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 return
2781 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2782 }
2783
2784 bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2785 bool exec) {
2786 if (commit_memory(addr, bytes, exec)) {
2787 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) {
2788 // If the large page size has been set and the VM
2789 // is using large pages, use the large page size
2790 // if it is smaller than the alignment hint. This is
2791 // a case where the VM wants to use a larger alignment size
2792 // for its own reasons but still want to use large pages
2793 // (which is what matters to setting the mpss range.
2794 size_t page_size = 0;
2795 if (large_page_size() < alignment_hint) {
2796 assert(UseLargePages, "Expected to be here for large page use only");
2797 page_size = large_page_size();
2798 } else {
2799 // If the alignment hint is less than the large page
2800 // size, the VM wants a particular alignment (thus the hint)
2801 // for internal reasons. Try to set the mpss range using
2802 // the alignment_hint.
2803 page_size = alignment_hint;
2804 }
2805 // Since this is a hint, ignore any failures.
2806 (void)Solaris::set_mpss_range(addr, bytes, page_size);
2807 }
2808 return true;
2809 }
2810 return false;
2811 }
2812
2813 // Uncommit the pages in a specified region.
2814 void os::free_memory(char* addr, size_t bytes) {
2815 if (madvise(addr, bytes, MADV_FREE) < 0) {
2816 debug_only(warning("MADV_FREE failed."));
2817 return;
2818 }
2819 }
2820
2821 bool os::create_stack_guard_pages(char* addr, size_t size) {
2822 return os::commit_memory(addr, size);
2823 }
2824
2825 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2826 return os::uncommit_memory(addr, size);
2827 }
2828
2829 // Change the page size in a given range.
2830 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2831 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2832 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2833 if (UseLargePages && UseMPSS) {
2834 Solaris::set_mpss_range(addr, bytes, alignment_hint);
2835 }
2836 }
2837
2838 // Tell the OS to make the range local to the first-touching LWP
2839 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2840 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2841 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2842 debug_only(warning("MADV_ACCESS_LWP failed."));
2843 }
2844 }
2845
2846 // Tell the OS that this range would be accessed from different LWPs.
2847 void os::numa_make_global(char *addr, size_t bytes) {
2848 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2849 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2850 debug_only(warning("MADV_ACCESS_MANY failed."));
2851 }
2852 }
2853
2854 // Get the number of the locality groups.
2855 size_t os::numa_get_groups_num() {
2856 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2857 return n != -1 ? n : 1;
2858 }
2859
2860 // Get a list of leaf locality groups. A leaf lgroup is group that
2861 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2862 // board. An LWP is assigned to one of these groups upon creation.
2863 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2864 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2865 ids[0] = 0;
2866 return 1;
2867 }
2868 int result_size = 0, top = 1, bottom = 0, cur = 0;
2869 for (int k = 0; k < size; k++) {
2870 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2871 (Solaris::lgrp_id_t*)&ids[top], size - top);
2872 if (r == -1) {
2873 ids[0] = 0;
2874 return 1;
2875 }
2876 if (!r) {
2877 // That's a leaf node.
2878 assert (bottom <= cur, "Sanity check");
2879 // Check if the node has memory
2880 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2881 NULL, 0, LGRP_RSRC_MEM) > 0) {
2882 ids[bottom++] = ids[cur];
2883 }
2884 }
2885 top += r;
2886 cur++;
2887 }
2888 if (bottom == 0) {
2889 // Handle a situation, when the OS reports no memory available.
2890 // Assume UMA architecture.
2891 ids[0] = 0;
2892 return 1;
2893 }
2894 return bottom;
2895 }
2896
2897 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2898 bool os::numa_topology_changed() {
2899 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2900 if (is_stale != -1 && is_stale) {
2901 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2902 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2903 assert(c != 0, "Failure to initialize LGRP API");
2904 Solaris::set_lgrp_cookie(c);
2905 return true;
2906 }
2907 return false;
2908 }
2909
2910 // Get the group id of the current LWP.
2911 int os::numa_get_group_id() {
2912 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2913 if (lgrp_id == -1) {
2914 return 0;
2915 }
2916 const int size = os::numa_get_groups_num();
2917 int *ids = (int*)alloca(size * sizeof(int));
2918
2919 // Get the ids of all lgroups with memory; r is the count.
2920 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2921 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2922 if (r <= 0) {
2923 return 0;
2924 }
2925 return ids[os::random() % r];
2926 }
2927
2928 // Request information about the page.
2929 bool os::get_page_info(char *start, page_info* info) {
2930 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2931 uint64_t addr = (uintptr_t)start;
2932 uint64_t outdata[2];
2933 uint_t validity = 0;
2934
2935 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2936 return false;
2937 }
2938
2939 info->size = 0;
2940 info->lgrp_id = -1;
2941
2942 if ((validity & 1) != 0) {
2943 if ((validity & 2) != 0) {
2944 info->lgrp_id = outdata[0];
2945 }
2946 if ((validity & 4) != 0) {
2947 info->size = outdata[1];
2948 }
2949 return true;
2950 }
2951 return false;
2952 }
2953
2954 // Scan the pages from start to end until a page different than
2955 // the one described in the info parameter is encountered.
2956 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
2957 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2958 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2959 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT];
2960 uint_t validity[MAX_MEMINFO_CNT];
2961
2962 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2963 uint64_t p = (uint64_t)start;
2964 while (p < (uint64_t)end) {
2965 addrs[0] = p;
2966 size_t addrs_count = 1;
2967 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) {
2968 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2969 addrs_count++;
2970 }
2971
2972 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2973 return NULL;
2974 }
2975
2976 size_t i = 0;
2977 for (; i < addrs_count; i++) {
2978 if ((validity[i] & 1) != 0) {
2979 if ((validity[i] & 4) != 0) {
2980 if (outdata[types * i + 1] != page_expected->size) {
2981 break;
2982 }
2983 } else
2984 if (page_expected->size != 0) {
2985 break;
2986 }
2987
2988 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2989 if (outdata[types * i] != page_expected->lgrp_id) {
2990 break;
2991 }
2992 }
2993 } else {
2994 return NULL;
2995 }
2996 }
2997
2998 if (i != addrs_count) {
2999 if ((validity[i] & 2) != 0) {
3000 page_found->lgrp_id = outdata[types * i];
3001 } else {
3002 page_found->lgrp_id = -1;
3003 }
3004 if ((validity[i] & 4) != 0) {
3005 page_found->size = outdata[types * i + 1];
3006 } else {
3007 page_found->size = 0;
3008 }
3009 return (char*)addrs[i];
3010 }
3011
3012 p = addrs[addrs_count - 1] + page_size;
3013 }
3014 return end;
3015 }
3016
3017 bool os::uncommit_memory(char* addr, size_t bytes) {
3018 size_t size = bytes;
3019 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3020 // uncommitted page. Otherwise, the read/write might succeed if we
3021 // have enough swap space to back the physical page.
3022 return
3023 NULL != Solaris::mmap_chunk(addr, size,
3024 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
3025 PROT_NONE);
3026 }
3027
3028 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
3029 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
3030
3031 if (b == MAP_FAILED) {
3032 return NULL;
3033 }
3034 return b;
3035 }
3036
3037 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) {
3038 char* addr = requested_addr;
3039 int flags = MAP_PRIVATE | MAP_NORESERVE;
3040
3041 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap");
3042
3043 if (fixed) {
3044 flags |= MAP_FIXED;
3045 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
3046 flags |= MAP_ALIGN;
3047 addr = (char*) alignment_hint;
3048 }
3049
3050 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3051 // uncommitted page. Otherwise, the read/write might succeed if we
3052 // have enough swap space to back the physical page.
3053 return mmap_chunk(addr, bytes, flags, PROT_NONE);
3054 }
3055
3056 char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
3057 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL));
3058
3059 guarantee(requested_addr == NULL || requested_addr == addr,
3060 "OS failed to return requested mmap address.");
3061 return addr;
3062 }
3063
3064 // Reserve memory at an arbitrary address, only if that area is
3065 // available (and not reserved for something else).
3066
3067 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
3068 const int max_tries = 10;
3069 char* base[max_tries];
3070 size_t size[max_tries];
3071
3072 // Solaris adds a gap between mmap'ed regions. The size of the gap
3073 // is dependent on the requested size and the MMU. Our initial gap
3074 // value here is just a guess and will be corrected later.
3075 bool had_top_overlap = false;
3076 bool have_adjusted_gap = false;
3077 size_t gap = 0x400000;
3078
3079 // Assert only that the size is a multiple of the page size, since
3080 // that's all that mmap requires, and since that's all we really know
3081 // about at this low abstraction level. If we need higher alignment,
3082 // we can either pass an alignment to this method or verify alignment
3083 // in one of the methods further up the call chain. See bug 5044738.
3084 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
3085
3086 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
3087 // Give it a try, if the kernel honors the hint we can return immediately.
3088 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
3089 volatile int err = errno;
3090 if (addr == requested_addr) {
3091 return addr;
3092 } else if (addr != NULL) {
3093 unmap_memory(addr, bytes);
3094 }
3095
3096 if (PrintMiscellaneous && Verbose) {
3097 char buf[256];
3098 buf[0] = '\0';
3099 if (addr == NULL) {
3100 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
3101 }
3102 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
3103 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
3104 "%s", bytes, requested_addr, addr, buf);
3105 }
3106
3107 // Address hint method didn't work. Fall back to the old method.
3108 // In theory, once SNV becomes our oldest supported platform, this
3109 // code will no longer be needed.
3110 //
3111 // Repeatedly allocate blocks until the block is allocated at the
3112 // right spot. Give up after max_tries.
3113 int i;
3114 for (i = 0; i < max_tries; ++i) {
3115 base[i] = reserve_memory(bytes);
3116
3117 if (base[i] != NULL) {
3118 // Is this the block we wanted?
3119 if (base[i] == requested_addr) {
3120 size[i] = bytes;
3121 break;
3122 }
3123
3124 // check that the gap value is right
3125 if (had_top_overlap && !have_adjusted_gap) {
3126 size_t actual_gap = base[i-1] - base[i] - bytes;
3127 if (gap != actual_gap) {
3128 // adjust the gap value and retry the last 2 allocations
3129 assert(i > 0, "gap adjustment code problem");
3130 have_adjusted_gap = true; // adjust the gap only once, just in case
3131 gap = actual_gap;
3132 if (PrintMiscellaneous && Verbose) {
3133 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
3134 }
3135 unmap_memory(base[i], bytes);
3136 unmap_memory(base[i-1], size[i-1]);
3137 i-=2;
3138 continue;
3139 }
3140 }
3141
3142 // Does this overlap the block we wanted? Give back the overlapped
3143 // parts and try again.
3144 //
3145 // There is still a bug in this code: if top_overlap == bytes,
3146 // the overlap is offset from requested region by the value of gap.
3147 // In this case giving back the overlapped part will not work,
3148 // because we'll give back the entire block at base[i] and
3149 // therefore the subsequent allocation will not generate a new gap.
3150 // This could be fixed with a new algorithm that used larger
3151 // or variable size chunks to find the requested region -
3152 // but such a change would introduce additional complications.
3153 // It's rare enough that the planets align for this bug,
3154 // so we'll just wait for a fix for 6204603/5003415 which
3155 // will provide a mmap flag to allow us to avoid this business.
3156
3157 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
3158 if (top_overlap >= 0 && top_overlap < bytes) {
3159 had_top_overlap = true;
3160 unmap_memory(base[i], top_overlap);
3161 base[i] += top_overlap;
3162 size[i] = bytes - top_overlap;
3163 } else {
3164 size_t bottom_overlap = base[i] + bytes - requested_addr;
3165 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
3166 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
3167 warning("attempt_reserve_memory_at: possible alignment bug");
3168 }
3169 unmap_memory(requested_addr, bottom_overlap);
3170 size[i] = bytes - bottom_overlap;
3171 } else {
3172 size[i] = bytes;
3173 }
3174 }
3175 }
3176 }
3177
3178 // Give back the unused reserved pieces.
3179
3180 for (int j = 0; j < i; ++j) {
3181 if (base[j] != NULL) {
3182 unmap_memory(base[j], size[j]);
3183 }
3184 }
3185
3186 return (i < max_tries) ? requested_addr : NULL;
3187 }
3188
3189 bool os::release_memory(char* addr, size_t bytes) {
3190 size_t size = bytes;
3191 return munmap(addr, size) == 0;
3192 }
3193
3194 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
3195 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
3196 "addr must be page aligned");
3197 int retVal = mprotect(addr, bytes, prot);
3198 return retVal == 0;
3199 }
3200
3201 // Protect memory (Used to pass readonly pages through
3202 // JNI GetArray<type>Elements with empty arrays.)
3203 // Also, used for serialization page and for compressed oops null pointer
3204 // checking.
3205 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3206 bool is_committed) {
3207 unsigned int p = 0;
3208 switch (prot) {
3209 case MEM_PROT_NONE: p = PROT_NONE; break;
3210 case MEM_PROT_READ: p = PROT_READ; break;
3211 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3212 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3213 default:
3214 ShouldNotReachHere();
3215 }
3216 // is_committed is unused.
3217 return solaris_mprotect(addr, bytes, p);
3218 }
3219
3220 // guard_memory and unguard_memory only happens within stack guard pages.
3221 // Since ISM pertains only to the heap, guard and unguard memory should not
3222 /// happen with an ISM region.
3223 bool os::guard_memory(char* addr, size_t bytes) {
3224 return solaris_mprotect(addr, bytes, PROT_NONE);
3225 }
3226
3227 bool os::unguard_memory(char* addr, size_t bytes) {
3228 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3229 }
3230
3231 // Large page support
3232
3233 // UseLargePages is the master flag to enable/disable large page memory.
3234 // UseMPSS and UseISM are supported for compatibility reasons. Their combined
3235 // effects can be described in the following table:
3236 //
3237 // UseLargePages UseMPSS UseISM
3238 // false * * => UseLargePages is the master switch, turning
3239 // it off will turn off both UseMPSS and
3240 // UseISM. VM will not use large page memory
3241 // regardless the settings of UseMPSS/UseISM.
3242 // true false false => Unless future Solaris provides other
3243 // mechanism to use large page memory, this
3244 // combination is equivalent to -UseLargePages,
3245 // VM will not use large page memory
3246 // true true false => JVM will use MPSS for large page memory.
3247 // This is the default behavior.
3248 // true false true => JVM will use ISM for large page memory.
3249 // true true true => JVM will use ISM if it is available.
3250 // Otherwise, JVM will fall back to MPSS.
3251 // Becaues ISM is now available on all
3252 // supported Solaris versions, this combination
3253 // is equivalent to +UseISM -UseMPSS.
3254
3255 static size_t _large_page_size = 0;
3256
3257 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) {
3258 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address
3259 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc
3260 // can support multiple page sizes.
3261
3262 // Don't bother to probe page size because getpagesizes() comes with MPSS.
3263 // ISM is only recommended on old Solaris where there is no MPSS support.
3264 // Simply choose a conservative value as default.
3265 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes :
3266 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M)
3267 ARM_ONLY(2 * M);
3268
3269 // ISM is available on all supported Solaris versions
3270 return true;
3271 }
3272
3273 // Insertion sort for small arrays (descending order).
3274 static void insertion_sort_descending(size_t* array, int len) {
3275 for (int i = 0; i < len; i++) {
3276 size_t val = array[i];
3277 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3278 size_t tmp = array[key];
3279 array[key] = array[key - 1];
3280 array[key - 1] = tmp;
3281 }
3282 }
3283 }
3284
3285 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
3286 const unsigned int usable_count = VM_Version::page_size_count();
3287 if (usable_count == 1) {
3288 return false;
3289 }
3290
3291 // Find the right getpagesizes interface. When solaris 11 is the minimum
3292 // build platform, getpagesizes() (without the '2') can be called directly.
3293 typedef int (*gps_t)(size_t[], int);
3294 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3295 if (gps_func == NULL) {
3296 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3297 if (gps_func == NULL) {
3298 if (warn) {
3299 warning("MPSS is not supported by the operating system.");
3300 }
3301 return false;
3302 }
3303 }
3304
3305 // Fill the array of page sizes.
3306 int n = (*gps_func)(_page_sizes, page_sizes_max);
3307 assert(n > 0, "Solaris bug?");
3308
3309 if (n == page_sizes_max) {
3310 // Add a sentinel value (necessary only if the array was completely filled
3311 // since it is static (zeroed at initialization)).
3312 _page_sizes[--n] = 0;
3313 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3314 }
3315 assert(_page_sizes[n] == 0, "missing sentinel");
3316 trace_page_sizes("available page sizes", _page_sizes, n);
3317
3318 if (n == 1) return false; // Only one page size available.
3319
3320 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3321 // select up to usable_count elements. First sort the array, find the first
3322 // acceptable value, then copy the usable sizes to the top of the array and
3323 // trim the rest. Make sure to include the default page size :-).
3324 //
3325 // A better policy could get rid of the 4M limit by taking the sizes of the
3326 // important VM memory regions (java heap and possibly the code cache) into
3327 // account.
3328 insertion_sort_descending(_page_sizes, n);
3329 const size_t size_limit =
3330 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3331 int beg;
3332 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
3333 const int end = MIN2((int)usable_count, n) - 1;
3334 for (int cur = 0; cur < end; ++cur, ++beg) {
3335 _page_sizes[cur] = _page_sizes[beg];
3336 }
3337 _page_sizes[end] = vm_page_size();
3338 _page_sizes[end + 1] = 0;
3339
3340 if (_page_sizes[end] > _page_sizes[end - 1]) {
3341 // Default page size is not the smallest; sort again.
3342 insertion_sort_descending(_page_sizes, end + 1);
3343 }
3344 *page_size = _page_sizes[0];
3345
3346 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3347 return true;
3348 }
3349
3350 void os::large_page_init() {
3351 if (!UseLargePages) {
3352 UseISM = false;
3353 UseMPSS = false;
3354 return;
3355 }
3356
3357 // print a warning if any large page related flag is specified on command line
3358 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3359 !FLAG_IS_DEFAULT(UseISM) ||
3360 !FLAG_IS_DEFAULT(UseMPSS) ||
3361 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3362 UseISM = UseISM &&
3363 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size);
3364 if (UseISM) {
3365 // ISM disables MPSS to be compatible with old JDK behavior
3366 UseMPSS = false;
3367 _page_sizes[0] = _large_page_size;
3368 _page_sizes[1] = vm_page_size();
3369 }
3370
3371 UseMPSS = UseMPSS &&
3372 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3373
3374 UseLargePages = UseISM || UseMPSS;
3375 }
3376
3377 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) {
3378 // Signal to OS that we want large pages for addresses
3379 // from addr, addr + bytes
3380 struct memcntl_mha mpss_struct;
3381 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3382 mpss_struct.mha_pagesize = align;
3383 mpss_struct.mha_flags = 0;
3384 if (memcntl(start, bytes, MC_HAT_ADVISE,
3385 (caddr_t) &mpss_struct, 0, 0) < 0) {
3386 debug_only(warning("Attempt to use MPSS failed."));
3387 return false;
3388 }
3389 return true;
3390 }
3391
3392 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) {
3393 // "exec" is passed in but not used. Creating the shared image for
3394 // the code cache doesn't have an SHM_X executable permission to check.
3395 assert(UseLargePages && UseISM, "only for ISM large pages");
3396
3397 size_t size = bytes;
3398 char* retAddr = NULL;
3399 int shmid;
3400 key_t ismKey;
3401
3402 bool warn_on_failure = UseISM &&
3403 (!FLAG_IS_DEFAULT(UseLargePages) ||
3404 !FLAG_IS_DEFAULT(UseISM) ||
3405 !FLAG_IS_DEFAULT(LargePageSizeInBytes)
3406 );
3407 char msg[128];
3408
3409 ismKey = IPC_PRIVATE;
3410
3411 // Create a large shared memory region to attach to based on size.
3412 // Currently, size is the total size of the heap
3413 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT);
3414 if (shmid == -1){
3415 if (warn_on_failure) {
3416 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
3417 warning(msg);
3418 }
3419 return NULL;
3420 }
3421
3422 // Attach to the region
3423 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W);
3424 int err = errno;
3425
3426 // Remove shmid. If shmat() is successful, the actual shared memory segment
3427 // will be deleted when it's detached by shmdt() or when the process
3428 // terminates. If shmat() is not successful this will remove the shared
3429 // segment immediately.
3430 shmctl(shmid, IPC_RMID, NULL);
3431
3432 if (retAddr == (char *) -1) {
3433 if (warn_on_failure) {
3434 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
3435 warning(msg);
3436 }
3437 return NULL;
3438 }
3439
3440 return retAddr;
3441 }
3442
3443 bool os::release_memory_special(char* base, size_t bytes) {
3444 // detaching the SHM segment will also delete it, see reserve_memory_special()
3445 int rslt = shmdt(base);
3446 return rslt == 0;
3447 }
3448
3449 size_t os::large_page_size() {
3450 return _large_page_size;
3451 }
3452
3453 // MPSS allows application to commit large page memory on demand; with ISM
3454 // the entire memory region must be allocated as shared memory.
3455 bool os::can_commit_large_page_memory() {
3456 return UseISM ? false : true;
3457 }
3458
3459 bool os::can_execute_large_page_memory() {
3460 return UseISM ? false : true;
3461 }
3462
3463 static int os_sleep(jlong millis, bool interruptible) {
3464 const jlong limit = INT_MAX;
3465 jlong prevtime;
3466 int res;
3467
3468 while (millis > limit) {
3469 if ((res = os_sleep(limit, interruptible)) != OS_OK)
3470 return res;
3471 millis -= limit;
3472 }
3473
3474 // Restart interrupted polls with new parameters until the proper delay
3475 // has been completed.
3476
3477 prevtime = getTimeMillis();
3478
3479 while (millis > 0) {
3480 jlong newtime;
3481
3482 if (!interruptible) {
3483 // Following assert fails for os::yield_all:
3484 // assert(!thread->is_Java_thread(), "must not be java thread");
3485 res = poll(NULL, 0, millis);
3486 } else {
3487 JavaThread *jt = JavaThread::current();
3488
3489 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt,
3490 os::Solaris::clear_interrupted);
3491 }
3492
3493 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for
3494 // thread.Interrupt.
3495
3496 // See c/r 6751923. Poll can return 0 before time
3497 // has elapsed if time is set via clock_settime (as NTP does).
3498 // res == 0 if poll timed out (see man poll RETURN VALUES)
3499 // using the logic below checks that we really did
3500 // sleep at least "millis" if not we'll sleep again.
3501 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) {
3502 newtime = getTimeMillis();
3503 assert(newtime >= prevtime, "time moving backwards");
3504 /* Doing prevtime and newtime in microseconds doesn't help precision,
3505 and trying to round up to avoid lost milliseconds can result in a
3506 too-short delay. */
3507 millis -= newtime - prevtime;
3508 if(millis <= 0)
3509 return OS_OK;
3510 prevtime = newtime;
3511 } else
3512 return res;
3513 }
3514
3515 return OS_OK;
3516 }
3517
3518 // Read calls from inside the vm need to perform state transitions
3519 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3520 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3521 }
3522
3523 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3524 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3525 }
3526
3527 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
3528 assert(thread == Thread::current(), "thread consistency check");
3529
3530 // TODO-FIXME: this should be removed.
3531 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock
3532 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate
3533 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving
3534 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel
3535 // is fooled into believing that the system is making progress. In the code below we block the
3536 // the watcher thread while safepoint is in progress so that it would not appear as though the
3537 // system is making progress.
3538 if (!Solaris::T2_libthread() &&
3539 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) {
3540 // We now try to acquire the threads lock. Since this lock is held by the VM thread during
3541 // the entire safepoint, the watcher thread will line up here during the safepoint.
3542 Threads_lock->lock_without_safepoint_check();
3543 Threads_lock->unlock();
3544 }
3545
3546 if (thread->is_Java_thread()) {
3547 // This is a JavaThread so we honor the _thread_blocked protocol
3548 // even for sleeps of 0 milliseconds. This was originally done
3549 // as a workaround for bug 4338139. However, now we also do it
3550 // to honor the suspend-equivalent protocol.
3551
3552 JavaThread *jt = (JavaThread *) thread;
3553 ThreadBlockInVM tbivm(jt);
3554
3555 jt->set_suspend_equivalent();
3556 // cleared by handle_special_suspend_equivalent_condition() or
3557 // java_suspend_self() via check_and_wait_while_suspended()
3558
3559 int ret_code;
3560 if (millis <= 0) {
3561 thr_yield();
3562 ret_code = 0;
3563 } else {
3564 // The original sleep() implementation did not create an
3565 // OSThreadWaitState helper for sleeps of 0 milliseconds.
3566 // I'm preserving that decision for now.
3567 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
3568
3569 ret_code = os_sleep(millis, interruptible);
3570 }
3571
3572 // were we externally suspended while we were waiting?
3573 jt->check_and_wait_while_suspended();
3574
3575 return ret_code;
3576 }
3577
3578 // non-JavaThread from this point on:
3579
3580 if (millis <= 0) {
3581 thr_yield();
3582 return 0;
3583 }
3584
3585 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
3586
3587 return os_sleep(millis, interruptible);
3588 }
3589
3590 int os::naked_sleep() {
3591 // %% make the sleep time an integer flag. for now use 1 millisec.
3592 return os_sleep(1, false);
3593 }
3594
3595 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3596 void os::infinite_sleep() {
3597 while (true) { // sleep forever ...
3598 ::sleep(100); // ... 100 seconds at a time
3599 }
3600 }
3601
3602 // Used to convert frequent JVM_Yield() to nops
3603 bool os::dont_yield() {
3604 if (DontYieldALot) {
3605 static hrtime_t last_time = 0;
3606 hrtime_t diff = getTimeNanos() - last_time;
3607
3608 if (diff < DontYieldALotInterval * 1000000)
3609 return true;
3610
3611 last_time += diff;
3612
3613 return false;
3614 }
3615 else {
3616 return false;
3617 }
3618 }
3619
3620 // Caveat: Solaris os::yield() causes a thread-state transition whereas
3621 // the linux and win32 implementations do not. This should be checked.
3622
3623 void os::yield() {
3624 // Yields to all threads with same or greater priority
3625 os::sleep(Thread::current(), 0, false);
3626 }
3627
3628 // Note that yield semantics are defined by the scheduling class to which
3629 // the thread currently belongs. Typically, yield will _not yield to
3630 // other equal or higher priority threads that reside on the dispatch queues
3631 // of other CPUs.
3632
3633 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
3634
3635
3636 // On Solaris we found that yield_all doesn't always yield to all other threads.
3637 // There have been cases where there is a thread ready to execute but it doesn't
3638 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
3639 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a
3640 // SIGWAITING signal which will cause a new lwp to be created. So we count the
3641 // number of times yield_all is called in the one loop and increase the sleep
3642 // time after 8 attempts. If this fails too we increase the concurrency level
3643 // so that the starving thread would get an lwp
3644
3645 void os::yield_all(int attempts) {
3646 // Yields to all threads, including threads with lower priorities
3647 if (attempts == 0) {
3648 os::sleep(Thread::current(), 1, false);
3649 } else {
3650 int iterations = attempts % 30;
3651 if (iterations == 0 && !os::Solaris::T2_libthread()) {
3652 // thr_setconcurrency and _getconcurrency make sense only under T1.
3653 int noofLWPS = thr_getconcurrency();
3654 if (noofLWPS < (Threads::number_of_threads() + 2)) {
3655 thr_setconcurrency(thr_getconcurrency() + 1);
3656 }
3657 } else if (iterations < 25) {
3658 os::sleep(Thread::current(), 1, false);
3659 } else {
3660 os::sleep(Thread::current(), 10, false);
3661 }
3662 }
3663 }
3664
3665 // Called from the tight loops to possibly influence time-sharing heuristics
3666 void os::loop_breaker(int attempts) {
3667 os::yield_all(attempts);
3668 }
3669
3670
3671 // Interface for setting lwp priorities. If we are using T2 libthread,
3672 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3673 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3674 // function is meaningless in this mode so we must adjust the real lwp's priority
3675 // The routines below implement the getting and setting of lwp priorities.
3676 //
3677 // Note: There are three priority scales used on Solaris. Java priotities
3678 // which range from 1 to 10, libthread "thr_setprio" scale which range
3679 // from 0 to 127, and the current scheduling class of the process we
3680 // are running in. This is typically from -60 to +60.
3681 // The setting of the lwp priorities in done after a call to thr_setprio
3682 // so Java priorities are mapped to libthread priorities and we map from
3683 // the latter to lwp priorities. We don't keep priorities stored in
3684 // Java priorities since some of our worker threads want to set priorities
3685 // higher than all Java threads.
3686 //
3687 // For related information:
3688 // (1) man -s 2 priocntl
3689 // (2) man -s 4 priocntl
3690 // (3) man dispadmin
3691 // = librt.so
3692 // = libthread/common/rtsched.c - thrp_setlwpprio().
3693 // = ps -cL <pid> ... to validate priority.
3694 // = sched_get_priority_min and _max
3695 // pthread_create
3696 // sched_setparam
3697 // pthread_setschedparam
3698 //
3699 // Assumptions:
3700 // + We assume that all threads in the process belong to the same
3701 // scheduling class. IE. an homogenous process.
3702 // + Must be root or in IA group to change change "interactive" attribute.
3703 // Priocntl() will fail silently. The only indication of failure is when
3704 // we read-back the value and notice that it hasn't changed.
3705 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3706 // + For RT, change timeslice as well. Invariant:
3707 // constant "priority integral"
3708 // Konst == TimeSlice * (60-Priority)
3709 // Given a priority, compute appropriate timeslice.
3710 // + Higher numerical values have higher priority.
3711
3712 // sched class attributes
3713 typedef struct {
3714 int schedPolicy; // classID
3715 int maxPrio;
3716 int minPrio;
3717 } SchedInfo;
3718
3719
3720 static SchedInfo tsLimits, iaLimits, rtLimits;
3721
3722 #ifdef ASSERT
3723 static int ReadBackValidate = 1;
3724 #endif
3725 static int myClass = 0;
3726 static int myMin = 0;
3727 static int myMax = 0;
3728 static int myCur = 0;
3729 static bool priocntl_enable = false;
3730
3731
3732 // Call the version of priocntl suitable for all supported versions
3733 // of Solaris. We need to call through this wrapper so that we can
3734 // build on Solaris 9 and run on Solaris 8, 9 and 10.
3735 //
3736 // This code should be removed if we ever stop supporting Solaris 8
3737 // and earlier releases.
3738
3739 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3740 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3741 static priocntl_type priocntl_ptr = priocntl_stub;
3742
3743 // Stub to set the value of the real pointer, and then call the real
3744 // function.
3745
3746 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) {
3747 // Try Solaris 8- name only.
3748 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl");
3749 guarantee(tmp != NULL, "priocntl function not found.");
3750 priocntl_ptr = tmp;
3751 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg);
3752 }
3753
3754
3755 // lwp_priocntl_init
3756 //
3757 // Try to determine the priority scale for our process.
3758 //
3759 // Return errno or 0 if OK.
3760 //
3761 static
3762 int lwp_priocntl_init ()
3763 {
3764 int rslt;
3765 pcinfo_t ClassInfo;
3766 pcparms_t ParmInfo;
3767 int i;
3768
3769 if (!UseThreadPriorities) return 0;
3770
3771 // We are using Bound threads, we need to determine our priority ranges
3772 if (os::Solaris::T2_libthread() || UseBoundThreads) {
3773 // If ThreadPriorityPolicy is 1, switch tables
3774 if (ThreadPriorityPolicy == 1) {
3775 for (i = 0 ; i < MaxPriority+1; i++)
3776 os::java_to_os_priority[i] = prio_policy1[i];
3777 }
3778 }
3779 // Not using Bound Threads, set to ThreadPolicy 1
3780 else {
3781 for ( i = 0 ; i < MaxPriority+1; i++ ) {
3782 os::java_to_os_priority[i] = prio_policy1[i];
3783 }
3784 return 0;
3785 }
3786
3787
3788 // Get IDs for a set of well-known scheduling classes.
3789 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3790 // the system. We should have a loop that iterates over the
3791 // classID values, which are known to be "small" integers.
3792
3793 strcpy(ClassInfo.pc_clname, "TS");
3794 ClassInfo.pc_cid = -1;
3795 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3796 if (rslt < 0) return errno;
3797 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3798 tsLimits.schedPolicy = ClassInfo.pc_cid;
3799 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3800 tsLimits.minPrio = -tsLimits.maxPrio;
3801
3802 strcpy(ClassInfo.pc_clname, "IA");
3803 ClassInfo.pc_cid = -1;
3804 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3805 if (rslt < 0) return errno;
3806 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3807 iaLimits.schedPolicy = ClassInfo.pc_cid;
3808 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3809 iaLimits.minPrio = -iaLimits.maxPrio;
3810
3811 strcpy(ClassInfo.pc_clname, "RT");
3812 ClassInfo.pc_cid = -1;
3813 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3814 if (rslt < 0) return errno;
3815 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3816 rtLimits.schedPolicy = ClassInfo.pc_cid;
3817 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3818 rtLimits.minPrio = 0;
3819
3820
3821 // Query our "current" scheduling class.
3822 // This will normally be IA,TS or, rarely, RT.
3823 memset (&ParmInfo, 0, sizeof(ParmInfo));
3824 ParmInfo.pc_cid = PC_CLNULL;
3825 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo );
3826 if ( rslt < 0 ) return errno;
3827 myClass = ParmInfo.pc_cid;
3828
3829 // We now know our scheduling classId, get specific information
3830 // the class.
3831 ClassInfo.pc_cid = myClass;
3832 ClassInfo.pc_clname[0] = 0;
3833 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo );
3834 if ( rslt < 0 ) return errno;
3835
3836 if (ThreadPriorityVerbose)
3837 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3838
3839 memset(&ParmInfo, 0, sizeof(pcparms_t));
3840 ParmInfo.pc_cid = PC_CLNULL;
3841 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3842 if (rslt < 0) return errno;
3843
3844 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3845 myMin = rtLimits.minPrio;
3846 myMax = rtLimits.maxPrio;
3847 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3848 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3849 myMin = iaLimits.minPrio;
3850 myMax = iaLimits.maxPrio;
3851 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3852 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3853 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3854 myMin = tsLimits.minPrio;
3855 myMax = tsLimits.maxPrio;
3856 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3857 } else {
3858 // No clue - punt
3859 if (ThreadPriorityVerbose)
3860 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
3861 return EINVAL; // no clue, punt
3862 }
3863
3864 if (ThreadPriorityVerbose)
3865 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
3866
3867 priocntl_enable = true; // Enable changing priorities
3868 return 0;
3869 }
3870
3871 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3872 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3873 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3874
3875
3876 // scale_to_lwp_priority
3877 //
3878 // Convert from the libthread "thr_setprio" scale to our current
3879 // lwp scheduling class scale.
3880 //
3881 static
3882 int scale_to_lwp_priority (int rMin, int rMax, int x)
3883 {
3884 int v;
3885
3886 if (x == 127) return rMax; // avoid round-down
3887 v = (((x*(rMax-rMin)))/128)+rMin;
3888 return v;
3889 }
3890
3891
3892 // set_lwp_priority
3893 //
3894 // Set the priority of the lwp. This call should only be made
3895 // when using bound threads (T2 threads are bound by default).
3896 //
3897 int set_lwp_priority (int ThreadID, int lwpid, int newPrio )
3898 {
3899 int rslt;
3900 int Actual, Expected, prv;
3901 pcparms_t ParmInfo; // for GET-SET
3902 #ifdef ASSERT
3903 pcparms_t ReadBack; // for readback
3904 #endif
3905
3906 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3907 // Query current values.
3908 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3909 // Cache "pcparms_t" in global ParmCache.
3910 // TODO: elide set-to-same-value
3911
3912 // If something went wrong on init, don't change priorities.
3913 if ( !priocntl_enable ) {
3914 if (ThreadPriorityVerbose)
3915 tty->print_cr("Trying to set priority but init failed, ignoring");
3916 return EINVAL;
3917 }
3918
3919
3920 // If lwp hasn't started yet, just return
3921 // the _start routine will call us again.
3922 if ( lwpid <= 0 ) {
3923 if (ThreadPriorityVerbose) {
3924 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set",
3925 ThreadID, newPrio);
3926 }
3927 return 0;
3928 }
3929
3930 if (ThreadPriorityVerbose) {
3931 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3932 ThreadID, lwpid, newPrio);
3933 }
3934
3935 memset(&ParmInfo, 0, sizeof(pcparms_t));
3936 ParmInfo.pc_cid = PC_CLNULL;
3937 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3938 if (rslt < 0) return errno;
3939
3940 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3941 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3942 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio);
3943 rtInfo->rt_tqsecs = RT_NOCHANGE;
3944 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3945 if (ThreadPriorityVerbose) {
3946 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3947 }
3948 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3949 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3950 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim);
3951 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio);
3952 iaInfo->ia_uprilim = IA_NOCHANGE;
3953 iaInfo->ia_mode = IA_NOCHANGE;
3954 if (ThreadPriorityVerbose) {
3955 tty->print_cr ("IA: [%d...%d] %d->%d\n",
3956 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3957 }
3958 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3959 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3960 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim);
3961 prv = tsInfo->ts_upri;
3962 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio);
3963 tsInfo->ts_uprilim = IA_NOCHANGE;
3964 if (ThreadPriorityVerbose) {
3965 tty->print_cr ("TS: %d [%d...%d] %d->%d\n",
3966 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3967 }
3968 if (prv == tsInfo->ts_upri) return 0;
3969 } else {
3970 if ( ThreadPriorityVerbose ) {
3971 tty->print_cr ("Unknown scheduling class\n");
3972 }
3973 return EINVAL; // no clue, punt
3974 }
3975
3976 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3977 if (ThreadPriorityVerbose && rslt) {
3978 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3979 }
3980 if (rslt < 0) return errno;
3981
3982 #ifdef ASSERT
3983 // Sanity check: read back what we just attempted to set.
3984 // In theory it could have changed in the interim ...
3985 //
3986 // The priocntl system call is tricky.
3987 // Sometimes it'll validate the priority value argument and
3988 // return EINVAL if unhappy. At other times it fails silently.
3989 // Readbacks are prudent.
3990
3991 if (!ReadBackValidate) return 0;
3992
3993 memset(&ReadBack, 0, sizeof(pcparms_t));
3994 ReadBack.pc_cid = PC_CLNULL;
3995 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3996 assert(rslt >= 0, "priocntl failed");
3997 Actual = Expected = 0xBAD;
3998 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3999 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
4000 Actual = RTPRI(ReadBack)->rt_pri;
4001 Expected = RTPRI(ParmInfo)->rt_pri;
4002 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
4003 Actual = IAPRI(ReadBack)->ia_upri;
4004 Expected = IAPRI(ParmInfo)->ia_upri;
4005 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
4006 Actual = TSPRI(ReadBack)->ts_upri;
4007 Expected = TSPRI(ParmInfo)->ts_upri;
4008 } else {
4009 if ( ThreadPriorityVerbose ) {
4010 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid);
4011 }
4012 }
4013
4014 if (Actual != Expected) {
4015 if ( ThreadPriorityVerbose ) {
4016 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
4017 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
4018 }
4019 }
4020 #endif
4021
4022 return 0;
4023 }
4024
4025
4026
4027 // Solaris only gives access to 128 real priorities at a time,
4028 // so we expand Java's ten to fill this range. This would be better
4029 // if we dynamically adjusted relative priorities.
4030 //
4031 // The ThreadPriorityPolicy option allows us to select 2 different
4032 // priority scales.
4033 //
4034 // ThreadPriorityPolicy=0
4035 // Since the Solaris' default priority is MaximumPriority, we do not
4036 // set a priority lower than Max unless a priority lower than
4037 // NormPriority is requested.
4038 //
4039 // ThreadPriorityPolicy=1
4040 // This mode causes the priority table to get filled with
4041 // linear values. NormPriority get's mapped to 50% of the
4042 // Maximum priority an so on. This will cause VM threads
4043 // to get unfair treatment against other Solaris processes
4044 // which do not explicitly alter their thread priorities.
4045 //
4046
4047
4048 int os::java_to_os_priority[MaxPriority + 1] = {
4049 -99999, // 0 Entry should never be used
4050
4051 0, // 1 MinPriority
4052 32, // 2
4053 64, // 3
4054
4055 96, // 4
4056 127, // 5 NormPriority
4057 127, // 6
4058
4059 127, // 7
4060 127, // 8
4061 127, // 9 NearMaxPriority
4062
4063 127 // 10 MaxPriority
4064 };
4065
4066
4067 OSReturn os::set_native_priority(Thread* thread, int newpri) {
4068 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
4069 if ( !UseThreadPriorities ) return OS_OK;
4070 int status = thr_setprio(thread->osthread()->thread_id(), newpri);
4071 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) )
4072 status |= (set_lwp_priority (thread->osthread()->thread_id(),
4073 thread->osthread()->lwp_id(), newpri ));
4074 return (status == 0) ? OS_OK : OS_ERR;
4075 }
4076
4077
4078 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
4079 int p;
4080 if ( !UseThreadPriorities ) {
4081 *priority_ptr = NormalPriority;
4082 return OS_OK;
4083 }
4084 int status = thr_getprio(thread->osthread()->thread_id(), &p);
4085 if (status != 0) {
4086 return OS_ERR;
4087 }
4088 *priority_ptr = p;
4089 return OS_OK;
4090 }
4091
4092
4093 // Hint to the underlying OS that a task switch would not be good.
4094 // Void return because it's a hint and can fail.
4095 void os::hint_no_preempt() {
4096 schedctl_start(schedctl_init());
4097 }
4098
4099 void os::interrupt(Thread* thread) {
4100 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4101
4102 OSThread* osthread = thread->osthread();
4103
4104 int isInterrupted = osthread->interrupted();
4105 if (!isInterrupted) {
4106 osthread->set_interrupted(true);
4107 OrderAccess::fence();
4108 // os::sleep() is implemented with either poll (NULL,0,timeout) or
4109 // by parking on _SleepEvent. If the former, thr_kill will unwedge
4110 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper.
4111 ParkEvent * const slp = thread->_SleepEvent ;
4112 if (slp != NULL) slp->unpark() ;
4113 }
4114
4115 // For JSR166: unpark after setting status but before thr_kill -dl
4116 if (thread->is_Java_thread()) {
4117 ((JavaThread*)thread)->parker()->unpark();
4118 }
4119
4120 // Handle interruptible wait() ...
4121 ParkEvent * const ev = thread->_ParkEvent ;
4122 if (ev != NULL) ev->unpark() ;
4123
4124 // When events are used everywhere for os::sleep, then this thr_kill
4125 // will only be needed if UseVMInterruptibleIO is true.
4126
4127 if (!isInterrupted) {
4128 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt());
4129 assert_status(status == 0, status, "thr_kill");
4130
4131 // Bump thread interruption counter
4132 RuntimeService::record_thread_interrupt_signaled_count();
4133 }
4134 }
4135
4136
4137 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
4138 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4139
4140 OSThread* osthread = thread->osthread();
4141
4142 bool res = osthread->interrupted();
4143
4144 // NOTE that since there is no "lock" around these two operations,
4145 // there is the possibility that the interrupted flag will be
4146 // "false" but that the interrupt event will be set. This is
4147 // intentional. The effect of this is that Object.wait() will appear
4148 // to have a spurious wakeup, which is not harmful, and the
4149 // possibility is so rare that it is not worth the added complexity
4150 // to add yet another lock. It has also been recommended not to put
4151 // the interrupted flag into the os::Solaris::Event structure,
4152 // because it hides the issue.
4153 if (res && clear_interrupted) {
4154 osthread->set_interrupted(false);
4155 }
4156 return res;
4157 }
4158
4159
4160 void os::print_statistics() {
4161 }
4162
4163 int os::message_box(const char* title, const char* message) {
4164 int i;
4165 fdStream err(defaultStream::error_fd());
4166 for (i = 0; i < 78; i++) err.print_raw("=");
4167 err.cr();
4168 err.print_raw_cr(title);
4169 for (i = 0; i < 78; i++) err.print_raw("-");
4170 err.cr();
4171 err.print_raw_cr(message);
4172 for (i = 0; i < 78; i++) err.print_raw("=");
4173 err.cr();
4174
4175 char buf[16];
4176 // Prevent process from exiting upon "read error" without consuming all CPU
4177 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
4178
4179 return buf[0] == 'y' || buf[0] == 'Y';
4180 }
4181
4182 // A lightweight implementation that does not suspend the target thread and
4183 // thus returns only a hint. Used for profiling only!
4184 ExtendedPC os::get_thread_pc(Thread* thread) {
4185 // Make sure that it is called by the watcher and the Threads lock is owned.
4186 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
4187 // For now, is only used to profile the VM Thread
4188 assert(thread->is_VM_thread(), "Can only be called for VMThread");
4189 ExtendedPC epc;
4190
4191 GetThreadPC_Callback cb(ProfileVM_lock);
4192 OSThread *osthread = thread->osthread();
4193 const int time_to_wait = 400; // 400ms wait for initial response
4194 int status = cb.interrupt(thread, time_to_wait);
4195
4196 if (cb.is_done() ) {
4197 epc = cb.addr();
4198 } else {
4199 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status",
4200 osthread->thread_id(), status););
4201 // epc is already NULL
4202 }
4203 return epc;
4204 }
4205
4206
4207 // This does not do anything on Solaris. This is basically a hook for being
4208 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
4209 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
4210 f(value, method, args, thread);
4211 }
4212
4213 // This routine may be used by user applications as a "hook" to catch signals.
4214 // The user-defined signal handler must pass unrecognized signals to this
4215 // routine, and if it returns true (non-zero), then the signal handler must
4216 // return immediately. If the flag "abort_if_unrecognized" is true, then this
4217 // routine will never retun false (zero), but instead will execute a VM panic
4218 // routine kill the process.
4219 //
4220 // If this routine returns false, it is OK to call it again. This allows
4221 // the user-defined signal handler to perform checks either before or after
4222 // the VM performs its own checks. Naturally, the user code would be making
4223 // a serious error if it tried to handle an exception (such as a null check
4224 // or breakpoint) that the VM was generating for its own correct operation.
4225 //
4226 // This routine may recognize any of the following kinds of signals:
4227 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
4228 // os::Solaris::SIGasync
4229 // It should be consulted by handlers for any of those signals.
4230 // It explicitly does not recognize os::Solaris::SIGinterrupt
4231 //
4232 // The caller of this routine must pass in the three arguments supplied
4233 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
4234 // field of the structure passed to sigaction(). This routine assumes that
4235 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
4236 //
4237 // Note that the VM will print warnings if it detects conflicting signal
4238 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
4239 //
4240 extern "C" JNIEXPORT int
4241 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext,
4242 int abort_if_unrecognized);
4243
4244
4245 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
4246 JVM_handle_solaris_signal(sig, info, ucVoid, true);
4247 }
4248
4249 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
4250 is needed to provoke threads blocked on IO to return an EINTR
4251 Note: this explicitly does NOT call JVM_handle_solaris_signal and
4252 does NOT participate in signal chaining due to requirement for
4253 NOT setting SA_RESTART to make EINTR work. */
4254 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
4255 if (UseSignalChaining) {
4256 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
4257 if (actp && actp->sa_handler) {
4258 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
4259 }
4260 }
4261 }
4262
4263 // This boolean allows users to forward their own non-matching signals
4264 // to JVM_handle_solaris_signal, harmlessly.
4265 bool os::Solaris::signal_handlers_are_installed = false;
4266
4267 // For signal-chaining
4268 bool os::Solaris::libjsig_is_loaded = false;
4269 typedef struct sigaction *(*get_signal_t)(int);
4270 get_signal_t os::Solaris::get_signal_action = NULL;
4271
4272 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
4273 struct sigaction *actp = NULL;
4274
4275 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
4276 // Retrieve the old signal handler from libjsig
4277 actp = (*get_signal_action)(sig);
4278 }
4279 if (actp == NULL) {
4280 // Retrieve the preinstalled signal handler from jvm
4281 actp = get_preinstalled_handler(sig);
4282 }
4283
4284 return actp;
4285 }
4286
4287 static bool call_chained_handler(struct sigaction *actp, int sig,
4288 siginfo_t *siginfo, void *context) {
4289 // Call the old signal handler
4290 if (actp->sa_handler == SIG_DFL) {
4291 // It's more reasonable to let jvm treat it as an unexpected exception
4292 // instead of taking the default action.
4293 return false;
4294 } else if (actp->sa_handler != SIG_IGN) {
4295 if ((actp->sa_flags & SA_NODEFER) == 0) {
4296 // automaticlly block the signal
4297 sigaddset(&(actp->sa_mask), sig);
4298 }
4299
4300 sa_handler_t hand;
4301 sa_sigaction_t sa;
4302 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4303 // retrieve the chained handler
4304 if (siginfo_flag_set) {
4305 sa = actp->sa_sigaction;
4306 } else {
4307 hand = actp->sa_handler;
4308 }
4309
4310 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4311 actp->sa_handler = SIG_DFL;
4312 }
4313
4314 // try to honor the signal mask
4315 sigset_t oset;
4316 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4317
4318 // call into the chained handler
4319 if (siginfo_flag_set) {
4320 (*sa)(sig, siginfo, context);
4321 } else {
4322 (*hand)(sig);
4323 }
4324
4325 // restore the signal mask
4326 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4327 }
4328 // Tell jvm's signal handler the signal is taken care of.
4329 return true;
4330 }
4331
4332 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4333 bool chained = false;
4334 // signal-chaining
4335 if (UseSignalChaining) {
4336 struct sigaction *actp = get_chained_signal_action(sig);
4337 if (actp != NULL) {
4338 chained = call_chained_handler(actp, sig, siginfo, context);
4339 }
4340 }
4341 return chained;
4342 }
4343
4344 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4345 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4346 if (preinstalled_sigs[sig] != 0) {
4347 return &chainedsigactions[sig];
4348 }
4349 return NULL;
4350 }
4351
4352 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
4353
4354 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4355 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4356 chainedsigactions[sig] = oldAct;
4357 preinstalled_sigs[sig] = 1;
4358 }
4359
4360 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
4361 // Check for overwrite.
4362 struct sigaction oldAct;
4363 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4364 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4365 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4366 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4367 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4368 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4369 if (AllowUserSignalHandlers || !set_installed) {
4370 // Do not overwrite; user takes responsibility to forward to us.
4371 return;
4372 } else if (UseSignalChaining) {
4373 if (oktochain) {
4374 // save the old handler in jvm
4375 save_preinstalled_handler(sig, oldAct);
4376 } else {
4377 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4378 }
4379 // libjsig also interposes the sigaction() call below and saves the
4380 // old sigaction on it own.
4381 } else {
4382 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4383 "%#lx for signal %d.", (long)oldhand, sig));
4384 }
4385 }
4386
4387 struct sigaction sigAct;
4388 sigfillset(&(sigAct.sa_mask));
4389 sigAct.sa_handler = SIG_DFL;
4390
4391 sigAct.sa_sigaction = signalHandler;
4392 // Handle SIGSEGV on alternate signal stack if
4393 // not using stack banging
4394 if (!UseStackBanging && sig == SIGSEGV) {
4395 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4396 // Interruptible i/o requires SA_RESTART cleared so EINTR
4397 // is returned instead of restarting system calls
4398 } else if (sig == os::Solaris::SIGinterrupt()) {
4399 sigemptyset(&sigAct.sa_mask);
4400 sigAct.sa_handler = NULL;
4401 sigAct.sa_flags = SA_SIGINFO;
4402 sigAct.sa_sigaction = sigINTRHandler;
4403 } else {
4404 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4405 }
4406 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4407
4408 sigaction(sig, &sigAct, &oldAct);
4409
4410 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4411 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4412 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4413 }
4414
4415
4416 #define DO_SIGNAL_CHECK(sig) \
4417 if (!sigismember(&check_signal_done, sig)) \
4418 os::Solaris::check_signal_handler(sig)
4419
4420 // This method is a periodic task to check for misbehaving JNI applications
4421 // under CheckJNI, we can add any periodic checks here
4422
4423 void os::run_periodic_checks() {
4424 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4425 // thereby preventing a NULL checks.
4426 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
4427
4428 if (check_signals == false) return;
4429
4430 // SEGV and BUS if overridden could potentially prevent
4431 // generation of hs*.log in the event of a crash, debugging
4432 // such a case can be very challenging, so we absolutely
4433 // check for the following for a good measure:
4434 DO_SIGNAL_CHECK(SIGSEGV);
4435 DO_SIGNAL_CHECK(SIGILL);
4436 DO_SIGNAL_CHECK(SIGFPE);
4437 DO_SIGNAL_CHECK(SIGBUS);
4438 DO_SIGNAL_CHECK(SIGPIPE);
4439 DO_SIGNAL_CHECK(SIGXFSZ);
4440
4441 // ReduceSignalUsage allows the user to override these handlers
4442 // see comments at the very top and jvm_solaris.h
4443 if (!ReduceSignalUsage) {
4444 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4445 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4446 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4447 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4448 }
4449
4450 // See comments above for using JVM1/JVM2 and UseAltSigs
4451 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4452 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4453
4454 }
4455
4456 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4457
4458 static os_sigaction_t os_sigaction = NULL;
4459
4460 void os::Solaris::check_signal_handler(int sig) {
4461 char buf[O_BUFLEN];
4462 address jvmHandler = NULL;
4463
4464 struct sigaction act;
4465 if (os_sigaction == NULL) {
4466 // only trust the default sigaction, in case it has been interposed
4467 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4468 if (os_sigaction == NULL) return;
4469 }
4470
4471 os_sigaction(sig, (struct sigaction*)NULL, &act);
4472
4473 address thisHandler = (act.sa_flags & SA_SIGINFO)
4474 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4475 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
4476
4477
4478 switch(sig) {
4479 case SIGSEGV:
4480 case SIGBUS:
4481 case SIGFPE:
4482 case SIGPIPE:
4483 case SIGXFSZ:
4484 case SIGILL:
4485 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4486 break;
4487
4488 case SHUTDOWN1_SIGNAL:
4489 case SHUTDOWN2_SIGNAL:
4490 case SHUTDOWN3_SIGNAL:
4491 case BREAK_SIGNAL:
4492 jvmHandler = (address)user_handler();
4493 break;
4494
4495 default:
4496 int intrsig = os::Solaris::SIGinterrupt();
4497 int asynsig = os::Solaris::SIGasync();
4498
4499 if (sig == intrsig) {
4500 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4501 } else if (sig == asynsig) {
4502 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4503 } else {
4504 return;
4505 }
4506 break;
4507 }
4508
4509
4510 if (thisHandler != jvmHandler) {
4511 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4512 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4513 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4514 // No need to check this sig any longer
4515 sigaddset(&check_signal_done, sig);
4516 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4517 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4518 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4519 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4520 // No need to check this sig any longer
4521 sigaddset(&check_signal_done, sig);
4522 }
4523
4524 // Print all the signal handler state
4525 if (sigismember(&check_signal_done, sig)) {
4526 print_signal_handlers(tty, buf, O_BUFLEN);
4527 }
4528
4529 }
4530
4531 void os::Solaris::install_signal_handlers() {
4532 bool libjsigdone = false;
4533 signal_handlers_are_installed = true;
4534
4535 // signal-chaining
4536 typedef void (*signal_setting_t)();
4537 signal_setting_t begin_signal_setting = NULL;
4538 signal_setting_t end_signal_setting = NULL;
4539 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4540 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4541 if (begin_signal_setting != NULL) {
4542 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4543 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4544 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4545 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4546 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4547 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4548 libjsig_is_loaded = true;
4549 if (os::Solaris::get_libjsig_version != NULL) {
4550 libjsigversion = (*os::Solaris::get_libjsig_version)();
4551 }
4552 assert(UseSignalChaining, "should enable signal-chaining");
4553 }
4554 if (libjsig_is_loaded) {
4555 // Tell libjsig jvm is setting signal handlers
4556 (*begin_signal_setting)();
4557 }
4558
4559 set_signal_handler(SIGSEGV, true, true);
4560 set_signal_handler(SIGPIPE, true, true);
4561 set_signal_handler(SIGXFSZ, true, true);
4562 set_signal_handler(SIGBUS, true, true);
4563 set_signal_handler(SIGILL, true, true);
4564 set_signal_handler(SIGFPE, true, true);
4565
4566
4567 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4568
4569 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4570 // can not register overridable signals which might be > 32
4571 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4572 // Tell libjsig jvm has finished setting signal handlers
4573 (*end_signal_setting)();
4574 libjsigdone = true;
4575 }
4576 }
4577
4578 // Never ok to chain our SIGinterrupt
4579 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4580 set_signal_handler(os::Solaris::SIGasync(), true, true);
4581
4582 if (libjsig_is_loaded && !libjsigdone) {
4583 // Tell libjsig jvm finishes setting signal handlers
4584 (*end_signal_setting)();
4585 }
4586
4587 // We don't activate signal checker if libjsig is in place, we trust ourselves
4588 // and if UserSignalHandler is installed all bets are off
4589 if (CheckJNICalls) {
4590 if (libjsig_is_loaded) {
4591 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4592 check_signals = false;
4593 }
4594 if (AllowUserSignalHandlers) {
4595 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4596 check_signals = false;
4597 }
4598 }
4599 }
4600
4601
4602 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
4603
4604 const char * signames[] = {
4605 "SIG0",
4606 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4607 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4608 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4609 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4610 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4611 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4612 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4613 "SIGCANCEL", "SIGLOST"
4614 };
4615
4616 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4617 if (0 < exception_code && exception_code <= SIGRTMAX) {
4618 // signal
4619 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4620 jio_snprintf(buf, size, "%s", signames[exception_code]);
4621 } else {
4622 jio_snprintf(buf, size, "SIG%d", exception_code);
4623 }
4624 return buf;
4625 } else {
4626 return NULL;
4627 }
4628 }
4629
4630 // (Static) wrappers for the new libthread API
4631 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
4632 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
4633 int_fnP_thread_t_i os::Solaris::_thr_setmutator;
4634 int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
4635 int_fnP_thread_t os::Solaris::_thr_continue_mutator;
4636
4637 // (Static) wrapper for getisax(2) call.
4638 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4639
4640 // (Static) wrappers for the liblgrp API
4641 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4642 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4643 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4644 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4645 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4646 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4647 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4648 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4649 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4650
4651 // (Static) wrapper for meminfo() call.
4652 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4653
4654 static address resolve_symbol_lazy(const char* name) {
4655 address addr = (address) dlsym(RTLD_DEFAULT, name);
4656 if(addr == NULL) {
4657 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4658 addr = (address) dlsym(RTLD_NEXT, name);
4659 }
4660 return addr;
4661 }
4662
4663 static address resolve_symbol(const char* name) {
4664 address addr = resolve_symbol_lazy(name);
4665 if(addr == NULL) {
4666 fatal(dlerror());
4667 }
4668 return addr;
4669 }
4670
4671
4672
4673 // isT2_libthread()
4674 //
4675 // Routine to determine if we are currently using the new T2 libthread.
4676 //
4677 // We determine if we are using T2 by reading /proc/self/lstatus and
4678 // looking for a thread with the ASLWP bit set. If we find this status
4679 // bit set, we must assume that we are NOT using T2. The T2 team
4680 // has approved this algorithm.
4681 //
4682 // We need to determine if we are running with the new T2 libthread
4683 // since setting native thread priorities is handled differently
4684 // when using this library. All threads created using T2 are bound
4685 // threads. Calling thr_setprio is meaningless in this case.
4686 //
4687 bool isT2_libthread() {
4688 static prheader_t * lwpArray = NULL;
4689 static int lwpSize = 0;
4690 static int lwpFile = -1;
4691 lwpstatus_t * that;
4692 char lwpName [128];
4693 bool isT2 = false;
4694
4695 #define ADR(x) ((uintptr_t)(x))
4696 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
4697
4698 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0);
4699 if (lwpFile < 0) {
4700 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n");
4701 return false;
4702 }
4703 lwpSize = 16*1024;
4704 for (;;) {
4705 ::lseek64 (lwpFile, 0, SEEK_SET);
4706 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize);
4707 if (::read(lwpFile, lwpArray, lwpSize) < 0) {
4708 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n");
4709 break;
4710 }
4711 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
4712 // We got a good snapshot - now iterate over the list.
4713 int aslwpcount = 0;
4714 for (int i = 0; i < lwpArray->pr_nent; i++ ) {
4715 that = LWPINDEX(lwpArray,i);
4716 if (that->pr_flags & PR_ASLWP) {
4717 aslwpcount++;
4718 }
4719 }
4720 if (aslwpcount == 0) isT2 = true;
4721 break;
4722 }
4723 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
4724 FREE_C_HEAP_ARRAY(char, lwpArray); // retry.
4725 }
4726
4727 FREE_C_HEAP_ARRAY(char, lwpArray);
4728 ::close (lwpFile);
4729 if (ThreadPriorityVerbose) {
4730 if (isT2) tty->print_cr("We are running with a T2 libthread\n");
4731 else tty->print_cr("We are not running with a T2 libthread\n");
4732 }
4733 return isT2;
4734 }
4735
4736
4737 void os::Solaris::libthread_init() {
4738 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4739
4740 // Determine if we are running with the new T2 libthread
4741 os::Solaris::set_T2_libthread(isT2_libthread());
4742
4743 lwp_priocntl_init();
4744
4745 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4746 if(func == NULL) {
4747 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4748 // Guarantee that this VM is running on an new enough OS (5.6 or
4749 // later) that it will have a new enough libthread.so.
4750 guarantee(func != NULL, "libthread.so is too old.");
4751 }
4752
4753 // Initialize the new libthread getstate API wrappers
4754 func = resolve_symbol("thr_getstate");
4755 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
4756
4757 func = resolve_symbol("thr_setstate");
4758 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
4759
4760 func = resolve_symbol("thr_setmutator");
4761 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
4762
4763 func = resolve_symbol("thr_suspend_mutator");
4764 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4765
4766 func = resolve_symbol("thr_continue_mutator");
4767 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4768
4769 int size;
4770 void (*handler_info_func)(address *, int *);
4771 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4772 handler_info_func(&handler_start, &size);
4773 handler_end = handler_start + size;
4774 }
4775
4776
4777 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4778 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4779 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4780 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4781 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4782 int os::Solaris::_mutex_scope = USYNC_THREAD;
4783
4784 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4785 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4786 int_fnP_cond_tP os::Solaris::_cond_signal;
4787 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4788 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4789 int_fnP_cond_tP os::Solaris::_cond_destroy;
4790 int os::Solaris::_cond_scope = USYNC_THREAD;
4791
4792 void os::Solaris::synchronization_init() {
4793 if(UseLWPSynchronization) {
4794 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4795 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4796 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4797 os::Solaris::set_mutex_init(lwp_mutex_init);
4798 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4799 os::Solaris::set_mutex_scope(USYNC_THREAD);
4800
4801 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4802 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4803 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4804 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4805 os::Solaris::set_cond_init(lwp_cond_init);
4806 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4807 os::Solaris::set_cond_scope(USYNC_THREAD);
4808 }
4809 else {
4810 os::Solaris::set_mutex_scope(USYNC_THREAD);
4811 os::Solaris::set_cond_scope(USYNC_THREAD);
4812
4813 if(UsePthreads) {
4814 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4815 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4816 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4817 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4818 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4819
4820 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4821 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4822 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4823 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4824 os::Solaris::set_cond_init(pthread_cond_default_init);
4825 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4826 }
4827 else {
4828 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4829 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4830 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4831 os::Solaris::set_mutex_init(::mutex_init);
4832 os::Solaris::set_mutex_destroy(::mutex_destroy);
4833
4834 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4835 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4836 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4837 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4838 os::Solaris::set_cond_init(::cond_init);
4839 os::Solaris::set_cond_destroy(::cond_destroy);
4840 }
4841 }
4842 }
4843
4844 bool os::Solaris::liblgrp_init() {
4845 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4846 if (handle != NULL) {
4847 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4848 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4849 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4850 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4851 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4852 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4853 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4854 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4855 dlsym(handle, "lgrp_cookie_stale")));
4856
4857 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4858 set_lgrp_cookie(c);
4859 return true;
4860 }
4861 return false;
4862 }
4863
4864 void os::Solaris::misc_sym_init() {
4865 address func;
4866
4867 // getisax
4868 func = resolve_symbol_lazy("getisax");
4869 if (func != NULL) {
4870 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4871 }
4872
4873 // meminfo
4874 func = resolve_symbol_lazy("meminfo");
4875 if (func != NULL) {
4876 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4877 }
4878 }
4879
4880 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4881 assert(_getisax != NULL, "_getisax not set");
4882 return _getisax(array, n);
4883 }
4884
4885 // Symbol doesn't exist in Solaris 8 pset.h
4886 #ifndef PS_MYID
4887 #define PS_MYID -3
4888 #endif
4889
4890 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4891 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4892 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4893
4894 void init_pset_getloadavg_ptr(void) {
4895 pset_getloadavg_ptr =
4896 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4897 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4898 warning("pset_getloadavg function not found");
4899 }
4900 }
4901
4902 int os::Solaris::_dev_zero_fd = -1;
4903
4904 // this is called _before_ the global arguments have been parsed
4905 void os::init(void) {
4906 _initial_pid = getpid();
4907
4908 max_hrtime = first_hrtime = gethrtime();
4909
4910 init_random(1234567);
4911
4912 page_size = sysconf(_SC_PAGESIZE);
4913 if (page_size == -1)
4914 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4915 strerror(errno)));
4916 init_page_sizes((size_t) page_size);
4917
4918 Solaris::initialize_system_info();
4919
4920 // Initialize misc. symbols as soon as possible, so we can use them
4921 // if we need them.
4922 Solaris::misc_sym_init();
4923
4924 int fd = ::open("/dev/zero", O_RDWR);
4925 if (fd < 0) {
4926 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
4927 } else {
4928 Solaris::set_dev_zero_fd(fd);
4929
4930 // Close on exec, child won't inherit.
4931 fcntl(fd, F_SETFD, FD_CLOEXEC);
4932 }
4933
4934 clock_tics_per_sec = CLK_TCK;
4935
4936 // check if dladdr1() exists; dladdr1 can provide more information than
4937 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4938 // and is available on linker patches for 5.7 and 5.8.
4939 // libdl.so must have been loaded, this call is just an entry lookup
4940 void * hdl = dlopen("libdl.so", RTLD_NOW);
4941 if (hdl)
4942 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4943
4944 // (Solaris only) this switches to calls that actually do locking.
4945 ThreadCritical::initialize();
4946
4947 main_thread = thr_self();
4948
4949 // Constant minimum stack size allowed. It must be at least
4950 // the minimum of what the OS supports (thr_min_stack()), and
4951 // enough to allow the thread to get to user bytecode execution.
4952 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
4953 // If the pagesize of the VM is greater than 8K determine the appropriate
4954 // number of initial guard pages. The user can change this with the
4955 // command line arguments, if needed.
4956 if (vm_page_size() > 8*K) {
4957 StackYellowPages = 1;
4958 StackRedPages = 1;
4959 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
4960 }
4961 }
4962
4963 // To install functions for atexit system call
4964 extern "C" {
4965 static void perfMemory_exit_helper() {
4966 perfMemory_exit();
4967 }
4968 }
4969
4970 // this is called _after_ the global arguments have been parsed
4971 jint os::init_2(void) {
4972 // try to enable extended file IO ASAP, see 6431278
4973 os::Solaris::try_enable_extended_io();
4974
4975 // Allocate a single page and mark it as readable for safepoint polling. Also
4976 // use this first mmap call to check support for MAP_ALIGN.
4977 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
4978 page_size,
4979 MAP_PRIVATE | MAP_ALIGN,
4980 PROT_READ);
4981 if (polling_page == NULL) {
4982 has_map_align = false;
4983 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
4984 PROT_READ);
4985 }
4986
4987 os::set_polling_page(polling_page);
4988
4989 #ifndef PRODUCT
4990 if( Verbose && PrintMiscellaneous )
4991 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
4992 #endif
4993
4994 if (!UseMembar) {
4995 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
4996 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
4997 os::set_memory_serialize_page( mem_serialize_page );
4998
4999 #ifndef PRODUCT
5000 if(Verbose && PrintMiscellaneous)
5001 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
5002 #endif
5003 }
5004
5005 os::large_page_init();
5006
5007 // Check minimum allowable stack size for thread creation and to initialize
5008 // the java system classes, including StackOverflowError - depends on page
5009 // size. Add a page for compiler2 recursion in main thread.
5010 // Add in 2*BytesPerWord times page size to account for VM stack during
5011 // class initialization depending on 32 or 64 bit VM.
5012 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
5013 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
5014 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
5015
5016 size_t threadStackSizeInBytes = ThreadStackSize * K;
5017 if (threadStackSizeInBytes != 0 &&
5018 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
5019 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
5020 os::Solaris::min_stack_allowed/K);
5021 return JNI_ERR;
5022 }
5023
5024 // For 64kbps there will be a 64kb page size, which makes
5025 // the usable default stack size quite a bit less. Increase the
5026 // stack for 64kb (or any > than 8kb) pages, this increases
5027 // virtual memory fragmentation (since we're not creating the
5028 // stack on a power of 2 boundary. The real fix for this
5029 // should be to fix the guard page mechanism.
5030
5031 if (vm_page_size() > 8*K) {
5032 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
5033 ? threadStackSizeInBytes +
5034 ((StackYellowPages + StackRedPages) * vm_page_size())
5035 : 0;
5036 ThreadStackSize = threadStackSizeInBytes/K;
5037 }
5038
5039 // Make the stack size a multiple of the page size so that
5040 // the yellow/red zones can be guarded.
5041 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
5042 vm_page_size()));
5043
5044 Solaris::libthread_init();
5045
5046 if (UseNUMA) {
5047 if (!Solaris::liblgrp_init()) {
5048 UseNUMA = false;
5049 } else {
5050 size_t lgrp_limit = os::numa_get_groups_num();
5051 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit);
5052 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
5053 FREE_C_HEAP_ARRAY(int, lgrp_ids);
5054 if (lgrp_num < 2) {
5055 // There's only one locality group, disable NUMA.
5056 UseNUMA = false;
5057 }
5058 }
5059 // ISM is not compatible with the NUMA allocator - it always allocates
5060 // pages round-robin across the lgroups.
5061 if (UseNUMA && UseLargePages && UseISM) {
5062 if (!FLAG_IS_DEFAULT(UseNUMA)) {
5063 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) {
5064 UseLargePages = false;
5065 } else {
5066 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator");
5067 UseNUMA = false;
5068 }
5069 } else {
5070 UseNUMA = false;
5071 }
5072 }
5073 if (!UseNUMA && ForceNUMA) {
5074 UseNUMA = true;
5075 }
5076 }
5077
5078 Solaris::signal_sets_init();
5079 Solaris::init_signal_mem();
5080 Solaris::install_signal_handlers();
5081
5082 if (libjsigversion < JSIG_VERSION_1_4_1) {
5083 Maxlibjsigsigs = OLDMAXSIGNUM;
5084 }
5085
5086 // initialize synchronization primitives to use either thread or
5087 // lwp synchronization (controlled by UseLWPSynchronization)
5088 Solaris::synchronization_init();
5089
5090 if (MaxFDLimit) {
5091 // set the number of file descriptors to max. print out error
5092 // if getrlimit/setrlimit fails but continue regardless.
5093 struct rlimit nbr_files;
5094 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
5095 if (status != 0) {
5096 if (PrintMiscellaneous && (Verbose || WizardMode))
5097 perror("os::init_2 getrlimit failed");
5098 } else {
5099 nbr_files.rlim_cur = nbr_files.rlim_max;
5100 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
5101 if (status != 0) {
5102 if (PrintMiscellaneous && (Verbose || WizardMode))
5103 perror("os::init_2 setrlimit failed");
5104 }
5105 }
5106 }
5107
5108 // Calculate theoretical max. size of Threads to guard gainst
5109 // artifical out-of-memory situations, where all available address-
5110 // space has been reserved by thread stacks. Default stack size is 1Mb.
5111 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
5112 JavaThread::stack_size_at_create() : (1*K*K);
5113 assert(pre_thread_stack_size != 0, "Must have a stack");
5114 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
5115 // we should start doing Virtual Memory banging. Currently when the threads will
5116 // have used all but 200Mb of space.
5117 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
5118 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
5119
5120 // at-exit methods are called in the reverse order of their registration.
5121 // In Solaris 7 and earlier, atexit functions are called on return from
5122 // main or as a result of a call to exit(3C). There can be only 32 of
5123 // these functions registered and atexit() does not set errno. In Solaris
5124 // 8 and later, there is no limit to the number of functions registered
5125 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
5126 // functions are called upon dlclose(3DL) in addition to return from main
5127 // and exit(3C).
5128
5129 if (PerfAllowAtExitRegistration) {
5130 // only register atexit functions if PerfAllowAtExitRegistration is set.
5131 // atexit functions can be delayed until process exit time, which
5132 // can be problematic for embedded VM situations. Embedded VMs should
5133 // call DestroyJavaVM() to assure that VM resources are released.
5134
5135 // note: perfMemory_exit_helper atexit function may be removed in
5136 // the future if the appropriate cleanup code can be added to the
5137 // VM_Exit VMOperation's doit method.
5138 if (atexit(perfMemory_exit_helper) != 0) {
5139 warning("os::init2 atexit(perfMemory_exit_helper) failed");
5140 }
5141 }
5142
5143 // Init pset_loadavg function pointer
5144 init_pset_getloadavg_ptr();
5145
5146 return JNI_OK;
5147 }
5148
5149 void os::init_3(void) {
5150 return;
5151 }
5152
5153 // Mark the polling page as unreadable
5154 void os::make_polling_page_unreadable(void) {
5155 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
5156 fatal("Could not disable polling page");
5157 };
5158
5159 // Mark the polling page as readable
5160 void os::make_polling_page_readable(void) {
5161 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
5162 fatal("Could not enable polling page");
5163 };
5164
5165 // OS interface.
5166
5167 bool os::check_heap(bool force) { return true; }
5168
5169 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
5170 static vsnprintf_t sol_vsnprintf = NULL;
5171
5172 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
5173 if (!sol_vsnprintf) {
5174 //search for the named symbol in the objects that were loaded after libjvm
5175 void* where = RTLD_NEXT;
5176 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5177 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5178 if (!sol_vsnprintf){
5179 //search for the named symbol in the objects that were loaded before libjvm
5180 where = RTLD_DEFAULT;
5181 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5182 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5183 assert(sol_vsnprintf != NULL, "vsnprintf not found");
5184 }
5185 }
5186 return (*sol_vsnprintf)(buf, count, fmt, argptr);
5187 }
5188
5189
5190 // Is a (classpath) directory empty?
5191 bool os::dir_is_empty(const char* path) {
5192 DIR *dir = NULL;
5193 struct dirent *ptr;
5194
5195 dir = opendir(path);
5196 if (dir == NULL) return true;
5197
5198 /* Scan the directory */
5199 bool result = true;
5200 char buf[sizeof(struct dirent) + MAX_PATH];
5201 struct dirent *dbuf = (struct dirent *) buf;
5202 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
5203 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
5204 result = false;
5205 }
5206 }
5207 closedir(dir);
5208 return result;
5209 }
5210
5211 // This code originates from JDK's sysOpen and open64_w
5212 // from src/solaris/hpi/src/system_md.c
5213
5214 #ifndef O_DELETE
5215 #define O_DELETE 0x10000
5216 #endif
5217
5218 // Open a file. Unlink the file immediately after open returns
5219 // if the specified oflag has the O_DELETE flag set.
5220 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
5221
5222 int os::open(const char *path, int oflag, int mode) {
5223 if (strlen(path) > MAX_PATH - 1) {
5224 errno = ENAMETOOLONG;
5225 return -1;
5226 }
5227 int fd;
5228 int o_delete = (oflag & O_DELETE);
5229 oflag = oflag & ~O_DELETE;
5230
5231 fd = ::open64(path, oflag, mode);
5232 if (fd == -1) return -1;
5233
5234 //If the open succeeded, the file might still be a directory
5235 {
5236 struct stat64 buf64;
5237 int ret = ::fstat64(fd, &buf64);
5238 int st_mode = buf64.st_mode;
5239
5240 if (ret != -1) {
5241 if ((st_mode & S_IFMT) == S_IFDIR) {
5242 errno = EISDIR;
5243 ::close(fd);
5244 return -1;
5245 }
5246 } else {
5247 ::close(fd);
5248 return -1;
5249 }
5250 }
5251 /*
5252 * 32-bit Solaris systems suffer from:
5253 *
5254 * - an historical default soft limit of 256 per-process file
5255 * descriptors that is too low for many Java programs.
5256 *
5257 * - a design flaw where file descriptors created using stdio
5258 * fopen must be less than 256, _even_ when the first limit above
5259 * has been raised. This can cause calls to fopen (but not calls to
5260 * open, for example) to fail mysteriously, perhaps in 3rd party
5261 * native code (although the JDK itself uses fopen). One can hardly
5262 * criticize them for using this most standard of all functions.
5263 *
5264 * We attempt to make everything work anyways by:
5265 *
5266 * - raising the soft limit on per-process file descriptors beyond
5267 * 256
5268 *
5269 * - As of Solaris 10u4, we can request that Solaris raise the 256
5270 * stdio fopen limit by calling function enable_extended_FILE_stdio.
5271 * This is done in init_2 and recorded in enabled_extended_FILE_stdio
5272 *
5273 * - If we are stuck on an old (pre 10u4) Solaris system, we can
5274 * workaround the bug by remapping non-stdio file descriptors below
5275 * 256 to ones beyond 256, which is done below.
5276 *
5277 * See:
5278 * 1085341: 32-bit stdio routines should support file descriptors >255
5279 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files
5280 * 6431278: Netbeans crash on 32 bit Solaris: need to call
5281 * enable_extended_FILE_stdio() in VM initialisation
5282 * Giri Mandalika's blog
5283 * http://technopark02.blogspot.com/2005_05_01_archive.html
5284 */
5285 #ifndef _LP64
5286 if ((!enabled_extended_FILE_stdio) && fd < 256) {
5287 int newfd = ::fcntl(fd, F_DUPFD, 256);
5288 if (newfd != -1) {
5289 ::close(fd);
5290 fd = newfd;
5291 }
5292 }
5293 #endif // 32-bit Solaris
5294 /*
5295 * All file descriptors that are opened in the JVM and not
5296 * specifically destined for a subprocess should have the
5297 * close-on-exec flag set. If we don't set it, then careless 3rd
5298 * party native code might fork and exec without closing all
5299 * appropriate file descriptors (e.g. as we do in closeDescriptors in
5300 * UNIXProcess.c), and this in turn might:
5301 *
5302 * - cause end-of-file to fail to be detected on some file
5303 * descriptors, resulting in mysterious hangs, or
5304 *
5305 * - might cause an fopen in the subprocess to fail on a system
5306 * suffering from bug 1085341.
5307 *
5308 * (Yes, the default setting of the close-on-exec flag is a Unix
5309 * design flaw)
5310 *
5311 * See:
5312 * 1085341: 32-bit stdio routines should support file descriptors >255
5313 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
5314 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
5315 */
5316 #ifdef FD_CLOEXEC
5317 {
5318 int flags = ::fcntl(fd, F_GETFD);
5319 if (flags != -1)
5320 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
5321 }
5322 #endif
5323
5324 if (o_delete != 0) {
5325 ::unlink(path);
5326 }
5327 return fd;
5328 }
5329
5330 // create binary file, rewriting existing file if required
5331 int os::create_binary_file(const char* path, bool rewrite_existing) {
5332 int oflags = O_WRONLY | O_CREAT;
5333 if (!rewrite_existing) {
5334 oflags |= O_EXCL;
5335 }
5336 return ::open64(path, oflags, S_IREAD | S_IWRITE);
5337 }
5338
5339 // return current position of file pointer
5340 jlong os::current_file_offset(int fd) {
5341 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
5342 }
5343
5344 // move file pointer to the specified offset
5345 jlong os::seek_to_file_offset(int fd, jlong offset) {
5346 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
5347 }
5348
5349 jlong os::lseek(int fd, jlong offset, int whence) {
5350 return (jlong) ::lseek64(fd, offset, whence);
5351 }
5352
5353 char * os::native_path(char *path) {
5354 return path;
5355 }
5356
5357 int os::ftruncate(int fd, jlong length) {
5358 return ::ftruncate64(fd, length);
5359 }
5360
5361 int os::fsync(int fd) {
5362 RESTARTABLE_RETURN_INT(::fsync(fd));
5363 }
5364
5365 int os::available(int fd, jlong *bytes) {
5366 jlong cur, end;
5367 int mode;
5368 struct stat64 buf64;
5369
5370 if (::fstat64(fd, &buf64) >= 0) {
5371 mode = buf64.st_mode;
5372 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
5373 /*
5374 * XXX: is the following call interruptible? If so, this might
5375 * need to go through the INTERRUPT_IO() wrapper as for other
5376 * blocking, interruptible calls in this file.
5377 */
5378 int n,ioctl_return;
5379
5380 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted);
5381 if (ioctl_return>= 0) {
5382 *bytes = n;
5383 return 1;
5384 }
5385 }
5386 }
5387 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
5388 return 0;
5389 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
5390 return 0;
5391 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
5392 return 0;
5393 }
5394 *bytes = end - cur;
5395 return 1;
5396 }
5397
5398 // Map a block of memory.
5399 char* os::map_memory(int fd, const char* file_name, size_t file_offset,
5400 char *addr, size_t bytes, bool read_only,
5401 bool allow_exec) {
5402 int prot;
5403 int flags;
5404
5405 if (read_only) {
5406 prot = PROT_READ;
5407 flags = MAP_SHARED;
5408 } else {
5409 prot = PROT_READ | PROT_WRITE;
5410 flags = MAP_PRIVATE;
5411 }
5412
5413 if (allow_exec) {
5414 prot |= PROT_EXEC;
5415 }
5416
5417 if (addr != NULL) {
5418 flags |= MAP_FIXED;
5419 }
5420
5421 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5422 fd, file_offset);
5423 if (mapped_address == MAP_FAILED) {
5424 return NULL;
5425 }
5426 return mapped_address;
5427 }
5428
5429
5430 // Remap a block of memory.
5431 char* os::remap_memory(int fd, const char* file_name, size_t file_offset,
5432 char *addr, size_t bytes, bool read_only,
5433 bool allow_exec) {
5434 // same as map_memory() on this OS
5435 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5436 allow_exec);
5437 }
5438
5439
5440 // Unmap a block of memory.
5441 bool os::unmap_memory(char* addr, size_t bytes) {
5442 return munmap(addr, bytes) == 0;
5443 }
5444
5445 void os::pause() {
5446 char filename[MAX_PATH];
5447 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5448 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5449 } else {
5450 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5451 }
5452
5453 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5454 if (fd != -1) {
5455 struct stat buf;
5456 ::close(fd);
5457 while (::stat(filename, &buf) == 0) {
5458 (void)::poll(NULL, 0, 100);
5459 }
5460 } else {
5461 jio_fprintf(stderr,
5462 "Could not open pause file '%s', continuing immediately.\n", filename);
5463 }
5464 }
5465
5466 #ifndef PRODUCT
5467 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5468 // Turn this on if you need to trace synch operations.
5469 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5470 // and call record_synch_enable and record_synch_disable
5471 // around the computation of interest.
5472
5473 void record_synch(char* name, bool returning); // defined below
5474
5475 class RecordSynch {
5476 char* _name;
5477 public:
5478 RecordSynch(char* name) :_name(name)
5479 { record_synch(_name, false); }
5480 ~RecordSynch() { record_synch(_name, true); }
5481 };
5482
5483 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5484 extern "C" ret name params { \
5485 typedef ret name##_t params; \
5486 static name##_t* implem = NULL; \
5487 static int callcount = 0; \
5488 if (implem == NULL) { \
5489 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5490 if (implem == NULL) fatal(dlerror()); \
5491 } \
5492 ++callcount; \
5493 RecordSynch _rs(#name); \
5494 inner; \
5495 return implem args; \
5496 }
5497 // in dbx, examine callcounts this way:
5498 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5499
5500 #define CHECK_POINTER_OK(p) \
5501 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p)))
5502 #define CHECK_MU \
5503 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5504 #define CHECK_CV \
5505 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5506 #define CHECK_P(p) \
5507 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5508
5509 #define CHECK_MUTEX(mutex_op) \
5510 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5511
5512 CHECK_MUTEX( mutex_lock)
5513 CHECK_MUTEX( _mutex_lock)
5514 CHECK_MUTEX( mutex_unlock)
5515 CHECK_MUTEX(_mutex_unlock)
5516 CHECK_MUTEX( mutex_trylock)
5517 CHECK_MUTEX(_mutex_trylock)
5518
5519 #define CHECK_COND(cond_op) \
5520 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
5521
5522 CHECK_COND( cond_wait);
5523 CHECK_COND(_cond_wait);
5524 CHECK_COND(_cond_wait_cancel);
5525
5526 #define CHECK_COND2(cond_op) \
5527 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
5528
5529 CHECK_COND2( cond_timedwait);
5530 CHECK_COND2(_cond_timedwait);
5531 CHECK_COND2(_cond_timedwait_cancel);
5532
5533 // do the _lwp_* versions too
5534 #define mutex_t lwp_mutex_t
5535 #define cond_t lwp_cond_t
5536 CHECK_MUTEX( _lwp_mutex_lock)
5537 CHECK_MUTEX( _lwp_mutex_unlock)
5538 CHECK_MUTEX( _lwp_mutex_trylock)
5539 CHECK_MUTEX( __lwp_mutex_lock)
5540 CHECK_MUTEX( __lwp_mutex_unlock)
5541 CHECK_MUTEX( __lwp_mutex_trylock)
5542 CHECK_MUTEX(___lwp_mutex_lock)
5543 CHECK_MUTEX(___lwp_mutex_unlock)
5544
5545 CHECK_COND( _lwp_cond_wait);
5546 CHECK_COND( __lwp_cond_wait);
5547 CHECK_COND(___lwp_cond_wait);
5548
5549 CHECK_COND2( _lwp_cond_timedwait);
5550 CHECK_COND2( __lwp_cond_timedwait);
5551 #undef mutex_t
5552 #undef cond_t
5553
5554 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5555 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5556 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5557 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5558 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5559 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5560 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5561 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5562
5563
5564 // recording machinery:
5565
5566 enum { RECORD_SYNCH_LIMIT = 200 };
5567 char* record_synch_name[RECORD_SYNCH_LIMIT];
5568 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5569 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5570 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5571 int record_synch_count = 0;
5572 bool record_synch_enabled = false;
5573
5574 // in dbx, examine recorded data this way:
5575 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5576
5577 void record_synch(char* name, bool returning) {
5578 if (record_synch_enabled) {
5579 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5580 record_synch_name[record_synch_count] = name;
5581 record_synch_returning[record_synch_count] = returning;
5582 record_synch_thread[record_synch_count] = thr_self();
5583 record_synch_arg0ptr[record_synch_count] = &name;
5584 record_synch_count++;
5585 }
5586 // put more checking code here:
5587 // ...
5588 }
5589 }
5590
5591 void record_synch_enable() {
5592 // start collecting trace data, if not already doing so
5593 if (!record_synch_enabled) record_synch_count = 0;
5594 record_synch_enabled = true;
5595 }
5596
5597 void record_synch_disable() {
5598 // stop collecting trace data
5599 record_synch_enabled = false;
5600 }
5601
5602 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5603 #endif // PRODUCT
5604
5605 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5606 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5607 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5608
5609
5610 // JVMTI & JVM monitoring and management support
5611 // The thread_cpu_time() and current_thread_cpu_time() are only
5612 // supported if is_thread_cpu_time_supported() returns true.
5613 // They are not supported on Solaris T1.
5614
5615 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5616 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5617 // of a thread.
5618 //
5619 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5620 // returns the fast estimate available on the platform.
5621
5622 // hrtime_t gethrvtime() return value includes
5623 // user time but does not include system time
5624 jlong os::current_thread_cpu_time() {
5625 return (jlong) gethrvtime();
5626 }
5627
5628 jlong os::thread_cpu_time(Thread *thread) {
5629 // return user level CPU time only to be consistent with
5630 // what current_thread_cpu_time returns.
5631 // thread_cpu_time_info() must be changed if this changes
5632 return os::thread_cpu_time(thread, false /* user time only */);
5633 }
5634
5635 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5636 if (user_sys_cpu_time) {
5637 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5638 } else {
5639 return os::current_thread_cpu_time();
5640 }
5641 }
5642
5643 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5644 char proc_name[64];
5645 int count;
5646 prusage_t prusage;
5647 jlong lwp_time;
5648 int fd;
5649
5650 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5651 getpid(),
5652 thread->osthread()->lwp_id());
5653 fd = ::open(proc_name, O_RDONLY);
5654 if ( fd == -1 ) return -1;
5655
5656 do {
5657 count = ::pread(fd,
5658 (void *)&prusage.pr_utime,
5659 thr_time_size,
5660 thr_time_off);
5661 } while (count < 0 && errno == EINTR);
5662 ::close(fd);
5663 if ( count < 0 ) return -1;
5664
5665 if (user_sys_cpu_time) {
5666 // user + system CPU time
5667 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5668 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5669 (jlong)prusage.pr_stime.tv_nsec +
5670 (jlong)prusage.pr_utime.tv_nsec;
5671 } else {
5672 // user level CPU time only
5673 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5674 (jlong)prusage.pr_utime.tv_nsec;
5675 }
5676
5677 return(lwp_time);
5678 }
5679
5680 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5681 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5682 info_ptr->may_skip_backward = false; // elapsed time not wall time
5683 info_ptr->may_skip_forward = false; // elapsed time not wall time
5684 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5685 }
5686
5687 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5688 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5689 info_ptr->may_skip_backward = false; // elapsed time not wall time
5690 info_ptr->may_skip_forward = false; // elapsed time not wall time
5691 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5692 }
5693
5694 bool os::is_thread_cpu_time_supported() {
5695 if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
5696 return true;
5697 } else {
5698 return false;
5699 }
5700 }
5701
5702 // System loadavg support. Returns -1 if load average cannot be obtained.
5703 // Return the load average for our processor set if the primitive exists
5704 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5705 int os::loadavg(double loadavg[], int nelem) {
5706 if (pset_getloadavg_ptr != NULL) {
5707 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5708 } else {
5709 return ::getloadavg(loadavg, nelem);
5710 }
5711 }
5712
5713 //---------------------------------------------------------------------------------
5714
5715 static address same_page(address x, address y) {
5716 intptr_t page_bits = -os::vm_page_size();
5717 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
5718 return x;
5719 else if (x > y)
5720 return (address)(intptr_t(y) | ~page_bits) + 1;
5721 else
5722 return (address)(intptr_t(y) & page_bits);
5723 }
5724
5725 bool os::find(address addr, outputStream* st) {
5726 Dl_info dlinfo;
5727 memset(&dlinfo, 0, sizeof(dlinfo));
5728 if (dladdr(addr, &dlinfo)) {
5729 #ifdef _LP64
5730 st->print("0x%016lx: ", addr);
5731 #else
5732 st->print("0x%08x: ", addr);
5733 #endif
5734 if (dlinfo.dli_sname != NULL)
5735 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5736 else if (dlinfo.dli_fname)
5737 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5738 else
5739 st->print("<absolute address>");
5740 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname);
5741 #ifdef _LP64
5742 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase);
5743 #else
5744 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase);
5745 #endif
5746 st->cr();
5747
5748 if (Verbose) {
5749 // decode some bytes around the PC
5750 address begin = same_page(addr-40, addr);
5751 address end = same_page(addr+40, addr);
5752 address lowest = (address) dlinfo.dli_sname;
5753 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5754 if (begin < lowest) begin = lowest;
5755 Dl_info dlinfo2;
5756 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
5757 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
5758 end = (address) dlinfo2.dli_saddr;
5759 Disassembler::decode(begin, end, st);
5760 }
5761 return true;
5762 }
5763 return false;
5764 }
5765
5766 // Following function has been added to support HotSparc's libjvm.so running
5767 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5768 // src/solaris/hpi/native_threads in the EVM codebase.
5769 //
5770 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5771 // libraries and should thus be removed. We will leave it behind for a while
5772 // until we no longer want to able to run on top of 1.3.0 Solaris production
5773 // JDK. See 4341971.
5774
5775 #define STACK_SLACK 0x800
5776
5777 extern "C" {
5778 intptr_t sysThreadAvailableStackWithSlack() {
5779 stack_t st;
5780 intptr_t retval, stack_top;
5781 retval = thr_stksegment(&st);
5782 assert(retval == 0, "incorrect return value from thr_stksegment");
5783 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5784 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5785 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5786 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5787 }
5788 }
5789
5790 // Just to get the Kernel build to link on solaris for testing.
5791
5792 extern "C" {
5793 class ASGCT_CallTrace;
5794 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext)
5795 KERNEL_RETURN;
5796 }
5797
5798
5799 // ObjectMonitor park-unpark infrastructure ...
5800 //
5801 // We implement Solaris and Linux PlatformEvents with the
5802 // obvious condvar-mutex-flag triple.
5803 // Another alternative that works quite well is pipes:
5804 // Each PlatformEvent consists of a pipe-pair.
5805 // The thread associated with the PlatformEvent
5806 // calls park(), which reads from the input end of the pipe.
5807 // Unpark() writes into the other end of the pipe.
5808 // The write-side of the pipe must be set NDELAY.
5809 // Unfortunately pipes consume a large # of handles.
5810 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5811 // Using pipes for the 1st few threads might be workable, however.
5812 //
5813 // park() is permitted to return spuriously.
5814 // Callers of park() should wrap the call to park() in
5815 // an appropriate loop. A litmus test for the correct
5816 // usage of park is the following: if park() were modified
5817 // to immediately return 0 your code should still work,
5818 // albeit degenerating to a spin loop.
5819 //
5820 // An interesting optimization for park() is to use a trylock()
5821 // to attempt to acquire the mutex. If the trylock() fails
5822 // then we know that a concurrent unpark() operation is in-progress.
5823 // in that case the park() code could simply set _count to 0
5824 // and return immediately. The subsequent park() operation *might*
5825 // return immediately. That's harmless as the caller of park() is
5826 // expected to loop. By using trylock() we will have avoided a
5827 // avoided a context switch caused by contention on the per-thread mutex.
5828 //
5829 // TODO-FIXME:
5830 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5831 // objectmonitor implementation.
5832 // 2. Collapse the JSR166 parker event, and the
5833 // objectmonitor ParkEvent into a single "Event" construct.
5834 // 3. In park() and unpark() add:
5835 // assert (Thread::current() == AssociatedWith).
5836 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5837 // 1-out-of-N park() operations will return immediately.
5838 //
5839 // _Event transitions in park()
5840 // -1 => -1 : illegal
5841 // 1 => 0 : pass - return immediately
5842 // 0 => -1 : block
5843 //
5844 // _Event serves as a restricted-range semaphore.
5845 //
5846 // Another possible encoding of _Event would be with
5847 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5848 //
5849 // TODO-FIXME: add DTRACE probes for:
5850 // 1. Tx parks
5851 // 2. Ty unparks Tx
5852 // 3. Tx resumes from park
5853
5854
5855 // value determined through experimentation
5856 #define ROUNDINGFIX 11
5857
5858 // utility to compute the abstime argument to timedwait.
5859 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5860
5861 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5862 // millis is the relative timeout time
5863 // abstime will be the absolute timeout time
5864 if (millis < 0) millis = 0;
5865 struct timeval now;
5866 int status = gettimeofday(&now, NULL);
5867 assert(status == 0, "gettimeofday");
5868 jlong seconds = millis / 1000;
5869 jlong max_wait_period;
5870
5871 if (UseLWPSynchronization) {
5872 // forward port of fix for 4275818 (not sleeping long enough)
5873 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5874 // _lwp_cond_timedwait() used a round_down algorithm rather
5875 // than a round_up. For millis less than our roundfactor
5876 // it rounded down to 0 which doesn't meet the spec.
5877 // For millis > roundfactor we may return a bit sooner, but
5878 // since we can not accurately identify the patch level and
5879 // this has already been fixed in Solaris 9 and 8 we will
5880 // leave it alone rather than always rounding down.
5881
5882 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5883 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5884 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5885 max_wait_period = 21000000;
5886 } else {
5887 max_wait_period = 50000000;
5888 }
5889 millis %= 1000;
5890 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5891 seconds = max_wait_period;
5892 }
5893 abstime->tv_sec = now.tv_sec + seconds;
5894 long usec = now.tv_usec + millis * 1000;
5895 if (usec >= 1000000) {
5896 abstime->tv_sec += 1;
5897 usec -= 1000000;
5898 }
5899 abstime->tv_nsec = usec * 1000;
5900 return abstime;
5901 }
5902
5903 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
5904 // Conceptually TryPark() should be equivalent to park(0).
5905
5906 int os::PlatformEvent::TryPark() {
5907 for (;;) {
5908 const int v = _Event ;
5909 guarantee ((v == 0) || (v == 1), "invariant") ;
5910 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
5911 }
5912 }
5913
5914 void os::PlatformEvent::park() { // AKA: down()
5915 // Invariant: Only the thread associated with the Event/PlatformEvent
5916 // may call park().
5917 int v ;
5918 for (;;) {
5919 v = _Event ;
5920 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5921 }
5922 guarantee (v >= 0, "invariant") ;
5923 if (v == 0) {
5924 // Do this the hard way by blocking ...
5925 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5926 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
5927 // Only for SPARC >= V8PlusA
5928 #if defined(__sparc) && defined(COMPILER2)
5929 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5930 #endif
5931 int status = os::Solaris::mutex_lock(_mutex);
5932 assert_status(status == 0, status, "mutex_lock");
5933 guarantee (_nParked == 0, "invariant") ;
5934 ++ _nParked ;
5935 while (_Event < 0) {
5936 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5937 // Treat this the same as if the wait was interrupted
5938 // With usr/lib/lwp going to kernel, always handle ETIME
5939 status = os::Solaris::cond_wait(_cond, _mutex);
5940 if (status == ETIME) status = EINTR ;
5941 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5942 }
5943 -- _nParked ;
5944 _Event = 0 ;
5945 status = os::Solaris::mutex_unlock(_mutex);
5946 assert_status(status == 0, status, "mutex_unlock");
5947 }
5948 }
5949
5950 int os::PlatformEvent::park(jlong millis) {
5951 guarantee (_nParked == 0, "invariant") ;
5952 int v ;
5953 for (;;) {
5954 v = _Event ;
5955 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
5956 }
5957 guarantee (v >= 0, "invariant") ;
5958 if (v != 0) return OS_OK ;
5959
5960 int ret = OS_TIMEOUT;
5961 timestruc_t abst;
5962 compute_abstime (&abst, millis);
5963
5964 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5965 // For Solaris SPARC set fprs.FEF=0 prior to parking.
5966 // Only for SPARC >= V8PlusA
5967 #if defined(__sparc) && defined(COMPILER2)
5968 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
5969 #endif
5970 int status = os::Solaris::mutex_lock(_mutex);
5971 assert_status(status == 0, status, "mutex_lock");
5972 guarantee (_nParked == 0, "invariant") ;
5973 ++ _nParked ;
5974 while (_Event < 0) {
5975 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5976 assert_status(status == 0 || status == EINTR ||
5977 status == ETIME || status == ETIMEDOUT,
5978 status, "cond_timedwait");
5979 if (!FilterSpuriousWakeups) break ; // previous semantics
5980 if (status == ETIME || status == ETIMEDOUT) break ;
5981 // We consume and ignore EINTR and spurious wakeups.
5982 }
5983 -- _nParked ;
5984 if (_Event >= 0) ret = OS_OK ;
5985 _Event = 0 ;
5986 status = os::Solaris::mutex_unlock(_mutex);
5987 assert_status(status == 0, status, "mutex_unlock");
5988 return ret;
5989 }
5990
5991 void os::PlatformEvent::unpark() {
5992 int v, AnyWaiters;
5993
5994 // Increment _Event.
5995 // Another acceptable implementation would be to simply swap 1
5996 // into _Event:
5997 // if (Swap (&_Event, 1) < 0) {
5998 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ;
5999 // if (AnyWaiters) cond_signal (_cond) ;
6000 // }
6001
6002 for (;;) {
6003 v = _Event ;
6004 if (v > 0) {
6005 // The LD of _Event could have reordered or be satisfied
6006 // by a read-aside from this processor's write buffer.
6007 // To avoid problems execute a barrier and then
6008 // ratify the value. A degenerate CAS() would also work.
6009 // Viz., CAS (v+0, &_Event, v) == v).
6010 OrderAccess::fence() ;
6011 if (_Event == v) return ;
6012 continue ;
6013 }
6014 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
6015 }
6016
6017 // If the thread associated with the event was parked, wake it.
6018 if (v < 0) {
6019 int status ;
6020 // Wait for the thread assoc with the PlatformEvent to vacate.
6021 status = os::Solaris::mutex_lock(_mutex);
6022 assert_status(status == 0, status, "mutex_lock");
6023 AnyWaiters = _nParked ;
6024 status = os::Solaris::mutex_unlock(_mutex);
6025 assert_status(status == 0, status, "mutex_unlock");
6026 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ;
6027 if (AnyWaiters != 0) {
6028 // We intentional signal *after* dropping the lock
6029 // to avoid a common class of futile wakeups.
6030 status = os::Solaris::cond_signal(_cond);
6031 assert_status(status == 0, status, "cond_signal");
6032 }
6033 }
6034 }
6035
6036 // JSR166
6037 // -------------------------------------------------------
6038
6039 /*
6040 * The solaris and linux implementations of park/unpark are fairly
6041 * conservative for now, but can be improved. They currently use a
6042 * mutex/condvar pair, plus _counter.
6043 * Park decrements _counter if > 0, else does a condvar wait. Unpark
6044 * sets count to 1 and signals condvar. Only one thread ever waits
6045 * on the condvar. Contention seen when trying to park implies that someone
6046 * is unparking you, so don't wait. And spurious returns are fine, so there
6047 * is no need to track notifications.
6048 */
6049
6050 #define NANOSECS_PER_SEC 1000000000
6051 #define NANOSECS_PER_MILLISEC 1000000
6052 #define MAX_SECS 100000000
6053
6054 /*
6055 * This code is common to linux and solaris and will be moved to a
6056 * common place in dolphin.
6057 *
6058 * The passed in time value is either a relative time in nanoseconds
6059 * or an absolute time in milliseconds. Either way it has to be unpacked
6060 * into suitable seconds and nanoseconds components and stored in the
6061 * given timespec structure.
6062 * Given time is a 64-bit value and the time_t used in the timespec is only
6063 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
6064 * overflow if times way in the future are given. Further on Solaris versions
6065 * prior to 10 there is a restriction (see cond_timedwait) that the specified
6066 * number of seconds, in abstime, is less than current_time + 100,000,000.
6067 * As it will be 28 years before "now + 100000000" will overflow we can
6068 * ignore overflow and just impose a hard-limit on seconds using the value
6069 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
6070 * years from "now".
6071 */
6072 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
6073 assert (time > 0, "convertTime");
6074
6075 struct timeval now;
6076 int status = gettimeofday(&now, NULL);
6077 assert(status == 0, "gettimeofday");
6078
6079 time_t max_secs = now.tv_sec + MAX_SECS;
6080
6081 if (isAbsolute) {
6082 jlong secs = time / 1000;
6083 if (secs > max_secs) {
6084 absTime->tv_sec = max_secs;
6085 }
6086 else {
6087 absTime->tv_sec = secs;
6088 }
6089 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
6090 }
6091 else {
6092 jlong secs = time / NANOSECS_PER_SEC;
6093 if (secs >= MAX_SECS) {
6094 absTime->tv_sec = max_secs;
6095 absTime->tv_nsec = 0;
6096 }
6097 else {
6098 absTime->tv_sec = now.tv_sec + secs;
6099 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
6100 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
6101 absTime->tv_nsec -= NANOSECS_PER_SEC;
6102 ++absTime->tv_sec; // note: this must be <= max_secs
6103 }
6104 }
6105 }
6106 assert(absTime->tv_sec >= 0, "tv_sec < 0");
6107 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
6108 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
6109 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
6110 }
6111
6112 void Parker::park(bool isAbsolute, jlong time) {
6113
6114 // Optional fast-path check:
6115 // Return immediately if a permit is available.
6116 if (_counter > 0) {
6117 _counter = 0 ;
6118 OrderAccess::fence();
6119 return ;
6120 }
6121
6122 // Optional fast-exit: Check interrupt before trying to wait
6123 Thread* thread = Thread::current();
6124 assert(thread->is_Java_thread(), "Must be JavaThread");
6125 JavaThread *jt = (JavaThread *)thread;
6126 if (Thread::is_interrupted(thread, false)) {
6127 return;
6128 }
6129
6130 // First, demultiplex/decode time arguments
6131 timespec absTime;
6132 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
6133 return;
6134 }
6135 if (time > 0) {
6136 // Warning: this code might be exposed to the old Solaris time
6137 // round-down bugs. Grep "roundingFix" for details.
6138 unpackTime(&absTime, isAbsolute, time);
6139 }
6140
6141 // Enter safepoint region
6142 // Beware of deadlocks such as 6317397.
6143 // The per-thread Parker:: _mutex is a classic leaf-lock.
6144 // In particular a thread must never block on the Threads_lock while
6145 // holding the Parker:: mutex. If safepoints are pending both the
6146 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
6147 ThreadBlockInVM tbivm(jt);
6148
6149 // Don't wait if cannot get lock since interference arises from
6150 // unblocking. Also. check interrupt before trying wait
6151 if (Thread::is_interrupted(thread, false) ||
6152 os::Solaris::mutex_trylock(_mutex) != 0) {
6153 return;
6154 }
6155
6156 int status ;
6157
6158 if (_counter > 0) { // no wait needed
6159 _counter = 0;
6160 status = os::Solaris::mutex_unlock(_mutex);
6161 assert (status == 0, "invariant") ;
6162 OrderAccess::fence();
6163 return;
6164 }
6165
6166 #ifdef ASSERT
6167 // Don't catch signals while blocked; let the running threads have the signals.
6168 // (This allows a debugger to break into the running thread.)
6169 sigset_t oldsigs;
6170 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
6171 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
6172 #endif
6173
6174 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
6175 jt->set_suspend_equivalent();
6176 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
6177
6178 // Do this the hard way by blocking ...
6179 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6180 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6181 // Only for SPARC >= V8PlusA
6182 #if defined(__sparc) && defined(COMPILER2)
6183 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6184 #endif
6185
6186 if (time == 0) {
6187 status = os::Solaris::cond_wait (_cond, _mutex) ;
6188 } else {
6189 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
6190 }
6191 // Note that an untimed cond_wait() can sometimes return ETIME on older
6192 // versions of the Solaris.
6193 assert_status(status == 0 || status == EINTR ||
6194 status == ETIME || status == ETIMEDOUT,
6195 status, "cond_timedwait");
6196
6197 #ifdef ASSERT
6198 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
6199 #endif
6200 _counter = 0 ;
6201 status = os::Solaris::mutex_unlock(_mutex);
6202 assert_status(status == 0, status, "mutex_unlock") ;
6203
6204 // If externally suspended while waiting, re-suspend
6205 if (jt->handle_special_suspend_equivalent_condition()) {
6206 jt->java_suspend_self();
6207 }
6208 OrderAccess::fence();
6209 }
6210
6211 void Parker::unpark() {
6212 int s, status ;
6213 status = os::Solaris::mutex_lock (_mutex) ;
6214 assert (status == 0, "invariant") ;
6215 s = _counter;
6216 _counter = 1;
6217 status = os::Solaris::mutex_unlock (_mutex) ;
6218 assert (status == 0, "invariant") ;
6219
6220 if (s < 1) {
6221 status = os::Solaris::cond_signal (_cond) ;
6222 assert (status == 0, "invariant") ;
6223 }
6224 }
6225
6226 extern char** environ;
6227
6228 // Run the specified command in a separate process. Return its exit value,
6229 // or -1 on failure (e.g. can't fork a new process).
6230 // Unlike system(), this function can be called from signal handler. It
6231 // doesn't block SIGINT et al.
6232 int os::fork_and_exec(char* cmd) {
6233 char * argv[4];
6234 argv[0] = (char *)"sh";
6235 argv[1] = (char *)"-c";
6236 argv[2] = cmd;
6237 argv[3] = NULL;
6238
6239 // fork is async-safe, fork1 is not so can't use in signal handler
6240 pid_t pid;
6241 Thread* t = ThreadLocalStorage::get_thread_slow();
6242 if (t != NULL && t->is_inside_signal_handler()) {
6243 pid = fork();
6244 } else {
6245 pid = fork1();
6246 }
6247
6248 if (pid < 0) {
6249 // fork failed
6250 warning("fork failed: %s", strerror(errno));
6251 return -1;
6252
6253 } else if (pid == 0) {
6254 // child process
6255
6256 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
6257 execve("/usr/bin/sh", argv, environ);
6258
6259 // execve failed
6260 _exit(-1);
6261
6262 } else {
6263 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
6264 // care about the actual exit code, for now.
6265
6266 int status;
6267
6268 // Wait for the child process to exit. This returns immediately if
6269 // the child has already exited. */
6270 while (waitpid(pid, &status, 0) < 0) {
6271 switch (errno) {
6272 case ECHILD: return 0;
6273 case EINTR: break;
6274 default: return -1;
6275 }
6276 }
6277
6278 if (WIFEXITED(status)) {
6279 // The child exited normally; get its exit code.
6280 return WEXITSTATUS(status);
6281 } else if (WIFSIGNALED(status)) {
6282 // The child exited because of a signal
6283 // The best value to return is 0x80 + signal number,
6284 // because that is what all Unix shells do, and because
6285 // it allows callers to distinguish between process exit and
6286 // process death by signal.
6287 return 0x80 + WTERMSIG(status);
6288 } else {
6289 // Unknown exit code; pass it through
6290 return status;
6291 }
6292 }
6293 }
6294
6295 // is_headless_jre()
6296 //
6297 // Test for the existence of libmawt in motif21 or xawt directories
6298 // in order to report if we are running in a headless jre
6299 //
6300 bool os::is_headless_jre() {
6301 struct stat statbuf;
6302 char buf[MAXPATHLEN];
6303 char libmawtpath[MAXPATHLEN];
6304 const char *xawtstr = "/xawt/libmawt.so";
6305 const char *motifstr = "/motif21/libmawt.so";
6306 char *p;
6307
6308 // Get path to libjvm.so
6309 os::jvm_path(buf, sizeof(buf));
6310
6311 // Get rid of libjvm.so
6312 p = strrchr(buf, '/');
6313 if (p == NULL) return false;
6314 else *p = '\0';
6315
6316 // Get rid of client or server
6317 p = strrchr(buf, '/');
6318 if (p == NULL) return false;
6319 else *p = '\0';
6320
6321 // check xawt/libmawt.so
6322 strcpy(libmawtpath, buf);
6323 strcat(libmawtpath, xawtstr);
6324 if (::stat(libmawtpath, &statbuf) == 0) return false;
6325
6326 // check motif21/libmawt.so
6327 strcpy(libmawtpath, buf);
6328 strcat(libmawtpath, motifstr);
6329 if (::stat(libmawtpath, &statbuf) == 0) return false;
6330
6331 return true;
6332 }
6333
6334 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
6335 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted);
6336 }
6337
6338 int os::close(int fd) {
6339 RESTARTABLE_RETURN_INT(::close(fd));
6340 }
6341
6342 int os::socket_close(int fd) {
6343 RESTARTABLE_RETURN_INT(::close(fd));
6344 }
6345
6346 int os::recv(int fd, char *buf, int nBytes, int flags) {
6347 INTERRUPTIBLE_RETURN_INT(::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6348 }
6349
6350
6351 int os::send(int fd, char *buf, int nBytes, int flags) {
6352 INTERRUPTIBLE_RETURN_INT(::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6353 }
6354
6355 int os::raw_send(int fd, char *buf, int nBytes, int flags) {
6356 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
6357 }
6358
6359 // As both poll and select can be interrupted by signals, we have to be
6360 // prepared to restart the system call after updating the timeout, unless
6361 // a poll() is done with timeout == -1, in which case we repeat with this
6362 // "wait forever" value.
6363
6364 int os::timeout(int fd, long timeout) {
6365 int res;
6366 struct timeval t;
6367 julong prevtime, newtime;
6368 static const char* aNull = 0;
6369 struct pollfd pfd;
6370 pfd.fd = fd;
6371 pfd.events = POLLIN;
6372
6373 gettimeofday(&t, &aNull);
6374 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
6375
6376 for(;;) {
6377 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted);
6378 if(res == OS_ERR && errno == EINTR) {
6379 if(timeout != -1) {
6380 gettimeofday(&t, &aNull);
6381 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000;
6382 timeout -= newtime - prevtime;
6383 if(timeout <= 0)
6384 return OS_OK;
6385 prevtime = newtime;
6386 }
6387 } else return res;
6388 }
6389 }
6390
6391 int os::connect(int fd, struct sockaddr *him, int len) {
6392 int _result;
6393 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,
6394 os::Solaris::clear_interrupted);
6395
6396 // Depending on when thread interruption is reset, _result could be
6397 // one of two values when errno == EINTR
6398
6399 if (((_result == OS_INTRPT) || (_result == OS_ERR))
6400 && (errno == EINTR)) {
6401 /* restarting a connect() changes its errno semantics */
6402 INTERRUPTIBLE(::connect(fd, him, len), _result,
6403 os::Solaris::clear_interrupted);
6404 /* undo these changes */
6405 if (_result == OS_ERR) {
6406 if (errno == EALREADY) {
6407 errno = EINPROGRESS; /* fall through */
6408 } else if (errno == EISCONN) {
6409 errno = 0;
6410 return OS_OK;
6411 }
6412 }
6413 }
6414 return _result;
6415 }
6416
6417 int os::accept(int fd, struct sockaddr *him, int *len) {
6418 if (fd < 0)
6419 return OS_ERR;
6420 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him,\
6421 (socklen_t*) len), os::Solaris::clear_interrupted);
6422 }
6423
6424 int os::recvfrom(int fd, char *buf, int nBytes, int flags,
6425 sockaddr *from, int *fromlen) {
6426 //%%note jvm_r11
6427 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes,\
6428 flags, from, fromlen), os::Solaris::clear_interrupted);
6429 }
6430
6431 int os::sendto(int fd, char *buf, int len, int flags,
6432 struct sockaddr *to, int tolen) {
6433 //%%note jvm_r11
6434 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags,\
6435 to, tolen), os::Solaris::clear_interrupted);
6436 }
6437
6438 int os::socket_available(int fd, jint *pbytes) {
6439 if (fd < 0)
6440 return OS_OK;
6441
6442 int ret;
6443
6444 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
6445
6446 //%% note ioctl can return 0 when successful, JVM_SocketAvailable
6447 // is expected to return 0 on failure and 1 on success to the jdk.
6448
6449 return (ret == OS_ERR) ? 0 : 1;
6450 }
6451
6452
6453 int os::bind(int fd, struct sockaddr *him, int len) {
6454 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\
6455 os::Solaris::clear_interrupted);
6456 }