Mercurial > hg > truffle
annotate src/share/vm/utilities/exceptions.cpp @ 2019:09b4dd4f152b
7004582: Add GetThisObject() function to JVMTI 1.2
Summary: Add 'GetThisObject' function
Reviewed-by: never, coleenp
author | kamg |
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date | Thu, 09 Dec 2010 15:04:26 -0500 |
parents | f95d63e2154a |
children | 06f017f7daa7 3582bf76420e |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1998, 2010, 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 | |
105 bool Exceptions::special_exception(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message) { | |
106 // bootstrapping check | |
107 if (!Universe::is_fully_initialized()) { | |
108 if (h_name.is_null()) { | |
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 | |
164 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message, Handle h_loader, Handle h_protection_domain) { | |
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 | |
174 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) { | |
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 creates handles and calls the other version | |
183 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, | |
184 symbolOop name, const char* message) { | |
185 symbolHandle h_name(thread, name); | |
186 Handle h_loader(thread, NULL); | |
187 Handle h_protection_domain(thread, NULL); | |
188 Exceptions::_throw_msg(thread, file, line, h_name, message, h_loader, h_protection_domain); | |
189 } | |
190 | |
191 // This version already has a handle for name | |
192 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, | |
193 symbolHandle name, const char* message) { | |
194 Handle h_loader(thread, NULL); | |
195 Handle h_protection_domain(thread, NULL); | |
196 Exceptions::_throw_msg(thread, file, line, name, message, h_loader, h_protection_domain); | |
197 } | |
198 | |
199 // This version already has a handle for name | |
200 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, | |
201 symbolHandle name, const char* message, Handle cause) { | |
202 Handle h_loader(thread, NULL); | |
203 Handle h_protection_domain(thread, NULL); | |
204 Exceptions::_throw_msg_cause(thread, file, line, name, message, cause, h_loader, h_protection_domain); | |
205 } | |
206 | |
207 void Exceptions::_throw_args(Thread* thread, const char* file, int line, symbolHandle h_name, symbolHandle h_signature, JavaCallArguments *args) { | |
208 // Check for special boot-strapping/vm-thread handling | |
209 if (special_exception(thread, file, line, h_name, NULL)) return; | |
210 // Create and throw exception | |
211 Handle h_loader(thread, NULL); | |
212 Handle h_prot(thread, NULL); | |
213 Handle h_cause(thread, NULL); | |
214 Handle exception = new_exception(thread, h_name, h_signature, args, h_cause, h_loader, h_prot); | |
215 _throw(thread, file, line, exception); | |
216 } | |
217 | |
218 | |
219 void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line) { | |
220 Handle exception; | |
221 if (!THREAD->has_pending_exception()) { | |
222 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
223 oop e = instanceKlass::cast(k)->allocate_instance(CHECK); | |
224 exception = Handle(THREAD, e); // fill_in_stack trace does gc | |
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225 assert(instanceKlass::cast(k)->is_initialized(), "need to increase min_stack_allowed calculation"); |
0 | 226 if (StackTraceInThrowable) { |
227 java_lang_Throwable::fill_in_stack_trace(exception); | |
228 } | |
229 } else { | |
230 // if prior exception, throw that one instead | |
231 exception = Handle(THREAD, THREAD->pending_exception()); | |
232 } | |
233 _throw_oop(THREAD, file, line, exception()); | |
234 } | |
235 | |
236 void Exceptions::fthrow(Thread* thread, const char* file, int line, symbolHandle h_name, const char* format, ...) { | |
237 const int max_msg_size = 1024; | |
238 va_list ap; | |
239 va_start(ap, format); | |
240 char msg[max_msg_size]; | |
241 vsnprintf(msg, max_msg_size, format, ap); | |
242 msg[max_msg_size-1] = '\0'; | |
243 va_end(ap); | |
244 _throw_msg(thread, file, line, h_name, msg); | |
245 } | |
246 | |
247 // Creates an exception oop, calls the <init> method with the given signature. | |
248 // and returns a Handle | |
249 // Initializes the cause if cause non-null | |
250 Handle Exceptions::new_exception(Thread *thread, symbolHandle h_name, | |
251 symbolHandle signature, | |
252 JavaCallArguments *args, | |
253 Handle h_cause, Handle h_loader, | |
254 Handle h_protection_domain) { | |
255 assert(Universe::is_fully_initialized(), | |
256 "cannot be called during initialization"); | |
257 assert(thread->is_Java_thread(), "can only be called by a Java thread"); | |
258 assert(!thread->has_pending_exception(), "already has exception"); | |
259 | |
260 Handle h_exception; | |
261 | |
262 // Resolve exception klass | |
263 klassOop ik = SystemDictionary::resolve_or_fail(h_name, h_loader, h_protection_domain, true, thread); | |
264 instanceKlassHandle klass (thread, ik); | |
265 | |
266 if (!thread->has_pending_exception()) { | |
267 assert(klass.not_null(), "klass must exist"); | |
268 // We are about to create an instance - so make sure that klass is initialized | |
269 klass->initialize(thread); | |
270 if (!thread->has_pending_exception()) { | |
271 // Allocate new exception | |
272 h_exception = klass->allocate_instance_handle(thread); | |
273 if (!thread->has_pending_exception()) { | |
274 JavaValue result(T_VOID); | |
275 args->set_receiver(h_exception); | |
276 // Call constructor | |
277 JavaCalls::call_special(&result, klass, | |
278 vmSymbolHandles::object_initializer_name(), | |
279 signature, | |
280 args, | |
281 thread); | |
282 | |
283 } | |
284 } | |
285 | |
286 // Future: object initializer should take a cause argument | |
287 if (h_cause() != NULL) { | |
1142 | 288 assert(h_cause->is_a(SystemDictionary::Throwable_klass()), |
0 | 289 "exception cause is not a subclass of java/lang/Throwable"); |
290 JavaValue result1(T_OBJECT); | |
291 JavaCallArguments args1; | |
292 args1.set_receiver(h_exception); | |
293 args1.push_oop(h_cause); | |
294 JavaCalls::call_virtual(&result1, klass, | |
295 vmSymbolHandles::initCause_name(), | |
296 vmSymbolHandles::throwable_throwable_signature(), | |
297 &args1, | |
298 thread); | |
299 } | |
300 } | |
301 | |
302 // Check if another exception was thrown in the process, if so rethrow that one | |
303 if (thread->has_pending_exception()) { | |
304 h_exception = Handle(thread, thread->pending_exception()); | |
305 thread->clear_pending_exception(); | |
306 } | |
307 return h_exception; | |
308 } | |
309 | |
310 // Convenience method. Calls either the <init>() or <init>(String) method when | |
311 // creating a new exception | |
312 Handle Exceptions::new_exception(Thread* thread, symbolHandle h_name, | |
313 const char* message, Handle h_cause, | |
314 Handle h_loader, | |
315 Handle h_protection_domain, | |
316 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
317 JavaCallArguments args; | |
318 symbolHandle signature; | |
319 if (message == NULL) { | |
320 signature = vmSymbolHandles::void_method_signature(); | |
321 } else { | |
322 // We want to allocate storage, but we can't do that if there's | |
323 // a pending exception, so we preserve any pending exception | |
324 // around the allocation. | |
325 // If we get an exception from the allocation, prefer that to | |
326 // the exception we are trying to build, or the pending exception. | |
327 // This is sort of like what PRESERVE_EXCEPTION_MARK does, except | |
328 // for the preferencing and the early returns. | |
329 Handle incoming_exception (thread, NULL); | |
330 if (thread->has_pending_exception()) { | |
331 incoming_exception = Handle(thread, thread->pending_exception()); | |
332 thread->clear_pending_exception(); | |
333 } | |
334 Handle msg; | |
335 if (to_utf8_safe == safe_to_utf8) { | |
336 // Make a java UTF8 string. | |
337 msg = java_lang_String::create_from_str(message, thread); | |
338 } else { | |
339 // Make a java string keeping the encoding scheme of the original string. | |
340 msg = java_lang_String::create_from_platform_dependent_str(message, thread); | |
341 } | |
342 if (thread->has_pending_exception()) { | |
343 Handle exception(thread, thread->pending_exception()); | |
344 thread->clear_pending_exception(); | |
345 return exception; | |
346 } | |
347 if (incoming_exception.not_null()) { | |
348 return incoming_exception; | |
349 } | |
350 args.push_oop(msg); | |
351 signature = vmSymbolHandles::string_void_signature(); | |
352 } | |
353 return new_exception(thread, h_name, signature, &args, h_cause, h_loader, h_protection_domain); | |
354 } | |
355 | |
356 // Another convenience method that creates handles for null class loaders and | |
357 // protection domains and null causes. | |
358 // If the last parameter 'to_utf8_mode' is safe_to_utf8, | |
359 // it means we can safely ignore the encoding scheme of the message string and | |
360 // convert it directly to a java UTF8 string. Otherwise, we need to take the | |
361 // encoding scheme of the string into account. One thing we should do at some | |
362 // point is to push this flag down to class java_lang_String since other | |
363 // classes may need similar functionalities. | |
364 Handle Exceptions::new_exception(Thread* thread, | |
365 symbolOop name, | |
366 const char* message, | |
367 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
368 | |
369 symbolHandle h_name(thread, name); | |
370 Handle h_loader(thread, NULL); | |
371 Handle h_prot(thread, NULL); | |
372 Handle h_cause(thread, NULL); | |
373 return Exceptions::new_exception(thread, h_name, message, h_cause, h_loader, | |
374 h_prot, to_utf8_safe); | |
375 } | |
376 | |
377 // Implementation of ExceptionMark | |
378 | |
379 ExceptionMark::ExceptionMark(Thread*& thread) { | |
380 thread = Thread::current(); | |
381 _thread = thread; | |
382 if (_thread->has_pending_exception()) { | |
383 oop exception = _thread->pending_exception(); | |
384 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
385 exception->print(); | |
386 fatal("ExceptionMark constructor expects no pending exceptions"); | |
387 } | |
388 } | |
389 | |
390 | |
391 ExceptionMark::~ExceptionMark() { | |
392 if (_thread->has_pending_exception()) { | |
393 Handle exception(_thread, _thread->pending_exception()); | |
394 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
395 if (is_init_completed()) { | |
396 exception->print(); | |
397 fatal("ExceptionMark destructor expects no pending exceptions"); | |
398 } else { | |
399 vm_exit_during_initialization(exception); | |
400 } | |
401 } | |
402 } | |
403 | |
404 // ---------------------------------------------------------------------------------------- | |
405 | |
406 #ifndef PRODUCT | |
407 // caller frees value_string if necessary | |
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408 void Exceptions::debug_check_abort(const char *value_string, const char* message) { |
0 | 409 if (AbortVMOnException != NULL && value_string != NULL && |
410 strstr(value_string, AbortVMOnException)) { | |
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411 if (AbortVMOnExceptionMessage == NULL || message == NULL || |
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412 strcmp(message, AbortVMOnExceptionMessage) == 0) { |
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413 fatal(err_msg("Saw %s, aborting", value_string)); |
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414 } |
0 | 415 } |
416 } | |
417 | |
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418 void Exceptions::debug_check_abort(Handle exception, const char* message) { |
0 | 419 if (AbortVMOnException != NULL) { |
420 ResourceMark rm; | |
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421 if (message == NULL && exception->is_a(SystemDictionary::Throwable_klass())) { |
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422 oop msg = java_lang_Throwable::message(exception); |
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423 if (msg != NULL) { |
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424 message = java_lang_String::as_utf8_string(msg); |
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425 } |
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426 } |
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427 debug_check_abort(instanceKlass::cast(exception()->klass())->external_name(), message); |
0 | 428 } |
429 } | |
430 #endif |