1 /*
2 * Copyright (c) 2003, 2016, 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 #include <fcntl.h>
26 #include "precompiled.hpp"
27 #include "code/codeCache.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "gc/shared/collectedHeap.hpp"
31 #include "logging/logConfiguration.hpp"
32 #include "prims/whitebox.hpp"
33 #include "runtime/arguments.hpp"
34 #include "runtime/atomic.hpp"
35 #include "runtime/frame.inline.hpp"
36 #include "runtime/init.hpp"
37 #include "runtime/os.hpp"
38 #include "runtime/thread.inline.hpp"
39 #include "runtime/vmThread.hpp"
40 #include "runtime/vm_operations.hpp"
41 #include "services/memTracker.hpp"
42 #include "trace/traceMacros.hpp"
43 #include "utilities/debug.hpp"
44 #include "utilities/decoder.hpp"
45 #include "utilities/defaultStream.hpp"
46 #include "utilities/errorReporter.hpp"
47 #include "utilities/events.hpp"
48 #include "utilities/vmError.hpp"
49
50 // List of environment variables that should be reported in error log file.
51 const char *env_list[] = {
52 // All platforms
53 "JAVA_HOME", "JRE_HOME", "JAVA_TOOL_OPTIONS", "_JAVA_OPTIONS", "CLASSPATH",
54 "JAVA_COMPILER", "PATH", "USERNAME",
55
56 // Env variables that are defined on Solaris/Linux/BSD
57 "LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY",
58 "HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE",
59
60 // defined on Linux
61 "LD_ASSUME_KERNEL", "_JAVA_SR_SIGNUM",
62
63 // defined on Darwin
64 "DYLD_LIBRARY_PATH", "DYLD_FALLBACK_LIBRARY_PATH",
65 "DYLD_FRAMEWORK_PATH", "DYLD_FALLBACK_FRAMEWORK_PATH",
66 "DYLD_INSERT_LIBRARIES",
67
68 // defined on Windows
69 "OS", "PROCESSOR_IDENTIFIER", "_ALT_JAVA_HOME_DIR",
70
71 (const char *)0
72 };
73
74 // A simple parser for -XX:OnError, usage:
75 // ptr = OnError;
76 // while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr) != NULL)
77 // ... ...
78 static char* next_OnError_command(char* buf, int buflen, const char** ptr) {
79 if (ptr == NULL || *ptr == NULL) return NULL;
80
81 const char* cmd = *ptr;
82
83 // skip leading blanks or ';'
84 while (*cmd == ' ' || *cmd == ';') cmd++;
85
86 if (*cmd == '\0') return NULL;
87
88 const char * cmdend = cmd;
89 while (*cmdend != '\0' && *cmdend != ';') cmdend++;
90
91 Arguments::copy_expand_pid(cmd, cmdend - cmd, buf, buflen);
92
93 *ptr = (*cmdend == '\0' ? cmdend : cmdend + 1);
94 return buf;
95 }
96
97 static void print_bug_submit_message(outputStream *out, Thread *thread) {
98 if (out == NULL) return;
99 out->print_raw_cr("# If you would like to submit a bug report, please visit:");
100 out->print_raw ("# ");
101 out->print_raw_cr(Arguments::java_vendor_url_bug());
102 // If the crash is in native code, encourage user to submit a bug to the
103 // provider of that code.
104 if (thread && thread->is_Java_thread() &&
105 !thread->is_hidden_from_external_view()) {
106 JavaThread* jt = (JavaThread*)thread;
107 if (jt->thread_state() == _thread_in_native) {
108 out->print_cr("# The crash happened outside the Java Virtual Machine in native code.\n# See problematic frame for where to report the bug.");
109 }
110 }
111 out->print_raw_cr("#");
112 }
113
114 bool VMError::coredump_status;
115 char VMError::coredump_message[O_BUFLEN];
116
117 void VMError::record_coredump_status(const char* message, bool status) {
118 coredump_status = status;
119 strncpy(coredump_message, message, sizeof(coredump_message));
120 coredump_message[sizeof(coredump_message)-1] = 0;
121 }
122
123 // Return a string to describe the error
124 char* VMError::error_string(char* buf, int buflen) {
125 char signame_buf[64];
126 const char *signame = os::exception_name(_id, signame_buf, sizeof(signame_buf));
127
128 if (signame) {
129 jio_snprintf(buf, buflen,
130 "%s (0x%x) at pc=" PTR_FORMAT ", pid=%d, tid=" UINTX_FORMAT,
131 signame, _id, _pc,
132 os::current_process_id(), os::current_thread_id());
133 } else if (_filename != NULL && _lineno > 0) {
134 // skip directory names
135 char separator = os::file_separator()[0];
136 const char *p = strrchr(_filename, separator);
137 int n = jio_snprintf(buf, buflen,
138 "Internal Error at %s:%d, pid=%d, tid=" UINTX_FORMAT,
139 p ? p + 1 : _filename, _lineno,
140 os::current_process_id(), os::current_thread_id());
141 if (n >= 0 && n < buflen && _message) {
142 if (strlen(_detail_msg) > 0) {
143 jio_snprintf(buf + n, buflen - n, "%s%s: %s",
144 os::line_separator(), _message, _detail_msg);
145 } else {
146 jio_snprintf(buf + n, buflen - n, "%sError: %s",
147 os::line_separator(), _message);
148 }
149 }
150 } else {
151 jio_snprintf(buf, buflen,
152 "Internal Error (0x%x), pid=%d, tid=" UINTX_FORMAT,
153 _id, os::current_process_id(), os::current_thread_id());
154 }
155
156 return buf;
157 }
158
159 void VMError::print_stack_trace(outputStream* st, JavaThread* jt,
160 char* buf, int buflen, bool verbose) {
161 #ifdef ZERO
162 if (jt->zero_stack()->sp() && jt->top_zero_frame()) {
163 // StackFrameStream uses the frame anchor, which may not have
164 // been set up. This can be done at any time in Zero, however,
165 // so if it hasn't been set up then we just set it up now and
166 // clear it again when we're done.
167 bool has_last_Java_frame = jt->has_last_Java_frame();
168 if (!has_last_Java_frame)
169 jt->set_last_Java_frame();
170 st->print("Java frames:");
171
172 // If the top frame is a Shark frame and the frame anchor isn't
173 // set up then it's possible that the information in the frame
174 // is garbage: it could be from a previous decache, or it could
175 // simply have never been written. So we print a warning...
176 StackFrameStream sfs(jt);
177 if (!has_last_Java_frame && !sfs.is_done()) {
178 if (sfs.current()->zeroframe()->is_shark_frame()) {
179 st->print(" (TOP FRAME MAY BE JUNK)");
180 }
181 }
182 st->cr();
183
184 // Print the frames
185 for(int i = 0; !sfs.is_done(); sfs.next(), i++) {
186 sfs.current()->zero_print_on_error(i, st, buf, buflen);
187 st->cr();
188 }
189
190 // Reset the frame anchor if necessary
191 if (!has_last_Java_frame)
192 jt->reset_last_Java_frame();
193 }
194 #else
195 if (jt->has_last_Java_frame()) {
196 st->print_cr("Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)");
197 for(StackFrameStream sfs(jt); !sfs.is_done(); sfs.next()) {
198 sfs.current()->print_on_error(st, buf, buflen, verbose);
199 st->cr();
200 }
201 }
202 #endif // ZERO
203 }
204
205 static void print_oom_reasons(outputStream* st) {
206 st->print_cr("# Possible reasons:");
207 st->print_cr("# The system is out of physical RAM or swap space");
208 if (UseCompressedOops) {
209 st->print_cr("# The process is running with CompressedOops enabled, and the Java Heap may be blocking the growth of the native heap");
210 }
211 if (LogBytesPerWord == 2) {
212 st->print_cr("# In 32 bit mode, the process size limit was hit");
213 }
214 st->print_cr("# Possible solutions:");
215 st->print_cr("# Reduce memory load on the system");
216 st->print_cr("# Increase physical memory or swap space");
217 st->print_cr("# Check if swap backing store is full");
218 if (LogBytesPerWord == 2) {
219 st->print_cr("# Use 64 bit Java on a 64 bit OS");
220 }
221 st->print_cr("# Decrease Java heap size (-Xmx/-Xms)");
222 st->print_cr("# Decrease number of Java threads");
223 st->print_cr("# Decrease Java thread stack sizes (-Xss)");
224 st->print_cr("# Set larger code cache with -XX:ReservedCodeCacheSize=");
225 if (UseCompressedOops) {
226 switch (Universe::narrow_oop_mode()) {
227 case Universe::UnscaledNarrowOop:
228 st->print_cr("# JVM is running with Unscaled Compressed Oops mode in which the Java heap is");
229 st->print_cr("# placed in the first 4GB address space. The Java Heap base address is the");
230 st->print_cr("# maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
231 st->print_cr("# to set the Java Heap base and to place the Java Heap above 4GB virtual address.");
232 break;
233 case Universe::ZeroBasedNarrowOop:
234 st->print_cr("# JVM is running with Zero Based Compressed Oops mode in which the Java heap is");
235 st->print_cr("# placed in the first 32GB address space. The Java Heap base address is the");
236 st->print_cr("# maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
237 st->print_cr("# to set the Java Heap base and to place the Java Heap above 32GB virtual address.");
238 break;
239 }
240 }
241 st->print_cr("# This output file may be truncated or incomplete.");
242 }
243
244 static const char* gc_mode() {
245 if (UseG1GC) return "g1 gc";
246 if (UseParallelGC) return "parallel gc";
247 if (UseConcMarkSweepGC) return "concurrent mark sweep gc";
248 if (UseSerialGC) return "serial gc";
249 if (UseEpsilonGC) return "epsilon gc";
250 return "ERROR in GC mode";
251 }
252
253 static void report_vm_version(outputStream* st, char* buf, int buflen) {
254 // VM version
255 st->print_cr("#");
256 JDK_Version::current().to_string(buf, buflen);
257 const char* runtime_name = JDK_Version::runtime_name() != NULL ?
258 JDK_Version::runtime_name() : "";
259 const char* runtime_version = JDK_Version::runtime_version() != NULL ?
260 JDK_Version::runtime_version() : "";
261 const char* jdk_debug_level = Abstract_VM_Version::printable_jdk_debug_level() != NULL ?
262 Abstract_VM_Version::printable_jdk_debug_level() : "";
263
264 st->print_cr("# JRE version: %s (%s) (%sbuild %s)", runtime_name, buf,
265 jdk_debug_level, runtime_version);
266
267 // This is the long version with some default settings added
268 st->print_cr("# Java VM: %s (%s%s, %s%s%s%s%s, %s, %s)",
269 Abstract_VM_Version::vm_name(),
270 jdk_debug_level,
271 Abstract_VM_Version::vm_release(),
272 Abstract_VM_Version::vm_info_string(),
273 TieredCompilation ? ", tiered" : "",
274 #if INCLUDE_JVMCI
275 EnableJVMCI ? ", jvmci" : "",
276 UseJVMCICompiler ? ", jvmci compiler" : "",
277 #else
278 "", "",
279 #endif
280 UseCompressedOops ? ", compressed oops" : "",
281 gc_mode(),
282 Abstract_VM_Version::vm_platform_string()
283 );
284 }
285
286 // This is the main function to report a fatal error. Only one thread can
287 // call this function, so we don't need to worry about MT-safety. But it's
288 // possible that the error handler itself may crash or die on an internal
289 // error, for example, when the stack/heap is badly damaged. We must be
290 // able to handle recursive errors that happen inside error handler.
291 //
292 // Error reporting is done in several steps. If a crash or internal error
293 // occurred when reporting an error, the nested signal/exception handler
294 // can skip steps that are already (or partially) done. Error reporting will
295 // continue from the next step. This allows us to retrieve and print
296 // information that may be unsafe to get after a fatal error. If it happens,
297 // you may find nested report_and_die() frames when you look at the stack
298 // in a debugger.
299 //
300 // In general, a hang in error handler is much worse than a crash or internal
301 // error, as it's harder to recover from a hang. Deadlock can happen if we
302 // try to grab a lock that is already owned by current thread, or if the
303 // owner is blocked forever (e.g. in os::infinite_sleep()). If possible, the
304 // error handler and all the functions it called should avoid grabbing any
305 // lock. An important thing to notice is that memory allocation needs a lock.
306 //
307 // We should avoid using large stack allocated buffers. Many errors happen
308 // when stack space is already low. Making things even worse is that there
309 // could be nested report_and_die() calls on stack (see above). Only one
310 // thread can report error, so large buffers are statically allocated in data
311 // segment.
312
313 int VMError::_current_step;
314 const char* VMError::_current_step_info;
315
316 void VMError::report(outputStream* st, bool _verbose) {
317
318 # define BEGIN if (_current_step == 0) { _current_step = __LINE__;
319 # define STEP(s) } if (_current_step < __LINE__) { _current_step = __LINE__; _current_step_info = s;
320 # define END }
321
322 // don't allocate large buffer on stack
323 static char buf[O_BUFLEN];
324
325 BEGIN
326
327 STEP("printing fatal error message")
328
329 st->print_cr("#");
330 if (should_report_bug(_id)) {
331 st->print_cr("# A fatal error has been detected by the Java Runtime Environment:");
332 } else {
333 st->print_cr("# There is insufficient memory for the Java "
334 "Runtime Environment to continue.");
335 }
336
337 #ifndef PRODUCT
338 // Error handler self tests
339
340 // test secondary error handling. Test it twice, to test that resetting
341 // error handler after a secondary crash works.
342 STEP("test secondary crash 1")
343 if (_verbose && TestCrashInErrorHandler != 0) {
344 st->print_cr("Will crash now (TestCrashInErrorHandler=" UINTX_FORMAT ")...",
345 TestCrashInErrorHandler);
346 controlled_crash(TestCrashInErrorHandler);
347 }
348
349 STEP("test secondary crash 2")
350 if (_verbose && TestCrashInErrorHandler != 0) {
351 st->print_cr("Will crash now (TestCrashInErrorHandler=" UINTX_FORMAT ")...",
352 TestCrashInErrorHandler);
353 controlled_crash(TestCrashInErrorHandler);
354 }
355
356 STEP("test safefetch in error handler")
357 // test whether it is safe to use SafeFetch32 in Crash Handler. Test twice
358 // to test that resetting the signal handler works correctly.
359 if (_verbose && TestSafeFetchInErrorHandler) {
360 st->print_cr("Will test SafeFetch...");
361 if (CanUseSafeFetch32()) {
362 int* const invalid_pointer = (int*) get_segfault_address();
363 const int x = 0x76543210;
364 int i1 = SafeFetch32(invalid_pointer, x);
365 int i2 = SafeFetch32(invalid_pointer, x);
366 if (i1 == x && i2 == x) {
367 st->print_cr("SafeFetch OK."); // Correctly deflected and returned default pattern
368 } else {
369 st->print_cr("??");
370 }
371 } else {
372 st->print_cr("not possible; skipped.");
373 }
374 }
375 #endif // PRODUCT
376
377 STEP("printing type of error")
378
379 switch(_id) {
380 case OOM_MALLOC_ERROR:
381 case OOM_MMAP_ERROR:
382 if (_size) {
383 st->print("# Native memory allocation ");
384 st->print((_id == (int)OOM_MALLOC_ERROR) ? "(malloc) failed to allocate " :
385 "(mmap) failed to map ");
386 jio_snprintf(buf, sizeof(buf), SIZE_FORMAT, _size);
387 st->print("%s", buf);
388 st->print(" bytes");
389 if (strlen(_detail_msg) > 0) {
390 st->print(" for ");
391 st->print("%s", _detail_msg);
392 }
393 st->cr();
394 } else {
395 if (strlen(_detail_msg) > 0) {
396 st->print("# ");
397 st->print_cr("%s", _detail_msg);
398 }
399 }
400 // In error file give some solutions
401 if (_verbose) {
402 print_oom_reasons(st);
403 } else {
404 return; // that's enough for the screen
405 }
406 break;
407 case INTERNAL_ERROR:
408 default:
409 break;
410 }
411
412 STEP("printing exception/signal name")
413
414 st->print_cr("#");
415 st->print("# ");
416 // Is it an OS exception/signal?
417 if (os::exception_name(_id, buf, sizeof(buf))) {
418 st->print("%s", buf);
419 st->print(" (0x%x)", _id); // signal number
420 st->print(" at pc=" PTR_FORMAT, p2i(_pc));
421 } else {
422 if (should_report_bug(_id)) {
423 st->print("Internal Error");
424 } else {
425 st->print("Out of Memory Error");
426 }
427 if (_filename != NULL && _lineno > 0) {
428 #ifdef PRODUCT
429 // In product mode chop off pathname?
430 char separator = os::file_separator()[0];
431 const char *p = strrchr(_filename, separator);
432 const char *file = p ? p+1 : _filename;
433 #else
434 const char *file = _filename;
435 #endif
436 st->print(" (%s:%d)", file, _lineno);
437 } else {
438 st->print(" (0x%x)", _id);
439 }
440 }
441
442 STEP("printing current thread and pid")
443
444 // process id, thread id
445 st->print(", pid=%d", os::current_process_id());
446 st->print(", tid=" UINTX_FORMAT, os::current_thread_id());
447 st->cr();
448
449 STEP("printing error message")
450
451 if (should_report_bug(_id)) { // already printed the message.
452 // error message
453 if (strlen(_detail_msg) > 0) {
454 st->print_cr("# %s: %s", _message ? _message : "Error", _detail_msg);
455 } else if (_message) {
456 st->print_cr("# Error: %s", _message);
457 }
458 }
459
460 STEP("printing Java version string")
461
462 report_vm_version(st, buf, sizeof(buf));
463
464 STEP("printing problematic frame")
465
466 // Print current frame if we have a context (i.e. it's a crash)
467 if (_context) {
468 st->print_cr("# Problematic frame:");
469 st->print("# ");
470 frame fr = os::fetch_frame_from_context(_context);
471 fr.print_on_error(st, buf, sizeof(buf));
472 st->cr();
473 st->print_cr("#");
474 }
475
476 STEP("printing core file information")
477 st->print("# ");
478 if (CreateCoredumpOnCrash) {
479 if (coredump_status) {
480 st->print("Core dump will be written. Default location: %s", coredump_message);
481 } else {
482 st->print("No core dump will be written. %s", coredump_message);
483 }
484 } else {
485 st->print("CreateCoredumpOnCrash turned off, no core file dumped");
486 }
487 st->cr();
488 st->print_cr("#");
489
490 STEP("printing bug submit message")
491
492 if (should_report_bug(_id) && _verbose) {
493 print_bug_submit_message(st, _thread);
494 }
495
496 STEP("printing summary")
497
498 if (_verbose) {
499 st->cr();
500 st->print_cr("--------------- S U M M A R Y ------------");
501 st->cr();
502 }
503
504 STEP("printing VM option summary")
505
506 if (_verbose) {
507 // VM options
508 Arguments::print_summary_on(st);
509 st->cr();
510 }
511
512 STEP("printing summary machine and OS info")
513
514 if (_verbose) {
515 os::print_summary_info(st, buf, sizeof(buf));
516 }
517
518
519 STEP("printing date and time")
520
521 if (_verbose) {
522 os::print_date_and_time(st, buf, sizeof(buf));
523 }
524
525 STEP("printing thread")
526
527 if (_verbose) {
528 st->cr();
529 st->print_cr("--------------- T H R E A D ---------------");
530 st->cr();
531 }
532
533 STEP("printing current thread")
534
535 // current thread
536 if (_verbose) {
537 if (_thread) {
538 st->print("Current thread (" PTR_FORMAT "): ", p2i(_thread));
539 _thread->print_on_error(st, buf, sizeof(buf));
540 st->cr();
541 } else {
542 st->print_cr("Current thread is native thread");
543 }
544 st->cr();
545 }
546
547 STEP("printing current compile task")
548
549 if (_verbose && _thread && _thread->is_Compiler_thread()) {
550 CompilerThread* t = (CompilerThread*)_thread;
551 if (t->task()) {
552 st->cr();
553 st->print_cr("Current CompileTask:");
554 t->task()->print_line_on_error(st, buf, sizeof(buf));
555 st->cr();
556 }
557 }
558
559
560 STEP("printing stack bounds")
561
562 if (_verbose) {
563 st->print("Stack: ");
564
565 address stack_top;
566 size_t stack_size;
567
568 if (_thread) {
569 stack_top = _thread->stack_base();
570 stack_size = _thread->stack_size();
571 } else {
572 stack_top = os::current_stack_base();
573 stack_size = os::current_stack_size();
574 }
575
576 address stack_bottom = stack_top - stack_size;
577 st->print("[" PTR_FORMAT "," PTR_FORMAT "]", p2i(stack_bottom), p2i(stack_top));
578
579 frame fr = _context ? os::fetch_frame_from_context(_context)
580 : os::current_frame();
581
582 if (fr.sp()) {
583 st->print(", sp=" PTR_FORMAT, p2i(fr.sp()));
584 size_t free_stack_size = pointer_delta(fr.sp(), stack_bottom, 1024);
585 st->print(", free space=" SIZE_FORMAT "k", free_stack_size);
586 }
587
588 st->cr();
589 }
590
591 STEP("printing native stack")
592
593 if (_verbose) {
594 if (os::platform_print_native_stack(st, _context, buf, sizeof(buf))) {
595 // We have printed the native stack in platform-specific code
596 // Windows/x64 needs special handling.
597 } else {
598 frame fr = _context ? os::fetch_frame_from_context(_context)
599 : os::current_frame();
600
601 print_native_stack(st, fr, _thread, buf, sizeof(buf));
602 }
603 }
604
605 STEP("printing Java stack")
606
607 if (_verbose && _thread && _thread->is_Java_thread()) {
608 print_stack_trace(st, (JavaThread*)_thread, buf, sizeof(buf));
609 }
610
611 STEP("printing target Java thread stack")
612
613 // printing Java thread stack trace if it is involved in GC crash
614 if (_verbose && _thread && (_thread->is_Named_thread())) {
615 JavaThread* jt = ((NamedThread *)_thread)->processed_thread();
616 if (jt != NULL) {
617 st->print_cr("JavaThread " PTR_FORMAT " (nid = %d) was being processed", p2i(jt), jt->osthread()->thread_id());
618 print_stack_trace(st, jt, buf, sizeof(buf), true);
619 }
620 }
621
622 STEP("printing siginfo")
623
624 // signal no, signal code, address that caused the fault
625 if (_verbose && _siginfo) {
626 st->cr();
627 os::print_siginfo(st, _siginfo);
628 st->cr();
629 }
630
631 STEP("CDS archive access warning")
632
633 // Print an explicit hint if we crashed on access to the CDS archive.
634 if (_verbose && _siginfo) {
635 check_failing_cds_access(st, _siginfo);
636 st->cr();
637 }
638
639 STEP("printing register info")
640
641 // decode register contents if possible
642 if (_verbose && _context && Universe::is_fully_initialized()) {
643 os::print_register_info(st, _context);
644 st->cr();
645 }
646
647 STEP("printing registers, top of stack, instructions near pc")
648
649 // registers, top of stack, instructions near pc
650 if (_verbose && _context) {
651 os::print_context(st, _context);
652 st->cr();
653 }
654
655 STEP("printing code blob if possible")
656
657 if (_verbose && _context) {
658 CodeBlob* cb = CodeCache::find_blob(_pc);
659 if (cb != NULL) {
660 if (Interpreter::contains(_pc)) {
661 // The interpreter CodeBlob is very large so try to print the codelet instead.
662 InterpreterCodelet* codelet = Interpreter::codelet_containing(_pc);
663 if (codelet != NULL) {
664 codelet->print_on(st);
665 Disassembler::decode(codelet->code_begin(), codelet->code_end(), st);
666 }
667 } else {
668 StubCodeDesc* desc = StubCodeDesc::desc_for(_pc);
669 if (desc != NULL) {
670 desc->print_on(st);
671 Disassembler::decode(desc->begin(), desc->end(), st);
672 } else {
673 Disassembler::decode(cb, st);
674 st->cr();
675 }
676 }
677 }
678 }
679
680 STEP("printing VM operation")
681
682 if (_verbose && _thread && _thread->is_VM_thread()) {
683 VMThread* t = (VMThread*)_thread;
684 VM_Operation* op = t->vm_operation();
685 if (op) {
686 op->print_on_error(st);
687 st->cr();
688 st->cr();
689 }
690 }
691
692 STEP("printing process")
693
694 if (_verbose) {
695 st->cr();
696 st->print_cr("--------------- P R O C E S S ---------------");
697 st->cr();
698 }
699
700 STEP("printing all threads")
701
702 // all threads
703 if (_verbose && _thread) {
704 Threads::print_on_error(st, _thread, buf, sizeof(buf));
705 st->cr();
706 }
707
708 STEP("printing VM state")
709
710 if (_verbose) {
711 // Safepoint state
712 st->print("VM state:");
713
714 if (SafepointSynchronize::is_synchronizing()) st->print("synchronizing");
715 else if (SafepointSynchronize::is_at_safepoint()) st->print("at safepoint");
716 else st->print("not at safepoint");
717
718 // Also see if error occurred during initialization or shutdown
719 if (!Universe::is_fully_initialized()) {
720 st->print(" (not fully initialized)");
721 } else if (VM_Exit::vm_exited()) {
722 st->print(" (shutting down)");
723 } else {
724 st->print(" (normal execution)");
725 }
726 st->cr();
727 st->cr();
728 }
729
730 STEP("printing owned locks on error")
731
732 // mutexes/monitors that currently have an owner
733 if (_verbose) {
734 print_owned_locks_on_error(st);
735 st->cr();
736 }
737
738 STEP("printing number of OutOfMemoryError and StackOverflow exceptions")
739
740 if (_verbose && Exceptions::has_exception_counts()) {
741 st->print_cr("OutOfMemory and StackOverflow Exception counts:");
742 Exceptions::print_exception_counts_on_error(st);
743 st->cr();
744 }
745
746 STEP("printing compressed oops mode")
747
748 if (_verbose && UseCompressedOops) {
749 Universe::print_compressed_oops_mode(st);
750 if (UseCompressedClassPointers) {
751 Metaspace::print_compressed_class_space(st);
752 }
753 st->cr();
754 }
755
756 STEP("printing heap information")
757
758 if (_verbose && Universe::is_fully_initialized()) {
759 Universe::heap()->print_on_error(st);
760 st->cr();
761 st->print_cr("Polling page: " INTPTR_FORMAT, p2i(os::get_polling_page()));
762 st->cr();
763 }
764
765 STEP("printing code cache information")
766
767 if (_verbose && Universe::is_fully_initialized()) {
768 // print code cache information before vm abort
769 CodeCache::print_summary(st);
770 st->cr();
771 }
772
773 STEP("printing ring buffers")
774
775 if (_verbose) {
776 Events::print_all(st);
777 st->cr();
778 }
779
780 STEP("printing dynamic libraries")
781
782 if (_verbose) {
783 // dynamic libraries, or memory map
784 os::print_dll_info(st);
785 st->cr();
786 }
787
788 STEP("printing VM options")
789
790 if (_verbose) {
791 // VM options
792 Arguments::print_on(st);
793 st->cr();
794 }
795
796 STEP("printing warning if internal testing API used")
797
798 if (WhiteBox::used()) {
799 st->print_cr("Unsupported internal testing APIs have been used.");
800 st->cr();
801 }
802
803 STEP("printing log configuration")
804 if (_verbose){
805 st->print_cr("Logging:");
806 LogConfiguration::describe_current_configuration(st);
807 st->cr();
808 }
809
810 STEP("printing all environment variables")
811
812 if (_verbose) {
813 os::print_environment_variables(st, env_list);
814 st->cr();
815 }
816
817 STEP("printing signal handlers")
818
819 if (_verbose) {
820 os::print_signal_handlers(st, buf, sizeof(buf));
821 st->cr();
822 }
823
824 STEP("Native Memory Tracking")
825 if (_verbose) {
826 MemTracker::error_report(st);
827 }
828
829 STEP("printing system")
830
831 if (_verbose) {
832 st->cr();
833 st->print_cr("--------------- S Y S T E M ---------------");
834 st->cr();
835 }
836
837 STEP("printing OS information")
838
839 if (_verbose) {
840 os::print_os_info(st);
841 st->cr();
842 }
843
844 STEP("printing CPU info")
845 if (_verbose) {
846 os::print_cpu_info(st, buf, sizeof(buf));
847 st->cr();
848 }
849
850 STEP("printing memory info")
851
852 if (_verbose) {
853 os::print_memory_info(st);
854 st->cr();
855 }
856
857 STEP("printing internal vm info")
858
859 if (_verbose) {
860 st->print_cr("vm_info: %s", Abstract_VM_Version::internal_vm_info_string());
861 st->cr();
862 }
863
864 // print a defined marker to show that error handling finished correctly.
865 STEP("printing end marker")
866
867 if (_verbose) {
868 st->print_cr("END.");
869 }
870
871 END
872
873 # undef BEGIN
874 # undef STEP
875 # undef END
876 }
877
878 // Report for the vm_info_cmd. This prints out the information above omitting
879 // crash and thread specific information. If output is added above, it should be added
880 // here also, if it is safe to call during a running process.
881 void VMError::print_vm_info(outputStream* st) {
882
883 char buf[O_BUFLEN];
884 report_vm_version(st, buf, sizeof(buf));
885
886 // STEP("printing summary")
887
888 st->cr();
889 st->print_cr("--------------- S U M M A R Y ------------");
890 st->cr();
891
892 // STEP("printing VM option summary")
893
894 // VM options
895 Arguments::print_summary_on(st);
896 st->cr();
897
898 // STEP("printing summary machine and OS info")
899
900 os::print_summary_info(st, buf, sizeof(buf));
901
902 // STEP("printing date and time")
903
904 os::print_date_and_time(st, buf, sizeof(buf));
905
906 // Skip: STEP("printing thread")
907
908 // STEP("printing process")
909
910 st->cr();
911 st->print_cr("--------------- P R O C E S S ---------------");
912 st->cr();
913
914 // STEP("printing number of OutOfMemoryError and StackOverflow exceptions")
915
916 if (Exceptions::has_exception_counts()) {
917 st->print_cr("OutOfMemory and StackOverflow Exception counts:");
918 Exceptions::print_exception_counts_on_error(st);
919 st->cr();
920 }
921
922 // STEP("printing compressed oops mode")
923
924 if (UseCompressedOops) {
925 Universe::print_compressed_oops_mode(st);
926 if (UseCompressedClassPointers) {
927 Metaspace::print_compressed_class_space(st);
928 }
929 st->cr();
930 }
931
932 // STEP("printing heap information")
933
934 if (Universe::is_fully_initialized()) {
935 MutexLocker hl(Heap_lock);
936 Universe::heap()->print_on_error(st);
937 st->cr();
938 st->print_cr("Polling page: " INTPTR_FORMAT, p2i(os::get_polling_page()));
939 st->cr();
940 }
941
942 // STEP("printing code cache information")
943
944 if (Universe::is_fully_initialized()) {
945 // print code cache information before vm abort
946 CodeCache::print_summary(st);
947 st->cr();
948 }
949
950 // STEP("printing ring buffers")
951
952 Events::print_all(st);
953 st->cr();
954
955 // STEP("printing dynamic libraries")
956
957 // dynamic libraries, or memory map
958 os::print_dll_info(st);
959 st->cr();
960
961 // STEP("printing VM options")
962
963 // VM options
964 Arguments::print_on(st);
965 st->cr();
966
967 // STEP("printing warning if internal testing API used")
968
969 if (WhiteBox::used()) {
970 st->print_cr("Unsupported internal testing APIs have been used.");
971 st->cr();
972 }
973
974 // STEP("printing log configuration")
975 st->print_cr("Logging:");
976 LogConfiguration::describe(st);
977 st->cr();
978
979 // STEP("printing all environment variables")
980
981 os::print_environment_variables(st, env_list);
982 st->cr();
983
984 // STEP("printing signal handlers")
985
986 os::print_signal_handlers(st, buf, sizeof(buf));
987 st->cr();
988
989 // STEP("Native Memory Tracking")
990
991 MemTracker::error_report(st);
992
993 // STEP("printing system")
994
995 st->cr();
996 st->print_cr("--------------- S Y S T E M ---------------");
997 st->cr();
998
999 // STEP("printing OS information")
1000
1001 os::print_os_info(st);
1002 st->cr();
1003
1004 // STEP("printing CPU info")
1005
1006 os::print_cpu_info(st, buf, sizeof(buf));
1007 st->cr();
1008
1009 // STEP("printing memory info")
1010
1011 os::print_memory_info(st);
1012 st->cr();
1013
1014 // STEP("printing internal vm info")
1015
1016 st->print_cr("vm_info: %s", Abstract_VM_Version::internal_vm_info_string());
1017 st->cr();
1018
1019 // print a defined marker to show that error handling finished correctly.
1020 // STEP("printing end marker")
1021
1022 st->print_cr("END.");
1023 }
1024
1025 volatile intptr_t VMError::first_error_tid = -1;
1026
1027 // An error could happen before tty is initialized or after it has been
1028 // destroyed.
1029 // Please note: to prevent large stack allocations, the log- and
1030 // output-stream use a global scratch buffer for format printing.
1031 // (see VmError::report_and_die(). Access to those streams is synchronized
1032 // in VmError::report_and_die() - there is only one reporting thread at
1033 // any given time.
1034 fdStream VMError::out(defaultStream::output_fd());
1035 fdStream VMError::log; // error log used by VMError::report_and_die()
1036
1037 /** Expand a pattern into a buffer starting at pos and open a file using constructed path */
1038 static int expand_and_open(const char* pattern, char* buf, size_t buflen, size_t pos) {
1039 int fd = -1;
1040 if (Arguments::copy_expand_pid(pattern, strlen(pattern), &buf[pos], buflen - pos)) {
1041 // the O_EXCL flag will cause the open to fail if the file exists
1042 fd = open(buf, O_RDWR | O_CREAT | O_EXCL, 0666);
1043 }
1044 return fd;
1045 }
1046
1047 /**
1048 * Construct file name for a log file and return it's file descriptor.
1049 * Name and location depends on pattern, default_pattern params and access
1050 * permissions.
1051 */
1052 static int prepare_log_file(const char* pattern, const char* default_pattern, char* buf, size_t buflen) {
1053 int fd = -1;
1054
1055 // If possible, use specified pattern to construct log file name
1056 if (pattern != NULL) {
1057 fd = expand_and_open(pattern, buf, buflen, 0);
1058 }
1059
1060 // Either user didn't specify, or the user's location failed,
1061 // so use the default name in the current directory
1062 if (fd == -1) {
1063 const char* cwd = os::get_current_directory(buf, buflen);
1064 if (cwd != NULL) {
1065 size_t pos = strlen(cwd);
1066 int fsep_len = jio_snprintf(&buf[pos], buflen-pos, "%s", os::file_separator());
1067 pos += fsep_len;
1068 if (fsep_len > 0) {
1069 fd = expand_and_open(default_pattern, buf, buflen, pos);
1070 }
1071 }
1072 }
1073
1074 // try temp directory if it exists.
1075 if (fd == -1) {
1076 const char* tmpdir = os::get_temp_directory();
1077 if (tmpdir != NULL && strlen(tmpdir) > 0) {
1078 int pos = jio_snprintf(buf, buflen, "%s%s", tmpdir, os::file_separator());
1079 if (pos > 0) {
1080 fd = expand_and_open(default_pattern, buf, buflen, pos);
1081 }
1082 }
1083 }
1084
1085 return fd;
1086 }
1087
1088 int VMError::_id;
1089 const char* VMError::_message;
1090 char VMError::_detail_msg[1024];
1091 Thread* VMError::_thread;
1092 address VMError::_pc;
1093 void* VMError::_siginfo;
1094 void* VMError::_context;
1095 const char* VMError::_filename;
1096 int VMError::_lineno;
1097 size_t VMError::_size;
1098
1099 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo,
1100 void* context, const char* detail_fmt, ...)
1101 {
1102 va_list detail_args;
1103 va_start(detail_args, detail_fmt);
1104 report_and_die(sig, NULL, detail_fmt, detail_args, thread, pc, siginfo, context, NULL, 0, 0);
1105 va_end(detail_args);
1106 }
1107
1108 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo, void* context)
1109 {
1110 report_and_die(thread, sig, pc, siginfo, context, "%s", "");
1111 }
1112
1113 void VMError::report_and_die(const char* message, const char* detail_fmt, ...)
1114 {
1115 va_list detail_args;
1116 va_start(detail_args, detail_fmt);
1117 report_and_die(INTERNAL_ERROR, message, detail_fmt, detail_args, NULL, NULL, NULL, NULL, NULL, 0, 0);
1118 va_end(detail_args);
1119 }
1120
1121 void VMError::report_and_die(const char* message)
1122 {
1123 report_and_die(message, "%s", "");
1124 }
1125
1126 void VMError::report_and_die(Thread* thread, const char* filename, int lineno, const char* message,
1127 const char* detail_fmt, va_list detail_args)
1128 {
1129 report_and_die(INTERNAL_ERROR, message, detail_fmt, detail_args, thread, NULL, NULL, NULL, filename, lineno, 0);
1130 }
1131
1132 void VMError::report_and_die(Thread* thread, const char* filename, int lineno, size_t size,
1133 VMErrorType vm_err_type, const char* detail_fmt, va_list detail_args) {
1134 report_and_die(vm_err_type, NULL, detail_fmt, detail_args, thread, NULL, NULL, NULL, filename, lineno, size);
1135 }
1136
1137 void VMError::report_and_die(int id, const char* message, const char* detail_fmt, va_list detail_args,
1138 Thread* thread, address pc, void* siginfo, void* context, const char* filename,
1139 int lineno, size_t size)
1140 {
1141 // Don't allocate large buffer on stack
1142 static char buffer[O_BUFLEN];
1143 out.set_scratch_buffer(buffer, sizeof(buffer));
1144 log.set_scratch_buffer(buffer, sizeof(buffer));
1145
1146 // How many errors occurred in error handler when reporting first_error.
1147 static int recursive_error_count;
1148
1149 // We will first print a brief message to standard out (verbose = false),
1150 // then save detailed information in log file (verbose = true).
1151 static bool out_done = false; // done printing to standard out
1152 static bool log_done = false; // done saving error log
1153 static bool transmit_report_done = false; // done error reporting
1154
1155 if (SuppressFatalErrorMessage) {
1156 os::abort(CreateCoredumpOnCrash);
1157 }
1158 intptr_t mytid = os::current_thread_id();
1159 if (first_error_tid == -1 &&
1160 Atomic::cmpxchg_ptr(mytid, &first_error_tid, -1) == -1) {
1161
1162 // Initialize time stamps to use the same base.
1163 out.time_stamp().update_to(1);
1164 log.time_stamp().update_to(1);
1165
1166 _id = id;
1167 _message = message;
1168 _thread = thread;
1169 _pc = pc;
1170 _siginfo = siginfo;
1171 _context = context;
1172 _filename = filename;
1173 _lineno = lineno;
1174 _size = size;
1175 jio_vsnprintf(_detail_msg, sizeof(_detail_msg), detail_fmt, detail_args);
1176
1177 // first time
1178 set_error_reported();
1179
1180 if (ShowMessageBoxOnError || PauseAtExit) {
1181 show_message_box(buffer, sizeof(buffer));
1182
1183 // User has asked JVM to abort. Reset ShowMessageBoxOnError so the
1184 // WatcherThread can kill JVM if the error handler hangs.
1185 ShowMessageBoxOnError = false;
1186 }
1187
1188 os::check_dump_limit(buffer, sizeof(buffer));
1189
1190 // reset signal handlers or exception filter; make sure recursive crashes
1191 // are handled properly.
1192 reset_signal_handlers();
1193
1194 TRACE_VM_ERROR();
1195
1196 } else {
1197 // If UseOsErrorReporting we call this for each level of the call stack
1198 // while searching for the exception handler. Only the first level needs
1199 // to be reported.
1200 if (UseOSErrorReporting && log_done) return;
1201
1202 // This is not the first error, see if it happened in a different thread
1203 // or in the same thread during error reporting.
1204 if (first_error_tid != mytid) {
1205 char msgbuf[64];
1206 jio_snprintf(msgbuf, sizeof(msgbuf),
1207 "[thread " INTX_FORMAT " also had an error]",
1208 mytid);
1209 out.print_raw_cr(msgbuf);
1210
1211 // error reporting is not MT-safe, block current thread
1212 os::infinite_sleep();
1213
1214 } else {
1215 if (recursive_error_count++ > 30) {
1216 out.print_raw_cr("[Too many errors, abort]");
1217 os::die();
1218 }
1219
1220 jio_snprintf(buffer, sizeof(buffer),
1221 "[error occurred during error reporting (%s), id 0x%x]",
1222 _current_step_info, _id);
1223 if (log.is_open()) {
1224 log.cr();
1225 log.print_raw_cr(buffer);
1226 log.cr();
1227 } else {
1228 out.cr();
1229 out.print_raw_cr(buffer);
1230 out.cr();
1231 }
1232 }
1233 }
1234
1235 // print to screen
1236 if (!out_done) {
1237 report(&out, false);
1238
1239 out_done = true;
1240
1241 _current_step = 0;
1242 _current_step_info = "";
1243 }
1244
1245 // print to error log file
1246 if (!log_done) {
1247 // see if log file is already open
1248 if (!log.is_open()) {
1249 // open log file
1250 int fd = prepare_log_file(ErrorFile, "hs_err_pid%p.log", buffer, sizeof(buffer));
1251 if (fd != -1) {
1252 out.print_raw("# An error report file with more information is saved as:\n# ");
1253 out.print_raw_cr(buffer);
1254
1255 log.set_fd(fd);
1256 } else {
1257 out.print_raw_cr("# Can not save log file, dump to screen..");
1258 log.set_fd(defaultStream::output_fd());
1259 /* Error reporting currently needs dumpfile.
1260 * Maybe implement direct streaming in the future.*/
1261 transmit_report_done = true;
1262 }
1263 }
1264
1265 report(&log, true);
1266 _current_step = 0;
1267 _current_step_info = "";
1268
1269 // Run error reporting to determine whether or not to report the crash.
1270 if (!transmit_report_done && should_report_bug(_id)) {
1271 transmit_report_done = true;
1272 const int fd2 = ::dup(log.fd());
1273 FILE* const hs_err = ::fdopen(fd2, "r");
1274 if (NULL != hs_err) {
1275 ErrorReporter er;
1276 er.call(hs_err, buffer, O_BUFLEN);
1277 }
1278 ::fclose(hs_err);
1279 }
1280
1281 if (log.fd() != defaultStream::output_fd()) {
1282 close(log.fd());
1283 }
1284
1285 log.set_fd(-1);
1286 log_done = true;
1287 }
1288
1289 static bool skip_replay = ReplayCompiles; // Do not overwrite file during replay
1290 if (DumpReplayDataOnError && _thread && _thread->is_Compiler_thread() && !skip_replay) {
1291 skip_replay = true;
1292 ciEnv* env = ciEnv::current();
1293 if (env != NULL) {
1294 int fd = prepare_log_file(ReplayDataFile, "replay_pid%p.log", buffer, sizeof(buffer));
1295 if (fd != -1) {
1296 FILE* replay_data_file = os::open(fd, "w");
1297 if (replay_data_file != NULL) {
1298 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1299 env->dump_replay_data_unsafe(&replay_data_stream);
1300 out.print_raw("#\n# Compiler replay data is saved as:\n# ");
1301 out.print_raw_cr(buffer);
1302 } else {
1303 int e = errno;
1304 out.print_raw("#\n# Can't open file to dump replay data. Error: ");
1305 out.print_raw_cr(os::strerror(e));
1306 }
1307 }
1308 }
1309 }
1310
1311 static bool skip_bug_url = !should_report_bug(_id);
1312 if (!skip_bug_url) {
1313 skip_bug_url = true;
1314
1315 out.print_raw_cr("#");
1316 print_bug_submit_message(&out, _thread);
1317 }
1318
1319 static bool skip_OnError = false;
1320 if (!skip_OnError && OnError && OnError[0]) {
1321 skip_OnError = true;
1322
1323 // Flush output and finish logs before running OnError commands.
1324 ostream_abort();
1325
1326 out.print_raw_cr("#");
1327 out.print_raw ("# -XX:OnError=\"");
1328 out.print_raw (OnError);
1329 out.print_raw_cr("\"");
1330
1331 char* cmd;
1332 const char* ptr = OnError;
1333 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
1334 out.print_raw ("# Executing ");
1335 #if defined(LINUX) || defined(_ALLBSD_SOURCE)
1336 out.print_raw ("/bin/sh -c ");
1337 #elif defined(SOLARIS)
1338 out.print_raw ("/usr/bin/sh -c ");
1339 #endif
1340 out.print_raw ("\"");
1341 out.print_raw (cmd);
1342 out.print_raw_cr("\" ...");
1343
1344 if (os::fork_and_exec(cmd) < 0) {
1345 out.print_cr("os::fork_and_exec failed: %s (%s=%d)",
1346 os::strerror(errno), os::errno_name(errno), errno);
1347 }
1348 }
1349
1350 // done with OnError
1351 OnError = NULL;
1352 }
1353
1354 if (!UseOSErrorReporting) {
1355 // os::abort() will call abort hooks, try it first.
1356 static bool skip_os_abort = false;
1357 if (!skip_os_abort) {
1358 skip_os_abort = true;
1359 bool dump_core = should_report_bug(_id);
1360 os::abort(dump_core && CreateCoredumpOnCrash, _siginfo, _context);
1361 }
1362
1363 // if os::abort() doesn't abort, try os::die();
1364 os::die();
1365 }
1366 }
1367
1368 /*
1369 * OnOutOfMemoryError scripts/commands executed while VM is a safepoint - this
1370 * ensures utilities such as jmap can observe the process is a consistent state.
1371 */
1372 class VM_ReportJavaOutOfMemory : public VM_Operation {
1373 private:
1374 const char* _message;
1375 public:
1376 VM_ReportJavaOutOfMemory(const char* message) { _message = message; }
1377 VMOp_Type type() const { return VMOp_ReportJavaOutOfMemory; }
1378 void doit();
1379 };
1380
1381 void VM_ReportJavaOutOfMemory::doit() {
1382 // Don't allocate large buffer on stack
1383 static char buffer[O_BUFLEN];
1384
1385 tty->print_cr("#");
1386 tty->print_cr("# java.lang.OutOfMemoryError: %s", _message);
1387 tty->print_cr("# -XX:OnOutOfMemoryError=\"%s\"", OnOutOfMemoryError);
1388
1389 // make heap parsability
1390 Universe::heap()->ensure_parsability(false); // no need to retire TLABs
1391
1392 char* cmd;
1393 const char* ptr = OnOutOfMemoryError;
1394 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
1395 tty->print("# Executing ");
1396 #if defined(LINUX)
1397 tty->print ("/bin/sh -c ");
1398 #elif defined(SOLARIS)
1399 tty->print ("/usr/bin/sh -c ");
1400 #endif
1401 tty->print_cr("\"%s\"...", cmd);
1402
1403 if (os::fork_and_exec(cmd) < 0) {
1404 tty->print_cr("os::fork_and_exec failed: %s (%s=%d)",
1405 os::strerror(errno), os::errno_name(errno), errno);
1406 }
1407 }
1408 }
1409
1410 void VMError::report_java_out_of_memory(const char* message) {
1411 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
1412 MutexLocker ml(Heap_lock);
1413 VM_ReportJavaOutOfMemory op(message);
1414 VMThread::execute(&op);
1415 }
1416 }
1417
1418 void VMError::show_message_box(char *buf, int buflen) {
1419 bool yes;
1420 do {
1421 error_string(buf, buflen);
1422 yes = os::start_debugging(buf,buflen);
1423 } while (yes);
1424 }