Wed, 27 Feb 2008 13:55:58 -0500
6549844: Wording problems in "An unexpected error ..."
Summary: Changed wording to "A fatal error.." also don't claim it's not VM bug if in hotspot compilers (Java thread in native).
Reviewed-by: jjh, sbohne, jrose, never
1 /*
2 * Copyright 2003-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 # include "incls/_precompiled.incl"
26 # include "incls/_vmError.cpp.incl"
28 // List of environment variables that should be reported in error log file.
29 const char *env_list[] = {
30 // All platforms
31 "JAVA_HOME", "JRE_HOME", "JAVA_TOOL_OPTIONS", "_JAVA_OPTIONS", "CLASSPATH",
32 "JAVA_COMPILER", "PATH", "USERNAME",
34 // Env variables that are defined on Solaris/Linux
35 "LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY",
36 "HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE",
38 // defined on Linux
39 "LD_ASSUME_KERNEL", "_JAVA_SR_SIGNUM",
41 // defined on Windows
42 "OS", "PROCESSOR_IDENTIFIER", "_ALT_JAVA_HOME_DIR",
44 (const char *)0
45 };
47 // Fatal error handler for internal errors and crashes.
48 //
49 // The default behavior of fatal error handler is to print a brief message
50 // to standard out (defaultStream::output_fd()), then save detailed information
51 // into an error report file (hs_err_pid<pid>.log) and abort VM. If multiple
52 // threads are having troubles at the same time, only one error is reported.
53 // The thread that is reporting error will abort VM when it is done, all other
54 // threads are blocked forever inside report_and_die().
56 // Constructor for crashes
57 VMError::VMError(Thread* thread, int sig, address pc, void* siginfo, void* context) {
58 _thread = thread;
59 _id = sig;
60 _pc = pc;
61 _siginfo = siginfo;
62 _context = context;
64 _verbose = false;
65 _current_step = 0;
66 _current_step_info = NULL;
68 _message = "";
69 _filename = NULL;
70 _lineno = 0;
72 _size = 0;
73 }
75 // Constructor for internal errors
76 VMError::VMError(Thread* thread, const char* message, const char* filename, int lineno) {
77 _thread = thread;
78 _id = internal_error; // set it to a value that's not an OS exception/signal
79 _filename = filename;
80 _lineno = lineno;
81 _message = message;
83 _verbose = false;
84 _current_step = 0;
85 _current_step_info = NULL;
87 _pc = NULL;
88 _siginfo = NULL;
89 _context = NULL;
91 _size = 0;
92 }
94 // Constructor for OOM errors
95 VMError::VMError(Thread* thread, size_t size, const char* message, const char* filename, int lineno) {
96 _thread = thread;
97 _id = oom_error; // set it to a value that's not an OS exception/signal
98 _filename = filename;
99 _lineno = lineno;
100 _message = message;
102 _verbose = false;
103 _current_step = 0;
104 _current_step_info = NULL;
106 _pc = NULL;
107 _siginfo = NULL;
108 _context = NULL;
110 _size = size;
111 }
114 // Constructor for non-fatal errors
115 VMError::VMError(const char* message) {
116 _thread = NULL;
117 _id = internal_error; // set it to a value that's not an OS exception/signal
118 _filename = NULL;
119 _lineno = 0;
120 _message = message;
122 _verbose = false;
123 _current_step = 0;
124 _current_step_info = NULL;
126 _pc = NULL;
127 _siginfo = NULL;
128 _context = NULL;
130 _size = 0;
131 }
133 // -XX:OnError=<string>, where <string> can be a list of commands, separated
134 // by ';'. "%p" is replaced by current process id (pid); "%%" is replaced by
135 // a single "%". Some examples:
136 //
137 // -XX:OnError="pmap %p" // show memory map
138 // -XX:OnError="gcore %p; dbx - %p" // dump core and launch debugger
139 // -XX:OnError="cat hs_err_pid%p.log | mail my_email@sun.com"
140 // -XX:OnError="kill -9 %p" // ?#!@#
142 // A simple parser for -XX:OnError, usage:
143 // ptr = OnError;
144 // while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr) != NULL)
145 // ... ...
146 static char* next_OnError_command(char* buf, int buflen, const char** ptr) {
147 if (ptr == NULL || *ptr == NULL) return NULL;
149 const char* cmd = *ptr;
151 // skip leading blanks or ';'
152 while (*cmd == ' ' || *cmd == ';') cmd++;
154 if (*cmd == '\0') return NULL;
156 const char * cmdend = cmd;
157 while (*cmdend != '\0' && *cmdend != ';') cmdend++;
159 Arguments::copy_expand_pid(cmd, cmdend - cmd, buf, buflen);
161 *ptr = (*cmdend == '\0' ? cmdend : cmdend + 1);
162 return buf;
163 }
166 static void print_bug_submit_message(outputStream *out, Thread *thread) {
167 if (out == NULL) return;
168 out->print_raw_cr("# If you would like to submit a bug report, please visit:");
169 out->print_raw ("# ");
170 out->print_raw_cr(Arguments::java_vendor_url_bug());
171 // If the crash is in native code, encourage user to submit a bug to the
172 // provider of that code.
173 if (thread && thread->is_Java_thread() &&
174 !thread->is_hidden_from_external_view()) {
175 JavaThread* jt = (JavaThread*)thread;
176 if (jt->thread_state() == _thread_in_native) {
177 out->print_cr("# The crash happened outside the Java Virtual Machine in native code.\n# See problematic frame for where to report the bug.");
178 }
179 }
180 out->print_raw_cr("#");
181 }
184 // Return a string to describe the error
185 char* VMError::error_string(char* buf, int buflen) {
186 char signame_buf[64];
187 const char *signame = os::exception_name(_id, signame_buf, sizeof(signame_buf));
189 if (signame) {
190 jio_snprintf(buf, buflen,
191 "%s (0x%x) at pc=" PTR_FORMAT ", pid=%d, tid=" UINTX_FORMAT,
192 signame, _id, _pc,
193 os::current_process_id(), os::current_thread_id());
194 } else {
195 if (_filename != NULL && _lineno > 0) {
196 // skip directory names
197 char separator = os::file_separator()[0];
198 const char *p = strrchr(_filename, separator);
200 jio_snprintf(buf, buflen,
201 "Internal Error at %s:%d, pid=%d, tid=" UINTX_FORMAT " \nError: %s",
202 p ? p + 1 : _filename, _lineno,
203 os::current_process_id(), os::current_thread_id(),
204 _message ? _message : "");
205 } else {
206 jio_snprintf(buf, buflen,
207 "Internal Error (0x%x), pid=%d, tid=" UINTX_FORMAT,
208 _id, os::current_process_id(), os::current_thread_id());
209 }
210 }
212 return buf;
213 }
216 // This is the main function to report a fatal error. Only one thread can
217 // call this function, so we don't need to worry about MT-safety. But it's
218 // possible that the error handler itself may crash or die on an internal
219 // error, for example, when the stack/heap is badly damaged. We must be
220 // able to handle recursive errors that happen inside error handler.
221 //
222 // Error reporting is done in several steps. If a crash or internal error
223 // occurred when reporting an error, the nested signal/exception handler
224 // can skip steps that are already (or partially) done. Error reporting will
225 // continue from the next step. This allows us to retrieve and print
226 // information that may be unsafe to get after a fatal error. If it happens,
227 // you may find nested report_and_die() frames when you look at the stack
228 // in a debugger.
229 //
230 // In general, a hang in error handler is much worse than a crash or internal
231 // error, as it's harder to recover from a hang. Deadlock can happen if we
232 // try to grab a lock that is already owned by current thread, or if the
233 // owner is blocked forever (e.g. in os::infinite_sleep()). If possible, the
234 // error handler and all the functions it called should avoid grabbing any
235 // lock. An important thing to notice is that memory allocation needs a lock.
236 //
237 // We should avoid using large stack allocated buffers. Many errors happen
238 // when stack space is already low. Making things even worse is that there
239 // could be nested report_and_die() calls on stack (see above). Only one
240 // thread can report error, so large buffers are statically allocated in data
241 // segment.
243 void VMError::report(outputStream* st) {
244 # define BEGIN if (_current_step == 0) { _current_step = 1;
245 # define STEP(n, s) } if (_current_step < n) { _current_step = n; _current_step_info = s;
246 # define END }
248 // don't allocate large buffer on stack
249 static char buf[O_BUFLEN];
251 BEGIN
253 STEP(10, "(printing fatal error message)")
255 st->print_cr("#");
256 st->print_cr("# A fatal error has been detected by the Java Runtime Environment:");
258 STEP(15, "(printing type of error)")
260 switch(_id) {
261 case oom_error:
262 st->print_cr("#");
263 st->print("# java.lang.OutOfMemoryError: ");
264 if (_size) {
265 st->print("requested ");
266 sprintf(buf,"%d",_size);
267 st->print(buf);
268 st->print(" bytes");
269 if (_message != NULL) {
270 st->print(" for ");
271 st->print(_message);
272 }
273 st->print_cr(". Out of swap space?");
274 } else {
275 if (_message != NULL)
276 st->print_cr(_message);
277 }
278 break;
279 case internal_error:
280 default:
281 break;
282 }
284 STEP(20, "(printing exception/signal name)")
286 st->print_cr("#");
287 st->print("# ");
288 // Is it an OS exception/signal?
289 if (os::exception_name(_id, buf, sizeof(buf))) {
290 st->print("%s", buf);
291 st->print(" (0x%x)", _id); // signal number
292 st->print(" at pc=" PTR_FORMAT, _pc);
293 } else {
294 st->print("Internal Error");
295 if (_filename != NULL && _lineno > 0) {
296 #ifdef PRODUCT
297 // In product mode chop off pathname?
298 char separator = os::file_separator()[0];
299 const char *p = strrchr(_filename, separator);
300 const char *file = p ? p+1 : _filename;
301 #else
302 const char *file = _filename;
303 #endif
304 size_t len = strlen(file);
305 size_t buflen = sizeof(buf);
307 strncpy(buf, file, buflen);
308 if (len + 10 < buflen) {
309 sprintf(buf + len, ":" SIZE_FORMAT, _lineno);
310 }
311 st->print(" (%s)", buf);
312 } else {
313 st->print(" (0x%x)", _id);
314 }
315 }
317 STEP(30, "(printing current thread and pid)")
319 // process id, thread id
320 st->print(", pid=%d", os::current_process_id());
321 st->print(", tid=" UINTX_FORMAT, os::current_thread_id());
322 st->cr();
324 STEP(40, "(printing error message)")
326 // error message
327 if (_message && _message[0] != '\0') {
328 st->print_cr("# Error: %s", _message);
329 }
331 STEP(50, "(printing Java version string)")
333 // VM version
334 st->print_cr("#");
335 st->print_cr("# Java VM: %s (%s %s %s)",
336 Abstract_VM_Version::vm_name(),
337 Abstract_VM_Version::vm_release(),
338 Abstract_VM_Version::vm_info_string(),
339 Abstract_VM_Version::vm_platform_string()
340 );
342 STEP(60, "(printing problematic frame)")
344 // Print current frame if we have a context (i.e. it's a crash)
345 if (_context) {
346 st->print_cr("# Problematic frame:");
347 st->print("# ");
348 frame fr = os::fetch_frame_from_context(_context);
349 fr.print_on_error(st, buf, sizeof(buf));
350 st->cr();
351 st->print_cr("#");
352 }
354 STEP(65, "(printing bug submit message)")
356 if (_verbose) print_bug_submit_message(st, _thread);
358 STEP(70, "(printing thread)" )
360 if (_verbose) {
361 st->cr();
362 st->print_cr("--------------- T H R E A D ---------------");
363 st->cr();
364 }
366 STEP(80, "(printing current thread)" )
368 // current thread
369 if (_verbose) {
370 if (_thread) {
371 st->print("Current thread (" PTR_FORMAT "): ", _thread);
372 _thread->print_on_error(st, buf, sizeof(buf));
373 st->cr();
374 } else {
375 st->print_cr("Current thread is native thread");
376 }
377 st->cr();
378 }
380 STEP(90, "(printing siginfo)" )
382 // signal no, signal code, address that caused the fault
383 if (_verbose && _siginfo) {
384 os::print_siginfo(st, _siginfo);
385 st->cr();
386 }
388 STEP(100, "(printing registers, top of stack, instructions near pc)")
390 // registers, top of stack, instructions near pc
391 if (_verbose && _context) {
392 os::print_context(st, _context);
393 st->cr();
394 }
396 STEP(110, "(printing stack bounds)" )
398 if (_verbose) {
399 st->print("Stack: ");
401 address stack_top;
402 size_t stack_size;
404 if (_thread) {
405 stack_top = _thread->stack_base();
406 stack_size = _thread->stack_size();
407 } else {
408 stack_top = os::current_stack_base();
409 stack_size = os::current_stack_size();
410 }
412 address stack_bottom = stack_top - stack_size;
413 st->print("[" PTR_FORMAT "," PTR_FORMAT "]", stack_bottom, stack_top);
415 frame fr = _context ? os::fetch_frame_from_context(_context)
416 : os::current_frame();
418 if (fr.sp()) {
419 st->print(", sp=" PTR_FORMAT, fr.sp());
420 st->print(", free space=%dk",
421 ((intptr_t)fr.sp() - (intptr_t)stack_bottom) >> 10);
422 }
424 st->cr();
425 }
427 STEP(120, "(printing native stack)" )
429 if (_verbose) {
430 frame fr = _context ? os::fetch_frame_from_context(_context)
431 : os::current_frame();
433 // see if it's a valid frame
434 if (fr.pc()) {
435 st->print_cr("Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)");
437 int count = 0;
439 while (count++ < StackPrintLimit) {
440 fr.print_on_error(st, buf, sizeof(buf));
441 st->cr();
442 if (os::is_first_C_frame(&fr)) break;
443 fr = os::get_sender_for_C_frame(&fr);
444 }
446 if (count > StackPrintLimit) {
447 st->print_cr("...<more frames>...");
448 }
450 st->cr();
451 }
452 }
454 STEP(130, "(printing Java stack)" )
456 if (_verbose && _thread && _thread->is_Java_thread()) {
457 JavaThread* jt = (JavaThread*)_thread;
458 if (jt->has_last_Java_frame()) {
459 st->print_cr("Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)");
460 for(StackFrameStream sfs(jt); !sfs.is_done(); sfs.next()) {
461 sfs.current()->print_on_error(st, buf, sizeof(buf));
462 st->cr();
463 }
464 }
465 }
467 STEP(140, "(printing VM operation)" )
469 if (_verbose && _thread && _thread->is_VM_thread()) {
470 VMThread* t = (VMThread*)_thread;
471 VM_Operation* op = t->vm_operation();
472 if (op) {
473 op->print_on_error(st);
474 st->cr();
475 st->cr();
476 }
477 }
479 STEP(150, "(printing current compile task)" )
481 if (_verbose && _thread && _thread->is_Compiler_thread()) {
482 CompilerThread* t = (CompilerThread*)_thread;
483 if (t->task()) {
484 st->cr();
485 st->print_cr("Current CompileTask:");
486 t->task()->print_line_on_error(st, buf, sizeof(buf));
487 st->cr();
488 }
489 }
491 STEP(160, "(printing process)" )
493 if (_verbose) {
494 st->cr();
495 st->print_cr("--------------- P R O C E S S ---------------");
496 st->cr();
497 }
499 STEP(170, "(printing all threads)" )
501 // all threads
502 if (_verbose && _thread) {
503 Threads::print_on_error(st, _thread, buf, sizeof(buf));
504 st->cr();
505 }
507 STEP(175, "(printing VM state)" )
509 if (_verbose) {
510 // Safepoint state
511 st->print("VM state:");
513 if (SafepointSynchronize::is_synchronizing()) st->print("synchronizing");
514 else if (SafepointSynchronize::is_at_safepoint()) st->print("at safepoint");
515 else st->print("not at safepoint");
517 // Also see if error occurred during initialization or shutdown
518 if (!Universe::is_fully_initialized()) {
519 st->print(" (not fully initialized)");
520 } else if (VM_Exit::vm_exited()) {
521 st->print(" (shutting down)");
522 } else {
523 st->print(" (normal execution)");
524 }
525 st->cr();
526 st->cr();
527 }
529 STEP(180, "(printing owned locks on error)" )
531 // mutexes/monitors that currently have an owner
532 if (_verbose) {
533 print_owned_locks_on_error(st);
534 st->cr();
535 }
537 STEP(190, "(printing heap information)" )
539 if (_verbose && Universe::is_fully_initialized()) {
540 // print heap information before vm abort
541 Universe::print_on(st);
542 st->cr();
543 }
545 STEP(200, "(printing dynamic libraries)" )
547 if (_verbose) {
548 // dynamic libraries, or memory map
549 os::print_dll_info(st);
550 st->cr();
551 }
553 STEP(210, "(printing VM options)" )
555 if (_verbose) {
556 // VM options
557 Arguments::print_on(st);
558 st->cr();
559 }
561 STEP(220, "(printing environment variables)" )
563 if (_verbose) {
564 os::print_environment_variables(st, env_list, buf, sizeof(buf));
565 st->cr();
566 }
568 STEP(225, "(printing signal handlers)" )
570 if (_verbose) {
571 os::print_signal_handlers(st, buf, sizeof(buf));
572 st->cr();
573 }
575 STEP(230, "" )
577 if (_verbose) {
578 st->cr();
579 st->print_cr("--------------- S Y S T E M ---------------");
580 st->cr();
581 }
583 STEP(240, "(printing OS information)" )
585 if (_verbose) {
586 os::print_os_info(st);
587 st->cr();
588 }
590 STEP(250, "(printing CPU info)" )
591 if (_verbose) {
592 os::print_cpu_info(st);
593 st->cr();
594 }
596 STEP(260, "(printing memory info)" )
598 if (_verbose) {
599 os::print_memory_info(st);
600 st->cr();
601 }
603 STEP(270, "(printing internal vm info)" )
605 if (_verbose) {
606 st->print_cr("vm_info: %s", Abstract_VM_Version::internal_vm_info_string());
607 st->cr();
608 }
610 STEP(280, "(printing date and time)" )
612 if (_verbose) {
613 os::print_date_and_time(st);
614 st->cr();
615 }
617 END
619 # undef BEGIN
620 # undef STEP
621 # undef END
622 }
625 void VMError::report_and_die() {
626 // Don't allocate large buffer on stack
627 static char buffer[O_BUFLEN];
629 // First error, and its thread id. We must be able to handle native thread,
630 // so use thread id instead of Thread* to identify thread.
631 static VMError* first_error;
632 static jlong first_error_tid;
634 // An error could happen before tty is initialized or after it has been
635 // destroyed. Here we use a very simple unbuffered fdStream for printing.
636 // Only out.print_raw() and out.print_raw_cr() should be used, as other
637 // printing methods need to allocate large buffer on stack. To format a
638 // string, use jio_snprintf() with a static buffer or use staticBufferStream.
639 static fdStream out(defaultStream::output_fd());
641 // How many errors occurred in error handler when reporting first_error.
642 static int recursive_error_count;
644 // We will first print a brief message to standard out (verbose = false),
645 // then save detailed information in log file (verbose = true).
646 static bool out_done = false; // done printing to standard out
647 static bool log_done = false; // done saving error log
648 static fdStream log; // error log
650 if (SuppressFatalErrorMessage) {
651 os::abort();
652 }
653 jlong mytid = os::current_thread_id();
654 if (first_error == NULL &&
655 Atomic::cmpxchg_ptr(this, &first_error, NULL) == NULL) {
657 // first time
658 first_error_tid = mytid;
659 set_error_reported();
661 if (ShowMessageBoxOnError) {
662 show_message_box(buffer, sizeof(buffer));
664 // User has asked JVM to abort. Reset ShowMessageBoxOnError so the
665 // WatcherThread can kill JVM if the error handler hangs.
666 ShowMessageBoxOnError = false;
667 }
669 // reset signal handlers or exception filter; make sure recursive crashes
670 // are handled properly.
671 reset_signal_handlers();
673 } else {
674 // This is not the first error, see if it happened in a different thread
675 // or in the same thread during error reporting.
676 if (first_error_tid != mytid) {
677 jio_snprintf(buffer, sizeof(buffer),
678 "[thread " INT64_FORMAT " also had an error]",
679 mytid);
680 out.print_raw_cr(buffer);
682 // error reporting is not MT-safe, block current thread
683 os::infinite_sleep();
685 } else {
686 if (recursive_error_count++ > 30) {
687 out.print_raw_cr("[Too many errors, abort]");
688 os::die();
689 }
691 jio_snprintf(buffer, sizeof(buffer),
692 "[error occurred during error reporting %s, id 0x%x]",
693 first_error ? first_error->_current_step_info : "",
694 _id);
695 if (log.is_open()) {
696 log.cr();
697 log.print_raw_cr(buffer);
698 log.cr();
699 } else {
700 out.cr();
701 out.print_raw_cr(buffer);
702 out.cr();
703 }
704 }
705 }
707 // print to screen
708 if (!out_done) {
709 first_error->_verbose = false;
711 staticBufferStream sbs(buffer, sizeof(buffer), &out);
712 first_error->report(&sbs);
714 out_done = true;
716 first_error->_current_step = 0; // reset current_step
717 first_error->_current_step_info = ""; // reset current_step string
718 }
720 // print to error log file
721 if (!log_done) {
722 first_error->_verbose = true;
724 // see if log file is already open
725 if (!log.is_open()) {
726 // open log file
727 int fd = -1;
729 if (ErrorFile != NULL) {
730 bool copy_ok =
731 Arguments::copy_expand_pid(ErrorFile, strlen(ErrorFile), buffer, sizeof(buffer));
732 if (copy_ok) {
733 fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0666);
734 }
735 }
737 if (fd == -1) {
738 const char *cwd = os::get_current_directory(buffer, sizeof(buffer));
739 size_t len = strlen(cwd);
740 // either user didn't specify, or the user's location failed,
741 // so use the default name in the current directory
742 jio_snprintf(&buffer[len], sizeof(buffer)-len, "%shs_err_pid%u.log",
743 os::file_separator(), os::current_process_id());
744 fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0666);
745 }
747 if (fd == -1) {
748 // try temp directory
749 const char * tmpdir = os::get_temp_directory();
750 jio_snprintf(buffer, sizeof(buffer), "%shs_err_pid%u.log",
751 (tmpdir ? tmpdir : ""), os::current_process_id());
752 fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0666);
753 }
755 if (fd != -1) {
756 out.print_raw("# An error report file with more information is saved as:\n# ");
757 out.print_raw_cr(buffer);
758 os::set_error_file(buffer);
760 log.set_fd(fd);
761 } else {
762 out.print_raw_cr("# Can not save log file, dump to screen..");
763 log.set_fd(defaultStream::output_fd());
764 }
765 }
767 staticBufferStream sbs(buffer, O_BUFLEN, &log);
768 first_error->report(&sbs);
769 first_error->_current_step = 0; // reset current_step
770 first_error->_current_step_info = ""; // reset current_step string
772 if (log.fd() != defaultStream::output_fd()) {
773 close(log.fd());
774 }
776 log.set_fd(-1);
777 log_done = true;
778 }
781 static bool skip_OnError = false;
782 if (!skip_OnError && OnError && OnError[0]) {
783 skip_OnError = true;
785 out.print_raw_cr("#");
786 out.print_raw ("# -XX:OnError=\"");
787 out.print_raw (OnError);
788 out.print_raw_cr("\"");
790 char* cmd;
791 const char* ptr = OnError;
792 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
793 out.print_raw ("# Executing ");
794 #if defined(LINUX)
795 out.print_raw ("/bin/sh -c ");
796 #elif defined(SOLARIS)
797 out.print_raw ("/usr/bin/sh -c ");
798 #endif
799 out.print_raw ("\"");
800 out.print_raw (cmd);
801 out.print_raw_cr("\" ...");
803 os::fork_and_exec(cmd);
804 }
806 // done with OnError
807 OnError = NULL;
808 }
810 static bool skip_bug_url = false;
811 if (!skip_bug_url) {
812 skip_bug_url = true;
814 out.print_raw_cr("#");
815 print_bug_submit_message(&out, _thread);
816 }
818 if (!UseOSErrorReporting) {
819 // os::abort() will call abort hooks, try it first.
820 static bool skip_os_abort = false;
821 if (!skip_os_abort) {
822 skip_os_abort = true;
823 os::abort();
824 }
826 // if os::abort() doesn't abort, try os::die();
827 os::die();
828 }
829 }
831 /*
832 * OnOutOfMemoryError scripts/commands executed while VM is a safepoint - this
833 * ensures utilities such as jmap can observe the process is a consistent state.
834 */
835 class VM_ReportJavaOutOfMemory : public VM_Operation {
836 private:
837 VMError *_err;
838 public:
839 VM_ReportJavaOutOfMemory(VMError *err) { _err = err; }
840 VMOp_Type type() const { return VMOp_ReportJavaOutOfMemory; }
841 void doit();
842 };
844 void VM_ReportJavaOutOfMemory::doit() {
845 // Don't allocate large buffer on stack
846 static char buffer[O_BUFLEN];
848 tty->print_cr("#");
849 tty->print_cr("# java.lang.OutOfMemoryError: %s", _err->message());
850 tty->print_cr("# -XX:OnOutOfMemoryError=\"%s\"", OnOutOfMemoryError);
852 // make heap parsability
853 Universe::heap()->ensure_parsability(false); // no need to retire TLABs
855 char* cmd;
856 const char* ptr = OnOutOfMemoryError;
857 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
858 tty->print("# Executing ");
859 #if defined(LINUX)
860 tty->print ("/bin/sh -c ");
861 #elif defined(SOLARIS)
862 tty->print ("/usr/bin/sh -c ");
863 #endif
864 tty->print_cr("\"%s\"...", cmd);
866 os::fork_and_exec(cmd);
867 }
868 }
870 void VMError::report_java_out_of_memory() {
871 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
872 MutexLocker ml(Heap_lock);
873 VM_ReportJavaOutOfMemory op(this);
874 VMThread::execute(&op);
875 }
876 }