1 /*
2 * Copyright (c) 1998, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "classfile/javaClasses.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmClasses.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "logging/log.hpp"
31 #include "logging/logStream.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "memory/universe.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "runtime/handles.inline.hpp"
36 #include "runtime/init.hpp"
37 #include "runtime/java.hpp"
38 #include "runtime/javaCalls.hpp"
39 #include "runtime/javaThread.hpp"
40 #include "runtime/os.hpp"
41 #include "runtime/threadCritical.hpp"
42 #include "runtime/atomic.hpp"
43 #include "utilities/events.hpp"
44 #include "utilities/exceptions.hpp"
45 #include "utilities/utf8.hpp"
46
47 // Limit exception message components to 64K (the same max as Symbols)
48 #define MAX_LEN 65535
49
50 // Implementation of ThreadShadow
51 void check_ThreadShadow() {
52 const ByteSize offset1 = byte_offset_of(ThreadShadow, _pending_exception);
53 const ByteSize offset2 = Thread::pending_exception_offset();
54 if (offset1 != offset2) fatal("ThreadShadow::_pending_exception is not positioned correctly");
55 }
56
57
58 void ThreadShadow::set_pending_exception(oop exception, const char* file, int line) {
59 assert(exception != nullptr && oopDesc::is_oop(exception), "invalid exception oop");
60 _pending_exception = exception;
61 _exception_file = file;
62 _exception_line = line;
63 }
64
65 void ThreadShadow::clear_pending_exception() {
66 LogTarget(Debug, exceptions) lt;
67 if (_pending_exception != nullptr && lt.is_enabled()) {
68 ResourceMark rm;
69 LogStream ls(lt);
70 ls.print("Thread::clear_pending_exception: cleared exception:");
71 _pending_exception->print_on(&ls);
72 }
73 _pending_exception = nullptr;
74 _exception_file = nullptr;
75 _exception_line = 0;
76 }
77
78 void ThreadShadow::clear_pending_nonasync_exception() {
79 // Do not clear probable async exceptions.
80 if ((_pending_exception->klass() != vmClasses::InternalError_klass() ||
81 java_lang_InternalError::during_unsafe_access(_pending_exception) != JNI_TRUE)) {
82 clear_pending_exception();
83 }
84 }
85
86 // Implementation of Exceptions
87
88 bool Exceptions::special_exception(JavaThread* thread, const char* file, int line, Handle h_exception, Symbol* h_name, const char* message) {
89 assert(h_exception.is_null() != (h_name == nullptr), "either exception (" PTR_FORMAT ") or "
90 "symbol (" PTR_FORMAT ") must be non-null but not both", p2i(h_exception()), p2i(h_name));
91
92 // bootstrapping check
93 if (!Universe::is_fully_initialized()) {
94 if (h_exception.not_null()) {
95 vm_exit_during_initialization(h_exception);
96 } else if (h_name == nullptr) {
97 // at least an informative message.
98 vm_exit_during_initialization("Exception", message);
99 } else {
100 vm_exit_during_initialization(h_name, message);
101 }
102 ShouldNotReachHere();
103 }
104
105 #ifdef ASSERT
106 // Check for trying to throw stack overflow before initialization is complete
107 // to prevent infinite recursion trying to initialize stack overflow without
108 // adequate stack space.
109 // This can happen with stress testing a large value of StackShadowPages
110 if (h_exception.not_null() && h_exception()->klass() == vmClasses::StackOverflowError_klass()) {
111 InstanceKlass* ik = InstanceKlass::cast(h_exception->klass());
112 assert(ik->is_initialized(),
113 "need to increase java_thread_min_stack_allowed calculation");
114 }
115 #endif // ASSERT
116
117 if (h_exception.is_null() && !thread->can_call_java()) {
118 ResourceMark rm(thread);
119 const char* exc_value = h_name != nullptr ? h_name->as_C_string() : "null";
120 log_info(exceptions)("Thread cannot call Java so instead of throwing exception <%.*s%s%.*s> (" PTR_FORMAT ") \n"
121 "at [%s, line %d]\nfor thread " PTR_FORMAT ",\n"
122 "throwing pre-allocated exception: %s",
123 MAX_LEN, exc_value, message ? ": " : "",
124 MAX_LEN, message ? message : "",
125 p2i(h_exception()), file, line, p2i(thread),
126 Universe::vm_exception()->print_value_string());
127 // We do not care what kind of exception we get for a thread which
128 // is compiling. We just install a dummy exception object
129 thread->set_pending_exception(Universe::vm_exception(), file, line);
130 return true;
131 }
132
133 return false;
134 }
135
136 // This method should only be called from generated code,
137 // therefore the exception oop should be in the oopmap.
138 void Exceptions::_throw_oop(JavaThread* thread, const char* file, int line, oop exception) {
139 assert(exception != nullptr, "exception should not be null");
140 Handle h_exception(thread, exception);
141 _throw(thread, file, line, h_exception);
142 }
143
144 void Exceptions::_throw(JavaThread* thread, const char* file, int line, Handle h_exception, const char* message) {
145 ResourceMark rm(thread);
146 assert(h_exception() != nullptr, "exception should not be null");
147
148 // tracing (do this up front - so it works during boot strapping)
149 // Note, the print_value_string() argument is not called unless logging is enabled!
150 log_info(exceptions)("Exception <%.*s%s%.*s> (" PTR_FORMAT ") \n"
151 "thrown [%s, line %d]\nfor thread " PTR_FORMAT,
152 MAX_LEN, h_exception->print_value_string(),
153 message ? ": " : "",
154 MAX_LEN, message ? message : "",
155 p2i(h_exception()), file, line, p2i(thread));
156
157 // for AbortVMOnException flag
158 Exceptions::debug_check_abort(h_exception, message);
159
160 // Check for special boot-strapping/compiler-thread handling
161 if (special_exception(thread, file, line, h_exception)) {
162 return;
163 }
164
165 if (h_exception->is_a(vmClasses::VirtualMachineError_klass())) {
166 // Remove the ScopedValue bindings in case we got a virtual machine
167 // Error while we were trying to manipulate ScopedValue bindings.
168 thread->clear_scopedValueBindings();
169
170 if (h_exception->is_a(vmClasses::OutOfMemoryError_klass())) {
171 count_out_of_memory_exceptions(h_exception);
172 }
173 }
174
175 if (h_exception->is_a(vmClasses::LinkageError_klass())) {
176 Atomic::inc(&_linkage_errors, memory_order_relaxed);
177 }
178
179 assert(h_exception->is_a(vmClasses::Throwable_klass()), "exception is not a subclass of java/lang/Throwable");
180
181 // set the pending exception
182 thread->set_pending_exception(h_exception(), file, line);
183
184 // vm log
185 Events::log_exception(thread, h_exception, message, file, line, MAX_LEN);
186 }
187
188
189 void Exceptions::_throw_msg(JavaThread* thread, const char* file, int line, Symbol* name, const char* message,
190 Handle h_loader) {
191 // Check for special boot-strapping/compiler-thread handling
192 if (special_exception(thread, file, line, Handle(), name, message)) return;
193 // Create and throw exception
194 Handle h_cause(thread, nullptr);
195 Handle h_exception = new_exception(thread, name, message, h_cause, h_loader);
196 _throw(thread, file, line, h_exception, message);
197 }
198
199 void Exceptions::_throw_msg_cause(JavaThread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause,
200 Handle h_loader) {
201 // Check for special boot-strapping/compiler-thread handling
202 if (special_exception(thread, file, line, Handle(), name, message)) return;
203 // Create and throw exception and init cause
204 Handle h_exception = new_exception(thread, name, message, h_cause, h_loader);
205 _throw(thread, file, line, h_exception, message);
206 }
207
208 void Exceptions::_throw_cause(JavaThread* thread, const char* file, int line, Symbol* name, Handle h_cause,
209 Handle h_loader) {
210 // Check for special boot-strapping/compiler-thread handling
211 if (special_exception(thread, file, line, Handle(), name)) return;
212 // Create and throw exception
213 Handle h_exception = new_exception(thread, name, h_cause, h_loader);
214 _throw(thread, file, line, h_exception, nullptr);
215 }
216
217 void Exceptions::_throw_args(JavaThread* thread, const char* file, int line, Symbol* name, Symbol* signature, JavaCallArguments *args) {
218 // Check for special boot-strapping/compiler-thread handling
219 if (special_exception(thread, file, line, Handle(), name, nullptr)) return;
220 // Create and throw exception
221 Handle h_loader(thread, nullptr);
222 Handle h_prot(thread, nullptr);
223 Handle exception = new_exception(thread, name, signature, args, h_loader, h_prot);
224 _throw(thread, file, line, exception);
225 }
226
227
228 // Methods for default parameters.
229 // NOTE: These must be here (and not in the header file) because of include circularities.
230 void Exceptions::_throw_msg_cause(JavaThread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause) {
231 _throw_msg_cause(thread, file, line, name, message, h_cause, Handle());
232 }
233 void Exceptions::_throw_msg(JavaThread* thread, const char* file, int line, Symbol* name, const char* message) {
234 _throw_msg(thread, file, line, name, message, Handle());
235 }
236 void Exceptions::_throw_cause(JavaThread* thread, const char* file, int line, Symbol* name, Handle h_cause) {
237 _throw_cause(thread, file, line, name, h_cause, Handle());
238 }
239
240
241 void Exceptions::throw_stack_overflow_exception(JavaThread* THREAD, const char* file, int line, const methodHandle& method) {
242 Handle exception;
243 if (!THREAD->has_pending_exception()) {
244 InstanceKlass* k = vmClasses::StackOverflowError_klass();
245 oop e = k->allocate_instance(CHECK);
246 exception = Handle(THREAD, e); // fill_in_stack trace does gc
247 assert(k->is_initialized(), "need to increase java_thread_min_stack_allowed calculation");
248 if (StackTraceInThrowable) {
249 java_lang_Throwable::fill_in_stack_trace(exception, method);
250 }
251 // Increment counter for hs_err file reporting
252 Atomic::inc(&Exceptions::_stack_overflow_errors, memory_order_relaxed);
253 } else {
254 // if prior exception, throw that one instead
255 exception = Handle(THREAD, THREAD->pending_exception());
256 }
257 _throw(THREAD, file, line, exception);
258 }
259
260 // All callers are expected to have ensured that the incoming expanded format string
261 // will be within reasonable limits - specifically we will never hit the INT_MAX limit
262 // of os::vsnprintf when it tries to report how big a buffer is needed. Even so we
263 // further limit the formatted output to 1024 characters.
264 void Exceptions::fthrow(JavaThread* thread, const char* file, int line, Symbol* h_name, const char* format, ...) {
265 const int max_msg_size = 1024;
266 va_list ap;
267 va_start(ap, format);
268 char msg[max_msg_size];
269 int ret = os::vsnprintf(msg, max_msg_size, format, ap);
270 va_end(ap);
271
272 // If ret == -1 then either there was a format conversion error, or the required buffer size
273 // exceeds INT_MAX and so couldn't be returned (undocumented behaviour of vsnprintf). Depending
274 // on the platform the buffer may be filled to its capacity (Linux), filled to the conversion
275 // that encountered the overflow (macOS), or is empty (Windows), so it is possible we
276 // have a truncated UTF-8 sequence. Similarly, if the buffer was too small and ret >= max_msg_size
277 // we may also have a truncated UTF-8 sequence. In such cases we need to fix the buffer so the UTF-8
278 // sequence is valid.
279 assert(ret != -1, "Caller should have ensured the incoming format string is size limited!");
280 if (ret == -1 || ret >= max_msg_size) {
281 int len = (int) strlen(msg);
282 if (len > 0) {
283 // Truncation will only happen if the buffer was filled by vsnprintf,
284 // otherwise vsnprintf already terminated filling it at a well-defined point.
285 // But as this is not a clearly specified area we will perform our own UTF8
286 // truncation anyway - though for those well-defined termination points it
287 // will be a no-op.
288 UTF8::truncate_to_legal_utf8((unsigned char*)msg, len + 1);
289 }
290 }
291 // UTF8::is_legal_utf8 should actually be called is_legal_utf8_class_name as the final
292 // parameter controls a check for a specific character appearing in the "name", which is only
293 // allowed for classfile versions <= 47. We pass `true` so that we allow such strings as this code
294 // know nothing about the actual string content.
295 assert(UTF8::is_legal_utf8((const unsigned char*)msg, strlen(msg), true), "must be");
296 _throw_msg(thread, file, line, h_name, msg);
297 }
298
299
300 // Creates an exception oop, calls the <init> method with the given signature.
301 // and returns a Handle
302 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
303 Symbol* signature, JavaCallArguments *args,
304 Handle h_loader) {
305 assert(Universe::is_fully_initialized(),
306 "cannot be called during initialization");
307 assert(!thread->has_pending_exception(), "already has exception");
308
309 Handle h_exception;
310
311 // Resolve exception klass, and check for pending exception below.
312 Klass* klass = SystemDictionary::resolve_or_fail(name, h_loader, true, thread);
313
314 if (!thread->has_pending_exception()) {
315 assert(klass != nullptr, "klass must exist");
316 h_exception = JavaCalls::construct_new_instance(InstanceKlass::cast(klass),
317 signature,
318 args,
319 thread);
320 }
321
322 // Check if another exception was thrown in the process, if so rethrow that one
323 if (thread->has_pending_exception()) {
324 h_exception = Handle(thread, thread->pending_exception());
325 thread->clear_pending_exception();
326 }
327 return h_exception;
328 }
329
330 // Creates an exception oop, calls the <init> method with the given signature.
331 // and returns a Handle
332 // Initializes the cause if cause non-null
333 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
334 Symbol* signature, JavaCallArguments *args,
335 Handle h_cause,
336 Handle h_loader) {
337 Handle h_exception = new_exception(thread, name, signature, args, h_loader);
338
339 // Future: object initializer should take a cause argument
340 if (h_cause.not_null()) {
341 assert(h_cause->is_a(vmClasses::Throwable_klass()),
342 "exception cause is not a subclass of java/lang/Throwable");
343 JavaValue result1(T_OBJECT);
344 JavaCallArguments args1;
345 args1.set_receiver(h_exception);
346 args1.push_oop(h_cause);
347 JavaCalls::call_virtual(&result1, h_exception->klass(),
348 vmSymbols::initCause_name(),
349 vmSymbols::throwable_throwable_signature(),
350 &args1,
351 thread);
352 }
353
354 // Check if another exception was thrown in the process, if so rethrow that one
355 if (thread->has_pending_exception()) {
356 h_exception = Handle(thread, thread->pending_exception());
357 thread->clear_pending_exception();
358 }
359 return h_exception;
360 }
361
362 // Convenience method. Calls either the <init>() or <init>(Throwable) method when
363 // creating a new exception
364 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
365 Handle h_cause,
366 Handle h_loader,
367 ExceptionMsgToUtf8Mode to_utf8_safe) {
368 JavaCallArguments args;
369 Symbol* signature = nullptr;
370 if (h_cause.is_null()) {
371 signature = vmSymbols::void_method_signature();
372 } else {
373 signature = vmSymbols::throwable_void_signature();
374 args.push_oop(h_cause);
375 }
376 return new_exception(thread, name, signature, &args, h_loader);
377 }
378
379 // Convenience method. Calls either the <init>() or <init>(String) method when
380 // creating a new exception
381 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
382 const char* message, Handle h_cause,
383 Handle h_loader,
384 ExceptionMsgToUtf8Mode to_utf8_safe) {
385 JavaCallArguments args;
386 Symbol* signature = nullptr;
387 if (message == nullptr) {
388 signature = vmSymbols::void_method_signature();
389 } else {
390 // There should be no pending exception. The caller is responsible for not calling
391 // this with a pending exception.
392 Handle incoming_exception;
393 if (thread->has_pending_exception()) {
394 incoming_exception = Handle(thread, thread->pending_exception());
395 thread->clear_pending_exception();
396 ResourceMark rm(thread);
397 assert(incoming_exception.is_null(), "Pending exception while throwing %s %s", name->as_C_string(), message);
398 }
399 Handle msg;
400 if (to_utf8_safe == safe_to_utf8) {
401 // Make a java UTF8 string.
402 msg = java_lang_String::create_from_str(message, thread);
403 } else {
404 // Make a java string keeping the encoding scheme of the original string.
405 msg = java_lang_String::create_from_platform_dependent_str(message, thread);
406 }
407 // If we get an exception from the allocation, prefer that to
408 // the exception we are trying to build, or the pending exception (in product mode)
409 if (thread->has_pending_exception()) {
410 Handle exception(thread, thread->pending_exception());
411 thread->clear_pending_exception();
412 return exception;
413 }
414 if (incoming_exception.not_null()) {
415 return incoming_exception;
416 }
417 args.push_oop(msg);
418 signature = vmSymbols::string_void_signature();
419 }
420 return new_exception(thread, name, signature, &args, h_cause, h_loader);
421 }
422
423 // Another convenience method that creates handles for null class loaders and null causes.
424 // If the last parameter 'to_utf8_mode' is safe_to_utf8,
425 // it means we can safely ignore the encoding scheme of the message string and
426 // convert it directly to a java UTF8 string. Otherwise, we need to take the
427 // encoding scheme of the string into account. One thing we should do at some
428 // point is to push this flag down to class java_lang_String since other
429 // classes may need similar functionalities.
430 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
431 const char* message,
432 ExceptionMsgToUtf8Mode to_utf8_safe) {
433
434 Handle h_loader;
435 Handle h_cause;
436 return Exceptions::new_exception(thread, name, message, h_cause, h_loader,
437 to_utf8_safe);
438 }
439
440 // invokedynamic uses wrap_dynamic_exception for:
441 // - bootstrap method resolution
442 // - post call to MethodHandleNatives::linkCallSite
443 // dynamically computed constant uses wrap_dynamic_exception for:
444 // - bootstrap method resolution
445 // - post call to MethodHandleNatives::linkDynamicConstant
446 void Exceptions::wrap_dynamic_exception(bool is_indy, JavaThread* THREAD) {
447 if (THREAD->has_pending_exception()) {
448 bool log_indy = log_is_enabled(Debug, methodhandles, indy) && is_indy;
449 bool log_condy = log_is_enabled(Debug, methodhandles, condy) && !is_indy;
450 LogStreamHandle(Debug, methodhandles, indy) lsh_indy;
451 LogStreamHandle(Debug, methodhandles, condy) lsh_condy;
452 LogStream* ls = nullptr;
453 if (log_indy) {
454 ls = &lsh_indy;
455 } else if (log_condy) {
456 ls = &lsh_condy;
457 }
458 oop exception = THREAD->pending_exception();
459
460 // See the "Linking Exceptions" section for the invokedynamic instruction
461 // in JVMS 6.5.
462 if (exception->is_a(vmClasses::Error_klass())) {
463 // Pass through an Error, including BootstrapMethodError, any other form
464 // of linkage error, or say OutOfMemoryError
465 if (ls != nullptr) {
466 ResourceMark rm(THREAD);
467 ls->print_cr("bootstrap method invocation wraps BSME around " PTR_FORMAT, p2i(exception));
468 exception->print_on(ls);
469 }
470 return;
471 }
472
473 // Otherwise wrap the exception in a BootstrapMethodError
474 if (ls != nullptr) {
475 ResourceMark rm(THREAD);
476 ls->print_cr("%s throws BSME for " PTR_FORMAT, is_indy ? "invokedynamic" : "dynamic constant", p2i(exception));
477 exception->print_on(ls);
478 }
479 Handle nested_exception(THREAD, exception);
480 THREAD->clear_pending_exception();
481 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
482 }
483 }
484
485 // Exception counting for hs_err file
486 volatile int Exceptions::_stack_overflow_errors = 0;
487 volatile int Exceptions::_linkage_errors = 0;
488 volatile int Exceptions::_out_of_memory_error_java_heap_errors = 0;
489 volatile int Exceptions::_out_of_memory_error_metaspace_errors = 0;
490 volatile int Exceptions::_out_of_memory_error_class_metaspace_errors = 0;
491
492 void Exceptions::count_out_of_memory_exceptions(Handle exception) {
493 if (Universe::is_out_of_memory_error_metaspace(exception())) {
494 Atomic::inc(&_out_of_memory_error_metaspace_errors, memory_order_relaxed);
495 } else if (Universe::is_out_of_memory_error_class_metaspace(exception())) {
496 Atomic::inc(&_out_of_memory_error_class_metaspace_errors, memory_order_relaxed);
497 } else {
498 // everything else reported as java heap OOM
499 Atomic::inc(&_out_of_memory_error_java_heap_errors, memory_order_relaxed);
500 }
501 }
502
503 static void print_oom_count(outputStream* st, const char *err, int count) {
504 if (count > 0) {
505 st->print_cr("OutOfMemoryError %s=%d", err, count);
506 }
507 }
508
509 bool Exceptions::has_exception_counts() {
510 return (_stack_overflow_errors + _out_of_memory_error_java_heap_errors +
511 _out_of_memory_error_metaspace_errors + _out_of_memory_error_class_metaspace_errors) > 0;
512 }
513
514 void Exceptions::print_exception_counts_on_error(outputStream* st) {
515 print_oom_count(st, "java_heap_errors", _out_of_memory_error_java_heap_errors);
516 print_oom_count(st, "metaspace_errors", _out_of_memory_error_metaspace_errors);
517 print_oom_count(st, "class_metaspace_errors", _out_of_memory_error_class_metaspace_errors);
518 if (_stack_overflow_errors > 0) {
519 st->print_cr("StackOverflowErrors=%d", _stack_overflow_errors);
520 }
521 if (_linkage_errors > 0) {
522 st->print_cr("LinkageErrors=%d", _linkage_errors);
523 }
524 }
525
526 // Implementation of ExceptionMark
527
528 ExceptionMark::ExceptionMark(JavaThread* thread) {
529 assert(thread == JavaThread::current(), "must be");
530 _thread = thread;
531 check_no_pending_exception();
532 }
533
534 ExceptionMark::ExceptionMark() {
535 _thread = JavaThread::current();
536 check_no_pending_exception();
537 }
538
539 inline void ExceptionMark::check_no_pending_exception() {
540 if (_thread->has_pending_exception()) {
541 oop exception = _thread->pending_exception();
542 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
543 exception->print();
544 fatal("ExceptionMark constructor expects no pending exceptions");
545 }
546 }
547
548
549 ExceptionMark::~ExceptionMark() {
550 if (_thread->has_pending_exception()) {
551 Handle exception(_thread, _thread->pending_exception());
552 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
553 if (is_init_completed()) {
554 exception->print();
555 fatal("ExceptionMark destructor expects no pending exceptions");
556 } else {
557 vm_exit_during_initialization(exception);
558 }
559 }
560 }
561
562 // ----------------------------------------------------------------------------------------
563
564 // caller frees value_string if necessary
565 void Exceptions::debug_check_abort(const char *value_string, const char* message) {
566 if (AbortVMOnException != nullptr && value_string != nullptr &&
567 strstr(value_string, AbortVMOnException)) {
568 if (AbortVMOnExceptionMessage == nullptr || (message != nullptr &&
569 strstr(message, AbortVMOnExceptionMessage))) {
570 if (message == nullptr) {
571 fatal("Saw %s, aborting", value_string);
572 } else {
573 fatal("Saw %s: %s, aborting", value_string, message);
574 }
575 }
576 }
577 }
578
579 void Exceptions::debug_check_abort(Handle exception, const char* message) {
580 if (AbortVMOnException != nullptr) {
581 debug_check_abort_helper(exception, message);
582 }
583 }
584
585 void Exceptions::debug_check_abort_helper(Handle exception, const char* message) {
586 ResourceMark rm;
587 if (message == nullptr && exception->is_a(vmClasses::Throwable_klass())) {
588 oop msg = java_lang_Throwable::message(exception());
589 if (msg != nullptr) {
590 message = java_lang_String::as_utf8_string(msg);
591 }
592 }
593 debug_check_abort(exception()->klass()->external_name(), message);
594 }
595
596 // for logging exceptions
597 void Exceptions::log_exception(Handle exception, const char* message) {
598 ResourceMark rm;
599 const char* detail_message = java_lang_Throwable::message_as_utf8(exception());
600 if (detail_message != nullptr) {
601 log_info(exceptions)("Exception <%.*s: %.*s>\n thrown in %.*s",
602 MAX_LEN, exception->print_value_string(),
603 MAX_LEN, detail_message,
604 MAX_LEN, message);
605 } else {
606 log_info(exceptions)("Exception <%.*s>\n thrown in %.*s",
607 MAX_LEN, exception->print_value_string(),
608 MAX_LEN, message);
609 }
610 }