1 /*
2 * Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2017, 2020 SAP SE. All rights reserved.
4 * Copyright (c) 2023, Red Hat, Inc. and/or its affiliates.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "precompiled.hpp"
28 #include "cds/metaspaceShared.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compilationFailureInfo.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/gcConfig.hpp"
34 #include "gc/shared/gcLogPrecious.hpp"
35 #include "jvm.h"
36 #include "logging/logConfiguration.hpp"
37 #include "memory/allocation.hpp"
38 #include "memory/metaspace.hpp"
39 #include "memory/metaspaceUtils.hpp"
40 #include "memory/resourceArea.inline.hpp"
41 #include "memory/universe.hpp"
42 #include "nmt/memTracker.hpp"
43 #include "oops/compressedOops.hpp"
44 #include "prims/whitebox.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/atomic.hpp"
47 #include "runtime/flags/jvmFlag.hpp"
48 #include "runtime/frame.inline.hpp"
49 #include "runtime/init.hpp"
50 #include "runtime/javaThread.inline.hpp"
51 #include "runtime/os.inline.hpp"
52 #include "runtime/osThread.hpp"
53 #include "runtime/safefetch.hpp"
54 #include "runtime/safepointMechanism.hpp"
55 #include "runtime/stackFrameStream.inline.hpp"
56 #include "runtime/stackOverflow.hpp"
57 #include "runtime/threads.hpp"
58 #include "runtime/threadSMR.hpp"
59 #include "runtime/trimNativeHeap.hpp"
60 #include "runtime/vmOperations.hpp"
61 #include "runtime/vmThread.hpp"
62 #include "runtime/vm_version.hpp"
63 #include "utilities/debug.hpp"
64 #include "utilities/decoder.hpp"
65 #include "utilities/defaultStream.hpp"
66 #include "utilities/events.hpp"
67 #include "utilities/globalDefinitions.hpp"
68 #include "utilities/macros.hpp"
69 #include "utilities/ostream.hpp"
70 #include "utilities/vmError.hpp"
71 #if INCLUDE_JFR
72 #include "jfr/jfr.hpp"
73 #endif
74 #if INCLUDE_JVMCI
75 #include "jvmci/jvmci.hpp"
76 #endif
77
78 #ifndef PRODUCT
79 #include <signal.h>
80 #endif // PRODUCT
81
82 bool VMError::coredump_status;
83 char VMError::coredump_message[O_BUFLEN];
84 int VMError::_current_step;
85 const char* VMError::_current_step_info;
86 volatile jlong VMError::_reporting_start_time = -1;
87 volatile bool VMError::_reporting_did_timeout = false;
88 volatile jlong VMError::_step_start_time = -1;
89 volatile bool VMError::_step_did_timeout = false;
90 volatile bool VMError::_step_did_succeed = false;
91 volatile intptr_t VMError::_first_error_tid = -1;
92 int VMError::_id;
93 const char* VMError::_message;
94 char VMError::_detail_msg[1024];
95 Thread* VMError::_thread;
96 address VMError::_pc;
97 void* VMError::_siginfo;
98 void* VMError::_context;
99 bool VMError::_print_native_stack_used = false;
100 const char* VMError::_filename;
101 int VMError::_lineno;
102 size_t VMError::_size;
103 const size_t VMError::_reattempt_required_stack_headroom = 64 * K;
104 const intptr_t VMError::segfault_address = pd_segfault_address;
105
106 // List of environment variables that should be reported in error log file.
107 static const char* env_list[] = {
108 // All platforms
109 "JAVA_HOME", "JAVA_TOOL_OPTIONS", "_JAVA_OPTIONS", "CLASSPATH",
110 "PATH", "USERNAME",
111
112 "XDG_CACHE_HOME", "XDG_CONFIG_HOME", "FC_LANG", "FONTCONFIG_USE_MMAP",
113
114 // Env variables that are defined on Linux/BSD
115 "LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY",
116 "HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE",
117 "LANG", "LC_ALL", "LC_CTYPE", "LC_NUMERIC", "LC_TIME",
118 "TERM", "TMPDIR", "TZ",
119
120 // defined on AIX
121 "LIBPATH", "LDR_PRELOAD", "LDR_PRELOAD64",
122
123 // defined on Linux/AIX/BSD
124 "_JAVA_SR_SIGNUM",
125
126 // defined on Darwin
127 "DYLD_LIBRARY_PATH", "DYLD_FALLBACK_LIBRARY_PATH",
128 "DYLD_FRAMEWORK_PATH", "DYLD_FALLBACK_FRAMEWORK_PATH",
129 "DYLD_INSERT_LIBRARIES",
130
131 // defined on Windows
132 "OS", "PROCESSOR_IDENTIFIER", "_ALT_JAVA_HOME_DIR", "TMP", "TEMP",
133
134 (const char *)0
135 };
136
137 // A simple parser for -XX:OnError, usage:
138 // ptr = OnError;
139 // while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr) != nullptr)
140 // ... ...
141 static char* next_OnError_command(char* buf, int buflen, const char** ptr) {
142 if (ptr == nullptr || *ptr == nullptr) return nullptr;
143
144 const char* cmd = *ptr;
145
146 // skip leading blanks or ';'
147 while (*cmd == ' ' || *cmd == ';') cmd++;
148
149 if (*cmd == '\0') return nullptr;
150
151 const char * cmdend = cmd;
152 while (*cmdend != '\0' && *cmdend != ';') cmdend++;
153
154 Arguments::copy_expand_pid(cmd, cmdend - cmd, buf, buflen);
155
156 *ptr = (*cmdend == '\0' ? cmdend : cmdend + 1);
157 return buf;
158 }
159
160 static void print_bug_submit_message(outputStream *out, Thread *thread) {
161 if (out == nullptr) return;
162 const char *url = Arguments::java_vendor_url_bug();
163 if (url == nullptr || *url == '\0')
164 url = JDK_Version::runtime_vendor_vm_bug_url();
165 if (url != nullptr && *url != '\0') {
166 out->print_raw_cr("# If you would like to submit a bug report, please visit:");
167 out->print_raw ("# ");
168 out->print_raw_cr(url);
169 }
170 // If the crash is in native code, encourage user to submit a bug to the
171 // provider of that code.
172 if (thread && thread->is_Java_thread() &&
173 !thread->is_hidden_from_external_view()) {
174 if (JavaThread::cast(thread)->thread_state() == _thread_in_native) {
175 out->print_cr("# The crash happened outside the Java Virtual Machine in native code.\n# See problematic frame for where to report the bug.");
176 }
177 }
178 out->print_raw_cr("#");
179 }
180
181 static bool stack_has_headroom(size_t headroom) {
182 size_t stack_size = 0;
183 address stack_base = nullptr;
184 os::current_stack_base_and_size(&stack_base, &stack_size);
185
186 const size_t guard_size = StackOverflow::stack_guard_zone_size();
187 const size_t unguarded_stack_size = stack_size - guard_size;
188
189 if (unguarded_stack_size < headroom) {
190 return false;
191 }
192
193 const address unguarded_stack_end = stack_base - unguarded_stack_size;
194 const address stack_pointer = os::current_stack_pointer();
195
196 return stack_pointer >= unguarded_stack_end + headroom;
197 }
198
199 #ifdef ASSERT
200 PRAGMA_DIAG_PUSH
201 PRAGMA_INFINITE_RECURSION_IGNORED
202 void VMError::reattempt_test_hit_stack_limit(outputStream* st) {
203 if (stack_has_headroom(_reattempt_required_stack_headroom)) {
204 // Use all but (_reattempt_required_stack_headroom - K) unguarded stack space.
205 size_t stack_size = 0;
206 address stack_base = nullptr;
207 os::current_stack_base_and_size(&stack_base, &stack_size);
208
209 const size_t guard_size = StackOverflow::stack_guard_zone_size();
210 const address stack_pointer = os::current_stack_pointer();
211
212 const size_t unguarded_stack_size = stack_size - guard_size;
213 const address unguarded_stack_end = stack_base - unguarded_stack_size;
214 const size_t available_headroom = stack_pointer - unguarded_stack_end;
215 const size_t allocation_size = available_headroom - _reattempt_required_stack_headroom + K;
216
217 st->print_cr("Current Stack Pointer: " PTR_FORMAT " alloca " SIZE_FORMAT
218 " of " SIZE_FORMAT " bytes available unguarded stack space",
219 p2i(stack_pointer), allocation_size, available_headroom);
220
221 // Allocate byte blob on the stack. Make pointer volatile to avoid having
222 // the compiler removing later reads.
223 volatile char* stack_buffer = static_cast<char*>(alloca(allocation_size));
224 // Initialize the last byte.
225 stack_buffer[allocation_size - 1] = '\0';
226 // Recursive call should hit the stack limit.
227 reattempt_test_hit_stack_limit(st);
228 // Perform a volatile read of the last byte to avoid having the complier
229 // remove the allocation.
230 static_cast<void>(stack_buffer[allocation_size - 1] == '\0');
231 }
232 controlled_crash(14);
233 }
234 PRAGMA_DIAG_POP
235 #endif // ASSERT
236
237 bool VMError::can_reattempt_step(const char* &stop_reason) {
238 if (!stack_has_headroom(_reattempt_required_stack_headroom)) {
239 stop_reason = "Stack headroom limit reached";
240 return false;
241 }
242
243 if (_step_did_timeout) {
244 stop_reason = "Step time limit reached";
245 return false;
246 }
247
248 return true;
249 }
250
251 void VMError::record_coredump_status(const char* message, bool status) {
252 coredump_status = status;
253 strncpy(coredump_message, message, sizeof(coredump_message));
254 coredump_message[sizeof(coredump_message)-1] = 0;
255 }
256
257 // Return a string to describe the error
258 char* VMError::error_string(char* buf, int buflen) {
259 char signame_buf[64];
260 const char *signame = os::exception_name(_id, signame_buf, sizeof(signame_buf));
261
262 if (signame) {
263 jio_snprintf(buf, buflen,
264 "%s (0x%x) at pc=" PTR_FORMAT ", pid=%d, tid=" UINTX_FORMAT,
265 signame, _id, _pc,
266 os::current_process_id(), os::current_thread_id());
267 } else if (_filename != nullptr && _lineno > 0) {
268 // skip directory names
269 int n = jio_snprintf(buf, buflen,
270 "Internal Error at %s:%d, pid=%d, tid=" UINTX_FORMAT,
271 get_filename_only(), _lineno,
272 os::current_process_id(), os::current_thread_id());
273 if (n >= 0 && n < buflen && _message) {
274 if (strlen(_detail_msg) > 0) {
275 jio_snprintf(buf + n, buflen - n, "%s%s: %s",
276 os::line_separator(), _message, _detail_msg);
277 } else {
278 jio_snprintf(buf + n, buflen - n, "%sError: %s",
279 os::line_separator(), _message);
280 }
281 }
282 } else {
283 jio_snprintf(buf, buflen,
284 "Internal Error (0x%x), pid=%d, tid=" UINTX_FORMAT,
285 _id, os::current_process_id(), os::current_thread_id());
286 }
287
288 return buf;
289 }
290
291 void VMError::print_stack_trace(outputStream* st, JavaThread* jt,
292 char* buf, int buflen, bool verbose) {
293 #ifdef ZERO
294 if (jt->zero_stack()->sp() && jt->top_zero_frame()) {
295 // StackFrameStream uses the frame anchor, which may not have
296 // been set up. This can be done at any time in Zero, however,
297 // so if it hasn't been set up then we just set it up now and
298 // clear it again when we're done.
299 bool has_last_Java_frame = jt->has_last_Java_frame();
300 if (!has_last_Java_frame)
301 jt->set_last_Java_frame();
302 st->print("Java frames:");
303 st->cr();
304
305 // Print the frames
306 StackFrameStream sfs(jt, true /* update */, true /* process_frames */);
307 for(int i = 0; !sfs.is_done(); sfs.next(), i++) {
308 sfs.current()->zero_print_on_error(i, st, buf, buflen);
309 st->cr();
310 }
311
312 // Reset the frame anchor if necessary
313 if (!has_last_Java_frame)
314 jt->reset_last_Java_frame();
315 }
316 #else
317 if (jt->has_last_Java_frame()) {
318 st->print_cr("Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)");
319 for (StackFrameStream sfs(jt, true /* update */, true /* process_frames */); !sfs.is_done(); sfs.next()) {
320 sfs.current()->print_on_error(st, buf, buflen, verbose);
321 st->cr();
322 }
323 }
324 #endif // ZERO
325 }
326
327 /**
328 * Adds `value` to `list` iff it's not already present and there is sufficient
329 * capacity (i.e. length(list) < `list_capacity`). The length of the list
330 * is the index of the first nullptr entry or `list_capacity` if there are
331 * no nullptr entries.
332 *
333 * @ return true if the value was added, false otherwise
334 */
335 static bool add_if_absent(address value, address* list, int list_capacity) {
336 for (int i = 0; i < list_capacity; i++) {
337 if (list[i] == value) {
338 return false;
339 }
340 if (list[i] == nullptr) {
341 list[i] = value;
342 if (i + 1 < list_capacity) {
343 list[i + 1] = nullptr;
344 }
345 return true;
346 }
347 }
348 return false;
349 }
350
351 /**
352 * Prints the VM generated code unit, if any, containing `pc` if it has not already
353 * been printed. If the code unit is an InterpreterCodelet or StubCodeDesc, it is
354 * only printed if `is_crash_pc` is true.
355 *
356 * @param printed array of code units that have already been printed (delimited by nullptr entry)
357 * @param printed_capacity the capacity of `printed`
358 * @return true if the code unit was printed, false otherwise
359 */
360 static bool print_code(outputStream* st, Thread* thread, address pc, bool is_crash_pc,
361 address* printed, int printed_capacity) {
362 if (Interpreter::contains(pc)) {
363 if (is_crash_pc) {
364 // The interpreter CodeBlob is very large so try to print the codelet instead.
365 InterpreterCodelet* codelet = Interpreter::codelet_containing(pc);
366 if (codelet != nullptr) {
367 if (add_if_absent((address) codelet, printed, printed_capacity)) {
368 codelet->print_on(st);
369 Disassembler::decode(codelet->code_begin(), codelet->code_end(), st);
370 return true;
371 }
372 }
373 }
374 } else {
375 StubCodeDesc* desc = StubCodeDesc::desc_for(pc);
376 if (desc != nullptr) {
377 if (is_crash_pc) {
378 if (add_if_absent((address) desc, printed, printed_capacity)) {
379 desc->print_on(st);
380 Disassembler::decode(desc->begin(), desc->end(), st);
381 return true;
382 }
383 }
384 } else if (thread != nullptr) {
385 CodeBlob* cb = CodeCache::find_blob(pc);
386 if (cb != nullptr && add_if_absent((address) cb, printed, printed_capacity)) {
387 // Disassembling nmethod will incur resource memory allocation,
388 // only do so when thread is valid.
389 ResourceMark rm(thread);
390 Disassembler::decode(cb, st);
391 st->cr();
392 return true;
393 }
394 }
395 }
396 return false;
397 }
398
399 // Like above, but only try to figure out a short name. Return nullptr if not found.
400 static const char* find_code_name(address pc) {
401 if (Interpreter::contains(pc)) {
402 InterpreterCodelet* codelet = Interpreter::codelet_containing(pc);
403 if (codelet != nullptr) {
404 return codelet->description();
405 }
406 } else {
407 StubCodeDesc* desc = StubCodeDesc::desc_for(pc);
408 if (desc != nullptr) {
409 return desc->name();
410 } else {
411 CodeBlob* cb = CodeCache::find_blob(pc);
412 if (cb != nullptr) {
413 return cb->name();
414 }
415 }
416 }
417 return nullptr;
418 }
419
420 /**
421 * Gets the caller frame of `fr`.
422 *
423 * @returns an invalid frame (i.e. fr.pc() === 0) if the caller cannot be obtained
424 */
425 static frame next_frame(frame fr, Thread* t) {
426 // Compiled code may use EBP register on x86 so it looks like
427 // non-walkable C frame. Use frame.sender() for java frames.
428 frame invalid;
429 if (t != nullptr && t->is_Java_thread()) {
430 // Catch very first native frame by using stack address.
431 // For JavaThread stack_base and stack_size should be set.
432 if (!t->is_in_full_stack((address)(fr.real_fp() + 1))) {
433 return invalid;
434 }
435 if (fr.is_interpreted_frame() || (fr.cb() != nullptr && fr.cb()->frame_size() > 0)) {
436 RegisterMap map(JavaThread::cast(t),
437 RegisterMap::UpdateMap::skip,
438 RegisterMap::ProcessFrames::include,
439 RegisterMap::WalkContinuation::skip); // No update
440 return fr.sender(&map);
441 } else {
442 // is_first_C_frame() does only simple checks for frame pointer,
443 // it will pass if java compiled code has a pointer in EBP.
444 if (os::is_first_C_frame(&fr)) return invalid;
445 return os::get_sender_for_C_frame(&fr);
446 }
447 } else {
448 if (os::is_first_C_frame(&fr)) return invalid;
449 return os::get_sender_for_C_frame(&fr);
450 }
451 }
452
453 void VMError::print_native_stack(outputStream* st, frame fr, Thread* t, bool print_source_info, int max_frames, char* buf, int buf_size) {
454
455 // see if it's a valid frame
456 if (fr.pc()) {
457 st->print_cr("Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)");
458 const int limit = max_frames == -1 ? StackPrintLimit : MIN2(max_frames, StackPrintLimit);
459 int count = 0;
460 while (count++ < limit) {
461 fr.print_on_error(st, buf, buf_size);
462 if (fr.pc()) { // print source file and line, if available
463 char filename[128];
464 int line_no;
465 if (count == 1 && _lineno != 0) {
466 // We have source information of the first frame for internal errors. There is no need to parse it from the symbols.
467 st->print(" (%s:%d)", get_filename_only(), _lineno);
468 } else if (print_source_info &&
469 Decoder::get_source_info(fr.pc(), filename, sizeof(filename), &line_no, count != 1)) {
470 st->print(" (%s:%d)", filename, line_no);
471 }
472 }
473 st->cr();
474 fr = next_frame(fr, t);
475 if (fr.pc() == nullptr) {
476 break;
477 }
478 }
479
480 if (count > limit) {
481 st->print_cr("...<more frames>...");
482 }
483
484 } else {
485 st->print_cr("Native frames: <unavailable>");
486 }
487 }
488
489 static void print_oom_reasons(outputStream* st) {
490 st->print_cr("# Possible reasons:");
491 st->print_cr("# The system is out of physical RAM or swap space");
492 #ifdef LINUX
493 st->print_cr("# This process has exceeded the maximum number of memory mappings (check below");
494 st->print_cr("# for `/proc/sys/vm/max_map_count` and `Total number of mappings`)");
495 #endif
496 if (UseCompressedOops) {
497 st->print_cr("# This process is running with CompressedOops enabled, and the Java Heap may be blocking the growth of the native heap");
498 }
499 if (LogBytesPerWord == 2) {
500 st->print_cr("# In 32 bit mode, the process size limit was hit");
501 }
502 st->print_cr("# Possible solutions:");
503 st->print_cr("# Reduce memory load on the system");
504 st->print_cr("# Increase physical memory or swap space");
505 st->print_cr("# Check if swap backing store is full");
506 if (LogBytesPerWord == 2) {
507 st->print_cr("# Use 64 bit Java on a 64 bit OS");
508 }
509 st->print_cr("# Decrease Java heap size (-Xmx/-Xms)");
510 st->print_cr("# Decrease number of Java threads");
511 st->print_cr("# Decrease Java thread stack sizes (-Xss)");
512 st->print_cr("# Set larger code cache with -XX:ReservedCodeCacheSize=");
513 if (UseCompressedOops) {
514 switch (CompressedOops::mode()) {
515 case CompressedOops::UnscaledNarrowOop:
516 st->print_cr("# JVM is running with Unscaled Compressed Oops mode in which the Java heap is");
517 st->print_cr("# placed in the first 4GB address space. The Java Heap base address is the");
518 st->print_cr("# maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
519 st->print_cr("# to set the Java Heap base and to place the Java Heap above 4GB virtual address.");
520 break;
521 case CompressedOops::ZeroBasedNarrowOop:
522 st->print_cr("# JVM is running with Zero Based Compressed Oops mode in which the Java heap is");
523 st->print_cr("# placed in the first 32GB address space. The Java Heap base address is the");
524 st->print_cr("# maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
525 st->print_cr("# to set the Java Heap base and to place the Java Heap above 32GB virtual address.");
526 break;
527 default:
528 break;
529 }
530 }
531 st->print_cr("# This output file may be truncated or incomplete.");
532 }
533
534 static void print_stack_location(outputStream* st, void* context, int& continuation) {
535 const int number_of_stack_slots = 8;
536
537 int i = continuation;
538 // Update continuation with next index before fetching frame
539 continuation = i + 1;
540 const frame fr = os::fetch_frame_from_context(context);
541 while (i < number_of_stack_slots) {
542 // Update continuation with next index before printing location
543 continuation = i + 1;
544 // decode stack contents if possible
545 const intptr_t *sp = fr.sp();
546 const intptr_t *slot = sp + i;
547 if (!is_aligned(slot, sizeof(intptr_t))) {
548 st->print_cr("Misaligned sp: " PTR_FORMAT, p2i(sp));
549 break;
550 } else if (os::is_readable_pointer(slot)) {
551 st->print("stack at sp + %d slots: ", i);
552 os::print_location(st, *(slot));
553 } else {
554 st->print_cr("unreadable stack slot at sp + %d", i);
555 }
556 ++i;
557 }
558 }
559
560 static void report_vm_version(outputStream* st, char* buf, int buflen) {
561 // VM version
562 st->print_cr("#");
563 JDK_Version::current().to_string(buf, buflen);
564 const char* runtime_name = JDK_Version::runtime_name() != nullptr ?
565 JDK_Version::runtime_name() : "";
566 const char* runtime_version = JDK_Version::runtime_version() != nullptr ?
567 JDK_Version::runtime_version() : "";
568 const char* vendor_version = JDK_Version::runtime_vendor_version() != nullptr ?
569 JDK_Version::runtime_vendor_version() : "";
570 const char* jdk_debug_level = VM_Version::printable_jdk_debug_level() != nullptr ?
571 VM_Version::printable_jdk_debug_level() : "";
572
573 st->print_cr("# JRE version: %s%s%s (%s) (%sbuild %s)", runtime_name,
574 (*vendor_version != '\0') ? " " : "", vendor_version,
575 buf, jdk_debug_level, runtime_version);
576
577 // This is the long version with some default settings added
578 st->print_cr("# Java VM: %s%s%s (%s%s, %s%s%s%s%s%s%s, %s, %s)",
579 VM_Version::vm_name(),
580 (*vendor_version != '\0') ? " " : "", vendor_version,
581 jdk_debug_level,
582 VM_Version::vm_release(),
583 VM_Version::vm_info_string(),
584 TieredCompilation ? ", tiered" : "",
585 #if INCLUDE_JVMCI
586 EnableJVMCI ? ", jvmci" : "",
587 UseJVMCICompiler ? ", jvmci compiler" : "",
588 #else
589 "", "",
590 #endif
591 UseCompressedOops ? ", compressed oops" : "",
592 UseCompressedClassPointers ? ", compressed class ptrs" : "",
593 LockingMode == LM_MONITOR ? ", lm_monitors" :
594 LockingMode == LM_LEGACY ? ", lm_legacy" :
595 LockingMode == LM_LIGHTWEIGHT ? ", lm_lightweight" : "",
596 GCConfig::hs_err_name(),
597 VM_Version::vm_platform_string()
598 );
599 }
600
601 // Returns true if at least one thread reported a fatal error and fatal error handling is in process.
602 bool VMError::is_error_reported() {
603 return _first_error_tid != -1;
604 }
605
606 // Returns true if the current thread reported a fatal error.
607 bool VMError::is_error_reported_in_current_thread() {
608 return _first_error_tid == os::current_thread_id();
609 }
610
611 // Helper, return current timestamp for timeout handling.
612 jlong VMError::get_current_timestamp() {
613 return os::javaTimeNanos();
614 }
615 // Factor to translate the timestamp to seconds.
616 #define TIMESTAMP_TO_SECONDS_FACTOR (1000 * 1000 * 1000)
617
618 void VMError::record_reporting_start_time() {
619 const jlong now = get_current_timestamp();
620 Atomic::store(&_reporting_start_time, now);
621 }
622
623 jlong VMError::get_reporting_start_time() {
624 return Atomic::load(&_reporting_start_time);
625 }
626
627 void VMError::record_step_start_time() {
628 const jlong now = get_current_timestamp();
629 Atomic::store(&_step_start_time, now);
630 }
631
632 jlong VMError::get_step_start_time() {
633 return Atomic::load(&_step_start_time);
634 }
635
636 void VMError::clear_step_start_time() {
637 return Atomic::store(&_step_start_time, (jlong)0);
638 }
639
640 // This is the main function to report a fatal error. Only one thread can
641 // call this function, so we don't need to worry about MT-safety. But it's
642 // possible that the error handler itself may crash or die on an internal
643 // error, for example, when the stack/heap is badly damaged. We must be
644 // able to handle recursive errors that happen inside error handler.
645 //
646 // Error reporting is done in several steps. If a crash or internal error
647 // occurred when reporting an error, the nested signal/exception handler
648 // can skip steps that are already (or partially) done. Error reporting will
649 // continue from the next step. This allows us to retrieve and print
650 // information that may be unsafe to get after a fatal error. If it happens,
651 // you may find nested report_and_die() frames when you look at the stack
652 // in a debugger.
653 //
654 // In general, a hang in error handler is much worse than a crash or internal
655 // error, as it's harder to recover from a hang. Deadlock can happen if we
656 // try to grab a lock that is already owned by current thread, or if the
657 // owner is blocked forever (e.g. in os::infinite_sleep()). If possible, the
658 // error handler and all the functions it called should avoid grabbing any
659 // lock. An important thing to notice is that memory allocation needs a lock.
660 //
661 // We should avoid using large stack allocated buffers. Many errors happen
662 // when stack space is already low. Making things even worse is that there
663 // could be nested report_and_die() calls on stack (see above). Only one
664 // thread can report error, so large buffers are statically allocated in data
665 // segment.
666 void VMError::report(outputStream* st, bool _verbose) {
667 // Used by reattempt step logic
668 static int continuation = 0;
669 const char* stop_reattempt_reason = nullptr;
670 # define BEGIN \
671 if (_current_step == 0) { \
672 _step_did_succeed = false; \
673 _current_step = __LINE__; \
674 {
675 // [Begin logic]
676
677 # define STEP_IF(s, cond) \
678 } \
679 _step_did_succeed = true; \
680 } \
681 if (_current_step < __LINE__) { \
682 _step_did_succeed = false; \
683 _current_step = __LINE__; \
684 _current_step_info = s; \
685 if ((cond)) { \
686 record_step_start_time(); \
687 _step_did_timeout = false;
688 // [Step logic]
689
690 # define STEP(s) STEP_IF(s, true)
691
692 # define REATTEMPT_STEP_IF(s, cond) \
693 } \
694 _step_did_succeed = true; \
695 } \
696 if (_current_step < __LINE__ && !_step_did_succeed) { \
697 _current_step = __LINE__; \
698 _current_step_info = s; \
699 const bool cond_value = (cond); \
700 if (cond_value && !can_reattempt_step( \
701 stop_reattempt_reason)) { \
702 st->print_cr("[stop reattempt (%s) reason: %s]", \
703 _current_step_info, \
704 stop_reattempt_reason); \
705 } else if (cond_value) {
706 // [Continue Step logic]
707
708 # define END \
709 } \
710 _step_did_succeed = true; \
711 clear_step_start_time(); \
712 }
713
714 // don't allocate large buffer on stack
715 static char buf[O_BUFLEN];
716
717 // Native stack trace may get stuck. We try to handle the last pc if it
718 // belongs to VM generated code.
719 address lastpc = nullptr;
720
721 BEGIN
722
723 STEP("printing fatal error message")
724 st->print_cr("#");
725 if (should_report_bug(_id)) {
726 st->print_cr("# A fatal error has been detected by the Java Runtime Environment:");
727 } else {
728 st->print_cr("# There is insufficient memory for the Java "
729 "Runtime Environment to continue.");
730 }
731
732 // avoid the cache update for malloc/mmap errors
733 if (should_report_bug(_id)) {
734 os::prepare_native_symbols();
735 }
736
737 #ifdef ASSERT
738 // Error handler self tests
739 // Meaning of codes passed through in the tests.
740 #define TEST_SECONDARY_CRASH 14
741 #define TEST_REATTEMPT_SECONDARY_CRASH 15
742 #define TEST_RESOURCE_MARK_CRASH 2
743
744 // test secondary error handling. Test it twice, to test that resetting
745 // error handler after a secondary crash works.
746 STEP_IF("test secondary crash 1", _verbose && TestCrashInErrorHandler == TEST_SECONDARY_CRASH)
747 st->print_cr("Will crash now (TestCrashInErrorHandler=%u)...",
748 TestCrashInErrorHandler);
749 controlled_crash(TestCrashInErrorHandler);
750
751 STEP_IF("test secondary crash 2", _verbose && TestCrashInErrorHandler == TEST_SECONDARY_CRASH)
752 st->print_cr("Will crash now (TestCrashInErrorHandler=%u)...",
753 TestCrashInErrorHandler);
754 controlled_crash(TestCrashInErrorHandler);
755
756 // See corresponding test in test/runtime/ErrorHandling/ReattemptErrorTest.java
757 STEP_IF("test reattempt secondary crash",
758 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
759 st->print_cr("Will crash now (TestCrashInErrorHandler=%u)...",
760 TestCrashInErrorHandler);
761 controlled_crash(14);
762
763 REATTEMPT_STEP_IF("test reattempt secondary crash, attempt 2",
764 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
765 st->print_cr("test reattempt secondary crash. attempt 2");
766
767 REATTEMPT_STEP_IF("test reattempt secondary crash, attempt 3",
768 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
769 st->print_cr("test reattempt secondary crash. attempt 3");
770
771 STEP_IF("test reattempt timeout",
772 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
773 st->print_cr("test reattempt timeout");
774 os::infinite_sleep();
775
776 REATTEMPT_STEP_IF("test reattempt timeout, attempt 2",
777 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
778 st->print_cr("test reattempt timeout, attempt 2");
779
780 STEP_IF("test reattempt stack headroom",
781 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
782 st->print_cr("test reattempt stack headroom");
783 reattempt_test_hit_stack_limit(st);
784
785 REATTEMPT_STEP_IF("test reattempt stack headroom, attempt 2",
786 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
787 st->print_cr("test reattempt stack headroom, attempt 2");
788
789 STEP_IF("test missing ResourceMark does not crash",
790 _verbose && TestCrashInErrorHandler == TEST_RESOURCE_MARK_CRASH)
791 stringStream message;
792 message.print("This is a message with no ResourceMark");
793 tty->print_cr("%s", message.as_string());
794
795 // TestUnresponsiveErrorHandler: We want to test both step timeouts and global timeout.
796 // Step to global timeout ratio is 4:1, so in order to be absolutely sure we hit the
797 // global timeout, let's execute the timeout step five times.
798 // See corresponding test in test/runtime/ErrorHandling/TimeoutInErrorHandlingTest.java
799 STEP_IF("setup for test unresponsive error reporting step",
800 _verbose && TestUnresponsiveErrorHandler)
801 // We record reporting_start_time for this test here because we
802 // care about the time spent executing TIMEOUT_TEST_STEP and not
803 // about the time it took us to get here.
804 tty->print_cr("Recording reporting_start_time for TestUnresponsiveErrorHandler.");
805 record_reporting_start_time();
806
807 #define TIMEOUT_TEST_STEP STEP_IF("test unresponsive error reporting step", \
808 _verbose && TestUnresponsiveErrorHandler) \
809 os::infinite_sleep();
810 TIMEOUT_TEST_STEP
811 TIMEOUT_TEST_STEP
812 TIMEOUT_TEST_STEP
813 TIMEOUT_TEST_STEP
814 TIMEOUT_TEST_STEP
815
816 STEP_IF("test safefetch in error handler", _verbose && TestSafeFetchInErrorHandler)
817 // test whether it is safe to use SafeFetch32 in Crash Handler. Test twice
818 // to test that resetting the signal handler works correctly.
819 st->print_cr("Will test SafeFetch...");
820 int* const invalid_pointer = (int*)segfault_address;
821 const int x = 0x76543210;
822 int i1 = SafeFetch32(invalid_pointer, x);
823 int i2 = SafeFetch32(invalid_pointer, x);
824 if (i1 == x && i2 == x) {
825 st->print_cr("SafeFetch OK."); // Correctly deflected and returned default pattern
826 } else {
827 st->print_cr("??");
828 }
829 #endif // ASSERT
830
831 STEP("printing type of error")
832 switch(static_cast<unsigned int>(_id)) {
833 case OOM_MALLOC_ERROR:
834 case OOM_MMAP_ERROR:
835 case OOM_MPROTECT_ERROR:
836 if (_size) {
837 st->print("# Native memory allocation ");
838 st->print((_id == (int)OOM_MALLOC_ERROR) ? "(malloc) failed to allocate " :
839 (_id == (int)OOM_MMAP_ERROR) ? "(mmap) failed to map " :
840 "(mprotect) failed to protect ");
841 jio_snprintf(buf, sizeof(buf), SIZE_FORMAT, _size);
842 st->print("%s", buf);
843 st->print(" bytes.");
844 if (strlen(_detail_msg) > 0) {
845 st->print(" Error detail: ");
846 st->print("%s", _detail_msg);
847 }
848 st->cr();
849 } else {
850 if (strlen(_detail_msg) > 0) {
851 st->print("# ");
852 st->print_cr("%s", _detail_msg);
853 }
854 }
855 // In error file give some solutions
856 if (_verbose) {
857 print_oom_reasons(st);
858 } else {
859 return; // that's enough for the screen
860 }
861 break;
862 case INTERNAL_ERROR:
863 default:
864 break;
865 }
866
867 STEP("printing exception/signal name")
868 st->print_cr("#");
869 st->print("# ");
870 // Is it an OS exception/signal?
871 if (os::exception_name(_id, buf, sizeof(buf))) {
872 st->print("%s", buf);
873 st->print(" (0x%x)", _id); // signal number
874 st->print(" at pc=" PTR_FORMAT, p2i(_pc));
875 if (_siginfo != nullptr && os::signal_sent_by_kill(_siginfo)) {
876 st->print(" (sent by kill)");
877 }
878 } else {
879 if (should_report_bug(_id)) {
880 st->print("Internal Error");
881 } else {
882 st->print("Out of Memory Error");
883 }
884 if (_filename != nullptr && _lineno > 0) {
885 #ifdef PRODUCT
886 // In product mode chop off pathname
887 const char *file = get_filename_only();
888 #else
889 const char *file = _filename;
890 #endif
891 st->print(" (%s:%d)", file, _lineno);
892 } else {
893 st->print(" (0x%x)", _id);
894 }
895 }
896
897 STEP("printing current thread and pid")
898 // process id, thread id
899 st->print(", pid=%d", os::current_process_id());
900 st->print(", tid=" UINTX_FORMAT, os::current_thread_id());
901 st->cr();
902
903 STEP_IF("printing error message", should_report_bug(_id)) // already printed the message.
904 // error message
905 if (strlen(_detail_msg) > 0) {
906 st->print_cr("# %s: %s", _message ? _message : "Error", _detail_msg);
907 } else if (_message) {
908 st->print_cr("# Error: %s", _message);
909 }
910
911 STEP("printing Java version string")
912 report_vm_version(st, buf, sizeof(buf));
913
914 STEP_IF("printing problematic frame", _context != nullptr)
915 // Print current frame if we have a context (i.e. it's a crash)
916 st->print_cr("# Problematic frame:");
917 st->print("# ");
918 frame fr = os::fetch_frame_from_context(_context);
919 fr.print_on_error(st, buf, sizeof(buf));
920 st->cr();
921 st->print_cr("#");
922
923 STEP("printing core file information")
924 st->print("# ");
925 if (CreateCoredumpOnCrash) {
926 if (coredump_status) {
927 st->print("Core dump will be written. Default location: %s", coredump_message);
928 } else {
929 st->print("No core dump will be written. %s", coredump_message);
930 }
931 } else {
932 st->print("CreateCoredumpOnCrash turned off, no core file dumped");
933 }
934 st->cr();
935 st->print_cr("#");
936
937 JFR_ONLY(STEP("printing jfr information"))
938 JFR_ONLY(Jfr::on_vm_error_report(st);)
939
940 STEP_IF("printing bug submit message", should_submit_bug_report(_id) && _verbose)
941 print_bug_submit_message(st, _thread);
942
943 STEP_IF("printing summary", _verbose)
944 st->cr();
945 st->print_cr("--------------- S U M M A R Y ------------");
946 st->cr();
947
948 STEP_IF("printing VM option summary", _verbose)
949 // VM options
950 Arguments::print_summary_on(st);
951 st->cr();
952
953 STEP_IF("printing summary machine and OS info", _verbose)
954 os::print_summary_info(st, buf, sizeof(buf));
955
956 STEP_IF("printing date and time", _verbose)
957 os::print_date_and_time(st, buf, sizeof(buf));
958
959 STEP_IF("printing thread", _verbose)
960 st->cr();
961 st->print_cr("--------------- T H R E A D ---------------");
962 st->cr();
963
964 STEP_IF("printing current thread", _verbose)
965 // current thread
966 if (_thread) {
967 st->print("Current thread (" PTR_FORMAT "): ", p2i(_thread));
968 _thread->print_on_error(st, buf, sizeof(buf));
969 st->cr();
970 } else {
971 st->print_cr("Current thread is native thread");
972 }
973 st->cr();
974
975 STEP_IF("printing current compile task",
976 _verbose && _thread != nullptr && _thread->is_Compiler_thread())
977 CompilerThread* t = (CompilerThread*)_thread;
978 if (t->task()) {
979 st->cr();
980 st->print_cr("Current CompileTask:");
981 t->task()->print_line_on_error(st, buf, sizeof(buf));
982 st->cr();
983 }
984
985 STEP_IF("printing stack bounds", _verbose)
986 st->print("Stack: ");
987
988 address stack_top;
989 size_t stack_size;
990
991 if (_thread) {
992 stack_top = _thread->stack_base();
993 stack_size = _thread->stack_size();
994 } else {
995 os::current_stack_base_and_size(&stack_top, &stack_size);
996 }
997
998 address stack_bottom = stack_top - stack_size;
999 st->print("[" PTR_FORMAT "," PTR_FORMAT "]", p2i(stack_bottom), p2i(stack_top));
1000
1001 frame fr = _context ? os::fetch_frame_from_context(_context)
1002 : os::current_frame();
1003
1004 if (fr.sp()) {
1005 st->print(", sp=" PTR_FORMAT, p2i(fr.sp()));
1006 size_t free_stack_size = pointer_delta(fr.sp(), stack_bottom, 1024);
1007 st->print(", free space=" SIZE_FORMAT "k", free_stack_size);
1008 }
1009
1010 st->cr();
1011
1012 STEP_IF("printing native stack (with source info)", _verbose)
1013 if (os::platform_print_native_stack(st, _context, buf, sizeof(buf), lastpc)) {
1014 // We have printed the native stack in platform-specific code
1015 // Windows/x64 needs special handling.
1016 // Stack walking may get stuck. Try to find the calling code.
1017 if (lastpc != nullptr) {
1018 const char* name = find_code_name(lastpc);
1019 if (name != nullptr) {
1020 st->print_cr("The last pc belongs to %s (printed below).", name);
1021 }
1022 }
1023 } else {
1024 frame fr = _context ? os::fetch_frame_from_context(_context)
1025 : os::current_frame();
1026
1027 print_native_stack(st, fr, _thread, true, -1, buf, sizeof(buf));
1028 _print_native_stack_used = true;
1029 }
1030
1031 REATTEMPT_STEP_IF("retry printing native stack (no source info)", _verbose)
1032 st->cr();
1033 st->print_cr("Retrying call stack printing without source information...");
1034 frame fr = _context ? os::fetch_frame_from_context(_context) : os::current_frame();
1035 print_native_stack(st, fr, _thread, false, -1, buf, sizeof(buf));
1036 _print_native_stack_used = true;
1037
1038 STEP_IF("printing Java stack", _verbose && _thread && _thread->is_Java_thread())
1039 if (_verbose && _thread && _thread->is_Java_thread()) {
1040 print_stack_trace(st, JavaThread::cast(_thread), buf, sizeof(buf));
1041 }
1042
1043 STEP_IF("printing target Java thread stack",
1044 _verbose && _thread != nullptr && (_thread->is_Named_thread()))
1045 // printing Java thread stack trace if it is involved in GC crash
1046 Thread* thread = ((NamedThread *)_thread)->processed_thread();
1047 if (thread != nullptr && thread->is_Java_thread()) {
1048 JavaThread* jt = JavaThread::cast(thread);
1049 st->print_cr("JavaThread " PTR_FORMAT " (nid = %d) was being processed", p2i(jt), jt->osthread()->thread_id());
1050 print_stack_trace(st, jt, buf, sizeof(buf), true);
1051 }
1052
1053 STEP_IF("printing siginfo", _verbose && _siginfo != nullptr)
1054 // signal no, signal code, address that caused the fault
1055 st->cr();
1056 os::print_siginfo(st, _siginfo);
1057 st->cr();
1058
1059 STEP_IF("CDS archive access warning", _verbose && _siginfo != nullptr)
1060 // Print an explicit hint if we crashed on access to the CDS archive.
1061 check_failing_cds_access(st, _siginfo);
1062 st->cr();
1063
1064 #if defined(COMPILER1) || defined(COMPILER2)
1065 STEP_IF("printing pending compilation failure",
1066 _verbose && _thread != nullptr && _thread->is_Compiler_thread())
1067 CompilationFailureInfo::print_pending_compilation_failure(st);
1068 #endif
1069
1070 STEP_IF("printing registers", _verbose && _context != nullptr)
1071 // printing registers
1072 os::print_context(st, _context);
1073 st->cr();
1074
1075 STEP_IF("printing register info",
1076 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1077 continuation = 0;
1078 ResourceMark rm(_thread);
1079 st->print_cr("Register to memory mapping:");
1080 st->cr();
1081 os::print_register_info(st, _context, continuation);
1082 st->cr();
1083
1084 REATTEMPT_STEP_IF("printing register info, attempt 2",
1085 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1086 ResourceMark rm(_thread);
1087 os::print_register_info(st, _context, continuation);
1088 st->cr();
1089
1090 REATTEMPT_STEP_IF("printing register info, attempt 3",
1091 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1092 ResourceMark rm(_thread);
1093 os::print_register_info(st, _context, continuation);
1094 st->cr();
1095
1096 STEP_IF("printing top of stack, instructions near pc", _verbose && _context != nullptr)
1097 // printing top of stack, instructions near pc
1098 os::print_tos_pc(st, _context);
1099 st->cr();
1100
1101 STEP_IF("inspecting top of stack",
1102 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1103 continuation = 0;
1104 ResourceMark rm(_thread);
1105 st->print_cr("Stack slot to memory mapping:");
1106 st->cr();
1107 print_stack_location(st, _context, continuation);
1108 st->cr();
1109
1110 REATTEMPT_STEP_IF("inspecting top of stack, attempt 2",
1111 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1112 ResourceMark rm(_thread);
1113 print_stack_location(st, _context, continuation);
1114 st->cr();
1115
1116 REATTEMPT_STEP_IF("inspecting top of stack, attempt 3",
1117 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1118 ResourceMark rm(_thread);
1119 print_stack_location(st, _context, continuation);
1120 st->cr();
1121
1122 STEP_IF("printing lock stack", _verbose && _thread != nullptr && _thread->is_Java_thread() && (LockingMode == LM_LIGHTWEIGHT));
1123 st->print_cr("Lock stack of current Java thread (top to bottom):");
1124 JavaThread::cast(_thread)->lock_stack().print_on(st);
1125 st->cr();
1126
1127 STEP_IF("printing code blobs if possible", _verbose)
1128 const int printed_capacity = max_error_log_print_code;
1129 address printed[printed_capacity];
1130 printed[0] = nullptr;
1131 int printed_len = 0;
1132 // Even though ErrorLogPrintCodeLimit is ranged checked
1133 // during argument parsing, there's no way to prevent it
1134 // subsequently (i.e., after parsing) being set to a
1135 // value outside the range.
1136 int limit = MIN2(ErrorLogPrintCodeLimit, printed_capacity);
1137 if (limit > 0) {
1138 // Check if a pc was found by native stack trace above.
1139 if (lastpc != nullptr) {
1140 if (print_code(st, _thread, lastpc, true, printed, printed_capacity)) {
1141 printed_len++;
1142 }
1143 }
1144
1145 // Scan the native stack
1146 if (!_print_native_stack_used) {
1147 // Only try to print code of the crashing frame since
1148 // the native stack cannot be walked with next_frame.
1149 if (print_code(st, _thread, _pc, true, printed, printed_capacity)) {
1150 printed_len++;
1151 }
1152 } else {
1153 frame fr = _context ? os::fetch_frame_from_context(_context)
1154 : os::current_frame();
1155 while (printed_len < limit && fr.pc() != nullptr) {
1156 if (print_code(st, _thread, fr.pc(), fr.pc() == _pc, printed, printed_capacity)) {
1157 printed_len++;
1158 }
1159 fr = next_frame(fr, _thread);
1160 }
1161 }
1162
1163 // Scan the Java stack
1164 if (_thread != nullptr && _thread->is_Java_thread()) {
1165 JavaThread* jt = JavaThread::cast(_thread);
1166 if (jt->has_last_Java_frame()) {
1167 for (StackFrameStream sfs(jt, true /* update */, true /* process_frames */); printed_len < limit && !sfs.is_done(); sfs.next()) {
1168 address pc = sfs.current()->pc();
1169 if (print_code(st, _thread, pc, pc == _pc, printed, printed_capacity)) {
1170 printed_len++;
1171 }
1172 }
1173 }
1174 }
1175 }
1176
1177 STEP_IF("printing VM operation", _verbose && _thread != nullptr && _thread->is_VM_thread())
1178 VMThread* t = (VMThread*)_thread;
1179 VM_Operation* op = t->vm_operation();
1180 if (op) {
1181 op->print_on_error(st);
1182 st->cr();
1183 st->cr();
1184 }
1185
1186 STEP_IF("printing registered callbacks", _verbose && _thread != nullptr);
1187 for (VMErrorCallback* callback = _thread->_vm_error_callbacks;
1188 callback != nullptr;
1189 callback = callback->_next) {
1190 callback->call(st);
1191 st->cr();
1192 }
1193
1194 STEP_IF("printing process", _verbose)
1195 st->cr();
1196 st->print_cr("--------------- P R O C E S S ---------------");
1197 st->cr();
1198
1199 STEP_IF("printing user info", ExtensiveErrorReports && _verbose)
1200 os::print_user_info(st);
1201
1202 STEP_IF("printing all threads", _verbose && _thread != nullptr)
1203 // all threads
1204 Threads::print_on_error(st, _thread, buf, sizeof(buf));
1205 st->cr();
1206
1207 STEP_IF("printing VM state", _verbose)
1208 // Safepoint state
1209 st->print("VM state: ");
1210
1211 if (SafepointSynchronize::is_synchronizing()) st->print("synchronizing");
1212 else if (SafepointSynchronize::is_at_safepoint()) st->print("at safepoint");
1213 else st->print("not at safepoint");
1214
1215 // Also see if error occurred during initialization or shutdown
1216 if (!Universe::is_fully_initialized()) {
1217 st->print(" (not fully initialized)");
1218 } else if (VM_Exit::vm_exited()) {
1219 st->print(" (shutting down)");
1220 } else {
1221 st->print(" (normal execution)");
1222 }
1223 st->cr();
1224 st->cr();
1225
1226 STEP_IF("printing owned locks on error", _verbose)
1227 // mutexes/monitors that currently have an owner
1228 print_owned_locks_on_error(st);
1229 st->cr();
1230
1231 STEP_IF("printing number of OutOfMemoryError and StackOverflow exceptions",
1232 _verbose && Exceptions::has_exception_counts())
1233 st->print_cr("OutOfMemory and StackOverflow Exception counts:");
1234 Exceptions::print_exception_counts_on_error(st);
1235 st->cr();
1236
1237 #ifdef _LP64
1238 STEP_IF("printing compressed oops mode", _verbose && UseCompressedOops)
1239 CompressedOops::print_mode(st);
1240 st->cr();
1241
1242 STEP_IF("printing compressed klass pointers mode", _verbose && UseCompressedClassPointers)
1243 CDS_ONLY(MetaspaceShared::print_on(st);)
1244 Metaspace::print_compressed_class_space(st);
1245 CompressedKlassPointers::print_mode(st);
1246 st->cr();
1247 #endif
1248
1249 STEP_IF("printing heap information", _verbose)
1250 GCLogPrecious::print_on_error(st);
1251
1252 if (Universe::heap() != nullptr) {
1253 Universe::heap()->print_on_error(st);
1254 st->cr();
1255 }
1256
1257 if (Universe::is_fully_initialized()) {
1258 st->print_cr("Polling page: " PTR_FORMAT, p2i(SafepointMechanism::get_polling_page()));
1259 st->cr();
1260 }
1261
1262 STEP_IF("printing metaspace information", _verbose && Universe::is_fully_initialized())
1263 st->print_cr("Metaspace:");
1264 MetaspaceUtils::print_basic_report(st, 0);
1265
1266 STEP_IF("printing code cache information", _verbose && Universe::is_fully_initialized())
1267 // print code cache information before vm abort
1268 CodeCache::print_summary(st);
1269 st->cr();
1270
1271 STEP_IF("printing ring buffers", _verbose)
1272 Events::print_all(st);
1273 st->cr();
1274
1275 STEP_IF("printing dynamic libraries", _verbose)
1276 // dynamic libraries, or memory map
1277 os::print_dll_info(st);
1278 st->cr();
1279
1280 STEP_IF("printing native decoder state", _verbose)
1281 Decoder::print_state_on(st);
1282 st->cr();
1283
1284 STEP_IF("printing VM options", _verbose)
1285 // VM options
1286 Arguments::print_on(st);
1287 st->cr();
1288
1289 STEP_IF("printing flags", _verbose)
1290 JVMFlag::printFlags(
1291 st,
1292 true, // with comments
1293 false, // no ranges
1294 true); // skip defaults
1295 st->cr();
1296
1297 STEP_IF("printing warning if internal testing API used", WhiteBox::used())
1298 st->print_cr("Unsupported internal testing APIs have been used.");
1299 st->cr();
1300
1301 STEP_IF("printing log configuration", _verbose)
1302 st->print_cr("Logging:");
1303 LogConfiguration::describe_current_configuration(st);
1304 st->cr();
1305
1306 STEP_IF("printing all environment variables", _verbose)
1307 os::print_environment_variables(st, env_list);
1308 st->cr();
1309
1310 STEP_IF("printing locale settings", _verbose)
1311 os::print_active_locale(st);
1312 st->cr();
1313
1314 STEP_IF("printing signal handlers", _verbose)
1315 os::print_signal_handlers(st, buf, sizeof(buf));
1316 st->cr();
1317
1318 STEP_IF("Native Memory Tracking", _verbose)
1319 MemTracker::error_report(st);
1320 st->cr();
1321
1322 STEP_IF("printing periodic trim state", _verbose)
1323 NativeHeapTrimmer::print_state(st);
1324 st->cr();
1325
1326 STEP_IF("printing system", _verbose)
1327 st->print_cr("--------------- S Y S T E M ---------------");
1328 st->cr();
1329
1330 STEP_IF("printing OS information", _verbose)
1331 os::print_os_info(st);
1332 st->cr();
1333
1334 STEP_IF("printing CPU info", _verbose)
1335 os::print_cpu_info(st, buf, sizeof(buf));
1336 st->cr();
1337
1338 STEP_IF("printing memory info", _verbose)
1339 os::print_memory_info(st);
1340 st->cr();
1341
1342 STEP_IF("printing internal vm info", _verbose)
1343 st->print_cr("vm_info: %s", VM_Version::internal_vm_info_string());
1344 st->cr();
1345
1346 // print a defined marker to show that error handling finished correctly.
1347 STEP_IF("printing end marker", _verbose)
1348 st->print_cr("END.");
1349
1350 END
1351
1352 # undef BEGIN
1353 # undef STEP_IF
1354 # undef STEP
1355 # undef REATTEMPT_STEP_IF
1356 # undef END
1357 }
1358
1359 // Report for the vm_info_cmd. This prints out the information above omitting
1360 // crash and thread specific information. If output is added above, it should be added
1361 // here also, if it is safe to call during a running process.
1362 void VMError::print_vm_info(outputStream* st) {
1363
1364 char buf[O_BUFLEN];
1365 os::prepare_native_symbols();
1366
1367 report_vm_version(st, buf, sizeof(buf));
1368
1369 // STEP("printing summary")
1370
1371 st->cr();
1372 st->print_cr("--------------- S U M M A R Y ------------");
1373 st->cr();
1374
1375 // STEP("printing VM option summary")
1376
1377 // VM options
1378 Arguments::print_summary_on(st);
1379 st->cr();
1380
1381 // STEP("printing summary machine and OS info")
1382
1383 os::print_summary_info(st, buf, sizeof(buf));
1384
1385 // STEP("printing date and time")
1386
1387 os::print_date_and_time(st, buf, sizeof(buf));
1388
1389 // Skip: STEP("printing thread")
1390
1391 // STEP("printing process")
1392
1393 st->cr();
1394 st->print_cr("--------------- P R O C E S S ---------------");
1395 st->cr();
1396
1397 // STEP("printing number of OutOfMemoryError and StackOverflow exceptions")
1398
1399 if (Exceptions::has_exception_counts()) {
1400 st->print_cr("OutOfMemory and StackOverflow Exception counts:");
1401 Exceptions::print_exception_counts_on_error(st);
1402 st->cr();
1403 }
1404
1405 #ifdef _LP64
1406 // STEP("printing compressed oops mode")
1407 if (UseCompressedOops) {
1408 CompressedOops::print_mode(st);
1409 st->cr();
1410 }
1411
1412 // STEP("printing compressed class ptrs mode")
1413 if (UseCompressedClassPointers) {
1414 CDS_ONLY(MetaspaceShared::print_on(st);)
1415 Metaspace::print_compressed_class_space(st);
1416 CompressedKlassPointers::print_mode(st);
1417 st->cr();
1418 }
1419 #endif
1420
1421 // STEP("printing heap information")
1422
1423 if (Universe::is_fully_initialized()) {
1424 MutexLocker hl(Heap_lock);
1425 GCLogPrecious::print_on_error(st);
1426 Universe::heap()->print_on_error(st);
1427 st->cr();
1428 st->print_cr("Polling page: " PTR_FORMAT, p2i(SafepointMechanism::get_polling_page()));
1429 st->cr();
1430 }
1431
1432 // STEP("printing metaspace information")
1433
1434 if (Universe::is_fully_initialized()) {
1435 st->print_cr("Metaspace:");
1436 MetaspaceUtils::print_basic_report(st, 0);
1437 }
1438
1439 // STEP("printing code cache information")
1440
1441 if (Universe::is_fully_initialized()) {
1442 // print code cache information before vm abort
1443 CodeCache::print_summary(st);
1444 st->cr();
1445 }
1446
1447 // STEP("printing ring buffers")
1448
1449 Events::print_all(st);
1450 st->cr();
1451
1452 // STEP("printing dynamic libraries")
1453
1454 // dynamic libraries, or memory map
1455 os::print_dll_info(st);
1456 st->cr();
1457
1458 // STEP("printing VM options")
1459
1460 // VM options
1461 Arguments::print_on(st);
1462 st->cr();
1463
1464 // STEP("printing warning if internal testing API used")
1465
1466 if (WhiteBox::used()) {
1467 st->print_cr("Unsupported internal testing APIs have been used.");
1468 st->cr();
1469 }
1470
1471 // STEP("printing log configuration")
1472 st->print_cr("Logging:");
1473 LogConfiguration::describe(st);
1474 st->cr();
1475
1476 // STEP("printing all environment variables")
1477
1478 os::print_environment_variables(st, env_list);
1479 st->cr();
1480
1481 // STEP("printing locale settings")
1482
1483 os::print_active_locale(st);
1484 st->cr();
1485
1486
1487 // STEP("printing signal handlers")
1488
1489 os::print_signal_handlers(st, buf, sizeof(buf));
1490 st->cr();
1491
1492 // STEP("Native Memory Tracking")
1493
1494 MemTracker::error_report(st);
1495 st->cr();
1496
1497 // STEP("printing periodic trim state")
1498 NativeHeapTrimmer::print_state(st);
1499 st->cr();
1500
1501
1502 // STEP("printing system")
1503 st->print_cr("--------------- S Y S T E M ---------------");
1504 st->cr();
1505
1506 // STEP("printing OS information")
1507
1508 os::print_os_info(st);
1509 st->cr();
1510
1511 // STEP("printing CPU info")
1512
1513 os::print_cpu_info(st, buf, sizeof(buf));
1514 st->cr();
1515
1516 // STEP("printing memory info")
1517
1518 os::print_memory_info(st);
1519 st->cr();
1520
1521 // STEP("printing internal vm info")
1522
1523 st->print_cr("vm_info: %s", VM_Version::internal_vm_info_string());
1524 st->cr();
1525
1526 // print a defined marker to show that error handling finished correctly.
1527 // STEP("printing end marker")
1528
1529 st->print_cr("END.");
1530 }
1531
1532 /** Expand a pattern into a buffer starting at pos and open a file using constructed path */
1533 static int expand_and_open(const char* pattern, bool overwrite_existing, char* buf, size_t buflen, size_t pos) {
1534 int fd = -1;
1535 int mode = O_RDWR | O_CREAT;
1536 if (overwrite_existing) {
1537 mode |= O_TRUNC;
1538 } else {
1539 mode |= O_EXCL;
1540 }
1541 if (Arguments::copy_expand_pid(pattern, strlen(pattern), &buf[pos], buflen - pos)) {
1542 fd = open(buf, mode, 0666);
1543 }
1544 return fd;
1545 }
1546
1547 /**
1548 * Construct file name for a log file and return it's file descriptor.
1549 * Name and location depends on pattern, default_pattern params and access
1550 * permissions.
1551 */
1552 int VMError::prepare_log_file(const char* pattern, const char* default_pattern, bool overwrite_existing, char* buf, size_t buflen) {
1553 int fd = -1;
1554
1555 // If possible, use specified pattern to construct log file name
1556 if (pattern != nullptr) {
1557 fd = expand_and_open(pattern, overwrite_existing, buf, buflen, 0);
1558 }
1559
1560 // Either user didn't specify, or the user's location failed,
1561 // so use the default name in the current directory
1562 if (fd == -1) {
1563 const char* cwd = os::get_current_directory(buf, buflen);
1564 if (cwd != nullptr) {
1565 size_t pos = strlen(cwd);
1566 int fsep_len = jio_snprintf(&buf[pos], buflen-pos, "%s", os::file_separator());
1567 pos += fsep_len;
1568 if (fsep_len > 0) {
1569 fd = expand_and_open(default_pattern, overwrite_existing, buf, buflen, pos);
1570 }
1571 }
1572 }
1573
1574 // try temp directory if it exists.
1575 if (fd == -1) {
1576 const char* tmpdir = os::get_temp_directory();
1577 if (tmpdir != nullptr && strlen(tmpdir) > 0) {
1578 int pos = jio_snprintf(buf, buflen, "%s%s", tmpdir, os::file_separator());
1579 if (pos > 0) {
1580 fd = expand_and_open(default_pattern, overwrite_existing, buf, buflen, pos);
1581 }
1582 }
1583 }
1584
1585 return fd;
1586 }
1587
1588 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo,
1589 void* context, const char* detail_fmt, ...)
1590 {
1591 va_list detail_args;
1592 va_start(detail_args, detail_fmt);
1593 report_and_die(sig, nullptr, detail_fmt, detail_args, thread, pc, siginfo, context, nullptr, 0, 0);
1594 va_end(detail_args);
1595 }
1596
1597 void VMError::report_and_die(Thread* thread, void* context, const char* filename, int lineno, const char* message,
1598 const char* detail_fmt, ...) {
1599 va_list detail_args;
1600 va_start(detail_args, detail_fmt);
1601 report_and_die(thread, context, filename, lineno, message, detail_fmt, detail_args);
1602 va_end(detail_args);
1603 }
1604
1605 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo, void* context)
1606 {
1607 report_and_die(thread, sig, pc, siginfo, context, "%s", "");
1608 }
1609
1610 void VMError::report_and_die(Thread* thread, void* context, const char* filename, int lineno, const char* message,
1611 const char* detail_fmt, va_list detail_args)
1612 {
1613 report_and_die(INTERNAL_ERROR, message, detail_fmt, detail_args, thread, nullptr, nullptr, context, filename, lineno, 0);
1614 }
1615
1616 void VMError::report_and_die(Thread* thread, const char* filename, int lineno, size_t size,
1617 VMErrorType vm_err_type, const char* detail_fmt, va_list detail_args) {
1618 report_and_die(vm_err_type, nullptr, detail_fmt, detail_args, thread, nullptr, nullptr, nullptr, filename, lineno, size);
1619 }
1620
1621 void VMError::report_and_die(int id, const char* message, const char* detail_fmt, va_list detail_args,
1622 Thread* thread, address pc, void* siginfo, void* context, const char* filename,
1623 int lineno, size_t size)
1624 {
1625 // A single scratch buffer to be used from here on.
1626 // Do not rely on it being preserved across function calls.
1627 static char buffer[O_BUFLEN];
1628
1629 // File descriptor to tty to print an error summary to.
1630 // Hard wired to stdout; see JDK-8215004 (compatibility concerns).
1631 static const int fd_out = 1; // stdout
1632
1633 // File descriptor to the error log file.
1634 static int fd_log = -1;
1635
1636 #ifdef CAN_SHOW_REGISTERS_ON_ASSERT
1637 // Disarm assertion poison page, since from this point on we do not need this mechanism anymore and it may
1638 // cause problems in error handling during native OOM, see JDK-8227275.
1639 disarm_assert_poison();
1640 #endif
1641
1642 // Use local fdStream objects only. Do not use global instances whose initialization
1643 // relies on dynamic initialization (see JDK-8214975). Do not rely on these instances
1644 // to carry over into recursions or invocations from other threads.
1645 fdStream out(fd_out);
1646 out.set_scratch_buffer(buffer, sizeof(buffer));
1647
1648 // Depending on the re-entrance depth at this point, fd_log may be -1 or point to an open hs-err file.
1649 fdStream log(fd_log);
1650 log.set_scratch_buffer(buffer, sizeof(buffer));
1651
1652 // How many errors occurred in error handler when reporting first_error.
1653 static int recursive_error_count;
1654
1655 // We will first print a brief message to standard out (verbose = false),
1656 // then save detailed information in log file (verbose = true).
1657 static bool out_done = false; // done printing to standard out
1658 static bool log_done = false; // done saving error log
1659
1660 intptr_t mytid = os::current_thread_id();
1661 if (_first_error_tid == -1 &&
1662 Atomic::cmpxchg(&_first_error_tid, (intptr_t)-1, mytid) == -1) {
1663
1664 if (SuppressFatalErrorMessage) {
1665 os::abort(CreateCoredumpOnCrash);
1666 }
1667
1668 // Initialize time stamps to use the same base.
1669 out.time_stamp().update_to(1);
1670 log.time_stamp().update_to(1);
1671
1672 _id = id;
1673 _message = message;
1674 _thread = thread;
1675 _pc = pc;
1676 _siginfo = siginfo;
1677 _context = context;
1678 _filename = filename;
1679 _lineno = lineno;
1680 _size = size;
1681 jio_vsnprintf(_detail_msg, sizeof(_detail_msg), detail_fmt, detail_args);
1682
1683 reporting_started();
1684 if (!TestUnresponsiveErrorHandler) {
1685 // Record reporting_start_time unless we're running the
1686 // TestUnresponsiveErrorHandler test. For that test we record
1687 // reporting_start_time at the beginning of the test.
1688 record_reporting_start_time();
1689 } else {
1690 out.print_raw_cr("Delaying recording reporting_start_time for TestUnresponsiveErrorHandler.");
1691 }
1692
1693 if (ShowMessageBoxOnError || PauseAtExit) {
1694 show_message_box(buffer, sizeof(buffer));
1695
1696 // User has asked JVM to abort. Reset ShowMessageBoxOnError so the
1697 // WatcherThread can kill JVM if the error handler hangs.
1698 ShowMessageBoxOnError = false;
1699 }
1700
1701 os::check_dump_limit(buffer, sizeof(buffer));
1702
1703 // reset signal handlers or exception filter; make sure recursive crashes
1704 // are handled properly.
1705 install_secondary_signal_handler();
1706 } else {
1707 // This is not the first error, see if it happened in a different thread
1708 // or in the same thread during error reporting.
1709 if (_first_error_tid != mytid) {
1710 if (!SuppressFatalErrorMessage) {
1711 char msgbuf[64];
1712 jio_snprintf(msgbuf, sizeof(msgbuf),
1713 "[thread " INTX_FORMAT " also had an error]",
1714 mytid);
1715 out.print_raw_cr(msgbuf);
1716 }
1717
1718 // Error reporting is not MT-safe, nor can we let the current thread
1719 // proceed, so we block it.
1720 os::infinite_sleep();
1721
1722 } else {
1723 if (recursive_error_count++ > 30) {
1724 if (!SuppressFatalErrorMessage) {
1725 out.print_raw_cr("[Too many errors, abort]");
1726 }
1727 os::die();
1728 }
1729
1730 if (SuppressFatalErrorMessage) {
1731 // If we already hit a secondary error during abort, then calling
1732 // it again is likely to hit another one. But eventually, if we
1733 // don't deadlock somewhere, we will call os::die() above.
1734 os::abort(CreateCoredumpOnCrash);
1735 }
1736
1737 outputStream* const st = log.is_open() ? &log : &out;
1738 st->cr();
1739
1740 // Timeout handling.
1741 if (_step_did_timeout) {
1742 // The current step had a timeout. Lets continue reporting with the next step.
1743 st->print_raw("[timeout occurred during error reporting in step \"");
1744 st->print_raw(_current_step_info);
1745 st->print_cr("\"] after " INT64_FORMAT " s.",
1746 (int64_t)
1747 ((get_current_timestamp() - _step_start_time) / TIMESTAMP_TO_SECONDS_FACTOR));
1748 } else if (_reporting_did_timeout) {
1749 // We hit ErrorLogTimeout. Reporting will stop altogether. Let's wrap things
1750 // up, the process is about to be stopped by the WatcherThread.
1751 st->print_cr("------ Timeout during error reporting after " INT64_FORMAT " s. ------",
1752 (int64_t)
1753 ((get_current_timestamp() - _reporting_start_time) / TIMESTAMP_TO_SECONDS_FACTOR));
1754 st->flush();
1755 // Watcherthread is about to call os::die. Lets just wait.
1756 os::infinite_sleep();
1757 } else {
1758 // A secondary error happened. Print brief information, but take care, since crashing
1759 // here would just recurse endlessly.
1760 // Any information (signal, context, siginfo etc) printed here should use the function
1761 // arguments, not the information stored in *this, since those describe the primary crash.
1762 static char tmp[256]; // cannot use global scratch buffer
1763 // Note: this string does get parsed by a number of jtreg tests,
1764 // see hotspot/jtreg/runtime/ErrorHandling.
1765 st->print("[error occurred during error reporting (%s), id 0x%x",
1766 _current_step_info, id);
1767 if (os::exception_name(id, tmp, sizeof(tmp))) {
1768 st->print(", %s (0x%x) at pc=" PTR_FORMAT, tmp, id, p2i(pc));
1769 } else {
1770 if (should_report_bug(id)) {
1771 st->print(", Internal Error (%s:%d)",
1772 filename == nullptr ? "??" : filename, lineno);
1773 } else {
1774 st->print(", Out of Memory Error (%s:%d)",
1775 filename == nullptr ? "??" : filename, lineno);
1776 }
1777 }
1778 st->print_cr("]");
1779 if (ErrorLogSecondaryErrorDetails) {
1780 static bool recursed = false;
1781 if (!recursed) {
1782 recursed = true;
1783 // Print even more information for secondary errors. This may generate a lot of output
1784 // and possibly disturb error reporting, therefore its optional and only available in debug builds.
1785 if (siginfo != nullptr) {
1786 st->print("[");
1787 os::print_siginfo(st, siginfo);
1788 st->print_cr("]");
1789 }
1790 st->print("[stack: ");
1791 frame fr = context ? os::fetch_frame_from_context(context) : os::current_frame();
1792 // Subsequent secondary errors build up stack; to avoid flooding the hs-err file with irrelevant
1793 // call stacks, limit the stack we print here (we are only interested in what happened before the
1794 // last assert/fault).
1795 const int max_stack_size = 15;
1796 print_native_stack(st, fr, _thread, true, max_stack_size, tmp, sizeof(tmp));
1797 st->print_cr("]");
1798 } // !recursed
1799 recursed = false; // Note: reset outside !recursed
1800 }
1801 }
1802 }
1803 }
1804
1805 // Part 1: print an abbreviated version (the '#' section) to stdout.
1806 if (!out_done) {
1807 // Suppress this output if we plan to print Part 2 to stdout too.
1808 // No need to have the "#" section twice.
1809 if (!(ErrorFileToStdout && out.fd() == 1)) {
1810 report(&out, false);
1811 }
1812
1813 out_done = true;
1814
1815 _current_step = 0;
1816 _current_step_info = "";
1817 }
1818
1819 // Part 2: print a full error log file (optionally to stdout or stderr).
1820 // print to error log file
1821 if (!log_done) {
1822 // see if log file is already open
1823 if (!log.is_open()) {
1824 // open log file
1825 if (ErrorFileToStdout) {
1826 fd_log = 1;
1827 } else if (ErrorFileToStderr) {
1828 fd_log = 2;
1829 } else {
1830 fd_log = prepare_log_file(ErrorFile, "hs_err_pid%p.log", true,
1831 buffer, sizeof(buffer));
1832 if (fd_log != -1) {
1833 out.print_raw("# An error report file with more information is saved as:\n# ");
1834 out.print_raw_cr(buffer);
1835 } else {
1836 out.print_raw_cr("# Can not save log file, dump to screen..");
1837 fd_log = 1;
1838 }
1839 }
1840 log.set_fd(fd_log);
1841 }
1842
1843 report(&log, true);
1844 log_done = true;
1845 _current_step = 0;
1846 _current_step_info = "";
1847
1848 if (fd_log > 3) {
1849 ::close(fd_log);
1850 fd_log = -1;
1851 }
1852
1853 log.set_fd(-1);
1854 }
1855
1856 JFR_ONLY(Jfr::on_vm_shutdown(true);)
1857
1858 if (PrintNMTStatistics) {
1859 fdStream fds(fd_out);
1860 MemTracker::final_report(&fds);
1861 }
1862
1863 static bool skip_replay = ReplayCompiles && !ReplayReduce; // Do not overwrite file during replay
1864 if (DumpReplayDataOnError && _thread && _thread->is_Compiler_thread() && !skip_replay) {
1865 skip_replay = true;
1866 ciEnv* env = ciEnv::current();
1867 if (env != nullptr) {
1868 const bool overwrite = false; // We do not overwrite an existing replay file.
1869 int fd = prepare_log_file(ReplayDataFile, "replay_pid%p.log", overwrite, buffer, sizeof(buffer));
1870 if (fd != -1) {
1871 FILE* replay_data_file = os::fdopen(fd, "w");
1872 if (replay_data_file != nullptr) {
1873 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1874 env->dump_replay_data_unsafe(&replay_data_stream);
1875 out.print_raw("#\n# Compiler replay data is saved as:\n# ");
1876 out.print_raw_cr(buffer);
1877 } else {
1878 int e = errno;
1879 out.print_raw("#\n# Can't open file to dump replay data. Error: ");
1880 out.print_raw_cr(os::strerror(e));
1881 close(fd);
1882 }
1883 }
1884 }
1885 }
1886
1887 #if INCLUDE_JVMCI
1888 if (JVMCI::fatal_log_filename() != nullptr) {
1889 out.print_raw("#\n# The JVMCI shared library error report file is saved as:\n# ");
1890 out.print_raw_cr(JVMCI::fatal_log_filename());
1891 }
1892 #endif
1893
1894 static bool skip_bug_url = !should_submit_bug_report(_id);
1895 if (!skip_bug_url) {
1896 skip_bug_url = true;
1897
1898 out.print_raw_cr("#");
1899 print_bug_submit_message(&out, _thread);
1900 }
1901
1902 static bool skip_OnError = false;
1903 if (!skip_OnError && OnError && OnError[0]) {
1904 skip_OnError = true;
1905
1906 // Flush output and finish logs before running OnError commands.
1907 ostream_abort();
1908
1909 out.print_raw_cr("#");
1910 out.print_raw ("# -XX:OnError=\"");
1911 out.print_raw (OnError);
1912 out.print_raw_cr("\"");
1913
1914 char* cmd;
1915 const char* ptr = OnError;
1916 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != nullptr){
1917 out.print_raw ("# Executing ");
1918 #if defined(LINUX) || defined(_ALLBSD_SOURCE)
1919 out.print_raw ("/bin/sh -c ");
1920 #elif defined(_WINDOWS)
1921 out.print_raw ("cmd /C ");
1922 #endif
1923 out.print_raw ("\"");
1924 out.print_raw (cmd);
1925 out.print_raw_cr("\" ...");
1926
1927 if (os::fork_and_exec(cmd) < 0) {
1928 out.print_cr("os::fork_and_exec failed: %s (%s=%d)",
1929 os::strerror(errno), os::errno_name(errno), errno);
1930 }
1931 }
1932
1933 // done with OnError
1934 OnError = nullptr;
1935 }
1936
1937 #if defined _WINDOWS
1938 if (UseOSErrorReporting) {
1939 raise_fail_fast(_siginfo, _context);
1940 }
1941 #endif // _WINDOWS
1942
1943 // os::abort() will call abort hooks, try it first.
1944 static bool skip_os_abort = false;
1945 if (!skip_os_abort) {
1946 skip_os_abort = true;
1947 bool dump_core = should_report_bug(_id);
1948 os::abort(dump_core && CreateCoredumpOnCrash, _siginfo, _context);
1949 // if os::abort() doesn't abort, try os::die();
1950 }
1951 os::die();
1952 }
1953
1954 /*
1955 * OnOutOfMemoryError scripts/commands executed while VM is a safepoint - this
1956 * ensures utilities such as jmap can observe the process is a consistent state.
1957 */
1958 class VM_ReportJavaOutOfMemory : public VM_Operation {
1959 private:
1960 const char* _message;
1961 public:
1962 VM_ReportJavaOutOfMemory(const char* message) { _message = message; }
1963 VMOp_Type type() const { return VMOp_ReportJavaOutOfMemory; }
1964 void doit();
1965 };
1966
1967 void VM_ReportJavaOutOfMemory::doit() {
1968 // Don't allocate large buffer on stack
1969 static char buffer[O_BUFLEN];
1970
1971 tty->print_cr("#");
1972 tty->print_cr("# java.lang.OutOfMemoryError: %s", _message);
1973 tty->print_cr("# -XX:OnOutOfMemoryError=\"%s\"", OnOutOfMemoryError);
1974
1975 // make heap parsability
1976 Universe::heap()->ensure_parsability(false); // no need to retire TLABs
1977
1978 char* cmd;
1979 const char* ptr = OnOutOfMemoryError;
1980 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != nullptr){
1981 tty->print("# Executing ");
1982 #if defined(LINUX)
1983 tty->print ("/bin/sh -c ");
1984 #endif
1985 tty->print_cr("\"%s\"...", cmd);
1986
1987 if (os::fork_and_exec(cmd) < 0) {
1988 tty->print_cr("os::fork_and_exec failed: %s (%s=%d)",
1989 os::strerror(errno), os::errno_name(errno), errno);
1990 }
1991 }
1992 }
1993
1994 void VMError::report_java_out_of_memory(const char* message) {
1995 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
1996 MutexLocker ml(Heap_lock);
1997 VM_ReportJavaOutOfMemory op(message);
1998 VMThread::execute(&op);
1999 }
2000 }
2001
2002 void VMError::show_message_box(char *buf, int buflen) {
2003 bool yes;
2004 do {
2005 error_string(buf, buflen);
2006 yes = os::start_debugging(buf,buflen);
2007 } while (yes);
2008 }
2009
2010 // Fatal error handling is subject to several timeouts:
2011 // - a global timeout (controlled via ErrorLogTimeout)
2012 // - local error reporting step timeouts.
2013 //
2014 // The latter aims to "give the JVM a kick" if it gets stuck in one particular place during
2015 // error reporting. This prevents one error reporting step from hogging all the time allotted
2016 // to error reporting under ErrorLogTimeout.
2017 //
2018 // VMError::check_timeout() is called from the watcher thread and checks for either global
2019 // or step timeout. If a timeout happened, we interrupt the reporting thread and set either
2020 // _reporting_did_timeout or _step_did_timeout to signal which timeout fired. Function returns
2021 // true if the *global* timeout fired, which will cause WatcherThread to shut down the JVM
2022 // immediately.
2023 bool VMError::check_timeout() {
2024
2025 // This function is supposed to be called from watcher thread during fatal error handling only.
2026 assert(VMError::is_error_reported(), "Only call during error handling");
2027 assert(Thread::current()->is_Watcher_thread(), "Only call from watcher thread");
2028
2029 if (ErrorLogTimeout == 0) {
2030 return false;
2031 }
2032
2033 // There are three situations where we suppress the *global* error timeout:
2034 // - if the JVM is embedded and the launcher has its abort hook installed.
2035 // That must be allowed to run.
2036 // - if the user specified one or more OnError commands to run, and these
2037 // did not yet run. These must have finished.
2038 // - if the user (typically developer) specified ShowMessageBoxOnError,
2039 // and the error box has not yet been shown
2040 const bool ignore_global_timeout =
2041 (ShowMessageBoxOnError
2042 || (OnError != nullptr && OnError[0] != '\0')
2043 || Arguments::abort_hook() != nullptr);
2044
2045 const jlong now = get_current_timestamp();
2046
2047 // Global timeout hit?
2048 if (!ignore_global_timeout) {
2049 const jlong reporting_start_time = get_reporting_start_time();
2050 // Timestamp is stored in nanos.
2051 if (reporting_start_time > 0) {
2052 const jlong end = reporting_start_time + (jlong)ErrorLogTimeout * TIMESTAMP_TO_SECONDS_FACTOR;
2053 if (end <= now && !_reporting_did_timeout) {
2054 // We hit ErrorLogTimeout and we haven't interrupted the reporting
2055 // thread yet.
2056 _reporting_did_timeout = true;
2057 interrupt_reporting_thread();
2058 return true; // global timeout
2059 }
2060 }
2061 }
2062
2063 // Reporting step timeout?
2064 const jlong step_start_time = get_step_start_time();
2065 if (step_start_time > 0) {
2066 // A step times out after a quarter of the total timeout. Steps are mostly fast unless they
2067 // hang for some reason, so this simple rule allows for three hanging step and still
2068 // hopefully leaves time enough for the rest of the steps to finish.
2069 const int max_step_timeout_secs = 5;
2070 const jlong timeout_duration = MAX2((jlong)max_step_timeout_secs, (jlong)ErrorLogTimeout * TIMESTAMP_TO_SECONDS_FACTOR / 4);
2071 const jlong end = step_start_time + timeout_duration;
2072 if (end <= now && !_step_did_timeout) {
2073 // The step timed out and we haven't interrupted the reporting
2074 // thread yet.
2075 _step_did_timeout = true;
2076 interrupt_reporting_thread();
2077 return false; // (Not a global timeout)
2078 }
2079 }
2080
2081 return false;
2082
2083 }
2084
2085 #ifdef ASSERT
2086 typedef void (*voidfun_t)();
2087
2088 // Crash with an authentic sigfpe
2089 volatile int sigfpe_int = 0;
2090 static void ALWAYSINLINE crash_with_sigfpe() {
2091
2092 // generate a native synchronous SIGFPE where possible;
2093 sigfpe_int = sigfpe_int/sigfpe_int;
2094
2095 // if that did not cause a signal (e.g. on ppc), just
2096 // raise the signal.
2097 #ifndef _WIN32
2098 // OSX implements raise(sig) incorrectly so we need to
2099 // explicitly target the current thread
2100 pthread_kill(pthread_self(), SIGFPE);
2101 #endif
2102
2103 } // end: crash_with_sigfpe
2104
2105 // crash with sigsegv at non-null address.
2106 static void ALWAYSINLINE crash_with_segfault() {
2107
2108 int* crash_addr = reinterpret_cast<int*>(VMError::segfault_address);
2109 *crash_addr = 1;
2110
2111 } // end: crash_with_segfault
2112
2113 // crash in a controlled way:
2114 // 1 - assert
2115 // 2 - guarantee
2116 // 14 - SIGSEGV
2117 // 15 - SIGFPE
2118 void VMError::controlled_crash(int how) {
2119
2120 // Case 14 is tested by test/hotspot/jtreg/runtime/ErrorHandling/SafeFetchInErrorHandlingTest.java.
2121 // Case 15 is tested by test/hotspot/jtreg/runtime/ErrorHandling/SecondaryErrorTest.java.
2122 // Case 16 is tested by test/hotspot/jtreg/runtime/ErrorHandling/ThreadsListHandleInErrorHandlingTest.java.
2123 // Case 17 is tested by test/hotspot/jtreg/runtime/ErrorHandling/NestedThreadsListHandleInErrorHandlingTest.java.
2124
2125 // We try to grab Threads_lock to keep ThreadsSMRSupport::print_info_on()
2126 // from racing with Threads::add() or Threads::remove() as we
2127 // generate the hs_err_pid file. This makes our ErrorHandling tests
2128 // more stable.
2129 if (!Threads_lock->owned_by_self()) {
2130 Threads_lock->try_lock();
2131 // The VM is going to die so no need to unlock Thread_lock.
2132 }
2133
2134 switch (how) {
2135 case 1: assert(how == 0, "test assert"); break;
2136 case 2: guarantee(how == 0, "test guarantee"); break;
2137
2138 // The other cases are unused.
2139 case 14: crash_with_segfault(); break;
2140 case 15: crash_with_sigfpe(); break;
2141 case 16: {
2142 ThreadsListHandle tlh;
2143 fatal("Force crash with an active ThreadsListHandle.");
2144 }
2145 case 17: {
2146 ThreadsListHandle tlh;
2147 {
2148 ThreadsListHandle tlh2;
2149 fatal("Force crash with a nested ThreadsListHandle.");
2150 }
2151 }
2152 default:
2153 // If another number is given, give a generic crash.
2154 fatal("Crashing with number %d", how);
2155 }
2156 tty->print_cr("controlled_crash: survived intentional crash. Did you suppress the assert?");
2157 ShouldNotReachHere();
2158 }
2159 #endif // !ASSERT
2160
2161 VMErrorCallbackMark::VMErrorCallbackMark(VMErrorCallback* callback)
2162 : _thread(Thread::current()) {
2163 callback->_next = _thread->_vm_error_callbacks;
2164 _thread->_vm_error_callbacks = callback;
2165 }
2166
2167 VMErrorCallbackMark::~VMErrorCallbackMark() {
2168 assert(_thread->_vm_error_callbacks != nullptr, "Popped too far");
2169 _thread->_vm_error_callbacks = _thread->_vm_error_callbacks->_next;
2170 }