Mercurial > hg > truffle
annotate src/share/vm/utilities/exceptions.cpp @ 3763:e66f38dd58a9
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author | ysr |
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date | Wed, 08 Jun 2011 08:39:53 -0700 |
parents | 01147d8aac1d |
children | be4ca325525a f08d439fab8c |
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() |
95 || thread->is_Compiler_thread() ) { | |
96 // We do not care what kind of exception we get for the vm-thread or a thread which | |
97 // is compiling. We just install a dummy exception object | |
98 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
99 return true; | |
100 } | |
101 | |
102 return false; | |
103 } | |
104 | |
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105 bool Exceptions::special_exception(Thread* thread, const char* file, int line, Symbol* h_name, const char* message) { |
0 | 106 // bootstrapping check |
107 if (!Universe::is_fully_initialized()) { | |
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108 if (h_name == NULL) { |
0 | 109 // atleast an informative message. |
110 vm_exit_during_initialization("Exception", message); | |
111 } else { | |
112 vm_exit_during_initialization(h_name, message); | |
113 } | |
114 ShouldNotReachHere(); | |
115 } | |
116 | |
117 if (thread->is_VM_thread() | |
118 || thread->is_Compiler_thread() ) { | |
119 // We do not care what kind of exception we get for the vm-thread or a thread which | |
120 // is compiling. We just install a dummy exception object | |
121 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
122 return true; | |
123 } | |
124 return false; | |
125 } | |
126 | |
127 // This method should only be called from generated code, | |
128 // therefore the exception oop should be in the oopmap. | |
129 void Exceptions::_throw_oop(Thread* thread, const char* file, int line, oop exception) { | |
130 assert(exception != NULL, "exception should not be NULL"); | |
131 Handle h_exception = Handle(thread, exception); | |
132 _throw(thread, file, line, h_exception); | |
133 } | |
134 | |
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135 void Exceptions::_throw(Thread* thread, const char* file, int line, Handle h_exception, const char* message) { |
0 | 136 assert(h_exception() != NULL, "exception should not be NULL"); |
137 | |
138 // tracing (do this up front - so it works during boot strapping) | |
139 if (TraceExceptions) { | |
140 ttyLocker ttyl; | |
141 ResourceMark rm; | |
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142 tty->print_cr("Exception <%s>%s%s (" INTPTR_FORMAT " ) \n" |
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143 "thrown [%s, line %d]\nfor thread " INTPTR_FORMAT, |
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144 h_exception->print_value_string(), |
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145 message ? ": " : "", message ? message : "", |
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146 (address)h_exception(), file, line, thread); |
0 | 147 } |
148 // for AbortVMOnException flag | |
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149 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception, message)); |
0 | 150 |
151 // Check for special boot-strapping/vm-thread handling | |
152 if (special_exception(thread, file, line, h_exception)) return; | |
153 | |
1142 | 154 assert(h_exception->is_a(SystemDictionary::Throwable_klass()), "exception is not a subclass of java/lang/Throwable"); |
0 | 155 |
156 // set the pending exception | |
157 thread->set_pending_exception(h_exception(), file, line); | |
158 | |
159 // vm log | |
160 Events::log("throw_exception " INTPTR_FORMAT, (address)h_exception()); | |
161 } | |
162 | |
163 | |
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164 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 | 165 // Check for special boot-strapping/vm-thread handling |
166 if (special_exception(thread, file, line, h_name, message)) return; | |
167 // Create and throw exception | |
168 Handle h_cause(thread, NULL); | |
169 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
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170 _throw(thread, file, line, h_exception, message); |
0 | 171 } |
172 | |
173 // Throw an exception with a message and a cause | |
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174 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 | 175 // Check for special boot-strapping/vm-thread handling |
176 if (special_exception(thread, file, line, h_name, message)) return; | |
177 // Create and throw exception and init cause | |
178 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
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179 _throw(thread, file, line, h_exception, message); |
0 | 180 } |
181 | |
182 // This version already has a handle for name | |
183 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, | |
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184 Symbol* name, const char* message) { |
0 | 185 Handle h_loader(thread, NULL); |
186 Handle h_protection_domain(thread, NULL); | |
187 Exceptions::_throw_msg(thread, file, line, name, message, h_loader, h_protection_domain); | |
188 } | |
189 | |
190 // This version already has a handle for name | |
191 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, | |
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192 Symbol* name, const char* message, Handle cause) { |
0 | 193 Handle h_loader(thread, NULL); |
194 Handle h_protection_domain(thread, NULL); | |
195 Exceptions::_throw_msg_cause(thread, file, line, name, message, cause, h_loader, h_protection_domain); | |
196 } | |
197 | |
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198 void Exceptions::_throw_args(Thread* thread, const char* file, int line, Symbol* h_name, Symbol* h_signature, JavaCallArguments *args) { |
0 | 199 // Check for special boot-strapping/vm-thread handling |
200 if (special_exception(thread, file, line, h_name, NULL)) return; | |
201 // Create and throw exception | |
202 Handle h_loader(thread, NULL); | |
203 Handle h_prot(thread, NULL); | |
204 Handle h_cause(thread, NULL); | |
205 Handle exception = new_exception(thread, h_name, h_signature, args, h_cause, h_loader, h_prot); | |
206 _throw(thread, file, line, exception); | |
207 } | |
208 | |
209 | |
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210 void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line, methodHandle method) { |
0 | 211 Handle exception; |
212 if (!THREAD->has_pending_exception()) { | |
213 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
214 oop e = instanceKlass::cast(k)->allocate_instance(CHECK); | |
215 exception = Handle(THREAD, e); // fill_in_stack trace does gc | |
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216 assert(instanceKlass::cast(k)->is_initialized(), "need to increase min_stack_allowed calculation"); |
0 | 217 if (StackTraceInThrowable) { |
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218 java_lang_Throwable::fill_in_stack_trace(exception, method()); |
0 | 219 } |
220 } else { | |
221 // if prior exception, throw that one instead | |
222 exception = Handle(THREAD, THREAD->pending_exception()); | |
223 } | |
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224 _throw(THREAD, file, line, exception); |
0 | 225 } |
226 | |
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227 void Exceptions::fthrow(Thread* thread, const char* file, int line, Symbol* h_name, const char* format, ...) { |
0 | 228 const int max_msg_size = 1024; |
229 va_list ap; | |
230 va_start(ap, format); | |
231 char msg[max_msg_size]; | |
232 vsnprintf(msg, max_msg_size, format, ap); | |
233 msg[max_msg_size-1] = '\0'; | |
234 va_end(ap); | |
235 _throw_msg(thread, file, line, h_name, msg); | |
236 } | |
237 | |
238 // Creates an exception oop, calls the <init> method with the given signature. | |
239 // and returns a Handle | |
240 // Initializes the cause if cause non-null | |
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241 Handle Exceptions::new_exception(Thread *thread, Symbol* h_name, |
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242 Symbol* signature, |
0 | 243 JavaCallArguments *args, |
244 Handle h_cause, Handle h_loader, | |
245 Handle h_protection_domain) { | |
246 assert(Universe::is_fully_initialized(), | |
247 "cannot be called during initialization"); | |
248 assert(thread->is_Java_thread(), "can only be called by a Java thread"); | |
249 assert(!thread->has_pending_exception(), "already has exception"); | |
250 | |
251 Handle h_exception; | |
252 | |
253 // Resolve exception klass | |
254 klassOop ik = SystemDictionary::resolve_or_fail(h_name, h_loader, h_protection_domain, true, thread); | |
255 instanceKlassHandle klass (thread, ik); | |
256 | |
257 if (!thread->has_pending_exception()) { | |
258 assert(klass.not_null(), "klass must exist"); | |
259 // We are about to create an instance - so make sure that klass is initialized | |
260 klass->initialize(thread); | |
261 if (!thread->has_pending_exception()) { | |
262 // Allocate new exception | |
263 h_exception = klass->allocate_instance_handle(thread); | |
264 if (!thread->has_pending_exception()) { | |
265 JavaValue result(T_VOID); | |
266 args->set_receiver(h_exception); | |
267 // Call constructor | |
268 JavaCalls::call_special(&result, klass, | |
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269 vmSymbols::object_initializer_name(), |
0 | 270 signature, |
271 args, | |
272 thread); | |
273 | |
274 } | |
275 } | |
276 | |
277 // Future: object initializer should take a cause argument | |
278 if (h_cause() != NULL) { | |
1142 | 279 assert(h_cause->is_a(SystemDictionary::Throwable_klass()), |
0 | 280 "exception cause is not a subclass of java/lang/Throwable"); |
281 JavaValue result1(T_OBJECT); | |
282 JavaCallArguments args1; | |
283 args1.set_receiver(h_exception); | |
284 args1.push_oop(h_cause); | |
285 JavaCalls::call_virtual(&result1, klass, | |
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286 vmSymbols::initCause_name(), |
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287 vmSymbols::throwable_throwable_signature(), |
0 | 288 &args1, |
289 thread); | |
290 } | |
291 } | |
292 | |
293 // Check if another exception was thrown in the process, if so rethrow that one | |
294 if (thread->has_pending_exception()) { | |
295 h_exception = Handle(thread, thread->pending_exception()); | |
296 thread->clear_pending_exception(); | |
297 } | |
298 return h_exception; | |
299 } | |
300 | |
301 // Convenience method. Calls either the <init>() or <init>(String) method when | |
302 // creating a new exception | |
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303 Handle Exceptions::new_exception(Thread* thread, Symbol* h_name, |
0 | 304 const char* message, Handle h_cause, |
305 Handle h_loader, | |
306 Handle h_protection_domain, | |
307 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
308 JavaCallArguments args; | |
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309 Symbol* signature = NULL; |
0 | 310 if (message == NULL) { |
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311 signature = vmSymbols::void_method_signature(); |
0 | 312 } else { |
313 // We want to allocate storage, but we can't do that if there's | |
314 // a pending exception, so we preserve any pending exception | |
315 // around the allocation. | |
316 // If we get an exception from the allocation, prefer that to | |
317 // the exception we are trying to build, or the pending exception. | |
318 // This is sort of like what PRESERVE_EXCEPTION_MARK does, except | |
319 // for the preferencing and the early returns. | |
320 Handle incoming_exception (thread, NULL); | |
321 if (thread->has_pending_exception()) { | |
322 incoming_exception = Handle(thread, thread->pending_exception()); | |
323 thread->clear_pending_exception(); | |
324 } | |
325 Handle msg; | |
326 if (to_utf8_safe == safe_to_utf8) { | |
327 // Make a java UTF8 string. | |
328 msg = java_lang_String::create_from_str(message, thread); | |
329 } else { | |
330 // Make a java string keeping the encoding scheme of the original string. | |
331 msg = java_lang_String::create_from_platform_dependent_str(message, thread); | |
332 } | |
333 if (thread->has_pending_exception()) { | |
334 Handle exception(thread, thread->pending_exception()); | |
335 thread->clear_pending_exception(); | |
336 return exception; | |
337 } | |
338 if (incoming_exception.not_null()) { | |
339 return incoming_exception; | |
340 } | |
341 args.push_oop(msg); | |
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342 signature = vmSymbols::string_void_signature(); |
0 | 343 } |
344 return new_exception(thread, h_name, signature, &args, h_cause, h_loader, h_protection_domain); | |
345 } | |
346 | |
347 // Another convenience method that creates handles for null class loaders and | |
348 // protection domains and null causes. | |
349 // If the last parameter 'to_utf8_mode' is safe_to_utf8, | |
350 // it means we can safely ignore the encoding scheme of the message string and | |
351 // convert it directly to a java UTF8 string. Otherwise, we need to take the | |
352 // encoding scheme of the string into account. One thing we should do at some | |
353 // point is to push this flag down to class java_lang_String since other | |
354 // classes may need similar functionalities. | |
355 Handle Exceptions::new_exception(Thread* thread, | |
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356 Symbol* name, |
0 | 357 const char* message, |
358 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
359 | |
360 Handle h_loader(thread, NULL); | |
361 Handle h_prot(thread, NULL); | |
362 Handle h_cause(thread, NULL); | |
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363 return Exceptions::new_exception(thread, name, message, h_cause, h_loader, |
0 | 364 h_prot, to_utf8_safe); |
365 } | |
366 | |
367 // Implementation of ExceptionMark | |
368 | |
369 ExceptionMark::ExceptionMark(Thread*& thread) { | |
370 thread = Thread::current(); | |
371 _thread = thread; | |
372 if (_thread->has_pending_exception()) { | |
373 oop exception = _thread->pending_exception(); | |
374 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
375 exception->print(); | |
376 fatal("ExceptionMark constructor expects no pending exceptions"); | |
377 } | |
378 } | |
379 | |
380 | |
381 ExceptionMark::~ExceptionMark() { | |
382 if (_thread->has_pending_exception()) { | |
383 Handle exception(_thread, _thread->pending_exception()); | |
384 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
385 if (is_init_completed()) { | |
386 exception->print(); | |
387 fatal("ExceptionMark destructor expects no pending exceptions"); | |
388 } else { | |
389 vm_exit_during_initialization(exception); | |
390 } | |
391 } | |
392 } | |
393 | |
394 // ---------------------------------------------------------------------------------------- | |
395 | |
396 #ifndef PRODUCT | |
397 // caller frees value_string if necessary | |
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398 void Exceptions::debug_check_abort(const char *value_string, const char* message) { |
0 | 399 if (AbortVMOnException != NULL && value_string != NULL && |
400 strstr(value_string, AbortVMOnException)) { | |
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401 if (AbortVMOnExceptionMessage == NULL || message == NULL || |
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402 strcmp(message, AbortVMOnExceptionMessage) == 0) { |
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403 fatal(err_msg("Saw %s, aborting", value_string)); |
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404 } |
0 | 405 } |
406 } | |
407 | |
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408 void Exceptions::debug_check_abort(Handle exception, const char* message) { |
0 | 409 if (AbortVMOnException != NULL) { |
410 ResourceMark rm; | |
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411 if (message == NULL && exception->is_a(SystemDictionary::Throwable_klass())) { |
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412 oop msg = java_lang_Throwable::message(exception); |
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413 if (msg != NULL) { |
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414 message = java_lang_String::as_utf8_string(msg); |
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415 } |
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416 } |
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417 debug_check_abort(instanceKlass::cast(exception()->klass())->external_name(), message); |
0 | 418 } |
419 } | |
420 #endif |