Mercurial > hg > truffle
comparison src/share/vm/utilities/exceptions.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | fcb148c6b605 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 1998-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_exceptions.cpp.incl" | |
27 | |
28 | |
29 // Implementation of ThreadShadow | |
30 void check_ThreadShadow() { | |
31 const ByteSize offset1 = byte_offset_of(ThreadShadow, _pending_exception); | |
32 const ByteSize offset2 = Thread::pending_exception_offset(); | |
33 if (offset1 != offset2) fatal("ThreadShadow::_pending_exception is not positioned correctly"); | |
34 } | |
35 | |
36 | |
37 void ThreadShadow::set_pending_exception(oop exception, const char* file, int line) { | |
38 assert(exception != NULL && exception->is_oop(), "invalid exception oop"); | |
39 _pending_exception = exception; | |
40 _exception_file = file; | |
41 _exception_line = line; | |
42 } | |
43 | |
44 void ThreadShadow::clear_pending_exception() { | |
45 if (TraceClearedExceptions) { | |
46 if (_pending_exception != NULL) { | |
47 tty->print_cr("Thread::clear_pending_exception: cleared exception:"); | |
48 _pending_exception->print(); | |
49 } | |
50 } | |
51 _pending_exception = NULL; | |
52 _exception_file = NULL; | |
53 _exception_line = 0; | |
54 } | |
55 // Implementation of Exceptions | |
56 | |
57 bool Exceptions::special_exception(Thread* thread, const char* file, int line, Handle h_exception) { | |
58 // bootstrapping check | |
59 if (!Universe::is_fully_initialized()) { | |
60 vm_exit_during_initialization(h_exception); | |
61 ShouldNotReachHere(); | |
62 } | |
63 | |
64 if (thread->is_VM_thread() | |
65 || thread->is_Compiler_thread() ) { | |
66 // We do not care what kind of exception we get for the vm-thread or a thread which | |
67 // is compiling. We just install a dummy exception object | |
68 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
69 return true; | |
70 } | |
71 | |
72 return false; | |
73 } | |
74 | |
75 bool Exceptions::special_exception(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message) { | |
76 // bootstrapping check | |
77 if (!Universe::is_fully_initialized()) { | |
78 if (h_name.is_null()) { | |
79 // atleast an informative message. | |
80 vm_exit_during_initialization("Exception", message); | |
81 } else { | |
82 vm_exit_during_initialization(h_name, message); | |
83 } | |
84 ShouldNotReachHere(); | |
85 } | |
86 | |
87 if (thread->is_VM_thread() | |
88 || thread->is_Compiler_thread() ) { | |
89 // We do not care what kind of exception we get for the vm-thread or a thread which | |
90 // is compiling. We just install a dummy exception object | |
91 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
92 return true; | |
93 } | |
94 | |
95 return false; | |
96 } | |
97 | |
98 // This method should only be called from generated code, | |
99 // therefore the exception oop should be in the oopmap. | |
100 void Exceptions::_throw_oop(Thread* thread, const char* file, int line, oop exception) { | |
101 assert(exception != NULL, "exception should not be NULL"); | |
102 Handle h_exception = Handle(thread, exception); | |
103 _throw(thread, file, line, h_exception); | |
104 } | |
105 | |
106 void Exceptions::_throw(Thread* thread, const char* file, int line, Handle h_exception) { | |
107 assert(h_exception() != NULL, "exception should not be NULL"); | |
108 | |
109 // tracing (do this up front - so it works during boot strapping) | |
110 if (TraceExceptions) { | |
111 ttyLocker ttyl; | |
112 ResourceMark rm; | |
113 tty->print_cr("Exception <%s> (" INTPTR_FORMAT " ) \nthrown [%s, line %d]\nfor thread " INTPTR_FORMAT, | |
114 h_exception->print_value_string(), (address)h_exception(), file, line, thread); | |
115 } | |
116 // for AbortVMOnException flag | |
117 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); | |
118 | |
119 // Check for special boot-strapping/vm-thread handling | |
120 if (special_exception(thread, file, line, h_exception)) return; | |
121 | |
122 assert(h_exception->is_a(SystemDictionary::throwable_klass()), "exception is not a subclass of java/lang/Throwable"); | |
123 | |
124 // set the pending exception | |
125 thread->set_pending_exception(h_exception(), file, line); | |
126 | |
127 // vm log | |
128 Events::log("throw_exception " INTPTR_FORMAT, (address)h_exception()); | |
129 } | |
130 | |
131 | |
132 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message, Handle h_loader, Handle h_protection_domain) { | |
133 // Check for special boot-strapping/vm-thread handling | |
134 if (special_exception(thread, file, line, h_name, message)) return; | |
135 // Create and throw exception | |
136 Handle h_cause(thread, NULL); | |
137 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
138 _throw(thread, file, line, h_exception); | |
139 } | |
140 | |
141 // Throw an exception with a message and a cause | |
142 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message, Handle h_cause, Handle h_loader, Handle h_protection_domain) { | |
143 // Check for special boot-strapping/vm-thread handling | |
144 if (special_exception(thread, file, line, h_name, message)) return; | |
145 // Create and throw exception and init cause | |
146 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
147 _throw(thread, file, line, h_exception); | |
148 } | |
149 | |
150 // This version creates handles and calls the other version | |
151 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, | |
152 symbolOop name, const char* message) { | |
153 symbolHandle h_name(thread, name); | |
154 Handle h_loader(thread, NULL); | |
155 Handle h_protection_domain(thread, NULL); | |
156 Exceptions::_throw_msg(thread, file, line, h_name, message, h_loader, h_protection_domain); | |
157 } | |
158 | |
159 // This version already has a handle for name | |
160 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, | |
161 symbolHandle name, const char* message) { | |
162 Handle h_loader(thread, NULL); | |
163 Handle h_protection_domain(thread, NULL); | |
164 Exceptions::_throw_msg(thread, file, line, name, message, h_loader, h_protection_domain); | |
165 } | |
166 | |
167 // This version already has a handle for name | |
168 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, | |
169 symbolHandle name, const char* message, Handle cause) { | |
170 Handle h_loader(thread, NULL); | |
171 Handle h_protection_domain(thread, NULL); | |
172 Exceptions::_throw_msg_cause(thread, file, line, name, message, cause, h_loader, h_protection_domain); | |
173 } | |
174 | |
175 void Exceptions::_throw_args(Thread* thread, const char* file, int line, symbolHandle h_name, symbolHandle h_signature, JavaCallArguments *args) { | |
176 // Check for special boot-strapping/vm-thread handling | |
177 if (special_exception(thread, file, line, h_name, NULL)) return; | |
178 // Create and throw exception | |
179 Handle h_loader(thread, NULL); | |
180 Handle h_prot(thread, NULL); | |
181 Handle h_cause(thread, NULL); | |
182 Handle exception = new_exception(thread, h_name, h_signature, args, h_cause, h_loader, h_prot); | |
183 _throw(thread, file, line, exception); | |
184 } | |
185 | |
186 | |
187 void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line) { | |
188 Handle exception; | |
189 if (!THREAD->has_pending_exception()) { | |
190 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
191 oop e = instanceKlass::cast(k)->allocate_instance(CHECK); | |
192 exception = Handle(THREAD, e); // fill_in_stack trace does gc | |
193 if (StackTraceInThrowable) { | |
194 java_lang_Throwable::fill_in_stack_trace(exception); | |
195 } | |
196 } else { | |
197 // if prior exception, throw that one instead | |
198 exception = Handle(THREAD, THREAD->pending_exception()); | |
199 } | |
200 _throw_oop(THREAD, file, line, exception()); | |
201 } | |
202 | |
203 void Exceptions::fthrow(Thread* thread, const char* file, int line, symbolHandle h_name, const char* format, ...) { | |
204 const int max_msg_size = 1024; | |
205 va_list ap; | |
206 va_start(ap, format); | |
207 char msg[max_msg_size]; | |
208 vsnprintf(msg, max_msg_size, format, ap); | |
209 msg[max_msg_size-1] = '\0'; | |
210 va_end(ap); | |
211 _throw_msg(thread, file, line, h_name, msg); | |
212 } | |
213 | |
214 // Creates an exception oop, calls the <init> method with the given signature. | |
215 // and returns a Handle | |
216 // Initializes the cause if cause non-null | |
217 Handle Exceptions::new_exception(Thread *thread, symbolHandle h_name, | |
218 symbolHandle signature, | |
219 JavaCallArguments *args, | |
220 Handle h_cause, Handle h_loader, | |
221 Handle h_protection_domain) { | |
222 assert(Universe::is_fully_initialized(), | |
223 "cannot be called during initialization"); | |
224 assert(thread->is_Java_thread(), "can only be called by a Java thread"); | |
225 assert(!thread->has_pending_exception(), "already has exception"); | |
226 | |
227 Handle h_exception; | |
228 | |
229 // Resolve exception klass | |
230 klassOop ik = SystemDictionary::resolve_or_fail(h_name, h_loader, h_protection_domain, true, thread); | |
231 instanceKlassHandle klass (thread, ik); | |
232 | |
233 if (!thread->has_pending_exception()) { | |
234 assert(klass.not_null(), "klass must exist"); | |
235 // We are about to create an instance - so make sure that klass is initialized | |
236 klass->initialize(thread); | |
237 if (!thread->has_pending_exception()) { | |
238 // Allocate new exception | |
239 h_exception = klass->allocate_instance_handle(thread); | |
240 if (!thread->has_pending_exception()) { | |
241 JavaValue result(T_VOID); | |
242 args->set_receiver(h_exception); | |
243 // Call constructor | |
244 JavaCalls::call_special(&result, klass, | |
245 vmSymbolHandles::object_initializer_name(), | |
246 signature, | |
247 args, | |
248 thread); | |
249 | |
250 } | |
251 } | |
252 | |
253 // Future: object initializer should take a cause argument | |
254 if (h_cause() != NULL) { | |
255 assert(h_cause->is_a(SystemDictionary::throwable_klass()), | |
256 "exception cause is not a subclass of java/lang/Throwable"); | |
257 JavaValue result1(T_OBJECT); | |
258 JavaCallArguments args1; | |
259 args1.set_receiver(h_exception); | |
260 args1.push_oop(h_cause); | |
261 JavaCalls::call_virtual(&result1, klass, | |
262 vmSymbolHandles::initCause_name(), | |
263 vmSymbolHandles::throwable_throwable_signature(), | |
264 &args1, | |
265 thread); | |
266 } | |
267 } | |
268 | |
269 // Check if another exception was thrown in the process, if so rethrow that one | |
270 if (thread->has_pending_exception()) { | |
271 h_exception = Handle(thread, thread->pending_exception()); | |
272 thread->clear_pending_exception(); | |
273 } | |
274 return h_exception; | |
275 } | |
276 | |
277 // Convenience method. Calls either the <init>() or <init>(String) method when | |
278 // creating a new exception | |
279 Handle Exceptions::new_exception(Thread* thread, symbolHandle h_name, | |
280 const char* message, Handle h_cause, | |
281 Handle h_loader, | |
282 Handle h_protection_domain, | |
283 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
284 JavaCallArguments args; | |
285 symbolHandle signature; | |
286 if (message == NULL) { | |
287 signature = vmSymbolHandles::void_method_signature(); | |
288 } else { | |
289 // We want to allocate storage, but we can't do that if there's | |
290 // a pending exception, so we preserve any pending exception | |
291 // around the allocation. | |
292 // If we get an exception from the allocation, prefer that to | |
293 // the exception we are trying to build, or the pending exception. | |
294 // This is sort of like what PRESERVE_EXCEPTION_MARK does, except | |
295 // for the preferencing and the early returns. | |
296 Handle incoming_exception (thread, NULL); | |
297 if (thread->has_pending_exception()) { | |
298 incoming_exception = Handle(thread, thread->pending_exception()); | |
299 thread->clear_pending_exception(); | |
300 } | |
301 Handle msg; | |
302 if (to_utf8_safe == safe_to_utf8) { | |
303 // Make a java UTF8 string. | |
304 msg = java_lang_String::create_from_str(message, thread); | |
305 } else { | |
306 // Make a java string keeping the encoding scheme of the original string. | |
307 msg = java_lang_String::create_from_platform_dependent_str(message, thread); | |
308 } | |
309 if (thread->has_pending_exception()) { | |
310 Handle exception(thread, thread->pending_exception()); | |
311 thread->clear_pending_exception(); | |
312 return exception; | |
313 } | |
314 if (incoming_exception.not_null()) { | |
315 return incoming_exception; | |
316 } | |
317 args.push_oop(msg); | |
318 signature = vmSymbolHandles::string_void_signature(); | |
319 } | |
320 return new_exception(thread, h_name, signature, &args, h_cause, h_loader, h_protection_domain); | |
321 } | |
322 | |
323 // Another convenience method that creates handles for null class loaders and | |
324 // protection domains and null causes. | |
325 // If the last parameter 'to_utf8_mode' is safe_to_utf8, | |
326 // it means we can safely ignore the encoding scheme of the message string and | |
327 // convert it directly to a java UTF8 string. Otherwise, we need to take the | |
328 // encoding scheme of the string into account. One thing we should do at some | |
329 // point is to push this flag down to class java_lang_String since other | |
330 // classes may need similar functionalities. | |
331 Handle Exceptions::new_exception(Thread* thread, | |
332 symbolOop name, | |
333 const char* message, | |
334 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
335 | |
336 symbolHandle h_name(thread, name); | |
337 Handle h_loader(thread, NULL); | |
338 Handle h_prot(thread, NULL); | |
339 Handle h_cause(thread, NULL); | |
340 return Exceptions::new_exception(thread, h_name, message, h_cause, h_loader, | |
341 h_prot, to_utf8_safe); | |
342 } | |
343 | |
344 // Implementation of ExceptionMark | |
345 | |
346 ExceptionMark::ExceptionMark(Thread*& thread) { | |
347 thread = Thread::current(); | |
348 _thread = thread; | |
349 if (_thread->has_pending_exception()) { | |
350 oop exception = _thread->pending_exception(); | |
351 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
352 exception->print(); | |
353 fatal("ExceptionMark constructor expects no pending exceptions"); | |
354 } | |
355 } | |
356 | |
357 | |
358 ExceptionMark::~ExceptionMark() { | |
359 if (_thread->has_pending_exception()) { | |
360 Handle exception(_thread, _thread->pending_exception()); | |
361 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
362 if (is_init_completed()) { | |
363 exception->print(); | |
364 fatal("ExceptionMark destructor expects no pending exceptions"); | |
365 } else { | |
366 vm_exit_during_initialization(exception); | |
367 } | |
368 } | |
369 } | |
370 | |
371 // ---------------------------------------------------------------------------------------- | |
372 | |
373 #ifndef PRODUCT | |
374 // caller frees value_string if necessary | |
375 void Exceptions::debug_check_abort(const char *value_string) { | |
376 if (AbortVMOnException != NULL && value_string != NULL && | |
377 strstr(value_string, AbortVMOnException)) { | |
378 fatal1("Saw %s, aborting", value_string); | |
379 } | |
380 } | |
381 | |
382 void Exceptions::debug_check_abort(Handle exception) { | |
383 if (AbortVMOnException != NULL) { | |
384 ResourceMark rm; | |
385 debug_check_abort(instanceKlass::cast(exception()->klass())->external_name()); | |
386 } | |
387 } | |
388 #endif |