1 /*
2 * Copyright (c) 1997, 2019, 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 "memory/universe.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "os_share_solaris.hpp"
42 #include "os_solaris.inline.hpp"
43 #include "prims/jniFastGetField.hpp"
44 #include "prims/jvm_misc.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/atomic.hpp"
47 #include "runtime/extendedPC.hpp"
48 #include "runtime/globals.hpp"
49 #include "runtime/interfaceSupport.inline.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/mutexLocker.hpp"
53 #include "runtime/objectMonitor.hpp"
54 #include "runtime/orderAccess.hpp"
55 #include "runtime/osThread.hpp"
56 #include "runtime/perfMemory.hpp"
57 #include "runtime/sharedRuntime.hpp"
58 #include "runtime/statSampler.hpp"
59 #include "runtime/stubRoutines.hpp"
60 #include "runtime/thread.inline.hpp"
61 #include "runtime/threadCritical.hpp"
62 #include "runtime/timer.hpp"
63 #include "runtime/vm_version.hpp"
64 #include "semaphore_posix.hpp"
65 #include "services/attachListener.hpp"
66 #include "services/memTracker.hpp"
67 #include "services/runtimeService.hpp"
68 #include "utilities/align.hpp"
69 #include "utilities/decoder.hpp"
70 #include "utilities/defaultStream.hpp"
71 #include "utilities/events.hpp"
72 #include "utilities/growableArray.hpp"
73 #include "utilities/macros.hpp"
74 #include "utilities/vmError.hpp"
75
76 // put OS-includes here
77 # include <dlfcn.h>
78 # include <errno.h>
79 # include <exception>
80 # include <link.h>
81 # include <poll.h>
82 # include <pthread.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 if (!set_boot_path('/', ':')) {
589 vm_exit_during_initialization("Failed setting boot class path.", NULL);
590 }
591 }
592
593 // Where to look for native libraries.
594 {
595 // Use dlinfo() to determine the correct java.library.path.
596 //
597 // If we're launched by the Java launcher, and the user
598 // does not set java.library.path explicitly on the commandline,
599 // the Java launcher sets LD_LIBRARY_PATH for us and unsets
600 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case
601 // dlinfo returns LD_LIBRARY_PATH + crle settings (including
602 // /usr/lib), which is exactly what we want.
603 //
604 // If the user does set java.library.path, it completely
605 // overwrites this setting, and always has.
606 //
607 // If we're not launched by the Java launcher, we may
608 // get here with any/all of the LD_LIBRARY_PATH[_32|64]
609 // settings. Again, dlinfo does exactly what we want.
610
611 Dl_serinfo info_sz, *info = &info_sz;
612 Dl_serpath *path;
613 char *library_path;
614 char *common_path = buf;
615
616 // Determine search path count and required buffer size.
617 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) {
618 FREE_C_HEAP_ARRAY(char, buf);
619 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror());
620 }
621
622 // Allocate new buffer and initialize.
623 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal);
624 info->dls_size = info_sz.dls_size;
625 info->dls_cnt = info_sz.dls_cnt;
626
627 // Obtain search path information.
628 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) {
629 FREE_C_HEAP_ARRAY(char, buf);
630 FREE_C_HEAP_ARRAY(char, info);
631 vm_exit_during_initialization("dlinfo SERINFO request", dlerror());
632 }
633
634 path = &info->dls_serpath[0];
635
636 // Note: Due to a legacy implementation, most of the library path
637 // is set in the launcher. This was to accomodate linking restrictions
638 // on legacy Solaris implementations (which are no longer supported).
639 // Eventually, all the library path setting will be done here.
640 //
641 // However, to prevent the proliferation of improperly built native
642 // libraries, the new path component /usr/jdk/packages is added here.
643
644 // Construct the invariant part of ld_library_path.
645 sprintf(common_path, SYS_EXT_DIR "/lib");
646
647 // Struct size is more than sufficient for the path components obtained
648 // through the dlinfo() call, so only add additional space for the path
649 // components explicitly added here.
650 size_t library_path_size = info->dls_size + strlen(common_path);
651 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal);
652 library_path[0] = '\0';
653
654 // Construct the desired Java library path from the linker's library
655 // search path.
656 //
657 // For compatibility, it is optimal that we insert the additional path
658 // components specific to the Java VM after those components specified
659 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so
660 // infrastructure.
661 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it.
662 strcpy(library_path, common_path);
663 } else {
664 int inserted = 0;
665 int i;
666 for (i = 0; i < info->dls_cnt; i++, path++) {
667 uint_t flags = path->dls_flags & LA_SER_MASK;
668 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) {
669 strcat(library_path, common_path);
670 strcat(library_path, os::path_separator());
671 inserted = 1;
672 }
673 strcat(library_path, path->dls_name);
674 strcat(library_path, os::path_separator());
675 }
676 // Eliminate trailing path separator.
677 library_path[strlen(library_path)-1] = '\0';
678 }
679
680 // happens before argument parsing - can't use a trace flag
681 // tty->print_raw("init_system_properties_values: native lib path: ");
682 // tty->print_raw_cr(library_path);
683
684 // Callee copies into its own buffer.
685 Arguments::set_library_path(library_path);
686
687 FREE_C_HEAP_ARRAY(char, library_path);
688 FREE_C_HEAP_ARRAY(char, info);
689 }
690
691 // Extensions directories.
692 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home());
693 Arguments::set_ext_dirs(buf);
694
695 FREE_C_HEAP_ARRAY(char, buf);
696
697 #undef SYS_EXT_DIR
698 #undef EXTENSIONS_DIR
699 }
700
701 void os::breakpoint() {
702 BREAKPOINT;
703 }
704
705 bool os::Solaris::valid_stack_address(Thread* thread, address sp) {
706 address stackStart = (address)thread->stack_base();
707 address stackEnd = (address)(stackStart - (address)thread->stack_size());
708 if (sp < stackStart && sp >= stackEnd) return true;
709 return false;
710 }
711
712 extern "C" void breakpoint() {
713 // use debugger to set breakpoint here
714 }
715
716 static thread_t main_thread;
717
718 // Thread start routine for all newly created threads
719 extern "C" void* thread_native_entry(void* thread_addr) {
720
721 Thread* thread = (Thread*)thread_addr;
722
723 thread->record_stack_base_and_size();
724
725 // Try to randomize the cache line index of hot stack frames.
726 // This helps when threads of the same stack traces evict each other's
727 // cache lines. The threads can be either from the same JVM instance, or
728 // from different JVM instances. The benefit is especially true for
729 // processors with hyperthreading technology.
730 static int counter = 0;
731 int pid = os::current_process_id();
732 alloca(((pid ^ counter++) & 7) * 128);
733
734 int prio;
735
736 thread->initialize_thread_current();
737
738 OSThread* osthr = thread->osthread();
739
740 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound
741
742 log_info(os, thread)("Thread is alive (tid: " UINTX_FORMAT ").",
743 os::current_thread_id());
744
745 if (UseNUMA) {
746 int lgrp_id = os::numa_get_group_id();
747 if (lgrp_id != -1) {
748 thread->set_lgrp_id(lgrp_id);
749 }
750 }
751
752 // Our priority was set when we were created, and stored in the
753 // osthread, but couldn't be passed through to our LWP until now.
754 // So read back the priority and set it again.
755
756 if (osthr->thread_id() != -1) {
757 if (UseThreadPriorities) {
758 int prio = osthr->native_priority();
759 if (ThreadPriorityVerbose) {
760 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is "
761 INTPTR_FORMAT ", setting priority: %d\n",
762 osthr->thread_id(), osthr->lwp_id(), prio);
763 }
764 os::set_native_priority(thread, prio);
765 }
766 } else if (ThreadPriorityVerbose) {
767 warning("Can't set priority in _start routine, thread id hasn't been set\n");
768 }
769
770 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
771
772 // initialize signal mask for this thread
773 os::Solaris::hotspot_sigmask(thread);
774
775 os::Solaris::init_thread_fpu_state();
776 std::set_terminate(_handle_uncaught_cxx_exception);
777
778 thread->call_run();
779
780 // Note: at this point the thread object may already have deleted itself.
781 // Do not dereference it from here on out.
782
783 // One less thread is executing
784 // When the VMThread gets here, the main thread may have already exited
785 // which frees the CodeHeap containing the Atomic::dec code
786 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
787 Atomic::dec(&os::Solaris::_os_thread_count);
788 }
789
790 log_info(os, thread)("Thread finished (tid: " UINTX_FORMAT ").", os::current_thread_id());
791
792 if (UseDetachedThreads) {
793 thr_exit(NULL);
794 ShouldNotReachHere();
795 }
796 return NULL;
797 }
798
799 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) {
800 // Allocate the OSThread object
801 OSThread* osthread = new OSThread(NULL, NULL);
802 if (osthread == NULL) return NULL;
803
804 // Store info on the Solaris thread into the OSThread
805 osthread->set_thread_id(thread_id);
806 osthread->set_lwp_id(_lwp_self());
807
808 if (UseNUMA) {
809 int lgrp_id = os::numa_get_group_id();
810 if (lgrp_id != -1) {
811 thread->set_lgrp_id(lgrp_id);
812 }
813 }
814
815 if (ThreadPriorityVerbose) {
816 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n",
817 osthread->thread_id(), osthread->lwp_id());
818 }
819
820 // Initial thread state is INITIALIZED, not SUSPENDED
821 osthread->set_state(INITIALIZED);
822
823 return osthread;
824 }
825
826 void os::Solaris::hotspot_sigmask(Thread* thread) {
827 //Save caller's signal mask
828 sigset_t sigmask;
829 pthread_sigmask(SIG_SETMASK, NULL, &sigmask);
830 OSThread *osthread = thread->osthread();
831 osthread->set_caller_sigmask(sigmask);
832
833 pthread_sigmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL);
834 if (!ReduceSignalUsage) {
835 if (thread->is_VM_thread()) {
836 // Only the VM thread handles BREAK_SIGNAL ...
837 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL);
838 } else {
839 // ... all other threads block BREAK_SIGNAL
840 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked");
841 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL);
842 }
843 }
844 }
845
846 bool os::create_attached_thread(JavaThread* thread) {
847 #ifdef ASSERT
848 thread->verify_not_published();
849 #endif
850 OSThread* osthread = create_os_thread(thread, thr_self());
851 if (osthread == NULL) {
852 return false;
853 }
854
855 // Initial thread state is RUNNABLE
856 osthread->set_state(RUNNABLE);
857 thread->set_osthread(osthread);
858
859 // initialize signal mask for this thread
860 // and save the caller's signal mask
861 os::Solaris::hotspot_sigmask(thread);
862
863 log_info(os, thread)("Thread attached (tid: " UINTX_FORMAT ").",
864 os::current_thread_id());
865
866 return true;
867 }
868
869 bool os::create_main_thread(JavaThread* thread) {
870 #ifdef ASSERT
871 thread->verify_not_published();
872 #endif
873 if (_starting_thread == NULL) {
874 _starting_thread = create_os_thread(thread, main_thread);
875 if (_starting_thread == NULL) {
876 return false;
877 }
878 }
879
880 // The primodial thread is runnable from the start
881 _starting_thread->set_state(RUNNABLE);
882
883 thread->set_osthread(_starting_thread);
884
885 // initialize signal mask for this thread
886 // and save the caller's signal mask
887 os::Solaris::hotspot_sigmask(thread);
888
889 return true;
890 }
891
892 // Helper function to trace thread attributes, similar to os::Posix::describe_pthread_attr()
893 static char* describe_thr_create_attributes(char* buf, size_t buflen,
894 size_t stacksize, long flags) {
895 stringStream ss(buf, buflen);
896 ss.print("stacksize: " SIZE_FORMAT "k, ", stacksize / 1024);
897 ss.print("flags: ");
898 #define PRINT_FLAG(f) if (flags & f) ss.print( #f " ");
899 #define ALL(X) \
900 X(THR_SUSPENDED) \
901 X(THR_DETACHED) \
902 X(THR_BOUND) \
903 X(THR_NEW_LWP) \
904 X(THR_DAEMON)
905 ALL(PRINT_FLAG)
906 #undef ALL
907 #undef PRINT_FLAG
908 return buf;
909 }
910
911 // return default stack size for thr_type
912 size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
913 // default stack size when not specified by caller is 1M (2M for LP64)
914 size_t s = (BytesPerWord >> 2) * K * K;
915 return s;
916 }
917
918 bool os::create_thread(Thread* thread, ThreadType thr_type,
919 size_t req_stack_size) {
920 // Allocate the OSThread object
921 OSThread* osthread = new OSThread(NULL, NULL);
922 if (osthread == NULL) {
923 return false;
924 }
925
926 if (ThreadPriorityVerbose) {
927 char *thrtyp;
928 switch (thr_type) {
929 case vm_thread:
930 thrtyp = (char *)"vm";
931 break;
932 case cgc_thread:
933 thrtyp = (char *)"cgc";
934 break;
935 case pgc_thread:
936 thrtyp = (char *)"pgc";
937 break;
938 case java_thread:
939 thrtyp = (char *)"java";
940 break;
941 case compiler_thread:
942 thrtyp = (char *)"compiler";
943 break;
944 case watcher_thread:
945 thrtyp = (char *)"watcher";
946 break;
947 default:
948 thrtyp = (char *)"unknown";
949 break;
950 }
951 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp);
952 }
953
954 // calculate stack size if it's not specified by caller
955 size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size);
956
957 // Initial state is ALLOCATED but not INITIALIZED
958 osthread->set_state(ALLOCATED);
959
960 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) {
961 // We got lots of threads. Check if we still have some address space left.
962 // Need to be at least 5Mb of unreserved address space. We do check by
963 // trying to reserve some.
964 const size_t VirtualMemoryBangSize = 20*K*K;
965 char* mem = os::reserve_memory(VirtualMemoryBangSize);
966 if (mem == NULL) {
967 delete osthread;
968 return false;
969 } else {
970 // Release the memory again
971 os::release_memory(mem, VirtualMemoryBangSize);
972 }
973 }
974
975 // Setup osthread because the child thread may need it.
976 thread->set_osthread(osthread);
977
978 // Create the Solaris thread
979 thread_t tid = 0;
980 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED;
981 int status;
982
983 // Mark that we don't have an lwp or thread id yet.
984 // In case we attempt to set the priority before the thread starts.
985 osthread->set_lwp_id(-1);
986 osthread->set_thread_id(-1);
987
988 status = thr_create(NULL, stack_size, thread_native_entry, thread, flags, &tid);
989
990 char buf[64];
991 if (status == 0) {
992 log_info(os, thread)("Thread started (tid: " UINTX_FORMAT ", attributes: %s). ",
993 (uintx) tid, describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags));
994 } else {
995 log_warning(os, thread)("Failed to start thread - thr_create failed (%s) for attributes: %s.",
996 os::errno_name(status), describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags));
997 // Log some OS information which might explain why creating the thread failed.
998 log_info(os, thread)("Number of threads approx. running in the VM: %d", Threads::number_of_threads());
999 LogStream st(Log(os, thread)::info());
1000 os::Posix::print_rlimit_info(&st);
1001 os::print_memory_info(&st);
1002 }
1003
1004 if (status != 0) {
1005 thread->set_osthread(NULL);
1006 // Need to clean up stuff we've allocated so far
1007 delete osthread;
1008 return false;
1009 }
1010
1011 Atomic::inc(&os::Solaris::_os_thread_count);
1012
1013 // Store info on the Solaris thread into the OSThread
1014 osthread->set_thread_id(tid);
1015
1016 // Remember that we created this thread so we can set priority on it
1017 osthread->set_vm_created();
1018
1019 // Most thread types will set an explicit priority before starting the thread,
1020 // but for those that don't we need a valid value to read back in thread_native_entry.
1021 osthread->set_native_priority(NormPriority);
1022
1023 // Initial thread state is INITIALIZED, not SUSPENDED
1024 osthread->set_state(INITIALIZED);
1025
1026 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
1027 return true;
1028 }
1029
1030 debug_only(static bool signal_sets_initialized = false);
1031 static sigset_t unblocked_sigs, vm_sigs;
1032
1033 void os::Solaris::signal_sets_init() {
1034 // Should also have an assertion stating we are still single-threaded.
1035 assert(!signal_sets_initialized, "Already initialized");
1036 // Fill in signals that are necessarily unblocked for all threads in
1037 // the VM. Currently, we unblock the following signals:
1038 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
1039 // by -Xrs (=ReduceSignalUsage));
1040 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
1041 // other threads. The "ReduceSignalUsage" boolean tells us not to alter
1042 // the dispositions or masks wrt these signals.
1043 // Programs embedding the VM that want to use the above signals for their
1044 // own purposes must, at this time, use the "-Xrs" option to prevent
1045 // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
1046 // (See bug 4345157, and other related bugs).
1047 // In reality, though, unblocking these signals is really a nop, since
1048 // these signals are not blocked by default.
1049 sigemptyset(&unblocked_sigs);
1050 sigaddset(&unblocked_sigs, SIGILL);
1051 sigaddset(&unblocked_sigs, SIGSEGV);
1052 sigaddset(&unblocked_sigs, SIGBUS);
1053 sigaddset(&unblocked_sigs, SIGFPE);
1054 sigaddset(&unblocked_sigs, ASYNC_SIGNAL);
1055
1056 if (!ReduceSignalUsage) {
1057 if (!os::Posix::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
1058 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
1059 }
1060 if (!os::Posix::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
1061 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
1062 }
1063 if (!os::Posix::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
1064 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
1065 }
1066 }
1067 // Fill in signals that are blocked by all but the VM thread.
1068 sigemptyset(&vm_sigs);
1069 if (!ReduceSignalUsage) {
1070 sigaddset(&vm_sigs, BREAK_SIGNAL);
1071 }
1072 debug_only(signal_sets_initialized = true);
1073
1074 // For diagnostics only used in run_periodic_checks
1075 sigemptyset(&check_signal_done);
1076 }
1077
1078 // These are signals that are unblocked while a thread is running Java.
1079 // (For some reason, they get blocked by default.)
1080 sigset_t* os::Solaris::unblocked_signals() {
1081 assert(signal_sets_initialized, "Not initialized");
1082 return &unblocked_sigs;
1083 }
1084
1085 // These are the signals that are blocked while a (non-VM) thread is
1086 // running Java. Only the VM thread handles these signals.
1087 sigset_t* os::Solaris::vm_signals() {
1088 assert(signal_sets_initialized, "Not initialized");
1089 return &vm_sigs;
1090 }
1091
1092 // CR 7190089: on Solaris, primordial thread's stack needs adjusting.
1093 // Without the adjustment, stack size is incorrect if stack is set to unlimited (ulimit -s unlimited).
1094 void os::Solaris::correct_stack_boundaries_for_primordial_thread(Thread* thr) {
1095 assert(is_primordial_thread(), "Call only for primordial thread");
1096
1097 JavaThread* jt = (JavaThread *)thr;
1098 assert(jt != NULL, "Sanity check");
1099 size_t stack_size;
1100 address base = jt->stack_base();
1101 if (Arguments::created_by_java_launcher()) {
1102 // Use 2MB to allow for Solaris 7 64 bit mode.
1103 stack_size = JavaThread::stack_size_at_create() == 0
1104 ? 2048*K : JavaThread::stack_size_at_create();
1105
1106 // There are rare cases when we may have already used more than
1107 // the basic stack size allotment before this method is invoked.
1108 // Attempt to allow for a normally sized java_stack.
1109 size_t current_stack_offset = (size_t)(base - (address)&stack_size);
1110 stack_size += ReservedSpace::page_align_size_down(current_stack_offset);
1111 } else {
1112 // 6269555: If we were not created by a Java launcher, i.e. if we are
1113 // running embedded in a native application, treat the primordial thread
1114 // as much like a native attached thread as possible. This means using
1115 // the current stack size from thr_stksegment(), unless it is too large
1116 // to reliably setup guard pages. A reasonable max size is 8MB.
1117 size_t current_size = os::current_stack_size();
1118 // This should never happen, but just in case....
1119 if (current_size == 0) current_size = 2 * K * K;
1120 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size;
1121 }
1122 address bottom = align_up(base - stack_size, os::vm_page_size());;
1123 stack_size = (size_t)(base - bottom);
1124
1125 assert(stack_size > 0, "Stack size calculation problem");
1126
1127 if (stack_size > jt->stack_size()) {
1128 #ifndef PRODUCT
1129 struct rlimit limits;
1130 getrlimit(RLIMIT_STACK, &limits);
1131 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur);
1132 assert(size >= jt->stack_size(), "Stack size problem in main thread");
1133 #endif
1134 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n"
1135 "(Stack sizes are rounded up to a multiple of the system page size.)\n"
1136 "See limit(1) to increase the stack size limit.",
1137 stack_size / K, jt->stack_size() / K);
1138 vm_exit(1);
1139 }
1140 assert(jt->stack_size() >= stack_size,
1141 "Attempt to map more stack than was allocated");
1142 jt->set_stack_size(stack_size);
1143
1144 }
1145
1146
1147
1148 // Free Solaris resources related to the OSThread
1149 void os::free_thread(OSThread* osthread) {
1150 assert(osthread != NULL, "os::free_thread but osthread not set");
1151
1152 // We are told to free resources of the argument thread,
1153 // but we can only really operate on the current thread.
1154 assert(Thread::current()->osthread() == osthread,
1155 "os::free_thread but not current thread");
1156
1157 // Restore caller's signal mask
1158 sigset_t sigmask = osthread->caller_sigmask();
1159 pthread_sigmask(SIG_SETMASK, &sigmask, NULL);
1160
1161 delete osthread;
1162 }
1163
1164 void os::pd_start_thread(Thread* thread) {
1165 int status = thr_continue(thread->osthread()->thread_id());
1166 assert_status(status == 0, status, "thr_continue failed");
1167 }
1168
1169
1170 intx os::current_thread_id() {
1171 return (intx)thr_self();
1172 }
1173
1174 static pid_t _initial_pid = 0;
1175
1176 int os::current_process_id() {
1177 return (int)(_initial_pid ? _initial_pid : getpid());
1178 }
1179
1180 // gethrtime() should be monotonic according to the documentation,
1181 // but some virtualized platforms are known to break this guarantee.
1182 // getTimeNanos() must be guaranteed not to move backwards, so we
1183 // are forced to add a check here.
1184 inline hrtime_t getTimeNanos() {
1185 const hrtime_t now = gethrtime();
1186 const hrtime_t prev = max_hrtime;
1187 if (now <= prev) {
1188 return prev; // same or retrograde time;
1189 }
1190 const hrtime_t obsv = Atomic::cmpxchg(now, &max_hrtime, prev);
1191 assert(obsv >= prev, "invariant"); // Monotonicity
1192 // If the CAS succeeded then we're done and return "now".
1193 // If the CAS failed and the observed value "obsv" is >= now then
1194 // we should return "obsv". If the CAS failed and now > obsv > prv then
1195 // some other thread raced this thread and installed a new value, in which case
1196 // we could either (a) retry the entire operation, (b) retry trying to install now
1197 // or (c) just return obsv. We use (c). No loop is required although in some cases
1198 // we might discard a higher "now" value in deference to a slightly lower but freshly
1199 // installed obsv value. That's entirely benign -- it admits no new orderings compared
1200 // to (a) or (b) -- and greatly reduces coherence traffic.
1201 // We might also condition (c) on the magnitude of the delta between obsv and now.
1202 // Avoiding excessive CAS operations to hot RW locations is critical.
1203 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate
1204 return (prev == obsv) ? now : obsv;
1205 }
1206
1207 // Time since start-up in seconds to a fine granularity.
1208 // Used by VMSelfDestructTimer and the MemProfiler.
1209 double os::elapsedTime() {
1210 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz;
1211 }
1212
1213 jlong os::elapsed_counter() {
1214 return (jlong)(getTimeNanos() - first_hrtime);
1215 }
1216
1217 jlong os::elapsed_frequency() {
1218 return hrtime_hz;
1219 }
1220
1221 // Return the real, user, and system times in seconds from an
1222 // arbitrary fixed point in the past.
1223 bool os::getTimesSecs(double* process_real_time,
1224 double* process_user_time,
1225 double* process_system_time) {
1226 struct tms ticks;
1227 clock_t real_ticks = times(&ticks);
1228
1229 if (real_ticks == (clock_t) (-1)) {
1230 return false;
1231 } else {
1232 double ticks_per_second = (double) clock_tics_per_sec;
1233 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
1234 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
1235 // For consistency return the real time from getTimeNanos()
1236 // converted to seconds.
1237 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS);
1238
1239 return true;
1240 }
1241 }
1242
1243 bool os::supports_vtime() { return true; }
1244 bool os::enable_vtime() { return false; }
1245 bool os::vtime_enabled() { return false; }
1246
1247 double os::elapsedVTime() {
1248 return (double)gethrvtime() / (double)hrtime_hz;
1249 }
1250
1251 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis
1252 jlong os::javaTimeMillis() {
1253 timeval t;
1254 if (gettimeofday(&t, NULL) == -1) {
1255 fatal("os::javaTimeMillis: gettimeofday (%s)", os::strerror(errno));
1256 }
1257 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000;
1258 }
1259
1260 // Must return seconds+nanos since Jan 1 1970. This must use the same
1261 // time source as javaTimeMillis and can't use get_nsec_fromepoch as
1262 // we need better than 1ms accuracy
1263 void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) {
1264 timeval t;
1265 if (gettimeofday(&t, NULL) == -1) {
1266 fatal("os::javaTimeSystemUTC: gettimeofday (%s)", os::strerror(errno));
1267 }
1268 seconds = jlong(t.tv_sec);
1269 nanos = jlong(t.tv_usec) * 1000;
1270 }
1271
1272
1273 jlong os::javaTimeNanos() {
1274 return (jlong)getTimeNanos();
1275 }
1276
1277 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
1278 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits
1279 info_ptr->may_skip_backward = false; // not subject to resetting or drifting
1280 info_ptr->may_skip_forward = false; // not subject to resetting or drifting
1281 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
1282 }
1283
1284 char * os::local_time_string(char *buf, size_t buflen) {
1285 struct tm t;
1286 time_t long_time;
1287 time(&long_time);
1288 localtime_r(&long_time, &t);
1289 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
1290 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
1291 t.tm_hour, t.tm_min, t.tm_sec);
1292 return buf;
1293 }
1294
1295 // Note: os::shutdown() might be called very early during initialization, or
1296 // called from signal handler. Before adding something to os::shutdown(), make
1297 // sure it is async-safe and can handle partially initialized VM.
1298 void os::shutdown() {
1299
1300 // allow PerfMemory to attempt cleanup of any persistent resources
1301 perfMemory_exit();
1302
1303 // needs to remove object in file system
1304 AttachListener::abort();
1305
1306 // flush buffered output, finish log files
1307 ostream_abort();
1308
1309 // Check for abort hook
1310 abort_hook_t abort_hook = Arguments::abort_hook();
1311 if (abort_hook != NULL) {
1312 abort_hook();
1313 }
1314 }
1315
1316 // Note: os::abort() might be called very early during initialization, or
1317 // called from signal handler. Before adding something to os::abort(), make
1318 // sure it is async-safe and can handle partially initialized VM.
1319 void os::abort(bool dump_core, void* siginfo, const void* context) {
1320 os::shutdown();
1321 if (dump_core) {
1322 #ifndef PRODUCT
1323 fdStream out(defaultStream::output_fd());
1324 out.print_raw("Current thread is ");
1325 char buf[16];
1326 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
1327 out.print_raw_cr(buf);
1328 out.print_raw_cr("Dumping core ...");
1329 #endif
1330 ::abort(); // dump core (for debugging)
1331 }
1332
1333 ::exit(1);
1334 }
1335
1336 // Die immediately, no exit hook, no abort hook, no cleanup.
1337 // Dump a core file, if possible, for debugging.
1338 void os::die() {
1339 if (TestUnresponsiveErrorHandler && !CreateCoredumpOnCrash) {
1340 // For TimeoutInErrorHandlingTest.java, we just kill the VM
1341 // and don't take the time to generate a core file.
1342 os::signal_raise(SIGKILL);
1343 } else {
1344 ::abort();
1345 }
1346 }
1347
1348 // DLL functions
1349
1350 const char* os::dll_file_extension() { return ".so"; }
1351
1352 // This must be hard coded because it's the system's temporary
1353 // directory not the java application's temp directory, ala java.io.tmpdir.
1354 const char* os::get_temp_directory() { return "/tmp"; }
1355
1356 // check if addr is inside libjvm.so
1357 bool os::address_is_in_vm(address addr) {
1358 static address libjvm_base_addr;
1359 Dl_info dlinfo;
1360
1361 if (libjvm_base_addr == NULL) {
1362 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
1363 libjvm_base_addr = (address)dlinfo.dli_fbase;
1364 }
1365 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
1366 }
1367
1368 if (dladdr((void *)addr, &dlinfo) != 0) {
1369 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
1370 }
1371
1372 return false;
1373 }
1374
1375 typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int);
1376 static dladdr1_func_type dladdr1_func = NULL;
1377
1378 bool os::dll_address_to_function_name(address addr, char *buf,
1379 int buflen, int * offset,
1380 bool demangle) {
1381 // buf is not optional, but offset is optional
1382 assert(buf != NULL, "sanity check");
1383
1384 Dl_info dlinfo;
1385
1386 // dladdr1_func was initialized in os::init()
1387 if (dladdr1_func != NULL) {
1388 // yes, we have dladdr1
1389
1390 // Support for dladdr1 is checked at runtime; it may be
1391 // available even if the vm is built on a machine that does
1392 // not have dladdr1 support. Make sure there is a value for
1393 // RTLD_DL_SYMENT.
1394 #ifndef RTLD_DL_SYMENT
1395 #define RTLD_DL_SYMENT 1
1396 #endif
1397 #ifdef _LP64
1398 Elf64_Sym * info;
1399 #else
1400 Elf32_Sym * info;
1401 #endif
1402 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info,
1403 RTLD_DL_SYMENT) != 0) {
1404 // see if we have a matching symbol that covers our address
1405 if (dlinfo.dli_saddr != NULL &&
1406 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) {
1407 if (dlinfo.dli_sname != NULL) {
1408 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) {
1409 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
1410 }
1411 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1412 return true;
1413 }
1414 }
1415 // no matching symbol so try for just file info
1416 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1417 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1418 buf, buflen, offset, dlinfo.dli_fname, demangle)) {
1419 return true;
1420 }
1421 }
1422 }
1423 buf[0] = '\0';
1424 if (offset != NULL) *offset = -1;
1425 return false;
1426 }
1427
1428 // no, only dladdr is available
1429 if (dladdr((void *)addr, &dlinfo) != 0) {
1430 // see if we have a matching symbol
1431 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
1432 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) {
1433 jio_snprintf(buf, buflen, dlinfo.dli_sname);
1434 }
1435 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
1436 return true;
1437 }
1438 // no matching symbol so try for just file info
1439 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
1440 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
1441 buf, buflen, offset, dlinfo.dli_fname, demangle)) {
1442 return true;
1443 }
1444 }
1445 }
1446 buf[0] = '\0';
1447 if (offset != NULL) *offset = -1;
1448 return false;
1449 }
1450
1451 bool os::dll_address_to_library_name(address addr, char* buf,
1452 int buflen, int* offset) {
1453 // buf is not optional, but offset is optional
1454 assert(buf != NULL, "sanity check");
1455
1456 Dl_info dlinfo;
1457
1458 if (dladdr((void*)addr, &dlinfo) != 0) {
1459 if (dlinfo.dli_fname != NULL) {
1460 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
1461 }
1462 if (dlinfo.dli_fbase != NULL && offset != NULL) {
1463 *offset = addr - (address)dlinfo.dli_fbase;
1464 }
1465 return true;
1466 }
1467
1468 buf[0] = '\0';
1469 if (offset) *offset = -1;
1470 return false;
1471 }
1472
1473 int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) {
1474 Dl_info dli;
1475 // Sanity check?
1476 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 ||
1477 dli.dli_fname == NULL) {
1478 return 1;
1479 }
1480
1481 void * handle = dlopen(dli.dli_fname, RTLD_LAZY);
1482 if (handle == NULL) {
1483 return 1;
1484 }
1485
1486 Link_map *map;
1487 dlinfo(handle, RTLD_DI_LINKMAP, &map);
1488 if (map == NULL) {
1489 dlclose(handle);
1490 return 1;
1491 }
1492
1493 while (map->l_prev != NULL) {
1494 map = map->l_prev;
1495 }
1496
1497 while (map != NULL) {
1498 // Iterate through all map entries and call callback with fields of interest
1499 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) {
1500 dlclose(handle);
1501 return 1;
1502 }
1503 map = map->l_next;
1504 }
1505
1506 dlclose(handle);
1507 return 0;
1508 }
1509
1510 int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) {
1511 outputStream * out = (outputStream *) param;
1512 out->print_cr(PTR_FORMAT " \t%s", base_address, name);
1513 return 0;
1514 }
1515
1516 void os::print_dll_info(outputStream * st) {
1517 st->print_cr("Dynamic libraries:"); st->flush();
1518 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) {
1519 st->print_cr("Error: Cannot print dynamic libraries.");
1520 }
1521 }
1522
1523 static void change_endianness(Elf32_Half& val) {
1524 unsigned char *ptr = (unsigned char *)&val;
1525 unsigned char swp = ptr[0];
1526 ptr[0] = ptr[1];
1527 ptr[1] = swp;
1528 }
1529
1530 // Loads .dll/.so and
1531 // in case of error it checks if .dll/.so was built for the
1532 // same architecture as Hotspot is running on
1533
1534 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) {
1535 log_info(os)("attempting shared library load of %s", filename);
1536
1537 void * result= ::dlopen(filename, RTLD_LAZY);
1538 if (result != NULL) {
1539 // Successful loading
1540 Events::log(NULL, "Loaded shared library %s", filename);
1541 log_info(os)("shared library load of %s was successful", filename);
1542 return result;
1543 }
1544
1545 Elf32_Ehdr elf_head;
1546 const char* error_report = ::dlerror();
1547 if (error_report == NULL) {
1548 error_report = "dlerror returned no error description";
1549 }
1550 if (ebuf != NULL && ebuflen > 0) {
1551 ::strncpy(ebuf, error_report, ebuflen-1);
1552 ebuf[ebuflen-1]='\0';
1553 }
1554
1555 Events::log(NULL, "Loading shared library %s failed, %s", filename, error_report);
1556 log_info(os)("shared library load of %s failed, %s", filename, error_report);
1557
1558 int diag_msg_max_length=ebuflen-strlen(ebuf);
1559 char* diag_msg_buf=ebuf+strlen(ebuf);
1560
1561 if (diag_msg_max_length==0) {
1562 // No more space in ebuf for additional diagnostics message
1563 return NULL;
1564 }
1565
1566
1567 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
1568
1569 if (file_descriptor < 0) {
1570 // Can't open library, report dlerror() message
1571 return NULL;
1572 }
1573
1574 bool failed_to_read_elf_head=
1575 (sizeof(elf_head)!=
1576 (::read(file_descriptor, &elf_head,sizeof(elf_head))));
1577
1578 ::close(file_descriptor);
1579 if (failed_to_read_elf_head) {
1580 // file i/o error - report dlerror() msg
1581 return NULL;
1582 }
1583
1584 if (elf_head.e_ident[EI_DATA] != LITTLE_ENDIAN_ONLY(ELFDATA2LSB) BIG_ENDIAN_ONLY(ELFDATA2MSB)) {
1585 // handle invalid/out of range endianness values
1586 if (elf_head.e_ident[EI_DATA] == 0 || elf_head.e_ident[EI_DATA] > 2) {
1587 return NULL;
1588 }
1589 change_endianness(elf_head.e_machine);
1590 }
1591
1592 typedef struct {
1593 Elf32_Half code; // Actual value as defined in elf.h
1594 Elf32_Half compat_class; // Compatibility of archs at VM's sense
1595 unsigned char elf_class; // 32 or 64 bit
1596 unsigned char endianess; // MSB or LSB
1597 char* name; // String representation
1598 } arch_t;
1599
1600 #ifndef EM_AARCH64
1601 #define EM_AARCH64 183 /* ARM AARCH64 */
1602 #endif
1603
1604 static const arch_t arch_array[]={
1605 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1606 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
1607 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
1608 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
1609 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1610 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
1611 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
1612 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
1613 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
1614 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"},
1615 // we only support 64 bit z architecture
1616 {EM_S390, EM_S390, ELFCLASS64, ELFDATA2MSB, (char*)"IBM System/390"},
1617 {EM_AARCH64, EM_AARCH64, ELFCLASS64, ELFDATA2LSB, (char*)"AARCH64"}
1618 };
1619
1620 #if (defined IA32)
1621 static Elf32_Half running_arch_code=EM_386;
1622 #elif (defined AMD64)
1623 static Elf32_Half running_arch_code=EM_X86_64;
1624 #elif (defined IA64)
1625 static Elf32_Half running_arch_code=EM_IA_64;
1626 #elif (defined __sparc) && (defined _LP64)
1627 static Elf32_Half running_arch_code=EM_SPARCV9;
1628 #elif (defined __sparc) && (!defined _LP64)
1629 static Elf32_Half running_arch_code=EM_SPARC;
1630 #elif (defined __powerpc64__)
1631 static Elf32_Half running_arch_code=EM_PPC64;
1632 #elif (defined __powerpc__)
1633 static Elf32_Half running_arch_code=EM_PPC;
1634 #elif (defined ARM)
1635 static Elf32_Half running_arch_code=EM_ARM;
1636 #else
1637 #error Method os::dll_load requires that one of following is defined:\
1638 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM
1639 #endif
1640
1641 // Identify compatibility class for VM's architecture and library's architecture
1642 // Obtain string descriptions for architectures
1643
1644 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
1645 int running_arch_index=-1;
1646
1647 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) {
1648 if (running_arch_code == arch_array[i].code) {
1649 running_arch_index = i;
1650 }
1651 if (lib_arch.code == arch_array[i].code) {
1652 lib_arch.compat_class = arch_array[i].compat_class;
1653 lib_arch.name = arch_array[i].name;
1654 }
1655 }
1656
1657 assert(running_arch_index != -1,
1658 "Didn't find running architecture code (running_arch_code) in arch_array");
1659 if (running_arch_index == -1) {
1660 // Even though running architecture detection failed
1661 // we may still continue with reporting dlerror() message
1662 return NULL;
1663 }
1664
1665 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
1666 if (lib_arch.name != NULL) {
1667 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1668 " (Possible cause: can't load %s .so on a %s platform)",
1669 lib_arch.name, arch_array[running_arch_index].name);
1670 } else {
1671 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1672 " (Possible cause: can't load this .so (machine code=0x%x) on a %s platform)",
1673 lib_arch.code, arch_array[running_arch_index].name);
1674 }
1675 return NULL;
1676 }
1677
1678 if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
1679 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
1680 return NULL;
1681 }
1682
1683 // ELF file class/capacity : 0 - invalid, 1 - 32bit, 2 - 64bit
1684 if (lib_arch.elf_class > 2 || lib_arch.elf_class < 1) {
1685 ::snprintf(diag_msg_buf, diag_msg_max_length-1, " (Possible cause: invalid ELF file class)");
1686 return NULL;
1687 }
1688
1689 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
1690 ::snprintf(diag_msg_buf, diag_msg_max_length-1,
1691 " (Possible cause: architecture word width mismatch, can't load %d-bit .so on a %d-bit platform)",
1692 (int) lib_arch.elf_class * 32, arch_array[running_arch_index].elf_class * 32);
1693 return NULL;
1694 }
1695
1696 return NULL;
1697 }
1698
1699 void* os::dll_lookup(void* handle, const char* name) {
1700 return dlsym(handle, name);
1701 }
1702
1703 void* os::get_default_process_handle() {
1704 return (void*)::dlopen(NULL, RTLD_LAZY);
1705 }
1706
1707 static inline time_t get_mtime(const char* filename) {
1708 struct stat st;
1709 int ret = os::stat(filename, &st);
1710 assert(ret == 0, "failed to stat() file '%s': %s", filename, os::strerror(errno));
1711 return st.st_mtime;
1712 }
1713
1714 int os::compare_file_modified_times(const char* file1, const char* file2) {
1715 time_t t1 = get_mtime(file1);
1716 time_t t2 = get_mtime(file2);
1717 return t1 - t2;
1718 }
1719
1720 static bool _print_ascii_file(const char* filename, outputStream* st) {
1721 int fd = ::open(filename, O_RDONLY);
1722 if (fd == -1) {
1723 return false;
1724 }
1725
1726 char buf[32];
1727 int bytes;
1728 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
1729 st->print_raw(buf, bytes);
1730 }
1731
1732 ::close(fd);
1733
1734 return true;
1735 }
1736
1737 void os::print_os_info_brief(outputStream* st) {
1738 os::Solaris::print_distro_info(st);
1739
1740 os::Posix::print_uname_info(st);
1741
1742 os::Solaris::print_libversion_info(st);
1743 }
1744
1745 void os::print_os_info(outputStream* st) {
1746 st->print("OS:");
1747
1748 os::Solaris::print_distro_info(st);
1749
1750 os::Posix::print_uname_info(st);
1751
1752 os::Solaris::print_libversion_info(st);
1753
1754 os::Posix::print_rlimit_info(st);
1755
1756 os::Posix::print_load_average(st);
1757 }
1758
1759 void os::Solaris::print_distro_info(outputStream* st) {
1760 if (!_print_ascii_file("/etc/release", st)) {
1761 st->print("Solaris");
1762 }
1763 st->cr();
1764 }
1765
1766 void os::get_summary_os_info(char* buf, size_t buflen) {
1767 strncpy(buf, "Solaris", buflen); // default to plain solaris
1768 FILE* fp = fopen("/etc/release", "r");
1769 if (fp != NULL) {
1770 char tmp[256];
1771 // Only get the first line and chop out everything but the os name.
1772 if (fgets(tmp, sizeof(tmp), fp)) {
1773 char* ptr = tmp;
1774 // skip past whitespace characters
1775 while (*ptr != '\0' && (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')) ptr++;
1776 if (*ptr != '\0') {
1777 char* nl = strchr(ptr, '\n');
1778 if (nl != NULL) *nl = '\0';
1779 strncpy(buf, ptr, buflen);
1780 }
1781 }
1782 fclose(fp);
1783 }
1784 }
1785
1786 void os::Solaris::print_libversion_info(outputStream* st) {
1787 st->print(" (T2 libthread)");
1788 st->cr();
1789 }
1790
1791 static bool check_addr0(outputStream* st) {
1792 jboolean status = false;
1793 const int read_chunk = 200;
1794 int ret = 0;
1795 int nmap = 0;
1796 int fd = ::open("/proc/self/map",O_RDONLY);
1797 if (fd >= 0) {
1798 prmap_t *p = NULL;
1799 char *mbuff = (char *) calloc(read_chunk, sizeof(prmap_t));
1800 if (NULL == mbuff) {
1801 ::close(fd);
1802 return status;
1803 }
1804 while ((ret = ::read(fd, mbuff, read_chunk*sizeof(prmap_t))) > 0) {
1805 //check if read() has not read partial data
1806 if( 0 != ret % sizeof(prmap_t)){
1807 break;
1808 }
1809 nmap = ret / sizeof(prmap_t);
1810 p = (prmap_t *)mbuff;
1811 for(int i = 0; i < nmap; i++){
1812 if (p->pr_vaddr == 0x0) {
1813 st->print("Warning: Address: " PTR_FORMAT ", Size: " SIZE_FORMAT "K, ",p->pr_vaddr, p->pr_size/1024);
1814 st->print("Mapped file: %s, ", p->pr_mapname[0] == '\0' ? "None" : p->pr_mapname);
1815 st->print("Access: ");
1816 st->print("%s",(p->pr_mflags & MA_READ) ? "r" : "-");
1817 st->print("%s",(p->pr_mflags & MA_WRITE) ? "w" : "-");
1818 st->print("%s",(p->pr_mflags & MA_EXEC) ? "x" : "-");
1819 st->cr();
1820 status = true;
1821 }
1822 p++;
1823 }
1824 }
1825 free(mbuff);
1826 ::close(fd);
1827 }
1828 return status;
1829 }
1830
1831 void os::get_summary_cpu_info(char* buf, size_t buflen) {
1832 // Get MHz with system call. We don't seem to already have this.
1833 processor_info_t stats;
1834 processorid_t id = getcpuid();
1835 int clock = 0;
1836 if (processor_info(id, &stats) != -1) {
1837 clock = stats.pi_clock; // pi_processor_type isn't more informative than below
1838 }
1839 #ifdef AMD64
1840 snprintf(buf, buflen, "x86 64 bit %d MHz", clock);
1841 #else
1842 // must be sparc
1843 snprintf(buf, buflen, "Sparcv9 64 bit %d MHz", clock);
1844 #endif
1845 }
1846
1847 void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) {
1848 // Nothing to do for now.
1849 }
1850
1851 void os::print_memory_info(outputStream* st) {
1852 st->print("Memory:");
1853 st->print(" %dk page", os::vm_page_size()>>10);
1854 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10);
1855 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10);
1856 st->cr();
1857 (void) check_addr0(st);
1858 }
1859
1860 // Moved from whole group, because we need them here for diagnostic
1861 // prints.
1862 static int Maxsignum = 0;
1863 static int *ourSigFlags = NULL;
1864
1865 int os::Solaris::get_our_sigflags(int sig) {
1866 assert(ourSigFlags!=NULL, "signal data structure not initialized");
1867 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
1868 return ourSigFlags[sig];
1869 }
1870
1871 void os::Solaris::set_our_sigflags(int sig, int flags) {
1872 assert(ourSigFlags!=NULL, "signal data structure not initialized");
1873 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range");
1874 ourSigFlags[sig] = flags;
1875 }
1876
1877
1878 static const char* get_signal_handler_name(address handler,
1879 char* buf, int buflen) {
1880 int offset;
1881 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
1882 if (found) {
1883 // skip directory names
1884 const char *p1, *p2;
1885 p1 = buf;
1886 size_t len = strlen(os::file_separator());
1887 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
1888 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
1889 } else {
1890 jio_snprintf(buf, buflen, PTR_FORMAT, handler);
1891 }
1892 return buf;
1893 }
1894
1895 static void print_signal_handler(outputStream* st, int sig,
1896 char* buf, size_t buflen) {
1897 struct sigaction sa;
1898
1899 sigaction(sig, NULL, &sa);
1900
1901 st->print("%s: ", os::exception_name(sig, buf, buflen));
1902
1903 address handler = (sa.sa_flags & SA_SIGINFO)
1904 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
1905 : CAST_FROM_FN_PTR(address, sa.sa_handler);
1906
1907 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
1908 st->print("SIG_DFL");
1909 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
1910 st->print("SIG_IGN");
1911 } else {
1912 st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
1913 }
1914
1915 st->print(", sa_mask[0]=");
1916 os::Posix::print_signal_set_short(st, &sa.sa_mask);
1917
1918 address rh = VMError::get_resetted_sighandler(sig);
1919 // May be, handler was resetted by VMError?
1920 if (rh != NULL) {
1921 handler = rh;
1922 sa.sa_flags = VMError::get_resetted_sigflags(sig);
1923 }
1924
1925 st->print(", sa_flags=");
1926 os::Posix::print_sa_flags(st, sa.sa_flags);
1927
1928 // Check: is it our handler?
1929 if (handler == CAST_FROM_FN_PTR(address, signalHandler)) {
1930 // It is our signal handler
1931 // check for flags
1932 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) {
1933 st->print(
1934 ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
1935 os::Solaris::get_our_sigflags(sig));
1936 }
1937 }
1938 st->cr();
1939 }
1940
1941 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
1942 st->print_cr("Signal Handlers:");
1943 print_signal_handler(st, SIGSEGV, buf, buflen);
1944 print_signal_handler(st, SIGBUS , buf, buflen);
1945 print_signal_handler(st, SIGFPE , buf, buflen);
1946 print_signal_handler(st, SIGPIPE, buf, buflen);
1947 print_signal_handler(st, SIGXFSZ, buf, buflen);
1948 print_signal_handler(st, SIGILL , buf, buflen);
1949 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen);
1950 print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
1951 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen);
1952 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
1953 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen);
1954 }
1955
1956 static char saved_jvm_path[MAXPATHLEN] = { 0 };
1957
1958 // Find the full path to the current module, libjvm.so
1959 void os::jvm_path(char *buf, jint buflen) {
1960 // Error checking.
1961 if (buflen < MAXPATHLEN) {
1962 assert(false, "must use a large-enough buffer");
1963 buf[0] = '\0';
1964 return;
1965 }
1966 // Lazy resolve the path to current module.
1967 if (saved_jvm_path[0] != 0) {
1968 strcpy(buf, saved_jvm_path);
1969 return;
1970 }
1971
1972 Dl_info dlinfo;
1973 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo);
1974 assert(ret != 0, "cannot locate libjvm");
1975 if (ret != 0 && dlinfo.dli_fname != NULL) {
1976 if (os::Posix::realpath((char *)dlinfo.dli_fname, buf, buflen) == NULL) {
1977 return;
1978 }
1979 } else {
1980 buf[0] = '\0';
1981 return;
1982 }
1983
1984 if (Arguments::sun_java_launcher_is_altjvm()) {
1985 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical
1986 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".
1987 // If "/jre/lib/" appears at the right place in the string, then
1988 // assume we are installed in a JDK and we're done. Otherwise, check
1989 // for a JAVA_HOME environment variable and fix up the path so it
1990 // looks like libjvm.so is installed there (append a fake suffix
1991 // hotspot/libjvm.so).
1992 const char *p = buf + strlen(buf) - 1;
1993 for (int count = 0; p > buf && count < 5; ++count) {
1994 for (--p; p > buf && *p != '/'; --p)
1995 /* empty */ ;
1996 }
1997
1998 if (strncmp(p, "/jre/lib/", 9) != 0) {
1999 // Look for JAVA_HOME in the environment.
2000 char* java_home_var = ::getenv("JAVA_HOME");
2001 if (java_home_var != NULL && java_home_var[0] != 0) {
2002 char* jrelib_p;
2003 int len;
2004
2005 // Check the current module name "libjvm.so".
2006 p = strrchr(buf, '/');
2007 assert(strstr(p, "/libjvm") == p, "invalid library name");
2008
2009 if (os::Posix::realpath(java_home_var, buf, buflen) == NULL) {
2010 return;
2011 }
2012 // determine if this is a legacy image or modules image
2013 // modules image doesn't have "jre" subdirectory
2014 len = strlen(buf);
2015 assert(len < buflen, "Ran out of buffer space");
2016 jrelib_p = buf + len;
2017 snprintf(jrelib_p, buflen-len, "/jre/lib");
2018 if (0 != access(buf, F_OK)) {
2019 snprintf(jrelib_p, buflen-len, "/lib");
2020 }
2021
2022 if (0 == access(buf, F_OK)) {
2023 // Use current module name "libjvm.so"
2024 len = strlen(buf);
2025 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so");
2026 } else {
2027 // Go back to path of .so
2028 if (os::Posix::realpath((char *)dlinfo.dli_fname, buf, buflen) == NULL) {
2029 return;
2030 }
2031 }
2032 }
2033 }
2034 }
2035
2036 strncpy(saved_jvm_path, buf, MAXPATHLEN);
2037 saved_jvm_path[MAXPATHLEN - 1] = '\0';
2038 }
2039
2040
2041 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
2042 // no prefix required, not even "_"
2043 }
2044
2045
2046 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
2047 // no suffix required
2048 }
2049
2050 // sun.misc.Signal
2051
2052 extern "C" {
2053 static void UserHandler(int sig, void *siginfo, void *context) {
2054 // Ctrl-C is pressed during error reporting, likely because the error
2055 // handler fails to abort. Let VM die immediately.
2056 if (sig == SIGINT && VMError::is_error_reported()) {
2057 os::die();
2058 }
2059
2060 os::signal_notify(sig);
2061 // We do not need to reinstate the signal handler each time...
2062 }
2063 }
2064
2065 void* os::user_handler() {
2066 return CAST_FROM_FN_PTR(void*, UserHandler);
2067 }
2068
2069 extern "C" {
2070 typedef void (*sa_handler_t)(int);
2071 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
2072 }
2073
2074 void* os::signal(int signal_number, void* handler) {
2075 struct sigaction sigAct, oldSigAct;
2076 sigfillset(&(sigAct.sa_mask));
2077 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND;
2078 sigAct.sa_flags |= SA_SIGINFO;
2079 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
2080
2081 if (sigaction(signal_number, &sigAct, &oldSigAct)) {
2082 // -1 means registration failed
2083 return (void *)-1;
2084 }
2085
2086 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
2087 }
2088
2089 void os::signal_raise(int signal_number) {
2090 raise(signal_number);
2091 }
2092
2093 // The following code is moved from os.cpp for making this
2094 // code platform specific, which it is by its very nature.
2095
2096 // a counter for each possible signal value
2097 static int Sigexit = 0;
2098 static jint *pending_signals = NULL;
2099 static int *preinstalled_sigs = NULL;
2100 static struct sigaction *chainedsigactions = NULL;
2101 static Semaphore* sig_sem = NULL;
2102
2103 int os::sigexitnum_pd() {
2104 assert(Sigexit > 0, "signal memory not yet initialized");
2105 return Sigexit;
2106 }
2107
2108 void os::Solaris::init_signal_mem() {
2109 // Initialize signal structures
2110 Maxsignum = SIGRTMAX;
2111 Sigexit = Maxsignum+1;
2112 assert(Maxsignum >0, "Unable to obtain max signal number");
2113
2114 // Initialize signal structures
2115 // pending_signals has one int per signal
2116 // The additional signal is for SIGEXIT - exit signal to signal_thread
2117 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal);
2118 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1)));
2119
2120 if (UseSignalChaining) {
2121 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction)
2122 * (Maxsignum + 1), mtInternal);
2123 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1)));
2124 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2125 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1)));
2126 }
2127 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal);
2128 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1));
2129 }
2130
2131 static void jdk_misc_signal_init() {
2132 // Initialize signal semaphore
2133 sig_sem = new Semaphore();
2134 }
2135
2136 void os::signal_notify(int sig) {
2137 if (sig_sem != NULL) {
2138 Atomic::inc(&pending_signals[sig]);
2139 sig_sem->signal();
2140 } else {
2141 // Signal thread is not created with ReduceSignalUsage and jdk_misc_signal_init
2142 // initialization isn't called.
2143 assert(ReduceSignalUsage, "signal semaphore should be created");
2144 }
2145 }
2146
2147 static int check_pending_signals() {
2148 int ret;
2149 while (true) {
2150 for (int i = 0; i < Sigexit + 1; i++) {
2151 jint n = pending_signals[i];
2152 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
2153 return i;
2154 }
2155 }
2156 JavaThread *thread = JavaThread::current();
2157 ThreadBlockInVM tbivm(thread);
2158
2159 bool threadIsSuspended;
2160 do {
2161 thread->set_suspend_equivalent();
2162 sig_sem->wait();
2163
2164 // were we externally suspended while we were waiting?
2165 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2166 if (threadIsSuspended) {
2167 // The semaphore has been incremented, but while we were waiting
2168 // another thread suspended us. We don't want to continue running
2169 // while suspended because that would surprise the thread that
2170 // suspended us.
2171 sig_sem->signal();
2172
2173 thread->java_suspend_self();
2174 }
2175 } while (threadIsSuspended);
2176 }
2177 }
2178
2179 int os::signal_wait() {
2180 return check_pending_signals();
2181 }
2182
2183 ////////////////////////////////////////////////////////////////////////////////
2184 // Virtual Memory
2185
2186 static int page_size = -1;
2187
2188 int os::vm_page_size() {
2189 assert(page_size != -1, "must call os::init");
2190 return page_size;
2191 }
2192
2193 // Solaris allocates memory by pages.
2194 int os::vm_allocation_granularity() {
2195 assert(page_size != -1, "must call os::init");
2196 return page_size;
2197 }
2198
2199 static bool recoverable_mmap_error(int err) {
2200 // See if the error is one we can let the caller handle. This
2201 // list of errno values comes from the Solaris mmap(2) man page.
2202 switch (err) {
2203 case EBADF:
2204 case EINVAL:
2205 case ENOTSUP:
2206 // let the caller deal with these errors
2207 return true;
2208
2209 default:
2210 // Any remaining errors on this OS can cause our reserved mapping
2211 // to be lost. That can cause confusion where different data
2212 // structures think they have the same memory mapped. The worst
2213 // scenario is if both the VM and a library think they have the
2214 // same memory mapped.
2215 return false;
2216 }
2217 }
2218
2219 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec,
2220 int err) {
2221 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2222 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec,
2223 os::strerror(err), err);
2224 }
2225
2226 static void warn_fail_commit_memory(char* addr, size_t bytes,
2227 size_t alignment_hint, bool exec,
2228 int err) {
2229 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
2230 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes,
2231 alignment_hint, exec, os::strerror(err), err);
2232 }
2233
2234 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) {
2235 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
2236 size_t size = bytes;
2237 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot);
2238 if (res != NULL) {
2239 if (UseNUMAInterleaving) {
2240 numa_make_global(addr, bytes);
2241 }
2242 return 0;
2243 }
2244
2245 int err = errno; // save errno from mmap() call in mmap_chunk()
2246
2247 if (!recoverable_mmap_error(err)) {
2248 warn_fail_commit_memory(addr, bytes, exec, err);
2249 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory.");
2250 }
2251
2252 return err;
2253 }
2254
2255 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
2256 return Solaris::commit_memory_impl(addr, bytes, exec) == 0;
2257 }
2258
2259 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec,
2260 const char* mesg) {
2261 assert(mesg != NULL, "mesg must be specified");
2262 int err = os::Solaris::commit_memory_impl(addr, bytes, exec);
2263 if (err != 0) {
2264 // the caller wants all commit errors to exit with the specified mesg:
2265 warn_fail_commit_memory(addr, bytes, exec, err);
2266 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg);
2267 }
2268 }
2269
2270 size_t os::Solaris::page_size_for_alignment(size_t alignment) {
2271 assert(is_aligned(alignment, (size_t) vm_page_size()),
2272 SIZE_FORMAT " is not aligned to " SIZE_FORMAT,
2273 alignment, (size_t) vm_page_size());
2274
2275 for (int i = 0; _page_sizes[i] != 0; i++) {
2276 if (is_aligned(alignment, _page_sizes[i])) {
2277 return _page_sizes[i];
2278 }
2279 }
2280
2281 return (size_t) vm_page_size();
2282 }
2283
2284 int os::Solaris::commit_memory_impl(char* addr, size_t bytes,
2285 size_t alignment_hint, bool exec) {
2286 int err = Solaris::commit_memory_impl(addr, bytes, exec);
2287 if (err == 0 && UseLargePages && alignment_hint > 0) {
2288 assert(is_aligned(bytes, alignment_hint),
2289 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint);
2290
2291 // The syscall memcntl requires an exact page size (see man memcntl for details).
2292 size_t page_size = page_size_for_alignment(alignment_hint);
2293 if (page_size > (size_t) vm_page_size()) {
2294 (void)Solaris::setup_large_pages(addr, bytes, page_size);
2295 }
2296 }
2297 return err;
2298 }
2299
2300 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint,
2301 bool exec) {
2302 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0;
2303 }
2304
2305 void os::pd_commit_memory_or_exit(char* addr, size_t bytes,
2306 size_t alignment_hint, bool exec,
2307 const char* mesg) {
2308 assert(mesg != NULL, "mesg must be specified");
2309 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec);
2310 if (err != 0) {
2311 // the caller wants all commit errors to exit with the specified mesg:
2312 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err);
2313 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg);
2314 }
2315 }
2316
2317 // Uncommit the pages in a specified region.
2318 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) {
2319 if (madvise(addr, bytes, MADV_FREE) < 0) {
2320 debug_only(warning("MADV_FREE failed."));
2321 return;
2322 }
2323 }
2324
2325 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
2326 return os::commit_memory(addr, size, !ExecMem);
2327 }
2328
2329 bool os::remove_stack_guard_pages(char* addr, size_t size) {
2330 return os::uncommit_memory(addr, size);
2331 }
2332
2333 // Change the page size in a given range.
2334 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
2335 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned.");
2336 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned.");
2337 if (UseLargePages) {
2338 size_t page_size = Solaris::page_size_for_alignment(alignment_hint);
2339 if (page_size > (size_t) vm_page_size()) {
2340 Solaris::setup_large_pages(addr, bytes, page_size);
2341 }
2342 }
2343 }
2344
2345 // Tell the OS to make the range local to the first-touching LWP
2346 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
2347 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2348 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) {
2349 debug_only(warning("MADV_ACCESS_LWP failed."));
2350 }
2351 }
2352
2353 // Tell the OS that this range would be accessed from different LWPs.
2354 void os::numa_make_global(char *addr, size_t bytes) {
2355 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned.");
2356 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) {
2357 debug_only(warning("MADV_ACCESS_MANY failed."));
2358 }
2359 }
2360
2361 // Get the number of the locality groups.
2362 size_t os::numa_get_groups_num() {
2363 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie());
2364 return n != -1 ? n : 1;
2365 }
2366
2367 // Get a list of leaf locality groups. A leaf lgroup is group that
2368 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory
2369 // board. An LWP is assigned to one of these groups upon creation.
2370 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
2371 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) {
2372 ids[0] = 0;
2373 return 1;
2374 }
2375 int result_size = 0, top = 1, bottom = 0, cur = 0;
2376 for (int k = 0; k < size; k++) {
2377 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur],
2378 (Solaris::lgrp_id_t*)&ids[top], size - top);
2379 if (r == -1) {
2380 ids[0] = 0;
2381 return 1;
2382 }
2383 if (!r) {
2384 // That's a leaf node.
2385 assert(bottom <= cur, "Sanity check");
2386 // Check if the node has memory
2387 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur],
2388 NULL, 0, LGRP_RSRC_MEM) > 0) {
2389 ids[bottom++] = ids[cur];
2390 }
2391 }
2392 top += r;
2393 cur++;
2394 }
2395 if (bottom == 0) {
2396 // Handle a situation, when the OS reports no memory available.
2397 // Assume UMA architecture.
2398 ids[0] = 0;
2399 return 1;
2400 }
2401 return bottom;
2402 }
2403
2404 // Detect the topology change. Typically happens during CPU plugging-unplugging.
2405 bool os::numa_topology_changed() {
2406 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie());
2407 if (is_stale != -1 && is_stale) {
2408 Solaris::lgrp_fini(Solaris::lgrp_cookie());
2409 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER);
2410 assert(c != 0, "Failure to initialize LGRP API");
2411 Solaris::set_lgrp_cookie(c);
2412 return true;
2413 }
2414 return false;
2415 }
2416
2417 // Get the group id of the current LWP.
2418 int os::numa_get_group_id() {
2419 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID);
2420 if (lgrp_id == -1) {
2421 return 0;
2422 }
2423 const int size = os::numa_get_groups_num();
2424 int *ids = (int*)alloca(size * sizeof(int));
2425
2426 // Get the ids of all lgroups with memory; r is the count.
2427 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id,
2428 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM);
2429 if (r <= 0) {
2430 return 0;
2431 }
2432 return ids[os::random() % r];
2433 }
2434
2435 // Request information about the page.
2436 bool os::get_page_info(char *start, page_info* info) {
2437 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2438 uint64_t addr = (uintptr_t)start;
2439 uint64_t outdata[2];
2440 uint_t validity = 0;
2441
2442 if (meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) {
2443 return false;
2444 }
2445
2446 info->size = 0;
2447 info->lgrp_id = -1;
2448
2449 if ((validity & 1) != 0) {
2450 if ((validity & 2) != 0) {
2451 info->lgrp_id = outdata[0];
2452 }
2453 if ((validity & 4) != 0) {
2454 info->size = outdata[1];
2455 }
2456 return true;
2457 }
2458 return false;
2459 }
2460
2461 // Scan the pages from start to end until a page different than
2462 // the one described in the info parameter is encountered.
2463 char *os::scan_pages(char *start, char* end, page_info* page_expected,
2464 page_info* page_found) {
2465 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE };
2466 const size_t types = sizeof(info_types) / sizeof(info_types[0]);
2467 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1];
2468 uint_t validity[MAX_MEMINFO_CNT];
2469
2470 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size);
2471 uint64_t p = (uint64_t)start;
2472 while (p < (uint64_t)end) {
2473 addrs[0] = p;
2474 size_t addrs_count = 1;
2475 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) {
2476 addrs[addrs_count] = addrs[addrs_count - 1] + page_size;
2477 addrs_count++;
2478 }
2479
2480 if (meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) {
2481 return NULL;
2482 }
2483
2484 size_t i = 0;
2485 for (; i < addrs_count; i++) {
2486 if ((validity[i] & 1) != 0) {
2487 if ((validity[i] & 4) != 0) {
2488 if (outdata[types * i + 1] != page_expected->size) {
2489 break;
2490 }
2491 } else if (page_expected->size != 0) {
2492 break;
2493 }
2494
2495 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) {
2496 if (outdata[types * i] != page_expected->lgrp_id) {
2497 break;
2498 }
2499 }
2500 } else {
2501 return NULL;
2502 }
2503 }
2504
2505 if (i < addrs_count) {
2506 if ((validity[i] & 2) != 0) {
2507 page_found->lgrp_id = outdata[types * i];
2508 } else {
2509 page_found->lgrp_id = -1;
2510 }
2511 if ((validity[i] & 4) != 0) {
2512 page_found->size = outdata[types * i + 1];
2513 } else {
2514 page_found->size = 0;
2515 }
2516 return (char*)addrs[i];
2517 }
2518
2519 p = addrs[addrs_count - 1] + page_size;
2520 }
2521 return end;
2522 }
2523
2524 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
2525 size_t size = bytes;
2526 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2527 // uncommitted page. Otherwise, the read/write might succeed if we
2528 // have enough swap space to back the physical page.
2529 return
2530 NULL != Solaris::mmap_chunk(addr, size,
2531 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE,
2532 PROT_NONE);
2533 }
2534
2535 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) {
2536 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0);
2537
2538 if (b == MAP_FAILED) {
2539 return NULL;
2540 }
2541 return b;
2542 }
2543
2544 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes,
2545 size_t alignment_hint, bool fixed) {
2546 char* addr = requested_addr;
2547 int flags = MAP_PRIVATE | MAP_NORESERVE;
2548
2549 assert(!(fixed && (alignment_hint > 0)),
2550 "alignment hint meaningless with fixed mmap");
2551
2552 if (fixed) {
2553 flags |= MAP_FIXED;
2554 } else if (alignment_hint > (size_t) vm_page_size()) {
2555 flags |= MAP_ALIGN;
2556 addr = (char*) alignment_hint;
2557 }
2558
2559 // Map uncommitted pages PROT_NONE so we fail early if we touch an
2560 // uncommitted page. Otherwise, the read/write might succeed if we
2561 // have enough swap space to back the physical page.
2562 return mmap_chunk(addr, bytes, flags, PROT_NONE);
2563 }
2564
2565 char* os::pd_reserve_memory(size_t bytes, char* requested_addr,
2566 size_t alignment_hint) {
2567 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint,
2568 (requested_addr != NULL));
2569
2570 guarantee(requested_addr == NULL || requested_addr == addr,
2571 "OS failed to return requested mmap address.");
2572 return addr;
2573 }
2574
2575 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr, int file_desc) {
2576 assert(file_desc >= 0, "file_desc is not valid");
2577 char* result = pd_attempt_reserve_memory_at(bytes, requested_addr);
2578 if (result != NULL) {
2579 if (replace_existing_mapping_with_file_mapping(result, bytes, file_desc) == NULL) {
2580 vm_exit_during_initialization(err_msg("Error in mapping Java heap at the given filesystem directory"));
2581 }
2582 }
2583 return result;
2584 }
2585
2586 // Reserve memory at an arbitrary address, only if that area is
2587 // available (and not reserved for something else).
2588
2589 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
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 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
2599
2600 volatile int err = errno;
2601 if (addr == requested_addr) {
2602 return addr;
2603 }
2604
2605 if (addr != NULL) {
2606 pd_unmap_memory(addr, bytes);
2607 }
2608
2609 return NULL;
2610 }
2611
2612 bool os::pd_release_memory(char* addr, size_t bytes) {
2613 size_t size = bytes;
2614 return munmap(addr, size) == 0;
2615 }
2616
2617 static bool solaris_mprotect(char* addr, size_t bytes, int prot) {
2618 assert(addr == (char*)align_down((uintptr_t)addr, os::vm_page_size()),
2619 "addr must be page aligned");
2620 Events::log(NULL, "Protecting memory [" INTPTR_FORMAT "," INTPTR_FORMAT "] with protection modes %x", p2i(addr), p2i(addr+bytes), prot);
2621 int retVal = mprotect(addr, bytes, prot);
2622 return retVal == 0;
2623 }
2624
2625 // Protect memory (Used to pass readonly pages through
2626 // JNI GetArray<type>Elements with empty arrays.)
2627 // Also, used for serialization page and for compressed oops null pointer
2628 // checking.
2629 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
2630 bool is_committed) {
2631 unsigned int p = 0;
2632 switch (prot) {
2633 case MEM_PROT_NONE: p = PROT_NONE; break;
2634 case MEM_PROT_READ: p = PROT_READ; break;
2635 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break;
2636 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
2637 default:
2638 ShouldNotReachHere();
2639 }
2640 // is_committed is unused.
2641 return solaris_mprotect(addr, bytes, p);
2642 }
2643
2644 // guard_memory and unguard_memory only happens within stack guard pages.
2645 // Since ISM pertains only to the heap, guard and unguard memory should not
2646 /// happen with an ISM region.
2647 bool os::guard_memory(char* addr, size_t bytes) {
2648 return solaris_mprotect(addr, bytes, PROT_NONE);
2649 }
2650
2651 bool os::unguard_memory(char* addr, size_t bytes) {
2652 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE);
2653 }
2654
2655 // Large page support
2656 static size_t _large_page_size = 0;
2657
2658 // Insertion sort for small arrays (descending order).
2659 static void insertion_sort_descending(size_t* array, int len) {
2660 for (int i = 0; i < len; i++) {
2661 size_t val = array[i];
2662 for (size_t key = i; key > 0 && array[key - 1] < val; --key) {
2663 size_t tmp = array[key];
2664 array[key] = array[key - 1];
2665 array[key - 1] = tmp;
2666 }
2667 }
2668 }
2669
2670 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) {
2671 const unsigned int usable_count = VM_Version::page_size_count();
2672 if (usable_count == 1) {
2673 return false;
2674 }
2675
2676 // Find the right getpagesizes interface. When solaris 11 is the minimum
2677 // build platform, getpagesizes() (without the '2') can be called directly.
2678 typedef int (*gps_t)(size_t[], int);
2679 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2"));
2680 if (gps_func == NULL) {
2681 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes"));
2682 if (gps_func == NULL) {
2683 if (warn) {
2684 warning("MPSS is not supported by the operating system.");
2685 }
2686 return false;
2687 }
2688 }
2689
2690 // Fill the array of page sizes.
2691 int n = (*gps_func)(_page_sizes, page_sizes_max);
2692 assert(n > 0, "Solaris bug?");
2693
2694 if (n == page_sizes_max) {
2695 // Add a sentinel value (necessary only if the array was completely filled
2696 // since it is static (zeroed at initialization)).
2697 _page_sizes[--n] = 0;
2698 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");)
2699 }
2700 assert(_page_sizes[n] == 0, "missing sentinel");
2701 trace_page_sizes("available page sizes", _page_sizes, n);
2702
2703 if (n == 1) return false; // Only one page size available.
2704
2705 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and
2706 // select up to usable_count elements. First sort the array, find the first
2707 // acceptable value, then copy the usable sizes to the top of the array and
2708 // trim the rest. Make sure to include the default page size :-).
2709 //
2710 // A better policy could get rid of the 4M limit by taking the sizes of the
2711 // important VM memory regions (java heap and possibly the code cache) into
2712 // account.
2713 insertion_sort_descending(_page_sizes, n);
2714 const size_t size_limit =
2715 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes;
2716 int beg;
2717 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */;
2718 const int end = MIN2((int)usable_count, n) - 1;
2719 for (int cur = 0; cur < end; ++cur, ++beg) {
2720 _page_sizes[cur] = _page_sizes[beg];
2721 }
2722 _page_sizes[end] = vm_page_size();
2723 _page_sizes[end + 1] = 0;
2724
2725 if (_page_sizes[end] > _page_sizes[end - 1]) {
2726 // Default page size is not the smallest; sort again.
2727 insertion_sort_descending(_page_sizes, end + 1);
2728 }
2729 *page_size = _page_sizes[0];
2730
2731 trace_page_sizes("usable page sizes", _page_sizes, end + 1);
2732 return true;
2733 }
2734
2735 void os::large_page_init() {
2736 if (UseLargePages) {
2737 // print a warning if any large page related flag is specified on command line
2738 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
2739 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
2740
2741 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size);
2742 }
2743 }
2744
2745 bool os::Solaris::is_valid_page_size(size_t bytes) {
2746 for (int i = 0; _page_sizes[i] != 0; i++) {
2747 if (_page_sizes[i] == bytes) {
2748 return true;
2749 }
2750 }
2751 return false;
2752 }
2753
2754 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) {
2755 assert(is_valid_page_size(align), SIZE_FORMAT " is not a valid page size", align);
2756 assert(is_aligned((void*) start, align),
2757 PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align);
2758 assert(is_aligned(bytes, align),
2759 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align);
2760
2761 // Signal to OS that we want large pages for addresses
2762 // from addr, addr + bytes
2763 struct memcntl_mha mpss_struct;
2764 mpss_struct.mha_cmd = MHA_MAPSIZE_VA;
2765 mpss_struct.mha_pagesize = align;
2766 mpss_struct.mha_flags = 0;
2767 // Upon successful completion, memcntl() returns 0
2768 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) {
2769 debug_only(warning("Attempt to use MPSS failed."));
2770 return false;
2771 }
2772 return true;
2773 }
2774
2775 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) {
2776 fatal("os::reserve_memory_special should not be called on Solaris.");
2777 return NULL;
2778 }
2779
2780 bool os::release_memory_special(char* base, size_t bytes) {
2781 fatal("os::release_memory_special should not be called on Solaris.");
2782 return false;
2783 }
2784
2785 size_t os::large_page_size() {
2786 return _large_page_size;
2787 }
2788
2789 // MPSS allows application to commit large page memory on demand; with ISM
2790 // the entire memory region must be allocated as shared memory.
2791 bool os::can_commit_large_page_memory() {
2792 return true;
2793 }
2794
2795 bool os::can_execute_large_page_memory() {
2796 return true;
2797 }
2798
2799 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
2800 void os::infinite_sleep() {
2801 while (true) { // sleep forever ...
2802 ::sleep(100); // ... 100 seconds at a time
2803 }
2804 }
2805
2806 // Used to convert frequent JVM_Yield() to nops
2807 bool os::dont_yield() {
2808 if (DontYieldALot) {
2809 static hrtime_t last_time = 0;
2810 hrtime_t diff = getTimeNanos() - last_time;
2811
2812 if (diff < DontYieldALotInterval * 1000000) {
2813 return true;
2814 }
2815
2816 last_time += diff;
2817
2818 return false;
2819 } else {
2820 return false;
2821 }
2822 }
2823
2824 // Note that yield semantics are defined by the scheduling class to which
2825 // the thread currently belongs. Typically, yield will _not yield to
2826 // other equal or higher priority threads that reside on the dispatch queues
2827 // of other CPUs.
2828
2829 void os::naked_yield() {
2830 thr_yield();
2831 }
2832
2833 // Interface for setting lwp priorities. We are using T2 libthread,
2834 // which forces the use of bound threads, so all of our threads will
2835 // be assigned to real lwp's. Using the thr_setprio function is
2836 // meaningless in this mode so we must adjust the real lwp's priority.
2837 // The routines below implement the getting and setting of lwp priorities.
2838 //
2839 // Note: There are three priority scales used on Solaris. Java priotities
2840 // which range from 1 to 10, libthread "thr_setprio" scale which range
2841 // from 0 to 127, and the current scheduling class of the process we
2842 // are running in. This is typically from -60 to +60.
2843 // The setting of the lwp priorities in done after a call to thr_setprio
2844 // so Java priorities are mapped to libthread priorities and we map from
2845 // the latter to lwp priorities. We don't keep priorities stored in
2846 // Java priorities since some of our worker threads want to set priorities
2847 // higher than all Java threads.
2848 //
2849 // For related information:
2850 // (1) man -s 2 priocntl
2851 // (2) man -s 4 priocntl
2852 // (3) man dispadmin
2853 // = librt.so
2854 // = libthread/common/rtsched.c - thrp_setlwpprio().
2855 // = ps -cL <pid> ... to validate priority.
2856 // = sched_get_priority_min and _max
2857 // pthread_create
2858 // sched_setparam
2859 // pthread_setschedparam
2860 //
2861 // Assumptions:
2862 // + We assume that all threads in the process belong to the same
2863 // scheduling class. IE. an homogenous process.
2864 // + Must be root or in IA group to change change "interactive" attribute.
2865 // Priocntl() will fail silently. The only indication of failure is when
2866 // we read-back the value and notice that it hasn't changed.
2867 // + Interactive threads enter the runq at the head, non-interactive at the tail.
2868 // + For RT, change timeslice as well. Invariant:
2869 // constant "priority integral"
2870 // Konst == TimeSlice * (60-Priority)
2871 // Given a priority, compute appropriate timeslice.
2872 // + Higher numerical values have higher priority.
2873
2874 // sched class attributes
2875 typedef struct {
2876 int schedPolicy; // classID
2877 int maxPrio;
2878 int minPrio;
2879 } SchedInfo;
2880
2881
2882 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits;
2883
2884 #ifdef ASSERT
2885 static int ReadBackValidate = 1;
2886 #endif
2887 static int myClass = 0;
2888 static int myMin = 0;
2889 static int myMax = 0;
2890 static int myCur = 0;
2891 static bool priocntl_enable = false;
2892
2893 static const int criticalPrio = FXCriticalPriority;
2894 static int java_MaxPriority_to_os_priority = 0; // Saved mapping
2895
2896
2897 // lwp_priocntl_init
2898 //
2899 // Try to determine the priority scale for our process.
2900 //
2901 // Return errno or 0 if OK.
2902 //
2903 static int lwp_priocntl_init() {
2904 int rslt;
2905 pcinfo_t ClassInfo;
2906 pcparms_t ParmInfo;
2907 int i;
2908
2909 if (!UseThreadPriorities) return 0;
2910
2911 // If ThreadPriorityPolicy is 1, switch tables
2912 if (ThreadPriorityPolicy == 1) {
2913 for (i = 0; i < CriticalPriority+1; i++)
2914 os::java_to_os_priority[i] = prio_policy1[i];
2915 }
2916 if (UseCriticalJavaThreadPriority) {
2917 // MaxPriority always maps to the FX scheduling class and criticalPrio.
2918 // See set_native_priority() and set_lwp_class_and_priority().
2919 // Save original MaxPriority mapping in case attempt to
2920 // use critical priority fails.
2921 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority];
2922 // Set negative to distinguish from other priorities
2923 os::java_to_os_priority[MaxPriority] = -criticalPrio;
2924 }
2925
2926 // Get IDs for a set of well-known scheduling classes.
2927 // TODO-FIXME: GETCLINFO returns the current # of classes in the
2928 // the system. We should have a loop that iterates over the
2929 // classID values, which are known to be "small" integers.
2930
2931 strcpy(ClassInfo.pc_clname, "TS");
2932 ClassInfo.pc_cid = -1;
2933 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
2934 if (rslt < 0) return errno;
2935 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1");
2936 tsLimits.schedPolicy = ClassInfo.pc_cid;
2937 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri;
2938 tsLimits.minPrio = -tsLimits.maxPrio;
2939
2940 strcpy(ClassInfo.pc_clname, "IA");
2941 ClassInfo.pc_cid = -1;
2942 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
2943 if (rslt < 0) return errno;
2944 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1");
2945 iaLimits.schedPolicy = ClassInfo.pc_cid;
2946 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri;
2947 iaLimits.minPrio = -iaLimits.maxPrio;
2948
2949 strcpy(ClassInfo.pc_clname, "RT");
2950 ClassInfo.pc_cid = -1;
2951 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
2952 if (rslt < 0) return errno;
2953 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1");
2954 rtLimits.schedPolicy = ClassInfo.pc_cid;
2955 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri;
2956 rtLimits.minPrio = 0;
2957
2958 strcpy(ClassInfo.pc_clname, "FX");
2959 ClassInfo.pc_cid = -1;
2960 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo);
2961 if (rslt < 0) return errno;
2962 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1");
2963 fxLimits.schedPolicy = ClassInfo.pc_cid;
2964 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri;
2965 fxLimits.minPrio = 0;
2966
2967 // Query our "current" scheduling class.
2968 // This will normally be IA, TS or, rarely, FX or RT.
2969 memset(&ParmInfo, 0, sizeof(ParmInfo));
2970 ParmInfo.pc_cid = PC_CLNULL;
2971 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
2972 if (rslt < 0) return errno;
2973 myClass = ParmInfo.pc_cid;
2974
2975 // We now know our scheduling classId, get specific information
2976 // about the class.
2977 ClassInfo.pc_cid = myClass;
2978 ClassInfo.pc_clname[0] = 0;
2979 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo);
2980 if (rslt < 0) return errno;
2981
2982 if (ThreadPriorityVerbose) {
2983 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname);
2984 }
2985
2986 memset(&ParmInfo, 0, sizeof(pcparms_t));
2987 ParmInfo.pc_cid = PC_CLNULL;
2988 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo);
2989 if (rslt < 0) return errno;
2990
2991 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
2992 myMin = rtLimits.minPrio;
2993 myMax = rtLimits.maxPrio;
2994 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
2995 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
2996 myMin = iaLimits.minPrio;
2997 myMax = iaLimits.maxPrio;
2998 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict
2999 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3000 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3001 myMin = tsLimits.minPrio;
3002 myMax = tsLimits.maxPrio;
3003 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict
3004 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3005 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3006 myMin = fxLimits.minPrio;
3007 myMax = fxLimits.maxPrio;
3008 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict
3009 } else {
3010 // No clue - punt
3011 if (ThreadPriorityVerbose) {
3012 tty->print_cr("Unknown scheduling class: %s ... \n",
3013 ClassInfo.pc_clname);
3014 }
3015 return EINVAL; // no clue, punt
3016 }
3017
3018 if (ThreadPriorityVerbose) {
3019 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax);
3020 }
3021
3022 priocntl_enable = true; // Enable changing priorities
3023 return 0;
3024 }
3025
3026 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms))
3027 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms))
3028 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms))
3029 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms))
3030
3031
3032 // scale_to_lwp_priority
3033 //
3034 // Convert from the libthread "thr_setprio" scale to our current
3035 // lwp scheduling class scale.
3036 //
3037 static int scale_to_lwp_priority(int rMin, int rMax, int x) {
3038 int v;
3039
3040 if (x == 127) return rMax; // avoid round-down
3041 v = (((x*(rMax-rMin)))/128)+rMin;
3042 return v;
3043 }
3044
3045
3046 // set_lwp_class_and_priority
3047 int set_lwp_class_and_priority(int ThreadID, int lwpid,
3048 int newPrio, int new_class, bool scale) {
3049 int rslt;
3050 int Actual, Expected, prv;
3051 pcparms_t ParmInfo; // for GET-SET
3052 #ifdef ASSERT
3053 pcparms_t ReadBack; // for readback
3054 #endif
3055
3056 // Set priority via PC_GETPARMS, update, PC_SETPARMS
3057 // Query current values.
3058 // TODO: accelerate this by eliminating the PC_GETPARMS call.
3059 // Cache "pcparms_t" in global ParmCache.
3060 // TODO: elide set-to-same-value
3061
3062 // If something went wrong on init, don't change priorities.
3063 if (!priocntl_enable) {
3064 if (ThreadPriorityVerbose) {
3065 tty->print_cr("Trying to set priority but init failed, ignoring");
3066 }
3067 return EINVAL;
3068 }
3069
3070 // If lwp hasn't started yet, just return
3071 // the _start routine will call us again.
3072 if (lwpid <= 0) {
3073 if (ThreadPriorityVerbose) {
3074 tty->print_cr("deferring the set_lwp_class_and_priority of thread "
3075 INTPTR_FORMAT " to %d, lwpid not set",
3076 ThreadID, newPrio);
3077 }
3078 return 0;
3079 }
3080
3081 if (ThreadPriorityVerbose) {
3082 tty->print_cr ("set_lwp_class_and_priority("
3083 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ",
3084 ThreadID, lwpid, newPrio);
3085 }
3086
3087 memset(&ParmInfo, 0, sizeof(pcparms_t));
3088 ParmInfo.pc_cid = PC_CLNULL;
3089 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo);
3090 if (rslt < 0) return errno;
3091
3092 int cur_class = ParmInfo.pc_cid;
3093 ParmInfo.pc_cid = (id_t)new_class;
3094
3095 if (new_class == rtLimits.schedPolicy) {
3096 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms;
3097 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio,
3098 rtLimits.maxPrio, newPrio)
3099 : newPrio;
3100 rtInfo->rt_tqsecs = RT_NOCHANGE;
3101 rtInfo->rt_tqnsecs = RT_NOCHANGE;
3102 if (ThreadPriorityVerbose) {
3103 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri);
3104 }
3105 } else if (new_class == iaLimits.schedPolicy) {
3106 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms;
3107 int maxClamped = MIN2(iaLimits.maxPrio,
3108 cur_class == new_class
3109 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio);
3110 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio,
3111 maxClamped, newPrio)
3112 : newPrio;
3113 iaInfo->ia_uprilim = cur_class == new_class
3114 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio;
3115 iaInfo->ia_mode = IA_NOCHANGE;
3116 if (ThreadPriorityVerbose) {
3117 tty->print_cr("IA: [%d...%d] %d->%d\n",
3118 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri);
3119 }
3120 } else if (new_class == tsLimits.schedPolicy) {
3121 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms;
3122 int maxClamped = MIN2(tsLimits.maxPrio,
3123 cur_class == new_class
3124 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio);
3125 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio,
3126 maxClamped, newPrio)
3127 : newPrio;
3128 tsInfo->ts_uprilim = cur_class == new_class
3129 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio;
3130 if (ThreadPriorityVerbose) {
3131 tty->print_cr("TS: [%d...%d] %d->%d\n",
3132 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri);
3133 }
3134 } else if (new_class == fxLimits.schedPolicy) {
3135 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms;
3136 int maxClamped = MIN2(fxLimits.maxPrio,
3137 cur_class == new_class
3138 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio);
3139 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio,
3140 maxClamped, newPrio)
3141 : newPrio;
3142 fxInfo->fx_uprilim = cur_class == new_class
3143 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio;
3144 fxInfo->fx_tqsecs = FX_NOCHANGE;
3145 fxInfo->fx_tqnsecs = FX_NOCHANGE;
3146 if (ThreadPriorityVerbose) {
3147 tty->print_cr("FX: [%d...%d] %d->%d\n",
3148 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri);
3149 }
3150 } else {
3151 if (ThreadPriorityVerbose) {
3152 tty->print_cr("Unknown new scheduling class %d\n", new_class);
3153 }
3154 return EINVAL; // no clue, punt
3155 }
3156
3157 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo);
3158 if (ThreadPriorityVerbose && rslt) {
3159 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno);
3160 }
3161 if (rslt < 0) return errno;
3162
3163 #ifdef ASSERT
3164 // Sanity check: read back what we just attempted to set.
3165 // In theory it could have changed in the interim ...
3166 //
3167 // The priocntl system call is tricky.
3168 // Sometimes it'll validate the priority value argument and
3169 // return EINVAL if unhappy. At other times it fails silently.
3170 // Readbacks are prudent.
3171
3172 if (!ReadBackValidate) return 0;
3173
3174 memset(&ReadBack, 0, sizeof(pcparms_t));
3175 ReadBack.pc_cid = PC_CLNULL;
3176 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack);
3177 assert(rslt >= 0, "priocntl failed");
3178 Actual = Expected = 0xBAD;
3179 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match");
3180 if (ParmInfo.pc_cid == rtLimits.schedPolicy) {
3181 Actual = RTPRI(ReadBack)->rt_pri;
3182 Expected = RTPRI(ParmInfo)->rt_pri;
3183 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) {
3184 Actual = IAPRI(ReadBack)->ia_upri;
3185 Expected = IAPRI(ParmInfo)->ia_upri;
3186 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) {
3187 Actual = TSPRI(ReadBack)->ts_upri;
3188 Expected = TSPRI(ParmInfo)->ts_upri;
3189 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) {
3190 Actual = FXPRI(ReadBack)->fx_upri;
3191 Expected = FXPRI(ParmInfo)->fx_upri;
3192 } else {
3193 if (ThreadPriorityVerbose) {
3194 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n",
3195 ParmInfo.pc_cid);
3196 }
3197 }
3198
3199 if (Actual != Expected) {
3200 if (ThreadPriorityVerbose) {
3201 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n",
3202 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected);
3203 }
3204 }
3205 #endif
3206
3207 return 0;
3208 }
3209
3210 // Solaris only gives access to 128 real priorities at a time,
3211 // so we expand Java's ten to fill this range. This would be better
3212 // if we dynamically adjusted relative priorities.
3213 //
3214 // The ThreadPriorityPolicy option allows us to select 2 different
3215 // priority scales.
3216 //
3217 // ThreadPriorityPolicy=0
3218 // Since the Solaris' default priority is MaximumPriority, we do not
3219 // set a priority lower than Max unless a priority lower than
3220 // NormPriority is requested.
3221 //
3222 // ThreadPriorityPolicy=1
3223 // This mode causes the priority table to get filled with
3224 // linear values. NormPriority get's mapped to 50% of the
3225 // Maximum priority an so on. This will cause VM threads
3226 // to get unfair treatment against other Solaris processes
3227 // which do not explicitly alter their thread priorities.
3228
3229 int os::java_to_os_priority[CriticalPriority + 1] = {
3230 -99999, // 0 Entry should never be used
3231
3232 0, // 1 MinPriority
3233 32, // 2
3234 64, // 3
3235
3236 96, // 4
3237 127, // 5 NormPriority
3238 127, // 6
3239
3240 127, // 7
3241 127, // 8
3242 127, // 9 NearMaxPriority
3243
3244 127, // 10 MaxPriority
3245
3246 -criticalPrio // 11 CriticalPriority
3247 };
3248
3249 OSReturn os::set_native_priority(Thread* thread, int newpri) {
3250 OSThread* osthread = thread->osthread();
3251
3252 // Save requested priority in case the thread hasn't been started
3253 osthread->set_native_priority(newpri);
3254
3255 // Check for critical priority request
3256 bool fxcritical = false;
3257 if (newpri == -criticalPrio) {
3258 fxcritical = true;
3259 newpri = criticalPrio;
3260 }
3261
3262 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping");
3263 if (!UseThreadPriorities) return OS_OK;
3264
3265 int status = 0;
3266
3267 if (!fxcritical) {
3268 // Use thr_setprio only if we have a priority that thr_setprio understands
3269 status = thr_setprio(thread->osthread()->thread_id(), newpri);
3270 }
3271
3272 int lwp_status =
3273 set_lwp_class_and_priority(osthread->thread_id(),
3274 osthread->lwp_id(),
3275 newpri,
3276 fxcritical ? fxLimits.schedPolicy : myClass,
3277 !fxcritical);
3278 if (lwp_status != 0 && fxcritical) {
3279 // Try again, this time without changing the scheduling class
3280 newpri = java_MaxPriority_to_os_priority;
3281 lwp_status = set_lwp_class_and_priority(osthread->thread_id(),
3282 osthread->lwp_id(),
3283 newpri, myClass, false);
3284 }
3285 status |= lwp_status;
3286 return (status == 0) ? OS_OK : OS_ERR;
3287 }
3288
3289
3290 OSReturn os::get_native_priority(const Thread* const thread,
3291 int *priority_ptr) {
3292 int p;
3293 if (!UseThreadPriorities) {
3294 *priority_ptr = NormalPriority;
3295 return OS_OK;
3296 }
3297 int status = thr_getprio(thread->osthread()->thread_id(), &p);
3298 if (status != 0) {
3299 return OS_ERR;
3300 }
3301 *priority_ptr = p;
3302 return OS_OK;
3303 }
3304
3305 ////////////////////////////////////////////////////////////////////////////////
3306 // suspend/resume support
3307
3308 // The low-level signal-based suspend/resume support is a remnant from the
3309 // old VM-suspension that used to be for java-suspension, safepoints etc,
3310 // within hotspot. Currently used by JFR's OSThreadSampler
3311 //
3312 // The remaining code is greatly simplified from the more general suspension
3313 // code that used to be used.
3314 //
3315 // The protocol is quite simple:
3316 // - suspend:
3317 // - sends a signal to the target thread
3318 // - polls the suspend state of the osthread using a yield loop
3319 // - target thread signal handler (SR_handler) sets suspend state
3320 // and blocks in sigsuspend until continued
3321 // - resume:
3322 // - sets target osthread state to continue
3323 // - sends signal to end the sigsuspend loop in the SR_handler
3324 //
3325 // Note that the SR_lock plays no role in this suspend/resume protocol,
3326 // but is checked for NULL in SR_handler as a thread termination indicator.
3327 // The SR_lock is, however, used by JavaThread::java_suspend()/java_resume() APIs.
3328 //
3329 // Note that resume_clear_context() and suspend_save_context() are needed
3330 // by SR_handler(), so that fetch_frame_from_ucontext() works,
3331 // which in part is used by:
3332 // - Forte Analyzer: AsyncGetCallTrace()
3333 // - StackBanging: get_frame_at_stack_banging_point()
3334 // - JFR: get_topframe()-->....-->get_valid_uc_in_signal_handler()
3335
3336 static void resume_clear_context(OSThread *osthread) {
3337 osthread->set_ucontext(NULL);
3338 }
3339
3340 static void suspend_save_context(OSThread *osthread, ucontext_t* context) {
3341 osthread->set_ucontext(context);
3342 }
3343
3344 static PosixSemaphore sr_semaphore;
3345
3346 void os::Solaris::SR_handler(Thread* thread, ucontext_t* context) {
3347 // Save and restore errno to avoid confusing native code with EINTR
3348 // after sigsuspend.
3349 int old_errno = errno;
3350
3351 OSThread* osthread = thread->osthread();
3352 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
3353
3354 os::SuspendResume::State current = osthread->sr.state();
3355 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
3356 suspend_save_context(osthread, context);
3357
3358 // attempt to switch the state, we assume we had a SUSPEND_REQUEST
3359 os::SuspendResume::State state = osthread->sr.suspended();
3360 if (state == os::SuspendResume::SR_SUSPENDED) {
3361 sigset_t suspend_set; // signals for sigsuspend()
3362
3363 // get current set of blocked signals and unblock resume signal
3364 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set);
3365 sigdelset(&suspend_set, ASYNC_SIGNAL);
3366
3367 sr_semaphore.signal();
3368 // wait here until we are resumed
3369 while (1) {
3370 sigsuspend(&suspend_set);
3371
3372 os::SuspendResume::State result = osthread->sr.running();
3373 if (result == os::SuspendResume::SR_RUNNING) {
3374 sr_semaphore.signal();
3375 break;
3376 }
3377 }
3378
3379 } else if (state == os::SuspendResume::SR_RUNNING) {
3380 // request was cancelled, continue
3381 } else {
3382 ShouldNotReachHere();
3383 }
3384
3385 resume_clear_context(osthread);
3386 } else if (current == os::SuspendResume::SR_RUNNING) {
3387 // request was cancelled, continue
3388 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
3389 // ignore
3390 } else {
3391 // ignore
3392 }
3393
3394 errno = old_errno;
3395 }
3396
3397 void os::print_statistics() {
3398 }
3399
3400 bool os::message_box(const char* title, const char* message) {
3401 int i;
3402 fdStream err(defaultStream::error_fd());
3403 for (i = 0; i < 78; i++) err.print_raw("=");
3404 err.cr();
3405 err.print_raw_cr(title);
3406 for (i = 0; i < 78; i++) err.print_raw("-");
3407 err.cr();
3408 err.print_raw_cr(message);
3409 for (i = 0; i < 78; i++) err.print_raw("=");
3410 err.cr();
3411
3412 char buf[16];
3413 // Prevent process from exiting upon "read error" without consuming all CPU
3414 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
3415
3416 return buf[0] == 'y' || buf[0] == 'Y';
3417 }
3418
3419 static int sr_notify(OSThread* osthread) {
3420 int status = thr_kill(osthread->thread_id(), ASYNC_SIGNAL);
3421 assert_status(status == 0, status, "thr_kill");
3422 return status;
3423 }
3424
3425 // "Randomly" selected value for how long we want to spin
3426 // before bailing out on suspending a thread, also how often
3427 // we send a signal to a thread we want to resume
3428 static const int RANDOMLY_LARGE_INTEGER = 1000000;
3429 static const int RANDOMLY_LARGE_INTEGER2 = 100;
3430
3431 static bool do_suspend(OSThread* osthread) {
3432 assert(osthread->sr.is_running(), "thread should be running");
3433 assert(!sr_semaphore.trywait(), "semaphore has invalid state");
3434
3435 // mark as suspended and send signal
3436 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
3437 // failed to switch, state wasn't running?
3438 ShouldNotReachHere();
3439 return false;
3440 }
3441
3442 if (sr_notify(osthread) != 0) {
3443 ShouldNotReachHere();
3444 }
3445
3446 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
3447 while (true) {
3448 if (sr_semaphore.timedwait(2000)) {
3449 break;
3450 } else {
3451 // timeout
3452 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
3453 if (cancelled == os::SuspendResume::SR_RUNNING) {
3454 return false;
3455 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
3456 // make sure that we consume the signal on the semaphore as well
3457 sr_semaphore.wait();
3458 break;
3459 } else {
3460 ShouldNotReachHere();
3461 return false;
3462 }
3463 }
3464 }
3465
3466 guarantee(osthread->sr.is_suspended(), "Must be suspended");
3467 return true;
3468 }
3469
3470 static void do_resume(OSThread* osthread) {
3471 assert(osthread->sr.is_suspended(), "thread should be suspended");
3472 assert(!sr_semaphore.trywait(), "invalid semaphore state");
3473
3474 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
3475 // failed to switch to WAKEUP_REQUEST
3476 ShouldNotReachHere();
3477 return;
3478 }
3479
3480 while (true) {
3481 if (sr_notify(osthread) == 0) {
3482 if (sr_semaphore.timedwait(2)) {
3483 if (osthread->sr.is_running()) {
3484 return;
3485 }
3486 }
3487 } else {
3488 ShouldNotReachHere();
3489 }
3490 }
3491
3492 guarantee(osthread->sr.is_running(), "Must be running!");
3493 }
3494
3495 void os::SuspendedThreadTask::internal_do_task() {
3496 if (do_suspend(_thread->osthread())) {
3497 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
3498 do_task(context);
3499 do_resume(_thread->osthread());
3500 }
3501 }
3502
3503 // This does not do anything on Solaris. This is basically a hook for being
3504 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32.
3505 void os::os_exception_wrapper(java_call_t f, JavaValue* value,
3506 const methodHandle& method, JavaCallArguments* args,
3507 Thread* thread) {
3508 f(value, method, args, thread);
3509 }
3510
3511 // This routine may be used by user applications as a "hook" to catch signals.
3512 // The user-defined signal handler must pass unrecognized signals to this
3513 // routine, and if it returns true (non-zero), then the signal handler must
3514 // return immediately. If the flag "abort_if_unrecognized" is true, then this
3515 // routine will never retun false (zero), but instead will execute a VM panic
3516 // routine kill the process.
3517 //
3518 // If this routine returns false, it is OK to call it again. This allows
3519 // the user-defined signal handler to perform checks either before or after
3520 // the VM performs its own checks. Naturally, the user code would be making
3521 // a serious error if it tried to handle an exception (such as a null check
3522 // or breakpoint) that the VM was generating for its own correct operation.
3523 //
3524 // This routine may recognize any of the following kinds of signals:
3525 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ,
3526 // ASYNC_SIGNAL.
3527 // It should be consulted by handlers for any of those signals.
3528 //
3529 // The caller of this routine must pass in the three arguments supplied
3530 // to the function referred to in the "sa_sigaction" (not the "sa_handler")
3531 // field of the structure passed to sigaction(). This routine assumes that
3532 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
3533 //
3534 // Note that the VM will print warnings if it detects conflicting signal
3535 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
3536 //
3537 extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo,
3538 siginfo_t* siginfo,
3539 void* ucontext,
3540 int abort_if_unrecognized);
3541
3542
3543 void signalHandler(int sig, siginfo_t* info, void* ucVoid) {
3544 int orig_errno = errno; // Preserve errno value over signal handler.
3545 JVM_handle_solaris_signal(sig, info, ucVoid, true);
3546 errno = orig_errno;
3547 }
3548
3549 // This boolean allows users to forward their own non-matching signals
3550 // to JVM_handle_solaris_signal, harmlessly.
3551 bool os::Solaris::signal_handlers_are_installed = false;
3552
3553 // For signal-chaining
3554 bool os::Solaris::libjsig_is_loaded = false;
3555 typedef struct sigaction *(*get_signal_t)(int);
3556 get_signal_t os::Solaris::get_signal_action = NULL;
3557
3558 struct sigaction* os::Solaris::get_chained_signal_action(int sig) {
3559 struct sigaction *actp = NULL;
3560
3561 if ((libjsig_is_loaded) && (sig <= Maxsignum)) {
3562 // Retrieve the old signal handler from libjsig
3563 actp = (*get_signal_action)(sig);
3564 }
3565 if (actp == NULL) {
3566 // Retrieve the preinstalled signal handler from jvm
3567 actp = get_preinstalled_handler(sig);
3568 }
3569
3570 return actp;
3571 }
3572
3573 static bool call_chained_handler(struct sigaction *actp, int sig,
3574 siginfo_t *siginfo, void *context) {
3575 // Call the old signal handler
3576 if (actp->sa_handler == SIG_DFL) {
3577 // It's more reasonable to let jvm treat it as an unexpected exception
3578 // instead of taking the default action.
3579 return false;
3580 } else if (actp->sa_handler != SIG_IGN) {
3581 if ((actp->sa_flags & SA_NODEFER) == 0) {
3582 // automaticlly block the signal
3583 sigaddset(&(actp->sa_mask), sig);
3584 }
3585
3586 sa_handler_t hand;
3587 sa_sigaction_t sa;
3588 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
3589 // retrieve the chained handler
3590 if (siginfo_flag_set) {
3591 sa = actp->sa_sigaction;
3592 } else {
3593 hand = actp->sa_handler;
3594 }
3595
3596 if ((actp->sa_flags & SA_RESETHAND) != 0) {
3597 actp->sa_handler = SIG_DFL;
3598 }
3599
3600 // try to honor the signal mask
3601 sigset_t oset;
3602 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset);
3603
3604 // call into the chained handler
3605 if (siginfo_flag_set) {
3606 (*sa)(sig, siginfo, context);
3607 } else {
3608 (*hand)(sig);
3609 }
3610
3611 // restore the signal mask
3612 pthread_sigmask(SIG_SETMASK, &oset, 0);
3613 }
3614 // Tell jvm's signal handler the signal is taken care of.
3615 return true;
3616 }
3617
3618 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) {
3619 bool chained = false;
3620 // signal-chaining
3621 if (UseSignalChaining) {
3622 struct sigaction *actp = get_chained_signal_action(sig);
3623 if (actp != NULL) {
3624 chained = call_chained_handler(actp, sig, siginfo, context);
3625 }
3626 }
3627 return chained;
3628 }
3629
3630 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) {
3631 assert((chainedsigactions != (struct sigaction *)NULL) &&
3632 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
3633 if (preinstalled_sigs[sig] != 0) {
3634 return &chainedsigactions[sig];
3635 }
3636 return NULL;
3637 }
3638
3639 void os::Solaris::save_preinstalled_handler(int sig,
3640 struct sigaction& oldAct) {
3641 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range");
3642 assert((chainedsigactions != (struct sigaction *)NULL) &&
3643 (preinstalled_sigs != (int *)NULL), "signals not yet initialized");
3644 chainedsigactions[sig] = oldAct;
3645 preinstalled_sigs[sig] = 1;
3646 }
3647
3648 void os::Solaris::set_signal_handler(int sig, bool set_installed,
3649 bool oktochain) {
3650 // Check for overwrite.
3651 struct sigaction oldAct;
3652 sigaction(sig, (struct sigaction*)NULL, &oldAct);
3653 void* oldhand =
3654 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
3655 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
3656 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
3657 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
3658 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) {
3659 if (AllowUserSignalHandlers || !set_installed) {
3660 // Do not overwrite; user takes responsibility to forward to us.
3661 return;
3662 } else if (UseSignalChaining) {
3663 if (oktochain) {
3664 // save the old handler in jvm
3665 save_preinstalled_handler(sig, oldAct);
3666 } else {
3667 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal.");
3668 }
3669 // libjsig also interposes the sigaction() call below and saves the
3670 // old sigaction on it own.
3671 } else {
3672 fatal("Encountered unexpected pre-existing sigaction handler "
3673 "%#lx for signal %d.", (long)oldhand, sig);
3674 }
3675 }
3676
3677 struct sigaction sigAct;
3678 sigfillset(&(sigAct.sa_mask));
3679 sigAct.sa_handler = SIG_DFL;
3680
3681 sigAct.sa_sigaction = signalHandler;
3682 // Handle SIGSEGV on alternate signal stack if
3683 // not using stack banging
3684 if (!UseStackBanging && sig == SIGSEGV) {
3685 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
3686 } else {
3687 sigAct.sa_flags = SA_SIGINFO | SA_RESTART;
3688 }
3689 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags);
3690
3691 sigaction(sig, &sigAct, &oldAct);
3692
3693 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
3694 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
3695 assert(oldhand2 == oldhand, "no concurrent signal handler installation");
3696 }
3697
3698
3699 #define DO_SIGNAL_CHECK(sig) \
3700 do { \
3701 if (!sigismember(&check_signal_done, sig)) { \
3702 os::Solaris::check_signal_handler(sig); \
3703 } \
3704 } while (0)
3705
3706 // This method is a periodic task to check for misbehaving JNI applications
3707 // under CheckJNI, we can add any periodic checks here
3708
3709 void os::run_periodic_checks() {
3710 // A big source of grief is hijacking virt. addr 0x0 on Solaris,
3711 // thereby preventing a NULL checks.
3712 if (!check_addr0_done) check_addr0_done = check_addr0(tty);
3713
3714 if (check_signals == false) return;
3715
3716 // SEGV and BUS if overridden could potentially prevent
3717 // generation of hs*.log in the event of a crash, debugging
3718 // such a case can be very challenging, so we absolutely
3719 // check for the following for a good measure:
3720 DO_SIGNAL_CHECK(SIGSEGV);
3721 DO_SIGNAL_CHECK(SIGILL);
3722 DO_SIGNAL_CHECK(SIGFPE);
3723 DO_SIGNAL_CHECK(SIGBUS);
3724 DO_SIGNAL_CHECK(SIGPIPE);
3725 DO_SIGNAL_CHECK(SIGXFSZ);
3726 DO_SIGNAL_CHECK(ASYNC_SIGNAL);
3727
3728 // ReduceSignalUsage allows the user to override these handlers
3729 // see comments at the very top and jvm_solaris.h
3730 if (!ReduceSignalUsage) {
3731 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
3732 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
3733 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
3734 DO_SIGNAL_CHECK(BREAK_SIGNAL);
3735 }
3736 }
3737
3738 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
3739
3740 static os_sigaction_t os_sigaction = NULL;
3741
3742 void os::Solaris::check_signal_handler(int sig) {
3743 char buf[O_BUFLEN];
3744 address jvmHandler = NULL;
3745
3746 struct sigaction act;
3747 if (os_sigaction == NULL) {
3748 // only trust the default sigaction, in case it has been interposed
3749 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
3750 if (os_sigaction == NULL) return;
3751 }
3752
3753 os_sigaction(sig, (struct sigaction*)NULL, &act);
3754
3755 address thisHandler = (act.sa_flags & SA_SIGINFO)
3756 ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
3757 : CAST_FROM_FN_PTR(address, act.sa_handler);
3758
3759
3760 switch (sig) {
3761 case SIGSEGV:
3762 case SIGBUS:
3763 case SIGFPE:
3764 case SIGPIPE:
3765 case SIGXFSZ:
3766 case SIGILL:
3767 case ASYNC_SIGNAL:
3768 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler);
3769 break;
3770
3771 case SHUTDOWN1_SIGNAL:
3772 case SHUTDOWN2_SIGNAL:
3773 case SHUTDOWN3_SIGNAL:
3774 case BREAK_SIGNAL:
3775 jvmHandler = (address)user_handler();
3776 break;
3777
3778 default:
3779 return;
3780 }
3781
3782 if (thisHandler != jvmHandler) {
3783 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
3784 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
3785 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
3786 // No need to check this sig any longer
3787 sigaddset(&check_signal_done, sig);
3788 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN
3789 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) {
3790 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell",
3791 exception_name(sig, buf, O_BUFLEN));
3792 }
3793 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) {
3794 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
3795 tty->print("expected:");
3796 os::Posix::print_sa_flags(tty, os::Solaris::get_our_sigflags(sig));
3797 tty->cr();
3798 tty->print(" found:");
3799 os::Posix::print_sa_flags(tty, act.sa_flags);
3800 tty->cr();
3801 // No need to check this sig any longer
3802 sigaddset(&check_signal_done, sig);
3803 }
3804
3805 // Print all the signal handler state
3806 if (sigismember(&check_signal_done, sig)) {
3807 print_signal_handlers(tty, buf, O_BUFLEN);
3808 }
3809
3810 }
3811
3812 void os::Solaris::install_signal_handlers() {
3813 signal_handlers_are_installed = true;
3814
3815 // signal-chaining
3816 typedef void (*signal_setting_t)();
3817 signal_setting_t begin_signal_setting = NULL;
3818 signal_setting_t end_signal_setting = NULL;
3819 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
3820 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
3821 if (begin_signal_setting != NULL) {
3822 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
3823 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
3824 get_signal_action = CAST_TO_FN_PTR(get_signal_t,
3825 dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
3826 libjsig_is_loaded = true;
3827 assert(UseSignalChaining, "should enable signal-chaining");
3828 }
3829 if (libjsig_is_loaded) {
3830 // Tell libjsig jvm is setting signal handlers
3831 (*begin_signal_setting)();
3832 }
3833
3834 set_signal_handler(SIGSEGV, true, true);
3835 set_signal_handler(SIGPIPE, true, true);
3836 set_signal_handler(SIGXFSZ, true, true);
3837 set_signal_handler(SIGBUS, true, true);
3838 set_signal_handler(SIGILL, true, true);
3839 set_signal_handler(SIGFPE, true, true);
3840 set_signal_handler(ASYNC_SIGNAL, true, true);
3841
3842 if (libjsig_is_loaded) {
3843 // Tell libjsig jvm finishes setting signal handlers
3844 (*end_signal_setting)();
3845 }
3846
3847 // We don't activate signal checker if libjsig is in place, we trust ourselves
3848 // and if UserSignalHandler is installed all bets are off.
3849 // Log that signal checking is off only if -verbose:jni is specified.
3850 if (CheckJNICalls) {
3851 if (libjsig_is_loaded) {
3852 if (PrintJNIResolving) {
3853 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
3854 }
3855 check_signals = false;
3856 }
3857 if (AllowUserSignalHandlers) {
3858 if (PrintJNIResolving) {
3859 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
3860 }
3861 check_signals = false;
3862 }
3863 }
3864 }
3865
3866
3867 void report_error(const char* file_name, int line_no, const char* title,
3868 const char* format, ...);
3869
3870 // (Static) wrappers for the liblgrp API
3871 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home;
3872 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init;
3873 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini;
3874 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root;
3875 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children;
3876 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources;
3877 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps;
3878 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale;
3879 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0;
3880
3881 static address resolve_symbol_lazy(const char* name) {
3882 address addr = (address) dlsym(RTLD_DEFAULT, name);
3883 if (addr == NULL) {
3884 // RTLD_DEFAULT was not defined on some early versions of 2.5.1
3885 addr = (address) dlsym(RTLD_NEXT, name);
3886 }
3887 return addr;
3888 }
3889
3890 static address resolve_symbol(const char* name) {
3891 address addr = resolve_symbol_lazy(name);
3892 if (addr == NULL) {
3893 fatal(dlerror());
3894 }
3895 return addr;
3896 }
3897
3898 void os::Solaris::libthread_init() {
3899 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators");
3900
3901 lwp_priocntl_init();
3902
3903 // RTLD_DEFAULT was not defined on some early versions of 5.5.1
3904 if (func == NULL) {
3905 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators");
3906 // Guarantee that this VM is running on an new enough OS (5.6 or
3907 // later) that it will have a new enough libthread.so.
3908 guarantee(func != NULL, "libthread.so is too old.");
3909 }
3910
3911 int size;
3912 void (*handler_info_func)(address *, int *);
3913 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo"));
3914 handler_info_func(&handler_start, &size);
3915 handler_end = handler_start + size;
3916 }
3917
3918
3919 int_fnP_mutex_tP os::Solaris::_mutex_lock;
3920 int_fnP_mutex_tP os::Solaris::_mutex_trylock;
3921 int_fnP_mutex_tP os::Solaris::_mutex_unlock;
3922 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init;
3923 int_fnP_mutex_tP os::Solaris::_mutex_destroy;
3924 int os::Solaris::_mutex_scope = USYNC_THREAD;
3925
3926 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait;
3927 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait;
3928 int_fnP_cond_tP os::Solaris::_cond_signal;
3929 int_fnP_cond_tP os::Solaris::_cond_broadcast;
3930 int_fnP_cond_tP_i_vP os::Solaris::_cond_init;
3931 int_fnP_cond_tP os::Solaris::_cond_destroy;
3932 int os::Solaris::_cond_scope = USYNC_THREAD;
3933 bool os::Solaris::_synchronization_initialized;
3934
3935 void os::Solaris::synchronization_init() {
3936 if (UseLWPSynchronization) {
3937 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock")));
3938 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock")));
3939 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock")));
3940 os::Solaris::set_mutex_init(lwp_mutex_init);
3941 os::Solaris::set_mutex_destroy(lwp_mutex_destroy);
3942 os::Solaris::set_mutex_scope(USYNC_THREAD);
3943
3944 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait")));
3945 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait")));
3946 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal")));
3947 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast")));
3948 os::Solaris::set_cond_init(lwp_cond_init);
3949 os::Solaris::set_cond_destroy(lwp_cond_destroy);
3950 os::Solaris::set_cond_scope(USYNC_THREAD);
3951 } else {
3952 os::Solaris::set_mutex_scope(USYNC_THREAD);
3953 os::Solaris::set_cond_scope(USYNC_THREAD);
3954
3955 if (UsePthreads) {
3956 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock")));
3957 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock")));
3958 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock")));
3959 os::Solaris::set_mutex_init(pthread_mutex_default_init);
3960 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy")));
3961
3962 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait")));
3963 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait")));
3964 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal")));
3965 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast")));
3966 os::Solaris::set_cond_init(pthread_cond_default_init);
3967 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy")));
3968 } else {
3969 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock")));
3970 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock")));
3971 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock")));
3972 os::Solaris::set_mutex_init(::mutex_init);
3973 os::Solaris::set_mutex_destroy(::mutex_destroy);
3974
3975 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait")));
3976 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait")));
3977 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal")));
3978 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast")));
3979 os::Solaris::set_cond_init(::cond_init);
3980 os::Solaris::set_cond_destroy(::cond_destroy);
3981 }
3982 }
3983 _synchronization_initialized = true;
3984 }
3985
3986 bool os::Solaris::liblgrp_init() {
3987 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY);
3988 if (handle != NULL) {
3989 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home")));
3990 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init")));
3991 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini")));
3992 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root")));
3993 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children")));
3994 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources")));
3995 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps")));
3996 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t,
3997 dlsym(handle, "lgrp_cookie_stale")));
3998
3999 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER);
4000 set_lgrp_cookie(c);
4001 return true;
4002 }
4003 return false;
4004 }
4005
4006 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
4007 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem);
4008 static pset_getloadavg_type pset_getloadavg_ptr = NULL;
4009
4010 void init_pset_getloadavg_ptr(void) {
4011 pset_getloadavg_ptr =
4012 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg");
4013 if (pset_getloadavg_ptr == NULL) {
4014 log_warning(os)("pset_getloadavg function not found");
4015 }
4016 }
4017
4018 int os::Solaris::_dev_zero_fd = -1;
4019
4020 // this is called _before_ the global arguments have been parsed
4021 void os::init(void) {
4022 _initial_pid = getpid();
4023
4024 max_hrtime = first_hrtime = gethrtime();
4025
4026 init_random(1234567);
4027
4028 page_size = sysconf(_SC_PAGESIZE);
4029 if (page_size == -1) {
4030 fatal("os_solaris.cpp: os::init: sysconf failed (%s)", os::strerror(errno));
4031 }
4032 init_page_sizes((size_t) page_size);
4033
4034 Solaris::initialize_system_info();
4035
4036 int fd = ::open("/dev/zero", O_RDWR);
4037 if (fd < 0) {
4038 fatal("os::init: cannot open /dev/zero (%s)", os::strerror(errno));
4039 } else {
4040 Solaris::set_dev_zero_fd(fd);
4041
4042 // Close on exec, child won't inherit.
4043 fcntl(fd, F_SETFD, FD_CLOEXEC);
4044 }
4045
4046 clock_tics_per_sec = CLK_TCK;
4047
4048 // check if dladdr1() exists; dladdr1 can provide more information than
4049 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9
4050 // and is available on linker patches for 5.7 and 5.8.
4051 // libdl.so must have been loaded, this call is just an entry lookup
4052 void * hdl = dlopen("libdl.so", RTLD_NOW);
4053 if (hdl) {
4054 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1"));
4055 }
4056
4057 // main_thread points to the thread that created/loaded the JVM.
4058 main_thread = thr_self();
4059
4060 // dynamic lookup of functions that may not be available in our lowest
4061 // supported Solaris release
4062 void * handle = dlopen("libc.so.1", RTLD_LAZY);
4063 if (handle != NULL) {
4064 Solaris::_pthread_setname_np = // from 11.3
4065 (Solaris::pthread_setname_np_func_t)dlsym(handle, "pthread_setname_np");
4066 }
4067
4068 // Shared Posix initialization
4069 os::Posix::init();
4070 }
4071
4072 // To install functions for atexit system call
4073 extern "C" {
4074 static void perfMemory_exit_helper() {
4075 perfMemory_exit();
4076 }
4077 }
4078
4079 // this is called _after_ the global arguments have been parsed
4080 jint os::init_2(void) {
4081 // try to enable extended file IO ASAP, see 6431278
4082 os::Solaris::try_enable_extended_io();
4083
4084 // Check and sets minimum stack sizes against command line options
4085 if (Posix::set_minimum_stack_sizes() == JNI_ERR) {
4086 return JNI_ERR;
4087 }
4088
4089 Solaris::libthread_init();
4090
4091 if (UseNUMA) {
4092 if (!Solaris::liblgrp_init()) {
4093 UseNUMA = false;
4094 } else {
4095 size_t lgrp_limit = os::numa_get_groups_num();
4096 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal);
4097 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit);
4098 FREE_C_HEAP_ARRAY(int, lgrp_ids);
4099 if (lgrp_num < 2) {
4100 // There's only one locality group, disable NUMA.
4101 UseNUMA = false;
4102 }
4103 }
4104 if (!UseNUMA && ForceNUMA) {
4105 UseNUMA = true;
4106 }
4107 }
4108
4109 Solaris::signal_sets_init();
4110 Solaris::init_signal_mem();
4111 Solaris::install_signal_handlers();
4112 // Initialize data for jdk.internal.misc.Signal
4113 if (!ReduceSignalUsage) {
4114 jdk_misc_signal_init();
4115 }
4116
4117 // initialize synchronization primitives to use either thread or
4118 // lwp synchronization (controlled by UseLWPSynchronization)
4119 Solaris::synchronization_init();
4120 DEBUG_ONLY(os::set_mutex_init_done();)
4121
4122 if (MaxFDLimit) {
4123 // set the number of file descriptors to max. print out error
4124 // if getrlimit/setrlimit fails but continue regardless.
4125 struct rlimit nbr_files;
4126 int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
4127 if (status != 0) {
4128 log_info(os)("os::init_2 getrlimit failed: %s", os::strerror(errno));
4129 } else {
4130 nbr_files.rlim_cur = nbr_files.rlim_max;
4131 status = setrlimit(RLIMIT_NOFILE, &nbr_files);
4132 if (status != 0) {
4133 log_info(os)("os::init_2 setrlimit failed: %s", os::strerror(errno));
4134 }
4135 }
4136 }
4137
4138 // Calculate theoretical max. size of Threads to guard gainst
4139 // artifical out-of-memory situations, where all available address-
4140 // space has been reserved by thread stacks. Default stack size is 1Mb.
4141 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ?
4142 JavaThread::stack_size_at_create() : (1*K*K);
4143 assert(pre_thread_stack_size != 0, "Must have a stack");
4144 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when
4145 // we should start doing Virtual Memory banging. Currently when the threads will
4146 // have used all but 200Mb of space.
4147 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K);
4148 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size;
4149
4150 // at-exit methods are called in the reverse order of their registration.
4151 // In Solaris 7 and earlier, atexit functions are called on return from
4152 // main or as a result of a call to exit(3C). There can be only 32 of
4153 // these functions registered and atexit() does not set errno. In Solaris
4154 // 8 and later, there is no limit to the number of functions registered
4155 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit
4156 // functions are called upon dlclose(3DL) in addition to return from main
4157 // and exit(3C).
4158
4159 if (PerfAllowAtExitRegistration) {
4160 // only register atexit functions if PerfAllowAtExitRegistration is set.
4161 // atexit functions can be delayed until process exit time, which
4162 // can be problematic for embedded VM situations. Embedded VMs should
4163 // call DestroyJavaVM() to assure that VM resources are released.
4164
4165 // note: perfMemory_exit_helper atexit function may be removed in
4166 // the future if the appropriate cleanup code can be added to the
4167 // VM_Exit VMOperation's doit method.
4168 if (atexit(perfMemory_exit_helper) != 0) {
4169 warning("os::init2 atexit(perfMemory_exit_helper) failed");
4170 }
4171 }
4172
4173 // Init pset_loadavg function pointer
4174 init_pset_getloadavg_ptr();
4175
4176 // Shared Posix initialization
4177 os::Posix::init_2();
4178
4179 return JNI_OK;
4180 }
4181
4182 // Mark the polling page as unreadable
4183 void os::make_polling_page_unreadable(void) {
4184 Events::log(NULL, "Protecting polling page " INTPTR_FORMAT " with PROT_NONE", p2i(_polling_page));
4185 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) {
4186 fatal("Could not disable polling page");
4187 }
4188 }
4189
4190 // Mark the polling page as readable
4191 void os::make_polling_page_readable(void) {
4192 Events::log(NULL, "Protecting polling page " INTPTR_FORMAT " with PROT_READ", p2i(_polling_page));
4193 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) {
4194 fatal("Could not enable polling page");
4195 }
4196 }
4197
4198 // Is a (classpath) directory empty?
4199 bool os::dir_is_empty(const char* path) {
4200 DIR *dir = NULL;
4201 struct dirent *ptr;
4202
4203 dir = opendir(path);
4204 if (dir == NULL) return true;
4205
4206 // Scan the directory
4207 bool result = true;
4208 while (result && (ptr = readdir(dir)) != NULL) {
4209 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
4210 result = false;
4211 }
4212 }
4213 closedir(dir);
4214 return result;
4215 }
4216
4217 // This code originates from JDK's sysOpen and open64_w
4218 // from src/solaris/hpi/src/system_md.c
4219
4220 int os::open(const char *path, int oflag, int mode) {
4221 if (strlen(path) > MAX_PATH - 1) {
4222 errno = ENAMETOOLONG;
4223 return -1;
4224 }
4225 int fd;
4226
4227 fd = ::open64(path, oflag, mode);
4228 if (fd == -1) return -1;
4229
4230 // If the open succeeded, the file might still be a directory
4231 {
4232 struct stat64 buf64;
4233 int ret = ::fstat64(fd, &buf64);
4234 int st_mode = buf64.st_mode;
4235
4236 if (ret != -1) {
4237 if ((st_mode & S_IFMT) == S_IFDIR) {
4238 errno = EISDIR;
4239 ::close(fd);
4240 return -1;
4241 }
4242 } else {
4243 ::close(fd);
4244 return -1;
4245 }
4246 }
4247
4248 // 32-bit Solaris systems suffer from:
4249 //
4250 // - an historical default soft limit of 256 per-process file
4251 // descriptors that is too low for many Java programs.
4252 //
4253 // - a design flaw where file descriptors created using stdio
4254 // fopen must be less than 256, _even_ when the first limit above
4255 // has been raised. This can cause calls to fopen (but not calls to
4256 // open, for example) to fail mysteriously, perhaps in 3rd party
4257 // native code (although the JDK itself uses fopen). One can hardly
4258 // criticize them for using this most standard of all functions.
4259 //
4260 // We attempt to make everything work anyways by:
4261 //
4262 // - raising the soft limit on per-process file descriptors beyond
4263 // 256
4264 //
4265 // - As of Solaris 10u4, we can request that Solaris raise the 256
4266 // stdio fopen limit by calling function enable_extended_FILE_stdio.
4267 // This is done in init_2 and recorded in enabled_extended_FILE_stdio
4268 //
4269 // - If we are stuck on an old (pre 10u4) Solaris system, we can
4270 // workaround the bug by remapping non-stdio file descriptors below
4271 // 256 to ones beyond 256, which is done below.
4272 //
4273 // See:
4274 // 1085341: 32-bit stdio routines should support file descriptors >255
4275 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files
4276 // 6431278: Netbeans crash on 32 bit Solaris: need to call
4277 // enable_extended_FILE_stdio() in VM initialisation
4278 // Giri Mandalika's blog
4279 // http://technopark02.blogspot.com/2005_05_01_archive.html
4280 //
4281 #ifndef _LP64
4282 if ((!enabled_extended_FILE_stdio) && fd < 256) {
4283 int newfd = ::fcntl(fd, F_DUPFD, 256);
4284 if (newfd != -1) {
4285 ::close(fd);
4286 fd = newfd;
4287 }
4288 }
4289 #endif // 32-bit Solaris
4290
4291 // All file descriptors that are opened in the JVM and not
4292 // specifically destined for a subprocess should have the
4293 // close-on-exec flag set. If we don't set it, then careless 3rd
4294 // party native code might fork and exec without closing all
4295 // appropriate file descriptors (e.g. as we do in closeDescriptors in
4296 // UNIXProcess.c), and this in turn might:
4297 //
4298 // - cause end-of-file to fail to be detected on some file
4299 // descriptors, resulting in mysterious hangs, or
4300 //
4301 // - might cause an fopen in the subprocess to fail on a system
4302 // suffering from bug 1085341.
4303 //
4304 // (Yes, the default setting of the close-on-exec flag is a Unix
4305 // design flaw)
4306 //
4307 // See:
4308 // 1085341: 32-bit stdio routines should support file descriptors >255
4309 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed
4310 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
4311 //
4312 #ifdef FD_CLOEXEC
4313 {
4314 int flags = ::fcntl(fd, F_GETFD);
4315 if (flags != -1) {
4316 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
4317 }
4318 }
4319 #endif
4320
4321 return fd;
4322 }
4323
4324 // create binary file, rewriting existing file if required
4325 int os::create_binary_file(const char* path, bool rewrite_existing) {
4326 int oflags = O_WRONLY | O_CREAT;
4327 if (!rewrite_existing) {
4328 oflags |= O_EXCL;
4329 }
4330 return ::open64(path, oflags, S_IREAD | S_IWRITE);
4331 }
4332
4333 // return current position of file pointer
4334 jlong os::current_file_offset(int fd) {
4335 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
4336 }
4337
4338 // move file pointer to the specified offset
4339 jlong os::seek_to_file_offset(int fd, jlong offset) {
4340 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
4341 }
4342
4343 jlong os::lseek(int fd, jlong offset, int whence) {
4344 return (jlong) ::lseek64(fd, offset, whence);
4345 }
4346
4347 int os::ftruncate(int fd, jlong length) {
4348 return ::ftruncate64(fd, length);
4349 }
4350
4351 int os::fsync(int fd) {
4352 RESTARTABLE_RETURN_INT(::fsync(fd));
4353 }
4354
4355 int os::available(int fd, jlong *bytes) {
4356 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
4357 "Assumed _thread_in_native");
4358 jlong cur, end;
4359 int mode;
4360 struct stat64 buf64;
4361
4362 if (::fstat64(fd, &buf64) >= 0) {
4363 mode = buf64.st_mode;
4364 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
4365 int n,ioctl_return;
4366
4367 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return);
4368 if (ioctl_return>= 0) {
4369 *bytes = n;
4370 return 1;
4371 }
4372 }
4373 }
4374 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
4375 return 0;
4376 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
4377 return 0;
4378 } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
4379 return 0;
4380 }
4381 *bytes = end - cur;
4382 return 1;
4383 }
4384
4385 // Map a block of memory.
4386 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
4387 char *addr, size_t bytes, bool read_only,
4388 bool allow_exec) {
4389 int prot;
4390 int flags;
4391
4392 if (read_only) {
4393 prot = PROT_READ;
4394 flags = MAP_SHARED;
4395 } else {
4396 prot = PROT_READ | PROT_WRITE;
4397 flags = MAP_PRIVATE;
4398 }
4399
4400 if (allow_exec) {
4401 prot |= PROT_EXEC;
4402 }
4403
4404 if (addr != NULL) {
4405 flags |= MAP_FIXED;
4406 }
4407
4408 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
4409 fd, file_offset);
4410 if (mapped_address == MAP_FAILED) {
4411 return NULL;
4412 }
4413 return mapped_address;
4414 }
4415
4416
4417 // Remap a block of memory.
4418 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
4419 char *addr, size_t bytes, bool read_only,
4420 bool allow_exec) {
4421 // same as map_memory() on this OS
4422 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
4423 allow_exec);
4424 }
4425
4426
4427 // Unmap a block of memory.
4428 bool os::pd_unmap_memory(char* addr, size_t bytes) {
4429 return munmap(addr, bytes) == 0;
4430 }
4431
4432 void os::pause() {
4433 char filename[MAX_PATH];
4434 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
4435 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
4436 } else {
4437 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
4438 }
4439
4440 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
4441 if (fd != -1) {
4442 struct stat buf;
4443 ::close(fd);
4444 while (::stat(filename, &buf) == 0) {
4445 (void)::poll(NULL, 0, 100);
4446 }
4447 } else {
4448 jio_fprintf(stderr,
4449 "Could not open pause file '%s', continuing immediately.\n", filename);
4450 }
4451 }
4452
4453 #ifndef PRODUCT
4454 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
4455 // Turn this on if you need to trace synch operations.
4456 // Set RECORD_SYNCH_LIMIT to a large-enough value,
4457 // and call record_synch_enable and record_synch_disable
4458 // around the computation of interest.
4459
4460 void record_synch(char* name, bool returning); // defined below
4461
4462 class RecordSynch {
4463 char* _name;
4464 public:
4465 RecordSynch(char* name) :_name(name) { record_synch(_name, false); }
4466 ~RecordSynch() { record_synch(_name, true); }
4467 };
4468
4469 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \
4470 extern "C" ret name params { \
4471 typedef ret name##_t params; \
4472 static name##_t* implem = NULL; \
4473 static int callcount = 0; \
4474 if (implem == NULL) { \
4475 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \
4476 if (implem == NULL) fatal(dlerror()); \
4477 } \
4478 ++callcount; \
4479 RecordSynch _rs(#name); \
4480 inner; \
4481 return implem args; \
4482 }
4483 // in dbx, examine callcounts this way:
4484 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done
4485
4486 #define CHECK_POINTER_OK(p) \
4487 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p)))
4488 #define CHECK_MU \
4489 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only.");
4490 #define CHECK_CV \
4491 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only.");
4492 #define CHECK_P(p) \
4493 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only.");
4494
4495 #define CHECK_MUTEX(mutex_op) \
4496 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU);
4497
4498 CHECK_MUTEX( mutex_lock)
4499 CHECK_MUTEX( _mutex_lock)
4500 CHECK_MUTEX( mutex_unlock)
4501 CHECK_MUTEX(_mutex_unlock)
4502 CHECK_MUTEX( mutex_trylock)
4503 CHECK_MUTEX(_mutex_trylock)
4504
4505 #define CHECK_COND(cond_op) \
4506 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV);
4507
4508 CHECK_COND( cond_wait);
4509 CHECK_COND(_cond_wait);
4510 CHECK_COND(_cond_wait_cancel);
4511
4512 #define CHECK_COND2(cond_op) \
4513 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV);
4514
4515 CHECK_COND2( cond_timedwait);
4516 CHECK_COND2(_cond_timedwait);
4517 CHECK_COND2(_cond_timedwait_cancel);
4518
4519 // do the _lwp_* versions too
4520 #define mutex_t lwp_mutex_t
4521 #define cond_t lwp_cond_t
4522 CHECK_MUTEX( _lwp_mutex_lock)
4523 CHECK_MUTEX( _lwp_mutex_unlock)
4524 CHECK_MUTEX( _lwp_mutex_trylock)
4525 CHECK_MUTEX( __lwp_mutex_lock)
4526 CHECK_MUTEX( __lwp_mutex_unlock)
4527 CHECK_MUTEX( __lwp_mutex_trylock)
4528 CHECK_MUTEX(___lwp_mutex_lock)
4529 CHECK_MUTEX(___lwp_mutex_unlock)
4530
4531 CHECK_COND( _lwp_cond_wait);
4532 CHECK_COND( __lwp_cond_wait);
4533 CHECK_COND(___lwp_cond_wait);
4534
4535 CHECK_COND2( _lwp_cond_timedwait);
4536 CHECK_COND2( __lwp_cond_timedwait);
4537 #undef mutex_t
4538 #undef cond_t
4539
4540 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
4541 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0);
4542 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0);
4543 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0);
4544 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
4545 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p));
4546 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
4547 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV);
4548
4549
4550 // recording machinery:
4551
4552 enum { RECORD_SYNCH_LIMIT = 200 };
4553 char* record_synch_name[RECORD_SYNCH_LIMIT];
4554 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT];
4555 bool record_synch_returning[RECORD_SYNCH_LIMIT];
4556 thread_t record_synch_thread[RECORD_SYNCH_LIMIT];
4557 int record_synch_count = 0;
4558 bool record_synch_enabled = false;
4559
4560 // in dbx, examine recorded data this way:
4561 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done
4562
4563 void record_synch(char* name, bool returning) {
4564 if (record_synch_enabled) {
4565 if (record_synch_count < RECORD_SYNCH_LIMIT) {
4566 record_synch_name[record_synch_count] = name;
4567 record_synch_returning[record_synch_count] = returning;
4568 record_synch_thread[record_synch_count] = thr_self();
4569 record_synch_arg0ptr[record_synch_count] = &name;
4570 record_synch_count++;
4571 }
4572 // put more checking code here:
4573 // ...
4574 }
4575 }
4576
4577 void record_synch_enable() {
4578 // start collecting trace data, if not already doing so
4579 if (!record_synch_enabled) record_synch_count = 0;
4580 record_synch_enabled = true;
4581 }
4582
4583 void record_synch_disable() {
4584 // stop collecting trace data
4585 record_synch_enabled = false;
4586 }
4587
4588 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS
4589 #endif // PRODUCT
4590
4591 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
4592 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) -
4593 (intptr_t)(&((prusage_t *)(NULL))->pr_utime);
4594
4595
4596 // JVMTI & JVM monitoring and management support
4597 // The thread_cpu_time() and current_thread_cpu_time() are only
4598 // supported if is_thread_cpu_time_supported() returns true.
4599 // They are not supported on Solaris T1.
4600
4601 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
4602 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
4603 // of a thread.
4604 //
4605 // current_thread_cpu_time() and thread_cpu_time(Thread *)
4606 // returns the fast estimate available on the platform.
4607
4608 // hrtime_t gethrvtime() return value includes
4609 // user time but does not include system time
4610 jlong os::current_thread_cpu_time() {
4611 return (jlong) gethrvtime();
4612 }
4613
4614 jlong os::thread_cpu_time(Thread *thread) {
4615 // return user level CPU time only to be consistent with
4616 // what current_thread_cpu_time returns.
4617 // thread_cpu_time_info() must be changed if this changes
4618 return os::thread_cpu_time(thread, false /* user time only */);
4619 }
4620
4621 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
4622 if (user_sys_cpu_time) {
4623 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
4624 } else {
4625 return os::current_thread_cpu_time();
4626 }
4627 }
4628
4629 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
4630 char proc_name[64];
4631 int count;
4632 prusage_t prusage;
4633 jlong lwp_time;
4634 int fd;
4635
4636 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage",
4637 getpid(),
4638 thread->osthread()->lwp_id());
4639 fd = ::open(proc_name, O_RDONLY);
4640 if (fd == -1) return -1;
4641
4642 do {
4643 count = ::pread(fd,
4644 (void *)&prusage.pr_utime,
4645 thr_time_size,
4646 thr_time_off);
4647 } while (count < 0 && errno == EINTR);
4648 ::close(fd);
4649 if (count < 0) return -1;
4650
4651 if (user_sys_cpu_time) {
4652 // user + system CPU time
4653 lwp_time = (((jlong)prusage.pr_stime.tv_sec +
4654 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) +
4655 (jlong)prusage.pr_stime.tv_nsec +
4656 (jlong)prusage.pr_utime.tv_nsec;
4657 } else {
4658 // user level CPU time only
4659 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) +
4660 (jlong)prusage.pr_utime.tv_nsec;
4661 }
4662
4663 return (lwp_time);
4664 }
4665
4666 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
4667 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
4668 info_ptr->may_skip_backward = false; // elapsed time not wall time
4669 info_ptr->may_skip_forward = false; // elapsed time not wall time
4670 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
4671 }
4672
4673 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
4674 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits
4675 info_ptr->may_skip_backward = false; // elapsed time not wall time
4676 info_ptr->may_skip_forward = false; // elapsed time not wall time
4677 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned
4678 }
4679
4680 bool os::is_thread_cpu_time_supported() {
4681 return true;
4682 }
4683
4684 // System loadavg support. Returns -1 if load average cannot be obtained.
4685 // Return the load average for our processor set if the primitive exists
4686 // (Solaris 9 and later). Otherwise just return system wide loadavg.
4687 int os::loadavg(double loadavg[], int nelem) {
4688 if (pset_getloadavg_ptr != NULL) {
4689 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem);
4690 } else {
4691 return ::getloadavg(loadavg, nelem);
4692 }
4693 }
4694
4695 //---------------------------------------------------------------------------------
4696
4697 bool os::find(address addr, outputStream* st) {
4698 Dl_info dlinfo;
4699 memset(&dlinfo, 0, sizeof(dlinfo));
4700 if (dladdr(addr, &dlinfo) != 0) {
4701 st->print(PTR_FORMAT ": ", addr);
4702 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
4703 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr);
4704 } else if (dlinfo.dli_fbase != NULL) {
4705 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase);
4706 } else {
4707 st->print("<absolute address>");
4708 }
4709 if (dlinfo.dli_fname != NULL) {
4710 st->print(" in %s", dlinfo.dli_fname);
4711 }
4712 if (dlinfo.dli_fbase != NULL) {
4713 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
4714 }
4715 st->cr();
4716
4717 if (Verbose) {
4718 // decode some bytes around the PC
4719 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size());
4720 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size());
4721 address lowest = (address) dlinfo.dli_sname;
4722 if (!lowest) lowest = (address) dlinfo.dli_fbase;
4723 if (begin < lowest) begin = lowest;
4724 Dl_info dlinfo2;
4725 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
4726 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) {
4727 end = (address) dlinfo2.dli_saddr;
4728 }
4729 Disassembler::decode(begin, end, st);
4730 }
4731 return true;
4732 }
4733 return false;
4734 }
4735
4736 // Following function has been added to support HotSparc's libjvm.so running
4737 // under Solaris production JDK 1.2.2 / 1.3.0. These came from
4738 // src/solaris/hpi/native_threads in the EVM codebase.
4739 //
4740 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release
4741 // libraries and should thus be removed. We will leave it behind for a while
4742 // until we no longer want to able to run on top of 1.3.0 Solaris production
4743 // JDK. See 4341971.
4744
4745 #define STACK_SLACK 0x800
4746
4747 extern "C" {
4748 intptr_t sysThreadAvailableStackWithSlack() {
4749 stack_t st;
4750 intptr_t retval, stack_top;
4751 retval = thr_stksegment(&st);
4752 assert(retval == 0, "incorrect return value from thr_stksegment");
4753 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned");
4754 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned");
4755 stack_top=(intptr_t)st.ss_sp-st.ss_size;
4756 return ((intptr_t)&stack_top - stack_top - STACK_SLACK);
4757 }
4758 }
4759
4760 // ObjectMonitor park-unpark infrastructure ...
4761 //
4762 // We implement Solaris and Linux PlatformEvents with the
4763 // obvious condvar-mutex-flag triple.
4764 // Another alternative that works quite well is pipes:
4765 // Each PlatformEvent consists of a pipe-pair.
4766 // The thread associated with the PlatformEvent
4767 // calls park(), which reads from the input end of the pipe.
4768 // Unpark() writes into the other end of the pipe.
4769 // The write-side of the pipe must be set NDELAY.
4770 // Unfortunately pipes consume a large # of handles.
4771 // Native solaris lwp_park() and lwp_unpark() work nicely, too.
4772 // Using pipes for the 1st few threads might be workable, however.
4773 //
4774 // park() is permitted to return spuriously.
4775 // Callers of park() should wrap the call to park() in
4776 // an appropriate loop. A litmus test for the correct
4777 // usage of park is the following: if park() were modified
4778 // to immediately return 0 your code should still work,
4779 // albeit degenerating to a spin loop.
4780 //
4781 // In a sense, park()-unpark() just provides more polite spinning
4782 // and polling with the key difference over naive spinning being
4783 // that a parked thread needs to be explicitly unparked() in order
4784 // to wake up and to poll the underlying condition.
4785 //
4786 // Assumption:
4787 // Only one parker can exist on an event, which is why we allocate
4788 // them per-thread. Multiple unparkers can coexist.
4789 //
4790 // _Event transitions in park()
4791 // -1 => -1 : illegal
4792 // 1 => 0 : pass - return immediately
4793 // 0 => -1 : block; then set _Event to 0 before returning
4794 //
4795 // _Event transitions in unpark()
4796 // 0 => 1 : just return
4797 // 1 => 1 : just return
4798 // -1 => either 0 or 1; must signal target thread
4799 // That is, we can safely transition _Event from -1 to either
4800 // 0 or 1.
4801 //
4802 // _Event serves as a restricted-range semaphore.
4803 // -1 : thread is blocked, i.e. there is a waiter
4804 // 0 : neutral: thread is running or ready,
4805 // could have been signaled after a wait started
4806 // 1 : signaled - thread is running or ready
4807 //
4808 // Another possible encoding of _Event would be with
4809 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits.
4810 //
4811 // TODO-FIXME: add DTRACE probes for:
4812 // 1. Tx parks
4813 // 2. Ty unparks Tx
4814 // 3. Tx resumes from park
4815
4816
4817 // value determined through experimentation
4818 #define ROUNDINGFIX 11
4819
4820 // utility to compute the abstime argument to timedwait.
4821 // TODO-FIXME: switch from compute_abstime() to unpackTime().
4822
4823 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) {
4824 // millis is the relative timeout time
4825 // abstime will be the absolute timeout time
4826 if (millis < 0) millis = 0;
4827 struct timeval now;
4828 int status = gettimeofday(&now, NULL);
4829 assert(status == 0, "gettimeofday");
4830 jlong seconds = millis / 1000;
4831 jlong max_wait_period;
4832
4833 if (UseLWPSynchronization) {
4834 // forward port of fix for 4275818 (not sleeping long enough)
4835 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where
4836 // _lwp_cond_timedwait() used a round_down algorithm rather
4837 // than a round_up. For millis less than our roundfactor
4838 // it rounded down to 0 which doesn't meet the spec.
4839 // For millis > roundfactor we may return a bit sooner, but
4840 // since we can not accurately identify the patch level and
4841 // this has already been fixed in Solaris 9 and 8 we will
4842 // leave it alone rather than always rounding down.
4843
4844 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX;
4845 // It appears that when we go directly through Solaris _lwp_cond_timedwait()
4846 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6
4847 max_wait_period = 21000000;
4848 } else {
4849 max_wait_period = 50000000;
4850 }
4851 millis %= 1000;
4852 if (seconds > max_wait_period) { // see man cond_timedwait(3T)
4853 seconds = max_wait_period;
4854 }
4855 abstime->tv_sec = now.tv_sec + seconds;
4856 long usec = now.tv_usec + millis * 1000;
4857 if (usec >= 1000000) {
4858 abstime->tv_sec += 1;
4859 usec -= 1000000;
4860 }
4861 abstime->tv_nsec = usec * 1000;
4862 return abstime;
4863 }
4864
4865 void os::PlatformEvent::park() { // AKA: down()
4866 // Transitions for _Event:
4867 // -1 => -1 : illegal
4868 // 1 => 0 : pass - return immediately
4869 // 0 => -1 : block; then set _Event to 0 before returning
4870
4871 // Invariant: Only the thread associated with the Event/PlatformEvent
4872 // may call park().
4873 assert(_nParked == 0, "invariant");
4874
4875 int v;
4876 for (;;) {
4877 v = _Event;
4878 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
4879 }
4880 guarantee(v >= 0, "invariant");
4881 if (v == 0) {
4882 // Do this the hard way by blocking ...
4883 // See http://monaco.sfbay/detail.jsf?cr=5094058.
4884 int status = os::Solaris::mutex_lock(_mutex);
4885 assert_status(status == 0, status, "mutex_lock");
4886 guarantee(_nParked == 0, "invariant");
4887 ++_nParked;
4888 while (_Event < 0) {
4889 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
4890 // Treat this the same as if the wait was interrupted
4891 // With usr/lib/lwp going to kernel, always handle ETIME
4892 status = os::Solaris::cond_wait(_cond, _mutex);
4893 if (status == ETIME) status = EINTR;
4894 assert_status(status == 0 || status == EINTR, status, "cond_wait");
4895 }
4896 --_nParked;
4897 _Event = 0;
4898 status = os::Solaris::mutex_unlock(_mutex);
4899 assert_status(status == 0, status, "mutex_unlock");
4900 // Paranoia to ensure our locked and lock-free paths interact
4901 // correctly with each other.
4902 OrderAccess::fence();
4903 }
4904 }
4905
4906 int os::PlatformEvent::park(jlong millis) {
4907 // Transitions for _Event:
4908 // -1 => -1 : illegal
4909 // 1 => 0 : pass - return immediately
4910 // 0 => -1 : block; then set _Event to 0 before returning
4911
4912 guarantee(_nParked == 0, "invariant");
4913 int v;
4914 for (;;) {
4915 v = _Event;
4916 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break;
4917 }
4918 guarantee(v >= 0, "invariant");
4919 if (v != 0) return OS_OK;
4920
4921 int ret = OS_TIMEOUT;
4922 timestruc_t abst;
4923 compute_abstime(&abst, millis);
4924
4925 // See http://monaco.sfbay/detail.jsf?cr=5094058.
4926 int status = os::Solaris::mutex_lock(_mutex);
4927 assert_status(status == 0, status, "mutex_lock");
4928 guarantee(_nParked == 0, "invariant");
4929 ++_nParked;
4930 while (_Event < 0) {
4931 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst);
4932 assert_status(status == 0 || status == EINTR ||
4933 status == ETIME || status == ETIMEDOUT,
4934 status, "cond_timedwait");
4935 if (!FilterSpuriousWakeups) break; // previous semantics
4936 if (status == ETIME || status == ETIMEDOUT) break;
4937 // We consume and ignore EINTR and spurious wakeups.
4938 }
4939 --_nParked;
4940 if (_Event >= 0) ret = OS_OK;
4941 _Event = 0;
4942 status = os::Solaris::mutex_unlock(_mutex);
4943 assert_status(status == 0, status, "mutex_unlock");
4944 // Paranoia to ensure our locked and lock-free paths interact
4945 // correctly with each other.
4946 OrderAccess::fence();
4947 return ret;
4948 }
4949
4950 void os::PlatformEvent::unpark() {
4951 // Transitions for _Event:
4952 // 0 => 1 : just return
4953 // 1 => 1 : just return
4954 // -1 => either 0 or 1; must signal target thread
4955 // That is, we can safely transition _Event from -1 to either
4956 // 0 or 1.
4957 // See also: "Semaphores in Plan 9" by Mullender & Cox
4958 //
4959 // Note: Forcing a transition from "-1" to "1" on an unpark() means
4960 // that it will take two back-to-back park() calls for the owning
4961 // thread to block. This has the benefit of forcing a spurious return
4962 // from the first park() call after an unpark() call which will help
4963 // shake out uses of park() and unpark() without condition variables.
4964
4965 if (Atomic::xchg(1, &_Event) >= 0) return;
4966
4967 // If the thread associated with the event was parked, wake it.
4968 // Wait for the thread assoc with the PlatformEvent to vacate.
4969 int status = os::Solaris::mutex_lock(_mutex);
4970 assert_status(status == 0, status, "mutex_lock");
4971 int AnyWaiters = _nParked;
4972 status = os::Solaris::mutex_unlock(_mutex);
4973 assert_status(status == 0, status, "mutex_unlock");
4974 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
4975 if (AnyWaiters != 0) {
4976 // Note that we signal() *after* dropping the lock for "immortal" Events.
4977 // This is safe and avoids a common class of futile wakeups. In rare
4978 // circumstances this can cause a thread to return prematurely from
4979 // cond_{timed}wait() but the spurious wakeup is benign and the victim
4980 // will simply re-test the condition and re-park itself.
4981 // This provides particular benefit if the underlying platform does not
4982 // provide wait morphing.
4983 status = os::Solaris::cond_signal(_cond);
4984 assert_status(status == 0, status, "cond_signal");
4985 }
4986 }
4987
4988 // JSR166
4989 // -------------------------------------------------------
4990
4991 // The solaris and linux implementations of park/unpark are fairly
4992 // conservative for now, but can be improved. They currently use a
4993 // mutex/condvar pair, plus _counter.
4994 // Park decrements _counter if > 0, else does a condvar wait. Unpark
4995 // sets count to 1 and signals condvar. Only one thread ever waits
4996 // on the condvar. Contention seen when trying to park implies that someone
4997 // is unparking you, so don't wait. And spurious returns are fine, so there
4998 // is no need to track notifications.
4999
5000 #define MAX_SECS 100000000
5001
5002 // This code is common to linux and solaris and will be moved to a
5003 // common place in dolphin.
5004 //
5005 // The passed in time value is either a relative time in nanoseconds
5006 // or an absolute time in milliseconds. Either way it has to be unpacked
5007 // into suitable seconds and nanoseconds components and stored in the
5008 // given timespec structure.
5009 // Given time is a 64-bit value and the time_t used in the timespec is only
5010 // a signed-32-bit value (except on 64-bit Linux) we have to watch for
5011 // overflow if times way in the future are given. Further on Solaris versions
5012 // prior to 10 there is a restriction (see cond_timedwait) that the specified
5013 // number of seconds, in abstime, is less than current_time + 100,000,000.
5014 // As it will be 28 years before "now + 100000000" will overflow we can
5015 // ignore overflow and just impose a hard-limit on seconds using the value
5016 // of "now + 100,000,000". This places a limit on the timeout of about 3.17
5017 // years from "now".
5018 //
5019 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
5020 assert(time > 0, "convertTime");
5021
5022 struct timeval now;
5023 int status = gettimeofday(&now, NULL);
5024 assert(status == 0, "gettimeofday");
5025
5026 time_t max_secs = now.tv_sec + MAX_SECS;
5027
5028 if (isAbsolute) {
5029 jlong secs = time / 1000;
5030 if (secs > max_secs) {
5031 absTime->tv_sec = max_secs;
5032 } else {
5033 absTime->tv_sec = secs;
5034 }
5035 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
5036 } else {
5037 jlong secs = time / NANOSECS_PER_SEC;
5038 if (secs >= MAX_SECS) {
5039 absTime->tv_sec = max_secs;
5040 absTime->tv_nsec = 0;
5041 } else {
5042 absTime->tv_sec = now.tv_sec + secs;
5043 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
5044 if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
5045 absTime->tv_nsec -= NANOSECS_PER_SEC;
5046 ++absTime->tv_sec; // note: this must be <= max_secs
5047 }
5048 }
5049 }
5050 assert(absTime->tv_sec >= 0, "tv_sec < 0");
5051 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
5052 assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
5053 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
5054 }
5055
5056 void Parker::park(bool isAbsolute, jlong time) {
5057 // Ideally we'd do something useful while spinning, such
5058 // as calling unpackTime().
5059
5060 // Optional fast-path check:
5061 // Return immediately if a permit is available.
5062 // We depend on Atomic::xchg() having full barrier semantics
5063 // since we are doing a lock-free update to _counter.
5064 if (Atomic::xchg(0, &_counter) > 0) return;
5065
5066 // Optional fast-exit: Check interrupt before trying to wait
5067 Thread* thread = Thread::current();
5068 assert(thread->is_Java_thread(), "Must be JavaThread");
5069 JavaThread *jt = (JavaThread *)thread;
5070 if (Thread::is_interrupted(thread, false)) {
5071 return;
5072 }
5073
5074 // First, demultiplex/decode time arguments
5075 timespec absTime;
5076 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all
5077 return;
5078 }
5079 if (time > 0) {
5080 // Warning: this code might be exposed to the old Solaris time
5081 // round-down bugs. Grep "roundingFix" for details.
5082 unpackTime(&absTime, isAbsolute, time);
5083 }
5084
5085 // Enter safepoint region
5086 // Beware of deadlocks such as 6317397.
5087 // The per-thread Parker:: _mutex is a classic leaf-lock.
5088 // In particular a thread must never block on the Threads_lock while
5089 // holding the Parker:: mutex. If safepoints are pending both the
5090 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
5091 ThreadBlockInVM tbivm(jt);
5092
5093 // Don't wait if cannot get lock since interference arises from
5094 // unblocking. Also. check interrupt before trying wait
5095 if (Thread::is_interrupted(thread, false) ||
5096 os::Solaris::mutex_trylock(_mutex) != 0) {
5097 return;
5098 }
5099
5100 int status;
5101
5102 if (_counter > 0) { // no wait needed
5103 _counter = 0;
5104 status = os::Solaris::mutex_unlock(_mutex);
5105 assert(status == 0, "invariant");
5106 // Paranoia to ensure our locked and lock-free paths interact
5107 // correctly with each other and Java-level accesses.
5108 OrderAccess::fence();
5109 return;
5110 }
5111
5112 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
5113 jt->set_suspend_equivalent();
5114 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
5115
5116 // Do this the hard way by blocking ...
5117 // See http://monaco.sfbay/detail.jsf?cr=5094058.
5118 if (time == 0) {
5119 status = os::Solaris::cond_wait(_cond, _mutex);
5120 } else {
5121 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime);
5122 }
5123 // Note that an untimed cond_wait() can sometimes return ETIME on older
5124 // versions of the Solaris.
5125 assert_status(status == 0 || status == EINTR ||
5126 status == ETIME || status == ETIMEDOUT,
5127 status, "cond_timedwait");
5128
5129 _counter = 0;
5130 status = os::Solaris::mutex_unlock(_mutex);
5131 assert_status(status == 0, status, "mutex_unlock");
5132 // Paranoia to ensure our locked and lock-free paths interact
5133 // correctly with each other and Java-level accesses.
5134 OrderAccess::fence();
5135
5136 // If externally suspended while waiting, re-suspend
5137 if (jt->handle_special_suspend_equivalent_condition()) {
5138 jt->java_suspend_self();
5139 }
5140 }
5141
5142 void Parker::unpark() {
5143 int status = os::Solaris::mutex_lock(_mutex);
5144 assert(status == 0, "invariant");
5145 const int s = _counter;
5146 _counter = 1;
5147 status = os::Solaris::mutex_unlock(_mutex);
5148 assert(status == 0, "invariant");
5149
5150 if (s < 1) {
5151 status = os::Solaris::cond_signal(_cond);
5152 assert(status == 0, "invariant");
5153 }
5154 }
5155
5156 // Platform Mutex/Monitor implementations
5157
5158 os::PlatformMutex::PlatformMutex() {
5159 int status = os::Solaris::mutex_init(&_mutex);
5160 assert_status(status == 0, status, "mutex_init");
5161 }
5162
5163 os::PlatformMutex::~PlatformMutex() {
5164 int status = os::Solaris::mutex_destroy(&_mutex);
5165 assert_status(status == 0, status, "mutex_destroy");
5166 }
5167
5168 void os::PlatformMutex::lock() {
5169 int status = os::Solaris::mutex_lock(&_mutex);
5170 assert_status(status == 0, status, "mutex_lock");
5171 }
5172
5173 void os::PlatformMutex::unlock() {
5174 int status = os::Solaris::mutex_unlock(&_mutex);
5175 assert_status(status == 0, status, "mutex_unlock");
5176 }
5177
5178 bool os::PlatformMutex::try_lock() {
5179 int status = os::Solaris::mutex_trylock(&_mutex);
5180 assert_status(status == 0 || status == EBUSY, status, "mutex_trylock");
5181 return status == 0;
5182 }
5183
5184 os::PlatformMonitor::PlatformMonitor() {
5185 int status = os::Solaris::cond_init(&_cond);
5186 assert_status(status == 0, status, "cond_init");
5187 }
5188
5189 os::PlatformMonitor::~PlatformMonitor() {
5190 int status = os::Solaris::cond_destroy(&_cond);
5191 assert_status(status == 0, status, "cond_destroy");
5192 }
5193
5194 // Must already be locked
5195 int os::PlatformMonitor::wait(jlong millis) {
5196 assert(millis >= 0, "negative timeout");
5197 if (millis > 0) {
5198 timestruc_t abst;
5199 int ret = OS_TIMEOUT;
5200 compute_abstime(&abst, millis);
5201 int status = os::Solaris::cond_timedwait(&_cond, &_mutex, &abst);
5202 assert_status(status == 0 || status == EINTR ||
5203 status == ETIME || status == ETIMEDOUT,
5204 status, "cond_timedwait");
5205 // EINTR acts as spurious wakeup - which is permitted anyway
5206 if (status == 0 || status == EINTR) {
5207 ret = OS_OK;
5208 }
5209 return ret;
5210 } else {
5211 int status = os::Solaris::cond_wait(&_cond, &_mutex);
5212 assert_status(status == 0 || status == EINTR,
5213 status, "cond_wait");
5214 return OS_OK;
5215 }
5216 }
5217
5218 void os::PlatformMonitor::notify() {
5219 int status = os::Solaris::cond_signal(&_cond);
5220 assert_status(status == 0, status, "cond_signal");
5221 }
5222
5223 void os::PlatformMonitor::notify_all() {
5224 int status = os::Solaris::cond_broadcast(&_cond);
5225 assert_status(status == 0, status, "cond_broadcast");
5226 }
5227
5228 extern char** environ;
5229
5230 // Run the specified command in a separate process. Return its exit value,
5231 // or -1 on failure (e.g. can't fork a new process).
5232 // Unlike system(), this function can be called from signal handler. It
5233 // doesn't block SIGINT et al.
5234 int os::fork_and_exec(char* cmd, bool use_vfork_if_available) {
5235 char * argv[4];
5236 argv[0] = (char *)"sh";
5237 argv[1] = (char *)"-c";
5238 argv[2] = cmd;
5239 argv[3] = NULL;
5240
5241 // fork is async-safe, fork1 is not so can't use in signal handler
5242 pid_t pid;
5243 Thread* t = Thread::current_or_null_safe();
5244 if (t != NULL && t->is_inside_signal_handler()) {
5245 pid = fork();
5246 } else {
5247 pid = fork1();
5248 }
5249
5250 if (pid < 0) {
5251 // fork failed
5252 warning("fork failed: %s", os::strerror(errno));
5253 return -1;
5254
5255 } else if (pid == 0) {
5256 // child process
5257
5258 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris
5259 execve("/usr/bin/sh", argv, environ);
5260
5261 // execve failed
5262 _exit(-1);
5263
5264 } else {
5265 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
5266 // care about the actual exit code, for now.
5267
5268 int status;
5269
5270 // Wait for the child process to exit. This returns immediately if
5271 // the child has already exited. */
5272 while (waitpid(pid, &status, 0) < 0) {
5273 switch (errno) {
5274 case ECHILD: return 0;
5275 case EINTR: break;
5276 default: return -1;
5277 }
5278 }
5279
5280 if (WIFEXITED(status)) {
5281 // The child exited normally; get its exit code.
5282 return WEXITSTATUS(status);
5283 } else if (WIFSIGNALED(status)) {
5284 // The child exited because of a signal
5285 // The best value to return is 0x80 + signal number,
5286 // because that is what all Unix shells do, and because
5287 // it allows callers to distinguish between process exit and
5288 // process death by signal.
5289 return 0x80 + WTERMSIG(status);
5290 } else {
5291 // Unknown exit code; pass it through
5292 return status;
5293 }
5294 }
5295 }
5296
5297 size_t os::write(int fd, const void *buf, unsigned int nBytes) {
5298 size_t res;
5299 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
5300 return res;
5301 }
5302
5303 int os::close(int fd) {
5304 return ::close(fd);
5305 }
5306
5307 int os::socket_close(int fd) {
5308 return ::close(fd);
5309 }
5310
5311 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
5312 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5313 "Assumed _thread_in_native");
5314 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags));
5315 }
5316
5317 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
5318 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native,
5319 "Assumed _thread_in_native");
5320 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5321 }
5322
5323 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
5324 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags));
5325 }
5326
5327 // As both poll and select can be interrupted by signals, we have to be
5328 // prepared to restart the system call after updating the timeout, unless
5329 // a poll() is done with timeout == -1, in which case we repeat with this
5330 // "wait forever" value.
5331
5332 int os::connect(int fd, struct sockaddr *him, socklen_t len) {
5333 int _result;
5334 _result = ::connect(fd, him, len);
5335
5336 // On Solaris, when a connect() call is interrupted, the connection
5337 // can be established asynchronously (see 6343810). Subsequent calls
5338 // to connect() must check the errno value which has the semantic
5339 // described below (copied from the connect() man page). Handling
5340 // of asynchronously established connections is required for both
5341 // blocking and non-blocking sockets.
5342 // EINTR The connection attempt was interrupted
5343 // before any data arrived by the delivery of
5344 // a signal. The connection, however, will be
5345 // established asynchronously.
5346 //
5347 // EINPROGRESS The socket is non-blocking, and the connec-
5348 // tion cannot be completed immediately.
5349 //
5350 // EALREADY The socket is non-blocking, and a previous
5351 // connection attempt has not yet been com-
5352 // pleted.
5353 //
5354 // EISCONN The socket is already connected.
5355 if (_result == OS_ERR && errno == EINTR) {
5356 // restarting a connect() changes its errno semantics
5357 RESTARTABLE(::connect(fd, him, len), _result);
5358 // undo these changes
5359 if (_result == OS_ERR) {
5360 if (errno == EALREADY) {
5361 errno = EINPROGRESS; // fall through
5362 } else if (errno == EISCONN) {
5363 errno = 0;
5364 return OS_OK;
5365 }
5366 }
5367 }
5368 return _result;
5369 }
5370
5371 // Get the default path to the core file
5372 // Returns the length of the string
5373 int os::get_core_path(char* buffer, size_t bufferSize) {
5374 const char* p = get_current_directory(buffer, bufferSize);
5375
5376 if (p == NULL) {
5377 assert(p != NULL, "failed to get current directory");
5378 return 0;
5379 }
5380
5381 jio_snprintf(buffer, bufferSize, "%s/core or core.%d",
5382 p, current_process_id());
5383
5384 return strlen(buffer);
5385 }
5386
5387 bool os::supports_map_sync() {
5388 return false;
5389 }
5390
5391 #ifndef PRODUCT
5392 void TestReserveMemorySpecial_test() {
5393 // No tests available for this platform
5394 }
5395 #endif
5396
5397 bool os::start_debugging(char *buf, int buflen) {
5398 int len = (int)strlen(buf);
5399 char *p = &buf[len];
5400
5401 jio_snprintf(p, buflen-len,
5402 "\n\n"
5403 "Do you want to debug the problem?\n\n"
5404 "To debug, run 'dbx - %d'; then switch to thread " INTX_FORMAT "\n"
5405 "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n"
5406 "Otherwise, press RETURN to abort...",
5407 os::current_process_id(), os::current_thread_id());
5408
5409 bool yes = os::message_box("Unexpected Error", buf);
5410
5411 if (yes) {
5412 // yes, user asked VM to launch debugger
5413 jio_snprintf(buf, sizeof(buf), "dbx - %d", os::current_process_id());
5414
5415 os::fork_and_exec(buf);
5416 yes = false;
5417 }
5418 return yes;
5419 }