* st) {
2321 // Nothing to do for now.
2322 }
2323
2324 void os::print_memory_info(outputStream* st) {
2325 st->print("Memory:");
2326 st->print(" %dk page", os::vm_page_size()>>10);
2327 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2328 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2329 st->cr();
2330 (void) check_addr0(st);
2331 }
2332
2333 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific
2334 // but they're the same for all the solaris architectures that we support.
2335 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR",
2336 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG",
2337 "ILL_COPROC", "ILL_BADSTK" };
2338
2339 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV",
2340 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES",
2341 "FPE_FLTINV", "FPE_FLTSUB" };
2342
2343 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" };
2344
2345 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" };
2346
2347 void os::print_siginfo(outputStream* st, void* siginfo) {
2348 st->print("siginfo:");
2349
2350 const int buflen = 100;
2351 char buf[buflen];
2352 siginfo_t *si = (siginfo_t*)siginfo;
2353 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen));
2354 char *err = strerror(si->si_errno);
2355 if (si->si_errno != 0 && err != NULL) {
2356 st->print("si_errno=%s", err);
2357 } else {
2358 st->print("si_errno=%d", si->si_errno);
2359 }
2360 const int c = si->si_code;
2361 assert(c > 0, "unexpected si_code");
2362 switch (si->si_signo) {
2363 case SIGILL:
2364 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]);
2365 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2366 break;
2367 case SIGFPE:
2368 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]);
2369 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2370 break;
2371 case SIGSEGV:
2372 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]);
2373 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2374 break;
2375 case SIGBUS:
2376 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]);
2377 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2378 break;
2379 default:
2380 st->print(", si_code=%d", si->si_code);
2381 // no si_addr
2382 }
2383
2384 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2385 UseSharedSpaces) {
2386 FileMapInfo* mapinfo = FileMapInfo::current_info();
2387 if (mapinfo->is_in_shared_space(si->si_addr)) {
2388 st->print("\n\nError accessing class data sharing archive." \
2389 " Mapped file inaccessible during execution, " \
2390 " possible disk/network problem.");
2391 }
2392 }
2393 st->cr();
2394 }
2395
2396 // Moved from whole group, because we need them here for diagnostic
2397 // prints.
2398 #define OLDMAXSIGNUM 32
2399 static int Maxsignum = 0;
2400 static int *ourSigFlags = NULL;
2401
2402 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2403
2404 int os::Solaris::get_our_sigflags(int sig) {
2405 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2406 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2407 return ourSigFlags[sig];
2408 }
2409
2410 void os::Solaris::set_our_sigflags(int sig, int flags) {
2411 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2412 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2413 ourSigFlags[sig] = flags;
2414 }
2415
2416
2417 static const char* get_signal_handler_name(address handler,
2418 char* buf, int buflen) {
2419 int offset;
2420 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2421 if (found) {
2422 // skip directory names
2423 const char *p1, *p2;
2424 p1 = buf;
2425 size_t len = strlen(os::file_separator());
2426 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2427 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2428 } else {
2429 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2430 }
2431 return buf;
2432 }
2433
2434 static void print_signal_handler(outputStream* st, int sig,
2435 char* buf, size_t buflen) {
2436 struct sigaction sa;
2437
2438 sigaction(sig, NULL, &sa);
2439
2440 st->print("%s: ", os::exception_name(sig, buf, buflen));
2441
2442 address handler = (sa.sa_flags & SA_SIGINFO)
2443 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2444 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2445
2446 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2447 st->print("SIG_DFL");
2448 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2449 st->print("SIG_IGN");
2450 } else {
2451 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2452 }
2453
2454 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask);
2455
2456 address rh = VMError::get_resetted_sighandler(sig);
2457 // May be, handler was resetted by VMError?
2458 if(rh != NULL) {
2459 handler = rh;
2460 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2461 }
2462
2463 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags);
2464
2465 // Check: is it our handler?
2466 if(handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2467 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2468 // It is our signal handler
2469 // check for flags
2470 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2471 st->print(
2472 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2473 os::Solaris::get_our_sigflags(sig));
2474 }
2475 }
2476 st->cr();
2477 }
2478
2479 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2480 st->print_cr("Signal Handlers:");
2481 print_signal_handler(st, SIGSEGV, buf, buflen);
2482 print_signal_handler(st, SIGBUS , buf, buflen);
2483 print_signal_handler(st, SIGFPE , buf, buflen);
2484 print_signal_handler(st, SIGPIPE, buf, buflen);
2485 print_signal_handler(st, SIGXFSZ, buf, buflen);
2486 print_signal_handler(st, SIGILL , buf, buflen);
2487 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2488 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2489 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2490 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2491 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2492 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2493 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2494 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2495 }
2496
2497 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2498
2499 // Find the full path to the current module, libjvm.so or libjvm_g.so
2500 void os::jvm_path(char *buf, jint buflen) {
2501 // Error checking.
2502 if (buflen < MAXPATHLEN) {
2503 assert(false, "must use a large-enough buffer");
2504 buf[0] = '\0';
2505 return;
2506 }
2507 // Lazy resolve the path to current module.
2508 if (saved_jvm_path[0] != 0) {
2509 strcpy(buf, saved_jvm_path);
2510 return;
2511 }
2512
2513 Dl_info dlinfo;
2514 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2515 assert(ret != 0, "cannot locate libjvm");
2516 realpath((char *)dlinfo.dli_fname, buf);
2517
2518 if (Arguments::created_by_gamma_launcher()) {
2519 // Support for the gamma launcher. Typical value for buf is
2520 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at
2521 // the right place in the string, then assume we are installed in a JDK and
2522 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix
2523 // up the path so it looks like libjvm.so is installed there (append a
2524 // fake suffix hotspot/libjvm.so).
2525 const char *p = buf + strlen(buf) - 1;
2526 for (int count = 0; p > buf && count < 5; ++count) {
2527 for (--p; p > buf && *p != '/'; --p)
2528 /* empty */ ;
2529 }
2530
2531 if (strncmp(p, "/jre/lib/", 9) != 0) {
2532 // Look for JAVA_HOME in the environment.
2533 char* java_home_var = ::getenv("JAVA_HOME");
2534 if (java_home_var != NULL && java_home_var[0] != 0) {
2535 char cpu_arch[12];
2536 char* jrelib_p;
2537 int len;
2538 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2539 #ifdef _LP64
2540 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2541 if (strcmp(cpu_arch, "sparc") == 0) {
2542 strcat(cpu_arch, "v9");
2543 } else if (strcmp(cpu_arch, "i386") == 0) {
2544 strcpy(cpu_arch, "amd64");
2545 }
2546 #endif
2547 // Check the current module name "libjvm.so" or "libjvm_g.so".
2548 p = strrchr(buf, '/');
2549 assert(strstr(p, "/libjvm") == p, "invalid library name");
2550 p = strstr(p, "_g") ? "_g" : "";
2551
2552 realpath(java_home_var, buf);
2553 // determine if this is a legacy image or modules image
2554 // modules image doesn't have "jre" subdirectory
2555 len = strlen(buf);
2556 jrelib_p = buf + len;
2557 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2558 if (0 != access(buf, F_OK)) {
2559 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2560 }
2561
2562 if (0 == access(buf, F_OK)) {
2563 // Use current module name "libjvm[_g].so" instead of
2564 // "libjvm"debug_only("_g")".so" since for fastdebug version
2565 // we should have "libjvm.so" but debug_only("_g") adds "_g"!
2566 len = strlen(buf);
2567 snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p);
2568 } else {
2569 // Go back to path of .so
2570 realpath((char *)dlinfo.dli_fname, buf);
2571 }
2572 }
2573 }
2574 }
2575
2576 strcpy(saved_jvm_path, buf);
2577 }
2578
2579
2580 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2581 // no prefix required, not even "_"
2582 }
2583
2584
2585 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2586 // no suffix required
2587 }
2588
2589 // This method is a copy of JDK's sysGetLastErrorString
2590 // from src/solaris/hpi/src/system_md.c
2591
2592 size_t os::lasterror(char *buf, size_t len) {
2593
2594 if (errno == 0) return 0;
2595
2596 const char *s = ::strerror(errno);
2597 size_t n = ::strlen(s);
2598 if (n >= len) {
2599 n = len - 1;
2600 }
2601 ::strncpy(buf, s, n);
2602 buf[n] = '\0';
2603 return n;
2604 }
2605
2606
2607 // sun.misc.Signal
2608
2609 extern "C" {
2610 static void UserHandler(int sig, void *siginfo, void *context) {
2611 // Ctrl-C is pressed during error reporting, likely because the error
2612 // handler fails to abort. Let VM die immediately.
2613 if (sig == SIGINT && is_error_reported()) {
2614 os::die();
2615 }
2616
2617 os::signal_notify(sig);
2618 // We do not need to reinstate the signal handler each time...
2619 }
2620 }
2621
2622 void* os::user_handler() {
2623 return CAST_FROM_FN_PTR(void*, UserHandler);
2624 }
2625
2626 extern "C" {
2627 typedef void (*sa_handler_t)(int);
2628 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2629 }
2630
2631 void* os::signal(int signal_number, void* handler) {
2632 struct sigaction sigAct, oldSigAct;
2633 sigfillset(&(sigAct.sa_mask));
2634 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2635 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2636
2637 if (sigaction(signal_number, &sigAct, &oldSigAct))
2638 // -1 means registration failed
2639 return (void *)-1;
2640
2641 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2642 }
2643
2644 void os::signal_raise(int signal_number) {
2645 raise(signal_number);
2646 }
2647
2648 /*
2649 * The following code is moved from os.cpp for making this
2650 * code platform specific, which it is by its very nature.
2651 */
2652
2653 // a counter for each possible signal value
2654 static int Sigexit = 0;
2655 static int Maxlibjsigsigs;
2656 static jint *pending_signals = NULL;
2657 static int *preinstalled_sigs = NULL;
2658 static struct sigaction *chainedsigactions = NULL;
2659 static sema_t sig_sem;
2660 typedef int (*version_getting_t)();
2661 version_getting_t os::Solaris::get_libjsig_version = NULL;
2662 static int libjsigversion = NULL;
2663
2664 int os::sigexitnum_pd() {
2665 assert(Sigexit > 0, "signal memory not yet initialized");
2666 return Sigexit;
2667 }
2668
2669 void os::Solaris::init_signal_mem() {
2670 // Initialize signal structures
2671 Maxsignum = SIGRTMAX;
2672 Sigexit = Maxsignum+1;
2673 assert(Maxsignum >0, "Unable to obtain max signal number");
2674
2675 Maxlibjsigsigs = Maxsignum;
2676
2677 // pending_signals has one int per signal
2678 // The additional signal is for SIGEXIT - exit signal to signal_thread
2679 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1));
2680 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2681
2682 if (UseSignalChaining) {
2683 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2684 * (Maxsignum + 1));
2685 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2686 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1));
2687 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2688 }
2689 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ));
2690 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2691 }
2692
2693 void os::signal_init_pd() {
2694 int ret;
2695
2696 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2697 assert(ret == 0, "sema_init() failed");
2698 }
2699
2700 void os::signal_notify(int signal_number) {
2701 int ret;
2702
2703 Atomic::inc(&pending_signals[signal_number]);
2704 ret = ::sema_post(&sig_sem);
2705 assert(ret == 0, "sema_post() failed");
2706 }
2707
2708 static int check_pending_signals(bool wait_for_signal) {
2709 int ret;
2710 while (true) {
2711 for (int i = 0; i < Sigexit + 1; i++) {
2712 jint n = pending_signals[i];
2713 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2714 return i;
2715 }
2716 }
2717 if (!wait_for_signal) {
2718 return -1;
2719 }
2720 JavaThread *thread = JavaThread::current();
2721 ThreadBlockInVM tbivm(thread);
2722
2723 bool threadIsSuspended;
2724 do {
2725 thread->set_suspend_equivalent();
2726 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2727 while((ret = ::sema_wait(&sig_sem)) == EINTR)
2728 ;
2729 assert(ret == 0, "sema_wait() failed");
2730
2731 // were we externally suspended while we were waiting?
2732 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2733 if (threadIsSuspended) {
2734 //
2735 // The semaphore has been incremented, but while we were waiting
2736 // another thread suspended us. We don't want to continue running
2737 // while suspended because that would surprise the thread that
2738 // suspended us.
2739 //
2740 ret = ::sema_post(&sig_sem);
2741 assert(ret == 0, "sema_post() failed");
2742
2743 thread->java_suspend_self();
2744 }
2745 } while (threadIsSuspended);
2746 }
2747 }
2748
2749 int os::signal_lookup() {
2750 return check_pending_signals(false);
2751 }
2752
2753 int os::signal_wait() {
2754 return check_pending_signals(true);
2755 }
2756
2757 ////////////////////////////////////////////////////////////////////////////////
2758 // Virtual Memory
2759
2760 static int page_size = -1;
2761
2762 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2763 // clear this var if support is not available.
2764 static bool has_map_align = true;
2765
2766 int os::vm_page_size() {
2767 assert(page_size != -1, "must call os::init");
2768 return page_size;
2769 }
2770
2771 // Solaris allocates memory by pages.
2772 int os::vm_allocation_granularity() {
2773 assert(page_size != -1, "must call os::init");
2774 return page_size;
2775 }
2776
2777 bool os::commit_memory(char* addr, size_t bytes, bool exec) {
2778 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2779 size_t size = bytes;
2780 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2781 if (UseNUMAInterleaving) {
2782 numa_make_global(addr, bytes);
2783 }
2784 return res != NULL;
2785 }
2786
2787 bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2788 bool exec) {
2789 if (commit_memory(addr, bytes, exec)) {
2790 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) {
2791 // If the large page size has been set and the VM
2792 // is using large pages, use the large page size
2793 // if it is smaller than the alignment hint. This is
2794 // a case where the VM wants to use a larger alignment size
2795 // for its own reasons but still want to use large pages
2796 // (which is what matters to setting the mpss range.
2797 size_t page_size = 0;
2798 if (large_page_size() < alignment_hint) {
2799 assert(UseLargePages, "Expected to be here for large page use only");
2800 page_size = large_page_size();
2801 } else {
2802 // If the alignment hint is less than the large page
2803 // size, the VM wants a particular alignment (thus the hint)
2804 // for internal reasons. Try to set the mpss range using
2805 // the alignment_hint.
2806 page_size = alignment_hint;
2807 }
2808 // Since this is a hint, ignore any failures.
2809 (void)Solaris::set_mpss_range(addr, bytes, page_size);
2810 }
2811 return true;
2812 }
2813 return false;
2814 }
2815
2816 // Uncommit the pages in a specified region.
2817 void os::free_memory(char* addr, size_t bytes) {
2818 if (madvise(addr, bytes, MADV_FREE) < 0) {
2819 debug_only(warning("MADV_FREE failed."));
2820 return;
2821 }
2822 }
2823
2824 bool os::create_stack_guard_pages(char* addr, size_t size) {
2825 return os::commit_memory(addr, size);
2826 }
2827
2828 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2829 return os::uncommit_memory(addr, size);
2830 }
2831
2832 // Change the page size in a given range.
2833 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2834 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2835 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2836 if (UseLargePages && UseMPSS) {
2837 Solaris::set_mpss_range(addr, bytes, alignment_hint);
2838 }
2839 }
2840
2841 // Tell the OS to make the range local to the first-touching LWP
2842 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2843 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2844 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2845 debug_only(warning("MADV_ACCESS_LWP failed."));
2846 }
2847 }
2848
2849 // Tell the OS that this range would be accessed from different LWPs.
2850 void os::numa_make_global(char *addr, size_t bytes) {
2851 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2852 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2853 debug_only(warning("MADV_ACCESS_MANY failed."));
2854 }
2855 }
2856
2857 // Get the number of the locality groups.
2858 size_t os::numa_get_groups_num() {
2859 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2860 return n != -1 ? n : 1;
2861 }
2862
2863 // Get a list of leaf locality groups. A leaf lgroup is group that
2864 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2865 // board. An LWP is assigned to one of these groups upon creation.
2866 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2867 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2868 ids[0] = 0;
2869 return 1;
2870 }
2871 int result_size = 0, top = 1, bottom = 0, cur = 0;
2872 for (int k = 0; k < size; k++) {
2873 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2874 (Solaris::lgrp_id_t*)&ids[top], size - top);
2875 if (r == -1) {
2876 ids[0] = 0;
2877 return 1;
2878 }
2879 if (!r) {
2880 // That's a leaf node.
2881 assert (bottom <= cur, "Sanity check");
2882 // Check if the node has memory
2883 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2884 NULL, 0, LGRP_RSRC_MEM) > 0) {
2885 ids[bottom++] = ids[cur];
2886 }
2887 }
2888 top += r;
2889 cur++;
2890 }
2891 if (bottom == 0) {
2892 // Handle a situation, when the OS reports no memory available.
2893 // Assume UMA architecture.
2894 ids[0] = 0;
2895 return 1;
2896 }
2897 return bottom;
2898 }
2899
2900 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2901 bool os::numa_topology_changed() {
2902 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2903 if (is_stale != -1 && is_stale) {
2904 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2905 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2906 assert(c != 0, "Failure to initialize LGRP API");
2907 Solaris::set_lgrp_cookie(c);
2908 return true;
2909 }
2910 return false;
2911 }
2912
2913 // Get the group id of the current LWP.
2914 int os::numa_get_group_id() {
2915 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2916 if (lgrp_id == -1) {
2917 return 0;
2918 }
2919 const int size = os::numa_get_groups_num();
2920 int *ids = (int*)alloca(size * sizeof(int));
2921
2922 // Get the ids of all lgroups with memory; r is the count.
2923 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2924 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2925 if (r <= 0) {
2926 return 0;
2927 }
2928 return ids[os::random() % r];
2929 }
2930
2931 // Request information about the page.
2932 bool os::get_page_info(char *start, page_info* info) {
2933 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2934 uint64_t addr = (uintptr_t)start;
2935 uint64_t outdata[2];
2936 uint_t validity = 0;
2937
2938 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2939 return false;
2940 }
2941
2942 info->size = 0;
2943 info->lgrp_id = -1;
2944
2945 if ((validity & 1) != 0) {
2946 if ((validity & 2) != 0) {
2947 info->lgrp_id = outdata[0];
2948 }
2949 if ((validity & 4) != 0) {
2950 info->size = outdata[1];
2951 }
2952 return true;
2953 }
2954 return false;
2955 }
2956
2957 // Scan the pages from start to end until a page different than
2958 // the one described in the info parameter is encountered.
2959 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
2960 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2961 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2962 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT];
2963 uint_t validity[MAX_MEMINFO_CNT];
2964
2965 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2966 uint64_t p = (uint64_t)start;
2967 while (p < (uint64_t)end) {
2968 addrs[0] = p;
2969 size_t addrs_count = 1;
2970 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) {
2971 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2972 addrs_count++;
2973 }
2974
2975 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2976 return NULL;
2977 }
2978
2979 size_t i = 0;
2980 for (; i < addrs_count; i++) {
2981 if ((validity[i] & 1) != 0) {
2982 if ((validity[i] & 4) != 0) {
2983 if (outdata[types * i + 1] != page_expected->size) {
2984 break;
2985 }
2986 } else
2987 if (page_expected->size != 0) {
2988 break;
2989 }
2990
2991 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2992 if (outdata[types * i] != page_expected->lgrp_id) {
2993 break;
2994 }
2995 }
2996 } else {
2997 return NULL;
2998 }
2999 }
3000
3001 if (i != addrs_count) {
3002 if ((validity[i] & 2) != 0) {
3003 page_found->lgrp_id = outdata[types * i];
3004 } else {
3005 page_found->lgrp_id = -1;
3006 }
3007 if ((validity[i] & 4) != 0) {
3008 page_found->size = outdata[types * i + 1];
3009 } else {
3010 page_found->size = 0;
3011 }
3012 return (char*)addrs[i];
3013 }
3014
3015 p = addrs[addrs_count - 1] + page_size;
3016 }
3017 return end;
3018 }
3019
3020 bool os::uncommit_memory(char* addr, size_t bytes) {
3021 size_t size = bytes;
3022 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3023 // uncommitted page. Otherwise, the read/write might succeed if we
3024 // have enough swap space to back the physical page.
3025 return
3026 NULL != Solaris::mmap_chunk(addr, size,
3027 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
3028 PROT_NONE);
3029 }
3030
3031 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
3032 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
3033
3034 if (b == MAP_FAILED) {
3035 return NULL;
3036 }
3037 return b;
3038 }
3039
3040 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) {
3041 char* addr = requested_addr;
3042 int flags = MAP_PRIVATE | MAP_NORESERVE;
3043
3044 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap");
3045
3046 if (fixed) {
3047 flags |= MAP_FIXED;
3048 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
3049 flags |= MAP_ALIGN;
3050 addr = (char*) alignment_hint;
3051 }
3052
3053 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3054 // uncommitted page. Otherwise, the read/write might succeed if we
3055 // have enough swap space to back the physical page.
3056 return mmap_chunk(addr, bytes, flags, PROT_NONE);
3057 }
3058
3059 char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
3060 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL));
3061
3062 guarantee(requested_addr == NULL || requested_addr == addr,
3063 "OS failed to return requested mmap address.");
3064 return addr;
3065 }
3066
3067 // Reserve memory at an arbitrary address, only if that area is
3068 // available (and not reserved for something else).
3069
3070 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
3071 const int max_tries = 10;
3072 char* base[max_tries];
3073 size_t size[max_tries];
3074
3075 // Solaris adds a gap between mmap'ed regions. The size of the gap
3076 // is dependent on the requested size and the MMU. Our initial gap
3077 // value here is just a guess and will be corrected later.
3078 bool had_top_overlap = false;
3079 bool have_adjusted_gap = false;
3080 size_t gap = 0x400000;
3081
3082 // Assert only that the size is a multiple of the page size, since
3083 // that's all that mmap requires, and since that's all we really know
3084 // about at this low abstraction level. If we need higher alignment,
3085 // we can either pass an alignment to this method or verify alignment
3086 // in one of the methods further up the call chain. See bug 5044738.
3087 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
3088
3089 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
3090 // Give it a try, if the kernel honors the hint we can return immediately.
3091 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
3092 volatile int err = errno;
3093 if (addr == requested_addr) {
3094 return addr;
3095 } else if (addr != NULL) {
3096 unmap_memory(addr, bytes);
3097 }
3098
3099 if (PrintMiscellaneous && Verbose) {
3100 char buf[256];
3101 buf[0] = '\0';
3102 if (addr == NULL) {
3103 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
3104 }
3105 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
3106 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
3107 "%s", bytes, requested_addr, addr, buf);
3108 }
3109
3110 // Address hint method didn't work. Fall back to the old method.
3111 // In theory, once SNV becomes our oldest supported platform, this
3112 // code will no longer be needed.
3113 //
3114 // Repeatedly allocate blocks until the block is allocated at the
3115 // right spot. Give up after max_tries.
3116 int i;
3117 for (i = 0; i < max_tries; ++i) {
3118 base[i] = reserve_memory(bytes);
3119
3120 if (base[i] != NULL) {
3121 // Is this the block we wanted?
3122 if (base[i] == requested_addr) {
3123 size[i] = bytes;
3124 break;
3125 }
3126
3127 // check that the gap value is right
3128 if (had_top_overlap && !have_adjusted_gap) {
3129 size_t actual_gap = base[i-1] - base[i] - bytes;
3130 if (gap != actual_gap) {
3131 // adjust the gap value and retry the last 2 allocations
3132 assert(i > 0, "gap adjustment code problem");
3133 have_adjusted_gap = true; // adjust the gap only once, just in case
3134 gap = actual_gap;
3135 if (PrintMiscellaneous && Verbose) {
3136 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
3137 }
3138 unmap_memory(base[i], bytes);
3139 unmap_memory(base[i-1], size[i-1]);
3140 i-=2;
3141 continue;
3142 }
3143 }
3144
3145 // Does this overlap the block we wanted? Give back the overlapped
3146 // parts and try again.
3147 //
3148 // There is still a bug in this code: if top_overlap == bytes,
3149 // the overlap is offset from requested region by the value of gap.
3150 // In this case giving back the overlapped part will not work,
3151 // because we'll give back the entire block at base[i] and
3152 // therefore the subsequent allocation will not generate a new gap.
3153 // This could be fixed with a new algorithm that used larger
3154 // or variable size chunks to find the requested region -
3155 // but such a change would introduce additional complications.
3156 // It's rare enough that the planets align for this bug,
3157 // so we'll just wait for a fix for 6204603/5003415 which
3158 // will provide a mmap flag to allow us to avoid this business.
3159
3160 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
3161 if (top_overlap >= 0 && top_overlap < bytes) {
3162 had_top_overlap = true;
3163 unmap_memory(base[i], top_overlap);
3164 base[i] += top_overlap;
3165 size[i] = bytes - top_overlap;
3166 } else {
3167 size_t bottom_overlap = base[i] + bytes - requested_addr;
3168 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
3169 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
3170 warning("attempt_reserve_memory_at: possible alignment bug");
3171 }
3172 unmap_memory(requested_addr, bottom_overlap);
3173 size[i] = bytes - bottom_overlap;
3174 } else {
3175 size[i] = bytes;
3176 }
3177 }
3178 }
3179 }
3180
3181 // Give back the unused reserved pieces.
3182
3183 for (int j = 0; j < i; ++j) {
3184 if (base[j] != NULL) {
3185 unmap_memory(base[j], size[j]);
3186 }
3187 }
3188
3189 return (i < max_tries) ? requested_addr : NULL;
3190 }
3191
3192 bool os::release_memory(char* addr, size_t bytes) {
3193 size_t size = bytes;
3194 return munmap(addr, size) == 0;
3195 }
3196
3197 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
3198 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
3199 "addr must be page aligned");
3200 int retVal = mprotect(addr, bytes, prot);
3201 return retVal == 0;
3202 }
3203
3204 // Protect memory (Used to pass readonly pages through
3205 // JNI GetArray<type>Elements with empty arrays.)
3206 // Also, used for serialization page and for compressed oops null pointer
3207 // checking.
3208 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3209 bool is_committed) {
3210 unsigned int p = 0;
3211 switch (prot) {
3212 case MEM_PROT_NONE: p = PROT_NONE; break;
3213 case MEM_PROT_READ: p = PROT_READ; break;
3214 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3215 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3216 default:
3217 ShouldNotReachHere();
3218 }
3219 // is_committed is unused.
3220 return solaris_mprotect(addr, bytes, p);
3221 }
3222
3223 // guard_memory and unguard_memory only happens within stack guard pages.
3224 // Since ISM pertains only to the heap, guard and unguard memory should not
3225 /// happen with an ISM region.
3226 bool os::guard_memory(char* addr, size_t bytes) {
3227 return solaris_mprotect(addr, bytes, PROT_NONE);
3228 }
3229
3230 bool os::unguard_memory(char* addr, size_t bytes) {
3231 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3232 }
3233
3234 // Large page support
3235
3236 // UseLargePages is the master flag to enable/disable large page memory.
3237 // UseMPSS and UseISM are supported for compatibility reasons. Their combined
3238 // effects can be described in the following table:
3239 //
3240 // UseLargePages UseMPSS UseISM
3241 // false * * => UseLargePages is the master switch, turning
3242 // it off will turn off both UseMPSS and
3243 // UseISM. VM will not use large page memory
3244 // regardless the settings of UseMPSS/UseISM.
3245 // true false false => Unless future Solaris provides other
3246 // mechanism to use large page memory, this
3247 // combination is equivalent to -UseLargePages,
3248 // VM will not use large page memory
3249 // true true false => JVM will use MPSS for large page memory.
3250 // This is the default behavior.
3251 // true false true => JVM will use ISM for large page memory.
3252 // true true true => JVM will use ISM if it is available.
3253 // Otherwise, JVM will fall back to MPSS.
3254 // Becaues ISM is now available on all
3255 // supported Solaris versions, this combination
3256 // is equivalent to +UseISM -UseMPSS.
3257
3258 static size_t _large_page_size = 0;
3259
3260 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) {
3261 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address
3262 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc
3263 // can support multiple page sizes.
3264
3265 // Don't bother to probe page size because getpagesizes() comes with MPSS.
3266 // ISM is only recommended on old Solaris where there is no MPSS support.
3267 // Simply choose a conservative value as default.
3268 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes :
3269 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M)
3270 ARM_ONLY(2 * M);
3271
3272 // ISM is available on all supported Solaris versions
3273 return true;
3274 }
3275
3276 // Insertion sort for small arrays (descending order).
3277 static void insertion_sort_descending(size_t* array, int len) {
3278 for (int i = 0; i < len; i++) {
3279 size_t val = array[i];
3280 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3281 size_t tmp = array[key];
3282 array[key] = array[key - 1];
3283 array[key - 1] = tmp;
3284 }
3285 }
3286 }
3287
3288 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
3289 const unsigned int usable_count = VM_Version::page_size_count();
3290 if (usable_count == 1) {
3291 return false;
3292 }
3293
3294 // Find the right getpagesizes interface. When solaris 11 is the minimum
3295 // build platform, getpagesizes() (without the '2') can be called directly.
3296 typedef int (*gps_t)(size_t[], int);
3297 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3298 if (gps_func == NULL) {
3299 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3300 if (gps_func == NULL) {
3301 if (warn) {
3302 warning("MPSS is not supported by the operating system.");
3303 }
3304 return false;
3305 }
3306 }
3307
3308 // Fill the array of page sizes.
3309 int n = (*gps_func)(_page_sizes, page_sizes_max);
3310 assert(n > 0, "Solaris bug?");
3311
3312 if (n == page_sizes_max) {
3313 // Add a sentinel value (necessary only if the array was completely filled
3314 // since it is static (zeroed at initialization)).
3315 _page_sizes[--n] = 0;
3316 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3317 }
3318 assert(_page_sizes[n] == 0, "missing sentinel");
3319 trace_page_sizes("available page sizes", _page_sizes, n);
3320
3321 if (n == 1) return false; // Only one page size available.
3322
3323 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3324 // select up to usable_count elements. First sort the array, find the first
3325 // acceptable value, then copy the usable sizes to the top of the array and
3326 // trim the rest. Make sure to include the default page size :-).
3327 //
3328 // A better policy could get rid of the 4M limit by taking the sizes of the
3329 // important VM memory regions (java heap and possibly the code cache) into
3330 // account.
3331 insertion_sort_descending(_page_sizes, n);
3332 const size_t size_limit =
3333 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3334 int beg;
3335 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
3336 const int end = MIN2((int)usable_count, n) - 1;
3337 for (int cur = 0; cur < end; ++cur, ++beg) {
3338 _page_sizes[cur] = _page_sizes[beg];
3339 }
3340 _page_sizes[end] = vm_page_size();
3341 _page_sizes[end + 1] = 0;
3342
3343 if (_page_sizes[end] > _page_sizes[end - 1]) {
3344 // Default page size is not the smallest; sort again.
3345 insertion_sort_descending(_page_sizes, end + 1);
3346 }
3347 *page_size = _page_sizes[0];
3348
3349 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3350 return true;
3351 }
3352
3353 void os::large_page_init() {
3354 if (!UseLargePages) {
3355 UseISM = false;
3356 UseMPSS = false;
3357 return;
3358 }
3359
3360 // print a warning if any large page related flag is specified on command line
3361 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3362 !FLAG_IS_DEFAULT(UseISM) ||
3363 !FLAG_IS_DEFAULT(UseMPSS) ||
3364 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3365 UseISM = UseISM &&
3366 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size);
3367 if (UseISM) {
3368 // ISM disables MPSS to be compatible with old JDK behavior
3369 UseMPSS = false;
3370 _page_sizes[0] = _large_page_size;
3371 _page_sizes[1] = vm_page_size();
3372 }
3373
3374 UseMPSS = UseMPSS &&
3375 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3376
3377 UseLargePages = UseISM || UseMPSS;
3378 }
3379
3380 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) {
3381 // Signal to OS that we want large pages for addresses
3382 // from addr, addr + bytes
3383 struct memcntl_mha mpss_struct;
3384 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3385 mpss_struct.mha_pagesize = align;
3386 mpss_struct.mha_flags = 0;
3387 if (memcntl(start, bytes, MC_HAT_ADVISE,
3388 (caddr_t) &mpss_struct, 0, 0) < 0) {
3389 debug_only(warning("Attempt to use MPSS failed."));
3390 return false;
3391 }
3392 return true;
3393 }
3394
3395 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) {
3396 // "exec" is passed in but not used. Creating the shared image for
3397 // the code cache doesn't have an SHM_X executable permission to check.
3398 assert(UseLargePages && UseISM, "only for ISM large pages");
3399
3400 size_t size = bytes;
3401 char* retAddr = NULL;
3402 int shmid;
3403 key_t ismKey;
3404
3405 bool warn_on_failure = UseISM &&
3406 (!FLAG_IS_DEFAULT(UseLargePages) ||
3407 !FLAG_IS_DEFAULT(UseISM) ||
3408 !FLAG_IS_DEFAULT(LargePageSizeInBytes)
3409 );
3410 char msg[128];
3411
3412 ismKey = IPC_PRIVATE;
3413
3414 // Create a large shared memory region to attach to based on size.
3415 // Currently, size is the total size of the heap
3416 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT);
3417 if (shmid == -1){
3418 if (warn_on_failure) {
3419 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
3420 warning(msg);
3421 }
3422 return NULL;
3423 }
3424
3425 // Attach to the region
3426 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W);
3427 int err = errno;
3428
3429 // Remove shmid. If shmat() is successful, the actual shared memory segment
3430 // will be deleted when it's detached by shmdt() or when the process
3431 // terminates. If shmat() is not successful this will remove the shared
3432 // segment immediately.
3433 shmctl(shmid, IPC_RMID, NULL);
3434
3435 if (retAddr == (char *) -1) {
3436 if (warn_on_failure) {
3437 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
3438 warning(msg);
3439 }
3440 return NULL;
3441 }
3442
3443 if (UseNUMAInterleaving) {
3444 numa_make_global(retAddr, bytes);
3445 }
3446 return retAddr;
3447 }
3448
3449 bool os::release_memory_special(char* base, size_t bytes) {
3450 // detaching the SHM segment will also delete it, see reserve_memory_special()
3451 int rslt = shmdt(base);
3452 return rslt == 0;
3453 }
3454
3455 size_t os::large_page_size() {
3456 return _large_page_size;
3457 }
3458
3459 // MPSS allows application to commit large page memory on demand; with ISM
3460 // the entire memory region must be allocated as shared memory.
3461 bool os::can_commit_large_page_memory() {
3462 return UseISM ? false : true;
3463 }
3464
3465 bool os::can_execute_large_page_memory() {
3466 return UseISM ? false : true;
3467 }
3468
3469 static int os_sleep(jlong millis, bool interruptible) {
3470 const jlong limit = INT_MAX;
3471 jlong prevtime;
3472 int res;
3473
3474 while (millis > limit) {
3475 if ((res = os_sleep(limit, interruptible)) != OS_OK)
3476 return res;
3477 millis -= limit;
3478 }
3479
3480 // Restart interrupted polls with new parameters until the proper delay
3481 // has been completed.
3482
3483 prevtime = getTimeMillis();
3484
3485 while (millis > 0) {
3486 jlong newtime;
3487
3488 if (!interruptible) {
3489 // Following assert fails for os::yield_all:
3490 // assert(!thread->is_Java_thread(), "must not be java thread");
3491 res = poll(NULL, 0, millis);
3492 } else {
3493 JavaThread *jt = JavaThread::current();
3494
3495 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt,
3496 os::Solaris::clear_interrupted);
3497 }
3498
3499 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for
3500 // thread.Interrupt.
3501
3502 // See c/r 6751923. Poll can return 0 before time
3503 // has elapsed if time is set via clock_settime (as NTP does).
3504 // res == 0 if poll timed out (see man poll RETURN VALUES)
3505 // using the logic below checks that we really did
3506 // sleep at least "millis" if not we'll sleep again.
3507 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) {
3508 newtime = getTimeMillis();
3509 assert(newtime >= prevtime, "time moving backwards");
3510 /* Doing prevtime and newtime in microseconds doesn't help precision,
3511 and trying to round up to avoid lost milliseconds can result in a
3512 too-short delay. */
3513 millis -= newtime - prevtime;
3514 if(millis <= 0)
3515 return OS_OK;
3516 prevtime = newtime;
3517 } else
3518 return res;
3519 }
3520
3521 return OS_OK;
3522 }
3523
3524 // Read calls from inside the vm need to perform state transitions
3525 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3526 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3527 }
3528
3529 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3530 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3531 }
3532
3533 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
3534 assert(thread == Thread::current(), "thread consistency check");
3535
3536 // TODO-FIXME: this should be removed.
3537 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock
3538 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate
3539 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving
3540 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel
3541 // is fooled into believing that the system is making progress. In the code below we block the
3542 // the watcher thread while safepoint is in progress so that it would not appear as though the
3543 // system is making progress.
3544 if (!Solaris::T2_libthread() &&
3545 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) {
3546 // We now try to acquire the threads lock. Since this lock is held by the VM thread during
3547 // the entire safepoint, the watcher thread will line up here during the safepoint.
3548 Threads_lock->lock_without_safepoint_check();
3549 Threads_lock->unlock();
3550 }
3551
3552 if (thread->is_Java_thread()) {
3553 // This is a JavaThread so we honor the _thread_blocked protocol
3554 // even for sleeps of 0 milliseconds. This was originally done
3555 // as a workaround for bug 4338139. However, now we also do it
3556 // to honor the suspend-equivalent protocol.
3557
3558 JavaThread *jt = (JavaThread *) thread;
3559 ThreadBlockInVM tbivm(jt);
3560
3561 jt->set_suspend_equivalent();
3562 // cleared by handle_special_suspend_equivalent_condition() or
3563 // java_suspend_self() via check_and_wait_while_suspended()
3564
3565 int ret_code;
3566 if (millis <= 0) {
3567 thr_yield();
3568 ret_code = 0;
3569 } else {
3570 // The original sleep() implementation did not create an
3571 // OSThreadWaitState helper for sleeps of 0 milliseconds.
3572 // I'm preserving that decision for now.
3573 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
3574
3575 ret_code = os_sleep(millis, interruptible);
3576 }
3577
3578 // were we externally suspended while we were waiting?
3579 jt->check_and_wait_while_suspended();
3580
3581 return ret_code;
3582 }
3583
3584 // non-JavaThread from this point on:
3585
3586 if (millis <= 0) {
3587 thr_yield();
3588 return 0;
3589 }
3590
3591 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
3592
3593 return os_sleep(millis, interruptible);
3594 }
3595
3596 int os::naked_sleep() {
3597 // %% make the sleep time an integer flag. for now use 1 millisec.
3598 return os_sleep(1, false);
3599 }
3600
3601 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3602 void os::infinite_sleep() {
3603 while (true) { // sleep forever ...
3604 ::sleep(100); // ... 100 seconds at a time
3605 }
3606 }
3607
3608 // Used to convert frequent JVM_Yield() to nops
3609 bool os::dont_yield() {
3610 if (DontYieldALot) {
3611 static hrtime_t last_time = 0;
3612 hrtime_t diff = getTimeNanos() - last_time;
3613
3614 if (diff < DontYieldALotInterval * 1000000)
3615 return true;
3616
3617 last_time += diff;
3618
3619 return false;
3620 }
3621 else {
3622 return false;
3623 }
3624 }
3625
3626 // Caveat: Solaris os::yield() causes a thread-state transition whereas
3627 // the linux and win32 implementations do not. This should be checked.
3628
3629 void os::yield() {
3630 // Yields to all threads with same or greater priority
3631 os::sleep(Thread::current(), 0, false);
3632 }
3633
3634 // Note that yield semantics are defined by the scheduling class to which
3635 // the thread currently belongs. Typically, yield will _not yield to
3636 // other equal or higher priority threads that reside on the dispatch queues
3637 // of other CPUs.
3638
3639 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
3640
3641
3642 // On Solaris we found that yield_all doesn't always yield to all other threads.
3643 // There have been cases where there is a thread ready to execute but it doesn't
3644 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
3645 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a
3646 // SIGWAITING signal which will cause a new lwp to be created. So we count the
3647 // number of times yield_all is called in the one loop and increase the sleep
3648 // time after 8 attempts. If this fails too we increase the concurrency level
3649 // so that the starving thread would get an lwp
3650
3651 void os::yield_all(int attempts) {
3652 // Yields to all threads, including threads with lower priorities
3653 if (attempts == 0) {
3654 os::sleep(Thread::current(), 1, false);
3655 } else {
3656 int iterations = attempts % 30;
3657 if (iterations == 0 && !os::Solaris::T2_libthread()) {
3658 // thr_setconcurrency and _getconcurrency make sense only under T1.
3659 int noofLWPS = thr_getconcurrency();
3660 if (noofLWPS < (Threads::number_of_threads() + 2)) {
3661 thr_setconcurrency(thr_getconcurrency() + 1);
3662 }
3663 } else if (iterations < 25) {
3664 os::sleep(Thread::current(), 1, false);
3665 } else {
3666 os::sleep(Thread::current(), 10, false);
3667 }
3668 }
3669 }
3670
3671 // Called from the tight loops to possibly influence time-sharing heuristics
3672 void os::loop_breaker(int attempts) {
3673 os::yield_all(attempts);
3674 }
3675
3676
3677 // Interface for setting lwp priorities. If we are using T2 libthread,
3678 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3679 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3680 // function is meaningless in this mode so we must adjust the real lwp's priority
3681 // The routines below implement the getting and setting of lwp priorities.
3682 //
3683 // Note: There are three priority scales used on Solaris. Java priotities
3684 // which range from 1 to 10, libthread "thr_setprio" scale which range
3685 // from 0 to 127, and the current scheduling class of the process we
3686 // are running in. This is typically from -60 to +60.
3687 // The setting of the lwp priorities in done after a call to thr_setprio
3688 // so Java priorities are mapped to libthread priorities and we map from
3689 // the latter to lwp priorities. We don't keep priorities stored in
3690 // Java priorities since some of our worker threads want to set priorities
3691 // higher than all Java threads.
3692 //
3693 // For related information:
3694 // (1) man -s 2 priocntl
3695 // (2) man -s 4 priocntl
3696 // (3) man dispadmin
3697 // = librt.so
3698 // = libthread/common/rtsched.c - thrp_setlwpprio().
3699 // = ps -cL <pid> ... to validate priority.
3700 // = sched_get_priority_min and _max
3701 // pthread_create
3702 // sched_setparam
3703 // pthread_setschedparam
3704 //
3705 // Assumptions:
3706 // + We assume that all threads in the process belong to the same
3707 // scheduling class. IE. an homogenous process.
3708 // + Must be root or in IA group to change change "interactive" attribute.
3709 // Priocntl() will fail silently. The only indication of failure is when
3710 // we read-back the value and notice that it hasn't changed.
3711 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3712 // + For RT, change timeslice as well. Invariant:
3713 // constant "priority integral"
3714 // Konst == TimeSlice * (60-Priority)
3715 // Given a priority, compute appropriate timeslice.
3716 // + Higher numerical values have higher priority.
3717
3718 // sched class attributes
3719 typedef struct {
3720 int schedPolicy; // classID
3721 int maxPrio;
3722 int minPrio;
3723 } SchedInfo;
3724
3725
3726 static SchedInfo tsLimits, iaLimits, rtLimits;
3727
3728 #ifdef ASSERT
3729 static int ReadBackValidate = 1;
3730 #endif
3731 static int myClass = 0;
3732 static int myMin = 0;
3733 static int myMax = 0;
3734 static int myCur = 0;
3735 static bool priocntl_enable = false;
3736
3737
3738 // Call the version of priocntl suitable for all supported versions
3739 // of Solaris. We need to call through this wrapper so that we can
3740 // build on Solaris 9 and run on Solaris 8, 9 and 10.
3741 //
3742 // This code should be removed if we ever stop supporting Solaris 8
3743 // and earlier releases.
3744
3745 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3746 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3747 static priocntl_type priocntl_ptr = priocntl_stub;
3748
3749 // Stub to set the value of the real pointer, and then call the real
3750 // function.
3751
3752 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) {
3753 // Try Solaris 8- name only.
3754 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl");
3755 guarantee(tmp != NULL, "priocntl function not found.");
3756 priocntl_ptr = tmp;
3757 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg);
3758 }
3759
3760
3761 // lwp_priocntl_init
3762 //
3763 // Try to determine the priority scale for our process.
3764 //
3765 // Return errno or 0 if OK.
3766 //
3767 static
3768 int lwp_priocntl_init ()
3769 {
3770 int rslt;
3771 pcinfo_t ClassInfo;
3772 pcparms_t ParmInfo;
3773 int i;
3774
3775 if (!UseThreadPriorities) return 0;
3776
3777 // We are using Bound threads, we need to determine our priority ranges
3778 if (os::Solaris::T2_libthread() || UseBoundThreads) {
3779 // If ThreadPriorityPolicy is 1, switch tables
3780 if (ThreadPriorityPolicy == 1) {
3781 for (i = 0 ; i < MaxPriority+1; i++)
3782 os::java_to_os_priority[i] = prio_policy1[i];
3783 }
3784 }
3785 // Not using Bound Threads, set to ThreadPolicy 1
3786 else {
3787 for ( i = 0 ; i < MaxPriority+1; i++ ) {
3788 os::java_to_os_priority[i] = prio_policy1[i];
3789 }
3790 return 0;
3791 }
3792
3793
3794 // Get IDs for a set of well-known scheduling classes.
3795 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3796 // the system. We should have a loop that iterates over the
3797 // classID values, which are known to be "small" integers.
3798
3799 strcpy(ClassInfo.pc_clname, "TS");
3800 ClassInfo.pc_cid = -1;
3801 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3802 if (rslt < 0) return errno;
3803 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3804 tsLimits.schedPolicy = ClassInfo.pc_cid;
3805 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3806 tsLimits.minPrio = -tsLimits.maxPrio;
3807
3808 strcpy(ClassInfo.pc_clname, "IA");
3809 ClassInfo.pc_cid = -1;
3810 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3811 if (rslt < 0) return errno;
3812 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3813 iaLimits.schedPolicy = ClassInfo.pc_cid;
3814 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3815 iaLimits.minPrio = -iaLimits.maxPrio;
3816
3817 strcpy(ClassInfo.pc_clname, "RT");
3818 ClassInfo.pc_cid = -1;
3819 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3820 if (rslt < 0) return errno;
3821 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3822 rtLimits.schedPolicy = ClassInfo.pc_cid;
3823 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3824 rtLimits.minPrio = 0;
3825
3826
3827 // Query our "current" scheduling class.
3828 // This will normally be IA,TS or, rarely, RT.
3829 memset (&ParmInfo, 0, sizeof(ParmInfo));
3830 ParmInfo.pc_cid = PC_CLNULL;
3831 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo );
3832 if ( rslt < 0 ) return errno;
3833 myClass = ParmInfo.pc_cid;
3834
3835 // We now know our scheduling classId, get specific information
3836 // the class.
3837 ClassInfo.pc_cid = myClass;
3838 ClassInfo.pc_clname[0] = 0;
3839 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo );
3840 if ( rslt < 0 ) return errno;
3841
3842 if (ThreadPriorityVerbose)
3843 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3844
3845 memset(&ParmInfo, 0, sizeof(pcparms_t));
3846 ParmInfo.pc_cid = PC_CLNULL;
3847 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3848 if (rslt < 0) return errno;
3849
3850 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3851 myMin = rtLimits.minPrio;
3852 myMax = rtLimits.maxPrio;
3853 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3854 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3855 myMin = iaLimits.minPrio;
3856 myMax = iaLimits.maxPrio;
3857 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3858 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3859 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3860 myMin = tsLimits.minPrio;
3861 myMax = tsLimits.maxPrio;
3862 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3863 } else {
3864 // No clue - punt
3865 if (ThreadPriorityVerbose)
3866 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
3867 return EINVAL; // no clue, punt
3868 }
3869
3870 if (ThreadPriorityVerbose)
3871 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
3872
3873 priocntl_enable = true; // Enable changing priorities
3874 return 0;
3875 }
3876
3877 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3878 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3879 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3880
3881
3882 // scale_to_lwp_priority
3883 //
3884 // Convert from the libthread "thr_setprio" scale to our current
3885 // lwp scheduling class scale.
3886 //
3887 static
3888 int scale_to_lwp_priority (int rMin, int rMax, int x)
3889 {
3890 int v;
3891
3892 if (x == 127) return rMax; // avoid round-down
3893 v = (((x*(rMax-rMin)))/128)+rMin;
3894 return v;
3895 }
3896
3897
3898 // set_lwp_priority
3899 //
3900 // Set the priority of the lwp. This call should only be made
3901 // when using bound threads (T2 threads are bound by default).
3902 //
3903 int set_lwp_priority (int ThreadID, int lwpid, int newPrio )
3904 {
3905 int rslt;
3906 int Actual, Expected, prv;
3907 pcparms_t ParmInfo; // for GET-SET
3908 #ifdef ASSERT
3909 pcparms_t ReadBack; // for readback
3910 #endif
3911
3912 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3913 // Query current values.
3914 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3915 // Cache "pcparms_t" in global ParmCache.
3916 // TODO: elide set-to-same-value
3917
3918 // If something went wrong on init, don't change priorities.
3919 if ( !priocntl_enable ) {
3920 if (ThreadPriorityVerbose)
3921 tty->print_cr("Trying to set priority but init failed, ignoring");
3922 return EINVAL;
3923 }
3924
3925
3926 // If lwp hasn't started yet, just return
3927 // the _start routine will call us again.
3928 if ( lwpid <= 0 ) {
3929 if (ThreadPriorityVerbose) {
3930 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set",
3931 ThreadID, newPrio);
3932 }
3933 return 0;
3934 }
3935
3936 if (ThreadPriorityVerbose) {
3937 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3938 ThreadID, lwpid, newPrio);
3939 }
3940
3941 memset(&ParmInfo, 0, sizeof(pcparms_t));
3942 ParmInfo.pc_cid = PC_CLNULL;
3943 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3944 if (rslt < 0) return errno;
3945
3946 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3947 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3948 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio);
3949 rtInfo->rt_tqsecs = RT_NOCHANGE;
3950 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3951 if (ThreadPriorityVerbose) {
3952 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3953 }
3954 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3955 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3956 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim);
3957 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio);
3958 iaInfo->ia_uprilim = IA_NOCHANGE;
3959 iaInfo->ia_mode = IA_NOCHANGE;
3960 if (ThreadPriorityVerbose) {
3961 tty->print_cr ("IA: [%d...%d] %d->%d\n",
3962 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3963 }
3964 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3965 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3966 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim);
3967 prv = tsInfo->ts_upri;
3968 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio);
3969 tsInfo->ts_uprilim = IA_NOCHANGE;
3970 if (ThreadPriorityVerbose) {
3971 tty->print_cr ("TS: %d [%d...%d] %d->%d\n",
3972 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3973 }
3974 if (prv == tsInfo->ts_upri) return 0;
3975 } else {
3976 if ( ThreadPriorityVerbose ) {
3977 tty->print_cr ("Unknown scheduling class\n");
3978 }
3979 return EINVAL; // no clue, punt
3980 }
3981
3982 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3983 if (ThreadPriorityVerbose && rslt) {
3984 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3985 }
3986 if (rslt < 0) return errno;
3987
3988 #ifdef ASSERT
3989 // Sanity check: read back what we just attempted to set.
3990 // In theory it could have changed in the interim ...
3991 //
3992 // The priocntl system call is tricky.
3993 // Sometimes it'll validate the priority value argument and
3994 // return EINVAL if unhappy. At other times it fails silently.
3995 // Readbacks are prudent.
3996
3997 if (!ReadBackValidate) return 0;
3998
3999 memset(&ReadBack, 0, sizeof(pcparms_t));
4000 ReadBack.pc_cid = PC_CLNULL;
4001 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
4002 assert(rslt >= 0, "priocntl failed");
4003 Actual = Expected = 0xBAD;
4004 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
4005 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
4006 Actual = RTPRI(ReadBack)->rt_pri;
4007 Expected = RTPRI(ParmInfo)->rt_pri;
4008 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
4009 Actual = IAPRI(ReadBack)->ia_upri;
4010 Expected = IAPRI(ParmInfo)->ia_upri;
4011 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
4012 Actual = TSPRI(ReadBack)->ts_upri;
4013 Expected = TSPRI(ParmInfo)->ts_upri;
4014 } else {
4015 if ( ThreadPriorityVerbose ) {
4016 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid);
4017 }
4018 }
4019
4020 if (Actual != Expected) {
4021 if ( ThreadPriorityVerbose ) {
4022 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
4023 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
4024 }
4025 }
4026 #endif
4027
4028 return 0;
4029 }
4030
4031
4032
4033 // Solaris only gives access to 128 real priorities at a time,
4034 // so we expand Java's ten to fill this range. This would be better
4035 // if we dynamically adjusted relative priorities.
4036 //
4037 // The ThreadPriorityPolicy option allows us to select 2 different
4038 // priority scales.
4039 //
4040 // ThreadPriorityPolicy=0
4041 // Since the Solaris' default priority is MaximumPriority, we do not
4042 // set a priority lower than Max unless a priority lower than
4043 // NormPriority is requested.
4044 //
4045 // ThreadPriorityPolicy=1
4046 // This mode causes the priority table to get filled with
4047 // linear values. NormPriority get's mapped to 50% of the
4048 // Maximum priority an so on. This will cause VM threads
4049 // to get unfair treatment against other Solaris processes
4050 // which do not explicitly alter their thread priorities.
4051 //
4052
4053
4054 int os::java_to_os_priority[MaxPriority + 1] = {
4055 -99999, // 0 Entry should never be used
4056
4057 0, // 1 MinPriority
4058 32, // 2
4059 64, // 3
4060
4061 96, // 4
4062 127, // 5 NormPriority
4063 127, // 6
4064
4065 127, // 7
4066 127, // 8
4067 127, // 9 NearMaxPriority
4068
4069 127 // 10 MaxPriority
4070 };
4071
4072
4073 OSReturn os::set_native_priority(Thread* thread, int newpri) {
4074 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
4075 if ( !UseThreadPriorities ) return OS_OK;
4076 int status = thr_setprio(thread->osthread()->thread_id(), newpri);
4077 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) )
4078 status |= (set_lwp_priority (thread->osthread()->thread_id(),
4079 thread->osthread()->lwp_id(), newpri ));
4080 return (status == 0) ? OS_OK : OS_ERR;
4081 }
4082
4083
4084 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
4085 int p;
4086 if ( !UseThreadPriorities ) {
4087 *priority_ptr = NormalPriority;
4088 return OS_OK;
4089 }
4090 int status = thr_getprio(thread->osthread()->thread_id(), &p);
4091 if (status != 0) {
4092 return OS_ERR;
4093 }
4094 *priority_ptr = p;
4095 return OS_OK;
4096 }
4097
4098
4099 // Hint to the underlying OS that a task switch would not be good.
4100 // Void return because it's a hint and can fail.
4101 void os::hint_no_preempt() {
4102 schedctl_start(schedctl_init());
4103 }
4104
4105 void os::interrupt(Thread* thread) {
4106 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4107
4108 OSThread* osthread = thread->osthread();
4109
4110 int isInterrupted = osthread->interrupted();
4111 if (!isInterrupted) {
4112 osthread->set_interrupted(true);
4113 OrderAccess::fence();
4114 // os::sleep() is implemented with either poll (NULL,0,timeout) or
4115 // by parking on _SleepEvent. If the former, thr_kill will unwedge
4116 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper.
4117 ParkEvent * const slp = thread->_SleepEvent ;
4118 if (slp != NULL) slp->unpark() ;
4119 }
4120
4121 // For JSR166: unpark after setting status but before thr_kill -dl
4122 if (thread->is_Java_thread()) {
4123 ((JavaThread*)thread)->parker()->unpark();
4124 }
4125
4126 // Handle interruptible wait() ...
4127 ParkEvent * const ev = thread->_ParkEvent ;
4128 if (ev != NULL) ev->unpark() ;
4129
4130 // When events are used everywhere for os::sleep, then this thr_kill
4131 // will only be needed if UseVMInterruptibleIO is true.
4132
4133 if (!isInterrupted) {
4134 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt());
4135 assert_status(status == 0, status, "thr_kill");
4136
4137 // Bump thread interruption counter
4138 RuntimeService::record_thread_interrupt_signaled_count();
4139 }
4140 }
4141
4142
4143 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
4144 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4145
4146 OSThread* osthread = thread->osthread();
4147
4148 bool res = osthread->interrupted();
4149
4150 // NOTE that since there is no "lock" around these two operations,
4151 // there is the possibility that the interrupted flag will be
4152 // "false" but that the interrupt event will be set. This is
4153 // intentional. The effect of this is that Object.wait() will appear
4154 // to have a spurious wakeup, which is not harmful, and the
4155 // possibility is so rare that it is not worth the added complexity
4156 // to add yet another lock. It has also been recommended not to put
4157 // the interrupted flag into the os::Solaris::Event structure,
4158 // because it hides the issue.
4159 if (res && clear_interrupted) {
4160 osthread->set_interrupted(false);
4161 }
4162 return res;
4163 }
4164
4165
4166 void os::print_statistics() {
4167 }
4168
4169 int os::message_box(const char* title, const char* message) {
4170 int i;
4171 fdStream err(defaultStream::error_fd());
4172 for (i = 0; i < 78; i++) err.print_raw("=");
4173 err.cr();
4174 err.print_raw_cr(title);
4175 for (i = 0; i < 78; i++) err.print_raw("-");
4176 err.cr();
4177 err.print_raw_cr(message);
4178 for (i = 0; i < 78; i++) err.print_raw("=");
4179 err.cr();
4180
4181 char buf[16];
4182 // Prevent process from exiting upon "read error" without consuming all CPU
4183 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
4184
4185 return buf[0] == 'y' || buf[0] == 'Y';
4186 }
4187
4188 // A lightweight implementation that does not suspend the target thread and
4189 // thus returns only a hint. Used for profiling only!
4190 ExtendedPC os::get_thread_pc(Thread* thread) {
4191 // Make sure that it is called by the watcher and the Threads lock is owned.
4192 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
4193 // For now, is only used to profile the VM Thread
4194 assert(thread->is_VM_thread(), "Can only be called for VMThread");
4195 ExtendedPC epc;
4196
4197 GetThreadPC_Callback cb(ProfileVM_lock);
4198 OSThread *osthread = thread->osthread();
4199 const int time_to_wait = 400; // 400ms wait for initial response
4200 int status = cb.interrupt(thread, time_to_wait);
4201
4202 if (cb.is_done() ) {
4203 epc = cb.addr();
4204 } else {
4205 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status",
4206 osthread->thread_id(), status););
4207 // epc is already NULL
4208 }
4209 return epc;
4210 }
4211
4212
4213 // This does not do anything on Solaris. This is basically a hook for being
4214 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
4215 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
4216 f(value, method, args, thread);
4217 }
4218
4219 // This routine may be used by user applications as a "hook" to catch signals.
4220 // The user-defined signal handler must pass unrecognized signals to this
4221 // routine, and if it returns true (non-zero), then the signal handler must
4222 // return immediately. If the flag "abort_if_unrecognized" is true, then this
4223 // routine will never retun false (zero), but instead will execute a VM panic
4224 // routine kill the process.
4225 //
4226 // If this routine returns false, it is OK to call it again. This allows
4227 // the user-defined signal handler to perform checks either before or after
4228 // the VM performs its own checks. Naturally, the user code would be making
4229 // a serious error if it tried to handle an exception (such as a null check
4230 // or breakpoint) that the VM was generating for its own correct operation.
4231 //
4232 // This routine may recognize any of the following kinds of signals:
4233 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
4234 // os::Solaris::SIGasync
4235 // It should be consulted by handlers for any of those signals.
4236 // It explicitly does not recognize os::Solaris::SIGinterrupt
4237 //
4238 // The caller of this routine must pass in the three arguments supplied
4239 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
4240 // field of the structure passed to sigaction(). This routine assumes that
4241 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
4242 //
4243 // Note that the VM will print warnings if it detects conflicting signal
4244 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
4245 //
4246 extern "C" JNIEXPORT int
4247 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext,
4248 int abort_if_unrecognized);
4249
4250
4251 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
4252 JVM_handle_solaris_signal(sig, info, ucVoid, true);
4253 }
4254
4255 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
4256 is needed to provoke threads blocked on IO to return an EINTR
4257 Note: this explicitly does NOT call JVM_handle_solaris_signal and
4258 does NOT participate in signal chaining due to requirement for
4259 NOT setting SA_RESTART to make EINTR work. */
4260 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
4261 if (UseSignalChaining) {
4262 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
4263 if (actp && actp->sa_handler) {
4264 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
4265 }
4266 }
4267 }
4268
4269 // This boolean allows users to forward their own non-matching signals
4270 // to JVM_handle_solaris_signal, harmlessly.
4271 bool os::Solaris::signal_handlers_are_installed = false;
4272
4273 // For signal-chaining
4274 bool os::Solaris::libjsig_is_loaded = false;
4275 typedef struct sigaction *(*get_signal_t)(int);
4276 get_signal_t os::Solaris::get_signal_action = NULL;
4277
4278 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
4279 struct sigaction *actp = NULL;
4280
4281 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
4282 // Retrieve the old signal handler from libjsig
4283 actp = (*get_signal_action)(sig);
4284 }
4285 if (actp == NULL) {
4286 // Retrieve the preinstalled signal handler from jvm
4287 actp = get_preinstalled_handler(sig);
4288 }
4289
4290 return actp;
4291 }
4292
4293 static bool call_chained_handler(struct sigaction *actp, int sig,
4294 siginfo_t *siginfo, void *context) {
4295 // Call the old signal handler
4296 if (actp->sa_handler == SIG_DFL) {
4297 // It's more reasonable to let jvm treat it as an unexpected exception
4298 // instead of taking the default action.
4299 return false;
4300 } else if (actp->sa_handler != SIG_IGN) {
4301 if ((actp->sa_flags & SA_NODEFER) == 0) {
4302 // automaticlly block the signal
4303 sigaddset(&(actp->sa_mask), sig);
4304 }
4305
4306 sa_handler_t hand;
4307 sa_sigaction_t sa;
4308 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4309 // retrieve the chained handler
4310 if (siginfo_flag_set) {
4311 sa = actp->sa_sigaction;
4312 } else {
4313 hand = actp->sa_handler;
4314 }
4315
4316 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4317 actp->sa_handler = SIG_DFL;
4318 }
4319
4320 // try to honor the signal mask
4321 sigset_t oset;
4322 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4323
4324 // call into the chained handler
4325 if (siginfo_flag_set) {
4326 (*sa)(sig, siginfo, context);
4327 } else {
4328 (*hand)(sig);
4329 }
4330
4331 // restore the signal mask
4332 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4333 }
4334 // Tell jvm's signal handler the signal is taken care of.
4335 return true;
4336 }
4337
4338 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4339 bool chained = false;
4340 // signal-chaining
4341 if (UseSignalChaining) {
4342 struct sigaction *actp = get_chained_signal_action(sig);
4343 if (actp != NULL) {
4344 chained = call_chained_handler(actp, sig, siginfo, context);
4345 }
4346 }
4347 return chained;
4348 }
4349
4350 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4351 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4352 if (preinstalled_sigs[sig] != 0) {
4353 return &chainedsigactions[sig];
4354 }
4355 return NULL;
4356 }
4357
4358 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
4359
4360 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4361 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4362 chainedsigactions[sig] = oldAct;
4363 preinstalled_sigs[sig] = 1;
4364 }
4365
4366 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
4367 // Check for overwrite.
4368 struct sigaction oldAct;
4369 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4370 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4371 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4372 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4373 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4374 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4375 if (AllowUserSignalHandlers || !set_installed) {
4376 // Do not overwrite; user takes responsibility to forward to us.
4377 return;
4378 } else if (UseSignalChaining) {
4379 if (oktochain) {
4380 // save the old handler in jvm
4381 save_preinstalled_handler(sig, oldAct);
4382 } else {
4383 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4384 }
4385 // libjsig also interposes the sigaction() call below and saves the
4386 // old sigaction on it own.
4387 } else {
4388 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4389 "%#lx for signal %d.", (long)oldhand, sig));
4390 }
4391 }
4392
4393 struct sigaction sigAct;
4394 sigfillset(&(sigAct.sa_mask));
4395 sigAct.sa_handler = SIG_DFL;
4396
4397 sigAct.sa_sigaction = signalHandler;
4398 // Handle SIGSEGV on alternate signal stack if
4399 // not using stack banging
4400 if (!UseStackBanging && sig == SIGSEGV) {
4401 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4402 // Interruptible i/o requires SA_RESTART cleared so EINTR
4403 // is returned instead of restarting system calls
4404 } else if (sig == os::Solaris::SIGinterrupt()) {
4405 sigemptyset(&sigAct.sa_mask);
4406 sigAct.sa_handler = NULL;
4407 sigAct.sa_flags = SA_SIGINFO;
4408 sigAct.sa_sigaction = sigINTRHandler;
4409 } else {
4410 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4411 }
4412 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4413
4414 sigaction(sig, &sigAct, &oldAct);
4415
4416 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4417 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4418 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4419 }
4420
4421
4422 #define DO_SIGNAL_CHECK(sig) \
4423 if (!sigismember(&check_signal_done, sig)) \
4424 os::Solaris::check_signal_handler(sig)
4425
4426 // This method is a periodic task to check for misbehaving JNI applications
4427 // under CheckJNI, we can add any periodic checks here
4428
4429 void os::run_periodic_checks() {
4430 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4431 // thereby preventing a NULL checks.
4432 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
4433
4434 if (check_signals == false) return;
4435
4436 // SEGV and BUS if overridden could potentially prevent
4437 // generation of hs*.log in the event of a crash, debugging
4438 // such a case can be very challenging, so we absolutely
4439 // check for the following for a good measure:
4440 DO_SIGNAL_CHECK(SIGSEGV);
4441 DO_SIGNAL_CHECK(SIGILL);
4442 DO_SIGNAL_CHECK(SIGFPE);
4443 DO_SIGNAL_CHECK(SIGBUS);
4444 DO_SIGNAL_CHECK(SIGPIPE);
4445 DO_SIGNAL_CHECK(SIGXFSZ);
4446
4447 // ReduceSignalUsage allows the user to override these handlers
4448 // see comments at the very top and jvm_solaris.h
4449 if (!ReduceSignalUsage) {
4450 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4451 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4452 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4453 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4454 }
4455
4456 // See comments above for using JVM1/JVM2 and UseAltSigs
4457 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4458 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4459
4460 }
4461
4462 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4463
4464 static os_sigaction_t os_sigaction = NULL;
4465
4466 void os::Solaris::check_signal_handler(int sig) {
4467 char buf[O_BUFLEN];
4468 address jvmHandler = NULL;
4469
4470 struct sigaction act;
4471 if (os_sigaction == NULL) {
4472 // only trust the default sigaction, in case it has been interposed
4473 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4474 if (os_sigaction == NULL) return;
4475 }
4476
4477 os_sigaction(sig, (struct sigaction*)NULL, &act);
4478
4479 address thisHandler = (act.sa_flags & SA_SIGINFO)
4480 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4481 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
4482
4483
4484 switch(sig) {
4485 case SIGSEGV:
4486 case SIGBUS:
4487 case SIGFPE:
4488 case SIGPIPE:
4489 case SIGXFSZ:
4490 case SIGILL:
4491 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4492 break;
4493
4494 case SHUTDOWN1_SIGNAL:
4495 case SHUTDOWN2_SIGNAL:
4496 case SHUTDOWN3_SIGNAL:
4497 case BREAK_SIGNAL:
4498 jvmHandler = (address)user_handler();
4499 break;
4500
4501 default:
4502 int intrsig = os::Solaris::SIGinterrupt();
4503 int asynsig = os::Solaris::SIGasync();
4504
4505 if (sig == intrsig) {
4506 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4507 } else if (sig == asynsig) {
4508 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4509 } else {
4510 return;
4511 }
4512 break;
4513 }
4514
4515
4516 if (thisHandler != jvmHandler) {
4517 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4518 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4519 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4520 // No need to check this sig any longer
4521 sigaddset(&check_signal_done, sig);
4522 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4523 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4524 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4525 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4526 // No need to check this sig any longer
4527 sigaddset(&check_signal_done, sig);
4528 }
4529
4530 // Print all the signal handler state
4531 if (sigismember(&check_signal_done, sig)) {
4532 print_signal_handlers(tty, buf, O_BUFLEN);
4533 }
4534
4535 }
4536
4537 void os::Solaris::install_signal_handlers() {
4538 bool libjsigdone = false;
4539 signal_handlers_are_installed = true;
4540
4541 // signal-chaining
4542 typedef void (*signal_setting_t)();
4543 signal_setting_t begin_signal_setting = NULL;
4544 signal_setting_t end_signal_setting = NULL;
4545 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4546 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4547 if (begin_signal_setting != NULL) {
4548 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4549 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4550 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4551 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4552 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4553 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4554 libjsig_is_loaded = true;
4555 if (os::Solaris::get_libjsig_version != NULL) {
4556 libjsigversion = (*os::Solaris::get_libjsig_version)();
4557 }
4558 assert(UseSignalChaining, "should enable signal-chaining");
4559 }
4560 if (libjsig_is_loaded) {
4561 // Tell libjsig jvm is setting signal handlers
4562 (*begin_signal_setting)();
4563 }
4564
4565 set_signal_handler(SIGSEGV, true, true);
4566 set_signal_handler(SIGPIPE, true, true);
4567 set_signal_handler(SIGXFSZ, true, true);
4568 set_signal_handler(SIGBUS, true, true);
4569 set_signal_handler(SIGILL, true, true);
4570 set_signal_handler(SIGFPE, true, true);
4571
4572
4573 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4574
4575 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4576 // can not register overridable signals which might be > 32
4577 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4578 // Tell libjsig jvm has finished setting signal handlers
4579 (*end_signal_setting)();
4580 libjsigdone = true;
4581 }
4582 }
4583
4584 // Never ok to chain our SIGinterrupt
4585 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4586 set_signal_handler(os::Solaris::SIGasync(), true, true);
4587
4588 if (libjsig_is_loaded && !libjsigdone) {
4589 // Tell libjsig jvm finishes setting signal handlers
4590 (*end_signal_setting)();
4591 }
4592
4593 // We don't activate signal checker if libjsig is in place, we trust ourselves
4594 // and if UserSignalHandler is installed all bets are off
4595 if (CheckJNICalls) {
4596 if (libjsig_is_loaded) {
4597 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4598 check_signals = false;
4599 }
4600 if (AllowUserSignalHandlers) {
4601 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4602 check_signals = false;
4603 }
4604 }
4605 }
4606
4607
4608 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
4609
4610 const char * signames[] = {
4611 "SIG0",
4612 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4613 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4614 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4615 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4616 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4617 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4618 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4619 "SIGCANCEL", "SIGLOST"
4620 };
4621
4622 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4623 if (0 < exception_code && exception_code <= SIGRTMAX) {
4624 // signal
4625 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4626 jio_snprintf(buf, size, "%s", signames[exception_code]);
4627 } else {
4628 jio_snprintf(buf, size, "SIG%d", exception_code);
4629 }
4630 return buf;
4631 } else {
4632 return NULL;
4633 }
4634 }
4635
4636 // (Static) wrappers for the new libthread API
4637 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
4638 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
4639 int_fnP_thread_t_i os::Solaris::_thr_setmutator;
4640 int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
4641 int_fnP_thread_t os::Solaris::_thr_continue_mutator;
4642
4643 // (Static) wrapper for getisax(2) call.
4644 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4645
4646 // (Static) wrappers for the liblgrp API
4647 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4648 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4649 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4650 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4651 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4652 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4653 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4654 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4655 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4656
4657 // (Static) wrapper for meminfo() call.
4658 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4659
4660 static address resolve_symbol_lazy(const char* name) {
4661 address addr = (address) dlsym(RTLD_DEFAULT, name);
4662 if(addr == NULL) {
4663 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4664 addr = (address) dlsym(RTLD_NEXT, name);
4665 }
4666 return addr;
4667 }
4668
4669 static address resolve_symbol(const char* name) {
4670 address addr = resolve_symbol_lazy(name);
4671 if(addr == NULL) {
4672 fatal(dlerror());
4673 }
4674 return addr;
4675 }
4676
4677
4678
4679 // isT2_libthread()
4680 //
4681 // Routine to determine if we are currently using the new T2 libthread.
4682 //
4683 // We determine if we are using T2 by reading /proc/self/lstatus and
4684 // looking for a thread with the ASLWP bit set. If we find this status
4685 // bit set, we must assume that we are NOT using T2. The T2 team
4686 // has approved this algorithm.
4687 //
4688 // We need to determine if we are running with the new T2 libthread
4689 // since setting native thread priorities is handled differently
4690 // when using this library. All threads created using T2 are bound
4691 // threads. Calling thr_setprio is meaningless in this case.
4692 //
4693 bool isT2_libthread() {
4694 static prheader_t * lwpArray = NULL;
4695 static int lwpSize = 0;
4696 static int lwpFile = -1;
4697 lwpstatus_t * that;
4698 char lwpName [128];
4699 bool isT2 = false;
4700
4701 #define ADR(x) ((uintptr_t)(x))
4702 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
4703
4704 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0);
4705 if (lwpFile < 0) {
4706 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n");
4707 return false;
4708 }
4709 lwpSize = 16*1024;
4710 for (;;) {
4711 ::lseek64 (lwpFile, 0, SEEK_SET);
4712 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize);
4713 if (::read(lwpFile, lwpArray, lwpSize) < 0) {
4714 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n");
4715 break;
4716 }
4717 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
4718 // We got a good snapshot - now iterate over the list.
4719 int aslwpcount = 0;
4720 for (int i = 0; i < lwpArray->pr_nent; i++ ) {
4721 that = LWPINDEX(lwpArray,i);
4722 if (that->pr_flags & PR_ASLWP) {
4723 aslwpcount++;
4724 }
4725 }
4726 if (aslwpcount == 0) isT2 = true;
4727 break;
4728 }
4729 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
4730 FREE_C_HEAP_ARRAY(char, lwpArray); // retry.
4731 }
4732
4733 FREE_C_HEAP_ARRAY(char, lwpArray);
4734 ::close (lwpFile);
4735 if (ThreadPriorityVerbose) {
4736 if (isT2) tty->print_cr("We are running with a T2 libthread\n");
4737 else tty->print_cr("We are not running with a T2 libthread\n");
4738 }
4739 return isT2;
4740 }
4741
4742
4743 void os::Solaris::libthread_init() {
4744 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4745
4746 // Determine if we are running with the new T2 libthread
4747 os::Solaris::set_T2_libthread(isT2_libthread());
4748
4749 lwp_priocntl_init();
4750
4751 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4752 if(func == NULL) {
4753 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4754 // Guarantee that this VM is running on an new enough OS (5.6 or
4755 // later) that it will have a new enough libthread.so.
4756 guarantee(func != NULL, "libthread.so is too old.");
4757 }
4758
4759 // Initialize the new libthread getstate API wrappers
4760 func = resolve_symbol("thr_getstate");
4761 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
4762
4763 func = resolve_symbol("thr_setstate");
4764 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
4765
4766 func = resolve_symbol("thr_setmutator");
4767 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
4768
4769 func = resolve_symbol("thr_suspend_mutator");
4770 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4771
4772 func = resolve_symbol("thr_continue_mutator");
4773 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4774
4775 int size;
4776 void (*handler_info_func)(address *, int *);
4777 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4778 handler_info_func(&handler_start, &size);
4779 handler_end = handler_start + size;
4780 }
4781
4782
4783 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4784 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4785 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4786 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4787 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4788 int os::Solaris::_mutex_scope = USYNC_THREAD;
4789
4790 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4791 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4792 int_fnP_cond_tP os::Solaris::_cond_signal;
4793 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4794 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4795 int_fnP_cond_tP os::Solaris::_cond_destroy;
4796 int os::Solaris::_cond_scope = USYNC_THREAD;
4797
4798 void os::Solaris::synchronization_init() {
4799 if(UseLWPSynchronization) {
4800 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4801 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4802 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4803 os::Solaris::set_mutex_init(lwp_mutex_init);
4804 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4805 os::Solaris::set_mutex_scope(USYNC_THREAD);
4806
4807 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4808 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4809 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4810 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4811 os::Solaris::set_cond_init(lwp_cond_init);
4812 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4813 os::Solaris::set_cond_scope(USYNC_THREAD);
4814 }
4815 else {
4816 os::Solaris::set_mutex_scope(USYNC_THREAD);
4817 os::Solaris::set_cond_scope(USYNC_THREAD);
4818
4819 if(UsePthreads) {
4820 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4821 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4822 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4823 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4824 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4825
4826 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4827 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4828 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4829 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4830 os::Solaris::set_cond_init(pthread_cond_default_init);
4831 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4832 }
4833 else {
4834 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4835 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4836 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4837 os::Solaris::set_mutex_init(::mutex_init);
4838 os::Solaris::set_mutex_destroy(::mutex_destroy);
4839
4840 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4841 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4842 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4843 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4844 os::Solaris::set_cond_init(::cond_init);
4845 os::Solaris::set_cond_destroy(::cond_destroy);
4846 }
4847 }
4848 }
4849
4850 bool os::Solaris::liblgrp_init() {
4851 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4852 if (handle != NULL) {
4853 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4854 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4855 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4856 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4857 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4858 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4859 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4860 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4861 dlsym(handle, "lgrp_cookie_stale")));
4862
4863 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4864 set_lgrp_cookie(c);
4865 return true;
4866 }
4867 return false;
4868 }
4869
4870 void os::Solaris::misc_sym_init() {
4871 address func;
4872
4873 // getisax
4874 func = resolve_symbol_lazy("getisax");
4875 if (func != NULL) {
4876 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4877 }
4878
4879 // meminfo
4880 func = resolve_symbol_lazy("meminfo");
4881 if (func != NULL) {
4882 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4883 }
4884 }
4885
4886 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4887 assert(_getisax != NULL, "_getisax not set");
4888 return _getisax(array, n);
4889 }
4890
4891 // Symbol doesn't exist in Solaris 8 pset.h
4892 #ifndef PS_MYID
4893 #define PS_MYID -3
4894 #endif
4895
4896 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4897 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4898 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4899
4900 void init_pset_getloadavg_ptr(void) {
4901 pset_getloadavg_ptr =
4902 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4903 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4904 warning("pset_getloadavg function not found");
4905 }
4906 }
4907
4908 int os::Solaris::_dev_zero_fd = -1;
4909
4910 // this is called _before_ the global arguments have been parsed
4911 void os::init(void) {
4912 _initial_pid = getpid();
4913
4914 max_hrtime = first_hrtime = gethrtime();
4915
4916 init_random(1234567);
4917
4918 page_size = sysconf(_SC_PAGESIZE);
4919 if (page_size == -1)
4920 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4921 strerror(errno)));
4922 init_page_sizes((size_t) page_size);
4923
4924 Solaris::initialize_system_info();
4925
4926 // Initialize misc. symbols as soon as possible, so we can use them
4927 // if we need them.
4928 Solaris::misc_sym_init();
4929
4930 int fd = ::open("/dev/zero", O_RDWR);
4931 if (fd < 0) {
4932 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
4933 } else {
4934 Solaris::set_dev_zero_fd(fd);
4935
4936 // Close on exec, child won't inherit.
4937 fcntl(fd, F_SETFD, FD_CLOEXEC);
4938 }
4939
4940 clock_tics_per_sec = CLK_TCK;
4941
4942 // check if dladdr1() exists; dladdr1 can provide more information than
4943 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4944 // and is available on linker patches for 5.7 and 5.8.
4945 // libdl.so must have been loaded, this call is just an entry lookup
4946 void * hdl = dlopen("libdl.so", RTLD_NOW);
4947 if (hdl)
4948 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4949
4950 // (Solaris only) this switches to calls that actually do locking.
4951 ThreadCritical::initialize();
4952
4953 main_thread = thr_self();
4954
4955 // Constant minimum stack size allowed. It must be at least
4956 // the minimum of what the OS supports (thr_min_stack()), and
4957 // enough to allow the thread to get to user bytecode execution.
4958 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4959 // If the pagesize of the VM is greater than 8K determine the appropriate
4960 // number of initial guard pages. The user can change this with the
4961 // command line arguments, if needed.
4962 if (vm_page_size() > 8*K) {
4963 StackYellowPages = 1;
4964 StackRedPages = 1;
4965 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4966 }
4967 }
4968
4969 // To install functions for atexit system call
4970 extern "C" {
4971 static void perfMemory_exit_helper() {
4972 perfMemory_exit();
4973 }
4974 }
4975
4976 // this is called _after_ the global arguments have been parsed
4977 jint os::init_2(void) {
4978 // try to enable extended file IO ASAP, see 6431278
4979 os::Solaris::try_enable_extended_io();
4980
4981 // Allocate a single page and mark it as readable for safepoint polling. Also
4982 // use this first mmap call to check support for MAP_ALIGN.
4983 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4984 page_size,
4985 MAP_PRIVATE | MAP_ALIGN,
4986 PROT_READ);
4987 if (polling_page == NULL) {
4988 has_map_align = false;
4989 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4990 PROT_READ);
4991 }
4992
4993 os::set_polling_page(polling_page);
4994
4995 #ifndef PRODUCT
4996 if( Verbose && PrintMiscellaneous )
4997 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
4998 #endif
4999
5000 if (!UseMembar) {
5001 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
5002 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
5003 os::set_memory_serialize_page( mem_serialize_page );
5004
5005 #ifndef PRODUCT
5006 if(Verbose && PrintMiscellaneous)
5007 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
5008 #endif
5009 }
5010
5011 os::large_page_init();
5012
5013 // Check minimum allowable stack size for thread creation and to initialize
5014 // the java system classes, including StackOverflowError - depends on page
5015 // size. Add a page for compiler2 recursion in main thread.
5016 // Add in 2*BytesPerWord times page size to account for VM stack during
5017 // class initialization depending on 32 or 64 bit VM.
5018 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
5019 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
5020 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
5021
5022 size_t threadStackSizeInBytes = ThreadStackSize * K;
5023 if (threadStackSizeInBytes != 0 &&
5024 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
5025 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
5026 os::Solaris::min_stack_allowed/K);
5027 return JNI_ERR;
5028 }
5029
5030 // For 64kbps there will be a 64kb page size, which makes
5031 // the usable default stack size quite a bit less. Increase the
5032 // stack for 64kb (or any > than 8kb) pages, this increases
5033 // virtual memory fragmentation (since we're not creating the
5034 // stack on a power of 2 boundary. The real fix for this
5035 // should be to fix the guard page mechanism.
5036
5037 if (vm_page_size() > 8*K) {
5038 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
5039 ? threadStackSizeInBytes +
5040 ((StackYellowPages + StackRedPages) * vm_page_size())
5041 : 0;
5042 ThreadStackSize = threadStackSizeInBytes/K;
5043 }
5044
5045 // Make the stack size a multiple of the page size so that
5046 // the yellow/red zones can be guarded.
5047 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
5048 vm_page_size()));
5049
5050 Solaris::libthread_init();
5051
5052 if (UseNUMA) {
5053 if (!Solaris::liblgrp_init()) {
5054 UseNUMA = false;
5055 } else {
5056 size_t lgrp_limit = os::numa_get_groups_num();
5057 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit);
5058 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
5059 FREE_C_HEAP_ARRAY(int, lgrp_ids);
5060 if (lgrp_num < 2) {
5061 // There's only one locality group, disable NUMA.
5062 UseNUMA = false;
5063 }
5064 }
5065 // ISM is not compatible with the NUMA allocator - it always allocates
5066 // pages round-robin across the lgroups.
5067 if (UseNUMA && UseLargePages && UseISM) {
5068 if (!FLAG_IS_DEFAULT(UseNUMA)) {
5069 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) {
5070 UseLargePages = false;
5071 } else {
5072 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator");
5073 UseNUMA = false;
5074 }
5075 } else {
5076 UseNUMA = false;
5077 }
5078 }
5079 if (!UseNUMA && ForceNUMA) {
5080 UseNUMA = true;
5081 }
5082 }
5083
5084 Solaris::signal_sets_init();
5085 Solaris::init_signal_mem();
5086 Solaris::install_signal_handlers();
5087
5088 if (libjsigversion < JSIG_VERSION_1_4_1) {
5089 Maxlibjsigsigs = OLDMAXSIGNUM;
5090 }
5091
5092 // initialize synchronization primitives to use either thread or
5093 // lwp synchronization (controlled by UseLWPSynchronization)
5094 Solaris::synchronization_init();
5095
5096 if (MaxFDLimit) {
5097 // set the number of file descriptors to max. print out error
5098 // if getrlimit/setrlimit fails but continue regardless.
5099 struct rlimit nbr_files;
5100 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
5101 if (status != 0) {
5102 if (PrintMiscellaneous && (Verbose || WizardMode))
5103 perror("os::init_2 getrlimit failed");
5104 } else {
5105 nbr_files.rlim_cur = nbr_files.rlim_max;
5106 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
5107 if (status != 0) {
5108 if (PrintMiscellaneous && (Verbose || WizardMode))
5109 perror("os::init_2 setrlimit failed");
5110 }
5111 }
5112 }
5113
5114 // Calculate theoretical max. size of Threads to guard gainst
5115 // artifical out-of-memory situations, where all available address-
5116 // space has been reserved by thread stacks. Default stack size is 1Mb.
5117 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
5118 JavaThread::stack_size_at_create() : (1*K*K);
5119 assert(pre_thread_stack_size != 0, "Must have a stack");
5120 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
5121 // we should start doing Virtual Memory banging. Currently when the threads will
5122 // have used all but 200Mb of space.
5123 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
5124 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
5125
5126 // at-exit methods are called in the reverse order of their registration.
5127 // In Solaris 7 and earlier, atexit functions are called on return from
5128 // main or as a result of a call to exit(3C). There can be only 32 of
5129 // these functions registered and atexit() does not set errno. In Solaris
5130 // 8 and later, there is no limit to the number of functions registered
5131 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
5132 // functions are called upon dlclose(3DL) in addition to return from main
5133 // and exit(3C).
5134
5135 if (PerfAllowAtExitRegistration) {
5136 // only register atexit functions if PerfAllowAtExitRegistration is set.
5137 // atexit functions can be delayed until process exit time, which
5138 // can be problematic for embedded VM situations. Embedded VMs should
5139 // call DestroyJavaVM() to assure that VM resources are released.
5140
5141 // note: perfMemory_exit_helper atexit function may be removed in
5142 // the future if the appropriate cleanup code can be added to the
5143 // VM_Exit VMOperation's doit method.
5144 if (atexit(perfMemory_exit_helper) != 0) {
5145 warning("os::init2 atexit(perfMemory_exit_helper) failed");
5146 }
5147 }
5148
5149 // Init pset_loadavg function pointer
5150 init_pset_getloadavg_ptr();
5151
5152 return JNI_OK;
5153 }
5154
5155 void os::init_3(void) {
5156 return;
5157 }
5158
5159 // Mark the polling page as unreadable
5160 void os::make_polling_page_unreadable(void) {
5161 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
5162 fatal("Could not disable polling page");
5163 };
5164
5165 // Mark the polling page as readable
5166 void os::make_polling_page_readable(void) {
5167 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
5168 fatal("Could not enable polling page");
5169 };
5170
5171 // OS interface.
5172
5173 bool os::check_heap(bool force) { return true; }
5174
5175 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
5176 static vsnprintf_t sol_vsnprintf = NULL;
5177
5178 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
5179 if (!sol_vsnprintf) {
5180 //search for the named symbol in the objects that were loaded after libjvm
5181 void* where = RTLD_NEXT;
5182 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5183 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5184 if (!sol_vsnprintf){
5185 //search for the named symbol in the objects that were loaded before libjvm
5186 where = RTLD_DEFAULT;
5187 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5188 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5189 assert(sol_vsnprintf != NULL, "vsnprintf not found");
5190 }
5191 }
5192 return (*sol_vsnprintf)(buf, count, fmt, argptr);
5193 }
5194
5195
5196 // Is a (classpath) directory empty?
5197 bool os::dir_is_empty(const char* path) {
5198 DIR *dir = NULL;
5199 struct dirent *ptr;
5200
5201 dir = opendir(path);
5202 if (dir == NULL) return true;
5203
5204 /* Scan the directory */
5205 bool result = true;
5206 char buf[sizeof(struct dirent) + MAX_PATH];
5207 struct dirent *dbuf = (struct dirent *) buf;
5208 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
5209 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
5210 result = false;
5211 }
5212 }
5213 closedir(dir);
5214 return result;
5215 }
5216
5217 // This code originates from JDK's sysOpen and open64_w
5218 // from src/solaris/hpi/src/system_md.c
5219
5220 #ifndef O_DELETE
5221 #define O_DELETE 0x10000
5222 #endif
5223
5224 // Open a file. Unlink the file immediately after open returns
5225 // if the specified oflag has the O_DELETE flag set.
5226 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
5227
5228 int os::open(const char *path, int oflag, int mode) {
5229 if (strlen(path) > MAX_PATH - 1) {
5230 errno = ENAMETOOLONG;
5231 return -1;
5232 }
5233 int fd;
5234 int o_delete = (oflag & O_DELETE);
5235 oflag = oflag & ~O_DELETE;
5236
5237 fd = ::open64(path, oflag, mode);
5238 if (fd == -1) return -1;
5239
5240 //If the open succeeded, the file might still be a directory
5241 {
5242 struct stat64 buf64;
5243 int ret = ::fstat64(fd, &buf64);
5244 int st_mode = buf64.st_mode;
5245
5246 if (ret != -1) {
5247 if ((st_mode & S_IFMT) == S_IFDIR) {
5248 errno = EISDIR;
5249 ::close(fd);
5250 return -1;
5251 }
5252 } else {
5253 ::close(fd);
5254 return -1;
5255 }
5256 }
5257 /*
5258 * 32-bit Solaris systems suffer from:
5259 *
5260 * - an historical default soft limit of 256 per-process file
5261 * descriptors that is too low for many Java programs.
5262 *
5263 * - a design flaw where file descriptors created using stdio
5264 * fopen must be less than 256, _even_ when the first limit above
5265 * has been raised. This can cause calls to fopen (but not calls to
5266 * open, for example) to fail mysteriously, perhaps in 3rd party
5267 * native code (although the JDK itself uses fopen). One can hardly
5268 * criticize them for using this most standard of all functions.
5269 *
5270 * We attempt to make everything work anyways by:
5271 *
5272 * - raising the soft limit on per-process file descriptors beyond
5273 * 256
5274 *
5275 * - As of Solaris 10u4, we can request that Solaris raise the 256
5276 * stdio fopen limit by calling function enable_extended_FILE_stdio.
5277 * This is done in init_2 and recorded in enabled_extended_FILE_stdio
5278 *
5279 * - If we are stuck on an old (pre 10u4) Solaris system, we can
5280 * workaround the bug by remapping non-stdio file descriptors below
5281 * 256 to ones beyond 256, which is done below.
5282 *
5283 * See:
5284 * 1085341: 32-bit stdio routines should support file descriptors >255
5285 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files
5286 * 6431278: Netbeans crash on 32 bit Solaris: need to call
5287 * enable_extended_FILE_stdio() in VM initialisation
5288 * Giri Mandalika's blog
5289 * http://technopark02.blogspot.com/2005_05_01_archive.html
5290 */
5291 #ifndef _LP64
5292 if ((!enabled_extended_FILE_stdio) && fd < 256) {
5293 int newfd = ::fcntl(fd, F_DUPFD, 256);
5294 if (newfd != -1) {
5295 ::close(fd);
5296 fd = newfd;
5297 }
5298 }
5299 #endif // 32-bit Solaris
5300 /*
5301 * All file descriptors that are opened in the JVM and not
5302 * specifically destined for a subprocess should have the
5303 * close-on-exec flag set. If we don't set it, then careless 3rd
5304 * party native code might fork and exec without closing all
5305 * appropriate file descriptors (e.g. as we do in closeDescriptors in
5306 * UNIXProcess.c), and this in turn might:
5307 *
5308 * - cause end-of-file to fail to be detected on some file
5309 * descriptors, resulting in mysterious hangs, or
5310 *
5311 * - might cause an fopen in the subprocess to fail on a system
5312 * suffering from bug 1085341.
5313 *
5314 * (Yes, the default setting of the close-on-exec flag is a Unix
5315 * design flaw)
5316 *
5317 * See:
5318 * 1085341: 32-bit stdio routines should support file descriptors >255
5319 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
5320 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
5321 */
5322 #ifdef FD_CLOEXEC
5323 {
5324 int flags = ::fcntl(fd, F_GETFD);
5325 if (flags != -1)
5326 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
5327 }
5328 #endif
5329
5330 if (o_delete != 0) {
5331 ::unlink(path);
5332 }
5333 return fd;
5334 }
5335
5336 // create binary file, rewriting existing file if required
5337 int os::create_binary_file(const char* path, bool rewrite_existing) {
5338 int oflags = O_WRONLY | O_CREAT;
5339 if (!rewrite_existing) {
5340 oflags |= O_EXCL;
5341 }
5342 return ::open64(path, oflags, S_IREAD | S_IWRITE);
5343 }
5344
5345 // return current position of file pointer
5346 jlong os::current_file_offset(int fd) {
5347 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
5348 }
5349
5350 // move file pointer to the specified offset
5351 jlong os::seek_to_file_offset(int fd, jlong offset) {
5352 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
5353 }
5354
5355 jlong os::lseek(int fd, jlong offset, int whence) {
5356 return (jlong) ::lseek64(fd, offset, whence);
5357 }
5358
5359 char * os::native_path(char *path) {
5360 return path;
5361 }
5362
5363 int os::ftruncate(int fd, jlong length) {
5364 return ::ftruncate64(fd, length);
5365 }
5366
5367 int os::fsync(int fd) {
5368 RESTARTABLE_RETURN_INT(::fsync(fd));
5369 }
5370
5371 int os::available(int fd, jlong *bytes) {
5372 jlong cur, end;
5373 int mode;
5374 struct stat64 buf64;
5375
5376 if (::fstat64(fd, &buf64) >= 0) {
5377 mode = buf64.st_mode;
5378 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
5379 /*
5380 * XXX: is the following call interruptible? If so, this might
5381 * need to go through the INTERRUPT_IO() wrapper as for other
5382 * blocking, interruptible calls in this file.
5383 */
5384 int n,ioctl_return;
5385
5386 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted);
5387 if (ioctl_return>= 0) {
5388 *bytes = n;
5389 return 1;
5390 }
5391 }
5392 }
5393 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
5394 return 0;
5395 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
5396 return 0;
5397 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
5398 return 0;
5399 }
5400 *bytes = end - cur;
5401 return 1;
5402 }
5403
5404 // Map a block of memory.
5405 char* os::map_memory(int fd, const char* file_name, size_t file_offset,
5406 char *addr, size_t bytes, bool read_only,
5407 bool allow_exec) {
5408 int prot;
5409 int flags;
5410
5411 if (read_only) {
5412 prot = PROT_READ;
5413 flags = MAP_SHARED;
5414 } else {
5415 prot = PROT_READ | PROT_WRITE;
5416 flags = MAP_PRIVATE;
5417 }
5418
5419 if (allow_exec) {
5420 prot |= PROT_EXEC;
5421 }
5422
5423 if (addr != NULL) {
5424 flags |= MAP_FIXED;
5425 }
5426
5427 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5428 fd, file_offset);
5429 if (mapped_address == MAP_FAILED) {
5430 return NULL;
5431 }
5432 return mapped_address;
5433 }
5434
5435
5436 // Remap a block of memory.
5437 char* os::remap_memory(int fd, const char* file_name, size_t file_offset,
5438 char *addr, size_t bytes, bool read_only,
5439 bool allow_exec) {
5440 // same as map_memory() on this OS
5441 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5442 allow_exec);
5443 }
5444
5445
5446 // Unmap a block of memory.
5447 bool os::unmap_memory(char* addr, size_t bytes) {
5448 return munmap(addr, bytes) == 0;
5449 }
5450
5451 void os::pause() {
5452 char filename[MAX_PATH];
5453 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5454 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5455 } else {
5456 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5457 }
5458
5459 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5460 if (fd != -1) {
5461 struct stat buf;
5462 ::close(fd);
5463 while (::stat(filename, &buf) == 0) {
5464 (void)::poll(NULL, 0, 100);
5465 }
5466 } else {
5467 jio_fprintf(stderr,
5468 "Could not open pause file '%s', continuing immediately.\n", filename);
5469 }
5470 }
5471
5472 #ifndef PRODUCT
5473 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5474 // Turn this on if you need to trace synch operations.
5475 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5476 // and call record_synch_enable and record_synch_disable
5477 // around the computation of interest.
5478
5479 void record_synch(char* name, bool returning); // defined below
5480
5481 class RecordSynch {
5482 char* _name;
5483 public:
5484 RecordSynch(char* name) :_name(name)
5485 { record_synch(_name, false); }
5486 ~RecordSynch() { record_synch(_name, true); }
5487 };
5488
5489 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5490 extern "C" ret name params { \
5491 typedef ret name##_t params; \
5492 static name##_t* implem = NULL; \
5493 static int callcount = 0; \
5494 if (implem == NULL) { \
5495 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5496 if (implem == NULL) fatal(dlerror()); \
5497 } \
5498 ++callcount; \
5499 RecordSynch _rs(#name); \
5500 inner; \
5501 return implem args; \
5502 }
5503 // in dbx, examine callcounts this way:
5504 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5505
5506 #define CHECK_POINTER_OK(p) \
5507 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p)))
5508 #define CHECK_MU \
5509 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5510 #define CHECK_CV \
5511 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5512 #define CHECK_P(p) \
5513 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5514
5515 #define CHECK_MUTEX(mutex_op) \
5516 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5517
5518 CHECK_MUTEX( mutex_lock)
5519 CHECK_MUTEX( _mutex_lock)
5520 CHECK_MUTEX( mutex_unlock)
5521 CHECK_MUTEX(_mutex_unlock)
5522 CHECK_MUTEX( mutex_trylock)
5523 CHECK_MUTEX(_mutex_trylock)
5524
5525 #define CHECK_COND(cond_op) \
5526 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
5527
5528 CHECK_COND( cond_wait);
5529 CHECK_COND(_cond_wait);
5530 CHECK_COND(_cond_wait_cancel);
5531
5532 #define CHECK_COND2(cond_op) \
5533 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
5534
5535 CHECK_COND2( cond_timedwait);
5536 CHECK_COND2(_cond_timedwait);
5537 CHECK_COND2(_cond_timedwait_cancel);
5538
5539 // do the _lwp_* versions too
5540 #define mutex_t lwp_mutex_t
5541 #define cond_t lwp_cond_t
5542 CHECK_MUTEX( _lwp_mutex_lock)
5543 CHECK_MUTEX( _lwp_mutex_unlock)
5544 CHECK_MUTEX( _lwp_mutex_trylock)
5545 CHECK_MUTEX( __lwp_mutex_lock)
5546 CHECK_MUTEX( __lwp_mutex_unlock)
5547 CHECK_MUTEX( __lwp_mutex_trylock)
5548 CHECK_MUTEX(___lwp_mutex_lock)
5549 CHECK_MUTEX(___lwp_mutex_unlock)
5550
5551 CHECK_COND( _lwp_cond_wait);
5552 CHECK_COND( __lwp_cond_wait);
5553 CHECK_COND(___lwp_cond_wait);
5554
5555 CHECK_COND2( _lwp_cond_timedwait);
5556 CHECK_COND2( __lwp_cond_timedwait);
5557 #undef mutex_t
5558 #undef cond_t
5559
5560 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5561 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5562 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5563 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5564 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5565 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5566 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5567 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5568
5569
5570 // recording machinery:
5571
5572 enum { RECORD_SYNCH_LIMIT = 200 };
5573 char* record_synch_name[RECORD_SYNCH_LIMIT];
5574 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5575 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5576 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5577 int record_synch_count = 0;
5578 bool record_synch_enabled = false;
5579
5580 // in dbx, examine recorded data this way:
5581 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5582
5583 void record_synch(char* name, bool returning) {
5584 if (record_synch_enabled) {
5585 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5586 record_synch_name[record_synch_count] = name;
5587 record_synch_returning[record_synch_count] = returning;
5588 record_synch_thread[record_synch_count] = thr_self();
5589 record_synch_arg0ptr[record_synch_count] = &name;
5590 record_synch_count++;
5591 }
5592 // put more checking code here:
5593 // ...
5594 }
5595 }
5596
5597 void record_synch_enable() {
5598 // start collecting trace data, if not already doing so
5599 if (!record_synch_enabled) record_synch_count = 0;
5600 record_synch_enabled = true;
5601 }
5602
5603 void record_synch_disable() {
5604 // stop collecting trace data
5605 record_synch_enabled = false;
5606 }
5607
5608 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5609 #endif // PRODUCT
5610
5611 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5612 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5613 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5614
5615
5616 // JVMTI & JVM monitoring and management support
5617 // The thread_cpu_time() and current_thread_cpu_time() are only
5618 // supported if is_thread_cpu_time_supported() returns true.
5619 // They are not supported on Solaris T1.
5620
5621 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5622 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5623 // of a thread.
5624 //
5625 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5626 // returns the fast estimate available on the platform.
5627
5628 // hrtime_t gethrvtime() return value includes
5629 // user time but does not include system time
5630 jlong os::current_thread_cpu_time() {
5631 return (jlong) gethrvtime();
5632 }
5633
5634 jlong os::thread_cpu_time(Thread *thread) {
5635 // return user level CPU time only to be consistent with
5636 // what current_thread_cpu_time returns.
5637 // thread_cpu_time_info() must be changed if this changes
5638 return os::thread_cpu_time(thread, false /* user time only */);
5639 }
5640
5641 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5642 if (user_sys_cpu_time) {
5643 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5644 } else {
5645 return os::current_thread_cpu_time();
5646 }
5647 }
5648
5649 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5650 char proc_name[64];
5651 int count;
5652 prusage_t prusage;
5653 jlong lwp_time;
5654 int fd;
5655
5656 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5657 getpid(),
5658 thread->osthread()->lwp_id());
5659 fd = ::open(proc_name, O_RDONLY);
5660 if ( fd == -1 ) return -1;
5661
5662 do {
5663 count = ::pread(fd,
5664 (void *)&prusage.pr_utime,
5665 thr_time_size,
5666 thr_time_off);
5667 } while (count < 0 && errno == EINTR);
5668 ::close(fd);
5669 if ( count < 0 ) return -1;
5670
5671 if (user_sys_cpu_time) {
5672 // user + system CPU time
5673 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5674 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5675 (jlong)prusage.pr_stime.tv_nsec +
5676 (jlong)prusage.pr_utime.tv_nsec;
5677 } else {
5678 // user level CPU time only
5679 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5680 (jlong)prusage.pr_utime.tv_nsec;
5681 }
5682
5683 return(lwp_time);
5684 }
5685
5686 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5687 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5688 info_ptr->may_skip_backward = false; // elapsed time not wall time
5689 info_ptr->may_skip_forward = false; // elapsed time not wall time
5690 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5691 }
5692
5693 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5694 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5695 info_ptr->may_skip_backward = false; // elapsed time not wall time
5696 info_ptr->may_skip_forward = false; // elapsed time not wall time
5697 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5698 }
5699
5700 bool os::is_thread_cpu_time_supported() {
5701 if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
5702 return true;
5703 } else {
5704 return false;
5705 }
5706 }
5707
5708 // System loadavg support. Returns -1 if load average cannot be obtained.
5709 // Return the load average for our processor set if the primitive exists
5710 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5711 int os::loadavg(double loadavg[], int nelem) {
5712 if (pset_getloadavg_ptr != NULL) {
5713 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5714 } else {
5715 return ::getloadavg(loadavg, nelem);
5716 }
5717 }
5718
5719 //---------------------------------------------------------------------------------
5720
5721 static address same_page(address x, address y) {
5722 intptr_t page_bits = -os::vm_page_size();
5723 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
5724 return x;
5725 else if (x > y)
5726 return (address)(intptr_t(y) | ~page_bits) + 1;
5727 else
5728 return (address)(intptr_t(y) & page_bits);
5729 }
5730
5731 bool os::find(address addr, outputStream* st) {
5732 Dl_info dlinfo;
5733 memset(&dlinfo, 0, sizeof(dlinfo));
5734 if (dladdr(addr, &dlinfo)) {
5735 #ifdef _LP64
5736 st->print("0x%016lx: ", addr);
5737 #else
5738 st->print("0x%08x: ", addr);
5739 #endif
5740 if (dlinfo.dli_sname != NULL)
5741 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5742 else if (dlinfo.dli_fname)
5743 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5744 else
5745 st->print("<absolute address>");
5746 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname);
5747 #ifdef _LP64
5748 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase);
5749 #else
5750 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase);
5751 #endif
5752 st->cr();
5753
5754 if (Verbose) {
5755 // decode some bytes around the PC
5756 address begin = same_page(addr-40, addr);
5757 address end = same_page(addr+40, addr);
5758 address lowest = (address) dlinfo.dli_sname;
5759 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5760 if (begin < lowest) begin = lowest;
5761 Dl_info dlinfo2;
5762 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
5763 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
5764 end = (address) dlinfo2.dli_saddr;
5765 Disassembler::decode(begin, end, st);
5766 }
5767 return true;
5768 }
5769 return false;
5770 }
5771
5772 // Following function has been added to support HotSparc's libjvm.so running
5773 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5774 // src/solaris/hpi/native_threads in the EVM codebase.
5775 //
5776 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5777 // libraries and should thus be removed. We will leave it behind for a while
5778 // until we no longer want to able to run on top of 1.3.0 Solaris production
5779 // JDK. See 4341971.
5780
5781 #define STACK_SLACK 0x800
5782
5783 extern "C" {
5784 intptr_t sysThreadAvailableStackWithSlack() {
5785 stack_t st;
5786 intptr_t retval, stack_top;
5787 retval = thr_stksegment(&st);
5788 assert(retval == 0, "incorrect return value from thr_stksegment");
5789 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5790 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5791 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5792 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5793 }
5794 }
5795
5796 // Just to get the Kernel build to link on solaris for testing.
5797
5798 extern "C" {
5799 class ASGCT_CallTrace;
5800 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext)
5801 KERNEL_RETURN;
5802 }
5803
5804
5805 // ObjectMonitor park-unpark infrastructure ...
5806 //
5807 // We implement Solaris and Linux PlatformEvents with the
5808 // obvious condvar-mutex-flag triple.
5809 // Another alternative that works quite well is pipes:
5810 // Each PlatformEvent consists of a pipe-pair.
5811 // The thread associated with the PlatformEvent
5812 // calls park(), which reads from the input end of the pipe.
5813 // Unpark() writes into the other end of the pipe.
5814 // The write-side of the pipe must be set NDELAY.
5815 // Unfortunately pipes consume a large # of handles.
5816 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5817 // Using pipes for the 1st few threads might be workable, however.
5818 //
5819 // park() is permitted to return spuriously.
5820 // Callers of park() should wrap the call to park() in
5821 // an appropriate loop. A litmus test for the correct
5822 // usage of park is the following: if park() were modified
5823 // to immediately return 0 your code should still work,
5824 // albeit degenerating to a spin loop.
5825 //
5826 // An interesting optimization for park() is to use a trylock()
5827 // to attempt to acquire the mutex. If the trylock() fails
5828 // then we know that a concurrent unpark() operation is in-progress.
5829 // in that case the park() code could simply set _count to 0
5830 // and return immediately. The subsequent park() operation *might*
5831 // return immediately. That's harmless as the caller of park() is
5832 // expected to loop. By using trylock() we will have avoided a
5833 // avoided a context switch caused by contention on the per-thread mutex.
5834 //
5835 // TODO-FIXME:
5836 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5837 // objectmonitor implementation.
5838 // 2. Collapse the JSR166 parker event, and the
5839 // objectmonitor ParkEvent into a single "Event" construct.
5840 // 3. In park() and unpark() add:
5841 // assert (Thread::current() == AssociatedWith).
5842 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5843 // 1-out-of-N park() operations will return immediately.
5844 //
5845 // _Event transitions in park()
5846 // -1 => -1 : illegal
5847 // 1 => 0 : pass - return immediately
5848 // 0 => -1 : block
5849 //
5850 // _Event serves as a restricted-range semaphore.
5851 //
5852 // Another possible encoding of _Event would be with
5853 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5854 //
5855 // TODO-FIXME: add DTRACE probes for:
5856 // 1. Tx parks
5857 // 2. Ty unparks Tx
5858 // 3. Tx resumes from park
5859
5860
5861 // value determined through experimentation
5862 #define ROUNDINGFIX 11
5863
5864 // utility to compute the abstime argument to timedwait.
5865 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5866
5867 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5868 // millis is the relative timeout time
5869 // abstime will be the absolute timeout time
5870 if (millis < 0) millis = 0;
5871 struct timeval now;
5872 int status = gettimeofday(&now, NULL);
5873 assert(status == 0, "gettimeofday");
5874 jlong seconds = millis / 1000;
5875 jlong max_wait_period;
5876
5877 if (UseLWPSynchronization) {
5878 // forward port of fix for 4275818 (not sleeping long enough)
5879 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5880 // _lwp_cond_timedwait() used a round_down algorithm rather
5881 // than a round_up. For millis less than our roundfactor
5882 // it rounded down to 0 which doesn't meet the spec.
5883 // For millis > roundfactor we may return a bit sooner, but
5884 // since we can not accurately identify the patch level and
5885 // this has already been fixed in Solaris 9 and 8 we will
5886 // leave it alone rather than always rounding down.
5887
5888 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5889 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5890 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5891 max_wait_period = 21000000;
5892 } else {
5893 max_wait_period = 50000000;
5894 }
5895 millis %= 1000;
5896 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5897 seconds = max_wait_period;
5898 }
5899 abstime->tv_sec = now.tv_sec + seconds;
5900 long usec = now.tv_usec + millis * 1000;
5901 if (usec >= 1000000) {
5902 abstime->tv_sec += 1;
5903 usec -= 1000000;
5904 }
5905 abstime->tv_nsec = usec * 1000;
5906 return abstime;
5907 }
5908
5909 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
5910 // Conceptually TryPark() should be equivalent to park(0).
5911
5912 int os::PlatformEvent::TryPark() {
5913 for (;;) {
5914 const int v = _Event ;
5915 guarantee ((v == 0) || (v == 1), "invariant") ;
5916 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
5917 }
5918 }
5919
5920 void os::PlatformEvent::park() { // AKA: down()
5921 // Invariant: Only the thread associated with the Event/PlatformEvent
5922 // may call park().
5923 int v ;
5924 for (;;) {
5925 v = _Event ;
5926 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5927 }
5928 guarantee (v >= 0, "invariant") ;
5929 if (v == 0) {
5930 // Do this the hard way by blocking ...
5931 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5932 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5933 // Only for SPARC >= V8PlusA
5934 #if defined(__sparc) && defined(COMPILER2)
5935 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5936 #endif
5937 int status = os::Solaris::mutex_lock(_mutex);
5938 assert_status(status == 0, status, "mutex_lock");
5939 guarantee (_nParked == 0, "invariant") ;
5940 ++ _nParked ;
5941 while (_Event < 0) {
5942 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5943 // Treat this the same as if the wait was interrupted
5944 // With usr/lib/lwp going to kernel, always handle ETIME
5945 status = os::Solaris::cond_wait(_cond, _mutex);
5946 if (status == ETIME) status = EINTR ;
5947 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5948 }
5949 -- _nParked ;
5950 _Event = 0 ;
5951 status = os::Solaris::mutex_unlock(_mutex);
5952 assert_status(status == 0, status, "mutex_unlock");
5953 }
5954 }
5955
5956 int os::PlatformEvent::park(jlong millis) {
5957 guarantee (_nParked == 0, "invariant") ;
5958 int v ;
5959 for (;;) {
5960 v = _Event ;
5961 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5962 }
5963 guarantee (v >= 0, "invariant") ;
5964 if (v != 0) return OS_OK ;
5965
5966 int ret = OS_TIMEOUT;
5967 timestruc_t abst;
5968 compute_abstime (&abst, millis);
5969
5970 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5971 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5972 // Only for SPARC >= V8PlusA
5973 #if defined(__sparc) && defined(COMPILER2)
5974 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5975 #endif
5976 int status = os::Solaris::mutex_lock(_mutex);
5977 assert_status(status == 0, status, "mutex_lock");
5978 guarantee (_nParked == 0, "invariant") ;
5979 ++ _nParked ;
5980 while (_Event < 0) {
5981 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5982 assert_status(status == 0 || status == EINTR ||
5983 status == ETIME || status == ETIMEDOUT,
5984 status, "cond_timedwait");
5985 if (!FilterSpuriousWakeups) break ; // previous semantics
5986 if (status == ETIME || status == ETIMEDOUT) break ;
5987 // We consume and ignore EINTR and spurious wakeups.
5988 }
5989 -- _nParked ;
5990 if (_Event >= 0) ret = OS_OK ;
5991 _Event = 0 ;
5992 status = os::Solaris::mutex_unlock(_mutex);
5993 assert_status(status == 0, status, "mutex_unlock");
5994 return ret;
5995 }
5996
5997 void os::PlatformEvent::unpark() {
5998 int v, AnyWaiters;
5999
6000 // Increment _Event.
6001 // Another acceptable implementation would be to simply swap 1
6002 // into _Event:
6003 // if (Swap (&_Event, 1) < 0) {
6004 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ;
6005 // if (AnyWaiters) cond_signal (_cond) ;
6006 // }
6007
6008 for (;;) {
6009 v = _Event ;
6010 if (v > 0) {
6011 // The LD of _Event could have reordered or be satisfied
6012 // by a read-aside from this processor's write buffer.
6013 // To avoid problems execute a barrier and then
6014 // ratify the value. A degenerate CAS() would also work.
6015 // Viz., CAS (v+0, &_Event, v) == v).
6016 OrderAccess::fence() ;
6017 if (_Event == v) return ;
6018 continue ;
6019 }
6020 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
6021 }
6022
6023 // If the thread associated with the event was parked, wake it.
6024 if (v < 0) {
6025 int status ;
6026 // Wait for the thread assoc with the PlatformEvent to vacate.
6027 status = os::Solaris::mutex_lock(_mutex);
6028 assert_status(status == 0, status, "mutex_lock");
6029 AnyWaiters = _nParked ;
6030 status = os::Solaris::mutex_unlock(_mutex);
6031 assert_status(status == 0, status, "mutex_unlock");
6032 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ;
6033 if (AnyWaiters != 0) {
6034 // We intentional signal *after* dropping the lock
6035 // to avoid a common class of futile wakeups.
6036 status = os::Solaris::cond_signal(_cond);
6037 assert_status(status == 0, status, "cond_signal");
6038 }
6039 }
6040 }
6041
6042 // JSR166
6043 // -------------------------------------------------------
6044
6045 /*
6046 * The solaris and linux implementations of park/unpark are fairly
6047 * conservative for now, but can be improved. They currently use a
6048 * mutex/condvar pair, plus _counter.
6049 * Park decrements _counter if > 0, else does a condvar wait. Unpark
6050 * sets count to 1 and signals condvar. Only one thread ever waits
6051 * on the condvar. Contention seen when trying to park implies that someone
6052 * is unparking you, so don't wait. And spurious returns are fine, so there
6053 * is no need to track notifications.
6054 */
6055
6056 #define NANOSECS_PER_SEC 1000000000
6057 #define NANOSECS_PER_MILLISEC 1000000
6058 #define MAX_SECS 100000000
6059
6060 /*
6061 * This code is common to linux and solaris and will be moved to a
6062 * common place in dolphin.
6063 *
6064 * The passed in time value is either a relative time in nanoseconds
6065 * or an absolute time in milliseconds. Either way it has to be unpacked
6066 * into suitable seconds and nanoseconds components and stored in the
6067 * given timespec structure.
6068 * Given time is a 64-bit value and the time_t used in the timespec is only
6069 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
6070 * overflow if times way in the future are given. Further on Solaris versions
6071 * prior to 10 there is a restriction (see cond_timedwait) that the specified
6072 * number of seconds, in abstime, is less than current_time + 100,000,000.
6073 * As it will be 28 years before "now + 100000000" will overflow we can
6074 * ignore overflow and just impose a hard-limit on seconds using the value
6075 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
6076 * years from "now".
6077 */
6078 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
6079 assert (time > 0, "convertTime");
6080
6081 struct timeval now;
6082 int status = gettimeofday(&now, NULL);
6083 assert(status == 0, "gettimeofday");
6084
6085 time_t max_secs = now.tv_sec + MAX_SECS;
6086
6087 if (isAbsolute) {
6088 jlong secs = time / 1000;
6089 if (secs > max_secs) {
6090 absTime->tv_sec = max_secs;
6091 }
6092 else {
6093 absTime->tv_sec = secs;
6094 }
6095 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
6096 }
6097 else {
6098 jlong secs = time / NANOSECS_PER_SEC;
6099 if (secs >= MAX_SECS) {
6100 absTime->tv_sec = max_secs;
6101 absTime->tv_nsec = 0;
6102 }
6103 else {
6104 absTime->tv_sec = now.tv_sec + secs;
6105 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
6106 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
6107 absTime->tv_nsec -= NANOSECS_PER_SEC;
6108 ++absTime->tv_sec; // note: this must be <= max_secs
6109 }
6110 }
6111 }
6112 assert(absTime->tv_sec >= 0, "tv_sec < 0");
6113 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
6114 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
6115 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
6116 }
6117
6118 void Parker::park(bool isAbsolute, jlong time) {
6119
6120 // Optional fast-path check:
6121 // Return immediately if a permit is available.
6122 if (_counter > 0) {
6123 _counter = 0 ;
6124 OrderAccess::fence();
6125 return ;
6126 }
6127
6128 // Optional fast-exit: Check interrupt before trying to wait
6129 Thread* thread = Thread::current();
6130 assert(thread->is_Java_thread(), "Must be JavaThread");
6131 JavaThread *jt = (JavaThread *)thread;
6132 if (Thread::is_interrupted(thread, false)) {
6133 return;
6134 }
6135
6136 // First, demultiplex/decode time arguments
6137 timespec absTime;
6138 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
6139 return;
6140 }
6141 if (time > 0) {
6142 // Warning: this code might be exposed to the old Solaris time
6143 // round-down bugs. Grep "roundingFix" for details.
6144 unpackTime(&absTime, isAbsolute, time);
6145 }
6146
6147 // Enter safepoint region
6148 // Beware of deadlocks such as 6317397.
6149 // The per-thread Parker:: _mutex is a classic leaf-lock.
6150 // In particular a thread must never block on the Threads_lock while
6151 // holding the Parker:: mutex. If safepoints are pending both the
6152 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
6153 ThreadBlockInVM tbivm(jt);
6154
6155 // Don't wait if cannot get lock since interference arises from
6156 // unblocking. Also. check interrupt before trying wait
6157 if (Thread::is_interrupted(thread, false) ||
6158 os::Solaris::mutex_trylock(_mutex) != 0) {
6159 return;
6160 }
6161
6162 int status ;
6163
6164 if (_counter > 0) { // no wait needed
6165 _counter = 0;
6166 status = os::Solaris::mutex_unlock(_mutex);
6167 assert (status == 0, "invariant") ;
6168 OrderAccess::fence();
6169 return;
6170 }
6171
6172 #ifdef ASSERT
6173 // Don't catch signals while blocked; let the running threads have the signals.
6174 // (This allows a debugger to break into the running thread.)
6175 sigset_t oldsigs;
6176 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
6177 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
6178 #endif
6179
6180 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
6181 jt->set_suspend_equivalent();
6182 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
6183
6184 // Do this the hard way by blocking ...
6185 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6186 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6187 // Only for SPARC >= V8PlusA
6188 #if defined(__sparc) && defined(COMPILER2)
6189 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6190 #endif
6191
6192 if (time == 0) {
6193 status = os::Solaris::cond_wait (_cond, _mutex) ;
6194 } else {
6195 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
6196 }
6197 // Note that an untimed cond_wait() can sometimes return ETIME on older
6198 // versions of the Solaris.
6199 assert_status(status == 0 || status == EINTR ||
6200 status == ETIME || status == ETIMEDOUT,
6201 status, "cond_timedwait");
6202
6203 #ifdef ASSERT
6204 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
6205 #endif
6206 _counter = 0 ;
6207 status = os::Solaris::mutex_unlock(_mutex);
6208 assert_status(status == 0, status, "mutex_unlock") ;
6209
6210 // If externally suspended while waiting, re-suspend
6211 if (jt->handle_special_suspend_equivalent_condition()) {
6212 jt->java_suspend_self();
6213 }
6214 OrderAccess::fence();
6215 }
6216
6217 void Parker::unpark() {
6218 int s, status ;
6219 status = os::Solaris::mutex_lock (_mutex) ;
6220 assert (status == 0, "invariant") ;
6221 s = _counter;
6222 _counter = 1;
6223 status = os::Solaris::mutex_unlock (_mutex) ;
6224 assert (status == 0, "invariant") ;
6225
6226 if (s < 1) {
6227 status = os::Solaris::cond_signal (_cond) ;
6228 assert (status == 0, "invariant") ;
6229 }
6230 }
6231
6232 extern char** environ;
6233
6234 // Run the specified command in a separate process. Return its exit value,
6235 // or -1 on failure (e.g. can't fork a new process).
6236 // Unlike system(), this function can be called from signal handler. It
6237 // doesn't block SIGINT et al.
6238 int os::fork_and_exec(char* cmd) {
6239 char * argv[4];
6240 argv[0] = (char *)"sh";
6241 argv[1] = (char *)"-c";
6242 argv[2] = cmd;
6243 argv[3] = NULL;
6244
6245 // fork is async-safe, fork1 is not so can't use in signal handler
6246 pid_t pid;
6247 Thread* t = ThreadLocalStorage::get_thread_slow();
6248 if (t != NULL && t->is_inside_signal_handler()) {
6249 pid = fork();
6250 } else {
6251 pid = fork1();
6252 }
6253
6254 if (pid < 0) {
6255 // fork failed
6256 warning("fork failed: %s", strerror(errno));
6257 return -1;
6258
6259 } else if (pid == 0) {
6260 // child process
6261
6262 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
6263 execve("/usr/bin/sh", argv, environ);
6264
6265 // execve failed
6266 _exit(-1);
6267
6268 } else {
6269 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
6270 // care about the actual exit code, for now.
6271
6272 int status;
6273
6274 // Wait for the child process to exit. This returns immediately if
6275 // the child has already exited. */
6276 while (waitpid(pid, &status, 0) < 0) {
6277 switch (errno) {
6278 case ECHILD: return 0;
6279 case EINTR: break;
6280 default: return -1;
6281 }
6282 }
6283
6284 if (WIFEXITED(status)) {
6285 // The child exited normally; get its exit code.
6286 return WEXITSTATUS(status);
6287 } else if (WIFSIGNALED(status)) {
6288 // The child exited because of a signal
6289 // The best value to return is 0x80 + signal number,
6290 // because that is what all Unix shells do, and because
6291 // it allows callers to distinguish between process exit and
6292 // process death by signal.
6293 return 0x80 + WTERMSIG(status);
6294 } else {
6295 // Unknown exit code; pass it through
6296 return status;
6297 }
6298 }
6299 }
6300
6301 // is_headless_jre()
6302 //
6303 // Test for the existence of libmawt in motif21 or xawt directories
6304 // in order to report if we are running in a headless jre
6305 //
6306 bool os::is_headless_jre() {
6307 struct stat statbuf;
6308 char buf[MAXPATHLEN];
6309 char libmawtpath[MAXPATHLEN];
6310 const char *xawtstr = "/xawt/libmawt.so";
6311 const char *motifstr = "/motif21/libmawt.so";
6312 char *p;
6313
6314 // Get path to libjvm.so
6315 os::jvm_path(buf, sizeof(buf));
6316
6317 // Get rid of libjvm.so
6318 p = strrchr(buf, '/');
6319 if (p == NULL) return false;
6320 else *p = '\0';
6321
6322 // Get rid of client or server
6323 p = strrchr(buf, '/');
6324 if (p == NULL) return false;
6325 else *p = '\0';
6326
6327 // check xawt/libmawt.so
6328 strcpy(libmawtpath, buf);
6329 strcat(libmawtpath, xawtstr);
6330 if (::stat(libmawtpath, &statbuf) == 0) return false;
6331
6332 // check motif21/libmawt.so
6333 strcpy(libmawtpath, buf);
6334 strcat(libmawtpath, motifstr);
6335 if (::stat(libmawtpath, &statbuf) == 0) return false;
6336
6337 return true;
6338 }
6339
6340 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
6341 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted);
6342 }
6343
6344 int os::close(int fd) {
6345 RESTARTABLE_RETURN_INT(::close(fd));
6346 }
6347
6348 int os::socket_close(int fd) {
6349 RESTARTABLE_RETURN_INT(::close(fd));
6350 }
6351
6352 int os::recv(int fd, char *buf, int nBytes, int flags) {
6353 INTERRUPTIBLE_RETURN_INT(::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6354 }
6355
6356
6357 int os::send(int fd, char *buf, int nBytes, int flags) {
6358 INTERRUPTIBLE_RETURN_INT(::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6359 }
6360
6361 int os::raw_send(int fd, char *buf, int nBytes, int flags) {
6362 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
6363 }
6364
6365 // As both poll and select can be interrupted by signals, we have to be
6366 // prepared to restart the system call after updating the timeout, unless
6367 // a poll() is done with timeout == -1, in which case we repeat with this
6368 // "wait forever" value.
6369
6370 int os::timeout(int fd, long timeout) {
6371 int res;
6372 struct timeval t;
6373 julong prevtime, newtime;
6374 static const char* aNull = 0;
6375 struct pollfd pfd;
6376 pfd.fd = fd;
6377 pfd.events = POLLIN;
6378
6379 gettimeofday(&t, &aNull);
6380 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
6381
6382 for(;;) {
6383 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted);
6384 if(res == OS_ERR && errno == EINTR) {
6385 if(timeout != -1) {
6386 gettimeofday(&t, &aNull);
6387 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000;
6388 timeout -= newtime - prevtime;
6389 if(timeout <= 0)
6390 return OS_OK;
6391 prevtime = newtime;
6392 }
6393 } else return res;
6394 }
6395 }
6396
6397 int os::connect(int fd, struct sockaddr *him, int len) {
6398 int _result;
6399 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,
6400 os::Solaris::clear_interrupted);
6401
6402 // Depending on when thread interruption is reset, _result could be
6403 // one of two values when errno == EINTR
6404
6405 if (((_result == OS_INTRPT) || (_result == OS_ERR))
6406 && (errno == EINTR)) {
6407 /* restarting a connect() changes its errno semantics */
6408 INTERRUPTIBLE(::connect(fd, him, len), _result,
6409 os::Solaris::clear_interrupted);
6410 /* undo these changes */
6411 if (_result == OS_ERR) {
6412 if (errno == EALREADY) {
6413 errno = EINPROGRESS; /* fall through */
6414 } else if (errno == EISCONN) {
6415 errno = 0;
6416 return OS_OK;
6417 }
6418 }
6419 }
6420 return _result;
6421 }
6422
6423 int os::accept(int fd, struct sockaddr *him, int *len) {
6424 if (fd < 0)
6425 return OS_ERR;
6426 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him,\
6427 (socklen_t*) len), os::Solaris::clear_interrupted);
6428 }
6429
6430 int os::recvfrom(int fd, char *buf, int nBytes, int flags,
6431 sockaddr *from, int *fromlen) {
6432 //%%note jvm_r11
6433 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes,\
6434 flags, from, fromlen), os::Solaris::clear_interrupted);
6435 }
6436
6437 int os::sendto(int fd, char *buf, int len, int flags,
6438 struct sockaddr *to, int tolen) {
6439 //%%note jvm_r11
6440 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags,\
6441 to, tolen), os::Solaris::clear_interrupted);
6442 }
6443
6444 int os::socket_available(int fd, jint *pbytes) {
6445 if (fd < 0)
6446 return OS_OK;
6447
6448 int ret;
6449
6450 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
6451
6452 //%% note ioctl can return 0 when successful, JVM_SocketAvailable
6453 // is expected to return 0 on failure and 1 on success to the jdk.
6454
6455 return (ret == OS_ERR) ? 0 : 1;
6456 }
6457
6458
6459 int os::bind(int fd, struct sockaddr *him, int len) {
6460 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\
6461 os::Solaris::clear_interrupted);
6462 }