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