1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // no precompiled headers
26 #include "classfile/classLoader.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/icBuffer.hpp"
30 #include "code/vtableStubs.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "jvm_solaris.h"
34 #include "memory/allocation.inline.hpp"
35 #include "memory/filemap.hpp"
36 #include "mutex_solaris.inline.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "os_share_solaris.hpp"
39 #include "prims/jniFastGetField.hpp"
40 #include "prims/jvm.h"
41 #include "prims/jvm_misc.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/extendedPC.hpp"
44 #include "runtime/globals.hpp"
45 #include "runtime/interfaceSupport.hpp"
46 #include "runtime/java.hpp"
47 #include "runtime/javaCalls.hpp"
48 #include "runtime/mutexLocker.hpp"
49 #include "runtime/objectMonitor.hpp"
50 #include "runtime/osThread.hpp"
51 #include "runtime/perfMemory.hpp"
52 #include "runtime/sharedRuntime.hpp"
53 #include "runtime/statSampler.hpp"
54 #include "runtime/stubRoutines.hpp"
55 #include "runtime/threadCritical.hpp"
56 #include "runtime/timer.hpp"
57 #include "services/attachListener.hpp"
58 #include "services/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
74 // put OS-includes here
75 # include <dlfcn.h>
76 # include <errno.h>
77 # include <exception>
78 # include <link.h>
79 # include <poll.h>
80 # include <pthread.h>
81 # include <pwd.h>
82 # include <schedctl.h>
83 # include <setjmp.h>
84 # include <signal.h>
85 # include <stdio.h>
86 # include <alloca.h>
87 # include <sys/filio.h>
88 # include <sys/ipc.h>
89 # include <sys/lwp.h>
90 # include <sys/machelf.h> // for elf Sym structure used by dladdr1
91 # include <sys/mman.h>
92 # include <sys/processor.h>
93 # include <sys/procset.h>
94 # include <sys/pset.h>
95 # include <sys/resource.h>
96 # include <sys/shm.h>
97 # include <sys/socket.h>
98 # include <sys/stat.h>
99 # include <sys/systeminfo.h>
100 # include <sys/time.h>
101 # include <sys/times.h>
102 # include <sys/types.h>
103 # include <sys/wait.h>
104 # include <sys/utsname.h>
105 # include <thread.h>
106 # include <unistd.h>
107 # include <sys/priocntl.h>
108 # include <sys/rtpriocntl.h>
109 # include <sys/tspriocntl.h>
110 # include <sys/iapriocntl.h>
111 # include <sys/fxpriocntl.h>
112 # include <sys/loadavg.h>
113 # include <string.h>
114 # include <stdio.h>
115
116 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later
117 # include <sys/procfs.h> // see comment in <sys/procfs.h>
118
119 #define MAX_PATH (2 * K)
120
121 // for timer info max values which include all bits
122 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
123
124 #ifdef _GNU_SOURCE
125 // See bug #6514594
126 extern "C" int madvise(caddr_t, size_t, int);
127 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg,
128 int attr, int mask);
129 #endif //_GNU_SOURCE
130
131 /*
132 MPSS Changes Start.
133 The JVM binary needs to be built and run on pre-Solaris 9
134 systems, but the constants needed by MPSS are only in Solaris 9
135 header files. They are textually replicated here to allow
136 building on earlier systems. Once building on Solaris 8 is
137 no longer a requirement, these #defines can be replaced by ordinary
138 system .h inclusion.
139
140 In earlier versions of the JDK and Solaris, we used ISM for large pages.
141 But ISM requires shared memory to achieve this and thus has many caveats.
142 MPSS is a fully transparent and is a cleaner way to get large pages.
143 Although we still require keeping ISM for backward compatiblitiy as well as
144 giving the opportunity to use large pages on older systems it is
145 recommended that MPSS be used for Solaris 9 and above.
146
147 */
148
149 #ifndef MC_HAT_ADVISE
150
151 struct memcntl_mha {
152 uint_t mha_cmd; /* command(s) */
153 uint_t mha_flags;
154 size_t mha_pagesize;
155 };
156 #define MC_HAT_ADVISE 7 /* advise hat map size */
157 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */
158 #define MAP_ALIGN 0x200 /* addr specifies alignment */
159
160 #endif
161 // MPSS Changes End.
162
163
164 // Here are some liblgrp types from sys/lgrp_user.h to be able to
165 // compile on older systems without this header file.
166
167 #ifndef MADV_ACCESS_LWP
168 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
169 #endif
170 #ifndef MADV_ACCESS_MANY
171 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */
172 #endif
173
174 #ifndef LGRP_RSRC_CPU
175 # define LGRP_RSRC_CPU 0 /* CPU resources */
176 #endif
177 #ifndef LGRP_RSRC_MEM
178 # define LGRP_RSRC_MEM 1 /* memory resources */
179 #endif
180
181 // Some more macros from sys/mman.h that are not present in Solaris 8.
182
183 #ifndef MAX_MEMINFO_CNT
184 /*
185 * info_req request type definitions for meminfo
186 * request types starting with MEMINFO_V are used for Virtual addresses
187 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical
188 * addresses
189 */
190 # define MEMINFO_SHIFT 16
191 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT)
192 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */
193 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */
194 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */
195 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */
196 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */
197 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */
198 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */
199
200 /* maximum number of addresses meminfo() can process at a time */
201 # define MAX_MEMINFO_CNT 256
202
203 /* maximum number of request types */
204 # define MAX_MEMINFO_REQ 31
205 #endif
206
207 // see thr_setprio(3T) for the basis of these numbers
208 #define MinimumPriority 0
209 #define NormalPriority 64
210 #define MaximumPriority 127
211
212 // Values for ThreadPriorityPolicy == 1
213 int prio_policy1[CriticalPriority+1] = {
214 -99999, 0, 16, 32, 48, 64,
215 80, 96, 112, 124, 127, 127 };
216
217 // System parameters used internally
218 static clock_t clock_tics_per_sec = 100;
219
220 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
221 static bool enabled_extended_FILE_stdio = false;
222
223 // For diagnostics to print a message once. see run_periodic_checks
224 static bool check_addr0_done = false;
225 static sigset_t check_signal_done;
226 static bool check_signals = true;
227
228 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
229 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
230
231 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
232
233
234 // "default" initializers for missing libc APIs
235 extern "C" {
236 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
237 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
238
239 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
240 static int lwp_cond_destroy(cond_t *cv) { return 0; }
241 }
242
243 // "default" initializers for pthread-based synchronization
244 extern "C" {
245 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
246 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
247 }
248
249 // Thread Local Storage
250 // This is common to all Solaris platforms so it is defined here,
251 // in this common file.
252 // The declarations are in the os_cpu threadLS*.hpp files.
253 //
254 // Static member initialization for TLS
255 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL};
256
257 #ifndef PRODUCT
258 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d))
259
260 int ThreadLocalStorage::_tcacheHit = 0;
261 int ThreadLocalStorage::_tcacheMiss = 0;
262
263 void ThreadLocalStorage::print_statistics() {
264 int total = _tcacheMiss+_tcacheHit;
265 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n",
266 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total));
267 }
268 #undef _PCT
269 #endif // PRODUCT
270
271 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id,
272 int index) {
273 Thread *thread = get_thread_slow();
274 if (thread != NULL) {
275 address sp = os::current_stack_pointer();
276 guarantee(thread->_stack_base == NULL ||
277 (sp <= thread->_stack_base &&
278 sp >= thread->_stack_base - thread->_stack_size) ||
279 is_error_reported(),
280 "sp must be inside of selected thread stack");
281
282 thread->set_self_raw_id(raw_id); // mark for quick retrieval
283 _get_thread_cache[ index ] = thread;
284 }
285 return thread;
286 }
287
288
289 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0};
290 #define NO_CACHED_THREAD ((Thread*)all_zero)
291
292 void ThreadLocalStorage::pd_set_thread(Thread* thread) {
293
294 // Store the new value before updating the cache to prevent a race
295 // between get_thread_via_cache_slowly() and this store operation.
296 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread);
297
298 // Update thread cache with new thread if setting on thread create,
299 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit.
300 uintptr_t raw = pd_raw_thread_id();
301 int ix = pd_cache_index(raw);
302 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread;
303 }
304
305 void ThreadLocalStorage::pd_init() {
306 for (int i = 0; i < _pd_cache_size; i++) {
307 _get_thread_cache[i] = NO_CACHED_THREAD;
308 }
309 }
310
311 // Invalidate all the caches (happens to be the same as pd_init).
312 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); }
313
314 #undef NO_CACHED_THREAD
315
316 // END Thread Local Storage
317
318 static inline size_t adjust_stack_size(address base, size_t size) {
319 if ((ssize_t)size < 0) {
320 // 4759953: Compensate for ridiculous stack size.
321 size = max_intx;
322 }
323 if (size > (size_t)base) {
324 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
325 size = (size_t)base;
326 }
327 return size;
328 }
329
330 static inline stack_t get_stack_info() {
331 stack_t st;
332 int retval = thr_stksegment(&st);
333 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
334 assert(retval == 0, "incorrect return value from thr_stksegment");
335 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
336 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
337 return st;
338 }
339
340 address os::current_stack_base() {
341 int r = thr_main() ;
342 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
343 bool is_primordial_thread = r;
344
345 // Workaround 4352906, avoid calls to thr_stksegment by
346 // thr_main after the first one (it looks like we trash
347 // some data, causing the value for ss_sp to be incorrect).
348 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
349 stack_t st = get_stack_info();
350 if (is_primordial_thread) {
351 // cache initial value of stack base
352 os::Solaris::_main_stack_base = (address)st.ss_sp;
353 }
354 return (address)st.ss_sp;
355 } else {
356 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
357 return os::Solaris::_main_stack_base;
358 }
359 }
360
361 size_t os::current_stack_size() {
362 size_t size;
363
364 int r = thr_main() ;
365 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
366 if(!r) {
367 size = get_stack_info().ss_size;
368 } else {
369 struct rlimit limits;
370 getrlimit(RLIMIT_STACK, &limits);
371 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
372 }
373 // base may not be page aligned
374 address base = current_stack_base();
375 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());;
376 return (size_t)(base - bottom);
377 }
378
379 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
380 return localtime_r(clock, res);
381 }
382
383 // interruptible infrastructure
384
385 // setup_interruptible saves the thread state before going into an
386 // interruptible system call.
387 // The saved state is used to restore the thread to
388 // its former state whether or not an interrupt is received.
389 // Used by classloader os::read
390 // os::restartable_read calls skip this layer and stay in _thread_in_native
391
392 void os::Solaris::setup_interruptible(JavaThread* thread) {
393
394 JavaThreadState thread_state = thread->thread_state();
395
396 assert(thread_state != _thread_blocked, "Coming from the wrong thread");
397 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible");
398 OSThread* osthread = thread->osthread();
399 osthread->set_saved_interrupt_thread_state(thread_state);
400 thread->frame_anchor()->make_walkable(thread);
401 ThreadStateTransition::transition(thread, thread_state, _thread_blocked);
402 }
403
404 // Version of setup_interruptible() for threads that are already in
405 // _thread_blocked. Used by os_sleep().
406 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) {
407 thread->frame_anchor()->make_walkable(thread);
408 }
409
410 JavaThread* os::Solaris::setup_interruptible() {
411 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
412 setup_interruptible(thread);
413 return thread;
414 }
415
416 void os::Solaris::try_enable_extended_io() {
417 typedef int (*enable_extended_FILE_stdio_t)(int, int);
418
419 if (!UseExtendedFileIO) {
420 return;
421 }
422
423 enable_extended_FILE_stdio_t enabler =
424 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
425 "enable_extended_FILE_stdio");
426 if (enabler) {
427 enabler(-1, -1);
428 }
429 }
430
431
432 #ifdef ASSERT
433
434 JavaThread* os::Solaris::setup_interruptible_native() {
435 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread();
436 JavaThreadState thread_state = thread->thread_state();
437 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
438 return thread;
439 }
440
441 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) {
442 JavaThreadState thread_state = thread->thread_state();
443 assert(thread_state == _thread_in_native, "Assumed thread_in_native");
444 }
445 #endif
446
447 // cleanup_interruptible reverses the effects of setup_interruptible
448 // setup_interruptible_already_blocked() does not need any cleanup.
449
450 void os::Solaris::cleanup_interruptible(JavaThread* thread) {
451 OSThread* osthread = thread->osthread();
452
453 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state());
454 }
455
456 // I/O interruption related counters called in _INTERRUPTIBLE
457
458 void os::Solaris::bump_interrupted_before_count() {
459 RuntimeService::record_interrupted_before_count();
460 }
461
462 void os::Solaris::bump_interrupted_during_count() {
463 RuntimeService::record_interrupted_during_count();
464 }
465
466 static int _processors_online = 0;
467
468 jint os::Solaris::_os_thread_limit = 0;
469 volatile jint os::Solaris::_os_thread_count = 0;
470
471 julong os::available_memory() {
472 return Solaris::available_memory();
473 }
474
475 julong os::Solaris::available_memory() {
476 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
477 }
478
479 julong os::Solaris::_physical_memory = 0;
480
481 julong os::physical_memory() {
482 return Solaris::physical_memory();
483 }
484
485 julong os::allocatable_physical_memory(julong size) {
486 #ifdef _LP64
487 return size;
488 #else
489 julong result = MIN2(size, (julong)3835*M);
490 if (!is_allocatable(result)) {
491 // Memory allocations will be aligned but the alignment
492 // is not known at this point. Alignments will
493 // be at most to LargePageSizeInBytes. Protect
494 // allocations from alignments up to illegal
495 // values. If at this point 2G is illegal.
496 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes;
497 result = MIN2(size, reasonable_size);
498 }
499 return result;
500 #endif
501 }
502
503 static hrtime_t first_hrtime = 0;
504 static const hrtime_t hrtime_hz = 1000*1000*1000;
505 const int LOCK_BUSY = 1;
506 const int LOCK_FREE = 0;
507 const int LOCK_INVALID = -1;
508 static volatile hrtime_t max_hrtime = 0;
509 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress
510
511
512 void os::Solaris::initialize_system_info() {
513 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
514 _processors_online = sysconf (_SC_NPROCESSORS_ONLN);
515 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
516 }
517
518 int os::active_processor_count() {
519 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
520 pid_t pid = getpid();
521 psetid_t pset = PS_NONE;
522 // Are we running in a processor set or is there any processor set around?
523 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
524 uint_t pset_cpus;
525 // Query the number of cpus available to us.
526 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
527 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
528 _processors_online = pset_cpus;
529 return pset_cpus;
530 }
531 }
532 // Otherwise return number of online cpus
533 return online_cpus;
534 }
535
536 static bool find_processors_in_pset(psetid_t pset,
537 processorid_t** id_array,
538 uint_t* id_length) {
539 bool result = false;
540 // Find the number of processors in the processor set.
541 if (pset_info(pset, NULL, id_length, NULL) == 0) {
542 // Make up an array to hold their ids.
543 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
544 // Fill in the array with their processor ids.
545 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
546 result = true;
547 }
548 }
549 return result;
550 }
551
552 // Callers of find_processors_online() must tolerate imprecise results --
553 // the system configuration can change asynchronously because of DR
554 // or explicit psradm operations.
555 //
556 // We also need to take care that the loop (below) terminates as the
557 // number of processors online can change between the _SC_NPROCESSORS_ONLN
558 // request and the loop that builds the list of processor ids. Unfortunately
559 // there's no reliable way to determine the maximum valid processor id,
560 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
561 // man pages, which claim the processor id set is "sparse, but
562 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
563 // exit the loop.
564 //
565 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
566 // not available on S8.0.
567
568 static bool find_processors_online(processorid_t** id_array,
569 uint* id_length) {
570 const processorid_t MAX_PROCESSOR_ID = 100000 ;
571 // Find the number of processors online.
572 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
573 // Make up an array to hold their ids.
574 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
575 // Processors need not be numbered consecutively.
576 long found = 0;
577 processorid_t next = 0;
578 while (found < *id_length && next < MAX_PROCESSOR_ID) {
579 processor_info_t info;
580 if (processor_info(next, &info) == 0) {
581 // NB, PI_NOINTR processors are effectively online ...
582 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
583 (*id_array)[found] = next;
584 found += 1;
585 }
586 }
587 next += 1;
588 }
589 if (found < *id_length) {
590 // The loop above didn't identify the expected number of processors.
591 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
592 // and re-running the loop, above, but there's no guarantee of progress
593 // if the system configuration is in flux. Instead, we just return what
594 // we've got. Note that in the worst case find_processors_online() could
595 // return an empty set. (As a fall-back in the case of the empty set we
596 // could just return the ID of the current processor).
597 *id_length = found ;
598 }
599
600 return true;
601 }
602
603 static bool assign_distribution(processorid_t* id_array,
604 uint id_length,
605 uint* distribution,
606 uint distribution_length) {
607 // We assume we can assign processorid_t's to uint's.
608 assert(sizeof(processorid_t) == sizeof(uint),
609 "can't convert processorid_t to uint");
610 // Quick check to see if we won't succeed.
611 if (id_length < distribution_length) {
612 return false;
613 }
614 // Assign processor ids to the distribution.
615 // Try to shuffle processors to distribute work across boards,
616 // assuming 4 processors per board.
617 const uint processors_per_board = ProcessDistributionStride;
618 // Find the maximum processor id.
619 processorid_t max_id = 0;
620 for (uint m = 0; m < id_length; m += 1) {
621 max_id = MAX2(max_id, id_array[m]);
622 }
623 // The next id, to limit loops.
624 const processorid_t limit_id = max_id + 1;
625 // Make up markers for available processors.
626 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
627 for (uint c = 0; c < limit_id; c += 1) {
628 available_id[c] = false;
629 }
630 for (uint a = 0; a < id_length; a += 1) {
631 available_id[id_array[a]] = true;
632 }
633 // Step by "boards", then by "slot", copying to "assigned".
634 // NEEDS_CLEANUP: The assignment of processors should be stateful,
635 // remembering which processors have been assigned by
636 // previous calls, etc., so as to distribute several
637 // independent calls of this method. What we'd like is
638 // It would be nice to have an API that let us ask
639 // how many processes are bound to a processor,
640 // but we don't have that, either.
641 // In the short term, "board" is static so that
642 // subsequent distributions don't all start at board 0.
643 static uint board = 0;
644 uint assigned = 0;
645 // Until we've found enough processors ....
646 while (assigned < distribution_length) {
647 // ... find the next available processor in the board.
648 for (uint slot = 0; slot < processors_per_board; slot += 1) {
649 uint try_id = board * processors_per_board + slot;
650 if ((try_id < limit_id) && (available_id[try_id] == true)) {
651 distribution[assigned] = try_id;
652 available_id[try_id] = false;
653 assigned += 1;
654 break;
655 }
656 }
657 board += 1;
658 if (board * processors_per_board + 0 >= limit_id) {
659 board = 0;
660 }
661 }
662 if (available_id != NULL) {
663 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal);
664 }
665 return true;
666 }
667
668 void os::set_native_thread_name(const char *name) {
669 // Not yet implemented.
670 return;
671 }
672
673 bool os::distribute_processes(uint length, uint* distribution) {
674 bool result = false;
675 // Find the processor id's of all the available CPUs.
676 processorid_t* id_array = NULL;
677 uint id_length = 0;
678 // There are some races between querying information and using it,
679 // since processor sets can change dynamically.
680 psetid_t pset = PS_NONE;
681 // Are we running in a processor set?
682 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
683 result = find_processors_in_pset(pset, &id_array, &id_length);
684 } else {
685 result = find_processors_online(&id_array, &id_length);
686 }
687 if (result == true) {
688 if (id_length >= length) {
689 result = assign_distribution(id_array, id_length, distribution, length);
690 } else {
691 result = false;
692 }
693 }
694 if (id_array != NULL) {
695 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal);
696 }
697 return result;
698 }
699
700 bool os::bind_to_processor(uint processor_id) {
701 // We assume that a processorid_t can be stored in a uint.
702 assert(sizeof(uint) == sizeof(processorid_t),
703 "can't convert uint to processorid_t");
704 int bind_result =
705 processor_bind(P_LWPID, // bind LWP.
706 P_MYID, // bind current LWP.
707 (processorid_t) processor_id, // id.
708 NULL); // don't return old binding.
709 return (bind_result == 0);
710 }
711
712 bool os::getenv(const char* name, char* buffer, int len) {
713 char* val = ::getenv( name );
714 if ( val == NULL
715 || strlen(val) + 1 > len ) {
716 if (len > 0) buffer[0] = 0; // return a null string
717 return false;
718 }
719 strcpy( buffer, val );
720 return true;
721 }
722
723
724 // Return true if user is running as root.
725
726 bool os::have_special_privileges() {
727 static bool init = false;
728 static bool privileges = false;
729 if (!init) {
730 privileges = (getuid() != geteuid()) || (getgid() != getegid());
731 init = true;
732 }
733 return privileges;
734 }
735
736
737 void os::init_system_properties_values() {
738 char arch[12];
739 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch));
740
741 // The next steps are taken in the product version:
742 //
743 // Obtain the JAVA_HOME value from the location of libjvm[_g].so.
744 // This library should be located at:
745 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so.
746 //
747 // If "/jre/lib/" appears at the right place in the path, then we
748 // assume libjvm[_g].so is installed in a JDK and we use this path.
749 //
750 // Otherwise exit with message: "Could not create the Java virtual machine."
751 //
752 // The following extra steps are taken in the debugging version:
753 //
754 // If "/jre/lib/" does NOT appear at the right place in the path
755 // instead of exit check for $JAVA_HOME environment variable.
756 //
757 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
758 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so
759 // it looks like libjvm[_g].so is installed there
760 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so.
761 //
762 // Otherwise exit.
763 //
764 // Important note: if the location of libjvm.so changes this
765 // code needs to be changed accordingly.
766
767 // The next few definitions allow the code to be verbatim:
768 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal)
769 #define free(p) FREE_C_HEAP_ARRAY(char, p, mtInternal)
770 #define getenv(n) ::getenv(n)
771
772 #define EXTENSIONS_DIR "/lib/ext"
773 #define ENDORSED_DIR "/lib/endorsed"
774 #define COMMON_DIR "/usr/jdk/packages"
775
776 {
777 /* sysclasspath, java_home, dll_dir */
778 {
779 char *home_path;
780 char *dll_path;
781 char *pslash;
782 char buf[MAXPATHLEN];
783 os::jvm_path(buf, sizeof(buf));
784
785 // Found the full path to libjvm.so.
786 // Now cut the path to <java_home>/jre if we can.
787 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */
788 pslash = strrchr(buf, '/');
789 if (pslash != NULL)
790 *pslash = '\0'; /* get rid of /{client|server|hotspot} */
791 dll_path = malloc(strlen(buf) + 1);
792 if (dll_path == NULL)
793 return;
794 strcpy(dll_path, buf);
795 Arguments::set_dll_dir(dll_path);
796
797 if (pslash != NULL) {
798 pslash = strrchr(buf, '/');
799 if (pslash != NULL) {
800 *pslash = '\0'; /* get rid of /<arch> */
801 pslash = strrchr(buf, '/');
802 if (pslash != NULL)
803 *pslash = '\0'; /* get rid of /lib */
804 }
805 }
806
807 home_path = malloc(strlen(buf) + 1);
808 if (home_path == NULL)
809 return;
810 strcpy(home_path, buf);
811 Arguments::set_java_home(home_path);
812
813 if (!set_boot_path('/', ':'))
814 return;
815 }
816
817 /*
818 * Where to look for native libraries
819 */
820 {
821 // Use dlinfo() to determine the correct java.library.path.
822 //
823 // If we're launched by the Java launcher, and the user
824 // does not set java.library.path explicitly on the commandline,
825 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
826 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
827 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
828 // /usr/lib), which is exactly what we want.
829 //
830 // If the user does set java.library.path, it completely
831 // overwrites this setting, and always has.
832 //
833 // If we're not launched by the Java launcher, we may
834 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
835 // settings. Again, dlinfo does exactly what we want.
836
837 Dl_serinfo _info, *info = &_info;
838 Dl_serpath *path;
839 char* library_path;
840 char *common_path;
841 int i;
842
843 // determine search path count and required buffer size
844 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
845 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
846 }
847
848 // allocate new buffer and initialize
849 info = (Dl_serinfo*)malloc(_info.dls_size);
850 if (info == NULL) {
851 vm_exit_out_of_memory(_info.dls_size,
852 "init_system_properties_values info");
853 }
854 info->dls_size = _info.dls_size;
855 info->dls_cnt = _info.dls_cnt;
856
857 // obtain search path information
858 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
859 free(info);
860 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
861 }
862
863 path = &info->dls_serpath[0];
864
865 // Note: Due to a legacy implementation, most of the library path
866 // is set in the launcher. This was to accomodate linking restrictions
867 // on legacy Solaris implementations (which are no longer supported).
868 // Eventually, all the library path setting will be done here.
869 //
870 // However, to prevent the proliferation of improperly built native
871 // libraries, the new path component /usr/jdk/packages is added here.
872
873 // Determine the actual CPU architecture.
874 char cpu_arch[12];
875 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
876 #ifdef _LP64
877 // If we are a 64-bit vm, perform the following translations:
878 // sparc -> sparcv9
879 // i386 -> amd64
880 if (strcmp(cpu_arch, "sparc") == 0)
881 strcat(cpu_arch, "v9");
882 else if (strcmp(cpu_arch, "i386") == 0)
883 strcpy(cpu_arch, "amd64");
884 #endif
885
886 // Construct the invariant part of ld_library_path. Note that the
887 // space for the colon and the trailing null are provided by the
888 // nulls included by the sizeof operator.
889 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch);
890 common_path = malloc(bufsize);
891 if (common_path == NULL) {
892 free(info);
893 vm_exit_out_of_memory(bufsize,
894 "init_system_properties_values common_path");
895 }
896 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch);
897
898 // struct size is more than sufficient for the path components obtained
899 // through the dlinfo() call, so only add additional space for the path
900 // components explicitly added here.
901 bufsize = info->dls_size + strlen(common_path);
902 library_path = malloc(bufsize);
903 if (library_path == NULL) {
904 free(info);
905 free(common_path);
906 vm_exit_out_of_memory(bufsize,
907 "init_system_properties_values library_path");
908 }
909 library_path[0] = '\0';
910
911 // Construct the desired Java library path from the linker's library
912 // search path.
913 //
914 // For compatibility, it is optimal that we insert the additional path
915 // components specific to the Java VM after those components specified
916 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
917 // infrastructure.
918 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it
919 strcpy(library_path, common_path);
920 } else {
921 int inserted = 0;
922 for (i = 0; i < info->dls_cnt; i++, path++) {
923 uint_t flags = path->dls_flags & LA_SER_MASK;
924 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
925 strcat(library_path, common_path);
926 strcat(library_path, os::path_separator());
927 inserted = 1;
928 }
929 strcat(library_path, path->dls_name);
930 strcat(library_path, os::path_separator());
931 }
932 // eliminate trailing path separator
933 library_path[strlen(library_path)-1] = '\0';
934 }
935
936 // happens before argument parsing - can't use a trace flag
937 // tty->print_raw("init_system_properties_values: native lib path: ");
938 // tty->print_raw_cr(library_path);
939
940 // callee copies into its own buffer
941 Arguments::set_library_path(library_path);
942
943 free(common_path);
944 free(library_path);
945 free(info);
946 }
947
948 /*
949 * Extensions directories.
950 *
951 * Note that the space for the colon and the trailing null are provided
952 * by the nulls included by the sizeof operator (so actually one byte more
953 * than necessary is allocated).
954 */
955 {
956 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) +
957 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) +
958 sizeof(EXTENSIONS_DIR));
959 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR,
960 Arguments::get_java_home());
961 Arguments::set_ext_dirs(buf);
962 }
963
964 /* Endorsed standards default directory. */
965 {
966 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR));
967 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
968 Arguments::set_endorsed_dirs(buf);
969 }
970 }
971
972 #undef malloc
973 #undef free
974 #undef getenv
975 #undef EXTENSIONS_DIR
976 #undef ENDORSED_DIR
977 #undef COMMON_DIR
978
979 }
980
981 void os::breakpoint() {
982 BREAKPOINT;
983 }
984
985 bool os::obsolete_option(const JavaVMOption *option)
986 {
987 if (!strncmp(option->optionString, "-Xt", 3)) {
988 return true;
989 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
990 return true;
991 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
992 return true;
993 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
994 return true;
995 }
996 return false;
997 }
998
999 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
1000 address stackStart = (address)thread->stack_base();
1001 address stackEnd = (address)(stackStart - (address)thread->stack_size());
1002 if (sp < stackStart && sp >= stackEnd ) return true;
1003 return false;
1004 }
1005
1006 extern "C" void breakpoint() {
1007 // use debugger to set breakpoint here
1008 }
1009
1010 static thread_t main_thread;
1011
1012 // Thread start routine for all new Java threads
1013 extern "C" void* java_start(void* thread_addr) {
1014 // Try to randomize the cache line index of hot stack frames.
1015 // This helps when threads of the same stack traces evict each other's
1016 // cache lines. The threads can be either from the same JVM instance, or
1017 // from different JVM instances. The benefit is especially true for
1018 // processors with hyperthreading technology.
1019 static int counter = 0;
1020 int pid = os::current_process_id();
1021 alloca(((pid ^ counter++) & 7) * 128);
1022
1023 int prio;
1024 Thread* thread = (Thread*)thread_addr;
1025 OSThread* osthr = thread->osthread();
1026
1027 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound
1028 thread->_schedctl = (void *) schedctl_init () ;
1029
1030 if (UseNUMA) {
1031 int lgrp_id = os::numa_get_group_id();
1032 if (lgrp_id != -1) {
1033 thread->set_lgrp_id(lgrp_id);
1034 }
1035 }
1036
1037 // If the creator called set priority before we started,
1038 // we need to call set_native_priority now that we have an lwp.
1039 // We used to get the priority from thr_getprio (we called
1040 // thr_setprio way back in create_thread) and pass it to
1041 // set_native_priority, but Solaris scales the priority
1042 // in java_to_os_priority, so when we read it back here,
1043 // we pass trash to set_native_priority instead of what's
1044 // in java_to_os_priority. So we save the native priority
1045 // in the osThread and recall it here.
1046
1047 if ( osthr->thread_id() != -1 ) {
1048 if ( UseThreadPriorities ) {
1049 int prio = osthr->native_priority();
1050 if (ThreadPriorityVerbose) {
1051 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
1052 INTPTR_FORMAT ", setting priority: %d\n",
1053 osthr->thread_id(), osthr->lwp_id(), prio);
1054 }
1055 os::set_native_priority(thread, prio);
1056 }
1057 } else if (ThreadPriorityVerbose) {
1058 warning("Can't set priority in _start routine, thread id hasn't been set\n");
1059 }
1060
1061 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
1062
1063 // initialize signal mask for this thread
1064 os::Solaris::hotspot_sigmask(thread);
1065
1066 thread->run();
1067
1068 // One less thread is executing
1069 // When the VMThread gets here, the main thread may have already exited
1070 // which frees the CodeHeap containing the Atomic::dec code
1071 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
1072 Atomic::dec(&os::Solaris::_os_thread_count);
1073 }
1074
1075 if (UseDetachedThreads) {
1076 thr_exit(NULL);
1077 ShouldNotReachHere();
1078 }
1079 return NULL;
1080 }
1081
1082 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
1083 // Allocate the OSThread object
1084 OSThread* osthread = new OSThread(NULL, NULL);
1085 if (osthread == NULL) return NULL;
1086
1087 // Store info on the Solaris thread into the OSThread
1088 osthread->set_thread_id(thread_id);
1089 osthread->set_lwp_id(_lwp_self());
1090 thread->_schedctl = (void *) schedctl_init () ;
1091
1092 if (UseNUMA) {
1093 int lgrp_id = os::numa_get_group_id();
1094 if (lgrp_id != -1) {
1095 thread->set_lgrp_id(lgrp_id);
1096 }
1097 }
1098
1099 if ( ThreadPriorityVerbose ) {
1100 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
1101 osthread->thread_id(), osthread->lwp_id() );
1102 }
1103
1104 // Initial thread state is INITIALIZED, not SUSPENDED
1105 osthread->set_state(INITIALIZED);
1106
1107 return osthread;
1108 }
1109
1110 void os::Solaris::hotspot_sigmask(Thread* thread) {
1111
1112 //Save caller's signal mask
1113 sigset_t sigmask;
1114 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask);
1115 OSThread *osthread = thread->osthread();
1116 osthread->set_caller_sigmask(sigmask);
1117
1118 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
1119 if (!ReduceSignalUsage) {
1120 if (thread->is_VM_thread()) {
1121 // Only the VM thread handles BREAK_SIGNAL ...
1122 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL);
1123 } else {
1124 // ... all other threads block BREAK_SIGNAL
1125 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
1126 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL);
1127 }
1128 }
1129 }
1130
1131 bool os::create_attached_thread(JavaThread* thread) {
1132 #ifdef ASSERT
1133 thread->verify_not_published();
1134 #endif
1135 OSThread* osthread = create_os_thread(thread, thr_self());
1136 if (osthread == NULL) {
1137 return false;
1138 }
1139
1140 // Initial thread state is RUNNABLE
1141 osthread->set_state(RUNNABLE);
1142 thread->set_osthread(osthread);
1143
1144 // initialize signal mask for this thread
1145 // and save the caller's signal mask
1146 os::Solaris::hotspot_sigmask(thread);
1147
1148 return true;
1149 }
1150
1151 bool os::create_main_thread(JavaThread* thread) {
1152 #ifdef ASSERT
1153 thread->verify_not_published();
1154 #endif
1155 if (_starting_thread == NULL) {
1156 _starting_thread = create_os_thread(thread, main_thread);
1157 if (_starting_thread == NULL) {
1158 return false;
1159 }
1160 }
1161
1162 // The primodial thread is runnable from the start
1163 _starting_thread->set_state(RUNNABLE);
1164
1165 thread->set_osthread(_starting_thread);
1166
1167 // initialize signal mask for this thread
1168 // and save the caller's signal mask
1169 os::Solaris::hotspot_sigmask(thread);
1170
1171 return true;
1172 }
1173
1174 // _T2_libthread is true if we believe we are running with the newer
1175 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default)
1176 bool os::Solaris::_T2_libthread = false;
1177
1178 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
1179 // Allocate the OSThread object
1180 OSThread* osthread = new OSThread(NULL, NULL);
1181 if (osthread == NULL) {
1182 return false;
1183 }
1184
1185 if ( ThreadPriorityVerbose ) {
1186 char *thrtyp;
1187 switch ( thr_type ) {
1188 case vm_thread:
1189 thrtyp = (char *)"vm";
1190 break;
1191 case cgc_thread:
1192 thrtyp = (char *)"cgc";
1193 break;
1194 case pgc_thread:
1195 thrtyp = (char *)"pgc";
1196 break;
1197 case java_thread:
1198 thrtyp = (char *)"java";
1199 break;
1200 case compiler_thread:
1201 thrtyp = (char *)"compiler";
1202 break;
1203 case watcher_thread:
1204 thrtyp = (char *)"watcher";
1205 break;
1206 default:
1207 thrtyp = (char *)"unknown";
1208 break;
1209 }
1210 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
1211 }
1212
1213 // Calculate stack size if it's not specified by caller.
1214 if (stack_size == 0) {
1215 // The default stack size 1M (2M for LP64).
1216 stack_size = (BytesPerWord >> 2) * K * K;
1217
1218 switch (thr_type) {
1219 case os::java_thread:
1220 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
1221 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create();
1222 break;
1223 case os::compiler_thread:
1224 if (CompilerThreadStackSize > 0) {
1225 stack_size = (size_t)(CompilerThreadStackSize * K);
1226 break;
1227 } // else fall through:
1228 // use VMThreadStackSize if CompilerThreadStackSize is not defined
1229 case os::vm_thread:
1230 case os::pgc_thread:
1231 case os::cgc_thread:
1232 case os::watcher_thread:
1233 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
1234 break;
1235 }
1236 }
1237 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed);
1238
1239 // Initial state is ALLOCATED but not INITIALIZED
1240 osthread->set_state(ALLOCATED);
1241
1242 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
1243 // We got lots of threads. Check if we still have some address space left.
1244 // Need to be at least 5Mb of unreserved address space. We do check by
1245 // trying to reserve some.
1246 const size_t VirtualMemoryBangSize = 20*K*K;
1247 char* mem = os::reserve_memory(VirtualMemoryBangSize);
1248 if (mem == NULL) {
1249 delete osthread;
1250 return false;
1251 } else {
1252 // Release the memory again
1253 os::release_memory(mem, VirtualMemoryBangSize);
1254 }
1255 }
1256
1257 // Setup osthread because the child thread may need it.
1258 thread->set_osthread(osthread);
1259
1260 // Create the Solaris thread
1261 // explicit THR_BOUND for T2_libthread case in case
1262 // that assumption is not accurate, but our alternate signal stack
1263 // handling is based on it which must have bound threads
1264 thread_t tid = 0;
1265 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED
1266 | ((UseBoundThreads || os::Solaris::T2_libthread() ||
1267 (thr_type == vm_thread) ||
1268 (thr_type == cgc_thread) ||
1269 (thr_type == pgc_thread) ||
1270 (thr_type == compiler_thread && BackgroundCompilation)) ?
1271 THR_BOUND : 0);
1272 int status;
1273
1274 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs.
1275 //
1276 // On multiprocessors systems, libthread sometimes under-provisions our
1277 // process with LWPs. On a 30-way systems, for instance, we could have
1278 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned
1279 // to our process. This can result in under utilization of PEs.
1280 // I suspect the problem is related to libthread's LWP
1281 // pool management and to the kernel's SIGBLOCKING "last LWP parked"
1282 // upcall policy.
1283 //
1284 // The following code is palliative -- it attempts to ensure that our
1285 // process has sufficient LWPs to take advantage of multiple PEs.
1286 // Proper long-term cures include using user-level threads bound to LWPs
1287 // (THR_BOUND) or using LWP-based synchronization. Note that there is a
1288 // slight timing window with respect to sampling _os_thread_count, but
1289 // the race is benign. Also, we should periodically recompute
1290 // _processors_online as the min of SC_NPROCESSORS_ONLN and the
1291 // the number of PEs in our partition. You might be tempted to use
1292 // THR_NEW_LWP here, but I'd recommend against it as that could
1293 // result in undesirable growth of the libthread's LWP pool.
1294 // The fix below isn't sufficient; for instance, it doesn't take into count
1295 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks.
1296 //
1297 // Some pathologies this scheme doesn't handle:
1298 // * Threads can block, releasing the LWPs. The LWPs can age out.
1299 // When a large number of threads become ready again there aren't
1300 // enough LWPs available to service them. This can occur when the
1301 // number of ready threads oscillates.
1302 // * LWPs/Threads park on IO, thus taking the LWP out of circulation.
1303 //
1304 // Finally, we should call thr_setconcurrency() periodically to refresh
1305 // the LWP pool and thwart the LWP age-out mechanism.
1306 // The "+3" term provides a little slop -- we want to slightly overprovision.
1307
1308 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) {
1309 if (!(flags & THR_BOUND)) {
1310 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation
1311 }
1312 }
1313 // Although this doesn't hurt, we should warn of undefined behavior
1314 // when using unbound T1 threads with schedctl(). This should never
1315 // happen, as the compiler and VM threads are always created bound
1316 DEBUG_ONLY(
1317 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) &&
1318 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) &&
1319 ((thr_type == vm_thread) || (thr_type == cgc_thread) ||
1320 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) {
1321 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound");
1322 }
1323 );
1324
1325
1326 // Mark that we don't have an lwp or thread id yet.
1327 // In case we attempt to set the priority before the thread starts.
1328 osthread->set_lwp_id(-1);
1329 osthread->set_thread_id(-1);
1330
1331 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid);
1332 if (status != 0) {
1333 if (PrintMiscellaneous && (Verbose || WizardMode)) {
1334 perror("os::create_thread");
1335 }
1336 thread->set_osthread(NULL);
1337 // Need to clean up stuff we've allocated so far
1338 delete osthread;
1339 return false;
1340 }
1341
1342 Atomic::inc(&os::Solaris::_os_thread_count);
1343
1344 // Store info on the Solaris thread into the OSThread
1345 osthread->set_thread_id(tid);
1346
1347 // Remember that we created this thread so we can set priority on it
1348 osthread->set_vm_created();
1349
1350 // Set the default thread priority. If using bound threads, setting
1351 // lwp priority will be delayed until thread start.
1352 set_native_priority(thread,
1353 DefaultThreadPriority == -1 ?
1354 java_to_os_priority[NormPriority] :
1355 DefaultThreadPriority);
1356
1357 // Initial thread state is INITIALIZED, not SUSPENDED
1358 osthread->set_state(INITIALIZED);
1359
1360 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1361 return true;
1362 }
1363
1364 /* defined for >= Solaris 10. This allows builds on earlier versions
1365 * of Solaris to take advantage of the newly reserved Solaris JVM signals
1366 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2
1367 * and -XX:+UseAltSigs does nothing since these should have no conflict
1368 */
1369 #if !defined(SIGJVM1)
1370 #define SIGJVM1 39
1371 #define SIGJVM2 40
1372 #endif
1373
1374 debug_only(static bool signal_sets_initialized = false);
1375 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
1376 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL;
1377 int os::Solaris::_SIGasync = ASYNC_SIGNAL;
1378
1379 bool os::Solaris::is_sig_ignored(int sig) {
1380 struct sigaction oact;
1381 sigaction(sig, (struct sigaction*)NULL, &oact);
1382 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
1383 : CAST_FROM_FN_PTR(void*, oact.sa_handler);
1384 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
1385 return true;
1386 else
1387 return false;
1388 }
1389
1390 // Note: SIGRTMIN is a macro that calls sysconf() so it will
1391 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime
1392 static bool isJVM1available() {
1393 return SIGJVM1 < SIGRTMIN;
1394 }
1395
1396 void os::Solaris::signal_sets_init() {
1397 // Should also have an assertion stating we are still single-threaded.
1398 assert(!signal_sets_initialized, "Already initialized");
1399 // Fill in signals that are necessarily unblocked for all threads in
1400 // the VM. Currently, we unblock the following signals:
1401 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1402 // by -Xrs (=ReduceSignalUsage));
1403 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1404 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1405 // the dispositions or masks wrt these signals.
1406 // Programs embedding the VM that want to use the above signals for their
1407 // own purposes must, at this time, use the "-Xrs" option to prevent
1408 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1409 // (See bug 4345157, and other related bugs).
1410 // In reality, though, unblocking these signals is really a nop, since
1411 // these signals are not blocked by default.
1412 sigemptyset(&unblocked_sigs);
1413 sigemptyset(&allowdebug_blocked_sigs);
1414 sigaddset(&unblocked_sigs, SIGILL);
1415 sigaddset(&unblocked_sigs, SIGSEGV);
1416 sigaddset(&unblocked_sigs, SIGBUS);
1417 sigaddset(&unblocked_sigs, SIGFPE);
1418
1419 if (isJVM1available) {
1420 os::Solaris::set_SIGinterrupt(SIGJVM1);
1421 os::Solaris::set_SIGasync(SIGJVM2);
1422 } else if (UseAltSigs) {
1423 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL);
1424 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
1425 } else {
1426 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL);
1427 os::Solaris::set_SIGasync(ASYNC_SIGNAL);
1428 }
1429
1430 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt());
1431 sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
1432
1433 if (!ReduceSignalUsage) {
1434 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1435 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1436 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
1437 }
1438 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1439 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1440 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
1441 }
1442 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1443 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1444 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
1445 }
1446 }
1447 // Fill in signals that are blocked by all but the VM thread.
1448 sigemptyset(&vm_sigs);
1449 if (!ReduceSignalUsage)
1450 sigaddset(&vm_sigs, BREAK_SIGNAL);
1451 debug_only(signal_sets_initialized = true);
1452
1453 // For diagnostics only used in run_periodic_checks
1454 sigemptyset(&check_signal_done);
1455 }
1456
1457 // These are signals that are unblocked while a thread is running Java.
1458 // (For some reason, they get blocked by default.)
1459 sigset_t* os::Solaris::unblocked_signals() {
1460 assert(signal_sets_initialized, "Not initialized");
1461 return &unblocked_sigs;
1462 }
1463
1464 // These are the signals that are blocked while a (non-VM) thread is
1465 // running Java. Only the VM thread handles these signals.
1466 sigset_t* os::Solaris::vm_signals() {
1467 assert(signal_sets_initialized, "Not initialized");
1468 return &vm_sigs;
1469 }
1470
1471 // These are signals that are blocked during cond_wait to allow debugger in
1472 sigset_t* os::Solaris::allowdebug_blocked_signals() {
1473 assert(signal_sets_initialized, "Not initialized");
1474 return &allowdebug_blocked_sigs;
1475 }
1476
1477
1478 void _handle_uncaught_cxx_exception() {
1479 VMError err("An uncaught C++ exception");
1480 err.report_and_die();
1481 }
1482
1483
1484 // First crack at OS-specific initialization, from inside the new thread.
1485 void os::initialize_thread(Thread* thr) {
1486 int r = thr_main() ;
1487 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
1488 if (r) {
1489 JavaThread* jt = (JavaThread *)thr;
1490 assert(jt != NULL,"Sanity check");
1491 size_t stack_size;
1492 address base = jt->stack_base();
1493 if (Arguments::created_by_java_launcher()) {
1494 // Use 2MB to allow for Solaris 7 64 bit mode.
1495 stack_size = JavaThread::stack_size_at_create() == 0
1496 ? 2048*K : JavaThread::stack_size_at_create();
1497
1498 // There are rare cases when we may have already used more than
1499 // the basic stack size allotment before this method is invoked.
1500 // Attempt to allow for a normally sized java_stack.
1501 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1502 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1503 } else {
1504 // 6269555: If we were not created by a Java launcher, i.e. if we are
1505 // running embedded in a native application, treat the primordial thread
1506 // as much like a native attached thread as possible. This means using
1507 // the current stack size from thr_stksegment(), unless it is too large
1508 // to reliably setup guard pages. A reasonable max size is 8MB.
1509 size_t current_size = current_stack_size();
1510 // This should never happen, but just in case....
1511 if (current_size == 0) current_size = 2 * K * K;
1512 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1513 }
1514 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());;
1515 stack_size = (size_t)(base - bottom);
1516
1517 assert(stack_size > 0, "Stack size calculation problem");
1518
1519 if (stack_size > jt->stack_size()) {
1520 NOT_PRODUCT(
1521 struct rlimit limits;
1522 getrlimit(RLIMIT_STACK, &limits);
1523 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1524 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1525 )
1526 tty->print_cr(
1527 "Stack size of %d Kb exceeds current limit of %d Kb.\n"
1528 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1529 "See limit(1) to increase the stack size limit.",
1530 stack_size / K, jt->stack_size() / K);
1531 vm_exit(1);
1532 }
1533 assert(jt->stack_size() >= stack_size,
1534 "Attempt to map more stack than was allocated");
1535 jt->set_stack_size(stack_size);
1536 }
1537
1538 // 5/22/01: Right now alternate signal stacks do not handle
1539 // throwing stack overflow exceptions, see bug 4463178
1540 // Until a fix is found for this, T2 will NOT imply alternate signal
1541 // stacks.
1542 // If using T2 libthread threads, install an alternate signal stack.
1543 // Because alternate stacks associate with LWPs on Solaris,
1544 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads
1545 // we prefer to explicitly stack bang.
1546 // If not using T2 libthread, but using UseBoundThreads any threads
1547 // (primordial thread, jni_attachCurrentThread) we do not create,
1548 // probably are not bound, therefore they can not have an alternate
1549 // signal stack. Since our stack banging code is generated and
1550 // is shared across threads, all threads must be bound to allow
1551 // using alternate signal stacks. The alternative is to interpose
1552 // on _lwp_create to associate an alt sig stack with each LWP,
1553 // and this could be a problem when the JVM is embedded.
1554 // We would prefer to use alternate signal stacks with T2
1555 // Since there is currently no accurate way to detect T2
1556 // we do not. Assuming T2 when running T1 causes sig 11s or assertions
1557 // on installing alternate signal stacks
1558
1559
1560 // 05/09/03: removed alternate signal stack support for Solaris
1561 // The alternate signal stack mechanism is no longer needed to
1562 // handle stack overflow. This is now handled by allocating
1563 // guard pages (red zone) and stackbanging.
1564 // Initially the alternate signal stack mechanism was removed because
1565 // it did not work with T1 llibthread. Alternate
1566 // signal stacks MUST have all threads bound to lwps. Applications
1567 // can create their own threads and attach them without their being
1568 // bound under T1. This is frequently the case for the primordial thread.
1569 // If we were ever to reenable this mechanism we would need to
1570 // use the dynamic check for T2 libthread.
1571
1572 os::Solaris::init_thread_fpu_state();
1573 std::set_terminate(_handle_uncaught_cxx_exception);
1574 }
1575
1576
1577
1578 // Free Solaris resources related to the OSThread
1579 void os::free_thread(OSThread* osthread) {
1580 assert(osthread != NULL, "os::free_thread but osthread not set");
1581
1582
1583 // We are told to free resources of the argument thread,
1584 // but we can only really operate on the current thread.
1585 // The main thread must take the VMThread down synchronously
1586 // before the main thread exits and frees up CodeHeap
1587 guarantee((Thread::current()->osthread() == osthread
1588 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread");
1589 if (Thread::current()->osthread() == osthread) {
1590 // Restore caller's signal mask
1591 sigset_t sigmask = osthread->caller_sigmask();
1592 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL);
1593 }
1594 delete osthread;
1595 }
1596
1597 void os::pd_start_thread(Thread* thread) {
1598 int status = thr_continue(thread->osthread()->thread_id());
1599 assert_status(status == 0, status, "thr_continue failed");
1600 }
1601
1602
1603 intx os::current_thread_id() {
1604 return (intx)thr_self();
1605 }
1606
1607 static pid_t _initial_pid = 0;
1608
1609 int os::current_process_id() {
1610 return (int)(_initial_pid ? _initial_pid : getpid());
1611 }
1612
1613 int os::allocate_thread_local_storage() {
1614 // %%% in Win32 this allocates a memory segment pointed to by a
1615 // register. Dan Stein can implement a similar feature in
1616 // Solaris. Alternatively, the VM can do the same thing
1617 // explicitly: malloc some storage and keep the pointer in a
1618 // register (which is part of the thread's context) (or keep it
1619 // in TLS).
1620 // %%% In current versions of Solaris, thr_self and TSD can
1621 // be accessed via short sequences of displaced indirections.
1622 // The value of thr_self is available as %g7(36).
1623 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4),
1624 // assuming that the current thread already has a value bound to k.
1625 // It may be worth experimenting with such access patterns,
1626 // and later having the parameters formally exported from a Solaris
1627 // interface. I think, however, that it will be faster to
1628 // maintain the invariant that %g2 always contains the
1629 // JavaThread in Java code, and have stubs simply
1630 // treat %g2 as a caller-save register, preserving it in a %lN.
1631 thread_key_t tk;
1632 if (thr_keycreate( &tk, NULL ) )
1633 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed "
1634 "(%s)", strerror(errno)));
1635 return int(tk);
1636 }
1637
1638 void os::free_thread_local_storage(int index) {
1639 // %%% don't think we need anything here
1640 // if ( pthread_key_delete((pthread_key_t) tk) )
1641 // fatal("os::free_thread_local_storage: pthread_key_delete failed");
1642 }
1643
1644 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific
1645 // small number - point is NO swap space available
1646 void os::thread_local_storage_at_put(int index, void* value) {
1647 // %%% this is used only in threadLocalStorage.cpp
1648 if (thr_setspecific((thread_key_t)index, value)) {
1649 if (errno == ENOMEM) {
1650 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space");
1651 } else {
1652 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed "
1653 "(%s)", strerror(errno)));
1654 }
1655 } else {
1656 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ;
1657 }
1658 }
1659
1660 // This function could be called before TLS is initialized, for example, when
1661 // VM receives an async signal or when VM causes a fatal error during
1662 // initialization. Return NULL if thr_getspecific() fails.
1663 void* os::thread_local_storage_at(int index) {
1664 // %%% this is used only in threadLocalStorage.cpp
1665 void* r = NULL;
1666 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r;
1667 }
1668
1669
1670 // gethrtime can move backwards if read from one cpu and then a different cpu
1671 // getTimeNanos is guaranteed to not move backward on Solaris
1672 // local spinloop created as faster for a CAS on an int than
1673 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not
1674 // supported on sparc v8 or pre supports_cx8 intel boxes.
1675 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong
1676 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes
1677 inline hrtime_t oldgetTimeNanos() {
1678 int gotlock = LOCK_INVALID;
1679 hrtime_t newtime = gethrtime();
1680
1681 for (;;) {
1682 // grab lock for max_hrtime
1683 int curlock = max_hrtime_lock;
1684 if (curlock & LOCK_BUSY) continue;
1685 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue;
1686 if (newtime > max_hrtime) {
1687 max_hrtime = newtime;
1688 } else {
1689 newtime = max_hrtime;
1690 }
1691 // release lock
1692 max_hrtime_lock = LOCK_FREE;
1693 return newtime;
1694 }
1695 }
1696 // gethrtime can move backwards if read from one cpu and then a different cpu
1697 // getTimeNanos is guaranteed to not move backward on Solaris
1698 inline hrtime_t getTimeNanos() {
1699 if (VM_Version::supports_cx8()) {
1700 const hrtime_t now = gethrtime();
1701 // Use atomic long load since 32-bit x86 uses 2 registers to keep long.
1702 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime);
1703 if (now <= prev) return prev; // same or retrograde time;
1704 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev);
1705 assert(obsv >= prev, "invariant"); // Monotonicity
1706 // If the CAS succeeded then we're done and return "now".
1707 // If the CAS failed and the observed value "obs" is >= now then
1708 // we should return "obs". If the CAS failed and now > obs > prv then
1709 // some other thread raced this thread and installed a new value, in which case
1710 // we could either (a) retry the entire operation, (b) retry trying to install now
1711 // or (c) just return obs. We use (c). No loop is required although in some cases
1712 // we might discard a higher "now" value in deference to a slightly lower but freshly
1713 // installed obs value. That's entirely benign -- it admits no new orderings compared
1714 // to (a) or (b) -- and greatly reduces coherence traffic.
1715 // We might also condition (c) on the magnitude of the delta between obs and now.
1716 // Avoiding excessive CAS operations to hot RW locations is critical.
1717 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate
1718 return (prev == obsv) ? now : obsv ;
1719 } else {
1720 return oldgetTimeNanos();
1721 }
1722 }
1723
1724 // Time since start-up in seconds to a fine granularity.
1725 // Used by VMSelfDestructTimer and the MemProfiler.
1726 double os::elapsedTime() {
1727 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1728 }
1729
1730 jlong os::elapsed_counter() {
1731 return (jlong)(getTimeNanos() - first_hrtime);
1732 }
1733
1734 jlong os::elapsed_frequency() {
1735 return hrtime_hz;
1736 }
1737
1738 // Return the real, user, and system times in seconds from an
1739 // arbitrary fixed point in the past.
1740 bool os::getTimesSecs(double* process_real_time,
1741 double* process_user_time,
1742 double* process_system_time) {
1743 struct tms ticks;
1744 clock_t real_ticks = times(&ticks);
1745
1746 if (real_ticks == (clock_t) (-1)) {
1747 return false;
1748 } else {
1749 double ticks_per_second = (double) clock_tics_per_sec;
1750 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1751 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1752 // For consistency return the real time from getTimeNanos()
1753 // converted to seconds.
1754 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1755
1756 return true;
1757 }
1758 }
1759
1760 bool os::supports_vtime() { return true; }
1761
1762 bool os::enable_vtime() {
1763 int fd = ::open("/proc/self/ctl", O_WRONLY);
1764 if (fd == -1)
1765 return false;
1766
1767 long cmd[] = { PCSET, PR_MSACCT };
1768 int res = ::write(fd, cmd, sizeof(long) * 2);
1769 ::close(fd);
1770 if (res != sizeof(long) * 2)
1771 return false;
1772
1773 return true;
1774 }
1775
1776 bool os::vtime_enabled() {
1777 int fd = ::open("/proc/self/status", O_RDONLY);
1778 if (fd == -1)
1779 return false;
1780
1781 pstatus_t status;
1782 int res = os::read(fd, (void*) &status, sizeof(pstatus_t));
1783 ::close(fd);
1784 if (res != sizeof(pstatus_t))
1785 return false;
1786
1787 return status.pr_flags & PR_MSACCT;
1788 }
1789
1790 double os::elapsedVTime() {
1791 return (double)gethrvtime() / (double)hrtime_hz;
1792 }
1793
1794 // Used internally for comparisons only
1795 // getTimeMillis guaranteed to not move backwards on Solaris
1796 jlong getTimeMillis() {
1797 jlong nanotime = getTimeNanos();
1798 return (jlong)(nanotime / NANOSECS_PER_MILLISEC);
1799 }
1800
1801 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1802 jlong os::javaTimeMillis() {
1803 timeval t;
1804 if (gettimeofday( &t, NULL) == -1)
1805 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)));
1806 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1807 }
1808
1809 jlong os::javaTimeNanos() {
1810 return (jlong)getTimeNanos();
1811 }
1812
1813 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1814 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1815 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1816 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1817 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1818 }
1819
1820 char * os::local_time_string(char *buf, size_t buflen) {
1821 struct tm t;
1822 time_t long_time;
1823 time(&long_time);
1824 localtime_r(&long_time, &t);
1825 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1826 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1827 t.tm_hour, t.tm_min, t.tm_sec);
1828 return buf;
1829 }
1830
1831 // Note: os::shutdown() might be called very early during initialization, or
1832 // called from signal handler. Before adding something to os::shutdown(), make
1833 // sure it is async-safe and can handle partially initialized VM.
1834 void os::shutdown() {
1835
1836 // allow PerfMemory to attempt cleanup of any persistent resources
1837 perfMemory_exit();
1838
1839 // needs to remove object in file system
1840 AttachListener::abort();
1841
1842 // flush buffered output, finish log files
1843 ostream_abort();
1844
1845 // Check for abort hook
1846 abort_hook_t abort_hook = Arguments::abort_hook();
1847 if (abort_hook != NULL) {
1848 abort_hook();
1849 }
1850 }
1851
1852 // Note: os::abort() might be called very early during initialization, or
1853 // called from signal handler. Before adding something to os::abort(), make
1854 // sure it is async-safe and can handle partially initialized VM.
1855 void os::abort(bool dump_core) {
1856 os::shutdown();
1857 if (dump_core) {
1858 #ifndef PRODUCT
1859 fdStream out(defaultStream::output_fd());
1860 out.print_raw("Current thread is ");
1861 char buf[16];
1862 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1863 out.print_raw_cr(buf);
1864 out.print_raw_cr("Dumping core ...");
1865 #endif
1866 ::abort(); // dump core (for debugging)
1867 }
1868
1869 ::exit(1);
1870 }
1871
1872 // Die immediately, no exit hook, no abort hook, no cleanup.
1873 void os::die() {
1874 _exit(-1);
1875 }
1876
1877 // unused
1878 void os::set_error_file(const char *logfile) {}
1879
1880 // DLL functions
1881
1882 const char* os::dll_file_extension() { return ".so"; }
1883
1884 // This must be hard coded because it's the system's temporary
1885 // directory not the java application's temp directory, ala java.io.tmpdir.
1886 const char* os::get_temp_directory() { return "/tmp"; }
1887
1888 static bool file_exists(const char* filename) {
1889 struct stat statbuf;
1890 if (filename == NULL || strlen(filename) == 0) {
1891 return false;
1892 }
1893 return os::stat(filename, &statbuf) == 0;
1894 }
1895
1896 void os::dll_build_name(char* buffer, size_t buflen,
1897 const char* pname, const char* fname) {
1898 const size_t pnamelen = pname ? strlen(pname) : 0;
1899
1900 // Quietly truncate on buffer overflow. Should be an error.
1901 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
1902 *buffer = '\0';
1903 return;
1904 }
1905
1906 if (pnamelen == 0) {
1907 snprintf(buffer, buflen, "lib%s.so", fname);
1908 } else if (strchr(pname, *os::path_separator()) != NULL) {
1909 int n;
1910 char** pelements = split_path(pname, &n);
1911 for (int i = 0 ; i < n ; i++) {
1912 // really shouldn't be NULL but what the heck, check can't hurt
1913 if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
1914 continue; // skip the empty path values
1915 }
1916 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
1917 if (file_exists(buffer)) {
1918 break;
1919 }
1920 }
1921 // release the storage
1922 for (int i = 0 ; i < n ; i++) {
1923 if (pelements[i] != NULL) {
1924 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
1925 }
1926 }
1927 if (pelements != NULL) {
1928 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
1929 }
1930 } else {
1931 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
1932 }
1933 }
1934
1935 const char* os::get_current_directory(char *buf, int buflen) {
1936 return getcwd(buf, buflen);
1937 }
1938
1939 // check if addr is inside libjvm[_g].so
1940 bool os::address_is_in_vm(address addr) {
1941 static address libjvm_base_addr;
1942 Dl_info dlinfo;
1943
1944 if (libjvm_base_addr == NULL) {
1945 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo);
1946 libjvm_base_addr = (address)dlinfo.dli_fbase;
1947 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1948 }
1949
1950 if (dladdr((void *)addr, &dlinfo)) {
1951 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1952 }
1953
1954 return false;
1955 }
1956
1957 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int);
1958 static dladdr1_func_type dladdr1_func = NULL;
1959
1960 bool os::dll_address_to_function_name(address addr, char *buf,
1961 int buflen, int * offset) {
1962 Dl_info dlinfo;
1963
1964 // dladdr1_func was initialized in os::init()
1965 if (dladdr1_func){
1966 // yes, we have dladdr1
1967
1968 // Support for dladdr1 is checked at runtime; it may be
1969 // available even if the vm is built on a machine that does
1970 // not have dladdr1 support. Make sure there is a value for
1971 // RTLD_DL_SYMENT.
1972 #ifndef RTLD_DL_SYMENT
1973 #define RTLD_DL_SYMENT 1
1974 #endif
1975 #ifdef _LP64
1976 Elf64_Sym * info;
1977 #else
1978 Elf32_Sym * info;
1979 #endif
1980 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1981 RTLD_DL_SYMENT)) {
1982 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1983 if (buf != NULL) {
1984 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
1985 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1986 }
1987 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1988 return true;
1989 }
1990 }
1991 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
1992 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1993 buf, buflen, offset, dlinfo.dli_fname)) {
1994 return true;
1995 }
1996 }
1997 if (buf != NULL) buf[0] = '\0';
1998 if (offset != NULL) *offset = -1;
1999 return false;
2000 } else {
2001 // no, only dladdr is available
2002 if (dladdr((void *)addr, &dlinfo)) {
2003 if (buf != NULL) {
2004 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen))
2005 jio_snprintf(buf, buflen, dlinfo.dli_sname);
2006 }
2007 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
2008 return true;
2009 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) {
2010 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
2011 buf, buflen, offset, dlinfo.dli_fname)) {
2012 return true;
2013 }
2014 }
2015 if (buf != NULL) buf[0] = '\0';
2016 if (offset != NULL) *offset = -1;
2017 return false;
2018 }
2019 }
2020
2021 bool os::dll_address_to_library_name(address addr, char* buf,
2022 int buflen, int* offset) {
2023 Dl_info dlinfo;
2024
2025 if (dladdr((void*)addr, &dlinfo)){
2026 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
2027 if (offset) *offset = addr - (address)dlinfo.dli_fbase;
2028 return true;
2029 } else {
2030 if (buf) buf[0] = '\0';
2031 if (offset) *offset = -1;
2032 return false;
2033 }
2034 }
2035
2036 // Prints the names and full paths of all opened dynamic libraries
2037 // for current process
2038 void os::print_dll_info(outputStream * st) {
2039 Dl_info dli;
2040 void *handle;
2041 Link_map *map;
2042 Link_map *p;
2043
2044 st->print_cr("Dynamic libraries:"); st->flush();
2045
2046 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) {
2047 st->print_cr("Error: Cannot print dynamic libraries.");
2048 return;
2049 }
2050 handle = dlopen(dli.dli_fname, RTLD_LAZY);
2051 if (handle == NULL) {
2052 st->print_cr("Error: Cannot print dynamic libraries.");
2053 return;
2054 }
2055 dlinfo(handle, RTLD_DI_LINKMAP, &map);
2056 if (map == NULL) {
2057 st->print_cr("Error: Cannot print dynamic libraries.");
2058 return;
2059 }
2060
2061 while (map->l_prev != NULL)
2062 map = map->l_prev;
2063
2064 while (map != NULL) {
2065 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name);
2066 map = map->l_next;
2067 }
2068
2069 dlclose(handle);
2070 }
2071
2072 // Loads .dll/.so and
2073 // in case of error it checks if .dll/.so was built for the
2074 // same architecture as Hotspot is running on
2075
2076 void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
2077 {
2078 void * result= ::dlopen(filename, RTLD_LAZY);
2079 if (result != NULL) {
2080 // Successful loading
2081 return result;
2082 }
2083
2084 Elf32_Ehdr elf_head;
2085
2086 // Read system error message into ebuf
2087 // It may or may not be overwritten below
2088 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
2089 ebuf[ebuflen-1]='\0';
2090 int diag_msg_max_length=ebuflen-strlen(ebuf);
2091 char* diag_msg_buf=ebuf+strlen(ebuf);
2092
2093 if (diag_msg_max_length==0) {
2094 // No more space in ebuf for additional diagnostics message
2095 return NULL;
2096 }
2097
2098
2099 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
2100
2101 if (file_descriptor < 0) {
2102 // Can't open library, report dlerror() message
2103 return NULL;
2104 }
2105
2106 bool failed_to_read_elf_head=
2107 (sizeof(elf_head)!=
2108 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
2109
2110 ::close(file_descriptor);
2111 if (failed_to_read_elf_head) {
2112 // file i/o error - report dlerror() msg
2113 return NULL;
2114 }
2115
2116 typedef struct {
2117 Elf32_Half code; // Actual value as defined in elf.h
2118 Elf32_Half compat_class; // Compatibility of archs at VM's sense
2119 char elf_class; // 32 or 64 bit
2120 char endianess; // MSB or LSB
2121 char* name; // String representation
2122 } arch_t;
2123
2124 static const arch_t arch_array[]={
2125 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2126 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
2127 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
2128 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
2129 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2130 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
2131 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
2132 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
2133 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
2134 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
2135 };
2136
2137 #if (defined IA32)
2138 static Elf32_Half running_arch_code=EM_386;
2139 #elif (defined AMD64)
2140 static Elf32_Half running_arch_code=EM_X86_64;
2141 #elif (defined IA64)
2142 static Elf32_Half running_arch_code=EM_IA_64;
2143 #elif (defined __sparc) && (defined _LP64)
2144 static Elf32_Half running_arch_code=EM_SPARCV9;
2145 #elif (defined __sparc) && (!defined _LP64)
2146 static Elf32_Half running_arch_code=EM_SPARC;
2147 #elif (defined __powerpc64__)
2148 static Elf32_Half running_arch_code=EM_PPC64;
2149 #elif (defined __powerpc__)
2150 static Elf32_Half running_arch_code=EM_PPC;
2151 #elif (defined ARM)
2152 static Elf32_Half running_arch_code=EM_ARM;
2153 #else
2154 #error Method os::dll_load requires that one of following is defined:\
2155 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
2156 #endif
2157
2158 // Identify compatability class for VM's architecture and library's architecture
2159 // Obtain string descriptions for architectures
2160
2161 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
2162 int running_arch_index=-1;
2163
2164 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
2165 if (running_arch_code == arch_array[i].code) {
2166 running_arch_index = i;
2167 }
2168 if (lib_arch.code == arch_array[i].code) {
2169 lib_arch.compat_class = arch_array[i].compat_class;
2170 lib_arch.name = arch_array[i].name;
2171 }
2172 }
2173
2174 assert(running_arch_index != -1,
2175 "Didn't find running architecture code (running_arch_code) in arch_array");
2176 if (running_arch_index == -1) {
2177 // Even though running architecture detection failed
2178 // we may still continue with reporting dlerror() message
2179 return NULL;
2180 }
2181
2182 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
2183 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
2184 return NULL;
2185 }
2186
2187 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
2188 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
2189 return NULL;
2190 }
2191
2192 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
2193 if ( lib_arch.name!=NULL ) {
2194 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2195 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
2196 lib_arch.name, arch_array[running_arch_index].name);
2197 } else {
2198 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
2199 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
2200 lib_arch.code,
2201 arch_array[running_arch_index].name);
2202 }
2203 }
2204
2205 return NULL;
2206 }
2207
2208 void* os::dll_lookup(void* handle, const char* name) {
2209 return dlsym(handle, name);
2210 }
2211
2212 int os::stat(const char *path, struct stat *sbuf) {
2213 char pathbuf[MAX_PATH];
2214 if (strlen(path) > MAX_PATH - 1) {
2215 errno = ENAMETOOLONG;
2216 return -1;
2217 }
2218 os::native_path(strcpy(pathbuf, path));
2219 return ::stat(pathbuf, sbuf);
2220 }
2221
2222 static bool _print_ascii_file(const char* filename, outputStream* st) {
2223 int fd = ::open(filename, O_RDONLY);
2224 if (fd == -1) {
2225 return false;
2226 }
2227
2228 char buf[32];
2229 int bytes;
2230 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
2231 st->print_raw(buf, bytes);
2232 }
2233
2234 ::close(fd);
2235
2236 return true;
2237 }
2238
2239 void os::print_os_info_brief(outputStream* st) {
2240 os::Solaris::print_distro_info(st);
2241
2242 os::Posix::print_uname_info(st);
2243
2244 os::Solaris::print_libversion_info(st);
2245 }
2246
2247 void os::print_os_info(outputStream* st) {
2248 st->print("OS:");
2249
2250 os::Solaris::print_distro_info(st);
2251
2252 os::Posix::print_uname_info(st);
2253
2254 os::Solaris::print_libversion_info(st);
2255
2256 os::Posix::print_rlimit_info(st);
2257
2258 os::Posix::print_load_average(st);
2259 }
2260
2261 void os::Solaris::print_distro_info(outputStream* st) {
2262 if (!_print_ascii_file("/etc/release", st)) {
2263 st->print("Solaris");
2264 }
2265 st->cr();
2266 }
2267
2268 void os::Solaris::print_libversion_info(outputStream* st) {
2269 if (os::Solaris::T2_libthread()) {
2270 st->print(" (T2 libthread)");
2271 }
2272 else {
2273 st->print(" (T1 libthread)");
2274 }
2275 st->cr();
2276 }
2277
2278 static bool check_addr0(outputStream* st) {
2279 jboolean status = false;
2280 int fd = ::open("/proc/self/map",O_RDONLY);
2281 if (fd >= 0) {
2282 prmap_t p;
2283 while(::read(fd, &p, sizeof(p)) > 0) {
2284 if (p.pr_vaddr == 0x0) {
2285 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname);
2286 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname);
2287 st->print("Access:");
2288 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-");
2289 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-");
2290 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-");
2291 st->cr();
2292 status = true;
2293 }
2294 ::close(fd);
2295 }
2296 }
2297 return status;
2298 }
2299
2300 void os::pd_print_cpu_info(outputStream* st) {
2301 // Nothing to do for now.
2302 }
2303
2304 void os::print_memory_info(outputStream* st) {
2305 st->print("Memory:");
2306 st->print(" %dk page", os::vm_page_size()>>10);
2307 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
2308 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
2309 st->cr();
2310 (void) check_addr0(st);
2311 }
2312
2313 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific
2314 // but they're the same for all the solaris architectures that we support.
2315 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR",
2316 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG",
2317 "ILL_COPROC", "ILL_BADSTK" };
2318
2319 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV",
2320 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES",
2321 "FPE_FLTINV", "FPE_FLTSUB" };
2322
2323 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" };
2324
2325 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" };
2326
2327 void os::print_siginfo(outputStream* st, void* siginfo) {
2328 st->print("siginfo:");
2329
2330 const int buflen = 100;
2331 char buf[buflen];
2332 siginfo_t *si = (siginfo_t*)siginfo;
2333 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen));
2334 char *err = strerror(si->si_errno);
2335 if (si->si_errno != 0 && err != NULL) {
2336 st->print("si_errno=%s", err);
2337 } else {
2338 st->print("si_errno=%d", si->si_errno);
2339 }
2340 const int c = si->si_code;
2341 assert(c > 0, "unexpected si_code");
2342 switch (si->si_signo) {
2343 case SIGILL:
2344 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]);
2345 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2346 break;
2347 case SIGFPE:
2348 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]);
2349 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2350 break;
2351 case SIGSEGV:
2352 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]);
2353 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2354 break;
2355 case SIGBUS:
2356 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]);
2357 st->print(", si_addr=" PTR_FORMAT, si->si_addr);
2358 break;
2359 default:
2360 st->print(", si_code=%d", si->si_code);
2361 // no si_addr
2362 }
2363
2364 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
2365 UseSharedSpaces) {
2366 FileMapInfo* mapinfo = FileMapInfo::current_info();
2367 if (mapinfo->is_in_shared_space(si->si_addr)) {
2368 st->print("\n\nError accessing class data sharing archive." \
2369 " Mapped file inaccessible during execution, " \
2370 " possible disk/network problem.");
2371 }
2372 }
2373 st->cr();
2374 }
2375
2376 // Moved from whole group, because we need them here for diagnostic
2377 // prints.
2378 #define OLDMAXSIGNUM 32
2379 static int Maxsignum = 0;
2380 static int *ourSigFlags = NULL;
2381
2382 extern "C" void sigINTRHandler(int, siginfo_t*, void*);
2383
2384 int os::Solaris::get_our_sigflags(int sig) {
2385 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2386 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2387 return ourSigFlags[sig];
2388 }
2389
2390 void os::Solaris::set_our_sigflags(int sig, int flags) {
2391 assert(ourSigFlags!=NULL, "signal data structure not initialized");
2392 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
2393 ourSigFlags[sig] = flags;
2394 }
2395
2396
2397 static const char* get_signal_handler_name(address handler,
2398 char* buf, int buflen) {
2399 int offset;
2400 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
2401 if (found) {
2402 // skip directory names
2403 const char *p1, *p2;
2404 p1 = buf;
2405 size_t len = strlen(os::file_separator());
2406 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
2407 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
2408 } else {
2409 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
2410 }
2411 return buf;
2412 }
2413
2414 static void print_signal_handler(outputStream* st, int sig,
2415 char* buf, size_t buflen) {
2416 struct sigaction sa;
2417
2418 sigaction(sig, NULL, &sa);
2419
2420 st->print("%s: ", os::exception_name(sig, buf, buflen));
2421
2422 address handler = (sa.sa_flags & SA_SIGINFO)
2423 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
2424 : CAST_FROM_FN_PTR(address, sa.sa_handler);
2425
2426 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
2427 st->print("SIG_DFL");
2428 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
2429 st->print("SIG_IGN");
2430 } else {
2431 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
2432 }
2433
2434 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask);
2435
2436 address rh = VMError::get_resetted_sighandler(sig);
2437 // May be, handler was resetted by VMError?
2438 if(rh != NULL) {
2439 handler = rh;
2440 sa.sa_flags = VMError::get_resetted_sigflags(sig);
2441 }
2442
2443 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags);
2444
2445 // Check: is it our handler?
2446 if(handler == CAST_FROM_FN_PTR(address, signalHandler) ||
2447 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) {
2448 // It is our signal handler
2449 // check for flags
2450 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
2451 st->print(
2452 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
2453 os::Solaris::get_our_sigflags(sig));
2454 }
2455 }
2456 st->cr();
2457 }
2458
2459 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
2460 st->print_cr("Signal Handlers:");
2461 print_signal_handler(st, SIGSEGV, buf, buflen);
2462 print_signal_handler(st, SIGBUS , buf, buflen);
2463 print_signal_handler(st, SIGFPE , buf, buflen);
2464 print_signal_handler(st, SIGPIPE, buf, buflen);
2465 print_signal_handler(st, SIGXFSZ, buf, buflen);
2466 print_signal_handler(st, SIGILL , buf, buflen);
2467 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
2468 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
2469 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
2470 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
2471 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
2472 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
2473 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen);
2474 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen);
2475 }
2476
2477 static char saved_jvm_path[MAXPATHLEN] = { 0 };
2478
2479 // Find the full path to the current module, libjvm.so or libjvm_g.so
2480 void os::jvm_path(char *buf, jint buflen) {
2481 // Error checking.
2482 if (buflen < MAXPATHLEN) {
2483 assert(false, "must use a large-enough buffer");
2484 buf[0] = '\0';
2485 return;
2486 }
2487 // Lazy resolve the path to current module.
2488 if (saved_jvm_path[0] != 0) {
2489 strcpy(buf, saved_jvm_path);
2490 return;
2491 }
2492
2493 Dl_info dlinfo;
2494 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
2495 assert(ret != 0, "cannot locate libjvm");
2496 realpath((char *)dlinfo.dli_fname, buf);
2497
2498 if (Arguments::created_by_gamma_launcher()) {
2499 // Support for the gamma launcher. Typical value for buf is
2500 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at
2501 // the right place in the string, then assume we are installed in a JDK and
2502 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix
2503 // up the path so it looks like libjvm.so is installed there (append a
2504 // fake suffix hotspot/libjvm.so).
2505 const char *p = buf + strlen(buf) - 1;
2506 for (int count = 0; p > buf && count < 5; ++count) {
2507 for (--p; p > buf && *p != '/'; --p)
2508 /* empty */ ;
2509 }
2510
2511 if (strncmp(p, "/jre/lib/", 9) != 0) {
2512 // Look for JAVA_HOME in the environment.
2513 char* java_home_var = ::getenv("JAVA_HOME");
2514 if (java_home_var != NULL && java_home_var[0] != 0) {
2515 char cpu_arch[12];
2516 char* jrelib_p;
2517 int len;
2518 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch));
2519 #ifdef _LP64
2520 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9.
2521 if (strcmp(cpu_arch, "sparc") == 0) {
2522 strcat(cpu_arch, "v9");
2523 } else if (strcmp(cpu_arch, "i386") == 0) {
2524 strcpy(cpu_arch, "amd64");
2525 }
2526 #endif
2527 // Check the current module name "libjvm.so" or "libjvm_g.so".
2528 p = strrchr(buf, '/');
2529 assert(strstr(p, "/libjvm") == p, "invalid library name");
2530 p = strstr(p, "_g") ? "_g" : "";
2531
2532 realpath(java_home_var, buf);
2533 // determine if this is a legacy image or modules image
2534 // modules image doesn't have "jre" subdirectory
2535 len = strlen(buf);
2536 jrelib_p = buf + len;
2537 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
2538 if (0 != access(buf, F_OK)) {
2539 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
2540 }
2541
2542 if (0 == access(buf, F_OK)) {
2543 // Use current module name "libjvm[_g].so" instead of
2544 // "libjvm"debug_only("_g")".so" since for fastdebug version
2545 // we should have "libjvm.so" but debug_only("_g") adds "_g"!
2546 len = strlen(buf);
2547 snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p);
2548 } else {
2549 // Go back to path of .so
2550 realpath((char *)dlinfo.dli_fname, buf);
2551 }
2552 }
2553 }
2554 }
2555
2556 strcpy(saved_jvm_path, buf);
2557 }
2558
2559
2560 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2561 // no prefix required, not even "_"
2562 }
2563
2564
2565 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2566 // no suffix required
2567 }
2568
2569 // This method is a copy of JDK's sysGetLastErrorString
2570 // from src/solaris/hpi/src/system_md.c
2571
2572 size_t os::lasterror(char *buf, size_t len) {
2573
2574 if (errno == 0) return 0;
2575
2576 const char *s = ::strerror(errno);
2577 size_t n = ::strlen(s);
2578 if (n >= len) {
2579 n = len - 1;
2580 }
2581 ::strncpy(buf, s, n);
2582 buf[n] = '\0';
2583 return n;
2584 }
2585
2586
2587 // sun.misc.Signal
2588
2589 extern "C" {
2590 static void UserHandler(int sig, void *siginfo, void *context) {
2591 // Ctrl-C is pressed during error reporting, likely because the error
2592 // handler fails to abort. Let VM die immediately.
2593 if (sig == SIGINT && is_error_reported()) {
2594 os::die();
2595 }
2596
2597 os::signal_notify(sig);
2598 // We do not need to reinstate the signal handler each time...
2599 }
2600 }
2601
2602 void* os::user_handler() {
2603 return CAST_FROM_FN_PTR(void*, UserHandler);
2604 }
2605
2606 extern "C" {
2607 typedef void (*sa_handler_t)(int);
2608 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2609 }
2610
2611 void* os::signal(int signal_number, void* handler) {
2612 struct sigaction sigAct, oldSigAct;
2613 sigfillset(&(sigAct.sa_mask));
2614 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2615 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2616
2617 if (sigaction(signal_number, &sigAct, &oldSigAct))
2618 // -1 means registration failed
2619 return (void *)-1;
2620
2621 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2622 }
2623
2624 void os::signal_raise(int signal_number) {
2625 raise(signal_number);
2626 }
2627
2628 /*
2629 * The following code is moved from os.cpp for making this
2630 * code platform specific, which it is by its very nature.
2631 */
2632
2633 // a counter for each possible signal value
2634 static int Sigexit = 0;
2635 static int Maxlibjsigsigs;
2636 static jint *pending_signals = NULL;
2637 static int *preinstalled_sigs = NULL;
2638 static struct sigaction *chainedsigactions = NULL;
2639 static sema_t sig_sem;
2640 typedef int (*version_getting_t)();
2641 version_getting_t os::Solaris::get_libjsig_version = NULL;
2642 static int libjsigversion = NULL;
2643
2644 int os::sigexitnum_pd() {
2645 assert(Sigexit > 0, "signal memory not yet initialized");
2646 return Sigexit;
2647 }
2648
2649 void os::Solaris::init_signal_mem() {
2650 // Initialize signal structures
2651 Maxsignum = SIGRTMAX;
2652 Sigexit = Maxsignum+1;
2653 assert(Maxsignum >0, "Unable to obtain max signal number");
2654
2655 Maxlibjsigsigs = Maxsignum;
2656
2657 // pending_signals has one int per signal
2658 // The additional signal is for SIGEXIT - exit signal to signal_thread
2659 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2660 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2661
2662 if (UseSignalChaining) {
2663 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2664 * (Maxsignum + 1), mtInternal);
2665 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2666 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2667 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2668 }
2669 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal);
2670 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2671 }
2672
2673 void os::signal_init_pd() {
2674 int ret;
2675
2676 ret = ::sema_init(&sig_sem, 0, NULL, NULL);
2677 assert(ret == 0, "sema_init() failed");
2678 }
2679
2680 void os::signal_notify(int signal_number) {
2681 int ret;
2682
2683 Atomic::inc(&pending_signals[signal_number]);
2684 ret = ::sema_post(&sig_sem);
2685 assert(ret == 0, "sema_post() failed");
2686 }
2687
2688 static int check_pending_signals(bool wait_for_signal) {
2689 int ret;
2690 while (true) {
2691 for (int i = 0; i < Sigexit + 1; i++) {
2692 jint n = pending_signals[i];
2693 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2694 return i;
2695 }
2696 }
2697 if (!wait_for_signal) {
2698 return -1;
2699 }
2700 JavaThread *thread = JavaThread::current();
2701 ThreadBlockInVM tbivm(thread);
2702
2703 bool threadIsSuspended;
2704 do {
2705 thread->set_suspend_equivalent();
2706 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2707 while((ret = ::sema_wait(&sig_sem)) == EINTR)
2708 ;
2709 assert(ret == 0, "sema_wait() failed");
2710
2711 // were we externally suspended while we were waiting?
2712 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2713 if (threadIsSuspended) {
2714 //
2715 // The semaphore has been incremented, but while we were waiting
2716 // another thread suspended us. We don't want to continue running
2717 // while suspended because that would surprise the thread that
2718 // suspended us.
2719 //
2720 ret = ::sema_post(&sig_sem);
2721 assert(ret == 0, "sema_post() failed");
2722
2723 thread->java_suspend_self();
2724 }
2725 } while (threadIsSuspended);
2726 }
2727 }
2728
2729 int os::signal_lookup() {
2730 return check_pending_signals(false);
2731 }
2732
2733 int os::signal_wait() {
2734 return check_pending_signals(true);
2735 }
2736
2737 ////////////////////////////////////////////////////////////////////////////////
2738 // Virtual Memory
2739
2740 static int page_size = -1;
2741
2742 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will
2743 // clear this var if support is not available.
2744 static bool has_map_align = true;
2745
2746 int os::vm_page_size() {
2747 assert(page_size != -1, "must call os::init");
2748 return page_size;
2749 }
2750
2751 // Solaris allocates memory by pages.
2752 int os::vm_allocation_granularity() {
2753 assert(page_size != -1, "must call os::init");
2754 return page_size;
2755 }
2756
2757 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2758 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2759 size_t size = bytes;
2760 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2761 if (res != NULL) {
2762 if (UseNUMAInterleaving) {
2763 numa_make_global(addr, bytes);
2764 }
2765 return true;
2766 }
2767 return false;
2768 }
2769
2770 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2771 bool exec) {
2772 if (commit_memory(addr, bytes, exec)) {
2773 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) {
2774 // If the large page size has been set and the VM
2775 // is using large pages, use the large page size
2776 // if it is smaller than the alignment hint. This is
2777 // a case where the VM wants to use a larger alignment size
2778 // for its own reasons but still want to use large pages
2779 // (which is what matters to setting the mpss range.
2780 size_t page_size = 0;
2781 if (large_page_size() < alignment_hint) {
2782 assert(UseLargePages, "Expected to be here for large page use only");
2783 page_size = large_page_size();
2784 } else {
2785 // If the alignment hint is less than the large page
2786 // size, the VM wants a particular alignment (thus the hint)
2787 // for internal reasons. Try to set the mpss range using
2788 // the alignment_hint.
2789 page_size = alignment_hint;
2790 }
2791 // Since this is a hint, ignore any failures.
2792 (void)Solaris::set_mpss_range(addr, bytes, page_size);
2793 }
2794 return true;
2795 }
2796 return false;
2797 }
2798
2799 // Uncommit the pages in a specified region.
2800 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2801 if (madvise(addr, bytes, MADV_FREE) < 0) {
2802 debug_only(warning("MADV_FREE failed."));
2803 return;
2804 }
2805 }
2806
2807 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2808 return os::commit_memory(addr, size);
2809 }
2810
2811 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2812 return os::uncommit_memory(addr, size);
2813 }
2814
2815 // Change the page size in a given range.
2816 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2817 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2818 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2819 if (UseLargePages && UseMPSS) {
2820 Solaris::set_mpss_range(addr, bytes, alignment_hint);
2821 }
2822 }
2823
2824 // Tell the OS to make the range local to the first-touching LWP
2825 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2826 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2827 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2828 debug_only(warning("MADV_ACCESS_LWP failed."));
2829 }
2830 }
2831
2832 // Tell the OS that this range would be accessed from different LWPs.
2833 void os::numa_make_global(char *addr, size_t bytes) {
2834 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2835 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2836 debug_only(warning("MADV_ACCESS_MANY failed."));
2837 }
2838 }
2839
2840 // Get the number of the locality groups.
2841 size_t os::numa_get_groups_num() {
2842 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2843 return n != -1 ? n : 1;
2844 }
2845
2846 // Get a list of leaf locality groups. A leaf lgroup is group that
2847 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2848 // board. An LWP is assigned to one of these groups upon creation.
2849 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2850 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2851 ids[0] = 0;
2852 return 1;
2853 }
2854 int result_size = 0, top = 1, bottom = 0, cur = 0;
2855 for (int k = 0; k < size; k++) {
2856 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2857 (Solaris::lgrp_id_t*)&ids[top], size - top);
2858 if (r == -1) {
2859 ids[0] = 0;
2860 return 1;
2861 }
2862 if (!r) {
2863 // That's a leaf node.
2864 assert (bottom <= cur, "Sanity check");
2865 // Check if the node has memory
2866 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2867 NULL, 0, LGRP_RSRC_MEM) > 0) {
2868 ids[bottom++] = ids[cur];
2869 }
2870 }
2871 top += r;
2872 cur++;
2873 }
2874 if (bottom == 0) {
2875 // Handle a situation, when the OS reports no memory available.
2876 // Assume UMA architecture.
2877 ids[0] = 0;
2878 return 1;
2879 }
2880 return bottom;
2881 }
2882
2883 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2884 bool os::numa_topology_changed() {
2885 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2886 if (is_stale != -1 && is_stale) {
2887 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2888 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2889 assert(c != 0, "Failure to initialize LGRP API");
2890 Solaris::set_lgrp_cookie(c);
2891 return true;
2892 }
2893 return false;
2894 }
2895
2896 // Get the group id of the current LWP.
2897 int os::numa_get_group_id() {
2898 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2899 if (lgrp_id == -1) {
2900 return 0;
2901 }
2902 const int size = os::numa_get_groups_num();
2903 int *ids = (int*)alloca(size * sizeof(int));
2904
2905 // Get the ids of all lgroups with memory; r is the count.
2906 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2907 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2908 if (r <= 0) {
2909 return 0;
2910 }
2911 return ids[os::random() % r];
2912 }
2913
2914 // Request information about the page.
2915 bool os::get_page_info(char *start, page_info* info) {
2916 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2917 uint64_t addr = (uintptr_t)start;
2918 uint64_t outdata[2];
2919 uint_t validity = 0;
2920
2921 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2922 return false;
2923 }
2924
2925 info->size = 0;
2926 info->lgrp_id = -1;
2927
2928 if ((validity & 1) != 0) {
2929 if ((validity & 2) != 0) {
2930 info->lgrp_id = outdata[0];
2931 }
2932 if ((validity & 4) != 0) {
2933 info->size = outdata[1];
2934 }
2935 return true;
2936 }
2937 return false;
2938 }
2939
2940 // Scan the pages from start to end until a page different than
2941 // the one described in the info parameter is encountered.
2942 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
2943 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2944 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2945 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT];
2946 uint_t validity[MAX_MEMINFO_CNT];
2947
2948 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2949 uint64_t p = (uint64_t)start;
2950 while (p < (uint64_t)end) {
2951 addrs[0] = p;
2952 size_t addrs_count = 1;
2953 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) {
2954 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2955 addrs_count++;
2956 }
2957
2958 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2959 return NULL;
2960 }
2961
2962 size_t i = 0;
2963 for (; i < addrs_count; i++) {
2964 if ((validity[i] & 1) != 0) {
2965 if ((validity[i] & 4) != 0) {
2966 if (outdata[types * i + 1] != page_expected->size) {
2967 break;
2968 }
2969 } else
2970 if (page_expected->size != 0) {
2971 break;
2972 }
2973
2974 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2975 if (outdata[types * i] != page_expected->lgrp_id) {
2976 break;
2977 }
2978 }
2979 } else {
2980 return NULL;
2981 }
2982 }
2983
2984 if (i != addrs_count) {
2985 if ((validity[i] & 2) != 0) {
2986 page_found->lgrp_id = outdata[types * i];
2987 } else {
2988 page_found->lgrp_id = -1;
2989 }
2990 if ((validity[i] & 4) != 0) {
2991 page_found->size = outdata[types * i + 1];
2992 } else {
2993 page_found->size = 0;
2994 }
2995 return (char*)addrs[i];
2996 }
2997
2998 p = addrs[addrs_count - 1] + page_size;
2999 }
3000 return end;
3001 }
3002
3003 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
3004 size_t size = bytes;
3005 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3006 // uncommitted page. Otherwise, the read/write might succeed if we
3007 // have enough swap space to back the physical page.
3008 return
3009 NULL != Solaris::mmap_chunk(addr, size,
3010 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
3011 PROT_NONE);
3012 }
3013
3014 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
3015 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
3016
3017 if (b == MAP_FAILED) {
3018 return NULL;
3019 }
3020 return b;
3021 }
3022
3023 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) {
3024 char* addr = requested_addr;
3025 int flags = MAP_PRIVATE | MAP_NORESERVE;
3026
3027 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap");
3028
3029 if (fixed) {
3030 flags |= MAP_FIXED;
3031 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) {
3032 flags |= MAP_ALIGN;
3033 addr = (char*) alignment_hint;
3034 }
3035
3036 // Map uncommitted pages PROT_NONE so we fail early if we touch an
3037 // uncommitted page. Otherwise, the read/write might succeed if we
3038 // have enough swap space to back the physical page.
3039 return mmap_chunk(addr, bytes, flags, PROT_NONE);
3040 }
3041
3042 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) {
3043 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL));
3044
3045 guarantee(requested_addr == NULL || requested_addr == addr,
3046 "OS failed to return requested mmap address.");
3047 return addr;
3048 }
3049
3050 // Reserve memory at an arbitrary address, only if that area is
3051 // available (and not reserved for something else).
3052
3053 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
3054 const int max_tries = 10;
3055 char* base[max_tries];
3056 size_t size[max_tries];
3057
3058 // Solaris adds a gap between mmap'ed regions. The size of the gap
3059 // is dependent on the requested size and the MMU. Our initial gap
3060 // value here is just a guess and will be corrected later.
3061 bool had_top_overlap = false;
3062 bool have_adjusted_gap = false;
3063 size_t gap = 0x400000;
3064
3065 // Assert only that the size is a multiple of the page size, since
3066 // that's all that mmap requires, and since that's all we really know
3067 // about at this low abstraction level. If we need higher alignment,
3068 // we can either pass an alignment to this method or verify alignment
3069 // in one of the methods further up the call chain. See bug 5044738.
3070 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
3071
3072 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
3073 // Give it a try, if the kernel honors the hint we can return immediately.
3074 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
3075 volatile int err = errno;
3076 if (addr == requested_addr) {
3077 return addr;
3078 } else if (addr != NULL) {
3079 unmap_memory(addr, bytes);
3080 }
3081
3082 if (PrintMiscellaneous && Verbose) {
3083 char buf[256];
3084 buf[0] = '\0';
3085 if (addr == NULL) {
3086 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err));
3087 }
3088 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
3089 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
3090 "%s", bytes, requested_addr, addr, buf);
3091 }
3092
3093 // Address hint method didn't work. Fall back to the old method.
3094 // In theory, once SNV becomes our oldest supported platform, this
3095 // code will no longer be needed.
3096 //
3097 // Repeatedly allocate blocks until the block is allocated at the
3098 // right spot. Give up after max_tries.
3099 int i;
3100 for (i = 0; i < max_tries; ++i) {
3101 base[i] = reserve_memory(bytes);
3102
3103 if (base[i] != NULL) {
3104 // Is this the block we wanted?
3105 if (base[i] == requested_addr) {
3106 size[i] = bytes;
3107 break;
3108 }
3109
3110 // check that the gap value is right
3111 if (had_top_overlap && !have_adjusted_gap) {
3112 size_t actual_gap = base[i-1] - base[i] - bytes;
3113 if (gap != actual_gap) {
3114 // adjust the gap value and retry the last 2 allocations
3115 assert(i > 0, "gap adjustment code problem");
3116 have_adjusted_gap = true; // adjust the gap only once, just in case
3117 gap = actual_gap;
3118 if (PrintMiscellaneous && Verbose) {
3119 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
3120 }
3121 unmap_memory(base[i], bytes);
3122 unmap_memory(base[i-1], size[i-1]);
3123 i-=2;
3124 continue;
3125 }
3126 }
3127
3128 // Does this overlap the block we wanted? Give back the overlapped
3129 // parts and try again.
3130 //
3131 // There is still a bug in this code: if top_overlap == bytes,
3132 // the overlap is offset from requested region by the value of gap.
3133 // In this case giving back the overlapped part will not work,
3134 // because we'll give back the entire block at base[i] and
3135 // therefore the subsequent allocation will not generate a new gap.
3136 // This could be fixed with a new algorithm that used larger
3137 // or variable size chunks to find the requested region -
3138 // but such a change would introduce additional complications.
3139 // It's rare enough that the planets align for this bug,
3140 // so we'll just wait for a fix for 6204603/5003415 which
3141 // will provide a mmap flag to allow us to avoid this business.
3142
3143 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
3144 if (top_overlap >= 0 && top_overlap < bytes) {
3145 had_top_overlap = true;
3146 unmap_memory(base[i], top_overlap);
3147 base[i] += top_overlap;
3148 size[i] = bytes - top_overlap;
3149 } else {
3150 size_t bottom_overlap = base[i] + bytes - requested_addr;
3151 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
3152 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) {
3153 warning("attempt_reserve_memory_at: possible alignment bug");
3154 }
3155 unmap_memory(requested_addr, bottom_overlap);
3156 size[i] = bytes - bottom_overlap;
3157 } else {
3158 size[i] = bytes;
3159 }
3160 }
3161 }
3162 }
3163
3164 // Give back the unused reserved pieces.
3165
3166 for (int j = 0; j < i; ++j) {
3167 if (base[j] != NULL) {
3168 unmap_memory(base[j], size[j]);
3169 }
3170 }
3171
3172 return (i < max_tries) ? requested_addr : NULL;
3173 }
3174
3175 bool os::pd_release_memory(char* addr, size_t bytes) {
3176 size_t size = bytes;
3177 return munmap(addr, size) == 0;
3178 }
3179
3180 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
3181 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()),
3182 "addr must be page aligned");
3183 int retVal = mprotect(addr, bytes, prot);
3184 return retVal == 0;
3185 }
3186
3187 // Protect memory (Used to pass readonly pages through
3188 // JNI GetArray<type>Elements with empty arrays.)
3189 // Also, used for serialization page and for compressed oops null pointer
3190 // checking.
3191 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3192 bool is_committed) {
3193 unsigned int p = 0;
3194 switch (prot) {
3195 case MEM_PROT_NONE: p = PROT_NONE; break;
3196 case MEM_PROT_READ: p = PROT_READ; break;
3197 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
3198 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
3199 default:
3200 ShouldNotReachHere();
3201 }
3202 // is_committed is unused.
3203 return solaris_mprotect(addr, bytes, p);
3204 }
3205
3206 // guard_memory and unguard_memory only happens within stack guard pages.
3207 // Since ISM pertains only to the heap, guard and unguard memory should not
3208 /// happen with an ISM region.
3209 bool os::guard_memory(char* addr, size_t bytes) {
3210 return solaris_mprotect(addr, bytes, PROT_NONE);
3211 }
3212
3213 bool os::unguard_memory(char* addr, size_t bytes) {
3214 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
3215 }
3216
3217 // Large page support
3218
3219 // UseLargePages is the master flag to enable/disable large page memory.
3220 // UseMPSS and UseISM are supported for compatibility reasons. Their combined
3221 // effects can be described in the following table:
3222 //
3223 // UseLargePages UseMPSS UseISM
3224 // false * * => UseLargePages is the master switch, turning
3225 // it off will turn off both UseMPSS and
3226 // UseISM. VM will not use large page memory
3227 // regardless the settings of UseMPSS/UseISM.
3228 // true false false => Unless future Solaris provides other
3229 // mechanism to use large page memory, this
3230 // combination is equivalent to -UseLargePages,
3231 // VM will not use large page memory
3232 // true true false => JVM will use MPSS for large page memory.
3233 // This is the default behavior.
3234 // true false true => JVM will use ISM for large page memory.
3235 // true true true => JVM will use ISM if it is available.
3236 // Otherwise, JVM will fall back to MPSS.
3237 // Becaues ISM is now available on all
3238 // supported Solaris versions, this combination
3239 // is equivalent to +UseISM -UseMPSS.
3240
3241 static size_t _large_page_size = 0;
3242
3243 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) {
3244 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address
3245 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc
3246 // can support multiple page sizes.
3247
3248 // Don't bother to probe page size because getpagesizes() comes with MPSS.
3249 // ISM is only recommended on old Solaris where there is no MPSS support.
3250 // Simply choose a conservative value as default.
3251 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes :
3252 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M)
3253 ARM_ONLY(2 * M);
3254
3255 // ISM is available on all supported Solaris versions
3256 return true;
3257 }
3258
3259 // Insertion sort for small arrays (descending order).
3260 static void insertion_sort_descending(size_t* array, int len) {
3261 for (int i = 0; i < len; i++) {
3262 size_t val = array[i];
3263 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
3264 size_t tmp = array[key];
3265 array[key] = array[key - 1];
3266 array[key - 1] = tmp;
3267 }
3268 }
3269 }
3270
3271 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) {
3272 const unsigned int usable_count = VM_Version::page_size_count();
3273 if (usable_count == 1) {
3274 return false;
3275 }
3276
3277 // Find the right getpagesizes interface. When solaris 11 is the minimum
3278 // build platform, getpagesizes() (without the '2') can be called directly.
3279 typedef int (*gps_t)(size_t[], int);
3280 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
3281 if (gps_func == NULL) {
3282 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
3283 if (gps_func == NULL) {
3284 if (warn) {
3285 warning("MPSS is not supported by the operating system.");
3286 }
3287 return false;
3288 }
3289 }
3290
3291 // Fill the array of page sizes.
3292 int n = (*gps_func)(_page_sizes, page_sizes_max);
3293 assert(n > 0, "Solaris bug?");
3294
3295 if (n == page_sizes_max) {
3296 // Add a sentinel value (necessary only if the array was completely filled
3297 // since it is static (zeroed at initialization)).
3298 _page_sizes[--n] = 0;
3299 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
3300 }
3301 assert(_page_sizes[n] == 0, "missing sentinel");
3302 trace_page_sizes("available page sizes", _page_sizes, n);
3303
3304 if (n == 1) return false; // Only one page size available.
3305
3306 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
3307 // select up to usable_count elements. First sort the array, find the first
3308 // acceptable value, then copy the usable sizes to the top of the array and
3309 // trim the rest. Make sure to include the default page size :-).
3310 //
3311 // A better policy could get rid of the 4M limit by taking the sizes of the
3312 // important VM memory regions (java heap and possibly the code cache) into
3313 // account.
3314 insertion_sort_descending(_page_sizes, n);
3315 const size_t size_limit =
3316 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
3317 int beg;
3318 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ;
3319 const int end = MIN2((int)usable_count, n) - 1;
3320 for (int cur = 0; cur < end; ++cur, ++beg) {
3321 _page_sizes[cur] = _page_sizes[beg];
3322 }
3323 _page_sizes[end] = vm_page_size();
3324 _page_sizes[end + 1] = 0;
3325
3326 if (_page_sizes[end] > _page_sizes[end - 1]) {
3327 // Default page size is not the smallest; sort again.
3328 insertion_sort_descending(_page_sizes, end + 1);
3329 }
3330 *page_size = _page_sizes[0];
3331
3332 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
3333 return true;
3334 }
3335
3336 void os::large_page_init() {
3337 if (!UseLargePages) {
3338 UseISM = false;
3339 UseMPSS = false;
3340 return;
3341 }
3342
3343 // print a warning if any large page related flag is specified on command line
3344 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
3345 !FLAG_IS_DEFAULT(UseISM) ||
3346 !FLAG_IS_DEFAULT(UseMPSS) ||
3347 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
3348 UseISM = UseISM &&
3349 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size);
3350 if (UseISM) {
3351 // ISM disables MPSS to be compatible with old JDK behavior
3352 UseMPSS = false;
3353 _page_sizes[0] = _large_page_size;
3354 _page_sizes[1] = vm_page_size();
3355 }
3356
3357 UseMPSS = UseMPSS &&
3358 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
3359
3360 UseLargePages = UseISM || UseMPSS;
3361 }
3362
3363 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) {
3364 // Signal to OS that we want large pages for addresses
3365 // from addr, addr + bytes
3366 struct memcntl_mha mpss_struct;
3367 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
3368 mpss_struct.mha_pagesize = align;
3369 mpss_struct.mha_flags = 0;
3370 if (memcntl(start, bytes, MC_HAT_ADVISE,
3371 (caddr_t) &mpss_struct, 0, 0) < 0) {
3372 debug_only(warning("Attempt to use MPSS failed."));
3373 return false;
3374 }
3375 return true;
3376 }
3377
3378 char* os::reserve_memory_special(size_t size, char* addr, bool exec) {
3379 // "exec" is passed in but not used. Creating the shared image for
3380 // the code cache doesn't have an SHM_X executable permission to check.
3381 assert(UseLargePages && UseISM, "only for ISM large pages");
3382
3383 char* retAddr = NULL;
3384 int shmid;
3385 key_t ismKey;
3386
3387 bool warn_on_failure = UseISM &&
3388 (!FLAG_IS_DEFAULT(UseLargePages) ||
3389 !FLAG_IS_DEFAULT(UseISM) ||
3390 !FLAG_IS_DEFAULT(LargePageSizeInBytes)
3391 );
3392 char msg[128];
3393
3394 ismKey = IPC_PRIVATE;
3395
3396 // Create a large shared memory region to attach to based on size.
3397 // Currently, size is the total size of the heap
3398 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT);
3399 if (shmid == -1){
3400 if (warn_on_failure) {
3401 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
3402 warning(msg);
3403 }
3404 return NULL;
3405 }
3406
3407 // Attach to the region
3408 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W);
3409 int err = errno;
3410
3411 // Remove shmid. If shmat() is successful, the actual shared memory segment
3412 // will be deleted when it's detached by shmdt() or when the process
3413 // terminates. If shmat() is not successful this will remove the shared
3414 // segment immediately.
3415 shmctl(shmid, IPC_RMID, NULL);
3416
3417 if (retAddr == (char *) -1) {
3418 if (warn_on_failure) {
3419 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
3420 warning(msg);
3421 }
3422 return NULL;
3423 }
3424 if ((retAddr != NULL) && UseNUMAInterleaving) {
3425 numa_make_global(retAddr, size);
3426 }
3427 return retAddr;
3428 }
3429
3430 bool os::release_memory_special(char* base, size_t bytes) {
3431 // detaching the SHM segment will also delete it, see reserve_memory_special()
3432 int rslt = shmdt(base);
3433 return rslt == 0;
3434 }
3435
3436 size_t os::large_page_size() {
3437 return _large_page_size;
3438 }
3439
3440 // MPSS allows application to commit large page memory on demand; with ISM
3441 // the entire memory region must be allocated as shared memory.
3442 bool os::can_commit_large_page_memory() {
3443 return UseISM ? false : true;
3444 }
3445
3446 bool os::can_execute_large_page_memory() {
3447 return UseISM ? false : true;
3448 }
3449
3450 static int os_sleep(jlong millis, bool interruptible) {
3451 const jlong limit = INT_MAX;
3452 jlong prevtime;
3453 int res;
3454
3455 while (millis > limit) {
3456 if ((res = os_sleep(limit, interruptible)) != OS_OK)
3457 return res;
3458 millis -= limit;
3459 }
3460
3461 // Restart interrupted polls with new parameters until the proper delay
3462 // has been completed.
3463
3464 prevtime = getTimeMillis();
3465
3466 while (millis > 0) {
3467 jlong newtime;
3468
3469 if (!interruptible) {
3470 // Following assert fails for os::yield_all:
3471 // assert(!thread->is_Java_thread(), "must not be java thread");
3472 res = poll(NULL, 0, millis);
3473 } else {
3474 JavaThread *jt = JavaThread::current();
3475
3476 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt,
3477 os::Solaris::clear_interrupted);
3478 }
3479
3480 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for
3481 // thread.Interrupt.
3482
3483 // See c/r 6751923. Poll can return 0 before time
3484 // has elapsed if time is set via clock_settime (as NTP does).
3485 // res == 0 if poll timed out (see man poll RETURN VALUES)
3486 // using the logic below checks that we really did
3487 // sleep at least "millis" if not we'll sleep again.
3488 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) {
3489 newtime = getTimeMillis();
3490 assert(newtime >= prevtime, "time moving backwards");
3491 /* Doing prevtime and newtime in microseconds doesn't help precision,
3492 and trying to round up to avoid lost milliseconds can result in a
3493 too-short delay. */
3494 millis -= newtime - prevtime;
3495 if(millis <= 0)
3496 return OS_OK;
3497 prevtime = newtime;
3498 } else
3499 return res;
3500 }
3501
3502 return OS_OK;
3503 }
3504
3505 // Read calls from inside the vm need to perform state transitions
3506 size_t os::read(int fd, void *buf, unsigned int nBytes) {
3507 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3508 }
3509
3510 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
3511 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted);
3512 }
3513
3514 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
3515 assert(thread == Thread::current(), "thread consistency check");
3516
3517 // TODO-FIXME: this should be removed.
3518 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock
3519 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate
3520 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving
3521 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel
3522 // is fooled into believing that the system is making progress. In the code below we block the
3523 // the watcher thread while safepoint is in progress so that it would not appear as though the
3524 // system is making progress.
3525 if (!Solaris::T2_libthread() &&
3526 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) {
3527 // We now try to acquire the threads lock. Since this lock is held by the VM thread during
3528 // the entire safepoint, the watcher thread will line up here during the safepoint.
3529 Threads_lock->lock_without_safepoint_check();
3530 Threads_lock->unlock();
3531 }
3532
3533 if (thread->is_Java_thread()) {
3534 // This is a JavaThread so we honor the _thread_blocked protocol
3535 // even for sleeps of 0 milliseconds. This was originally done
3536 // as a workaround for bug 4338139. However, now we also do it
3537 // to honor the suspend-equivalent protocol.
3538
3539 JavaThread *jt = (JavaThread *) thread;
3540 ThreadBlockInVM tbivm(jt);
3541
3542 jt->set_suspend_equivalent();
3543 // cleared by handle_special_suspend_equivalent_condition() or
3544 // java_suspend_self() via check_and_wait_while_suspended()
3545
3546 int ret_code;
3547 if (millis <= 0) {
3548 thr_yield();
3549 ret_code = 0;
3550 } else {
3551 // The original sleep() implementation did not create an
3552 // OSThreadWaitState helper for sleeps of 0 milliseconds.
3553 // I'm preserving that decision for now.
3554 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
3555
3556 ret_code = os_sleep(millis, interruptible);
3557 }
3558
3559 // were we externally suspended while we were waiting?
3560 jt->check_and_wait_while_suspended();
3561
3562 return ret_code;
3563 }
3564
3565 // non-JavaThread from this point on:
3566
3567 if (millis <= 0) {
3568 thr_yield();
3569 return 0;
3570 }
3571
3572 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
3573
3574 return os_sleep(millis, interruptible);
3575 }
3576
3577 int os::naked_sleep() {
3578 // %% make the sleep time an integer flag. for now use 1 millisec.
3579 return os_sleep(1, false);
3580 }
3581
3582 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3583 void os::infinite_sleep() {
3584 while (true) { // sleep forever ...
3585 ::sleep(100); // ... 100 seconds at a time
3586 }
3587 }
3588
3589 // Used to convert frequent JVM_Yield() to nops
3590 bool os::dont_yield() {
3591 if (DontYieldALot) {
3592 static hrtime_t last_time = 0;
3593 hrtime_t diff = getTimeNanos() - last_time;
3594
3595 if (diff < DontYieldALotInterval * 1000000)
3596 return true;
3597
3598 last_time += diff;
3599
3600 return false;
3601 }
3602 else {
3603 return false;
3604 }
3605 }
3606
3607 // Caveat: Solaris os::yield() causes a thread-state transition whereas
3608 // the linux and win32 implementations do not. This should be checked.
3609
3610 void os::yield() {
3611 // Yields to all threads with same or greater priority
3612 os::sleep(Thread::current(), 0, false);
3613 }
3614
3615 // Note that yield semantics are defined by the scheduling class to which
3616 // the thread currently belongs. Typically, yield will _not yield to
3617 // other equal or higher priority threads that reside on the dispatch queues
3618 // of other CPUs.
3619
3620 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; }
3621
3622
3623 // On Solaris we found that yield_all doesn't always yield to all other threads.
3624 // There have been cases where there is a thread ready to execute but it doesn't
3625 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond.
3626 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a
3627 // SIGWAITING signal which will cause a new lwp to be created. So we count the
3628 // number of times yield_all is called in the one loop and increase the sleep
3629 // time after 8 attempts. If this fails too we increase the concurrency level
3630 // so that the starving thread would get an lwp
3631
3632 void os::yield_all(int attempts) {
3633 // Yields to all threads, including threads with lower priorities
3634 if (attempts == 0) {
3635 os::sleep(Thread::current(), 1, false);
3636 } else {
3637 int iterations = attempts % 30;
3638 if (iterations == 0 && !os::Solaris::T2_libthread()) {
3639 // thr_setconcurrency and _getconcurrency make sense only under T1.
3640 int noofLWPS = thr_getconcurrency();
3641 if (noofLWPS < (Threads::number_of_threads() + 2)) {
3642 thr_setconcurrency(thr_getconcurrency() + 1);
3643 }
3644 } else if (iterations < 25) {
3645 os::sleep(Thread::current(), 1, false);
3646 } else {
3647 os::sleep(Thread::current(), 10, false);
3648 }
3649 }
3650 }
3651
3652 // Called from the tight loops to possibly influence time-sharing heuristics
3653 void os::loop_breaker(int attempts) {
3654 os::yield_all(attempts);
3655 }
3656
3657
3658 // Interface for setting lwp priorities. If we are using T2 libthread,
3659 // which forces the use of BoundThreads or we manually set UseBoundThreads,
3660 // all of our threads will be assigned to real lwp's. Using the thr_setprio
3661 // function is meaningless in this mode so we must adjust the real lwp's priority
3662 // The routines below implement the getting and setting of lwp priorities.
3663 //
3664 // Note: There are three priority scales used on Solaris. Java priotities
3665 // which range from 1 to 10, libthread "thr_setprio" scale which range
3666 // from 0 to 127, and the current scheduling class of the process we
3667 // are running in. This is typically from -60 to +60.
3668 // The setting of the lwp priorities in done after a call to thr_setprio
3669 // so Java priorities are mapped to libthread priorities and we map from
3670 // the latter to lwp priorities. We don't keep priorities stored in
3671 // Java priorities since some of our worker threads want to set priorities
3672 // higher than all Java threads.
3673 //
3674 // For related information:
3675 // (1) man -s 2 priocntl
3676 // (2) man -s 4 priocntl
3677 // (3) man dispadmin
3678 // = librt.so
3679 // = libthread/common/rtsched.c - thrp_setlwpprio().
3680 // = ps -cL <pid> ... to validate priority.
3681 // = sched_get_priority_min and _max
3682 // pthread_create
3683 // sched_setparam
3684 // pthread_setschedparam
3685 //
3686 // Assumptions:
3687 // + We assume that all threads in the process belong to the same
3688 // scheduling class. IE. an homogenous process.
3689 // + Must be root or in IA group to change change "interactive" attribute.
3690 // Priocntl() will fail silently. The only indication of failure is when
3691 // we read-back the value and notice that it hasn't changed.
3692 // + Interactive threads enter the runq at the head, non-interactive at the tail.
3693 // + For RT, change timeslice as well. Invariant:
3694 // constant "priority integral"
3695 // Konst == TimeSlice * (60-Priority)
3696 // Given a priority, compute appropriate timeslice.
3697 // + Higher numerical values have higher priority.
3698
3699 // sched class attributes
3700 typedef struct {
3701 int schedPolicy; // classID
3702 int maxPrio;
3703 int minPrio;
3704 } SchedInfo;
3705
3706
3707 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3708
3709 #ifdef ASSERT
3710 static int ReadBackValidate = 1;
3711 #endif
3712 static int myClass = 0;
3713 static int myMin = 0;
3714 static int myMax = 0;
3715 static int myCur = 0;
3716 static bool priocntl_enable = false;
3717
3718 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4
3719 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3720
3721 // Call the version of priocntl suitable for all supported versions
3722 // of Solaris. We need to call through this wrapper so that we can
3723 // build on Solaris 9 and run on Solaris 8, 9 and 10.
3724 //
3725 // This code should be removed if we ever stop supporting Solaris 8
3726 // and earlier releases.
3727
3728 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3729 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg);
3730 static priocntl_type priocntl_ptr = priocntl_stub;
3731
3732 // Stub to set the value of the real pointer, and then call the real
3733 // function.
3734
3735 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) {
3736 // Try Solaris 8- name only.
3737 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl");
3738 guarantee(tmp != NULL, "priocntl function not found.");
3739 priocntl_ptr = tmp;
3740 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg);
3741 }
3742
3743
3744 // lwp_priocntl_init
3745 //
3746 // Try to determine the priority scale for our process.
3747 //
3748 // Return errno or 0 if OK.
3749 //
3750 static
3751 int lwp_priocntl_init ()
3752 {
3753 int rslt;
3754 pcinfo_t ClassInfo;
3755 pcparms_t ParmInfo;
3756 int i;
3757
3758 if (!UseThreadPriorities) return 0;
3759
3760 // We are using Bound threads, we need to determine our priority ranges
3761 if (os::Solaris::T2_libthread() || UseBoundThreads) {
3762 // If ThreadPriorityPolicy is 1, switch tables
3763 if (ThreadPriorityPolicy == 1) {
3764 for (i = 0 ; i < CriticalPriority+1; i++)
3765 os::java_to_os_priority[i] = prio_policy1[i];
3766 }
3767 if (UseCriticalJavaThreadPriority) {
3768 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3769 // See set_native_priority() and set_lwp_class_and_priority().
3770 // Save original MaxPriority mapping in case attempt to
3771 // use critical priority fails.
3772 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3773 // Set negative to distinguish from other priorities
3774 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3775 }
3776 }
3777 // Not using Bound Threads, set to ThreadPolicy 1
3778 else {
3779 for ( i = 0 ; i < CriticalPriority+1; i++ ) {
3780 os::java_to_os_priority[i] = prio_policy1[i];
3781 }
3782 return 0;
3783 }
3784
3785 // Get IDs for a set of well-known scheduling classes.
3786 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3787 // the system. We should have a loop that iterates over the
3788 // classID values, which are known to be "small" integers.
3789
3790 strcpy(ClassInfo.pc_clname, "TS");
3791 ClassInfo.pc_cid = -1;
3792 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3793 if (rslt < 0) return errno;
3794 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3795 tsLimits.schedPolicy = ClassInfo.pc_cid;
3796 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3797 tsLimits.minPrio = -tsLimits.maxPrio;
3798
3799 strcpy(ClassInfo.pc_clname, "IA");
3800 ClassInfo.pc_cid = -1;
3801 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3802 if (rslt < 0) return errno;
3803 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3804 iaLimits.schedPolicy = ClassInfo.pc_cid;
3805 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3806 iaLimits.minPrio = -iaLimits.maxPrio;
3807
3808 strcpy(ClassInfo.pc_clname, "RT");
3809 ClassInfo.pc_cid = -1;
3810 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3811 if (rslt < 0) return errno;
3812 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3813 rtLimits.schedPolicy = ClassInfo.pc_cid;
3814 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3815 rtLimits.minPrio = 0;
3816
3817 strcpy(ClassInfo.pc_clname, "FX");
3818 ClassInfo.pc_cid = -1;
3819 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3820 if (rslt < 0) return errno;
3821 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3822 fxLimits.schedPolicy = ClassInfo.pc_cid;
3823 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3824 fxLimits.minPrio = 0;
3825
3826 // Query our "current" scheduling class.
3827 // This will normally be IA, TS or, rarely, FX or RT.
3828 memset(&ParmInfo, 0, sizeof(ParmInfo));
3829 ParmInfo.pc_cid = PC_CLNULL;
3830 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3831 if (rslt < 0) return errno;
3832 myClass = ParmInfo.pc_cid;
3833
3834 // We now know our scheduling classId, get specific information
3835 // about the class.
3836 ClassInfo.pc_cid = myClass;
3837 ClassInfo.pc_clname[0] = 0;
3838 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3839 if (rslt < 0) return errno;
3840
3841 if (ThreadPriorityVerbose) {
3842 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3843 }
3844
3845 memset(&ParmInfo, 0, sizeof(pcparms_t));
3846 ParmInfo.pc_cid = PC_CLNULL;
3847 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3848 if (rslt < 0) return errno;
3849
3850 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3851 myMin = rtLimits.minPrio;
3852 myMax = rtLimits.maxPrio;
3853 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3854 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3855 myMin = iaLimits.minPrio;
3856 myMax = iaLimits.maxPrio;
3857 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3858 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3859 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3860 myMin = tsLimits.minPrio;
3861 myMax = tsLimits.maxPrio;
3862 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3863 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3864 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3865 myMin = fxLimits.minPrio;
3866 myMax = fxLimits.maxPrio;
3867 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3868 } else {
3869 // No clue - punt
3870 if (ThreadPriorityVerbose)
3871 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname);
3872 return EINVAL; // no clue, punt
3873 }
3874
3875 if (ThreadPriorityVerbose) {
3876 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax);
3877 }
3878
3879 priocntl_enable = true; // Enable changing priorities
3880 return 0;
3881 }
3882
3883 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3884 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3885 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3886 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3887
3888
3889 // scale_to_lwp_priority
3890 //
3891 // Convert from the libthread "thr_setprio" scale to our current
3892 // lwp scheduling class scale.
3893 //
3894 static
3895 int scale_to_lwp_priority (int rMin, int rMax, int x)
3896 {
3897 int v;
3898
3899 if (x == 127) return rMax; // avoid round-down
3900 v = (((x*(rMax-rMin)))/128)+rMin;
3901 return v;
3902 }
3903
3904
3905 // set_lwp_class_and_priority
3906 //
3907 // Set the class and priority of the lwp. This call should only
3908 // be made when using bound threads (T2 threads are bound by default).
3909 //
3910 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3911 int newPrio, int new_class, bool scale) {
3912 int rslt;
3913 int Actual, Expected, prv;
3914 pcparms_t ParmInfo; // for GET-SET
3915 #ifdef ASSERT
3916 pcparms_t ReadBack; // for readback
3917 #endif
3918
3919 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3920 // Query current values.
3921 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3922 // Cache "pcparms_t" in global ParmCache.
3923 // TODO: elide set-to-same-value
3924
3925 // If something went wrong on init, don't change priorities.
3926 if ( !priocntl_enable ) {
3927 if (ThreadPriorityVerbose)
3928 tty->print_cr("Trying to set priority but init failed, ignoring");
3929 return EINVAL;
3930 }
3931
3932 // If lwp hasn't started yet, just return
3933 // the _start routine will call us again.
3934 if ( lwpid <= 0 ) {
3935 if (ThreadPriorityVerbose) {
3936 tty->print_cr ("deferring the set_lwp_class_and_priority of thread "
3937 INTPTR_FORMAT " to %d, lwpid not set",
3938 ThreadID, newPrio);
3939 }
3940 return 0;
3941 }
3942
3943 if (ThreadPriorityVerbose) {
3944 tty->print_cr ("set_lwp_class_and_priority("
3945 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3946 ThreadID, lwpid, newPrio);
3947 }
3948
3949 memset(&ParmInfo, 0, sizeof(pcparms_t));
3950 ParmInfo.pc_cid = PC_CLNULL;
3951 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3952 if (rslt < 0) return errno;
3953
3954 int cur_class = ParmInfo.pc_cid;
3955 ParmInfo.pc_cid = (id_t)new_class;
3956
3957 if (new_class == rtLimits.schedPolicy) {
3958 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3959 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3960 rtLimits.maxPrio, newPrio)
3961 : newPrio;
3962 rtInfo->rt_tqsecs = RT_NOCHANGE;
3963 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3964 if (ThreadPriorityVerbose) {
3965 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3966 }
3967 } else if (new_class == iaLimits.schedPolicy) {
3968 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3969 int maxClamped = MIN2(iaLimits.maxPrio,
3970 cur_class == new_class
3971 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3972 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3973 maxClamped, newPrio)
3974 : newPrio;
3975 iaInfo->ia_uprilim = cur_class == new_class
3976 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3977 iaInfo->ia_mode = IA_NOCHANGE;
3978 if (ThreadPriorityVerbose) {
3979 tty->print_cr("IA: [%d...%d] %d->%d\n",
3980 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3981 }
3982 } else if (new_class == tsLimits.schedPolicy) {
3983 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3984 int maxClamped = MIN2(tsLimits.maxPrio,
3985 cur_class == new_class
3986 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3987 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3988 maxClamped, newPrio)
3989 : newPrio;
3990 tsInfo->ts_uprilim = cur_class == new_class
3991 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3992 if (ThreadPriorityVerbose) {
3993 tty->print_cr("TS: [%d...%d] %d->%d\n",
3994 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3995 }
3996 } else if (new_class == fxLimits.schedPolicy) {
3997 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3998 int maxClamped = MIN2(fxLimits.maxPrio,
3999 cur_class == new_class
4000 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
4001 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
4002 maxClamped, newPrio)
4003 : newPrio;
4004 fxInfo->fx_uprilim = cur_class == new_class
4005 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
4006 fxInfo->fx_tqsecs = FX_NOCHANGE;
4007 fxInfo->fx_tqnsecs = FX_NOCHANGE;
4008 if (ThreadPriorityVerbose) {
4009 tty->print_cr("FX: [%d...%d] %d->%d\n",
4010 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
4011 }
4012 } else {
4013 if (ThreadPriorityVerbose) {
4014 tty->print_cr("Unknown new scheduling class %d\n", new_class);
4015 }
4016 return EINVAL; // no clue, punt
4017 }
4018
4019 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
4020 if (ThreadPriorityVerbose && rslt) {
4021 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
4022 }
4023 if (rslt < 0) return errno;
4024
4025 #ifdef ASSERT
4026 // Sanity check: read back what we just attempted to set.
4027 // In theory it could have changed in the interim ...
4028 //
4029 // The priocntl system call is tricky.
4030 // Sometimes it'll validate the priority value argument and
4031 // return EINVAL if unhappy. At other times it fails silently.
4032 // Readbacks are prudent.
4033
4034 if (!ReadBackValidate) return 0;
4035
4036 memset(&ReadBack, 0, sizeof(pcparms_t));
4037 ReadBack.pc_cid = PC_CLNULL;
4038 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
4039 assert(rslt >= 0, "priocntl failed");
4040 Actual = Expected = 0xBAD;
4041 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
4042 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
4043 Actual = RTPRI(ReadBack)->rt_pri;
4044 Expected = RTPRI(ParmInfo)->rt_pri;
4045 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
4046 Actual = IAPRI(ReadBack)->ia_upri;
4047 Expected = IAPRI(ParmInfo)->ia_upri;
4048 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
4049 Actual = TSPRI(ReadBack)->ts_upri;
4050 Expected = TSPRI(ParmInfo)->ts_upri;
4051 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
4052 Actual = FXPRI(ReadBack)->fx_upri;
4053 Expected = FXPRI(ParmInfo)->fx_upri;
4054 } else {
4055 if (ThreadPriorityVerbose) {
4056 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
4057 ParmInfo.pc_cid);
4058 }
4059 }
4060
4061 if (Actual != Expected) {
4062 if (ThreadPriorityVerbose) {
4063 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
4064 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
4065 }
4066 }
4067 #endif
4068
4069 return 0;
4070 }
4071
4072 // Solaris only gives access to 128 real priorities at a time,
4073 // so we expand Java's ten to fill this range. This would be better
4074 // if we dynamically adjusted relative priorities.
4075 //
4076 // The ThreadPriorityPolicy option allows us to select 2 different
4077 // priority scales.
4078 //
4079 // ThreadPriorityPolicy=0
4080 // Since the Solaris' default priority is MaximumPriority, we do not
4081 // set a priority lower than Max unless a priority lower than
4082 // NormPriority is requested.
4083 //
4084 // ThreadPriorityPolicy=1
4085 // This mode causes the priority table to get filled with
4086 // linear values. NormPriority get's mapped to 50% of the
4087 // Maximum priority an so on. This will cause VM threads
4088 // to get unfair treatment against other Solaris processes
4089 // which do not explicitly alter their thread priorities.
4090 //
4091
4092 int os::java_to_os_priority[CriticalPriority + 1] = {
4093 -99999, // 0 Entry should never be used
4094
4095 0, // 1 MinPriority
4096 32, // 2
4097 64, // 3
4098
4099 96, // 4
4100 127, // 5 NormPriority
4101 127, // 6
4102
4103 127, // 7
4104 127, // 8
4105 127, // 9 NearMaxPriority
4106
4107 127, // 10 MaxPriority
4108
4109 -criticalPrio // 11 CriticalPriority
4110 };
4111
4112 OSReturn os::set_native_priority(Thread* thread, int newpri) {
4113 OSThread* osthread = thread->osthread();
4114
4115 // Save requested priority in case the thread hasn't been started
4116 osthread->set_native_priority(newpri);
4117
4118 // Check for critical priority request
4119 bool fxcritical = false;
4120 if (newpri == -criticalPrio) {
4121 fxcritical = true;
4122 newpri = criticalPrio;
4123 }
4124
4125 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
4126 if (!UseThreadPriorities) return OS_OK;
4127
4128 int status = 0;
4129
4130 if (!fxcritical) {
4131 // Use thr_setprio only if we have a priority that thr_setprio understands
4132 status = thr_setprio(thread->osthread()->thread_id(), newpri);
4133 }
4134
4135 if (os::Solaris::T2_libthread() ||
4136 (UseBoundThreads && osthread->is_vm_created())) {
4137 int lwp_status =
4138 set_lwp_class_and_priority(osthread->thread_id(),
4139 osthread->lwp_id(),
4140 newpri,
4141 fxcritical ? fxLimits.schedPolicy : myClass,
4142 !fxcritical);
4143 if (lwp_status != 0 && fxcritical) {
4144 // Try again, this time without changing the scheduling class
4145 newpri = java_MaxPriority_to_os_priority;
4146 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
4147 osthread->lwp_id(),
4148 newpri, myClass, false);
4149 }
4150 status |= lwp_status;
4151 }
4152 return (status == 0) ? OS_OK : OS_ERR;
4153 }
4154
4155
4156 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
4157 int p;
4158 if ( !UseThreadPriorities ) {
4159 *priority_ptr = NormalPriority;
4160 return OS_OK;
4161 }
4162 int status = thr_getprio(thread->osthread()->thread_id(), &p);
4163 if (status != 0) {
4164 return OS_ERR;
4165 }
4166 *priority_ptr = p;
4167 return OS_OK;
4168 }
4169
4170
4171 // Hint to the underlying OS that a task switch would not be good.
4172 // Void return because it's a hint and can fail.
4173 void os::hint_no_preempt() {
4174 schedctl_start(schedctl_init());
4175 }
4176
4177 void os::interrupt(Thread* thread) {
4178 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4179
4180 OSThread* osthread = thread->osthread();
4181
4182 int isInterrupted = osthread->interrupted();
4183 if (!isInterrupted) {
4184 osthread->set_interrupted(true);
4185 OrderAccess::fence();
4186 // os::sleep() is implemented with either poll (NULL,0,timeout) or
4187 // by parking on _SleepEvent. If the former, thr_kill will unwedge
4188 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper.
4189 ParkEvent * const slp = thread->_SleepEvent ;
4190 if (slp != NULL) slp->unpark() ;
4191 }
4192
4193 // For JSR166: unpark after setting status but before thr_kill -dl
4194 if (thread->is_Java_thread()) {
4195 ((JavaThread*)thread)->parker()->unpark();
4196 }
4197
4198 // Handle interruptible wait() ...
4199 ParkEvent * const ev = thread->_ParkEvent ;
4200 if (ev != NULL) ev->unpark() ;
4201
4202 // When events are used everywhere for os::sleep, then this thr_kill
4203 // will only be needed if UseVMInterruptibleIO is true.
4204
4205 if (!isInterrupted) {
4206 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt());
4207 assert_status(status == 0, status, "thr_kill");
4208
4209 // Bump thread interruption counter
4210 RuntimeService::record_thread_interrupt_signaled_count();
4211 }
4212 }
4213
4214
4215 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
4216 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer");
4217
4218 OSThread* osthread = thread->osthread();
4219
4220 bool res = osthread->interrupted();
4221
4222 // NOTE that since there is no "lock" around these two operations,
4223 // there is the possibility that the interrupted flag will be
4224 // "false" but that the interrupt event will be set. This is
4225 // intentional. The effect of this is that Object.wait() will appear
4226 // to have a spurious wakeup, which is not harmful, and the
4227 // possibility is so rare that it is not worth the added complexity
4228 // to add yet another lock. It has also been recommended not to put
4229 // the interrupted flag into the os::Solaris::Event structure,
4230 // because it hides the issue.
4231 if (res && clear_interrupted) {
4232 osthread->set_interrupted(false);
4233 }
4234 return res;
4235 }
4236
4237
4238 void os::print_statistics() {
4239 }
4240
4241 int os::message_box(const char* title, const char* message) {
4242 int i;
4243 fdStream err(defaultStream::error_fd());
4244 for (i = 0; i < 78; i++) err.print_raw("=");
4245 err.cr();
4246 err.print_raw_cr(title);
4247 for (i = 0; i < 78; i++) err.print_raw("-");
4248 err.cr();
4249 err.print_raw_cr(message);
4250 for (i = 0; i < 78; i++) err.print_raw("=");
4251 err.cr();
4252
4253 char buf[16];
4254 // Prevent process from exiting upon "read error" without consuming all CPU
4255 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
4256
4257 return buf[0] == 'y' || buf[0] == 'Y';
4258 }
4259
4260 // A lightweight implementation that does not suspend the target thread and
4261 // thus returns only a hint. Used for profiling only!
4262 ExtendedPC os::get_thread_pc(Thread* thread) {
4263 // Make sure that it is called by the watcher and the Threads lock is owned.
4264 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock");
4265 // For now, is only used to profile the VM Thread
4266 assert(thread->is_VM_thread(), "Can only be called for VMThread");
4267 ExtendedPC epc;
4268
4269 GetThreadPC_Callback cb(ProfileVM_lock);
4270 OSThread *osthread = thread->osthread();
4271 const int time_to_wait = 400; // 400ms wait for initial response
4272 int status = cb.interrupt(thread, time_to_wait);
4273
4274 if (cb.is_done() ) {
4275 epc = cb.addr();
4276 } else {
4277 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status",
4278 osthread->thread_id(), status););
4279 // epc is already NULL
4280 }
4281 return epc;
4282 }
4283
4284
4285 // This does not do anything on Solaris. This is basically a hook for being
4286 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
4287 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
4288 f(value, method, args, thread);
4289 }
4290
4291 // This routine may be used by user applications as a "hook" to catch signals.
4292 // The user-defined signal handler must pass unrecognized signals to this
4293 // routine, and if it returns true (non-zero), then the signal handler must
4294 // return immediately. If the flag "abort_if_unrecognized" is true, then this
4295 // routine will never retun false (zero), but instead will execute a VM panic
4296 // routine kill the process.
4297 //
4298 // If this routine returns false, it is OK to call it again. This allows
4299 // the user-defined signal handler to perform checks either before or after
4300 // the VM performs its own checks. Naturally, the user code would be making
4301 // a serious error if it tried to handle an exception (such as a null check
4302 // or breakpoint) that the VM was generating for its own correct operation.
4303 //
4304 // This routine may recognize any of the following kinds of signals:
4305 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
4306 // os::Solaris::SIGasync
4307 // It should be consulted by handlers for any of those signals.
4308 // It explicitly does not recognize os::Solaris::SIGinterrupt
4309 //
4310 // The caller of this routine must pass in the three arguments supplied
4311 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
4312 // field of the structure passed to sigaction(). This routine assumes that
4313 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
4314 //
4315 // Note that the VM will print warnings if it detects conflicting signal
4316 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
4317 //
4318 extern "C" JNIEXPORT int
4319 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext,
4320 int abort_if_unrecognized);
4321
4322
4323 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
4324 JVM_handle_solaris_signal(sig, info, ucVoid, true);
4325 }
4326
4327 /* Do not delete - if guarantee is ever removed, a signal handler (even empty)
4328 is needed to provoke threads blocked on IO to return an EINTR
4329 Note: this explicitly does NOT call JVM_handle_solaris_signal and
4330 does NOT participate in signal chaining due to requirement for
4331 NOT setting SA_RESTART to make EINTR work. */
4332 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) {
4333 if (UseSignalChaining) {
4334 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig);
4335 if (actp && actp->sa_handler) {
4336 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs");
4337 }
4338 }
4339 }
4340
4341 // This boolean allows users to forward their own non-matching signals
4342 // to JVM_handle_solaris_signal, harmlessly.
4343 bool os::Solaris::signal_handlers_are_installed = false;
4344
4345 // For signal-chaining
4346 bool os::Solaris::libjsig_is_loaded = false;
4347 typedef struct sigaction *(*get_signal_t)(int);
4348 get_signal_t os::Solaris::get_signal_action = NULL;
4349
4350 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
4351 struct sigaction *actp = NULL;
4352
4353 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) {
4354 // Retrieve the old signal handler from libjsig
4355 actp = (*get_signal_action)(sig);
4356 }
4357 if (actp == NULL) {
4358 // Retrieve the preinstalled signal handler from jvm
4359 actp = get_preinstalled_handler(sig);
4360 }
4361
4362 return actp;
4363 }
4364
4365 static bool call_chained_handler(struct sigaction *actp, int sig,
4366 siginfo_t *siginfo, void *context) {
4367 // Call the old signal handler
4368 if (actp->sa_handler == SIG_DFL) {
4369 // It's more reasonable to let jvm treat it as an unexpected exception
4370 // instead of taking the default action.
4371 return false;
4372 } else if (actp->sa_handler != SIG_IGN) {
4373 if ((actp->sa_flags & SA_NODEFER) == 0) {
4374 // automaticlly block the signal
4375 sigaddset(&(actp->sa_mask), sig);
4376 }
4377
4378 sa_handler_t hand;
4379 sa_sigaction_t sa;
4380 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
4381 // retrieve the chained handler
4382 if (siginfo_flag_set) {
4383 sa = actp->sa_sigaction;
4384 } else {
4385 hand = actp->sa_handler;
4386 }
4387
4388 if ((actp->sa_flags & SA_RESETHAND) != 0) {
4389 actp->sa_handler = SIG_DFL;
4390 }
4391
4392 // try to honor the signal mask
4393 sigset_t oset;
4394 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset);
4395
4396 // call into the chained handler
4397 if (siginfo_flag_set) {
4398 (*sa)(sig, siginfo, context);
4399 } else {
4400 (*hand)(sig);
4401 }
4402
4403 // restore the signal mask
4404 thr_sigsetmask(SIG_SETMASK, &oset, 0);
4405 }
4406 // Tell jvm's signal handler the signal is taken care of.
4407 return true;
4408 }
4409
4410 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
4411 bool chained = false;
4412 // signal-chaining
4413 if (UseSignalChaining) {
4414 struct sigaction *actp = get_chained_signal_action(sig);
4415 if (actp != NULL) {
4416 chained = call_chained_handler(actp, sig, siginfo, context);
4417 }
4418 }
4419 return chained;
4420 }
4421
4422 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
4423 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4424 if (preinstalled_sigs[sig] != 0) {
4425 return &chainedsigactions[sig];
4426 }
4427 return NULL;
4428 }
4429
4430 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
4431
4432 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
4433 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized");
4434 chainedsigactions[sig] = oldAct;
4435 preinstalled_sigs[sig] = 1;
4436 }
4437
4438 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) {
4439 // Check for overwrite.
4440 struct sigaction oldAct;
4441 sigaction(sig, (struct sigaction*)NULL, &oldAct);
4442 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4443 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4444 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
4445 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
4446 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
4447 if (AllowUserSignalHandlers || !set_installed) {
4448 // Do not overwrite; user takes responsibility to forward to us.
4449 return;
4450 } else if (UseSignalChaining) {
4451 if (oktochain) {
4452 // save the old handler in jvm
4453 save_preinstalled_handler(sig, oldAct);
4454 } else {
4455 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
4456 }
4457 // libjsig also interposes the sigaction() call below and saves the
4458 // old sigaction on it own.
4459 } else {
4460 fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
4461 "%#lx for signal %d.", (long)oldhand, sig));
4462 }
4463 }
4464
4465 struct sigaction sigAct;
4466 sigfillset(&(sigAct.sa_mask));
4467 sigAct.sa_handler = SIG_DFL;
4468
4469 sigAct.sa_sigaction = signalHandler;
4470 // Handle SIGSEGV on alternate signal stack if
4471 // not using stack banging
4472 if (!UseStackBanging && sig == SIGSEGV) {
4473 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
4474 // Interruptible i/o requires SA_RESTART cleared so EINTR
4475 // is returned instead of restarting system calls
4476 } else if (sig == os::Solaris::SIGinterrupt()) {
4477 sigemptyset(&sigAct.sa_mask);
4478 sigAct.sa_handler = NULL;
4479 sigAct.sa_flags = SA_SIGINFO;
4480 sigAct.sa_sigaction = sigINTRHandler;
4481 } else {
4482 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
4483 }
4484 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
4485
4486 sigaction(sig, &sigAct, &oldAct);
4487
4488 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
4489 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
4490 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
4491 }
4492
4493
4494 #define DO_SIGNAL_CHECK(sig) \
4495 if (!sigismember(&check_signal_done, sig)) \
4496 os::Solaris::check_signal_handler(sig)
4497
4498 // This method is a periodic task to check for misbehaving JNI applications
4499 // under CheckJNI, we can add any periodic checks here
4500
4501 void os::run_periodic_checks() {
4502 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
4503 // thereby preventing a NULL checks.
4504 if(!check_addr0_done) check_addr0_done = check_addr0(tty);
4505
4506 if (check_signals == false) return;
4507
4508 // SEGV and BUS if overridden could potentially prevent
4509 // generation of hs*.log in the event of a crash, debugging
4510 // such a case can be very challenging, so we absolutely
4511 // check for the following for a good measure:
4512 DO_SIGNAL_CHECK(SIGSEGV);
4513 DO_SIGNAL_CHECK(SIGILL);
4514 DO_SIGNAL_CHECK(SIGFPE);
4515 DO_SIGNAL_CHECK(SIGBUS);
4516 DO_SIGNAL_CHECK(SIGPIPE);
4517 DO_SIGNAL_CHECK(SIGXFSZ);
4518
4519 // ReduceSignalUsage allows the user to override these handlers
4520 // see comments at the very top and jvm_solaris.h
4521 if (!ReduceSignalUsage) {
4522 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
4523 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
4524 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
4525 DO_SIGNAL_CHECK(BREAK_SIGNAL);
4526 }
4527
4528 // See comments above for using JVM1/JVM2 and UseAltSigs
4529 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt());
4530 DO_SIGNAL_CHECK(os::Solaris::SIGasync());
4531
4532 }
4533
4534 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
4535
4536 static os_sigaction_t os_sigaction = NULL;
4537
4538 void os::Solaris::check_signal_handler(int sig) {
4539 char buf[O_BUFLEN];
4540 address jvmHandler = NULL;
4541
4542 struct sigaction act;
4543 if (os_sigaction == NULL) {
4544 // only trust the default sigaction, in case it has been interposed
4545 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
4546 if (os_sigaction == NULL) return;
4547 }
4548
4549 os_sigaction(sig, (struct sigaction*)NULL, &act);
4550
4551 address thisHandler = (act.sa_flags & SA_SIGINFO)
4552 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
4553 : CAST_FROM_FN_PTR(address, act.sa_handler) ;
4554
4555
4556 switch(sig) {
4557 case SIGSEGV:
4558 case SIGBUS:
4559 case SIGFPE:
4560 case SIGPIPE:
4561 case SIGXFSZ:
4562 case SIGILL:
4563 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4564 break;
4565
4566 case SHUTDOWN1_SIGNAL:
4567 case SHUTDOWN2_SIGNAL:
4568 case SHUTDOWN3_SIGNAL:
4569 case BREAK_SIGNAL:
4570 jvmHandler = (address)user_handler();
4571 break;
4572
4573 default:
4574 int intrsig = os::Solaris::SIGinterrupt();
4575 int asynsig = os::Solaris::SIGasync();
4576
4577 if (sig == intrsig) {
4578 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler);
4579 } else if (sig == asynsig) {
4580 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
4581 } else {
4582 return;
4583 }
4584 break;
4585 }
4586
4587
4588 if (thisHandler != jvmHandler) {
4589 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
4590 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
4591 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
4592 // No need to check this sig any longer
4593 sigaddset(&check_signal_done, sig);
4594 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
4595 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
4596 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig));
4597 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags);
4598 // No need to check this sig any longer
4599 sigaddset(&check_signal_done, sig);
4600 }
4601
4602 // Print all the signal handler state
4603 if (sigismember(&check_signal_done, sig)) {
4604 print_signal_handlers(tty, buf, O_BUFLEN);
4605 }
4606
4607 }
4608
4609 void os::Solaris::install_signal_handlers() {
4610 bool libjsigdone = false;
4611 signal_handlers_are_installed = true;
4612
4613 // signal-chaining
4614 typedef void (*signal_setting_t)();
4615 signal_setting_t begin_signal_setting = NULL;
4616 signal_setting_t end_signal_setting = NULL;
4617 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4618 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
4619 if (begin_signal_setting != NULL) {
4620 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
4621 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
4622 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
4623 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
4624 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t,
4625 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version"));
4626 libjsig_is_loaded = true;
4627 if (os::Solaris::get_libjsig_version != NULL) {
4628 libjsigversion = (*os::Solaris::get_libjsig_version)();
4629 }
4630 assert(UseSignalChaining, "should enable signal-chaining");
4631 }
4632 if (libjsig_is_loaded) {
4633 // Tell libjsig jvm is setting signal handlers
4634 (*begin_signal_setting)();
4635 }
4636
4637 set_signal_handler(SIGSEGV, true, true);
4638 set_signal_handler(SIGPIPE, true, true);
4639 set_signal_handler(SIGXFSZ, true, true);
4640 set_signal_handler(SIGBUS, true, true);
4641 set_signal_handler(SIGILL, true, true);
4642 set_signal_handler(SIGFPE, true, true);
4643
4644
4645 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) {
4646
4647 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so
4648 // can not register overridable signals which might be > 32
4649 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) {
4650 // Tell libjsig jvm has finished setting signal handlers
4651 (*end_signal_setting)();
4652 libjsigdone = true;
4653 }
4654 }
4655
4656 // Never ok to chain our SIGinterrupt
4657 set_signal_handler(os::Solaris::SIGinterrupt(), true, false);
4658 set_signal_handler(os::Solaris::SIGasync(), true, true);
4659
4660 if (libjsig_is_loaded && !libjsigdone) {
4661 // Tell libjsig jvm finishes setting signal handlers
4662 (*end_signal_setting)();
4663 }
4664
4665 // We don't activate signal checker if libjsig is in place, we trust ourselves
4666 // and if UserSignalHandler is installed all bets are off.
4667 // Log that signal checking is off only if -verbose:jni is specified.
4668 if (CheckJNICalls) {
4669 if (libjsig_is_loaded) {
4670 if (PrintJNIResolving) {
4671 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
4672 }
4673 check_signals = false;
4674 }
4675 if (AllowUserSignalHandlers) {
4676 if (PrintJNIResolving) {
4677 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
4678 }
4679 check_signals = false;
4680 }
4681 }
4682 }
4683
4684
4685 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...);
4686
4687 const char * signames[] = {
4688 "SIG0",
4689 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP",
4690 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS",
4691 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM",
4692 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH",
4693 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT",
4694 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU",
4695 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW",
4696 "SIGCANCEL", "SIGLOST"
4697 };
4698
4699 const char* os::exception_name(int exception_code, char* buf, size_t size) {
4700 if (0 < exception_code && exception_code <= SIGRTMAX) {
4701 // signal
4702 if (exception_code < sizeof(signames)/sizeof(const char*)) {
4703 jio_snprintf(buf, size, "%s", signames[exception_code]);
4704 } else {
4705 jio_snprintf(buf, size, "SIG%d", exception_code);
4706 }
4707 return buf;
4708 } else {
4709 return NULL;
4710 }
4711 }
4712
4713 // (Static) wrappers for the new libthread API
4714 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate;
4715 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate;
4716 int_fnP_thread_t_i os::Solaris::_thr_setmutator;
4717 int_fnP_thread_t os::Solaris::_thr_suspend_mutator;
4718 int_fnP_thread_t os::Solaris::_thr_continue_mutator;
4719
4720 // (Static) wrapper for getisax(2) call.
4721 os::Solaris::getisax_func_t os::Solaris::_getisax = 0;
4722
4723 // (Static) wrappers for the liblgrp API
4724 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4725 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4726 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4727 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4728 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4729 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4730 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4731 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4732 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4733
4734 // (Static) wrapper for meminfo() call.
4735 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0;
4736
4737 static address resolve_symbol_lazy(const char* name) {
4738 address addr = (address) dlsym(RTLD_DEFAULT, name);
4739 if(addr == NULL) {
4740 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4741 addr = (address) dlsym(RTLD_NEXT, name);
4742 }
4743 return addr;
4744 }
4745
4746 static address resolve_symbol(const char* name) {
4747 address addr = resolve_symbol_lazy(name);
4748 if(addr == NULL) {
4749 fatal(dlerror());
4750 }
4751 return addr;
4752 }
4753
4754
4755
4756 // isT2_libthread()
4757 //
4758 // Routine to determine if we are currently using the new T2 libthread.
4759 //
4760 // We determine if we are using T2 by reading /proc/self/lstatus and
4761 // looking for a thread with the ASLWP bit set. If we find this status
4762 // bit set, we must assume that we are NOT using T2. The T2 team
4763 // has approved this algorithm.
4764 //
4765 // We need to determine if we are running with the new T2 libthread
4766 // since setting native thread priorities is handled differently
4767 // when using this library. All threads created using T2 are bound
4768 // threads. Calling thr_setprio is meaningless in this case.
4769 //
4770 bool isT2_libthread() {
4771 static prheader_t * lwpArray = NULL;
4772 static int lwpSize = 0;
4773 static int lwpFile = -1;
4774 lwpstatus_t * that;
4775 char lwpName [128];
4776 bool isT2 = false;
4777
4778 #define ADR(x) ((uintptr_t)(x))
4779 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1))))
4780
4781 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0);
4782 if (lwpFile < 0) {
4783 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n");
4784 return false;
4785 }
4786 lwpSize = 16*1024;
4787 for (;;) {
4788 ::lseek64 (lwpFile, 0, SEEK_SET);
4789 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize, mtInternal);
4790 if (::read(lwpFile, lwpArray, lwpSize) < 0) {
4791 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n");
4792 break;
4793 }
4794 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) {
4795 // We got a good snapshot - now iterate over the list.
4796 int aslwpcount = 0;
4797 for (int i = 0; i < lwpArray->pr_nent; i++ ) {
4798 that = LWPINDEX(lwpArray,i);
4799 if (that->pr_flags & PR_ASLWP) {
4800 aslwpcount++;
4801 }
4802 }
4803 if (aslwpcount == 0) isT2 = true;
4804 break;
4805 }
4806 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize;
4807 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); // retry.
4808 }
4809
4810 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal);
4811 ::close (lwpFile);
4812 if (ThreadPriorityVerbose) {
4813 if (isT2) tty->print_cr("We are running with a T2 libthread\n");
4814 else tty->print_cr("We are not running with a T2 libthread\n");
4815 }
4816 return isT2;
4817 }
4818
4819
4820 void os::Solaris::libthread_init() {
4821 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4822
4823 // Determine if we are running with the new T2 libthread
4824 os::Solaris::set_T2_libthread(isT2_libthread());
4825
4826 lwp_priocntl_init();
4827
4828 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4829 if(func == NULL) {
4830 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4831 // Guarantee that this VM is running on an new enough OS (5.6 or
4832 // later) that it will have a new enough libthread.so.
4833 guarantee(func != NULL, "libthread.so is too old.");
4834 }
4835
4836 // Initialize the new libthread getstate API wrappers
4837 func = resolve_symbol("thr_getstate");
4838 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func));
4839
4840 func = resolve_symbol("thr_setstate");
4841 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func));
4842
4843 func = resolve_symbol("thr_setmutator");
4844 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func));
4845
4846 func = resolve_symbol("thr_suspend_mutator");
4847 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4848
4849 func = resolve_symbol("thr_continue_mutator");
4850 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func));
4851
4852 int size;
4853 void (*handler_info_func)(address *, int *);
4854 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4855 handler_info_func(&handler_start, &size);
4856 handler_end = handler_start + size;
4857 }
4858
4859
4860 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4861 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4862 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4863 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4864 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4865 int os::Solaris::_mutex_scope = USYNC_THREAD;
4866
4867 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4868 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4869 int_fnP_cond_tP os::Solaris::_cond_signal;
4870 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4871 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4872 int_fnP_cond_tP os::Solaris::_cond_destroy;
4873 int os::Solaris::_cond_scope = USYNC_THREAD;
4874
4875 void os::Solaris::synchronization_init() {
4876 if(UseLWPSynchronization) {
4877 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4878 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4879 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4880 os::Solaris::set_mutex_init(lwp_mutex_init);
4881 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4882 os::Solaris::set_mutex_scope(USYNC_THREAD);
4883
4884 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4885 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4886 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4887 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4888 os::Solaris::set_cond_init(lwp_cond_init);
4889 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4890 os::Solaris::set_cond_scope(USYNC_THREAD);
4891 }
4892 else {
4893 os::Solaris::set_mutex_scope(USYNC_THREAD);
4894 os::Solaris::set_cond_scope(USYNC_THREAD);
4895
4896 if(UsePthreads) {
4897 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4898 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4899 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4900 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4901 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4902
4903 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4904 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4905 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4906 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4907 os::Solaris::set_cond_init(pthread_cond_default_init);
4908 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4909 }
4910 else {
4911 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4912 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4913 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4914 os::Solaris::set_mutex_init(::mutex_init);
4915 os::Solaris::set_mutex_destroy(::mutex_destroy);
4916
4917 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4918 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4919 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4920 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4921 os::Solaris::set_cond_init(::cond_init);
4922 os::Solaris::set_cond_destroy(::cond_destroy);
4923 }
4924 }
4925 }
4926
4927 bool os::Solaris::liblgrp_init() {
4928 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4929 if (handle != NULL) {
4930 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4931 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4932 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4933 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4934 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4935 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4936 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4937 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4938 dlsym(handle, "lgrp_cookie_stale")));
4939
4940 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4941 set_lgrp_cookie(c);
4942 return true;
4943 }
4944 return false;
4945 }
4946
4947 void os::Solaris::misc_sym_init() {
4948 address func;
4949
4950 // getisax
4951 func = resolve_symbol_lazy("getisax");
4952 if (func != NULL) {
4953 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func);
4954 }
4955
4956 // meminfo
4957 func = resolve_symbol_lazy("meminfo");
4958 if (func != NULL) {
4959 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func));
4960 }
4961 }
4962
4963 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) {
4964 assert(_getisax != NULL, "_getisax not set");
4965 return _getisax(array, n);
4966 }
4967
4968 // Symbol doesn't exist in Solaris 8 pset.h
4969 #ifndef PS_MYID
4970 #define PS_MYID -3
4971 #endif
4972
4973 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4974 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4975 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4976
4977 void init_pset_getloadavg_ptr(void) {
4978 pset_getloadavg_ptr =
4979 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4980 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) {
4981 warning("pset_getloadavg function not found");
4982 }
4983 }
4984
4985 int os::Solaris::_dev_zero_fd = -1;
4986
4987 // this is called _before_ the global arguments have been parsed
4988 void os::init(void) {
4989 _initial_pid = getpid();
4990
4991 max_hrtime = first_hrtime = gethrtime();
4992
4993 init_random(1234567);
4994
4995 page_size = sysconf(_SC_PAGESIZE);
4996 if (page_size == -1)
4997 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)",
4998 strerror(errno)));
4999 init_page_sizes((size_t) page_size);
5000
5001 Solaris::initialize_system_info();
5002
5003 // Initialize misc. symbols as soon as possible, so we can use them
5004 // if we need them.
5005 Solaris::misc_sym_init();
5006
5007 int fd = ::open("/dev/zero", O_RDWR);
5008 if (fd < 0) {
5009 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno)));
5010 } else {
5011 Solaris::set_dev_zero_fd(fd);
5012
5013 // Close on exec, child won't inherit.
5014 fcntl(fd, F_SETFD, FD_CLOEXEC);
5015 }
5016
5017 clock_tics_per_sec = CLK_TCK;
5018
5019 // check if dladdr1() exists; dladdr1 can provide more information than
5020 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
5021 // and is available on linker patches for 5.7 and 5.8.
5022 // libdl.so must have been loaded, this call is just an entry lookup
5023 void * hdl = dlopen("libdl.so", RTLD_NOW);
5024 if (hdl)
5025 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
5026
5027 // (Solaris only) this switches to calls that actually do locking.
5028 ThreadCritical::initialize();
5029
5030 main_thread = thr_self();
5031
5032 // Constant minimum stack size allowed. It must be at least
5033 // the minimum of what the OS supports (thr_min_stack()), and
5034 // enough to allow the thread to get to user bytecode execution.
5035 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed);
5036 // If the pagesize of the VM is greater than 8K determine the appropriate
5037 // number of initial guard pages. The user can change this with the
5038 // command line arguments, if needed.
5039 if (vm_page_size() > 8*K) {
5040 StackYellowPages = 1;
5041 StackRedPages = 1;
5042 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size();
5043 }
5044 }
5045
5046 // To install functions for atexit system call
5047 extern "C" {
5048 static void perfMemory_exit_helper() {
5049 perfMemory_exit();
5050 }
5051 }
5052
5053 // this is called _after_ the global arguments have been parsed
5054 jint os::init_2(void) {
5055 // try to enable extended file IO ASAP, see 6431278
5056 os::Solaris::try_enable_extended_io();
5057
5058 // Allocate a single page and mark it as readable for safepoint polling. Also
5059 // use this first mmap call to check support for MAP_ALIGN.
5060 address polling_page = (address)Solaris::mmap_chunk((char*)page_size,
5061 page_size,
5062 MAP_PRIVATE | MAP_ALIGN,
5063 PROT_READ);
5064 if (polling_page == NULL) {
5065 has_map_align = false;
5066 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE,
5067 PROT_READ);
5068 }
5069
5070 os::set_polling_page(polling_page);
5071
5072 #ifndef PRODUCT
5073 if( Verbose && PrintMiscellaneous )
5074 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
5075 #endif
5076
5077 if (!UseMembar) {
5078 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE );
5079 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page");
5080 os::set_memory_serialize_page( mem_serialize_page );
5081
5082 #ifndef PRODUCT
5083 if(Verbose && PrintMiscellaneous)
5084 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
5085 #endif
5086 }
5087
5088 os::large_page_init();
5089
5090 // Check minimum allowable stack size for thread creation and to initialize
5091 // the java system classes, including StackOverflowError - depends on page
5092 // size. Add a page for compiler2 recursion in main thread.
5093 // Add in 2*BytesPerWord times page size to account for VM stack during
5094 // class initialization depending on 32 or 64 bit VM.
5095 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed,
5096 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
5097 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size);
5098
5099 size_t threadStackSizeInBytes = ThreadStackSize * K;
5100 if (threadStackSizeInBytes != 0 &&
5101 threadStackSizeInBytes < os::Solaris::min_stack_allowed) {
5102 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk",
5103 os::Solaris::min_stack_allowed/K);
5104 return JNI_ERR;
5105 }
5106
5107 // For 64kbps there will be a 64kb page size, which makes
5108 // the usable default stack size quite a bit less. Increase the
5109 // stack for 64kb (or any > than 8kb) pages, this increases
5110 // virtual memory fragmentation (since we're not creating the
5111 // stack on a power of 2 boundary. The real fix for this
5112 // should be to fix the guard page mechanism.
5113
5114 if (vm_page_size() > 8*K) {
5115 threadStackSizeInBytes = (threadStackSizeInBytes != 0)
5116 ? threadStackSizeInBytes +
5117 ((StackYellowPages + StackRedPages) * vm_page_size())
5118 : 0;
5119 ThreadStackSize = threadStackSizeInBytes/K;
5120 }
5121
5122 // Make the stack size a multiple of the page size so that
5123 // the yellow/red zones can be guarded.
5124 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
5125 vm_page_size()));
5126
5127 Solaris::libthread_init();
5128
5129 if (UseNUMA) {
5130 if (!Solaris::liblgrp_init()) {
5131 UseNUMA = false;
5132 } else {
5133 size_t lgrp_limit = os::numa_get_groups_num();
5134 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
5135 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
5136 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal);
5137 if (lgrp_num < 2) {
5138 // There's only one locality group, disable NUMA.
5139 UseNUMA = false;
5140 }
5141 }
5142 // ISM is not compatible with the NUMA allocator - it always allocates
5143 // pages round-robin across the lgroups.
5144 if (UseNUMA && UseLargePages && UseISM) {
5145 if (!FLAG_IS_DEFAULT(UseNUMA)) {
5146 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) {
5147 UseLargePages = false;
5148 } else {
5149 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator");
5150 UseNUMA = false;
5151 }
5152 } else {
5153 UseNUMA = false;
5154 }
5155 }
5156 if (!UseNUMA && ForceNUMA) {
5157 UseNUMA = true;
5158 }
5159 }
5160
5161 Solaris::signal_sets_init();
5162 Solaris::init_signal_mem();
5163 Solaris::install_signal_handlers();
5164
5165 if (libjsigversion < JSIG_VERSION_1_4_1) {
5166 Maxlibjsigsigs = OLDMAXSIGNUM;
5167 }
5168
5169 // initialize synchronization primitives to use either thread or
5170 // lwp synchronization (controlled by UseLWPSynchronization)
5171 Solaris::synchronization_init();
5172
5173 if (MaxFDLimit) {
5174 // set the number of file descriptors to max. print out error
5175 // if getrlimit/setrlimit fails but continue regardless.
5176 struct rlimit nbr_files;
5177 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
5178 if (status != 0) {
5179 if (PrintMiscellaneous && (Verbose || WizardMode))
5180 perror("os::init_2 getrlimit failed");
5181 } else {
5182 nbr_files.rlim_cur = nbr_files.rlim_max;
5183 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
5184 if (status != 0) {
5185 if (PrintMiscellaneous && (Verbose || WizardMode))
5186 perror("os::init_2 setrlimit failed");
5187 }
5188 }
5189 }
5190
5191 // Calculate theoretical max. size of Threads to guard gainst
5192 // artifical out-of-memory situations, where all available address-
5193 // space has been reserved by thread stacks. Default stack size is 1Mb.
5194 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
5195 JavaThread::stack_size_at_create() : (1*K*K);
5196 assert(pre_thread_stack_size != 0, "Must have a stack");
5197 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
5198 // we should start doing Virtual Memory banging. Currently when the threads will
5199 // have used all but 200Mb of space.
5200 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
5201 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
5202
5203 // at-exit methods are called in the reverse order of their registration.
5204 // In Solaris 7 and earlier, atexit functions are called on return from
5205 // main or as a result of a call to exit(3C). There can be only 32 of
5206 // these functions registered and atexit() does not set errno. In Solaris
5207 // 8 and later, there is no limit to the number of functions registered
5208 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
5209 // functions are called upon dlclose(3DL) in addition to return from main
5210 // and exit(3C).
5211
5212 if (PerfAllowAtExitRegistration) {
5213 // only register atexit functions if PerfAllowAtExitRegistration is set.
5214 // atexit functions can be delayed until process exit time, which
5215 // can be problematic for embedded VM situations. Embedded VMs should
5216 // call DestroyJavaVM() to assure that VM resources are released.
5217
5218 // note: perfMemory_exit_helper atexit function may be removed in
5219 // the future if the appropriate cleanup code can be added to the
5220 // VM_Exit VMOperation's doit method.
5221 if (atexit(perfMemory_exit_helper) != 0) {
5222 warning("os::init2 atexit(perfMemory_exit_helper) failed");
5223 }
5224 }
5225
5226 // Init pset_loadavg function pointer
5227 init_pset_getloadavg_ptr();
5228
5229 return JNI_OK;
5230 }
5231
5232 void os::init_3(void) {
5233 return;
5234 }
5235
5236 // Mark the polling page as unreadable
5237 void os::make_polling_page_unreadable(void) {
5238 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 )
5239 fatal("Could not disable polling page");
5240 };
5241
5242 // Mark the polling page as readable
5243 void os::make_polling_page_readable(void) {
5244 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 )
5245 fatal("Could not enable polling page");
5246 };
5247
5248 // OS interface.
5249
5250 bool os::check_heap(bool force) { return true; }
5251
5252 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr);
5253 static vsnprintf_t sol_vsnprintf = NULL;
5254
5255 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) {
5256 if (!sol_vsnprintf) {
5257 //search for the named symbol in the objects that were loaded after libjvm
5258 void* where = RTLD_NEXT;
5259 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5260 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5261 if (!sol_vsnprintf){
5262 //search for the named symbol in the objects that were loaded before libjvm
5263 where = RTLD_DEFAULT;
5264 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL)
5265 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf"));
5266 assert(sol_vsnprintf != NULL, "vsnprintf not found");
5267 }
5268 }
5269 return (*sol_vsnprintf)(buf, count, fmt, argptr);
5270 }
5271
5272
5273 // Is a (classpath) directory empty?
5274 bool os::dir_is_empty(const char* path) {
5275 DIR *dir = NULL;
5276 struct dirent *ptr;
5277
5278 dir = opendir(path);
5279 if (dir == NULL) return true;
5280
5281 /* Scan the directory */
5282 bool result = true;
5283 char buf[sizeof(struct dirent) + MAX_PATH];
5284 struct dirent *dbuf = (struct dirent *) buf;
5285 while (result && (ptr = readdir(dir, dbuf)) != NULL) {
5286 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
5287 result = false;
5288 }
5289 }
5290 closedir(dir);
5291 return result;
5292 }
5293
5294 // This code originates from JDK's sysOpen and open64_w
5295 // from src/solaris/hpi/src/system_md.c
5296
5297 #ifndef O_DELETE
5298 #define O_DELETE 0x10000
5299 #endif
5300
5301 // Open a file. Unlink the file immediately after open returns
5302 // if the specified oflag has the O_DELETE flag set.
5303 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
5304
5305 int os::open(const char *path, int oflag, int mode) {
5306 if (strlen(path) > MAX_PATH - 1) {
5307 errno = ENAMETOOLONG;
5308 return -1;
5309 }
5310 int fd;
5311 int o_delete = (oflag & O_DELETE);
5312 oflag = oflag & ~O_DELETE;
5313
5314 fd = ::open64(path, oflag, mode);
5315 if (fd == -1) return -1;
5316
5317 //If the open succeeded, the file might still be a directory
5318 {
5319 struct stat64 buf64;
5320 int ret = ::fstat64(fd, &buf64);
5321 int st_mode = buf64.st_mode;
5322
5323 if (ret != -1) {
5324 if ((st_mode & S_IFMT) == S_IFDIR) {
5325 errno = EISDIR;
5326 ::close(fd);
5327 return -1;
5328 }
5329 } else {
5330 ::close(fd);
5331 return -1;
5332 }
5333 }
5334 /*
5335 * 32-bit Solaris systems suffer from:
5336 *
5337 * - an historical default soft limit of 256 per-process file
5338 * descriptors that is too low for many Java programs.
5339 *
5340 * - a design flaw where file descriptors created using stdio
5341 * fopen must be less than 256, _even_ when the first limit above
5342 * has been raised. This can cause calls to fopen (but not calls to
5343 * open, for example) to fail mysteriously, perhaps in 3rd party
5344 * native code (although the JDK itself uses fopen). One can hardly
5345 * criticize them for using this most standard of all functions.
5346 *
5347 * We attempt to make everything work anyways by:
5348 *
5349 * - raising the soft limit on per-process file descriptors beyond
5350 * 256
5351 *
5352 * - As of Solaris 10u4, we can request that Solaris raise the 256
5353 * stdio fopen limit by calling function enable_extended_FILE_stdio.
5354 * This is done in init_2 and recorded in enabled_extended_FILE_stdio
5355 *
5356 * - If we are stuck on an old (pre 10u4) Solaris system, we can
5357 * workaround the bug by remapping non-stdio file descriptors below
5358 * 256 to ones beyond 256, which is done below.
5359 *
5360 * See:
5361 * 1085341: 32-bit stdio routines should support file descriptors >255
5362 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files
5363 * 6431278: Netbeans crash on 32 bit Solaris: need to call
5364 * enable_extended_FILE_stdio() in VM initialisation
5365 * Giri Mandalika's blog
5366 * http://technopark02.blogspot.com/2005_05_01_archive.html
5367 */
5368 #ifndef _LP64
5369 if ((!enabled_extended_FILE_stdio) && fd < 256) {
5370 int newfd = ::fcntl(fd, F_DUPFD, 256);
5371 if (newfd != -1) {
5372 ::close(fd);
5373 fd = newfd;
5374 }
5375 }
5376 #endif // 32-bit Solaris
5377 /*
5378 * All file descriptors that are opened in the JVM and not
5379 * specifically destined for a subprocess should have the
5380 * close-on-exec flag set. If we don't set it, then careless 3rd
5381 * party native code might fork and exec without closing all
5382 * appropriate file descriptors (e.g. as we do in closeDescriptors in
5383 * UNIXProcess.c), and this in turn might:
5384 *
5385 * - cause end-of-file to fail to be detected on some file
5386 * descriptors, resulting in mysterious hangs, or
5387 *
5388 * - might cause an fopen in the subprocess to fail on a system
5389 * suffering from bug 1085341.
5390 *
5391 * (Yes, the default setting of the close-on-exec flag is a Unix
5392 * design flaw)
5393 *
5394 * See:
5395 * 1085341: 32-bit stdio routines should support file descriptors >255
5396 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
5397 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
5398 */
5399 #ifdef FD_CLOEXEC
5400 {
5401 int flags = ::fcntl(fd, F_GETFD);
5402 if (flags != -1)
5403 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
5404 }
5405 #endif
5406
5407 if (o_delete != 0) {
5408 ::unlink(path);
5409 }
5410 return fd;
5411 }
5412
5413 // create binary file, rewriting existing file if required
5414 int os::create_binary_file(const char* path, bool rewrite_existing) {
5415 int oflags = O_WRONLY | O_CREAT;
5416 if (!rewrite_existing) {
5417 oflags |= O_EXCL;
5418 }
5419 return ::open64(path, oflags, S_IREAD | S_IWRITE);
5420 }
5421
5422 // return current position of file pointer
5423 jlong os::current_file_offset(int fd) {
5424 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
5425 }
5426
5427 // move file pointer to the specified offset
5428 jlong os::seek_to_file_offset(int fd, jlong offset) {
5429 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
5430 }
5431
5432 jlong os::lseek(int fd, jlong offset, int whence) {
5433 return (jlong) ::lseek64(fd, offset, whence);
5434 }
5435
5436 char * os::native_path(char *path) {
5437 return path;
5438 }
5439
5440 int os::ftruncate(int fd, jlong length) {
5441 return ::ftruncate64(fd, length);
5442 }
5443
5444 int os::fsync(int fd) {
5445 RESTARTABLE_RETURN_INT(::fsync(fd));
5446 }
5447
5448 int os::available(int fd, jlong *bytes) {
5449 jlong cur, end;
5450 int mode;
5451 struct stat64 buf64;
5452
5453 if (::fstat64(fd, &buf64) >= 0) {
5454 mode = buf64.st_mode;
5455 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
5456 /*
5457 * XXX: is the following call interruptible? If so, this might
5458 * need to go through the INTERRUPT_IO() wrapper as for other
5459 * blocking, interruptible calls in this file.
5460 */
5461 int n,ioctl_return;
5462
5463 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted);
5464 if (ioctl_return>= 0) {
5465 *bytes = n;
5466 return 1;
5467 }
5468 }
5469 }
5470 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
5471 return 0;
5472 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
5473 return 0;
5474 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
5475 return 0;
5476 }
5477 *bytes = end - cur;
5478 return 1;
5479 }
5480
5481 // Map a block of memory.
5482 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
5483 char *addr, size_t bytes, bool read_only,
5484 bool allow_exec) {
5485 int prot;
5486 int flags;
5487
5488 if (read_only) {
5489 prot = PROT_READ;
5490 flags = MAP_SHARED;
5491 } else {
5492 prot = PROT_READ | PROT_WRITE;
5493 flags = MAP_PRIVATE;
5494 }
5495
5496 if (allow_exec) {
5497 prot |= PROT_EXEC;
5498 }
5499
5500 if (addr != NULL) {
5501 flags |= MAP_FIXED;
5502 }
5503
5504 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
5505 fd, file_offset);
5506 if (mapped_address == MAP_FAILED) {
5507 return NULL;
5508 }
5509 return mapped_address;
5510 }
5511
5512
5513 // Remap a block of memory.
5514 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
5515 char *addr, size_t bytes, bool read_only,
5516 bool allow_exec) {
5517 // same as map_memory() on this OS
5518 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
5519 allow_exec);
5520 }
5521
5522
5523 // Unmap a block of memory.
5524 bool os::pd_unmap_memory(char* addr, size_t bytes) {
5525 return munmap(addr, bytes) == 0;
5526 }
5527
5528 void os::pause() {
5529 char filename[MAX_PATH];
5530 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
5531 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
5532 } else {
5533 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
5534 }
5535
5536 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
5537 if (fd != -1) {
5538 struct stat buf;
5539 ::close(fd);
5540 while (::stat(filename, &buf) == 0) {
5541 (void)::poll(NULL, 0, 100);
5542 }
5543 } else {
5544 jio_fprintf(stderr,
5545 "Could not open pause file '%s', continuing immediately.\n", filename);
5546 }
5547 }
5548
5549 #ifndef PRODUCT
5550 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5551 // Turn this on if you need to trace synch operations.
5552 // Set RECORD_SYNCH_LIMIT to a large-enough value,
5553 // and call record_synch_enable and record_synch_disable
5554 // around the computation of interest.
5555
5556 void record_synch(char* name, bool returning); // defined below
5557
5558 class RecordSynch {
5559 char* _name;
5560 public:
5561 RecordSynch(char* name) :_name(name)
5562 { record_synch(_name, false); }
5563 ~RecordSynch() { record_synch(_name, true); }
5564 };
5565
5566 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
5567 extern "C" ret name params { \
5568 typedef ret name##_t params; \
5569 static name##_t* implem = NULL; \
5570 static int callcount = 0; \
5571 if (implem == NULL) { \
5572 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
5573 if (implem == NULL) fatal(dlerror()); \
5574 } \
5575 ++callcount; \
5576 RecordSynch _rs(#name); \
5577 inner; \
5578 return implem args; \
5579 }
5580 // in dbx, examine callcounts this way:
5581 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
5582
5583 #define CHECK_POINTER_OK(p) \
5584 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
5585 #define CHECK_MU \
5586 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
5587 #define CHECK_CV \
5588 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
5589 #define CHECK_P(p) \
5590 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
5591
5592 #define CHECK_MUTEX(mutex_op) \
5593 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
5594
5595 CHECK_MUTEX( mutex_lock)
5596 CHECK_MUTEX( _mutex_lock)
5597 CHECK_MUTEX( mutex_unlock)
5598 CHECK_MUTEX(_mutex_unlock)
5599 CHECK_MUTEX( mutex_trylock)
5600 CHECK_MUTEX(_mutex_trylock)
5601
5602 #define CHECK_COND(cond_op) \
5603 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV);
5604
5605 CHECK_COND( cond_wait);
5606 CHECK_COND(_cond_wait);
5607 CHECK_COND(_cond_wait_cancel);
5608
5609 #define CHECK_COND2(cond_op) \
5610 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV);
5611
5612 CHECK_COND2( cond_timedwait);
5613 CHECK_COND2(_cond_timedwait);
5614 CHECK_COND2(_cond_timedwait_cancel);
5615
5616 // do the _lwp_* versions too
5617 #define mutex_t lwp_mutex_t
5618 #define cond_t lwp_cond_t
5619 CHECK_MUTEX( _lwp_mutex_lock)
5620 CHECK_MUTEX( _lwp_mutex_unlock)
5621 CHECK_MUTEX( _lwp_mutex_trylock)
5622 CHECK_MUTEX( __lwp_mutex_lock)
5623 CHECK_MUTEX( __lwp_mutex_unlock)
5624 CHECK_MUTEX( __lwp_mutex_trylock)
5625 CHECK_MUTEX(___lwp_mutex_lock)
5626 CHECK_MUTEX(___lwp_mutex_unlock)
5627
5628 CHECK_COND( _lwp_cond_wait);
5629 CHECK_COND( __lwp_cond_wait);
5630 CHECK_COND(___lwp_cond_wait);
5631
5632 CHECK_COND2( _lwp_cond_timedwait);
5633 CHECK_COND2( __lwp_cond_timedwait);
5634 #undef mutex_t
5635 #undef cond_t
5636
5637 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5638 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
5639 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
5640 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
5641 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5642 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
5643 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5644 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
5645
5646
5647 // recording machinery:
5648
5649 enum { RECORD_SYNCH_LIMIT = 200 };
5650 char* record_synch_name[RECORD_SYNCH_LIMIT];
5651 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
5652 bool record_synch_returning[RECORD_SYNCH_LIMIT];
5653 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
5654 int record_synch_count = 0;
5655 bool record_synch_enabled = false;
5656
5657 // in dbx, examine recorded data this way:
5658 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
5659
5660 void record_synch(char* name, bool returning) {
5661 if (record_synch_enabled) {
5662 if (record_synch_count < RECORD_SYNCH_LIMIT) {
5663 record_synch_name[record_synch_count] = name;
5664 record_synch_returning[record_synch_count] = returning;
5665 record_synch_thread[record_synch_count] = thr_self();
5666 record_synch_arg0ptr[record_synch_count] = &name;
5667 record_synch_count++;
5668 }
5669 // put more checking code here:
5670 // ...
5671 }
5672 }
5673
5674 void record_synch_enable() {
5675 // start collecting trace data, if not already doing so
5676 if (!record_synch_enabled) record_synch_count = 0;
5677 record_synch_enabled = true;
5678 }
5679
5680 void record_synch_disable() {
5681 // stop collecting trace data
5682 record_synch_enabled = false;
5683 }
5684
5685 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
5686 #endif // PRODUCT
5687
5688 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5689 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
5690 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
5691
5692
5693 // JVMTI & JVM monitoring and management support
5694 // The thread_cpu_time() and current_thread_cpu_time() are only
5695 // supported if is_thread_cpu_time_supported() returns true.
5696 // They are not supported on Solaris T1.
5697
5698 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
5699 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
5700 // of a thread.
5701 //
5702 // current_thread_cpu_time() and thread_cpu_time(Thread *)
5703 // returns the fast estimate available on the platform.
5704
5705 // hrtime_t gethrvtime() return value includes
5706 // user time but does not include system time
5707 jlong os::current_thread_cpu_time() {
5708 return (jlong) gethrvtime();
5709 }
5710
5711 jlong os::thread_cpu_time(Thread *thread) {
5712 // return user level CPU time only to be consistent with
5713 // what current_thread_cpu_time returns.
5714 // thread_cpu_time_info() must be changed if this changes
5715 return os::thread_cpu_time(thread, false /* user time only */);
5716 }
5717
5718 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
5719 if (user_sys_cpu_time) {
5720 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
5721 } else {
5722 return os::current_thread_cpu_time();
5723 }
5724 }
5725
5726 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
5727 char proc_name[64];
5728 int count;
5729 prusage_t prusage;
5730 jlong lwp_time;
5731 int fd;
5732
5733 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
5734 getpid(),
5735 thread->osthread()->lwp_id());
5736 fd = ::open(proc_name, O_RDONLY);
5737 if ( fd == -1 ) return -1;
5738
5739 do {
5740 count = ::pread(fd,
5741 (void *)&prusage.pr_utime,
5742 thr_time_size,
5743 thr_time_off);
5744 } while (count < 0 && errno == EINTR);
5745 ::close(fd);
5746 if ( count < 0 ) return -1;
5747
5748 if (user_sys_cpu_time) {
5749 // user + system CPU time
5750 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
5751 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
5752 (jlong)prusage.pr_stime.tv_nsec +
5753 (jlong)prusage.pr_utime.tv_nsec;
5754 } else {
5755 // user level CPU time only
5756 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
5757 (jlong)prusage.pr_utime.tv_nsec;
5758 }
5759
5760 return(lwp_time);
5761 }
5762
5763 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5764 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5765 info_ptr->may_skip_backward = false; // elapsed time not wall time
5766 info_ptr->may_skip_forward = false; // elapsed time not wall time
5767 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5768 }
5769
5770 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
5771 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
5772 info_ptr->may_skip_backward = false; // elapsed time not wall time
5773 info_ptr->may_skip_forward = false; // elapsed time not wall time
5774 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
5775 }
5776
5777 bool os::is_thread_cpu_time_supported() {
5778 if ( os::Solaris::T2_libthread() || UseBoundThreads ) {
5779 return true;
5780 } else {
5781 return false;
5782 }
5783 }
5784
5785 // System loadavg support. Returns -1 if load average cannot be obtained.
5786 // Return the load average for our processor set if the primitive exists
5787 // (Solaris 9 and later). Otherwise just return system wide loadavg.
5788 int os::loadavg(double loadavg[], int nelem) {
5789 if (pset_getloadavg_ptr != NULL) {
5790 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
5791 } else {
5792 return ::getloadavg(loadavg, nelem);
5793 }
5794 }
5795
5796 //---------------------------------------------------------------------------------
5797
5798 static address same_page(address x, address y) {
5799 intptr_t page_bits = -os::vm_page_size();
5800 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
5801 return x;
5802 else if (x > y)
5803 return (address)(intptr_t(y) | ~page_bits) + 1;
5804 else
5805 return (address)(intptr_t(y) & page_bits);
5806 }
5807
5808 bool os::find(address addr, outputStream* st) {
5809 Dl_info dlinfo;
5810 memset(&dlinfo, 0, sizeof(dlinfo));
5811 if (dladdr(addr, &dlinfo)) {
5812 #ifdef _LP64
5813 st->print("0x%016lx: ", addr);
5814 #else
5815 st->print("0x%08x: ", addr);
5816 #endif
5817 if (dlinfo.dli_sname != NULL)
5818 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
5819 else if (dlinfo.dli_fname)
5820 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
5821 else
5822 st->print("<absolute address>");
5823 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname);
5824 #ifdef _LP64
5825 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase);
5826 #else
5827 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase);
5828 #endif
5829 st->cr();
5830
5831 if (Verbose) {
5832 // decode some bytes around the PC
5833 address begin = same_page(addr-40, addr);
5834 address end = same_page(addr+40, addr);
5835 address lowest = (address) dlinfo.dli_sname;
5836 if (!lowest) lowest = (address) dlinfo.dli_fbase;
5837 if (begin < lowest) begin = lowest;
5838 Dl_info dlinfo2;
5839 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr
5840 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
5841 end = (address) dlinfo2.dli_saddr;
5842 Disassembler::decode(begin, end, st);
5843 }
5844 return true;
5845 }
5846 return false;
5847 }
5848
5849 // Following function has been added to support HotSparc's libjvm.so running
5850 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
5851 // src/solaris/hpi/native_threads in the EVM codebase.
5852 //
5853 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
5854 // libraries and should thus be removed. We will leave it behind for a while
5855 // until we no longer want to able to run on top of 1.3.0 Solaris production
5856 // JDK. See 4341971.
5857
5858 #define STACK_SLACK 0x800
5859
5860 extern "C" {
5861 intptr_t sysThreadAvailableStackWithSlack() {
5862 stack_t st;
5863 intptr_t retval, stack_top;
5864 retval = thr_stksegment(&st);
5865 assert(retval == 0, "incorrect return value from thr_stksegment");
5866 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
5867 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
5868 stack_top=(intptr_t)st.ss_sp-st.ss_size;
5869 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
5870 }
5871 }
5872
5873 // Just to get the Kernel build to link on solaris for testing.
5874
5875 extern "C" {
5876 class ASGCT_CallTrace;
5877 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext)
5878 KERNEL_RETURN;
5879 }
5880
5881
5882 // ObjectMonitor park-unpark infrastructure ...
5883 //
5884 // We implement Solaris and Linux PlatformEvents with the
5885 // obvious condvar-mutex-flag triple.
5886 // Another alternative that works quite well is pipes:
5887 // Each PlatformEvent consists of a pipe-pair.
5888 // The thread associated with the PlatformEvent
5889 // calls park(), which reads from the input end of the pipe.
5890 // Unpark() writes into the other end of the pipe.
5891 // The write-side of the pipe must be set NDELAY.
5892 // Unfortunately pipes consume a large # of handles.
5893 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
5894 // Using pipes for the 1st few threads might be workable, however.
5895 //
5896 // park() is permitted to return spuriously.
5897 // Callers of park() should wrap the call to park() in
5898 // an appropriate loop. A litmus test for the correct
5899 // usage of park is the following: if park() were modified
5900 // to immediately return 0 your code should still work,
5901 // albeit degenerating to a spin loop.
5902 //
5903 // An interesting optimization for park() is to use a trylock()
5904 // to attempt to acquire the mutex. If the trylock() fails
5905 // then we know that a concurrent unpark() operation is in-progress.
5906 // in that case the park() code could simply set _count to 0
5907 // and return immediately. The subsequent park() operation *might*
5908 // return immediately. That's harmless as the caller of park() is
5909 // expected to loop. By using trylock() we will have avoided a
5910 // avoided a context switch caused by contention on the per-thread mutex.
5911 //
5912 // TODO-FIXME:
5913 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the
5914 // objectmonitor implementation.
5915 // 2. Collapse the JSR166 parker event, and the
5916 // objectmonitor ParkEvent into a single "Event" construct.
5917 // 3. In park() and unpark() add:
5918 // assert (Thread::current() == AssociatedWith).
5919 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch.
5920 // 1-out-of-N park() operations will return immediately.
5921 //
5922 // _Event transitions in park()
5923 // -1 => -1 : illegal
5924 // 1 => 0 : pass - return immediately
5925 // 0 => -1 : block
5926 //
5927 // _Event serves as a restricted-range semaphore.
5928 //
5929 // Another possible encoding of _Event would be with
5930 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
5931 //
5932 // TODO-FIXME: add DTRACE probes for:
5933 // 1. Tx parks
5934 // 2. Ty unparks Tx
5935 // 3. Tx resumes from park
5936
5937
5938 // value determined through experimentation
5939 #define ROUNDINGFIX 11
5940
5941 // utility to compute the abstime argument to timedwait.
5942 // TODO-FIXME: switch from compute_abstime() to unpackTime().
5943
5944 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
5945 // millis is the relative timeout time
5946 // abstime will be the absolute timeout time
5947 if (millis < 0) millis = 0;
5948 struct timeval now;
5949 int status = gettimeofday(&now, NULL);
5950 assert(status == 0, "gettimeofday");
5951 jlong seconds = millis / 1000;
5952 jlong max_wait_period;
5953
5954 if (UseLWPSynchronization) {
5955 // forward port of fix for 4275818 (not sleeping long enough)
5956 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
5957 // _lwp_cond_timedwait() used a round_down algorithm rather
5958 // than a round_up. For millis less than our roundfactor
5959 // it rounded down to 0 which doesn't meet the spec.
5960 // For millis > roundfactor we may return a bit sooner, but
5961 // since we can not accurately identify the patch level and
5962 // this has already been fixed in Solaris 9 and 8 we will
5963 // leave it alone rather than always rounding down.
5964
5965 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
5966 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
5967 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
5968 max_wait_period = 21000000;
5969 } else {
5970 max_wait_period = 50000000;
5971 }
5972 millis %= 1000;
5973 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
5974 seconds = max_wait_period;
5975 }
5976 abstime->tv_sec = now.tv_sec + seconds;
5977 long usec = now.tv_usec + millis * 1000;
5978 if (usec >= 1000000) {
5979 abstime->tv_sec += 1;
5980 usec -= 1000000;
5981 }
5982 abstime->tv_nsec = usec * 1000;
5983 return abstime;
5984 }
5985
5986 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
5987 // Conceptually TryPark() should be equivalent to park(0).
5988
5989 int os::PlatformEvent::TryPark() {
5990 for (;;) {
5991 const int v = _Event ;
5992 guarantee ((v == 0) || (v == 1), "invariant") ;
5993 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ;
5994 }
5995 }
5996
5997 void os::PlatformEvent::park() { // AKA: down()
5998 // Invariant: Only the thread associated with the Event/PlatformEvent
5999 // may call park().
6000 int v ;
6001 for (;;) {
6002 v = _Event ;
6003 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
6004 }
6005 guarantee (v >= 0, "invariant") ;
6006 if (v == 0) {
6007 // Do this the hard way by blocking ...
6008 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6009 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6010 // Only for SPARC >= V8PlusA
6011 #if defined(__sparc) && defined(COMPILER2)
6012 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6013 #endif
6014 int status = os::Solaris::mutex_lock(_mutex);
6015 assert_status(status == 0, status, "mutex_lock");
6016 guarantee (_nParked == 0, "invariant") ;
6017 ++ _nParked ;
6018 while (_Event < 0) {
6019 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
6020 // Treat this the same as if the wait was interrupted
6021 // With usr/lib/lwp going to kernel, always handle ETIME
6022 status = os::Solaris::cond_wait(_cond, _mutex);
6023 if (status == ETIME) status = EINTR ;
6024 assert_status(status == 0 || status == EINTR, status, "cond_wait");
6025 }
6026 -- _nParked ;
6027 _Event = 0 ;
6028 status = os::Solaris::mutex_unlock(_mutex);
6029 assert_status(status == 0, status, "mutex_unlock");
6030 }
6031 }
6032
6033 int os::PlatformEvent::park(jlong millis) {
6034 guarantee (_nParked == 0, "invariant") ;
6035 int v ;
6036 for (;;) {
6037 v = _Event ;
6038 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
6039 }
6040 guarantee (v >= 0, "invariant") ;
6041 if (v != 0) return OS_OK ;
6042
6043 int ret = OS_TIMEOUT;
6044 timestruc_t abst;
6045 compute_abstime (&abst, millis);
6046
6047 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6048 // For Solaris SPARC set fprs.FEF=0 prior to parking.
6049 // Only for SPARC >= V8PlusA
6050 #if defined(__sparc) && defined(COMPILER2)
6051 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6052 #endif
6053 int status = os::Solaris::mutex_lock(_mutex);
6054 assert_status(status == 0, status, "mutex_lock");
6055 guarantee (_nParked == 0, "invariant") ;
6056 ++ _nParked ;
6057 while (_Event < 0) {
6058 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
6059 assert_status(status == 0 || status == EINTR ||
6060 status == ETIME || status == ETIMEDOUT,
6061 status, "cond_timedwait");
6062 if (!FilterSpuriousWakeups) break ; // previous semantics
6063 if (status == ETIME || status == ETIMEDOUT) break ;
6064 // We consume and ignore EINTR and spurious wakeups.
6065 }
6066 -- _nParked ;
6067 if (_Event >= 0) ret = OS_OK ;
6068 _Event = 0 ;
6069 status = os::Solaris::mutex_unlock(_mutex);
6070 assert_status(status == 0, status, "mutex_unlock");
6071 return ret;
6072 }
6073
6074 void os::PlatformEvent::unpark() {
6075 int v, AnyWaiters;
6076
6077 // Increment _Event.
6078 // Another acceptable implementation would be to simply swap 1
6079 // into _Event:
6080 // if (Swap (&_Event, 1) < 0) {
6081 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ;
6082 // if (AnyWaiters) cond_signal (_cond) ;
6083 // }
6084
6085 for (;;) {
6086 v = _Event ;
6087 if (v > 0) {
6088 // The LD of _Event could have reordered or be satisfied
6089 // by a read-aside from this processor's write buffer.
6090 // To avoid problems execute a barrier and then
6091 // ratify the value. A degenerate CAS() would also work.
6092 // Viz., CAS (v+0, &_Event, v) == v).
6093 OrderAccess::fence() ;
6094 if (_Event == v) return ;
6095 continue ;
6096 }
6097 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
6098 }
6099
6100 // If the thread associated with the event was parked, wake it.
6101 if (v < 0) {
6102 int status ;
6103 // Wait for the thread assoc with the PlatformEvent to vacate.
6104 status = os::Solaris::mutex_lock(_mutex);
6105 assert_status(status == 0, status, "mutex_lock");
6106 AnyWaiters = _nParked ;
6107 status = os::Solaris::mutex_unlock(_mutex);
6108 assert_status(status == 0, status, "mutex_unlock");
6109 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ;
6110 if (AnyWaiters != 0) {
6111 // We intentional signal *after* dropping the lock
6112 // to avoid a common class of futile wakeups.
6113 status = os::Solaris::cond_signal(_cond);
6114 assert_status(status == 0, status, "cond_signal");
6115 }
6116 }
6117 }
6118
6119 // JSR166
6120 // -------------------------------------------------------
6121
6122 /*
6123 * The solaris and linux implementations of park/unpark are fairly
6124 * conservative for now, but can be improved. They currently use a
6125 * mutex/condvar pair, plus _counter.
6126 * Park decrements _counter if > 0, else does a condvar wait. Unpark
6127 * sets count to 1 and signals condvar. Only one thread ever waits
6128 * on the condvar. Contention seen when trying to park implies that someone
6129 * is unparking you, so don't wait. And spurious returns are fine, so there
6130 * is no need to track notifications.
6131 */
6132
6133 #define MAX_SECS 100000000
6134 /*
6135 * This code is common to linux and solaris and will be moved to a
6136 * common place in dolphin.
6137 *
6138 * The passed in time value is either a relative time in nanoseconds
6139 * or an absolute time in milliseconds. Either way it has to be unpacked
6140 * into suitable seconds and nanoseconds components and stored in the
6141 * given timespec structure.
6142 * Given time is a 64-bit value and the time_t used in the timespec is only
6143 * a signed-32-bit value (except on 64-bit Linux) we have to watch for
6144 * overflow if times way in the future are given. Further on Solaris versions
6145 * prior to 10 there is a restriction (see cond_timedwait) that the specified
6146 * number of seconds, in abstime, is less than current_time + 100,000,000.
6147 * As it will be 28 years before "now + 100000000" will overflow we can
6148 * ignore overflow and just impose a hard-limit on seconds using the value
6149 * of "now + 100,000,000". This places a limit on the timeout of about 3.17
6150 * years from "now".
6151 */
6152 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
6153 assert (time > 0, "convertTime");
6154
6155 struct timeval now;
6156 int status = gettimeofday(&now, NULL);
6157 assert(status == 0, "gettimeofday");
6158
6159 time_t max_secs = now.tv_sec + MAX_SECS;
6160
6161 if (isAbsolute) {
6162 jlong secs = time / 1000;
6163 if (secs > max_secs) {
6164 absTime->tv_sec = max_secs;
6165 }
6166 else {
6167 absTime->tv_sec = secs;
6168 }
6169 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
6170 }
6171 else {
6172 jlong secs = time / NANOSECS_PER_SEC;
6173 if (secs >= MAX_SECS) {
6174 absTime->tv_sec = max_secs;
6175 absTime->tv_nsec = 0;
6176 }
6177 else {
6178 absTime->tv_sec = now.tv_sec + secs;
6179 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
6180 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
6181 absTime->tv_nsec -= NANOSECS_PER_SEC;
6182 ++absTime->tv_sec; // note: this must be <= max_secs
6183 }
6184 }
6185 }
6186 assert(absTime->tv_sec >= 0, "tv_sec < 0");
6187 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
6188 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
6189 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
6190 }
6191
6192 void Parker::park(bool isAbsolute, jlong time) {
6193
6194 // Optional fast-path check:
6195 // Return immediately if a permit is available.
6196 if (_counter > 0) {
6197 _counter = 0 ;
6198 OrderAccess::fence();
6199 return ;
6200 }
6201
6202 // Optional fast-exit: Check interrupt before trying to wait
6203 Thread* thread = Thread::current();
6204 assert(thread->is_Java_thread(), "Must be JavaThread");
6205 JavaThread *jt = (JavaThread *)thread;
6206 if (Thread::is_interrupted(thread, false)) {
6207 return;
6208 }
6209
6210 // First, demultiplex/decode time arguments
6211 timespec absTime;
6212 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
6213 return;
6214 }
6215 if (time > 0) {
6216 // Warning: this code might be exposed to the old Solaris time
6217 // round-down bugs. Grep "roundingFix" for details.
6218 unpackTime(&absTime, isAbsolute, time);
6219 }
6220
6221 // Enter safepoint region
6222 // Beware of deadlocks such as 6317397.
6223 // The per-thread Parker:: _mutex is a classic leaf-lock.
6224 // In particular a thread must never block on the Threads_lock while
6225 // holding the Parker:: mutex. If safepoints are pending both the
6226 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
6227 ThreadBlockInVM tbivm(jt);
6228
6229 // Don't wait if cannot get lock since interference arises from
6230 // unblocking. Also. check interrupt before trying wait
6231 if (Thread::is_interrupted(thread, false) ||
6232 os::Solaris::mutex_trylock(_mutex) != 0) {
6233 return;
6234 }
6235
6236 int status ;
6237
6238 if (_counter > 0) { // no wait needed
6239 _counter = 0;
6240 status = os::Solaris::mutex_unlock(_mutex);
6241 assert (status == 0, "invariant") ;
6242 OrderAccess::fence();
6243 return;
6244 }
6245
6246 #ifdef ASSERT
6247 // Don't catch signals while blocked; let the running threads have the signals.
6248 // (This allows a debugger to break into the running thread.)
6249 sigset_t oldsigs;
6250 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals();
6251 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
6252 #endif
6253
6254 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
6255 jt->set_suspend_equivalent();
6256 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
6257
6258 // Do this the hard way by blocking ...
6259 // See http://monaco.sfbay/detail.jsf?cr=5094058.
6260 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking.
6261 // Only for SPARC >= V8PlusA
6262 #if defined(__sparc) && defined(COMPILER2)
6263 if (ClearFPUAtPark) { _mark_fpu_nosave() ; }
6264 #endif
6265
6266 if (time == 0) {
6267 status = os::Solaris::cond_wait (_cond, _mutex) ;
6268 } else {
6269 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
6270 }
6271 // Note that an untimed cond_wait() can sometimes return ETIME on older
6272 // versions of the Solaris.
6273 assert_status(status == 0 || status == EINTR ||
6274 status == ETIME || status == ETIMEDOUT,
6275 status, "cond_timedwait");
6276
6277 #ifdef ASSERT
6278 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL);
6279 #endif
6280 _counter = 0 ;
6281 status = os::Solaris::mutex_unlock(_mutex);
6282 assert_status(status == 0, status, "mutex_unlock") ;
6283
6284 // If externally suspended while waiting, re-suspend
6285 if (jt->handle_special_suspend_equivalent_condition()) {
6286 jt->java_suspend_self();
6287 }
6288 OrderAccess::fence();
6289 }
6290
6291 void Parker::unpark() {
6292 int s, status ;
6293 status = os::Solaris::mutex_lock (_mutex) ;
6294 assert (status == 0, "invariant") ;
6295 s = _counter;
6296 _counter = 1;
6297 status = os::Solaris::mutex_unlock (_mutex) ;
6298 assert (status == 0, "invariant") ;
6299
6300 if (s < 1) {
6301 status = os::Solaris::cond_signal (_cond) ;
6302 assert (status == 0, "invariant") ;
6303 }
6304 }
6305
6306 extern char** environ;
6307
6308 // Run the specified command in a separate process. Return its exit value,
6309 // or -1 on failure (e.g. can't fork a new process).
6310 // Unlike system(), this function can be called from signal handler. It
6311 // doesn't block SIGINT et al.
6312 int os::fork_and_exec(char* cmd) {
6313 char * argv[4];
6314 argv[0] = (char *)"sh";
6315 argv[1] = (char *)"-c";
6316 argv[2] = cmd;
6317 argv[3] = NULL;
6318
6319 // fork is async-safe, fork1 is not so can't use in signal handler
6320 pid_t pid;
6321 Thread* t = ThreadLocalStorage::get_thread_slow();
6322 if (t != NULL && t->is_inside_signal_handler()) {
6323 pid = fork();
6324 } else {
6325 pid = fork1();
6326 }
6327
6328 if (pid < 0) {
6329 // fork failed
6330 warning("fork failed: %s", strerror(errno));
6331 return -1;
6332
6333 } else if (pid == 0) {
6334 // child process
6335
6336 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
6337 execve("/usr/bin/sh", argv, environ);
6338
6339 // execve failed
6340 _exit(-1);
6341
6342 } else {
6343 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
6344 // care about the actual exit code, for now.
6345
6346 int status;
6347
6348 // Wait for the child process to exit. This returns immediately if
6349 // the child has already exited. */
6350 while (waitpid(pid, &status, 0) < 0) {
6351 switch (errno) {
6352 case ECHILD: return 0;
6353 case EINTR: break;
6354 default: return -1;
6355 }
6356 }
6357
6358 if (WIFEXITED(status)) {
6359 // The child exited normally; get its exit code.
6360 return WEXITSTATUS(status);
6361 } else if (WIFSIGNALED(status)) {
6362 // The child exited because of a signal
6363 // The best value to return is 0x80 + signal number,
6364 // because that is what all Unix shells do, and because
6365 // it allows callers to distinguish between process exit and
6366 // process death by signal.
6367 return 0x80 + WTERMSIG(status);
6368 } else {
6369 // Unknown exit code; pass it through
6370 return status;
6371 }
6372 }
6373 }
6374
6375 // is_headless_jre()
6376 //
6377 // Test for the existence of xawt/libmawt.so or libawt_xawt.so
6378 // in order to report if we are running in a headless jre
6379 //
6380 // Since JDK8 xawt/libmawt.so was moved into the same directory
6381 // as libawt.so, and renamed libawt_xawt.so
6382 //
6383 bool os::is_headless_jre() {
6384 struct stat statbuf;
6385 char buf[MAXPATHLEN];
6386 char libmawtpath[MAXPATHLEN];
6387 const char *xawtstr = "/xawt/libmawt.so";
6388 const char *new_xawtstr = "/libawt_xawt.so";
6389 char *p;
6390
6391 // Get path to libjvm.so
6392 os::jvm_path(buf, sizeof(buf));
6393
6394 // Get rid of libjvm.so
6395 p = strrchr(buf, '/');
6396 if (p == NULL) return false;
6397 else *p = '\0';
6398
6399 // Get rid of client or server
6400 p = strrchr(buf, '/');
6401 if (p == NULL) return false;
6402 else *p = '\0';
6403
6404 // check xawt/libmawt.so
6405 strcpy(libmawtpath, buf);
6406 strcat(libmawtpath, xawtstr);
6407 if (::stat(libmawtpath, &statbuf) == 0) return false;
6408
6409 // check libawt_xawt.so
6410 strcpy(libmawtpath, buf);
6411 strcat(libmawtpath, new_xawtstr);
6412 if (::stat(libmawtpath, &statbuf) == 0) return false;
6413
6414 return true;
6415 }
6416
6417 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
6418 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted);
6419 }
6420
6421 int os::close(int fd) {
6422 RESTARTABLE_RETURN_INT(::close(fd));
6423 }
6424
6425 int os::socket_close(int fd) {
6426 RESTARTABLE_RETURN_INT(::close(fd));
6427 }
6428
6429 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
6430 INTERRUPTIBLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6431 }
6432
6433 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
6434 INTERRUPTIBLE_RETURN_INT((int)::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted);
6435 }
6436
6437 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
6438 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
6439 }
6440
6441 // As both poll and select can be interrupted by signals, we have to be
6442 // prepared to restart the system call after updating the timeout, unless
6443 // a poll() is done with timeout == -1, in which case we repeat with this
6444 // "wait forever" value.
6445
6446 int os::timeout(int fd, long timeout) {
6447 int res;
6448 struct timeval t;
6449 julong prevtime, newtime;
6450 static const char* aNull = 0;
6451 struct pollfd pfd;
6452 pfd.fd = fd;
6453 pfd.events = POLLIN;
6454
6455 gettimeofday(&t, &aNull);
6456 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
6457
6458 for(;;) {
6459 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted);
6460 if(res == OS_ERR && errno == EINTR) {
6461 if(timeout != -1) {
6462 gettimeofday(&t, &aNull);
6463 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000;
6464 timeout -= newtime - prevtime;
6465 if(timeout <= 0)
6466 return OS_OK;
6467 prevtime = newtime;
6468 }
6469 } else return res;
6470 }
6471 }
6472
6473 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
6474 int _result;
6475 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,\
6476 os::Solaris::clear_interrupted);
6477
6478 // Depending on when thread interruption is reset, _result could be
6479 // one of two values when errno == EINTR
6480
6481 if (((_result == OS_INTRPT) || (_result == OS_ERR))
6482 && (errno == EINTR)) {
6483 /* restarting a connect() changes its errno semantics */
6484 INTERRUPTIBLE(::connect(fd, him, len), _result,\
6485 os::Solaris::clear_interrupted);
6486 /* undo these changes */
6487 if (_result == OS_ERR) {
6488 if (errno == EALREADY) {
6489 errno = EINPROGRESS; /* fall through */
6490 } else if (errno == EISCONN) {
6491 errno = 0;
6492 return OS_OK;
6493 }
6494 }
6495 }
6496 return _result;
6497 }
6498
6499 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
6500 if (fd < 0) {
6501 return OS_ERR;
6502 }
6503 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, len),\
6504 os::Solaris::clear_interrupted);
6505 }
6506
6507 int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
6508 sockaddr* from, socklen_t* fromlen) {
6509 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen),\
6510 os::Solaris::clear_interrupted);
6511 }
6512
6513 int os::sendto(int fd, char* buf, size_t len, uint flags,
6514 struct sockaddr* to, socklen_t tolen) {
6515 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen),\
6516 os::Solaris::clear_interrupted);
6517 }
6518
6519 int os::socket_available(int fd, jint *pbytes) {
6520 if (fd < 0) {
6521 return OS_OK;
6522 }
6523 int ret;
6524 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret);
6525 // note: ioctl can return 0 when successful, JVM_SocketAvailable
6526 // is expected to return 0 on failure and 1 on success to the jdk.
6527 return (ret == OS_ERR) ? 0 : 1;
6528 }
6529
6530 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
6531 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\
6532 os::Solaris::clear_interrupted);
6533 }
6534
6535 // Get the default path to the core file
6536 // Returns the length of the string
6537 int os::get_core_path(char* buffer, size_t bufferSize) {
6538 const char* p = get_current_directory(buffer, bufferSize);
6539
6540 if (p == NULL) {
6541 assert(p != NULL, "failed to get current directory");
6542 return 0;
6543 }
6544
6545 return strlen(buffer);
6546 }