1 /*
2 * Copyright (c) 1997, 2018, 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 "jvm.h"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/icBuffer.hpp"
31 #include "code/vtableStubs.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "compiler/disassembler.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logStream.hpp"
37 #include "memory/allocation.inline.hpp"
38 #include "memory/filemap.hpp"
39 #include "oops/oop.inline.hpp"
40 #include "os_share_solaris.hpp"
41 #include "os_solaris.inline.hpp"
42 #include "prims/jniFastGetField.hpp"
43 #include "prims/jvm_misc.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/atomic.hpp"
46 #include "runtime/extendedPC.hpp"
47 #include "runtime/globals.hpp"
48 #include "runtime/interfaceSupport.inline.hpp"
49 #include "runtime/java.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/mutexLocker.hpp"
52 #include "runtime/objectMonitor.hpp"
53 #include "runtime/orderAccess.hpp"
54 #include "runtime/osThread.hpp"
55 #include "runtime/perfMemory.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "runtime/statSampler.hpp"
58 #include "runtime/stubRoutines.hpp"
59 #include "runtime/thread.inline.hpp"
60 #include "runtime/threadCritical.hpp"
61 #include "runtime/timer.hpp"
62 #include "runtime/vm_version.hpp"
63 #include "semaphore_posix.hpp"
64 #include "services/attachListener.hpp"
65 #include "services/memTracker.hpp"
66 #include "services/runtimeService.hpp"
67 #include "utilities/align.hpp"
68 #include "utilities/decoder.hpp"
69 #include "utilities/defaultStream.hpp"
70 #include "utilities/events.hpp"
71 #include "utilities/growableArray.hpp"
72 #include "utilities/macros.hpp"
73 #include "utilities/vmError.hpp"
74
75 // put OS-includes here
76 # include <dlfcn.h>
77 # include <errno.h>
78 # include <exception>
79 # include <link.h>
80 # include <poll.h>
81 # include <pthread.h>
82 # include <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
125 // Here are some liblgrp types from sys/lgrp_user.h to be able to
126 // compile on older systems without this header file.
127
128 #ifndef MADV_ACCESS_LWP
129 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */
130 #endif
131 #ifndef MADV_ACCESS_MANY
132 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */
133 #endif
134
135 #ifndef LGRP_RSRC_CPU
136 #define LGRP_RSRC_CPU 0 /* CPU resources */
137 #endif
138 #ifndef LGRP_RSRC_MEM
139 #define LGRP_RSRC_MEM 1 /* memory resources */
140 #endif
141
142 // Values for ThreadPriorityPolicy == 1
143 int prio_policy1[CriticalPriority+1] = {
144 -99999, 0, 16, 32, 48, 64,
145 80, 96, 112, 124, 127, 127 };
146
147 // System parameters used internally
148 static clock_t clock_tics_per_sec = 100;
149
150 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+)
151 static bool enabled_extended_FILE_stdio = false;
152
153 // For diagnostics to print a message once. see run_periodic_checks
154 static bool check_addr0_done = false;
155 static sigset_t check_signal_done;
156 static bool check_signals = true;
157
158 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo
159 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo
160
161 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround
162
163 os::Solaris::pthread_setname_np_func_t os::Solaris::_pthread_setname_np = NULL;
164
165 // "default" initializers for missing libc APIs
166 extern "C" {
167 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
168 static int lwp_mutex_destroy(mutex_t *mx) { return 0; }
169
170 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
171 static int lwp_cond_destroy(cond_t *cv) { return 0; }
172 }
173
174 // "default" initializers for pthread-based synchronization
175 extern "C" {
176 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; }
177 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; }
178 }
179
180 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time);
181
182 static inline size_t adjust_stack_size(address base, size_t size) {
183 if ((ssize_t)size < 0) {
184 // 4759953: Compensate for ridiculous stack size.
185 size = max_intx;
186 }
187 if (size > (size_t)base) {
188 // 4812466: Make sure size doesn't allow the stack to wrap the address space.
189 size = (size_t)base;
190 }
191 return size;
192 }
193
194 static inline stack_t get_stack_info() {
195 stack_t st;
196 int retval = thr_stksegment(&st);
197 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size);
198 assert(retval == 0, "incorrect return value from thr_stksegment");
199 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
200 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
201 return st;
202 }
203
204 static void _handle_uncaught_cxx_exception() {
205 VMError::report_and_die("An uncaught C++ exception");
206 }
207
208 bool os::is_primordial_thread(void) {
209 int r = thr_main();
210 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689");
211 return r == 1;
212 }
213
214 address os::current_stack_base() {
215 bool _is_primordial_thread = is_primordial_thread();
216
217 // Workaround 4352906, avoid calls to thr_stksegment by
218 // thr_main after the first one (it looks like we trash
219 // some data, causing the value for ss_sp to be incorrect).
220 if (!_is_primordial_thread || os::Solaris::_main_stack_base == NULL) {
221 stack_t st = get_stack_info();
222 if (_is_primordial_thread) {
223 // cache initial value of stack base
224 os::Solaris::_main_stack_base = (address)st.ss_sp;
225 }
226 return (address)st.ss_sp;
227 } else {
228 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base");
229 return os::Solaris::_main_stack_base;
230 }
231 }
232
233 size_t os::current_stack_size() {
234 size_t size;
235
236 if (!is_primordial_thread()) {
237 size = get_stack_info().ss_size;
238 } else {
239 struct rlimit limits;
240 getrlimit(RLIMIT_STACK, &limits);
241 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur);
242 }
243 // base may not be page aligned
244 address base = current_stack_base();
245 address bottom = align_up(base - size, os::vm_page_size());;
246 return (size_t)(base - bottom);
247 }
248
249 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
250 return localtime_r(clock, res);
251 }
252
253 void os::Solaris::try_enable_extended_io() {
254 typedef int (*enable_extended_FILE_stdio_t)(int, int);
255
256 if (!UseExtendedFileIO) {
257 return;
258 }
259
260 enable_extended_FILE_stdio_t enabler =
261 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT,
262 "enable_extended_FILE_stdio");
263 if (enabler) {
264 enabler(-1, -1);
265 }
266 }
267
268 static int _processors_online = 0;
269
270 jint os::Solaris::_os_thread_limit = 0;
271 volatile jint os::Solaris::_os_thread_count = 0;
272
273 julong os::available_memory() {
274 return Solaris::available_memory();
275 }
276
277 julong os::Solaris::available_memory() {
278 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size();
279 }
280
281 julong os::Solaris::_physical_memory = 0;
282
283 julong os::physical_memory() {
284 return Solaris::physical_memory();
285 }
286
287 static hrtime_t first_hrtime = 0;
288 static const hrtime_t hrtime_hz = 1000*1000*1000;
289 static volatile hrtime_t max_hrtime = 0;
290
291
292 void os::Solaris::initialize_system_info() {
293 set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
294 _processors_online = sysconf(_SC_NPROCESSORS_ONLN);
295 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) *
296 (julong)sysconf(_SC_PAGESIZE);
297 }
298
299 uint os::processor_id() {
300 const processorid_t id = ::getcpuid();
301 assert(id >= 0 && id < _processor_count, "Invalid processor id");
302 return (uint)id;
303 }
304
305 int os::active_processor_count() {
306 // User has overridden the number of active processors
307 if (ActiveProcessorCount > 0) {
308 log_trace(os)("active_processor_count: "
309 "active processor count set by user : %d",
310 ActiveProcessorCount);
311 return ActiveProcessorCount;
312 }
313
314 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
315 pid_t pid = getpid();
316 psetid_t pset = PS_NONE;
317 // Are we running in a processor set or is there any processor set around?
318 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) {
319 uint_t pset_cpus;
320 // Query the number of cpus available to us.
321 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) {
322 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check");
323 _processors_online = pset_cpus;
324 return pset_cpus;
325 }
326 }
327 // Otherwise return number of online cpus
328 return online_cpus;
329 }
330
331 static bool find_processors_in_pset(psetid_t pset,
332 processorid_t** id_array,
333 uint_t* id_length) {
334 bool result = false;
335 // Find the number of processors in the processor set.
336 if (pset_info(pset, NULL, id_length, NULL) == 0) {
337 // Make up an array to hold their ids.
338 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
339 // Fill in the array with their processor ids.
340 if (pset_info(pset, NULL, id_length, *id_array) == 0) {
341 result = true;
342 }
343 }
344 return result;
345 }
346
347 // Callers of find_processors_online() must tolerate imprecise results --
348 // the system configuration can change asynchronously because of DR
349 // or explicit psradm operations.
350 //
351 // We also need to take care that the loop (below) terminates as the
352 // number of processors online can change between the _SC_NPROCESSORS_ONLN
353 // request and the loop that builds the list of processor ids. Unfortunately
354 // there's no reliable way to determine the maximum valid processor id,
355 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online
356 // man pages, which claim the processor id set is "sparse, but
357 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually
358 // exit the loop.
359 //
360 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's
361 // not available on S8.0.
362
363 static bool find_processors_online(processorid_t** id_array,
364 uint* id_length) {
365 const processorid_t MAX_PROCESSOR_ID = 100000;
366 // Find the number of processors online.
367 *id_length = sysconf(_SC_NPROCESSORS_ONLN);
368 // Make up an array to hold their ids.
369 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal);
370 // Processors need not be numbered consecutively.
371 long found = 0;
372 processorid_t next = 0;
373 while (found < *id_length && next < MAX_PROCESSOR_ID) {
374 processor_info_t info;
375 if (processor_info(next, &info) == 0) {
376 // NB, PI_NOINTR processors are effectively online ...
377 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) {
378 (*id_array)[found] = next;
379 found += 1;
380 }
381 }
382 next += 1;
383 }
384 if (found < *id_length) {
385 // The loop above didn't identify the expected number of processors.
386 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN)
387 // and re-running the loop, above, but there's no guarantee of progress
388 // if the system configuration is in flux. Instead, we just return what
389 // we've got. Note that in the worst case find_processors_online() could
390 // return an empty set. (As a fall-back in the case of the empty set we
391 // could just return the ID of the current processor).
392 *id_length = found;
393 }
394
395 return true;
396 }
397
398 static bool assign_distribution(processorid_t* id_array,
399 uint id_length,
400 uint* distribution,
401 uint distribution_length) {
402 // We assume we can assign processorid_t's to uint's.
403 assert(sizeof(processorid_t) == sizeof(uint),
404 "can't convert processorid_t to uint");
405 // Quick check to see if we won't succeed.
406 if (id_length < distribution_length) {
407 return false;
408 }
409 // Assign processor ids to the distribution.
410 // Try to shuffle processors to distribute work across boards,
411 // assuming 4 processors per board.
412 const uint processors_per_board = ProcessDistributionStride;
413 // Find the maximum processor id.
414 processorid_t max_id = 0;
415 for (uint m = 0; m < id_length; m += 1) {
416 max_id = MAX2(max_id, id_array[m]);
417 }
418 // The next id, to limit loops.
419 const processorid_t limit_id = max_id + 1;
420 // Make up markers for available processors.
421 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal);
422 for (uint c = 0; c < limit_id; c += 1) {
423 available_id[c] = false;
424 }
425 for (uint a = 0; a < id_length; a += 1) {
426 available_id[id_array[a]] = true;
427 }
428 // Step by "boards", then by "slot", copying to "assigned".
429 // NEEDS_CLEANUP: The assignment of processors should be stateful,
430 // remembering which processors have been assigned by
431 // previous calls, etc., so as to distribute several
432 // independent calls of this method. What we'd like is
433 // It would be nice to have an API that let us ask
434 // how many processes are bound to a processor,
435 // but we don't have that, either.
436 // In the short term, "board" is static so that
437 // subsequent distributions don't all start at board 0.
438 static uint board = 0;
439 uint assigned = 0;
440 // Until we've found enough processors ....
441 while (assigned < distribution_length) {
442 // ... find the next available processor in the board.
443 for (uint slot = 0; slot < processors_per_board; slot += 1) {
444 uint try_id = board * processors_per_board + slot;
445 if ((try_id < limit_id) && (available_id[try_id] == true)) {
446 distribution[assigned] = try_id;
447 available_id[try_id] = false;
448 assigned += 1;
449 break;
450 }
451 }
452 board += 1;
453 if (board * processors_per_board + 0 >= limit_id) {
454 board = 0;
455 }
456 }
457 if (available_id != NULL) {
458 FREE_C_HEAP_ARRAY(bool, available_id);
459 }
460 return true;
461 }
462
463 void os::set_native_thread_name(const char *name) {
464 if (Solaris::_pthread_setname_np != NULL) {
465 // Only the first 31 bytes of 'name' are processed by pthread_setname_np
466 // but we explicitly copy into a size-limited buffer to avoid any
467 // possible overflow.
468 char buf[32];
469 snprintf(buf, sizeof(buf), "%s", name);
470 buf[sizeof(buf) - 1] = '\0';
471 Solaris::_pthread_setname_np(pthread_self(), buf);
472 }
473 }
474
475 bool os::distribute_processes(uint length, uint* distribution) {
476 bool result = false;
477 // Find the processor id's of all the available CPUs.
478 processorid_t* id_array = NULL;
479 uint id_length = 0;
480 // There are some races between querying information and using it,
481 // since processor sets can change dynamically.
482 psetid_t pset = PS_NONE;
483 // Are we running in a processor set?
484 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) {
485 result = find_processors_in_pset(pset, &id_array, &id_length);
486 } else {
487 result = find_processors_online(&id_array, &id_length);
488 }
489 if (result == true) {
490 if (id_length >= length) {
491 result = assign_distribution(id_array, id_length, distribution, length);
492 } else {
493 result = false;
494 }
495 }
496 if (id_array != NULL) {
497 FREE_C_HEAP_ARRAY(processorid_t, id_array);
498 }
499 return result;
500 }
501
502 bool os::bind_to_processor(uint processor_id) {
503 // We assume that a processorid_t can be stored in a uint.
504 assert(sizeof(uint) == sizeof(processorid_t),
505 "can't convert uint to processorid_t");
506 int bind_result =
507 processor_bind(P_LWPID, // bind LWP.
508 P_MYID, // bind current LWP.
509 (processorid_t) processor_id, // id.
510 NULL); // don't return old binding.
511 return (bind_result == 0);
512 }
513
514 // Return true if user is running as root.
515
516 bool os::have_special_privileges() {
517 static bool init = false;
518 static bool privileges = false;
519 if (!init) {
520 privileges = (getuid() != geteuid()) || (getgid() != getegid());
521 init = true;
522 }
523 return privileges;
524 }
525
526
527 void os::init_system_properties_values() {
528 // The next steps are taken in the product version:
529 //
530 // Obtain the JAVA_HOME value from the location of libjvm.so.
531 // This library should be located at:
532 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so.
533 //
534 // If "/jre/lib/" appears at the right place in the path, then we
535 // assume libjvm.so is installed in a JDK and we use this path.
536 //
537 // Otherwise exit with message: "Could not create the Java virtual machine."
538 //
539 // The following extra steps are taken in the debugging version:
540 //
541 // If "/jre/lib/" does NOT appear at the right place in the path
542 // instead of exit check for $JAVA_HOME environment variable.
543 //
544 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
545 // then we append a fake suffix "hotspot/libjvm.so" to this path so
546 // it looks like libjvm.so is installed there
547 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so.
548 //
549 // Otherwise exit.
550 //
551 // Important note: if the location of libjvm.so changes this
552 // code needs to be changed accordingly.
553
554 // Base path of extensions installed on the system.
555 #define SYS_EXT_DIR "/usr/jdk/packages"
556 #define EXTENSIONS_DIR "/lib/ext"
557
558 // Buffer that fits several sprintfs.
559 // Note that the space for the colon and the trailing null are provided
560 // by the nulls included by the sizeof operator.
561 const size_t bufsize =
562 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends.
563 sizeof(SYS_EXT_DIR) + sizeof("/lib/"), // invariant ld_library_path
564 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir
565 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal);
566
567 // sysclasspath, java_home, dll_dir
568 {
569 char *pslash;
570 os::jvm_path(buf, bufsize);
571
572 // Found the full path to libjvm.so.
573 // Now cut the path to <java_home>/jre if we can.
574 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so.
575 pslash = strrchr(buf, '/');
576 if (pslash != NULL) {
577 *pslash = '\0'; // Get rid of /{client|server|hotspot}.
578 }
579 Arguments::set_dll_dir(buf);
580
581 if (pslash != NULL) {
582 pslash = strrchr(buf, '/');
583 if (pslash != NULL) {
584 *pslash = '\0'; // Get rid of /lib.
585 }
586 }
587 Arguments::set_java_home(buf);
588 set_boot_path('/', ':');
589 }
590
591 // Where to look for native libraries.
592 {
593 // Use dlinfo() to determine the correct java.library.path.
594 //
595 // If we're launched by the Java launcher, and the user
596 // does not set java.library.path explicitly on the commandline,
597 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
598 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
599 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
600 // /usr/lib), which is exactly what we want.
601 //
602 // If the user does set java.library.path, it completely
603 // overwrites this setting, and always has.
604 //
605 // If we're not launched by the Java launcher, we may
606 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
607 // settings. Again, dlinfo does exactly what we want.
608
609 Dl_serinfo info_sz, *info = &info_sz;
610 Dl_serpath *path;
611 char *library_path;
612 char *common_path = buf;
613
614 // Determine search path count and required buffer size.
615 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
616 FREE_C_HEAP_ARRAY(char, buf);
617 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
618 }
619
620 // Allocate new buffer and initialize.
621 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal);
622 info->dls_size = info_sz.dls_size;
623 info->dls_cnt = info_sz.dls_cnt;
624
625 // Obtain search path information.
626 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
627 FREE_C_HEAP_ARRAY(char, buf);
628 FREE_C_HEAP_ARRAY(char, info);
629 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
630 }
631
632 path = &info->dls_serpath[0];
633
634 // Note: Due to a legacy implementation, most of the library path
635 // is set in the launcher. This was to accomodate linking restrictions
636 // on legacy Solaris implementations (which are no longer supported).
637 // Eventually, all the library path setting will be done here.
638 //
639 // However, to prevent the proliferation of improperly built native
640 // libraries, the new path component /usr/jdk/packages is added here.
641
642 // Construct the invariant part of ld_library_path.
643 sprintf(common_path, SYS_EXT_DIR "/lib");
644
645 // Struct size is more than sufficient for the path components obtained
646 // through the dlinfo() call, so only add additional space for the path
647 // components explicitly added here.
648 size_t library_path_size = info->dls_size + strlen(common_path);
649 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal);
650 library_path[0] = '\0';
651
652 // Construct the desired Java library path from the linker's library
653 // search path.
654 //
655 // For compatibility, it is optimal that we insert the additional path
656 // components specific to the Java VM after those components specified
657 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
658 // infrastructure.
659 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it.
660 strcpy(library_path, common_path);
661 } else {
662 int inserted = 0;
663 int i;
664 for (i = 0; i < info->dls_cnt; i++, path++) {
665 uint_t flags = path->dls_flags & LA_SER_MASK;
666 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
667 strcat(library_path, common_path);
668 strcat(library_path, os::path_separator());
669 inserted = 1;
670 }
671 strcat(library_path, path->dls_name);
672 strcat(library_path, os::path_separator());
673 }
674 // Eliminate trailing path separator.
675 library_path[strlen(library_path)-1] = '\0';
676 }
677
678 // happens before argument parsing - can't use a trace flag
679 // tty->print_raw("init_system_properties_values: native lib path: ");
680 // tty->print_raw_cr(library_path);
681
682 // Callee copies into its own buffer.
683 Arguments::set_library_path(library_path);
684
685 FREE_C_HEAP_ARRAY(char, library_path);
686 FREE_C_HEAP_ARRAY(char, info);
687 }
688
689 // Extensions directories.
690 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home());
691 Arguments::set_ext_dirs(buf);
692
693 FREE_C_HEAP_ARRAY(char, buf);
694
695 #undef SYS_EXT_DIR
696 #undef EXTENSIONS_DIR
697 }
698
699 void os::breakpoint() {
700 BREAKPOINT;
701 }
702
703 bool os::obsolete_option(const JavaVMOption *option) {
704 if (!strncmp(option->optionString, "-Xt", 3)) {
705 return true;
706 } else if (!strncmp(option->optionString, "-Xtm", 4)) {
707 return true;
708 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) {
709 return true;
710 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) {
711 return true;
712 }
713 return false;
714 }
715
716 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
717 address stackStart = (address)thread->stack_base();
718 address stackEnd = (address)(stackStart - (address)thread->stack_size());
719 if (sp < stackStart && sp >= stackEnd) return true;
720 return false;
721 }
722
723 extern "C" void breakpoint() {
724 // use debugger to set breakpoint here
725 }
726
727 static thread_t main_thread;
728
729 // Thread start routine for all newly created threads
730 extern "C" void* thread_native_entry(void* thread_addr) {
731
732 Thread* thread = (Thread*)thread_addr;
733
734 thread->record_stack_base_and_size();
735
736 // Try to randomize the cache line index of hot stack frames.
737 // This helps when threads of the same stack traces evict each other's
738 // cache lines. The threads can be either from the same JVM instance, or
739 // from different JVM instances. The benefit is especially true for
740 // processors with hyperthreading technology.
741 static int counter = 0;
742 int pid = os::current_process_id();
743 alloca(((pid ^ counter++) & 7) * 128);
744
745 int prio;
746
747 thread->initialize_thread_current();
748
749 OSThread* osthr = thread->osthread();
750
751 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound
752 thread->_schedctl = (void *) schedctl_init();
753
754 log_info(os, thread)("Thread is alive (tid: " UINTX_FORMAT ").",
755 os::current_thread_id());
756
757 if (UseNUMA) {
758 int lgrp_id = os::numa_get_group_id();
759 if (lgrp_id != -1) {
760 thread->set_lgrp_id(lgrp_id);
761 }
762 }
763
764 // Our priority was set when we were created, and stored in the
765 // osthread, but couldn't be passed through to our LWP until now.
766 // So read back the priority and set it again.
767
768 if (osthr->thread_id() != -1) {
769 if (UseThreadPriorities) {
770 int prio = osthr->native_priority();
771 if (ThreadPriorityVerbose) {
772 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
773 INTPTR_FORMAT ", setting priority: %d\n",
774 osthr->thread_id(), osthr->lwp_id(), prio);
775 }
776 os::set_native_priority(thread, prio);
777 }
778 } else if (ThreadPriorityVerbose) {
779 warning("Can't set priority in _start routine, thread id hasn't been set\n");
780 }
781
782 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
783
784 // initialize signal mask for this thread
785 os::Solaris::hotspot_sigmask(thread);
786
787 os::Solaris::init_thread_fpu_state();
788 std::set_terminate(_handle_uncaught_cxx_exception);
789
790 thread->call_run();
791
792 // Note: at this point the thread object may already have deleted itself.
793 // Do not dereference it from here on out.
794
795 // One less thread is executing
796 // When the VMThread gets here, the main thread may have already exited
797 // which frees the CodeHeap containing the Atomic::dec code
798 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
799 Atomic::dec(&os::Solaris::_os_thread_count);
800 }
801
802 log_info(os, thread)("Thread finished (tid: " UINTX_FORMAT ").", os::current_thread_id());
803
804 if (UseDetachedThreads) {
805 thr_exit(NULL);
806 ShouldNotReachHere();
807 }
808 return NULL;
809 }
810
811 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
812 // Allocate the OSThread object
813 OSThread* osthread = new OSThread(NULL, NULL);
814 if (osthread == NULL) return NULL;
815
816 // Store info on the Solaris thread into the OSThread
817 osthread->set_thread_id(thread_id);
818 osthread->set_lwp_id(_lwp_self());
819 thread->_schedctl = (void *) schedctl_init();
820
821 if (UseNUMA) {
822 int lgrp_id = os::numa_get_group_id();
823 if (lgrp_id != -1) {
824 thread->set_lgrp_id(lgrp_id);
825 }
826 }
827
828 if (ThreadPriorityVerbose) {
829 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
830 osthread->thread_id(), osthread->lwp_id());
831 }
832
833 // Initial thread state is INITIALIZED, not SUSPENDED
834 osthread->set_state(INITIALIZED);
835
836 return osthread;
837 }
838
839 void os::Solaris::hotspot_sigmask(Thread* thread) {
840 //Save caller's signal mask
841 sigset_t sigmask;
842 pthread_sigmask(SIG_SETMASK, NULL, &sigmask);
843 OSThread *osthread = thread->osthread();
844 osthread->set_caller_sigmask(sigmask);
845
846 pthread_sigmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
847 if (!ReduceSignalUsage) {
848 if (thread->is_VM_thread()) {
849 // Only the VM thread handles BREAK_SIGNAL ...
850 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL);
851 } else {
852 // ... all other threads block BREAK_SIGNAL
853 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
854 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL);
855 }
856 }
857 }
858
859 bool os::create_attached_thread(JavaThread* thread) {
860 #ifdef ASSERT
861 thread->verify_not_published();
862 #endif
863 OSThread* osthread = create_os_thread(thread, thr_self());
864 if (osthread == NULL) {
865 return false;
866 }
867
868 // Initial thread state is RUNNABLE
869 osthread->set_state(RUNNABLE);
870 thread->set_osthread(osthread);
871
872 // initialize signal mask for this thread
873 // and save the caller's signal mask
874 os::Solaris::hotspot_sigmask(thread);
875
876 log_info(os, thread)("Thread attached (tid: " UINTX_FORMAT ").",
877 os::current_thread_id());
878
879 return true;
880 }
881
882 bool os::create_main_thread(JavaThread* thread) {
883 #ifdef ASSERT
884 thread->verify_not_published();
885 #endif
886 if (_starting_thread == NULL) {
887 _starting_thread = create_os_thread(thread, main_thread);
888 if (_starting_thread == NULL) {
889 return false;
890 }
891 }
892
893 // The primodial thread is runnable from the start
894 _starting_thread->set_state(RUNNABLE);
895
896 thread->set_osthread(_starting_thread);
897
898 // initialize signal mask for this thread
899 // and save the caller's signal mask
900 os::Solaris::hotspot_sigmask(thread);
901
902 return true;
903 }
904
905 // Helper function to trace thread attributes, similar to os::Posix::describe_pthread_attr()
906 static char* describe_thr_create_attributes(char* buf, size_t buflen,
907 size_t stacksize, long flags) {
908 stringStream ss(buf, buflen);
909 ss.print("stacksize: " SIZE_FORMAT "k, ", stacksize / 1024);
910 ss.print("flags: ");
911 #define PRINT_FLAG(f) if (flags & f) ss.print( #f " ");
912 #define ALL(X) \
913 X(THR_SUSPENDED) \
914 X(THR_DETACHED) \
915 X(THR_BOUND) \
916 X(THR_NEW_LWP) \
917 X(THR_DAEMON)
918 ALL(PRINT_FLAG)
919 #undef ALL
920 #undef PRINT_FLAG
921 return buf;
922 }
923
924 // return default stack size for thr_type
925 size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
926 // default stack size when not specified by caller is 1M (2M for LP64)
927 size_t s = (BytesPerWord >> 2) * K * K;
928 return s;
929 }
930
931 bool os::create_thread(Thread* thread, ThreadType thr_type,
932 size_t req_stack_size) {
933 // Allocate the OSThread object
934 OSThread* osthread = new OSThread(NULL, NULL);
935 if (osthread == NULL) {
936 return false;
937 }
938
939 if (ThreadPriorityVerbose) {
940 char *thrtyp;
941 switch (thr_type) {
942 case vm_thread:
943 thrtyp = (char *)"vm";
944 break;
945 case cgc_thread:
946 thrtyp = (char *)"cgc";
947 break;
948 case pgc_thread:
949 thrtyp = (char *)"pgc";
950 break;
951 case java_thread:
952 thrtyp = (char *)"java";
953 break;
954 case compiler_thread:
955 thrtyp = (char *)"compiler";
956 break;
957 case watcher_thread:
958 thrtyp = (char *)"watcher";
959 break;
960 default:
961 thrtyp = (char *)"unknown";
962 break;
963 }
964 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
965 }
966
967 // calculate stack size if it's not specified by caller
968 size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size);
969
970 // Initial state is ALLOCATED but not INITIALIZED
971 osthread->set_state(ALLOCATED);
972
973 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
974 // We got lots of threads. Check if we still have some address space left.
975 // Need to be at least 5Mb of unreserved address space. We do check by
976 // trying to reserve some.
977 const size_t VirtualMemoryBangSize = 20*K*K;
978 char* mem = os::reserve_memory(VirtualMemoryBangSize);
979 if (mem == NULL) {
980 delete osthread;
981 return false;
982 } else {
983 // Release the memory again
984 os::release_memory(mem, VirtualMemoryBangSize);
985 }
986 }
987
988 // Setup osthread because the child thread may need it.
989 thread->set_osthread(osthread);
990
991 // Create the Solaris thread
992 thread_t tid = 0;
993 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED;
994 int status;
995
996 // Mark that we don't have an lwp or thread id yet.
997 // In case we attempt to set the priority before the thread starts.
998 osthread->set_lwp_id(-1);
999 osthread->set_thread_id(-1);
1000
1001 status = thr_create(NULL, stack_size, thread_native_entry, thread, flags, &tid);
1002
1003 char buf[64];
1004 if (status == 0) {
1005 log_info(os, thread)("Thread started (tid: " UINTX_FORMAT ", attributes: %s). ",
1006 (uintx) tid, describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags));
1007 } else {
1008 log_warning(os, thread)("Failed to start thread - thr_create failed (%s) for attributes: %s.",
1009 os::errno_name(status), describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags));
1010 // Log some OS information which might explain why creating the thread failed.
1011 log_info(os, thread)("Number of threads approx. running in the VM: %d", Threads::number_of_threads());
1012 LogStream st(Log(os, thread)::info());
1013 os::Posix::print_rlimit_info(&st);
1014 os::print_memory_info(&st);
1015 }
1016
1017 if (status != 0) {
1018 thread->set_osthread(NULL);
1019 // Need to clean up stuff we've allocated so far
1020 delete osthread;
1021 return false;
1022 }
1023
1024 Atomic::inc(&os::Solaris::_os_thread_count);
1025
1026 // Store info on the Solaris thread into the OSThread
1027 osthread->set_thread_id(tid);
1028
1029 // Remember that we created this thread so we can set priority on it
1030 osthread->set_vm_created();
1031
1032 // Most thread types will set an explicit priority before starting the thread,
1033 // but for those that don't we need a valid value to read back in thread_native_entry.
1034 osthread->set_native_priority(NormPriority);
1035
1036 // Initial thread state is INITIALIZED, not SUSPENDED
1037 osthread->set_state(INITIALIZED);
1038
1039 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1040 return true;
1041 }
1042
1043 debug_only(static bool signal_sets_initialized = false);
1044 static sigset_t unblocked_sigs, vm_sigs;
1045
1046 void os::Solaris::signal_sets_init() {
1047 // Should also have an assertion stating we are still single-threaded.
1048 assert(!signal_sets_initialized, "Already initialized");
1049 // Fill in signals that are necessarily unblocked for all threads in
1050 // the VM. Currently, we unblock the following signals:
1051 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1052 // by -Xrs (=ReduceSignalUsage));
1053 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1054 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1055 // the dispositions or masks wrt these signals.
1056 // Programs embedding the VM that want to use the above signals for their
1057 // own purposes must, at this time, use the "-Xrs" option to prevent
1058 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1059 // (See bug 4345157, and other related bugs).
1060 // In reality, though, unblocking these signals is really a nop, since
1061 // these signals are not blocked by default.
1062 sigemptyset(&unblocked_sigs);
1063 sigaddset(&unblocked_sigs, SIGILL);
1064 sigaddset(&unblocked_sigs, SIGSEGV);
1065 sigaddset(&unblocked_sigs, SIGBUS);
1066 sigaddset(&unblocked_sigs, SIGFPE);
1067 sigaddset(&unblocked_sigs, ASYNC_SIGNAL);
1068
1069 if (!ReduceSignalUsage) {
1070 if (!os::Posix::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1071 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1072 }
1073 if (!os::Posix::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1074 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1075 }
1076 if (!os::Posix::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1077 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1078 }
1079 }
1080 // Fill in signals that are blocked by all but the VM thread.
1081 sigemptyset(&vm_sigs);
1082 if (!ReduceSignalUsage) {
1083 sigaddset(&vm_sigs, BREAK_SIGNAL);
1084 }
1085 debug_only(signal_sets_initialized = true);
1086
1087 // For diagnostics only used in run_periodic_checks
1088 sigemptyset(&check_signal_done);
1089 }
1090
1091 // These are signals that are unblocked while a thread is running Java.
1092 // (For some reason, they get blocked by default.)
1093 sigset_t* os::Solaris::unblocked_signals() {
1094 assert(signal_sets_initialized, "Not initialized");
1095 return &unblocked_sigs;
1096 }
1097
1098 // These are the signals that are blocked while a (non-VM) thread is
1099 // running Java. Only the VM thread handles these signals.
1100 sigset_t* os::Solaris::vm_signals() {
1101 assert(signal_sets_initialized, "Not initialized");
1102 return &vm_sigs;
1103 }
1104
1105 // CR 7190089: on Solaris, primordial thread's stack needs adjusting.
1106 // Without the adjustment, stack size is incorrect if stack is set to unlimited (ulimit -s unlimited).
1107 void os::Solaris::correct_stack_boundaries_for_primordial_thread(Thread* thr) {
1108 assert(is_primordial_thread(), "Call only for primordial thread");
1109
1110 JavaThread* jt = (JavaThread *)thr;
1111 assert(jt != NULL, "Sanity check");
1112 size_t stack_size;
1113 address base = jt->stack_base();
1114 if (Arguments::created_by_java_launcher()) {
1115 // Use 2MB to allow for Solaris 7 64 bit mode.
1116 stack_size = JavaThread::stack_size_at_create() == 0
1117 ? 2048*K : JavaThread::stack_size_at_create();
1118
1119 // There are rare cases when we may have already used more than
1120 // the basic stack size allotment before this method is invoked.
1121 // Attempt to allow for a normally sized java_stack.
1122 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1123 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1124 } else {
1125 // 6269555: If we were not created by a Java launcher, i.e. if we are
1126 // running embedded in a native application, treat the primordial thread
1127 // as much like a native attached thread as possible. This means using
1128 // the current stack size from thr_stksegment(), unless it is too large
1129 // to reliably setup guard pages. A reasonable max size is 8MB.
1130 size_t current_size = os::current_stack_size();
1131 // This should never happen, but just in case....
1132 if (current_size == 0) current_size = 2 * K * K;
1133 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1134 }
1135 address bottom = align_up(base - stack_size, os::vm_page_size());;
1136 stack_size = (size_t)(base - bottom);
1137
1138 assert(stack_size > 0, "Stack size calculation problem");
1139
1140 if (stack_size > jt->stack_size()) {
1141 #ifndef PRODUCT
1142 struct rlimit limits;
1143 getrlimit(RLIMIT_STACK, &limits);
1144 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1145 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1146 #endif
1147 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n"
1148 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1149 "See limit(1) to increase the stack size limit.",
1150 stack_size / K, jt->stack_size() / K);
1151 vm_exit(1);
1152 }
1153 assert(jt->stack_size() >= stack_size,
1154 "Attempt to map more stack than was allocated");
1155 jt->set_stack_size(stack_size);
1156
1157 }
1158
1159
1160
1161 // Free Solaris resources related to the OSThread
1162 void os::free_thread(OSThread* osthread) {
1163 assert(osthread != NULL, "os::free_thread but osthread not set");
1164
1165 // We are told to free resources of the argument thread,
1166 // but we can only really operate on the current thread.
1167 assert(Thread::current()->osthread() == osthread,
1168 "os::free_thread but not current thread");
1169
1170 // Restore caller's signal mask
1171 sigset_t sigmask = osthread->caller_sigmask();
1172 pthread_sigmask(SIG_SETMASK, &sigmask, NULL);
1173
1174 delete osthread;
1175 }
1176
1177 void os::pd_start_thread(Thread* thread) {
1178 int status = thr_continue(thread->osthread()->thread_id());
1179 assert_status(status == 0, status, "thr_continue failed");
1180 }
1181
1182
1183 intx os::current_thread_id() {
1184 return (intx)thr_self();
1185 }
1186
1187 static pid_t _initial_pid = 0;
1188
1189 int os::current_process_id() {
1190 return (int)(_initial_pid ? _initial_pid : getpid());
1191 }
1192
1193 // gethrtime() should be monotonic according to the documentation,
1194 // but some virtualized platforms are known to break this guarantee.
1195 // getTimeNanos() must be guaranteed not to move backwards, so we
1196 // are forced to add a check here.
1197 inline hrtime_t getTimeNanos() {
1198 const hrtime_t now = gethrtime();
1199 const hrtime_t prev = max_hrtime;
1200 if (now <= prev) {
1201 return prev; // same or retrograde time;
1202 }
1203 const hrtime_t obsv = Atomic::cmpxchg(now, &max_hrtime, prev);
1204 assert(obsv >= prev, "invariant"); // Monotonicity
1205 // If the CAS succeeded then we're done and return "now".
1206 // If the CAS failed and the observed value "obsv" is >= now then
1207 // we should return "obsv". If the CAS failed and now > obsv > prv then
1208 // some other thread raced this thread and installed a new value, in which case
1209 // we could either (a) retry the entire operation, (b) retry trying to install now
1210 // or (c) just return obsv. We use (c). No loop is required although in some cases
1211 // we might discard a higher "now" value in deference to a slightly lower but freshly
1212 // installed obsv value. That's entirely benign -- it admits no new orderings compared
1213 // to (a) or (b) -- and greatly reduces coherence traffic.
1214 // We might also condition (c) on the magnitude of the delta between obsv and now.
1215 // Avoiding excessive CAS operations to hot RW locations is critical.
1216 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate
1217 return (prev == obsv) ? now : obsv;
1218 }
1219
1220 // Time since start-up in seconds to a fine granularity.
1221 // Used by VMSelfDestructTimer and the MemProfiler.
1222 double os::elapsedTime() {
1223 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1224 }
1225
1226 jlong os::elapsed_counter() {
1227 return (jlong)(getTimeNanos() - first_hrtime);
1228 }
1229
1230 jlong os::elapsed_frequency() {
1231 return hrtime_hz;
1232 }
1233
1234 // Return the real, user, and system times in seconds from an
1235 // arbitrary fixed point in the past.
1236 bool os::getTimesSecs(double* process_real_time,
1237 double* process_user_time,
1238 double* process_system_time) {
1239 struct tms ticks;
1240 clock_t real_ticks = times(&ticks);
1241
1242 if (real_ticks == (clock_t) (-1)) {
1243 return false;
1244 } else {
1245 double ticks_per_second = (double) clock_tics_per_sec;
1246 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1247 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1248 // For consistency return the real time from getTimeNanos()
1249 // converted to seconds.
1250 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1251
1252 return true;
1253 }
1254 }
1255
1256 bool os::supports_vtime() { return true; }
1257 bool os::enable_vtime() { return false; }
1258 bool os::vtime_enabled() { return false; }
1259
1260 double os::elapsedVTime() {
1261 return (double)gethrvtime() / (double)hrtime_hz;
1262 }
1263
1264 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1265 jlong os::javaTimeMillis() {
1266 timeval t;
1267 if (gettimeofday(&t, NULL) == -1) {
1268 fatal("os::javaTimeMillis: gettimeofday (%s)", os::strerror(errno));
1269 }
1270 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1271 }
1272
1273 // Must return seconds+nanos since Jan 1 1970. This must use the same
1274 // time source as javaTimeMillis and can't use get_nsec_fromepoch as
1275 // we need better than 1ms accuracy
1276 void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) {
1277 timeval t;
1278 if (gettimeofday(&t, NULL) == -1) {
1279 fatal("os::javaTimeSystemUTC: gettimeofday (%s)", os::strerror(errno));
1280 }
1281 seconds = jlong(t.tv_sec);
1282 nanos = jlong(t.tv_usec) * 1000;
1283 }
1284
1285
1286 jlong os::javaTimeNanos() {
1287 return (jlong)getTimeNanos();
1288 }
1289
1290 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1291 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1292 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1293 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1294 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1295 }
1296
1297 char * os::local_time_string(char *buf, size_t buflen) {
1298 struct tm t;
1299 time_t long_time;
1300 time(&long_time);
1301 localtime_r(&long_time, &t);
1302 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1303 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1304 t.tm_hour, t.tm_min, t.tm_sec);
1305 return buf;
1306 }
1307
1308 // Note: os::shutdown() might be called very early during initialization, or
1309 // called from signal handler. Before adding something to os::shutdown(), make
1310 // sure it is async-safe and can handle partially initialized VM.
1311 void os::shutdown() {
1312
1313 // allow PerfMemory to attempt cleanup of any persistent resources
1314 perfMemory_exit();
1315
1316 // needs to remove object in file system
1317 AttachListener::abort();
1318
1319 // flush buffered output, finish log files
1320 ostream_abort();
1321
1322 // Check for abort hook
1323 abort_hook_t abort_hook = Arguments::abort_hook();
1324 if (abort_hook != NULL) {
1325 abort_hook();
1326 }
1327 }
1328
1329 // Note: os::abort() might be called very early during initialization, or
1330 // called from signal handler. Before adding something to os::abort(), make
1331 // sure it is async-safe and can handle partially initialized VM.
1332 void os::abort(bool dump_core, void* siginfo, const void* context) {
1333 os::shutdown();
1334 if (dump_core) {
1335 #ifndef PRODUCT
1336 fdStream out(defaultStream::output_fd());
1337 out.print_raw("Current thread is ");
1338 char buf[16];
1339 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1340 out.print_raw_cr(buf);
1341 out.print_raw_cr("Dumping core ...");
1342 #endif
1343 ::abort(); // dump core (for debugging)
1344 }
1345
1346 ::exit(1);
1347 }
1348
1349 // Die immediately, no exit hook, no abort hook, no cleanup.
1350 void os::die() {
1351 ::abort(); // dump core (for debugging)
1352 }
1353
1354 // DLL functions
1355
1356 const char* os::dll_file_extension() { return ".so"; }
1357
1358 // This must be hard coded because it's the system's temporary
1359 // directory not the java application's temp directory, ala java.io.tmpdir.
1360 const char* os::get_temp_directory() { return "/tmp"; }
1361
1362 // check if addr is inside libjvm.so
1363 bool os::address_is_in_vm(address addr) {
1364 static address libjvm_base_addr;
1365 Dl_info dlinfo;
1366
1367 if (libjvm_base_addr == NULL) {
1368 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
1369 libjvm_base_addr = (address)dlinfo.dli_fbase;
1370 }
1371 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1372 }
1373
1374 if (dladdr((void *)addr, &dlinfo) != 0) {
1375 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1376 }
1377
1378 return false;
1379 }
1380
1381 typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int);
1382 static dladdr1_func_type dladdr1_func = NULL;
1383
1384 bool os::dll_address_to_function_name(address addr, char *buf,
1385 int buflen, int * offset,
1386 bool demangle) {
1387 // buf is not optional, but offset is optional
1388 assert(buf != NULL, "sanity check");
1389
1390 Dl_info dlinfo;
1391
1392 // dladdr1_func was initialized in os::init()
1393 if (dladdr1_func != NULL) {
1394 // yes, we have dladdr1
1395
1396 // Support for dladdr1 is checked at runtime; it may be
1397 // available even if the vm is built on a machine that does
1398 // not have dladdr1 support. Make sure there is a value for
1399 // RTLD_DL_SYMENT.
1400 #ifndef RTLD_DL_SYMENT
1401 #define RTLD_DL_SYMENT 1
1402 #endif
1403 #ifdef _LP64
1404 Elf64_Sym * info;
1405 #else
1406 Elf32_Sym * info;
1407 #endif
1408 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1409 RTLD_DL_SYMENT) != 0) {
1410 // see if we have a matching symbol that covers our address
1411 if (dlinfo.dli_saddr != NULL &&
1412 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1413 if (dlinfo.dli_sname != NULL) {
1414 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) {
1415 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1416 }
1417 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1418 return true;
1419 }
1420 }
1421 // no matching symbol so try for just file info
1422 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1423 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1424 buf, buflen, offset, dlinfo.dli_fname, demangle)) {
1425 return true;
1426 }
1427 }
1428 }
1429 buf[0] = '\0';
1430 if (offset != NULL) *offset = -1;
1431 return false;
1432 }
1433
1434 // no, only dladdr is available
1435 if (dladdr((void *)addr, &dlinfo) != 0) {
1436 // see if we have a matching symbol
1437 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
1438 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) {
1439 jio_snprintf(buf, buflen, dlinfo.dli_sname);
1440 }
1441 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1442 return true;
1443 }
1444 // no matching symbol so try for just file info
1445 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1446 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1447 buf, buflen, offset, dlinfo.dli_fname, demangle)) {
1448 return true;
1449 }
1450 }
1451 }
1452 buf[0] = '\0';
1453 if (offset != NULL) *offset = -1;
1454 return false;
1455 }
1456
1457 bool os::dll_address_to_library_name(address addr, char* buf,
1458 int buflen, int* offset) {
1459 // buf is not optional, but offset is optional
1460 assert(buf != NULL, "sanity check");
1461
1462 Dl_info dlinfo;
1463
1464 if (dladdr((void*)addr, &dlinfo) != 0) {
1465 if (dlinfo.dli_fname != NULL) {
1466 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1467 }
1468 if (dlinfo.dli_fbase != NULL && offset != NULL) {
1469 *offset = addr - (address)dlinfo.dli_fbase;
1470 }
1471 return true;
1472 }
1473
1474 buf[0] = '\0';
1475 if (offset) *offset = -1;
1476 return false;
1477 }
1478
1479 int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) {
1480 Dl_info dli;
1481 // Sanity check?
1482 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 ||
1483 dli.dli_fname == NULL) {
1484 return 1;
1485 }
1486
1487 void * handle = dlopen(dli.dli_fname, RTLD_LAZY);
1488 if (handle == NULL) {
1489 return 1;
1490 }
1491
1492 Link_map *map;
1493 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1494 if (map == NULL) {
1495 dlclose(handle);
1496 return 1;
1497 }
1498
1499 while (map->l_prev != NULL) {
1500 map = map->l_prev;
1501 }
1502
1503 while (map != NULL) {
1504 // Iterate through all map entries and call callback with fields of interest
1505 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) {
1506 dlclose(handle);
1507 return 1;
1508 }
1509 map = map->l_next;
1510 }
1511
1512 dlclose(handle);
1513 return 0;
1514 }
1515
1516 int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) {
1517 outputStream * out = (outputStream *) param;
1518 out->print_cr(PTR_FORMAT " \t%s", base_address, name);
1519 return 0;
1520 }
1521
1522 void os::print_dll_info(outputStream * st) {
1523 st->print_cr("Dynamic libraries:"); st->flush();
1524 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) {
1525 st->print_cr("Error: Cannot print dynamic libraries.");
1526 }
1527 }
1528
1529 // Loads .dll/.so and
1530 // in case of error it checks if .dll/.so was built for the
1531 // same architecture as Hotspot is running on
1532
1533 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
1534 void * result= ::dlopen(filename, RTLD_LAZY);
1535 if (result != NULL) {
1536 // Successful loading
1537 return result;
1538 }
1539
1540 Elf32_Ehdr elf_head;
1541
1542 // Read system error message into ebuf
1543 // It may or may not be overwritten below
1544 ::strncpy(ebuf, ::dlerror(), ebuflen-1);
1545 ebuf[ebuflen-1]='\0';
1546 int diag_msg_max_length=ebuflen-strlen(ebuf);
1547 char* diag_msg_buf=ebuf+strlen(ebuf);
1548
1549 if (diag_msg_max_length==0) {
1550 // No more space in ebuf for additional diagnostics message
1551 return NULL;
1552 }
1553
1554
1555 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1556
1557 if (file_descriptor < 0) {
1558 // Can't open library, report dlerror() message
1559 return NULL;
1560 }
1561
1562 bool failed_to_read_elf_head=
1563 (sizeof(elf_head)!=
1564 (::read(file_descriptor, &elf_head,sizeof(elf_head))));
1565
1566 ::close(file_descriptor);
1567 if (failed_to_read_elf_head) {
1568 // file i/o error - report dlerror() msg
1569 return NULL;
1570 }
1571
1572 typedef struct {
1573 Elf32_Half code; // Actual value as defined in elf.h
1574 Elf32_Half compat_class; // Compatibility of archs at VM's sense
1575 char elf_class; // 32 or 64 bit
1576 char endianess; // MSB or LSB
1577 char* name; // String representation
1578 } arch_t;
1579
1580 static const arch_t arch_array[]={
1581 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1582 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1583 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
1584 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
1585 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1586 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1587 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
1588 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
1589 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
1590 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"}
1591 };
1592
1593 #if (defined IA32)
1594 static Elf32_Half running_arch_code=EM_386;
1595 #elif (defined AMD64)
1596 static Elf32_Half running_arch_code=EM_X86_64;
1597 #elif (defined IA64)
1598 static Elf32_Half running_arch_code=EM_IA_64;
1599 #elif (defined __sparc) && (defined _LP64)
1600 static Elf32_Half running_arch_code=EM_SPARCV9;
1601 #elif (defined __sparc) && (!defined _LP64)
1602 static Elf32_Half running_arch_code=EM_SPARC;
1603 #elif (defined __powerpc64__)
1604 static Elf32_Half running_arch_code=EM_PPC64;
1605 #elif (defined __powerpc__)
1606 static Elf32_Half running_arch_code=EM_PPC;
1607 #elif (defined ARM)
1608 static Elf32_Half running_arch_code=EM_ARM;
1609 #else
1610 #error Method os::dll_load requires that one of following is defined:\
1611 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
1612 #endif
1613
1614 // Identify compatability class for VM's architecture and library's architecture
1615 // Obtain string descriptions for architectures
1616
1617 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
1618 int running_arch_index=-1;
1619
1620 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) {
1621 if (running_arch_code == arch_array[i].code) {
1622 running_arch_index = i;
1623 }
1624 if (lib_arch.code == arch_array[i].code) {
1625 lib_arch.compat_class = arch_array[i].compat_class;
1626 lib_arch.name = arch_array[i].name;
1627 }
1628 }
1629
1630 assert(running_arch_index != -1,
1631 "Didn't find running architecture code (running_arch_code) in arch_array");
1632 if (running_arch_index == -1) {
1633 // Even though running architecture detection failed
1634 // we may still continue with reporting dlerror() message
1635 return NULL;
1636 }
1637
1638 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
1639 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
1640 return NULL;
1641 }
1642
1643 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
1644 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
1645 return NULL;
1646 }
1647
1648 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
1649 if (lib_arch.name!=NULL) {
1650 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1651 " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
1652 lib_arch.name, arch_array[running_arch_index].name);
1653 } else {
1654 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1655 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
1656 lib_arch.code,
1657 arch_array[running_arch_index].name);
1658 }
1659 }
1660
1661 return NULL;
1662 }
1663
1664 void* os::dll_lookup(void* handle, const char* name) {
1665 return dlsym(handle, name);
1666 }
1667
1668 void* os::get_default_process_handle() {
1669 return (void*)::dlopen(NULL, RTLD_LAZY);
1670 }
1671
1672 static inline time_t get_mtime(const char* filename) {
1673 struct stat st;
1674 int ret = os::stat(filename, &st);
1675 assert(ret == 0, "failed to stat() file '%s': %s", filename, strerror(errno));
1676 return st.st_mtime;
1677 }
1678
1679 int os::compare_file_modified_times(const char* file1, const char* file2) {
1680 time_t t1 = get_mtime(file1);
1681 time_t t2 = get_mtime(file2);
1682 return t1 - t2;
1683 }
1684
1685 static bool _print_ascii_file(const char* filename, outputStream* st) {
1686 int fd = ::open(filename, O_RDONLY);
1687 if (fd == -1) {
1688 return false;
1689 }
1690
1691 char buf[32];
1692 int bytes;
1693 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
1694 st->print_raw(buf, bytes);
1695 }
1696
1697 ::close(fd);
1698
1699 return true;
1700 }
1701
1702 void os::print_os_info_brief(outputStream* st) {
1703 os::Solaris::print_distro_info(st);
1704
1705 os::Posix::print_uname_info(st);
1706
1707 os::Solaris::print_libversion_info(st);
1708 }
1709
1710 void os::print_os_info(outputStream* st) {
1711 st->print("OS:");
1712
1713 os::Solaris::print_distro_info(st);
1714
1715 os::Posix::print_uname_info(st);
1716
1717 os::Solaris::print_libversion_info(st);
1718
1719 os::Posix::print_rlimit_info(st);
1720
1721 os::Posix::print_load_average(st);
1722 }
1723
1724 void os::Solaris::print_distro_info(outputStream* st) {
1725 if (!_print_ascii_file("/etc/release", st)) {
1726 st->print("Solaris");
1727 }
1728 st->cr();
1729 }
1730
1731 void os::get_summary_os_info(char* buf, size_t buflen) {
1732 strncpy(buf, "Solaris", buflen); // default to plain solaris
1733 FILE* fp = fopen("/etc/release", "r");
1734 if (fp != NULL) {
1735 char tmp[256];
1736 // Only get the first line and chop out everything but the os name.
1737 if (fgets(tmp, sizeof(tmp), fp)) {
1738 char* ptr = tmp;
1739 // skip past whitespace characters
1740 while (*ptr != '\0' && (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')) ptr++;
1741 if (*ptr != '\0') {
1742 char* nl = strchr(ptr, '\n');
1743 if (nl != NULL) *nl = '\0';
1744 strncpy(buf, ptr, buflen);
1745 }
1746 }
1747 fclose(fp);
1748 }
1749 }
1750
1751 void os::Solaris::print_libversion_info(outputStream* st) {
1752 st->print(" (T2 libthread)");
1753 st->cr();
1754 }
1755
1756 static bool check_addr0(outputStream* st) {
1757 jboolean status = false;
1758 const int read_chunk = 200;
1759 int ret = 0;
1760 int nmap = 0;
1761 int fd = ::open("/proc/self/map",O_RDONLY);
1762 if (fd >= 0) {
1763 prmap_t *p = NULL;
1764 char *mbuff = (char *) calloc(read_chunk, sizeof(prmap_t));
1765 if (NULL == mbuff) {
1766 ::close(fd);
1767 return status;
1768 }
1769 while ((ret = ::read(fd, mbuff, read_chunk*sizeof(prmap_t))) > 0) {
1770 //check if read() has not read partial data
1771 if( 0 != ret % sizeof(prmap_t)){
1772 break;
1773 }
1774 nmap = ret / sizeof(prmap_t);
1775 p = (prmap_t *)mbuff;
1776 for(int i = 0; i < nmap; i++){
1777 if (p->pr_vaddr == 0x0) {
1778 st->print("Warning: Address: " PTR_FORMAT ", Size: " SIZE_FORMAT "K, ",p->pr_vaddr, p->pr_size/1024);
1779 st->print("Mapped file: %s, ", p->pr_mapname[0] == '\0' ? "None" : p->pr_mapname);
1780 st->print("Access: ");
1781 st->print("%s",(p->pr_mflags & MA_READ) ? "r" : "-");
1782 st->print("%s",(p->pr_mflags & MA_WRITE) ? "w" : "-");
1783 st->print("%s",(p->pr_mflags & MA_EXEC) ? "x" : "-");
1784 st->cr();
1785 status = true;
1786 }
1787 p++;
1788 }
1789 }
1790 free(mbuff);
1791 ::close(fd);
1792 }
1793 return status;
1794 }
1795
1796 void os::get_summary_cpu_info(char* buf, size_t buflen) {
1797 // Get MHz with system call. We don't seem to already have this.
1798 processor_info_t stats;
1799 processorid_t id = getcpuid();
1800 int clock = 0;
1801 if (processor_info(id, &stats) != -1) {
1802 clock = stats.pi_clock; // pi_processor_type isn't more informative than below
1803 }
1804 #ifdef AMD64
1805 snprintf(buf, buflen, "x86 64 bit %d MHz", clock);
1806 #else
1807 // must be sparc
1808 snprintf(buf, buflen, "Sparcv9 64 bit %d MHz", clock);
1809 #endif
1810 }
1811
1812 void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) {
1813 // Nothing to do for now.
1814 }
1815
1816 void os::print_memory_info(outputStream* st) {
1817 st->print("Memory:");
1818 st->print(" %dk page", os::vm_page_size()>>10);
1819 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
1820 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
1821 st->cr();
1822 (void) check_addr0(st);
1823 }
1824
1825 // Moved from whole group, because we need them here for diagnostic
1826 // prints.
1827 static int Maxsignum = 0;
1828 static int *ourSigFlags = NULL;
1829
1830 int os::Solaris::get_our_sigflags(int sig) {
1831 assert(ourSigFlags!=NULL, "signal data structure not initialized");
1832 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
1833 return ourSigFlags[sig];
1834 }
1835
1836 void os::Solaris::set_our_sigflags(int sig, int flags) {
1837 assert(ourSigFlags!=NULL, "signal data structure not initialized");
1838 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
1839 ourSigFlags[sig] = flags;
1840 }
1841
1842
1843 static const char* get_signal_handler_name(address handler,
1844 char* buf, int buflen) {
1845 int offset;
1846 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
1847 if (found) {
1848 // skip directory names
1849 const char *p1, *p2;
1850 p1 = buf;
1851 size_t len = strlen(os::file_separator());
1852 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
1853 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
1854 } else {
1855 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
1856 }
1857 return buf;
1858 }
1859
1860 static void print_signal_handler(outputStream* st, int sig,
1861 char* buf, size_t buflen) {
1862 struct sigaction sa;
1863
1864 sigaction(sig, NULL, &sa);
1865
1866 st->print("%s: ", os::exception_name(sig, buf, buflen));
1867
1868 address handler = (sa.sa_flags & SA_SIGINFO)
1869 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
1870 : CAST_FROM_FN_PTR(address, sa.sa_handler);
1871
1872 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
1873 st->print("SIG_DFL");
1874 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
1875 st->print("SIG_IGN");
1876 } else {
1877 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
1878 }
1879
1880 st->print(", sa_mask[0]=");
1881 os::Posix::print_signal_set_short(st, &sa.sa_mask);
1882
1883 address rh = VMError::get_resetted_sighandler(sig);
1884 // May be, handler was resetted by VMError?
1885 if (rh != NULL) {
1886 handler = rh;
1887 sa.sa_flags = VMError::get_resetted_sigflags(sig);
1888 }
1889
1890 st->print(", sa_flags=");
1891 os::Posix::print_sa_flags(st, sa.sa_flags);
1892
1893 // Check: is it our handler?
1894 if (handler == CAST_FROM_FN_PTR(address, signalHandler)) {
1895 // It is our signal handler
1896 // check for flags
1897 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
1898 st->print(
1899 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
1900 os::Solaris::get_our_sigflags(sig));
1901 }
1902 }
1903 st->cr();
1904 }
1905
1906 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
1907 st->print_cr("Signal Handlers:");
1908 print_signal_handler(st, SIGSEGV, buf, buflen);
1909 print_signal_handler(st, SIGBUS , buf, buflen);
1910 print_signal_handler(st, SIGFPE , buf, buflen);
1911 print_signal_handler(st, SIGPIPE, buf, buflen);
1912 print_signal_handler(st, SIGXFSZ, buf, buflen);
1913 print_signal_handler(st, SIGILL , buf, buflen);
1914 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
1915 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
1916 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
1917 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
1918 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
1919 }
1920
1921 static char saved_jvm_path[MAXPATHLEN] = { 0 };
1922
1923 // Find the full path to the current module, libjvm.so
1924 void os::jvm_path(char *buf, jint buflen) {
1925 // Error checking.
1926 if (buflen < MAXPATHLEN) {
1927 assert(false, "must use a large-enough buffer");
1928 buf[0] = '\0';
1929 return;
1930 }
1931 // Lazy resolve the path to current module.
1932 if (saved_jvm_path[0] != 0) {
1933 strcpy(buf, saved_jvm_path);
1934 return;
1935 }
1936
1937 Dl_info dlinfo;
1938 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
1939 assert(ret != 0, "cannot locate libjvm");
1940 if (ret != 0 && dlinfo.dli_fname != NULL) {
1941 if (os::Posix::realpath((char *)dlinfo.dli_fname, buf, buflen) == NULL) {
1942 return;
1943 }
1944 } else {
1945 buf[0] = '\0';
1946 return;
1947 }
1948
1949 if (Arguments::sun_java_launcher_is_altjvm()) {
1950 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical
1951 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".
1952 // If "/jre/lib/" appears at the right place in the string, then
1953 // assume we are installed in a JDK and we're done. Otherwise, check
1954 // for a JAVA_HOME environment variable and fix up the path so it
1955 // looks like libjvm.so is installed there (append a fake suffix
1956 // hotspot/libjvm.so).
1957 const char *p = buf + strlen(buf) - 1;
1958 for (int count = 0; p > buf && count < 5; ++count) {
1959 for (--p; p > buf && *p != '/'; --p)
1960 /* empty */ ;
1961 }
1962
1963 if (strncmp(p, "/jre/lib/", 9) != 0) {
1964 // Look for JAVA_HOME in the environment.
1965 char* java_home_var = ::getenv("JAVA_HOME");
1966 if (java_home_var != NULL && java_home_var[0] != 0) {
1967 char* jrelib_p;
1968 int len;
1969
1970 // Check the current module name "libjvm.so".
1971 p = strrchr(buf, '/');
1972 assert(strstr(p, "/libjvm") == p, "invalid library name");
1973
1974 if (os::Posix::realpath(java_home_var, buf, buflen) == NULL) {
1975 return;
1976 }
1977 // determine if this is a legacy image or modules image
1978 // modules image doesn't have "jre" subdirectory
1979 len = strlen(buf);
1980 assert(len < buflen, "Ran out of buffer space");
1981 jrelib_p = buf + len;
1982 snprintf(jrelib_p, buflen-len, "/jre/lib");
1983 if (0 != access(buf, F_OK)) {
1984 snprintf(jrelib_p, buflen-len, "/lib");
1985 }
1986
1987 if (0 == access(buf, F_OK)) {
1988 // Use current module name "libjvm.so"
1989 len = strlen(buf);
1990 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
1991 } else {
1992 // Go back to path of .so
1993 if (os::Posix::realpath((char *)dlinfo.dli_fname, buf, buflen) == NULL) {
1994 return;
1995 }
1996 }
1997 }
1998 }
1999 }
2000
2001 strncpy(saved_jvm_path, buf, MAXPATHLEN);
2002 saved_jvm_path[MAXPATHLEN - 1] = '\0';
2003 }
2004
2005
2006 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2007 // no prefix required, not even "_"
2008 }
2009
2010
2011 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2012 // no suffix required
2013 }
2014
2015 // This method is a copy of JDK's sysGetLastErrorString
2016 // from src/solaris/hpi/src/system_md.c
2017
2018 size_t os::lasterror(char *buf, size_t len) {
2019 if (errno == 0) return 0;
2020
2021 const char *s = os::strerror(errno);
2022 size_t n = ::strlen(s);
2023 if (n >= len) {
2024 n = len - 1;
2025 }
2026 ::strncpy(buf, s, n);
2027 buf[n] = '\0';
2028 return n;
2029 }
2030
2031
2032 // sun.misc.Signal
2033
2034 extern "C" {
2035 static void UserHandler(int sig, void *siginfo, void *context) {
2036 // Ctrl-C is pressed during error reporting, likely because the error
2037 // handler fails to abort. Let VM die immediately.
2038 if (sig == SIGINT && VMError::is_error_reported()) {
2039 os::die();
2040 }
2041
2042 os::signal_notify(sig);
2043 // We do not need to reinstate the signal handler each time...
2044 }
2045 }
2046
2047 void* os::user_handler() {
2048 return CAST_FROM_FN_PTR(void*, UserHandler);
2049 }
2050
2051 static struct timespec create_semaphore_timespec(unsigned int sec, int nsec) {
2052 struct timespec ts;
2053 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec);
2054
2055 return ts;
2056 }
2057
2058 extern "C" {
2059 typedef void (*sa_handler_t)(int);
2060 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2061 }
2062
2063 void* os::signal(int signal_number, void* handler) {
2064 struct sigaction sigAct, oldSigAct;
2065 sigfillset(&(sigAct.sa_mask));
2066 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2067 sigAct.sa_flags |= SA_SIGINFO;
2068 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2069
2070 if (sigaction(signal_number, &sigAct, &oldSigAct)) {
2071 // -1 means registration failed
2072 return (void *)-1;
2073 }
2074
2075 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2076 }
2077
2078 void os::signal_raise(int signal_number) {
2079 raise(signal_number);
2080 }
2081
2082 // The following code is moved from os.cpp for making this
2083 // code platform specific, which it is by its very nature.
2084
2085 // a counter for each possible signal value
2086 static int Sigexit = 0;
2087 static jint *pending_signals = NULL;
2088 static int *preinstalled_sigs = NULL;
2089 static struct sigaction *chainedsigactions = NULL;
2090 static Semaphore* sig_sem = NULL;
2091
2092 int os::sigexitnum_pd() {
2093 assert(Sigexit > 0, "signal memory not yet initialized");
2094 return Sigexit;
2095 }
2096
2097 void os::Solaris::init_signal_mem() {
2098 // Initialize signal structures
2099 Maxsignum = SIGRTMAX;
2100 Sigexit = Maxsignum+1;
2101 assert(Maxsignum >0, "Unable to obtain max signal number");
2102
2103 // Initialize signal structures
2104 // pending_signals has one int per signal
2105 // The additional signal is for SIGEXIT - exit signal to signal_thread
2106 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2107 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2108
2109 if (UseSignalChaining) {
2110 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2111 * (Maxsignum + 1), mtInternal);
2112 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2113 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2114 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2115 }
2116 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2117 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2118 }
2119
2120 static void jdk_misc_signal_init() {
2121 // Initialize signal semaphore
2122 sig_sem = new Semaphore();
2123 }
2124
2125 void os::signal_notify(int sig) {
2126 if (sig_sem != NULL) {
2127 Atomic::inc(&pending_signals[sig]);
2128 sig_sem->signal();
2129 } else {
2130 // Signal thread is not created with ReduceSignalUsage and jdk_misc_signal_init
2131 // initialization isn't called.
2132 assert(ReduceSignalUsage, "signal semaphore should be created");
2133 }
2134 }
2135
2136 static int check_pending_signals() {
2137 int ret;
2138 while (true) {
2139 for (int i = 0; i < Sigexit + 1; i++) {
2140 jint n = pending_signals[i];
2141 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2142 return i;
2143 }
2144 }
2145 JavaThread *thread = JavaThread::current();
2146 ThreadBlockInVM tbivm(thread);
2147
2148 bool threadIsSuspended;
2149 do {
2150 thread->set_suspend_equivalent();
2151 sig_sem->wait();
2152
2153 // were we externally suspended while we were waiting?
2154 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2155 if (threadIsSuspended) {
2156 // The semaphore has been incremented, but while we were waiting
2157 // another thread suspended us. We don't want to continue running
2158 // while suspended because that would surprise the thread that
2159 // suspended us.
2160 sig_sem->signal();
2161
2162 thread->java_suspend_self();
2163 }
2164 } while (threadIsSuspended);
2165 }
2166 }
2167
2168 int os::signal_wait() {
2169 return check_pending_signals();
2170 }
2171
2172 ////////////////////////////////////////////////////////////////////////////////
2173 // Virtual Memory
2174
2175 static int page_size = -1;
2176
2177 int os::vm_page_size() {
2178 assert(page_size != -1, "must call os::init");
2179 return page_size;
2180 }
2181
2182 // Solaris allocates memory by pages.
2183 int os::vm_allocation_granularity() {
2184 assert(page_size != -1, "must call os::init");
2185 return page_size;
2186 }
2187
2188 static bool recoverable_mmap_error(int err) {
2189 // See if the error is one we can let the caller handle. This
2190 // list of errno values comes from the Solaris mmap(2) man page.
2191 switch (err) {
2192 case EBADF:
2193 case EINVAL:
2194 case ENOTSUP:
2195 // let the caller deal with these errors
2196 return true;
2197
2198 default:
2199 // Any remaining errors on this OS can cause our reserved mapping
2200 // to be lost. That can cause confusion where different data
2201 // structures think they have the same memory mapped. The worst
2202 // scenario is if both the VM and a library think they have the
2203 // same memory mapped.
2204 return false;
2205 }
2206 }
2207
2208 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec,
2209 int err) {
2210 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2211 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec,
2212 os::strerror(err), err);
2213 }
2214
2215 static void warn_fail_commit_memory(char* addr, size_t bytes,
2216 size_t alignment_hint, bool exec,
2217 int err) {
2218 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2219 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes,
2220 alignment_hint, exec, os::strerror(err), err);
2221 }
2222
2223 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) {
2224 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2225 size_t size = bytes;
2226 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2227 if (res != NULL) {
2228 if (UseNUMAInterleaving) {
2229 numa_make_global(addr, bytes);
2230 }
2231 return 0;
2232 }
2233
2234 int err = errno; // save errno from mmap() call in mmap_chunk()
2235
2236 if (!recoverable_mmap_error(err)) {
2237 warn_fail_commit_memory(addr, bytes, exec, err);
2238 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory.");
2239 }
2240
2241 return err;
2242 }
2243
2244 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2245 return Solaris::commit_memory_impl(addr, bytes, exec) == 0;
2246 }
2247
2248 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec,
2249 const char* mesg) {
2250 assert(mesg != NULL, "mesg must be specified");
2251 int err = os::Solaris::commit_memory_impl(addr, bytes, exec);
2252 if (err != 0) {
2253 // the caller wants all commit errors to exit with the specified mesg:
2254 warn_fail_commit_memory(addr, bytes, exec, err);
2255 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg);
2256 }
2257 }
2258
2259 size_t os::Solaris::page_size_for_alignment(size_t alignment) {
2260 assert(is_aligned(alignment, (size_t) vm_page_size()),
2261 SIZE_FORMAT " is not aligned to " SIZE_FORMAT,
2262 alignment, (size_t) vm_page_size());
2263
2264 for (int i = 0; _page_sizes[i] != 0; i++) {
2265 if (is_aligned(alignment, _page_sizes[i])) {
2266 return _page_sizes[i];
2267 }
2268 }
2269
2270 return (size_t) vm_page_size();
2271 }
2272
2273 int os::Solaris::commit_memory_impl(char* addr, size_t bytes,
2274 size_t alignment_hint, bool exec) {
2275 int err = Solaris::commit_memory_impl(addr, bytes, exec);
2276 if (err == 0 && UseLargePages && alignment_hint > 0) {
2277 assert(is_aligned(bytes, alignment_hint),
2278 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint);
2279
2280 // The syscall memcntl requires an exact page size (see man memcntl for details).
2281 size_t page_size = page_size_for_alignment(alignment_hint);
2282 if (page_size > (size_t) vm_page_size()) {
2283 (void)Solaris::setup_large_pages(addr, bytes, page_size);
2284 }
2285 }
2286 return err;
2287 }
2288
2289 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2290 bool exec) {
2291 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0;
2292 }
2293
2294 void os::pd_commit_memory_or_exit(char* addr, size_t bytes,
2295 size_t alignment_hint, bool exec,
2296 const char* mesg) {
2297 assert(mesg != NULL, "mesg must be specified");
2298 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec);
2299 if (err != 0) {
2300 // the caller wants all commit errors to exit with the specified mesg:
2301 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err);
2302 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg);
2303 }
2304 }
2305
2306 // Uncommit the pages in a specified region.
2307 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2308 if (madvise(addr, bytes, MADV_FREE) < 0) {
2309 debug_only(warning("MADV_FREE failed."));
2310 return;
2311 }
2312 }
2313
2314 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2315 return os::commit_memory(addr, size, !ExecMem);
2316 }
2317
2318 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2319 return os::uncommit_memory(addr, size);
2320 }
2321
2322 // Change the page size in a given range.
2323 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2324 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2325 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2326 if (UseLargePages) {
2327 size_t page_size = Solaris::page_size_for_alignment(alignment_hint);
2328 if (page_size > (size_t) vm_page_size()) {
2329 Solaris::setup_large_pages(addr, bytes, page_size);
2330 }
2331 }
2332 }
2333
2334 // Tell the OS to make the range local to the first-touching LWP
2335 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2336 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2337 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2338 debug_only(warning("MADV_ACCESS_LWP failed."));
2339 }
2340 }
2341
2342 // Tell the OS that this range would be accessed from different LWPs.
2343 void os::numa_make_global(char *addr, size_t bytes) {
2344 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2345 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2346 debug_only(warning("MADV_ACCESS_MANY failed."));
2347 }
2348 }
2349
2350 // Get the number of the locality groups.
2351 size_t os::numa_get_groups_num() {
2352 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2353 return n != -1 ? n : 1;
2354 }
2355
2356 // Get a list of leaf locality groups. A leaf lgroup is group that
2357 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2358 // board. An LWP is assigned to one of these groups upon creation.
2359 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2360 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2361 ids[0] = 0;
2362 return 1;
2363 }
2364 int result_size = 0, top = 1, bottom = 0, cur = 0;
2365 for (int k = 0; k < size; k++) {
2366 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2367 (Solaris::lgrp_id_t*)&ids[top], size - top);
2368 if (r == -1) {
2369 ids[0] = 0;
2370 return 1;
2371 }
2372 if (!r) {
2373 // That's a leaf node.
2374 assert(bottom <= cur, "Sanity check");
2375 // Check if the node has memory
2376 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2377 NULL, 0, LGRP_RSRC_MEM) > 0) {
2378 ids[bottom++] = ids[cur];
2379 }
2380 }
2381 top += r;
2382 cur++;
2383 }
2384 if (bottom == 0) {
2385 // Handle a situation, when the OS reports no memory available.
2386 // Assume UMA architecture.
2387 ids[0] = 0;
2388 return 1;
2389 }
2390 return bottom;
2391 }
2392
2393 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2394 bool os::numa_topology_changed() {
2395 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2396 if (is_stale != -1 && is_stale) {
2397 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2398 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2399 assert(c != 0, "Failure to initialize LGRP API");
2400 Solaris::set_lgrp_cookie(c);
2401 return true;
2402 }
2403 return false;
2404 }
2405
2406 // Get the group id of the current LWP.
2407 int os::numa_get_group_id() {
2408 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2409 if (lgrp_id == -1) {
2410 return 0;
2411 }
2412 const int size = os::numa_get_groups_num();
2413 int *ids = (int*)alloca(size * sizeof(int));
2414
2415 // Get the ids of all lgroups with memory; r is the count.
2416 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2417 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2418 if (r <= 0) {
2419 return 0;
2420 }
2421 return ids[os::random() % r];
2422 }
2423
2424 // Request information about the page.
2425 bool os::get_page_info(char *start, page_info* info) {
2426 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2427 uint64_t addr = (uintptr_t)start;
2428 uint64_t outdata[2];
2429 uint_t validity = 0;
2430
2431 if (meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2432 return false;
2433 }
2434
2435 info->size = 0;
2436 info->lgrp_id = -1;
2437
2438 if ((validity & 1) != 0) {
2439 if ((validity & 2) != 0) {
2440 info->lgrp_id = outdata[0];
2441 }
2442 if ((validity & 4) != 0) {
2443 info->size = outdata[1];
2444 }
2445 return true;
2446 }
2447 return false;
2448 }
2449
2450 // Scan the pages from start to end until a page different than
2451 // the one described in the info parameter is encountered.
2452 char *os::scan_pages(char *start, char* end, page_info* page_expected,
2453 page_info* page_found) {
2454 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2455 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2456 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1];
2457 uint_t validity[MAX_MEMINFO_CNT];
2458
2459 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2460 uint64_t p = (uint64_t)start;
2461 while (p < (uint64_t)end) {
2462 addrs[0] = p;
2463 size_t addrs_count = 1;
2464 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2465 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2466 addrs_count++;
2467 }
2468
2469 if (meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2470 return NULL;
2471 }
2472
2473 size_t i = 0;
2474 for (; i < addrs_count; i++) {
2475 if ((validity[i] & 1) != 0) {
2476 if ((validity[i] & 4) != 0) {
2477 if (outdata[types * i + 1] != page_expected->size) {
2478 break;
2479 }
2480 } else if (page_expected->size != 0) {
2481 break;
2482 }
2483
2484 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2485 if (outdata[types * i] != page_expected->lgrp_id) {
2486 break;
2487 }
2488 }
2489 } else {
2490 return NULL;
2491 }
2492 }
2493
2494 if (i < addrs_count) {
2495 if ((validity[i] & 2) != 0) {
2496 page_found->lgrp_id = outdata[types * i];
2497 } else {
2498 page_found->lgrp_id = -1;
2499 }
2500 if ((validity[i] & 4) != 0) {
2501 page_found->size = outdata[types * i + 1];
2502 } else {
2503 page_found->size = 0;
2504 }
2505 return (char*)addrs[i];
2506 }
2507
2508 p = addrs[addrs_count - 1] + page_size;
2509 }
2510 return end;
2511 }
2512
2513 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2514 size_t size = bytes;
2515 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2516 // uncommitted page. Otherwise, the read/write might succeed if we
2517 // have enough swap space to back the physical page.
2518 return
2519 NULL != Solaris::mmap_chunk(addr, size,
2520 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2521 PROT_NONE);
2522 }
2523
2524 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2525 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2526
2527 if (b == MAP_FAILED) {
2528 return NULL;
2529 }
2530 return b;
2531 }
2532
2533 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes,
2534 size_t alignment_hint, bool fixed) {
2535 char* addr = requested_addr;
2536 int flags = MAP_PRIVATE | MAP_NORESERVE;
2537
2538 assert(!(fixed && (alignment_hint > 0)),
2539 "alignment hint meaningless with fixed mmap");
2540
2541 if (fixed) {
2542 flags |= MAP_FIXED;
2543 } else if (alignment_hint > (size_t) vm_page_size()) {
2544 flags |= MAP_ALIGN;
2545 addr = (char*) alignment_hint;
2546 }
2547
2548 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2549 // uncommitted page. Otherwise, the read/write might succeed if we
2550 // have enough swap space to back the physical page.
2551 return mmap_chunk(addr, bytes, flags, PROT_NONE);
2552 }
2553
2554 char* os::pd_reserve_memory(size_t bytes, char* requested_addr,
2555 size_t alignment_hint) {
2556 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint,
2557 (requested_addr != NULL));
2558
2559 guarantee(requested_addr == NULL || requested_addr == addr,
2560 "OS failed to return requested mmap address.");
2561 return addr;
2562 }
2563
2564 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr, int file_desc) {
2565 assert(file_desc >= 0, "file_desc is not valid");
2566 char* result = pd_attempt_reserve_memory_at(bytes, requested_addr);
2567 if (result != NULL) {
2568 if (replace_existing_mapping_with_file_mapping(result, bytes, file_desc) == NULL) {
2569 vm_exit_during_initialization(err_msg("Error in mapping Java heap at the given filesystem directory"));
2570 }
2571 }
2572 return result;
2573 }
2574
2575 // Reserve memory at an arbitrary address, only if that area is
2576 // available (and not reserved for something else).
2577
2578 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2579 const int max_tries = 10;
2580 char* base[max_tries];
2581 size_t size[max_tries];
2582
2583 // Solaris adds a gap between mmap'ed regions. The size of the gap
2584 // is dependent on the requested size and the MMU. Our initial gap
2585 // value here is just a guess and will be corrected later.
2586 bool had_top_overlap = false;
2587 bool have_adjusted_gap = false;
2588 size_t gap = 0x400000;
2589
2590 // Assert only that the size is a multiple of the page size, since
2591 // that's all that mmap requires, and since that's all we really know
2592 // about at this low abstraction level. If we need higher alignment,
2593 // we can either pass an alignment to this method or verify alignment
2594 // in one of the methods further up the call chain. See bug 5044738.
2595 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
2596
2597 // Since snv_84, Solaris attempts to honor the address hint - see 5003415.
2598 // Give it a try, if the kernel honors the hint we can return immediately.
2599 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
2600
2601 volatile int err = errno;
2602 if (addr == requested_addr) {
2603 return addr;
2604 } else if (addr != NULL) {
2605 pd_unmap_memory(addr, bytes);
2606 }
2607
2608 if (log_is_enabled(Warning, os)) {
2609 char buf[256];
2610 buf[0] = '\0';
2611 if (addr == NULL) {
2612 jio_snprintf(buf, sizeof(buf), ": %s", os::strerror(err));
2613 }
2614 log_info(os)("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at "
2615 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT
2616 "%s", bytes, requested_addr, addr, buf);
2617 }
2618
2619 // Address hint method didn't work. Fall back to the old method.
2620 // In theory, once SNV becomes our oldest supported platform, this
2621 // code will no longer be needed.
2622 //
2623 // Repeatedly allocate blocks until the block is allocated at the
2624 // right spot. Give up after max_tries.
2625 int i;
2626 for (i = 0; i < max_tries; ++i) {
2627 base[i] = reserve_memory(bytes);
2628
2629 if (base[i] != NULL) {
2630 // Is this the block we wanted?
2631 if (base[i] == requested_addr) {
2632 size[i] = bytes;
2633 break;
2634 }
2635
2636 // check that the gap value is right
2637 if (had_top_overlap && !have_adjusted_gap) {
2638 size_t actual_gap = base[i-1] - base[i] - bytes;
2639 if (gap != actual_gap) {
2640 // adjust the gap value and retry the last 2 allocations
2641 assert(i > 0, "gap adjustment code problem");
2642 have_adjusted_gap = true; // adjust the gap only once, just in case
2643 gap = actual_gap;
2644 log_info(os)("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap);
2645 unmap_memory(base[i], bytes);
2646 unmap_memory(base[i-1], size[i-1]);
2647 i-=2;
2648 continue;
2649 }
2650 }
2651
2652 // Does this overlap the block we wanted? Give back the overlapped
2653 // parts and try again.
2654 //
2655 // There is still a bug in this code: if top_overlap == bytes,
2656 // the overlap is offset from requested region by the value of gap.
2657 // In this case giving back the overlapped part will not work,
2658 // because we'll give back the entire block at base[i] and
2659 // therefore the subsequent allocation will not generate a new gap.
2660 // This could be fixed with a new algorithm that used larger
2661 // or variable size chunks to find the requested region -
2662 // but such a change would introduce additional complications.
2663 // It's rare enough that the planets align for this bug,
2664 // so we'll just wait for a fix for 6204603/5003415 which
2665 // will provide a mmap flag to allow us to avoid this business.
2666
2667 size_t top_overlap = requested_addr + (bytes + gap) - base[i];
2668 if (top_overlap >= 0 && top_overlap < bytes) {
2669 had_top_overlap = true;
2670 unmap_memory(base[i], top_overlap);
2671 base[i] += top_overlap;
2672 size[i] = bytes - top_overlap;
2673 } else {
2674 size_t bottom_overlap = base[i] + bytes - requested_addr;
2675 if (bottom_overlap >= 0 && bottom_overlap < bytes) {
2676 if (bottom_overlap == 0) {
2677 log_info(os)("attempt_reserve_memory_at: possible alignment bug");
2678 }
2679 unmap_memory(requested_addr, bottom_overlap);
2680 size[i] = bytes - bottom_overlap;
2681 } else {
2682 size[i] = bytes;
2683 }
2684 }
2685 }
2686 }
2687
2688 // Give back the unused reserved pieces.
2689
2690 for (int j = 0; j < i; ++j) {
2691 if (base[j] != NULL) {
2692 unmap_memory(base[j], size[j]);
2693 }
2694 }
2695
2696 return (i < max_tries) ? requested_addr : NULL;
2697 }
2698
2699 bool os::pd_release_memory(char* addr, size_t bytes) {
2700 size_t size = bytes;
2701 return munmap(addr, size) == 0;
2702 }
2703
2704 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
2705 assert(addr == (char*)align_down((uintptr_t)addr, os::vm_page_size()),
2706 "addr must be page aligned");
2707 int retVal = mprotect(addr, bytes, prot);
2708 return retVal == 0;
2709 }
2710
2711 // Protect memory (Used to pass readonly pages through
2712 // JNI GetArray<type>Elements with empty arrays.)
2713 // Also, used for serialization page and for compressed oops null pointer
2714 // checking.
2715 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
2716 bool is_committed) {
2717 unsigned int p = 0;
2718 switch (prot) {
2719 case MEM_PROT_NONE: p = PROT_NONE; break;
2720 case MEM_PROT_READ: p = PROT_READ; break;
2721 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
2722 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
2723 default:
2724 ShouldNotReachHere();
2725 }
2726 // is_committed is unused.
2727 return solaris_mprotect(addr, bytes, p);
2728 }
2729
2730 // guard_memory and unguard_memory only happens within stack guard pages.
2731 // Since ISM pertains only to the heap, guard and unguard memory should not
2732 /// happen with an ISM region.
2733 bool os::guard_memory(char* addr, size_t bytes) {
2734 return solaris_mprotect(addr, bytes, PROT_NONE);
2735 }
2736
2737 bool os::unguard_memory(char* addr, size_t bytes) {
2738 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
2739 }
2740
2741 // Large page support
2742 static size_t _large_page_size = 0;
2743
2744 // Insertion sort for small arrays (descending order).
2745 static void insertion_sort_descending(size_t* array, int len) {
2746 for (int i = 0; i < len; i++) {
2747 size_t val = array[i];
2748 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
2749 size_t tmp = array[key];
2750 array[key] = array[key - 1];
2751 array[key - 1] = tmp;
2752 }
2753 }
2754 }
2755
2756 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) {
2757 const unsigned int usable_count = VM_Version::page_size_count();
2758 if (usable_count == 1) {
2759 return false;
2760 }
2761
2762 // Find the right getpagesizes interface. When solaris 11 is the minimum
2763 // build platform, getpagesizes() (without the '2') can be called directly.
2764 typedef int (*gps_t)(size_t[], int);
2765 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
2766 if (gps_func == NULL) {
2767 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
2768 if (gps_func == NULL) {
2769 if (warn) {
2770 warning("MPSS is not supported by the operating system.");
2771 }
2772 return false;
2773 }
2774 }
2775
2776 // Fill the array of page sizes.
2777 int n = (*gps_func)(_page_sizes, page_sizes_max);
2778 assert(n > 0, "Solaris bug?");
2779
2780 if (n == page_sizes_max) {
2781 // Add a sentinel value (necessary only if the array was completely filled
2782 // since it is static (zeroed at initialization)).
2783 _page_sizes[--n] = 0;
2784 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
2785 }
2786 assert(_page_sizes[n] == 0, "missing sentinel");
2787 trace_page_sizes("available page sizes", _page_sizes, n);
2788
2789 if (n == 1) return false; // Only one page size available.
2790
2791 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
2792 // select up to usable_count elements. First sort the array, find the first
2793 // acceptable value, then copy the usable sizes to the top of the array and
2794 // trim the rest. Make sure to include the default page size :-).
2795 //
2796 // A better policy could get rid of the 4M limit by taking the sizes of the
2797 // important VM memory regions (java heap and possibly the code cache) into
2798 // account.
2799 insertion_sort_descending(_page_sizes, n);
2800 const size_t size_limit =
2801 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
2802 int beg;
2803 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */;
2804 const int end = MIN2((int)usable_count, n) - 1;
2805 for (int cur = 0; cur < end; ++cur, ++beg) {
2806 _page_sizes[cur] = _page_sizes[beg];
2807 }
2808 _page_sizes[end] = vm_page_size();
2809 _page_sizes[end + 1] = 0;
2810
2811 if (_page_sizes[end] > _page_sizes[end - 1]) {
2812 // Default page size is not the smallest; sort again.
2813 insertion_sort_descending(_page_sizes, end + 1);
2814 }
2815 *page_size = _page_sizes[0];
2816
2817 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
2818 return true;
2819 }
2820
2821 void os::large_page_init() {
2822 if (UseLargePages) {
2823 // print a warning if any large page related flag is specified on command line
2824 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
2825 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
2826
2827 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
2828 }
2829 }
2830
2831 bool os::Solaris::is_valid_page_size(size_t bytes) {
2832 for (int i = 0; _page_sizes[i] != 0; i++) {
2833 if (_page_sizes[i] == bytes) {
2834 return true;
2835 }
2836 }
2837 return false;
2838 }
2839
2840 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) {
2841 assert(is_valid_page_size(align), SIZE_FORMAT " is not a valid page size", align);
2842 assert(is_aligned((void*) start, align),
2843 PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align);
2844 assert(is_aligned(bytes, align),
2845 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align);
2846
2847 // Signal to OS that we want large pages for addresses
2848 // from addr, addr + bytes
2849 struct memcntl_mha mpss_struct;
2850 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
2851 mpss_struct.mha_pagesize = align;
2852 mpss_struct.mha_flags = 0;
2853 // Upon successful completion, memcntl() returns 0
2854 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) {
2855 debug_only(warning("Attempt to use MPSS failed."));
2856 return false;
2857 }
2858 return true;
2859 }
2860
2861 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) {
2862 fatal("os::reserve_memory_special should not be called on Solaris.");
2863 return NULL;
2864 }
2865
2866 bool os::release_memory_special(char* base, size_t bytes) {
2867 fatal("os::release_memory_special should not be called on Solaris.");
2868 return false;
2869 }
2870
2871 size_t os::large_page_size() {
2872 return _large_page_size;
2873 }
2874
2875 // MPSS allows application to commit large page memory on demand; with ISM
2876 // the entire memory region must be allocated as shared memory.
2877 bool os::can_commit_large_page_memory() {
2878 return true;
2879 }
2880
2881 bool os::can_execute_large_page_memory() {
2882 return true;
2883 }
2884
2885 // Read calls from inside the vm need to perform state transitions
2886 size_t os::read(int fd, void *buf, unsigned int nBytes) {
2887 size_t res;
2888 JavaThread* thread = (JavaThread*)Thread::current();
2889 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
2890 ThreadBlockInVM tbiv(thread);
2891 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
2892 return res;
2893 }
2894
2895 size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) {
2896 size_t res;
2897 JavaThread* thread = (JavaThread*)Thread::current();
2898 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm");
2899 ThreadBlockInVM tbiv(thread);
2900 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res);
2901 return res;
2902 }
2903
2904 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
2905 size_t res;
2906 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
2907 "Assumed _thread_in_native");
2908 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res);
2909 return res;
2910 }
2911
2912 void os::naked_short_sleep(jlong ms) {
2913 assert(ms < 1000, "Un-interruptable sleep, short time use only");
2914
2915 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but
2916 // Solaris requires -lrt for this.
2917 usleep((ms * 1000));
2918
2919 return;
2920 }
2921
2922 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
2923 void os::infinite_sleep() {
2924 while (true) { // sleep forever ...
2925 ::sleep(100); // ... 100 seconds at a time
2926 }
2927 }
2928
2929 // Used to convert frequent JVM_Yield() to nops
2930 bool os::dont_yield() {
2931 if (DontYieldALot) {
2932 static hrtime_t last_time = 0;
2933 hrtime_t diff = getTimeNanos() - last_time;
2934
2935 if (diff < DontYieldALotInterval * 1000000) {
2936 return true;
2937 }
2938
2939 last_time += diff;
2940
2941 return false;
2942 } else {
2943 return false;
2944 }
2945 }
2946
2947 // Note that yield semantics are defined by the scheduling class to which
2948 // the thread currently belongs. Typically, yield will _not yield to
2949 // other equal or higher priority threads that reside on the dispatch queues
2950 // of other CPUs.
2951
2952 void os::naked_yield() {
2953 thr_yield();
2954 }
2955
2956 // Interface for setting lwp priorities. We are using T2 libthread,
2957 // which forces the use of bound threads, so all of our threads will
2958 // be assigned to real lwp's. Using the thr_setprio function is
2959 // meaningless in this mode so we must adjust the real lwp's priority.
2960 // The routines below implement the getting and setting of lwp priorities.
2961 //
2962 // Note: There are three priority scales used on Solaris. Java priotities
2963 // which range from 1 to 10, libthread "thr_setprio" scale which range
2964 // from 0 to 127, and the current scheduling class of the process we
2965 // are running in. This is typically from -60 to +60.
2966 // The setting of the lwp priorities in done after a call to thr_setprio
2967 // so Java priorities are mapped to libthread priorities and we map from
2968 // the latter to lwp priorities. We don't keep priorities stored in
2969 // Java priorities since some of our worker threads want to set priorities
2970 // higher than all Java threads.
2971 //
2972 // For related information:
2973 // (1) man -s 2 priocntl
2974 // (2) man -s 4 priocntl
2975 // (3) man dispadmin
2976 // = librt.so
2977 // = libthread/common/rtsched.c - thrp_setlwpprio().
2978 // = ps -cL <pid> ... to validate priority.
2979 // = sched_get_priority_min and _max
2980 // pthread_create
2981 // sched_setparam
2982 // pthread_setschedparam
2983 //
2984 // Assumptions:
2985 // + We assume that all threads in the process belong to the same
2986 // scheduling class. IE. an homogenous process.
2987 // + Must be root or in IA group to change change "interactive" attribute.
2988 // Priocntl() will fail silently. The only indication of failure is when
2989 // we read-back the value and notice that it hasn't changed.
2990 // + Interactive threads enter the runq at the head, non-interactive at the tail.
2991 // + For RT, change timeslice as well. Invariant:
2992 // constant "priority integral"
2993 // Konst == TimeSlice * (60-Priority)
2994 // Given a priority, compute appropriate timeslice.
2995 // + Higher numerical values have higher priority.
2996
2997 // sched class attributes
2998 typedef struct {
2999 int schedPolicy; // classID
3000 int maxPrio;
3001 int minPrio;
3002 } SchedInfo;
3003
3004
3005 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
3006
3007 #ifdef ASSERT
3008 static int ReadBackValidate = 1;
3009 #endif
3010 static int myClass = 0;
3011 static int myMin = 0;
3012 static int myMax = 0;
3013 static int myCur = 0;
3014 static bool priocntl_enable = false;
3015
3016 static const int criticalPrio = FXCriticalPriority;
3017 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
3018
3019
3020 // lwp_priocntl_init
3021 //
3022 // Try to determine the priority scale for our process.
3023 //
3024 // Return errno or 0 if OK.
3025 //
3026 static int lwp_priocntl_init() {
3027 int rslt;
3028 pcinfo_t ClassInfo;
3029 pcparms_t ParmInfo;
3030 int i;
3031
3032 if (!UseThreadPriorities) return 0;
3033
3034 // If ThreadPriorityPolicy is 1, switch tables
3035 if (ThreadPriorityPolicy == 1) {
3036 for (i = 0; i < CriticalPriority+1; i++)
3037 os::java_to_os_priority[i] = prio_policy1[i];
3038 }
3039 if (UseCriticalJavaThreadPriority) {
3040 // MaxPriority always maps to the FX scheduling class and criticalPrio.
3041 // See set_native_priority() and set_lwp_class_and_priority().
3042 // Save original MaxPriority mapping in case attempt to
3043 // use critical priority fails.
3044 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
3045 // Set negative to distinguish from other priorities
3046 os::java_to_os_priority[MaxPriority] = -criticalPrio;
3047 }
3048
3049 // Get IDs for a set of well-known scheduling classes.
3050 // TODO-FIXME: GETCLINFO returns the current # of classes in the
3051 // the system. We should have a loop that iterates over the
3052 // classID values, which are known to be "small" integers.
3053
3054 strcpy(ClassInfo.pc_clname, "TS");
3055 ClassInfo.pc_cid = -1;
3056 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3057 if (rslt < 0) return errno;
3058 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
3059 tsLimits.schedPolicy = ClassInfo.pc_cid;
3060 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
3061 tsLimits.minPrio = -tsLimits.maxPrio;
3062
3063 strcpy(ClassInfo.pc_clname, "IA");
3064 ClassInfo.pc_cid = -1;
3065 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3066 if (rslt < 0) return errno;
3067 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
3068 iaLimits.schedPolicy = ClassInfo.pc_cid;
3069 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
3070 iaLimits.minPrio = -iaLimits.maxPrio;
3071
3072 strcpy(ClassInfo.pc_clname, "RT");
3073 ClassInfo.pc_cid = -1;
3074 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3075 if (rslt < 0) return errno;
3076 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
3077 rtLimits.schedPolicy = ClassInfo.pc_cid;
3078 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
3079 rtLimits.minPrio = 0;
3080
3081 strcpy(ClassInfo.pc_clname, "FX");
3082 ClassInfo.pc_cid = -1;
3083 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
3084 if (rslt < 0) return errno;
3085 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
3086 fxLimits.schedPolicy = ClassInfo.pc_cid;
3087 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
3088 fxLimits.minPrio = 0;
3089
3090 // Query our "current" scheduling class.
3091 // This will normally be IA, TS or, rarely, FX or RT.
3092 memset(&ParmInfo, 0, sizeof(ParmInfo));
3093 ParmInfo.pc_cid = PC_CLNULL;
3094 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3095 if (rslt < 0) return errno;
3096 myClass = ParmInfo.pc_cid;
3097
3098 // We now know our scheduling classId, get specific information
3099 // about the class.
3100 ClassInfo.pc_cid = myClass;
3101 ClassInfo.pc_clname[0] = 0;
3102 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
3103 if (rslt < 0) return errno;
3104
3105 if (ThreadPriorityVerbose) {
3106 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
3107 }
3108
3109 memset(&ParmInfo, 0, sizeof(pcparms_t));
3110 ParmInfo.pc_cid = PC_CLNULL;
3111 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
3112 if (rslt < 0) return errno;
3113
3114 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3115 myMin = rtLimits.minPrio;
3116 myMax = rtLimits.maxPrio;
3117 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3118 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3119 myMin = iaLimits.minPrio;
3120 myMax = iaLimits.maxPrio;
3121 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
3122 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3123 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3124 myMin = tsLimits.minPrio;
3125 myMax = tsLimits.maxPrio;
3126 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3127 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3128 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3129 myMin = fxLimits.minPrio;
3130 myMax = fxLimits.maxPrio;
3131 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3132 } else {
3133 // No clue - punt
3134 if (ThreadPriorityVerbose) {
3135 tty->print_cr("Unknown scheduling class: %s ... \n",
3136 ClassInfo.pc_clname);
3137 }
3138 return EINVAL; // no clue, punt
3139 }
3140
3141 if (ThreadPriorityVerbose) {
3142 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax);
3143 }
3144
3145 priocntl_enable = true; // Enable changing priorities
3146 return 0;
3147 }
3148
3149 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3150 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3151 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3152 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3153
3154
3155 // scale_to_lwp_priority
3156 //
3157 // Convert from the libthread "thr_setprio" scale to our current
3158 // lwp scheduling class scale.
3159 //
3160 static int scale_to_lwp_priority(int rMin, int rMax, int x) {
3161 int v;
3162
3163 if (x == 127) return rMax; // avoid round-down
3164 v = (((x*(rMax-rMin)))/128)+rMin;
3165 return v;
3166 }
3167
3168
3169 // set_lwp_class_and_priority
3170 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3171 int newPrio, int new_class, bool scale) {
3172 int rslt;
3173 int Actual, Expected, prv;
3174 pcparms_t ParmInfo; // for GET-SET
3175 #ifdef ASSERT
3176 pcparms_t ReadBack; // for readback
3177 #endif
3178
3179 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3180 // Query current values.
3181 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3182 // Cache "pcparms_t" in global ParmCache.
3183 // TODO: elide set-to-same-value
3184
3185 // If something went wrong on init, don't change priorities.
3186 if (!priocntl_enable) {
3187 if (ThreadPriorityVerbose) {
3188 tty->print_cr("Trying to set priority but init failed, ignoring");
3189 }
3190 return EINVAL;
3191 }
3192
3193 // If lwp hasn't started yet, just return
3194 // the _start routine will call us again.
3195 if (lwpid <= 0) {
3196 if (ThreadPriorityVerbose) {
3197 tty->print_cr("deferring the set_lwp_class_and_priority of thread "
3198 INTPTR_FORMAT " to %d, lwpid not set",
3199 ThreadID, newPrio);
3200 }
3201 return 0;
3202 }
3203
3204 if (ThreadPriorityVerbose) {
3205 tty->print_cr ("set_lwp_class_and_priority("
3206 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3207 ThreadID, lwpid, newPrio);
3208 }
3209
3210 memset(&ParmInfo, 0, sizeof(pcparms_t));
3211 ParmInfo.pc_cid = PC_CLNULL;
3212 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3213 if (rslt < 0) return errno;
3214
3215 int cur_class = ParmInfo.pc_cid;
3216 ParmInfo.pc_cid = (id_t)new_class;
3217
3218 if (new_class == rtLimits.schedPolicy) {
3219 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3220 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3221 rtLimits.maxPrio, newPrio)
3222 : newPrio;
3223 rtInfo->rt_tqsecs = RT_NOCHANGE;
3224 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3225 if (ThreadPriorityVerbose) {
3226 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3227 }
3228 } else if (new_class == iaLimits.schedPolicy) {
3229 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3230 int maxClamped = MIN2(iaLimits.maxPrio,
3231 cur_class == new_class
3232 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3233 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3234 maxClamped, newPrio)
3235 : newPrio;
3236 iaInfo->ia_uprilim = cur_class == new_class
3237 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3238 iaInfo->ia_mode = IA_NOCHANGE;
3239 if (ThreadPriorityVerbose) {
3240 tty->print_cr("IA: [%d...%d] %d->%d\n",
3241 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3242 }
3243 } else if (new_class == tsLimits.schedPolicy) {
3244 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3245 int maxClamped = MIN2(tsLimits.maxPrio,
3246 cur_class == new_class
3247 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3248 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3249 maxClamped, newPrio)
3250 : newPrio;
3251 tsInfo->ts_uprilim = cur_class == new_class
3252 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3253 if (ThreadPriorityVerbose) {
3254 tty->print_cr("TS: [%d...%d] %d->%d\n",
3255 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3256 }
3257 } else if (new_class == fxLimits.schedPolicy) {
3258 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3259 int maxClamped = MIN2(fxLimits.maxPrio,
3260 cur_class == new_class
3261 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3262 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3263 maxClamped, newPrio)
3264 : newPrio;
3265 fxInfo->fx_uprilim = cur_class == new_class
3266 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
3267 fxInfo->fx_tqsecs = FX_NOCHANGE;
3268 fxInfo->fx_tqnsecs = FX_NOCHANGE;
3269 if (ThreadPriorityVerbose) {
3270 tty->print_cr("FX: [%d...%d] %d->%d\n",
3271 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
3272 }
3273 } else {
3274 if (ThreadPriorityVerbose) {
3275 tty->print_cr("Unknown new scheduling class %d\n", new_class);
3276 }
3277 return EINVAL; // no clue, punt
3278 }
3279
3280 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3281 if (ThreadPriorityVerbose && rslt) {
3282 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3283 }
3284 if (rslt < 0) return errno;
3285
3286 #ifdef ASSERT
3287 // Sanity check: read back what we just attempted to set.
3288 // In theory it could have changed in the interim ...
3289 //
3290 // The priocntl system call is tricky.
3291 // Sometimes it'll validate the priority value argument and
3292 // return EINVAL if unhappy. At other times it fails silently.
3293 // Readbacks are prudent.
3294
3295 if (!ReadBackValidate) return 0;
3296
3297 memset(&ReadBack, 0, sizeof(pcparms_t));
3298 ReadBack.pc_cid = PC_CLNULL;
3299 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3300 assert(rslt >= 0, "priocntl failed");
3301 Actual = Expected = 0xBAD;
3302 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3303 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3304 Actual = RTPRI(ReadBack)->rt_pri;
3305 Expected = RTPRI(ParmInfo)->rt_pri;
3306 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3307 Actual = IAPRI(ReadBack)->ia_upri;
3308 Expected = IAPRI(ParmInfo)->ia_upri;
3309 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3310 Actual = TSPRI(ReadBack)->ts_upri;
3311 Expected = TSPRI(ParmInfo)->ts_upri;
3312 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3313 Actual = FXPRI(ReadBack)->fx_upri;
3314 Expected = FXPRI(ParmInfo)->fx_upri;
3315 } else {
3316 if (ThreadPriorityVerbose) {
3317 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
3318 ParmInfo.pc_cid);
3319 }
3320 }
3321
3322 if (Actual != Expected) {
3323 if (ThreadPriorityVerbose) {
3324 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3325 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3326 }
3327 }
3328 #endif
3329
3330 return 0;
3331 }
3332
3333 // Solaris only gives access to 128 real priorities at a time,
3334 // so we expand Java's ten to fill this range. This would be better
3335 // if we dynamically adjusted relative priorities.
3336 //
3337 // The ThreadPriorityPolicy option allows us to select 2 different
3338 // priority scales.
3339 //
3340 // ThreadPriorityPolicy=0
3341 // Since the Solaris' default priority is MaximumPriority, we do not
3342 // set a priority lower than Max unless a priority lower than
3343 // NormPriority is requested.
3344 //
3345 // ThreadPriorityPolicy=1
3346 // This mode causes the priority table to get filled with
3347 // linear values. NormPriority get's mapped to 50% of the
3348 // Maximum priority an so on. This will cause VM threads
3349 // to get unfair treatment against other Solaris processes
3350 // which do not explicitly alter their thread priorities.
3351
3352 int os::java_to_os_priority[CriticalPriority + 1] = {
3353 -99999, // 0 Entry should never be used
3354
3355 0, // 1 MinPriority
3356 32, // 2
3357 64, // 3
3358
3359 96, // 4
3360 127, // 5 NormPriority
3361 127, // 6
3362
3363 127, // 7
3364 127, // 8
3365 127, // 9 NearMaxPriority
3366
3367 127, // 10 MaxPriority
3368
3369 -criticalPrio // 11 CriticalPriority
3370 };
3371
3372 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3373 OSThread* osthread = thread->osthread();
3374
3375 // Save requested priority in case the thread hasn't been started
3376 osthread->set_native_priority(newpri);
3377
3378 // Check for critical priority request
3379 bool fxcritical = false;
3380 if (newpri == -criticalPrio) {
3381 fxcritical = true;
3382 newpri = criticalPrio;
3383 }
3384
3385 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3386 if (!UseThreadPriorities) return OS_OK;
3387
3388 int status = 0;
3389
3390 if (!fxcritical) {
3391 // Use thr_setprio only if we have a priority that thr_setprio understands
3392 status = thr_setprio(thread->osthread()->thread_id(), newpri);
3393 }
3394
3395 int lwp_status =
3396 set_lwp_class_and_priority(osthread->thread_id(),
3397 osthread->lwp_id(),
3398 newpri,
3399 fxcritical ? fxLimits.schedPolicy : myClass,
3400 !fxcritical);
3401 if (lwp_status != 0 && fxcritical) {
3402 // Try again, this time without changing the scheduling class
3403 newpri = java_MaxPriority_to_os_priority;
3404 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
3405 osthread->lwp_id(),
3406 newpri, myClass, false);
3407 }
3408 status |= lwp_status;
3409 return (status == 0) ? OS_OK : OS_ERR;
3410 }
3411
3412
3413 OSReturn os::get_native_priority(const Thread* const thread,
3414 int *priority_ptr) {
3415 int p;
3416 if (!UseThreadPriorities) {
3417 *priority_ptr = NormalPriority;
3418 return OS_OK;
3419 }
3420 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3421 if (status != 0) {
3422 return OS_ERR;
3423 }
3424 *priority_ptr = p;
3425 return OS_OK;
3426 }
3427
3428
3429 // Hint to the underlying OS that a task switch would not be good.
3430 // Void return because it's a hint and can fail.
3431 void os::hint_no_preempt() {
3432 schedctl_start(schedctl_init());
3433 }
3434
3435 ////////////////////////////////////////////////////////////////////////////////
3436 // suspend/resume support
3437
3438 // The low-level signal-based suspend/resume support is a remnant from the
3439 // old VM-suspension that used to be for java-suspension, safepoints etc,
3440 // within hotspot. Currently used by JFR's OSThreadSampler
3441 //
3442 // The remaining code is greatly simplified from the more general suspension
3443 // code that used to be used.
3444 //
3445 // The protocol is quite simple:
3446 // - suspend:
3447 // - sends a signal to the target thread
3448 // - polls the suspend state of the osthread using a yield loop
3449 // - target thread signal handler (SR_handler) sets suspend state
3450 // and blocks in sigsuspend until continued
3451 // - resume:
3452 // - sets target osthread state to continue
3453 // - sends signal to end the sigsuspend loop in the SR_handler
3454 //
3455 // Note that the SR_lock plays no role in this suspend/resume protocol,
3456 // but is checked for NULL in SR_handler as a thread termination indicator.
3457 // The SR_lock is, however, used by JavaThread::java_suspend()/java_resume() APIs.
3458 //
3459 // Note that resume_clear_context() and suspend_save_context() are needed
3460 // by SR_handler(), so that fetch_frame_from_ucontext() works,
3461 // which in part is used by:
3462 // - Forte Analyzer: AsyncGetCallTrace()
3463 // - StackBanging: get_frame_at_stack_banging_point()
3464 // - JFR: get_topframe()-->....-->get_valid_uc_in_signal_handler()
3465
3466 static void resume_clear_context(OSThread *osthread) {
3467 osthread->set_ucontext(NULL);
3468 }
3469
3470 static void suspend_save_context(OSThread *osthread, ucontext_t* context) {
3471 osthread->set_ucontext(context);
3472 }
3473
3474 static PosixSemaphore sr_semaphore;
3475
3476 void os::Solaris::SR_handler(Thread* thread, ucontext_t* context) {
3477 // Save and restore errno to avoid confusing native code with EINTR
3478 // after sigsuspend.
3479 int old_errno = errno;
3480
3481 OSThread* osthread = thread->osthread();
3482 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
3483
3484 os::SuspendResume::State current = osthread->sr.state();
3485 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
3486 suspend_save_context(osthread, context);
3487
3488 // attempt to switch the state, we assume we had a SUSPEND_REQUEST
3489 os::SuspendResume::State state = osthread->sr.suspended();
3490 if (state == os::SuspendResume::SR_SUSPENDED) {
3491 sigset_t suspend_set; // signals for sigsuspend()
3492
3493 // get current set of blocked signals and unblock resume signal
3494 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set);
3495 sigdelset(&suspend_set, ASYNC_SIGNAL);
3496
3497 sr_semaphore.signal();
3498 // wait here until we are resumed
3499 while (1) {
3500 sigsuspend(&suspend_set);
3501
3502 os::SuspendResume::State result = osthread->sr.running();
3503 if (result == os::SuspendResume::SR_RUNNING) {
3504 sr_semaphore.signal();
3505 break;
3506 }
3507 }
3508
3509 } else if (state == os::SuspendResume::SR_RUNNING) {
3510 // request was cancelled, continue
3511 } else {
3512 ShouldNotReachHere();
3513 }
3514
3515 resume_clear_context(osthread);
3516 } else if (current == os::SuspendResume::SR_RUNNING) {
3517 // request was cancelled, continue
3518 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
3519 // ignore
3520 } else {
3521 // ignore
3522 }
3523
3524 errno = old_errno;
3525 }
3526
3527 void os::print_statistics() {
3528 }
3529
3530 bool os::message_box(const char* title, const char* message) {
3531 int i;
3532 fdStream err(defaultStream::error_fd());
3533 for (i = 0; i < 78; i++) err.print_raw("=");
3534 err.cr();
3535 err.print_raw_cr(title);
3536 for (i = 0; i < 78; i++) err.print_raw("-");
3537 err.cr();
3538 err.print_raw_cr(message);
3539 for (i = 0; i < 78; i++) err.print_raw("=");
3540 err.cr();
3541
3542 char buf[16];
3543 // Prevent process from exiting upon "read error" without consuming all CPU
3544 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3545
3546 return buf[0] == 'y' || buf[0] == 'Y';
3547 }
3548
3549 static int sr_notify(OSThread* osthread) {
3550 int status = thr_kill(osthread->thread_id(), ASYNC_SIGNAL);
3551 assert_status(status == 0, status, "thr_kill");
3552 return status;
3553 }
3554
3555 // "Randomly" selected value for how long we want to spin
3556 // before bailing out on suspending a thread, also how often
3557 // we send a signal to a thread we want to resume
3558 static const int RANDOMLY_LARGE_INTEGER = 1000000;
3559 static const int RANDOMLY_LARGE_INTEGER2 = 100;
3560
3561 static bool do_suspend(OSThread* osthread) {
3562 assert(osthread->sr.is_running(), "thread should be running");
3563 assert(!sr_semaphore.trywait(), "semaphore has invalid state");
3564
3565 // mark as suspended and send signal
3566 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
3567 // failed to switch, state wasn't running?
3568 ShouldNotReachHere();
3569 return false;
3570 }
3571
3572 if (sr_notify(osthread) != 0) {
3573 ShouldNotReachHere();
3574 }
3575
3576 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
3577 while (true) {
3578 if (sr_semaphore.timedwait(create_semaphore_timespec(0, 2000 * NANOSECS_PER_MILLISEC))) {
3579 break;
3580 } else {
3581 // timeout
3582 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
3583 if (cancelled == os::SuspendResume::SR_RUNNING) {
3584 return false;
3585 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
3586 // make sure that we consume the signal on the semaphore as well
3587 sr_semaphore.wait();
3588 break;
3589 } else {
3590 ShouldNotReachHere();
3591 return false;
3592 }
3593 }
3594 }
3595
3596 guarantee(osthread->sr.is_suspended(), "Must be suspended");
3597 return true;
3598 }
3599
3600 static void do_resume(OSThread* osthread) {
3601 assert(osthread->sr.is_suspended(), "thread should be suspended");
3602 assert(!sr_semaphore.trywait(), "invalid semaphore state");
3603
3604 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
3605 // failed to switch to WAKEUP_REQUEST
3606 ShouldNotReachHere();
3607 return;
3608 }
3609
3610 while (true) {
3611 if (sr_notify(osthread) == 0) {
3612 if (sr_semaphore.timedwait(create_semaphore_timespec(0, 2 * NANOSECS_PER_MILLISEC))) {
3613 if (osthread->sr.is_running()) {
3614 return;
3615 }
3616 }
3617 } else {
3618 ShouldNotReachHere();
3619 }
3620 }
3621
3622 guarantee(osthread->sr.is_running(), "Must be running!");
3623 }
3624
3625 void os::SuspendedThreadTask::internal_do_task() {
3626 if (do_suspend(_thread->osthread())) {
3627 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
3628 do_task(context);
3629 do_resume(_thread->osthread());
3630 }
3631 }
3632
3633 // This does not do anything on Solaris. This is basically a hook for being
3634 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
3635 void os::os_exception_wrapper(java_call_t f, JavaValue* value,
3636 const methodHandle& method, JavaCallArguments* args,
3637 Thread* thread) {
3638 f(value, method, args, thread);
3639 }
3640
3641 // This routine may be used by user applications as a "hook" to catch signals.
3642 // The user-defined signal handler must pass unrecognized signals to this
3643 // routine, and if it returns true (non-zero), then the signal handler must
3644 // return immediately. If the flag "abort_if_unrecognized" is true, then this
3645 // routine will never retun false (zero), but instead will execute a VM panic
3646 // routine kill the process.
3647 //
3648 // If this routine returns false, it is OK to call it again. This allows
3649 // the user-defined signal handler to perform checks either before or after
3650 // the VM performs its own checks. Naturally, the user code would be making
3651 // a serious error if it tried to handle an exception (such as a null check
3652 // or breakpoint) that the VM was generating for its own correct operation.
3653 //
3654 // This routine may recognize any of the following kinds of signals:
3655 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
3656 // ASYNC_SIGNAL.
3657 // It should be consulted by handlers for any of those signals.
3658 //
3659 // The caller of this routine must pass in the three arguments supplied
3660 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
3661 // field of the structure passed to sigaction(). This routine assumes that
3662 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
3663 //
3664 // Note that the VM will print warnings if it detects conflicting signal
3665 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
3666 //
3667 extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo,
3668 siginfo_t* siginfo,
3669 void* ucontext,
3670 int abort_if_unrecognized);
3671
3672
3673 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
3674 int orig_errno = errno; // Preserve errno value over signal handler.
3675 JVM_handle_solaris_signal(sig, info, ucVoid, true);
3676 errno = orig_errno;
3677 }
3678
3679 // This boolean allows users to forward their own non-matching signals
3680 // to JVM_handle_solaris_signal, harmlessly.
3681 bool os::Solaris::signal_handlers_are_installed = false;
3682
3683 // For signal-chaining
3684 bool os::Solaris::libjsig_is_loaded = false;
3685 typedef struct sigaction *(*get_signal_t)(int);
3686 get_signal_t os::Solaris::get_signal_action = NULL;
3687
3688 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
3689 struct sigaction *actp = NULL;
3690
3691 if ((libjsig_is_loaded) && (sig <= Maxsignum)) {
3692 // Retrieve the old signal handler from libjsig
3693 actp = (*get_signal_action)(sig);
3694 }
3695 if (actp == NULL) {
3696 // Retrieve the preinstalled signal handler from jvm
3697 actp = get_preinstalled_handler(sig);
3698 }
3699
3700 return actp;
3701 }
3702
3703 static bool call_chained_handler(struct sigaction *actp, int sig,
3704 siginfo_t *siginfo, void *context) {
3705 // Call the old signal handler
3706 if (actp->sa_handler == SIG_DFL) {
3707 // It's more reasonable to let jvm treat it as an unexpected exception
3708 // instead of taking the default action.
3709 return false;
3710 } else if (actp->sa_handler != SIG_IGN) {
3711 if ((actp->sa_flags & SA_NODEFER) == 0) {
3712 // automaticlly block the signal
3713 sigaddset(&(actp->sa_mask), sig);
3714 }
3715
3716 sa_handler_t hand;
3717 sa_sigaction_t sa;
3718 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
3719 // retrieve the chained handler
3720 if (siginfo_flag_set) {
3721 sa = actp->sa_sigaction;
3722 } else {
3723 hand = actp->sa_handler;
3724 }
3725
3726 if ((actp->sa_flags & SA_RESETHAND) != 0) {
3727 actp->sa_handler = SIG_DFL;
3728 }
3729
3730 // try to honor the signal mask
3731 sigset_t oset;
3732 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset);
3733
3734 // call into the chained handler
3735 if (siginfo_flag_set) {
3736 (*sa)(sig, siginfo, context);
3737 } else {
3738 (*hand)(sig);
3739 }
3740
3741 // restore the signal mask
3742 pthread_sigmask(SIG_SETMASK, &oset, 0);
3743 }
3744 // Tell jvm's signal handler the signal is taken care of.
3745 return true;
3746 }
3747
3748 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
3749 bool chained = false;
3750 // signal-chaining
3751 if (UseSignalChaining) {
3752 struct sigaction *actp = get_chained_signal_action(sig);
3753 if (actp != NULL) {
3754 chained = call_chained_handler(actp, sig, siginfo, context);
3755 }
3756 }
3757 return chained;
3758 }
3759
3760 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
3761 assert((chainedsigactions != (struct sigaction *)NULL) &&
3762 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
3763 if (preinstalled_sigs[sig] != 0) {
3764 return &chainedsigactions[sig];
3765 }
3766 return NULL;
3767 }
3768
3769 void os::Solaris::save_preinstalled_handler(int sig,
3770 struct sigaction& oldAct) {
3771 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
3772 assert((chainedsigactions != (struct sigaction *)NULL) &&
3773 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
3774 chainedsigactions[sig] = oldAct;
3775 preinstalled_sigs[sig] = 1;
3776 }
3777
3778 void os::Solaris::set_signal_handler(int sig, bool set_installed,
3779 bool oktochain) {
3780 // Check for overwrite.
3781 struct sigaction oldAct;
3782 sigaction(sig, (struct sigaction*)NULL, &oldAct);
3783 void* oldhand =
3784 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
3785 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
3786 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
3787 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
3788 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
3789 if (AllowUserSignalHandlers || !set_installed) {
3790 // Do not overwrite; user takes responsibility to forward to us.
3791 return;
3792 } else if (UseSignalChaining) {
3793 if (oktochain) {
3794 // save the old handler in jvm
3795 save_preinstalled_handler(sig, oldAct);
3796 } else {
3797 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal.");
3798 }
3799 // libjsig also interposes the sigaction() call below and saves the
3800 // old sigaction on it own.
3801 } else {
3802 fatal("Encountered unexpected pre-existing sigaction handler "
3803 "%#lx for signal %d.", (long)oldhand, sig);
3804 }
3805 }
3806
3807 struct sigaction sigAct;
3808 sigfillset(&(sigAct.sa_mask));
3809 sigAct.sa_handler = SIG_DFL;
3810
3811 sigAct.sa_sigaction = signalHandler;
3812 // Handle SIGSEGV on alternate signal stack if
3813 // not using stack banging
3814 if (!UseStackBanging && sig == SIGSEGV) {
3815 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
3816 } else {
3817 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
3818 }
3819 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
3820
3821 sigaction(sig, &sigAct, &oldAct);
3822
3823 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
3824 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
3825 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
3826 }
3827
3828
3829 #define DO_SIGNAL_CHECK(sig) \
3830 do { \
3831 if (!sigismember(&check_signal_done, sig)) { \
3832 os::Solaris::check_signal_handler(sig); \
3833 } \
3834 } while (0)
3835
3836 // This method is a periodic task to check for misbehaving JNI applications
3837 // under CheckJNI, we can add any periodic checks here
3838
3839 void os::run_periodic_checks() {
3840 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
3841 // thereby preventing a NULL checks.
3842 if (!check_addr0_done) check_addr0_done = check_addr0(tty);
3843
3844 if (check_signals == false) return;
3845
3846 // SEGV and BUS if overridden could potentially prevent
3847 // generation of hs*.log in the event of a crash, debugging
3848 // such a case can be very challenging, so we absolutely
3849 // check for the following for a good measure:
3850 DO_SIGNAL_CHECK(SIGSEGV);
3851 DO_SIGNAL_CHECK(SIGILL);
3852 DO_SIGNAL_CHECK(SIGFPE);
3853 DO_SIGNAL_CHECK(SIGBUS);
3854 DO_SIGNAL_CHECK(SIGPIPE);
3855 DO_SIGNAL_CHECK(SIGXFSZ);
3856 DO_SIGNAL_CHECK(ASYNC_SIGNAL);
3857
3858 // ReduceSignalUsage allows the user to override these handlers
3859 // see comments at the very top and jvm_solaris.h
3860 if (!ReduceSignalUsage) {
3861 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
3862 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
3863 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
3864 DO_SIGNAL_CHECK(BREAK_SIGNAL);
3865 }
3866 }
3867
3868 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
3869
3870 static os_sigaction_t os_sigaction = NULL;
3871
3872 void os::Solaris::check_signal_handler(int sig) {
3873 char buf[O_BUFLEN];
3874 address jvmHandler = NULL;
3875
3876 struct sigaction act;
3877 if (os_sigaction == NULL) {
3878 // only trust the default sigaction, in case it has been interposed
3879 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
3880 if (os_sigaction == NULL) return;
3881 }
3882
3883 os_sigaction(sig, (struct sigaction*)NULL, &act);
3884
3885 address thisHandler = (act.sa_flags & SA_SIGINFO)
3886 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
3887 : CAST_FROM_FN_PTR(address, act.sa_handler);
3888
3889
3890 switch (sig) {
3891 case SIGSEGV:
3892 case SIGBUS:
3893 case SIGFPE:
3894 case SIGPIPE:
3895 case SIGXFSZ:
3896 case SIGILL:
3897 case ASYNC_SIGNAL:
3898 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
3899 break;
3900
3901 case SHUTDOWN1_SIGNAL:
3902 case SHUTDOWN2_SIGNAL:
3903 case SHUTDOWN3_SIGNAL:
3904 case BREAK_SIGNAL:
3905 jvmHandler = (address)user_handler();
3906 break;
3907
3908 default:
3909 return;
3910 }
3911
3912 if (thisHandler != jvmHandler) {
3913 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
3914 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
3915 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
3916 // No need to check this sig any longer
3917 sigaddset(&check_signal_done, sig);
3918 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN
3919 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) {
3920 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell",
3921 exception_name(sig, buf, O_BUFLEN));
3922 }
3923 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
3924 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
3925 tty->print("expected:");
3926 os::Posix::print_sa_flags(tty, os::Solaris::get_our_sigflags(sig));
3927 tty->cr();
3928 tty->print(" found:");
3929 os::Posix::print_sa_flags(tty, act.sa_flags);
3930 tty->cr();
3931 // No need to check this sig any longer
3932 sigaddset(&check_signal_done, sig);
3933 }
3934
3935 // Print all the signal handler state
3936 if (sigismember(&check_signal_done, sig)) {
3937 print_signal_handlers(tty, buf, O_BUFLEN);
3938 }
3939
3940 }
3941
3942 void os::Solaris::install_signal_handlers() {
3943 signal_handlers_are_installed = true;
3944
3945 // signal-chaining
3946 typedef void (*signal_setting_t)();
3947 signal_setting_t begin_signal_setting = NULL;
3948 signal_setting_t end_signal_setting = NULL;
3949 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
3950 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
3951 if (begin_signal_setting != NULL) {
3952 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
3953 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
3954 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
3955 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
3956 libjsig_is_loaded = true;
3957 assert(UseSignalChaining, "should enable signal-chaining");
3958 }
3959 if (libjsig_is_loaded) {
3960 // Tell libjsig jvm is setting signal handlers
3961 (*begin_signal_setting)();
3962 }
3963
3964 set_signal_handler(SIGSEGV, true, true);
3965 set_signal_handler(SIGPIPE, true, true);
3966 set_signal_handler(SIGXFSZ, true, true);
3967 set_signal_handler(SIGBUS, true, true);
3968 set_signal_handler(SIGILL, true, true);
3969 set_signal_handler(SIGFPE, true, true);
3970 set_signal_handler(ASYNC_SIGNAL, true, true);
3971
3972 if (libjsig_is_loaded) {
3973 // Tell libjsig jvm finishes setting signal handlers
3974 (*end_signal_setting)();
3975 }
3976
3977 // We don't activate signal checker if libjsig is in place, we trust ourselves
3978 // and if UserSignalHandler is installed all bets are off.
3979 // Log that signal checking is off only if -verbose:jni is specified.
3980 if (CheckJNICalls) {
3981 if (libjsig_is_loaded) {
3982 if (PrintJNIResolving) {
3983 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
3984 }
3985 check_signals = false;
3986 }
3987 if (AllowUserSignalHandlers) {
3988 if (PrintJNIResolving) {
3989 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
3990 }
3991 check_signals = false;
3992 }
3993 }
3994 }
3995
3996
3997 void report_error(const char* file_name, int line_no, const char* title,
3998 const char* format, ...);
3999
4000 // (Static) wrappers for the liblgrp API
4001 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
4002 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
4003 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
4004 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
4005 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
4006 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
4007 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
4008 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
4009 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
4010
4011 static address resolve_symbol_lazy(const char* name) {
4012 address addr = (address) dlsym(RTLD_DEFAULT, name);
4013 if (addr == NULL) {
4014 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
4015 addr = (address) dlsym(RTLD_NEXT, name);
4016 }
4017 return addr;
4018 }
4019
4020 static address resolve_symbol(const char* name) {
4021 address addr = resolve_symbol_lazy(name);
4022 if (addr == NULL) {
4023 fatal(dlerror());
4024 }
4025 return addr;
4026 }
4027
4028 void os::Solaris::libthread_init() {
4029 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
4030
4031 lwp_priocntl_init();
4032
4033 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
4034 if (func == NULL) {
4035 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
4036 // Guarantee that this VM is running on an new enough OS (5.6 or
4037 // later) that it will have a new enough libthread.so.
4038 guarantee(func != NULL, "libthread.so is too old.");
4039 }
4040
4041 int size;
4042 void (*handler_info_func)(address *, int *);
4043 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
4044 handler_info_func(&handler_start, &size);
4045 handler_end = handler_start + size;
4046 }
4047
4048
4049 int_fnP_mutex_tP os::Solaris::_mutex_lock;
4050 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
4051 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
4052 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
4053 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
4054 int os::Solaris::_mutex_scope = USYNC_THREAD;
4055
4056 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
4057 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
4058 int_fnP_cond_tP os::Solaris::_cond_signal;
4059 int_fnP_cond_tP os::Solaris::_cond_broadcast;
4060 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
4061 int_fnP_cond_tP os::Solaris::_cond_destroy;
4062 int os::Solaris::_cond_scope = USYNC_THREAD;
4063 bool os::Solaris::_synchronization_initialized;
4064
4065 void os::Solaris::synchronization_init() {
4066 if (UseLWPSynchronization) {
4067 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
4068 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
4069 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
4070 os::Solaris::set_mutex_init(lwp_mutex_init);
4071 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
4072 os::Solaris::set_mutex_scope(USYNC_THREAD);
4073
4074 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
4075 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
4076 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
4077 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
4078 os::Solaris::set_cond_init(lwp_cond_init);
4079 os::Solaris::set_cond_destroy(lwp_cond_destroy);
4080 os::Solaris::set_cond_scope(USYNC_THREAD);
4081 } else {
4082 os::Solaris::set_mutex_scope(USYNC_THREAD);
4083 os::Solaris::set_cond_scope(USYNC_THREAD);
4084
4085 if (UsePthreads) {
4086 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
4087 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
4088 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
4089 os::Solaris::set_mutex_init(pthread_mutex_default_init);
4090 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
4091
4092 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
4093 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
4094 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
4095 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
4096 os::Solaris::set_cond_init(pthread_cond_default_init);
4097 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
4098 } else {
4099 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
4100 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
4101 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
4102 os::Solaris::set_mutex_init(::mutex_init);
4103 os::Solaris::set_mutex_destroy(::mutex_destroy);
4104
4105 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
4106 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
4107 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
4108 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
4109 os::Solaris::set_cond_init(::cond_init);
4110 os::Solaris::set_cond_destroy(::cond_destroy);
4111 }
4112 }
4113 _synchronization_initialized = true;
4114 }
4115
4116 bool os::Solaris::liblgrp_init() {
4117 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
4118 if (handle != NULL) {
4119 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
4120 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
4121 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
4122 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
4123 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
4124 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
4125 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
4126 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
4127 dlsym(handle, "lgrp_cookie_stale")));
4128
4129 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4130 set_lgrp_cookie(c);
4131 return true;
4132 }
4133 return false;
4134 }
4135
4136 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4137 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4138 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4139
4140 void init_pset_getloadavg_ptr(void) {
4141 pset_getloadavg_ptr =
4142 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4143 if (pset_getloadavg_ptr == NULL) {
4144 log_warning(os)("pset_getloadavg function not found");
4145 }
4146 }
4147
4148 int os::Solaris::_dev_zero_fd = -1;
4149
4150 // this is called _before_ the global arguments have been parsed
4151 void os::init(void) {
4152 _initial_pid = getpid();
4153
4154 max_hrtime = first_hrtime = gethrtime();
4155
4156 init_random(1234567);
4157
4158 page_size = sysconf(_SC_PAGESIZE);
4159 if (page_size == -1) {
4160 fatal("os_solaris.cpp: os::init: sysconf failed (%s)", os::strerror(errno));
4161 }
4162 init_page_sizes((size_t) page_size);
4163
4164 Solaris::initialize_system_info();
4165
4166 int fd = ::open("/dev/zero", O_RDWR);
4167 if (fd < 0) {
4168 fatal("os::init: cannot open /dev/zero (%s)", os::strerror(errno));
4169 } else {
4170 Solaris::set_dev_zero_fd(fd);
4171
4172 // Close on exec, child won't inherit.
4173 fcntl(fd, F_SETFD, FD_CLOEXEC);
4174 }
4175
4176 clock_tics_per_sec = CLK_TCK;
4177
4178 // check if dladdr1() exists; dladdr1 can provide more information than
4179 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4180 // and is available on linker patches for 5.7 and 5.8.
4181 // libdl.so must have been loaded, this call is just an entry lookup
4182 void * hdl = dlopen("libdl.so", RTLD_NOW);
4183 if (hdl) {
4184 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4185 }
4186
4187 // main_thread points to the thread that created/loaded the JVM.
4188 main_thread = thr_self();
4189
4190 // dynamic lookup of functions that may not be available in our lowest
4191 // supported Solaris release
4192 void * handle = dlopen("libc.so.1", RTLD_LAZY);
4193 if (handle != NULL) {
4194 Solaris::_pthread_setname_np = // from 11.3
4195 (Solaris::pthread_setname_np_func_t)dlsym(handle, "pthread_setname_np");
4196 }
4197 }
4198
4199 // To install functions for atexit system call
4200 extern "C" {
4201 static void perfMemory_exit_helper() {
4202 perfMemory_exit();
4203 }
4204 }
4205
4206 // this is called _after_ the global arguments have been parsed
4207 jint os::init_2(void) {
4208 // try to enable extended file IO ASAP, see 6431278
4209 os::Solaris::try_enable_extended_io();
4210
4211 // Check and sets minimum stack sizes against command line options
4212 if (Posix::set_minimum_stack_sizes() == JNI_ERR) {
4213 return JNI_ERR;
4214 }
4215
4216 Solaris::libthread_init();
4217
4218 if (UseNUMA) {
4219 if (!Solaris::liblgrp_init()) {
4220 UseNUMA = false;
4221 } else {
4222 size_t lgrp_limit = os::numa_get_groups_num();
4223 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
4224 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4225 FREE_C_HEAP_ARRAY(int, lgrp_ids);
4226 if (lgrp_num < 2) {
4227 // There's only one locality group, disable NUMA.
4228 UseNUMA = false;
4229 }
4230 }
4231 if (!UseNUMA && ForceNUMA) {
4232 UseNUMA = true;
4233 }
4234 }
4235
4236 Solaris::signal_sets_init();
4237 Solaris::init_signal_mem();
4238 Solaris::install_signal_handlers();
4239 // Initialize data for jdk.internal.misc.Signal
4240 if (!ReduceSignalUsage) {
4241 jdk_misc_signal_init();
4242 }
4243
4244 // initialize synchronization primitives to use either thread or
4245 // lwp synchronization (controlled by UseLWPSynchronization)
4246 Solaris::synchronization_init();
4247
4248 if (MaxFDLimit) {
4249 // set the number of file descriptors to max. print out error
4250 // if getrlimit/setrlimit fails but continue regardless.
4251 struct rlimit nbr_files;
4252 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4253 if (status != 0) {
4254 log_info(os)("os::init_2 getrlimit failed: %s", os::strerror(errno));
4255 } else {
4256 nbr_files.rlim_cur = nbr_files.rlim_max;
4257 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4258 if (status != 0) {
4259 log_info(os)("os::init_2 setrlimit failed: %s", os::strerror(errno));
4260 }
4261 }
4262 }
4263
4264 // Calculate theoretical max. size of Threads to guard gainst
4265 // artifical out-of-memory situations, where all available address-
4266 // space has been reserved by thread stacks. Default stack size is 1Mb.
4267 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
4268 JavaThread::stack_size_at_create() : (1*K*K);
4269 assert(pre_thread_stack_size != 0, "Must have a stack");
4270 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
4271 // we should start doing Virtual Memory banging. Currently when the threads will
4272 // have used all but 200Mb of space.
4273 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
4274 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
4275
4276 // at-exit methods are called in the reverse order of their registration.
4277 // In Solaris 7 and earlier, atexit functions are called on return from
4278 // main or as a result of a call to exit(3C). There can be only 32 of
4279 // these functions registered and atexit() does not set errno. In Solaris
4280 // 8 and later, there is no limit to the number of functions registered
4281 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
4282 // functions are called upon dlclose(3DL) in addition to return from main
4283 // and exit(3C).
4284
4285 if (PerfAllowAtExitRegistration) {
4286 // only register atexit functions if PerfAllowAtExitRegistration is set.
4287 // atexit functions can be delayed until process exit time, which
4288 // can be problematic for embedded VM situations. Embedded VMs should
4289 // call DestroyJavaVM() to assure that VM resources are released.
4290
4291 // note: perfMemory_exit_helper atexit function may be removed in
4292 // the future if the appropriate cleanup code can be added to the
4293 // VM_Exit VMOperation's doit method.
4294 if (atexit(perfMemory_exit_helper) != 0) {
4295 warning("os::init2 atexit(perfMemory_exit_helper) failed");
4296 }
4297 }
4298
4299 // Init pset_loadavg function pointer
4300 init_pset_getloadavg_ptr();
4301
4302 return JNI_OK;
4303 }
4304
4305 // Mark the polling page as unreadable
4306 void os::make_polling_page_unreadable(void) {
4307 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) {
4308 fatal("Could not disable polling page");
4309 }
4310 }
4311
4312 // Mark the polling page as readable
4313 void os::make_polling_page_readable(void) {
4314 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) {
4315 fatal("Could not enable polling page");
4316 }
4317 }
4318
4319 // Is a (classpath) directory empty?
4320 bool os::dir_is_empty(const char* path) {
4321 DIR *dir = NULL;
4322 struct dirent *ptr;
4323
4324 dir = opendir(path);
4325 if (dir == NULL) return true;
4326
4327 // Scan the directory
4328 bool result = true;
4329 while (result && (ptr = readdir(dir)) != NULL) {
4330 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
4331 result = false;
4332 }
4333 }
4334 closedir(dir);
4335 return result;
4336 }
4337
4338 // This code originates from JDK's sysOpen and open64_w
4339 // from src/solaris/hpi/src/system_md.c
4340
4341 int os::open(const char *path, int oflag, int mode) {
4342 if (strlen(path) > MAX_PATH - 1) {
4343 errno = ENAMETOOLONG;
4344 return -1;
4345 }
4346 int fd;
4347
4348 fd = ::open64(path, oflag, mode);
4349 if (fd == -1) return -1;
4350
4351 // If the open succeeded, the file might still be a directory
4352 {
4353 struct stat64 buf64;
4354 int ret = ::fstat64(fd, &buf64);
4355 int st_mode = buf64.st_mode;
4356
4357 if (ret != -1) {
4358 if ((st_mode & S_IFMT) == S_IFDIR) {
4359 errno = EISDIR;
4360 ::close(fd);
4361 return -1;
4362 }
4363 } else {
4364 ::close(fd);
4365 return -1;
4366 }
4367 }
4368
4369 // 32-bit Solaris systems suffer from:
4370 //
4371 // - an historical default soft limit of 256 per-process file
4372 // descriptors that is too low for many Java programs.
4373 //
4374 // - a design flaw where file descriptors created using stdio
4375 // fopen must be less than 256, _even_ when the first limit above
4376 // has been raised. This can cause calls to fopen (but not calls to
4377 // open, for example) to fail mysteriously, perhaps in 3rd party
4378 // native code (although the JDK itself uses fopen). One can hardly
4379 // criticize them for using this most standard of all functions.
4380 //
4381 // We attempt to make everything work anyways by:
4382 //
4383 // - raising the soft limit on per-process file descriptors beyond
4384 // 256
4385 //
4386 // - As of Solaris 10u4, we can request that Solaris raise the 256
4387 // stdio fopen limit by calling function enable_extended_FILE_stdio.
4388 // This is done in init_2 and recorded in enabled_extended_FILE_stdio
4389 //
4390 // - If we are stuck on an old (pre 10u4) Solaris system, we can
4391 // workaround the bug by remapping non-stdio file descriptors below
4392 // 256 to ones beyond 256, which is done below.
4393 //
4394 // See:
4395 // 1085341: 32-bit stdio routines should support file descriptors >255
4396 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files
4397 // 6431278: Netbeans crash on 32 bit Solaris: need to call
4398 // enable_extended_FILE_stdio() in VM initialisation
4399 // Giri Mandalika's blog
4400 // http://technopark02.blogspot.com/2005_05_01_archive.html
4401 //
4402 #ifndef _LP64
4403 if ((!enabled_extended_FILE_stdio) && fd < 256) {
4404 int newfd = ::fcntl(fd, F_DUPFD, 256);
4405 if (newfd != -1) {
4406 ::close(fd);
4407 fd = newfd;
4408 }
4409 }
4410 #endif // 32-bit Solaris
4411
4412 // All file descriptors that are opened in the JVM and not
4413 // specifically destined for a subprocess should have the
4414 // close-on-exec flag set. If we don't set it, then careless 3rd
4415 // party native code might fork and exec without closing all
4416 // appropriate file descriptors (e.g. as we do in closeDescriptors in
4417 // UNIXProcess.c), and this in turn might:
4418 //
4419 // - cause end-of-file to fail to be detected on some file
4420 // descriptors, resulting in mysterious hangs, or
4421 //
4422 // - might cause an fopen in the subprocess to fail on a system
4423 // suffering from bug 1085341.
4424 //
4425 // (Yes, the default setting of the close-on-exec flag is a Unix
4426 // design flaw)
4427 //
4428 // See:
4429 // 1085341: 32-bit stdio routines should support file descriptors >255
4430 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed
4431 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
4432 //
4433 #ifdef FD_CLOEXEC
4434 {
4435 int flags = ::fcntl(fd, F_GETFD);
4436 if (flags != -1) {
4437 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
4438 }
4439 }
4440 #endif
4441
4442 return fd;
4443 }
4444
4445 // create binary file, rewriting existing file if required
4446 int os::create_binary_file(const char* path, bool rewrite_existing) {
4447 int oflags = O_WRONLY | O_CREAT;
4448 if (!rewrite_existing) {
4449 oflags |= O_EXCL;
4450 }
4451 return ::open64(path, oflags, S_IREAD | S_IWRITE);
4452 }
4453
4454 // return current position of file pointer
4455 jlong os::current_file_offset(int fd) {
4456 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
4457 }
4458
4459 // move file pointer to the specified offset
4460 jlong os::seek_to_file_offset(int fd, jlong offset) {
4461 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
4462 }
4463
4464 jlong os::lseek(int fd, jlong offset, int whence) {
4465 return (jlong) ::lseek64(fd, offset, whence);
4466 }
4467
4468 int os::ftruncate(int fd, jlong length) {
4469 return ::ftruncate64(fd, length);
4470 }
4471
4472 int os::fsync(int fd) {
4473 RESTARTABLE_RETURN_INT(::fsync(fd));
4474 }
4475
4476 int os::available(int fd, jlong *bytes) {
4477 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
4478 "Assumed _thread_in_native");
4479 jlong cur, end;
4480 int mode;
4481 struct stat64 buf64;
4482
4483 if (::fstat64(fd, &buf64) >= 0) {
4484 mode = buf64.st_mode;
4485 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
4486 int n,ioctl_return;
4487
4488 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return);
4489 if (ioctl_return>= 0) {
4490 *bytes = n;
4491 return 1;
4492 }
4493 }
4494 }
4495 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
4496 return 0;
4497 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
4498 return 0;
4499 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
4500 return 0;
4501 }
4502 *bytes = end - cur;
4503 return 1;
4504 }
4505
4506 // Map a block of memory.
4507 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
4508 char *addr, size_t bytes, bool read_only,
4509 bool allow_exec) {
4510 int prot;
4511 int flags;
4512
4513 if (read_only) {
4514 prot = PROT_READ;
4515 flags = MAP_SHARED;
4516 } else {
4517 prot = PROT_READ | PROT_WRITE;
4518 flags = MAP_PRIVATE;
4519 }
4520
4521 if (allow_exec) {
4522 prot |= PROT_EXEC;
4523 }
4524
4525 if (addr != NULL) {
4526 flags |= MAP_FIXED;
4527 }
4528
4529 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
4530 fd, file_offset);
4531 if (mapped_address == MAP_FAILED) {
4532 return NULL;
4533 }
4534 return mapped_address;
4535 }
4536
4537
4538 // Remap a block of memory.
4539 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
4540 char *addr, size_t bytes, bool read_only,
4541 bool allow_exec) {
4542 // same as map_memory() on this OS
4543 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
4544 allow_exec);
4545 }
4546
4547
4548 // Unmap a block of memory.
4549 bool os::pd_unmap_memory(char* addr, size_t bytes) {
4550 return munmap(addr, bytes) == 0;
4551 }
4552
4553 void os::pause() {
4554 char filename[MAX_PATH];
4555 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
4556 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
4557 } else {
4558 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
4559 }
4560
4561 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
4562 if (fd != -1) {
4563 struct stat buf;
4564 ::close(fd);
4565 while (::stat(filename, &buf) == 0) {
4566 (void)::poll(NULL, 0, 100);
4567 }
4568 } else {
4569 jio_fprintf(stderr,
4570 "Could not open pause file '%s', continuing immediately.\n", filename);
4571 }
4572 }
4573
4574 #ifndef PRODUCT
4575 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
4576 // Turn this on if you need to trace synch operations.
4577 // Set RECORD_SYNCH_LIMIT to a large-enough value,
4578 // and call record_synch_enable and record_synch_disable
4579 // around the computation of interest.
4580
4581 void record_synch(char* name, bool returning); // defined below
4582
4583 class RecordSynch {
4584 char* _name;
4585 public:
4586 RecordSynch(char* name) :_name(name) { record_synch(_name, false); }
4587 ~RecordSynch() { record_synch(_name, true); }
4588 };
4589
4590 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
4591 extern "C" ret name params { \
4592 typedef ret name##_t params; \
4593 static name##_t* implem = NULL; \
4594 static int callcount = 0; \
4595 if (implem == NULL) { \
4596 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
4597 if (implem == NULL) fatal(dlerror()); \
4598 } \
4599 ++callcount; \
4600 RecordSynch _rs(#name); \
4601 inner; \
4602 return implem args; \
4603 }
4604 // in dbx, examine callcounts this way:
4605 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
4606
4607 #define CHECK_POINTER_OK(p) \
4608 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
4609 #define CHECK_MU \
4610 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
4611 #define CHECK_CV \
4612 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
4613 #define CHECK_P(p) \
4614 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
4615
4616 #define CHECK_MUTEX(mutex_op) \
4617 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
4618
4619 CHECK_MUTEX( mutex_lock)
4620 CHECK_MUTEX( _mutex_lock)
4621 CHECK_MUTEX( mutex_unlock)
4622 CHECK_MUTEX(_mutex_unlock)
4623 CHECK_MUTEX( mutex_trylock)
4624 CHECK_MUTEX(_mutex_trylock)
4625
4626 #define CHECK_COND(cond_op) \
4627 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV);
4628
4629 CHECK_COND( cond_wait);
4630 CHECK_COND(_cond_wait);
4631 CHECK_COND(_cond_wait_cancel);
4632
4633 #define CHECK_COND2(cond_op) \
4634 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV);
4635
4636 CHECK_COND2( cond_timedwait);
4637 CHECK_COND2(_cond_timedwait);
4638 CHECK_COND2(_cond_timedwait_cancel);
4639
4640 // do the _lwp_* versions too
4641 #define mutex_t lwp_mutex_t
4642 #define cond_t lwp_cond_t
4643 CHECK_MUTEX( _lwp_mutex_lock)
4644 CHECK_MUTEX( _lwp_mutex_unlock)
4645 CHECK_MUTEX( _lwp_mutex_trylock)
4646 CHECK_MUTEX( __lwp_mutex_lock)
4647 CHECK_MUTEX( __lwp_mutex_unlock)
4648 CHECK_MUTEX( __lwp_mutex_trylock)
4649 CHECK_MUTEX(___lwp_mutex_lock)
4650 CHECK_MUTEX(___lwp_mutex_unlock)
4651
4652 CHECK_COND( _lwp_cond_wait);
4653 CHECK_COND( __lwp_cond_wait);
4654 CHECK_COND(___lwp_cond_wait);
4655
4656 CHECK_COND2( _lwp_cond_timedwait);
4657 CHECK_COND2( __lwp_cond_timedwait);
4658 #undef mutex_t
4659 #undef cond_t
4660
4661 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
4662 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
4663 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
4664 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
4665 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
4666 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
4667 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
4668 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
4669
4670
4671 // recording machinery:
4672
4673 enum { RECORD_SYNCH_LIMIT = 200 };
4674 char* record_synch_name[RECORD_SYNCH_LIMIT];
4675 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
4676 bool record_synch_returning[RECORD_SYNCH_LIMIT];
4677 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
4678 int record_synch_count = 0;
4679 bool record_synch_enabled = false;
4680
4681 // in dbx, examine recorded data this way:
4682 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
4683
4684 void record_synch(char* name, bool returning) {
4685 if (record_synch_enabled) {
4686 if (record_synch_count < RECORD_SYNCH_LIMIT) {
4687 record_synch_name[record_synch_count] = name;
4688 record_synch_returning[record_synch_count] = returning;
4689 record_synch_thread[record_synch_count] = thr_self();
4690 record_synch_arg0ptr[record_synch_count] = &name;
4691 record_synch_count++;
4692 }
4693 // put more checking code here:
4694 // ...
4695 }
4696 }
4697
4698 void record_synch_enable() {
4699 // start collecting trace data, if not already doing so
4700 if (!record_synch_enabled) record_synch_count = 0;
4701 record_synch_enabled = true;
4702 }
4703
4704 void record_synch_disable() {
4705 // stop collecting trace data
4706 record_synch_enabled = false;
4707 }
4708
4709 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
4710 #endif // PRODUCT
4711
4712 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
4713 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
4714 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
4715
4716
4717 // JVMTI & JVM monitoring and management support
4718 // The thread_cpu_time() and current_thread_cpu_time() are only
4719 // supported if is_thread_cpu_time_supported() returns true.
4720 // They are not supported on Solaris T1.
4721
4722 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
4723 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
4724 // of a thread.
4725 //
4726 // current_thread_cpu_time() and thread_cpu_time(Thread *)
4727 // returns the fast estimate available on the platform.
4728
4729 // hrtime_t gethrvtime() return value includes
4730 // user time but does not include system time
4731 jlong os::current_thread_cpu_time() {
4732 return (jlong) gethrvtime();
4733 }
4734
4735 jlong os::thread_cpu_time(Thread *thread) {
4736 // return user level CPU time only to be consistent with
4737 // what current_thread_cpu_time returns.
4738 // thread_cpu_time_info() must be changed if this changes
4739 return os::thread_cpu_time(thread, false /* user time only */);
4740 }
4741
4742 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
4743 if (user_sys_cpu_time) {
4744 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
4745 } else {
4746 return os::current_thread_cpu_time();
4747 }
4748 }
4749
4750 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
4751 char proc_name[64];
4752 int count;
4753 prusage_t prusage;
4754 jlong lwp_time;
4755 int fd;
4756
4757 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
4758 getpid(),
4759 thread->osthread()->lwp_id());
4760 fd = ::open(proc_name, O_RDONLY);
4761 if (fd == -1) return -1;
4762
4763 do {
4764 count = ::pread(fd,
4765 (void *)&prusage.pr_utime,
4766 thr_time_size,
4767 thr_time_off);
4768 } while (count < 0 && errno == EINTR);
4769 ::close(fd);
4770 if (count < 0) return -1;
4771
4772 if (user_sys_cpu_time) {
4773 // user + system CPU time
4774 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
4775 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
4776 (jlong)prusage.pr_stime.tv_nsec +
4777 (jlong)prusage.pr_utime.tv_nsec;
4778 } else {
4779 // user level CPU time only
4780 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
4781 (jlong)prusage.pr_utime.tv_nsec;
4782 }
4783
4784 return (lwp_time);
4785 }
4786
4787 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
4788 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
4789 info_ptr->may_skip_backward = false; // elapsed time not wall time
4790 info_ptr->may_skip_forward = false; // elapsed time not wall time
4791 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
4792 }
4793
4794 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
4795 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
4796 info_ptr->may_skip_backward = false; // elapsed time not wall time
4797 info_ptr->may_skip_forward = false; // elapsed time not wall time
4798 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
4799 }
4800
4801 bool os::is_thread_cpu_time_supported() {
4802 return true;
4803 }
4804
4805 // System loadavg support. Returns -1 if load average cannot be obtained.
4806 // Return the load average for our processor set if the primitive exists
4807 // (Solaris 9 and later). Otherwise just return system wide loadavg.
4808 int os::loadavg(double loadavg[], int nelem) {
4809 if (pset_getloadavg_ptr != NULL) {
4810 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
4811 } else {
4812 return ::getloadavg(loadavg, nelem);
4813 }
4814 }
4815
4816 //---------------------------------------------------------------------------------
4817
4818 bool os::find(address addr, outputStream* st) {
4819 Dl_info dlinfo;
4820 memset(&dlinfo, 0, sizeof(dlinfo));
4821 if (dladdr(addr, &dlinfo) != 0) {
4822 st->print(PTR_FORMAT ": ", addr);
4823 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
4824 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
4825 } else if (dlinfo.dli_fbase != NULL) {
4826 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
4827 } else {
4828 st->print("<absolute address>");
4829 }
4830 if (dlinfo.dli_fname != NULL) {
4831 st->print(" in %s", dlinfo.dli_fname);
4832 }
4833 if (dlinfo.dli_fbase != NULL) {
4834 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
4835 }
4836 st->cr();
4837
4838 if (Verbose) {
4839 // decode some bytes around the PC
4840 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size());
4841 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size());
4842 address lowest = (address) dlinfo.dli_sname;
4843 if (!lowest) lowest = (address) dlinfo.dli_fbase;
4844 if (begin < lowest) begin = lowest;
4845 Dl_info dlinfo2;
4846 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
4847 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) {
4848 end = (address) dlinfo2.dli_saddr;
4849 }
4850 Disassembler::decode(begin, end, st);
4851 }
4852 return true;
4853 }
4854 return false;
4855 }
4856
4857 // Following function has been added to support HotSparc's libjvm.so running
4858 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
4859 // src/solaris/hpi/native_threads in the EVM codebase.
4860 //
4861 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
4862 // libraries and should thus be removed. We will leave it behind for a while
4863 // until we no longer want to able to run on top of 1.3.0 Solaris production
4864 // JDK. See 4341971.
4865
4866 #define STACK_SLACK 0x800
4867
4868 extern "C" {
4869 intptr_t sysThreadAvailableStackWithSlack() {
4870 stack_t st;
4871 intptr_t retval, stack_top;
4872 retval = thr_stksegment(&st);
4873 assert(retval == 0, "incorrect return value from thr_stksegment");
4874 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
4875 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
4876 stack_top=(intptr_t)st.ss_sp-st.ss_size;
4877 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
4878 }
4879 }
4880
4881 // ObjectMonitor park-unpark infrastructure ...
4882 //
4883 // We implement Solaris and Linux PlatformEvents with the
4884 // obvious condvar-mutex-flag triple.
4885 // Another alternative that works quite well is pipes:
4886 // Each PlatformEvent consists of a pipe-pair.
4887 // The thread associated with the PlatformEvent
4888 // calls park(), which reads from the input end of the pipe.
4889 // Unpark() writes into the other end of the pipe.
4890 // The write-side of the pipe must be set NDELAY.
4891 // Unfortunately pipes consume a large # of handles.
4892 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
4893 // Using pipes for the 1st few threads might be workable, however.
4894 //
4895 // park() is permitted to return spuriously.
4896 // Callers of park() should wrap the call to park() in
4897 // an appropriate loop. A litmus test for the correct
4898 // usage of park is the following: if park() were modified
4899 // to immediately return 0 your code should still work,
4900 // albeit degenerating to a spin loop.
4901 //
4902 // In a sense, park()-unpark() just provides more polite spinning
4903 // and polling with the key difference over naive spinning being
4904 // that a parked thread needs to be explicitly unparked() in order
4905 // to wake up and to poll the underlying condition.
4906 //
4907 // Assumption:
4908 // Only one parker can exist on an event, which is why we allocate
4909 // them per-thread. Multiple unparkers can coexist.
4910 //
4911 // _Event transitions in park()
4912 // -1 => -1 : illegal
4913 // 1 => 0 : pass - return immediately
4914 // 0 => -1 : block; then set _Event to 0 before returning
4915 //
4916 // _Event transitions in unpark()
4917 // 0 => 1 : just return
4918 // 1 => 1 : just return
4919 // -1 => either 0 or 1; must signal target thread
4920 // That is, we can safely transition _Event from -1 to either
4921 // 0 or 1.
4922 //
4923 // _Event serves as a restricted-range semaphore.
4924 // -1 : thread is blocked, i.e. there is a waiter
4925 // 0 : neutral: thread is running or ready,
4926 // could have been signaled after a wait started
4927 // 1 : signaled - thread is running or ready
4928 //
4929 // Another possible encoding of _Event would be with
4930 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
4931 //
4932 // TODO-FIXME: add DTRACE probes for:
4933 // 1. Tx parks
4934 // 2. Ty unparks Tx
4935 // 3. Tx resumes from park
4936
4937
4938 // value determined through experimentation
4939 #define ROUNDINGFIX 11
4940
4941 // utility to compute the abstime argument to timedwait.
4942 // TODO-FIXME: switch from compute_abstime() to unpackTime().
4943
4944 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
4945 // millis is the relative timeout time
4946 // abstime will be the absolute timeout time
4947 if (millis < 0) millis = 0;
4948 struct timeval now;
4949 int status = gettimeofday(&now, NULL);
4950 assert(status == 0, "gettimeofday");
4951 jlong seconds = millis / 1000;
4952 jlong max_wait_period;
4953
4954 if (UseLWPSynchronization) {
4955 // forward port of fix for 4275818 (not sleeping long enough)
4956 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
4957 // _lwp_cond_timedwait() used a round_down algorithm rather
4958 // than a round_up. For millis less than our roundfactor
4959 // it rounded down to 0 which doesn't meet the spec.
4960 // For millis > roundfactor we may return a bit sooner, but
4961 // since we can not accurately identify the patch level and
4962 // this has already been fixed in Solaris 9 and 8 we will
4963 // leave it alone rather than always rounding down.
4964
4965 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
4966 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
4967 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
4968 max_wait_period = 21000000;
4969 } else {
4970 max_wait_period = 50000000;
4971 }
4972 millis %= 1000;
4973 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
4974 seconds = max_wait_period;
4975 }
4976 abstime->tv_sec = now.tv_sec + seconds;
4977 long usec = now.tv_usec + millis * 1000;
4978 if (usec >= 1000000) {
4979 abstime->tv_sec += 1;
4980 usec -= 1000000;
4981 }
4982 abstime->tv_nsec = usec * 1000;
4983 return abstime;
4984 }
4985
4986 void os::PlatformEvent::park() { // AKA: down()
4987 // Transitions for _Event:
4988 // -1 => -1 : illegal
4989 // 1 => 0 : pass - return immediately
4990 // 0 => -1 : block; then set _Event to 0 before returning
4991
4992 // Invariant: Only the thread associated with the Event/PlatformEvent
4993 // may call park().
4994 assert(_nParked == 0, "invariant");
4995
4996 int v;
4997 for (;;) {
4998 v = _Event;
4999 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5000 }
5001 guarantee(v >= 0, "invariant");
5002 if (v == 0) {
5003 // Do this the hard way by blocking ...
5004 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5005 int status = os::Solaris::mutex_lock(_mutex);
5006 assert_status(status == 0, status, "mutex_lock");
5007 guarantee(_nParked == 0, "invariant");
5008 ++_nParked;
5009 while (_Event < 0) {
5010 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
5011 // Treat this the same as if the wait was interrupted
5012 // With usr/lib/lwp going to kernel, always handle ETIME
5013 status = os::Solaris::cond_wait(_cond, _mutex);
5014 if (status == ETIME) status = EINTR;
5015 assert_status(status == 0 || status == EINTR, status, "cond_wait");
5016 }
5017 --_nParked;
5018 _Event = 0;
5019 status = os::Solaris::mutex_unlock(_mutex);
5020 assert_status(status == 0, status, "mutex_unlock");
5021 // Paranoia to ensure our locked and lock-free paths interact
5022 // correctly with each other.
5023 OrderAccess::fence();
5024 }
5025 }
5026
5027 int os::PlatformEvent::park(jlong millis) {
5028 // Transitions for _Event:
5029 // -1 => -1 : illegal
5030 // 1 => 0 : pass - return immediately
5031 // 0 => -1 : block; then set _Event to 0 before returning
5032
5033 guarantee(_nParked == 0, "invariant");
5034 int v;
5035 for (;;) {
5036 v = _Event;
5037 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
5038 }
5039 guarantee(v >= 0, "invariant");
5040 if (v != 0) return OS_OK;
5041
5042 int ret = OS_TIMEOUT;
5043 timestruc_t abst;
5044 compute_abstime(&abst, millis);
5045
5046 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5047 int status = os::Solaris::mutex_lock(_mutex);
5048 assert_status(status == 0, status, "mutex_lock");
5049 guarantee(_nParked == 0, "invariant");
5050 ++_nParked;
5051 while (_Event < 0) {
5052 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
5053 assert_status(status == 0 || status == EINTR ||
5054 status == ETIME || status == ETIMEDOUT,
5055 status, "cond_timedwait");
5056 if (!FilterSpuriousWakeups) break; // previous semantics
5057 if (status == ETIME || status == ETIMEDOUT) break;
5058 // We consume and ignore EINTR and spurious wakeups.
5059 }
5060 --_nParked;
5061 if (_Event >= 0) ret = OS_OK;
5062 _Event = 0;
5063 status = os::Solaris::mutex_unlock(_mutex);
5064 assert_status(status == 0, status, "mutex_unlock");
5065 // Paranoia to ensure our locked and lock-free paths interact
5066 // correctly with each other.
5067 OrderAccess::fence();
5068 return ret;
5069 }
5070
5071 void os::PlatformEvent::unpark() {
5072 // Transitions for _Event:
5073 // 0 => 1 : just return
5074 // 1 => 1 : just return
5075 // -1 => either 0 or 1; must signal target thread
5076 // That is, we can safely transition _Event from -1 to either
5077 // 0 or 1.
5078 // See also: "Semaphores in Plan 9" by Mullender & Cox
5079 //
5080 // Note: Forcing a transition from "-1" to "1" on an unpark() means
5081 // that it will take two back-to-back park() calls for the owning
5082 // thread to block. This has the benefit of forcing a spurious return
5083 // from the first park() call after an unpark() call which will help
5084 // shake out uses of park() and unpark() without condition variables.
5085
5086 if (Atomic::xchg(1, &_Event) >= 0) return;
5087
5088 // If the thread associated with the event was parked, wake it.
5089 // Wait for the thread assoc with the PlatformEvent to vacate.
5090 int status = os::Solaris::mutex_lock(_mutex);
5091 assert_status(status == 0, status, "mutex_lock");
5092 int AnyWaiters = _nParked;
5093 status = os::Solaris::mutex_unlock(_mutex);
5094 assert_status(status == 0, status, "mutex_unlock");
5095 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
5096 if (AnyWaiters != 0) {
5097 // Note that we signal() *after* dropping the lock for "immortal" Events.
5098 // This is safe and avoids a common class of futile wakeups. In rare
5099 // circumstances this can cause a thread to return prematurely from
5100 // cond_{timed}wait() but the spurious wakeup is benign and the victim
5101 // will simply re-test the condition and re-park itself.
5102 // This provides particular benefit if the underlying platform does not
5103 // provide wait morphing.
5104 status = os::Solaris::cond_signal(_cond);
5105 assert_status(status == 0, status, "cond_signal");
5106 }
5107 }
5108
5109 // JSR166
5110 // -------------------------------------------------------
5111
5112 // The solaris and linux implementations of park/unpark are fairly
5113 // conservative for now, but can be improved. They currently use a
5114 // mutex/condvar pair, plus _counter.
5115 // Park decrements _counter if > 0, else does a condvar wait. Unpark
5116 // sets count to 1 and signals condvar. Only one thread ever waits
5117 // on the condvar. Contention seen when trying to park implies that someone
5118 // is unparking you, so don't wait. And spurious returns are fine, so there
5119 // is no need to track notifications.
5120
5121 #define MAX_SECS 100000000
5122
5123 // This code is common to linux and solaris and will be moved to a
5124 // common place in dolphin.
5125 //
5126 // The passed in time value is either a relative time in nanoseconds
5127 // or an absolute time in milliseconds. Either way it has to be unpacked
5128 // into suitable seconds and nanoseconds components and stored in the
5129 // given timespec structure.
5130 // Given time is a 64-bit value and the time_t used in the timespec is only
5131 // a signed-32-bit value (except on 64-bit Linux) we have to watch for
5132 // overflow if times way in the future are given. Further on Solaris versions
5133 // prior to 10 there is a restriction (see cond_timedwait) that the specified
5134 // number of seconds, in abstime, is less than current_time + 100,000,000.
5135 // As it will be 28 years before "now + 100000000" will overflow we can
5136 // ignore overflow and just impose a hard-limit on seconds using the value
5137 // of "now + 100,000,000". This places a limit on the timeout of about 3.17
5138 // years from "now".
5139 //
5140 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5141 assert(time > 0, "convertTime");
5142
5143 struct timeval now;
5144 int status = gettimeofday(&now, NULL);
5145 assert(status == 0, "gettimeofday");
5146
5147 time_t max_secs = now.tv_sec + MAX_SECS;
5148
5149 if (isAbsolute) {
5150 jlong secs = time / 1000;
5151 if (secs > max_secs) {
5152 absTime->tv_sec = max_secs;
5153 } else {
5154 absTime->tv_sec = secs;
5155 }
5156 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5157 } else {
5158 jlong secs = time / NANOSECS_PER_SEC;
5159 if (secs >= MAX_SECS) {
5160 absTime->tv_sec = max_secs;
5161 absTime->tv_nsec = 0;
5162 } else {
5163 absTime->tv_sec = now.tv_sec + secs;
5164 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5165 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5166 absTime->tv_nsec -= NANOSECS_PER_SEC;
5167 ++absTime->tv_sec; // note: this must be <= max_secs
5168 }
5169 }
5170 }
5171 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5172 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5173 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5174 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5175 }
5176
5177 void Parker::park(bool isAbsolute, jlong time) {
5178 // Ideally we'd do something useful while spinning, such
5179 // as calling unpackTime().
5180
5181 // Optional fast-path check:
5182 // Return immediately if a permit is available.
5183 // We depend on Atomic::xchg() having full barrier semantics
5184 // since we are doing a lock-free update to _counter.
5185 if (Atomic::xchg(0, &_counter) > 0) return;
5186
5187 // Optional fast-exit: Check interrupt before trying to wait
5188 Thread* thread = Thread::current();
5189 assert(thread->is_Java_thread(), "Must be JavaThread");
5190 JavaThread *jt = (JavaThread *)thread;
5191 if (Thread::is_interrupted(thread, false)) {
5192 return;
5193 }
5194
5195 // First, demultiplex/decode time arguments
5196 timespec absTime;
5197 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all
5198 return;
5199 }
5200 if (time > 0) {
5201 // Warning: this code might be exposed to the old Solaris time
5202 // round-down bugs. Grep "roundingFix" for details.
5203 unpackTime(&absTime, isAbsolute, time);
5204 }
5205
5206 // Enter safepoint region
5207 // Beware of deadlocks such as 6317397.
5208 // The per-thread Parker:: _mutex is a classic leaf-lock.
5209 // In particular a thread must never block on the Threads_lock while
5210 // holding the Parker:: mutex. If safepoints are pending both the
5211 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
5212 ThreadBlockInVM tbivm(jt);
5213
5214 // Don't wait if cannot get lock since interference arises from
5215 // unblocking. Also. check interrupt before trying wait
5216 if (Thread::is_interrupted(thread, false) ||
5217 os::Solaris::mutex_trylock(_mutex) != 0) {
5218 return;
5219 }
5220
5221 int status;
5222
5223 if (_counter > 0) { // no wait needed
5224 _counter = 0;
5225 status = os::Solaris::mutex_unlock(_mutex);
5226 assert(status == 0, "invariant");
5227 // Paranoia to ensure our locked and lock-free paths interact
5228 // correctly with each other and Java-level accesses.
5229 OrderAccess::fence();
5230 return;
5231 }
5232
5233 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
5234 jt->set_suspend_equivalent();
5235 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
5236
5237 // Do this the hard way by blocking ...
5238 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5239 if (time == 0) {
5240 status = os::Solaris::cond_wait(_cond, _mutex);
5241 } else {
5242 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
5243 }
5244 // Note that an untimed cond_wait() can sometimes return ETIME on older
5245 // versions of the Solaris.
5246 assert_status(status == 0 || status == EINTR ||
5247 status == ETIME || status == ETIMEDOUT,
5248 status, "cond_timedwait");
5249
5250 _counter = 0;
5251 status = os::Solaris::mutex_unlock(_mutex);
5252 assert_status(status == 0, status, "mutex_unlock");
5253 // Paranoia to ensure our locked and lock-free paths interact
5254 // correctly with each other and Java-level accesses.
5255 OrderAccess::fence();
5256
5257 // If externally suspended while waiting, re-suspend
5258 if (jt->handle_special_suspend_equivalent_condition()) {
5259 jt->java_suspend_self();
5260 }
5261 }
5262
5263 void Parker::unpark() {
5264 int status = os::Solaris::mutex_lock(_mutex);
5265 assert(status == 0, "invariant");
5266 const int s = _counter;
5267 _counter = 1;
5268 status = os::Solaris::mutex_unlock(_mutex);
5269 assert(status == 0, "invariant");
5270
5271 if (s < 1) {
5272 status = os::Solaris::cond_signal(_cond);
5273 assert(status == 0, "invariant");
5274 }
5275 }
5276
5277 extern char** environ;
5278
5279 // Run the specified command in a separate process. Return its exit value,
5280 // or -1 on failure (e.g. can't fork a new process).
5281 // Unlike system(), this function can be called from signal handler. It
5282 // doesn't block SIGINT et al.
5283 int os::fork_and_exec(char* cmd, bool use_vfork_if_available) {
5284 char * argv[4];
5285 argv[0] = (char *)"sh";
5286 argv[1] = (char *)"-c";
5287 argv[2] = cmd;
5288 argv[3] = NULL;
5289
5290 // fork is async-safe, fork1 is not so can't use in signal handler
5291 pid_t pid;
5292 Thread* t = Thread::current_or_null_safe();
5293 if (t != NULL && t->is_inside_signal_handler()) {
5294 pid = fork();
5295 } else {
5296 pid = fork1();
5297 }
5298
5299 if (pid < 0) {
5300 // fork failed
5301 warning("fork failed: %s", os::strerror(errno));
5302 return -1;
5303
5304 } else if (pid == 0) {
5305 // child process
5306
5307 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
5308 execve("/usr/bin/sh", argv, environ);
5309
5310 // execve failed
5311 _exit(-1);
5312
5313 } else {
5314 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5315 // care about the actual exit code, for now.
5316
5317 int status;
5318
5319 // Wait for the child process to exit. This returns immediately if
5320 // the child has already exited. */
5321 while (waitpid(pid, &status, 0) < 0) {
5322 switch (errno) {
5323 case ECHILD: return 0;
5324 case EINTR: break;
5325 default: return -1;
5326 }
5327 }
5328
5329 if (WIFEXITED(status)) {
5330 // The child exited normally; get its exit code.
5331 return WEXITSTATUS(status);
5332 } else if (WIFSIGNALED(status)) {
5333 // The child exited because of a signal
5334 // The best value to return is 0x80 + signal number,
5335 // because that is what all Unix shells do, and because
5336 // it allows callers to distinguish between process exit and
5337 // process death by signal.
5338 return 0x80 + WTERMSIG(status);
5339 } else {
5340 // Unknown exit code; pass it through
5341 return status;
5342 }
5343 }
5344 }
5345
5346 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
5347 size_t res;
5348 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
5349 return res;
5350 }
5351
5352 int os::close(int fd) {
5353 return ::close(fd);
5354 }
5355
5356 int os::socket_close(int fd) {
5357 return ::close(fd);
5358 }
5359
5360 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
5361 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5362 "Assumed _thread_in_native");
5363 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags));
5364 }
5365
5366 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
5367 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5368 "Assumed _thread_in_native");
5369 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5370 }
5371
5372 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
5373 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5374 }
5375
5376 // As both poll and select can be interrupted by signals, we have to be
5377 // prepared to restart the system call after updating the timeout, unless
5378 // a poll() is done with timeout == -1, in which case we repeat with this
5379 // "wait forever" value.
5380
5381 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
5382 int _result;
5383 _result = ::connect(fd, him, len);
5384
5385 // On Solaris, when a connect() call is interrupted, the connection
5386 // can be established asynchronously (see 6343810). Subsequent calls
5387 // to connect() must check the errno value which has the semantic
5388 // described below (copied from the connect() man page). Handling
5389 // of asynchronously established connections is required for both
5390 // blocking and non-blocking sockets.
5391 // EINTR The connection attempt was interrupted
5392 // before any data arrived by the delivery of
5393 // a signal. The connection, however, will be
5394 // established asynchronously.
5395 //
5396 // EINPROGRESS The socket is non-blocking, and the connec-
5397 // tion cannot be completed immediately.
5398 //
5399 // EALREADY The socket is non-blocking, and a previous
5400 // connection attempt has not yet been com-
5401 // pleted.
5402 //
5403 // EISCONN The socket is already connected.
5404 if (_result == OS_ERR && errno == EINTR) {
5405 // restarting a connect() changes its errno semantics
5406 RESTARTABLE(::connect(fd, him, len), _result);
5407 // undo these changes
5408 if (_result == OS_ERR) {
5409 if (errno == EALREADY) {
5410 errno = EINPROGRESS; // fall through
5411 } else if (errno == EISCONN) {
5412 errno = 0;
5413 return OS_OK;
5414 }
5415 }
5416 }
5417 return _result;
5418 }
5419
5420 // Get the default path to the core file
5421 // Returns the length of the string
5422 int os::get_core_path(char* buffer, size_t bufferSize) {
5423 const char* p = get_current_directory(buffer, bufferSize);
5424
5425 if (p == NULL) {
5426 assert(p != NULL, "failed to get current directory");
5427 return 0;
5428 }
5429
5430 jio_snprintf(buffer, bufferSize, "%s/core or core.%d",
5431 p, current_process_id());
5432
5433 return strlen(buffer);
5434 }
5435
5436 #ifndef PRODUCT
5437 void TestReserveMemorySpecial_test() {
5438 // No tests available for this platform
5439 }
5440 #endif
5441
5442 bool os::start_debugging(char *buf, int buflen) {
5443 int len = (int)strlen(buf);
5444 char *p = &buf[len];
5445
5446 jio_snprintf(p, buflen-len,
5447 "\n\n"
5448 "Do you want to debug the problem?\n\n"
5449 "To debug, run 'dbx - %d'; then switch to thread " INTX_FORMAT "\n"
5450 "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n"
5451 "Otherwise, press RETURN to abort...",
5452 os::current_process_id(), os::current_thread_id());
5453
5454 bool yes = os::message_box("Unexpected Error", buf);
5455
5456 if (yes) {
5457 // yes, user asked VM to launch debugger
5458 jio_snprintf(buf, sizeof(buf), "dbx - %d", os::current_process_id());
5459
5460 os::fork_and_exec(buf);
5461 yes = false;
5462 }
5463 return yes;
5464 }