1 /*
2 * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2017, 2024 SAP SE. All rights reserved.
4 * Copyright (c) 2023, 2025, 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 "cds/metaspaceShared.hpp"
28 #include "code/codeCache.hpp"
29 #include "compiler/compilationFailureInfo.hpp"
30 #include "compiler/compilationMemoryStatistic.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 "sanitizers/ub.hpp"
64 #include "utilities/debug.hpp"
65 #include "utilities/decoder.hpp"
66 #include "utilities/defaultStream.hpp"
67 #include "utilities/events.hpp"
68 #include "utilities/globalDefinitions.hpp"
69 #include "utilities/macros.hpp"
70 #include "utilities/nativeStackPrinter.hpp"
71 #include "utilities/ostream.hpp"
72 #include "utilities/vmError.hpp"
73 #if INCLUDE_JFR
74 #include "jfr/jfr.hpp"
75 #endif
76 #if INCLUDE_JVMCI
77 #include "jvmci/jvmci.hpp"
78 #endif
79
80 #ifndef PRODUCT
81 #include <signal.h>
82 #endif // PRODUCT
83
84 bool VMError::coredump_status;
85 char VMError::coredump_message[O_BUFLEN];
86 int VMError::_current_step;
87 const char* VMError::_current_step_info;
88 volatile jlong VMError::_reporting_start_time = -1;
89 volatile bool VMError::_reporting_did_timeout = false;
90 volatile jlong VMError::_step_start_time = -1;
91 volatile bool VMError::_step_did_timeout = false;
92 volatile bool VMError::_step_did_succeed = false;
93 volatile intptr_t VMError::_first_error_tid = -1;
94 int VMError::_id;
95 const char* VMError::_message;
96 char VMError::_detail_msg[1024];
97 Thread* VMError::_thread;
98 address VMError::_pc;
99 const void* VMError::_siginfo;
100 const void* VMError::_context;
101 bool VMError::_print_stack_from_frame_used = false;
102 const char* VMError::_filename;
103 int VMError::_lineno;
104 size_t VMError::_size;
105 const size_t VMError::_reattempt_required_stack_headroom = 64 * K;
106 const intptr_t VMError::segfault_address = pd_segfault_address;
107
108 // List of environment variables that should be reported in error log file.
109 static const char* env_list[] = {
110 // All platforms
111 "JAVA_HOME", "JAVA_TOOL_OPTIONS", "_JAVA_OPTIONS", "CLASSPATH",
112 "PATH", "USERNAME",
113
114 "XDG_CACHE_HOME", "XDG_CONFIG_HOME", "FC_LANG", "FONTCONFIG_USE_MMAP",
115
116 // Env variables that are defined on Linux/BSD
117 "LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY",
118 "HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE",
119 "LANG", "LC_ALL", "LC_CTYPE", "LC_NUMERIC", "LC_TIME",
120 "TERM", "TMPDIR", "TZ",
121
122 // defined on AIX
123 "LIBPATH", "LDR_PRELOAD", "LDR_PRELOAD64",
124
125 // defined on Linux/AIX/BSD
126 "_JAVA_SR_SIGNUM",
127
128 // defined on Darwin
129 "DYLD_LIBRARY_PATH", "DYLD_FALLBACK_LIBRARY_PATH",
130 "DYLD_FRAMEWORK_PATH", "DYLD_FALLBACK_FRAMEWORK_PATH",
131 "DYLD_INSERT_LIBRARIES",
132
133 // defined on Windows
134 "OS", "PROCESSOR_IDENTIFIER", "_ALT_JAVA_HOME_DIR", "TMP", "TEMP",
135
136 nullptr // End marker.
137 };
138
139 // A simple parser for lists of commands such as -XX:OnError and -XX:OnOutOfMemoryError
140 // Command list (ptr) is expected to be a sequence of commands delineated by semicolons and/or newlines.
141 // Usage:
142 // ptr = OnError;
143 // while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr) != nullptr)
144 // ... ...
145 static char* next_OnError_command(char* buf, int buflen, const char** ptr) {
146 if (ptr == nullptr || *ptr == nullptr) return nullptr;
147
148 const char* cmd = *ptr;
149
150 // skip leading blanks, ';' or newlines
151 while (*cmd == ' ' || *cmd == ';' || *cmd == '\n') cmd++;
152
153 if (*cmd == '\0') return nullptr;
154
155 const char * cmdend = cmd;
156 while (*cmdend != '\0' && *cmdend != ';' && *cmdend != '\n') cmdend++;
157
158 Arguments::copy_expand_pid(cmd, cmdend - cmd, buf, buflen);
159
160 *ptr = (*cmdend == '\0' ? cmdend : cmdend + 1);
161 return buf;
162 }
163
164 static void print_bug_submit_message(outputStream *out, Thread *thread) {
165 if (out == nullptr) return;
166 const char *url = Arguments::java_vendor_url_bug();
167 if (url == nullptr || *url == '\0')
168 url = JDK_Version::runtime_vendor_vm_bug_url();
169 if (url != nullptr && *url != '\0') {
170 out->print_raw_cr("# If you would like to submit a bug report, please visit:");
171 out->print_raw ("# ");
172 out->print_raw_cr(url);
173 }
174 // If the crash is in native code, encourage user to submit a bug to the
175 // provider of that code.
176 if (thread && thread->is_Java_thread() &&
177 !thread->is_hidden_from_external_view()) {
178 if (JavaThread::cast(thread)->thread_state() == _thread_in_native) {
179 out->print_cr("# The crash happened outside the Java Virtual Machine in native code.\n# See problematic frame for where to report the bug.");
180 }
181 }
182 out->print_raw_cr("#");
183 }
184
185 static bool stack_has_headroom(size_t headroom) {
186 size_t stack_size = 0;
187 address stack_base = nullptr;
188 os::current_stack_base_and_size(&stack_base, &stack_size);
189
190 const size_t guard_size = StackOverflow::stack_guard_zone_size();
191 const size_t unguarded_stack_size = stack_size - guard_size;
192
193 if (unguarded_stack_size < headroom) {
194 return false;
195 }
196
197 const address unguarded_stack_end = stack_base - unguarded_stack_size;
198 const address stack_pointer = os::current_stack_pointer();
199
200 return stack_pointer >= unguarded_stack_end + headroom;
201 }
202
203 #ifdef ASSERT
204 PRAGMA_DIAG_PUSH
205 PRAGMA_INFINITE_RECURSION_IGNORED
206 void VMError::reattempt_test_hit_stack_limit(outputStream* st) {
207 if (stack_has_headroom(_reattempt_required_stack_headroom)) {
208 // Use all but (_reattempt_required_stack_headroom - K) unguarded stack space.
209 size_t stack_size = 0;
210 address stack_base = nullptr;
211 os::current_stack_base_and_size(&stack_base, &stack_size);
212
213 const size_t guard_size = StackOverflow::stack_guard_zone_size();
214 const address stack_pointer = os::current_stack_pointer();
215
216 const size_t unguarded_stack_size = stack_size - guard_size;
217 const address unguarded_stack_end = stack_base - unguarded_stack_size;
218 const size_t available_headroom = stack_pointer - unguarded_stack_end;
219 const size_t allocation_size = available_headroom - _reattempt_required_stack_headroom + K;
220
221 st->print_cr("Current Stack Pointer: " PTR_FORMAT " alloca %zu"
222 " of %zu bytes available unguarded stack space",
223 p2i(stack_pointer), allocation_size, available_headroom);
224
225 // Allocate byte blob on the stack. Make pointer volatile to avoid having
226 // the compiler removing later reads.
227 volatile char* stack_buffer = static_cast<char*>(alloca(allocation_size));
228 // Initialize the last byte.
229 stack_buffer[allocation_size - 1] = '\0';
230 // Recursive call should hit the stack limit.
231 reattempt_test_hit_stack_limit(st);
232 // Perform a volatile read of the last byte to avoid having the complier
233 // remove the allocation.
234 static_cast<void>(stack_buffer[allocation_size - 1] == '\0');
235 }
236 controlled_crash(14);
237 }
238 PRAGMA_DIAG_POP
239 #endif // ASSERT
240
241 bool VMError::can_reattempt_step(const char* &stop_reason) {
242 if (!stack_has_headroom(_reattempt_required_stack_headroom)) {
243 stop_reason = "Stack headroom limit reached";
244 return false;
245 }
246
247 if (_step_did_timeout) {
248 stop_reason = "Step time limit reached";
249 return false;
250 }
251
252 return true;
253 }
254
255 void VMError::record_coredump_status(const char* message, bool status) {
256 coredump_status = status;
257 strncpy(coredump_message, message, sizeof(coredump_message));
258 coredump_message[sizeof(coredump_message)-1] = 0;
259 }
260
261 // Return a string to describe the error
262 char* VMError::error_string(char* buf, int buflen) {
263 char signame_buf[64];
264 const char *signame = os::exception_name(_id, signame_buf, sizeof(signame_buf));
265
266 if (signame) {
267 jio_snprintf(buf, buflen,
268 "%s (0x%x) at pc=" PTR_FORMAT ", pid=%d, tid=%zu",
269 signame, _id, _pc,
270 os::current_process_id(), os::current_thread_id());
271 } else if (_filename != nullptr && _lineno > 0) {
272 // skip directory names
273 int n = jio_snprintf(buf, buflen,
274 "Internal Error at %s:%d, pid=%d, tid=%zu",
275 get_filename_only(), _lineno,
276 os::current_process_id(), os::current_thread_id());
277 if (n >= 0 && n < buflen && _message) {
278 if (strlen(_detail_msg) > 0) {
279 jio_snprintf(buf + n, buflen - n, "%s%s: %s",
280 os::line_separator(), _message, _detail_msg);
281 } else {
282 jio_snprintf(buf + n, buflen - n, "%sError: %s",
283 os::line_separator(), _message);
284 }
285 }
286 } else {
287 jio_snprintf(buf, buflen,
288 "Internal Error (0x%x), pid=%d, tid=%zu",
289 _id, os::current_process_id(), os::current_thread_id());
290 }
291
292 return buf;
293 }
294
295 void VMError::print_stack_trace(outputStream* st, JavaThread* jt,
296 char* buf, int buflen, bool verbose) {
297 #ifdef ZERO
298 if (jt->zero_stack()->sp() && jt->top_zero_frame()) {
299 // StackFrameStream uses the frame anchor, which may not have
300 // been set up. This can be done at any time in Zero, however,
301 // so if it hasn't been set up then we just set it up now and
302 // clear it again when we're done.
303 bool has_last_Java_frame = jt->has_last_Java_frame();
304 if (!has_last_Java_frame)
305 jt->set_last_Java_frame();
306 st->print("Java frames:");
307 st->cr();
308
309 // Print the frames
310 StackFrameStream sfs(jt, true /* update */, true /* process_frames */);
311 for(int i = 0; !sfs.is_done(); sfs.next(), i++) {
312 sfs.current()->zero_print_on_error(i, st, buf, buflen);
313 st->cr();
314 }
315
316 // Reset the frame anchor if necessary
317 if (!has_last_Java_frame)
318 jt->reset_last_Java_frame();
319 }
320 #else
321 if (jt->has_last_Java_frame()) {
322 st->print_cr("Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)");
323 for (StackFrameStream sfs(jt, true /* update */, true /* process_frames */); !sfs.is_done(); sfs.next()) {
324 sfs.current()->print_on_error(st, buf, buflen, verbose);
325 st->cr();
326 }
327 }
328 #endif // ZERO
329 }
330
331 const char* VMError::get_filename_only() {
332 char separator = os::file_separator()[0];
333 const char* p = strrchr(_filename, separator);
334 return p ? p + 1 : _filename;
335 }
336
337 /**
338 * Adds `value` to `list` iff it's not already present and there is sufficient
339 * capacity (i.e. length(list) < `list_capacity`). The length of the list
340 * is the index of the first nullptr entry or `list_capacity` if there are
341 * no nullptr entries.
342 *
343 * @ return true if the value was added, false otherwise
344 */
345 static bool add_if_absent(address value, address* list, int list_capacity) {
346 for (int i = 0; i < list_capacity; i++) {
347 if (list[i] == value) {
348 return false;
349 }
350 if (list[i] == nullptr) {
351 list[i] = value;
352 if (i + 1 < list_capacity) {
353 list[i + 1] = nullptr;
354 }
355 return true;
356 }
357 }
358 return false;
359 }
360
361 /**
362 * Prints the VM generated code unit, if any, containing `pc` if it has not already
363 * been printed. If the code unit is an InterpreterCodelet or StubCodeDesc, it is
364 * only printed if `is_crash_pc` is true.
365 *
366 * @param printed array of code units that have already been printed (delimited by nullptr entry)
367 * @param printed_capacity the capacity of `printed`
368 * @return true if the code unit was printed, false otherwise
369 */
370 static bool print_code(outputStream* st, Thread* thread, address pc, bool is_crash_pc,
371 address* printed, int printed_capacity) {
372 if (Interpreter::contains(pc)) {
373 if (is_crash_pc) {
374 // The interpreter CodeBlob is very large so try to print the codelet instead.
375 InterpreterCodelet* codelet = Interpreter::codelet_containing(pc);
376 if (codelet != nullptr) {
377 if (add_if_absent((address) codelet, printed, printed_capacity)) {
378 codelet->print_on(st);
379 Disassembler::decode(codelet->code_begin(), codelet->code_end(), st);
380 return true;
381 }
382 }
383 }
384 } else {
385 StubCodeDesc* desc = StubCodeDesc::desc_for(pc);
386 if (desc != nullptr) {
387 if (is_crash_pc) {
388 if (add_if_absent((address) desc, printed, printed_capacity)) {
389 desc->print_on(st);
390 Disassembler::decode(desc->begin(), desc->end(), st);
391 return true;
392 }
393 }
394 } else if (thread != nullptr) {
395 CodeBlob* cb = CodeCache::find_blob(pc);
396 if (cb != nullptr && add_if_absent((address) cb, printed, printed_capacity)) {
397 // Disassembling nmethod will incur resource memory allocation,
398 // only do so when thread is valid.
399 ResourceMark rm(thread);
400 Disassembler::decode(cb, st);
401 st->cr();
402 return true;
403 }
404 }
405 }
406 return false;
407 }
408
409 // Like above, but only try to figure out a short name. Return nullptr if not found.
410 static const char* find_code_name(address pc) {
411 if (Interpreter::contains(pc)) {
412 InterpreterCodelet* codelet = Interpreter::codelet_containing(pc);
413 if (codelet != nullptr) {
414 return codelet->description();
415 }
416 } else {
417 StubCodeDesc* desc = StubCodeDesc::desc_for(pc);
418 if (desc != nullptr) {
419 return desc->name();
420 } else {
421 CodeBlob* cb = CodeCache::find_blob(pc);
422 if (cb != nullptr) {
423 return cb->name();
424 }
425 }
426 }
427 return nullptr;
428 }
429
430 static void print_oom_reasons(outputStream* st) {
431 st->print_cr("# Possible reasons:");
432 st->print_cr("# The system is out of physical RAM or swap space");
433 #ifdef LINUX
434 st->print_cr("# This process has exceeded the maximum number of memory mappings (check below");
435 st->print_cr("# for `/proc/sys/vm/max_map_count` and `Total number of mappings`)");
436 #endif
437 if (UseCompressedOops) {
438 st->print_cr("# This process is running with CompressedOops enabled, and the Java Heap may be blocking the growth of the native heap");
439 }
440 if (LogBytesPerWord == 2) {
441 st->print_cr("# In 32 bit mode, the process size limit was hit");
442 }
443 st->print_cr("# Possible solutions:");
444 st->print_cr("# Reduce memory load on the system");
445 st->print_cr("# Increase physical memory or swap space");
446 st->print_cr("# Check if swap backing store is full");
447 if (LogBytesPerWord == 2) {
448 st->print_cr("# Use 64 bit Java on a 64 bit OS");
449 }
450 st->print_cr("# Decrease Java heap size (-Xmx/-Xms)");
451 st->print_cr("# Decrease number of Java threads");
452 st->print_cr("# Decrease Java thread stack sizes (-Xss)");
453 st->print_cr("# Set larger code cache with -XX:ReservedCodeCacheSize=");
454 if (UseCompressedOops) {
455 switch (CompressedOops::mode()) {
456 case CompressedOops::UnscaledNarrowOop:
457 st->print_cr("# JVM is running with Unscaled Compressed Oops mode in which the Java heap is");
458 st->print_cr("# placed in the first 4GB address space. The Java Heap base address is the");
459 st->print_cr("# maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
460 st->print_cr("# to set the Java Heap base and to place the Java Heap above 4GB virtual address.");
461 break;
462 case CompressedOops::ZeroBasedNarrowOop:
463 st->print_cr("# JVM is running with Zero Based Compressed Oops mode in which the Java heap is");
464 st->print_cr("# placed in the first 32GB address space. The Java Heap base address is the");
465 st->print_cr("# maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
466 st->print_cr("# to set the Java Heap base and to place the Java Heap above 32GB virtual address.");
467 break;
468 default:
469 break;
470 }
471 }
472 st->print_cr("# This output file may be truncated or incomplete.");
473 }
474
475 static void print_stack_location(outputStream* st, const void* context, int& continuation) {
476 const int number_of_stack_slots = 8;
477
478 int i = continuation;
479 // Update continuation with next index before fetching frame
480 continuation = i + 1;
481 const frame fr = os::fetch_frame_from_context(context);
482 while (i < number_of_stack_slots) {
483 // Update continuation with next index before printing location
484 continuation = i + 1;
485 // decode stack contents if possible
486 const intptr_t *sp = fr.sp();
487 const intptr_t *slot = sp + i;
488 if (!is_aligned(slot, sizeof(intptr_t))) {
489 st->print_cr("Misaligned sp: " PTR_FORMAT, p2i(sp));
490 break;
491 } else if (os::is_readable_pointer(slot)) {
492 st->print("stack at sp + %d slots: ", i);
493 os::print_location(st, *(slot));
494 } else {
495 st->print_cr("unreadable stack slot at sp + %d", i);
496 }
497 ++i;
498 }
499 }
500
501 static void report_vm_version(outputStream* st, char* buf, int buflen) {
502 // VM version
503 st->print_cr("#");
504 JDK_Version::current().to_string(buf, buflen);
505 const char* runtime_name = JDK_Version::runtime_name() != nullptr ?
506 JDK_Version::runtime_name() : "";
507 const char* runtime_version = JDK_Version::runtime_version() != nullptr ?
508 JDK_Version::runtime_version() : "";
509 const char* vendor_version = JDK_Version::runtime_vendor_version() != nullptr ?
510 JDK_Version::runtime_vendor_version() : "";
511 const char* jdk_debug_level = VM_Version::printable_jdk_debug_level() != nullptr ?
512 VM_Version::printable_jdk_debug_level() : "";
513
514 st->print_cr("# JRE version: %s%s%s (%s) (%sbuild %s)", runtime_name,
515 (*vendor_version != '\0') ? " " : "", vendor_version,
516 buf, jdk_debug_level, runtime_version);
517
518 // This is the long version with some default settings added
519 st->print_cr("# Java VM: %s%s%s (%s%s, %s%s%s%s%s%s, %s, %s)",
520 VM_Version::vm_name(),
521 (*vendor_version != '\0') ? " " : "", vendor_version,
522 jdk_debug_level,
523 VM_Version::vm_release(),
524 VM_Version::vm_info_string(),
525 TieredCompilation ? ", tiered" : "",
526 #if INCLUDE_JVMCI
527 EnableJVMCI ? ", jvmci" : "",
528 UseJVMCICompiler ? ", jvmci compiler" : "",
529 #else
530 "", "",
531 #endif
532 UseCompressedOops ? ", compressed oops" : "",
533 UseCompactObjectHeaders ? ", compact obj headers"
534 : (UseCompressedClassPointers ? ", compressed class ptrs" : ""),
535 GCConfig::hs_err_name(),
536 VM_Version::vm_platform_string()
537 );
538 }
539
540 // Returns true if at least one thread reported a fatal error and fatal error handling is in process.
541 bool VMError::is_error_reported() {
542 return _first_error_tid != -1;
543 }
544
545 // Returns true if the current thread reported a fatal error.
546 bool VMError::is_error_reported_in_current_thread() {
547 return _first_error_tid == os::current_thread_id();
548 }
549
550 // Helper, return current timestamp for timeout handling.
551 jlong VMError::get_current_timestamp() {
552 return os::javaTimeNanos();
553 }
554 // Factor to translate the timestamp to seconds.
555 #define TIMESTAMP_TO_SECONDS_FACTOR (1000 * 1000 * 1000)
556
557 void VMError::record_reporting_start_time() {
558 const jlong now = get_current_timestamp();
559 Atomic::store(&_reporting_start_time, now);
560 }
561
562 jlong VMError::get_reporting_start_time() {
563 return Atomic::load(&_reporting_start_time);
564 }
565
566 void VMError::record_step_start_time() {
567 const jlong now = get_current_timestamp();
568 Atomic::store(&_step_start_time, now);
569 }
570
571 jlong VMError::get_step_start_time() {
572 return Atomic::load(&_step_start_time);
573 }
574
575 void VMError::clear_step_start_time() {
576 return Atomic::store(&_step_start_time, (jlong)0);
577 }
578
579 // This is the main function to report a fatal error. Only one thread can
580 // call this function, so we don't need to worry about MT-safety. But it's
581 // possible that the error handler itself may crash or die on an internal
582 // error, for example, when the stack/heap is badly damaged. We must be
583 // able to handle recursive errors that happen inside error handler.
584 //
585 // Error reporting is done in several steps. If a crash or internal error
586 // occurred when reporting an error, the nested signal/exception handler
587 // can skip steps that are already (or partially) done. Error reporting will
588 // continue from the next step. This allows us to retrieve and print
589 // information that may be unsafe to get after a fatal error. If it happens,
590 // you may find nested report_and_die() frames when you look at the stack
591 // in a debugger.
592 //
593 // In general, a hang in error handler is much worse than a crash or internal
594 // error, as it's harder to recover from a hang. Deadlock can happen if we
595 // try to grab a lock that is already owned by current thread, or if the
596 // owner is blocked forever (e.g. in os::infinite_sleep()). If possible, the
597 // error handler and all the functions it called should avoid grabbing any
598 // lock. An important thing to notice is that memory allocation needs a lock.
599 //
600 // We should avoid using large stack allocated buffers. Many errors happen
601 // when stack space is already low. Making things even worse is that there
602 // could be nested report_and_die() calls on stack (see above). Only one
603 // thread can report error, so large buffers are statically allocated in data
604 // segment.
605 void VMError::report(outputStream* st, bool _verbose) {
606 // Used by reattempt step logic
607 static int continuation = 0;
608 const char* stop_reattempt_reason = nullptr;
609 # define BEGIN \
610 if (_current_step == 0) { \
611 _step_did_succeed = false; \
612 _current_step = __LINE__; \
613 {
614 // [Begin logic]
615
616 # define STEP_IF(s, cond) \
617 } \
618 _step_did_succeed = true; \
619 } \
620 if (_current_step < __LINE__) { \
621 _step_did_succeed = false; \
622 _current_step = __LINE__; \
623 _current_step_info = s; \
624 if ((cond)) { \
625 record_step_start_time(); \
626 _step_did_timeout = false;
627 // [Step logic]
628
629 # define STEP(s) STEP_IF(s, true)
630
631 # define REATTEMPT_STEP_IF(s, cond) \
632 } \
633 _step_did_succeed = true; \
634 } \
635 if (_current_step < __LINE__ && !_step_did_succeed) { \
636 _current_step = __LINE__; \
637 _current_step_info = s; \
638 const bool cond_value = (cond); \
639 if (cond_value && !can_reattempt_step( \
640 stop_reattempt_reason)) { \
641 st->print_cr("[stop reattempt (%s) reason: %s]", \
642 _current_step_info, \
643 stop_reattempt_reason); \
644 } else if (cond_value) {
645 // [Continue Step logic]
646
647 # define END \
648 } \
649 _step_did_succeed = true; \
650 clear_step_start_time(); \
651 }
652
653 // don't allocate large buffer on stack
654 static char buf[O_BUFLEN];
655
656 // Native stack trace may get stuck. We try to handle the last pc if it
657 // belongs to VM generated code.
658 address lastpc = nullptr;
659
660 BEGIN
661 if (MemTracker::enabled() &&
662 NmtVirtualMemory_lock != nullptr &&
663 NmtVirtualMemory_lock->owned_by_self()) {
664 // Manually unlock to avoid reentrancy due to mallocs in detailed mode.
665 NmtVirtualMemory_lock->unlock();
666 }
667
668 STEP("printing fatal error message")
669 st->print_cr("#");
670 if (should_report_bug(_id)) {
671 st->print_cr("# A fatal error has been detected by the Java Runtime Environment:");
672 } else {
673 st->print_cr("# There is insufficient memory for the Java "
674 "Runtime Environment to continue.");
675 }
676
677 // avoid the cache update for malloc/mmap errors
678 if (should_report_bug(_id)) {
679 os::prepare_native_symbols();
680 }
681
682 #ifdef ASSERT
683 // Error handler self tests
684 // Meaning of codes passed through in the tests.
685 #define TEST_SECONDARY_CRASH 14
686 #define TEST_REATTEMPT_SECONDARY_CRASH 15
687 #define TEST_RESOURCE_MARK_CRASH 2
688
689 // test secondary error handling. Test it twice, to test that resetting
690 // error handler after a secondary crash works.
691 STEP_IF("test secondary crash 1", _verbose && TestCrashInErrorHandler == TEST_SECONDARY_CRASH)
692 st->print_cr("Will crash now (TestCrashInErrorHandler=%u)...",
693 TestCrashInErrorHandler);
694 controlled_crash(TestCrashInErrorHandler);
695
696 STEP_IF("test secondary crash 2", _verbose && TestCrashInErrorHandler == TEST_SECONDARY_CRASH)
697 st->print_cr("Will crash now (TestCrashInErrorHandler=%u)...",
698 TestCrashInErrorHandler);
699 controlled_crash(TestCrashInErrorHandler);
700
701 // See corresponding test in test/runtime/ErrorHandling/ReattemptErrorTest.java
702 STEP_IF("test reattempt secondary crash",
703 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
704 st->print_cr("Will crash now (TestCrashInErrorHandler=%u)...",
705 TestCrashInErrorHandler);
706 controlled_crash(14);
707
708 REATTEMPT_STEP_IF("test reattempt secondary crash, attempt 2",
709 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
710 st->print_cr("test reattempt secondary crash. attempt 2");
711
712 REATTEMPT_STEP_IF("test reattempt secondary crash, attempt 3",
713 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
714 st->print_cr("test reattempt secondary crash. attempt 3");
715
716 STEP_IF("test reattempt timeout",
717 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
718 st->print_cr("test reattempt timeout");
719 os::infinite_sleep();
720
721 REATTEMPT_STEP_IF("test reattempt timeout, attempt 2",
722 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
723 st->print_cr("test reattempt timeout, attempt 2");
724
725 STEP_IF("test reattempt stack headroom",
726 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
727 st->print_cr("test reattempt stack headroom");
728 reattempt_test_hit_stack_limit(st);
729
730 REATTEMPT_STEP_IF("test reattempt stack headroom, attempt 2",
731 _verbose && TestCrashInErrorHandler == TEST_REATTEMPT_SECONDARY_CRASH)
732 st->print_cr("test reattempt stack headroom, attempt 2");
733
734 STEP_IF("test missing ResourceMark does not crash",
735 _verbose && TestCrashInErrorHandler == TEST_RESOURCE_MARK_CRASH)
736 stringStream message;
737 message.print("This is a message with no ResourceMark");
738 tty->print_cr("%s", message.as_string());
739
740 // TestUnresponsiveErrorHandler: We want to test both step timeouts and global timeout.
741 // Step to global timeout ratio is 4:1, so in order to be absolutely sure we hit the
742 // global timeout, let's execute the timeout step five times.
743 // See corresponding test in test/runtime/ErrorHandling/TimeoutInErrorHandlingTest.java
744 STEP_IF("setup for test unresponsive error reporting step",
745 _verbose && TestUnresponsiveErrorHandler)
746 // We record reporting_start_time for this test here because we
747 // care about the time spent executing TIMEOUT_TEST_STEP and not
748 // about the time it took us to get here.
749 tty->print_cr("Recording reporting_start_time for TestUnresponsiveErrorHandler.");
750 record_reporting_start_time();
751
752 #define TIMEOUT_TEST_STEP STEP_IF("test unresponsive error reporting step", \
753 _verbose && TestUnresponsiveErrorHandler) \
754 os::infinite_sleep();
755 TIMEOUT_TEST_STEP
756 TIMEOUT_TEST_STEP
757 TIMEOUT_TEST_STEP
758 TIMEOUT_TEST_STEP
759 TIMEOUT_TEST_STEP
760
761 STEP_IF("test safefetch in error handler", _verbose && TestSafeFetchInErrorHandler)
762 // test whether it is safe to use SafeFetch32 in Crash Handler. Test twice
763 // to test that resetting the signal handler works correctly.
764 st->print_cr("Will test SafeFetch...");
765 int* const invalid_pointer = (int*)segfault_address;
766 const int x = 0x76543210;
767 int i1 = SafeFetch32(invalid_pointer, x);
768 int i2 = SafeFetch32(invalid_pointer, x);
769 if (i1 == x && i2 == x) {
770 st->print_cr("SafeFetch OK."); // Correctly deflected and returned default pattern
771 } else {
772 st->print_cr("??");
773 }
774 #endif // ASSERT
775
776 STEP("printing type of error")
777 switch(static_cast<unsigned int>(_id)) {
778 case OOM_MALLOC_ERROR:
779 case OOM_MMAP_ERROR:
780 case OOM_MPROTECT_ERROR:
781 if (_size) {
782 st->print("# Native memory allocation ");
783 st->print((_id == (int)OOM_MALLOC_ERROR) ? "(malloc) failed to allocate " :
784 (_id == (int)OOM_MMAP_ERROR) ? "(mmap) failed to map " :
785 "(mprotect) failed to protect ");
786 jio_snprintf(buf, sizeof(buf), "%zu", _size);
787 st->print("%s", buf);
788 st->print(" bytes.");
789 if (strlen(_detail_msg) > 0) {
790 st->print(" Error detail: ");
791 st->print("%s", _detail_msg);
792 }
793 st->cr();
794 } else {
795 if (strlen(_detail_msg) > 0) {
796 st->print("# ");
797 st->print_cr("%s", _detail_msg);
798 }
799 }
800 // In error file give some solutions
801 if (_verbose) {
802 print_oom_reasons(st);
803 } else {
804 return; // that's enough for the screen
805 }
806 break;
807 case INTERNAL_ERROR:
808 default:
809 break;
810 }
811
812 STEP("printing exception/signal name")
813 st->print_cr("#");
814 st->print("# ");
815 // Is it an OS exception/signal?
816 if (os::exception_name(_id, buf, sizeof(buf))) {
817 st->print("%s", buf);
818 st->print(" (0x%x)", _id); // signal number
819 st->print(" at pc=" PTR_FORMAT, p2i(_pc));
820 if (_siginfo != nullptr && os::signal_sent_by_kill(_siginfo)) {
821 st->print(" (sent by kill)");
822 }
823 } else {
824 if (should_report_bug(_id)) {
825 st->print("Internal Error");
826 } else {
827 st->print("Out of Memory Error");
828 }
829 if (_filename != nullptr && _lineno > 0) {
830 #ifdef PRODUCT
831 // In product mode chop off pathname
832 const char *file = get_filename_only();
833 #else
834 const char *file = _filename;
835 #endif
836 st->print(" (%s:%d)", file, _lineno);
837 } else {
838 st->print(" (0x%x)", _id);
839 }
840 }
841
842 STEP("printing current thread and pid")
843 // process id, thread id
844 st->print(", pid=%d", os::current_process_id());
845 st->print(", tid=%zu", os::current_thread_id());
846 st->cr();
847
848 STEP_IF("printing error message", should_report_bug(_id)) // already printed the message.
849 // error message
850 if (strlen(_detail_msg) > 0) {
851 st->print_cr("# %s: %s", _message ? _message : "Error", _detail_msg);
852 } else if (_message) {
853 st->print_cr("# Error: %s", _message);
854 }
855
856 STEP("printing Java version string")
857 report_vm_version(st, buf, sizeof(buf));
858
859 STEP_IF("printing problematic frame", _context != nullptr)
860 // Print current frame if we have a context (i.e. it's a crash)
861 st->print_cr("# Problematic frame:");
862 st->print("# ");
863 frame fr = os::fetch_frame_from_context(_context);
864 fr.print_on_error(st, buf, sizeof(buf));
865 st->cr();
866 st->print_cr("#");
867
868 STEP("printing core file information")
869 st->print("# ");
870 if (CreateCoredumpOnCrash) {
871 if (coredump_status) {
872 st->print("Core dump will be written. Default location: %s", coredump_message);
873 } else {
874 st->print("No core dump will be written. %s", coredump_message);
875 }
876 } else {
877 st->print("CreateCoredumpOnCrash turned off, no core file dumped");
878 }
879 st->cr();
880 st->print_cr("#");
881
882 JFR_ONLY(STEP("printing jfr information"))
883 JFR_ONLY(Jfr::on_vm_error_report(st);)
884
885 STEP_IF("printing bug submit message", should_submit_bug_report(_id) && _verbose)
886 print_bug_submit_message(st, _thread);
887
888 STEP_IF("printing summary", _verbose)
889 st->cr();
890 st->print_cr("--------------- S U M M A R Y ------------");
891 st->cr();
892
893 STEP_IF("printing VM option summary", _verbose)
894 // VM options
895 Arguments::print_summary_on(st);
896 st->cr();
897
898 STEP_IF("printing summary machine and OS info", _verbose)
899 os::print_summary_info(st, buf, sizeof(buf));
900
901 STEP_IF("printing date and time", _verbose)
902 os::print_date_and_time(st, buf, sizeof(buf));
903
904 STEP_IF("printing thread", _verbose)
905 st->cr();
906 st->print_cr("--------------- T H R E A D ---------------");
907 st->cr();
908
909 STEP_IF("printing current thread", _verbose)
910 // current thread
911 if (_thread) {
912 st->print("Current thread (" PTR_FORMAT "): ", p2i(_thread));
913 _thread->print_on_error(st, buf, sizeof(buf));
914 st->cr();
915 } else {
916 st->print_cr("Current thread is native thread");
917 }
918 st->cr();
919
920 STEP_IF("printing current compile task",
921 _verbose && _thread != nullptr && _thread->is_Compiler_thread())
922 CompilerThread* t = (CompilerThread*)_thread;
923 if (t->task()) {
924 st->cr();
925 st->print_cr("Current CompileTask:");
926 t->task()->print_line_on_error(st, buf, sizeof(buf));
927 st->cr();
928 }
929
930 STEP_IF("printing stack bounds", _verbose)
931 st->print("Stack: ");
932
933 address stack_top;
934 size_t stack_size;
935
936 if (_thread) {
937 stack_top = _thread->stack_base();
938 stack_size = _thread->stack_size();
939 } else {
940 os::current_stack_base_and_size(&stack_top, &stack_size);
941 }
942
943 address stack_bottom = stack_top - stack_size;
944 st->print("[" PTR_FORMAT "," PTR_FORMAT "]", p2i(stack_bottom), p2i(stack_top));
945
946 frame fr = _context ? os::fetch_frame_from_context(_context)
947 : os::current_frame();
948
949 if (fr.sp()) {
950 st->print(", sp=" PTR_FORMAT, p2i(fr.sp()));
951 size_t free_stack_size = pointer_delta(fr.sp(), stack_bottom, 1024);
952 st->print(", free space=%zuk", free_stack_size);
953 }
954
955 st->cr();
956
957 STEP_IF("printing native stack (with source info)", _verbose)
958
959 NativeStackPrinter nsp(_thread, _context, _filename != nullptr ? get_filename_only() : nullptr, _lineno);
960 if (nsp.print_stack(st, buf, sizeof(buf), lastpc,
961 true /*print_source_info */, -1 /* max stack */)) {
962 // We have printed the native stack in platform-specific code
963 // Windows/x64 needs special handling.
964 // Stack walking may get stuck. Try to find the calling code.
965 if (lastpc != nullptr) {
966 const char* name = find_code_name(lastpc);
967 if (name != nullptr) {
968 st->print_cr("The last pc belongs to %s (printed below).", name);
969 }
970 }
971 } else {
972 _print_stack_from_frame_used = true; // frame-based native stack walk done
973 }
974
975 REATTEMPT_STEP_IF("retry printing native stack (no source info)", _verbose)
976 st->cr();
977 st->print_cr("Retrying call stack printing without source information...");
978 NativeStackPrinter nsp(_thread, _context, get_filename_only(), _lineno);
979 nsp.print_stack_from_frame(st, buf, sizeof(buf),
980 false /*print_source_info */, -1 /* max stack */);
981 _print_stack_from_frame_used = true;
982
983 STEP_IF("printing Java stack", _verbose && _thread && _thread->is_Java_thread())
984 if (_verbose && _thread && _thread->is_Java_thread()) {
985 print_stack_trace(st, JavaThread::cast(_thread), buf, sizeof(buf));
986 }
987
988 STEP_IF("printing target Java thread stack",
989 _verbose && _thread != nullptr && (_thread->is_Named_thread()))
990 // printing Java thread stack trace if it is involved in GC crash
991 Thread* thread = ((NamedThread *)_thread)->processed_thread();
992 if (thread != nullptr && thread->is_Java_thread()) {
993 JavaThread* jt = JavaThread::cast(thread);
994 st->print_cr("JavaThread " PTR_FORMAT " (nid = %d) was being processed", p2i(jt), jt->osthread()->thread_id());
995 print_stack_trace(st, jt, buf, sizeof(buf), true);
996 }
997
998 STEP_IF("printing siginfo", _verbose && _siginfo != nullptr)
999 // signal no, signal code, address that caused the fault
1000 st->cr();
1001 os::print_siginfo(st, _siginfo);
1002 st->cr();
1003
1004 STEP_IF("CDS archive access warning", _verbose && _siginfo != nullptr)
1005 // Print an explicit hint if we crashed on access to the CDS archive.
1006 check_failing_cds_access(st, _siginfo);
1007 st->cr();
1008
1009 #if defined(COMPILER1) || defined(COMPILER2)
1010 STEP_IF("printing pending compilation failure",
1011 _verbose && _thread != nullptr && _thread->is_Compiler_thread())
1012 CompilationFailureInfo::print_pending_compilation_failure(st);
1013 if (CompilationMemoryStatistic::enabled() && CompilationMemoryStatistic::in_oom_crash()) {
1014 st->cr();
1015 st->print_cr(">> Please see below for a detailed breakdown of compiler memory usage.");
1016 st->cr();
1017 }
1018 #endif
1019
1020 STEP_IF("printing registers", _verbose && _context != nullptr)
1021 // printing registers
1022 os::print_context(st, _context);
1023 st->cr();
1024
1025 STEP_IF("printing register info",
1026 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1027 continuation = 0;
1028 ResourceMark rm(_thread);
1029 st->print_cr("Register to memory mapping:");
1030 st->cr();
1031 os::print_register_info(st, _context, continuation);
1032 st->cr();
1033
1034 REATTEMPT_STEP_IF("printing register info, attempt 2",
1035 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1036 ResourceMark rm(_thread);
1037 os::print_register_info(st, _context, continuation);
1038 st->cr();
1039
1040 REATTEMPT_STEP_IF("printing register info, attempt 3",
1041 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1042 ResourceMark rm(_thread);
1043 os::print_register_info(st, _context, continuation);
1044 st->cr();
1045
1046 STEP_IF("printing top of stack, instructions near pc", _verbose && _context != nullptr)
1047 // printing top of stack, instructions near pc
1048 os::print_tos_pc(st, _context);
1049 st->cr();
1050
1051 STEP_IF("inspecting top of stack",
1052 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1053 continuation = 0;
1054 ResourceMark rm(_thread);
1055 st->print_cr("Stack slot to memory mapping:");
1056 st->cr();
1057 print_stack_location(st, _context, continuation);
1058 st->cr();
1059
1060 REATTEMPT_STEP_IF("inspecting top of stack, attempt 2",
1061 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1062 ResourceMark rm(_thread);
1063 print_stack_location(st, _context, continuation);
1064 st->cr();
1065
1066 REATTEMPT_STEP_IF("inspecting top of stack, attempt 3",
1067 _verbose && _context != nullptr && _thread != nullptr && Universe::is_fully_initialized())
1068 ResourceMark rm(_thread);
1069 print_stack_location(st, _context, continuation);
1070 st->cr();
1071
1072 STEP_IF("printing lock stack", _verbose && _thread != nullptr && _thread->is_Java_thread() && LockingMode == LM_LIGHTWEIGHT);
1073 st->print_cr("Lock stack of current Java thread (top to bottom):");
1074 JavaThread::cast(_thread)->lock_stack().print_on(st);
1075 st->cr();
1076
1077 STEP_IF("printing code blobs if possible", _verbose)
1078 const int printed_capacity = max_error_log_print_code;
1079 address printed[printed_capacity];
1080 printed[0] = nullptr;
1081 int printed_len = 0;
1082 // Even though ErrorLogPrintCodeLimit is ranged checked
1083 // during argument parsing, there's no way to prevent it
1084 // subsequently (i.e., after parsing) being set to a
1085 // value outside the range.
1086 int limit = MIN2(ErrorLogPrintCodeLimit, printed_capacity);
1087 if (limit > 0) {
1088 // Check if a pc was found by native stack trace above.
1089 if (lastpc != nullptr) {
1090 if (print_code(st, _thread, lastpc, true, printed, printed_capacity)) {
1091 printed_len++;
1092 }
1093 }
1094
1095 // Scan the native stack
1096 if (!_print_stack_from_frame_used) {
1097 // Only try to print code of the crashing frame since
1098 // the native stack cannot be walked with next_frame.
1099 if (print_code(st, _thread, _pc, true, printed, printed_capacity)) {
1100 printed_len++;
1101 }
1102 } else {
1103 frame fr = _context ? os::fetch_frame_from_context(_context)
1104 : os::current_frame();
1105 while (printed_len < limit && fr.pc() != nullptr) {
1106 if (print_code(st, _thread, fr.pc(), fr.pc() == _pc, printed, printed_capacity)) {
1107 printed_len++;
1108 }
1109 fr = frame::next_frame(fr, _thread);
1110 }
1111 }
1112
1113 // Scan the Java stack
1114 if (_thread != nullptr && _thread->is_Java_thread()) {
1115 JavaThread* jt = JavaThread::cast(_thread);
1116 if (jt->has_last_Java_frame()) {
1117 for (StackFrameStream sfs(jt, true /* update */, true /* process_frames */); printed_len < limit && !sfs.is_done(); sfs.next()) {
1118 address pc = sfs.current()->pc();
1119 if (print_code(st, _thread, pc, pc == _pc, printed, printed_capacity)) {
1120 printed_len++;
1121 }
1122 }
1123 }
1124 }
1125 }
1126
1127 STEP_IF("printing VM operation", _verbose && _thread != nullptr && _thread->is_VM_thread())
1128 VMThread* t = (VMThread*)_thread;
1129 VM_Operation* op = t->vm_operation();
1130 if (op) {
1131 op->print_on_error(st);
1132 st->cr();
1133 st->cr();
1134 }
1135
1136 STEP_IF("printing registered callbacks", _verbose && _thread != nullptr);
1137 for (VMErrorCallback* callback = _thread->_vm_error_callbacks;
1138 callback != nullptr;
1139 callback = callback->_next) {
1140 callback->call(st);
1141 st->cr();
1142 }
1143
1144 STEP_IF("printing process", _verbose)
1145 st->cr();
1146 st->print_cr("--------------- P R O C E S S ---------------");
1147 st->cr();
1148
1149 STEP_IF("printing user info", ExtensiveErrorReports && _verbose)
1150 os::print_user_info(st);
1151
1152 STEP_IF("printing all threads", _verbose && _thread != nullptr)
1153 // all threads
1154 Threads::print_on_error(st, _thread, buf, sizeof(buf));
1155 st->cr();
1156
1157 STEP_IF("printing VM state", _verbose)
1158 // Safepoint state
1159 st->print("VM state: ");
1160
1161 if (SafepointSynchronize::is_synchronizing()) st->print("synchronizing");
1162 else if (SafepointSynchronize::is_at_safepoint()) st->print("at safepoint");
1163 else st->print("not at safepoint");
1164
1165 // Also see if error occurred during initialization or shutdown
1166 if (!Universe::is_fully_initialized()) {
1167 st->print(" (not fully initialized)");
1168 } else if (VM_Exit::vm_exited()) {
1169 st->print(" (shutting down)");
1170 } else {
1171 st->print(" (normal execution)");
1172 }
1173 st->cr();
1174 st->cr();
1175
1176 STEP_IF("printing owned locks on error", _verbose)
1177 // mutexes/monitors that currently have an owner
1178 Mutex::print_owned_locks_on_error(st);
1179 st->cr();
1180
1181 STEP_IF("printing number of OutOfMemoryError and StackOverflow exceptions",
1182 _verbose && Exceptions::has_exception_counts())
1183 st->print_cr("OutOfMemory and StackOverflow Exception counts:");
1184 Exceptions::print_exception_counts_on_error(st);
1185 st->cr();
1186
1187 #ifdef _LP64
1188 STEP_IF("printing compressed oops mode", _verbose && UseCompressedOops)
1189 CompressedOops::print_mode(st);
1190 st->cr();
1191
1192 STEP_IF("printing compressed klass pointers mode", _verbose && UseCompressedClassPointers)
1193 CDS_ONLY(MetaspaceShared::print_on(st);)
1194 Metaspace::print_compressed_class_space(st);
1195 CompressedKlassPointers::print_mode(st);
1196 st->cr();
1197 #endif
1198
1199 STEP_IF("printing heap information", _verbose)
1200 GCLogPrecious::print_on_error(st);
1201
1202 if (Universe::heap() != nullptr) {
1203 st->print_cr("Heap:");
1204 StreamIndentor si(st, 1);
1205 Universe::heap()->print_heap_on(st);
1206 st->cr();
1207 }
1208
1209 STEP_IF("printing GC information", _verbose)
1210 if (Universe::heap() != nullptr) {
1211 Universe::heap()->print_gc_on(st);
1212 st->cr();
1213 }
1214
1215 if (Universe::is_fully_initialized()) {
1216 st->print_cr("Polling page: " PTR_FORMAT, p2i(SafepointMechanism::get_polling_page()));
1217 st->cr();
1218 }
1219
1220 STEP_IF("printing metaspace information", _verbose && Universe::is_fully_initialized())
1221 st->print_cr("Metaspace:");
1222 MetaspaceUtils::print_on(st);
1223 MetaspaceUtils::print_basic_report(st, 0);
1224
1225 STEP_IF("printing code cache information", _verbose && Universe::is_fully_initialized())
1226 // print code cache information before vm abort
1227 CodeCache::print_summary(st);
1228 st->cr();
1229
1230 STEP_IF("printing ring buffers", _verbose)
1231 Events::print_all(st);
1232 st->cr();
1233
1234 STEP_IF("printing dynamic libraries", _verbose)
1235 // dynamic libraries, or memory map
1236 os::print_dll_info(st);
1237 st->cr();
1238
1239 #if INCLUDE_JVMTI
1240 STEP_IF("printing jvmti agent info", _verbose)
1241 os::print_jvmti_agent_info(st);
1242 st->cr();
1243 #endif
1244
1245 STEP_IF("printing native decoder state", _verbose)
1246 Decoder::print_state_on(st);
1247 st->cr();
1248
1249 STEP_IF("printing VM options", _verbose)
1250 // VM options
1251 Arguments::print_on(st);
1252 st->cr();
1253
1254 STEP_IF("printing flags", _verbose)
1255 JVMFlag::printFlags(
1256 st,
1257 true, // with comments
1258 false, // no ranges
1259 true); // skip defaults
1260 st->cr();
1261
1262 STEP_IF("printing warning if internal testing API used", WhiteBox::used())
1263 st->print_cr("Unsupported internal testing APIs have been used.");
1264 st->cr();
1265
1266 STEP_IF("printing log configuration", _verbose)
1267 st->print_cr("Logging:");
1268 LogConfiguration::describe_current_configuration(st);
1269 st->cr();
1270
1271 STEP_IF("printing release file content", _verbose)
1272 st->print_cr("Release file:");
1273 os::print_image_release_file(st);
1274
1275 STEP_IF("printing all environment variables", _verbose)
1276 os::print_environment_variables(st, env_list);
1277 st->cr();
1278
1279 STEP_IF("printing locale settings", _verbose)
1280 os::print_active_locale(st);
1281 st->cr();
1282
1283 STEP_IF("printing signal handlers", _verbose)
1284 os::print_signal_handlers(st, buf, sizeof(buf));
1285 st->cr();
1286
1287 STEP_IF("Native Memory Tracking", _verbose)
1288 MemTracker::error_report(st);
1289 st->cr();
1290
1291 STEP_IF("printing compiler memory info, if any", _verbose)
1292 CompilationMemoryStatistic::print_error_report(st);
1293 st->cr();
1294
1295 STEP_IF("printing periodic trim state", _verbose)
1296 NativeHeapTrimmer::print_state(st);
1297 st->cr();
1298
1299 STEP_IF("printing system", _verbose)
1300 st->print_cr("--------------- S Y S T E M ---------------");
1301 st->cr();
1302
1303 STEP_IF("printing OS information", _verbose)
1304 os::print_os_info(st);
1305 st->cr();
1306
1307 STEP_IF("printing CPU info", _verbose)
1308 os::print_cpu_info(st, buf, sizeof(buf));
1309 st->cr();
1310
1311 STEP_IF("printing memory info", _verbose)
1312 os::print_memory_info(st);
1313 st->cr();
1314
1315 STEP_IF("printing internal vm info", _verbose)
1316 st->print_cr("vm_info: %s", VM_Version::internal_vm_info_string());
1317 st->cr();
1318
1319 // print a defined marker to show that error handling finished correctly.
1320 STEP_IF("printing end marker", _verbose)
1321 st->print_cr("END.");
1322
1323 END
1324
1325 # undef BEGIN
1326 # undef STEP_IF
1327 # undef STEP
1328 # undef REATTEMPT_STEP_IF
1329 # undef END
1330 }
1331
1332 // Report for the vm_info_cmd. This prints out the information above omitting
1333 // crash and thread specific information. If output is added above, it should be added
1334 // here also, if it is safe to call during a running process.
1335 void VMError::print_vm_info(outputStream* st) {
1336
1337 char buf[O_BUFLEN];
1338 os::prepare_native_symbols();
1339
1340 report_vm_version(st, buf, sizeof(buf));
1341
1342 // STEP("printing summary")
1343
1344 st->cr();
1345 st->print_cr("--------------- S U M M A R Y ------------");
1346 st->cr();
1347
1348 // STEP("printing VM option summary")
1349
1350 // VM options
1351 Arguments::print_summary_on(st);
1352 st->cr();
1353
1354 // STEP("printing summary machine and OS info")
1355
1356 os::print_summary_info(st, buf, sizeof(buf));
1357
1358 // STEP("printing date and time")
1359
1360 os::print_date_and_time(st, buf, sizeof(buf));
1361
1362 // Skip: STEP("printing thread")
1363
1364 // STEP("printing process")
1365
1366 st->cr();
1367 st->print_cr("--------------- P R O C E S S ---------------");
1368 st->cr();
1369
1370 // STEP("printing number of OutOfMemoryError and StackOverflow exceptions")
1371
1372 if (Exceptions::has_exception_counts()) {
1373 st->print_cr("OutOfMemory and StackOverflow Exception counts:");
1374 Exceptions::print_exception_counts_on_error(st);
1375 st->cr();
1376 }
1377
1378 #ifdef _LP64
1379 // STEP("printing compressed oops mode")
1380 if (UseCompressedOops) {
1381 CompressedOops::print_mode(st);
1382 st->cr();
1383 }
1384
1385 // STEP("printing compressed class ptrs mode")
1386 if (UseCompressedClassPointers) {
1387 CDS_ONLY(MetaspaceShared::print_on(st);)
1388 Metaspace::print_compressed_class_space(st);
1389 CompressedKlassPointers::print_mode(st);
1390 st->cr();
1391 }
1392 #endif
1393
1394 // Take heap lock over heap, GC and metaspace printing so that information
1395 // is consistent.
1396 if (Universe::is_fully_initialized()) {
1397 MutexLocker ml(Heap_lock);
1398
1399 // STEP("printing heap information")
1400
1401 GCLogPrecious::print_on_error(st);
1402
1403 {
1404 st->print_cr("Heap:");
1405 StreamIndentor si(st, 1);
1406 Universe::heap()->print_heap_on(st);
1407 st->cr();
1408 }
1409
1410 // STEP("printing GC information")
1411
1412 Universe::heap()->print_gc_on(st);
1413 st->cr();
1414
1415 st->print_cr("Polling page: " PTR_FORMAT, p2i(SafepointMechanism::get_polling_page()));
1416 st->cr();
1417
1418 // STEP("printing metaspace information")
1419
1420 st->print_cr("Metaspace:");
1421 MetaspaceUtils::print_on(st);
1422 MetaspaceUtils::print_basic_report(st, 0);
1423 }
1424
1425 // STEP("printing code cache information")
1426
1427 if (Universe::is_fully_initialized()) {
1428 // print code cache information before vm abort
1429 CodeCache::print_summary(st);
1430 st->cr();
1431 }
1432
1433 // STEP("printing ring buffers")
1434
1435 Events::print_all(st);
1436 st->cr();
1437
1438 // STEP("printing dynamic libraries")
1439
1440 // dynamic libraries, or memory map
1441 os::print_dll_info(st);
1442 st->cr();
1443
1444 #if INCLUDE_JVMTI
1445 os::print_jvmti_agent_info(st);
1446 st->cr();
1447 #endif
1448
1449 // STEP("printing VM options")
1450
1451 // VM options
1452 Arguments::print_on(st);
1453 st->cr();
1454
1455 // STEP("printing warning if internal testing API used")
1456
1457 if (WhiteBox::used()) {
1458 st->print_cr("Unsupported internal testing APIs have been used.");
1459 st->cr();
1460 }
1461
1462 // STEP("printing log configuration")
1463 st->print_cr("Logging:");
1464 LogConfiguration::describe(st);
1465 st->cr();
1466
1467 // STEP("printing release file content")
1468 st->print_cr("Release file:");
1469 os::print_image_release_file(st);
1470
1471 // STEP("printing all environment variables")
1472
1473 os::print_environment_variables(st, env_list);
1474 st->cr();
1475
1476 // STEP("printing locale settings")
1477
1478 os::print_active_locale(st);
1479 st->cr();
1480
1481
1482 // STEP("printing signal handlers")
1483
1484 os::print_signal_handlers(st, buf, sizeof(buf));
1485 st->cr();
1486
1487 // STEP("Native Memory Tracking")
1488 MemTracker::error_report(st);
1489 st->cr();
1490
1491 // STEP("Compiler Memory Statistic")
1492 CompilationMemoryStatistic::print_final_report(st);
1493
1494 // STEP("printing periodic trim state")
1495 NativeHeapTrimmer::print_state(st);
1496 st->cr();
1497
1498
1499 // STEP("printing system")
1500 st->print_cr("--------------- S Y S T E M ---------------");
1501 st->cr();
1502
1503 // STEP("printing OS information")
1504
1505 os::print_os_info(st);
1506 st->cr();
1507
1508 // STEP("printing CPU info")
1509
1510 os::print_cpu_info(st, buf, sizeof(buf));
1511 st->cr();
1512
1513 // STEP("printing memory info")
1514
1515 os::print_memory_info(st);
1516 st->cr();
1517
1518 // STEP("printing internal vm info")
1519
1520 st->print_cr("vm_info: %s", VM_Version::internal_vm_info_string());
1521 st->cr();
1522
1523 // print a defined marker to show that error handling finished correctly.
1524 // STEP("printing end marker")
1525
1526 st->print_cr("END.");
1527 }
1528
1529 /** Expand a pattern into a buffer starting at pos and open a file using constructed path */
1530 static int expand_and_open(const char* pattern, bool overwrite_existing, char* buf, size_t buflen, size_t pos) {
1531 int fd = -1;
1532 int mode = O_RDWR | O_CREAT;
1533 if (overwrite_existing) {
1534 mode |= O_TRUNC;
1535 } else {
1536 mode |= O_EXCL;
1537 }
1538 if (Arguments::copy_expand_pid(pattern, strlen(pattern), &buf[pos], buflen - pos)) {
1539 fd = open(buf, mode, 0666);
1540 }
1541 return fd;
1542 }
1543
1544 /**
1545 * Construct file name for a log file and return it's file descriptor.
1546 * Name and location depends on pattern, default_pattern params and access
1547 * permissions.
1548 */
1549 int VMError::prepare_log_file(const char* pattern, const char* default_pattern, bool overwrite_existing, char* buf, size_t buflen) {
1550 int fd = -1;
1551
1552 // If possible, use specified pattern to construct log file name
1553 if (pattern != nullptr) {
1554 fd = expand_and_open(pattern, overwrite_existing, buf, buflen, 0);
1555 }
1556
1557 // Either user didn't specify, or the user's location failed,
1558 // so use the default name in the current directory
1559 if (fd == -1) {
1560 const char* cwd = os::get_current_directory(buf, buflen);
1561 if (cwd != nullptr) {
1562 size_t pos = strlen(cwd);
1563 int fsep_len = jio_snprintf(&buf[pos], buflen-pos, "%s", os::file_separator());
1564 pos += fsep_len;
1565 if (fsep_len > 0) {
1566 fd = expand_and_open(default_pattern, overwrite_existing, buf, buflen, pos);
1567 }
1568 }
1569 }
1570
1571 // try temp directory if it exists.
1572 if (fd == -1) {
1573 const char* tmpdir = os::get_temp_directory();
1574 if (tmpdir != nullptr && strlen(tmpdir) > 0) {
1575 int pos = jio_snprintf(buf, buflen, "%s%s", tmpdir, os::file_separator());
1576 if (pos > 0) {
1577 fd = expand_and_open(default_pattern, overwrite_existing, buf, buflen, pos);
1578 }
1579 }
1580 }
1581
1582 return fd;
1583 }
1584
1585 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, const void* siginfo,
1586 const void* context, const char* detail_fmt, ...)
1587 {
1588 va_list detail_args;
1589 va_start(detail_args, detail_fmt);
1590 report_and_die(sig, nullptr, detail_fmt, detail_args, thread, pc, siginfo, context, nullptr, 0, 0);
1591 va_end(detail_args);
1592 }
1593
1594 void VMError::report_and_die(Thread* thread, const void* context, const char* filename, int lineno, const char* message,
1595 const char* detail_fmt, ...) {
1596 va_list detail_args;
1597 va_start(detail_args, detail_fmt);
1598 report_and_die(thread, context, filename, lineno, message, detail_fmt, detail_args);
1599 va_end(detail_args);
1600 }
1601
1602 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, const void* siginfo, const void* context)
1603 {
1604 if (ExecutingUnitTests) {
1605 // See TEST_VM_CRASH_SIGNAL gtest macro
1606 char tmp[64];
1607 fprintf(stderr, "signaled: %s", os::exception_name(sig, tmp, sizeof(tmp)));
1608 }
1609
1610 report_and_die(thread, sig, pc, siginfo, context, "%s", "");
1611 }
1612
1613 void VMError::report_and_die(Thread* thread, const void* context, const char* filename, int lineno, const char* message,
1614 const char* detail_fmt, va_list detail_args)
1615 {
1616 report_and_die(INTERNAL_ERROR, message, detail_fmt, detail_args, thread, nullptr, nullptr, context, filename, lineno, 0);
1617 }
1618
1619 void VMError::report_and_die(Thread* thread, const char* filename, int lineno, size_t size,
1620 VMErrorType vm_err_type, const char* detail_fmt, va_list detail_args) {
1621 report_and_die(vm_err_type, nullptr, detail_fmt, detail_args, thread, nullptr, nullptr, nullptr, filename, lineno, size);
1622 }
1623
1624 void VMError::report_and_die(int id, const char* message, const char* detail_fmt, va_list detail_args,
1625 Thread* thread, address pc, const void* siginfo, const void* context, const char* filename,
1626 int lineno, size_t size)
1627 {
1628 // A single scratch buffer to be used from here on.
1629 // Do not rely on it being preserved across function calls.
1630 static char buffer[O_BUFLEN];
1631
1632 // File descriptor to tty to print an error summary to.
1633 // Hard wired to stdout; see JDK-8215004 (compatibility concerns).
1634 static const int fd_out = 1; // stdout
1635
1636 // File descriptor to the error log file.
1637 static int fd_log = -1;
1638
1639 #ifdef CAN_SHOW_REGISTERS_ON_ASSERT
1640 // Disarm assertion poison page, since from this point on we do not need this mechanism anymore and it may
1641 // cause problems in error handling during native OOM, see JDK-8227275.
1642 disarm_assert_poison();
1643 #endif
1644
1645 // Use local fdStream objects only. Do not use global instances whose initialization
1646 // relies on dynamic initialization (see JDK-8214975). Do not rely on these instances
1647 // to carry over into recursions or invocations from other threads.
1648 fdStream out(fd_out);
1649 out.set_scratch_buffer(buffer, sizeof(buffer));
1650
1651 // Depending on the re-entrance depth at this point, fd_log may be -1 or point to an open hs-err file.
1652 fdStream log(fd_log);
1653 log.set_scratch_buffer(buffer, sizeof(buffer));
1654
1655 // How many errors occurred in error handler when reporting first_error.
1656 static int recursive_error_count;
1657
1658 // We will first print a brief message to standard out (verbose = false),
1659 // then save detailed information in log file (verbose = true).
1660 static bool out_done = false; // done printing to standard out
1661 static bool log_done = false; // done saving error log
1662
1663 intptr_t mytid = os::current_thread_id();
1664 if (_first_error_tid == -1 &&
1665 Atomic::cmpxchg(&_first_error_tid, (intptr_t)-1, mytid) == -1) {
1666
1667 if (SuppressFatalErrorMessage) {
1668 os::abort(CreateCoredumpOnCrash);
1669 }
1670
1671 // Initialize time stamps to use the same base.
1672 out.time_stamp().update_to(1);
1673 log.time_stamp().update_to(1);
1674
1675 _id = id;
1676 _message = message;
1677 _thread = thread;
1678 _pc = pc;
1679 _siginfo = siginfo;
1680 _context = context;
1681 _filename = filename;
1682 _lineno = lineno;
1683 _size = size;
1684 jio_vsnprintf(_detail_msg, sizeof(_detail_msg), detail_fmt, detail_args);
1685
1686 reporting_started();
1687 if (!TestUnresponsiveErrorHandler) {
1688 // Record reporting_start_time unless we're running the
1689 // TestUnresponsiveErrorHandler test. For that test we record
1690 // reporting_start_time at the beginning of the test.
1691 record_reporting_start_time();
1692 } else {
1693 out.print_raw_cr("Delaying recording reporting_start_time for TestUnresponsiveErrorHandler.");
1694 }
1695
1696 if (ShowMessageBoxOnError || PauseAtExit) {
1697 show_message_box(buffer, sizeof(buffer));
1698
1699 // User has asked JVM to abort. Reset ShowMessageBoxOnError so the
1700 // WatcherThread can kill JVM if the error handler hangs.
1701 ShowMessageBoxOnError = false;
1702 }
1703
1704 os::check_core_dump_prerequisites(buffer, sizeof(buffer));
1705
1706 // reset signal handlers or exception filter; make sure recursive crashes
1707 // are handled properly.
1708 install_secondary_signal_handler();
1709 } else {
1710 // This is not the first error, see if it happened in a different thread
1711 // or in the same thread during error reporting.
1712 if (_first_error_tid != mytid) {
1713 if (!SuppressFatalErrorMessage) {
1714 char msgbuf[64];
1715 jio_snprintf(msgbuf, sizeof(msgbuf),
1716 "[thread %zd also had an error]",
1717 mytid);
1718 out.print_raw_cr(msgbuf);
1719 }
1720
1721 // Error reporting is not MT-safe, nor can we let the current thread
1722 // proceed, so we block it.
1723 os::infinite_sleep();
1724
1725 } else {
1726 if (recursive_error_count++ > 30) {
1727 if (!SuppressFatalErrorMessage) {
1728 out.print_raw_cr("[Too many errors, abort]");
1729 }
1730 os::die();
1731 }
1732
1733 if (SuppressFatalErrorMessage) {
1734 // If we already hit a secondary error during abort, then calling
1735 // it again is likely to hit another one. But eventually, if we
1736 // don't deadlock somewhere, we will call os::die() above.
1737 os::abort(CreateCoredumpOnCrash);
1738 }
1739
1740 outputStream* const st = log.is_open() ? &log : &out;
1741 st->cr();
1742
1743 // Timeout handling.
1744 if (_step_did_timeout) {
1745 // The current step had a timeout. Lets continue reporting with the next step.
1746 st->print_raw("[timeout occurred during error reporting in step \"");
1747 st->print_raw(_current_step_info);
1748 st->print_cr("\"] after " INT64_FORMAT " s.",
1749 (int64_t)
1750 ((get_current_timestamp() - _step_start_time) / TIMESTAMP_TO_SECONDS_FACTOR));
1751 } else if (_reporting_did_timeout) {
1752 // We hit ErrorLogTimeout. Reporting will stop altogether. Let's wrap things
1753 // up, the process is about to be stopped by the WatcherThread.
1754 st->print_cr("------ Timeout during error reporting after " INT64_FORMAT " s. ------",
1755 (int64_t)
1756 ((get_current_timestamp() - _reporting_start_time) / TIMESTAMP_TO_SECONDS_FACTOR));
1757 st->flush();
1758 // Watcherthread is about to call os::die. Lets just wait.
1759 os::infinite_sleep();
1760 } else {
1761 // A secondary error happened. Print brief information, but take care, since crashing
1762 // here would just recurse endlessly.
1763 // Any information (signal, context, siginfo etc) printed here should use the function
1764 // arguments, not the information stored in *this, since those describe the primary crash.
1765 static char tmp[256]; // cannot use global scratch buffer
1766 // Note: this string does get parsed by a number of jtreg tests,
1767 // see hotspot/jtreg/runtime/ErrorHandling.
1768 st->print("[error occurred during error reporting (%s), id 0x%x",
1769 _current_step_info, id);
1770 if (os::exception_name(id, tmp, sizeof(tmp))) {
1771 st->print(", %s (0x%x) at pc=" PTR_FORMAT, tmp, id, p2i(pc));
1772 } else {
1773 if (should_report_bug(id)) {
1774 st->print(", Internal Error (%s:%d)",
1775 filename == nullptr ? "??" : filename, lineno);
1776 } else {
1777 st->print(", Out of Memory Error (%s:%d)",
1778 filename == nullptr ? "??" : filename, lineno);
1779 }
1780 }
1781 st->print_cr("]");
1782 if (ErrorLogSecondaryErrorDetails) {
1783 static bool recursed = false;
1784 if (!recursed) {
1785 recursed = true;
1786 // Print even more information for secondary errors. This may generate a lot of output
1787 // and possibly disturb error reporting, therefore its optional and only available in debug builds.
1788 if (siginfo != nullptr) {
1789 st->print("[");
1790 os::print_siginfo(st, siginfo);
1791 st->print_cr("]");
1792 }
1793 st->print("[stack: ");
1794 NativeStackPrinter nsp(_thread, context, _filename != nullptr ? get_filename_only() : nullptr, _lineno);
1795 // Subsequent secondary errors build up stack; to avoid flooding the hs-err file with irrelevant
1796 // call stacks, limit the stack we print here (we are only interested in what happened before the
1797 // last assert/fault).
1798 const int max_stack_size = 15;
1799 nsp.print_stack_from_frame(st, tmp, sizeof(tmp), true /* print_source_info */, max_stack_size);
1800 st->print_cr("]");
1801 } // !recursed
1802 recursed = false; // Note: reset outside !recursed
1803 }
1804 }
1805 }
1806 }
1807
1808 // Part 1: print an abbreviated version (the '#' section) to stdout.
1809 if (!out_done) {
1810 // Suppress this output if we plan to print Part 2 to stdout too.
1811 // No need to have the "#" section twice.
1812 if (!(ErrorFileToStdout && out.fd() == 1)) {
1813 report(&out, false);
1814 }
1815
1816 out_done = true;
1817
1818 _current_step = 0;
1819 _current_step_info = "";
1820 }
1821
1822 // Part 2: print a full error log file (optionally to stdout or stderr).
1823 // print to error log file
1824 if (!log_done) {
1825 // see if log file is already open
1826 if (!log.is_open()) {
1827 // open log file
1828 if (ErrorFileToStdout) {
1829 fd_log = 1;
1830 } else if (ErrorFileToStderr) {
1831 fd_log = 2;
1832 } else {
1833 fd_log = prepare_log_file(ErrorFile, "hs_err_pid%p.log", true,
1834 buffer, sizeof(buffer));
1835 if (fd_log != -1) {
1836 out.print_raw("# An error report file with more information is saved as:\n# ");
1837 out.print_raw_cr(buffer);
1838 } else {
1839 out.print_raw_cr("# Can not save log file, dump to screen..");
1840 fd_log = 1;
1841 }
1842 }
1843 log.set_fd(fd_log);
1844 }
1845
1846 report(&log, true);
1847 log_done = true;
1848 _current_step = 0;
1849 _current_step_info = "";
1850
1851 if (fd_log > 3) {
1852 ::close(fd_log);
1853 fd_log = -1;
1854 }
1855
1856 log.set_fd(-1);
1857 }
1858
1859 JFR_ONLY(Jfr::on_vm_shutdown(true);)
1860
1861 if (PrintNMTStatistics) {
1862 fdStream fds(fd_out);
1863 MemTracker::final_report(&fds);
1864 }
1865
1866 static bool skip_replay = ReplayCompiles && !ReplayReduce; // Do not overwrite file during replay
1867 if (DumpReplayDataOnError && _thread && _thread->is_Compiler_thread() && !skip_replay) {
1868 skip_replay = true;
1869 ciEnv* env = ciEnv::current();
1870 if (env != nullptr && env->task() != nullptr) {
1871 const bool overwrite = false; // We do not overwrite an existing replay file.
1872 int fd = prepare_log_file(ReplayDataFile, "replay_pid%p.log", overwrite, buffer, sizeof(buffer));
1873 if (fd != -1) {
1874 FILE* replay_data_file = os::fdopen(fd, "w");
1875 if (replay_data_file != nullptr) {
1876 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1877 env->dump_replay_data_unsafe(&replay_data_stream);
1878 out.print_raw("#\n# Compiler replay data is saved as:\n# ");
1879 out.print_raw_cr(buffer);
1880 } else {
1881 int e = errno;
1882 out.print_raw("#\n# Can't open file to dump replay data. Error: ");
1883 out.print_raw_cr(os::strerror(e));
1884 close(fd);
1885 }
1886 }
1887 }
1888 }
1889
1890 #if INCLUDE_JVMCI
1891 if (JVMCI::fatal_log_filename() != nullptr) {
1892 out.print_raw("#\n# The JVMCI shared library error report file is saved as:\n# ");
1893 out.print_raw_cr(JVMCI::fatal_log_filename());
1894 }
1895 #endif
1896
1897 static bool skip_bug_url = !should_submit_bug_report(_id);
1898 if (!skip_bug_url) {
1899 skip_bug_url = true;
1900
1901 out.print_raw_cr("#");
1902 print_bug_submit_message(&out, _thread);
1903 }
1904
1905 static bool skip_OnError = false;
1906 if (!skip_OnError && OnError && OnError[0]) {
1907 skip_OnError = true;
1908
1909 // Flush output and finish logs before running OnError commands.
1910 ostream_abort();
1911
1912 out.print_raw_cr("#");
1913 out.print_raw ("# -XX:OnError=\"");
1914 out.print_raw (OnError);
1915 out.print_raw_cr("\"");
1916
1917 char* cmd;
1918 const char* ptr = OnError;
1919 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != nullptr){
1920 out.print_raw ("# Executing ");
1921 #if defined(LINUX) || defined(_ALLBSD_SOURCE)
1922 out.print_raw ("/bin/sh -c ");
1923 #elif defined(_WINDOWS)
1924 out.print_raw ("cmd /C ");
1925 #endif
1926 out.print_raw ("\"");
1927 out.print_raw (cmd);
1928 out.print_raw_cr("\" ...");
1929
1930 if (os::fork_and_exec(cmd) < 0) {
1931 out.print_cr("os::fork_and_exec failed: %s (%s=%d)",
1932 os::strerror(errno), os::errno_name(errno), errno);
1933 }
1934 }
1935
1936 // done with OnError
1937 OnError = nullptr;
1938 }
1939
1940 #if defined _WINDOWS
1941 if (UseOSErrorReporting) {
1942 raise_fail_fast(_siginfo, _context);
1943 }
1944 #endif // _WINDOWS
1945
1946 // os::abort() will call abort hooks, try it first.
1947 static bool skip_os_abort = false;
1948 if (!skip_os_abort) {
1949 skip_os_abort = true;
1950 bool dump_core = should_report_bug(_id);
1951 os::abort(dump_core && CreateCoredumpOnCrash, _siginfo, _context);
1952 // if os::abort() doesn't abort, try os::die();
1953 }
1954 os::die();
1955 }
1956
1957 /*
1958 * OnOutOfMemoryError scripts/commands executed while VM is a safepoint - this
1959 * ensures utilities such as jmap can observe the process is a consistent state.
1960 */
1961 class VM_ReportJavaOutOfMemory : public VM_Operation {
1962 private:
1963 const char* _message;
1964 public:
1965 VM_ReportJavaOutOfMemory(const char* message) { _message = message; }
1966 VMOp_Type type() const { return VMOp_ReportJavaOutOfMemory; }
1967 void doit();
1968 };
1969
1970 void VM_ReportJavaOutOfMemory::doit() {
1971 // Don't allocate large buffer on stack
1972 static char buffer[O_BUFLEN];
1973
1974 tty->print_cr("#");
1975 tty->print_cr("# java.lang.OutOfMemoryError: %s", _message);
1976 tty->print_cr("# -XX:OnOutOfMemoryError=\"%s\"", OnOutOfMemoryError);
1977
1978 // make heap parsability
1979 Universe::heap()->ensure_parsability(false); // no need to retire TLABs
1980
1981 char* cmd;
1982 const char* ptr = OnOutOfMemoryError;
1983 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != nullptr){
1984 tty->print("# Executing ");
1985 #if defined(LINUX)
1986 tty->print ("/bin/sh -c ");
1987 #endif
1988 tty->print_cr("\"%s\"...", cmd);
1989
1990 if (os::fork_and_exec(cmd) < 0) {
1991 tty->print_cr("os::fork_and_exec failed: %s (%s=%d)",
1992 os::strerror(errno), os::errno_name(errno), errno);
1993 }
1994 }
1995 }
1996
1997 void VMError::report_java_out_of_memory(const char* message) {
1998 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
1999 MutexLocker ml(Heap_lock);
2000 VM_ReportJavaOutOfMemory op(message);
2001 VMThread::execute(&op);
2002 }
2003 }
2004
2005 void VMError::show_message_box(char *buf, int buflen) {
2006 bool yes;
2007 do {
2008 error_string(buf, buflen);
2009 yes = os::start_debugging(buf,buflen);
2010 } while (yes);
2011 }
2012
2013 // Fatal error handling is subject to several timeouts:
2014 // - a global timeout (controlled via ErrorLogTimeout)
2015 // - local error reporting step timeouts.
2016 //
2017 // The latter aims to "give the JVM a kick" if it gets stuck in one particular place during
2018 // error reporting. This prevents one error reporting step from hogging all the time allotted
2019 // to error reporting under ErrorLogTimeout.
2020 //
2021 // VMError::check_timeout() is called from the watcher thread and checks for either global
2022 // or step timeout. If a timeout happened, we interrupt the reporting thread and set either
2023 // _reporting_did_timeout or _step_did_timeout to signal which timeout fired. Function returns
2024 // true if the *global* timeout fired, which will cause WatcherThread to shut down the JVM
2025 // immediately.
2026 bool VMError::check_timeout() {
2027
2028 // This function is supposed to be called from watcher thread during fatal error handling only.
2029 assert(VMError::is_error_reported(), "Only call during error handling");
2030 assert(Thread::current()->is_Watcher_thread(), "Only call from watcher thread");
2031
2032 if (ErrorLogTimeout == 0) {
2033 return false;
2034 }
2035
2036 // There are three situations where we suppress the *global* error timeout:
2037 // - if the JVM is embedded and the launcher has its abort hook installed.
2038 // That must be allowed to run.
2039 // - if the user specified one or more OnError commands to run, and these
2040 // did not yet run. These must have finished.
2041 // - if the user (typically developer) specified ShowMessageBoxOnError,
2042 // and the error box has not yet been shown
2043 const bool ignore_global_timeout =
2044 (ShowMessageBoxOnError
2045 || (OnError != nullptr && OnError[0] != '\0')
2046 || Arguments::abort_hook() != nullptr);
2047
2048 const jlong now = get_current_timestamp();
2049
2050 // Global timeout hit?
2051 if (!ignore_global_timeout) {
2052 const jlong reporting_start_time = get_reporting_start_time();
2053 // Timestamp is stored in nanos.
2054 if (reporting_start_time > 0) {
2055 const jlong end = reporting_start_time + (jlong)ErrorLogTimeout * TIMESTAMP_TO_SECONDS_FACTOR;
2056 if (end <= now && !_reporting_did_timeout) {
2057 // We hit ErrorLogTimeout and we haven't interrupted the reporting
2058 // thread yet.
2059 _reporting_did_timeout = true;
2060 interrupt_reporting_thread();
2061 return true; // global timeout
2062 }
2063 }
2064 }
2065
2066 // Reporting step timeout?
2067 const jlong step_start_time = get_step_start_time();
2068 if (step_start_time > 0) {
2069 // A step times out after a quarter of the total timeout. Steps are mostly fast unless they
2070 // hang for some reason, so this simple rule allows for three hanging step and still
2071 // hopefully leaves time enough for the rest of the steps to finish.
2072 const int max_step_timeout_secs = 5;
2073 const jlong timeout_duration = MAX2((jlong)max_step_timeout_secs, (jlong)ErrorLogTimeout * TIMESTAMP_TO_SECONDS_FACTOR / 4);
2074 const jlong end = step_start_time + timeout_duration;
2075 if (end <= now && !_step_did_timeout) {
2076 // The step timed out and we haven't interrupted the reporting
2077 // thread yet.
2078 _step_did_timeout = true;
2079 interrupt_reporting_thread();
2080 return false; // (Not a global timeout)
2081 }
2082 }
2083
2084 return false;
2085
2086 }
2087
2088 #ifdef ASSERT
2089 typedef void (*voidfun_t)();
2090
2091 // Crash with an authentic sigfpe; behavior is subtly different from a real signal
2092 // compared to one generated with raise (asynchronous vs synchronous). See JDK-8065895.
2093 volatile int sigfpe_int = 0;
2094
2095 ATTRIBUTE_NO_UBSAN
2096 static void ALWAYSINLINE crash_with_sigfpe() {
2097
2098 // generate a native synchronous SIGFPE where possible;
2099 sigfpe_int = sigfpe_int/sigfpe_int;
2100
2101 // if that did not cause a signal (e.g. on ppc), just
2102 // raise the signal.
2103 #ifndef _WIN32
2104 // OSX implements raise(sig) incorrectly so we need to
2105 // explicitly target the current thread
2106 pthread_kill(pthread_self(), SIGFPE);
2107 #endif
2108
2109 } // end: crash_with_sigfpe
2110
2111 // crash with sigsegv at non-null address.
2112 static void ALWAYSINLINE crash_with_segfault() {
2113
2114 int* crash_addr = reinterpret_cast<int*>(VMError::segfault_address);
2115 *crash_addr = 1;
2116
2117 } // end: crash_with_segfault
2118
2119 // crash in a controlled way:
2120 // 1 - assert
2121 // 2 - guarantee
2122 // 14 - SIGSEGV
2123 // 15 - SIGFPE
2124 void VMError::controlled_crash(int how) {
2125
2126 // Case 14 is tested by test/hotspot/jtreg/runtime/ErrorHandling/SafeFetchInErrorHandlingTest.java.
2127 // Case 15 is tested by test/hotspot/jtreg/runtime/ErrorHandling/SecondaryErrorTest.java.
2128 // Case 16 is tested by test/hotspot/jtreg/runtime/ErrorHandling/ThreadsListHandleInErrorHandlingTest.java.
2129 // Case 17 is tested by test/hotspot/jtreg/runtime/ErrorHandling/NestedThreadsListHandleInErrorHandlingTest.java.
2130
2131 // We try to grab Threads_lock to keep ThreadsSMRSupport::print_info_on()
2132 // from racing with Threads::add() or Threads::remove() as we
2133 // generate the hs_err_pid file. This makes our ErrorHandling tests
2134 // more stable.
2135 if (!Threads_lock->owned_by_self()) {
2136 Threads_lock->try_lock();
2137 // The VM is going to die so no need to unlock Thread_lock.
2138 }
2139
2140 switch (how) {
2141 case 1: assert(how == 0, "test assert"); break;
2142 case 2: guarantee(how == 0, "test guarantee"); break;
2143
2144 // The other cases are unused.
2145 case 14: crash_with_segfault(); break;
2146 case 15: crash_with_sigfpe(); break;
2147 case 16: {
2148 ThreadsListHandle tlh;
2149 fatal("Force crash with an active ThreadsListHandle.");
2150 }
2151 case 17: {
2152 ThreadsListHandle tlh;
2153 {
2154 ThreadsListHandle tlh2;
2155 fatal("Force crash with a nested ThreadsListHandle.");
2156 }
2157 }
2158 default:
2159 // If another number is given, give a generic crash.
2160 fatal("Crashing with number %d", how);
2161 }
2162 tty->print_cr("controlled_crash: survived intentional crash. Did you suppress the assert?");
2163 ShouldNotReachHere();
2164 }
2165 #endif // !ASSERT
2166
2167 VMErrorCallbackMark::VMErrorCallbackMark(VMErrorCallback* callback)
2168 : _thread(Thread::current()) {
2169 callback->_next = _thread->_vm_error_callbacks;
2170 _thread->_vm_error_callbacks = callback;
2171 }
2172
2173 VMErrorCallbackMark::~VMErrorCallbackMark() {
2174 assert(_thread->_vm_error_callbacks != nullptr, "Popped too far");
2175 _thread->_vm_error_callbacks = _thread->_vm_error_callbacks->_next;
2176 }