Mercurial > hg > truffle
annotate src/share/vm/utilities/exceptions.cpp @ 3718:42e655a6a6f3
Added mx configuration.
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 16 Dec 2011 11:03:14 +0100 |
parents | be4ca325525a |
children | 04b9a2566eec |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
28 #include "compiler/compileBroker.hpp" | |
29 #include "oops/oop.inline.hpp" | |
30 #include "runtime/init.hpp" | |
31 #include "runtime/java.hpp" | |
32 #include "runtime/javaCalls.hpp" | |
33 #include "runtime/threadCritical.hpp" | |
34 #include "utilities/events.hpp" | |
35 #include "utilities/exceptions.hpp" | |
36 #ifdef TARGET_OS_FAMILY_linux | |
37 # include "thread_linux.inline.hpp" | |
38 #endif | |
39 #ifdef TARGET_OS_FAMILY_solaris | |
40 # include "thread_solaris.inline.hpp" | |
41 #endif | |
42 #ifdef TARGET_OS_FAMILY_windows | |
43 # include "thread_windows.inline.hpp" | |
44 #endif | |
0 | 45 |
46 | |
47 // Implementation of ThreadShadow | |
48 void check_ThreadShadow() { | |
49 const ByteSize offset1 = byte_offset_of(ThreadShadow, _pending_exception); | |
50 const ByteSize offset2 = Thread::pending_exception_offset(); | |
51 if (offset1 != offset2) fatal("ThreadShadow::_pending_exception is not positioned correctly"); | |
52 } | |
53 | |
54 | |
55 void ThreadShadow::set_pending_exception(oop exception, const char* file, int line) { | |
56 assert(exception != NULL && exception->is_oop(), "invalid exception oop"); | |
57 _pending_exception = exception; | |
58 _exception_file = file; | |
59 _exception_line = line; | |
60 } | |
61 | |
62 void ThreadShadow::clear_pending_exception() { | |
63 if (TraceClearedExceptions) { | |
64 if (_pending_exception != NULL) { | |
65 tty->print_cr("Thread::clear_pending_exception: cleared exception:"); | |
66 _pending_exception->print(); | |
67 } | |
68 } | |
69 _pending_exception = NULL; | |
70 _exception_file = NULL; | |
71 _exception_line = 0; | |
72 } | |
73 // Implementation of Exceptions | |
74 | |
75 bool Exceptions::special_exception(Thread* thread, const char* file, int line, Handle h_exception) { | |
76 // bootstrapping check | |
77 if (!Universe::is_fully_initialized()) { | |
78 vm_exit_during_initialization(h_exception); | |
79 ShouldNotReachHere(); | |
80 } | |
81 | |
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82 #ifdef ASSERT |
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83 // Check for trying to throw stack overflow before initialization is complete |
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84 // to prevent infinite recursion trying to initialize stack overflow without |
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85 // adequate stack space. |
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86 // This can happen with stress testing a large value of StackShadowPages |
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87 if (h_exception()->klass() == SystemDictionary::StackOverflowError_klass()) { |
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88 instanceKlass* ik = instanceKlass::cast(h_exception->klass()); |
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89 assert(ik->is_initialized(), |
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90 "need to increase min_stack_allowed calculation"); |
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91 } |
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92 #endif // ASSERT |
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93 |
0 | 94 if (thread->is_VM_thread() |
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95 // (tw) May we do this? |
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96 /*|| thread->is_Compiler_thread()*/ ) { |
0 | 97 // We do not care what kind of exception we get for the vm-thread or a thread which |
98 // is compiling. We just install a dummy exception object | |
99 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
100 return true; | |
101 } | |
102 | |
103 return false; | |
104 } | |
105 | |
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106 bool Exceptions::special_exception(Thread* thread, const char* file, int line, Symbol* h_name, const char* message) { |
0 | 107 // bootstrapping check |
108 if (!Universe::is_fully_initialized()) { | |
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109 if (h_name == NULL) { |
0 | 110 // atleast an informative message. |
111 vm_exit_during_initialization("Exception", message); | |
112 } else { | |
113 vm_exit_during_initialization(h_name, message); | |
114 } | |
115 ShouldNotReachHere(); | |
116 } | |
117 | |
118 if (thread->is_VM_thread() | |
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119 // (tw) May we do this? |
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120 /* || thread->is_Compiler_thread()*/ ) { |
0 | 121 // We do not care what kind of exception we get for the vm-thread or a thread which |
122 // is compiling. We just install a dummy exception object | |
123 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
124 return true; | |
125 } | |
126 return false; | |
127 } | |
128 | |
129 // This method should only be called from generated code, | |
130 // therefore the exception oop should be in the oopmap. | |
131 void Exceptions::_throw_oop(Thread* thread, const char* file, int line, oop exception) { | |
132 assert(exception != NULL, "exception should not be NULL"); | |
133 Handle h_exception = Handle(thread, exception); | |
134 _throw(thread, file, line, h_exception); | |
135 } | |
136 | |
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137 void Exceptions::_throw(Thread* thread, const char* file, int line, Handle h_exception, const char* message) { |
0 | 138 assert(h_exception() != NULL, "exception should not be NULL"); |
139 | |
140 // tracing (do this up front - so it works during boot strapping) | |
141 if (TraceExceptions) { | |
142 ttyLocker ttyl; | |
143 ResourceMark rm; | |
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144 tty->print_cr("Exception <%s>%s%s (" INTPTR_FORMAT " ) \n" |
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145 "thrown [%s, line %d]\nfor thread " INTPTR_FORMAT, |
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146 h_exception->print_value_string(), |
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147 message ? ": " : "", message ? message : "", |
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148 (address)h_exception(), file, line, thread); |
0 | 149 } |
150 // for AbortVMOnException flag | |
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151 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception, message)); |
0 | 152 |
153 // Check for special boot-strapping/vm-thread handling | |
154 if (special_exception(thread, file, line, h_exception)) return; | |
155 | |
1142 | 156 assert(h_exception->is_a(SystemDictionary::Throwable_klass()), "exception is not a subclass of java/lang/Throwable"); |
0 | 157 |
158 // set the pending exception | |
159 thread->set_pending_exception(h_exception(), file, line); | |
160 | |
161 // vm log | |
162 Events::log("throw_exception " INTPTR_FORMAT, (address)h_exception()); | |
163 } | |
164 | |
165 | |
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166 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, Symbol* h_name, const char* message, Handle h_loader, Handle h_protection_domain) { |
0 | 167 // Check for special boot-strapping/vm-thread handling |
168 if (special_exception(thread, file, line, h_name, message)) return; | |
169 // Create and throw exception | |
170 Handle h_cause(thread, NULL); | |
171 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
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172 _throw(thread, file, line, h_exception, message); |
0 | 173 } |
174 | |
175 // Throw an exception with a message and a cause | |
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176 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, Symbol* h_name, const char* message, Handle h_cause, Handle h_loader, Handle h_protection_domain) { |
0 | 177 // Check for special boot-strapping/vm-thread handling |
178 if (special_exception(thread, file, line, h_name, message)) return; | |
179 // Create and throw exception and init cause | |
180 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
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181 _throw(thread, file, line, h_exception, message); |
0 | 182 } |
183 | |
184 // This version already has a handle for name | |
185 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, | |
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186 Symbol* name, const char* message) { |
0 | 187 Handle h_loader(thread, NULL); |
188 Handle h_protection_domain(thread, NULL); | |
189 Exceptions::_throw_msg(thread, file, line, name, message, h_loader, h_protection_domain); | |
190 } | |
191 | |
192 // This version already has a handle for name | |
193 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, | |
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194 Symbol* name, const char* message, Handle cause) { |
0 | 195 Handle h_loader(thread, NULL); |
196 Handle h_protection_domain(thread, NULL); | |
197 Exceptions::_throw_msg_cause(thread, file, line, name, message, cause, h_loader, h_protection_domain); | |
198 } | |
199 | |
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200 void Exceptions::_throw_args(Thread* thread, const char* file, int line, Symbol* h_name, Symbol* h_signature, JavaCallArguments *args) { |
0 | 201 // Check for special boot-strapping/vm-thread handling |
202 if (special_exception(thread, file, line, h_name, NULL)) return; | |
203 // Create and throw exception | |
204 Handle h_loader(thread, NULL); | |
205 Handle h_prot(thread, NULL); | |
206 Handle h_cause(thread, NULL); | |
207 Handle exception = new_exception(thread, h_name, h_signature, args, h_cause, h_loader, h_prot); | |
208 _throw(thread, file, line, exception); | |
209 } | |
210 | |
211 | |
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212 void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line, methodHandle method) { |
0 | 213 Handle exception; |
214 if (!THREAD->has_pending_exception()) { | |
215 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
216 oop e = instanceKlass::cast(k)->allocate_instance(CHECK); | |
217 exception = Handle(THREAD, e); // fill_in_stack trace does gc | |
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218 assert(instanceKlass::cast(k)->is_initialized(), "need to increase min_stack_allowed calculation"); |
0 | 219 if (StackTraceInThrowable) { |
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220 java_lang_Throwable::fill_in_stack_trace(exception, method()); |
0 | 221 } |
222 } else { | |
223 // if prior exception, throw that one instead | |
224 exception = Handle(THREAD, THREAD->pending_exception()); | |
225 } | |
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226 _throw(THREAD, file, line, exception); |
0 | 227 } |
228 | |
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229 void Exceptions::fthrow(Thread* thread, const char* file, int line, Symbol* h_name, const char* format, ...) { |
0 | 230 const int max_msg_size = 1024; |
231 va_list ap; | |
232 va_start(ap, format); | |
233 char msg[max_msg_size]; | |
234 vsnprintf(msg, max_msg_size, format, ap); | |
235 msg[max_msg_size-1] = '\0'; | |
236 va_end(ap); | |
237 _throw_msg(thread, file, line, h_name, msg); | |
238 } | |
239 | |
240 // Creates an exception oop, calls the <init> method with the given signature. | |
241 // and returns a Handle | |
242 // Initializes the cause if cause non-null | |
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243 Handle Exceptions::new_exception(Thread *thread, Symbol* h_name, |
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244 Symbol* signature, |
0 | 245 JavaCallArguments *args, |
246 Handle h_cause, Handle h_loader, | |
247 Handle h_protection_domain) { | |
248 assert(Universe::is_fully_initialized(), | |
249 "cannot be called during initialization"); | |
250 assert(thread->is_Java_thread(), "can only be called by a Java thread"); | |
251 assert(!thread->has_pending_exception(), "already has exception"); | |
252 | |
253 Handle h_exception; | |
254 | |
255 // Resolve exception klass | |
256 klassOop ik = SystemDictionary::resolve_or_fail(h_name, h_loader, h_protection_domain, true, thread); | |
257 instanceKlassHandle klass (thread, ik); | |
258 | |
259 if (!thread->has_pending_exception()) { | |
260 assert(klass.not_null(), "klass must exist"); | |
261 // We are about to create an instance - so make sure that klass is initialized | |
262 klass->initialize(thread); | |
263 if (!thread->has_pending_exception()) { | |
264 // Allocate new exception | |
265 h_exception = klass->allocate_instance_handle(thread); | |
266 if (!thread->has_pending_exception()) { | |
267 JavaValue result(T_VOID); | |
268 args->set_receiver(h_exception); | |
269 // Call constructor | |
270 JavaCalls::call_special(&result, klass, | |
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271 vmSymbols::object_initializer_name(), |
0 | 272 signature, |
273 args, | |
274 thread); | |
275 | |
276 } | |
277 } | |
278 | |
279 // Future: object initializer should take a cause argument | |
280 if (h_cause() != NULL) { | |
1142 | 281 assert(h_cause->is_a(SystemDictionary::Throwable_klass()), |
0 | 282 "exception cause is not a subclass of java/lang/Throwable"); |
283 JavaValue result1(T_OBJECT); | |
284 JavaCallArguments args1; | |
285 args1.set_receiver(h_exception); | |
286 args1.push_oop(h_cause); | |
287 JavaCalls::call_virtual(&result1, klass, | |
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288 vmSymbols::initCause_name(), |
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289 vmSymbols::throwable_throwable_signature(), |
0 | 290 &args1, |
291 thread); | |
292 } | |
293 } | |
294 | |
295 // Check if another exception was thrown in the process, if so rethrow that one | |
296 if (thread->has_pending_exception()) { | |
297 h_exception = Handle(thread, thread->pending_exception()); | |
298 thread->clear_pending_exception(); | |
299 } | |
300 return h_exception; | |
301 } | |
302 | |
303 // Convenience method. Calls either the <init>() or <init>(String) method when | |
304 // creating a new exception | |
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305 Handle Exceptions::new_exception(Thread* thread, Symbol* h_name, |
0 | 306 const char* message, Handle h_cause, |
307 Handle h_loader, | |
308 Handle h_protection_domain, | |
309 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
310 JavaCallArguments args; | |
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311 Symbol* signature = NULL; |
0 | 312 if (message == NULL) { |
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313 signature = vmSymbols::void_method_signature(); |
0 | 314 } else { |
315 // We want to allocate storage, but we can't do that if there's | |
316 // a pending exception, so we preserve any pending exception | |
317 // around the allocation. | |
318 // If we get an exception from the allocation, prefer that to | |
319 // the exception we are trying to build, or the pending exception. | |
320 // This is sort of like what PRESERVE_EXCEPTION_MARK does, except | |
321 // for the preferencing and the early returns. | |
322 Handle incoming_exception (thread, NULL); | |
323 if (thread->has_pending_exception()) { | |
324 incoming_exception = Handle(thread, thread->pending_exception()); | |
325 thread->clear_pending_exception(); | |
326 } | |
327 Handle msg; | |
328 if (to_utf8_safe == safe_to_utf8) { | |
329 // Make a java UTF8 string. | |
330 msg = java_lang_String::create_from_str(message, thread); | |
331 } else { | |
332 // Make a java string keeping the encoding scheme of the original string. | |
333 msg = java_lang_String::create_from_platform_dependent_str(message, thread); | |
334 } | |
335 if (thread->has_pending_exception()) { | |
336 Handle exception(thread, thread->pending_exception()); | |
337 thread->clear_pending_exception(); | |
338 return exception; | |
339 } | |
340 if (incoming_exception.not_null()) { | |
341 return incoming_exception; | |
342 } | |
343 args.push_oop(msg); | |
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344 signature = vmSymbols::string_void_signature(); |
0 | 345 } |
346 return new_exception(thread, h_name, signature, &args, h_cause, h_loader, h_protection_domain); | |
347 } | |
348 | |
349 // Another convenience method that creates handles for null class loaders and | |
350 // protection domains and null causes. | |
351 // If the last parameter 'to_utf8_mode' is safe_to_utf8, | |
352 // it means we can safely ignore the encoding scheme of the message string and | |
353 // convert it directly to a java UTF8 string. Otherwise, we need to take the | |
354 // encoding scheme of the string into account. One thing we should do at some | |
355 // point is to push this flag down to class java_lang_String since other | |
356 // classes may need similar functionalities. | |
357 Handle Exceptions::new_exception(Thread* thread, | |
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358 Symbol* name, |
0 | 359 const char* message, |
360 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
361 | |
362 Handle h_loader(thread, NULL); | |
363 Handle h_prot(thread, NULL); | |
364 Handle h_cause(thread, NULL); | |
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365 return Exceptions::new_exception(thread, name, message, h_cause, h_loader, |
0 | 366 h_prot, to_utf8_safe); |
367 } | |
368 | |
369 // Implementation of ExceptionMark | |
370 | |
371 ExceptionMark::ExceptionMark(Thread*& thread) { | |
372 thread = Thread::current(); | |
373 _thread = thread; | |
374 if (_thread->has_pending_exception()) { | |
375 oop exception = _thread->pending_exception(); | |
376 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
377 exception->print(); | |
378 fatal("ExceptionMark constructor expects no pending exceptions"); | |
379 } | |
380 } | |
381 | |
382 | |
383 ExceptionMark::~ExceptionMark() { | |
384 if (_thread->has_pending_exception()) { | |
385 Handle exception(_thread, _thread->pending_exception()); | |
386 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
387 if (is_init_completed()) { | |
388 exception->print(); | |
389 fatal("ExceptionMark destructor expects no pending exceptions"); | |
390 } else { | |
391 vm_exit_during_initialization(exception); | |
392 } | |
393 } | |
394 } | |
395 | |
396 // ---------------------------------------------------------------------------------------- | |
397 | |
398 #ifndef PRODUCT | |
399 // caller frees value_string if necessary | |
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400 void Exceptions::debug_check_abort(const char *value_string, const char* message) { |
0 | 401 if (AbortVMOnException != NULL && value_string != NULL && |
402 strstr(value_string, AbortVMOnException)) { | |
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403 if (AbortVMOnExceptionMessage == NULL || message == NULL || |
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404 strcmp(message, AbortVMOnExceptionMessage) == 0) { |
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405 fatal(err_msg("Saw %s, aborting", value_string)); |
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406 } |
0 | 407 } |
408 } | |
409 | |
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410 void Exceptions::debug_check_abort(Handle exception, const char* message) { |
0 | 411 if (AbortVMOnException != NULL) { |
412 ResourceMark rm; | |
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413 if (message == NULL && exception->is_a(SystemDictionary::Throwable_klass())) { |
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414 oop msg = java_lang_Throwable::message(exception); |
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415 if (msg != NULL) { |
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416 message = java_lang_String::as_utf8_string(msg); |
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417 } |
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418 } |
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419 debug_check_abort(instanceKlass::cast(exception()->klass())->external_name(), message); |
0 | 420 } |
421 } | |
422 #endif |