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/atomic.hpp"
42 #include "utilities/events.hpp"
43 #include "utilities/exceptions.hpp"
44 #include "utilities/utf8.hpp"
45
46 // Limit exception message components to 64K (the same max as Symbols)
47 #define MAX_LEN 65535
48
49 // Implementation of ThreadShadow
50 void check_ThreadShadow() {
51 const ByteSize offset1 = byte_offset_of(ThreadShadow, _pending_exception);
52 const ByteSize offset2 = Thread::pending_exception_offset();
53 if (offset1 != offset2) fatal("ThreadShadow::_pending_exception is not positioned correctly");
54 }
55
56
57 void ThreadShadow::set_pending_exception(oop exception, const char* file, int line) {
58 assert(exception != nullptr && oopDesc::is_oop(exception), "invalid exception oop");
59 _pending_exception = exception;
60 _exception_file = file;
61 _exception_line = line;
62 }
63
64 void ThreadShadow::clear_pending_exception() {
65 LogTarget(Debug, exceptions) lt;
66 if (_pending_exception != nullptr && lt.is_enabled()) {
67 ResourceMark rm;
68 LogStream ls(lt);
69 ls.print("Thread::clear_pending_exception: cleared exception:");
70 _pending_exception->print_on(&ls);
71 }
72 _pending_exception = nullptr;
73 _exception_file = nullptr;
74 _exception_line = 0;
75 }
76
77 void ThreadShadow::clear_pending_nonasync_exception() {
78 // Do not clear probable async exceptions.
79 if ((_pending_exception->klass() != vmClasses::InternalError_klass() ||
80 java_lang_InternalError::during_unsafe_access(_pending_exception) != JNI_TRUE)) {
81 clear_pending_exception();
82 }
83 }
84
85 void ThreadShadow::set_pending_preempted_exception() {
86 assert(!has_pending_exception(), "");
87 // We always install the same dummy exception since we only want
88 // to use the TRAPS mechaninsm to bail out from all methods until
89 // reaching the one using the CHECK_AND_CLEAR_PREEMPTED macro.
90 set_pending_exception(Universe::preempted_exception_instance(), __FILE__, __LINE__);
91 }
92
93 void ThreadShadow::clear_pending_preempted_exception() {
94 if (_pending_exception->klass() == vmClasses::PreemptedException_klass()) {
95 clear_pending_exception();
96 }
97 }
98
99 #ifdef ASSERT
100 void ThreadShadow::check_preempted_exception() {
101 assert(has_pending_exception(), "");
102 assert(pending_exception()->is_a(vmClasses::PreemptedException_klass()), "");
103 }
104 #endif
105
106 // Implementation of Exceptions
107
108 bool Exceptions::special_exception(JavaThread* thread, const char* file, int line, Handle h_exception, Symbol* h_name, const char* message) {
109 assert(h_exception.is_null() != (h_name == nullptr), "either exception (" PTR_FORMAT ") or "
110 "symbol (" PTR_FORMAT ") must be non-null but not both", p2i(h_exception()), p2i(h_name));
111
112 // bootstrapping check
113 if (!Universe::is_fully_initialized()) {
114 if (h_exception.not_null()) {
115 vm_exit_during_initialization(h_exception);
116 } else if (h_name == nullptr) {
117 // at least an informative message.
118 vm_exit_during_initialization("Exception", message);
119 } else {
120 vm_exit_during_initialization(h_name, message);
121 }
122 ShouldNotReachHere();
123 }
124
125 #ifdef ASSERT
126 // Check for trying to throw stack overflow before initialization is complete
127 // to prevent infinite recursion trying to initialize stack overflow without
128 // adequate stack space.
129 // This can happen with stress testing a large value of StackShadowPages
130 if (h_exception.not_null() && h_exception()->klass() == vmClasses::StackOverflowError_klass()) {
131 InstanceKlass* ik = InstanceKlass::cast(h_exception->klass());
132 assert(ik->is_initialized(),
133 "need to increase java_thread_min_stack_allowed calculation");
134 }
135 #endif // ASSERT
136
137 if (h_exception.is_null() && !thread->can_call_java()) {
138 ResourceMark rm(thread);
139 const char* exc_value = h_name != nullptr ? h_name->as_C_string() : "null";
140 log_info(exceptions)("Thread cannot call Java so instead of throwing exception <%.*s%s%.*s> (" PTR_FORMAT ") \n"
141 "at [%s, line %d]\nfor thread " PTR_FORMAT ",\n"
142 "throwing pre-allocated exception: %s",
143 MAX_LEN, exc_value, message ? ": " : "",
144 MAX_LEN, message ? message : "",
145 p2i(h_exception()), file, line, p2i(thread),
146 Universe::vm_exception()->print_value_string());
147 // We do not care what kind of exception we get for a thread which
148 // is compiling. We just install a dummy exception object
149 thread->set_pending_exception(Universe::vm_exception(), file, line);
150 return true;
151 }
152
153 return false;
154 }
155
156 // This method should only be called from generated code,
157 // therefore the exception oop should be in the oopmap.
158 void Exceptions::_throw_oop(JavaThread* thread, const char* file, int line, oop exception) {
159 assert(exception != nullptr, "exception should not be null");
160 Handle h_exception(thread, exception);
161 _throw(thread, file, line, h_exception);
162 }
163
164 void Exceptions::_throw(JavaThread* thread, const char* file, int line, Handle h_exception, const char* message) {
165 ResourceMark rm(thread);
166 assert(h_exception() != nullptr, "exception should not be null");
167
168 // tracing (do this up front - so it works during boot strapping)
169 // Note, the print_value_string() argument is not called unless logging is enabled!
170 log_info(exceptions)("Exception <%.*s%s%.*s> (" PTR_FORMAT ") \n"
171 "thrown [%s, line %d]\nfor thread " PTR_FORMAT,
172 MAX_LEN, h_exception->print_value_string(),
173 message ? ": " : "",
174 MAX_LEN, message ? message : "",
175 p2i(h_exception()), file, line, p2i(thread));
176
177 // for AbortVMOnException flag
178 Exceptions::debug_check_abort(h_exception, message);
179
180 // Check for special boot-strapping/compiler-thread handling
181 if (special_exception(thread, file, line, h_exception)) {
182 return;
183 }
184
185 if (h_exception->is_a(vmClasses::VirtualMachineError_klass())) {
186 // Remove the ScopedValue bindings in case we got a virtual machine
187 // Error while we were trying to manipulate ScopedValue bindings.
188 thread->clear_scopedValueBindings();
189
190 if (h_exception->is_a(vmClasses::OutOfMemoryError_klass())) {
191 count_out_of_memory_exceptions(h_exception);
192 }
193 }
194
195 if (h_exception->is_a(vmClasses::LinkageError_klass())) {
196 Atomic::inc(&_linkage_errors, memory_order_relaxed);
197 }
198
199 assert(h_exception->is_a(vmClasses::Throwable_klass()), "exception is not a subclass of java/lang/Throwable");
200
201 // set the pending exception
202 thread->set_pending_exception(h_exception(), file, line);
203
204 // vm log
205 Events::log_exception(thread, h_exception, message, file, line, MAX_LEN);
206 }
207
208
209 void Exceptions::_throw_msg(JavaThread* thread, const char* file, int line, Symbol* name, const char* message,
210 Handle h_loader) {
211 // Check for special boot-strapping/compiler-thread handling
212 if (special_exception(thread, file, line, Handle(), name, message)) return;
213 // Create and throw exception
214 Handle h_cause(thread, nullptr);
215 Handle h_exception = new_exception(thread, name, message, h_cause, h_loader);
216 _throw(thread, file, line, h_exception, message);
217 }
218
219 void Exceptions::_throw_msg_cause(JavaThread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause,
220 Handle h_loader) {
221 // Check for special boot-strapping/compiler-thread handling
222 if (special_exception(thread, file, line, Handle(), name, message)) return;
223 // Create and throw exception and init cause
224 Handle h_exception = new_exception(thread, name, message, h_cause, h_loader);
225 _throw(thread, file, line, h_exception, message);
226 }
227
228 void Exceptions::_throw_cause(JavaThread* thread, const char* file, int line, Symbol* name, Handle h_cause,
229 Handle h_loader) {
230 // Check for special boot-strapping/compiler-thread handling
231 if (special_exception(thread, file, line, Handle(), name)) return;
232 // Create and throw exception
233 Handle h_exception = new_exception(thread, name, h_cause, h_loader);
234 _throw(thread, file, line, h_exception, nullptr);
235 }
236
237 void Exceptions::_throw_args(JavaThread* thread, const char* file, int line, Symbol* name, Symbol* signature, JavaCallArguments *args) {
238 // Check for special boot-strapping/compiler-thread handling
239 if (special_exception(thread, file, line, Handle(), name, nullptr)) return;
240 // Create and throw exception
241 Handle h_loader(thread, nullptr);
242 Handle h_prot(thread, nullptr);
243 Handle exception = new_exception(thread, name, signature, args, h_loader, h_prot);
244 _throw(thread, file, line, exception);
245 }
246
247
248 // Methods for default parameters.
249 // NOTE: These must be here (and not in the header file) because of include circularities.
250 void Exceptions::_throw_msg_cause(JavaThread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause) {
251 _throw_msg_cause(thread, file, line, name, message, h_cause, Handle());
252 }
253 void Exceptions::_throw_msg(JavaThread* thread, const char* file, int line, Symbol* name, const char* message) {
254 _throw_msg(thread, file, line, name, message, Handle());
255 }
256 void Exceptions::_throw_cause(JavaThread* thread, const char* file, int line, Symbol* name, Handle h_cause) {
257 _throw_cause(thread, file, line, name, h_cause, Handle());
258 }
259
260
261 void Exceptions::throw_stack_overflow_exception(JavaThread* THREAD, const char* file, int line, const methodHandle& method) {
262 Handle exception;
263 if (!THREAD->has_pending_exception()) {
264 InstanceKlass* k = vmClasses::StackOverflowError_klass();
265 oop e = k->allocate_instance(CHECK);
266 exception = Handle(THREAD, e); // fill_in_stack trace does gc
267 assert(k->is_initialized(), "need to increase java_thread_min_stack_allowed calculation");
268 if (StackTraceInThrowable) {
269 java_lang_Throwable::fill_in_stack_trace(exception, method);
270 }
271 // Increment counter for hs_err file reporting
272 Atomic::inc(&Exceptions::_stack_overflow_errors, memory_order_relaxed);
273 } else {
274 // if prior exception, throw that one instead
275 exception = Handle(THREAD, THREAD->pending_exception());
276 }
277 _throw(THREAD, file, line, exception);
278 }
279
280 // All callers are expected to have ensured that the incoming expanded format string
281 // will be within reasonable limits - specifically we will never hit the INT_MAX limit
282 // of os::vsnprintf when it tries to report how big a buffer is needed. Even so we
283 // further limit the formatted output to 1024 characters.
284 void Exceptions::fthrow(JavaThread* thread, const char* file, int line, Symbol* h_name, const char* format, ...) {
285 const int max_msg_size = 1024;
286 va_list ap;
287 va_start(ap, format);
288 char msg[max_msg_size];
289 int ret = os::vsnprintf(msg, max_msg_size, format, ap);
290 va_end(ap);
291
292 // If ret == -1 then either there was a format conversion error, or the required buffer size
293 // exceeds INT_MAX and so couldn't be returned (undocumented behaviour of vsnprintf). Depending
294 // on the platform the buffer may be filled to its capacity (Linux), filled to the conversion
295 // that encountered the overflow (macOS), or is empty (Windows), so it is possible we
296 // have a truncated UTF-8 sequence. Similarly, if the buffer was too small and ret >= max_msg_size
297 // we may also have a truncated UTF-8 sequence. In such cases we need to fix the buffer so the UTF-8
298 // sequence is valid.
299 assert(ret != -1, "Caller should have ensured the incoming format string is size limited!");
300 if (ret == -1 || ret >= max_msg_size) {
301 int len = (int) strlen(msg);
302 if (len > 0) {
303 // Truncation will only happen if the buffer was filled by vsnprintf,
304 // otherwise vsnprintf already terminated filling it at a well-defined point.
305 // But as this is not a clearly specified area we will perform our own UTF8
306 // truncation anyway - though for those well-defined termination points it
307 // will be a no-op.
308 UTF8::truncate_to_legal_utf8((unsigned char*)msg, len + 1);
309 }
310 }
311 // UTF8::is_legal_utf8 should actually be called is_legal_utf8_class_name as the final
312 // parameter controls a check for a specific character appearing in the "name", which is only
313 // allowed for classfile versions <= 47. We pass `true` so that we allow such strings as this code
314 // know nothing about the actual string content.
315 assert(UTF8::is_legal_utf8((const unsigned char*)msg, strlen(msg), true), "must be");
316 _throw_msg(thread, file, line, h_name, msg);
317 }
318
319
320 // Creates an exception oop, calls the <init> method with the given signature.
321 // and returns a Handle
322 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
323 Symbol* signature, JavaCallArguments *args,
324 Handle h_loader) {
325 assert(Universe::is_fully_initialized(),
326 "cannot be called during initialization");
327 assert(!thread->has_pending_exception(), "already has exception");
328
329 Handle h_exception;
330
331 // Resolve exception klass, and check for pending exception below.
332 Klass* klass = SystemDictionary::resolve_or_fail(name, h_loader, true, thread);
333
334 if (!thread->has_pending_exception()) {
335 assert(klass != nullptr, "klass must exist");
336 h_exception = JavaCalls::construct_new_instance(InstanceKlass::cast(klass),
337 signature,
338 args,
339 thread);
340 }
341
342 // Check if another exception was thrown in the process, if so rethrow that one
343 if (thread->has_pending_exception()) {
344 h_exception = Handle(thread, thread->pending_exception());
345 thread->clear_pending_exception();
346 }
347 return h_exception;
348 }
349
350 // Creates an exception oop, calls the <init> method with the given signature.
351 // and returns a Handle
352 // Initializes the cause if cause non-null
353 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
354 Symbol* signature, JavaCallArguments *args,
355 Handle h_cause,
356 Handle h_loader) {
357 Handle h_exception = new_exception(thread, name, signature, args, h_loader);
358
359 // Future: object initializer should take a cause argument
360 if (h_cause.not_null()) {
361 assert(h_cause->is_a(vmClasses::Throwable_klass()),
362 "exception cause is not a subclass of java/lang/Throwable");
363 JavaValue result1(T_OBJECT);
364 JavaCallArguments args1;
365 args1.set_receiver(h_exception);
366 args1.push_oop(h_cause);
367 JavaCalls::call_virtual(&result1, h_exception->klass(),
368 vmSymbols::initCause_name(),
369 vmSymbols::throwable_throwable_signature(),
370 &args1,
371 thread);
372 }
373
374 // Check if another exception was thrown in the process, if so rethrow that one
375 if (thread->has_pending_exception()) {
376 h_exception = Handle(thread, thread->pending_exception());
377 thread->clear_pending_exception();
378 }
379 return h_exception;
380 }
381
382 // Convenience method. Calls either the <init>() or <init>(Throwable) method when
383 // creating a new exception
384 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
385 Handle h_cause,
386 Handle h_loader,
387 ExceptionMsgToUtf8Mode to_utf8_safe) {
388 JavaCallArguments args;
389 Symbol* signature = nullptr;
390 if (h_cause.is_null()) {
391 signature = vmSymbols::void_method_signature();
392 } else {
393 signature = vmSymbols::throwable_void_signature();
394 args.push_oop(h_cause);
395 }
396 return new_exception(thread, name, signature, &args, h_loader);
397 }
398
399 // Convenience method. Calls either the <init>() or <init>(String) method when
400 // creating a new exception
401 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
402 const char* message, Handle h_cause,
403 Handle h_loader,
404 ExceptionMsgToUtf8Mode to_utf8_safe) {
405 JavaCallArguments args;
406 Symbol* signature = nullptr;
407 if (message == nullptr) {
408 signature = vmSymbols::void_method_signature();
409 } else {
410 // There should be no pending exception. The caller is responsible for not calling
411 // this with a pending exception.
412 Handle incoming_exception;
413 if (thread->has_pending_exception()) {
414 incoming_exception = Handle(thread, thread->pending_exception());
415 thread->clear_pending_exception();
416 ResourceMark rm(thread);
417 assert(incoming_exception.is_null(), "Pending exception while throwing %s %s", name->as_C_string(), message);
418 }
419 Handle msg;
420 if (to_utf8_safe == safe_to_utf8) {
421 // Make a java UTF8 string.
422 msg = java_lang_String::create_from_str(message, thread);
423 } else {
424 // Make a java string keeping the encoding scheme of the original string.
425 msg = java_lang_String::create_from_platform_dependent_str(message, thread);
426 }
427 // If we get an exception from the allocation, prefer that to
428 // the exception we are trying to build, or the pending exception (in product mode)
429 if (thread->has_pending_exception()) {
430 Handle exception(thread, thread->pending_exception());
431 thread->clear_pending_exception();
432 return exception;
433 }
434 if (incoming_exception.not_null()) {
435 return incoming_exception;
436 }
437 args.push_oop(msg);
438 signature = vmSymbols::string_void_signature();
439 }
440 return new_exception(thread, name, signature, &args, h_cause, h_loader);
441 }
442
443 // Another convenience method that creates handles for null class loaders and null causes.
444 // If the last parameter 'to_utf8_mode' is safe_to_utf8,
445 // it means we can safely ignore the encoding scheme of the message string and
446 // convert it directly to a java UTF8 string. Otherwise, we need to take the
447 // encoding scheme of the string into account. One thing we should do at some
448 // point is to push this flag down to class java_lang_String since other
449 // classes may need similar functionalities.
450 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
451 const char* message,
452 ExceptionMsgToUtf8Mode to_utf8_safe) {
453
454 Handle h_loader;
455 Handle h_cause;
456 return Exceptions::new_exception(thread, name, message, h_cause, h_loader,
457 to_utf8_safe);
458 }
459
460 // invokedynamic uses wrap_dynamic_exception for:
461 // - bootstrap method resolution
462 // - post call to MethodHandleNatives::linkCallSite
463 // dynamically computed constant uses wrap_dynamic_exception for:
464 // - bootstrap method resolution
465 // - post call to MethodHandleNatives::linkDynamicConstant
466 void Exceptions::wrap_dynamic_exception(bool is_indy, JavaThread* THREAD) {
467 if (THREAD->has_pending_exception()) {
468 bool log_indy = log_is_enabled(Debug, methodhandles, indy) && is_indy;
469 bool log_condy = log_is_enabled(Debug, methodhandles, condy) && !is_indy;
470 LogStreamHandle(Debug, methodhandles, indy) lsh_indy;
471 LogStreamHandle(Debug, methodhandles, condy) lsh_condy;
472 LogStream* ls = nullptr;
473 if (log_indy) {
474 ls = &lsh_indy;
475 } else if (log_condy) {
476 ls = &lsh_condy;
477 }
478 oop exception = THREAD->pending_exception();
479
480 // See the "Linking Exceptions" section for the invokedynamic instruction
481 // in JVMS 6.5.
482 if (exception->is_a(vmClasses::Error_klass())) {
483 // Pass through an Error, including BootstrapMethodError, any other form
484 // of linkage error, or say OutOfMemoryError
485 if (ls != nullptr) {
486 ResourceMark rm(THREAD);
487 ls->print_cr("bootstrap method invocation wraps BSME around " PTR_FORMAT, p2i(exception));
488 exception->print_on(ls);
489 }
490 return;
491 }
492
493 // Otherwise wrap the exception in a BootstrapMethodError
494 if (ls != nullptr) {
495 ResourceMark rm(THREAD);
496 ls->print_cr("%s throws BSME for " PTR_FORMAT, is_indy ? "invokedynamic" : "dynamic constant", p2i(exception));
497 exception->print_on(ls);
498 }
499 Handle nested_exception(THREAD, exception);
500 THREAD->clear_pending_exception();
501 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
502 }
503 }
504
505 // Exception counting for hs_err file
506 volatile int Exceptions::_stack_overflow_errors = 0;
507 volatile int Exceptions::_linkage_errors = 0;
508 volatile int Exceptions::_out_of_memory_error_java_heap_errors = 0;
509 volatile int Exceptions::_out_of_memory_error_metaspace_errors = 0;
510 volatile int Exceptions::_out_of_memory_error_class_metaspace_errors = 0;
511
512 void Exceptions::count_out_of_memory_exceptions(Handle exception) {
513 if (Universe::is_out_of_memory_error_metaspace(exception())) {
514 Atomic::inc(&_out_of_memory_error_metaspace_errors, memory_order_relaxed);
515 } else if (Universe::is_out_of_memory_error_class_metaspace(exception())) {
516 Atomic::inc(&_out_of_memory_error_class_metaspace_errors, memory_order_relaxed);
517 } else {
518 // everything else reported as java heap OOM
519 Atomic::inc(&_out_of_memory_error_java_heap_errors, memory_order_relaxed);
520 }
521 }
522
523 static void print_oom_count(outputStream* st, const char *err, int count) {
524 if (count > 0) {
525 st->print_cr("OutOfMemoryError %s=%d", err, count);
526 }
527 }
528
529 bool Exceptions::has_exception_counts() {
530 return (_stack_overflow_errors + _out_of_memory_error_java_heap_errors +
531 _out_of_memory_error_metaspace_errors + _out_of_memory_error_class_metaspace_errors) > 0;
532 }
533
534 void Exceptions::print_exception_counts_on_error(outputStream* st) {
535 print_oom_count(st, "java_heap_errors", _out_of_memory_error_java_heap_errors);
536 print_oom_count(st, "metaspace_errors", _out_of_memory_error_metaspace_errors);
537 print_oom_count(st, "class_metaspace_errors", _out_of_memory_error_class_metaspace_errors);
538 if (_stack_overflow_errors > 0) {
539 st->print_cr("StackOverflowErrors=%d", _stack_overflow_errors);
540 }
541 if (_linkage_errors > 0) {
542 st->print_cr("LinkageErrors=%d", _linkage_errors);
543 }
544 }
545
546 // Implementation of ExceptionMark
547
548 ExceptionMark::ExceptionMark(JavaThread* thread) {
549 assert(thread == JavaThread::current(), "must be");
550 _thread = thread;
551 check_no_pending_exception();
552 }
553
554 ExceptionMark::ExceptionMark() {
555 _thread = JavaThread::current();
556 check_no_pending_exception();
557 }
558
559 inline void ExceptionMark::check_no_pending_exception() {
560 if (_thread->has_pending_exception()) {
561 oop exception = _thread->pending_exception();
562 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
563 ResourceMark rm;
564 exception->print();
565 fatal("ExceptionMark constructor expects no pending exceptions");
566 }
567 }
568
569
570 ExceptionMark::~ExceptionMark() {
571 if (_thread->has_pending_exception()) {
572 Handle exception(_thread, _thread->pending_exception());
573 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
574 if (is_init_completed()) {
575 ResourceMark rm;
576 exception->print();
577 fatal("ExceptionMark destructor expects no pending exceptions");
578 } else {
579 vm_exit_during_initialization(exception);
580 }
581 }
582 }
583
584 // ----------------------------------------------------------------------------------------
585
586 // caller frees value_string if necessary
587 void Exceptions::debug_check_abort(const char *value_string, const char* message) {
588 if (AbortVMOnException != nullptr && value_string != nullptr &&
589 strstr(value_string, AbortVMOnException)) {
590 if (AbortVMOnExceptionMessage == nullptr || (message != nullptr &&
591 strstr(message, AbortVMOnExceptionMessage))) {
592 if (message == nullptr) {
593 fatal("Saw %s, aborting", value_string);
594 } else {
595 fatal("Saw %s: %s, aborting", value_string, message);
596 }
597 }
598 }
599 }
600
601 void Exceptions::debug_check_abort(Handle exception, const char* message) {
602 if (AbortVMOnException != nullptr) {
603 debug_check_abort_helper(exception, message);
604 }
605 }
606
607 void Exceptions::debug_check_abort_helper(Handle exception, const char* message) {
608 ResourceMark rm;
609 if (message == nullptr && exception->is_a(vmClasses::Throwable_klass())) {
610 oop msg = java_lang_Throwable::message(exception());
611 if (msg != nullptr) {
612 message = java_lang_String::as_utf8_string(msg);
613 }
614 }
615 debug_check_abort(exception()->klass()->external_name(), message);
616 }
617
618 // for logging exceptions
619 void Exceptions::log_exception(Handle exception, const char* message) {
620 ResourceMark rm;
621 const char* detail_message = java_lang_Throwable::message_as_utf8(exception());
622 if (detail_message != nullptr) {
623 log_info(exceptions)("Exception <%.*s: %.*s>\n thrown in %.*s",
624 MAX_LEN, exception->print_value_string(),
625 MAX_LEN, detail_message,
626 MAX_LEN, message);
627 } else {
628 log_info(exceptions)("Exception <%.*s>\n thrown in %.*s",
629 MAX_LEN, exception->print_value_string(),
630 MAX_LEN, message);
631 }
632 }