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 // Implementation of Exceptions
86
87 bool Exceptions::special_exception(JavaThread* thread, const char* file, int line, Handle h_exception, Symbol* h_name, const char* message) {
88 assert(h_exception.is_null() != (h_name == nullptr), "either exception (" PTR_FORMAT ") or "
89 "symbol (" PTR_FORMAT ") must be non-null but not both", p2i(h_exception()), p2i(h_name));
90
91 // bootstrapping check
92 if (!Universe::is_fully_initialized()) {
93 if (h_exception.not_null()) {
94 vm_exit_during_initialization(h_exception);
95 } else if (h_name == nullptr) {
96 // at least an informative message.
97 vm_exit_during_initialization("Exception", message);
98 } else {
99 vm_exit_during_initialization(h_name, message);
100 }
101 ShouldNotReachHere();
102 }
103
104 #ifdef ASSERT
105 // Check for trying to throw stack overflow before initialization is complete
106 // to prevent infinite recursion trying to initialize stack overflow without
107 // adequate stack space.
108 // This can happen with stress testing a large value of StackShadowPages
109 if (h_exception.not_null() && h_exception()->klass() == vmClasses::StackOverflowError_klass()) {
110 InstanceKlass* ik = InstanceKlass::cast(h_exception->klass());
111 assert(ik->is_initialized(),
112 "need to increase java_thread_min_stack_allowed calculation");
113 }
114 #endif // ASSERT
115
116 if (h_exception.is_null() && !thread->can_call_java()) {
117 if (log_is_enabled(Info, exceptions)) {
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 }
128 // We do not care what kind of exception we get for a thread which
129 // is compiling. We just install a dummy exception object
130 thread->set_pending_exception(Universe::vm_exception(), file, line);
131 return true;
132 }
133
134 return false;
135 }
136
137 // This method should only be called from generated code,
138 // therefore the exception oop should be in the oopmap.
139 void Exceptions::_throw_oop(JavaThread* thread, const char* file, int line, oop exception) {
140 assert(exception != nullptr, "exception should not be null");
141 Handle h_exception(thread, exception);
142 _throw(thread, file, line, h_exception);
143 }
144
145 void Exceptions::_throw(JavaThread* thread, const char* file, int line, Handle h_exception, const char* message) {
146 ResourceMark rm(thread);
147 assert(h_exception() != nullptr, "exception should not be null");
148
149 // tracing (do this up front - so it works during boot strapping)
150 // Note, the print_value_string() argument is not called unless logging is enabled!
151 log_info(exceptions)("Exception <%.*s%s%.*s> (" PTR_FORMAT ") \n"
152 "thrown [%s, line %d]\nfor thread " PTR_FORMAT,
153 MAX_LEN, h_exception->print_value_string(),
154 message ? ": " : "",
155 MAX_LEN, message ? message : "",
156 p2i(h_exception()), file, line, p2i(thread));
157 if (log_is_enabled(Info, exceptions, stacktrace)) {
158 log_exception_stacktrace(h_exception);
159 }
160
161 // for AbortVMOnException flag
162 Exceptions::debug_check_abort(h_exception, message);
163
164 // Check for special boot-strapping/compiler-thread handling
165 if (special_exception(thread, file, line, h_exception)) {
166 return;
167 }
168
169 if (h_exception->is_a(vmClasses::VirtualMachineError_klass())) {
170 // Remove the ScopedValue bindings in case we got a virtual machine
171 // Error while we were trying to manipulate ScopedValue bindings.
172 thread->clear_scopedValueBindings();
173
174 if (h_exception->is_a(vmClasses::OutOfMemoryError_klass())) {
175 count_out_of_memory_exceptions(h_exception);
176 }
177 }
178
179 if (h_exception->is_a(vmClasses::LinkageError_klass())) {
180 Atomic::inc(&_linkage_errors, memory_order_relaxed);
181 }
182
183 assert(h_exception->is_a(vmClasses::Throwable_klass()), "exception is not a subclass of java/lang/Throwable");
184
185 // set the pending exception
186 thread->set_pending_exception(h_exception(), file, line);
187
188 // vm log
189 Events::log_exception(thread, h_exception, message, file, line, MAX_LEN);
190 }
191
192
193 void Exceptions::_throw_msg(JavaThread* thread, const char* file, int line, Symbol* name, const char* message,
194 Handle h_loader) {
195 // Check for special boot-strapping/compiler-thread handling
196 if (special_exception(thread, file, line, Handle(), name, message)) return;
197 // Create and throw exception
198 Handle h_cause(thread, nullptr);
199 Handle h_exception = new_exception(thread, name, message, h_cause, h_loader);
200 _throw(thread, file, line, h_exception, message);
201 }
202
203 void Exceptions::_throw_msg_cause(JavaThread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause,
204 Handle h_loader) {
205 // Check for special boot-strapping/compiler-thread handling
206 if (special_exception(thread, file, line, Handle(), name, message)) return;
207 // Create and throw exception and init cause
208 Handle h_exception = new_exception(thread, name, message, h_cause, h_loader);
209 _throw(thread, file, line, h_exception, message);
210 }
211
212 void Exceptions::_throw_cause(JavaThread* thread, const char* file, int line, Symbol* name, Handle h_cause,
213 Handle h_loader) {
214 // Check for special boot-strapping/compiler-thread handling
215 if (special_exception(thread, file, line, Handle(), name)) return;
216 // Create and throw exception
217 Handle h_exception = new_exception(thread, name, h_cause, h_loader);
218 _throw(thread, file, line, h_exception, nullptr);
219 }
220
221 void Exceptions::_throw_args(JavaThread* thread, const char* file, int line, Symbol* name, Symbol* signature, JavaCallArguments *args) {
222 // Check for special boot-strapping/compiler-thread handling
223 if (special_exception(thread, file, line, Handle(), name, nullptr)) return;
224 // Create and throw exception
225 Handle h_loader(thread, nullptr);
226 Handle h_prot(thread, nullptr);
227 Handle exception = new_exception(thread, name, signature, args, h_loader, h_prot);
228 _throw(thread, file, line, exception);
229 }
230
231
232 // Methods for default parameters.
233 // NOTE: These must be here (and not in the header file) because of include circularities.
234 void Exceptions::_throw_msg_cause(JavaThread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause) {
235 _throw_msg_cause(thread, file, line, name, message, h_cause, Handle());
236 }
237 void Exceptions::_throw_msg(JavaThread* thread, const char* file, int line, Symbol* name, const char* message) {
238 _throw_msg(thread, file, line, name, message, Handle());
239 }
240 void Exceptions::_throw_cause(JavaThread* thread, const char* file, int line, Symbol* name, Handle h_cause) {
241 _throw_cause(thread, file, line, name, h_cause, Handle());
242 }
243
244
245 void Exceptions::throw_stack_overflow_exception(JavaThread* THREAD, const char* file, int line, const methodHandle& method) {
246 Handle exception;
247 if (!THREAD->has_pending_exception()) {
248 InstanceKlass* k = vmClasses::StackOverflowError_klass();
249 oop e = k->allocate_instance(CHECK);
250 exception = Handle(THREAD, e); // fill_in_stack trace does gc
251 assert(k->is_initialized(), "need to increase java_thread_min_stack_allowed calculation");
252 if (StackTraceInThrowable) {
253 java_lang_Throwable::fill_in_stack_trace(exception, method);
254 }
255 // Increment counter for hs_err file reporting
256 Atomic::inc(&Exceptions::_stack_overflow_errors, memory_order_relaxed);
257 } else {
258 // if prior exception, throw that one instead
259 exception = Handle(THREAD, THREAD->pending_exception());
260 }
261 _throw(THREAD, file, line, exception);
262 }
263
264 // All callers are expected to have ensured that the incoming expanded format string
265 // will be within reasonable limits - specifically we will never hit the INT_MAX limit
266 // of os::vsnprintf when it tries to report how big a buffer is needed. Even so we
267 // further limit the formatted output to 1024 characters.
268 void Exceptions::fthrow(JavaThread* thread, const char* file, int line, Symbol* h_name, const char* format, ...) {
269 const int max_msg_size = 1024;
270 va_list ap;
271 va_start(ap, format);
272 char msg[max_msg_size];
273 int ret = os::vsnprintf(msg, max_msg_size, format, ap);
274 va_end(ap);
275
276 // If ret == -1 then either there was a format conversion error, or the required buffer size
277 // exceeds INT_MAX and so couldn't be returned (undocumented behaviour of vsnprintf). Depending
278 // on the platform the buffer may be filled to its capacity (Linux), filled to the conversion
279 // that encountered the overflow (macOS), or is empty (Windows), so it is possible we
280 // have a truncated UTF-8 sequence. Similarly, if the buffer was too small and ret >= max_msg_size
281 // we may also have a truncated UTF-8 sequence. In such cases we need to fix the buffer so the UTF-8
282 // sequence is valid.
283 assert(ret != -1, "Caller should have ensured the incoming format string is size limited!");
284 if (ret == -1 || ret >= max_msg_size) {
285 int len = (int) strlen(msg);
286 if (len > 0) {
287 // Truncation will only happen if the buffer was filled by vsnprintf,
288 // otherwise vsnprintf already terminated filling it at a well-defined point.
289 // But as this is not a clearly specified area we will perform our own UTF8
290 // truncation anyway - though for those well-defined termination points it
291 // will be a no-op.
292 UTF8::truncate_to_legal_utf8((unsigned char*)msg, len + 1);
293 }
294 }
295 // UTF8::is_legal_utf8 should actually be called is_legal_utf8_class_name as the final
296 // parameter controls a check for a specific character appearing in the "name", which is only
297 // allowed for classfile versions <= 47. We pass `true` so that we allow such strings as this code
298 // know nothing about the actual string content.
299 assert(UTF8::is_legal_utf8((const unsigned char*)msg, strlen(msg), true), "must be");
300 _throw_msg(thread, file, line, h_name, msg);
301 }
302
303
304 // Creates an exception oop, calls the <init> method with the given signature.
305 // and returns a Handle
306 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
307 Symbol* signature, JavaCallArguments *args,
308 Handle h_loader) {
309 assert(Universe::is_fully_initialized(),
310 "cannot be called during initialization");
311 assert(!thread->has_pending_exception(), "already has exception");
312
313 Handle h_exception;
314
315 // Resolve exception klass, and check for pending exception below.
316 Klass* klass = SystemDictionary::resolve_or_fail(name, h_loader, true, thread);
317
318 if (!thread->has_pending_exception()) {
319 assert(klass != nullptr, "klass must exist");
320 h_exception = JavaCalls::construct_new_instance(InstanceKlass::cast(klass),
321 signature,
322 args,
323 thread);
324 }
325
326 // Check if another exception was thrown in the process, if so rethrow that one
327 if (thread->has_pending_exception()) {
328 h_exception = Handle(thread, thread->pending_exception());
329 thread->clear_pending_exception();
330 }
331 return h_exception;
332 }
333
334 // Creates an exception oop, calls the <init> method with the given signature.
335 // and returns a Handle
336 // Initializes the cause if cause non-null
337 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
338 Symbol* signature, JavaCallArguments *args,
339 Handle h_cause,
340 Handle h_loader) {
341 Handle h_exception = new_exception(thread, name, signature, args, h_loader);
342
343 // Future: object initializer should take a cause argument
344 if (h_cause.not_null()) {
345 assert(h_cause->is_a(vmClasses::Throwable_klass()),
346 "exception cause is not a subclass of java/lang/Throwable");
347 JavaValue result1(T_OBJECT);
348 JavaCallArguments args1;
349 args1.set_receiver(h_exception);
350 args1.push_oop(h_cause);
351 JavaCalls::call_virtual(&result1, h_exception->klass(),
352 vmSymbols::initCause_name(),
353 vmSymbols::throwable_throwable_signature(),
354 &args1,
355 thread);
356 }
357
358 // Check if another exception was thrown in the process, if so rethrow that one
359 if (thread->has_pending_exception()) {
360 h_exception = Handle(thread, thread->pending_exception());
361 thread->clear_pending_exception();
362 }
363 return h_exception;
364 }
365
366 // Convenience method. Calls either the <init>() or <init>(Throwable) method when
367 // creating a new exception
368 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
369 Handle h_cause,
370 Handle h_loader,
371 ExceptionMsgToUtf8Mode to_utf8_safe) {
372 JavaCallArguments args;
373 Symbol* signature = nullptr;
374 if (h_cause.is_null()) {
375 signature = vmSymbols::void_method_signature();
376 } else {
377 signature = vmSymbols::throwable_void_signature();
378 args.push_oop(h_cause);
379 }
380 return new_exception(thread, name, signature, &args, h_loader);
381 }
382
383 // Convenience method. Calls either the <init>() or <init>(String) method when
384 // creating a new exception
385 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
386 const char* message, Handle h_cause,
387 Handle h_loader,
388 ExceptionMsgToUtf8Mode to_utf8_safe) {
389 JavaCallArguments args;
390 Symbol* signature = nullptr;
391 if (message == nullptr) {
392 signature = vmSymbols::void_method_signature();
393 } else {
394 // There should be no pending exception. The caller is responsible for not calling
395 // this with a pending exception.
396 Handle incoming_exception;
397 if (thread->has_pending_exception()) {
398 incoming_exception = Handle(thread, thread->pending_exception());
399 thread->clear_pending_exception();
400 ResourceMark rm(thread);
401 assert(incoming_exception.is_null(), "Pending exception while throwing %s %s", name->as_C_string(), message);
402 }
403 Handle msg;
404 if (to_utf8_safe == safe_to_utf8) {
405 // Make a java UTF8 string.
406 msg = java_lang_String::create_from_str(message, thread);
407 } else {
408 // Make a java string keeping the encoding scheme of the original string.
409 msg = java_lang_String::create_from_platform_dependent_str(message, thread);
410 }
411 // If we get an exception from the allocation, prefer that to
412 // the exception we are trying to build, or the pending exception (in product mode)
413 if (thread->has_pending_exception()) {
414 Handle exception(thread, thread->pending_exception());
415 thread->clear_pending_exception();
416 return exception;
417 }
418 if (incoming_exception.not_null()) {
419 return incoming_exception;
420 }
421 args.push_oop(msg);
422 signature = vmSymbols::string_void_signature();
423 }
424 return new_exception(thread, name, signature, &args, h_cause, h_loader);
425 }
426
427 // Another convenience method that creates handles for null class loaders and null causes.
428 // If the last parameter 'to_utf8_mode' is safe_to_utf8,
429 // it means we can safely ignore the encoding scheme of the message string and
430 // convert it directly to a java UTF8 string. Otherwise, we need to take the
431 // encoding scheme of the string into account. One thing we should do at some
432 // point is to push this flag down to class java_lang_String since other
433 // classes may need similar functionalities.
434 Handle Exceptions::new_exception(JavaThread* thread, Symbol* name,
435 const char* message,
436 ExceptionMsgToUtf8Mode to_utf8_safe) {
437
438 Handle h_loader;
439 Handle h_cause;
440 return Exceptions::new_exception(thread, name, message, h_cause, h_loader,
441 to_utf8_safe);
442 }
443
444 // invokedynamic uses wrap_dynamic_exception for:
445 // - bootstrap method resolution
446 // - post call to MethodHandleNatives::linkCallSite
447 // dynamically computed constant uses wrap_dynamic_exception for:
448 // - bootstrap method resolution
449 // - post call to MethodHandleNatives::linkDynamicConstant
450 void Exceptions::wrap_dynamic_exception(bool is_indy, JavaThread* THREAD) {
451 if (THREAD->has_pending_exception()) {
452 bool log_indy = log_is_enabled(Debug, methodhandles, indy) && is_indy;
453 bool log_condy = log_is_enabled(Debug, methodhandles, condy) && !is_indy;
454 LogStreamHandle(Debug, methodhandles, indy) lsh_indy;
455 LogStreamHandle(Debug, methodhandles, condy) lsh_condy;
456 LogStream* ls = nullptr;
457 if (log_indy) {
458 ls = &lsh_indy;
459 } else if (log_condy) {
460 ls = &lsh_condy;
461 }
462 oop exception = THREAD->pending_exception();
463
464 // See the "Linking Exceptions" section for the invokedynamic instruction
465 // in JVMS 6.5.
466 if (exception->is_a(vmClasses::Error_klass())) {
467 // Pass through an Error, including BootstrapMethodError, any other form
468 // of linkage error, or say OutOfMemoryError
469 if (ls != nullptr) {
470 ResourceMark rm(THREAD);
471 ls->print_cr("bootstrap method invocation wraps BSME around " PTR_FORMAT, p2i(exception));
472 exception->print_on(ls);
473 }
474 return;
475 }
476
477 // Otherwise wrap the exception in a BootstrapMethodError
478 if (ls != nullptr) {
479 ResourceMark rm(THREAD);
480 ls->print_cr("%s throws BSME for " PTR_FORMAT, is_indy ? "invokedynamic" : "dynamic constant", p2i(exception));
481 exception->print_on(ls);
482 }
483 Handle nested_exception(THREAD, exception);
484 THREAD->clear_pending_exception();
485 THROW_CAUSE(vmSymbols::java_lang_BootstrapMethodError(), nested_exception)
486 }
487 }
488
489 // Exception counting for hs_err file
490 volatile int Exceptions::_stack_overflow_errors = 0;
491 volatile int Exceptions::_linkage_errors = 0;
492 volatile int Exceptions::_out_of_memory_error_java_heap_errors = 0;
493 volatile int Exceptions::_out_of_memory_error_metaspace_errors = 0;
494 volatile int Exceptions::_out_of_memory_error_class_metaspace_errors = 0;
495
496 void Exceptions::count_out_of_memory_exceptions(Handle exception) {
497 if (Universe::is_out_of_memory_error_metaspace(exception())) {
498 Atomic::inc(&_out_of_memory_error_metaspace_errors, memory_order_relaxed);
499 } else if (Universe::is_out_of_memory_error_class_metaspace(exception())) {
500 Atomic::inc(&_out_of_memory_error_class_metaspace_errors, memory_order_relaxed);
501 } else {
502 // everything else reported as java heap OOM
503 Atomic::inc(&_out_of_memory_error_java_heap_errors, memory_order_relaxed);
504 }
505 }
506
507 static void print_oom_count(outputStream* st, const char *err, int count) {
508 if (count > 0) {
509 st->print_cr("OutOfMemoryError %s=%d", err, count);
510 }
511 }
512
513 bool Exceptions::has_exception_counts() {
514 return (_stack_overflow_errors + _out_of_memory_error_java_heap_errors +
515 _out_of_memory_error_metaspace_errors + _out_of_memory_error_class_metaspace_errors) > 0;
516 }
517
518 void Exceptions::print_exception_counts_on_error(outputStream* st) {
519 print_oom_count(st, "java_heap_errors", _out_of_memory_error_java_heap_errors);
520 print_oom_count(st, "metaspace_errors", _out_of_memory_error_metaspace_errors);
521 print_oom_count(st, "class_metaspace_errors", _out_of_memory_error_class_metaspace_errors);
522 if (_stack_overflow_errors > 0) {
523 st->print_cr("StackOverflowErrors=%d", _stack_overflow_errors);
524 }
525 if (_linkage_errors > 0) {
526 st->print_cr("LinkageErrors=%d", _linkage_errors);
527 }
528 }
529
530 // Implementation of ExceptionMark
531
532 ExceptionMark::ExceptionMark(JavaThread* thread) {
533 assert(thread == JavaThread::current(), "must be");
534 _thread = thread;
535 check_no_pending_exception();
536 }
537
538 ExceptionMark::ExceptionMark() {
539 _thread = JavaThread::current();
540 check_no_pending_exception();
541 }
542
543 inline void ExceptionMark::check_no_pending_exception() {
544 if (_thread->has_pending_exception()) {
545 oop exception = _thread->pending_exception();
546 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
547 ResourceMark rm;
548 exception->print();
549 fatal("ExceptionMark constructor expects no pending exceptions");
550 }
551 }
552
553
554 ExceptionMark::~ExceptionMark() {
555 if (_thread->has_pending_exception()) {
556 Handle exception(_thread, _thread->pending_exception());
557 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
558 if (is_init_completed()) {
559 ResourceMark rm;
560 exception->print();
561 fatal("ExceptionMark destructor expects no pending exceptions");
562 } else {
563 vm_exit_during_initialization(exception);
564 }
565 }
566 }
567
568 // ----------------------------------------------------------------------------------------
569
570 // caller frees value_string if necessary
571 void Exceptions::debug_check_abort(const char *value_string, const char* message) {
572 if (AbortVMOnException != nullptr && value_string != nullptr &&
573 strstr(value_string, AbortVMOnException)) {
574 if (AbortVMOnExceptionMessage == nullptr || (message != nullptr &&
575 strstr(message, AbortVMOnExceptionMessage))) {
576 if (message == nullptr) {
577 fatal("Saw %s, aborting", value_string);
578 } else {
579 fatal("Saw %s: %s, aborting", value_string, message);
580 }
581 }
582 }
583 }
584
585 void Exceptions::debug_check_abort(Handle exception, const char* message) {
586 if (AbortVMOnException != nullptr) {
587 debug_check_abort_helper(exception, message);
588 }
589 }
590
591 void Exceptions::debug_check_abort_helper(Handle exception, const char* message) {
592 ResourceMark rm;
593 if (message == nullptr && exception->is_a(vmClasses::Throwable_klass())) {
594 oop msg = java_lang_Throwable::message(exception());
595 if (msg != nullptr) {
596 message = java_lang_String::as_utf8_string(msg);
597 }
598 }
599 debug_check_abort(exception()->klass()->external_name(), message);
600 }
601
602 // for logging exceptions
603 void Exceptions::log_exception(Handle exception, const char* message) {
604 ResourceMark rm;
605 const char* detail_message = java_lang_Throwable::message_as_utf8(exception());
606 if (detail_message != nullptr) {
607 log_info(exceptions)("Exception <%.*s: %.*s>\n thrown in %.*s",
608 MAX_LEN, exception->print_value_string(),
609 MAX_LEN, detail_message,
610 MAX_LEN, message);
611 } else {
612 log_info(exceptions)("Exception <%.*s>\n thrown in %.*s",
613 MAX_LEN, exception->print_value_string(),
614 MAX_LEN, message);
615 }
616 }
617
618 // This is called from InterpreterRuntime::exception_handler_for_exception(), which is the only
619 // easy way to be notified in the VM that an _athrow bytecode has been executed. (The alternative
620 // would be to add hooks into the interpreter and compiler, for all platforms ...).
621 //
622 // Unfortunately, InterpreterRuntime::exception_handler_for_exception() is called for every level
623 // of the Java stack when looking for an exception handler. To avoid excessive output,
624 // we print the stack only when the bci points to an _athrow bytecode.
625 //
626 // NOTE: exceptions that are NOT thrown by _athrow are handled by Exceptions::special_exception()
627 // and Exceptions::_throw()).
628 void Exceptions::log_exception_stacktrace(Handle exception, methodHandle method, int bci) {
629 if (!method->is_native() && (Bytecodes::Code) *method->bcp_from(bci) == Bytecodes::_athrow) {
630 // TODO: try to find a way to avoid repeated stacktraces when an exception gets re-thrown
631 // by a finally block
632 log_exception_stacktrace(exception);
633 }
634 }
635
636 // This should be called only from a live Java thread.
637 void Exceptions::log_exception_stacktrace(Handle exception) {
638 LogStreamHandle(Info, exceptions, stacktrace) st;
639 ResourceMark rm;
640 const char* detail_message = java_lang_Throwable::message_as_utf8(exception());
641 if (detail_message != nullptr) {
642 st.print_cr("Exception <%.*s: %.*s>",
643 MAX_LEN, exception->print_value_string(),
644 MAX_LEN, detail_message);
645 } else {
646 st.print_cr("Exception <%.*s>",
647 MAX_LEN, exception->print_value_string());
648 }
649 JavaThread* t = JavaThread::current();
650 if (t->has_last_Java_frame()) {
651 t->print_active_stack_on(&st);
652 } else {
653 st.print_cr("(Cannot print stracktrace)");
654 }
655 }