1 /*
2 * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2017, 2020 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "jvm.h"
28 #include "cds/metaspaceShared.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/disassembler.hpp"
32 #include "gc/shared/gcConfig.hpp"
33 #include "gc/shared/gcLogPrecious.hpp"
34 #include "logging/logConfiguration.hpp"
35 #include "memory/metaspace.hpp"
36 #include "memory/metaspaceUtils.hpp"
37 #include "memory/resourceArea.inline.hpp"
38 #include "memory/universe.hpp"
39 #include "oops/compressedKlass.hpp"
40 #include "oops/compressedOops.hpp"
41 #include "prims/whitebox.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/atomic.hpp"
44 #include "runtime/frame.inline.hpp"
45 #include "runtime/init.hpp"
46 #include "runtime/os.hpp"
47 #include "runtime/osThread.hpp"
48 #include "runtime/safefetch.inline.hpp"
49 #include "runtime/safepointMechanism.hpp"
50 #include "runtime/stackFrameStream.inline.hpp"
51 #include "runtime/thread.inline.hpp"
52 #include "runtime/threadSMR.hpp"
53 #include "runtime/vmThread.hpp"
54 #include "runtime/vmOperations.hpp"
55 #include "runtime/vm_version.hpp"
56 #include "runtime/flags/jvmFlag.hpp"
57 #include "services/memTracker.hpp"
58 #include "utilities/debug.hpp"
59 #include "utilities/decoder.hpp"
60 #include "utilities/defaultStream.hpp"
61 #include "utilities/events.hpp"
62 #include "utilities/vmError.hpp"
63 #include "utilities/macros.hpp"
64 #if INCLUDE_JFR
65 #include "jfr/jfr.hpp"
66 #endif
67 #if INCLUDE_JVMCI
68 #include "jvmci/jvmci.hpp"
69 #endif
70
71 #ifndef PRODUCT
72 #include <signal.h>
73 #endif // PRODUCT
74
75 bool VMError::coredump_status;
76 char VMError::coredump_message[O_BUFLEN];
77 int VMError::_current_step;
78 const char* VMError::_current_step_info;
79 volatile jlong VMError::_reporting_start_time = -1;
80 volatile bool VMError::_reporting_did_timeout = false;
81 volatile jlong VMError::_step_start_time = -1;
82 volatile bool VMError::_step_did_timeout = false;
83 volatile intptr_t VMError::_first_error_tid = -1;
84 int VMError::_id;
85 const char* VMError::_message;
86 char VMError::_detail_msg[1024];
87 Thread* VMError::_thread;
88 address VMError::_pc;
89 void* VMError::_siginfo;
90 void* VMError::_context;
91 bool VMError::_print_native_stack_used = false;
92 const char* VMError::_filename;
93 int VMError::_lineno;
94 size_t VMError::_size;
95
96 // List of environment variables that should be reported in error log file.
97 static const char* env_list[] = {
98 // All platforms
99 "JAVA_HOME", "JAVA_TOOL_OPTIONS", "_JAVA_OPTIONS", "CLASSPATH",
100 "PATH", "USERNAME",
101
102 // Env variables that are defined on Linux/BSD
103 "LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY",
104 "HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE",
105 "LANG", "LC_ALL", "LC_CTYPE", "TZ",
106
107 // defined on AIX
108 "LIBPATH", "LDR_PRELOAD", "LDR_PRELOAD64",
109
110 // defined on Linux/AIX/BSD
111 "_JAVA_SR_SIGNUM",
112
113 // defined on Darwin
114 "DYLD_LIBRARY_PATH", "DYLD_FALLBACK_LIBRARY_PATH",
115 "DYLD_FRAMEWORK_PATH", "DYLD_FALLBACK_FRAMEWORK_PATH",
116 "DYLD_INSERT_LIBRARIES",
117
118 // defined on Windows
119 "OS", "PROCESSOR_IDENTIFIER", "_ALT_JAVA_HOME_DIR",
120
121 (const char *)0
122 };
123
124 // A simple parser for -XX:OnError, usage:
125 // ptr = OnError;
126 // while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr) != NULL)
127 // ... ...
128 static char* next_OnError_command(char* buf, int buflen, const char** ptr) {
129 if (ptr == NULL || *ptr == NULL) return NULL;
130
131 const char* cmd = *ptr;
132
133 // skip leading blanks or ';'
134 while (*cmd == ' ' || *cmd == ';') cmd++;
135
136 if (*cmd == '\0') return NULL;
137
138 const char * cmdend = cmd;
139 while (*cmdend != '\0' && *cmdend != ';') cmdend++;
140
141 Arguments::copy_expand_pid(cmd, cmdend - cmd, buf, buflen);
142
143 *ptr = (*cmdend == '\0' ? cmdend : cmdend + 1);
144 return buf;
145 }
146
147 static void print_bug_submit_message(outputStream *out, Thread *thread) {
148 if (out == NULL) return;
149 const char *url = Arguments::java_vendor_url_bug();
150 if (url == NULL || *url == '\0')
151 url = JDK_Version::runtime_vendor_vm_bug_url();
152 if (url != NULL && *url != '\0') {
153 out->print_raw_cr("# If you would like to submit a bug report, please visit:");
154 out->print_raw ("# ");
155 out->print_raw_cr(url);
156 }
157 // If the crash is in native code, encourage user to submit a bug to the
158 // provider of that code.
159 if (thread && thread->is_Java_thread() &&
160 !thread->is_hidden_from_external_view()) {
161 if (JavaThread::cast(thread)->thread_state() == _thread_in_native) {
162 out->print_cr("# The crash happened outside the Java Virtual Machine in native code.\n# See problematic frame for where to report the bug.");
163 }
164 }
165 out->print_raw_cr("#");
166 }
167
168 void VMError::record_coredump_status(const char* message, bool status) {
169 coredump_status = status;
170 strncpy(coredump_message, message, sizeof(coredump_message));
171 coredump_message[sizeof(coredump_message)-1] = 0;
172 }
173
174 // Return a string to describe the error
175 char* VMError::error_string(char* buf, int buflen) {
176 char signame_buf[64];
177 const char *signame = os::exception_name(_id, signame_buf, sizeof(signame_buf));
178
179 if (signame) {
180 jio_snprintf(buf, buflen,
181 "%s (0x%x) at pc=" PTR_FORMAT ", pid=%d, tid=" UINTX_FORMAT,
182 signame, _id, _pc,
183 os::current_process_id(), os::current_thread_id());
184 } else if (_filename != NULL && _lineno > 0) {
185 // skip directory names
186 char separator = os::file_separator()[0];
187 const char *p = strrchr(_filename, separator);
188 int n = jio_snprintf(buf, buflen,
189 "Internal Error at %s:%d, pid=%d, tid=" UINTX_FORMAT,
190 p ? p + 1 : _filename, _lineno,
191 os::current_process_id(), os::current_thread_id());
192 if (n >= 0 && n < buflen && _message) {
193 if (strlen(_detail_msg) > 0) {
194 jio_snprintf(buf + n, buflen - n, "%s%s: %s",
195 os::line_separator(), _message, _detail_msg);
196 } else {
197 jio_snprintf(buf + n, buflen - n, "%sError: %s",
198 os::line_separator(), _message);
199 }
200 }
201 } else {
202 jio_snprintf(buf, buflen,
203 "Internal Error (0x%x), pid=%d, tid=" UINTX_FORMAT,
204 _id, os::current_process_id(), os::current_thread_id());
205 }
206
207 return buf;
208 }
209
210 void VMError::print_stack_trace(outputStream* st, JavaThread* jt,
211 char* buf, int buflen, bool verbose) {
212 #ifdef ZERO
213 if (jt->zero_stack()->sp() && jt->top_zero_frame()) {
214 // StackFrameStream uses the frame anchor, which may not have
215 // been set up. This can be done at any time in Zero, however,
216 // so if it hasn't been set up then we just set it up now and
217 // clear it again when we're done.
218 bool has_last_Java_frame = jt->has_last_Java_frame();
219 if (!has_last_Java_frame)
220 jt->set_last_Java_frame();
221 st->print("Java frames:");
222 st->cr();
223
224 // Print the frames
225 StackFrameStream sfs(jt, true /* update */, true /* process_frames */);
226 for(int i = 0; !sfs.is_done(); sfs.next(), i++) {
227 sfs.current()->zero_print_on_error(i, st, buf, buflen);
228 st->cr();
229 }
230
231 // Reset the frame anchor if necessary
232 if (!has_last_Java_frame)
233 jt->reset_last_Java_frame();
234 }
235 #else
236 if (jt->has_last_Java_frame()) {
237 st->print_cr("Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)");
238 for (StackFrameStream sfs(jt, true /* update */, true /* process_frames */); !sfs.is_done(); sfs.next()) {
239 sfs.current()->print_on_error(st, buf, buflen, verbose);
240 st->cr();
241 }
242 }
243 #endif // ZERO
244 }
245
246 /**
247 * Adds `value` to `list` iff it's not already present and there is sufficient
248 * capacity (i.e. length(list) < `list_capacity`). The length of the list
249 * is the index of the first nullptr entry or `list_capacity` if there are
250 * no nullptr entries.
251 *
252 * @ return true if the value was added, false otherwise
253 */
254 static bool add_if_absent(address value, address* list, int list_capacity) {
255 for (int i = 0; i < list_capacity; i++) {
256 if (list[i] == value) {
257 return false;
258 }
259 if (list[i] == nullptr) {
260 list[i] = value;
261 if (i + 1 < list_capacity) {
262 list[i + 1] = nullptr;
263 }
264 return true;
265 }
266 }
267 return false;
268 }
269
270 /**
271 * Prints the VM generated code unit, if any, containing `pc` if it has not already
272 * been printed. If the code unit is an InterpreterCodelet or StubCodeDesc, it is
273 * only printed if `is_crash_pc` is true.
274 *
275 * @param printed array of code units that have already been printed (delimited by NULL entry)
276 * @param printed_capacity the capacity of `printed`
277 * @return true if the code unit was printed, false otherwise
278 */
279 static bool print_code(outputStream* st, Thread* thread, address pc, bool is_crash_pc,
280 address* printed, int printed_capacity) {
281 if (Interpreter::contains(pc)) {
282 if (is_crash_pc) {
283 // The interpreter CodeBlob is very large so try to print the codelet instead.
284 InterpreterCodelet* codelet = Interpreter::codelet_containing(pc);
285 if (codelet != nullptr) {
286 if (add_if_absent((address) codelet, printed, printed_capacity)) {
287 codelet->print_on(st);
288 Disassembler::decode(codelet->code_begin(), codelet->code_end(), st);
289 return true;
290 }
291 }
292 }
293 } else {
294 StubCodeDesc* desc = StubCodeDesc::desc_for(pc);
295 if (desc != nullptr) {
296 if (is_crash_pc) {
297 if (add_if_absent((address) desc, printed, printed_capacity)) {
298 desc->print_on(st);
299 Disassembler::decode(desc->begin(), desc->end(), st);
300 return true;
301 }
302 }
303 } else if (thread != nullptr) {
304 CodeBlob* cb = CodeCache::find_blob(pc);
305 if (cb != nullptr && add_if_absent((address) cb, printed, printed_capacity)) {
306 // Disassembling nmethod will incur resource memory allocation,
307 // only do so when thread is valid.
308 ResourceMark rm(thread);
309 Disassembler::decode(cb, st);
310 st->cr();
311 return true;
312 }
313 }
314 }
315 return false;
316 }
317
318 /**
319 * Gets the caller frame of `fr`.
320 *
321 * @returns an invalid frame (i.e. fr.pc() === 0) if the caller cannot be obtained
322 */
323 static frame next_frame(frame fr, Thread* t) {
324 // Compiled code may use EBP register on x86 so it looks like
325 // non-walkable C frame. Use frame.sender() for java frames.
326 frame invalid;
327 if (t != nullptr && t->is_Java_thread()) {
328 // Catch very first native frame by using stack address.
329 // For JavaThread stack_base and stack_size should be set.
330 if (!t->is_in_full_stack((address)(fr.real_fp() + 1))) {
331 return invalid;
332 }
333 if (fr.is_java_frame() || fr.is_native_frame() || fr.is_runtime_frame()) {
334 RegisterMap map(JavaThread::cast(t), false); // No update
335 return fr.sender(&map);
336 } else {
337 // is_first_C_frame() does only simple checks for frame pointer,
338 // it will pass if java compiled code has a pointer in EBP.
339 if (os::is_first_C_frame(&fr)) return invalid;
340 return os::get_sender_for_C_frame(&fr);
341 }
342 } else {
343 if (os::is_first_C_frame(&fr)) return invalid;
344 return os::get_sender_for_C_frame(&fr);
345 }
346 }
347
348 void VMError::print_native_stack(outputStream* st, frame fr, Thread* t, char* buf, int buf_size) {
349
350 // see if it's a valid frame
351 if (fr.pc()) {
352 st->print_cr("Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)");
353
354 int count = 0;
355 while (count++ < StackPrintLimit) {
356 fr.print_on_error(st, buf, buf_size);
357 if (fr.pc()) { // print source file and line, if available
358 char buf[128];
359 int line_no;
360 if (Decoder::get_source_info(fr.pc(), buf, sizeof(buf), &line_no)) {
361 st->print(" (%s:%d)", buf, line_no);
362 }
363 }
364 st->cr();
365 fr = next_frame(fr, t);
366 if (fr.pc() == nullptr) {
367 break;
368 }
369 }
370
371 if (count > StackPrintLimit) {
372 st->print_cr("...<more frames>...");
373 }
374
375 st->cr();
376 }
377 }
378
379 static void print_oom_reasons(outputStream* st) {
380 st->print_cr("# Possible reasons:");
381 st->print_cr("# The system is out of physical RAM or swap space");
382 if (UseCompressedOops) {
383 st->print_cr("# The process is running with CompressedOops enabled, and the Java Heap may be blocking the growth of the native heap");
384 }
385 if (LogBytesPerWord == 2) {
386 st->print_cr("# In 32 bit mode, the process size limit was hit");
387 }
388 st->print_cr("# Possible solutions:");
389 st->print_cr("# Reduce memory load on the system");
390 st->print_cr("# Increase physical memory or swap space");
391 st->print_cr("# Check if swap backing store is full");
392 if (LogBytesPerWord == 2) {
393 st->print_cr("# Use 64 bit Java on a 64 bit OS");
394 }
395 st->print_cr("# Decrease Java heap size (-Xmx/-Xms)");
396 st->print_cr("# Decrease number of Java threads");
397 st->print_cr("# Decrease Java thread stack sizes (-Xss)");
398 st->print_cr("# Set larger code cache with -XX:ReservedCodeCacheSize=");
399 if (UseCompressedOops) {
400 switch (CompressedOops::mode()) {
401 case CompressedOops::UnscaledNarrowOop:
402 st->print_cr("# JVM is running with Unscaled Compressed Oops mode in which the Java heap is");
403 st->print_cr("# placed in the first 4GB address space. The Java Heap base address is the");
404 st->print_cr("# maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
405 st->print_cr("# to set the Java Heap base and to place the Java Heap above 4GB virtual address.");
406 break;
407 case CompressedOops::ZeroBasedNarrowOop:
408 st->print_cr("# JVM is running with Zero Based Compressed Oops mode in which the Java heap is");
409 st->print_cr("# placed in the first 32GB address space. The Java Heap base address is the");
410 st->print_cr("# maximum limit for the native heap growth. Please use -XX:HeapBaseMinAddress");
411 st->print_cr("# to set the Java Heap base and to place the Java Heap above 32GB virtual address.");
412 break;
413 default:
414 break;
415 }
416 }
417 st->print_cr("# This output file may be truncated or incomplete.");
418 }
419
420 static void report_vm_version(outputStream* st, char* buf, int buflen) {
421 // VM version
422 st->print_cr("#");
423 JDK_Version::current().to_string(buf, buflen);
424 const char* runtime_name = JDK_Version::runtime_name() != NULL ?
425 JDK_Version::runtime_name() : "";
426 const char* runtime_version = JDK_Version::runtime_version() != NULL ?
427 JDK_Version::runtime_version() : "";
428 const char* vendor_version = JDK_Version::runtime_vendor_version() != NULL ?
429 JDK_Version::runtime_vendor_version() : "";
430 const char* jdk_debug_level = VM_Version::printable_jdk_debug_level() != NULL ?
431 VM_Version::printable_jdk_debug_level() : "";
432
433 st->print_cr("# JRE version: %s%s%s (%s) (%sbuild %s)", runtime_name,
434 (*vendor_version != '\0') ? " " : "", vendor_version,
435 buf, jdk_debug_level, runtime_version);
436
437 // This is the long version with some default settings added
438 st->print_cr("# Java VM: %s%s%s (%s%s, %s%s%s%s%s%s, %s, %s)",
439 VM_Version::vm_name(),
440 (*vendor_version != '\0') ? " " : "", vendor_version,
441 jdk_debug_level,
442 VM_Version::vm_release(),
443 VM_Version::vm_info_string(),
444 TieredCompilation ? ", tiered" : "",
445 #if INCLUDE_JVMCI
446 EnableJVMCI ? ", jvmci" : "",
447 UseJVMCICompiler ? ", jvmci compiler" : "",
448 #else
449 "", "",
450 #endif
451 UseCompressedOops ? ", compressed oops" : "",
452 UseCompressedClassPointers ? ", compressed class ptrs" : "",
453 GCConfig::hs_err_name(),
454 VM_Version::vm_platform_string()
455 );
456 }
457
458 // Returns true if at least one thread reported a fatal error and fatal error handling is in process.
459 bool VMError::is_error_reported() {
460 return _first_error_tid != -1;
461 }
462
463 // Returns true if the current thread reported a fatal error.
464 bool VMError::is_error_reported_in_current_thread() {
465 return _first_error_tid == os::current_thread_id();
466 }
467
468 // Helper, return current timestamp for timeout handling.
469 jlong VMError::get_current_timestamp() {
470 return os::javaTimeNanos();
471 }
472 // Factor to translate the timestamp to seconds.
473 #define TIMESTAMP_TO_SECONDS_FACTOR (1000 * 1000 * 1000)
474
475 void VMError::record_reporting_start_time() {
476 const jlong now = get_current_timestamp();
477 Atomic::store(&_reporting_start_time, now);
478 }
479
480 jlong VMError::get_reporting_start_time() {
481 return Atomic::load(&_reporting_start_time);
482 }
483
484 void VMError::record_step_start_time() {
485 const jlong now = get_current_timestamp();
486 Atomic::store(&_step_start_time, now);
487 }
488
489 jlong VMError::get_step_start_time() {
490 return Atomic::load(&_step_start_time);
491 }
492
493 void VMError::clear_step_start_time() {
494 return Atomic::store(&_step_start_time, (jlong)0);
495 }
496
497 // This is the main function to report a fatal error. Only one thread can
498 // call this function, so we don't need to worry about MT-safety. But it's
499 // possible that the error handler itself may crash or die on an internal
500 // error, for example, when the stack/heap is badly damaged. We must be
501 // able to handle recursive errors that happen inside error handler.
502 //
503 // Error reporting is done in several steps. If a crash or internal error
504 // occurred when reporting an error, the nested signal/exception handler
505 // can skip steps that are already (or partially) done. Error reporting will
506 // continue from the next step. This allows us to retrieve and print
507 // information that may be unsafe to get after a fatal error. If it happens,
508 // you may find nested report_and_die() frames when you look at the stack
509 // in a debugger.
510 //
511 // In general, a hang in error handler is much worse than a crash or internal
512 // error, as it's harder to recover from a hang. Deadlock can happen if we
513 // try to grab a lock that is already owned by current thread, or if the
514 // owner is blocked forever (e.g. in os::infinite_sleep()). If possible, the
515 // error handler and all the functions it called should avoid grabbing any
516 // lock. An important thing to notice is that memory allocation needs a lock.
517 //
518 // We should avoid using large stack allocated buffers. Many errors happen
519 // when stack space is already low. Making things even worse is that there
520 // could be nested report_and_die() calls on stack (see above). Only one
521 // thread can report error, so large buffers are statically allocated in data
522 // segment.
523 void VMError::report(outputStream* st, bool _verbose) {
524
525 # define BEGIN if (_current_step == 0) { _current_step = __LINE__;
526 # define STEP(s) } if (_current_step < __LINE__) { _current_step = __LINE__; _current_step_info = s; \
527 record_step_start_time(); _step_did_timeout = false;
528 # define END clear_step_start_time(); }
529
530 // don't allocate large buffer on stack
531 static char buf[O_BUFLEN];
532
533 BEGIN
534
535 STEP("printing fatal error message")
536
537 st->print_cr("#");
538 if (should_report_bug(_id)) {
539 st->print_cr("# A fatal error has been detected by the Java Runtime Environment:");
540 } else {
541 st->print_cr("# There is insufficient memory for the Java "
542 "Runtime Environment to continue.");
543 }
544
545 #ifdef ASSERT
546 // Error handler self tests
547
548 // test secondary error handling. Test it twice, to test that resetting
549 // error handler after a secondary crash works.
550 STEP("test secondary crash 1")
551 if (_verbose && TestCrashInErrorHandler != 0) {
552 st->print_cr("Will crash now (TestCrashInErrorHandler=" UINTX_FORMAT ")...",
553 TestCrashInErrorHandler);
554 controlled_crash(TestCrashInErrorHandler);
555 }
556
557 STEP("test secondary crash 2")
558 if (_verbose && TestCrashInErrorHandler != 0) {
559 st->print_cr("Will crash now (TestCrashInErrorHandler=" UINTX_FORMAT ")...",
560 TestCrashInErrorHandler);
561 controlled_crash(TestCrashInErrorHandler);
562 }
563
564 // TestUnresponsiveErrorHandler: We want to test both step timeouts and global timeout.
565 // Step to global timeout ratio is 4:1, so in order to be absolutely sure we hit the
566 // global timeout, let's execute the timeout step five times.
567 // See corresponding test in test/runtime/ErrorHandling/TimeoutInErrorHandlingTest.java
568 STEP("setup for test unresponsive error reporting step")
569 if (_verbose && TestUnresponsiveErrorHandler) {
570 // We record reporting_start_time for this test here because we
571 // care about the time spent executing TIMEOUT_TEST_STEP and not
572 // about the time it took us to get here.
573 tty->print_cr("Recording reporting_start_time for TestUnresponsiveErrorHandler.");
574 record_reporting_start_time();
575 }
576
577 #define TIMEOUT_TEST_STEP STEP("test unresponsive error reporting step") \
578 if (_verbose && TestUnresponsiveErrorHandler) { os::infinite_sleep(); }
579 TIMEOUT_TEST_STEP
580 TIMEOUT_TEST_STEP
581 TIMEOUT_TEST_STEP
582 TIMEOUT_TEST_STEP
583 TIMEOUT_TEST_STEP
584
585 STEP("test safefetch in error handler")
586 // test whether it is safe to use SafeFetch32 in Crash Handler. Test twice
587 // to test that resetting the signal handler works correctly.
588 if (_verbose && TestSafeFetchInErrorHandler) {
589 st->print_cr("Will test SafeFetch...");
590 if (CanUseSafeFetch32()) {
591 int* const invalid_pointer = (int*)segfault_address;
592 const int x = 0x76543210;
593 int i1 = SafeFetch32(invalid_pointer, x);
594 int i2 = SafeFetch32(invalid_pointer, x);
595 if (i1 == x && i2 == x) {
596 st->print_cr("SafeFetch OK."); // Correctly deflected and returned default pattern
597 } else {
598 st->print_cr("??");
599 }
600 } else {
601 st->print_cr("not possible; skipped.");
602 }
603 }
604 #endif // ASSERT
605
606 STEP("printing type of error")
607
608 switch(static_cast<unsigned int>(_id)) {
609 case OOM_MALLOC_ERROR:
610 case OOM_MMAP_ERROR:
611 case OOM_MPROTECT_ERROR:
612 if (_size) {
613 st->print("# Native memory allocation ");
614 st->print((_id == (int)OOM_MALLOC_ERROR) ? "(malloc) failed to allocate " :
615 (_id == (int)OOM_MMAP_ERROR) ? "(mmap) failed to map " :
616 "(mprotect) failed to protect ");
617 jio_snprintf(buf, sizeof(buf), SIZE_FORMAT, _size);
618 st->print("%s", buf);
619 st->print(" bytes");
620 if (strlen(_detail_msg) > 0) {
621 st->print(" for ");
622 st->print("%s", _detail_msg);
623 }
624 st->cr();
625 } else {
626 if (strlen(_detail_msg) > 0) {
627 st->print("# ");
628 st->print_cr("%s", _detail_msg);
629 }
630 }
631 // In error file give some solutions
632 if (_verbose) {
633 print_oom_reasons(st);
634 } else {
635 return; // that's enough for the screen
636 }
637 break;
638 case INTERNAL_ERROR:
639 default:
640 break;
641 }
642
643 STEP("printing exception/signal name")
644
645 st->print_cr("#");
646 st->print("# ");
647 // Is it an OS exception/signal?
648 if (os::exception_name(_id, buf, sizeof(buf))) {
649 st->print("%s", buf);
650 st->print(" (0x%x)", _id); // signal number
651 st->print(" at pc=" PTR_FORMAT, p2i(_pc));
652 if (_siginfo != NULL && os::signal_sent_by_kill(_siginfo)) {
653 st->print(" (sent by kill)");
654 }
655 } else {
656 if (should_report_bug(_id)) {
657 st->print("Internal Error");
658 } else {
659 st->print("Out of Memory Error");
660 }
661 if (_filename != NULL && _lineno > 0) {
662 #ifdef PRODUCT
663 // In product mode chop off pathname?
664 char separator = os::file_separator()[0];
665 const char *p = strrchr(_filename, separator);
666 const char *file = p ? p+1 : _filename;
667 #else
668 const char *file = _filename;
669 #endif
670 st->print(" (%s:%d)", file, _lineno);
671 } else {
672 st->print(" (0x%x)", _id);
673 }
674 }
675
676 STEP("printing current thread and pid")
677
678 // process id, thread id
679 st->print(", pid=%d", os::current_process_id());
680 st->print(", tid=" UINTX_FORMAT, os::current_thread_id());
681 st->cr();
682
683 STEP("printing error message")
684
685 if (should_report_bug(_id)) { // already printed the message.
686 // error message
687 if (strlen(_detail_msg) > 0) {
688 st->print_cr("# %s: %s", _message ? _message : "Error", _detail_msg);
689 } else if (_message) {
690 st->print_cr("# Error: %s", _message);
691 }
692 }
693
694 STEP("printing Java version string")
695
696 report_vm_version(st, buf, sizeof(buf));
697
698 STEP("printing problematic frame")
699
700 // Print current frame if we have a context (i.e. it's a crash)
701 if (_context) {
702 st->print_cr("# Problematic frame:");
703 st->print("# ");
704 frame fr = os::fetch_frame_from_context(_context);
705 fr.print_on_error(st, buf, sizeof(buf));
706 st->cr();
707 st->print_cr("#");
708 }
709
710 STEP("printing core file information")
711 st->print("# ");
712 if (CreateCoredumpOnCrash) {
713 if (coredump_status) {
714 st->print("Core dump will be written. Default location: %s", coredump_message);
715 } else {
716 st->print("No core dump will be written. %s", coredump_message);
717 }
718 } else {
719 st->print("CreateCoredumpOnCrash turned off, no core file dumped");
720 }
721 st->cr();
722 st->print_cr("#");
723
724 JFR_ONLY(STEP("printing jfr information"))
725 JFR_ONLY(Jfr::on_vm_error_report(st);)
726
727 STEP("printing bug submit message")
728
729 if (should_submit_bug_report(_id) && _verbose) {
730 print_bug_submit_message(st, _thread);
731 }
732
733 STEP("printing summary")
734
735 if (_verbose) {
736 st->cr();
737 st->print_cr("--------------- S U M M A R Y ------------");
738 st->cr();
739 }
740
741 STEP("printing VM option summary")
742
743 if (_verbose) {
744 // VM options
745 Arguments::print_summary_on(st);
746 st->cr();
747 }
748
749 STEP("printing summary machine and OS info")
750
751 if (_verbose) {
752 os::print_summary_info(st, buf, sizeof(buf));
753 }
754
755 STEP("printing date and time")
756
757 if (_verbose) {
758 os::print_date_and_time(st, buf, sizeof(buf));
759 }
760
761 STEP("printing thread")
762
763 if (_verbose) {
764 st->cr();
765 st->print_cr("--------------- T H R E A D ---------------");
766 st->cr();
767 }
768
769 STEP("printing current thread")
770
771 // current thread
772 if (_verbose) {
773 if (_thread) {
774 st->print("Current thread (" PTR_FORMAT "): ", p2i(_thread));
775 _thread->print_on_error(st, buf, sizeof(buf));
776 st->cr();
777 } else {
778 st->print_cr("Current thread is native thread");
779 }
780 st->cr();
781 }
782
783 STEP("printing current compile task")
784
785 if (_verbose && _thread && _thread->is_Compiler_thread()) {
786 CompilerThread* t = (CompilerThread*)_thread;
787 if (t->task()) {
788 st->cr();
789 st->print_cr("Current CompileTask:");
790 t->task()->print_line_on_error(st, buf, sizeof(buf));
791 st->cr();
792 }
793 }
794
795 STEP("printing stack bounds")
796
797 if (_verbose) {
798 st->print("Stack: ");
799
800 address stack_top;
801 size_t stack_size;
802
803 if (_thread) {
804 stack_top = _thread->stack_base();
805 stack_size = _thread->stack_size();
806 } else {
807 stack_top = os::current_stack_base();
808 stack_size = os::current_stack_size();
809 }
810
811 address stack_bottom = stack_top - stack_size;
812 st->print("[" PTR_FORMAT "," PTR_FORMAT "]", p2i(stack_bottom), p2i(stack_top));
813
814 frame fr = _context ? os::fetch_frame_from_context(_context)
815 : os::current_frame();
816
817 if (fr.sp()) {
818 st->print(", sp=" PTR_FORMAT, p2i(fr.sp()));
819 size_t free_stack_size = pointer_delta(fr.sp(), stack_bottom, 1024);
820 st->print(", free space=" SIZE_FORMAT "k", free_stack_size);
821 }
822
823 st->cr();
824 }
825
826 STEP("printing native stack")
827
828 if (_verbose) {
829 if (os::platform_print_native_stack(st, _context, buf, sizeof(buf))) {
830 // We have printed the native stack in platform-specific code
831 // Windows/x64 needs special handling.
832 } else {
833 frame fr = _context ? os::fetch_frame_from_context(_context)
834 : os::current_frame();
835
836 print_native_stack(st, fr, _thread, buf, sizeof(buf));
837 _print_native_stack_used = true;
838 }
839 }
840
841 STEP("printing Java stack")
842
843 if (_verbose && _thread && _thread->is_Java_thread()) {
844 print_stack_trace(st, JavaThread::cast(_thread), buf, sizeof(buf));
845 }
846
847 STEP("printing target Java thread stack")
848
849 // printing Java thread stack trace if it is involved in GC crash
850 if (_verbose && _thread && (_thread->is_Named_thread())) {
851 Thread* thread = ((NamedThread *)_thread)->processed_thread();
852 if (thread != NULL && thread->is_Java_thread()) {
853 JavaThread* jt = JavaThread::cast(thread);
854 st->print_cr("JavaThread " PTR_FORMAT " (nid = %d) was being processed", p2i(jt), jt->osthread()->thread_id());
855 print_stack_trace(st, jt, buf, sizeof(buf), true);
856 }
857 }
858
859 STEP("printing siginfo")
860
861 // signal no, signal code, address that caused the fault
862 if (_verbose && _siginfo) {
863 st->cr();
864 os::print_siginfo(st, _siginfo);
865 st->cr();
866 }
867
868 STEP("CDS archive access warning")
869
870 // Print an explicit hint if we crashed on access to the CDS archive.
871 if (_verbose && _siginfo) {
872 check_failing_cds_access(st, _siginfo);
873 st->cr();
874 }
875
876 STEP("printing register info")
877
878 // decode register contents if possible
879 if (_verbose && _context && _thread && Universe::is_fully_initialized()) {
880 ResourceMark rm(_thread);
881 os::print_register_info(st, _context);
882 st->cr();
883 }
884
885 STEP("printing registers, top of stack, instructions near pc")
886
887 // registers, top of stack, instructions near pc
888 if (_verbose && _context) {
889 os::print_context(st, _context);
890 st->cr();
891 }
892
893 STEP("inspecting top of stack")
894
895 // decode stack contents if possible
896 if (_verbose && _context && _thread && Universe::is_fully_initialized()) {
897 frame fr = os::fetch_frame_from_context(_context);
898 const int slots = 8;
899 const intptr_t *start = fr.sp();
900 const intptr_t *end = start + slots;
901 if (is_aligned(start, sizeof(intptr_t)) && os::is_readable_range(start, end)) {
902 st->print_cr("Stack slot to memory mapping:");
903 for (int i = 0; i < slots; ++i) {
904 st->print("stack at sp + %d slots: ", i);
905 ResourceMark rm(_thread);
906 os::print_location(st, *(start + i));
907 }
908 }
909 st->cr();
910 }
911
912 STEP("printing code blobs if possible")
913
914 if (_verbose && _context) {
915 const int printed_capacity = max_error_log_print_code;
916 address printed[printed_capacity];
917 printed[0] = nullptr;
918 int printed_len = 0;
919 // Even though ErrorLogPrintCodeLimit is ranged checked
920 // during argument parsing, there's no way to prevent it
921 // subsequently (i.e., after parsing) being set to a
922 // value outside the range.
923 int limit = MIN2(ErrorLogPrintCodeLimit, printed_capacity);
924 if (limit > 0) {
925 // Scan the native stack
926 if (!_print_native_stack_used) {
927 // Only try to print code of the crashing frame since
928 // the native stack cannot be walked with next_frame.
929 if (print_code(st, _thread, _pc, true, printed, printed_capacity)) {
930 printed_len++;
931 }
932 } else {
933 frame fr = os::fetch_frame_from_context(_context);
934 while (printed_len < limit && fr.pc() != nullptr) {
935 if (print_code(st, _thread, fr.pc(), fr.pc() == _pc, printed, printed_capacity)) {
936 printed_len++;
937 }
938 fr = next_frame(fr, _thread);
939 }
940 }
941
942 // Scan the Java stack
943 if (_thread != nullptr && _thread->is_Java_thread()) {
944 JavaThread* jt = JavaThread::cast(_thread);
945 if (jt->has_last_Java_frame()) {
946 for (StackFrameStream sfs(jt, true /* update */, true /* process_frames */); printed_len < limit && !sfs.is_done(); sfs.next()) {
947 address pc = sfs.current()->pc();
948 if (print_code(st, _thread, pc, pc == _pc, printed, printed_capacity)) {
949 printed_len++;
950 }
951 }
952 }
953 }
954 }
955 }
956
957 STEP("printing VM operation")
958
959 if (_verbose && _thread && _thread->is_VM_thread()) {
960 VMThread* t = (VMThread*)_thread;
961 VM_Operation* op = t->vm_operation();
962 if (op) {
963 op->print_on_error(st);
964 st->cr();
965 st->cr();
966 }
967 }
968
969 STEP("printing process")
970
971 if (_verbose) {
972 st->cr();
973 st->print_cr("--------------- P R O C E S S ---------------");
974 st->cr();
975 }
976
977 #ifndef _WIN32
978 STEP("printing user info")
979
980 if (ExtensiveErrorReports && _verbose) {
981 os::Posix::print_user_info(st);
982 }
983 #endif
984
985 STEP("printing all threads")
986
987 // all threads
988 if (_verbose && _thread) {
989 Threads::print_on_error(st, _thread, buf, sizeof(buf));
990 st->cr();
991 }
992
993 STEP("printing VM state")
994
995 if (_verbose) {
996 // Safepoint state
997 st->print("VM state: ");
998
999 if (SafepointSynchronize::is_synchronizing()) st->print("synchronizing");
1000 else if (SafepointSynchronize::is_at_safepoint()) st->print("at safepoint");
1001 else st->print("not at safepoint");
1002
1003 // Also see if error occurred during initialization or shutdown
1004 if (!Universe::is_fully_initialized()) {
1005 st->print(" (not fully initialized)");
1006 } else if (VM_Exit::vm_exited()) {
1007 st->print(" (shutting down)");
1008 } else {
1009 st->print(" (normal execution)");
1010 }
1011 st->cr();
1012 st->cr();
1013 }
1014
1015 STEP("printing owned locks on error")
1016
1017 // mutexes/monitors that currently have an owner
1018 if (_verbose) {
1019 print_owned_locks_on_error(st);
1020 st->cr();
1021 }
1022
1023 STEP("printing number of OutOfMemoryError and StackOverflow exceptions")
1024
1025 if (_verbose && Exceptions::has_exception_counts()) {
1026 st->print_cr("OutOfMemory and StackOverflow Exception counts:");
1027 Exceptions::print_exception_counts_on_error(st);
1028 st->cr();
1029 }
1030
1031 #ifdef _LP64
1032 STEP("printing compressed oops mode")
1033
1034 if (_verbose && UseCompressedOops) {
1035 CompressedOops::print_mode(st);
1036 st->cr();
1037 }
1038
1039 STEP("printing compressed klass pointers mode")
1040
1041 if (_verbose && UseCompressedClassPointers) {
1042 CDS_ONLY(MetaspaceShared::print_on(st);)
1043 Metaspace::print_compressed_class_space(st);
1044 CompressedKlassPointers::print_mode(st);
1045 st->cr();
1046 }
1047 #endif
1048
1049 STEP("printing heap information")
1050
1051 if (_verbose) {
1052 GCLogPrecious::print_on_error(st);
1053
1054 if (Universe::heap() != NULL) {
1055 Universe::heap()->print_on_error(st);
1056 st->cr();
1057 }
1058
1059 if (Universe::is_fully_initialized()) {
1060 st->print_cr("Polling page: " INTPTR_FORMAT, p2i(SafepointMechanism::get_polling_page()));
1061 st->cr();
1062 }
1063 }
1064
1065 STEP("printing metaspace information")
1066
1067 if (_verbose && Universe::is_fully_initialized()) {
1068 st->print_cr("Metaspace:");
1069 MetaspaceUtils::print_basic_report(st, 0);
1070 }
1071
1072 STEP("printing code cache information")
1073
1074 if (_verbose && Universe::is_fully_initialized()) {
1075 // print code cache information before vm abort
1076 CodeCache::print_summary(st);
1077 st->cr();
1078 }
1079
1080 STEP("printing ring buffers")
1081
1082 if (_verbose) {
1083 Events::print_all(st);
1084 st->cr();
1085 }
1086
1087 STEP("printing dynamic libraries")
1088
1089 if (_verbose) {
1090 // dynamic libraries, or memory map
1091 os::print_dll_info(st);
1092 st->cr();
1093 }
1094
1095 STEP("printing native decoder state")
1096
1097 if (_verbose) {
1098 Decoder::print_state_on(st);
1099 st->cr();
1100 }
1101
1102 STEP("printing VM options")
1103
1104 if (_verbose) {
1105 // VM options
1106 Arguments::print_on(st);
1107 st->cr();
1108 }
1109
1110 STEP("printing flags")
1111
1112 if (_verbose) {
1113 JVMFlag::printFlags(
1114 st,
1115 true, // with comments
1116 false, // no ranges
1117 true); // skip defaults
1118 st->cr();
1119 }
1120
1121 STEP("printing warning if internal testing API used")
1122
1123 if (WhiteBox::used()) {
1124 st->print_cr("Unsupported internal testing APIs have been used.");
1125 st->cr();
1126 }
1127
1128 STEP("printing log configuration")
1129 if (_verbose){
1130 st->print_cr("Logging:");
1131 LogConfiguration::describe_current_configuration(st);
1132 st->cr();
1133 }
1134
1135 STEP("printing all environment variables")
1136
1137 if (_verbose) {
1138 os::print_environment_variables(st, env_list);
1139 st->cr();
1140 }
1141
1142 STEP("printing signal handlers")
1143
1144 if (_verbose) {
1145 os::print_signal_handlers(st, buf, sizeof(buf));
1146 st->cr();
1147 }
1148
1149 STEP("Native Memory Tracking")
1150 if (_verbose) {
1151 MemTracker::error_report(st);
1152 }
1153
1154 STEP("printing system")
1155
1156 if (_verbose) {
1157 st->cr();
1158 st->print_cr("--------------- S Y S T E M ---------------");
1159 st->cr();
1160 }
1161
1162 STEP("printing OS information")
1163
1164 if (_verbose) {
1165 os::print_os_info(st);
1166 st->cr();
1167 }
1168
1169 STEP("printing CPU info")
1170 if (_verbose) {
1171 os::print_cpu_info(st, buf, sizeof(buf));
1172 st->cr();
1173 }
1174
1175 STEP("printing memory info")
1176
1177 if (_verbose) {
1178 os::print_memory_info(st);
1179 st->cr();
1180 }
1181
1182 STEP("printing internal vm info")
1183
1184 if (_verbose) {
1185 st->print_cr("vm_info: %s", VM_Version::internal_vm_info_string());
1186 st->cr();
1187 }
1188
1189 // print a defined marker to show that error handling finished correctly.
1190 STEP("printing end marker")
1191
1192 if (_verbose) {
1193 st->print_cr("END.");
1194 }
1195
1196 END
1197
1198 # undef BEGIN
1199 # undef STEP
1200 # undef END
1201 }
1202
1203 // Report for the vm_info_cmd. This prints out the information above omitting
1204 // crash and thread specific information. If output is added above, it should be added
1205 // here also, if it is safe to call during a running process.
1206 void VMError::print_vm_info(outputStream* st) {
1207
1208 char buf[O_BUFLEN];
1209 report_vm_version(st, buf, sizeof(buf));
1210
1211 // STEP("printing summary")
1212
1213 st->cr();
1214 st->print_cr("--------------- S U M M A R Y ------------");
1215 st->cr();
1216
1217 // STEP("printing VM option summary")
1218
1219 // VM options
1220 Arguments::print_summary_on(st);
1221 st->cr();
1222
1223 // STEP("printing summary machine and OS info")
1224
1225 os::print_summary_info(st, buf, sizeof(buf));
1226
1227 // STEP("printing date and time")
1228
1229 os::print_date_and_time(st, buf, sizeof(buf));
1230
1231 // Skip: STEP("printing thread")
1232
1233 // STEP("printing process")
1234
1235 st->cr();
1236 st->print_cr("--------------- P R O C E S S ---------------");
1237 st->cr();
1238
1239 // STEP("printing number of OutOfMemoryError and StackOverflow exceptions")
1240
1241 if (Exceptions::has_exception_counts()) {
1242 st->print_cr("OutOfMemory and StackOverflow Exception counts:");
1243 Exceptions::print_exception_counts_on_error(st);
1244 st->cr();
1245 }
1246
1247 #ifdef _LP64
1248 // STEP("printing compressed oops mode")
1249 if (UseCompressedOops) {
1250 CompressedOops::print_mode(st);
1251 st->cr();
1252 }
1253
1254 // STEP("printing compressed class ptrs mode")
1255 if (UseCompressedClassPointers) {
1256 CDS_ONLY(MetaspaceShared::print_on(st);)
1257 Metaspace::print_compressed_class_space(st);
1258 CompressedKlassPointers::print_mode(st);
1259 st->cr();
1260 }
1261 #endif
1262
1263 // STEP("printing heap information")
1264
1265 if (Universe::is_fully_initialized()) {
1266 MutexLocker hl(Heap_lock);
1267 GCLogPrecious::print_on_error(st);
1268 Universe::heap()->print_on_error(st);
1269 st->cr();
1270 st->print_cr("Polling page: " INTPTR_FORMAT, p2i(SafepointMechanism::get_polling_page()));
1271 st->cr();
1272 }
1273
1274 // STEP("printing metaspace information")
1275
1276 if (Universe::is_fully_initialized()) {
1277 st->print_cr("Metaspace:");
1278 MetaspaceUtils::print_basic_report(st, 0);
1279 }
1280
1281 // STEP("printing code cache information")
1282
1283 if (Universe::is_fully_initialized()) {
1284 // print code cache information before vm abort
1285 CodeCache::print_summary(st);
1286 st->cr();
1287 }
1288
1289 // STEP("printing ring buffers")
1290
1291 Events::print_all(st);
1292 st->cr();
1293
1294 // STEP("printing dynamic libraries")
1295
1296 // dynamic libraries, or memory map
1297 os::print_dll_info(st);
1298 st->cr();
1299
1300 // STEP("printing VM options")
1301
1302 // VM options
1303 Arguments::print_on(st);
1304 st->cr();
1305
1306 // STEP("printing warning if internal testing API used")
1307
1308 if (WhiteBox::used()) {
1309 st->print_cr("Unsupported internal testing APIs have been used.");
1310 st->cr();
1311 }
1312
1313 // STEP("printing log configuration")
1314 st->print_cr("Logging:");
1315 LogConfiguration::describe(st);
1316 st->cr();
1317
1318 // STEP("printing all environment variables")
1319
1320 os::print_environment_variables(st, env_list);
1321 st->cr();
1322
1323 // STEP("printing signal handlers")
1324
1325 os::print_signal_handlers(st, buf, sizeof(buf));
1326 st->cr();
1327
1328 // STEP("Native Memory Tracking")
1329
1330 MemTracker::error_report(st);
1331
1332 // STEP("printing system")
1333
1334 st->cr();
1335 st->print_cr("--------------- S Y S T E M ---------------");
1336 st->cr();
1337
1338 // STEP("printing OS information")
1339
1340 os::print_os_info(st);
1341 st->cr();
1342
1343 // STEP("printing CPU info")
1344
1345 os::print_cpu_info(st, buf, sizeof(buf));
1346 st->cr();
1347
1348 // STEP("printing memory info")
1349
1350 os::print_memory_info(st);
1351 st->cr();
1352
1353 // STEP("printing internal vm info")
1354
1355 st->print_cr("vm_info: %s", VM_Version::internal_vm_info_string());
1356 st->cr();
1357
1358 // print a defined marker to show that error handling finished correctly.
1359 // STEP("printing end marker")
1360
1361 st->print_cr("END.");
1362 }
1363
1364 /** Expand a pattern into a buffer starting at pos and open a file using constructed path */
1365 static int expand_and_open(const char* pattern, bool overwrite_existing, char* buf, size_t buflen, size_t pos) {
1366 int fd = -1;
1367 int mode = O_RDWR | O_CREAT;
1368 if (overwrite_existing) {
1369 mode |= O_TRUNC;
1370 } else {
1371 mode |= O_EXCL;
1372 }
1373 if (Arguments::copy_expand_pid(pattern, strlen(pattern), &buf[pos], buflen - pos)) {
1374 fd = open(buf, mode, 0666);
1375 }
1376 return fd;
1377 }
1378
1379 /**
1380 * Construct file name for a log file and return it's file descriptor.
1381 * Name and location depends on pattern, default_pattern params and access
1382 * permissions.
1383 */
1384 int VMError::prepare_log_file(const char* pattern, const char* default_pattern, bool overwrite_existing, char* buf, size_t buflen) {
1385 int fd = -1;
1386
1387 // If possible, use specified pattern to construct log file name
1388 if (pattern != NULL) {
1389 fd = expand_and_open(pattern, overwrite_existing, buf, buflen, 0);
1390 }
1391
1392 // Either user didn't specify, or the user's location failed,
1393 // so use the default name in the current directory
1394 if (fd == -1) {
1395 const char* cwd = os::get_current_directory(buf, buflen);
1396 if (cwd != NULL) {
1397 size_t pos = strlen(cwd);
1398 int fsep_len = jio_snprintf(&buf[pos], buflen-pos, "%s", os::file_separator());
1399 pos += fsep_len;
1400 if (fsep_len > 0) {
1401 fd = expand_and_open(default_pattern, overwrite_existing, buf, buflen, pos);
1402 }
1403 }
1404 }
1405
1406 // try temp directory if it exists.
1407 if (fd == -1) {
1408 const char* tmpdir = os::get_temp_directory();
1409 if (tmpdir != NULL && strlen(tmpdir) > 0) {
1410 int pos = jio_snprintf(buf, buflen, "%s%s", tmpdir, os::file_separator());
1411 if (pos > 0) {
1412 fd = expand_and_open(default_pattern, overwrite_existing, buf, buflen, pos);
1413 }
1414 }
1415 }
1416
1417 return fd;
1418 }
1419
1420 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo,
1421 void* context, const char* detail_fmt, ...)
1422 {
1423 va_list detail_args;
1424 va_start(detail_args, detail_fmt);
1425 report_and_die(sig, NULL, detail_fmt, detail_args, thread, pc, siginfo, context, NULL, 0, 0);
1426 va_end(detail_args);
1427 }
1428
1429 void VMError::report_and_die(Thread* thread, unsigned int sig, address pc, void* siginfo, void* context)
1430 {
1431 report_and_die(thread, sig, pc, siginfo, context, "%s", "");
1432 }
1433
1434 void VMError::report_and_die(Thread* thread, void* context, const char* filename, int lineno, const char* message,
1435 const char* detail_fmt, va_list detail_args)
1436 {
1437 report_and_die(INTERNAL_ERROR, message, detail_fmt, detail_args, thread, NULL, NULL, context, filename, lineno, 0);
1438 }
1439
1440 void VMError::report_and_die(Thread* thread, const char* filename, int lineno, size_t size,
1441 VMErrorType vm_err_type, const char* detail_fmt, va_list detail_args) {
1442 report_and_die(vm_err_type, NULL, detail_fmt, detail_args, thread, NULL, NULL, NULL, filename, lineno, size);
1443 }
1444
1445 void VMError::report_and_die(int id, const char* message, const char* detail_fmt, va_list detail_args,
1446 Thread* thread, address pc, void* siginfo, void* context, const char* filename,
1447 int lineno, size_t size)
1448 {
1449 // A single scratch buffer to be used from here on.
1450 // Do not rely on it being preserved across function calls.
1451 static char buffer[O_BUFLEN];
1452
1453 // File descriptor to tty to print an error summary to.
1454 // Hard wired to stdout; see JDK-8215004 (compatibility concerns).
1455 static const int fd_out = 1; // stdout
1456
1457 // File descriptor to the error log file.
1458 static int fd_log = -1;
1459
1460 #ifdef CAN_SHOW_REGISTERS_ON_ASSERT
1461 // Disarm assertion poison page, since from this point on we do not need this mechanism anymore and it may
1462 // cause problems in error handling during native OOM, see JDK-8227275.
1463 disarm_assert_poison();
1464 #endif
1465
1466 // Use local fdStream objects only. Do not use global instances whose initialization
1467 // relies on dynamic initialization (see JDK-8214975). Do not rely on these instances
1468 // to carry over into recursions or invocations from other threads.
1469 fdStream out(fd_out);
1470 out.set_scratch_buffer(buffer, sizeof(buffer));
1471
1472 // Depending on the re-entrance depth at this point, fd_log may be -1 or point to an open hs-err file.
1473 fdStream log(fd_log);
1474 log.set_scratch_buffer(buffer, sizeof(buffer));
1475
1476 // How many errors occurred in error handler when reporting first_error.
1477 static int recursive_error_count;
1478
1479 // We will first print a brief message to standard out (verbose = false),
1480 // then save detailed information in log file (verbose = true).
1481 static bool out_done = false; // done printing to standard out
1482 static bool log_done = false; // done saving error log
1483
1484 intptr_t mytid = os::current_thread_id();
1485 if (_first_error_tid == -1 &&
1486 Atomic::cmpxchg(&_first_error_tid, (intptr_t)-1, mytid) == -1) {
1487
1488 if (SuppressFatalErrorMessage) {
1489 os::abort(CreateCoredumpOnCrash);
1490 }
1491
1492 // Initialize time stamps to use the same base.
1493 out.time_stamp().update_to(1);
1494 log.time_stamp().update_to(1);
1495
1496 _id = id;
1497 _message = message;
1498 _thread = thread;
1499 _pc = pc;
1500 _siginfo = siginfo;
1501 _context = context;
1502 _filename = filename;
1503 _lineno = lineno;
1504 _size = size;
1505 jio_vsnprintf(_detail_msg, sizeof(_detail_msg), detail_fmt, detail_args);
1506
1507 reporting_started();
1508 if (!TestUnresponsiveErrorHandler) {
1509 // Record reporting_start_time unless we're running the
1510 // TestUnresponsiveErrorHandler test. For that test we record
1511 // reporting_start_time at the beginning of the test.
1512 record_reporting_start_time();
1513 } else {
1514 out.print_raw_cr("Delaying recording reporting_start_time for TestUnresponsiveErrorHandler.");
1515 }
1516
1517 if (ShowMessageBoxOnError || PauseAtExit) {
1518 show_message_box(buffer, sizeof(buffer));
1519
1520 // User has asked JVM to abort. Reset ShowMessageBoxOnError so the
1521 // WatcherThread can kill JVM if the error handler hangs.
1522 ShowMessageBoxOnError = false;
1523 }
1524
1525 os::check_dump_limit(buffer, sizeof(buffer));
1526
1527 // reset signal handlers or exception filter; make sure recursive crashes
1528 // are handled properly.
1529 install_secondary_signal_handler();
1530 } else {
1531 #if defined(_WINDOWS)
1532 // If UseOSErrorReporting we call this for each level of the call stack
1533 // while searching for the exception handler. Only the first level needs
1534 // to be reported.
1535 if (UseOSErrorReporting && log_done) return;
1536 #endif
1537
1538 // This is not the first error, see if it happened in a different thread
1539 // or in the same thread during error reporting.
1540 if (_first_error_tid != mytid) {
1541 if (!SuppressFatalErrorMessage) {
1542 char msgbuf[64];
1543 jio_snprintf(msgbuf, sizeof(msgbuf),
1544 "[thread " INTX_FORMAT " also had an error]",
1545 mytid);
1546 out.print_raw_cr(msgbuf);
1547 }
1548
1549 // Error reporting is not MT-safe, nor can we let the current thread
1550 // proceed, so we block it.
1551 os::infinite_sleep();
1552
1553 } else {
1554 if (recursive_error_count++ > 30) {
1555 if (!SuppressFatalErrorMessage) {
1556 out.print_raw_cr("[Too many errors, abort]");
1557 }
1558 os::die();
1559 }
1560
1561 if (SuppressFatalErrorMessage) {
1562 // If we already hit a secondary error during abort, then calling
1563 // it again is likely to hit another one. But eventually, if we
1564 // don't deadlock somewhere, we will call os::die() above.
1565 os::abort(CreateCoredumpOnCrash);
1566 }
1567
1568 outputStream* const st = log.is_open() ? &log : &out;
1569 st->cr();
1570
1571 // Timeout handling.
1572 if (_step_did_timeout) {
1573 // The current step had a timeout. Lets continue reporting with the next step.
1574 st->print_raw("[timeout occurred during error reporting in step \"");
1575 st->print_raw(_current_step_info);
1576 st->print_cr("\"] after " INT64_FORMAT " s.",
1577 (int64_t)
1578 ((get_current_timestamp() - _step_start_time) / TIMESTAMP_TO_SECONDS_FACTOR));
1579 } else if (_reporting_did_timeout) {
1580 // We hit ErrorLogTimeout. Reporting will stop altogether. Let's wrap things
1581 // up, the process is about to be stopped by the WatcherThread.
1582 st->print_cr("------ Timeout during error reporting after " INT64_FORMAT " s. ------",
1583 (int64_t)
1584 ((get_current_timestamp() - _reporting_start_time) / TIMESTAMP_TO_SECONDS_FACTOR));
1585 st->flush();
1586 // Watcherthread is about to call os::die. Lets just wait.
1587 os::infinite_sleep();
1588 } else {
1589 // Crash or assert during error reporting. Lets continue reporting with the next step.
1590 stringStream ss(buffer, sizeof(buffer));
1591 // Note: this string does get parsed by a number of jtreg tests,
1592 // see hotspot/jtreg/runtime/ErrorHandling.
1593 ss.print("[error occurred during error reporting (%s), id 0x%x",
1594 _current_step_info, id);
1595 char signal_name[64];
1596 if (os::exception_name(id, signal_name, sizeof(signal_name))) {
1597 ss.print(", %s (0x%x) at pc=" PTR_FORMAT, signal_name, id, p2i(pc));
1598 } else {
1599 if (should_report_bug(id)) {
1600 ss.print(", Internal Error (%s:%d)",
1601 filename == NULL ? "??" : filename, lineno);
1602 } else {
1603 ss.print(", Out of Memory Error (%s:%d)",
1604 filename == NULL ? "??" : filename, lineno);
1605 }
1606 }
1607 ss.print("]");
1608 st->print_raw_cr(buffer);
1609 st->cr();
1610 }
1611 }
1612 }
1613
1614 // Part 1: print an abbreviated version (the '#' section) to stdout.
1615 if (!out_done) {
1616 // Suppress this output if we plan to print Part 2 to stdout too.
1617 // No need to have the "#" section twice.
1618 if (!(ErrorFileToStdout && out.fd() == 1)) {
1619 report(&out, false);
1620 }
1621
1622 out_done = true;
1623
1624 _current_step = 0;
1625 _current_step_info = "";
1626 }
1627
1628 // Part 2: print a full error log file (optionally to stdout or stderr).
1629 // print to error log file
1630 if (!log_done) {
1631 // see if log file is already open
1632 if (!log.is_open()) {
1633 // open log file
1634 if (ErrorFileToStdout) {
1635 fd_log = 1;
1636 } else if (ErrorFileToStderr) {
1637 fd_log = 2;
1638 } else {
1639 fd_log = prepare_log_file(ErrorFile, "hs_err_pid%p.log", true,
1640 buffer, sizeof(buffer));
1641 if (fd_log != -1) {
1642 out.print_raw("# An error report file with more information is saved as:\n# ");
1643 out.print_raw_cr(buffer);
1644 } else {
1645 out.print_raw_cr("# Can not save log file, dump to screen..");
1646 fd_log = 1;
1647 }
1648 }
1649 log.set_fd(fd_log);
1650 }
1651
1652 report(&log, true);
1653 log_done = true;
1654 _current_step = 0;
1655 _current_step_info = "";
1656
1657 if (fd_log > 3) {
1658 close(fd_log);
1659 fd_log = -1;
1660 }
1661
1662 log.set_fd(-1);
1663 }
1664
1665 JFR_ONLY(Jfr::on_vm_shutdown(true);)
1666
1667 if (PrintNMTStatistics) {
1668 fdStream fds(fd_out);
1669 MemTracker::final_report(&fds);
1670 }
1671
1672 static bool skip_replay = ReplayCompiles; // Do not overwrite file during replay
1673 if (DumpReplayDataOnError && _thread && _thread->is_Compiler_thread() && !skip_replay) {
1674 skip_replay = true;
1675 ciEnv* env = ciEnv::current();
1676 if (env != NULL) {
1677 const bool overwrite = false; // We do not overwrite an existing replay file.
1678 int fd = prepare_log_file(ReplayDataFile, "replay_pid%p.log", overwrite, buffer, sizeof(buffer));
1679 if (fd != -1) {
1680 FILE* replay_data_file = os::open(fd, "w");
1681 if (replay_data_file != NULL) {
1682 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1683 env->dump_replay_data_unsafe(&replay_data_stream);
1684 out.print_raw("#\n# Compiler replay data is saved as:\n# ");
1685 out.print_raw_cr(buffer);
1686 } else {
1687 int e = errno;
1688 out.print_raw("#\n# Can't open file to dump replay data. Error: ");
1689 out.print_raw_cr(os::strerror(e));
1690 }
1691 }
1692 }
1693 }
1694
1695 #if INCLUDE_JVMCI
1696 if (JVMCI::fatal_log_filename() != NULL) {
1697 out.print_raw("#\n# The JVMCI shared library error report file is saved as:\n# ");
1698 out.print_raw_cr(JVMCI::fatal_log_filename());
1699 }
1700 #endif
1701
1702 static bool skip_bug_url = !should_submit_bug_report(_id);
1703 if (!skip_bug_url) {
1704 skip_bug_url = true;
1705
1706 out.print_raw_cr("#");
1707 print_bug_submit_message(&out, _thread);
1708 }
1709
1710 static bool skip_OnError = false;
1711 if (!skip_OnError && OnError && OnError[0]) {
1712 skip_OnError = true;
1713
1714 // Flush output and finish logs before running OnError commands.
1715 ostream_abort();
1716
1717 out.print_raw_cr("#");
1718 out.print_raw ("# -XX:OnError=\"");
1719 out.print_raw (OnError);
1720 out.print_raw_cr("\"");
1721
1722 char* cmd;
1723 const char* ptr = OnError;
1724 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
1725 out.print_raw ("# Executing ");
1726 #if defined(LINUX) || defined(_ALLBSD_SOURCE)
1727 out.print_raw ("/bin/sh -c ");
1728 #elif defined(_WINDOWS)
1729 out.print_raw ("cmd /C ");
1730 #endif
1731 out.print_raw ("\"");
1732 out.print_raw (cmd);
1733 out.print_raw_cr("\" ...");
1734
1735 if (os::fork_and_exec(cmd) < 0) {
1736 out.print_cr("os::fork_and_exec failed: %s (%s=%d)",
1737 os::strerror(errno), os::errno_name(errno), errno);
1738 }
1739 }
1740
1741 // done with OnError
1742 OnError = NULL;
1743 }
1744
1745 if (WINDOWS_ONLY(!UseOSErrorReporting) NOT_WINDOWS(true)) {
1746 // os::abort() will call abort hooks, try it first.
1747 static bool skip_os_abort = false;
1748 if (!skip_os_abort) {
1749 skip_os_abort = true;
1750 bool dump_core = should_report_bug(_id);
1751 os::abort(dump_core && CreateCoredumpOnCrash, _siginfo, _context);
1752 }
1753
1754 // if os::abort() doesn't abort, try os::die();
1755 os::die();
1756 }
1757 }
1758
1759 /*
1760 * OnOutOfMemoryError scripts/commands executed while VM is a safepoint - this
1761 * ensures utilities such as jmap can observe the process is a consistent state.
1762 */
1763 class VM_ReportJavaOutOfMemory : public VM_Operation {
1764 private:
1765 const char* _message;
1766 public:
1767 VM_ReportJavaOutOfMemory(const char* message) { _message = message; }
1768 VMOp_Type type() const { return VMOp_ReportJavaOutOfMemory; }
1769 void doit();
1770 };
1771
1772 void VM_ReportJavaOutOfMemory::doit() {
1773 // Don't allocate large buffer on stack
1774 static char buffer[O_BUFLEN];
1775
1776 tty->print_cr("#");
1777 tty->print_cr("# java.lang.OutOfMemoryError: %s", _message);
1778 tty->print_cr("# -XX:OnOutOfMemoryError=\"%s\"", OnOutOfMemoryError);
1779
1780 // make heap parsability
1781 Universe::heap()->ensure_parsability(false); // no need to retire TLABs
1782
1783 char* cmd;
1784 const char* ptr = OnOutOfMemoryError;
1785 while ((cmd = next_OnError_command(buffer, sizeof(buffer), &ptr)) != NULL){
1786 tty->print("# Executing ");
1787 #if defined(LINUX)
1788 tty->print ("/bin/sh -c ");
1789 #endif
1790 tty->print_cr("\"%s\"...", cmd);
1791
1792 if (os::fork_and_exec(cmd) < 0) {
1793 tty->print_cr("os::fork_and_exec failed: %s (%s=%d)",
1794 os::strerror(errno), os::errno_name(errno), errno);
1795 }
1796 }
1797 }
1798
1799 void VMError::report_java_out_of_memory(const char* message) {
1800 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) {
1801 MutexLocker ml(Heap_lock);
1802 VM_ReportJavaOutOfMemory op(message);
1803 VMThread::execute(&op);
1804 }
1805 }
1806
1807 void VMError::show_message_box(char *buf, int buflen) {
1808 bool yes;
1809 do {
1810 error_string(buf, buflen);
1811 yes = os::start_debugging(buf,buflen);
1812 } while (yes);
1813 }
1814
1815 // Timeout handling: check if a timeout happened (either a single step did
1816 // timeout or the whole of error reporting hit ErrorLogTimeout). Interrupt
1817 // the reporting thread if that is the case.
1818 bool VMError::check_timeout() {
1819
1820 if (ErrorLogTimeout == 0) {
1821 return false;
1822 }
1823
1824 // Do not check for timeouts if we still have a message box to show to the
1825 // user or if there are OnError handlers to be run.
1826 if (ShowMessageBoxOnError
1827 || (OnError != NULL && OnError[0] != '\0')
1828 || Arguments::abort_hook() != NULL) {
1829 return false;
1830 }
1831
1832 const jlong reporting_start_time_l = get_reporting_start_time();
1833 const jlong now = get_current_timestamp();
1834 // Timestamp is stored in nanos.
1835 if (reporting_start_time_l > 0) {
1836 const jlong end = reporting_start_time_l + (jlong)ErrorLogTimeout * TIMESTAMP_TO_SECONDS_FACTOR;
1837 if (end <= now && !_reporting_did_timeout) {
1838 // We hit ErrorLogTimeout and we haven't interrupted the reporting
1839 // thread yet.
1840 _reporting_did_timeout = true;
1841 interrupt_reporting_thread();
1842 return true; // global timeout
1843 }
1844 }
1845
1846 const jlong step_start_time_l = get_step_start_time();
1847 if (step_start_time_l > 0) {
1848 // A step times out after a quarter of the total timeout. Steps are mostly fast unless they
1849 // hang for some reason, so this simple rule allows for three hanging step and still
1850 // hopefully leaves time enough for the rest of the steps to finish.
1851 const jlong end = step_start_time_l + (jlong)ErrorLogTimeout * TIMESTAMP_TO_SECONDS_FACTOR / 4;
1852 if (end <= now && !_step_did_timeout) {
1853 // The step timed out and we haven't interrupted the reporting
1854 // thread yet.
1855 _step_did_timeout = true;
1856 interrupt_reporting_thread();
1857 return false; // (Not a global timeout)
1858 }
1859 }
1860
1861 return false;
1862
1863 }
1864
1865 #ifdef ASSERT
1866 typedef void (*voidfun_t)();
1867
1868 // Crash with an authentic sigfpe
1869 volatile int sigfpe_int = 0;
1870 static void crash_with_sigfpe() {
1871
1872 // generate a native synchronous SIGFPE where possible;
1873 sigfpe_int = sigfpe_int/sigfpe_int;
1874
1875 // if that did not cause a signal (e.g. on ppc), just
1876 // raise the signal.
1877 #ifndef _WIN32
1878 // OSX implements raise(sig) incorrectly so we need to
1879 // explicitly target the current thread
1880 pthread_kill(pthread_self(), SIGFPE);
1881 #endif
1882
1883 } // end: crash_with_sigfpe
1884
1885 // crash with sigsegv at non-null address.
1886 static void crash_with_segfault() {
1887
1888 int* crash_addr = reinterpret_cast<int*>(VMError::segfault_address);
1889 *crash_addr = 1;
1890
1891 } // end: crash_with_segfault
1892
1893 // crash in a controlled way:
1894 // 1 - assert
1895 // 2 - guarantee
1896 // 14 - SIGSEGV
1897 // 15 - SIGFPE
1898 void VMError::controlled_crash(int how) {
1899
1900 // Case 14 is tested by test/hotspot/jtreg/runtime/ErrorHandling/SafeFetchInErrorHandlingTest.java.
1901 // Case 15 is tested by test/hotspot/jtreg/runtime/ErrorHandling/SecondaryErrorTest.java.
1902 // Case 16 is tested by test/hotspot/jtreg/runtime/ErrorHandling/ThreadsListHandleInErrorHandlingTest.java.
1903 // Case 17 is tested by test/hotspot/jtreg/runtime/ErrorHandling/NestedThreadsListHandleInErrorHandlingTest.java.
1904
1905 // We try to grab Threads_lock to keep ThreadsSMRSupport::print_info_on()
1906 // from racing with Threads::add() or Threads::remove() as we
1907 // generate the hs_err_pid file. This makes our ErrorHandling tests
1908 // more stable.
1909 if (!Threads_lock->owned_by_self()) {
1910 Threads_lock->try_lock();
1911 // The VM is going to die so no need to unlock Thread_lock.
1912 }
1913
1914 switch (how) {
1915 case 1: assert(how == 0, "test assert"); break;
1916 case 2: guarantee(how == 0, "test guarantee"); break;
1917
1918 // The other cases are unused.
1919 case 14: crash_with_segfault(); break;
1920 case 15: crash_with_sigfpe(); break;
1921 case 16: {
1922 ThreadsListHandle tlh;
1923 fatal("Force crash with an active ThreadsListHandle.");
1924 }
1925 case 17: {
1926 ThreadsListHandle tlh;
1927 {
1928 ThreadsListHandle tlh2;
1929 fatal("Force crash with a nested ThreadsListHandle.");
1930 }
1931 }
1932 default:
1933 // If another number is given, give a generic crash.
1934 fatal("Crashing with number %d", how);
1935 }
1936 tty->print_cr("controlled_crash: survived intentional crash. Did you suppress the assert?");
1937 ShouldNotReachHere();
1938 }
1939 #endif // !ASSERT