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comparison src/os/posix/vm/os_posix.cpp @ 14909:4ca6dc0799b6

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Backout jdk9 merge
author Gilles Duboscq <duboscq@ssw.jku.at>
date Tue, 01 Apr 2014 13:57:07 +0200
parents bb9356ec5967
children 52b4284cb496
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14908:8db6e76cb658 14909:4ca6dc0799b6
1 /* 1 /*
2 * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
8 * 8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT 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 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 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 12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code). 13 * accompanied this code).
14 * 14 *
15 * You should have received a copy of the GNU General Public License version 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, 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. 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 * 18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 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 20 * or visit www.oracle.com if you need additional information or have any
21 * questions. 21 * questions.
22 * 22 *
23 */ 23 */
24 24
25 #include "utilities/globalDefinitions.hpp"
26 #include "prims/jvm.h" 25 #include "prims/jvm.h"
27 #include "runtime/frame.inline.hpp" 26 #include "runtime/frame.inline.hpp"
28 #include "runtime/interfaceSupport.hpp"
29 #include "runtime/os.hpp" 27 #include "runtime/os.hpp"
30 #include "utilities/vmError.hpp" 28 #include "utilities/vmError.hpp"
31 29
32 #include <signal.h>
33 #include <unistd.h> 30 #include <unistd.h>
34 #include <sys/resource.h> 31 #include <sys/resource.h>
35 #include <sys/utsname.h> 32 #include <sys/utsname.h>
36 #include <pthread.h> 33 #include <pthread.h>
37 #include <signal.h> 34 #include <signal.h>
38 35
39 // Todo: provide a os::get_max_process_id() or similar. Number of processes
40 // may have been configured, can be read more accurately from proc fs etc.
41 #ifndef MAX_PID
42 #define MAX_PID INT_MAX
43 #endif
44 #define IS_VALID_PID(p) (p > 0 && p < MAX_PID)
45 36
46 // Check core dump limit and report possible place where core can be found 37 // Check core dump limit and report possible place where core can be found
47 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) { 38 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
48 int n; 39 int n;
49 struct rlimit rlim; 40 struct rlimit rlim;
165 st->print(", CORE "); 156 st->print(", CORE ");
166 getrlimit(RLIMIT_CORE, &rlim); 157 getrlimit(RLIMIT_CORE, &rlim);
167 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 158 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
168 else st->print("%uk", rlim.rlim_cur >> 10); 159 else st->print("%uk", rlim.rlim_cur >> 10);
169 160
170 // Isn't there on solaris 161 //Isn't there on solaris
171 #if !defined(TARGET_OS_FAMILY_solaris) && !defined(TARGET_OS_FAMILY_aix) 162 #ifndef TARGET_OS_FAMILY_solaris
172 st->print(", NPROC "); 163 st->print(", NPROC ");
173 getrlimit(RLIMIT_NPROC, &rlim); 164 getrlimit(RLIMIT_NPROC, &rlim);
174 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 165 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
175 else st->print("%d", rlim.rlim_cur); 166 else st->print("%d", rlim.rlim_cur);
176 #endif 167 #endif
267 return getcwd(buf, buflen); 258 return getcwd(buf, buflen);
268 } 259 }
269 260
270 FILE* os::open(int fd, const char* mode) { 261 FILE* os::open(int fd, const char* mode) {
271 return ::fdopen(fd, mode); 262 return ::fdopen(fd, mode);
263 }
264
265 void* os::get_default_process_handle() {
266 return (void*)::dlopen(NULL, RTLD_LAZY);
272 } 267 }
273 268
274 // Builds a platform dependent Agent_OnLoad_<lib_name> function name 269 // Builds a platform dependent Agent_OnLoad_<lib_name> function name
275 // which is used to find statically linked in agents. 270 // which is used to find statically linked in agents.
276 // Parameters: 271 // Parameters:
314 strncat(agent_entry_name, lib_name, name_len); 309 strncat(agent_entry_name, lib_name, name_len);
315 } 310 }
316 return agent_entry_name; 311 return agent_entry_name;
317 } 312 }
318 313
319 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
320 assert(thread == Thread::current(), "thread consistency check");
321
322 ParkEvent * const slp = thread->_SleepEvent ;
323 slp->reset() ;
324 OrderAccess::fence() ;
325
326 if (interruptible) {
327 jlong prevtime = javaTimeNanos();
328
329 for (;;) {
330 if (os::is_interrupted(thread, true)) {
331 return OS_INTRPT;
332 }
333
334 jlong newtime = javaTimeNanos();
335
336 if (newtime - prevtime < 0) {
337 // time moving backwards, should only happen if no monotonic clock
338 // not a guarantee() because JVM should not abort on kernel/glibc bugs
339 assert(!os::supports_monotonic_clock(), "unexpected time moving backwards detected in os::sleep(interruptible)");
340 } else {
341 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC;
342 }
343
344 if (millis <= 0) {
345 return OS_OK;
346 }
347
348 prevtime = newtime;
349
350 {
351 assert(thread->is_Java_thread(), "sanity check");
352 JavaThread *jt = (JavaThread *) thread;
353 ThreadBlockInVM tbivm(jt);
354 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
355
356 jt->set_suspend_equivalent();
357 // cleared by handle_special_suspend_equivalent_condition() or
358 // java_suspend_self() via check_and_wait_while_suspended()
359
360 slp->park(millis);
361
362 // were we externally suspended while we were waiting?
363 jt->check_and_wait_while_suspended();
364 }
365 }
366 } else {
367 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
368 jlong prevtime = javaTimeNanos();
369
370 for (;;) {
371 // It'd be nice to avoid the back-to-back javaTimeNanos() calls on
372 // the 1st iteration ...
373 jlong newtime = javaTimeNanos();
374
375 if (newtime - prevtime < 0) {
376 // time moving backwards, should only happen if no monotonic clock
377 // not a guarantee() because JVM should not abort on kernel/glibc bugs
378 assert(!os::supports_monotonic_clock(), "unexpected time moving backwards detected on os::sleep(!interruptible)");
379 } else {
380 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC;
381 }
382
383 if (millis <= 0) break ;
384
385 prevtime = newtime;
386 slp->park(millis);
387 }
388 return OS_OK ;
389 }
390 }
391
392 ////////////////////////////////////////////////////////////////////////////////
393 // interrupt support
394
395 void os::interrupt(Thread* thread) {
396 assert(Thread::current() == thread || Threads_lock->owned_by_self(),
397 "possibility of dangling Thread pointer");
398
399 OSThread* osthread = thread->osthread();
400
401 if (!osthread->interrupted()) {
402 osthread->set_interrupted(true);
403 // More than one thread can get here with the same value of osthread,
404 // resulting in multiple notifications. We do, however, want the store
405 // to interrupted() to be visible to other threads before we execute unpark().
406 OrderAccess::fence();
407 ParkEvent * const slp = thread->_SleepEvent ;
408 if (slp != NULL) slp->unpark() ;
409 }
410
411 // For JSR166. Unpark even if interrupt status already was set
412 if (thread->is_Java_thread())
413 ((JavaThread*)thread)->parker()->unpark();
414
415 ParkEvent * ev = thread->_ParkEvent ;
416 if (ev != NULL) ev->unpark() ;
417
418 }
419
420 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
421 assert(Thread::current() == thread || Threads_lock->owned_by_self(),
422 "possibility of dangling Thread pointer");
423
424 OSThread* osthread = thread->osthread();
425
426 bool interrupted = osthread->interrupted();
427
428 // NOTE that since there is no "lock" around the interrupt and
429 // is_interrupted operations, there is the possibility that the
430 // interrupted flag (in osThread) will be "false" but that the
431 // low-level events will be in the signaled state. This is
432 // intentional. The effect of this is that Object.wait() and
433 // LockSupport.park() will appear to have a spurious wakeup, which
434 // is allowed and not harmful, and the possibility is so rare that
435 // it is not worth the added complexity to add yet another lock.
436 // For the sleep event an explicit reset is performed on entry
437 // to os::sleep, so there is no early return. It has also been
438 // recommended not to put the interrupted flag into the "event"
439 // structure because it hides the issue.
440 if (interrupted && clear_interrupted) {
441 osthread->set_interrupted(false);
442 // consider thread->_SleepEvent->reset() ... optional optimization
443 }
444
445 return interrupted;
446 }
447
448 // Returned string is a constant. For unknown signals "UNKNOWN" is returned.
449 const char* os::Posix::get_signal_name(int sig, char* out, size_t outlen) {
450
451 static const struct {
452 int sig; const char* name;
453 }
454 info[] =
455 {
456 { SIGABRT, "SIGABRT" },
457 #ifdef SIGAIO
458 { SIGAIO, "SIGAIO" },
459 #endif
460 { SIGALRM, "SIGALRM" },
461 #ifdef SIGALRM1
462 { SIGALRM1, "SIGALRM1" },
463 #endif
464 { SIGBUS, "SIGBUS" },
465 #ifdef SIGCANCEL
466 { SIGCANCEL, "SIGCANCEL" },
467 #endif
468 { SIGCHLD, "SIGCHLD" },
469 #ifdef SIGCLD
470 { SIGCLD, "SIGCLD" },
471 #endif
472 { SIGCONT, "SIGCONT" },
473 #ifdef SIGCPUFAIL
474 { SIGCPUFAIL, "SIGCPUFAIL" },
475 #endif
476 #ifdef SIGDANGER
477 { SIGDANGER, "SIGDANGER" },
478 #endif
479 #ifdef SIGDIL
480 { SIGDIL, "SIGDIL" },
481 #endif
482 #ifdef SIGEMT
483 { SIGEMT, "SIGEMT" },
484 #endif
485 { SIGFPE, "SIGFPE" },
486 #ifdef SIGFREEZE
487 { SIGFREEZE, "SIGFREEZE" },
488 #endif
489 #ifdef SIGGFAULT
490 { SIGGFAULT, "SIGGFAULT" },
491 #endif
492 #ifdef SIGGRANT
493 { SIGGRANT, "SIGGRANT" },
494 #endif
495 { SIGHUP, "SIGHUP" },
496 { SIGILL, "SIGILL" },
497 { SIGINT, "SIGINT" },
498 #ifdef SIGIO
499 { SIGIO, "SIGIO" },
500 #endif
501 #ifdef SIGIOINT
502 { SIGIOINT, "SIGIOINT" },
503 #endif
504 #ifdef SIGIOT
505 // SIGIOT is there for BSD compatibility, but on most Unices just a
506 // synonym for SIGABRT. The result should be "SIGABRT", not
507 // "SIGIOT".
508 #if (SIGIOT != SIGABRT )
509 { SIGIOT, "SIGIOT" },
510 #endif
511 #endif
512 #ifdef SIGKAP
513 { SIGKAP, "SIGKAP" },
514 #endif
515 { SIGKILL, "SIGKILL" },
516 #ifdef SIGLOST
517 { SIGLOST, "SIGLOST" },
518 #endif
519 #ifdef SIGLWP
520 { SIGLWP, "SIGLWP" },
521 #endif
522 #ifdef SIGLWPTIMER
523 { SIGLWPTIMER, "SIGLWPTIMER" },
524 #endif
525 #ifdef SIGMIGRATE
526 { SIGMIGRATE, "SIGMIGRATE" },
527 #endif
528 #ifdef SIGMSG
529 { SIGMSG, "SIGMSG" },
530 #endif
531 { SIGPIPE, "SIGPIPE" },
532 #ifdef SIGPOLL
533 { SIGPOLL, "SIGPOLL" },
534 #endif
535 #ifdef SIGPRE
536 { SIGPRE, "SIGPRE" },
537 #endif
538 { SIGPROF, "SIGPROF" },
539 #ifdef SIGPTY
540 { SIGPTY, "SIGPTY" },
541 #endif
542 #ifdef SIGPWR
543 { SIGPWR, "SIGPWR" },
544 #endif
545 { SIGQUIT, "SIGQUIT" },
546 #ifdef SIGRECONFIG
547 { SIGRECONFIG, "SIGRECONFIG" },
548 #endif
549 #ifdef SIGRECOVERY
550 { SIGRECOVERY, "SIGRECOVERY" },
551 #endif
552 #ifdef SIGRESERVE
553 { SIGRESERVE, "SIGRESERVE" },
554 #endif
555 #ifdef SIGRETRACT
556 { SIGRETRACT, "SIGRETRACT" },
557 #endif
558 #ifdef SIGSAK
559 { SIGSAK, "SIGSAK" },
560 #endif
561 { SIGSEGV, "SIGSEGV" },
562 #ifdef SIGSOUND
563 { SIGSOUND, "SIGSOUND" },
564 #endif
565 { SIGSTOP, "SIGSTOP" },
566 { SIGSYS, "SIGSYS" },
567 #ifdef SIGSYSERROR
568 { SIGSYSERROR, "SIGSYSERROR" },
569 #endif
570 #ifdef SIGTALRM
571 { SIGTALRM, "SIGTALRM" },
572 #endif
573 { SIGTERM, "SIGTERM" },
574 #ifdef SIGTHAW
575 { SIGTHAW, "SIGTHAW" },
576 #endif
577 { SIGTRAP, "SIGTRAP" },
578 #ifdef SIGTSTP
579 { SIGTSTP, "SIGTSTP" },
580 #endif
581 { SIGTTIN, "SIGTTIN" },
582 { SIGTTOU, "SIGTTOU" },
583 #ifdef SIGURG
584 { SIGURG, "SIGURG" },
585 #endif
586 { SIGUSR1, "SIGUSR1" },
587 { SIGUSR2, "SIGUSR2" },
588 #ifdef SIGVIRT
589 { SIGVIRT, "SIGVIRT" },
590 #endif
591 { SIGVTALRM, "SIGVTALRM" },
592 #ifdef SIGWAITING
593 { SIGWAITING, "SIGWAITING" },
594 #endif
595 #ifdef SIGWINCH
596 { SIGWINCH, "SIGWINCH" },
597 #endif
598 #ifdef SIGWINDOW
599 { SIGWINDOW, "SIGWINDOW" },
600 #endif
601 { SIGXCPU, "SIGXCPU" },
602 { SIGXFSZ, "SIGXFSZ" },
603 #ifdef SIGXRES
604 { SIGXRES, "SIGXRES" },
605 #endif
606 { -1, NULL }
607 };
608
609 const char* ret = NULL;
610
611 #ifdef SIGRTMIN
612 if (sig >= SIGRTMIN && sig <= SIGRTMAX) {
613 if (sig == SIGRTMIN) {
614 ret = "SIGRTMIN";
615 } else if (sig == SIGRTMAX) {
616 ret = "SIGRTMAX";
617 } else {
618 jio_snprintf(out, outlen, "SIGRTMIN+%d", sig - SIGRTMIN);
619 return out;
620 }
621 }
622 #endif
623
624 if (sig > 0) {
625 for (int idx = 0; info[idx].sig != -1; idx ++) {
626 if (info[idx].sig == sig) {
627 ret = info[idx].name;
628 break;
629 }
630 }
631 }
632
633 if (!ret) {
634 if (!is_valid_signal(sig)) {
635 ret = "INVALID";
636 } else {
637 ret = "UNKNOWN";
638 }
639 }
640
641 jio_snprintf(out, outlen, ret);
642 return out;
643 }
644
645 // Returns true if signal number is valid.
646 bool os::Posix::is_valid_signal(int sig) {
647 // MacOS not really POSIX compliant: sigaddset does not return
648 // an error for invalid signal numbers. However, MacOS does not
649 // support real time signals and simply seems to have just 33
650 // signals with no holes in the signal range.
651 #ifdef __APPLE__
652 return sig >= 1 && sig < NSIG;
653 #else
654 // Use sigaddset to check for signal validity.
655 sigset_t set;
656 if (sigaddset(&set, sig) == -1 && errno == EINVAL) {
657 return false;
658 }
659 return true;
660 #endif
661 }
662
663 #define NUM_IMPORTANT_SIGS 32
664 // Returns one-line short description of a signal set in a user provided buffer.
665 const char* os::Posix::describe_signal_set_short(const sigset_t* set, char* buffer, size_t buf_size) {
666 assert(buf_size == (NUM_IMPORTANT_SIGS + 1), "wrong buffer size");
667 // Note: for shortness, just print out the first 32. That should
668 // cover most of the useful ones, apart from realtime signals.
669 for (int sig = 1; sig <= NUM_IMPORTANT_SIGS; sig++) {
670 const int rc = sigismember(set, sig);
671 if (rc == -1 && errno == EINVAL) {
672 buffer[sig-1] = '?';
673 } else {
674 buffer[sig-1] = rc == 0 ? '0' : '1';
675 }
676 }
677 buffer[NUM_IMPORTANT_SIGS] = 0;
678 return buffer;
679 }
680
681 // Prints one-line description of a signal set.
682 void os::Posix::print_signal_set_short(outputStream* st, const sigset_t* set) {
683 char buf[NUM_IMPORTANT_SIGS + 1];
684 os::Posix::describe_signal_set_short(set, buf, sizeof(buf));
685 st->print(buf);
686 }
687
688 // Writes one-line description of a combination of sigaction.sa_flags into a user
689 // provided buffer. Returns that buffer.
690 const char* os::Posix::describe_sa_flags(int flags, char* buffer, size_t size) {
691 char* p = buffer;
692 size_t remaining = size;
693 bool first = true;
694 int idx = 0;
695
696 assert(buffer, "invalid argument");
697
698 if (size == 0) {
699 return buffer;
700 }
701
702 strncpy(buffer, "none", size);
703
704 const struct {
705 int i;
706 const char* s;
707 } flaginfo [] = {
708 { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
709 { SA_ONSTACK, "SA_ONSTACK" },
710 { SA_RESETHAND, "SA_RESETHAND" },
711 { SA_RESTART, "SA_RESTART" },
712 { SA_SIGINFO, "SA_SIGINFO" },
713 { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
714 { SA_NODEFER, "SA_NODEFER" },
715 #ifdef AIX
716 { SA_ONSTACK, "SA_ONSTACK" },
717 { SA_OLDSTYLE, "SA_OLDSTYLE" },
718 #endif
719 { 0, NULL }
720 };
721
722 for (idx = 0; flaginfo[idx].s && remaining > 1; idx++) {
723 if (flags & flaginfo[idx].i) {
724 if (first) {
725 jio_snprintf(p, remaining, "%s", flaginfo[idx].s);
726 first = false;
727 } else {
728 jio_snprintf(p, remaining, "|%s", flaginfo[idx].s);
729 }
730 const size_t len = strlen(p);
731 p += len;
732 remaining -= len;
733 }
734 }
735
736 buffer[size - 1] = '\0';
737
738 return buffer;
739 }
740
741 // Prints one-line description of a combination of sigaction.sa_flags.
742 void os::Posix::print_sa_flags(outputStream* st, int flags) {
743 char buffer[0x100];
744 os::Posix::describe_sa_flags(flags, buffer, sizeof(buffer));
745 st->print(buffer);
746 }
747
748 // Helper function for os::Posix::print_siginfo_...():
749 // return a textual description for signal code.
750 struct enum_sigcode_desc_t {
751 const char* s_name;
752 const char* s_desc;
753 };
754
755 static bool get_signal_code_description(const siginfo_t* si, enum_sigcode_desc_t* out) {
756
757 const struct {
758 int sig; int code; const char* s_code; const char* s_desc;
759 } t1 [] = {
760 { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode." },
761 { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand." },
762 { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode." },
763 { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap." },
764 { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode." },
765 { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register." },
766 { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error." },
767 { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error." },
768 #if defined(IA64) && defined(LINUX)
769 { SIGILL, ILL_BADIADDR, "ILL_BADIADDR", "Unimplemented instruction address" },
770 { SIGILL, ILL_BREAK, "ILL_BREAK", "Application Break instruction" },
771 #endif
772 { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero." },
773 { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow." },
774 { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating-point divide by zero." },
775 { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating-point overflow." },
776 { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating-point underflow." },
777 { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating-point inexact result." },
778 { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating-point operation." },
779 { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range." },
780 { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object." },
781 { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for mapped object." },
782 #ifdef AIX
783 // no explanation found what keyerr would be
784 { SIGSEGV, SEGV_KEYERR, "SEGV_KEYERR", "key error" },
785 #endif
786 #if defined(IA64) && !defined(AIX)
787 { SIGSEGV, SEGV_PSTKOVF, "SEGV_PSTKOVF", "Paragraph stack overflow" },
788 #endif
789 { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment." },
790 { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Nonexistent physical address." },
791 { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object-specific hardware error." },
792 { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint." },
793 { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap." },
794 { SIGCHLD, CLD_EXITED, "CLD_EXITED", "Child has exited." },
795 { SIGCHLD, CLD_KILLED, "CLD_KILLED", "Child has terminated abnormally and did not create a core file." },
796 { SIGCHLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally and created a core file." },
797 { SIGCHLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped." },
798 { SIGCHLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped." },
799 { SIGCHLD, CLD_CONTINUED,"CLD_CONTINUED","Stopped child has continued." },
800 #ifdef SIGPOLL
801 { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available." },
802 { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available." },
803 { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error." },
804 { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available." },
805 { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected. [Option End]" },
806 #endif
807 { -1, -1, NULL, NULL }
808 };
809
810 // Codes valid in any signal context.
811 const struct {
812 int code; const char* s_code; const char* s_desc;
813 } t2 [] = {
814 { SI_USER, "SI_USER", "Signal sent by kill()." },
815 { SI_QUEUE, "SI_QUEUE", "Signal sent by the sigqueue()." },
816 { SI_TIMER, "SI_TIMER", "Signal generated by expiration of a timer set by timer_settime()." },
817 { SI_ASYNCIO, "SI_ASYNCIO", "Signal generated by completion of an asynchronous I/O request." },
818 { SI_MESGQ, "SI_MESGQ", "Signal generated by arrival of a message on an empty message queue." },
819 // Linux specific
820 #ifdef SI_TKILL
821 { SI_TKILL, "SI_TKILL", "Signal sent by tkill (pthread_kill)" },
822 #endif
823 #ifdef SI_DETHREAD
824 { SI_DETHREAD, "SI_DETHREAD", "Signal sent by execve() killing subsidiary threads" },
825 #endif
826 #ifdef SI_KERNEL
827 { SI_KERNEL, "SI_KERNEL", "Signal sent by kernel." },
828 #endif
829 #ifdef SI_SIGIO
830 { SI_SIGIO, "SI_SIGIO", "Signal sent by queued SIGIO" },
831 #endif
832
833 #ifdef AIX
834 { SI_UNDEFINED, "SI_UNDEFINED","siginfo contains partial information" },
835 { SI_EMPTY, "SI_EMPTY", "siginfo contains no useful information" },
836 #endif
837
838 #ifdef __sun
839 { SI_NOINFO, "SI_NOINFO", "No signal information" },
840 { SI_RCTL, "SI_RCTL", "kernel generated signal via rctl action" },
841 { SI_LWP, "SI_LWP", "Signal sent via lwp_kill" },
842 #endif
843
844 { -1, NULL, NULL }
845 };
846
847 const char* s_code = NULL;
848 const char* s_desc = NULL;
849
850 for (int i = 0; t1[i].sig != -1; i ++) {
851 if (t1[i].sig == si->si_signo && t1[i].code == si->si_code) {
852 s_code = t1[i].s_code;
853 s_desc = t1[i].s_desc;
854 break;
855 }
856 }
857
858 if (s_code == NULL) {
859 for (int i = 0; t2[i].s_code != NULL; i ++) {
860 if (t2[i].code == si->si_code) {
861 s_code = t2[i].s_code;
862 s_desc = t2[i].s_desc;
863 }
864 }
865 }
866
867 if (s_code == NULL) {
868 out->s_name = "unknown";
869 out->s_desc = "unknown";
870 return false;
871 }
872
873 out->s_name = s_code;
874 out->s_desc = s_desc;
875
876 return true;
877 }
878
879 // A POSIX conform, platform-independend siginfo print routine.
880 // Short print out on one line.
881 void os::Posix::print_siginfo_brief(outputStream* os, const siginfo_t* si) {
882 char buf[20];
883 os->print("siginfo: ");
884
885 if (!si) {
886 os->print("<null>");
887 return;
888 }
889
890 // See print_siginfo_full() for details.
891 const int sig = si->si_signo;
892
893 os->print("si_signo: %d (%s)", sig, os::Posix::get_signal_name(sig, buf, sizeof(buf)));
894
895 enum_sigcode_desc_t ed;
896 if (get_signal_code_description(si, &ed)) {
897 os->print(", si_code: %d (%s)", si->si_code, ed.s_name);
898 } else {
899 os->print(", si_code: %d (unknown)", si->si_code);
900 }
901
902 if (si->si_errno) {
903 os->print(", si_errno: %d", si->si_errno);
904 }
905
906 const int me = (int) ::getpid();
907 const int pid = (int) si->si_pid;
908
909 if (si->si_code == SI_USER || si->si_code == SI_QUEUE) {
910 if (IS_VALID_PID(pid) && pid != me) {
911 os->print(", sent from pid: %d (uid: %d)", pid, (int) si->si_uid);
912 }
913 } else if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL ||
914 sig == SIGTRAP || sig == SIGFPE) {
915 os->print(", si_addr: " PTR_FORMAT, si->si_addr);
916 #ifdef SIGPOLL
917 } else if (sig == SIGPOLL) {
918 os->print(", si_band: " PTR64_FORMAT, (uint64_t)si->si_band);
919 #endif
920 } else if (sig == SIGCHLD) {
921 os->print_cr(", si_pid: %d, si_uid: %d, si_status: %d", (int) si->si_pid, si->si_uid, si->si_status);
922 }
923 }
924
925 os::WatcherThreadCrashProtection::WatcherThreadCrashProtection() { 314 os::WatcherThreadCrashProtection::WatcherThreadCrashProtection() {
926 assert(Thread::current()->is_Watcher_thread(), "Must be WatcherThread"); 315 assert(Thread::current()->is_Watcher_thread(), "Must be WatcherThread");
927 } 316 }
928 317
929 /* 318 /*